CN216062713U - Uniform distribution type efficient wet desulphurization absorption tower - Google Patents

Abstract

The utility model discloses a uniform distribution type efficient wet desulphurization absorption tower, wherein the upper part in a shell is provided with two layers of demisters and two desalted water injectors, the two desalted water injectors are respectively arranged between the two layers of demisters and below the lower layer of demisters, and the desalted water injector is connected with a first desalted water inlet; the medicament ejector is connected with the first medicament inlet, and the shell is connected with the second medicament inlet; the bottom of the water tank is provided with a gas distributor, and a main pipe of the gas distributor is connected with a gas inlet pipe provided with a second desalted water inlet; the two downcomers in the shell are symmetrically arranged on two sides of the main pipe of the gas distributor, overflow ports are symmetrically formed in two sides of the upper part of each downcomer, the liquid level in the tower body exceeds the bottom height of each overflow port, and the liquid level foam height does not exceed the top height of each overflow port.

Description

Uniform distribution type efficient wet desulphurization absorption tower

Technical Field

The utility model relates to a uniform distribution type efficient wet desulphurization absorption tower, and belongs to the technical field of waste gas treatment.

Background

Hydrogen sulfide is a colorless gas with irritant malodor, and is commonly present in the fields of natural gas purification, petroleum refining, livestock raising, leather making and the like. Hydrogen sulfide is one of the main pollutants of the atmosphere and has certain harm to equipment and human bodies, so gaseous products and gas discharged into the atmosphere must be subjected to desulfurization treatment to ensure the product quality and reduce the influence on the environment. The complex iron wet desulphurization is a desulphurization method integrating desulphurization and sulphur recovery, and has the advantages of high desulphurization efficiency, low investment cost and operation cost, good environmental performance and the like. The absorption tower is used as a key device of the complex iron wet desulphurization process, and the device structure of the absorption tower greatly influences the desulphurization efficiency and the process stability. In the desulfurization process, hydrogen sulfide in the gas reacts with the complex iron desulfurizer, and the hydrogen sulfide is converted into elemental sulfur. When the gas velocity is high, a small amount of sulfur and reaction liquid are brought to the upper layer of the tower by rising gas to form entrainment, which may cause the problems of mass transfer efficiency reduction, medicament loss, scaling in the tower, pipeline and equipment blockage corrosion and the like, so that the entrainment is avoided as much as possible while the absorption tower keeps high treatment capacity and treatment efficiency in the actual process. The traditional spray absorption tower has a relatively simple structure, has cost advantage when treating gas with lower air volume, but can cause various problems due to high air volume and entrainment when treating gas with higher air volume, and influences treatment capacity and production stability.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a uniform distribution type efficient wet desulphurization absorption tower.

The technical scheme provided by the utility model is as follows: a uniform distribution type high-efficiency wet desulphurization absorption tower comprises a tower body formed by connecting a shell and a conical bottom, wherein the bottom of the conical bottom is provided with a medicament outlet; the top of the shell is provided with a gas vent; the device is characterized in that two layers of demisters and two desalted water ejectors are arranged at the upper part in the shell, the two desalted water ejectors are respectively arranged between the two layers of demisters and below the lower-layer demisters, and the two desalted water ejectors are respectively connected with two first desalted water inlets on the shell; a medicament ejector is arranged in the shell and connected with a first medicament inlet on the shell, and a second medicament inlet is connected on the shell in the middle of the desulfurization area; the bottom in the shell is provided with a gas distributor, a main pipe of the gas distributor is connected with a gas inlet pipe, the gas inlet pipe is connected with the shell, and a second desalted water inlet is formed in the inlet of the gas inlet pipe; two downcomers are arranged in the shell, the downcomers are symmetrically arranged on two sides of the main pipe of the gas distributor, and overflow ports are symmetrically formed in two sides of the upper part of each downcomer.

Preferably, the upper demister in the two demisters is a wire mesh demister, and the lower demister is a baffle demister.

Preferably, the distance between the two layers of demisters is 900 mm-2000 mm.

Preferably, the opening arc length of the overflow port is 1/4 of the circumference of the cross section of the downcomer, and the opening height of the overflow port is 1/7-1/3 of the height of the downcomer.

Preferably, the downcomer is located at 1/2 of the radius of the shell.

Preferably, the inner diameter of the downcomer is 100 mm, and the bottom of the downcomer extends into the position of 150 mm of the conical bottom.

Preferably, the length-diameter ratio of the tower body is 3-8.

Preferably, the cone bottom is of a conical structure, and the conical angle is 50-65 degrees.

Preferably, the medicament injector is located at a distance 1/3 from the top of the housing.

The utility model has the beneficial effects that: the utility model can keep higher desulfurization efficiency under the condition of high air quantity, effectively reduce entrainment, improve demisting efficiency, avoid the problems of medicament loss, pipeline blockage and the like in the operation process, reduce maintenance times and difficulty, and ensure the quality of purified gas and the stability of a desulfurization process.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the downcomer section of the present invention;

FIG. 3 is a top view of a downcomer of the present invention;

FIG. 4 is a cross-sectional view A-A of a downcomer of the present invention;

FIG. 5 is a cross-sectional view B-B of a downcomer of the present invention.

Detailed Description

The following detailed description of specific embodiments of the utility model, taken in conjunction with the accompanying drawings, is not to be taken in a limiting sense.

As shown in fig. 1-5, an evenly distributed high-efficiency wet desulphurization absorption tower comprises a tower body formed by connecting a shell 2 and a conical bottom 15, wherein the lower end of the shell 2 is connected with the conical bottom 15 with a sulfur-rich liquid drainage function, the conical bottom 15 is in a conical structure, the conical angle is 50-65 degrees, and the bottom of the conical bottom 15 is provided with a medicament outlet 16. The top of casing 2 is equipped with gas vent 1, is equipped with manhole 3 on the casing 2. The upper part in the shell 2 is provided with two layers of demisters 4 and two desalted water sprayers 5. The defroster on upper strata is the silk screen defroster in two-layer defroster 4, and the defroster of lower floor is the baffling board defroster, and the interval between the two-layer defroster is 900 mm ~2000 mm (preferred 1400 mm) to reach the highest defogging efficiency. Two desalted water injectors 5 are respectively arranged between the two demisters and below the lower demister, and the two desalted water injectors 5 are respectively connected with two first desalted water inlets 6 on the shell 2. Be equipped with medicament sprayer 8 in the casing 2, medicament sprayer 8 sets up in 1/3 departments apart from casing 2 top, and medicament sprayer 8 links to each other with first medicament import 7 on the casing 2, and 8 below of medicament sprayer are the desulfurization district in the casing 2, connect second medicament import 9 on the casing 2 at desulfurization district middle part.

Be equipped with gas distributor 14 in casing 2, gas distributor 14 installs in casing 2 bottom, and the awl end 15 top, the main pipe of gas distributor 14 connects intake pipe 11, and intake pipe 11 links to each other with casing 2, and the intake pipe 11 import department is equipped with the second demineralized water import 10 that is used for maintaining.

Two downcomers 12 are arranged in the shell 2, the downcomers 12 are symmetrically arranged on two sides of a main pipe of the gas distributor, the position of each downcomer 12 relative to the main pipe is kept unchanged, the inner diameter of each downcomer 12 is 100 mm at the position 1/2 of the radius of the shell, and the bottom of each downcomer 12 extends into the position 15150 mm of the conical bottom. Overflow ports 13 are symmetrically formed in two sides of the upper portion of each downcomer 12, the opening arc length of each overflow port 13 is 1/4 of the circumferential perimeter of the cross section of each downcomer 12, and the opening height of each overflow port 13 is 1/7-1/3 of the height of each downcomer.

The liquid level in the tower body exceeds the bottom height of the overflow port 13, and the foam height of the liquid level does not exceed the top height of the overflow port 13.

The height of the clear liquid layer in the downcomer 12 is not more than 60% of the height of the whole downcomer.

The length-diameter ratio (namely the ratio of the total length of the shell 2 and the conical bottom 15 to the inner diameter of the shell 2) of the tower body is 3-8 (preferably 5.5).

As shown in figure 1, pretreated gas enters the tower body through a gas distributor 14 from a gas inlet pipe 11, a desulfurization agent mainly enters the tower body through a second agent inlet 9, the gas is contacted with the desulfurization agent in a desulfurization area, hydrogen sulfide in the gas is converted into elemental sulfur, the elemental sulfur is discharged into the next process along with the agent at an agent outlet 16 of a cone bottom 15, and an agent injector 7 sprays the agent to the liquid surface of the agent to reduce liquid surface foam. The residual foam on the liquid surface of the medicament and a small amount of sulfur floating upwards enter the downcomer 12 from the overflow port 13, bubbles in the downcomer 13 are broken, and the sulfur sinks into the conical bottom 15 along with the medicament, so that the entrainment amount in the gas is reduced. The purified gas is firstly removed and recovered by the baffle plate demister at the lower layer, most of carried chemical fog drops, sulfur particles and other impurities are removed, then the purified gas discharged from the absorption tower reaches the standard by the wire mesh demister at the upper layer, and the desalted water ejector 5 and the second desalted water inlet 10 regularly clean and maintain corresponding tower internals.

It should be understood that parts of the specification not set forth in detail are well within the prior art. The above examples only describe the preferred embodiments of the present invention, and other preferred embodiments are not described in detail, and the scope of the present invention is not limited thereto, and those skilled in the art should make various changes and modifications to the technical solution of the present invention without departing from the spirit of the present invention, and all such changes and modifications fall within the scope of the present invention as defined by the claims.

Claims (9)

1. A uniform distribution type efficient wet desulphurization absorption tower comprises a tower body formed by connecting a shell (2) and a conical bottom (15), wherein a medicament outlet (16) is formed at the bottom of the conical bottom (15); the top of the shell (2) is provided with a gas vent (1); the device is characterized in that two layers of demisters (4) and two desalting water ejectors (5) are arranged at the upper part in the shell (2), the two desalting water ejectors (5) are respectively arranged between the two layers of demisters and below the lower layer of demisters, and the two desalting water ejectors (5) are respectively connected with two first desalting water inlets (6) on the shell (2); a medicament ejector (8) is arranged in the shell (2), the medicament ejector (8) is connected with a first medicament inlet (7) on the shell (2), and a second medicament inlet (9) is connected on the shell (2) in the middle of the desulfurization area; a gas distributor (14) is arranged at the bottom in the shell (2), a main pipe of the gas distributor (14) is connected with a gas inlet pipe (11), the gas inlet pipe (11) is connected with the shell (2), and a second desalted water inlet (10) is arranged at the inlet of the gas inlet pipe (11); two downcomers (12) are arranged in the shell (2), the downcomers (12) are symmetrically arranged on two sides of a main pipe of the gas distributor, and overflow ports (13) are symmetrically formed in two sides of the upper portion of each downcomer (12).

2. The uniform distribution type efficient wet desulphurization absorption tower according to claim 1, wherein the upper demister in the two demister layers (4) is a wire mesh demister, and the lower demister is a baffle demister.

3. The uniform distribution type efficient wet desulphurization absorption tower according to claim 1 or 2, characterized in that the distance between the two demister (4) is 900 mm-2000 mm.

4. The uniform distribution type high-efficiency wet desulphurization absorption tower according to claim 1, characterized in that the opening arc length of the overflow port (13) is 1/4 of the circumference perimeter of the cross section of the downcomer (12), and the opening height of the overflow port (13) is 1/7-1/3 of the height of the downcomer.

5. The absorption tower according to claim 1, wherein the downcomer (12) is located at 1/2 of the radius of the shell.

6. The uniform distribution type high-efficiency wet desulphurization absorption tower according to claim 1, characterized in that the inner diameter of the downcomer (12) is 100 mm, and the bottom of the downcomer (12) extends into the conical bottom (15) by 150 mm.

7. The uniform distribution type efficient wet desulphurization absorption tower according to claim 1, characterized in that the length-diameter ratio of the tower body is 3-8.

8. The uniform distribution type efficient wet desulphurization absorption tower according to claim 1, wherein the conical bottom (15) has a conical structure, and the conical angle is 50-65 °.

9. The uniform distribution type high-efficiency wet desulphurization absorption tower according to claim 1, wherein the reagent injector (8) is arranged at the top 1/3 of the shell (2).

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