Temperature control shift converter

Abstract

The invention is suitable for the technical field of chemical equipment, and provides a temperature control shift converter which comprises a cylindrical shell, two end seal heads and an annular gas conveying pipe, first pipe plates, connecting pipes, second pipe plates and the annular seal heads are fixedly installed at the two ends of the cylindrical shell in sequence, heat exchange pipe bundle assemblies penetrate through the first pipe plates, and the two heat exchange pipe bundle assemblies are arranged in a staggered mode; the outer side of the heat exchange tube bundle assembly is wrapped by a gas distributor, and a water outlet pipe penetrating through the end sealing head is fixed to the annular sealing head. The two symmetrically-arranged heat exchange tube bundle assemblies are installed in the cylindrical shell, cooling water used for cooling can be input from the two ends of the cylindrical shell at the same time, a catalyst arranged in the reactor in the flowing direction of the cooling water in the heat exchange tubes does not exist in a tail reaction section, heat released in the reaction process can be fully absorbed, and the heat exchange efficiency is improved. The condition that the shift catalyst at the local overtemperature part is burnt out due to local overtemperature of the reactor is effectively avoided, and the service life of the catalyst is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical equipment, and more specifically, to a temperature-controlled conversion furnace. Background Art

[0002] In the field of chemical production, the temperature-controlled shift furnace is an important equipment for gas shift reactions, especially in processes such as synthetic ammonia and hydrogen production. The performance of the temperature-controlled shift furnace directly affects the reaction efficiency, product quality and the service life of the catalyst.

[0003] Traditional temperature-controlled conversion furnaces usually control the temperature by inputting cooling water into the heat exchange tubes in a single direction. However, this design has significant limitations. Due to the large volume of the temperature-controlled conversion furnace, the length of a single heat exchange tube is long, and in order to improve the heat exchange efficiency, the heat exchange tubes are usually designed to be thinner and have a smaller cross-section. This results in a limited cooling water flow rate through the heat exchange tube per unit time without additional pressure. When the cooling water that has just been introduced has not yet passed through a heat exchange tube, the heat it absorbs has reached the upper limit, and the cooling water becomes saturated medium-pressure steam, and the specific heat capacity of saturated medium-pressure steam is small. As the reaction continues to release heat, the saturated medium-pressure steam in a single heat exchange tube quickly becomes superheated medium-pressure steam, but the heat absorbed in this process is very small, and the heat generated by the conversion reaction cannot be effectively removed.

[0004] Therefore, local overheating will occur inside the reactor, especially at the tail end of the cooling medium flow direction in the heat exchange tube, which can easily burn out the conversion catalyst at the local overheating point, causing catalyst failure and affecting production efficiency and product quality. Summary of the invention

[0005] In view of the shortcomings of the prior art, the object of the present invention is to provide a temperature-controlled conversion furnace that can be fed with cooling water at both ends to improve the heat exchange efficiency and avoid local overheating inside the reactor.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention discloses a temperature-controlled conversion furnace, comprising a cylindrical shell, two end heads, and an annular gas transmission pipe. Tube sheet one, connecting pipe, tube sheet two, and annular head are fixedly installed in sequence at both ends of the cylindrical shell along the axial direction of the cylindrical shell. Heat exchange tube bundle assemblies fixedly connected to tube sheet one are penetrated through the two tube sheets one. The two heat exchange tube bundle assemblies are arranged alternately. The outer side of the heat exchange tube bundle assembly is wrapped by a cylindrical gas distributor. A water outlet pipe connected to the inner cavity of the annular head and with the water outlet end penetrating the end head is fixed on the annular head.

[0007] The heat exchange tube bundle assembly includes a water inlet pipe, a water balancing cylinder, a water branch pipe, and a water guide ring. There are several water guide rings that are arranged concentrically. The several water guide rings are connected to the water balancing cylinder through water branch pipes that are equidistantly installed on the water balancing cylinder in a circular shape. Several parallel heat exchange tubes are equidistantly installed on each water guide ring. A "J"-shaped elbow is installed at the bottom of each heat exchange tube. A gas collection pipe runs through the axis of the water balancing cylinder. The "X"-shaped elbow penetrates the tube sheet 1 and the tube sheet 2 at the other end of the cylindrical shell and is fixedly connected to the tube sheet 2.

[0008] As a preferred technical solution of the present invention, the water inlet pipe is fixed on the outer circular surface of the water balancing cylinder and is connected with the inner cavity of the water balancing cylinder. The end of the water inlet pipe away from the water balancing cylinder passes through the connecting pipe and extends to the outside of the connecting pipe. A tube hole one is provided on one of the two tube sheets to cooperate with the heat exchange tube and the "J"-shaped bend pipe. A tube hole two is provided on two of the two tube sheets to cooperate with the outlet end of the "J"-shaped bend pipe. The output end of each "J"-shaped bend pipe is inserted into the corresponding tube hole two on the second tube sheet.

[0009] As a preferred technical solution of the present invention, the output ends of the several X-shaped elbows are connected to the inner cavity of the annular head, and the connecting pipe, tube sheet 2, annular head and end head are fixedly connected coaxially by bolts.

[0010] As a preferred technical solution of the present invention, both ends of the gas collecting pipe respectively penetrate tube sheet one and tube sheet two and are fixedly connected to tube sheet one and tube sheet two, the gas collecting pipes in the two heat exchange tube bundle assemblies are coaxially arranged, and the ends of the gas collecting pipes in the two heat exchange tube bundle assemblies close to each other are connected through an expansion joint, the two heat exchange tube bundle assemblies are symmetrically arranged about the expansion joint, and a plurality of gas collecting holes connected to the inner cavity of the gas collecting pipe are provided on an outer circular surface of a section of the gas collecting pipe located inside the gas distributor.

[0011] As a preferred technical solution of the present invention, one end of one of the gas collecting pipes in the two heat exchange tube bundle assemblies located inside the annular head is fixedly connected to a conversion gas exhaust pipe through a flange, and the other end of the gas collecting pipe located inside the annular head is fixedly installed with a sealing plug through bolts, and the gas outlet end of the conversion gas exhaust pipe passes through an annular head and extends to the outside of the annular head.

[0012] As a preferred technical solution of the present invention, the input and output ends of the "X"-shaped elbow are coaxial with the heat exchange tube, and the "X"-shaped elbow is used to bypass the water guide ring on which the heat exchange tube is installed and the water branch pipe connected to the water equalizing cylinder.

[0013] As a preferred technical solution of the present invention, the gaps between the gas distributor and each heat exchange tube are filled with a catalyst, and the gas distributor is composed of several short gas distribution tubes of the same structure connected by bolts, and the short gas distribution tubes are provided with circular air holes that penetrate the short gas distribution tubes.

[0014] As a preferred technical solution of the present invention, positioning rings cooperating with the gas distributor are fixed on the opposite surfaces of the two tube sheets, and the positioning rings are coaxially arranged with the tube sheet and the gas distributor.

[0015] As a preferred technical solution of the present invention, the annular air delivery pipe includes a hollow guide ring coaxial with the cylindrical shell, an air guide pipe connected to the inner cavity of the hollow guide ring is fixed on the hollow guide ring along the tangential direction, a plurality of air distribution pipes connected to the inner cavity of the hollow guide ring are fixedly installed radially on the inner ring surface of the hollow guide ring, and an air intake distribution pipe connected to the inner cavity of the cylindrical shell and fixedly connected to the air distribution pipe by bolts is fixed on the outer circular surface of the cylindrical shell.

[0016] The advantages of the present invention are: 1. The present invention installs two symmetrically arranged heat exchange tube bundle assemblies inside the cylindrical shell, so that cooling water for cooling can be input simultaneously from both ends of the cylindrical shell, so that the catalyst arranged along the flow direction of the cooling water in the heat exchange tube inside the reactor does not have a tail reaction section. The two groups of symmetrically staggered heat exchange tube bundle assemblies can fully absorb the heat released during the reaction, effectively avoiding the situation where the conversion catalyst at the local over-temperature is burned out due to local over-temperature of the reactor, thereby extending the service life of the catalyst.

[0017] 2. The present invention can further increase the contact area between the heat exchange tube and the catalyst by symmetrically installing two groups of heat exchange tube bundle assemblies in a cylindrical shell filled with catalyst, which not only makes the heat exchange area per unit catalyst uniform, but also increases the heat exchange area between the unit catalyst and the heat exchange tube, thereby avoiding the situation where the inner circle catalyst and the outlet temperature are high due to the reduction of the heat exchange area of ​​the inner circle, thereby affecting the service life of the catalyst, thereby ensuring the service life of the catalyst. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the temperature-controlled conversion furnace of the present invention.

[0019] Figure 2 It is a structural schematic diagram of another viewing angle of the present invention.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the temperature-controlled conversion furnace of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the tube sheet 1, the gas distributor and the heat exchange tube bundle assembly of the present invention.

[0022] Figure 5 for Figure 4 main view.

[0023] Figure 6 The present invention is a schematic diagram of the structure in which the first tube sheet, the second tube sheet, the heat exchange tube bundle assembly and the expansion joint cooperate with each other.

[0024] Figure 7 for Figure 6 Front view from bottom perspective.

[0025] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure at AA in the middle.

[0026] Fig. 9 It is a structural schematic diagram of two groups of heat exchange tube bundle assemblies matched with sealing plugs and expansion joints.

[0027] Fig.10 It is a schematic structural diagram of the heat exchange tube bundle assembly of the present invention.

[0028] Fig.11 This is a schematic structural diagram of the heat exchange tube bundle assembly of the present invention from another perspective.

[0029] Fig.12 for Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.

[0030] Fig.13 for Figure 3 Schematic diagram of the local enlarged structure at point B in the middle.

[0031] Fig.14 It is a schematic diagram of the structure of the gas distributor of the present invention.

[0032] Fig.15 Schematic diagram of the heat absorption changes of cooling water flowing in the heat exchange tube.

[0033] In the attached figure: 1, cylindrical shell; 2, end cap; 3, annular gas transmission pipe; 4, tube sheet 1; 5, connecting pipe; 6, tube sheet 2; 7, annular cap; 8. Heat exchange tube bundle assembly; 801. Water inlet pipe; 802. Water equalizing cylinder; 803. Water branch pipe; 804. Water guide ring; 805. Heat exchange tube; 806. I-shaped elbow; 807. Gas collecting pipe; 9. Gas distributor; 10. Water outlet pipe; 11. Conversion gas discharge pipe; 12. Sealing plug; 13. Expansion joint. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail by way of example with reference to the accompanying drawings in the following paragraphs. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0035] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] Example 1: Please refer to Figure 1-Figure 15 Structural schematic diagram, the present invention provides the following technical solutions: Specifically, it refers to a temperature-controlled conversion furnace, including a cylindrical shell 1, two end heads 2, and an annular gas transmission pipe 3. Through holes cooperating with the conversion gas exhaust pipe 11 are opened on the two end heads 2. Tube sheets 1 4, connecting pipes 5, tube sheets 2 6, and annular heads 7 are fixedly installed in sequence at both ends of the cylindrical shell 1 along the axial direction of the cylindrical shell 1. Heat exchange tube bundle assemblies 8 fixedly connected to the tube sheets 1 4 are penetrated by the two tube sheets 1 4. Positioning rings cooperating with the gas distributor 9 are fixed on the opposite surfaces of the two tube sheets 1 4. The positioning rings are coaxially arranged with the tube sheets 1 4 and the gas distributor 9. The two heat exchange tube bundle assemblies 8 are staggered. The outer side of the heat exchange tube bundle assembly 8 is wrapped by a cylindrical gas distributor 9. Catalysts are filled in the gaps between the gas distributor 9 and each heat exchange tube 805. A water outlet pipe 10 connected with the inner cavity of the annular head 7 and having its water outlet end penetrated through the end head 2 is fixed on the annular head 7. In actual use, multiple water outlet pipes 10 can be provided to facilitate the discharge of steam and cooling water.

[0038] The cavity between the upper surface of tube sheet 1 4, the lower surface of tube sheet 2 6 and the connecting tube 5 forms an installation cavity for installing the water inlet pipe 801, the water distribution cylinder 802, the water distribution branch pipe 803 and the water guide ring 804 in the heat exchange tube bundle assembly 8. The opposite surfaces of tube sheet 1 4 and tube sheet 2 6 and the inner wall of the connecting tube 5 are provided with a heat insulation layer to reduce the heat transferred from the reaction inside the cylindrical shell 1 to the installation cavity.

[0039] The heat exchange tube bundle assembly 8 includes a water inlet pipe 801, a water balancing cylinder 802, a water branch pipe 803, and a water guide ring 804. The bottom of the water balancing cylinder 802 is concave inwardly concave, which is conducive to the discharge of cooling water input into the water balancing cylinder 802. There are several water guide rings 804 and they are arranged concentrically. The several water guide rings 804 are connected to the water balancing cylinder 802 through the water branch pipes 803 installed on the water balancing cylinder 802 in an annular shape and at equal distances. Each water guide ring 804 is evenly and evenly installed with a plurality of heat exchange tubes 801 arranged in parallel. 05. A "J"-shaped elbow 806 is installed at the bottom of each heat exchange tube 805. The input and output ends of the "J"-shaped elbow 806 are coaxial with the heat exchange tube 805. The "J"-shaped elbow 806 is used to bypass the water guide ring 804 on which the heat exchange tube 805 is installed and the water branch pipe 803 connected to the water equalizing cylinder 802. A gas collecting pipe 807 passes through the axis of the water equalizing cylinder 802. The "J"-shaped elbow 806 passes through the tube sheet 1 4 and the tube sheet 2 6 at the other end of the cylindrical shell 1 and is fixedly connected to the tube sheet 2 6.

[0040] The two ends of the gas collecting pipe 807 respectively pass through the tube sheet 1 4 and the tube sheet 2 6 and are fixedly connected to the tube sheet 1 4 and the tube sheet 2 6. The gas collecting pipes 807 in the two heat exchange tube bundle assemblies 8 are coaxially arranged, and the ends of the gas collecting pipes 807 in the two heat exchange tube bundle assemblies 8 that are close to each other are connected through an expansion joint 13. The two heat exchange tube bundle assemblies 8 are symmetrically arranged about the expansion joint 13. A plurality of gas collecting holes connected to the inner cavity of the gas collecting pipe 807 are opened on an outer circular surface of a section of the gas collecting pipe 807 located inside the gas distributor 9. A 10cm-15cm height area is left inside the gas distributor 9 and below the gas collecting pipe 807 close to the tube sheet 1 4 without openings.

[0041] The water inlet pipe 801 is fixed on the outer cylindrical surface of the water balancing cylinder 802 and is connected with the inner cavity of the water balancing cylinder 802. The end of the water inlet pipe 801 away from the water balancing cylinder 802 passes through the connecting pipe 5 and extends to the outside of the connecting pipe 5. The two tube sheets 1 4 are provided with a tube hole 1 that matches the heat exchange tube 805 and the I-shaped elbow 806. The two tube sheets 2 6 are provided with a tube hole 2 that matches the outlet end of the I-shaped elbow 806. The output end of each I-shaped elbow 806 is inserted into the corresponding tube hole 2 on the tube sheet 2 6. The output end of the I-shaped elbow 806 is connected with the inner cavity of the annular head 7. The connecting pipe 5, the tube sheet 2 6, the annular head 7, and the end head 2 are fixedly connected coaxially by bolts.

[0042] One end of one of the gas collecting pipes 807 in the two heat exchange tube bundle assemblies 8 located inside the annular head 7 is fixedly connected to the conversion gas discharge pipe 11 through a flange, and one end of the other gas collecting pipe 807 located inside the annular head 7 is fixedly installed with a sealing plug 12 through bolts. The gas outlet end of the conversion gas discharge pipe 11 passes through an annular head 7 and extends to the outside of the annular head 7. The sealing plug 12 blocks one of the gas collecting pipes 807, so that the conversion gas is discharged from the gas collecting pipe 807 installed with the conversion gas discharge pipe 11. When it is needed to generate gas discharged from the bottom (when a different catalyst needs to be replaced, the temperature-controlled conversion furnace can be opened, the original catalyst can be taken out, and the required catalyst can be replaced), the gas discharge pipe 11 can be changed, the sealing plug 12 can be removed, and the positional relationship between the two can be exchanged to achieve further changes to the temperature-controlled conversion furnace and expand the scope of use of the temperature-controlled conversion furnace.

[0043] The existing temperature-controlled conversion furnace is prone to burn out the catalyst due to excessive local temperature during use. The reason is that the heat exchange tube 805 in the existing temperature-controlled conversion furnace is arranged in one direction, and cooling water is input into the heat exchange tube 805 in one direction. The furnace body of the temperature-controlled conversion furnace is relatively large, resulting in a long length of a single heat exchange tube 805 (and because of the existing settings to improve the heat exchange efficiency, the single heat exchange tube 805 is designed to be relatively thin and has a small cross-section. Without additional pressure, the maximum amount of cooling water passing through per unit time is constant). Fig.15 As shown, the cooling water just introduced has not yet passed through one heat exchange tube 805, and the absorbed heat has reached the upper limit. The cooling water in the heat exchange tube 805 becomes saturated medium-pressure steam, and the specific heat of saturated medium-pressure steam is very small. As the reaction continues to release heat, the saturated medium-pressure steam in the single heat exchange tube 805 quickly becomes superheated medium-pressure steam, and the heat absorbed is very small, which cannot effectively remove the heat of the conversion reaction, resulting in the cooling medium in the single heat exchange tube 805 absorbing very little heat in the entire second half, which will definitely cause local overheating of the reactor (the part at the end of the cooling medium flow direction in the heat exchange tube 805), and burn the conversion catalyst at the local overheating location.

[0044] The present application arranges two groups of symmetrically staggered heat exchange tube bundle assemblies 8, so that cooling water for cooling can be simultaneously input from both ends of the cylindrical shell 1, so that the catalyst arranged along the flow direction of cooling water in the heat exchange tube 805 inside the reactor does not have a tail reaction section. The two groups of symmetrically staggered heat exchange tube bundle assemblies 8 can fully absorb the heat released during the reaction process, effectively avoiding the situation where the conversion catalyst at the local overheating is burned out due to local overheating of the reactor, thereby extending the service life of the catalyst.

[0045] In addition, the two groups of symmetrically staggered heat exchange tube bundle assemblies 8 further increase the contact area between the heat exchange tube 805 and the catalyst, making the heat exchange area per unit catalyst uniform, avoiding the situation where the inner circle catalyst and the outlet temperature are high due to the reduction of the heat exchange area in the inner circle, thereby affecting the service life of the catalyst, thereby ensuring the service life of the catalyst.

[0046] Embodiment 2: Based on the specific embodiment 1, the difference of this embodiment is that: like Figure 3 , Figure 4 , Fig. 9 As shown, the gas distributor 9 is composed of several sections of short gas distribution tubes with the same structure connected by bolts. The segmented bolt detachable connection design of the gas distributor 9 can effectively improve the loading and unloading and replacement efficiency of the catalyst and reduce the maintenance cost and time. A circular air hole running through the short gas distribution tube is provided on the short gas distribution tube. The short gas distribution tube is formed by two semi-cylinders fixed together by bolts to form a cylindrical cylinder. The semi-cylinder cylinder wall has a double layer, and a gas buffer cavity is arranged between the inner cylinder wall and the outer cylinder wall. The gas buffer cavity can decelerate the input airflow, so that the reaction gas is more uniform after being output through the circular air hole, and can react more comprehensively with the catalyst wrapped by the gas distributor 9 to avoid concentrated reaction causing excessive local temperature. The circular air holes are opened on the inner cylinder wall and the outer cylinder wall for connecting the gas buffer cavity. The aperture density of the circular air holes opened on the inner cylinder wall is greater than the aperture density of the circular air holes opened on the outer cylinder wall, and the aperture of the circular air holes is not greater than 5mm, so that the gas output for the reaction escapes more uniformly and smoothly. The two adjacent short gas distribution tubes are fixed into a whole by bolts and connecting plates. The height of the positioning ring is between 10 cm and 15 cm to prevent the catalyst from settling and causing short circuit of the reaction gas. It is also used to position the installed gas distributor 9 to ensure installation accuracy.

[0047] Embodiment 3: Based on the specific embodiment 2, the difference of this embodiment is that: like Figure 1-Figure 3 As shown, the annular gas delivery pipe 3 includes a hollow guide ring coaxial with the cylindrical shell 1, a gas guide pipe connected to the inner cavity of the hollow guide ring is fixed on the hollow guide ring along the tangential direction, a plurality of gas distribution pipes connected to the inner cavity of the hollow guide ring are fixedly installed radially on the inner ring surface of the hollow guide ring, and an air inlet distribution pipe connected to the inner cavity of the cylindrical shell 1 and fixedly connected to the gas distribution pipe by bolts is fixed on the outer circumference of the cylindrical shell 1. The annular gas delivery pipe 3 allows the input reaction gas to be input into the cylindrical shell 1 from different angles, and then the gas input into the gas distributor 9 is more uniform, which is conducive to the gas distributor 9 to input the reaction gas more uniformly into the catalyst part, reduce the pressure of the reaction gas output by the gas distributor 9, and ensure the smooth progress of the reaction.

[0048] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A temperature-controlled conversion furnace, comprising a cylindrical shell (1), two end caps (2), and an annular gas transmission pipe (3), characterized in that: Tube sheet one (4), a connecting pipe (5), tube sheet two (6), and an annular head (7) are fixedly installed in sequence at both ends of the cylindrical shell (1) along the axial direction of the cylindrical shell (1); a heat exchange tube bundle assembly (8) fixedly connected to the tube sheet one (4) is passed through each of the two tube sheets one (4); the two heat exchange tube bundle assemblies (8) are arranged alternately; the outer side of the heat exchange tube bundle assembly (8) is wrapped by a cylindrical gas distributor (9); a water outlet pipe (10) is fixed on the annular head (7), the water outlet end of the water outlet pipe being connected to the inner cavity of the annular head (7) passing through the end head (2); The heat exchange tube bundle assembly (8) comprises a water inlet pipe (801), a water balancing cylinder (802), a water branch pipe (803), and a water guide ring (804). There are a plurality of water guide rings (804) which are arranged concentrically. The plurality of water guide rings (804) are connected to the water balancing cylinder (802) through water branch pipes (803) which are equidistantly installed on the water balancing cylinder (802) in a circular shape. A plurality of heat exchange tubes (805) which are equidistantly installed in parallel are installed on each water guide ring (804). A "J"-shaped elbow pipe (806) is installed at the bottom end of each heat exchange tube (805). A gas collection pipe (807) passes through the axis of the water balancing cylinder (802). The gas collecting pipes (807) in the two heat exchange tube bundle assemblies (8) are coaxially arranged, and the gas collecting pipes (807) in the two heat exchange tube bundle assemblies (8) close to each other are connected via an expansion joint (13), and the two heat exchange tube bundle assemblies (8) are symmetrically arranged about the expansion joint (13); The "X"-shaped bent pipe (806) penetrates tube sheet one (4) and tube sheet two (6) at the other end of the cylindrical shell (1) and is fixedly connected to tube sheet two (6).

2. A temperature-controlled conversion furnace according to claim 1, characterized in that: The water inlet pipe (801) is fixed on the outer cylindrical surface of the water balancing cylinder (802) and is connected to the inner cavity of the water balancing cylinder (802). One end of the water inlet pipe (801) away from the water balancing cylinder (802) passes through the connecting pipe (5) and extends to the outside of the connecting pipe (5). A tube hole one cooperating with the heat exchange tube (805) and the "J"-shaped bend pipe (806) is opened on the two tube sheets (4). A tube hole two cooperating with the outlet end of the "J"-shaped bend pipe (806) is opened on the two tube sheets (6). The output end of each "J"-shaped bend pipe (806) is inserted into the corresponding tube hole two on the tube sheet (6).

3. A temperature-controlled conversion furnace according to claim 2, characterized in that: The output ends of the plurality of X-shaped bent pipes (806) are in communication with the inner cavity of the annular head (7), and the connecting pipe (5), the second tube sheet (6), the annular head (7), and the end head (2) are coaxially fixedly connected by bolts.

4. A temperature-controlled conversion furnace according to claim 1, characterized in that: The two ends of the gas collection pipe (807) respectively penetrate tube sheet one (4) and tube sheet two (6) and are fixedly connected to tube sheet one (4) and tube sheet two (6). A plurality of gas collection holes communicating with the inner cavity of the gas collection pipe (807) are provided on an outer circumferential surface of a section of the gas collection pipe (807) located inside the gas distributor (9).

5. A temperature-controlled conversion furnace according to claim 1, characterized in that: One end of one of the gas collecting pipes (807) in the two heat exchange tube bundle assemblies (8) located inside the annular head (7) is fixedly connected to a conversion gas discharge pipe (11) via a flange, and one end of the other gas collecting pipe (807) located inside the annular head (7) is fixedly installed with a sealing plug (12) via bolts; The gas outlet end of the conversion gas outlet pipe (11) penetrates an annular seal head (7) and extends to the outside of the annular seal head (7).

6. A temperature-controlled conversion furnace according to claim 3, characterized in that: The input end and the output end of the "X"-shaped elbow (806) are both coaxial with the heat exchange tube (805), and the "X"-shaped elbow (806) is used to bypass the water guide ring (804) on which the heat exchange tube (805) is installed and the water distribution branch pipe (803) connected to the water equalizing cylinder (802).

7. The temperature-controlled conversion furnace according to claim 1, characterized in that: The gaps between the gas distributor (9) and the heat exchange tubes (805) are filled with a catalyst. The gas distributor (9) is composed of several short gas distribution tubes of the same structure connected by bolts. The short gas distribution tubes are provided with circular air holes that penetrate the short gas distribution tubes.

8. The temperature-controlled conversion furnace according to claim 1, characterized in that: Positioning rings cooperating with the gas distributor (9) are fixed on the opposite surfaces of the two tube sheets (4), and the positioning rings are coaxially arranged with the tube sheet (4) and the gas distributor (9).

9. The temperature-controlled conversion furnace according to claim 1, characterized in that: The annular gas delivery pipe (3) comprises a hollow guide ring coaxial with the cylindrical shell (1); an air guide pipe connected to the inner cavity of the hollow guide ring is fixed on the hollow guide ring along the tangential direction; a plurality of air distribution pipes connected to the inner cavity of the hollow guide ring are fixedly installed radially on the inner ring surface of the hollow guide ring; and an air intake distribution pipe connected to the inner cavity of the cylindrical shell (1) and fixedly connected to the air distribution pipe by bolts is fixed on the outer ring surface of the cylindrical shell (1).

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