VOCs pollution treatment system
By designing a VOCs pollution control system with multi-stage treatment devices and safety equipment during the carbon black production process, the problem of VOCs emissions in carbon black production is solved, efficient purification and safe and reliable pollution control are achieved, and strict environmental protection standards are met.
Patent Information
- Application Number
- CN202411081959.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2024-12-17
AI Technical Summary
VOCs generated during carbon black production pose a threat to the environment and human health, and the prior art is difficult to effectively control the emission of these harmful volatile organic compounds.
A VOCs pollution control system was designed, including multi-stage treatment devices such as oil washing towers, liquid sealing tanks and exhaust combustion furnaces, combined with fans, flame arresters and liquid sealing safety valves, through multi-stage treatment processes such as oil washing and liquid sealing. , exhaust gas combustion and exhaust gas desulfurization and denitrification to achieve efficient purification of VOCs.
It realizes efficient purification of VOCs, ensures operational safety, reduces pollutant emissions, complies with strict environmental protection standards, and ensures the stable operation and continuous supply of the system through the design of liquid-sealed safety valves and chemical storage tanks.
Smart Images
Figure CN119139894A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of air pollution control, and in particular to a VOCs pollution control system. Background Art
[0002] In the carbon black industry, VOCs are generated almost throughout the entire production process. Starting from the pyrolysis of raw materials, this step usually involves the decomposition of organic matter at high temperatures, which will release a series of harmful volatile organic compounds, such as benzene, toluene and xylene. These compounds not only pose a threat to the environment, but also are potential hazards to human health. The oxidation process is another important step in the production of carbon black, which generates carbon black and water through the reaction of oxygen and hydrocarbons. In this process, due to the increase in temperature and the progress of oxidation reactions, a variety of VOCs will be further generated, including various alcohols and ketone compounds. If these substances are not controlled, they will have a serious impact on the surrounding environment and operators. The subsequent treatment of carbon black production also involves the use of a large amount of solvents. These solvents are mainly used in the cleaning and purification process of carbon black to ensure the quality and performance of the product. However, VOCs in solvents, such as acetone and methanol, are very easy to evaporate into the atmosphere, causing air pollution and health risks. Summary of the invention
[0003] The purpose of the present invention is to provide a VOCs pollution control system, which efficiently purifies gas through a multi-stage treatment device, and is equipped with an oil washing tower, a liquid sealing tank, an exhaust gas combustion furnace, etc. The system integrates safety equipment to ensure stable operation, and the environmental protection design meets emission standards to achieve safe and reliable pollution control.
[0004] To achieve the above object, the present invention provides the following technical solution: a VOCs pollution control system, characterized in that it comprises an oil storage tank, wherein there are multiple oil storage tanks, each of which is connected to a gas main, and the gas main is connected to a partition buffer tank pipeline, wherein the multiple oil storage tanks, the gas main, and the partition buffer tank constitute an oil tank partition, wherein there are multiple oil tank partitions, and each partition buffer tank is connected to the main buffer tank pipeline; The total buffer tank is connected to the oil washing tower pipeline, the oil washing tower is connected to the liquid sealing tank pipeline, the liquid sealing tank is connected to the tail gas combustion furnace pipeline, the exhaust port of the tail gas combustion furnace is connected to the exhaust gas denitrification tower pipeline, and the exhaust gas denitrification tower is connected to the exhaust gas desulfurization tower pipeline; The oil washing tower and the tops of the multiple oil storage tanks are all equipped with liquid-sealed safety valves. The oil washing tower is also connected to the reagent storage tank and the transfer tank. The transfer tank is connected to the main buffer tank pipeline.
[0005] Preferably, a fan is provided at the air inlet end of the gas main pipe, a flame arrester is provided at the air delivery end of the gas main pipe, and a fan is provided at the air inlet end of the pipeline between the oil washing tower and the liquid seal tank.
[0006] Preferably, the oil washing tower is provided with a circulating water tank cabin, an oil washing tank, and an air outlet channel, the oil washing tank is located above the circulating water tank cabin, a reflux channel is provided at the bottom of the oil washing tank, the reflux channel is connected with the circulating water tank cabin, the circulating water tank cabin is connected with the preceding process, the air outlet channel is located above the oil washing tank, the air outlet channel is connected with the oil washing tank, and the connection between the oil washing tower and the liquid seal tank is completed by connecting the air outlet channel with the air inlet end pipeline of the liquid seal tank.
[0007] Preferably, a primary cyclone plate, a secondary cyclone plate and a defogger plate are fixedly installed in the oil washing tank, the primary cyclone plate is located below the secondary cyclone plate, the secondary cyclone plate is located below the defogger plate, a dosing channel is provided between the secondary cyclone plate and the defogger plate, and the connection between the oil washing tower and the reagent storage tank is completed by connecting the electromagnetic valve of the reagent storage tank with the dosing channel pipe.
[0008] Preferably, an air inlet channel and an abnormal air vent channel are provided on the side of the oil washing tower, and the air inlet channel and the abnormal air vent channel are both connected to the oil washing tank. The air inlet channel is located between the primary cyclone plate and the reflux channel, and the abnormal air vent channel is located above the defogger plate. The abnormal air vent channel is installed with a liquid-sealed safety valve.
[0009] Preferably, the reagent storage tank stores absorbent, and the absorbent is selected from one of washing oil, coal tar, and anthracene oil. A water pump is provided in the connecting pipe between the electromagnetic valve of the reagent storage tank and the dosing channel, and the water pump transports the absorbent to the oil washing tower.
[0010] Preferably, the liquid-sealed safety valve comprises a shell, a liquid-sealed cabin is arranged in the shell, the top of the liquid-sealed cabin is connected with the air outlet (9-3), an air inlet pipe extends into the interior of the liquid-sealed cabin, the liquid-sealed section at the front end of the air inlet pipe is in a "U" shape, the liquid-sealed cabin stores sealing liquid, the side wall of the liquid-sealed cabin is also provided with a liquid-sealed port, the liquid-sealed port is connected with a water pump through a pipeline, and the water pump is connected with the front process.
[0011] Preferably, a travel switch is installed on the top of the liquid seal cabin, the travel switch is sleeved with a sleeve seat, the sleeve is fixedly installed with a sleeve, the bottom of the sleeve is provided with a through hole, and a float is slidably installed in the sleeve; when the sealing liquid in the liquid seal cabin exceeds the liquid seal section at the front end of the intake pipe, the float rises and triggers the travel switch, and the travel switch sends a stop signal to the water pump; when the sealing liquid level in the liquid seal cabin is lower than the liquid seal section at the front end of the intake pipe, the float falls, and the travel switch sends a start signal to the water pump.
[0012] Preferably, the connection between the multiple oil storage tanks and the gas main is completed by connecting the gas main to the liquid seal safety valve; when the VOCS gas in the oil tank exceeds the pressure of the liquid seal height in the liquid seal cabin, the VOCs gas flows out of the liquid seal cabin and is discharged into the gas main from the gas outlet (9-3).
[0013] Preferably, the connection between the oil washing tower and the transfer tank is completed by connecting the transfer tank to a liquid-sealed safety valve; when too much VOCs gas accumulates in the oil washing tower and cannot be discharged, it will flow into the liquid-sealed safety valve and be discharged into the transfer tank through the liquid-sealed safety valve.
[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Through a multi-stage treatment process, including oil washing, liquid sealing, tail gas combustion and waste gas desulfurization and denitrification, efficient purification of VOCs can be achieved.
[0015] 2. The system integrates fans, flame arresters, liquid-sealed safety valves and other equipment to ensure safety during operation and prevent gas backflow and fire risks.
[0016] 3. The internal structure design of the oil washing tower optimizes the gas treatment process and improves the treatment efficiency through the swirl plate and the demister plate.
[0017] 4. The travel switch of the liquid-sealed safety valve can automatically start and stop the water pump according to the liquid level, maintain the appropriate level of sealing liquid in the system, and ensure stable operation of the system.
[0018] 5. The reagent storage tank provides absorbent to the system, which enhances the treatment effect of VOCs, and the reagent delivery is completed by a water pump to ensure continuous supply.
[0019] 6. The system design complies with environmental protection requirements, can effectively reduce pollutant emissions, and meets increasingly stringent environmental protection standards. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of a VOCs pollution control system of the present invention; Figure 2 A schematic cross-sectional view of an oil washing tower of a VOCs pollution control system according to the present invention; Figure 3 A cross-sectional schematic diagram of a VOCs pollution control system sealed safety valve of the present invention; In the figure: 1. Oil storage tank; 2. Gas main pipe; 3. Partition buffer tank; 4. Main buffer tank; 5. Oil washing tower; 5-1. Circulating water tank compartment; 5-2. Oil washing tank; 5-3. Air outlet channel; 5-4. Reflux channel; 5-5. Abnormal air discharge channel; 5-6. Primary cyclone plate; 5-7. Secondary cyclone plate; 5-8. Demisting plate; 5-9. Dosing channel; 5-10. Air intake channel; 6. Liquid seal tank; 7. Tail gas combustion furnace; 8. Waste gas denitration tower; 9. Liquid seal safety valve; 9-1. Shell 9-2. Liquid seal compartment; 9-3. Air outlet; 9-4. Air intake pipe; 9-5. Liquid seal port; 9-6. Travel switch; 9-7. Sleeve seat; 9-8. Sleeve; 9-9, through hole; 10, exhaust gas desulfurization tower; 11, reagent storage tank; 12, transfer tank; 13, fan; 14, flame arrester; 15, fan. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0022] Please see attached Figure 1 -Attached Figure 3 As shown, the present invention provides a technical solution: a VOCs pollution control system, characterized in that it includes an oil storage tank 1, there are multiple oil storage tanks 1, the multiple oil storage tanks 1 are respectively connected to the gas main 2, the gas main 2 is connected to the partition buffer tank 3 by pipeline, the multiple oil storage tanks 1, the gas main 2, and the partition buffer tank 3 form an oil tank partition, there are multiple oil tank partitions, and each partition buffer tank 3 is connected to the main buffer tank 4 by pipeline; The total buffer tank 4 is connected to the oil washing tower 5 by pipeline, the oil washing tower 5 is connected to the liquid sealing tank 6 by pipeline, the liquid sealing tank 6 is connected to the tail gas combustion furnace 7 by pipeline, the exhaust port of the tail gas combustion furnace 7 is connected to the exhaust gas denitration tower 8 by pipeline, and the exhaust gas denitration tower 8 is connected to the exhaust gas desulfurization tower 10 by pipeline; a circulating water tank cabin 5-1, an oil washing tank 5-2 and an air outlet channel 5-3 are arranged in the oil washing tower 5, the oil washing tank 5-2 is located above the circulating water tank cabin 5-1, a reflux channel 5-4 is arranged at the bottom of the oil washing tank 5-2, the reflux channel 5-4 is communicated with the circulating water tank cabin 5-1, the circulating water tank cabin 5-1 is communicated with the preceding process, the air outlet channel 5-3 is located above the oil washing tank 5-2, the air outlet channel 5-3 is communicated with the oil washing tank 5-2, and the connection between the oil washing tower 5 and the liquid sealing tank 6 is completed by connecting the air outlet channel 5-3 with the air inlet end pipeline of the liquid sealing tank 6. A primary cyclone plate 5-6, a secondary cyclone plate 5-7, and a defogger plate 5-8 are fixedly installed in the oil washing tank 5-2. The primary cyclone plate 5-6 is located below the secondary cyclone plate 5-7, and the secondary cyclone plate 5-7 is located below the defogger plate 5-8. A dosing channel 5-9 is provided between the secondary cyclone plate 5-7 and the defogger plate 5-8. The connection between the oil washing tower 5 and the reagent storage tank 11 is completed by connecting the electromagnetic valve of the reagent storage tank 11 with the dosing channel 5-9 pipeline. An air intake channel 5-10 and an abnormal air discharge channel 5-5 are provided on the side of the oil washing tower 5. The air intake channel 5-10 and the abnormal air discharge channel 5-5 are both connected to the oil washing tank 5-2. The air intake channel 5-10 is located between the primary cyclone plate 5-6 and the reflux channel 5-4. The abnormal air discharge channel 5-5 is located above the defogger plate 5-8. The abnormal air discharge channel 5-5 is installed with a liquid-sealed safety valve 9. The reagent storage tank 11 stores absorbent, and the absorbent is selected from one of washing oil, coal tar, and anthracene oil. A water pump is provided in the connecting pipe between the electromagnetic valve of the reagent storage tank 11 and the dosing channel 5-9, and the water pump transports the absorbent to the oil washing tower 5. A fan 13 is provided at the air inlet end of the gas main pipe 2, a flame arrester 14 is provided at the air delivery end of the gas main pipe 2, and a fan 15 is provided at the air inlet end of the pipeline between the oil washing tower 5 and the liquid seal tank 6.
[0023] The oil washing tower 5 and the top of the multiple oil storage tanks 1 are all installed with a liquid-sealed safety valve 9. The oil washing tower 5 is also connected to the reagent storage tank 11 and the transfer tank 12. The transfer tank 12 is connected to the main buffer tank 4 by pipeline. The liquid-sealed safety valve 9 includes a shell 9-1, in which a liquid-sealed cabin 9-2 is arranged. The top of the liquid-sealed cabin 9-2 is connected to the air outlet 9-3. An air inlet pipe 9-4 extends into the liquid-sealed cabin 9-2. The front end liquid-sealed section of the air inlet pipe 9-4 is in a "u" shape. The liquid-sealed cabin 9-2 stores sealing liquid. The side wall of the liquid-sealed cabin 9-2 is also provided with a liquid-sealed port 9-5. The liquid-sealed port 9-5 is connected to a water pump through a pipeline, and the water pump is connected to the front process. A travel switch 9-6 is installed on the top of the liquid seal tank 9-2. The travel switch 9-6 is sleeved with a sleeve seat 9-7. The sleeve seat 9-7 is fixedly installed with a sleeve 9-8. The bottom of the sleeve 9-8 is provided with a through hole 9-9. A floating ball 9-10 is slidably installed in the sleeve 9-8. When the sealing liquid in the liquid seal tank 9-2 exceeds the liquid seal section at the front end of the air inlet pipe 9-4, the floating ball 9-10 rises and triggers the travel switch 9-6. The travel switch sends a stop signal to the water pump. When the sealing liquid level in the liquid seal tank 9-2 is lower than the liquid seal section at the front end of the air inlet pipe 9-4, the floating ball 9-10 falls, and the travel switch 9-6 sends a start signal to the water pump. The connection between multiple oil storage tanks 1 and the gas main 2 is completed by connecting the liquid seal safety valve 9 to the gas main 2. When the VOCs gas in the oil tank exceeds the pressure of the liquid seal height in the liquid seal tank 9-2, the VOCs gas flows out of the liquid seal tank 9-2 and is discharged into the gas main 2 from the gas outlet 9-3. The connection between the oil washing tower 5 and the transfer tank 12 is completed by connecting the liquid-sealed safety valve 9 to the transfer tank 12; when too much VOCs gas accumulates in the oil washing tower 5 and cannot be discharged, it will flow into the liquid-sealed safety valve 9 and be discharged into the transfer tank 12 through the liquid-sealed safety valve 9.
Claims
1. A VOCs pollution control system, characterized in that: The invention comprises an oil storage tank (1), wherein the oil storage tank (1) is multiple, the multiple oil storage tanks (1) are respectively connected to a gas main pipe (2), the gas main pipe (2) is connected to a partition buffer tank (3) by pipeline, the multiple oil storage tanks (1), the gas main pipe (2), and the partition buffer tank (3) form an oil tank partition, the oil tank partition is multiple, and each partition buffer tank (3) is connected to a main buffer tank (4) by pipeline; The main buffer tank (4) is connected to the oil washing tower (5) by pipeline, the oil washing tower (5) is connected to the liquid sealing tank (6) by pipeline, the liquid sealing tank (6) is connected to the tail gas combustion furnace (7) by pipeline, the exhaust port of the tail gas combustion furnace (7) is connected to the exhaust gas denitration tower (8) by pipeline, and the exhaust gas denitration tower (8) is connected to the exhaust gas desulfurization tower (10) by pipeline; The oil washing tower (5) and the tops of the multiple oil storage tanks (1) are all equipped with liquid-sealed safety valves (9). The oil washing tower (5) is also connected to a reagent storage tank (11) and a transfer tank (12). The transfer tank (12) is connected to the main buffer tank (4) via a pipeline.
2. A VOCs pollution control system according to claim 1, characterized in that: The air inlet end of the gas main pipe (2) is provided with a fan (13), the air delivery end of the gas main pipe (2) is provided with a flame arrester (14), and the air inlet end of the pipeline between the oil washing tower (5) and the liquid sealing tank (6) is provided with a fan (15).
3. A VOCs pollution control system according to claim 1, characterized in that: The oil washing tower (5) is provided with a circulating water tank cabin (5-1), an oil washing tank (5-2), and an air outlet channel (5-3). The oil washing tank (5-2) is located above the circulating water tank cabin (5-1). A reflux channel (5-4) is provided at the bottom of the oil washing tank (5-2). The reflux channel (5-4) is connected to the circulating water tank cabin (5-1). The circulating water tank cabin (5-1) is connected to the previous process. The air outlet channel (5-3) is located above the oil washing tank (5-2). The air outlet channel (5-3) is connected to the oil washing tank (5-2). The connection between the oil washing tower (5) and the liquid sealing tank (6) is completed by connecting the air outlet channel (5-3) to the air inlet pipe of the liquid sealing tank (6).
4. A VOCs pollution control system according to claim 3, characterized in that: A primary cyclone plate (5-6), a secondary cyclone plate (5-7), and a demister plate (5-8) are fixedly installed in the oil washing tank (5-2); the primary cyclone plate (5-6) is located below the secondary cyclone plate (5-7); the secondary cyclone plate (5-7) is located below the demister plate (5-8); a dosing channel (5-9) is provided between the secondary cyclone plate (5-7) and the demister plate (5-8); the connection between the oil washing tower (5) and the reagent storage tank (11) is completed by connecting the electromagnetic valve of the reagent storage tank (11) and the dosing channel (5-9) through a pipeline.
5. A VOCs pollution control system according to claim 3, characterized in that: The oil washing tower (5) is provided with an air intake channel (5-10) and an abnormal air discharge channel (5-5) on the side thereof. The air intake channel (5-10) and the abnormal air discharge channel (5-5) are both connected to the oil washing tank (5-2). The air intake channel (5-10) is located between the primary cyclone plate (5-6) and the reflux channel (5-4). The abnormal air discharge channel (5-5) is located above the demister plate (5-8). The abnormal air discharge channel (5-5) is provided with a liquid-sealed safety valve (9).
6. A VOCs pollution control system according to claim 1, characterized in that: The reagent storage tank (11) stores an absorbent, and the absorbent is selected from one of washing oil, coal tar, and anthracene oil. A water pump is provided in a connecting pipe between the electromagnetic valve of the reagent storage tank (11) and the dosing channel (5-9), and the water pump transports the absorbent to the oil washing tower (5).
7. A VOCs pollution control system according to claim 1, characterized in that: The liquid-sealed safety valve (9) comprises a shell (9-1), a liquid-sealed cabin (9-2) is arranged in the shell, the top of the liquid-sealed cabin (9-2) is connected to the air outlet (9-3), an air inlet pipe (9-4) extends into the liquid-sealed cabin (9-2), the front end liquid-sealed section of the air inlet pipe (9-4) is in a "U" shape, the liquid-sealed cabin (9-2) stores sealing liquid, the side wall of the liquid-sealed cabin (9-2) is also provided with a liquid-sealed port (9-5), the liquid-sealed port (9-5) is connected to a water pump through a pipeline, and the water pump is connected to a front process.
8. A VOCs pollution control system according to claim 7, characterized in that: A travel switch (9-6) is installed on the top of the liquid seal cabin (9-2), the travel switch (9-6) is sleeved with a sleeve seat (9-7), a sleeve (9-8) is fixedly installed on the sleeve seat (9-7), a through hole (9-9) is provided at the bottom of the sleeve (9-8), and a floating ball (9-10) is slidably installed in the sleeve (9-8); when the sealing liquid in the liquid seal cabin (9-2) exceeds the front end liquid seal section of the air intake pipe (9-4), the floating ball (9-10) rises and triggers the travel switch (9-6), and the travel switch sends a stop signal to the water pump; when the sealing liquid level in the liquid seal cabin (9-2) is lower than the front end liquid seal section of the air intake pipe (9-4), the floating ball (9-10) falls, and the travel switch (9-6) sends a start signal to the water pump.
9. A VOCs pollution control system according to claim 1, characterized in that: The connection between the plurality of oil storage tanks (1) and the gas main pipe (2) is achieved by connecting a liquid-sealed safety valve (9) to the gas main pipe (2); when the pressure of the VOCS gas in the oil tank exceeds the liquid seal height in the liquid seal cabin (9-2), the VOCs gas flows out of the liquid seal cabin (9-2) and is discharged into the gas main pipe (2) from the gas outlet (9-3).
10. A VOCs pollution control system according to claim 1, characterized in that: The connection between the oil washing tower (5) and the transfer tank (12) is completed by connecting the liquid-sealed safety valve (9) to the transfer tank (12); when too much VOCs gas accumulates in the oil washing tower (5) and cannot be discharged, it will flow into the liquid-sealed safety valve (9) and be discharged into the transfer tank (12) through the liquid-sealed safety valve (9).