CN102886229B - CO (carbon monoxide) full-radial isothermal converting furnace - Google Patents
CO (carbon monoxide) full-radial isothermal converting furnace Download PDFInfo
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- CN102886229B CN102886229B CN201210377926.3A CN201210377926A CN102886229B CN 102886229 B CN102886229 B CN 102886229B CN 201210377926 A CN201210377926 A CN 201210377926A CN 102886229 B CN102886229 B CN 102886229B
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Abstract
The invention relates to a CO (carbon monoxide) full-radial isothermal converting furnace comprising a furnace body, a heat-exchanging pipe bundle and a gas collector and being characterized in that the furnace body comprises a first segment of furnace body at the upper part and a second segment of furnace body at the lower part, which are detachably connected, a gas distributor is arranged in the second segment of furnace body; the upper end and the lower end of the gas distributor are respectively connected with an upper pipe plate and a lower pipe plate; an upper seal is arranged above the upper pipe plate while a lower seal is arranged below the lower pipe plate; and the heat-exchanging pipe bundle is arranged in the gas distributor. Compared with the prior art, the CO full-radial isothermal converting furnace provided by the invention has the advantage that a series of problems such as long process, multiple reaction stages, high system pressure reduction, high equipment investment, likely-occurred temperature exceeding of the converting furnace, short catalyst life, and the like in a high water-gas ratio CO conversion technique in the prior art are solved.
Description
Technical field
The present invention relates to chemical industry equipment field, specifically refer to that a kind of CO overall diameter is to isothermal change furnace.
Background technology
In the at present domestic high concentration CO shift process design process generating at coal gasification, change furnace all adopts adiabatic reactor.Because CO content in crude synthesis gas is high, transformationreation is simultaneously again strong exothermic process, and therefore, converter unit all adopts many heat insulation furnace series connection to carry out CO transformationreation in flow setting, removes reaction heat between stove.This has also caused, and traditional high concentration CO shift process is complicated, reactor number of units is many, system pressure drop is large, equipment investment is high, change furnace temperature is controlled difficulty, and easy overtemperature when catalyst vulcanization and normal operation, exists potential safety hazard; The series of problems such as adiabatic temperature rise has suppressed CO molecular balance, separate unit change furnace CO low conversion rate.
The variety of issue existing in high concentration CO conversion process based on adiabatic change furnace, some engineering companies of recent year are also studied and develop congruence temperature change furnace.The operation principle of isothermal change furnace is simpler, in isothermal change furnace, inserts heat exchange pipeline, while there is CO transformationreation in stove, by the mode of boiler feedwater byproduct steam, removes reaction heat, so just can keep reaction bed temperature substantially constant.Compare adiabatic change furnace and can save the energy recovery equipment between stove, simplified technological process, reduced equipment investment.Although isothermal change furnace operation principle is simple, but in engineering design and device actual moving process, that the structure that constant-temperature oven wants to remove in time reaction heat, stove is wanted is simple, the catalyst change of stove and checking maintenance is convenient and swift, conversion gas distributes wants evenly, resolve in stove thermal stress issues also very crucial and important simultaneously.
Notification number be CN101721956A Chinese patent application a kind of < < isothermal low-temperature CO shift reactor > >, in this isothermal reactor, for removing the boiler water of reaction heat, from heat exchange pipeline top, enter, the steam producing is also to shift out with self-evaporating form from heat exchange pipeline top, this makes the mobility of boiler water very poor, by boiler water, removing the limited in one's ability of reaction heat, still there is the risk of overtemperature in reactor.
It is overheated that the saturated middle pressure steam that this isothermal reactor produces self has carried out, in through engineering approaches process, this design is difficult to implement, reason is that the specific heat of saturated middle pressure steam is very little, in the process that becomes overheated middle pressure steam by saturated middle pressure steam in isothermal reactor, the heat absorbing seldom, can not effectively remove transformationreation heat, be certain to cause isothermal reactor local overheating, burn out the transformation catalyst at local overheating place.
This isothermal reactor adopts totally-enclosed pattern, can only in equipment Manufacture Process, carry out the filling of catalyst, and the handling after catalysqt deactivation are changed and cannot be realized, if heat exchanger tube breaks in addition, also cannot repair and shutoff.
This isothermal inside reactor is divided into steam chest and hydroecium, and heat exchanger tube and inverted-loop tube are arranged at bottom, and complex structure is manufactured difficulty of processing large, and cost is high.
In this isothermal reactor, CO transformationreation occurs in more than 250 ℃, and inner cylindrical shell top and the bottom, heat-exchanging tube bundle place are all welded to connect with the outside cylindrical shell of reactor, and at high temperature in stove, thermal stress cannot discharge, and can cause inner cylindrical shell flexural deformation.
Summary of the invention
Technical problem to be solved by this invention is that the situation for prior art provides a kind of CO overall diameter to isothermal change furnace, in meeting high concentration CO transformationreation process, remove continuously, rapidly reaction heat, reactor can be maintained and under temperature constant state, carry out transformationreation, optimize and simplified apparatus structure simultaneously, for quick handling, replacing and the equipment checking maintenance of catalyst facilitates, also to solve the thermal stress release And Spread of Solute of reactor under worst hot case.
The present invention solves the problems of the technologies described above adopted technical scheme: this CO overall diameter is to isothermal change furnace, comprise body of heater, in described body of heater, be provided with the heat-exchanging tube bundle being formed by many heat exchanger tubes, described body of heater top is provided with reaction gas entrance and inspection manhole, the upper portion side wall of body of heater is provided with circulating cooling water out, bottom of furnace body is provided with conversion gas outlet and the first cooling water inlet, and the center of described body of heater is provided with gas collector; It is characterized in that described body of heater comprises top first paragraph body of heater and the bottom second segment body of heater removably connecting, in described second segment body of heater, be provided with gas distributor, the upper/lower terminal of this gas distributor is connected on upper perforated plate and lower perforated plate, the inwall interval of described upper perforated plate and described body of heater is gapped, the be tightly connected internal perisporium of described body of heater of the periphery of described lower perforated plate; The top of described upper perforated plate is provided with upper cover, the below of described lower perforated plate is provided with low head, described heat-exchanging tube bundle is arranged in described gas distributor, and described in each, two ends of heat exchanger tube are separately fixed on described upper and lower tube sheet and are communicated with respectively the cavity consisting of upper cover and upper perforated plate, low head and lower perforated plate; The upper end of described gas collector connects described upper perforated plate, and the lower end of gas collector is positioned at the cavity of low head and described bottom of furnace body formation through described low head; Described upper cover is provided with coolant outlet, and this coolant outlet connects described circulating cooling water out by outlet pipe, and described outlet pipe comprises the two parts that are detachably connected; Described low head is provided with the second cooling water inlet, and this coolant outlet connects described cooling water inlet by water inlet pipe, and described water inlet pipe comprises the two parts that are detachably connected
Preferably, between first paragraph body of heater and second segment body of heater, can connect by flange, body of heater can be supported on vertical placement on skirt.
In order to facilitate the filling of catalyst, described gas distributor can comprise a plurality of segmentations that are detachably connected, and each segmentation is removably connected and formed by two semicircular cylinders again.
Further, distributing homogeneity when guaranteeing that gas enters beds, described in each, segmentation includes outer cylinder body and is set in the inner barrel in described outer cylinder body, the outer cylinder body formation urceolus that is detachably connected described in each, described in each, inner barrel is detachably connected to form and is set in the inner core in described urceolus, and described outer cylinder body and described inner barrel interval gapped.Inner barrel plays the effect of quadratic distribution to reaction gas.
Preferably, the density of the pore described in such scheme on inner core is greater than described urceolus, and the aperture of the pore on described endoporus is less than or equal to 3mm.
Consider the settlement issues of catalyst in production process, described gas distributor is not offered pore near described upper perforated plate 100mm with interior position, to prevent that the reaction gas that catalyst sedimentation causes from refluxing and short circuit.
In above-mentioned each scheme, the part that described gas collector exposes to described low head is horn-like, and the middle part of described gas collector lower end port is provided with baffle plate, between the periphery of described baffle plate and described gas collector lower end port, be separated with the space of flowing out for synthesis gas.The Diffusion of gas stream that this structure can be used gas collector flows, the impact injury of having avoided the direct high speed impact body of heater of air-flow low head to cause body of heater, and short stay in the cavity of the gas that can use gas collector between low head and body of heater, guaranteed the inside and outside pressure balance of low head, and can make body of heater relative even with the environment temperature inside and outside cylindrical shell and low head, can not produce stress and concentrate.
Between baffle plate and gas collector, can be welded to connect by bearing rib, and strengthen by gusset.Preferably, collecting pipe top is near not perforate in upper perforated plate 100mm, to prevent that the catalyst sedimentation gas that induces reaction from refluxing and short circuit.
Consider the thermal expansion of gas collector, can on the lower surface of described upper perforated plate, be provided with adapter sleeve, it is interior and gapped with described upper perforated plate interval that the upper end of described gas collector is positioned at this adapter sleeve, and this gap can the thermal expansion of supplied gas collector.
Consider the thermal expansion of reacting furnace inside, can on described outlet pipe, expansion joint be set, to solve internal-response entire system thermal expansion problem.
The connected mode of lower perforated plate and body of heater can have multiple, preferably, can on the perisporium of described body of heater, be provided with locating ring, and the upper surface of this locating ring is provided with annular groove; Described lower perforated plate is provided with the annular lug suitable with described groove, and described projection is contained in described groove, and is provided with sealing ring between projection and groove.
The internal perisporium of described body of heater is provided with many group location-plates, every group of location-plate comprises left and right spaced left location-plate and right location-plate, accordingly, the sidewall of described upper perforated plate is provided with polylith locating piece, and described in each, locating piece is placed between corresponding left location-plate and right location-plate.
Preferably, on upper perforated plate, be welded with 4 locating pieces, coordinate radial location with 4 groups of location-plates that are welded on inboard wall of furnace body, to guarantee the Fast Installation of inner tube bank and the cooperation of described projection and groove.
This CO isothermal change furnace adopts overall diameter to Z-type structure on the whole, reaction gas upper entering and lower leaving, it between heat exchanger tube, is beds, in pipe, walk recirculated cooling water, cooling water absorbs conversion heat, the requirement of strength shifting out according to reaction heat, cooling water circulation process can be that Natural Circulation can be also forced circulation, recirculated cooling water downstream can arrange drum byproduct steam recovery waste heat.By the controlled circulation water yield, maintain the constant of transformationreation temperature.
Compared with prior art, the present invention has following features:
1, the circulation by cooling water reaches and shifts out fast high concentration CO reaction heat, its process can be also forced circulation of Natural Circulation, by the controlled circulation water yield, reach the object of control change reaction temperature, coolant outlet can arrange drum byproduct steam, recovery waste heat, structure of reactor is simple, small investment, and controllability is strong.
2, utilize overall diameter to the little feature of gas reactor pressure drop, inner reaction system is adopted to equipment self-weight sealing, cooling water inlet/outlet pipe all adopts flange to be connected with body of heater, internal-response system can wholely be extracted out, add that the quick handling that sectionally smooth join designs and removable bolt structure is catalyst of gas distributor and the checking maintenance of post facility facilitate.
3, the setting of internal-response systemic circulation coolant outlet expansion joint and location, gas-collecting pipe top cover cylinder gap, take into full account high temperature stress operating mode, solved the overall thermal expansion of internal-response system and the differential expansion of gas-collecting pipe, be conducive to stable equipment operation and increase the service life.
4, CO overall diameter adopts full radial structure to isothermal change furnace, and circulation area is large, and bed resistance is little, and pressure drop is little.Gas distributor adopts inside and outside barrel structure, to reaction gas quadratic distribution, make distribution of gas more even, be conducive to improve conversion ratio, simultaneously, take into full account catalyst sedimentation problem, at gas distributor and collecting pipe top, be all reserved with not aperture area of 100mm, can prevent backflow, the short circuit of conversion gas.
5, the present invention adopts shell-and-tube reactor, between Catalyst packing heat exchanger tube, and reaction bed temperature, stable, the life-span is long, and can increase CO conversion gas treating capacity by increasing gas distributor hop count mode, is conducive to the maximization of device.
Accompanying drawing explanation
Fig. 1 is the floor map of the embodiment of the present invention 1 assembly structure;
Fig. 2 is upper perforated plate location schematic diagram in the embodiment of the present invention 1;
Fig. 3 is lower perforated plate location schematic diagram in the embodiment of the present invention 1;
Fig. 4 is gas distributor structural representation in the embodiment of the present invention 1;
Fig. 5 be along A-A in Fig. 4 to cutaway view.
Fig. 6 is gas collector structural representation in the embodiment of the present invention 1;
Fig. 7 is gas distributor structural representation in the embodiment of the present invention 2.
Fig. 8 be along B-B in Fig. 4 to cutaway view.
The specific embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
Embodiment 1
As shown in Figures 1 to 6, this CO overall diameter comprises to isothermal change furnace:
Body of heater 1, comprise main body 11, upper cover 15 and low head 12, between main body 11 and upper cover 15, be provided with changeover portion 18, between main body 11 and changeover portion 18, adopt flange to removably connect, between main body 11 and low head 12, upper cover 15 and changeover portion 18, be and be welded to connect.Upper cover 15 tops are provided with reaction gas entrance 16 and top inspection manhole 17, changeover portion 18 sidewalls are provided with circulating cooling water out 14, main body 11 lower end sidewalls are provided with bottom inspection manhole 13, low head bottom is provided with the first cooling water inlet 19 and conversion gas outlet 110, body of heater 1 bottom is seated on skirt 6, and skirt 6 is the support plinth of this isothermal change furnace.
Internal-response system, is mainly comprised of parts such as heat-exchanging tube bundle 2, gas distributor 3, gas-collecting pipe 4, oval upper cover 26 and spherical low heads 22.Upper cover 26 tops are provided with the cooling water outlet pipe 25 being connected with above-mentioned circulating cooling water out 14, and the middle part of outlet pipe vertical portion is provided with expansion joint, and the effect of expansion joint is to eliminate the stress that outlet pipe thermal expansion produces; The horizontal component of outlet pipe is divided into two sections, and these two sections are detachably connected by flange.Circular low head 22 is provided with the internal overhaul manhole 21 communicating with above-mentioned bottom inspection manhole 13 and the recirculated cooling water import pipeline section being connected with above-mentioned the first cooling water inlet 19 flanges.Internal-response system also comprises upper perforated plate 27 and lower perforated plate 210, and upper perforated plate 27 relies on four locating pieces 211 that are welded on upper perforated plate and is welded on four groups of location-plates, the 212 cooperation radial locations in equipment barrel, guarantees axial displacement.Every group of location-plate comprises the spaced left location-plate in left and right and right location-plate, and locating piece is between the left and right location-plate of correspondence.On the internal perisporium of main body 11, be welded with locating ring 215, the upper surface of this locating ring is provided with annular groove; The bottom of locating ring is provided with 16 uniform bearing ribs 213, and these bearing ribs are welded on main body 11 and locating ring 215, to strengthen the load-bearing of locating ring; 8 jackscrews 214 are also set on locating ring, facilitate the dismounting of reaction system.Lower perforated plate 210 is provided with the annular lug suitable with groove, and projection is contained in groove, and is provided with sealing ring 217 between projection and groove.Between the inwall of the upper surface of locating ring and main body 11, be also welded with four locating cones 216, locating cone inclination at 45 °; The effect of locating cone is mainly used for lower perforated plate to locate.On upper and lower tube sheet, be equipped with the pore plugging for each heat exchanger tube 28, the two ends of each heat exchanger tube are plugged in respectively formation heat-exchanging tube bundle in corresponding pore, between each heat exchanger tube, in gap, be filled with catalyst, the middle part of heat-exchanging tube bundle is provided with a plurality of for supporting the support member 29 of heat-exchanging tube bundle.
Gas distributor 3, gas distributor pipe nipple bolt by several sections of same structures connects to form, every section of distributor includes inner barrel 35 and the outer cylinder body 34 that length is 500mm, and inside and outside cylindrical shell forms by two semicircular cylinders, semicircular cylinder end is welded with two groups of vertical connecting plates 33, and two semicircular cylindrical shell bolts are formed to columniform cylindrical shell together; After each section of inner barrel connects, form inner core, after each section of outer cylinder body connects, form sheathed urceolus outer tube.On inner barrel 35 and outer cylinder body 34, be evenly equipped with respectively circular pore as reactant gas passage; Inner core is as gas quadratic distribution device, and its perforate density is greater than urceolus and aperture is not more than 3mm, and meanwhile, inside and outside cylinder is apart from not offering pore within upper perforated plate 100mm height and position to prevent the catalyst sedimentation road of breathing hard that induces reaction.The top of inner core and urceolus and bottom are equipped with two and half ring flat-plates 31, half ring flat-plate split position is consistent with inner core and urceolus, and weld together with vertical connecting plate 33, half ring flat-plate 31 ends are provided with eight journal stirrups 32, for bolt and the location between upper-lower section gas distributor, the upper end of epimere cylindrical shell relies on the locating ring location with upper perforated plate 27 welding, and the lower end of hypomere cylindrical shell is put into 210 cannelures of opening on lower perforated plate and located.The segmentation bolt releasable connection of gas distributor designs, and can effectively improve the efficiency of loading and unloading of catalyst.
Gas collector 4, comprises collecting pipe 43, has the strip gas collection hole that width is less than 3mm on it, same, stays highly not perforate of 100mm, with the reaction gas short circuit that prevents from causing because of catalyst sedimentation at collecting pipe top near upper perforated plate 27.Collecting pipe welded top has circular cover 42, circular cover outside is provided with the collecting pipe abutment sleeve 41 that is welded on upper perforated plate 27, between sleeve and described cover plate 42, stay 2mm gap, 27 of cover plate and upper perforated plates are provided with 30mm gap to solve gas-collecting pipe 4 thermal expansion problems.The spherical low head 22 of collecting pipe 43 lower ends and internal-response system is welded to connect.Described collecting pipe bottom is provided with expander section 45, and expander outlet at bottom is provided with central circular baffle plate 47, makes gas be diffusion type and flows, and center baffle and expander section are welded to connect by bearing rib 46, and strengthen by 4 bearing ribs of welding 44.
Embodiment 2
As shown in Figure 7, Figure 8: to the gas distributor in isothermal change furnace, the distributor bolt by several sections of same structures forms this CO overall diameter, every section of distributor comprises inner core 55 and urceolus 54, the triangular fin interspace that inner core 55 is 500mm by length rearranges, urceolus 54 is comprised of two semicircular cylinders, and semicircle urceolus two ends are welded with two groups of vertical connecting plates 53 semicircular cylinder bolt is formed to cylindrical drum together.On urceolus 54, open uniform circular hole, inner core 55 is as gas quadratic distribution device, and its triangular fin interspace is less than urceolus aperture and is not more than 3mm, meanwhile, urceolus and upper perforated plate 27 contact positions stay 100mm highly not perforate to prevent the catalyst sedimentation road of breathing hard that induces reaction.The upper and lower two ends of triangle rib of inner core 55 and urceolus 54 tops and bottom welding are on 2 group of half ring flat-plate 51, half ring flat-plate split position is consistent with urceolus, and weld together with vertical connecting plate 53, half ring flat-plate 51 ends are provided with 8 journal stirrups 52, for bolt and the location between upper-lower section gas distributor, epimere gas distributor upper end relies on the locating ring location with upper perforated plate 27 welding, and hypomere gas distributor lower end is put into 210 cannelures of opening on lower perforated plate and located.
All the other contents are identical with example 1.
Claims (10)
1. a CO overall diameter is to isothermal change furnace, comprise body of heater, in described body of heater, be provided with the heat-exchanging tube bundle being formed by many heat exchanger tubes, described body of heater top is provided with reaction gas entrance and inspection manhole, the upper portion side wall of body of heater is provided with circulating cooling water out, bottom of furnace body is provided with conversion gas outlet and the first cooling water inlet, and the center of described body of heater is provided with gas collector; It is characterized in that described body of heater comprises top first paragraph body of heater and the bottom second segment body of heater removably connecting, in described second segment body of heater, be provided with gas distributor, the upper/lower terminal of this gas distributor is connected on upper perforated plate and lower perforated plate, the inwall interval of described upper perforated plate and described body of heater is gapped, the be tightly connected internal perisporium of described body of heater of the periphery of described lower perforated plate; The top of described upper perforated plate is provided with upper cover, the below of described lower perforated plate is provided with low head, described heat-exchanging tube bundle is arranged in described gas distributor, and described in each, two ends of heat exchanger tube are separately fixed on described upper and lower tube sheet and are communicated with respectively the cavity consisting of upper cover and upper perforated plate, low head and lower perforated plate; The upper end of described gas collector connects described upper perforated plate, and the lower end of gas collector is positioned at the cavity of low head and described bottom of furnace body formation through described low head; Described upper cover is provided with coolant outlet, and this coolant outlet connects described circulating cooling water out by outlet pipe, and described outlet pipe comprises the two parts that are detachably connected; Described low head is provided with the second cooling water inlet, and this second cooling water inlet connects the first described cooling water inlet by water inlet pipe, and described water inlet pipe comprises the two parts that are detachably connected.
2. CO overall diameter according to claim 1, to isothermal change furnace, it is characterized in that described gas distributor comprises a plurality of segmentations that are detachably connected, and each segmentation is removably connected and is formed again by two semicircular cylinders.
3. CO overall diameter according to claim 2 is to isothermal change furnace, it is characterized in that segmentation includes outer cylinder body and is set in the inner barrel in described outer cylinder body described in each, the outer cylinder body formation urceolus that is detachably connected described in each, described in each, inner barrel is detachably connected to form and is set in the inner core in described urceolus, and described outer cylinder body and described inner barrel interval gapped.
4. CO overall diameter according to claim 3 is to isothermal change furnace, and the density that it is characterized in that the pore on described inner core is greater than described urceolus, and the aperture of the pore on described endoporus is less than or equal to 3mm.
5. CO overall diameter according to claim 4 is to isothermal change furnace, it is characterized in that described gas distributor and gas collector all do not offering pore near described upper perforated plate 100mm with interior position.
According to the CO overall diameter described in the arbitrary claim of claim 1 to 5 to isothermal change furnace, it is characterized in that the part that described gas collector exposes to described low head is horn-like, and the middle part of described gas collector lower end port is provided with baffle plate, between the periphery of described baffle plate and described gas collector lower end port, be separated with the space of flowing out for synthesis gas.
7. CO overall diameter according to claim 6, to isothermal change furnace, is characterized in that the lower surface of described upper perforated plate is provided with adapter sleeve, and it is interior and gapped with described upper perforated plate interval that the upper end of described gas collector is positioned at this adapter sleeve.
8. CO overall diameter according to claim 7, to isothermal change furnace, is characterized in that described outlet pipe is provided with expansion joint.
9. CO overall diameter according to claim 8, to isothermal change furnace, is characterized in that the perisporium of described body of heater is provided with locating ring, and the upper surface of this locating ring is provided with annular groove; Described lower perforated plate is provided with the annular lug suitable with described groove, and described projection is contained in described groove, and is provided with sealing ring between projection and groove.
10. CO overall diameter according to claim 9 is to isothermal change furnace, the internal perisporium that it is characterized in that described body of heater is provided with many group location-plates, every group of location-plate comprises upper and lower spaced upper location-plate and lower location-plate, accordingly, the sidewall of described upper perforated plate is provided with polylith locating piece, and described in each, locating piece is contained between corresponding upper location-plate and lower location-plate.
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| CN201210377926.3A CN102886229B (en) | 2012-10-08 | 2012-10-08 | CO (carbon monoxide) full-radial isothermal converting furnace |
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| CN201210377926.3A CN102886229B (en) | 2012-10-08 | 2012-10-08 | CO (carbon monoxide) full-radial isothermal converting furnace |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105457563B (en) * | 2014-09-09 | 2020-03-13 | 航天长征化学工程股份有限公司 | Isothermal shift reactor with built-in tube bundle |
| CN104645897B (en) * | 2015-02-11 | 2016-05-04 | 南京敦先化工科技有限公司 | The controlled water shifting heat reactor of a kind of double-seal head |
| CN109264668B (en) * | 2018-09-30 | 2022-03-22 | 中石化宁波工程有限公司 | CO conversion process matched with methanol synthesis |
| CN108970548B (en) * | 2018-09-30 | 2021-06-11 | 中石化宁波工程有限公司 | Isothermal shift reaction device |
| CN115253924B (en) * | 2020-12-04 | 2023-06-16 | 中国成达工程有限公司 | Vertical radial flow reactor |
| CN113401871B (en) * | 2021-07-06 | 2023-01-06 | 中石化宁波工程有限公司 | Tubular sectional controllable semi-isothermal converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6814944B1 (en) * | 1999-12-28 | 2004-11-09 | Daikin Industries, Ltd. | Modifying device |
| CN102059078A (en) * | 2010-11-19 | 2011-05-18 | 北京航天万源煤化工工程技术有限公司 | Isothermal radial converter |
| CN202893318U (en) * | 2012-10-08 | 2013-04-24 | 中国石油化工集团公司 | CO total radial isothermal transformation furnace |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6814944B1 (en) * | 1999-12-28 | 2004-11-09 | Daikin Industries, Ltd. | Modifying device |
| CN102059078A (en) * | 2010-11-19 | 2011-05-18 | 北京航天万源煤化工工程技术有限公司 | Isothermal radial converter |
| CN202893318U (en) * | 2012-10-08 | 2013-04-24 | 中国石油化工集团公司 | CO total radial isothermal transformation furnace |
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