CN212476648U

CN212476648U - Desulfurization regeneration tower

Info

Publication number: CN212476648U
Application number: CN202020925147.2U
Authority: CN
Inventors: 钱利军; 马俊威; 许浙娜
Original assignee: Ningbo Fareasttech Catalyst Engineering Co ltd
Current assignee: Ningbo Fareasttech Catalyst Engineering Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2021-02-05
Anticipated expiration: 2030-05-27

Abstract

The utility model discloses a desulfurization regeneration tower, which is used for removing substances such as hydrogen sulfide in coal gas, in particular to a combined tower device integrating desulfurization and regeneration into a whole structure, which comprises a lower-section desulfurization section and an upper-section regeneration section, wherein the lower-section desulfurization section and the upper-section regeneration section are connected through a spherical cap type end socket; the desulfurization section is sequentially provided with a liquid seal groove, a coal gas inlet pipe, a filler module, a desulfurization liquid spraying device and a clean coal gas outlet from bottom to top, the lower part of the desulfurization section is provided with a desulfurization liquid outlet, and the coal gas inlet pipe is provided with a coal gas inlet main pipe and a coal gas inlet branch pipe; the regeneration section is provided with a compressed air and desulfurization liquid inlet, a sulfur foam outlet and a regeneration liquid outlet; the coal gas containing hydrogen sulfide enters the desulfurization section through a coal gas inlet pipe, flows upwards through the filler module, is in reverse contact reaction with the desulfurization liquid flowing downwards through the desulfurization liquid spraying device, and is discharged from a clean coal gas outlet after sulfur impurities are removed; the reacted desulfurization liquid flows to a liquid seal tank at the bottom of the desulfurization section, and is sent to the regeneration section through an external circulating pump to react with oxygen in the compressed air, so that the purpose of regeneration of the desulfurization liquid is achieved, and the regenerated regeneration liquid flows into the desulfurization spray device of the desulfurization section through an external pipeline through a regeneration liquid outlet.

Description

Desulfurization regeneration tower

Technical Field

The utility model relates to a wet-type desulfurization regeneration facility, concretely relates to joint tower device of collection desulfurization and regeneration structure as an organic whole for materials such as hydrogen sulfide in the getting rid of coal gas.

Background

As a large coal and steel country in China, a large number of coking enterprises exist nationwide, however, coal gas generated by the enterprises contains a large amount of hydrogen sulfide gas, and the coal gas needs to be desulfurized in order to reduce the harm to the living environment of human beings. At present, the domestic desulfurization process is mainly wet, the main equipment of the existing desulfurization regeneration device is a desulfurization tower and a regeneration tower which are respectively two equipment, a liquid seal tank, a reaction liquid tank, a desulfurization circulating pump and other equipment are also arranged in the middle of the desulfurization regeneration device, a large amount of process pipelines need to be arranged, a large amount of investment is needed, a large amount of land is occupied, the desulfurization does not reach the standard, and the energy loss is huge.

Patent No. CN 204897852U's patent has announced a integrative tower of coal gas desulfurization regeneration, including hypomere desulfurization section and upper segment regeneration section, the desulfurization liquid flows through the desulfurizing tower and passes through the gas-liquid mixer in the desulfurizing tower lower part and carry the desulfurization liquid after retrieving to the supermere regeneration section through the desulfurization liquid conveyer pipe by the circulating pump after oxygen reaction, and the desulfurization liquid after the regeneration is carried to hypomere desulfurization section through outside pipeline again. In this patent, the desulfurization solution does not necessarily react with the oxygen in the air sufficiently in the gas-liquid mixer, and the desulfurization solution sprayed by the spray head cannot be uniformly distributed in the desulfurization section, which is likely to cause the waste of the desulfurization solution and affect the desulfurization efficiency. The desulfurization liquid conveying pipe is positioned at the center of the cyclone separator in the desulfurization section, so that the equipment is not easy to clean and maintain. In addition, in order to uniformly distribute the coal gas in the existing desulfurization regeneration tower, a coal gas distributor is usually arranged at a coal gas inlet, so that the equipment cost and the maintenance cost are increased.

Disclosure of Invention

The utility model aims to solve the technical problem that a desulfurization regeneration tower is provided, solve desulfurization in-process doctor solution and coal gas reaction insufficient, easily cause doctor solution extravagant, doctor solution regeneration not thorough and the high scheduling problem of equipment maintenance cost to improve desulfurization efficiency and reduce cost.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a desulfurization regeneration tower comprises a lower-section desulfurization section and an upper-section regeneration section, wherein the desulfurization section is sequentially provided with a liquid seal groove, a coal gas inlet pipe, a filler module, a desulfurization liquid spray device and a clean coal gas outlet from bottom to top; the regeneration section is provided with a compressed air and desulfurization liquid inlet, a sulfur foam outlet and a regeneration liquid outlet, a compressed air and desulfurization liquid inlet pipe is arranged in the compressed air and desulfurization liquid inlet, at least two layers of porous plate distributors are arranged in the regeneration section, and the compressed air and desulfurization liquid inlet pipe penetrates through the porous plate distributors and extends to the bottom of the regeneration section; the regeneration liquid outlet is connected with a desulfurization liquid spraying device through an external pipeline; the filler module in the desulfurization section can increase the contact area of the desulfurization solution and the coal gas, and is favorable for separating out hydrogen sulfide in the coal gas.

Preferably, the gas inlet branch pipes are distributed on two sides of the gas inlet main pipe, and a certain number of waist-shaped holes are uniformly formed in the downward positions of the gas inlet main pipe and the gas inlet branch pipes; the gas inlet pipe with the branched structure enables gas to be uniformly distributed in the diameter section of the cylinder body of the desulfurization section, full reaction with desulfurization liquid is facilitated, an additionally installed gas distributor is not needed, and equipment cost is reduced.

Preferably, the bottom of the compressed air and desulfurization solution inlet pipe is provided with a tooth-shaped groove; when the compressed air enters the regeneration section, the compressed air can be uniformly diffused outwards through the tooth-shaped grooves and then redistributed through the porous plate distributor, so that the oxygen in the compressed air can be fully contacted with the desulfurization liquid, the desulfurization liquid is regenerated, and the oxygen utilization rate in the compressed air is greatly improved.

Preferably, the desulfurization solution spraying device comprises a primary desulfurization solution spraying device and a secondary desulfurization solution spraying device, and a filler layer is arranged between the primary desulfurization solution spraying device and the secondary desulfurization solution spraying device.

Preferably, the primary desulfurization liquid spraying device consists of a primary spraying main pipe and a plurality of primary spraying branch pipes, the primary spraying branch pipes are symmetrically distributed along the central line of the primary spraying main pipe, and a certain number of spraying holes are formed below the primary spraying main pipe and the primary spraying branch pipes; the secondary desulfurization liquid spraying device consists of a secondary spraying main pipe and a plurality of secondary spraying branch pipes, a certain number of spray heads are arranged at the lower parts of the secondary spraying branch pipes, and the spray heads are uniformly distributed in the horizontal section of the tower body along the diameter of the cylinder body; in the desulfurization regenerator column course of operation, the regeneration liquid that flows out from the regeneration liquid export flows into one-level doctor solution spray set and second grade doctor solution spray set respectively through the outside pipeline, the regeneration liquid on the one-level spray set of flowing through sprays through the round hole downwards and flows down through the packing layer is slowly even downwards, the regeneration liquid on the second grade spray set of flowing through sprays the lower part packing layer after the shower nozzle atomizing, the twice process of spraying is favorable to doctor solution evenly distributed in the desulfurizing tower, promote doctor solution and coal gas fully contact reaction, improve desulfurization efficiency when practicing thrift the doctor solution.

Preferably, the packing module comprises packing components, and a gas-liquid distributor is arranged between the packing components; the gas-liquid distributor among the fillers can ensure that gas and liquid in the desulfurization section do not flow bias, the middle flow velocity is high when the gas passes through the gas-liquid distributor, the flow velocity at two sides is low, the efficiency of the tower wall can be fully exerted, and the full contact reaction of the desulfurization liquid and the coal gas is promoted.

Preferably, the inner wall of the cylinder at the upper part of the regeneration section is provided with an annular gap groove with a certain inclination angle, and the inner side of the cylinder of the regenerated liquid outlet is provided with a cover plate; the inclined annular gap groove is beneficial to sulfur foam to carry a large amount of sulfur paste to flow out to next process equipment through the sulfur foam port during overflow, and the cover plate arranged on the inner side of the regenerated liquid outlet cylinder body can prevent sulfur foam from flowing out together with the sulfur foam.

Preferably, the desulfurization section and the regeneration section are connected through a spherical cap type end socket; compared with a flat-cap type end socket, the spherical cap type end socket has better stress capacity.

Preferably, the shell of the desulfurization regeneration tower is made of a Q245R steel plate, and an anticorrosive coating layer is sprayed on the inner wall of the desulfurization regeneration tower; compared with the S30408 steel plate material, the Q245R steel plate can reduce the economic cost to a greater extent, and the anticorrosive coating layer can prevent corrosive media from directly contacting with the inner wall of the equipment, so that the service life of the equipment is prolonged.

Preferably, the desulfurization section direct mount does not set up the skirt barrel on the soleplate, and make full use of space has reduced equipment height, saves economic cost.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the regenerated desulfurization solution is distributed in the desulfurization section cylinder more slowly and uniformly, so that the contact area with sulfur-containing gas is increased, the desulfurization efficiency is improved, the desulfurization solution is saved, and the use efficiency of the desulfurization solution is improved;

2. the sulfur-containing gas can be more uniformly distributed in the desulfurization tower cylinder body, and the filler module and the gas-liquid distributor enable the gas to be more fully contacted with the desulfurization liquid, so that the desulfurization efficiency is further improved;

3. the porous plate distributor and the compressed air and desulfurization liquid inlet pipe with the toothed groove at the bottom enable compressed air to be uniformly diffused outwards when entering the regeneration section, and then the compressed air is redistributed through the porous plate distributor, so that oxygen in the compressed air can be fully contacted with desulfurization liquid, and the oxygen utilization rate and the desulfurization liquid regeneration efficiency in the compressed air are greatly improved;

4. the lower-section desulfurization section is directly arranged on the foundation slab without a skirt barrel, so that the space is fully utilized, the equipment height is reduced, and the economic cost is saved; the regeneration tower shell is made of a Q245R steel plate, and the inner wall of the tower body and the anti-corrosion coating layer on the spherical cap end socket can reduce economic cost and prolong the service life of equipment.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a desulfurization regeneration tower device.

FIG. 2 is a schematic diagram of the structure of the desulfurization section.

FIG. 3 is a schematic diagram of the regeneration section.

FIG. 4 is a top view of a gas inlet of the desulfurization section.

FIG. 5 is a top view of a desulfurization section primary desulfurization liquid spray device.

FIG. 6 is a top view of a spray device for secondary desulfurization solution in the desulfurization section.

FIG. 7 is a front view of the liquid seal at the bottom of the desulfurization section.

FIG. 8 is a sectional view of the liquid seal A-A at the bottom of the desulfurization section.

The reference signs are: 1-a desulfurization section, 2-a regeneration section, 3-a clean gas outlet, 4-a primary desulfurization spray device, 5-a packing layer, 6-a secondary desulfurization spray device, 7-a packing component, 8-a gas-liquid distributor, 9-a gas inlet pipe, 10-a liquid seal tank, 11-a T-shaped downcomer, 12-a liquid level meter, 13-a desulfurization liquid outlet, 14-a spherical cap-shaped end socket, 15-a porous plate distributor, 16-a compressed air and desulfurization liquid inlet pipe, 17-a sulfur foam outlet, 18-an annular gap tank, 19-a regeneration liquid outlet, 20-a sewage outlet, 21-a gas inlet main pipe, 22-a gas inlet branch pipe, 23-a kidney-shaped hole, 24-a primary spray main pipe, 25-a primary spray branch pipe and 26-a spray hole, 27-secondary spray main pipe, 28-secondary spray branch pipe and 29-spray head.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1-8, the desulfurization regeneration tower comprises a desulfurization section 1 and a regeneration section 2, the desulfurization section 1 is located above the regeneration section 2, and the two sections are connected through a spherical cap type seal head 14, a coal gas inlet pipe 9 is arranged at the lower part of the desulfurization section 1, the coal gas inlet pipe 9 comprises a thicker coal gas inlet

main pipe

21 and 18 thinner coal gas inlet branch pipes 22, the coal gas inlet branch pipes 22 are distributed at two sides of the coal gas inlet

main pipe

21, 3 filler components 7 with the height of 4 meters are arranged above the coal gas inlet pipe 9, the filler components 7 are made of porous light porcelain materials, a gas-liquid distributor 8 is arranged between every two adjacent filler components 7, and the gas-liquid distributor 8 is a detachable gas-liquid distributor; a primary spray device 4 and a secondary spray device 6 are respectively arranged above a packing component 7 positioned at the uppermost part of the desulfurizing tower 1, the primary spray device 4 is positioned above the secondary spray device 6, a packing layer 5 with the height of 1.2 m is arranged between the primary spray device 4 and the secondary spray device 6, the primary spray device 4 and the secondary spray device 6 are respectively connected with a regenerated liquid outlet 19 at the upper part of a cylinder body of the regeneration section 2 through an external pipeline, a cover plate is arranged at the inner side of the cylinder body of the regenerated liquid outlet 19 to prevent sulfur foam and regenerated liquid from flowing out together, the primary spray device 4 is composed of a thicker primary spray

main pipe

24 and 16 thinner primary spray branch pipes 25, the primary spray main pipes 25 are symmetrically distributed along the central line of the primary spray main pipe 24, a certain number of spray holes 26 are arranged below the primary spray main pipe 24 and the primary spray branch pipes 25, and the secondary spray device is composed of a, the secondary spray branch pipes 28 are distributed at two sides of the secondary spray main pipe 27, a certain number of spray heads 29 are arranged at the lower parts of the secondary spray branch pipes 28, the spray heads 29 are uniformly distributed in the diameter section of the cylinder, and a clean coal gas outlet 3 is arranged above the primary desulfurization liquid spray device 4; the bottom of the desulfurization section 1 is provided with a liquid seal groove 10, a liquid level meter 12 and a desulfurization liquid outlet 13 are arranged in the liquid seal groove 10, the liquid level meter 12 is used for measuring the liquid level height of the desulfurization liquid, the desulfurization liquid outlet 13 is connected with an external circulating pump, and a T-shaped down-flow plate 11 is arranged between the liquid seal groove 10 and the inner wall of the cylinder; the top circumference of the regeneration section 2 is uniformly distributed with compressed air and desulfurization liquid inlets, the compressed air and desulfurization liquid inlets are internally provided with compressed air and desulfurization liquid inlet pipes 16 with the bottoms in the shape of tooth-shaped grooves, the regeneration section 2 is internally provided with two layers of porous plate distributors 15, the porous plate distributors 15 are fully provided with phi 15 holes, the compressed air and desulfurization liquid inlet pipes 16 penetrate through the porous plate distributors 15 and extend to the lower part of the regeneration section 2, the upper end of a cylinder body of the regeneration section 2 is provided with a sulfur foam outlet 17, the inner wall of the cylinder body is provided with an annular gap groove 18 with a certain inclination angle, the bottom of the regeneration section 2 is a spherical end socket 14, and the bottom is also provided with a sewage discharge outlet 20; the casing of the desulfurization regeneration tower is made of a Q245R steel plate, and the inner wall of the desulfurization regeneration tower and the spherical cap end enclosure 14 are sprayed with an anticorrosive coating.

When coal gas containing hydrogen sulfide enters from the bottom of the desulfurization section 1 through a coal gas inlet pipe 9, the coal gas uniformly flows through a coal gas inlet main pipe 21 and a coal gas inlet branch pipe 22, flows through a filler component 7 and a gas-liquid distributor 8, slowly and reversely contacts and reacts with desulfurization liquid which flows downwards after being sprayed by a primary spraying device 4 and a secondary spraying device 6, sulfur-containing impurities are removed, the desulfurization liquid is discharged from a clean coal gas outlet 3 and is sent to a rear working section, the sulfur-containing impurities are removed, the flow of the sprayed desulfurization liquid can be controlled through a pneumatic adjusting valve, the reacted desulfurization liquid flows to a liquid seal groove 10 at the bottom of the desulfurization section, when the liquid level in the liquid seal groove 10 reaches a certain value, the desulfurization liquid stored in the liquid seal groove is sent to the top of the regeneration section 2 through a circulating pump connected with a desulfurization liquid outlet 13, and is sprayed into the regeneration section 2 through a compressed air and desulfurization liquid inlet pipe 16 through an injector to react, the aim of regenerating the desulfurization liquid is achieved, sulfur foam generated in the regeneration process flows into a foam sulfur outlet 17 through the inclined direction of the annular groove 18, and the regenerated regeneration liquid flows into the first-stage desulfurization spraying device 4 and the first-stage desulfurization spraying device 6 of the lower-section desulfurization section 1 through an external pipeline via a regeneration liquid outlet 19.

Claims

1. A desulfurization regeneration tower comprises a lower desulfurization section and an upper regeneration section, and is characterized in that the desulfurization section is sequentially provided with a liquid seal tank, a coal gas inlet pipe, a filler module, a desulfurization liquid spray device and a clean coal gas outlet from bottom to top, the lower part of the desulfurization section is provided with a desulfurization liquid outlet, the coal gas inlet pipe is provided with a coal gas inlet main pipe and a coal gas inlet branch pipe, and the filler module is arranged in the middle of the desulfurization section; the regeneration section is provided with a compressed air and desulfurization liquid inlet, a sulfur foam outlet and a regeneration liquid outlet, a compressed air and desulfurization liquid inlet pipe is arranged in the compressed air and desulfurization liquid inlet, at least two layers of porous plate distributors are arranged in the regeneration section, and the compressed air and desulfurization liquid inlet pipe penetrates through the porous plate distributors and extends to the bottom of the regeneration section; the regeneration liquid outlet is connected with a desulfurization liquid spraying device through an external pipeline.

2. The desulfurization regeneration tower of claim 1, wherein said gas inlet branch pipes are distributed on both sides of said gas inlet main pipe, and said gas inlet main pipe and said gas inlet branch pipes are uniformly provided with a certain number of waist-shaped holes at downward positions.

3. The desulfurization regeneration tower of claim 1, wherein said compressed air and desulfurization solution inlet pipe is provided with a tooth-shaped groove at the bottom.

4. The desulfurization regeneration tower of claim 1, 2 or 3, wherein said desulfurization solution spray device comprises a primary desulfurization solution spray device and a secondary desulfurization solution spray device; a packing layer is arranged between the primary desulfurization liquid spray device and the secondary desulfurization liquid spray device.

5. The desulfurization regeneration tower of claim 4, wherein the primary desulfurization solution spraying device comprises a primary spraying main pipe and a plurality of primary spraying branch pipes, the primary spraying branch pipes are symmetrically distributed along the central line of the primary spraying main pipe, and a certain number of spraying holes are formed below the primary spraying main pipe and the primary spraying branch pipes; the second-stage desulfurization liquid spraying device is composed of a second-stage spraying main pipe and a plurality of second-stage spraying branch pipes, a certain number of spray heads are installed on the lower portions of the second-stage spraying branch pipes, and the spray heads are uniformly distributed in the horizontal cross section of the tower body.

6. The desulfurization regeneration tower of claim 1, wherein said packing modules comprise packing elements, and gas-liquid distributors are arranged between the packing elements.

7. The desulfurization regeneration tower of claim 1, wherein the inner wall of the upper cylinder of the regeneration section is provided with an annular gap groove with a certain inclination angle, and the inner side of the regeneration liquid outlet cylinder is provided with a cover plate.

8. A desulfurization regenerator column according to claim 1 or 2 or 3 or 6 or 7, wherein said desulfurization section and said regeneration section are connected by spherical cap type headers.

9. The desulfurization regeneration tower of claim 8, wherein the casing of the desulfurization regeneration tower is made of a Q245R steel plate, and an anticorrosive coating layer is sprayed on the inner wall of the desulfurization regeneration tower.

10. A desulfurization regeneration tower according to claim 1, 2, 3, 5, 6, 7 or 9, wherein said desulfurization section is directly mounted on the foundation bed without skirt cylinder.