CN201394416Y - 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 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 the absorption tower body , the lower part of the absorption tower body is provided with a slurry tank, the middle part is provided with a flue gas inlet, and the upper part is provided with a flue gas outlet, and the absorption tower body is sequentially provided with a slurry spray system and a demister system from the flue gas inlet to the flue gas outlet A rectification device is also provided between the flue gas inlet and the slurry spray system; compared with the prior art, the utility model has the following advantages: a rectification device is provided to make the flue gas in the tower evenly distributed and the gas-liquid mass transfer The effect is good, the height of the absorption tower can be reduced, the number of spray layers and the amount of slurry spray can be reduced, the power consumption of the slurry circulating pump can be reduced, and high desulfurization efficiency can be achieved on the basis of reducing energy consumption.

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 flue gas wet 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 flue gas distribution uniformity 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 in the tower is evenly distributed, 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 an absorption tower body, the bottom of the absorption tower body is provided with a pulp pool, the middle part is provided with a flue gas inlet, and the upper part is provided with a flue gas outlet, A slurry spraying system and a demisting system are sequentially arranged in the absorption tower body from the flue gas inlet to the flue gas outlet, and a rectifying device is also arranged between the flue gas inlet and the slurry spraying system.

Further, the rectification device is a metal grid;

Further, the metal grid is formed by orthogonal arrangement of grid bars, the thickness of the grid bars is 3-5 mm, the width is 30-50 mm, and the distance between parallel and adjacent grid bars is 50-1000 mm;

Further, the rectification device is a metal orifice plate;

Further, the thickness of the metal orifice plate is 2-5mm, and the opening ratio is 30-60%;

Further, the demisting system is provided with two stages, and the slurry spray system is provided with 4 layers;

Further, a stirring device is provided in the slurry tank;

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;

Further, a circulating slurry pump is also included, the inlet of the circulating slurry pump is set in the slurry tank, and the outlet is connected with the slurry spraying system.

Compared with the prior art, the utility model has the following advantages: a rectification device is provided to make the flue gas in the tower evenly distributed, the gas-liquid mass transfer effect is good, the height of the absorption tower can be reduced, the number of spray layers and the amount of slurry spray can be reduced , reduce the power consumption of the slurry circulation pump, and can achieve high 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 Can get teaching from the practice of the present utility model. 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 structural representation of flue gas wet desulfurization absorption tower;

Fig. 2 shows a schematic structural diagram of a rectifying device.

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. The flue gas wet desulfurization absorption tower also includes a circulating slurry pump 6, 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 an oxidation air system. Air pipe 5, the oxidation air pipe 5 is arranged in the slurry tank 12 and is connected with the oxidation blower 3, the best, the oxidation blower 3 selects the Roots type oxidation blower for use; when in use, the CaSO in the pulp tank ₃ is added with air It can be efficiently converted into CaSO ₄ ·2H ₂ O (gypsum) under the action of strong oxidation and stirring device 4.

A rectification device 7 is also provided between the flue gas inlet 1 and the slurry spray system 8. Referring to FIG. The grid bar is 3-5mm thick, 30-50mm wide, and the distance between parallel and adjacent grid bars is 50-1000mm; the rectification device can also be a metal orifice plate, the thickness of the metal orifice plate is 2-5mm, and the opening ratio is 30-60 %.

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 (10)

1. Flue gas wet desulfurization absorption tower, including the absorption tower body, the lower part of the absorption tower body is provided with a slurry pool, the middle part is provided with a flue gas inlet, and the upper part is provided with a flue gas outlet. A slurry spray system and a demister system are sequentially arranged toward the flue gas outlet, and the feature is that a rectification device is also arranged 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 rectification device is a metal grid. 3. The flue gas wet desulfurization absorption tower according to claim 2, characterized in that: the metal grid is formed by orthogonal arrangement of bars, the bars are 3-5 mm thick, 30-50 mm wide, parallel And the distance between adjacent grid bars is 50-1000mm. 4. The flue gas wet desulfurization absorption tower according to claim 1, characterized in that: the rectification device is a metal orifice plate. 5. The flue gas wet desulfurization absorption tower according to claim 4, characterized in that: the metal orifice plate has a thickness of 2-5mm and an opening ratio of 30-60%. 6. The flue gas wet desulfurization absorption tower according to any one of claims 1 to 5, characterized in that: the demisting system is provided with two stages, and the slurry spray system is provided with four layers. 7. The flue gas wet desulfurization absorption tower according to claim 1, characterized in that: a stirring device is arranged in the slurry pool. 8. The flue gas wet desulfurization absorption tower according to claim 1 or 7, characterized in that: the flue gas wet desulfurization absorption tower also includes an oxidation air system, and the oxidation air system includes an oxidation fan and an oxidation air pipe , the oxidation air pipe is set in the slurry tank and connected with the oxidation fan. 9. The flue gas wet desulfurization absorption tower according to claim 8, characterized in that: the oxidation fan is a Roots type oxidation fan. 10. The flue gas wet desulfurization absorption tower according to claim 1, further comprising a circulating slurry pump, the inlet of the circulating slurry pump is set in the slurry tank, and the outlet is connected to the slurry spraying system.

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