Absorption tower for treating metallurgical gas CO2

Abstract

The utility model belongs to the technical field of gas purification, and particularly discloses an absorption tower for treating metallurgical coal gas CO2, which comprises a cylinder body, an upper seal head arranged above the cylinder body, a purified gas outlet pipe communicated with the upper seal head, a pressure detection pressure taking hole arranged on the upper seal head, a wire mesh demister arranged in the cylinder body, a solution inlet pipe penetrating through the cylinder body, and a solution outlet pipe communicated with the solution inlet pipe. A solution flow control valve is arranged on the solution inlet pipe, a plurality of nozzles are arranged on the solution inlet pipe and located in the barrel, a plurality of flow dividing assemblies are arranged in the barrel, each flow dividing assembly is located below the solution inlet pipe, a plurality of filler assemblies are arranged in the barrel, and each filler assembly is located below the corresponding flow dividing assembly. A raw material gas inlet pipe is communicated with the barrel body, a lower sealing head is arranged below the cylinder, an annular base is connected below the cylinder, the lower sealing head is located in the annular base, a rich liquid outlet pipe is communicated with the lower sealing head, the other end of the rich liquid outlet pipe fixedly penetrates through the annular base, and a rich liquid flow control valve is arranged on the rich liquid outlet pipe.

Description

Technical Field

[0001] This utility model relates to the field of gas purification technology, specifically to an absorption tower for treating CO2 from metallurgical coal gas. Background Technology

[0002] Metallurgical enterprises, especially those using blast furnaces and non-blast furnaces, need to recycle top gas. Removing CO2 from the gas is a crucial step in the gas treatment process. This typically involves using an absorption tower to absorb CO2, followed by a flash evaporator and regeneration tower to remove pure CO2, and then recycling the regenerated solution. Traditional absorption towers often suffer from low efficiency, high energy consumption, and complex equipment when absorbing CO2 from gas. Therefore, a more efficient, energy-saving, and easy-to-operate absorption tower is needed. Utility Model Content

[0003] The purpose of this invention is to provide an absorption tower for treating CO2 in metallurgical coal gas, in order to solve the problems of low efficiency, high energy consumption and complex equipment that often exist when traditional absorption towers absorb CO2 in coal gas.

[0004] To achieve the above objectives, the basic solution provided by this utility model is as follows: an absorption tower for treating CO2 from metallurgical coal gas, comprising a cylindrical body, an upper end cap at the top of the cylindrical body, a purified gas outlet pipe connected to the upper end cap, a pressure detection and pressure tapping hole on the upper end cap, a wire mesh demister inside the cylindrical body, a solution inlet pipe penetrating the cylindrical body, a solution flow control valve on the solution inlet pipe, several nozzles on the solution inlet pipe, all of which are located inside the cylindrical body, multiple flow distribution components inside the cylindrical body, each flow distribution component located below the solution inlet pipe, multiple packing components inside the cylindrical body, each packing component located below each flow distribution component, a raw material gas inlet pipe connected to the cylindrical body, a lower end cap at the bottom of the cylindrical body, an annular base connected to the bottom of the cylindrical body, the lower end cap located inside the annular base, a rich liquid outlet pipe connected to the lower end cap, the other end of the rich liquid outlet pipe being fixedly inserted through the annular base, and a rich liquid flow control valve on the rich liquid outlet pipe.

[0005] The working principle of this utility model is as follows: coal gas enters the cylinder through the raw material gas inlet pipe and comes into contact with the absorbent liquid that is evenly sprayed through the solution inlet pipe and nozzles; the flow splitting component ensures uniform gas-liquid distribution, the packing component increases the contact area and improves CO2 absorption efficiency, the purified gas is discharged from the purified gas outlet pipe after the liquid mist is removed by the wire mesh demister, and the rich liquid after absorbing CO2 is discharged through the rich liquid outlet pipe, the solution flow control valve and the rich liquid flow control valve respectively regulate the flow rate of the solution and the rich liquid, the pressure detection pressure tap is used to monitor the pressure inside the tower, and the annular base provides stable support.

[0006] The beneficial effects of this utility model are as follows: This device enhances gas-liquid contact through the diversion component and the packing component, efficiently absorbs CO2 from metallurgical coal gas, removes liquid droplets from the purified gas by the wire mesh demister, improves gas purity, facilitates monitoring of pressure inside the tower by the pressure detection tap, and ensures stable operation by precise regulation of each flow control valve, thereby improving overall processing efficiency and effect and extending equipment life.

[0007] Option 2, an optimized version of the basic option, features a pure water cleaning pipe running through the cylinder. This pipe is located below the wire mesh demister and above the packing assembly and flow divider assembly. The pure water cleaning pipe allows for periodic cleaning of the wire mesh demister, packing assembly, and flow divider assembly, preventing impurities from accumulating and affecting the gas-liquid mass transfer, demistering, and flow divider effects of the absorption tower, thus ensuring stable and efficient equipment operation.

[0008] Option 3, an optimal choice from the basic option, includes a flow divider plate with several solution distribution pipes connected to it. The solution distribution pipes are made of steel pipes with dovetail-shaped tops. The flow divider plate with these dovetail-shaped solution distribution pipes allows for more uniform dispersion of the solution from top to bottom, increases the contact area with the packing material below, enhances gas-liquid mass transfer, and improves the absorption of CO2 in metallurgical gas.

[0009] Option 4, a preferred option of the basic scheme, includes a packing assembly comprising a packing layer, a supporting diversion plate, and supporting stiffeners. The supporting diversion plate is located below the packing layer, and the supporting stiffeners are located below the supporting diversion plate. This packing assembly configuration, with the supporting diversion plate below the packing layer and the supporting stiffeners below it, effectively supports the packing layer, uniformly distributes gas and liquid, enhances the structural strength of the packing, optimizes liquid distribution, improves gas-liquid mass transfer efficiency, and ensures stable and efficient operation of the absorption tower.

[0010] Option 5, an optimal choice from the basic option, involves installing a level gauge on the cylinder near the lower head. This level gauge allows for real-time monitoring of the rich liquid level within the tower, providing operators with accurate level information to facilitate timely adjustments to operations, ensuring stable operation of the absorption tower, and preventing rich liquid overflow or excessively low levels from affecting absorption efficiency.

[0011] Option 6, the preferred option of the basic scheme, features a manhole on the upper end cap. This manhole facilitates personnel access to the absorption tower to inspect, repair, and replace components such as the wire mesh demister, ensuring normal equipment operation and ease of maintenance.

[0012] Option 7, the preferred option of the basic scheme, uses solenoid valves for both the solution flow control valve and the rich liquid flow control valve. Using solenoid valves enables automated and precise control, facilitates remote operation and system integration, and allows for rapid and accurate adjustment of the solution and rich liquid flow rates according to process requirements, improving the stability and efficiency of the absorption tower operation.

[0013] Option 8, an optimal choice from the basic options, features lifting lugs on the cylinder. This allows for precise lifting and positioning of the cylinder during manufacturing, installation, transportation, and maintenance, while ensuring stable lifting and enhancing safety. Attached Figure Description

[0014] Figure 1 This is a front view of an absorption tower for treating CO2 from metallurgical coal gas according to this utility model.

[0015] Figure 2 This is a top view of an absorption tower for treating CO2 from metallurgical coal gas, with the solution flow control valve and the rich liquid flow control valve removed.

[0016] Figure 3 yes Figure 2 Sectional view at point AA. Detailed Implementation

[0017] The present invention will be further described in detail below through specific embodiments:

[0018] The reference numerals in the accompanying drawings of the instruction manual include: 1. Cylinder, 2. Upper head, 3. Purified gas outlet pipe, 4. Pressure detection tap, 5. Wire mesh demister, 6. Solution inlet pipe, 7. Solution flow control valve, 8. Nozzle, 9. Raw material gas inlet pipe, 10. Lower head, 11. Annular base, 12. Rich liquid outlet pipe, 13. Rich liquid flow control valve, 14. Pure water cleaning pipe, 15. Diverter plate, 16. Solution diverter pipe, 17. Packing layer, 18. Supporting diverter plate, 19. Supporting rib, 20. Level gauge, 21. Manhole, 22. Lifting lug.

[0019] Example

[0020] The basic implementation examples are as follows: Figure 1 To be continued Figure 3The diagram shows an absorption tower for treating CO2 from metallurgical coal gas. It includes a cylindrical body 1, an upper end cap 2 connected to the top of the cylindrical body 1, a purified gas outlet pipe 3 connected to the upper end cap 2, a pressure detection tap 4 on the upper end cap 2, a wire mesh demister 5 inside the cylindrical body 1, a solution inlet pipe 6 passing through the cylindrical body 1, a solution flow control valve 7 on the solution inlet pipe 6, and several nozzles 8 located inside the cylindrical body 1. Multiple flow-dividing components are located inside the cylindrical body 1, each located below the solution inlet pipe 6. Multiple packing assemblies are also located inside the cylindrical body 1, each located below a flow-dividing component. A pure water cleaning pipe 14 passes through the cylindrical body 1, located below the wire mesh demister 5 and above the packing and flow-dividing components. A raw material gas inlet pipe 9 connects to the cylindrical body 1. The lower end cap 10 is provided below the body 1, and an annular base 11 is connected to the lower end cap 1. The lower end cap 10 is located inside the annular base 11. A rich liquid outlet pipe 12 is connected to the lower end cap 10. The other end of the rich liquid outlet pipe 12 is fixedly inserted through the annular base 11. A rich liquid flow control valve 13 is provided on the rich liquid outlet pipe 12. Both the solution flow control valve 7 and the rich liquid flow control valve 13 are solenoid valves. The flow distribution assembly includes a flow distribution plate 15. Several solution flow distribution pipes 16 are connected to the flow distribution plate 15. The packing assembly includes a packing layer 17, a supporting flow distribution plate 18, and a supporting rib 19. The supporting flow distribution plate 18 is located below the packing layer 17, and the supporting rib 19 is located below the supporting flow distribution plate 18. A level gauge 20 is provided on the body 1 near the lower end cap 10. A manhole 21 is provided on the upper end cap 2. A lifting lug 22 is provided on the body 1.

[0021] The implementation method of this embodiment is as follows:

[0022] In processing metallurgical coal gas (CO2), the coal gas enters the absorption tower body 1 through the raw material inlet pipe 9 and flows upwards. The solution enters the absorption tower body 1 through the solution inlet pipe 6, and the flow rate is regulated by the solution flow control valve 7. The solution is then sprayed out through nozzles 8, forming a mesh structure that covers the entire circumference of the body 1. Under the action of multiple flow dividers 15 and solution distribution pipes 16, the solution is evenly dispersed and fully contacts the coal gas. Subsequently, the gas-liquid mixture passes through the packing layer 17, where, with the assistance of the supporting flow dividers 18 and supporting ribs 19, gas-liquid mass transfer is enhanced, absorbing CO2 from the coal gas. 2， After the purified gas passes through the wire mesh demister 5 to remove droplets, it is discharged through the purified gas outlet pipe 3. The rich liquid after absorbing CO2 flows out through the rich liquid outlet pipe 12. The rich liquid flow rate is controlled by the rich liquid flow control valve 13. During operation, the pressure detection tap 4 is used to detect the pressure inside the tower. The command to adjust the rich liquid flow control valve 13 is detected by the level gauge 20. The rich liquid flow control valve 13 is opened and closed by the automatic electrical control command. The internal components can be cleaned periodically through the pure water cleaning pipe 14. If maintenance is required, the staff can enter the tower through the manhole 21 of the upper head 2.

[0023] 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. An absorption column for treating metallurgical gas CO2, characterized in that, The utility model relates to a kind of purification tower, including cylinder (1), the upper portion of the cylinder (1) is equipped with upper head (2), the upper head (2) is connected with the out purified gas pipe (3), the upper head (2) is opened with pressure detection pressure hole (4), the cylinder (1) is equipped with wire mesh demister (5), the cylinder (1) is penetrated with solution inlet pipe (6), the solution inlet pipe (6) is equipped with solution flow control valve (7), the solution inlet pipe (6) is equipped with several spray heads (8), several spray heads (8) are located inside cylinder (1), the cylinder (1) is equipped with multiple shunt components, each shunt component is located below solution inlet pipe (6), the cylinder (1) is equipped with multiple packing components, each packing component is located below each shunt component, the cylinder (1) is connected with the inlet raw gas pipe (9), the lower portion of the cylinder (1) is equipped with lower head (10), the lower portion of the cylinder (1) is connected with annular base (11), the lower head (10) is located inside annular base (11), the lower head (10) is connected with the out rich liquid pipe (12), the other end of the out rich liquid pipe (12) is fixedly penetrated in annular base (11), the out rich liquid pipe (12) is equipped with rich liquid flow control valve (13).

2. An absorption column for treating metallurgical gas CO2 according to claim 1, characterized in that, The cylinder (1) is penetrated with pure water cleaning pipe (14), and the pure water cleaning pipe (14) is located below wire mesh demister (5), above packing component and shunt component.

3. An absorption column for treating metallurgical gas CO2 according to claim 1, characterized in that, The shunt component includes shunt plate (15), and the shunt plate (15) is connected with several solution shunt pipes (16).

4. An absorption column for treating metallurgical gas CO2 according to claim 1, characterized in that, The packing component includes packing layer (17), support shunt plate (18) and support rib plate (19), the support shunt plate (18) is located below packing layer (17), and the support rib plate (19) is located below support shunt plate (18).

5. An absorption column for treating metallurgical gas CO2 according to claim 1, characterized in that, The cylinder (1) is equipped with liquid level meter (20) near lower head (10).

6. An absorption column for treating metallurgical gas CO2 according to claim 1, characterized in that, The upper head (2) is equipped with manhole (21).

7. An absorption column for treating metallurgical gas CO2 according to claim 1, characterized in that, The solution flow control valve (7) and rich liquid flow control valve (13) are both solenoid valves.

8. An absorption column for treating metallurgical gas CO2 according to claim 1, characterized in that, The cylinder (1) is equipped with lifting lug (22).

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