Regeneration tower for removing CO2 from metallurgical gas

Abstract

The utility model belongs to the technical field of metallurgical gas decarburization, and particularly discloses a regeneration tower for removing CO2 from metallurgical gas, which comprises a bottom seal head, a lower cylinder body arranged on the bottom seal head, an upper cylinder body arranged on the lower cylinder body, a liquid inlet pipe penetrating through the upper cylinder body, an upper distributor arranged in the upper cylinder body, an upper distributor plate, a filler area I and a guide plate I, two liquid outlets are formed in the upper cylinder body in a penetrating mode, each liquid outlet is communicated with a heater, each heater is communicated with a liquid inlet, each liquid inlet is communicated with the lower cylinder body, and the upper cylinder body is provided with a transition cylinder, a top cylinder body, a top end socket and a gas outlet. The problems that when an existing regeneration tower conducts regeneration analysis on large and medium-sized blast furnace gas, due to the fact that the large and medium-sized blast furnace gas generates a large amount of gas, pregnant solution heating is not sufficient, CO2 in the pregnant solution is not sufficient to remove, and the decarburization efficiency is low are solved.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical gas decarbonization technology, specifically to a regeneration tower for removing CO2 from metallurgical gas. Background Technology

[0002] In metallurgical processes, coal gas often contains a high carbon content, which not only affects its calorific value but may also adversely impact subsequent production processes. Therefore, metallurgical coal gas decarbonization technology has emerged. The hydrogen-rich carbon-cycle oxygen blast furnace process is a smelting process that uses cold oxygen blast instead of traditional heated air blast. It employs full oxygen blast, removing CO2 from high-calorific-value coal gas through a decarbonization system to form purified coal gas with a higher concentration.

[0003] In a hydrogen-rich carbon-cycle oxygen blast furnace, the top gas from the furnace is absorbed by an absorption tower to remove CO2. It then enters a flash tank for depressurization, forming a CO2-rich amine liquid (referred to as "rich liquid"). This liquid then enters a regeneration tower to release CO2. During this process, the rich amine liquid first enters the upper part of the regeneration tower for regeneration and desorption. The desorbed amine liquid then enters a reboiler for steam heating. The heated amine liquid then enters the lower part of the regeneration tower for further regeneration and desorption. The resulting amine liquid is returned to the absorption tower, completing the reuse of the amine liquid. Therefore, the CO2 removal capacity and efficiency of the regeneration tower are key equipment affecting the stable operation of the entire hydrogen-rich carbon-cycle oxygen blast furnace decarbonization unit. However, existing regeneration towers, when regenerating and desorbing gas from large and medium-sized blast furnaces, suffer from insufficient heating of the rich liquid due to the large volume of gas produced, resulting in inadequate CO2 removal and low decarbonization efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a regeneration tower for removing CO2 from metallurgical coal gas, in order to solve the problem that existing regeneration towers, when regenerating and analyzing coal gas from large and medium-sized blast furnaces, suffer from insufficient heating of the rich liquid due to the large amount of coal gas produced, resulting in inadequate CO2 removal and low decarbonization efficiency.

[0005] To achieve the above objectives, the basic solution provided by this utility model is as follows: a regeneration tower for removing CO2 from metallurgical coal gas, comprising a bottom end cap, a lower cylinder body on the bottom end cap, and, from top to bottom, a lower distributor, a lower distribution plate, a second packing zone, a second guide plate, and a liquid outlet inside the lower cylinder body. A lower level gauge is provided above the liquid outlet. A convex groove is provided on the lower cylinder body, and a vent pipe and an upper cylinder body are provided on the convex groove. A baffle plate is provided on the vent pipe. An inlet pipe passes through the upper cylinder body. Inside the upper cylinder body, from top to bottom, the following components are arranged... It is equipped with an upper distributor, an upper distribution plate, a packing zone, and a guide plate. Both the upper and lower distributors are multi-layer tubular distributors. Each pipe inlet is dovetail-shaped. There are two drain ports running through the upper cylinder. Each drain port is connected to a heater. Each heater is connected to an inlet. Each inlet is connected to the lower cylinder. An upper level gauge is installed above the drain port. An intermediate cylinder is installed on the upper cylinder. A top cylinder is installed on the intermediate cylinder. A top end cap is installed on the top cylinder. An air outlet is installed on the top end cap.

[0006] The principle and beneficial effects of this utility model are as follows: In use, the rich liquid flowing out of the flash tank enters the upper cylinder through the inlet pipe. Inside the upper cylinder, it passes through the upper distributor, the first packing zone, and the first guide plate in sequence, and then enters the heaters through two outlets. After being heated, the rich liquid enters the lower cylinder through the inlet. Because the bottom of the convex groove is inclined towards the outlet, it facilitates the entry of the rich liquid into the lower cylinder. By adding heaters, the problem of insufficient CO2 removal caused by insufficient heating of the rich liquid is reduced. After being heated, the rich liquid passes through the lower distributor, the second packing zone, and the second guide plate in sequence in the lower cylinder, and finally flows out through the outlet. Since both the upper and lower distributors are multi-layer tubular distributors, each pipe inlet is dovetail-shaped. When the rich liquid exceeds the lowest point of the dovetail of the upper distributor, it flows evenly into the packing zone and the guide plate along the inner wall of the pipe of the upper distributor. By setting two sets of heaters, the rich liquid is fully heated, increasing the decarbonization efficiency.

[0007] Option 2, which is the preferred option of the basic option, has a flow regulating component 1 on the inlet pipe, a flow regulating component 2 on the outlet pipe, and a flow regulating component 3 on the outlet pipe. Flow regulating component 1 is a butterfly valve, which has a simple structure and is suitable for large flow regulation. Flow regulating components 2 and 3 are both hydraulic actuator valves, which regulate the flow by hydraulically driving the valves. They are suitable for large flow and high pressure applications, can accurately regulate the flow, maintain the flow stability, reduce fluctuations, and can reduce equipment wear.

[0008] Option 3, the preferred option of the basic option, is equipped with a pressure gauge on the top end cap and a pressure regulating valve on the outlet. The pressure gauge and the pressure regulating valve are electrically connected. The pressure gauge can provide real-time data on the regeneration tower pressure, promptly detect pressure abnormalities, and prevent equipment damage or safety accidents. When the pressure gauge malfunctions, the pressure can be automatically adjusted through the pressure regulating valve to prevent the regeneration tower pressure from being too high and to avoid exceeding the safety limit, thus increasing the safety of the regeneration tower.

[0009] Option 4, which is a preferred option of the basic option, has a drain port on the bottom end cap, located in the center of the bottom end cap; used to remove large particulate impurities deposited in the solution.

[0010] Option 5, which is the preferred option of the basic option, has a skirt on the bottom end cap; the skirt evenly distributes the weight of the regeneration tower to the ground, and the skirt structure is simpler, which can increase the stability of the regeneration tower.

[0011] Option 6, a preferred option of Option 2, involves the lower level gauge and flow regulator being electrically connected, and the upper level gauge and flow regulator being electrically connected. Both the lower and upper level gauges have threshold values. When the lower level gauge detects that the liquid level is too high, the flow regulator controls the outflow rate of the decarbonized amine liquid to increase the decarbonization efficiency. When the upper level gauge detects that the liquid level is too high, the flow regulator controls the flow rate of the rich liquid from the drain port into the heater. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a regeneration tower for removing CO2 from metallurgical coal gas according to this utility model;

[0013] Figure 2 yes Figure 1 Enlarged view of point A in the middle. Detailed Implementation

[0014] The present invention will be further described in detail below through specific embodiments:

[0015] The reference numerals in the accompanying drawings of the instruction manual include: 1. Top end cap, 2. Top cylinder, 3. Transition cylinder, 4. Upper cylinder body, 5. Lower cylinder body, 6. Bottom end cap, 7. Flow regulating component one, 8. Liquid inlet pipe, 9. Air outlet, 10. Pressure regulating valve, 11. Pressure gauge, 12. Upper distributor, 13. Upper distributor plate, 14. Packing zone one, 15. Guide plate one, 16. Convex groove, 17. Vent pipe, 18. Upper level gauge, 19. Drain outlet, 20. Heater, 21. Flow regulating component two, 22. Liquid inlet, 23. Lower distributor, 24. Lower distributor plate, 25. Guide plate two, 26. Liquid outlet, 27. Lower level gauge, 28. Skirt, 29. Drain outlet, 30. Packing zone two, 31. Baffle plate, 32. Flow regulating component three.

[0016] Example

[0017] like Figure 1 and Figure 2 As shown: A regeneration tower for CO2 removal from metallurgical coal gas includes a bottom head 6, a drain port 29 and a skirt 28 on the bottom head 6, a lower cylinder 5 on the bottom head 6, and inside the lower cylinder 5, from top to bottom, a lower distributor 23, a lower distributor plate 24, a second packing zone 30, a second guide plate 25 and a liquid outlet 26, a flow regulating element 32 on the liquid outlet 26, a lower level gauge 27 above the liquid outlet 26, and a convex groove 16 on the lower cylinder 5. The upper cylinder is equipped with a vent pipe 17 and an upper body 4. A baffle plate 31 is installed on the vent pipe 17. An inlet pipe 8 passes through the upper body 4, and a flow regulator 7 (a butterfly valve) is installed on the inlet pipe 8. Inside the upper body 4, from top to bottom, are an upper distributor 12, an upper distributor plate 13, a packing zone 14, and a guide plate 15. Both the upper distributor 12 and the lower distributor 23 are multi-layer tubular distributors. Each pipe inlet is dovetail-shaped. Two drain ports 19 pass through the upper body 4. Each drain port 19 is equipped with a flow regulating element 21, and each drain port 19 is connected to a heater 20. Each heater 20 is connected to an inlet 22, and each inlet 22 is connected to the lower cylinder body 5. The bottom of the convex groove 16 is inclined towards the drain port 19. An upper level gauge 18 is provided above the drain port 19. An intermediate cylinder 3 is provided on the upper cylinder body 4. The longitudinal section of the intermediate cylinder 3 is trapezoidal. A top cylinder 2 is provided on the intermediate cylinder 3. A top end cap 1 is provided on the top cylinder 2. A pressure gauge is provided on the top end cap 1. The pressure gauge 11 has an air outlet 9 on its top end cap 1 and a pressure regulating valve 10 on the air outlet 9. The pressure gauge 11 is an electronic pressure controller. The pressure gauge 11 and the pressure regulating valve 10 are electrically connected. The lower level gauge 27 is electrically connected to the flow regulating component 32. The upper level gauge 18 is electrically connected to the flow regulating component 21. Both the flow regulating component 21 and the flow regulating component 32 are hydraulic actuator valves. Both the upper level gauge 18 and the lower level gauge 27 are pressure level gauges.

[0018] The implementation method of this embodiment is as follows: In use, the rich liquid flowing out of the flash tank enters the upper cylinder 4 through the inlet pipe 8. Inside the upper cylinder 4, it passes sequentially through the upper distributor 12, the packing zone 14, and the guide plate 15. Since the upper distributor 12 is a multi-layer tubular distributor, each pipe inlet is dovetail-shaped. When the rich liquid exceeds the lowest point of the dovetail of the upper distributor 12, it flows evenly along the inner wall of the pipe of the upper distributor 12 into the packing zone 14 and the guide plate 15, and then enters the heater 20 from the two drain ports 19 respectively. After being heated, the rich liquid enters the heater 20 through the inlet. 22 enters the lower cylinder 5. Since the bottom of the convex groove 16 is inclined towards the drain port 19, it is convenient for the rich liquid to enter the lower cylinder 5. By adding a heater 20, the regeneration and desorption of the rich liquid is increased, thereby increasing the decarbonization effect. The heated rich liquid passes through the lower distributor 23, the second packing zone 30 and the second guide plate 25 in the lower cylinder 5 in sequence, and finally flows out from the outlet 26. Large particulate impurities deposited in the amine liquid are discharged from the drain port 29. The generated carbon dioxide gas passes through the lower cylinder 5, the vent pipe 17 and the upper cylinder 4 in sequence, and finally enters the carbon dioxide gas-liquid separator from the gas outlet 9.

[0019] Both the lower level gauge 27 and the upper level gauge 18 are equipped with threshold values. When the lower level gauge 27 detects that the liquid level is too high, the flow rate of the decarbonized amine liquid is controlled by the flow regulating element 32. When the upper level gauge 18 detects that the liquid level is too high, the flow rate of the rich liquid flowing into the heater 20 from the drain port 19 is controlled by the flow regulating element 21. When the pressure sensor 11 detects an abnormal pressure, the pressure can be adjusted by the pressure regulating valve 10.

[0020] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A regenerator column for the removal of CO2 from metallurgical gas, characterized in that, The utility model relates to a kind of liquid distribution devices, including bottom head (6), the lower cylinder body (5) is equipped on the bottom head (6), the lower cylinder body (5) is equipped with lower distributor (23) from top to bottom in sequence, lower distribution plate (24), filler zone two (30), guide plate two (25) and liquid outlet (26), lower liquid level meter (27) is equipped above the liquid outlet (26), the lower cylinder body (5) is equipped with convex groove (16), the upper cylinder body (4) is equipped with air pipe (17) on the convex groove (16), the air pipe (17) is equipped with liquid baffle (31), the upper cylinder body (4) is penetrated by liquid inlet pipe (8), the upper cylinder body (4) is equipped with upper distributor (12) from top to bottom in sequence, upper distribution plate (13), filler zone one (14) and guide plate one (15), two liquid outlets (19) are penetrated on the upper cylinder body (4), each liquid outlet (19) is communicated with heater (20), each heater (20) is communicated with liquid inlet (22), each liquid inlet (22) and lower cylinder body (5) are communicated, upper liquid level meter (18) is equipped above the liquid outlet (19), the upper cylinder body (4) is equipped with over cylinder (3), the over cylinder (3) is equipped with top cylinder body (2), the top cylinder body (2) is equipped with top head (1), the top head (1) is equipped with gas outlet (9).

2. A regenerative column for the removal of CO2 from metallurgical gas according to claim 1, characterized in that, Flow regulating member one (7) is equipped on the liquid inlet pipe (8), flow regulating member two (21) is equipped on the liquid outlet (19), flow regulating member three (32) is equipped on the liquid outlet (26).

3. A regenerative column for the removal of CO2 from metallurgical gas according to claim 1, characterized in that, Pressure detection meter (11) is equipped on the top head (1), pressure regulating valve (10) is equipped on the gas outlet (9), the pressure detection meter (11) and pressure regulating valve (10) are electrically connected.

4. A regenerative column for removing CO2 from metallurgical gas according to claim 1, characterized in that, The bottom head (6) is equipped with blowdown (29).

5. A regenerative column for removing CO2 from metallurgical gas according to claim 1, characterized in that, The bottom head (6) is equipped with apron (28).

6. A regenerative column for the removal of CO2 from metallurgical gas according to claim 2, characterized in that, Lower liquid level meter (27) and flow regulating member three (32) are electrically connected, upper liquid level meter (18) and flow regulating member two (21) are electrically connected.

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