CN207445963U - A kind of high effective flue gas oxidation and denitration tower - Google Patents

Abstract

A high-efficiency flue gas oxidation and denitration tower relates to a flue gas treatment device. The high-efficiency flue gas oxidation denitrification tower divides the inner cavity of the denitrification tower into a flue gas inlet area and a clean flue gas area by setting a partition plate. After the flue gas enters the denitrification slurry pool, the secondary NO phenomenon of conventional oxidation denitrification is eliminated. The utility model has the advantages of reasonable design, simple structure, safety and environmental protection.

Description

A high-efficiency flue gas oxidation denitrification tower

technical field

The utility model relates to a flue gas treatment device, in particular to a high-efficiency flue gas oxidation and denitrification tower.

Background technique

At present, the air quality situation in my country's atmospheric environment is severe. There are persistent haze weather in many places in winter and ozone exceeding the standard in summer, which has a negative impact on the lives of the people. Studies have found that both haze and ozone exceeding standards are related to nitrogen oxides in the air, and nitrogen oxides in the air mainly come from exhaust emissions from facilities such as coal-fired boilers, kilns, and motor vehicles. To this end, the government has successively issued a number of policies, regulations, standards and specifications related to the control of nitrogen oxide emissions, and fully launched the nitrogen oxide treatment project. The nitrogen oxide treatment technology of coal-fired power plant boilers (SCR, SNCR) and motor vehicles (SCR) is mature, and can well control nitrogen oxide emissions. However, because the working conditions of coal-fired industrial boilers, industrial furnaces and other facilities are different from those of power plant boilers, it is difficult to replicate and apply the power plant boiler denitrification technology to industrial boilers and furnaces. Advanced nitrogen oxide purification technology and devices are imminent.

Contents of the invention

Aiming at the deficiencies of the existing technology, the purpose of this utility model is to provide a high-efficiency flue gas oxidation and denitrification tower. The device has a reasonable design, a simple structure, is easy to install and maintain, and saves a lot of manpower and material resources.

The technical solution adopted by the utility model is: a high-efficiency flue gas oxidation denitrification tower, the technical point of which is to include a denitrification tower with a flue gas inlet and an outlet, and a partition plate is arranged on the inner wall of the denitrification tower. The inner cavity of the denitrification tower is divided into a flue gas inlet area and a flue gas clean area, and a denitrification slurry pool for oxidizing and denitrifying the flue gas is provided at the lower part of the flue gas clean area, and one end of the flue gas downcomer passes through the partition plate and is immersed in the In the denitrification slurry tank, the bottom of the flue gas downcomer is provided with a bubble outlet for spraying the flue gas into the denitrification slurry tank, and a demister is also provided near the outlet of the denitrification tower.

In the above scheme, an explosion-proof pipe with an explosion-proof valve is also provided in the denitrification tower. The explosion-proof pipe is plugged into the partition plate. One end of the explosion-proof pipe extends out of the denitrification tower to contact with the air. The plate communicates with the clean flue gas area.

In the above solution, the flue gas downpipe is inserted into the denitrification slurry pool by 150-200 mm.

In the above scheme, an ultraviolet lamp and an aeration tube are also provided in the denitrification slurry tank.

In the above solution, the aeration pipe is set at a distance of 100-150 mm from the bottom of the denitrification slurry tank.

In the above scheme, an oxidation potentiometer and a liquid level gauge are also provided at the bottom of the denitrification tower.

The beneficial effects of the utility model are: the high-efficiency flue gas oxidation denitrification tower divides the inner chamber of the denitrification tower into a flue gas inlet area and a clean flue gas area by setting a partition plate. After the flue gas enters the denitrification slurry pool, the conventional oxidation The phenomenon of secondary NO in denitrification has the advantages of reasonable design, simple structure, safety and environmental protection.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention. For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of a high-efficiency flue gas oxidation and denitrification tower in an embodiment of the present invention;

The serial numbers in the figure are as follows: 1 denitrification tower, 2 flue gas inlet, 3 partition plate, 4 flue gas downpipe, 5 ultraviolet lamp, 6PH meter, 7 oxidation potentiometer, 8 liquid level meter, 9 lye spray inlet, 10 Aeration pipe, 11 demister, 12 outlet, 13 explosion-proof pipe, 14 oxidant catalyst inlet, 15 denitrification slurry tank, 16 air bubble outlet, 17 explosion-proof valve.

Detailed ways

To make the above purpose, features and advantages of the utility model more obvious and easy to understand, the utility model will be further described in detail below in conjunction with the accompanying drawing 1 and specific embodiments.

Example 1:

The high-efficiency flue gas oxidation denitrification tower adopted in this embodiment includes a denitrification tower 1 with a flue gas inlet 2 and an outlet 12, and a partition plate 3 is arranged on the inner wall of the denitrification tower 1, and the partition plate 3 separates the inner cavity of the denitrification tower 1. Separated into a flue gas inlet area and a clean flue gas area, a denitrification slurry pool 15 for oxidizing and denitrifying the flue gas is provided at the lower part of the clean flue gas area. The inside of the slurry pool 15 is 150 mm, and the bottom end of the flue gas downcomer 4 is provided with a bubble outlet 16 for the flue gas to be sprayed into the denitrification slurry pool 15. The position of the outlet 12 is also provided with a mist eliminator 11 .

An explosion-proof pipe 13 with an explosion-proof valve 17 is also provided in the denitrification tower 1. The explosion-proof pipe 13 is plugged on the partition plate 3. One end of the explosion-proof pipe 13 extends out of the denitrification tower 1 to contact with the air. The other end of the explosion-proof pipe 13 One end communicates with the denitrification and clean flue gas area through the partition plate 3 .

An ultraviolet lamp 5 , a pH meter 6 , an oxidation potentiometer 7 , a liquid level meter 8 and an aeration pipe 10 are also arranged in the denitrification slurry tank 15 . The aeration pipe is located 100mm from the bottom of the denitrification slurry tank.

An alkali spray inlet 9 and an oxidant catalyst inlet 14 are also provided at the bottom of the denitrification slurry tank.

In this embodiment, the flue gas treatment process of the high-efficiency flue gas oxidation and denitrification tower is as follows:

After the flue gas from the boiler or kiln is dedusted and desulfurized, it enters the high-efficiency oxidation and denitrification tower under the action of the booster fan. The denitrification tower is a high-efficiency bubbling tower. The flue gas after dedusting and desulfurization first enters the flue gas inlet area in the denitrification tower, and then enters the denitrification slurry pool in the clean flue gas area through the flue gas downpipe. The flue gas downcomer is immersed under the liquid surface, and under the action of the flue gas pressure, the flue gas is discharged from the flue gas downcomer into the slurry pool in the form of bubbles, and the NO in the bubbles contacts with the strong oxidant (hydroxyl-OH) in the slurry to oxidize Reaction, NO is oxidized to NO2, NO2 dissolves in water to form nitric acid, and then the nitric acid reacts with the denitration agent (alkaline substance) outside the denitration tower for neutralization and denitration reaction. After denitrification, the clean flue gas enters the clean flue gas area through the flue gas rising pipe, and then passes through the two-stage demister for demisting, and then exits the denitrification tower.

Example 2:

The difference between this embodiment and Embodiment 1 is that the aeration pipe is set at a distance of 130 mm from the bottom of the denitrification slurry tank. The flue gas downpipe is inserted into the denitrification slurry tank by 180mm.

Example 3:

The difference between this embodiment and Embodiment 1 is that the aeration pipe is set at a distance of 150 mm from the bottom of the denitrification slurry tank. The flue gas downpipe is inserted into the denitrification slurry tank by 200 mm.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (6)

1. A high-efficiency flue gas oxidation denitrification tower is characterized in that it includes a denitrification tower with a flue gas inlet and an outlet, and a partition plate is provided on the inner wall of the denitrification tower, and the partition plate separates the inner cavity of the denitrification tower into smoke inlets. Gas zone and clean flue gas zone, in the lower part of the clean flue gas zone, there is a denitrification slurry pool for the oxidation and denitrification reaction of flue gas. The bottom end is provided with a bubble outlet for spraying flue gas into the denitrification slurry tank, and a demister is also provided near the outlet of the denitrification tower. 2. The high-efficiency flue gas oxidation denitrification tower as claimed in claim 1, characterized in that, an explosion-proof pipe with an explosion-proof valve is also provided in the denitrification tower, the explosion-proof pipe is inserted on the partition plate, and one end of the explosion-proof pipe extends The outside of the denitrification tower is in contact with the air, and the other end of the explosion-proof pipe communicates with the clean flue gas area through the partition plate. 3. The high-efficiency flue gas oxidation and denitrification tower according to claim 1 or 2, characterized in that the flue gas downcomer is inserted into the denitrification slurry pool by 150-200 mm. 4. The high-efficiency flue gas oxidation denitrification tower as claimed in claim 3, characterized in that an ultraviolet lamp and an aeration tube are also provided in the denitrification slurry tank. 5. The high-efficiency flue gas oxidation and denitrification tower according to claim 4, characterized in that, the aeration pipe is arranged at a distance of 100-150 mm from the bottom of the denitrification slurry tank. 6. The high-efficiency flue gas oxidation denitrification tower as claimed in claim 5, characterized in that an oxidation potentiometer and a liquid level gauge are also provided at the bottom of the denitrification tower.