Atmospheric storage tank top waste gas collection and treatment system

Abstract

An atmospheric storage tank top waste gas collection and treatment system comprises a collection header pipe, the front end of the collection header pipe is connected with a separator storage tank breathing gas pipeline and a tar sewage tank breathing gas pipeline, the rear end of the collection header pipe is connected with a breathing gas tank, a washing spraying device is arranged in the breathing gas tank, and a separator is arranged at the top of the breathing gas tank. One end of the Roots blower is connected with the breathing gas tank through a blower input pipeline, the other end of the Roots blower is connected with the boiler incineration device through a blending combustion pipeline, and the boiler incineration device is connected with the filter through a boiler discharge pipeline. The water washing spraying device is arranged in the breathing gas tank, ammonia compounds in the breathing gas tank are greatly removed by adopting atomized effluent, formation of ammonium bicarbonate is reduced from the source, pipeline blockage is prevented, gas at an outlet of the Roots blower is fed into a boiler incineration device for blending combustion, and combustible gas such as hydrogen sulfide and methane is recycled.

Description

Technical Field

[0001] The utility model relates to the field of crushed coal pressurized gasification and coal gas-water separation technology, in particular to a waste gas collection and treatment system at the top of a normal pressure storage tank. Background Art

[0002] The gas-water separation unit for crushed coal pressurized gasification typically uses a cooling, decompression, expansion, and gravity settling process to separate coal dust, dissolved gas, and tar from the gas-water. Wastewater generated during the crushed coal pressurized gasification process is washed and cooled before entering the gas-water separation unit. The flashed gas-water enters atmospheric pressure storage tanks for separation, oil removal, and dust removal. Some dissolved waste gases are volatilized in each atmospheric pressure storage tank and then fed to downstream units for co-combustion. During the gasification process, the volatilized waste gases from the atmospheric pressure storage tanks contain carbon dioxide and ammonia. Due to the ambient temperature of the pipeline, crystallization of ammonia and carbon dioxide can clog the pipeline. Furthermore, prolonged operation can cause condensation within the pipeline, leading to a liquid seal and affecting the normal operation of downstream units. During actual operation, the waste gas contains carbon dioxide, ammonia, and water vapor. When the temperature is below 58°C, ammonium carbonate or ammonium carbonate crystals form. This crystallization is eliminated above 60°C. Due to frequent pipeline blockages and the frequent presence of liquid, the pipeline requires regular weekly cleaning. During this cleaning, volatile organic waste gases are discharged locally, polluting the environment. Utility Model Content

[0003] In order to solve the defects of existing waste gas pipelines being blocked by carbon dioxide and ammonia crystals, the acid washing method having poor washing effect and serious corrosion to equipment, and the direct injection method being difficult to install, the purpose of this utility model is to provide a waste gas collection and treatment system at the top of an atmospheric pressure storage tank.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a waste gas collection and treatment system at the top of a normal pressure storage tank, including a collection main pipe 1, a separator storage tank breathing air pipeline 2, a tar sewage tank breathing air pipeline 3, a nitrogen self-regulating valve 4, a breathing air tank 5, a separator 6, a water washing spray device 7, a discharge pipeline I8, a fan input pipeline 9, a Roots blower 10, a blending pipeline 11, a boiler incineration device 12, a boiler discharge pipeline 13, a filter 14, and a discharge pipeline II 15.

[0005] The front end of the collecting main pipe 1 is connected to the separator storage tank breathing air pipeline 2 and the tar sewage tank breathing air pipeline 3, and the rear end is connected to the breathing air tank 5. The nitrogen self-supporting regulating valve 4 is located on the collecting main pipe 1.

[0006] A water washing spray device 7 is provided in the breathing air tank 5 , a separator 6 is provided on the top of the breathing air tank 5 , and a discharge pipeline I 8 is provided at the bottom of the breathing air tank 5 .

[0007] One end of the Roots blower 10 is connected to the breathing gas tank 5 through the blower input pipeline 9, and the other end is connected to the boiler incineration device 12 through the mixing and burning pipeline 11.

[0008] The boiler incineration device 12 is connected to the filter 14 through a boiler discharge pipeline 13. A discharge pipeline II 15 is provided at the bottom of the filter 14. The filter 14 is an activated carbon filter.

[0009] Compared with the existing method of collecting and treating waste gas from the top of atmospheric pressure storage tanks, the utility model has the following advantages.

[0010] The utility model discloses a waste gas collection and treatment system on the top of a normal pressure storage tank. By arranging a water washing spray device 7 in a breathing gas tank 5, ammonia compounds in the breathing gas tank 5 are greatly removed by atomized water, thereby reducing the formation of ammonium carbonate from the source and preventing pipeline blockage.

[0011] The utility model discloses a waste gas collection and treatment system on the top of a normal pressure storage tank. Gas at the outlet of a Roots blower 10 is sent to a boiler incineration device 12 for mixed combustion, so that combustible gases such as hydrogen sulfide and methane are recycled.

[0012] The utility model provides a waste gas collection and treatment system on the top of a normal pressure storage tank. The filter 14 further filters the gas to remove a small amount of harmful gas that is not reused, which is beneficial to environmental improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a process flow chart of a waste gas collection and treatment system on the top of a normal pressure storage tank in the utility model. DETAILED DESCRIPTION

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] In the description of the present invention, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle", "inside", "top", "bottom end", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified or limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense, for example, they can mean fixed connection, detachable connection, or integral connection; they can mean mechanical connection or electrical connection; they can mean direct connection, indirect connection through an intermediate medium, or internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] The present invention will be described in further detail below with reference to the accompanying drawings.

[0017] like Figure 1 As shown, the utility model is a waste gas collection and treatment system for the top of an atmospheric pressure storage tank, including a collection main pipe 1, a separator storage tank breathing air pipeline 2, a tar sewage tank breathing air pipeline 3, a nitrogen self-regulating valve 4, a breathing air tank 5, a separator 6, a water washing spray device 7, a discharge pipeline I8, a fan input pipeline 9, a Roots blower 10, a blending pipeline 11, a boiler incineration device 12, a boiler discharge pipeline 13, a filter 14, and a discharge pipeline II 15.

[0018] The front end of the collecting main pipe 1 is connected to the separator storage tank breathing air pipeline 2 and the tar sewage tank breathing air pipeline 3, and the rear end is connected to the breathing air tank 5. The nitrogen self-supporting regulating valve 4 is located on the collecting main pipe 1 to balance the pipeline pressure.

[0019] A water washing spray device 7 is provided in the breathing gas tank 5, which is mainly used to wash away the ammonia content in the exhaust gas. A separator 6 is provided on the top of the breathing gas tank 5, and a discharge pipeline I 8 is provided at the bottom of the breathing gas tank 5.

[0020] One end of the Roots blower 10 is connected to the breathing gas tank 5 through the blower input pipeline 9, and the other end is connected to the boiler incineration device 12 through the mixing and burning pipeline 11.

[0021] The boiler incineration device 12 is connected to the filter 14 through a boiler discharge pipeline 13 , and a discharge pipeline II 15 is provided at the bottom of the filter 14 .

[0022] The working process of the utility model is as follows: the collecting main pipe 1 collects various waste gases generated in the front-stage process and balances the pipeline pressure through the nitrogen self-supporting regulating valve 4. After the waste gas is sent to the breathing gas tank 5 through the pipeline, the water washing spray device 7 sprays water to absorb ammonia and carbon dioxide in the waste gas, and the separator 6 performs gas-liquid separation. The treated waste gas is sent to the boiler incineration device 12 through the Roots blower 10 for mixed combustion, and the combustible gases such as hydrogen sulfide and methane are recycled. The waste gas after incineration is further filtered and adsorbed by the filter 14, and a small amount of harmful gases that are not reused are removed and discharged through the exhaust pipe II 15.

Claims

1. A waste gas collection and treatment system at the top of an atmospheric storage tank, comprising a collection main pipe (1), a separator storage tank breathing air pipeline (2), a tar sewage tank breathing air pipeline (3), a nitrogen self-regulating valve (4), a breathing air tank (5), a separator (6), a water washing spray device (7), a discharge pipeline I (8), a blower input pipeline (9), a Roots blower (10), a blending pipeline (11), a boiler incineration device (12), a boiler discharge pipeline (13), a filter (14), and a discharge pipeline II (15), characterized in that The front end of the collecting main pipe (1) is connected to the breathing air pipeline (2) of the separator storage tank and the breathing air pipeline (3) of the tar sewage tank, and the rear end is connected to the breathing air tank (5). A water washing spray device (7) is provided in the breathing air tank (5). A separator (6) is provided on the top of the breathing air tank (5). One end of the Roots blower (10) is connected to the breathing air tank (5) through the blower input pipeline (9), and the other end is connected to the boiler incineration device (12) through the mixing and burning pipeline (11). The boiler incineration device (12) is connected to the filter (14) through the boiler discharge pipeline (13).

2. The exhaust gas collection and treatment system at the top of an atmospheric pressure storage tank according to claim 1 is characterized in that The nitrogen self-supporting regulating valve (4) is located on the collecting main pipe (1).

3. The exhaust gas collection and treatment system at the top of an atmospheric pressure storage tank according to claim 1 is characterized in that A discharge pipeline I (8) is provided at the bottom of the breathing gas tank (5).

4. The exhaust gas collection and treatment system at the top of an atmospheric pressure storage tank according to claim 1 is characterized in that A discharge pipe II (15) is provided at the bottom of the filter (14).

5. The exhaust gas collection and treatment system at the top of an atmospheric pressure storage tank according to claim 1 is characterized in that The filter (14) is an activated carbon filter.

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