Hardening furnace tail gas treatment system for resin grinding wheel production

Abstract

The utility model relates to the field of tail gas treatment equipment, in particular to a hardening furnace tail gas treatment system for resin grinding wheel production. Comprising a cooling box, a gas inlet pipe is vertically arranged at the upper end of the cooling box, the gas inlet pipe is connected with a tail gas outlet of a hardening furnace, a high-temperature-resistant induced draft fan is arranged on the gas inlet pipe, the cooling box is filled with water, a liquid inlet valve and a liquid discharge valve are arranged at the upper end and the lower end of the cooling box respectively, a gas outlet pipe is arranged at the upper end of the cooling box, and a catalyst chamber is arranged at the upper end of the gas outlet pipe. An electric heating pipe is arranged in the catalysis chamber, a power supply and a power control unit connected with the electric heating pipe are arranged outside the catalysis chamber, a catalyst is arranged in the catalysis chamber, and an exhaust pipe is arranged at the upper end of the catalysis chamber. Compared with activated carbon adsorption, the device has the advantage that the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment equipment, specifically to an exhaust gas treatment system for a hardening furnace used in the production of resin grinding wheels. Background Technology

[0002] A resin grinding wheel hardening furnace is a device used to harden resin grinding wheels. During the hardening process, the high-temperature environment causes phenolic resin to release organic compounds such as phenols, formaldehyde, and hydroxymethylphenol oligomers, and may also contain unreacted resin powder and fine particles from the grinding wheel material. To meet environmental protection requirements, it is necessary to remove dust, phenols, formaldehyde, and hydroxymethylphenol oligomers from the exhaust gas. The common method is to use activated carbon for adsorption, but activated carbon is expensive and needs to be replaced regularly. Therefore, it is necessary to design an exhaust gas treatment system for resin grinding wheel production hardening furnaces that is less expensive than activated carbon adsorption. Summary of the Invention

[0003] The purpose of this invention is to provide a hardening furnace exhaust gas treatment system for resin grinding wheel production, which has the advantage of lower cost compared to activated carbon adsorption.

[0004] The technical solution adopted is as follows:

[0005] A system for treating exhaust gas from a hardening furnace used in resin grinding wheel production includes a cooling box. An air inlet pipe is vertically installed at the top of the cooling box and connected to the exhaust gas outlet of the hardening furnace. A high-temperature resistant induced draft fan is installed on the air inlet pipe. The cooling box is filled with water. An inlet valve and a drain valve are respectively installed at the top and bottom of the cooling box. An exhaust pipe is installed at the top of the cooling box, and a catalytic chamber is installed at the top of the exhaust pipe. An electric heating element is installed inside the catalytic chamber. A power supply and power control unit connected to the electric heating element is installed outside the catalytic chamber. A catalyst is installed inside the catalytic chamber, and an exhaust pipe is installed at the top of the catalytic chamber.

[0006] Preferably, the cooling chamber is equipped with a filter cloth, which is positioned below the liquid level, and the air inlet pipe extends below the filter cloth.

[0007] Preferably, a temperature sensor is installed in the cooling box below the filter cloth, and a liquid level sensor is installed in the cooling box above the filter cloth.

[0008] Preferably, the cooling box is equipped with a water pump that is inserted below the water surface, the lower end of the water pump is higher than the filter cloth, the water pump is connected to a delivery pump, the delivery pump is equipped with a delivery pipe that extends to the top of the cooling box, a heat exchanger is provided at the upper end of the cooling box, the lower end of the heat exchanger is connected to the delivery pipe, a return water pipe is provided at the upper end of the heat exchanger, and the return water pipe is inserted downward into the cooling box.

[0009] Preferably, a cooling fan is provided on the rear side of the heat exchanger.

[0010] Preferably, the catalyst comprises Pt and Pd.

[0011] The beneficial effects are:

[0012] 1. The exhaust gas is dusted and cooled by water in the cooling box. Then, the organic matter in the exhaust gas is decomposed into water and carbon dioxide by the high temperature and catalyst in the catalytic chamber. This reduces costs compared to activated carbon, which requires regular replacement and is more expensive.

[0013] 2. The cooling fan and heat exchanger cool the water in the cooling box to prevent the water from continuously heating up to boiling and causing evaporation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a hardening furnace exhaust gas treatment system for resin grinding wheel production according to this utility model.

[0015] Figure 2 This is a front view schematic diagram of a hardening furnace exhaust gas treatment system for resin grinding wheel production according to this utility model.

[0016] Figure 3 This is a top view schematic diagram of a hardening furnace exhaust gas treatment system for resin grinding wheel production according to this utility model.

[0017] In the diagram: 1. Cooling chamber; 2. Air inlet pipe; 3. Hardening furnace; 4. Exhaust fan; 5. Filter cloth; 6. Liquid inlet valve; 7. Liquid outlet valve; 8. Temperature sensor; 9. Liquid level sensor; 10. Water pump; 11. Transfer pump; 12. Transfer pipe; 13. Heat exchanger; 14. Cooling fan; 15. Water return pipe; 16. Air outlet pipe; 17. Catalytic chamber; 18. Heating element; 19. Exhaust pipe. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments, such as... Figures 1 to 3 As shown:

[0019] Example 1: A tail gas treatment system for a hardening furnace 3 used in resin grinding wheel production includes a cooling box 1. An air inlet pipe 2 is vertically installed at the upper end of the cooling box 1. The air inlet pipe 2 is connected to the tail gas outlet of the hardening furnace 3. A high-temperature resistant induced draft fan 4 is installed on the air inlet pipe 2. The temperature of the tail gas discharged from the hardening furnace 3 is between 160°C and 300°C. The high-temperature resistant induced draft fan 4 is existing technology and will not be described in detail here. The induced draft fan 4 introduces the tail gas of the hardening furnace 3 into the cooling box 1.

[0020] The cooling box 1 is filled with water. The upper and lower ends of the cooling box 1 are respectively equipped with a liquid inlet valve 6 and a liquid outlet valve 7. The liquid inlet valve 6 is used to fill the cooling box 1 with water, and the liquid outlet valve 7 is used to discharge the water. The exhaust gas from the hardened road enters the cooling box 1 for cooling and dust removal.

[0021] The cooling chamber 1 is equipped with an exhaust pipe 16 at the top, and a catalytic chamber 17 is located at the top of the exhaust pipe 16. An electric heating tube 18 is installed inside the catalytic chamber 17. A power supply and power control unit connected to the electric heating tube 18 is installed outside the catalytic chamber 17 to control the power of the electric heating tube 18. A catalyst is installed inside the catalytic chamber 17. Under the action of high temperature and the catalyst, the organic volatiles are decomposed into water and carbon dioxide. An exhaust pipe 19 is installed at the top of the catalytic chamber 17 to discharge the decomposed gas.

[0022] Example 2: A tail gas treatment system for a hardening furnace 3 used in resin grinding wheel production includes a cooling box 1. An air inlet pipe 2 is vertically installed at the upper end of the cooling box 1. The air inlet pipe 2 is connected to the tail gas outlet of the hardening furnace 3. A high-temperature resistant induced draft fan 4 is installed on the air inlet pipe 2. The temperature of the tail gas discharged from the hardening furnace 3 is between 160°C and 300°C. The high-temperature resistant induced draft fan 4 is existing technology and will not be described in detail here. The induced draft fan 4 introduces the tail gas of the hardening furnace 3 into the cooling box 1.

[0023] The cooling chamber 1 is filled with water, and a filter cloth 5 is installed horizontally below the liquid level. The air inlet pipe 2 extends below the filter cloth 5. The upper and lower ends of the cooling chamber 1 are respectively equipped with a liquid inlet valve 6 and a liquid outlet valve 7. The liquid inlet valve 6 is used to fill the cooling chamber 1 with water, and the liquid outlet valve 7 is used to discharge water. The exhaust gas from the hardened road enters the cooling chamber 1 for cooling and dust removal. A temperature sensor 8 is installed in the cooling chamber 1 below the filter cloth 5 to monitor the water temperature in the cooling chamber 1. A liquid level sensor 9 is installed in the cooling chamber 1 above the filter cloth 5 to monitor the water level in the cooling chamber 1.

[0024] The cooling chamber 1 is equipped with a water pump 10 that is inserted below the water surface. The lower end of the water pump 10 is higher than the filter cloth 5. The water pump 10 is connected to a delivery pump 11. The delivery pump 11 is equipped with a delivery pipe 12 that extends to the top of the cooling chamber 1. A heat exchanger 13 is installed at the upper end of the cooling chamber 1. The lower end of the heat exchanger 13 is connected to the delivery pipe 12. A return water pipe 15 is installed at the upper end of the heat exchanger 13 and is inserted downward into the cooling chamber 1. A cooling fan 14 is installed at the rear of the heat exchanger 13. The cooling fan 14 blows on the heat exchanger 13 to accelerate the heat dissipation of the water inside the heat exchanger 13. A control module is installed at the upper end of the cooling chamber 1. The control module is connected to the temperature sensor 8, the delivery pump 11, and the cooling fan 14. When the temperature sensor 8 detects a temperature higher than 70°C, the control module starts the delivery pump 11 and the cooling fan 14 to dissipate heat from the water and prevent the water from boiling and evaporating.

[0025] The cooling chamber 1 is equipped with an exhaust pipe 16 at the top, and a catalytic chamber 17 is located at the top of the exhaust pipe 16. An electric heating tube 18 is installed inside the catalytic chamber 17. A power supply and power control unit connected to the electric heating tube 18 is installed outside the catalytic chamber 17 to control the power of the electric heating tube 18. A catalyst is installed inside the catalytic chamber 17. The catalyst consists of Pt and Pd. Under the action of high temperature and the catalyst, the organic volatiles are decomposed into water and carbon dioxide. An exhaust pipe 19 is installed at the top of the catalytic chamber 17 to discharge the decomposed gas.

[0026] The working principle is as follows:

[0027] The high-temperature resistant induced draft fan 4, cooling fan 14, and delivery pump 11 are started to introduce the exhaust gas from the hardened road into the cooling box 1. The water in the cooling box 1 cools the exhaust gas and removes dust from the water. Then the gas rises and enters the catalytic chamber 17 from the exhaust pipe 16. Under the action of high temperature and catalyst, the volatile organic compounds are decomposed into water and carbon dioxide and discharged from the exhaust pipe 19. As the exhaust gas treatment increases, the water temperature in the cooling box 1 rises. When the temperature sensor 8 detects that the temperature is higher than 70°C, the control module starts the delivery pump 11 and cooling fan 14 to cool the water and prevent the water from boiling and evaporating.

[0028] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A tail gas treatment system for a hardening furnace (3) used in the production of resin grinding wheels, characterized in that: The cooling chamber (1) includes a cooling box (1), an air inlet pipe (2) is vertically installed at the top of the cooling box (1), the air inlet pipe (2) is connected to the exhaust gas outlet of the hardening furnace (3), a high-temperature resistant induced draft fan (4) is installed on the air inlet pipe (2), water is filled in the cooling box (1), an inlet valve (6) and an outlet valve (7) are respectively installed at the top and bottom of the cooling box (1), an outlet pipe (16) is installed at the top of the cooling box (1), a catalytic chamber (17) is installed at the top of the outlet pipe (16), an electric heating tube (18) is installed in the catalytic chamber (17), a power supply and power control unit connected to the electric heating tube (18) is installed outside the catalytic chamber (17), a catalyst is installed in the catalytic chamber (17), and an exhaust pipe (19) is installed at the top of the catalytic chamber (17).

2. The exhaust gas treatment system for a hardening furnace (3) used in resin grinding wheel production as described in claim 1, characterized in that: The cooling box (1) is equipped with a filter cloth (5), which is positioned below the liquid surface, and the air inlet pipe (2) extends to the bottom of the filter cloth (5).

3. The exhaust gas treatment system for a hardening furnace (3) used in resin grinding wheel production as described in claim 2, characterized in that: A temperature sensor (8) is installed in the cooling box (1) below the filter cloth (5), and a liquid level sensor (9) is installed in the cooling box (1) above the filter cloth (5).

4. The exhaust gas treatment system for a hardening furnace (3) used in resin grinding wheel production as described in claim 3, characterized in that: The cooling box (1) is equipped with a water pump (10) that is inserted below the water surface. The lower end of the water pump (10) is higher than the filter cloth (5). The water pump (10) is connected to a delivery pump (11). The delivery pump (11) is equipped with a delivery pipe (12) that extends to the top of the cooling box (1). A heat exchanger (13) is provided at the upper end of the cooling box (1). The lower end of the heat exchanger (13) is connected to the delivery pipe (12). A return water pipe (15) is provided at the upper end of the heat exchanger (13). The return water pipe (15) is inserted downward into the cooling box (1).

5. The exhaust gas treatment system for a hardening furnace (3) used in resin grinding wheel production as described in claim 4, characterized in that: A cooling fan (14) is provided on the rear side of the heat exchanger (13).

6. The exhaust gas treatment system for a hardening furnace (3) used in resin grinding wheel production as described in claim 1, characterized in that: The catalyst comprises Pt and Pd.

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