1. A desulfurization tower characterized by: the coal gas inlet extends into the tower body from the side wall of the tower body or the top of the tower body and is vertically downward; the interior of the tower body is sequentially provided with a mist catching filler, a filler and a gas distribution filler from top to bottom; the lower part of the tower body is provided with a circulating desulfurization liquid inlet, a circulating desulfurization liquid outlet and a desulfurization liquid outlet, and the circulating desulfurization liquid inlet is positioned at the bottom of the coal gas inlet.

2. A desulfurization tower according to claim 1, wherein: the tower further comprises manholes, and the manholes are fixedly connected to the side wall of the tower body.

3. A desulfurization tower according to claim 1, wherein: the device also comprises a mist catching filler support, a filler support and a gas distribution filler support; the mist catching filler support is fixedly connected to the inner wall of the tower body and supports the mist catching filler; the filler support is fixedly connected on the inner wall of the tower body and supports the filler; the gas distribution filler support is fixedly connected on the inner wall of the tower body and supports the gas distribution filler and the coal gas inlet.

4. A desulfurization tower according to claim 1, wherein: the mist catching filler cleaning liquid interface is fixedly connected to the tower body and located above the mist catching filler.

5. A desulfurization tower according to claim 1, wherein: the end part of the inlet of the circulating desulfurization solution is provided with a macroporous spray head.

6. A desulfurization tower according to claim 1, wherein: the end part of the coal gas inlet is provided with a rotational flow plate device.

7. A desulfurization tower according to claim 1, wherein: and a circulating desulfurization liquid pump is arranged on a pipeline connecting the circulating desulfurization liquid inlet and the circulating desulfurization liquid outlet.

Background

The wet oxidation desulfurization technique is one of the desulfurization methods widely used in the domestic chemical industry, so the famous thinking that it is a method of absorbing with alkaline solutionReceive H in the gas phase₂S, in the absorption of H₂Elemental sulphur is precipitated from the liquid phase of S by the action of the oxidation catalyst. Thus the technique comprises H₂S is absorbed and oxidized.

With the development of the coking industry, large-scale coke ovens and high-sulfur coal coking become development trends, matched gas facilities are large-sized, and the existing wet oxidation method desulfurizing tower has the phenomenon that the desulfurizing effect is influenced by the uneven distribution of gas at a gas inlet; the increase of the hydrogen sulfide content in the coal gas requires the increase of the treatment capacity of the desulfurizing tower, which leads to the increase of investment.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the desulfurizing tower which has good desulfurizing effect, reduces the content of hydrogen sulfide, reduces the number of high-sulfur coal gas desulfurizing towers or the height of filler, and simultaneously reduces the investment on equipment related to the regeneration of desulfurizing liquid.

In order to achieve the purpose, the invention adopts the following technical scheme:

a desulfurizing tower comprises a tower body, wherein a coal gas outlet is formed in the top of the tower body, and a coal gas inlet extends into the tower body from the side wall or the top of the tower body and is vertically downward; the interior of the tower body is sequentially provided with a mist catching filler, a filler and a gas distribution filler from top to bottom; the lower part of the tower body is provided with a circulating desulfurization liquid inlet, a circulating desulfurization liquid outlet and a desulfurization liquid outlet, and the circulating desulfurization liquid inlet is positioned at the bottom of the coal gas inlet.

The tower further comprises manholes, and the manholes are fixedly connected to the side wall of the tower body.

The device also comprises a mist catching filler support, a filler support and a gas distribution filler support; the mist catching filler support is fixedly connected to the inner wall of the tower body and supports the mist catching filler; the filler support is fixedly connected on the inner wall of the tower body and supports the filler; the gas distribution filler support is fixedly connected on the inner wall of the tower body and supports the gas distribution filler and the coal gas inlet.

The mist catching filler cleaning liquid interface is fixedly connected to the tower body and located above the mist catching filler.

The end part of the inlet of the circulating desulfurization solution is provided with a macroporous spray head.

The end part of the coal gas inlet is provided with a rotational flow plate device.

And a circulating desulfurization liquid pump is arranged on a pipeline connecting the circulating desulfurization liquid inlet and the circulating desulfurization liquid outlet.

Compared with the prior art, the invention has the beneficial effects that:

1. the inlet of the circulating desulfurization solution is positioned at the bottom of the coal gas inlet, and the coal gas is reversely sprayed with the desulfurization solution at the inlet, so that the effect of primary desulfurization is achieved. The whirl plate device of coal gas entry tip carries out the secondary reaction to preliminary desulfurated coal gas and doctor solution, reinforcing desulfurization effect, and outer formula whirl plate is even with coal gas to circumferential direction distribution simultaneously, changes the air current and faces downwards, and the air current does not influence lower part doctor solution liquid level. The content of hydrogen sulfide in the primarily desulfurized coal gas is reduced, the number of high-sulfur coal gas desulfurization towers or the height of filler is reduced, and the investment on equipment related to the regeneration of desulfurization solution is reduced.

2. The end part of the inlet of the circulating desulfurization solution is provided with the macroporous nozzle, the circulating desulfurization solution contains large-particle impurities such as sulfur, salts and the like, and the macroporous nozzle is adopted to ensure that the equipment is not blocked in the spraying process of the circulating desulfurization solution.

3. The invention is provided with the gas distribution filler, and the coal gas passing through the gas distribution filler flows upwards uniformly, thereby meeting the mass transfer requirement of a large-scale coal gas desulfurization tower and ensuring the desulfurization effect.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

In the figure: 1-a tower body; 2-a desulfurizing liquid outlet; 3-a manhole; 4-gas inlet; 5-a coal gas outlet; 6-mist catching filler cleaning liquid interface; 7-mist catching filler; 8-mist catching filler support; 9-desulfurization liquid inlet; 10-a filler; 11-filler support; 12-a gas distribution packing; 13-gas distribution packing support; 14-a swirl plate arrangement; 15-inlet of circulating desulfurizing liquid; 16-outlet of circulating desulfurizing liquid; 17-circulating desulfurization liquid pump.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in figure 1, the desulfurizing tower comprises a tower body 1, wherein a coal gas outlet 5 is arranged at the top of the tower body 1. The gas inlet 4 is L-shaped, the horizontal section of the gas inlet 4 extends into the tower body from the side wall of the tower body, and the vertical section of the gas inlet 4 is positioned on the axis of the tower body 1. The end part of the gas inlet 4 is provided with a rotational flow plate device 14, and the rotational flow plate device 14 adopts an outward-rotating rotational flow plate.

The side wall of the tower body is provided with 4 manholes 3, 3 manholes 3 are positioned above the gas inlet 4, and 1 manhole 3 is positioned below the gas inlet 4. The lower part of the side wall of the tower body is provided with a circulating desulfurization liquid inlet 15, a circulating desulfurization liquid outlet 16 and a desulfurization liquid outlet 2, and the circulating desulfurization liquid inlet 15 is positioned at the bottom of the coal gas inlet 4. The circulating desulfurization liquid inlet 15 and the coal gas inlet 4 form a primary desulfurization device.

A circulating desulfurization liquid pump 17 is arranged on a pipeline connecting the circulating desulfurization liquid inlet 15 and the circulating desulfurization liquid outlet 16. The end part of the circulating desulfurization liquid inlet 15 is provided with a large-hole spray head.

The tower body 1 is internally provided with a mist catching filler 7, a filler 10 and a gas distribution filler 12 in sequence from top to bottom, and also comprises a mist catching filler support 8, a filler support 11 and a gas distribution filler support 13; the mist catching filler support 8 is fixedly connected on the inner wall of the tower body and supports the mist catching filler 7; the filler support 11 is fixedly connected on the inner wall of the tower body and supports the filler 10; the gas distribution filler support 13 is fixedly connected on the inner wall of the tower body and supports the gas distribution filler 12 and the coal gas inlet 4. The gas distribution filler 12 is mainly used for uniformly distributing gas and playing a role in gas-liquid mass transfer.

The tower is characterized by further comprising a mist catching filler cleaning liquid interface 6, wherein the mist catching filler cleaning liquid interface 6 is fixedly connected to the upper portion of the side wall of the tower body 1 and is positioned above the mist catching filler 7.

The working principle and the working process of the invention are as follows:

coal gas is introduced into the tower body 1 from the coal gas inlet 4, the circulating desulfurization liquid from the bottom of the desulfurization tower is sent into the circulating desulfurization liquid inlet 15 by the circulating desulfurization liquid pump 17, the circulating desulfurization liquid sprayed by the large-hole spray head is in reverse contact with the coal gas, the vapor phase and the liquid phase are collided in a high-speed reverse direction, when the momentum of the vapor phase and the liquid phase reaches balance, a highly turbulent foam area is formed, the contact surface area is large, and the contact surfaces are continuously and rapidly updated, so that the effect of efficient desulfurization is achieved.

The circulating desulfurization solution contains large-particle impurities such as sulfur, salts and the like, and a large-hole spray head is adopted to ensure that equipment is not blocked in the spraying process of the circulating desulfurization solution.

The whirl plate device 14 of 4 tip of coal gas entry carries out the secondary reaction to preliminary desulfurization coal gas and doctor solution, reinforcing desulfurization effect, and the outward turning formula whirl plate is even with coal gas to circumference distribution simultaneously, changes the perpendicular downward direction of air current, and the air current does not influence lower part doctor solution liquid level.

After the gas passes upwards through the gas distribution filler 12, the gas is uniformly distributed upwards, and the gas distribution filler layer also plays a role in gas-liquid mass transfer due to the downward desulfurization liquid. The coal gas in the packing layer contacts with the regenerated desulfurizing liquid in the regenerating tower reversely to play the role of mass transfer. The desulfurized coal gas passes through a mist catching filler 7 to remove fog drops in the coal gas, and then is sent to the subsequent working section for treatment.

The coal gas and the desulfurization liquid are reversely sprayed at the inlet, so that the effect of primary desulfurization is achieved. The whirl plate device 14 of 4 tip of coal gas entry carries out the secondary reaction to preliminary desulfurization coal gas and doctor solution, reinforcing desulfurization effect, and the outward turning formula whirl plate is even with coal gas to circumferential direction distribution simultaneously, changes the air current and faces downwards, and the air current does not influence lower part doctor solution liquid level. The content of hydrogen sulfide in the primarily desulfurized coal gas is reduced, the number of high-sulfur coal gas desulfurization towers or the height of filler is reduced, and the investment on equipment related to the regeneration of desulfurization solution is reduced. The invention is provided with the gas distribution filler 12, and the coal gas passing through the gas distribution filler flows upwards uniformly, thereby meeting the mass transfer requirement of a large-scale coal gas desulfurization tower and ensuring the desulfurization effect.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.