Waste gas treatment device for nylon waste granulation

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a waste gas treatment device for nylon waste granulation, which comprises a gas heat exchanger, a cyclone separator, a treatment box, a combustion box and a matched pipeline system. Gas subjected to back flushing desorption is treated by a pipeline heater and a catalytic assembly and then enters a combustion box to be subjected to high-temperature decomposition, a jacket heating system is arranged outside the combustion box, and high temperature is maintained through heat conduction oil circulation. And combusted gas is collected after being cooled by the gas-liquid heat exchanger. Through the arrangement of the catalytic pipeline and the transfer bottle which are connected in parallel, continuous operation of the device is guaranteed, waste heat of part of the device is recycled through the gas heat exchanger and the gas-liquid heat exchanger, the solar panel and the storage battery pack are additionally arranged in the device to supply heat to part of the device, and energy consumption of the device in the using process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically a waste gas treatment device for nylon waste granulation. Background Technology

[0002] The granulation process of nylon waste generates waste gas containing dust and volatile organic compounds (VOCs). Currently, the main method for treating dust-containing organic waste gas is a combination of adsorption and combustion. This involves using materials with adsorption effects, such as activated carbon or zeolite, to desorb VOCs. After increasing the concentration of VOCs through desorption, they are then decomposed into environmentally harmless substances through catalytic combustion. However, the adsorption capacity of adsorption materials has certain limitations, and the catalytic combustion process is prone to catalyst poisoning when the concentration of VOCs is too high. Furthermore, the combustion process consumes a lot of energy, which affects the waste gas treatment effect of continuously operating equipment and requires periodic shutdowns for maintenance, which is not conducive to continuous production. Therefore, it is necessary to develop a waste gas treatment device for nylon waste granulation that can operate continuously, has a stable waste gas treatment effect, and is energy-saving. Utility Model Content

[0003] To address the above technical problems, this utility model provides a waste gas treatment device for nylon waste granulation that can operate continuously, has a stable waste gas treatment effect, and is energy-saving, in order to solve the problems that existing adsorption combustion waste gas treatment devices cannot meet the needs of continuous production, have reduced waste gas treatment effect after long-term use, and have high energy consumption.

[0004] To solve the above-mentioned technical problems, the present invention provides a waste gas treatment device for nylon waste granulation, comprising a gas heat exchanger, a cyclone separator, a treatment box, and a combustion box. The main pipe output end of the gas heat exchanger is connected to the input end of the cyclone separator, and the secondary pipe output end is connected to the backflush port of the treatment box. The top of the cyclone separator is connected to a transfer bottle via a connecting pipe. The output end of the transfer bottle is connected to the air inlet of the treatment box via a first gas supply pipe. The treatment box contains several adsorption layers, and the air outlet of the treatment box is connected to... The combustion chamber is connected, and a pipeline heater and a catalytic component are connected to the second gas supply pipe. A jacket is provided on the outside of the combustion chamber. The jacket is connected to a heating device through an oil inlet pipe and an oil outlet pipe. A liquid-gas heat exchanger is also connected to the oil outlet pipe. An air inlet pipe and an air outlet pipe are connected to the top of the combustion chamber. The air outlet pipe is connected to the gas input end of the liquid-gas heat exchanger. The gas output end of the liquid-gas heat exchanger is connected to a gas collection bottle through a delivery pipe. An induced draft fan is fixedly connected to the connecting pipe, the secondary output pipe, the second gas supply pipe, the air inlet pipe, and the delivery pipe.

[0005] Furthermore, valves are fixedly connected to both the first gas supply pipe and the gas inlet pipe.

[0006] Furthermore, the adsorption layer is filled with activated carbon.

[0007] Furthermore, the catalytic assembly consists of two catalytic tubes arranged in parallel. The two catalytic tubes are connected to two branches of two three-way valves through pipes on both sides. The other branch of the two three-way valves is connected to the second gas supply pipe.

[0008] Furthermore, the heating device includes a thermal oil furnace and a circulating pump. The upper part of the jacket is connected to the output end of the thermal oil furnace through an oil inlet pipe, and the lower part of the jacket is connected to the input end of the thermal oil furnace through an oil outlet pipe. The circulating pump is fixedly connected to the oil outlet pipe.

[0009] Furthermore, a solar panel is connected to the top of the thermal oil furnace via a support rod, and the solar panel is electrically connected to a battery pack, which is electrically connected to the thermal oil furnace and the pipe heater.

[0010] This utility model has the following advantages compared with the prior art:

[0011] This invention utilizes a dual-channel parallel catalytic tube design, coupled with three-way valves on both sides, to enable timely catalyst replacement, avoiding catalyst poisoning and the need for shutdown for replacement. A buffer bottle is incorporated to collect the dust-removed gas during the desorption of volatile organic compounds from the adsorption layer, eliminating the need for equipment replacement during the desorption process and ensuring continuous operation. A gas heat exchanger heats the air, and the heated gas is then passed into the treatment chamber to backflush the adsorption layer, improving the desorption effect and extending the lifespan of the adsorption material. A liquid-gas heat exchanger recovers waste heat from combustion and uses it to heat the thermal oil; combined with solar panels and a battery pack on the thermal oil furnace, this reduces the device's energy consumption. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] In the diagram: 1. Gas heat exchanger, 2. Cyclone separator, 3. Transfer bottle, 4. Processing box, 401. Air inlet, 402. Backflush port, 403. Adsorption layer, 5. Combustion box, 6. Jacket, 7. Pipeline heater, 8. Catalytic tube, 9. Oil inlet pipe, 10. Oil outlet pipe, 11. Thermal oil furnace, 12. Circulating pump, 13. Solar panel, 14. Liquid-gas heat exchanger, 15. Gas collecting bottle, 16. Connecting pipe, 17. First gas delivery pipe, 18. Second gas delivery pipe, 19. Secondary pipe, 20. Air inlet pipe, 21. Air outlet pipe, 22. Delivery pipe, 23. Three-way valve, 24. Valve, 25. Exhaust fan. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] like Figure 1 The device shown is a waste gas treatment device for nylon waste granulation, including a gas heat exchanger 1, a cyclone separator 2, a treatment chamber 4, and a combustion chamber 5. The main output end of the gas heat exchanger 1 is connected to the input end of the cyclone separator 2, and the output end of the secondary pipe 19 is connected to the backflush port 402 of the treatment chamber 4. Hot air heated by the gas heat exchanger 1 is used to backflush the adsorption layer 403 in the treatment chamber 4. The top gas output end of the cyclone separator 2 is connected to a transfer bottle 3 through a connecting pipe 16. A dust collection box is provided at the bottom of the cyclone separator 2. The output end of the transfer bottle 3 is connected to the air inlet 401 of the treatment chamber 4 through a first gas supply pipe 17. Several adsorption layers 403 are provided inside the treatment chamber 4. The air outlet of the treatment chamber 4 is connected to the combustion chamber 5 through a second gas supply pipe 18. A pipe heater 7 and a catalytic component are connected to the second gas supply pipe 18. A jacket 6 is provided on the outside of the combustion chamber 5 to ensure uniform reaction in all parts of the combustion chamber 5. The side wall of the combustion chamber 5 is provided with a rectangular protrusion extending into the chamber. The jacket 6 is connected to a heating device through the oil inlet pipe 9 and the oil outlet pipe 10. The heating device can reliably heat the jacket 6, i.e., the combustion chamber 5, to ensure the temperature inside the combustion chamber 5. After the exhaust gas is preheated by the pipeline heater 7, it passes through the catalytic component to reduce the reaction activation energy before entering the combustion chamber 5. The exhaust gas can be oxidized and decomposed into carbon dioxide and water without open flame. The oil outlet pipe 10 is also connected to the liquid-gas heat exchanger 14. The oil outlet pipe 10 is connected to the liquid channel of the liquid-gas heat exchanger 14. The top of the combustion chamber 5 is connected to the air inlet pipe 20 and the air outlet pipe 21. The air outlet pipe 21 is connected to the gas input end of the liquid-gas heat exchanger 14. The gas output end of the liquid-gas heat exchanger 14 is connected to the gas collection bottle 15 through the delivery pipe 22. The connecting pipe 16, the secondary pipe 19, the second gas delivery pipe 18, the air inlet pipe 20, and the delivery pipe 22 are all fixedly connected to the induced draft fan 25.

[0016] To ensure the reliable and automated operation of the device, valves 24 are fixedly connected to the first gas supply pipe 17 and the gas inlet pipe 20.

[0017] To ensure effective adsorption of waste gas, the adsorption layer 403 is filled with activated carbon.

[0018] To ensure the effectiveness of waste gas treatment and the continuous use of the device, the catalytic assembly consists of two parallel catalytic tubes 8. The two catalytic tubes 8 are connected to two branches of two three-way valves 23 through pipes on both sides. The other branch of the two three-way valves 23 is connected to the second gas supply pipe 18.

[0019] To ensure the temperature of the exhaust gas combustion treatment, the heating device includes a thermal oil furnace 11 and a circulating pump 12. The upper part of the jacket 6 is connected to the output end of the thermal oil furnace 11 through the oil inlet pipe 9, and the lower part of the jacket 6 is connected to the input end of the thermal oil furnace 11 through the oil outlet pipe 10. The circulating pump 12 is fixedly connected to the oil outlet pipe 10.

[0020] To reduce energy consumption during operation, a solar panel 13 is connected to the top of the thermal oil heater 11 via a connecting rod. The solar panel 13 is electrically connected to a battery pack. The battery pack is electrically connected to the thermal oil heater 11 and the pipe heater 7.

[0021] The working process of this embodiment is as follows:

[0022] After being cooled by the main pipe of gas heat exchanger 1, the exhaust gas enters cyclone separator 2 to remove large dust particles. It then enters treatment chamber 4 via transfer bottle 3, where volatile organic compounds (VOCs) are adsorbed by activated carbon adsorption layer 403. Valuation valve 24 on connecting pipe 16 is periodically closed, and induced draft fan 25 on secondary pipe 19 of gas heat exchanger 1 is activated to backflush and desorb the VOCs in adsorption layer 403. The desorbed gas is heated by pipeline heater 7. At this time, either of the two catalytic branches is opened by three-way valve 23, and the gas is catalyzed by catalytic tube 8 before entering combustion chamber 5 for high-temperature decomposition. The jacket 6 is heated by thermal oil heater 11 to maintain the combustion temperature. The combusted gas is cooled by liquid-gas heat exchanger 14 and collected in gas collection bottle 15. After the component concentration is detected and deemed appropriate, the gas is discharged. During the gas combustion process, valve 24 on inlet pipe 20 and induced draft fan 25 are periodically opened to introduce air and maintain the combustion environment.

Claims

1. A waste gas treatment device for nylon waste granulation, comprising a gas heat exchanger (1), a cyclone separator (2), a treatment box (4), and a combustion box (5), characterized in that: The main output end of the gas heat exchanger (1) is connected to the input end of the cyclone separator (2), and the output end of the secondary pipe (19) is connected to the backflush port (402) of the processing box (4). The top of the cyclone separator (2) is connected to a transfer bottle (3) through a connecting pipe (16). The output end of the transfer bottle (3) is connected to the air inlet (401) of the processing box (4) through a first gas supply pipe (17). Several adsorption layers (403) are provided inside the processing box (4). The air outlet of the processing box (4) is connected to the combustion box (5) through a second gas supply pipe (18). A pipe heater (7) and a catalytic component are connected to the second gas supply pipe (18). A jacket (6) is provided on the outside of the combustion chamber (5). The jacket (6) is connected to a heating device through an oil inlet pipe (9) and an oil outlet pipe (10). A liquid-gas heat exchanger (14) is also connected to the oil outlet pipe (10). An air inlet pipe (20) and an air outlet pipe (21) are connected to the top of the combustion chamber (5). The air outlet pipe (21) is connected to the gas input end of the liquid-gas heat exchanger (14). The gas output end of the liquid-gas heat exchanger (14) is connected to a gas collection bottle (15) through a delivery pipe (22). An induced draft fan (25) is fixedly connected to the connecting pipe (16), the secondary pipe (19), the second gas delivery pipe (18), the air inlet pipe (20), and the delivery pipe (22).

2. The waste gas treatment device for nylon waste granulation according to claim 1, characterized in that: Valves (24) are fixedly connected to the first gas supply pipe (17) and the gas inlet pipe (20).

3. The waste gas treatment device for nylon waste granulation according to claim 1, characterized in that: The adsorption layer (403) is filled with activated carbon.

4. The waste gas treatment device for nylon waste granulation according to claim 1, characterized in that: The catalytic assembly consists of two catalytic tubes (8) arranged in parallel. The two sides of the two catalytic tubes (8) are respectively connected to two branches of two three-way valves (23) through pipes. The other branch of the two three-way valves (23) is connected to the second gas transmission pipe (18).

5. The waste gas treatment device for nylon waste granulation according to claim 1, characterized in that: The heating device includes a thermal oil furnace (11) and a circulating pump (12). The upper part of the jacket (6) is connected to the output end of the thermal oil furnace (11) through an oil inlet pipe (9), and the lower part of the jacket (6) is connected to the input end of the thermal oil furnace (11) through an oil outlet pipe (10). The circulating pump (12) is fixedly connected to the oil outlet pipe (10).

6. The waste gas treatment device for nylon waste granulation according to claim 5, characterized in that: The top of the thermal oil furnace (11) is connected to a solar panel (13) via a connecting rod. The solar panel (13) is electrically connected to a battery pack. The battery pack is electrically connected to the thermal oil furnace (11) and the pipe heater (7).

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