Purification device for gas deoxidation

Abstract

The utility model provides a purification device for gas deoxidation, which belongs to the technical field of chemical equipment and comprises a deoxidizer, a heat exchanger, a gas distributor and a powder collecting tank. The deaerator comprises a deaerator cylinder, and a raw material gas inlet pipe and a raw material gas outlet pipe are arranged at the bottom of the deaerator cylinder; the heat exchanger comprises a built-in heat exchanger and a central heat exchange tube connected to the built-in heat exchanger; the built-in heat exchanger is communicated with a feed gas inlet pipe; the central heat exchange tube is communicated with the built-in heat exchanger; the gas distributor comprises a sieve plate distributor and a cone distributor, and the sieve plate distributor is positioned above the cone distributor; the powder collecting tank is connected to the central heat exchange tube and is connected to the small end of the cone distributor; and a powder discharging pipe is arranged at the bottom of the powder collecting tank. According to the device, raw material gas can be uniformly distributed, the retention time of the raw material gas and the contact time of the raw material gas and a deoxidizing agent are prolonged, bias flow of the raw material gas is avoided, the deoxidizing effect of the deoxidizing agent is ensured, and the service life of the deoxidizing agent is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and in particular relates to a purification device for gas deoxidation. Background Art

[0002] In the synthetic ammonia process, it is very important to control the oxygen content in the raw gas, otherwise it will directly affect the catalytic effect of the ammonia synthesis catalyst and the service life of the synthesis catalyst. The deoxidation purification device in the synthetic ammonia process mostly adopts the traditional packed tower, and the deoxidizer is directly loaded in the packed tower. This design has many problems such as uneven gas distribution, gas bias, short gas residence time, poor deoxidation effect, and severe deoxidizer pulverization, which makes the service life of the deoxidizer unable to be guaranteed.

[0003] In the prior art, the deoxidizer in the deoxidizer is used for purification. The conventional deoxidizer has unstable reaction temperature, poor deoxidation effect, serious deoxidizer powderization, short service life, frequent shutdown to replace the deoxidizer, which seriously affects the production of synthetic ammonia and produces a large amount of solid hazardous waste, which is difficult to handle and has poor practicality. In view of the many technical difficulties in the current use of deoxidizers, it is urgent to study the purification device for deoxidation of raw gas. Utility Model Content

[0004] The utility model provides a purification device for gas deoxidation, aiming to solve the technical problems existing in the existing process such as uneven gas distribution, gas bias flow, short residence time, poor deoxidation effect and serious deoxidizer pulverization.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a purification device for gas deoxygenation, comprising:

[0006] The deoxidizer comprises a deoxidizer cylinder, wherein a raw gas inlet pipe and a raw gas outlet pipe are arranged at the bottom of the deoxidizer cylinder;

[0007] A heat exchanger is arranged in the deoxidizer cylinder, comprising a built-in heat exchanger and a central heat exchange tube connected to the built-in heat exchanger; the built-in heat exchanger is located at the bottom of the deoxidizer cylinder, and its gas inlet is connected to the raw gas inlet pipe; the central heat exchange tube is located on the central axis of the deoxidizer cylinder, and the gas inlet at the lower end is connected to the gas outlet at the top of the built-in heat exchanger, and the gas outlet at the upper end is located in the head at the top of the deoxidizer cylinder;

[0008] A gas distributor is arranged in the deoxidizer cylinder, comprising a sieve plate distributor and a cone distributor, wherein the sieve plate distributor is located above the cone distributor, the central heat exchange pipe passes through the sieve plate distributor and the cone distributor, and the sieve plate distributor is evenly distributed with sieve holes; the cone distributor is provided with distribution holes; and

[0009] A powder collecting tank is connected to the central heat exchange tube and to the small end of the cone distributor; a powder discharge pipe is arranged at the bottom of the powder collecting tank, and the powder discharge pipe extends to the outside of the deoxidizer cylinder.

[0010] In one feasible manner, the heat exchanger further includes a plurality of temperature-controlled heat exchange tubes evenly distributed along the outer circumference of the central heat exchange tube, the side gas inlet of the temperature-controlled heat exchange tube being connected to the raw gas inlet pipe through an annular air inlet pipe, and the upper gas outlet of the temperature-controlled heat exchange tube being flush with the upper gas outlet of the central heat exchange tube.

[0011] In one achievable manner, the central heat exchange tube is a hollow cross-shaped cylinder.

[0012] In one achievable manner, the outer surface of the central heat exchange tube is wrapped with a corrugated plate from bottom to top.

[0013] In one feasible manner, the cone distributor includes a regular cone distributor and an inverted cone distributor, the small end of the regular cone distributor is fixed to the central heat exchange tube, the large end of the inverted cone distributor is fixed to the inner wall of the deoxidizer cylinder, and the powder collecting trough is fixed to the small end of the inverted cone distributor.

[0014] In one achievable manner, a plurality of the forward cone distributors and the inverted cone distributors are alternately distributed from top to bottom in the deaerator cylinder.

[0015] In a feasible manner, the shortest distance from the large end edge of the regular cone distributor to the inner wall of the deoxidizer cylinder is 10±5 mm.

[0016] In one achievable manner, the included angle a between the edge line of the conical distributor and the inner wall of the deoxidizer cylinder is 45°.

[0017] In one achievable manner, the distribution holes on the conical distributor are distributed in a ring shape around the central axis of the deoxidizer cylinder, and the diameters of the distribution holes gradually increase from top to bottom.

[0018] In a feasible manner, three layers of the sieve plate distributors are arranged on the top of the deaerator cylinder, and the distance between two adjacent layers of the sieve plate distributors is 20±5 cm.

[0019] Compared with the prior art, the purification device for gas deoxidation provided by the utility model has the following beneficial effects: (1) after the raw gas enters the built-in heat exchanger from the gas inlet at the bottom of the built-in heat exchanger, the high-temperature raw gas after deoxidation is heated once, and then enters the central heat exchange tube from the gas inlet at the bottom of the central heat exchange tube along the gas outlet at the top of the built-in heat exchanger for secondary heating, and then overflows along the top of the central heat exchange tube into the deoxidizer; the temperature of the raw gas after the two heatings is close to the catalytic reaction temperature of the deoxidizer, thereby avoiding the problem that the newly input low-temperature raw gas affects the working temperature of the entire deoxidizer, thereby affecting the deoxidation effect of the deoxidizer. Therefore, the present application utilizes the built-in heat exchanger to recycle the reaction heat released during the deoxidation catalytic reaction, which can ensure the stability of the deoxidizer raw gas inlet temperature, prolong the residence time of the gas, ensure the catalytic reaction of the deoxidizer, and thus improve the deoxidation effect.

[0020] (2) The raw gas entering from the central heat exchange tube converges at the top head of the deoxidizer cylinder, and then passes through the sieve plate distributor from top to bottom. After being buffered and distributed once by the sieve holes on the surface of the sieve plate distributor, it contacts the deoxidizer filled between the outer wall of the central heat exchange tube and the inner wall of the deoxidizer cylinder. The raw gas is buffered and distributed twice through the distribution holes on the surface of the cone distributor to ensure uniform radial flow of the raw gas in the deoxidizer bed. The sieve plate distributor can make the raw gas distribution more uniform, avoiding the direct impact of the raw gas on the deoxidizer, thereby avoiding the occurrence of deoxidizer pulverization problem.

[0021] (3) The use of a cone distributor can make the raw gas evenly distributed radially in the deoxidizer cylinder, thereby avoiding the problem of raw gas deviation, greatly prolonging the contact time between the raw gas and the deoxidizer, ensuring the deoxidation effect of the raw gas, and thus prolonging the service life of the deoxidizer.

[0022] (4) The pulverized deoxidizer powder also moves radially from top to bottom along with the flow direction of the raw gas, and is finally enriched in the powder collection tank. The deoxidizer powder in the powder collection tank is regularly cleaned through the powder discharge pipe. Therefore, using the powder collection tank to collect the powder generated by the pulverization of the deoxidizer can prevent the deoxidizer powder from adhering to its surface and improve the deoxidation effect of the deoxidizer.

[0023] The purification device for gas deoxidation provided by the utility model can evenly distribute the raw gas, prolong the residence time of the raw gas and the contact time between the raw gas and the deoxidizer, avoid the deviation of the raw gas, ensure the deoxidation effect of the deoxidizer, prolong the service life of the deoxidizer, and solve the technical problems of incomplete deoxidation and purification of the raw gas and short service life of the deoxidation catalyst in chemical production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1A schematic diagram of the main structure of a purification device for gas deoxygenation provided by an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the top view of a purification device for gas deoxygenation provided in an embodiment of the utility model;

[0026] Description of reference numerals:

[0027] 1. Deaerator cylinder; 2. Built-in heat exchanger; 3. Central heat exchange tube; 4. Temperature control heat exchange tube; 5. Sieve plate distributor; 6. Cone distributor; 7. Powder collection tank; 8. Raw gas inlet pipe; 9. Raw gas outlet pipe; 10. Regulating valve; 11. Powder discharge pipe; 12. Powder discharge valve; 13. Branch pipeline; 14. Raw gas inlet valve; 15. Annular inlet pipe; 16. End cap. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] Please also read Figure 1 and Figure 2 , the purification device for gas deoxygenation provided by the utility model is now described. The purification device for gas deoxygenation includes: a deoxidizer, a heat exchanger, a gas distributor and a powder collecting tank 7. The deoxidizer includes a deoxidizer cylinder 1, and a raw gas inlet pipe 8 and a raw gas outlet pipe 9 are provided at the bottom of the deoxidizer cylinder 1, wherein a raw gas inlet valve 14 is provided on the raw gas inlet pipe 8; the heat exchanger is arranged in the deoxidizer cylinder 1, including a built-in heat exchanger 2 and a central heat exchange pipe 3 connected to the built-in heat exchanger 2; the built-in heat exchanger 2 is located at the bottom of the deoxidizer cylinder 1, and its gas inlet is connected to the raw gas inlet pipe 8; the central heat exchange pipe 3 is located on the central axis of the deoxidizer cylinder 1, and the gas inlet at its lower end is connected to the gas outlet at the top of the built-in heat exchanger 2, and its upper end The gas outlet is located in the head 16 at the top of the deoxidizer cylinder 1; the gas distributor is arranged in the deoxidizer cylinder 1, including a sieve plate distributor 5 and a cone distributor 6, the sieve plate distributor 5 is located above the cone distributor 6, the central heat exchange tube 3 passes through the sieve plate distributor 5 and the cone distributor 6, and the sieve plate distributor 5 is evenly distributed with sieve holes; the cone distributor 6 is provided with distribution holes; the powder collecting tank 7 is connected to the central heat exchange tube 3, and is connected to the small end of the cone distributor 6; the bottom of the powder collecting tank 7 is provided with a powder discharge pipe 11, and the powder discharge pipe 11 extends to the outside of the deoxidizer cylinder 1.

[0030] The purification device for gas deoxidation provided by the utility model has the following beneficial effects: (1) after the raw gas enters the built-in heat exchanger 2 from the gas inlet at the bottom of the built-in heat exchanger 2, the high-temperature raw gas after deoxidation is heated once, and then enters the central heat exchange tube 3 from the gas inlet at the bottom of the central heat exchange tube 3 along the gas outlet at the top of the built-in heat exchanger 2 for secondary heating, and then overflows along the top of the central heat exchange tube 3 into the deoxidizer; the temperature of the raw gas after two heatings is close to the catalytic reaction temperature of the deoxidizer, thereby avoiding the problem that the newly input low-temperature raw gas affects the working temperature of the entire deoxidizer, thereby affecting the deoxidation effect of the deoxidizer. Therefore, the present application utilizes the built-in heat exchanger 2 to recycle the reaction heat released during the deoxidation catalytic reaction, which can ensure the stability of the deoxidizer raw gas inlet temperature, prolong the residence time of the gas, ensure the catalytic reaction of the deoxidizer, and thus improve the deoxidation effect.

[0031] (2) The raw gas entering from the central heat exchange tube 3 converges at the top cover 16 of the deoxidizer cylinder 1, and then passes through the sieve plate distributor 5 from top to bottom. After being buffered and distributed once by the sieve holes on the surface of the sieve plate distributor 5, the raw gas contacts the deoxidizer filled between the outer wall of the central heat exchange tube 3 and the inner wall of the deoxidizer cylinder 1. The raw gas is buffered and distributed twice by the distribution holes on the surface of the cone distributor 6 to ensure that the raw gas flows uniformly radially in the deoxidizer bed. The sieve plate distributor 5 can make the raw gas distribution more uniform, avoiding the raw gas directly impacting the deoxidizer, thereby avoiding the problem of deoxidizer pulverization.

[0032] (3) The cone distributor 6 can make the raw gas evenly distributed radially in the deoxidizer cylinder 1, thereby avoiding the problem of raw gas deviation, greatly prolonging the contact time between the raw gas and the deoxidizer, ensuring the deoxidation effect of the raw gas, and thus prolonging the service life of the deoxidizer.

[0033] (4) The pulverized deoxidizer powder also moves radially from top to bottom along the flow direction of the raw gas, and is finally enriched in the powder collecting tank 7. The deoxidizer powder in the powder collecting tank 7 is regularly cleaned through the powder discharge pipe 11. Therefore, by using the powder collecting tank 7 to collect the powder generated by the pulverization of the deoxidizer, the deoxidizer powder can be prevented from adhering to its surface, thereby improving the deoxidation effect of the deoxidizer.

[0034] In some embodiments, Figure 1 and Figure 2As shown, the heat exchanger also includes a plurality of temperature-controlled heat exchange tubes 4 evenly distributed along the outer circumference of the central heat exchange tube 3. The side gas inlet of the temperature-controlled heat exchange tube 4 is connected to the raw gas inlet pipe 8 through the annular inlet pipe 15, and the upper gas outlet of the temperature-controlled heat exchange tube 4 is flush with the upper gas outlet of the central heat exchange tube 3. Through the coordinated action of the temperature-controlled heat exchange tube 4 and the regulating valve 10, the stability of the operating temperature of the deoxidizer can be ensured, the occurrence of local high temperature of the deoxidizer is avoided, and the occurrence of the deoxidizer pulverization problem is further avoided.

[0035] Specifically, the temperature-controlled heat exchange tube 4 is a hollow cylindrical tube, the center distance between the temperature-controlled heat exchange tube 4 and the central heat exchange tube 3 is 50 cm, the distance between the temperature-controlled heat exchange tube 4 and the inner wall of the deoxidizer cylinder 1 is 30 cm, the gas outlet at the top of the temperature-controlled heat exchange tube 4 is connected to the top of the deoxidizer, and the distance from the top head 16 is 30 cm. The temperature-controlled heat exchange tube 4 passes through the cone distributor 6 and the sieve plate distributor 5.

[0036] Furthermore, eight temperature-controlled heat exchange tubes 4 are arranged, which are distributed in a ring shape on the periphery of the central heat exchange tube 3, and two adjacent temperature-controlled heat exchange tubes 4 form an angle of 45°. A regulating valve 10 is provided on the pipeline connecting the side gas inlet of each temperature-controlled heat exchange tube 4 and the raw gas inlet pipe 8. Each temperature-controlled heat exchange tube 4 is connected to the annular inlet pipe 15, and the annular inlet pipe 15 is connected to the raw gas inlet pipe 8.

[0037] The raw gas enters the deoxidizer in two ways, one of which enters the deoxidizer along the central heat exchange tube 3 through the built-in heat exchanger 2, and the other enters the temperature-controlled heat exchange tube 4 along the side gas inlet of the temperature-controlled heat exchange tube 4. The low-temperature gas entering the temperature-controlled heat exchange tube 4 exchanges heat with the high-temperature heat released by the deoxidizer bed, thereby avoiding the occurrence of local overtemperature of the deoxidizer and the occurrence of deoxidizer pulverization problem.

[0038] Taking eight temperature-controlled heat exchange tubes 4 as an example, an annular air inlet pipe 15 is designed on the pipeline connecting the temperature-controlled heat exchange tube 4 and the raw gas inlet pipe 8, and regulating valves 10 are respectively provided on the eight branch pipes 13 connecting the annular air inlet pipe 15 and the temperature-controlled heat exchange tube 4. By adjusting the opening degree of the regulating valve 10 on each branch, the intake flow rate of the low-temperature raw gas entering each branch pipe 13 is controlled, thereby maintaining the temperature balance of each measuring point on the deoxidizer, so that the temperature of the deoxidizer bed is kept stable, and the occurrence of excessive local temperature of the deoxidizer bed is avoided while ensuring sufficient heat exchange effect.

[0039] In some embodiments, Figure 2As shown, the central heat exchange tube 3 is a hollow cross-shaped column. The central heat exchange tube 3 adopts a hollow cross-shaped columnar structure, which can greatly increase the heat exchange area of ​​the heat exchange tube, ensure the stability of the operating temperature of the deoxidizer, avoid the occurrence of local high temperature phenomenon of the deoxidizer, and further avoid the occurrence of the deoxidizer pulverization problem. Among them, the distance between the top of the central heat exchange tube 3 and the head 16 is 30cm. After the raw gas enters the built-in heat exchanger 2 from the gas inlet at the bottom of the built-in heat exchanger 2 along the tube path of the built-in heat exchanger 2, it is heated once by the high-temperature raw gas after deoxidation, and then enters the central heat exchange tube 3 from the gas inlet at the bottom of the central heat exchange tube 3 along the gas outlet at the top of the built-in heat exchanger 2 for secondary heating, and then overflows along the top of the central heat exchange tube 3 into the deoxidizer cylinder 1. The temperature of the raw gas after two heatings is close to the catalytic reaction temperature of the deoxidizer, thereby avoiding the influence of the newly input low-temperature raw gas on the working temperature of the entire deoxidizer, thereby affecting the deoxidation effect of the deoxidizer.

[0040] In some embodiments, the outer surface of the central heat exchange tube 3 is wound with a corrugated plate (not shown) from bottom to top. The center distance between adjacent corrugated plates is 1.0-1.5 cm. The surface is designed as a wound corrugated plate, which can greatly increase the heat exchange area of ​​the heat exchange tube, so that when the raw gas passes through the central heat exchange tube 3, there is enough heat exchange area with the central heat exchange tube 3, and the reaction heat released during the catalytic reaction of the deoxidizer can be fully utilized, creating basic conditions for the local over-high temperature of the deoxidizer.

[0041] In some embodiments, Figure 1 As shown, the cone distributor 6 includes a normal cone distributor 6 and an inverted cone distributor 6. The small end of the normal cone distributor 6 is fixed on the central heat exchange tube 3, the large end of the inverted cone distributor 6 is fixed on the inner wall of the deoxidizer cylinder 1, and the powder collecting tank 7 is fixed on the small end of the inverted cone distributor 6.

[0042] The powder collecting tank 7 is in the shape of a hollow cylinder, surrounding the outer side of the central heat exchange tube 3; the bottom of the powder collecting tank 7 is connected to the outer wall of the central heat exchange tube 3, and the upper edge of the powder collecting tank 7 is connected to the small end of the inverted cone distributor 6. When the deoxidizer is operated under high temperature conditions for a long time, pulverization is inevitable. The deoxidizer powder produced by pulverization enters the powder collecting tank 7 along with the radially moving raw gas. The powder discharge valve 12 on the powder discharge pipe 11 is opened to regularly clean the deoxidizer powder in the powder collecting tank 7, further avoiding the deoxidizer powder adhering to the surface of the deoxidizer, affecting the catalytic effect of the deoxidizer, and further ensuring the deoxidation effect of the raw gas.

[0043] In some embodiments, Figure 1 As shown, a plurality of normal cone distributors 6 and inverted cone distributors 6 are alternately distributed from top to bottom in the deaerator cylinder 1. This embodiment includes two normal cone distributors 6 and two inverted cone distributors 6.

[0044] In some embodiments, Figure 1 As shown, the shortest distance from the large end edge of the normal cone distributor 6 to the inner wall of the deoxidizer cylinder 1 is 10±5 mm. There is a gap between the large end edge of the normal cone distributor 6 and the inverted cone distributor 6.

[0045] In some embodiments, Figure 1 As shown, the included angle a between the edge line of the cone distributor 6 and the inner wall of the deoxidizer cylinder 1 is 45°, and an angle between 45° and 60° may also be selected.

[0046] In some embodiments, Figure 1 As shown, the distribution holes on the cone distributor 6 are distributed in an annular shape with the central axis of the deaerator cylinder 1, and the aperture of the distribution holes increases gradually from top to bottom. The distribution holes on the cone distributor 6 are circular holes, which are distributed in an annular shape on the surface of the cone distributor 6. The aperture of the annular circular holes increases step by step from top to bottom, and the diameters are 10mm, 15mm, 20mm, 25mm..., and the distance between the centers of adjacent circular holes is 22.5mm, 30.0mm, 37.5mm...

[0047] The radially moving raw gas passes through the sieve plate distributor 5, is buffered and distributed once, and then enters the cone distributor 6. It is buffered and distributed twice through the circular holes on the surface of the cone distributor 6, which further avoids the pulverization problem of the deoxidizer. The raw gas is further distributed twice in the deoxidizer bed, which further avoids the problem of raw gas deviation and ensures the deoxidation effect of the raw gas.

[0048] In some embodiments, Figure 1 As shown, a three-layer sieve plate distributor 5 is arranged on the top of the deaerator cylinder 1, and the distance between two adjacent layers of sieve plate distributors 5 is 20±5 cm.

[0049] Specifically, the sieve plate distributor 5 is in a circular shape, surrounding the central heat exchange tube 3, and connected to the inner wall of the deoxidizer cylinder 1 and the outer wall of the central heat exchange tube 3; the sieve plate distributor 5 has three layers, is horizontally fixed to the top of the deoxidizer cylinder 1, and is arranged downward close to the lower edge of the head 16.

[0050] Furthermore, the sieve plate distributor 5 is provided with sieve holes with a diameter of 10 mm. The sieve holes are evenly distributed in a ring shape with the center of the sieve plate distributor 5 as the center. The distance between the centers of adjacent sieve holes is 30 mm. The center of the first annular sieve hole close to the center of the sieve plate distributor 5 is 30 mm away from the outer wall of the central heat exchange tube 3.

[0051] The function of the sieve plate distributor 5 is as follows: the raw gas entering the deoxidizer cylinder 1 from the central heat exchange tube 3 and the raw gas entering the deoxidizer from the self-temperature controlling heat exchange tube 4 merge at the top cover 16 of the deoxidizer and begin to move radially downward, and enter the deoxidizer bed through the sieve holes on the surface of the sieve plate distributor 5. Under the action of the sieve holes, the gas velocity of the raw gas moving radially downward is buffered, avoiding the impact of the high gas velocity of the raw gas moving radially on the surface of the deoxidizer and avoiding the problem of pulverization of the deoxidizer; in addition, under the action of the sieve holes, the raw gas in the deoxidizer bed can also be evenly distributed, avoiding the problem of biased flow of the raw gas, and further laying the foundation for ensuring the deoxidation effect of the deoxidizer.

[0052] Combination Figure 1 It is understood that the use process of the purification device for gas deoxygenation provided by the utility model is as follows: the raw gas transported from the raw gas inlet pipe 8 enters the deoxidizer in two ways: one of the ways enters the tube side of the built-in heat exchanger 2, and uses the high-temperature deoxidized raw gas that is about to be discharged from the deoxidizer at the bottom of the deoxidizer cylinder 1 to perform a primary heat exchange with the low-temperature raw gas in the tube side of the built-in heat exchanger 2; the raw gas heated once enters the central heat exchange tube 3 through the tube side of the built-in heat exchanger 2, and the fresh raw gas inside the central heat exchange tube 3 is subjected to a secondary heat exchange by the high-temperature raw gas after deoxidation; the fresh raw gas after the secondary heat exchange enters the top of the deoxidizer; the other way is that the raw gas transported from the raw gas inlet pipe 8 enters the temperature-controlled heat exchange tube 4 along the branch pipe 13 on the annular inlet pipe 15, and the flow rate of the raw gas entering each branch is controlled by adjusting the regulating valve 10 provided on each branch.

[0053] The raw gas entering from the central heat exchange tube 3 and the raw gas entering from the self-controlling heat exchange tube 4 are merged at the top end cap 16 of the deoxidizer, and then pass through the sieve plate distributor 5 from top to bottom. After being buffered and distributed once at the sieve holes provided on the surface of the sieve plate distributor 5, the raw gas contacts the deoxidizer filled between the outer wall of the central heat exchange tube 3 and the inner wall of the deoxidizer, and the raw gas is buffered and distributed twice through the circular holes provided on the surface of the cone distributor 6, so as to ensure the uniform radial flow of the raw gas in the deoxidizer bed layer; after being deoxidized in the deoxidizer bed layer, the raw gas enters the bottom of the deoxidizer cylinder 1, exchanges heat with the fresh raw gas entering from the tube side of the built-in heat exchanger 2, and is discharged through the raw gas outlet pipe 9.

[0054] The pulverized deoxidizer powder also moves radially from top to bottom along with the flow direction of the raw gas, and is finally enriched in the powder collecting tank 7 . The deoxidizer powder in the powder collecting tank 7 is cleaned regularly through the powder discharge pipe 11 .

[0055] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A purification device for gas deoxygenation, characterized in that: include: A deoxidizer comprises a deoxidizer cylinder (1), wherein a raw gas inlet pipe (8) and a raw gas outlet pipe (9) are arranged at the bottom of the deoxidizer cylinder (1); A heat exchanger, arranged in the deoxidizer cylinder (1), comprising a built-in heat exchanger (2) and a central heat exchange pipe (3) connected to the built-in heat exchanger (2); the built-in heat exchanger (2) is located at the bottom of the deoxidizer cylinder (1), and its gas inlet is connected to the raw gas inlet pipe (8); the central heat exchange pipe (3) is located on the central axis of the deoxidizer cylinder (1), and the gas inlet at the lower end is connected to the gas outlet at the top of the built-in heat exchanger (2), and the gas outlet at the upper end is located in the head (16) at the top of the deoxidizer cylinder (1); a gas distributor, arranged in the deoxidizer cylinder (1), comprising a sieve plate distributor (5) and a cone distributor (6), wherein the sieve plate distributor (5) is located above the cone distributor (6), the central heat exchange pipe (3) passes through the sieve plate distributor (5) and the cone distributor (6), the sieve plate distributor (5) is evenly distributed with sieve holes; and the cone distributor (6) is provided with distribution holes; and A powder collecting tank (7) is connected to the central heat exchange tube (3) and to the small end of the cone distributor (6); a powder discharge pipe (11) is provided at the bottom of the powder collecting tank (7), and the powder discharge pipe (11) extends to the outside of the deoxidizer cylinder (1).

2. The gas deoxygenation purification device according to claim 1, characterized in that: The heat exchanger further comprises a plurality of temperature-controlled heat exchange tubes (4) uniformly distributed along the outer circumference of the central heat exchange tube (3); the side gas inlet of the temperature-controlled heat exchange tube (4) is connected to the raw gas inlet pipe (8) via an annular inlet pipe (15); the upper gas outlet of the temperature-controlled heat exchange tube (4) is flush with the upper gas outlet of the central heat exchange tube (3).

3. The purification device for gas deoxygenation according to claim 1, characterized in that: The central heat exchange tube (3) is a hollow cross-shaped column.

4. The purification device for gas deoxygenation according to claim 1, characterized in that: The outer surface of the central heat exchange tube (3) is wound with a corrugated plate from bottom to top.

5. The purification device for gas deoxygenation according to claim 1, characterized in that: The cone distributor (6) comprises a normal cone distributor (6) and an inverted cone distributor (6), the small end of the normal cone distributor (6) is fixed to the central heat exchange tube (3), the large end of the inverted cone distributor (6) is fixed to the inner wall of the deoxidizer cylinder (1), and the powder collecting trough (7) is fixed to the small end of the inverted cone distributor (6).

6. The purification device for gas deoxygenation according to claim 5, characterized in that: A plurality of the forward cone distributors (6) and the inverted cone distributors (6) are alternately distributed from top to bottom in the deoxidizer cylinder (1).

7. The purification device for gas deoxygenation according to claim 5, characterized in that: The shortest distance from the large end edge of the regular cone distributor (6) to the inner wall of the deoxidizer cylinder (1) is 10±5 mm.

8. The purification device for gas deoxygenation according to claim 1, characterized in that: The included angle a between the edge line of the cone distributor (6) and the inner wall of the deoxidizer cylinder (1) is 45°.

9. The purification device for gas deoxygenation according to claim 1, characterized in that: The distribution holes on the cone distributor (6) are distributed in a ring shape around the central axis of the deoxidizer cylinder (1), and the diameters of the distribution holes gradually increase from top to bottom.

10. The purification device for gas deoxygenation according to claim 1, characterized in that: Three layers of sieve plate distributors (5) are arranged on the top of the deaerator cylinder (1), and the distance between two adjacent layers of sieve plate distributors (5) is 20±5 cm.

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