VOCs tail gas treatment equipment for coal gas purification system of coking plant

Abstract

The utility model discloses VOCs (Volatile Organic Compounds) tail gas treatment equipment for a coal gas purification system of a coking plant. The VOCs tail gas treatment equipment comprises a first stirring blade and a first motor, according to the VOCs tail gas treatment equipment for the coal gas purification system of the coking plant, the bottom surface of the inner side of a tower body is fixedly connected with an aeration pipe, a first motor is fixedly mounted in a notch in the lower portion of the tower body, the output end of the first motor is fixedly connected with a first rotating shaft, and the outer wall of the first rotating shaft is fixedly connected with first stirring blades; a plurality of groups of spraying assemblies are arranged between the two corresponding gaps in the tower body, VOCs tail gas introduced into the tower body is uniformly introduced through an aeration pipe, so that the VOCs tail gas is directly washed with water and is in contact with an absorption solvent, and meanwhile, a first motor is matched to drive a first rotating shaft and stirring blades to rotate, so that the VOCs tail gas introduced into the bottom of the tower body is in full contact with the absorption solvent; the absorption solvent at the bottom of the tower body is repeatedly and fully contacted with the VOCs tail gas by carrying out absorption water washing on the VOCs tail gas, and the utilization effect of the absorption solvent is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to VOCs tail gas treatment equipment of a gas purification system of a coking plant. Background Art

[0002] VOCs waste gas is a common industrial waste gas in the chemical industry. For example, in the coking plant gas purification system, VOCs tail gas is produced during the production and storage process. Most of the components are carcinogenic pollutants. If they are discharged into the atmosphere without treatment, they will seriously endanger human health and cause great harm to the environment. The method of using solutions, solvents or clean water to absorb volatile gases in industrial waste gas and separate them from the waste gas is called absorption method. Solutions, solvents, and clean water are called absorbents. Different absorbents can absorb different harmful gases. The absorption equipment used in the absorption method is called an absorber, purifier or scrubber. The process flow of the absorption method is similar to the wet dust removal process, except that the wet dust removal process uses clean water, while the absorption method uses solvents or solutions to purify harmful gases.

[0003] In the prior art with Publication (Announcement) Number: CN215086114U, Publication (Announcement) Date: 2021-12-10, a VOCs tail gas treatment device for a coking plant gas purification system is proposed, comprising an air inlet pipe, a cold drum pretreatment tower is provided on one side of the air inlet pipe, a treatment mechanism is provided on one side of the cold drum pretreatment tower, the treatment mechanism comprises a reaction chamber, a first connecting pipe is provided on one side of the reaction chamber, one end of the first connecting pipe is connected to the cold drum pretreatment tower, the other end of the first connecting pipe passes through the reaction chamber and is fixedly connected to the reaction chamber, a second connecting pipe is provided at the bottom of the reaction chamber, a water storage tank is provided at the bottom of the second connecting pipe, the top of the second connecting pipe is connected to the bottom of the reaction chamber, and the bottom of the second connecting pipe is connected to the top of the water storage tank. The utility model achieves qualified discharge of tail gas by setting a cold drum pretreatment tower and a treatment mechanism, avoids environmental pollution, and thus ensures people's health.

[0004] In the above-mentioned prior art, absorption is used to treat waste gas, but only spraying is arranged during waste gas absorption treatment, resulting in insufficient utilization of absorption solvent, affecting the waste gas treatment effect. Therefore, a new VOCs tail gas treatment equipment of a coking plant gas purification system is proposed to optimize the above-mentioned prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a VOCs tail gas treatment device for a coking plant coal gas purification system to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A VOCs tail gas treatment device of a gas purification system in a coking plant comprises a tower body, wherein the upper and lower parts of the tower body are both provided with a notch, a support plate is fixedly connected to the inner side of the opening of the notch, and the notch is auxiliary supported by the support plate, an aeration pipe is fixedly connected to the inner bottom surface of the tower body, one end of the aeration pipe passes through the tower body and is connected to an air inlet pipe, and gas outlet nozzles are evenly provided on the aeration pipe, a first motor is fixedly installed in the lower notch of the tower body, a first rotating shaft is fixedly connected to the output end of the first motor, the first rotating shaft is inserted into the bottom of the tower body and is rotatably connected to the inner bottom surface of the tower body, a first stirring blade is fixedly connected to the outer wall of the first rotating shaft, and a plurality of spraying components are provided between two corresponding notches in the tower body.

[0008] As a further solution of the utility model: the spray assembly includes baffles, and the baffles on each spray assembly are staggered. The staggered baffles form a serpentine gas flow channel, which extends the distance the gas passes through, and multiple spraying is performed through multiple spray assemblies. The bottom surface of the baffle is fixedly connected to a liquid outlet box, and the bottom surface of the liquid outlet box is evenly provided with leakage holes. The liquid outlet box is fixedly connected to a connecting pipe, and the connecting pipe is fixedly connected to an infusion tube after passing through the tower body. One end of the infusion tube is fixedly connected to and communicated with the inner side of the bottom of the tower body. A pump body is fixedly installed on the infusion tube, and the pump body is fixedly installed on the outer wall of the tower body.

[0009] As a further solution of the utility model: a bracket is fixedly connected above the inner side of the tower body corresponding to the top notch, a plurality of orifice plates are fixedly connected at equal distances below the tower body corresponding to the bracket, a second motor is fixedly installed in the upper notch, an output end of the second motor is inserted into the tower body and fixedly connected to a second rotating shaft, the second rotating shaft rotates through the orifice plate and is rotatably connected to the bottom surface of the bracket, and second stirring blades are symmetrically fixedly connected to both sides of the orifice plate corresponding to the second rotating shaft.

[0010] As a further solution of the utility model: a demister matched with the tower body is provided above the bracket, the demister is a tube bundle type demister, a pressure ring is placed on the top surface of the demister, a tower cover is provided above the pressure ring, corresponding openings of the tower cover, the pressure ring and the tower body are provided with connecting flanges, the connecting flanges are stacked on each other and fixed by bolts, through holes for bolt fixing are opened on the connecting flanges, and an air outlet is provided on the top surface of the tower cover.

[0011] As a further solution of the utility model: a partition net is fixedly embedded in the bottom surface of the pressure ring, an activated carbon filter net matching with the pressure ring is arranged on the inner side of the pressure ring, and a resist ring is fixedly connected to the inner side of the bottom of the tower cover, and the resist ring is pressed on the top surface of the activated carbon filter net.

[0012] As a further solution of the utility model: an absorption solvent is provided on the inner side of the bottom of the tower body, an injection pipe is fixedly connected to the side wall of the tower body corresponding to the lower notch, a sealing cover is fixedly installed on the injection pipe by bolts, and a drain valve is installed on the bottom side wall of the tower body.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model introduces the VOCs tail gas introduced into the tower body evenly through the aeration pipe, so that the VOCs tail gas is directly washed with water and contacts with the absorption solvent, and at the same time cooperates with the first motor to drive the first rotating shaft and the stirring blade to rotate, so that the VOCs tail gas introduced into the bottom of the tower body is fully contacted with the absorption solvent and washed with absorption, and then cooperates with the multiple groups of spraying components for spraying, so that the absorption solvent at the bottom of the tower body is repeatedly and fully contacted with the VOCs tail gas, which effectively improves the utilization effect of the absorption solvent and improves the VOCs tail gas treatment effect.

[0015] 2. The utility model uses a multi-layer spraying assembly to perform multiple spraying in the serpentine gas flow channel formed by the baffle, thereby further improving the absorption and purification effect of VOCs tail gas.

[0016] 3. The utility model can condense the water mist carried in the rising treated VOCs exhaust gas through the demister, reduce the water vapor content in the treated VOCs exhaust gas, so that it can easily come into contact with the activated carbon filter, further treat the treated VOCs exhaust gas, and further improve the treatment effect of the VOCs exhaust gas.

[0017] 4. The utility model disperses the upward-flowing treated VOCs exhaust gas by setting a perforated plate, and cooperates with the second motor to drive the second rotating shaft and the second stirring blade to rotate to further disperse the flowing air, so that the treated VOCs exhaust gas entering the demister and the activated carbon filter is evenly distributed, which facilitates uniform contact with the demister and the activated carbon filter.

[0018] 5. The demister of the utility model is placed on a bracket, the pressure ring and the tower cover are stacked on each other, the activated carbon filter is confined in the pressure ring by the cam and the stopper, and the flange is fastened by bolts to form an assembled installation, so that disassembly and maintenance can be easily achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of VOCs tail gas treatment equipment in a coking plant gas purification system.

[0020] Figure 2 This is a front view of a VOCs tail gas treatment device in a coking plant gas purification system.

[0021] Figure 3 This is a diagram showing the aeration pipe in the VOCs tail gas treatment equipment of a coking plant gas purification system.

[0022] Figure 4This is a display diagram of the bracket of the VOCs tail gas treatment equipment in the gas purification system of a coking plant.

[0023] In the figure: 1. tower body; 2. notch; 3. support plate; 4. aeration pipe; 5. nozzle; 6. first motor; 7. first rotating shaft; 8. first stirring blade; 9. spray assembly; 10. baffle; 11. liquid outlet box; 12. water leakage hole; 13. connecting pipe; 14. infusion pipe; 15. pump body; 16. bracket; 17. orifice plate; 18. second motor; 19. second rotating shaft; 20. second stirring blade; 21. demister; 22. pressure ring; 23. tower cover; 24. connecting flange; 25. partition net; 26. activated carbon filter; 27. retaining ring; 28. switch. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figures 1 to 4 In an embodiment of the utility model, a VOCs tail gas treatment device of a gas purification system of a coking plant includes a tower body 1, a notch 2 is provided at the upper and lower parts of the tower body 1, a support plate 3 is fixedly connected to the inner side of the opening of the notch 2, and the notch 2 is auxiliary supported by the support plate 3, an aeration pipe 4 is fixedly connected to the inner bottom surface of the tower body 1, one end of the aeration pipe 4 passes through the tower body 1 and is connected to the air inlet pipe, and gas outlet nozzles 5 are evenly provided on the aeration pipe 4, a first motor 6 is fixedly installed in the notch 2 below the tower body 1, and a first rotating shaft 7 is fixedly connected to the output end of the first motor 6, the first rotating shaft 7 is inserted into the bottom of the tower body 1 and is rotatably connected to the inner bottom surface of the tower body 1, a first stirring blade 8 is fixedly connected to the outer wall of the first rotating shaft 7, and a plurality of spray components 9 are provided between the two corresponding notches 2 in the tower body 1.

[0026] The VOCs tail gas introduced into the tower body 1 is uniformly introduced through the aeration pipe 4, so that the VOCs tail gas is directly washed with water and contacts with the absorption solvent. At the same time, the first motor 6 drives the first rotating shaft 7 and the stirring blade 8 to rotate, so that the VOCs tail gas introduced into the bottom of the tower body 1 is fully contacted with the absorption solvent and washed with absorption. Then, the multiple groups of spraying components 9 are sprayed, so that the absorption solvent at the bottom of the tower body 1 is repeatedly and fully contacted with the VOCs tail gas, which effectively improves the utilization effect of the absorption solvent and improves the VOCs tail gas treatment effect.

[0027] The spray assembly 9 includes a baffle 10, and the baffles 10 on each spray assembly 9 are arranged in a staggered manner. The staggered arrangement of the baffles 10 forms a serpentine gas flow channel, which extends the distance that the gas passes through, and multiple spray assemblies 9 are used for multiple spraying. The bottom surface of the baffle 10 is fixedly connected to a liquid outlet box 11, and the bottom surface of the liquid outlet box 11 is evenly provided with leakage holes 12. The liquid outlet box 11 is fixedly connected to a connecting pipe 13, and the connecting pipe 13 is fixedly connected to a liquid infusion pipe 14 after passing through the tower body 1. One end of the liquid infusion pipe 14 is fixedly connected and communicated with the inner side of the bottom of the tower body 1, and a pump body 15 is fixedly installed on the liquid infusion pipe 14, and the pump body 15 is fixedly installed on the outer wall of the tower body 1.

[0028] Multiple spraying is performed in the serpentine gas flow channel formed by the baffle 10 through the multi-layer spray assembly 9, thereby further improving the absorption and purification effect of VOCs tail gas.

[0029] A bracket 16 is fixedly connected to the top of the inner side of the tower body 1 corresponding to the top notch 2, and a plurality of orifice plates 17 are fixedly connected to the bottom of the tower body 1 corresponding to the bracket 16 at equal distances. A second motor 18 is fixedly installed in the upper notch 2, and the output end of the second motor 18 is inserted into the tower body 1 and fixedly connected to a second rotating shaft 19. The second rotating shaft 19 rotates through the orifice plate 17 and is rotatably connected to the bottom surface of the bracket 16. Second stirring blades 20 are symmetrically fixedly connected to both sides of the orifice plate 17 corresponding to the second rotating shaft 19.

[0030] A demister 21 adapted to the tower body 1 is provided above the bracket 16. The demister 21 is a tube bundle type demister. A pressure ring 22 is placed on the top surface of the demister 21. A tower cover 23 is provided above the pressure ring 22. The tower cover 23, the pressure ring 22 and the corresponding openings of the tower body 1 are all provided with connecting flanges 24. The connecting flanges 24 are stacked on each other and fixed by bolts. The connecting flanges 24 are all provided with through holes for bolt fixing. An air outlet is provided on the top surface of the tower cover 23.

[0031] A partition net 25 is fixedly embedded on the bottom surface of the pressure ring 22 , and an activated carbon filter net 26 matching with it is arranged on the inner side of the pressure ring 22 . A retaining ring 27 is fixedly connected to the inner side of the bottom of the tower cover 23 , and the retaining ring 27 presses on the top surface of the activated carbon filter net 26 .

[0032] An absorption solvent is arranged on the inner side of the bottom of the tower body 1 , an injection pipe is fixedly connected to the side wall of the tower body 1 corresponding to the lower notch 2 , a sealing cover is fixedly installed on the injection pipe by bolts, and a drain valve is installed on the bottom side wall of the tower body 1 .

[0033] A switch 28 is fixedly installed inside the bottom notch 2. The first motor 6, the pump body 15 and the second motor 18 are all electrically connected to the switch 28 through wires. The switch 28 is externally connected to a power source.

[0034] The mist carried in the rising treated VOCs exhaust gas can be condensed by the demister 21, reducing the water vapor content in the treated VOCs exhaust gas, so that it can easily come into contact with the activated carbon filter 26, further treat the treated VOCs exhaust gas, and further improve the treatment effect of the VOCs exhaust gas.

[0035] The orifice plate 17 is provided to disperse the upward-flowing treated VOCs exhaust gas, and the second motor 18 drives the second rotating shaft 19 and the second stirring blade 20 to rotate to further disperse the flowing air, so that the treated VOCs exhaust gas entering the demister 21 and the activated carbon filter 26 is evenly distributed, so as to facilitate uniform contact with the demister 21 and the activated carbon filter 26.

[0036] The demister 21 is placed on the bracket 16, the pressure ring 22 and the tower cover 23 are stacked on each other, the activated carbon filter 26 is confined in the pressure ring 22 by the Geang 25 and the return 27, and the flange 24 is fastened by bolts to form an assembled installation, which can be easily disassembled and maintained.

[0037] The working principle of the utility model is:

[0038] When in use, add absorption solvent through the injection pipe, and seal the injection pipe through the cover. Stack the demister 21, the pressure ring 22 and the tower cover 23 in sequence, put the activated carbon filter 26 in when stacking, and then install and fix it through the connecting flange 24. At this time, start the first motor 6, the pump body 15 and the second motor 18 through the switch 28. The first motor 6 drives the first stirring blade 8 to rotate through the first rotating shaft 7, and the second motor 18 drives the second stirring blade 20 to rotate through the second rotating shaft 19. The pump body 15 extracts the absorption solvent from the bottom of the tower body 1 through the infusion pipe 14, and at the same time transports it to the liquid outlet box 11 through the connecting pipe 13, and finally drips downward through the leakage hole 12.

[0039] The VOCs tail gas is introduced through the aeration pipe 4, and the gas enters the absorption solvent at the bottom of the tower body 1 through the nozzle 5, and is stirred by the rotating first stirring blade 8 to fully contact with the absorption solvent to form a water washing effect. After water washing, the VOCs tail gas passes through the serpentine gas flow channel and passes through the spray assembly 9 in turn. The VOCs tail gas is further sprayed and washed by the water dripping through the leakage hole 12 for multiple times, and the washing solvent flows back to the bottom of the tower body 1 again, wherein the treated VOCs tail gas continues to rise and passes through the orifice plate 17 for dispersion, and is at the same time broken up by the rotating second stirring blade 20, and the broken up VOCs tail gas enters the demister 21 for defogger, and the defogged VOCs tail gas rises into the activated carbon filter 26 for re-absorption and purification, and is finally discharged, completing the purification treatment of the VOCs tail gas.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A VOCs tail gas treatment device for a coking plant gas purification system, comprising a tower body (1), characterized in that: The tower body (1) is provided with a notch (2) at the top and bottom, a support plate (3) is fixedly connected to the inner side of the opening of the notch (2), an aeration pipe (4) is fixedly connected to the inner bottom surface of the tower body (1), one end of the aeration pipe (4) passes through the tower body (1) and is connected to the air inlet pipe, and air outlet nozzles (5) are evenly provided on the aeration pipe (4). A first motor (6) is fixedly installed in the notch (2) below the tower body (1), a first rotating shaft (7) is fixedly connected to the output end of the first motor (6), the first rotating shaft (7) is inserted into the bottom of the tower body (1) and is rotatably connected to the inner bottom surface of the tower body (1), a first stirring blade (8) is fixedly connected to the outer wall of the first rotating shaft (7), and a plurality of spraying components (9) are provided between the two corresponding notches (2) in the tower body (1).

2. A VOCs tail gas treatment equipment for a coking plant gas purification system according to claim 1, characterized in that: The spray assembly (9) comprises baffles (10), the baffles (10) on each spray assembly (9) are arranged in a staggered manner, the bottom surface of the baffles (10) is fixedly connected to a liquid outlet box (11), the bottom surface of the liquid outlet box (11) is evenly provided with water leakage holes (12), the liquid outlet box (11) is fixedly connected to a connecting pipe (13), the connecting pipe (13) passes through the tower body (1) and is fixedly connected to a liquid infusion pipe (14), one end of the liquid infusion pipe (14) is fixedly connected to and communicates with the inner side of the bottom of the tower body (1), and a pump body (15) is fixedly installed on the liquid infusion pipe (14).

3. The VOCs tail gas treatment equipment of a coking plant gas purification system according to claim 1 is characterized by: A bracket (16) is fixedly connected to the upper side of the inner side of the tower body (1) corresponding to the top notch (2); a plurality of orifice plates (17) are fixedly connected to the lower side of the tower body (1) corresponding to the bracket (16) at equal distances; a second motor (18) is fixedly installed in the upper notch (2); an output end of the second motor (18) is inserted into the tower body (1) and fixedly connected to a second rotating shaft (19); the second rotating shaft (19) rotatably passes through the orifice plate (17) and is rotatably connected to the bottom surface of the bracket (16); and second stirring blades (20) are symmetrically fixedly connected to both sides of the second rotating shaft (19) corresponding to the orifice plate (17).

4. A VOCs tail gas treatment equipment for a coking plant gas purification system according to claim 3, characterized in that: A demister (21) adapted to the tower body (1) is arranged above the bracket (16); a pressure ring (22) is placed on the top surface of the demister (21); a tower cover (23) is arranged above the pressure ring (22); corresponding openings of the tower cover (23), the pressure ring (22) and the tower body (1) are all provided with connecting flanges (24); the connecting flanges (24) are stacked on each other and fixedly installed by bolts; and an air outlet is arranged on the top surface of the tower cover (23).

5. A VOCs tail gas treatment equipment for a coking plant gas purification system according to claim 4, characterized in that: A partition net (25) is fixedly embedded on the bottom surface of the pressure ring (22), an activated carbon filter net (26) matching the pressure ring (22) is provided on the inner side of the pressure ring (22), and a retaining ring (27) is fixedly connected to the inner side of the bottom of the tower cover (23), and the retaining ring (27) is pressed on the top surface of the activated carbon filter net (26).

6. The VOCs tail gas treatment equipment of a coking plant gas purification system according to claim 1, characterized in that: An absorption solvent is provided on the inner side of the bottom of the tower body (1), an injection pipe is fixedly connected to the side wall of the tower body (1) corresponding to the lower notch (2), a sealing cover is fixedly installed on the injection pipe by bolts, and a sewage valve is installed on the bottom side wall of the tower body (1).

Images