CN105457563B - Isothermal shift reactor with built-in tube bundle - Google Patents
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- CN105457563B CN105457563B CN201410455211.4A CN201410455211A CN105457563B CN 105457563 B CN105457563 B CN 105457563B CN 201410455211 A CN201410455211 A CN 201410455211A CN 105457563 B CN105457563 B CN 105457563B
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Abstract
The invention relates to a built-in tube bundle isothermal transformation reactor, which is characterized in that an axial annular tube bundle which is built in and uniformly distributed on a catalyst bed layer along the circumferential direction is adopted to remove reaction heat so as to realize isothermal transformation; a central tube bundle arranged in a central tube is adopted to preheat feed gas entering a reactor, so that the gas-gas heat exchanger is arranged in a built-in manner; the isothermal transformation reactor comprises a pressure-bearing shell, a catalyst basket, an axial annular tube bundle, a central tube and a central tube bundle; the axial annular tube bundle consists of an upper annular tube box, a lower annular tube box, an upper annular tube plate, a lower annular tube plate and a heat exchange tube; the invention effectively reduces the manufacturing cost of equipment by adopting the built-in pipe bundle, effectively reduces the size of the pipe plate by adopting the bending structure of the end part of the heat exchange pipe, effectively isolates the contact between the welding spot of the pipe end and the high-temperature zone of the bed layer by the heat insulation layer laid between the pipe plate and the high-temperature catalyst bed layer, reduces the leakage probability and improves the reliability of the equipment; the invention has the advantages of compact structure, low manufacturing cost, easy maintenance, high reliability, complete functions and wide applicability.
Description
Technical Field
The invention belongs to the technical field of chemical equipment, relates to an isothermal shift reactor, and particularly relates to an isothermal shift reactor with a built-in tube bundle.
Background
The CO shift reaction is a reversible, exothermic reaction, and has the reaction equation:
when the CO content in the feed gas is high, the reaction heat must be removed in time, otherwise the temperature of the shift converter is rapidly increased, the catalyst in the shift converter is greatly damaged, the service life of the catalyst can be directly shortened, and the catalyst can be directly burned to lose efficacy; meanwhile, the shift reaction is a reversible reaction, and the reaction cannot be carried out deeply because the reaction heat is not removed in time.
At present, coal gasification processes generally adopted are coal water slurry gasification or pulverized coal gasification which takes coal as a raw material and pure oxygen as a gasification agent, the CO content of raw material gas prepared by the processes reaches 50-76%, the traditional shift converter can not meet the high CO shift requirement at all, and a complicated process of multi-stage, thin bed and intermediate multiple heat exchange is generally adopted to meet the shift requirement, so that the process is longer, the investment is larger, and meanwhile, the problem of temperature runaway can be caused if the temperature is not controlled.
The patent number is "ZL 200920102700.6", the name is "a water pipe type reactor"'s chinese utility model patent, discloses a water pipe type reactor, including reactor shell and the cold tube bank of assembling in the reactor shell, the cold tube bank comprises the cold tube bank heat transfer cell cube that more than one was parallelly connected each other, the vertical align to grid of cold tube bank heat transfer cell cube in the reactor shell, the soda export of cold tube bank heat transfer cell cube is once through soda communicating pipe, soda house steward connects the export of head soda, the water inlet of cold tube bank heat transfer cell cube connects the lower part water inlet header behind the water connecting pipe. Although the water pipe type reactor can carry out gas-liquid heat exchange to remove reaction heat, the equipment has the problems of complex structure, more welding spots, low reliability and difficult maintenance.
The patent number is ZL 200810024974.8, and the Chinese invention patent named as 'multiphase heat transfer and heat insulation shell-and-tube reactor' discloses a multiphase heat transfer and heat insulation shell-and-tube reactor, which comprises a cylinder, an upper end enclosure, a gas side end enclosure and a lower end enclosure, wherein the cylinder is fixedly connected with the upper end enclosure, the gas side end enclosure is positioned in the cylinder, the cylinder is fixedly connected with a lower tube plate, the lower end enclosure is fixedly connected with the lower tube plate, the gas side end enclosure is fixedly connected with the upper tube plate, the lower tube plate and the lower end enclosure form a first chamber, the upper tube plate and the gas side end enclosure form a second chamber, the first chamber and the second chamber are connected through a water side heat exchange tube, at least part of the water side heat exchange tube is positioned in a third chamber, and a cold air. Although the device can transfer heat of different media by the built-in tube bundle, the reactor has a hot wall structure (high-temperature media are directly contacted with the wall of the reactor), and is provided with a large tube plate and a built-in large end socket, so that more materials are used; moreover, the welding point of the heat exchange tube and the tube plate is exposed in a bed high-temperature area, so that the reliability of the structure is influenced; in addition, the reaction is adiabatic, and the disadvantages of difficult control of temperature rise and the like inherent in the reaction still exist.
In view of the above, there is a need for an isothermal shift reactor that can solve the above-mentioned technical problems in the prior art to meet the needs of practical chemical production operations.
Disclosure of Invention
The invention aims to provide an isothermal shift reactor with a built-in tube bundle, which solves the technical problems in the prior art, thereby shortening the process flow, saving the production investment, reducing the manufacturing cost, improving the production reliability and meeting the requirements of actual chemical production operation.
In order to achieve the aim, the invention provides an isothermal shift reactor with a built-in tube bundle, which comprises a pressure-bearing shell, a raw material gas inlet, a shift gas outlet, a boiler water inlet, a boiler water outlet and a catalyst discharge opening, wherein the raw material gas inlet, the shift gas outlet, the boiler water inlet, the boiler water outlet and the catalyst discharge opening are arranged on the pressure-bearing shell;
the catalyst basket, the axial annular tube bundle, the central tube, the annular cavity cylinder and the central tube bundle are arranged in the pressure-bearing shell; the axial annular tube bundle is connected with the boiler water outlet through an expansion joint to absorb the thermal expansion deformation difference between the tube bundle and the pressure-bearing shell; the catalyst is arranged in the space formed by the catalyst basket, the central pipe and the axial annular tube bundle; the axial annular tube bundle consists of a boiler water distributor, a boiler water collector and heat exchange tubes connected with an upper annular tube plate and a lower annular tube plate; the boiler water distributor consists of a lower annular pipe box and a lower annular pipe plate; the boiler water collector consists of an upper annular pipe box and an upper annular pipe plate, and the heat exchange pipe consists of a straight pipe and an end part bent pipe;
the boiler water pipe is connected with the boiler water inlet, the upper boiler water pipe is connected with the boiler water outlet, and the supporting plate is used for supporting and fixing the heat exchange tube.
In the above scheme, preferably, the combined structure of gas-liquid heat exchange through the axial annular tube bundle and gas-gas heat exchange through the central tube bundle is adopted; the raw material gas enters the top of the reactor through the central tube bundle, is redistributed to the annular space of the catalyst basket, and then enters the radial flow structure of the catalyst bed layer and the cold wall structure of the high-temperature change gas after the contact reaction of the pressure-bearing shell through the hole array of the catalyst basket along the radial direction.
It may also be preferred that it employs a single structure of gas-liquid heat exchange only through the axial annular tube bundle; the raw material gas enters the top of the reactor through a raw material gas inlet at the top, is redistributed to an annular space of the catalyst basket, and then enters a radial flow structure of a catalyst bed layer and a cold wall structure of high-temperature shift gas after a pressure-bearing shell does not contact with the reaction through a hole array of the catalyst basket along the radial direction.
Preferably, the straight tube and the end bent tube of the heat exchange tube form a direct connection structure with the upper annular tube plate and the lower annular tube plate; the upper annular tube box and the lower annular tube box are of half-tube structures and are directly connected with the tube plates.
It is also preferable that the upper and lower annular headers are equally divided into at least two sections.
It is also preferable that the upper and lower annular headers are equally divided into three sections.
It may also be preferred that refractory is laid between the lower annular tube sheet and the catalyst bed.
It may also be preferred that the axial annular tube bundle and the central tube bundle are notched both on the inside and on the outside, i.e. leave an area of no tubes running.
It is also preferable that the central tube bundle is arranged in the central tube, and the central tube bundle arrangement mode that raw material gas enters and exits from the bottom through a tube pass, conversion gas enters and exits from the top through a shell pass through a gas collecting annular cavity, and countercurrent heat exchange is realized through baffling of a baffling rod is adopted.
It is also preferred that the entire high-temperature zone of the bed layer is free of welded joints.
Compared with the prior art, the invention has the following advantages:
aiming at the problems of the existing shift reactor, the isothermal shift reactor with the built-in tube bundle is characterized in that a heat exchange tube is arranged in a catalyst bed layer, and boiler water is introduced into the heat exchange tube; boiler water exchanges heat with the shift gas through the heat exchange tube, the boiler water absorbs heat to be vaporized, and the heat of the shift reaction is removed in time; when the pressure of the boiler water is fixed, the temperature of the boiler water is stable; when the heat exchange tubes are uniformly arranged in the catalyst bed layer, the heat released by the shift reaction can be timely removed by boiler water; thus, the temperature of the transformation gas can be kept constant or the temperature rise is small, and isothermal transformation is realized; the isothermal transformation can protect the catalyst from burning loss, prolong the service life of the catalyst and reduce the replacement cost of the catalyst; meanwhile, as the heat generated by the reaction is removed in time, the reaction driving force can be maintained, and the conversion rate of CO is increased; in addition, the temperature distribution in the catalyst bed layer can be controlled by the arrangement mode of the heat exchange tubes, and the temperature of the feed gas can be improved by arranging a small number of heat exchange tubes on the outer ring, so that the reaction efficiency is improved; the heat exchange pipes arranged in the middle can remove the heat generated by conversion in time and maintain the temperature of the bed layer constant; the heat exchange tubes with less arrangement in the inner ring can further improve the temperature of the converted gas and provide heat for preheating the feed gas; the raw gas is preheated by high-temperature conversion gas after reaction through a central tube bundle arranged in a central tube, so that the raw gas passing through the central tube bundle reaches the activation temperature, enters a catalyst bed layer through a hole array of a catalyst basket, and starts conversion reaction.
The isothermal shift reactor with the built-in tube bundle adopts a built-in structure, and the reaction heat is removed by the axial annular tube bundle distributed in a catalyst bed layer according to a certain rule, so that isothermal shift is realized; a heat exchange tube bundle arranged in a central tube is adopted to preheat feed gas entering a reactor, so that the gas-gas heat exchanger is arranged in a reactor; boiler water is used as a heat-conducting medium, the flow is short, the flow resistance is small, and natural circulation is adopted; the heat exchange tube is made of a whole tube, a splicing joint is not needed, only the tube end is welded with the tube plate, two annular tube boxes are adopted, the welding seam is short, the number of welding nodes is small, all welding spots are arranged outside the high-temperature bed layer, the high-temperature zone of the whole bed layer is free of welding joints, the leakage probability is reduced, and the reliability of the device is improved; raw material gas in the central tube bundle flows through a tube pass, converted gas flows through a shell pass, countercurrent heat exchange is carried out, the heat exchange temperature difference is large, the heat exchange efficiency is high, and the temperature of a converted gas outlet can be effectively reduced; the raw material gas is fed in and discharged out from the bottom, and passes through the tube pass of the central tube bundle; the mode that the transform gas adopted and advanced from top to bottom, walk the shell side of center tube bank, can save the central pipeline that admits air to effectively reduce the heat exchanger diameter, reduce the center tube diameter.
The isothermal shift reactor with the built-in tube bundle has the advantages of short radial flow, small flow resistance, unlimited catalyst bed height and the like by adopting a radial shift furnace cold wall structure; the reaction heat is removed by adopting the built-in axial annular tube bundle, so that the defects that the adiabatic reaction temperature rise is large, the reaction depth is low, heat exchange and temperature reduction are required to be led out from the middle, otherwise the catalyst can be burnt and the like are avoided; preheating raw material gas by using a built-in central tube bundle and transformed high-temperature reaction gas; the gas-gas heat exchanger is internally arranged, and the heat exchanger adopts a pressure difference design, so that the investment of the externally arranged gas-gas heat exchanger can be saved, and the flow is shortened; the saturation temperature of boiler water can be adjusted through adjusting the pressure of the boiler water in the annular tube bundle heat exchange device, the temperature difference between the conversion gas and the boiler water is adjusted, the heat exchange efficiency is adjusted, the quantity value of the removed heat is controlled, and finally the temperature of the conversion gas entering the central tube can be adjusted; the heat value moved out by adjusting the ring-shaped pipe bundle can be adjusted, the central pipe bundle can exchange heat at full flow, and the preheating temperature of the feed gas can be controlled without flow adjustment.
The invention relates to an isothermal transformation reactor with a built-in tube bundle, which is characterized in that an axial annular tube bundle is as follows: (1) the tube bundle heat exchange tubes are arranged at equal intervals along the radial direction of the furnace body and are uniformly distributed in the circumferential direction, the whole tube bundle heat exchange tube is basically and uniformly distributed in the middle of the bed layer, the heat exchange is uniform, the heat exchange effect is good, and isothermal transformation can be realized; (2) the middle heat exchange tube of the annular tube bundle is a straight tube, and the end parts of the heat exchange tubes at the inner side and the outer side edges are bent towards the middle, so that the size of the annular tube bundle is reduced, and the tube boxes at the two ends are compact in structure; (3) the annular tube box and the annular tube plate are adopted, so that the stress structure is good, the tube plate is thin, and the weight is light; (4) the heat exchange tube is integrally manufactured without splicing joints, and the welding joints of the heat exchange tube and the annular tube plate, the tube box and the annular tube plate, and the tube box and the external connecting tube are positioned outside the catalyst bed layer; the lower annular tube plate is contacted with the catalyst bed layer, and refractory materials are arranged between the lower annular tube plate and the catalyst bed layer to effectively isolate a high-temperature region; the whole bed layer high-temperature area has no welding joint, thereby reducing the leakage probability and improving the reliability of the device; (5) two non-distributing pipe areas are reserved on the inner side and the outer side of the central pipe bundle and the axial annular pipe bundle, and two notches are reserved for workers to load, unload and clean the catalyst, so that the catalyst is convenient to load and unload; (6) an expansion joint is arranged between the upper boiler water connecting pipe and the boiler water outlet, so that the thermal expansion difference between the annular tube bundle and the shell can be compensated, and the size of the expansion joint is effectively reduced.
The invention relates to an isothermal conversion reactor with a built-in tube bundle, wherein the built-in central tube bundle is characterized in that: (1) the central tube bundle is arranged in the reactor, the heat exchanger can adopt a pressure difference design, a pressure-bearing shell and a connecting flange when the heat exchanger is arranged externally can be omitted, the thickness of the tube plate is effectively reduced, and the investment of the gas-gas heat exchanger is greatly reduced; (2) the raw material gas passes through the tube pass, the conversion gas passes through the shell pass, the countercurrent heat exchange is realized, the heat exchange temperature difference is large, the heat exchange efficiency is high, and the temperature of the conversion gas outlet can be effectively reduced; (3) an upper ring tube plate of the central tube bundle is fixed on the central tube bundle, a lower end tube is inserted into the feed gas inlet tube, the middle part of the upper ring tube plate is sealed by adopting a filler, and the lower end tube can slide, so that the thermal expansion difference between the central tube and the central tube bundle can be eliminated; (4) the feed gas adopts the mode of going in and going out from top to bottom, walks the tube side of central tube bank, and the transform gas adopts the mode of going in and going out from bottom to top, walks the shell side of central tube bank, and heat transfer against the current, the heat transfer difference in temperature is big, and is efficient, and can save the central pipeline that admits air to effectively reduce the heat exchanger diameter, reduce the center tube diameter.
The invention relates to an isothermal shift reactor with a built-in tube bundle, which can also move a gas-gas heat exchanger-central tube bundle positioned in a central tube out of a shift converter, remove a ring cavity cylinder, reserve the central tube, and fully distribute the whole bed space (except for reserved maintenance space) to the ring tube bundle, wherein the reaction heat is completely taken away by cooling fluid in a heat exchange tube, and the temperature control is realized by the temperature and pressure parameters and the flow control of the fluid in the tube; the simplified example keeps the high reliability characteristic of the original scheme and greatly simplifies the process flow in the furnace.
The isothermal shift reactor with the built-in tube bundle adopts the axial annular tube bundle and the integral central tube bundle structure, so that the arrangement of the heat exchange tubes is convenient, and the installation and the transportation of the tube bundle are convenient; the straight pipe and the end bending pipe of the heat exchange pipe form a compact connection structure with the upper annular pipe plate and the lower annular pipe plate; the upper and lower annular pipe boxes adopt a half-pipe structure and are directly connected with the pipe plate, and the pipe boxes are divided into a plurality of sections and can be connected by annular flanges so as to be convenient to overhaul; refractory materials are paved between the lower annular tube plate and the catalyst bed layer, and the heat exchange tube has no welding spot in the whole bed layer high-temperature area and high reliability; gaps (non-pipe distribution areas) are reserved on the inner side and the outer side of the axial annular pipe bundle so as to facilitate the access of maintainers to load and unload the catalyst; the central tube bundle (gas-gas heat exchanger) is arranged in the central tube, raw material gas which is more space-saving enters and exits from the bottom along the tube pass, conversion gas enters and exits from the top along the shell pass through the gas collection annular cavity, and the counter-flow heat exchange is realized through the deflection of the deflection rod.
The isothermal shift reactor with the built-in tube bundle, provided by the invention, provides an innovatively designed reactor structure and an internal arrangement mode, adopts a new process and a new heat exchange structure, overcomes the defects and shortcomings of the conventional reactor, improves the reaction efficiency, improves the internal space utilization rate, reduces the process resistance, reduces the equipment investment and the operation cost, and has great technical breakthrough.
The isothermal shift reactor with the built-in tube bundle can solve the technical problems in the prior art, thereby shortening the process flow, saving the production investment, reducing the manufacturing cost, improving the production reliability and meeting the requirements of actual chemical production operation.
Drawings
The invention will be further described with reference to the following figures and embodiments:
FIG. 1 is a schematic diagram of the configuration of an internal tube-bundle isothermal shift reactor of the present invention with an axial annular tube bundle and a central tube bundle;
FIG. 2 is a top view of a schematic structural view of the internal tube-bundle isothermal shift reactor of FIG. 1 of the present invention with an axial annular tube bundle and a center tube bundle;
FIG. 3 is a schematic diagram of the configuration of an internal tube-bundle isothermal shift reactor of the present invention with an axial annular tube bundle;
FIG. 4 is a top view of a schematic of the configuration of the inventive inbuilt tube-bundle isothermal shift reactor with axial annular tube bundle of FIG. 3;
FIG. 5 is a schematic diagram of the structure of an axial annular tube bundle of the internal tube-bundle isothermal shift reactor of the present invention.
In the figure, 1 is a boiler water inlet, 2 is a catalyst discharge port, 3 is a refractory, 4 is a pressure-bearing shell, 5 is a catalyst basket, 6 is an axial annular tube bundle, 7 is a central tube, 8 is a catalyst bed layer, 9 is an expansion joint, 10 is a boiler water outlet, 11 is a raw material gas inlet, 12 is a shift gas outlet, 13 is a central tube bundle, and 14 is an annular cylinder; 6-1 is a lower boiler water connecting pipe, 6-2 is a lower annular pipe box, 6-3 is a lower annular pipe plate, 6-4 is a straight pipe, 6-5 is a supporting plate, 6-6 is an end bending pipe, 6-7 is an upper annular pipe plate, 6-8 is an upper annular pipe box, and 6-9 is an upper boiler water connecting pipe.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying examples. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention as set forth in the appended claims. The following examples are, therefore, to be construed in an illustrative and not a restrictive sense.
Example 1:
as shown in fig. 1 and 2, the isothermal shift reactor with the built-in tube bundle comprises a pressure-bearing shell (4), a raw material gas inlet (11), a shift gas outlet (12), a boiler water inlet (1), a boiler water outlet (10) and a catalyst discharge port (2) which are arranged on the pressure-bearing shell (4), and a catalyst basket (5), an axial annular tube bundle (6), a central tube (7), an annular cylinder (14) and a central tube bundle (13) which are arranged in the pressure-bearing shell (4). The axial annular tube bundle (6) is connected with the boiler water outlet (10) through an expansion joint (9) to absorb the thermal expansion deformation difference between the tube bundle and the shell. The catalyst (8) is arranged in the catalyst basket (5), outside the central tube (7) and in the gap of the axial annular tube bundle. The axial annular tube bundle (6) shown in fig. 5 is composed of a boiler water distributor composed of a lower annular tube box (6-2) and a lower annular tube plate (6-3), a boiler water collector composed of an upper annular tube box (6-8) and an upper annular tube plate (6-7), and heat exchange tubes connected to the upper and lower annular tube plates: a straight pipe (6-4) and an end bending pipe (6-6); the boiler water heat exchanger also comprises a lower boiler water connecting pipe (6-1) connected with the boiler water inlet, an upper boiler water connecting pipe (6-9) connected with the boiler water outlet, and a supporting plate (6-5) for supporting and fixing the heat exchange pipe; the upper annular tube plate (6-7) and the lower annular tube plate (6-3) form an annular tube plate.
Raw material gas enters from a raw material gas inlet (11), enters the upper part of a reactor through a tube pass of a central tube bundle (13), is distributed to an annular cavity between a pressure-bearing shell (4) and a catalyst basket (5), enters a catalyst bed layer (8) through a hole array on the catalyst basket (5), performs a conversion reaction under the action of a catalyst, releases heat, most of reaction heat is taken away by boiler water in an axial annular tube bundle (6) uniformly distributed in the bed layer, converted gas with certain temperature rise is converged into the annular cavity between a central tube (7) and an annular cavity cylinder (14) through the hole array of the central tube (7) after reaction, flows upwards to enter a shell pass of the central tube bundle (13) from the upper part of the annular cavity cylinder (14), performs countercurrent heat exchange with low-temperature raw material gas of the tube pass, the temperature of the converted gas is reduced, the temperature of the raw material gas is increased, and the converted gas after heat exchange is cooled flows out from an annular gap between the central tube (7) and a lower tube, leaves the reactor via a shift gas outlet (12). The cooling medium in the axial annular tube bundle heat exchanger can in principle be any cooling fluid, preferably boiler water.
Example 2:
as shown in fig. 3 and 4, an inbuilt tube bundle isothermal shift reactor which removes the central tube bundle (13) heat exchanger within the central tube (7) from the reactor; the raw gas enters from a raw gas inlet (11) at the upper part of the reactor instead, is distributed to an annular cavity between a pressure-bearing shell (4) and a catalyst basket (5), enters a catalyst bed layer (8) through a hole array on the catalyst basket (5), reacts under the action of a catalyst to release heat, most of reaction heat is taken away by boiler water in an axial annular tube bundle (6) uniformly distributed in the bed layer, and the converted gas after the reaction is collected by a central tube (7) and leaves the reactor through a converted gas outlet (12) at the lower part.
In the isothermal shift reactor with the built-in tube bundle of the other embodiment, a central tube bundle (13), which is a gas-gas heat exchanger located in a central tube (7), is moved out of a shift converter, an annular cavity cylinder is removed, the central tube (7) is reserved, an axial annular tube bundle (6) is fully distributed in the whole bed space (except for a reserved overhaul space), reaction heat is completely taken away by cooling fluid in the heat exchange tube, and temperature control is realized by temperature and pressure parameters and flow control of fluid in the tube; the simplified example keeps the high reliability characteristic of the original scheme and simplifies the process flow in the furnace.
It should be understood that the foregoing description is only illustrative of the invention. Various alternatives and modifications can be devised by those skilled in the art without departing from the invention. Accordingly, the present invention is intended to embrace all such alternatives, modifications and variances which fall within the scope of the appended claims.
Claims (3)
1. A built-in tube bundle isothermal shift reactor comprises a pressure-bearing shell (4), and is characterized by also comprising a raw material gas inlet (11), a shift gas outlet (12), a boiler water inlet (1), a boiler water outlet (10) and a catalyst discharge port (2) which are arranged on the pressure-bearing shell (4);
the catalyst basket is characterized by also comprising a catalyst basket (5), an axial annular tube bundle (6), a central tube (7), an annular cavity cylinder (14) and a central tube bundle (13) which are arranged in the pressure-bearing shell (4); the axial annular tube bundle (6) is connected with a boiler water outlet (10) through an expansion joint (9) to absorb the thermal expansion deformation difference between the tube bundle and the pressure-bearing shell (4); the catalyst (8) is arranged inside the catalyst basket (5), outside the central pipe (7) and in a gap formed by the axial annular pipe bundle; the axial annular tube bundle (6) consists of a boiler water distributor, a boiler water collector and heat exchange tubes connected with an upper annular tube plate (6-7) and a lower annular tube plate (6-3); the boiler water distributor consists of a lower annular pipe box (6-2) and a lower annular pipe plate (6-3), the boiler water collector consists of an upper annular pipe box (6-8) and an upper annular pipe plate (6-7), and the heat exchange pipe consists of a straight pipe (6-4) and an end part bent pipe (6-6);
the boiler water heat exchanger also comprises a lower boiler water connecting pipe (6-1) connected with the boiler water inlet, an upper boiler water connecting pipe (6-9) connected with the boiler water outlet, and a supporting plate (6-5) for supporting and fixing the heat exchange pipe;
furthermore, a straight pipe (6-4) and an end bending pipe (6-6) of the heat exchange pipe form a direct connection structure with the upper annular pipe plate (6-7) and the lower annular pipe plate (6-3); the upper annular tube box (6-8) and the lower annular tube box (6-2) adopt a half-tube structure and are directly connected with the tube plate;
furthermore, the upper annular pipe box (6-8) and the lower annular pipe box (6-2) are divided into at least two sections on average;
furthermore, a refractory material (3) is paved between the lower annular tube plate (6-3) and the catalyst bed layer;
furthermore, gaps are reserved on the inner side and the outer side of the axial annular tube bundle (6), namely, tube laying areas are reserved;
furthermore, the central tube bundle (13) is arranged in the central tube (7), and the arrangement mode of the central tube bundle (13) that raw material gas enters and exits from the bottom through a tube pass, conversion gas enters and exits from the top through a shell pass of a gas collecting annular cavity and countercurrent heat exchange is realized through the deflection of a deflection rod is adopted;
the combined structure of gas-liquid heat exchange through the axial annular tube bundle (6) and gas-gas heat exchange through the central tube bundle is adopted; the raw material gas enters the top of the reactor through a central tube bundle (13) and is redistributed to the annular space of the catalyst basket (5), and then enters the radial flow structure of the catalyst bed layer and the cold wall structure of the high-temperature change gas after the contact reaction of the pressure-bearing shell (4) along the radial direction through the hole array of the catalyst basket (5).
2. The isothermal shift reactor with built-in tube bundle according to claim 1, wherein the upper annular tube box (6-8) and the lower annular tube box (6-2) are divided into three sections.
3. The isothermal shift reactor with built-in tube bundle according to claim 1, wherein the high temperature zone of the bed layer is entirely free of welded joints.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410455211.4A CN105457563B (en) | 2014-09-09 | 2014-09-09 | Isothermal shift reactor with built-in tube bundle |
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| CN201410455211.4A CN105457563B (en) | 2014-09-09 | 2014-09-09 | Isothermal shift reactor with built-in tube bundle |
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| CN105457563A CN105457563A (en) | 2016-04-06 |
| CN105457563B true CN105457563B (en) | 2020-03-13 |
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| CN105903413B (en) * | 2016-06-27 | 2018-07-20 | 南京聚拓化工科技有限公司 | Gas-gas heat exchange type isothermal reactor |
| CN106964301B (en) * | 2017-05-18 | 2023-02-28 | 华陆工程科技有限责任公司 | Novel furnace type reactor with built-in raw material preheating and steam superheating device |
| CN107576219B (en) * | 2017-09-06 | 2019-03-15 | 河北科技大学 | A kind of combination tubular sheet heat exchanger with thermal compensation function |
| CN108393044B (en) * | 2018-04-09 | 2023-10-27 | 南京聚拓化工科技有限公司 | Combined heat exchange radial methanol reactor and methanol synthesis process |
| CN108421505B (en) * | 2018-05-22 | 2024-04-12 | 中石化宁波工程有限公司 | Radial-axial combined reactor suitable for strong exothermic reaction |
| CN108421506B (en) * | 2018-05-22 | 2023-11-28 | 中石化宁波工程有限公司 | Energy-saving radial reactor suitable for strong exothermic reaction |
| CN108404821B (en) * | 2018-05-22 | 2024-03-22 | 中石化宁波工程有限公司 | Energy-saving efficient radial methanol reactor |
| CN108499492B (en) * | 2018-05-31 | 2023-07-14 | 南京聚拓化工科技有限公司 | Three-bed five-section detachable ammonia synthesis reactor and reduction method of catalyst |
| CN108774113B (en) * | 2018-06-20 | 2020-06-02 | 北京化工大学 | Bisphenol A production device and production method thereof |
| CN110681318A (en) * | 2018-07-06 | 2020-01-14 | 中国科学院大连化学物理研究所 | Axial flow fixed bed reactor with built-in modular heat collector |
| CN109054908B (en) * | 2018-09-30 | 2020-09-08 | 中石化宁波工程有限公司 | Isothermal transformation process matched with pulverized coal gasification |
| CN109279573B (en) * | 2018-09-30 | 2022-03-22 | 中石化宁波工程有限公司 | Isothermal transformation process matched with coal water slurry gasification |
| US10478794B1 (en) | 2019-02-26 | 2019-11-19 | Chevron Phillips Chemical Company Lp | Bi-modal radial flow reactor |
| CN110327847B (en) * | 2019-08-07 | 2024-01-26 | 华东理工大学 | Radial flow heat exchange type fixed bed catalytic reactor |
| CN110790225A (en) * | 2019-10-24 | 2020-02-14 | 中石化宁波工程有限公司 | Isothermal converter with double cooling systems |
| CN110876913A (en) * | 2019-11-05 | 2020-03-13 | 中国石油化工股份有限公司 | Radial bed isothermal transformation reaction device |
| CN113813882A (en) * | 2020-06-18 | 2021-12-21 | 南京聚拓化工科技有限公司 | Gas distribution piece and reactor |
| CN112221434A (en) * | 2020-09-27 | 2021-01-15 | 李忠 | Catalytic reactor utilizing self-heat-carrying and reaction heat of high-temperature raw material gas |
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| CN1023995C (en) * | 1991-12-03 | 1994-03-16 | 中国石油化工总公司 | Two-section radial parallel heat exchanging type ammonia synthetic tower |
| CN201253565Y (en) * | 2008-09-16 | 2009-06-10 | 庞玉学 | Outer cold type synthesis converter |
| CN101703910B (en) * | 2009-08-20 | 2012-10-17 | 上海国际化建工程咨询公司 | Built-in cold wall type shift reactor for heat exchanger and direction connection structure for shift reactor and downstream heat exchanging equipment |
| CN102580626B (en) * | 2012-03-20 | 2013-10-02 | 南京国昌化工科技有限公司 | Double-shaft radial flow reactor |
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| CN203227477U (en) * | 2013-04-09 | 2013-10-09 | 上海国际化建工程咨询公司 | Constant-temperature fixed-bed reactor for filling catalysts among heat exchange tubes |
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| US5545382A (en) * | 1994-11-25 | 1996-08-13 | Uop | Process and apparatus for discharging particles and fluids from flow channels |
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