Volatile organic compound treatment system

Abstract

The utility model discloses a volatile organic compound treatment system which comprises a dangerous waste material bin compatibility area, waste gas at the inner position of the dangerous waste material bin compatibility area enters a rotary kiln located at the left side position to be cracked, the rotary kiln burns waste materials through a burner at the inner position, and the waste materials are discharged through a discharge port. A secondary combustion chamber is arranged on the left side of the combustor, all nodes of a waste gas incineration system are monitored by an online CEMS system in the whole process, an operation system is automatically controlled and executed by receiving signals through a DCS control room, a large amount of VOC gas generated by hazardous waste compatibility bins is subjected to innovative and advanced technological processes, the concentration of organic matter is reduced, stable operation is achieved, and harm is avoided; and finally discharging after reaching the standard.

Description

Technical Field

[0001] The utility model belongs to the technical field related to volatile organic compound treatment systems, and specifically relates to a volatile organic compound treatment system. Background Art

[0002] Hazardous waste incineration is currently widely used in my country's environmental protection field to treat hazardous waste and liquid products. In the current process flow of hazardous waste incineration VOC treatment system, a large amount of harmful gas VOC containing organic matter is generated in the material matching link before incineration. After simple filtration, the waste gas is discharged into the atmosphere, causing pollution to the atmospheric environment, and when the human body inhales the polluted gas, it is harmful to human health. Utility Model Content

[0003] The purpose of the utility model is to provide a volatile organic compound treatment system to solve the problem mentioned in the above background technology. Hazardous waste incineration is currently widely used in the field of environmental protection in my country to treat hazardous waste and liquid products. In the current process flow of hazardous waste incineration VOC treatment system, a large amount of harmful gas VOC containing organic matter is generated in the material matching link of the previous process before incineration treatment. The waste gas is discharged into the atmosphere after simple filtration, causing pollution to the atmospheric environment, and after the human body inhales the polluted gas, it is harmful to human health.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a volatile organic compound treatment system, including a hazardous waste bin matching area, the exhaust gas at the internal position of the hazardous waste bin matching area enters into a rotary kiln located at the left position for cracking, the rotary kiln burns the waste through a burner at the internal position, a secondary combustion chamber is arranged at the left position of the burner, an emergency discharge device is arranged at the upper end position of the secondary combustion chamber, the secondary combustion chamber discharges the waste slag through a slag discharge port located at the lower end position, a waste heat boiler is arranged at the left position of the secondary combustion chamber, a quenching tower for cooling the exhaust gas is arranged at the left position of the waste heat boiler, the exhaust gas from the quenching tower enters into a cyclone dust collector located at the left position for dust removal after being cooled down by the cyclone dust collector, the exhaust gas after dust removal by the cyclone dust collector enters into a dry reaction tower located at the upper end position, the upper end position of the dry reaction tower A slaked lime dosing bin is provided at the location, the dry reaction tower conveys the exhaust gas to the filter located at the left position for filtration, the exhaust gas enters the activated carbon dosing bin located at the left position after filtration, a bag filter for dust removal is installed at the left position of the activated carbon dosing bin, the bag filter for dust removal continues to move forward through the induced draft fan A at the left position after dust removal of the exhaust gas, the induced draft fan A introduces the exhaust gas after dust removal into the wet tower located at the left position, the wet tower cools down the exhaust gas and washes it with water, and then conveys it to the VOC exhaust gas heater located at the left position, an induced draft fan B is installed at the left position of the VOC exhaust gas heater, the induced draft fan B conveys the treated exhaust gas to the chimney, the chimney monitors the exhaust gas quality through the CEMS monitoring room, and the CEMS monitoring room transmits the monitored data to the DCS program control cabinet.

[0005] Preferably, the hazardous waste silo preparation area is mainly divided into a crushing operation area, a bulk area and a preparation area. The VOC waste gas generated during the preparation process in the hazardous waste silo preparation area is completely collected by the VOC collection system and centrally transported through the VOC pipeline system into the rotary kiln for cracking.

[0006] Preferably, the residence time of hazardous waste inside the rotary kiln is twenty to one hundred and twenty minutes. The hazardous waste processed by the rotary kiln is mainly converted into high-temperature VOC waste gas and slag after high-temperature incineration. The high-temperature VOC waste gas generated inside the rotary kiln enters the secondary combustion chamber for further combustion.

[0007] Preferably, the slag produced by the rotary kiln enters the bottom of the secondary combustion chamber and is discharged through the slag discharge port. The secondary combustion chamber further burns the incompletely burned exhaust gas in the rotary kiln. The emergency discharge device will automatically open when the secondary combustion chamber fails.

[0008] Preferably, the waste heat boiler can recover waste heat and supply heat to the outside. The waste heat boiler reduces the temperature of the high-temperature VOC waste gas of 1,100 degrees Celsius to 550 degrees Celsius after efficient heat exchange. The quenching tower sprays cooling water into the internal position through a high-efficiency two-fluid atomizing nozzle specially used for incineration, so that the VOC waste gas flue gas is reduced from 550 degrees Celsius to 180 degrees Celsius within one second.

[0009] Preferably, the cyclone dust collector separates and collects larger dust particles in the VOC waste gas through cyclone centrifugal action, the cyclone dust collector enters the dry reaction tower from the exhaust pipe, and the slaked lime dosing bin sprays powdered slaked lime into the waste gas for reaction.

[0010] Preferably, the bag filter intercepts smaller particles in the VOC exhaust gas through the filter cake at the outer surface, the first stage of the wet tower is to reduce the temperature to seventy degrees Celsius after cooling and water washing, and the second stage of the wet tower can fully neutralize the alkaline and acidic VOC exhaust gases.

[0011] Preferably, the CEMS monitoring room monitors the quality of VOC waste gas and flue gas, and the DCS programmable control cabinet automatically controls the operating system.

[0012] Compared with the prior art, the utility model provides a volatile organic compound treatment system, which has the following beneficial effects:

[0013] The entire operating system is automatically monitored and controlled by the CEMS monitoring room, and the opening and closing of valves at each node are executed by instructions from the programmable control cabinet. The technology is advanced, the VOC waste gas is treated and incinerated and cracked thoroughly, and various on-site data are collected by the CEM monitoring room and transmitted to the central control room of the incineration workshop through the on-site high-speed data bus for centralized monitoring and management. Similarly, the control commands of the host in the central control room are also transmitted to the on-site DCS programmable control cabinet terminal through the above-mentioned high-speed bus to implement decentralized control of each unit. The process system ensures smooth, unimpeded and reliable on-site operations, improves work efficiency, and reduces the concentration of organic matter through innovative and advanced process flows, stabilizes operation to make it non-hazardous, and ultimately achieves standard emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic diagram of the structure of a volatile organic compound treatment system.

[0015] Figure 2 The utility model is a schematic diagram of the structure of a CEMS monitoring room of a volatile organic compound treatment system.

[0016] FIG3 is a schematic diagram of the structure of a DCS program-controlled cabinet of a volatile organic compound treatment system of the present invention.

[0017] Figure 4The utility model is a schematic diagram of the flow structure of a VOC treatment process system of a volatile organic compound treatment system.

[0018] In the figure: 1. Hazardous waste storage area; 2. Rotary kiln; 3. Burner; 4. Secondary combustion chamber; 401. Emergency discharge device; 402. Slag discharge port; 5. Waste heat boiler; 6. Rapid cooling tower; 7. Cyclone dust collector; 8. Dry reaction tower; 801. Slaked lime dosing bin; 9. Filter; 10. Activated carbon dosing bin; 11. Bag filter; 12. Draft fan A; 13. Wet tower; 14. VOC exhaust gas heater; 15. Draft fan B; 16. Chimney; 17. CEMS monitoring room; 18. DCS control cabinet. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] The utility model provides Figure 1-4A volatile organic compound treatment system shown in the figure includes a hazardous waste bin compatibility area 1, the waste gas at the internal position of the hazardous waste bin compatibility area 1 enters the rotary kiln 2 located at the left position for cracking, the rotary kiln 2 burns the waste through the burner 3 at the internal position, a secondary combustion chamber 4 is arranged at the left position of the burner 3, an emergency discharge device 401 is arranged at the upper end position of the secondary combustion chamber 4, the secondary combustion chamber 4 discharges the waste slag through the slag discharge port 402 located at the lower end position, a waste heat boiler 5 is arranged at the left position of the secondary combustion chamber 4, a quenching tower 6 for cooling the waste gas is arranged at the left position of the waste heat boiler 5, the waste gas from the quenching tower 6 after cooling enters the cyclone dust collector 7 located at the left position for dust removal, the waste gas after dust removal by the cyclone dust collector 7 enters the dry reaction tower 8 located at the upper end position, a slaked lime dosing bin 801 is arranged at the upper end position of the dry reaction tower 8, The reaction tower 8 transports the exhaust gas to the filter 9 located on the left side for filtration. After the filtration is completed, the exhaust gas enters the activated carbon dosing bin 10 located on the left side. A bag dust collector 11 for dust removal is installed on the left side of the activated carbon dosing bin 10. After the bag dust collector 11 completes the dust removal of the exhaust gas, it continues to move forward through the induced draft fan A12 on the left side. The induced draft fan A12 introduces the exhaust gas after dust removal into the wet tower 13 located on the left side. The wet tower 13 cools and washes the exhaust gas and then transports it to the VOC exhaust gas heater 14 located on the left side. An induced draft fan B15 is installed on the left side of the VOC exhaust gas heater 14. The induced draft fan B15 transports the treated exhaust gas to the chimney 16. The chimney 16 monitors the exhaust gas quality through the CEMS monitoring room 17. The CEMS monitoring room 17 transmits the monitored data to the DCS programmable control cabinet 18.

[0021] The VOC waste gas generated by the external pipeline input or the hazardous waste silo matching area 1 is transported to the rotary kiln 2 through the VOC treatment process system. In the rotary kiln 2, the waste undergoes the ignition stage, the combustion stage and the burnout stage in sequence. The high-temperature VOC waste gas generated by the combustion enters the secondary combustion chamber 4 to continue to burn. The generated slag is discharged from the system through the slag discharge port 402. The burner 3 fully incinerates and cracks it at a high temperature of 1,100 to 1,200 degrees Celsius, and then enters the secondary combustion chamber 4 to continue high-temperature full incineration and cracking. The secondary combustion chamber 4 outlet The VOC waste gas enters the waste heat boiler 5 and the quench tower 6 in turn for cooling. The waste heat boiler 5 uses the heat generated by incineration to generate steam. After the high-temperature VOC waste gas enters the quench tower 6, water directly contacts the VOC waste gas and instantly and sharply cools it down to 180 degrees Celsius within one second to avoid the generation of dioxins. The VOC waste gas at the outlet of the quench tower 6 is removed by the tangential centrifugal action of the cyclone dust collector 7 and then enters the dry reaction tower 8. The acidic gas in the VOC waste gas reacts with the slaked lime to produce The VOC waste gas in the flue is adsorbed by the activated carbon injected into the flue. The VOC waste gas enters the flue and passes through the bag filter 11. The dust and heavy metal particles are removed to a certain extent. Then the VOC waste gas enters the bag filter 11 to reduce the dust concentration in the VOC waste gas. The VOC waste gas at the outlet of the bag filter 11 is purified in the neutralization tower 13. The acidic gas, particulate matter, heavy metals and dioxins are effectively controlled and removed. After washing in the wet tower 13, the VOC waste gas The moisture content in OC waste gas is relatively high, and white smoke may appear. The steam generated by the waste heat boiler 5 is used to heat the VOC waste gas through the VOC waste gas heater 14. The low-temperature VOC waste gas is directly heated from 70 to 130 degrees Celsius, and the VOC waste gas discharged into the chimney 16 is returned to above the dew point, which can prevent the above situation from occurring. The steam condensate is recycled and reused, and the VOC waste gas at the outlet of the VOC flue gas heater is discharged into the atmosphere through the chimney 16 through the action of the induced draft fan and meets the standards.

[0022] like Figure 1 and Figure 4 As shown, the hazardous waste silo preparation area 1 is mainly divided into a crushing operation area, a bulk area and a preparation area. The VOC waste gas generated during the preparation process in the hazardous waste silo preparation area 1 is completely collected by the VOC collection system and centrally transported through the VOC pipeline system to enter the rotary kiln 2 for cracking. The residence time of hazardous waste inside the rotary kiln 2 is twenty to one hundred and twenty minutes. The rotary kiln 2 processes hazardous waste and mainly converts it into high-temperature VOC waste gas and slag after high-temperature incineration. The high-temperature VOC waste gas generated inside the rotary kiln 2 enters the secondary combustion chamber 4 for further combustion, and the slag generated by the rotary kiln 2 enters the bottom of the secondary combustion chamber 4 and is discharged through the slag discharge port 402. The secondary combustion chamber 4 further burns the incompletely burned waste gas in the rotary kiln 2, and the emergency discharge device 401 will automatically open when the secondary combustion chamber 4 fails.

[0023] The storage system of the incineration workshop is mainly composed of the hazardous waste silo matching area 1, the grab feeding area, etc. The hazardous waste silo matching area 1 adopts a fully enclosed design, which is divided into a crushing operation area, a high calorific value bulk solid waste area, a medium calorific value bulk solid waste area, a matching area, etc., which is mainly used for solid waste aggregation, crushing and matching. The hazardous waste silo matching area 1 is mainly divided into a crushing operation area, a bulk area and a matching area. The crushing operation area is used for unloading, feeding, crushing and aggregation of large materials and packaging barrels. The bulk area is divided into a high calorific value area and a medium calorific value area, which are used for unloading and aggregation of high calorific value solid waste and medium calorific value solid waste respectively. The VOC waste gas generated in the matching process is completely collected by the VOC collection system and concentratedly transported through the VOC pipeline system into the rotary kiln 2 for incineration and cracking.

[0024] like Figure 2 and Figure 3 As shown, the waste heat boiler 5 can recover waste heat and supply heat to the outside. The waste heat boiler 5 reduces the temperature of the high-temperature VOC waste gas of 1,100 degrees Celsius to 550 degrees Celsius after efficient heat exchange. The quenching tower 6 sprays cooling water into the internal position through a high-efficiency two-fluid atomizing nozzle specially used for incineration, so that the VOC waste gas flue gas drops from 550 degrees Celsius to 180 degrees Celsius within one second. The cyclone dust collector 7 separates and collects the larger dust particles in the VOC waste gas flue gas through the centrifugal action of the cyclone. The dust collector 7 enters the dry reaction tower 8 from the exhaust pipe, and the slaked lime dosing bin 801 sprays the powdered slaked lime into the waste gas for reaction. The bag filter 11 intercepts the smaller particles in the VOC waste gas and flue gas through the filter cake at the outer surface position. The first stage of the wet tower 13 is to reduce the temperature to seventy degrees Celsius after cooling and water washing. The second stage of the wet tower 13 can fully neutralize the alkaline and acidic VOC waste gas. The CEMS monitoring room 17 monitors the quality of the discharged VOC waste gas and flue gas, and the DCS programmable control cabinet 18 automatically controls the operating system.

[0025] The operating system is automatically monitored and controlled by the CEMS monitoring room 17 throughout the process, and the opening and closing of valves at each node are executed by instructions from the programmable control cabinet. The process is advanced, the VOC waste gas is treated and incinerated and cracked thoroughly, and various on-site data are collected by the CEM monitoring room and transmitted to the central control room of the incineration workshop through the on-site high-speed data bus for centralized monitoring and management. Similarly, the control commands of the host in the central control room are also transmitted to the on-site DCS programmable control cabinet 18 terminal through the above-mentioned high-speed bus to implement decentralized control of each unit. The process system ensures smooth, unimpeded and reliable on-site operations, improves work efficiency, and reduces the concentration of organic matter through innovative and advanced process flows, stabilizes operation to make it non-hazardous, and ultimately achieves standard emissions.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can 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 should be included in the protection scope of the present invention.

Claims

1. A volatile organic compound treatment system, characterized in that: The invention comprises a hazardous waste storage bin matching area (1), wherein waste gas at an internal position of the hazardous waste storage bin matching area (1) enters a rotary kiln (2) located at a left position for cracking, wherein the rotary kiln (2) burns the waste through a burner (3) located at an internal position, wherein a secondary combustion chamber (4) is arranged at a left position of the burner (3), wherein an emergency discharge device (401) is arranged at an upper end position of the secondary combustion chamber (4), and wherein the secondary combustion chamber (4) discharges the waste slag through a slag discharge port (402) located at a lower end position. A waste heat boiler (5) is arranged at the left side of the secondary combustion chamber (4), and a quenching tower (6) for cooling the waste gas is arranged at the left side of the waste heat boiler (5). After the waste gas is cooled by the quenching tower (6), it enters a cyclone dust collector (7) located at the left side for dust removal. After the cyclone dust collector (7) removes dust, the waste gas enters a dry reaction tower (8) located at the upper end. A slaked lime dosing bin (801) is arranged at the upper end of the dry reaction tower (8). The waste gas is transported to a filter (9) located at the left side for filtration. After the filtration is completed by the filter (9), the waste gas enters an activated carbon dosing bin (10) located at the left side. A bag filter (11) for dust removal is installed at the left side of the activated carbon dosing bin (10). After the waste gas is dust-removed by the bag filter (11), the bag filter (11) continues to move forward through an induced draft fan A (12) located at the left side. The induced draft fan A (12) introduces the waste gas after dust removal into a wet tower (12) located at the left side. 3), the wet tower (13) cools and washes the waste gas and then conveys it to the VOC waste gas heater (14) located on the left side. An induced draft fan B (15) is installed on the left side of the VOC waste gas heater (14). The induced draft fan B (15) conveys the treated waste gas to the chimney (16). The chimney (16) monitors the waste gas quality through the CEMS monitoring room (17). The CEMS monitoring room (17) transmits the monitored data to the inside of the DCS program control cabinet (18).

2. A volatile organic compound treatment system according to claim 1, characterized in that: The hazardous waste storage bin preparation area (1) is mainly divided into a crushing operation area, a bulk area and a preparation area.

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