Device for increasing ammonia content of desulfurization liquid and use method

Abstract

The invention discloses a device for increasing the ammonia content of desulfurization liquid and a use method, and relates to the technical field of coke oven gas purification, the device comprises a regeneration tower and an ammonia washing absorption tower, the regeneration tower is provided with a desulfurization liquid inlet, a desulfurization liquid outlet, a compressed air inlet, an ammonia-containing regeneration tail gas outlet and an ammonia-containing water inlet, the desulfurization liquid inlet is used for inputting desulfurization liquid into the regeneration tower, the compressed air inlet is used for inputting compressed air into the regeneration tower, and the desulfurization liquid and the compressed air are in contact in the regeneration tower; the ammonia washing absorption tower is provided with a gas inlet, a water inlet, a water outlet and an ammonia-washed regenerated tail gas outlet, the gas inlet is used for being connected and communicated with the ammonia-containing regenerated tail gas outlet through a pipeline, and the water inlet is used for inputting water into the ammonia washing absorption tower; the water outlet is connected and communicated with the ammonia-containing water inlet through a pipeline so as to supplement ammonia-dissolved water in the ammonia washing absorption tower into the regeneration tower, the structure is simple, the use is convenient, the ammonia content of the desulfurization liquid is increased, and the desulfurization effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coke oven gas purification, and in particular to a device for increasing the ammonia content of desulfurization liquid and a use method thereof. Background Art

[0002] At present, in the process of coke oven gas purification in the domestic coking industry, H·P·F desulfurization is mostly used. In the desulfurization process, ammonia in the desulfurization liquid is used to absorb hydrogen sulfide in the coke oven gas. Desulfurization liquid regeneration is an indispensable link. Regeneration requires a large amount of air to contact the desulfurization liquid. The regenerated air will take away part of the ammonia in the desulfurization liquid and directly discharge it into the atmosphere or send it to the coke oven basement for combustion, resulting in a decrease in the ammonia content of the desulfurization liquid. The desulfurization liquid must rely on sufficient ammonia to desulfurize, so the ammonia content of the desulfurization liquid directly affects the desulfurization effect. Summary of the invention

[0003] The purpose of the present invention is to provide a device for increasing the ammonia content of desulfurization liquid and a method for using the device to solve the problems existing in the above-mentioned prior art. The device has a simple structure, is easy to use, increases the ammonia content of the desulfurization liquid, and improves the desulfurization effect.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a device for increasing the ammonia content of desulfurization liquid, comprising: a regeneration tower and an ammonia washing absorption tower, wherein the regeneration tower is provided with a desulfurization liquid inlet, a desulfurization liquid outlet, a compressed air inlet, an ammonia-containing regeneration tail gas outlet and an ammonia-containing water inlet, wherein the desulfurization liquid inlet is used to input desulfurization liquid into the regeneration tower, and the compressed air inlet is used to input compressed air into the regeneration tower, and the desulfurization liquid and the compressed air are in contact in the regeneration tower; the ammonia washing absorption tower is provided with an air inlet, a water inlet, a water outlet and a post-ammonia washing regeneration tail gas outlet, wherein the air inlet is used to be connected and communicated with the ammonia-containing regeneration tail gas outlet through a pipeline, the water inlet is used to input water into the ammonia washing absorption tower, and the water outlet is connected and communicated with the ammonia-containing water inlet through a pipeline so as to replenish the water dissolved in ammonia in the ammonia washing absorption tower into the regeneration tower.

[0006] Preferably, the desulfurization liquid inlet is arranged at the bottom of the regeneration tower.

[0007] Preferably, the compressed air inlet is arranged at the bottom of the regeneration tower.

[0008] Preferably, the ammonia water inlet is arranged at the bottom of the regeneration tower.

[0009] Preferably, the ammonia-containing regeneration tail gas outlet is arranged at the top of the regeneration tower.

[0010] Preferably, the desulfurization liquid outlet is arranged at the top of the regeneration tower.

[0011] Preferably, the outlet of the regenerated tail gas after ammonia washing is arranged at the top of the ammonia washing absorption tower, and the air inlet is arranged at the bottom of the ammonia washing absorption tower.

[0012] Preferably, the water inlet is arranged at the top of the ammonia washing absorption tower, and the water outlet is arranged at the bottom of the ammonia washing absorption tower.

[0013] The present invention also provides a method for using the device for increasing the ammonia content of desulfurization liquid as described in any one of the above items, comprising the following steps:

[0014] The ammonia-containing regeneration tail gas in the regeneration tower flows out from the ammonia-containing regeneration tail gas outlet, enters the ammonia washing absorber through the air inlet, and dissolves in the water entering the ammonia washing absorber from the water inlet. The ammonia-dissolved water enters the regeneration tower from the water outlet through the ammonia water inlet to be added to the desulfurization liquid.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The purpose of the present invention is to provide a device for increasing the ammonia content in desulfurization liquid and a method for using the device. The ammonia-containing regeneration tail gas in the regeneration tower flows out from the ammonia-containing regeneration tail gas outlet, enters the ammonia washing absorption tower through the air inlet, and is dissolved in the water entering the ammonia washing absorption tower from the water inlet. The ammonia-dissolved water enters the regeneration tower from the water outlet through the ammonia water inlet to be supplemented in the desulfurization liquid, and the ammonia in the regeneration tail gas is recovered to improve the desulfurization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a device for increasing the ammonia content of desulfurization liquid provided by the present invention;

[0019] In the figure: 1. Regeneration tower; 2. Desulfurization liquid inlet; 3. Desulfurization liquid outlet; 4. Compressed air inlet; 5. Ammonia-containing regeneration tail gas outlet; 6. Ammonia water inlet; 7. Ammonia washing absorption tower; 8. Air inlet; 9. Water inlet; 10. Water outlet; 11. Regeneration tail gas outlet after ammonia washing. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The purpose of the present invention is to provide a device for increasing the ammonia content of desulfurization liquid and a method for using the device to solve the problems existing in the above-mentioned prior art. The device has a simple structure, is easy to use, increases the ammonia content of the desulfurization liquid, and improves the desulfurization effect.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Embodiment 1

[0024] This embodiment provides a device for increasing the ammonia content of the desulfurization liquid, such as Figure 1 As shown, it comprises: a regeneration tower 1 and an ammonia washing absorption tower 7. The regeneration tower 1 is provided with a desulfurization liquid inlet 2, a desulfurization liquid outlet 3, a compressed air inlet 4, an ammonia-containing regeneration tail gas outlet 5 and an ammonia water inlet 6. The desulfurization liquid inlet 2 is used to input desulfurization liquid into the regeneration tower 1, and the compressed air inlet 4 is used to input compressed air into the regeneration tower 1. The desulfurization liquid and the compressed air are in contact in the regeneration tower 1; the ammonia washing absorption tower 7 is provided with an air inlet 8, a water inlet 9, a water outlet 10 and a regeneration tail gas outlet 11 after washing with ammonia. The air inlet 8 is used to contact the ammonia-containing regeneration tail gas outlet through The pipelines are connected and communicated, the water inlet 9 is used to input water into the ammonia washing absorber 7, the water outlet 10 is connected and communicated with the ammonia water inlet 6 through a pipeline so as to replenish the water dissolved in ammonia in the ammonia washing absorber 7 into the regeneration tower 1, the ammonia-containing regenerated tail gas in the regeneration tower 1 flows out from the ammonia-containing regenerated tail gas outlet 5, enters the ammonia washing absorber 7 through the air inlet 8 and dissolves in the water entering the ammonia washing absorber 7 from the water inlet 9, the ammonia-dissolved water enters the regeneration tower 1 from the water outlet 10 through the ammonia water inlet 6 to be replenished in the desulfurization liquid, the ammonia in the regenerated tail gas is recovered, and the desulfurization effect is improved.

[0025] In a preferred scheme of the present embodiment, the desulfurization liquid inlet 2 is arranged at the bottom of the regeneration tower 1, the compressed air inlet 4 is arranged at the bottom of the regeneration tower 1, the ammonia water inlet 6 is arranged at the bottom of the regeneration tower 1, the ammonia-containing regenerated tail gas outlet 5 is arranged at the top of the regeneration tower 1, and the desulfurization liquid outlet 3 is arranged at the top of the regeneration tower 1. The desulfurization liquid and the ammonia-dissolved water are mixed and then contacted with the compressed air. The desulfurization liquid, the ammonia-dissolved water and the compressed air can fully contact with the compressed air in the process from the bottom to the top.

[0026] In a preferred scheme of this embodiment, the outlet 11 of the regenerated tail gas after ammonia washing is arranged at the top of the ammonia washing absorption tower 7, the air inlet 8 is arranged at the bottom of the ammonia washing absorption tower 7, the water inlet 9 is arranged at the top of the ammonia washing absorption tower 7, and the water outlet 10 is arranged at the bottom of the ammonia washing absorption tower 7, so that the ammonia can be fully dissolved in the water.

[0027] Embodiment 2

[0028] This embodiment also provides a method for using the device for increasing the ammonia content of desulfurization liquid as in Embodiment 1, comprising the following steps:

[0029] The ammonia-containing regenerated tail gas in the regeneration tower 1 flows out from the ammonia-containing regeneration tail gas outlet 5, enters the ammonia washing absorption tower 7 through the air inlet 8, and dissolves in the water entering the ammonia washing absorption tower 7 from the water inlet 9. The water containing ammonia enters the regeneration tower 1 from the water outlet 10 through the ammonia-containing water inlet 6 to be added to the desulfurization liquid. An ammonia washing absorption tower 7 is added to introduce the regenerated tail gas into the ammonia washing absorption tower 7. After washing and absorbing the ammonia in the tail gas with water, the tail gas is released or sent to the coke oven basement for treatment. The ammonia-containing washing water is added to the desulfurization liquid to increase the ammonia content of the desulfurization liquid. The size of the washing tower is determined according to the desulfurization processing capacity.

[0030] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A device for increasing the ammonia content of desulfurization liquid, characterized in that: include: A regeneration tower, wherein the regeneration tower is provided with a desulfurization liquid inlet, a desulfurization liquid outlet, a compressed air inlet, an ammonia-containing regeneration tail gas outlet and an ammonia-containing water inlet, wherein the desulfurization liquid inlet is used to input desulfurization liquid into the regeneration tower, and the compressed air inlet is used to input compressed air into the regeneration tower, and the desulfurization liquid and the compressed air are in contact in the regeneration tower; An ammonia washing absorption tower is provided with an air inlet, a water inlet, a water outlet and a regenerated tail gas outlet after ammonia washing, wherein the air inlet is used to be connected and communicated with the ammonia-containing regenerated tail gas outlet through a pipeline, the water inlet is used to input water into the ammonia washing absorption tower, and the water outlet is connected and communicated with the ammonia-containing water inlet through a pipeline so as to replenish the water dissolved in ammonia in the ammonia washing absorption tower into the regeneration tower.

2. The device for increasing the ammonia content of desulfurization liquid according to claim 1, characterized in that: The desulfurization liquid inlet is arranged at the bottom of the regeneration tower.

3. The device for increasing the ammonia content of desulfurization liquid according to claim 2, characterized in that: The compressed air inlet is arranged at the bottom of the regeneration tower.

4. The device for increasing the ammonia content of desulfurization liquid according to claim 3 is characterized in that: The ammonia water inlet is arranged at the bottom of the regeneration tower.

5. The device for increasing the ammonia content of desulfurization liquid according to claim 4, characterized in that: The ammonia-containing regeneration tail gas outlet is arranged at the top of the regeneration tower.

6. The device for increasing the ammonia content of desulfurization liquid according to claim 5, characterized in that: The desulfurization liquid outlet is arranged at the top of the regeneration tower.

7. The device for increasing the ammonia content of desulfurization liquid according to claim 6, characterized in that: The outlet for regenerated tail gas after ammonia washing is arranged at the top of the ammonia washing absorption tower, and the air inlet is arranged at the bottom of the ammonia washing absorption tower.

8. The device for increasing the ammonia content of desulfurization liquid according to claim 7, characterized in that: The water inlet is arranged at the top of the ammonia washing absorption tower, and the water outlet is arranged at the bottom of the ammonia washing absorption tower.

9. A method for using the device for increasing the ammonia content in desulfurization liquid according to any one of claims 1 to 8, characterized in that: The following steps are involved: The ammonia-containing regeneration tail gas in the regeneration tower flows out from the ammonia-containing regeneration tail gas outlet, enters the ammonia washing absorber through the air inlet, and dissolves in the water entering the ammonia washing absorber from the water inlet. The ammonia-dissolved water enters the regeneration tower from the water outlet through the ammonia water inlet to be added to the desulfurization liquid.

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