CN201454391U - Flue gas wet desulfurization absorption tower - Google Patents

Abstract

The utility model provides a flue gas wet desulfurization absorption tower, the flue gas distribution in the absorption tower is uniform, the gas-liquid mass transfer effect is good, and the desulfurization efficiency is high; the flue gas wet desulfurization absorption tower includes absorption The tower body, the lower part of the absorption tower body is provided with a slurry tank, the slurry tank is provided with a stirring device, the middle part of the absorption tower body is provided with a flue gas inlet, and the upper part is provided with a flue gas outlet. From the flue gas inlet to the flue gas outlet, a slurry spray system and a demisting system are arranged in sequence. The demisting system has two stages, and a shower water system is arranged between the two-stage demisting systems. The flue gas inlet There is also a metal grille between the grout sprinkler system.

Description

Flue gas wet desulfurization absorption tower

technical field

The utility model relates to the technical field of environmental protection engineering, in particular to a desulfurization absorption tower.

Background technique

At present, the impact of air pollution is very serious, especially in the flue gas emitted by industrial boilers, industrial kilns and coal-fired power plants, etc., which contain a large amount of sulfur dioxide, and sulfur dioxide is the main cause of acid rain. Injuries can cause damage to the upper respiratory tract and damage the body's immunity. Therefore, the flue gas discharged by the above-mentioned industrial enterprises needs to be desulfurized. The limestone-gypsum wet flue gas desulfurization process is the most widely used desulfurization process, accounting for about 90% of the market share. The core equipment of this process is the absorption tower. The existing absorption tower has problems such as poor distribution uniformity of flue gas in the tower, unsatisfactory gas-liquid mass transfer effect, high energy consumption of the system, and low desulfurization efficiency.

Utility model content

In view of this, in order to solve the above problems, the utility model provides a flue gas wet desulfurization absorption tower, the flue gas distribution in the absorption tower is uniform, the gas-liquid mass transfer effect is good, and the desulfurization efficiency is high.

The purpose of this utility model is achieved in the following way: the flue gas wet desulfurization absorption tower includes the absorption tower body, the bottom of the absorption tower tower body is provided with a slurry tank, the slurry tank is provided with a stirring device, the absorption tower tower The middle part of the body is provided with a flue gas inlet, and the upper part is provided with a flue gas outlet. The body of the absorption tower is equipped with a slurry spray system and a demisting system in sequence from the flue gas inlet to the flue gas outlet. The demisting system is provided with two stages. A shower water system is set between the two-stage demisting systems, and a metal grill is also set between the flue gas inlet and the slurry spray system.

Further, the metal grid is formed by orthogonal arrangement of grid bars, the thickness of the grid bars is 4-5 mm, the width is 40-50 mm, and the distance between parallel and adjacent grid bars is 50-1000 mm;

Further, the slurry spray system is provided with 4 layers;

Further, the flue gas wet desulfurization absorption tower also includes an oxidation air system, the oxidation air system includes an oxidation fan and an oxidation air pipe, and the oxidation air pipe is arranged in the slurry tank and connected to the oxidation fan;

Further, the oxidation blower is a Roots type oxidation blower.

Compared with the prior art, the utility model has the following advantages: it is provided with a metal grid, which makes the flue gas in the tower evenly distributed, has good gas-liquid mass transfer effect, can reduce the height of the absorption tower, and reduce the number of spray layers And the amount of slurry spraying, reducing the power consumption of the slurry circulation pump, can achieve higher desulfurization efficiency on the basis of reducing energy consumption.

Other advantages, objectives, and features of the present utility model will be set forth in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the investigation and research below, or It can be taught from the practice of utility models. The objectives and other advantages of the utility model can be realized and obtained by the structure particularly pointed out in the following description, claims, and accompanying drawings.

Description of drawings

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 shows the schematic diagram of flue gas wet desulfurization absorption tower;

Fig. 2 shows a schematic structural diagram of a metal grid.

Detailed ways

Preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to Fig. 1, the flue gas wet desulfurization absorption tower of the present embodiment includes an absorption tower body 11, a slurry pool 12 is arranged at the lower part of the absorption tower body 11, and a stirring device 4 is arranged in the slurry pool 12; The middle part of the body 11 is provided with a flue gas inlet 1, and the upper part is provided with a flue gas outlet 2. The absorption tower body 11 is provided with a slurry spray system 8 and a demister system 9 in sequence from the flue gas inlet 1 to the flue gas outlet 2. The demisting system 9 is provided with two stages, and a shower water system 10 is arranged between the two-stage demisting systems 9, and the slurry spraying system is provided with 4 layers, and a circulating slurry pump 6 is arranged outside the flue gas wet desulfurization absorption tower , the inlet of the circulating slurry pump 6 is set in the slurry tank 12, and the outlet is connected to the slurry spray system 8; the flue gas wet desulfurization absorption tower also includes an oxidation air system, and the oxidation air system includes an oxidation fan 3 and Oxidation air pipe 5, described oxidation air pipe 5 is arranged in the stock tank 12 and links to each other with oxidation blower 3, and best, oxidation blower ₃ selects Roots type oxidation blower for use; Under the strong oxidation of air and the action of stirring device 4, it can be efficiently converted into CaSO ₄ ·2H ₂ O (gypsum).

A metal grid 7 is also arranged between the flue gas inlet 1 and the slurry spraying system 8. Referring to FIG. 2, the metal grid 7 is formed by orthogonal arrangement of grid bars, and the thickness of the grid bars is 3-5 mm. The width is 30-50mm, and the distance between parallel and adjacent bars is 50-1000mm.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and equivalent technologies thereof, the utility model is also intended to include these modifications and variations.

Claims (5)

1. The flue gas wet desulfurization absorption tower is characterized in that: it includes an absorption tower body, a slurry tank is arranged at the lower part of the absorption tower body, a stirring device is arranged in the slurry tank, and a middle part of the absorption tower body is provided with The flue gas inlet, the upper part is provided with a flue gas outlet, and the absorption tower is equipped with a slurry spray system and a demister system in sequence from the flue gas inlet to the flue gas outlet. A shower water system is provided between the mist systems, and a metal grill is also provided between the flue gas inlet and the slurry spray system. 2. The flue gas wet desulfurization absorption tower according to claim 1, characterized in that: the metal grid is formed by orthogonal arrangement of grid bars, the grid bars are 4-5 mm thick, 40-50 mm wide, parallel And the distance between adjacent grid bars is 50-1000mm. 3. The flue gas wet desulfurization absorption tower according to claim 1, characterized in that the slurry spraying system is provided with 4 layers. 4. The flue gas wet desulfurization absorption tower according to claim 1, characterized in that: the flue gas wet desulfurization absorption tower also includes an oxidation air system, the oxidation air system includes an oxidation fan and an oxidation air pipe, the The above-mentioned oxidation air pipe is arranged in the slurry tank and connected with the oxidation fan. 5. The flue gas wet desulfurization absorption tower according to claim 4, characterized in that: the oxidation fan is a Roots type oxidation fan.

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