Ammonia retention layer structure and denitrification tower

Abstract

The utility model relates to the technical field of denitration towers, and in particular to an ammonia retention layer structure and a denitration tower. The ammonia retention layer structure and the denitration tower include an absorption tower, which is provided with a flue gas inlet at the bottom and a flue gas outlet at the top; a demisting assembly installed on the absorption tower, wherein the demisting assembly includes a water distribution plate, a corrugated plate and a demisting water receiving plate arranged in sequence; and an anti-escape layer, which is arranged between the flue gas outlet and the demisting assembly, including a tower plate, water is introduced into the tower plate, and a nozzle connected to the tower plate is arranged at the bottom of the tower plate. The purpose of the utility model is to provide a reasonable structure to prevent ammonia from escaping.

Description

Technical Field

[0001] The utility model relates to the technical field of denitration towers, in particular to an ammonia retention layer structure and a denitration tower. Background Art

[0002] SOx and NOx are the main sources of air pollutants, causing great harm to the environment. The flue gas denitrification process is relatively mature, among which the wet process occupies the largest market share. Most of the flue gas denitrification uses the selective catalytic reduction method (SCR), which uses ammonia as a reducing agent to reduce NOx to N2 under the action of a catalyst. During the operation of the ammonia desulfurization and denitrification tower, the last purification component of the exhaust gas in the tower is the anti-escape layer, and the anti-escape layer is equipped with an ammonia capture component. However, in actual operation, the anti-escape layer of the existing technology has a poor effect, resulting in excessive ammonia emissions from the flue gas and blue exhaust gas.

[0003] In the prior art, one of the main reasons for ammonia gas leakage in the ammonia desulfurization process is unreasonable equipment design. For example, improper design of the internal structure of the absorption tower, improper selection of fillers and other factors may lead to the inability of ammonia to be completely absorbed during the desulfurization process, thus causing ammonia gas leakage; or improper operation also leads to ammonia gas leakage. The operator fails to monitor and adjust various parameters in time during the operation, resulting in low desulfurization efficiency, and ammonia gas cannot completely react with sulfur dioxide to form ammonium sulfate, thereby increasing the possibility of ammonia gas leakage; or ammonia gas leakage may also be related to inadequate equipment maintenance. After the equipment has been in operation for a long time, the fillers may age and wear, resulting in the inability of ammonia gas to fully contact the flue gas, thereby increasing the risk of ammonia gas leakage. The inventor has proposed improvements to this. Utility Model Content

[0004] The utility model aims to provide an ammonia retention layer structure and a denitration tower which have a reasonable structure and can prevent ammonia from escaping.

[0005] In order to achieve the above-mentioned utility model object, the utility model provides an ammonia retention layer structure and a denitration tower, characterized in that it includes:

[0006] An absorption tower having a flue gas inlet at the bottom and a flue gas outlet at the top;

[0007] A demisting assembly is installed in the absorption tower, wherein the demisting assembly comprises a water distribution plate, a corrugated plate and a demisting water receiving plate which are arranged in sequence; and

[0008] The anti-escape layer is arranged between the flue gas outlet and the demisting component, and includes a tower plate, water is introduced into the tower plate, and a nozzle connected to the tower plate is arranged at the bottom of the tower plate. The anti-escape layer can effectively prevent ammonia from being completely absorbed during the desulfurization process, thereby causing ammonia to escape.

[0009] The further improvement of the ammonia retention layer structure and the denitration tower of the utility model lies in that the tower tray is a sieve plate tower tray, a tongue plate tower tray or a bubble cap tower tray.

[0010] The further improvement of the ammonia retention layer structure and the denitration tower of the utility model lies in that a partition is arranged below the nozzle, and sieve holes are formed on the partition.

[0011] The further improvement of the ammonia retention layer structure and the denitration tower of the utility model lies in that the sieve holes are evenly distributed on the partition.

[0012] The utility model further improves the ammonia retention layer structure and the denitration tower in that an adjusting disk is rotatably arranged above the partition, and the adjusting disk is provided with adjusting holes. The sieve holes cooperate with the partition to control the amount of spray water, and the water output and the flue gas output can be controlled according to different needs.

[0013] The beneficial effects of the utility model are:

[0014] 1. Setting up an anti-escape layer can effectively prevent ammonia from being completely absorbed during the desulfurization process, thereby causing ammonia escape.

[0015] 2. A partition is arranged below the nozzle, on which sieve holes are formed, and the sieve holes are evenly distributed on the partition. An adjusting disk is rotatably arranged above the partition, and the adjusting disk is provided with adjusting holes. The sieve holes cooperate with the partition to control the amount of spraying water, and the water output and smoke output can be controlled according to different needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model.

[0017] Among them, 1 absorption tower, 11 flue gas inlet, 12 flue gas outlet, 2 defogger assembly, 21 water distribution plate, 22 corrugated plate, 23 defogger water receiving plate, 3 anti-overflow layer, 31 tower plate, 32 nozzle, 33 partition, 331 sieve hole, 34 adjusting plate, 341 adjusting hole. DETAILED DESCRIPTION

[0018] The present invention is further explained below in conjunction with specific implementation methods. It should be understood that these implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] like Figure 1As shown, an ammonia retention layer structure and a denitration tower, characterized in that they include:

[0021] The absorption tower 1 has a flue gas inlet 11 at the bottom and a flue gas outlet 12 at the top;

[0022] A demisting assembly 2, which is installed in the absorption tower, wherein the demisting assembly comprises a water distribution plate 21, a corrugated plate 22 and a demisting water receiving plate 23 which are arranged in sequence; and

[0023] The anti-escape layer 3 is arranged between the flue gas outlet and the demisting assembly, and includes a tray 31, into which water is introduced, and a nozzle 32 connected to the tray is arranged at the bottom of the tray. The anti-escape layer can effectively prevent ammonia from being completely absorbed during the desulfurization process, thereby causing ammonia to escape.

[0024] Specifically, the tower tray is a sieve plate tower tray, a tongue plate tower tray or a bubble cap tower tray.

[0025] Specifically, a partition 33 is provided below the nozzle, and a sieve hole 331 is formed on the partition.

[0026] Specifically, the sieve holes are evenly distributed on the partition.

[0027] Specifically, an adjusting disk 34 is rotatably arranged above the partition, and the adjusting disk is provided with adjusting holes 341. The mesh holes cooperate with the partition to control the amount of spray water, and the water output and smoke output can be controlled according to different needs.

[0028] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An ammonia retention layer structure and a denitration tower, characterized in that: include: An absorption tower having a flue gas inlet at the bottom and a flue gas outlet at the top; A demisting assembly installed in the absorption tower, wherein the demisting assembly comprises a water distribution plate, a corrugated plate and a demisting water receiving plate which are arranged in sequence; and The anti-escape layer is arranged between the smoke outlet and the defogger assembly, and comprises a tower plate, water is introduced into the tower plate, a nozzle connected to the tower plate is arranged at the bottom of the tower plate, a partition is arranged below the nozzle, sieve holes are formed on the partition, the sieve holes are evenly distributed on the partition, and an adjusting disk is rotatably arranged above the partition, and the adjusting disk is provided with adjusting holes.

2. The ammonia retention layer structure and denitration tower according to claim 1, characterized in that: The tower tray is a sieve plate tower tray, a tongue plate tower tray or a bubble cap tower tray.

Images