CN102886229A - CO (carbon monoxide) full-radial isothermal converting furnace - Google Patents
CO (carbon monoxide) full-radial isothermal converting furnace Download PDFInfo
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- CN102886229A CN102886229A CN2012103779263A CN201210377926A CN102886229A CN 102886229 A CN102886229 A CN 102886229A CN 2012103779263 A CN2012103779263 A CN 2012103779263A CN 201210377926 A CN201210377926 A CN 201210377926A CN 102886229 A CN102886229 A CN 102886229A
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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 the chemical industry equipment field, refer to that specifically a kind of CO overall diameter is to the isothermal change furnace.
Background technology
At present domestic in the high concentration CO shift process design process that coal gasification generates, change furnace all adopts adiabatic reactor.Because CO content is high in the crude synthesis gas, simultaneously transformationreation is again strong exothermic process, and therefore, converter unit all adopts many heat insulation furnace series connection to carry out the CO transformationreation in flow setting, removes reaction heat between stove.This has also caused, and traditional high concentration CO shift process is complicated, the reactor number of units is many, system pressure drop is large, equipment investment is high, change furnace temperature control difficulty, and there is potential safety hazard in easy overtemperature when catalyst vulcanization and normal operation; Adiabatic temperature rise has suppressed the CO molecular balance, the series of problems such as separate unit change furnace CO low conversion rate.
Based on the variety of issue that adiabatic change furnace exists in the high concentration CO conversion process, some engineering companies of recent year also are studied and develop congruence temperature change furnace.The operation principle of isothermal change furnace is simpler, inserts heat exchange pipeline in the isothermal change furnace, when in the stove CO transformationreation occuring, removes reaction heat by the mode of boiler feedwater byproduct steam, so just can keep the reaction bed temperature substantially constant.Compare adiabatic change furnace and can save 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 in time to remove reaction heat, stove is wanted is simple, the catalyst change of stove and checking maintenance is convenient and swift, conversion gas distributes wants evenly, and it is also very crucial and important to resolve simultaneously in the stove thermal stress issues.
Notification number be CN101721956A Chinese patent application a kind of " isothermal low-temperature CO shift reactor ", enter from the heat exchange pipeline top for the boiler water of removing reaction heat in this isothermal reactor, the steam that produces also is to shift out with self-evaporating form from the heat exchange pipeline top, this makes the mobile very poor of boiler water, remove the limited in one's ability of reaction heat by boiler water, 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, this design is difficult to implement in the through engineering approaches process, reason is that the specific heat of saturated middle pressure steam is very little, in isothermal reactor, become in the process of overheated middle pressure steam by saturated middle pressure steam, the heat that absorbs seldom, can not effectively remove the transformationreation heat, be certain to cause the isothermal reactor local overheating, burn out the transformation catalyst at local overheating place.
This isothermal reactor adopts totally-enclosed pattern, can only carry out the filling of catalyst in equipment Manufacture Process, and the loading and unloading behind the catalysqt deactivation are changed and can't be realized, if heat exchanger tube breaks in addition, also can't 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 the bottom, complex structure, and it is large to make difficulty of processing, and cost is high.
The CO transformationreation occurs in more than 250 ℃ in this isothermal reactor, and inner cylindrical shell top and the bottom, heat-exchanging tube bundle place all are welded to connect with the outside cylindrical shell of reactor, and at high temperature thermal stress can't discharge in the stove, 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 the isothermal change furnace, in satisfying high concentration CO transformationreation process, remove continuously, rapidly reaction heat, reactor can be maintained carry out transformationreation under the temperature constant state, optimize simultaneously and the simplified apparatus structure, for quick loading and unloading, replacing and the equipment checking maintenance of catalyst facilitates, also to solve the thermal stress release And Spread of Solute of reactor under the worst hot case.
The present invention solves the problems of the technologies described above the technical scheme that adopts: this CO overall diameter is to the isothermal change furnace, comprise body of heater, be provided with the heat-exchanging tube bundle that is formed by many heat exchanger tubes in the described body of heater, 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 coolant outlet, bottom of furnace body is provided with conversion gas outlet and 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 that removably connects, be provided with gas distributor in the described second segment body of heater, the upper/lower terminal of this gas distributor is connected on upper perforated plate and the 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 the described gas distributor, and the two ends of each described heat exchanger tube are separately fixed on the described upper and lower tube sheet and are communicated with respectively the cavity that is made 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 cavity that described low head is positioned at low head and described bottom of furnace body formation is passed in the lower end of gas collector; Described upper cover is provided with coolant outlet, and this coolant outlet connects described coolant outlet by outlet pipe, and described outlet pipe comprises the two parts that are detachably connected; Described low head is provided with the 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, can connect by flange between first paragraph body of heater and the second segment body of heater, body of heater can be supported on vertical placement on the skirt.
In order to make things convenient for the filling of catalyst, described gas distributor can comprise a plurality of segmentations that are detachably connected, and each segmentation is removably connected by two semicircular cylinders again and consists of.
Further, distributing homogeneity when guaranteeing that gas enters beds, each described segmentation includes outer cylinder body and is set in the interior inner barrel of described outer cylinder body, each described outer cylinder body formation urceolus that is detachably connected, each described inner barrel is detachably connected and forms the inner core be set in the described urceolus, and described outer cylinder body and described inner barrel interval are gapped.Inner barrel plays the effect of quadratic distribution to reaction gas.
Preferably, the density of the pore described in the such scheme on the inner core is greater than described urceolus, and the aperture of the pore on the described endoporus is less than or equal to 3mm.
Consider the settlement issues of catalyst in the production process, described gas distributor is not offered pore near described upper perforated plate 100mm with interior position, refluxes and short circuit to prevent the reaction gas that catalyst sedimentation causes.
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, is separated with the space of flowing out for synthesis gas between the periphery of described baffle plate and described gas collector lower end port.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 that body of heater is caused, and can use short stay in the cavity of gas between low head and body of heater of gas collector, guaranteed the inside and outside pressure balance of low head, and can make the inside and outside environment temperature of body of heater and cylindrical shell and low head relative even, can not produce stress and concentrate.
Can be welded to connect by bearing rib between baffle plate and the gas collector, and strengthen by gusset.Preferably, the collecting pipe top is near not perforate in the upper perforated plate 100mm, refluxes and short circuit to prevent the catalyst sedimentation gas that induces reaction.
Consider the thermal expansion of gas collector, can be provided with adapter sleeve at the lower surface of described upper perforated plate, 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, but this gap supplied gas collector thermal expansion.
Consider the thermal expansion of reacting furnace inside, can expansion joint be set at described outlet pipe, 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 be provided with locating ring at the perisporium of described body of heater, 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 the described groove, and is provided with sealing ring between projection and the groove.
The internal perisporium of described body of heater is provided with many group location-plates, every group of location-plate comprises left location-plate and the right location-plate that left and right interval arranges, accordingly, the sidewall of described upper perforated plate is provided with the polylith locating piece, and each described locating piece is placed between the corresponding left location-plate and right location-plate.
Preferably, be welded with 4 locating pieces on the upper perforated plate, cooperate radial location with 4 groups of location-plates on being welded on inboard wall of furnace body, with the Fast Installation that guarantees inner tube bank and the cooperation of described projection and groove.
This CO isothermal change furnace adopts overall diameter to the Z-type structure on the whole, the reaction gas upper entering and lower leaving, it is beds between heat exchanger tube, walk recirculated cooling water in the pipe, cooling water absorbs conversion heat, according to the requirement of strength that reaction heat shifts out, the cooling water circulation process can be that Natural Circulation also can be forced circulation, and the recirculated cooling water downstream can arrange drum byproduct steam recovery waste heat.Keep the constant of transformationreation temperature by the controlled circulation water yield.
Compared with prior art, the present invention has following features:
1, reaches and shift out fast the high concentration CO reaction heat by the cooling water circuit, its process can be also forced circulation of Natural Circulation, reach the purpose of control change reaction temperature by the controlled circulation water yield, coolant outlet can arrange the drum byproduct steam, recovery waste heat, structure of reactor is simple, small investment, and controllability is strong.
2, utilize overall diameter to the little characteristics of gas reactor pressure drop, inner reaction system is adopted the equipment self-weight sealing, the cooling water inlet/outlet pipe is connected with body of heater and is adopted flange to connect, the internal-response system can wholely be extracted out, add that sectionally smooth join design and the removable bolt structure of gas distributor is that the quick loading and unloading of catalyst and the checking maintenance of post facility facilitate.
3, the setting of internal-response systemic circulation coolant outlet expansion joint and gas-collecting pipe top cover cylinder gap location, take into full account the 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, the CO overall diameter adopts overall diameter to structure to the 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 the reaction gas quadratic distribution, make distribution of gas more even, be conducive to improve conversion ratio, simultaneously, take into full account the catalyst sedimentation problem, all be reserved with not aperture area of 100mm at gas distributor and collecting pipe top, can prevent backflow, the short circuit of conversion gas.
5, the present invention adopts shell-and-tube reactor, between the 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.
Description of drawings
Fig. 1 is the floor map of the embodiment of the invention 1 assembly structure;
Fig. 2 is upper perforated plate location schematic diagram in the embodiment of the invention 1;
Fig. 3 is lower perforated plate location schematic diagram in the embodiment of the invention 1;
Fig. 4 is gas distributor structural representation in the embodiment of the invention 1;
Fig. 5 be along A-A among Fig. 4 to cutaway view.
Fig. 6 is gas collector structural representation in the embodiment of the invention 1;
Fig. 7 is gas distributor structural representation in the embodiment of the invention 2.
Fig. 8 be along B-B among Fig. 4 to cutaway view.
The specific embodiment
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.
Embodiment 1
To shown in Figure 6, this CO overall diameter comprises to the isothermal change furnace such as Fig. 1:
Body of heater 1, comprise main body 11, upper cover 15 and low head 12, be provided with changeover portion 18 between main body 11 and the upper cover 15, the employing flange removably connects between main body 11 and the changeover portion 18, is between main body 11 and low head 12, upper cover 15 and the changeover portion 18 to 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, the low head bottom is provided with cooling water inlet 19 and conversion gas outlet 110, body of heater 1 bottom is seated on the skirt 6, and skirt 6 is the support plinth of this isothermal change furnace.
The internal-response system mainly is 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 that is connected with above-mentioned circulating cooling water out 14, and the outlet pipe vertically middle part of part is provided with expansion joint, and the effect of expansion joint is to eliminate the stress that the 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 that communicates with above-mentioned bottom inspection manhole 13 and the recirculated cooling water import pipeline section that is connected with above-mentioned cooling water inlet 19 flanges.The 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 the upper perforated plate and the four groups of location-plates 212 that are welded on the equipment barrel to cooperate radial locations, guarantees axial displacement.Every group of location-plate comprises that between left and right every the left location-plate and the right location-plate that arrange, locating piece is between the left and right location-plate of correspondence.Be welded with locating ring 215 on the internal perisporium of main body 11, 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 the locating ring 215, to strengthen the load-bearing of locating ring; 8 jackscrews 214 also are set on the locating ring, make things convenient for the dismounting of reaction system.Lower perforated plate 210 is provided with the annular lug suitable with groove, and projection is contained in the groove, and is provided with sealing ring 217 between projection and the groove.Also be welded with four locating cones 216 between the inwall of the upper surface of locating ring and main body 11, locating cone inclination at 45 °; The effect of locating cone mainly is for lower perforated plate is located.Be equipped with the pore that plugs for each heat exchanger tube 28 on the upper and lower tube sheet, the two ends of each heat exchanger tube are plugged in respectively and form heat-exchanging tube bundle in the corresponding pore, be filled with catalyst in each heat exchanger tube gap, the middle part of heat-exchanging tube bundle is provided with a plurality of support members 29 for supporting heat-exchanging tube bundle.
Embodiment 2
Such as Fig. 7, shown in Figure 8: the gas distributor of this CO overall diameter in the isothermal change furnace is comprised of the distributor bolt of several sections same structures, every section distributor comprises inner core 55 and urceolus 54, inner core 55 is that the triangular fin interspace of 500mm rearranges by length, urceolus 54 is comprised of two semicircular cylinders, and semicircle urceolus two ends are welded with two groups of vertical connecting plates 53 the semicircular cylinder bolt is formed cylindrical drum together.Open uniform circular hole on the urceolus 54, inner core 55 is as gas quadratic distribution device, and its triangular fin interspace is less than the urceolus aperture and be not more than 3mm, simultaneously, 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.Two ends and urceolus 54 tops and bottom welding are on 2 group of half ring flat-plate 51 about the triangle rib of inner core 55, 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, be used for bolt and location between the 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 on the lower perforated plate 210 cannelures of opening and located.
All the other contents are identical with example 1.
Claims (10)
1. a CO overall diameter is to the isothermal change furnace, comprise body of heater, be provided with the heat-exchanging tube bundle that is formed by many heat exchanger tubes in the described body of heater, 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 coolant outlet, bottom of furnace body is provided with conversion gas outlet and 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 that removably connects, be provided with gas distributor in the described second segment body of heater, the upper/lower terminal of this gas distributor is connected on upper perforated plate and the 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 the described gas distributor, and the two ends of each described heat exchanger tube are separately fixed on the described upper and lower tube sheet and are communicated with respectively the cavity that is made 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 cavity that described low head is positioned at low head and described bottom of furnace body formation is passed in the lower end of gas collector; Described upper cover is provided with coolant outlet, and this coolant outlet connects described coolant outlet by outlet pipe, and described outlet pipe comprises the two parts that are detachably connected; Described low head is provided with the 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.
2. CO overall diameter according to claim 1 is characterized in that to the isothermal change furnace described gas distributor comprises a plurality of segmentations that are detachably connected, and each segmentation is removably connected by two semicircular cylinders again and consists of.
3. CO overall diameter according to claim 2 is to the isothermal change furnace, it is characterized in that each described segmentation includes outer cylinder body and is set in the interior inner barrel of described outer cylinder body, each described outer cylinder body formation urceolus that is detachably connected, each described inner barrel is detachably connected and forms the inner core be set in the described urceolus, and described outer cylinder body and described inner barrel interval are gapped.
4. CO overall diameter according to claim 3 is to the isothermal change furnace, and the density that it is characterized in that the pore on the described inner core is greater than described urceolus, and the aperture of the pore on the described endoporus is less than or equal to 3mm.
5. CO overall diameter according to claim 5 is to the 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 claim 1 to the described CO overall diameter of 5 arbitrary claims to the 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, is separated with the space of flowing out for synthesis gas between the periphery of described baffle plate and described gas collector lower end port.
7. CO overall diameter according to claim 6 is characterized in that to the isothermal change furnace 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 is characterized in that to the isothermal change furnace described outlet pipe is provided with expansion joint.
9. CO overall diameter according to claim 8 is characterized in that to the isothermal change furnace 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 the described groove, and is provided with sealing ring between projection and the groove.
10. CO overall diameter according to claim 9 is to the 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 location-plate and the lower location-plate that upper and lower interval arranges, accordingly, the sidewall of described upper perforated plate is provided with the polylith locating piece, and each described locating piece is contained between the 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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104645897A (en) * | 2015-02-11 | 2015-05-27 | 南京敦先化工科技有限公司 | Dual-seal-head controllable water heat removing reactor |
| CN105457563A (en) * | 2014-09-09 | 2016-04-06 | 航天长征化学工程股份有限公司 | Isothermal shift reactor with built-in tube bundle |
| CN108970548A (en) * | 2018-09-30 | 2018-12-11 | 中石化宁波工程有限公司 | Equal temperature shift reactions device |
| CN109264668A (en) * | 2018-09-30 | 2019-01-25 | 中石化宁波工程有限公司 | The CO conversion process of mating methanol-fueled CLC |
| CN112588207A (en) * | 2020-12-04 | 2021-04-02 | 中国成达工程有限公司 | Vertical radial flow reactor |
| CN113401871A (en) * | 2021-07-06 | 2021-09-17 | 中石化宁波工程有限公司 | Tubular sectional controllable semi-isothermal converter |
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| 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 |
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| 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 |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105457563A (en) * | 2014-09-09 | 2016-04-06 | 航天长征化学工程股份有限公司 | Isothermal shift reactor with built-in tube bundle |
| CN104645897A (en) * | 2015-02-11 | 2015-05-27 | 南京敦先化工科技有限公司 | Dual-seal-head controllable water heat removing reactor |
| CN108970548A (en) * | 2018-09-30 | 2018-12-11 | 中石化宁波工程有限公司 | Equal temperature shift reactions device |
| CN109264668A (en) * | 2018-09-30 | 2019-01-25 | 中石化宁波工程有限公司 | The CO conversion process of mating methanol-fueled CLC |
| CN108970548B (en) * | 2018-09-30 | 2021-06-11 | 中石化宁波工程有限公司 | Isothermal shift reaction device |
| 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 |
| CN112588207A (en) * | 2020-12-04 | 2021-04-02 | 中国成达工程有限公司 | Vertical radial flow reactor |
| CN112588207B (en) * | 2020-12-04 | 2022-09-16 | 中国成达工程有限公司 | Vertical radial flow reactor |
| CN113401871A (en) * | 2021-07-06 | 2021-09-17 | 中石化宁波工程有限公司 | Tubular sectional controllable semi-isothermal converter |
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