Device for increasing ammonia content of desulfurization liquid

Abstract

The utility model discloses a device for increasing ammonia content in desulfurization liquid, which relates to the technical field of coke oven gas purification and 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 is in contact with the compressed air 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 utility model relates to the technical field of coke oven gas purification, in particular to a device for increasing the ammonia content of desulfurization liquid. Background Art

[0002] Currently, the domestic coking industry primarily uses the H·P·F method for desulfurization of coke oven gas. This process utilizes ammonia in the desulfurization liquid to absorb hydrogen sulfide from the coke oven gas. Desulfurization liquid regeneration is an essential step, requiring a large amount of air to come into contact with the desulfurization liquid. This regenerated air removes some of the ammonia from the desulfurization liquid, which is then discharged directly into the atmosphere or burned in the coke oven basement, reducing the ammonia content of the desulfurization liquid. Desulfurization requires sufficient ammonia in the desulfurization liquid to achieve desulfurization, so its ammonia content directly affects desulfurization effectiveness. Utility Model Content

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

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

[0005] The utility model provides a device for increasing the ammonia content of a desulfurization liquid, comprising: a regeneration tower and an ammonia washing absorption tower, the regeneration tower being 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 being used to input desulfurization liquid into the regeneration tower, the compressed air inlet being used to input compressed air into the regeneration tower, the desulfurization liquid and the compressed air being in contact in the regeneration tower; the ammonia washing absorption tower being provided with an air inlet, a water inlet, a water outlet and a regeneration tail gas outlet after ammonia washing, the air inlet being used to be connected to the ammonia-containing regeneration tail gas outlet through a pipeline, the water inlet being used to input water into the ammonia washing absorption tower, the water outlet being connected to the ammonia-containing water inlet through a pipeline and being in communication 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] Compared with the prior art, the utility model has achieved the following technical effects:

[0014] The purpose of the utility model is to provide a device for increasing the ammonia content of the desulfurization liquid. 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 water dissolved in ammonia enters the regeneration tower from the water outlet through the ammonia-containing water inlet to be supplemented to the desulfurization liquid, and the ammonia in the regeneration tail gas is recovered to improve the desulfurization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0016] Figure 1 This is a schematic structural diagram of a device for increasing the ammonia content in desulfurization liquid provided by the utility model;

[0017] 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

[0018] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0019] The purpose of the utility model is to provide a device for increasing the ammonia content of desulfurization liquid to solve the problems existing in the above-mentioned prior art. It has a simple structure, is easy to use, increases the ammonia content of desulfurization liquid, and improves the desulfurization effect.

[0020] 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 implementation methods.

[0021] Example 1

[0022] This embodiment provides a device for increasing the ammonia content of the desulfurization liquid, such as Figure 1 As shown, it includes: 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-containing 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 ammonia washing. The air inlet 8 is used to pass through the ammonia-containing regeneration tail gas outlet. The pipelines are connected and communicated, the water inlet 9 is used to input water into the ammonia washing absorption tower 7, the water outlet 10 is connected and communicated with the ammonia water inlet 6 through a pipeline to replenish the water dissolved in ammonia in the ammonia washing absorption tower 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 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, and the ammonia-dissolved water enters the regeneration tower 1 from the water outlet 10 through the ammonia water inlet 6 to be replenished into the desulfurization liquid, so as to recover the ammonia in the regenerated tail gas and improve the desulfurization effect.

[0023] In a preferred solution of this 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-containing 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 the compressed air in the process from the bottom to the top.

[0024] In a preferred solution 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.

[0025] Example 2

[0026] This embodiment also provides a method for using the device for increasing the ammonia content in the desulfurization liquid as in the first embodiment, comprising the following steps:

[0027] The ammonia-containing regeneration tail gas in regeneration tower 1 flows out of ammonia-containing regeneration tail gas outlet 5, enters ammonia scrubbing and absorption tower 7 through air inlet 8, and dissolves in water entering ammonia scrubbing and absorption tower 7 through water inlet 9. The ammonia-containing water then enters regeneration tower 1 through water outlet 10 and ammonia-containing water inlet 6 to be added to the desulfurization liquid. An additional ammonia scrubbing and absorption tower 7 is added to introduce the regeneration tail gas into the ammonia scrubbing and absorption tower 7. After the ammonia in the tail gas is scrubbed with water and absorbed, the tail gas is released or sent to the coke oven basement for treatment. The ammonia-containing scrubbing water is added to the desulfurization liquid to increase the ammonia content of the desulfurization liquid. The size of the scrubbing tower is determined based on the desulfurization processing capacity.

[0028] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A device for increasing the ammonia content of desulfurization liquid, characterized by: 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. 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. 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. The air inlet is used to be connected to 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 to the ammonia-containing water inlet through a pipeline and communicated 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 in 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 in 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 in desulfurization liquid according to claim 3, characterized in that: The ammonia water inlet is arranged at the bottom of the regeneration tower.

5. The device for increasing the ammonia content in 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 in 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 in desulfurization liquid according to claim 6, characterized in that: The outlet for 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.

8. The device for increasing the ammonia content in 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.

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