Flare gas collecting and recycling treatment system

Abstract

The utility model discloses a flare gas collecting and recycling treatment system which comprises a water-sealed tank, a desulfurizing tower connected with the water-sealed tank, a flare gas treatment mechanism connected with the desulfurizing tower, a gas holder connected with the flare gas treatment mechanism and a direct-fired waste gas incinerator connected with the gas holder. An exhaust pipe is connected to the middle of the top wall of the tank body, one end of the exhaust pipe penetrates through the top wall of the tank body and extends into the tank body, a pipe body inner cavity is formed in the exhaust pipe, and a through groove is formed in the end wall of the end, extending into the tank body, of the exhaust pipe. One end of the central distributor penetrates through the pipe wall of the exhaust pipe and extends into the inner cavity of the pipe body, a plurality of spraying heads are mounted on the side wall, extending into the inner cavity of the pipe body, of the central distributor, spraying openings of the spraying heads are aligned to the through grooves, and the flare gas treatment assembly comprises a rotor rotatably arranged in the tank body and a filler layer filled in the rotor.

Description

Technical Field

[0001] The utility model relates to the technical field of flare gas treatment, in particular to a flare gas collection, recovery and treatment system. Background Art

[0002] Organic chemical products are heated and pressurized during production, inevitably generating flare gas. Flare gas is a waste gas generated during the organic chemical industry's processes. Its composition is complex, primarily containing carbon atoms, hydrogen, and hydrocarbons, as well as impurities such as sulfur oxides. It is flammable, explosive, toxic, and hazardous. Because its recovery and reuse process is complex and it cannot be directly discharged, the current industry practice is to desulfurize the flare gas and then transfer it to a flare system for full combustion before discharge. However, when burning flare gas containing large amounts of organic gases, the flare in the flare system will experience incomplete combustion, and the continuous burning of the flare will consume natural gas. This not only wastes a large amount of chemical raw materials and energy, but also emits a large amount of greenhouse gases. Utility Model Content

[0003] In view of this, the utility model provides a flare gas collection, recovery and processing system to solve the above-mentioned problems.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A flare gas collection, recovery and treatment system, comprising a water seal tank, a desulfurization tower connected to the water seal tank via a pipeline, a flare gas treatment mechanism connected to the desulfurization tower via a pipeline, a gas holder connected to the flare gas treatment mechanism via a pipeline, and a direct-fired waste gas incinerator connected to the gas holder via a pipeline, the flare gas treatment mechanism comprising a tank body, a central distributor arranged on the tank body, and a flare gas treatment assembly installed in the tank body, an exhaust pipe is connected to the middle of the top wall of the tank body, one end of the exhaust pipe passes through the top wall of the tank body and extends to the interior of the tank body A tube cavity is provided inside the exhaust pipe, and a through groove is provided on the end wall of the exhaust pipe extending to one end of the interior of the tank body. The tube cavity is connected with the interior of the tank body through the through groove. One end of the central distributor extends through the pipe wall of the exhaust pipe into the tube cavity. A plurality of spray heads are evenly and symmetrically installed on the side wall of the central distributor extending into the tube cavity. The spray ports of the plurality of spray heads are all aligned with the through groove. The flare gas processing assembly includes a rotor rotatably arranged in the tank body and a filler layer filled in the rotor.

[0006] Furthermore, the tank body is a cylindrical structure, an air inlet is provided on the top of the side wall of the tank body, a liquid outlet is provided on the side of the bottom wall of the tank body close to the air inlet, and the air inlet and the liquid outlet are both connected to the interior of the tank body.

[0007] Furthermore, a mounting frame is provided in the middle of the bottom of the tank body, and support frames are symmetrically provided on both sides of the mounting frame. The mounting frame and the support frames are both fixedly connected to the tank body or formed integrally therewith.

[0008] Furthermore, the flare gas processing assembly also includes a rotating shaft fixedly connected to the rotor, and a drive motor connected to the rotating shaft, the drive motor is installed on the mounting bracket, one end of the rotating shaft extends through the bottom wall of the tank body to the outside of the tank body and is fixedly connected to the output shaft of the drive motor.

[0009] Furthermore, a plurality of through holes are evenly formed on the surface of the rotor.

[0010] Furthermore, the tank body is in a cylindrical structure, the exhaust pipe is in an L-shaped structure, the central distributor is in a tubular structure, and the central axis of the central distributor is arranged to coincide with the central axis of the tank body.

[0011] Furthermore, the gas cabinet includes a cabinet body, a top cover with a sealing cover arranged on the top of the cabinet body, and a piston movably arranged in the cabinet body.

[0012] Furthermore, a gas inlet and a gas outlet are symmetrically provided on the bottom of the side wall of the cabinet, and guide grooves are symmetrically provided on the inner side wall of the cabinet, and both ends of the piston are slidably arranged in the guide grooves.

[0013] Furthermore, a pressure sensor is installed in the middle of the inner bottom wall of the cabinet, a rangefinder is installed in the middle of the inner wall of the top cover, the gas outlet of the cabinet is connected to a gas pipe, a suction pump is installed on the gas pipe, and one end of the gas pipe is connected to the inlet of the direct-fired waste gas incinerator.

[0014] The beneficial effects of the utility model are:

[0015] The flare gas collection, recovery and treatment system provided by the utility model includes a water seal tank for accommodating the flare gas and preventing backfire, a desulfurization tower connected to the water seal tank through a pipeline for desulfurizing the flare gas, a flare gas treatment mechanism connected to the desulfurization tower through a pipeline for absorbing most of the organic matter in the flare gas, a gas cabinet connected to the flare gas treatment mechanism through a pipeline for storing the treated flare gas, and a direct-fired waste gas incinerator connected to the gas cabinet through a pipeline for fully burning the treated flare gas. The flare gas treatment mechanism includes a tank body for accommodating the flare gas, a central distributor arranged on the tank body for conveying an absorption solvent, and a flare gas treatment component installed in the tank body for absorbing the flare gas, an exhaust pipe for discharging the absorbed flare gas is connected in the middle of the top wall of the tank body, one end of the exhaust pipe passes through the top wall of the tank body and extends to the interior of the tank body, a pipe body cavity for conveying the flare gas is provided in the interior of the exhaust pipe, a through groove is provided on the end wall of the exhaust pipe extending to one end of the interior of the tank body, the pipe body cavity is connected to the interior of the tank body through the through groove, and the central distributor is provided. One end of the distributor extends through the wall of the exhaust pipe into the inner cavity of the pipe body. A plurality of spray heads for spraying solvents are evenly and symmetrically installed on the side wall of the central distributor extending into the inner cavity of the pipe body. The spray ports of the plurality of spray heads are all aligned with the through grooves on the end wall of the exhaust pipe. The flare gas treatment assembly includes a rotor rotatably arranged in the tank body, and a packing layer filled in the rotor for adsorbing the flare gas. After the flare gas enters the tank body, the solvent is transported to the central distributor. The solvent is sprayed out through the spray head and sprayed through the through groove onto the packing layer in the rotor. The rotor drives the packing layer to rotate, so that the solvent sprayed on the packing layer flows rapidly in the packing layer along the rotation direction of the rotor. At the same time, the flare gas passes through the through holes on the surface of the rotor into the interior of the rotor and forms convection when flowing, thereby ensuring that the flare gas is fully in contact with the packing layer and the solvent, so that the solvent fully absorbs the organic matter in the flare gas. At the same time, the packing layer adsorbs the organic matter that is not dissolved in the solvent, thereby improving the recovery rate of the organic matter in the flare gas and avoiding the use of a long-burning lamp to fully burn the flare gas, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 This is a front view of the flare gas collection, recovery and processing system of the present invention;

[0018] Figure 2 for Figure 1 A cross-sectional view of a flare gas processing mechanism in a flare gas collection, recovery, and processing system according to the present invention is shown;

[0019] Figure 3 for Figure 1The figure shows a cross-sectional view of a gas cabinet in the flare gas collection, recovery and processing system of the present invention.

[0020] In the figure: 100, flare gas collection, recovery and treatment system, 1, water seal tank, 2, desulfurization tower, 3, flare gas treatment mechanism, 31, tank body, 311, air inlet, 312, liquid outlet, 313, exhaust pipe, 3131, tube body inner cavity, 3132, through groove, 314, mounting frame, 315, support frame, 32, central distributor, 321, sprinkler head, 33, flare gas treatment assembly, 331, rotor, 332, packing layer, 333, rotating shaft, 334, drive motor, 4, gas cabinet, 41, cabinet body, 411, gas inlet, 412, gas outlet, 413, guide groove, 414, pressure sensor, 42, top cover, 421, rangefinder, 43, piston, 44, gas pipe, 441, suction pump, 5, direct-fired waste gas incinerator. DETAILED DESCRIPTION

[0021] The present invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0022] like Figure 1 As shown, the utility model provides a flare gas collection, recovery and treatment system 100 for treating the flare gas generated in the production process of organic chemical products. The flare gas collection, recovery and treatment system 100 of the utility model includes a water seal tank 1 for accommodating the flare gas and preventing backfire, a desulfurization tower 2 connected to the water seal tank 1 through a pipeline for desulfurizing the flare gas, a flare gas treatment mechanism 3 connected to the desulfurization tower 2 through a pipeline for absorbing most of the organic matter in the flare gas, a gas cabinet 4 connected to the flare gas treatment mechanism 3 through a pipeline for storing the treated flare gas, and a direct-fired waste gas incinerator 5 connected to the gas cabinet 4 through a pipeline for fully burning the treated flare gas. The flare gas source is transported to the water seal tank 1 through a pipeline, and is successively desulfurized by the desulfurization tower 2 and absorbed by the flare gas treatment mechanism 3 before entering the gas cabinet 4 for storage. Finally, it is transported to the direct-fired waste gas incinerator 5 under a certain pressure for full combustion and then discharged.

[0023] like Figure 1 and Figure 2As shown, the flare gas processing mechanism 3 includes a tank body 31 for containing flare gas, a central distributor 32 arranged on the tank body 31 for conveying an absorption solvent, and a flare gas processing assembly 33 installed in the tank body 31 for absorbing and treating the flare gas; the tank body 31 is roughly cylindrical in structure, and an air inlet 311 for conveying flare gas is provided on the top of the side wall of the tank body 31, and a liquid outlet 312 for discharging the solution is provided on the side of the bottom wall of the tank body 31 near the air inlet 311. The air inlet 311 and the liquid outlet 312 are both connected to the interior of the tank body 31, and an exhaust pipe 313 for discharging the flare gas after absorption and treatment is connected in the middle of the top wall of the tank body 31. The exhaust pipe 313 is roughly L-shaped, one end of the exhaust pipe 313 passes through the top wall of the tank body 31 and extends to the interior of the tank body 31. The interior of the exhaust pipe 313 is provided with a tube cavity 3131 for conveying the flare gas, and the exhaust pipe 313 extends to the end wall of one end of the tank body 31 and is provided with a through groove 3132. The tube cavity 3131 is connected to the interior of the tank body 31 through the through groove 3132; a mounting bracket 314 that matches the flare gas processing assembly 33 is provided in the middle of the bottom of the tank body 31, and support brackets 315 for supporting the tank body 31 are symmetrically provided on both sides of the mounting bracket 314, and the mounting bracket 314 and the support bracket 315 are both fixedly connected to the tank body 31 The central distributor 32 is generally tubular in structure, one end of the central distributor 32 passes through the wall of the exhaust pipe 313 and extends into the inner cavity 3131 of the tube body, and the central axis of the central distributor 32 coincides with the central axis of the tank body 31. A plurality of spray heads 321 for spraying solvent are evenly and symmetrically installed on the side wall of the central distributor 32 extending into the inner cavity 3131 of the tube body, and the spray ports of the plurality of spray heads 321 are all aligned with the through groove 3132 on the end wall of the exhaust pipe 313. After the solvent enters the central distributor 32, it is sprayed out through the spray head 321 and passes through the through groove 3132 to enter the tank body 31 and contact the flare gas treatment component; the flare gas treatment component The treatment assembly 33 includes a rotor 331 rotatably arranged in the tank body 31, a packing layer 332 filled in the rotor 331 for adsorbing the flare gas, a rotating shaft 333 fixedly connected to the rotor 331 for driving the rotor 331 to rotate, and a driving motor 334 connected to the rotating shaft 333 for driving the rotating shaft 333. A plurality of through holes (not shown) for passing the flare gas and solution are evenly opened on the surface of the rotor 331. The driving motor 334 is mounted on the mounting bracket 314 at the bottom of the tank body 31. One end of the rotating shaft 333 extends through the bottom wall of the tank body 31 to the outside of the tank body 31 and is fixedly connected to the output shaft of the driving motor 334.After the flare gas enters the tank body 31, the solvent is transported to the central distributor 32 and the drive motor 334 is started. The solvent is sprayed out through the spray head 321 and passes through the through groove 3132 to be sprayed onto the packing layer 332 in the rotor 331. When the output shaft of the drive motor 334 drives the rotating shaft 333 to drive the rotor 331 to rotate, the packing layer inside the rotor 331 rotates with the rotor 331, so that the solvent sprayed on the packing layer 332 flows rapidly in the packing layer 332 along the rotation direction of the rotor 331. At the same time, the flare gas passes through the through holes on the surface of the rotor 331 and enters the interior of the rotor 331. The solvent forms convection when flowing, thereby ensuring that the flare gas is fully in contact with the packing layer 332 and the solvent, so that the solvent fully absorbs the organic matter in the flare gas. At the same time, the packing layer 332 adsorbs the organic matter that is not dissolved in the solvent, thereby improving the recovery rate of the organic matter in the flare gas. The solution formed by absorbing the organic matter is discharged and collected through the liquid outlet 312, and the treated flare gas is transported to the gas cabinet 4 for storage through the exhaust pipe 313. ;

[0024] like Figure 1 and Figure 3 As shown, the gas cabinet 4 includes a cabinet body 41 for accommodating flare gas, a top cover 42 with a sealing cover arranged on the top of the cabinet body 41, and a piston 43 movably arranged in the cabinet body 41. A gas inlet 411 for collecting flare gas and a gas outlet 412 for discharging flare gas are symmetrically provided at the bottom of the side wall of the cabinet body 41. Guide grooves 413 cooperating with the piston 43 are symmetrically provided on the inner side wall of the cabinet body 41. Both ends of the piston 43 are slidably arranged in the guide grooves 413. The piston 43 can slide back and forth along the length direction of the guide grooves 413. A pressure sensor 414 for measuring the gas pressure inside the gas cabinet 4 is installed in the middle of the inner bottom wall of the cabinet body 41. A distance meter 421 for measuring the sliding distance of the piston 43 is installed in the middle of the inner wall of the top cover 42. A gas pipe 44 for conveying flare gas is connected to the gas outlet 412 of the cabinet body 41. A suction pump 441 is installed for sucking the flare gas in the gas cabinet 4, and one end of the gas pipe 44 is connected to the inlet of the direct-fired waste gas incinerator 5; the flare gas treated by the flare gas treatment mechanism 3 is transported to the cabinet 41 through the exhaust pipe 313 and the gas inlet 411. The flare gas entering the cabinet 41 diffuses and pushes the piston 43 to slide upward. After the piston 43 slides to the top, the sliding distance of the piston 43 is observed by the rangefinder 421 to ensure that the piston 43 has not disengaged from the guide groove 413. At the same time, the pressure sensor 414 is used to detect the enterprise in the gas cabinet 4 and continue to transport the flare gas until the air pressure reaches the set value. The suction pump 441 is started, and the suction pump 441 sucks the flare gas in the gas cabinet 4 and then transports it to the direct-fired waste gas incinerator 5 through the gas pipe 44 for full combustion and post-emission treatment. The piston 43 slides downward to the bottom under the action of the suction pump 441.

[0025] When treating the flare gas, the flare gas source is transported to the water seal tank 1 through a pipeline, the flare gas in the water seal tank 1 enters the desulfurization tower 2 for desulfurization treatment, and the flare gas after desulfurization treatment is transported to the flare gas treatment mechanism 3, the solvent is transported to the central distributor 32 and the drive motor 334 is started, the solvent is sprayed out through the spray head 321 and passes through the through groove 3132 to be sprayed onto the packing layer 332 in the rotor 331, and when the output shaft of the drive motor 334 drives the rotating shaft 333 to drive the rotor 331 to rotate, the packing layer inside the rotor 331 rotates with the rotor 331, so that the solvent sprayed on the packing layer 332 flows rapidly in the packing layer 332 along the rotation direction of the rotor 331, and at the same time, the flare gas passes through the through hole on the surface of the rotor 331 into the interior of the rotor 331 and the solvent forms convection when flowing, thereby ensuring that the flare gas and the packing layer 332 are in a continuous state. The flare gas is fully contacted with the solvent so that the solvent can fully absorb the organic matter in the flare gas. At the same time, the packing layer 332 adsorbs the organic matter that is not dissolved in the solvent. The solution formed by the absorbed organic matter is discharged and collected through the liquid outlet 312. The flare gas treated by the flare gas treatment mechanism 3 is transported to the cabinet 41 through the exhaust pipe 313 and the gas inlet 411. The flare gas entering the cabinet 41 diffuses and pushes the piston 43 to slide upward. After the piston 43 slides to the top, the sliding distance of the piston 43 is observed by the rangefinder 421 to ensure that the piston 43 is not separated from the guide groove 413. At the same time, the enterprise in the gas cabinet 4 is detected by the pressure sensor 414 and the flare gas is continued to be transported until the air pressure reaches the set value. The suction pump 441 is started. The suction pump 441 sucks the flare gas in the gas cabinet 4 and transports it to the direct-fired waste gas incinerator 5 through the gas pipe 44 for full combustion and then emission treatment.

[0026] The flare gas collection, recovery and treatment system 100 provided by the present invention is used for accommodating flare gas and preventing backfire with a water seal tank 1, a desulfurization tower 2 for desulfurizing the flare gas connected to the water seal tank 1 through a pipeline, a flare gas treatment mechanism 3 for absorbing most of the organic matter in the flare gas connected to the desulfurization tower 2 through a pipeline, a gas cabinet 4 for storing the treated flare gas connected to the flare gas treatment mechanism 3 through a pipeline, and a direct-fired waste gas incinerator 5 for fully burning the treated flare gas connected to the gas cabinet 4 through a pipeline. The flare gas treatment mechanism 3 includes a tank body 31 for accommodating flare gas, which is arranged on the tank body 31 for A central distributor 32 for conveying absorption solvent and a flare gas treatment assembly 33 installed in the tank body 31 for absorbing the flare gas are provided. An exhaust pipe 313 for discharging the flare gas after absorption treatment is connected to the middle of the top wall of the tank body 31. One end of the exhaust pipe 313 passes through the top wall of the tank body 31 and extends to the interior of the tank body 31. An inner cavity 3131 of the pipe for conveying flare gas is provided in the exhaust pipe 313. A through groove 3132 is provided on the end wall of the exhaust pipe 313 extending to one end of the interior of the tank body 31. The inner cavity 3131 of the pipe is connected to the interior of the tank body 31 through the through groove 3132. One end of the central distributor 32 passes through the exhaust pipe 313. The pipe wall of 13 extends into the inner cavity 3131 of the pipe body, and a plurality of spray heads 321 for spraying solvent are evenly and symmetrically installed on the side wall of the central distributor 32 extending into the inner cavity 3131 of the pipe body. The spray ports of the plurality of spray heads 321 are all aligned with the through groove 3132 on the end wall of the exhaust pipe 313. The flare gas processing assembly 33 includes a rotor 331 rotatably arranged in the tank body 31, and a filler layer 332 filled in the rotor 331 for adsorbing the flare gas. After the flare gas enters the tank body 31, the solvent is transported to the central distributor 32, and the solvent is sprayed out through the spray head 321 and sprayed onto the rotor 331 through the through groove 3132. On the packing layer 332 inside, the rotor 331 drives the packing layer 332 to rotate, so that the solvent sprayed on the packing layer 332 flows rapidly in the packing layer 332 along the rotation direction of the rotor 331, and at the same time, the torch gas passes through the through holes on the surface of the rotor 331 into the interior of the rotor 331 and the solvent forms convection when flowing, thereby ensuring that the torch gas is in full contact with the packing layer 332 and the solvent, so that the solvent fully absorbs the organic matter in the torch gas, and at the same time, the packing layer 332 adsorbs the undissolved organic matter in the solvent, thereby improving the recovery rate of the organic matter in the torch gas, and avoiding the use of a long-burning lamp to fully burn the torch gas, thereby reducing energy consumption.

[0027] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the scope of the present invention. The technical scope of this utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A flare gas collection, recovery and processing system, characterized in that: It includes a water seal tank, a desulfurization tower connected to the water seal tank through a pipeline, a flare gas treatment mechanism connected to the desulfurization tower through a pipeline, a gas holder connected to the flare gas treatment mechanism through a pipeline, and a direct-fired waste gas incinerator connected to the gas holder through a pipeline. The flare gas treatment mechanism includes a tank body, a central distributor arranged on the tank body, and a flare gas treatment component installed in the tank body. An exhaust pipe is connected to the middle of the top wall of the tank body. One end of the exhaust pipe passes through the top wall of the tank body and extends to the interior of the tank body. The interior of the exhaust pipe A tube cavity is opened at the part, and a through groove is opened on the end wall of the exhaust pipe extending to one end of the interior of the tank body. The tube cavity is connected with the interior of the tank body through the through groove. One end of the central distributor passes through the pipe wall of the exhaust pipe and extends into the tube cavity. A plurality of spray heads are evenly and symmetrically installed on the side wall of the central distributor extending into the tube cavity. The spray ports of the plurality of spray heads are all aligned with the through groove. The flare gas processing assembly includes a rotor rotatably arranged in the tank body and a filler layer filled in the rotor.

2. The flare gas collection, recovery and treatment system according to claim 1, characterized in that: The tank body is cylindrical in structure, an air inlet is provided on the top of the side wall of the tank body, a liquid outlet is provided on the side of the bottom wall of the tank body close to the air inlet, and both the air inlet and the liquid outlet are connected to the interior of the tank body.

3. The flare gas collection, recovery and treatment system according to claim 1, characterized in that: A mounting frame is provided in the middle of the bottom of the tank body, and support frames are symmetrically provided on both sides of the mounting frame. The mounting frame and the support frames are both fixedly connected to the tank body or formed integrally.

4. The flare gas collection, recovery and treatment system according to claim 3, characterized in that: The flare gas processing assembly also includes a rotating shaft fixedly connected to the rotor, and a drive motor connected to the rotating shaft. The drive motor is installed on the mounting bracket. One end of the rotating shaft extends through the bottom wall of the tank body to the outside of the tank body and is fixedly connected to the output shaft of the drive motor.

5. The flare gas collection, recovery and treatment system according to claim 1, characterized in that: A plurality of through holes are evenly arranged on the surface of the rotor.

6. The flare gas collection, recovery and treatment system according to claim 1, characterized in that: The tank body is in a cylindrical structure, the exhaust pipe is in an L-shaped structure, the central distributor is in a tubular structure, and the central axis of the central distributor is arranged to coincide with the central axis of the tank body.

7. The flare gas collection, recovery and treatment system according to claim 1, characterized in that: The gas cabinet includes a cabinet body, a top cover with a sealing cover arranged on the top of the cabinet body, and a piston movably arranged in the cabinet body.

8. The flare gas collection, recovery and treatment system according to claim 7, characterized in that: A gas inlet and a gas outlet are symmetrically provided at the bottom of the side wall of the cabinet, and guide grooves are symmetrically provided on the inner side wall of the cabinet. Both ends of the piston are slidably arranged in the guide grooves.

9. The flare gas collection, recovery and treatment system according to claim 8, characterized in that: A pressure sensor is installed in the middle of the inner bottom wall of the cabinet, a rangefinder is installed in the middle of the inner wall of the top cover, the gas outlet of the cabinet is connected to a gas pipe, a suction pump is installed on the gas pipe, and one end of the gas pipe is connected to the inlet of the direct-fired waste gas incinerator.

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