CN215506329U

CN215506329U - Boiler tail gas desulfurization system

Info

Publication number: CN215506329U
Application number: CN202122446167.9U
Authority: CN
Inventors: 王宝伟; 江庆华
Original assignee: Wuxi Gelinjia Technology Co ltd
Current assignee: Wuxi Gelinjia Technology Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-01-14
Anticipated expiration: 2031-10-09

Abstract

The utility model relates to a boiler tail gas desulfurization system, which comprises an alkali liquor tank; a liquid outlet is formed in one side of the alkali liquor tank and is communicated with a first metal hose through a pipeline, and a pressure pump and a Y-shaped filter are mounted on the pipeline; the first metal hose is connected with an inlet of the spray gun; the inlet of the spray gun is also connected with a second metal hose which is communicated with a compressed air pipe. The utility model can effectively improve the reaction rate and the reaction efficiency.

Description

Boiler tail gas desulfurization system

Technical Field

The utility model relates to the technical field of boiler tail gas treatment devices, in particular to a boiler tail gas desulfurization system.

Background

In the field of boiler tail gas desulfurization treatment at present, methods and modes are diversified, such as dry desulfurization in a furnace, rear-end wet desulfurization, flue dry desulfurization and the like.

But all have the disadvantages of uneven distribution, low reaction efficiency, large raw material consumption and high operation cost, for example, dry desulfurization in a furnace;

or back-end wet desulphurization, the gas and liquid contact needs to be fully considered to improve the reaction efficiency, so that the size of the desulphurization tower is large, the occupied area is large, the system is complex, the initial investment is large and the like; meanwhile, wastewater is generated in the process and needs secondary treatment. The dry desulfurization of the flue has the defects of low reaction efficiency, large pressure of a rear-end dust removal system and the like.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model discloses a boiler tail gas desulfurization system.

The technical scheme adopted by the utility model is as follows:

a boiler tail gas desulfurization system comprises an alkali liquor tank; a liquid outlet is formed in one side of the alkali liquor tank and is communicated with a first metal hose through a pipeline, and a pressure pump and a Y-shaped filter are mounted on the pipeline; the first metal hose is connected with an inlet of the spray gun; the inlet of the spray gun is also connected with a second metal hose, and the second metal hose is communicated with a compressed air pipe.

The method is further technically characterized in that: and an emptying valve is arranged at the bottom of the lye tank.

The method is further technically characterized in that: and a breather valve is arranged at the top of the lye tank.

The method is further technically characterized in that: and the other side of the alkali liquor tank is provided with a liquid level upper limit port and a liquid level lower limit port, and the liquid level upper limit port and the liquid level lower limit port are both communicated with a liquid level meter.

The method is further technically characterized in that: and an overflow port is formed in the other side of the alkali liquor tank, and an overflow valve is installed at the overflow port.

The method is further technically characterized in that: at least one overhaul shut-off valve is arranged on the pipeline.

The method is further technically characterized in that: and the pipeline is provided with a check valve.

The method is further technically characterized in that: and a compressed air cut-off valve is arranged on the compressed air pipe.

The method is further technically characterized in that: the spray gun is arranged in a boiler, and the boiler is provided with a sulfur dioxide monitoring instrument.

The utility model has the following beneficial effects:

according to the utility model, the liquid alkali liquor pressurized by the pressure pump is sprayed into the high-temperature flue through the atomizing spray gun under the cooperation of the compressed air through the alkali liquor storage tank, and the atomized alkali liquor can be fully contacted with the flue gas, so that the reaction rate is increased, and further the efficiency is increased.

Reaction products are intercepted by a rear end dust remover and are taken out of the system along with ash. The utility model greatly improves the reaction efficiency and saves the operation cost through pressurized atomization; compared with a simple system, the system has the advantages of low energy consumption, small occupied area, low equipment maintenance amount and the like.

Drawings

FIG. 1 is a schematic diagram of the present invention.

In the figure: 1. an evacuation valve; 2. a liquid level meter; 3. a breather valve; 4. an alkali liquor tank; 5. alkali liquor; 6. an overflow valve; 7. overhauling a cut-off valve; 8. a check valve; 9. a pressure pump; 10. a pipeline; 11. a compressed air shut-off valve; 121. a first metal hose; 122. a second metal hose; 13. a spray gun; 14. a sulfur dioxide monitoring instrument; 15. and a Y-shaped filter.

Detailed Description

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Therefore, the directional terminology used is for the purpose of describing, but not limiting, the utility model, and moreover, like reference numerals designate like elements throughout the embodiments.

The following describes a specific embodiment of the present embodiment with reference to the drawings.

FIG. 1 is a schematic diagram of the present invention. As shown in FIG. 1, the boiler tail gas desulfurization system comprises an alkali liquor tank 4. A liquid outlet is formed in one side of the alkali liquor tank 4 and is communicated with a first metal hose 121 through a pipeline 10, and a pressure pump 9 and a Y-shaped filter 15 are installed on the pipeline 10. The Y-filter 15 is a small device for removing a small amount of solid particles from a liquid, and can protect the normal operation of the device, when the fluid enters a filter cartridge with a certain size of filter screen, the impurities are blocked, and the clean filtrate is discharged from the filter outlet.

The first metal hose 121 is connected to an inlet of the spray gun 13. The inlet of the spray gun 13 is also connected with a second metal hose 122, and the second metal hose 122 is communicated with a compressed air pipe. The compressed air pipe is provided with a compressed air cut-off valve 11.

The top of the lye tank 4 is provided with a breather valve 3, and the breather valve 3 not only ensures that the space in the lye tank 4 is isolated from the atmosphere within a certain pressure range, but also can be communicated with the atmosphere (breathes) when the pressure exceeds or is lower than the pressure range. The function of the device is to prevent the storage tank from being damaged due to overpressure or vacuum, and simultaneously, the evaporation loss of the stored liquid can be reduced. An emptying valve 1 is arranged at the bottom of the lye tank 4, and the emptying valve 1 can automatically discharge air.

The other side of the lye tank 4 is provided with a liquid level upper limit port and a liquid level lower limit port which are both communicated with the liquid level meter 2.

The other side of the lye tank 4 is provided with an overflow port which is provided with an overflow valve 6. The overflow valve 6 plays a safety protection role in the boiler tail gas desulfurization system. When the pressure of the boiler tail gas desulfurization system exceeds a specified value, the overflow valve 6 is opened, and a part of gas in the system is discharged into the atmosphere, so that the pressure of the system does not exceed an allowable value, and the system is ensured not to have accidents due to overhigh pressure.

At least one service shut-off valve 7 is mounted on the pipeline 10. In this embodiment, two maintenance shut-off valves 7 are installed on the pipeline 10, and the two maintenance shut-off valves 7 are installed in front of and behind the pressure pump 9 respectively.

The pipeline 10 is provided with a check valve 8. The check valve 8 automatically opens and closes the valve clack by the flow of the medium, and is used for preventing the medium from flowing backwards, and the check valve 8 only allows the medium to flow towards one direction and prevents the medium from flowing towards the opposite direction.

The lance 13 is installed in a boiler, which is equipped with a sulfur dioxide monitoring instrument 14. The sulfur dioxide monitoring device 14 is a commercially available product, and a person skilled in the art can select the model of the sulfur dioxide monitoring device 14 as required.

The working principle of the utility model is as follows:

the alkali liquor 5 is stored in the alkali liquor tank 4, the alkali liquor 5 is pressurized by a pressurizing pump 9 and is conveyed to a spray gun 13 through a pipeline 10, and meanwhile, compressed air is introduced into the spray gun 13 to atomize and spray the alkali liquor into a flue. In-process, for controlling the running cost better, force (forcing) pump 9 is chain with sulfur dioxide monitoring instrument 14, and force (forcing) pump 9 can carry out frequency conversion control, quantitative transport alkali lye according to the demand volume.

A Y-shaped filter 15 is arranged in front of the booster pump 9 to protect the booster pump 9 from being damaged by impurities; the back end is provided with a check valve 8 to prevent the alkali liquor 5 from flowing backwards; maintenance trip valves 7 are arranged at the front and the rear of the pressure pump 9, so that maintenance and repair are convenient. The compressed air pipeline is provided with a compressed air cut-off valve 11, so that the maintenance and the overhaul as well as the air quantity regulation are convenient. The spray gun 13 is connected with the pipeline 10 through the first metal hose 121, and the spray gun 13 is connected with the compressed air pipeline through the second metal hose 122, so that the installation and maintenance are convenient, and finally the desulfurization of the boiler tail gas is completed.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The foregoing description is illustrative of the present invention and is not to be construed as limiting the utility model, which is defined by the scope of the appended claims, as the utility model may be modified in any manner without departing from the essential structure thereof.

Claims

1. The utility model provides a boiler tail gas desulfurization system which characterized in that: comprises an alkali liquor tank (4); a liquid outlet is formed in one side of the alkali liquor tank (4), the liquid outlet is communicated with a first metal hose (121) through a pipeline (10), and a pressure pump (9) and a Y-shaped filter (15) are mounted on the pipeline (10); the first metal hose (121) is connected with an inlet of the spray gun (13); the inlet of the spray gun (13) is also connected with a second metal hose (122), and the second metal hose (122) is communicated with a compressed air pipe.

2. The boiler tail gas desulfurization system according to claim 1, characterized in that: and an emptying valve (1) is arranged at the bottom of the alkali liquor tank (4).

3. The boiler tail gas desulfurization system according to claim 1, characterized in that: and a breather valve (3) is arranged at the top of the lye tank (4).

4. The boiler tail gas desulfurization system according to claim 1, characterized in that: and a liquid level upper limit port and a liquid level lower limit port are formed in the other side of the alkali liquor tank (4), and the liquid level upper limit port and the liquid level lower limit port are both communicated with a liquid level meter (2).

5. The boiler tail gas desulfurization system according to claim 1, characterized in that: and an overflow port is formed in the other side of the alkali liquor tank (4), and an overflow valve (6) is installed at the overflow port.

6. The boiler tail gas desulfurization system according to claim 1, characterized in that: at least one service shut-off valve (7) is arranged on the pipeline (10).

7. The boiler tail gas desulfurization system according to claim 1, characterized in that: and a check valve (8) is arranged on the pipeline (10).

8. The boiler tail gas desulfurization system according to claim 1, characterized in that: and a compressed air shut-off valve (11) is arranged on the compressed air pipe.

9. The boiler tail gas desulfurization system according to claim 1, characterized in that: the spray gun (13) is arranged in a boiler, and the boiler is provided with a sulfur dioxide monitoring instrument (14).