Smoke protection device for heating unit of plastic extruder

Abstract

The utility model provides a flue gas protection device for a heating unit of a plastic extruder, and belongs to the technical field of flue gas purification. The flue gas protection device for the heating unit of the plastic extruder comprises a first purification mechanism, a second purification mechanism and a cooling mechanism, the first purification mechanism comprises a first purification box, the outer side of the first purification box is connected with a first guide pipe, a pair of fixing frames are arranged in the first purification box in a sliding mode, and the fixing frames are filled with activated carbon; the second purification mechanism comprises a second purification box, air guide pipes are installed on the sides, close to each other, of the second purification box and the first purification box, a one-way valve is connected between the air guide pipes, circulating pipes are connected to the tops of the second purification box and the first purification box, a first electromagnetic valve is connected between the circulating pipes, and the second purification box is filled with a catalyst. According to the technical scheme, high-temperature air in waste gas can be used for drying the active sleeve, and a basis is provided for regeneration of activated carbon.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas purification, in particular to a flue gas protection device for a heating unit of a plastic extruder. Background Art

[0002] Plastic extruders are generally twin-screw extruders and pelletizers, and the waste gas contains smoke, dust, VOC substances (hydrocarbon substances such as benzene, toluene, ethylbenzene, etc.) and odor. The pollution intensity of the waste gas is large, the emission volume is large, and the pollution components are complex and changeable. In particular, the odor components in the waste gas are easy to cause greater pollution to the surrounding environment and the factory environment. Therefore, protective measures should be taken against these waste gases, and the waste gas purification device plays an important role in this.

[0003] Among them, it was found through searching that the utility model patent with patent application number CN201921521337.1 discloses a fume purification device for a modified plastic extruder, including a plurality of connecting pipes, a closed collecting device, a chain-type dust collector, a composite photocatalytic device, a spray washing device, an air distribution device and an odor controller, and the closed collecting device, the chain-type dust collector, the composite photocatalytic device, the spray washing device, the air distribution device and the odor controller are connected in sequence through the connecting pipe;

[0004] When the structure is in use, the exhaust gas is controlled in a fixed area through a closed collecting device and enters the chain dust collector through a connecting pipe. The exhaust gas is filtered by the chain dust collector to remove grease and dust, and then enters the composite photocatalytic device to decompose organic matter, and then enters the spray washing device for water washing for preliminary deodorization. The exhaust gas after preliminary deodorization then enters the air distribution device and the odor controller for thorough deodorization. However, the temperature of the purified exhaust gas is relatively high, and using the spray washing device to lower the exhaust gas temperature will result in this part of the temperature being wasted. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides a fume protection device for a heating unit of a plastic extruder.

[0006] The utility model is achieved in this way:

[0007] A fume protection device for a plastic extruder heating unit comprises a first purification mechanism, a second purification mechanism and a cooling mechanism, wherein the first purification mechanism comprises a first purification box, the outer side of the first purification box is connected to a first conduit, a pair of fixed frames are slidably arranged inside the first purification box, the interior of the fixed frames is filled with activated carbon, the second purification mechanism comprises a second purification box, the second purification box and the first purification box are both provided with air guide pipes on a side close to each other, and a first one-way valve is connected between the air guide pipes, the tops of the second purification box and the first purification box are both connected to circulation pipes, a first solenoid valve is connected between the circulation pipes, and the interior of the second purification box is filled with a catalyst.

[0008] The beneficial effect of adopting the above further scheme is that the exhaust gas is purified by using activated carbon and a catalyst. The purified high-temperature gas will enter the first purification box again through the circulation pipe, thereby increasing the temperature inside the first purification box and drying the activated carbon therein. The water vapor generated by drying will carry the volatile organic matter in the activated carbon and enter the second purification box again to remove the volatile organic matter on the activated carbon, thereby laying the foundation for the regeneration of the activated carbon. This method can reuse the purified high-temperature gas, and in the subsequent regeneration process of the activated carbon, it can achieve the purpose of energy saving.

[0009] Furthermore, a second conduit is provided on the outer side of the first purification box, a fan is connected between the first conduit and the second conduit, and a flange is connected to one end of the second conduit.

[0010] Furthermore, a pair of slide grooves are provided on one side of the first purification box, and the fixed frame slides in the slide grooves. A baffle is installed on one side of the fixed frame, and a handle is installed on one side of the baffle.

[0011] Furthermore, a nickel-chromium electric furnace wire is installed at the inner bottom of the first purification box, an air inlet pipe is connected to one side of the first purification box, and a second one-way valve is connected to one end of the air inlet pipe.

[0012] The beneficial effect of adopting the above further scheme is that the nickel-chromium electric furnace wire heats the argon gas entering the first purification box through the air inlet pipe to heat the air in the activated carbon adsorption box to 800-900 degrees Celsius, causing a part of the non-volatile organic matter adsorbed on the activated carbon to boil, vaporize and desorb, and another part of the organic matter undergoes a decomposition reaction to generate small molecular hydrocarbons that are desorbed, and the residual components remain in the pores of the activated carbon to become "fixed carbon", and the desorbed small molecular hydrocarbons will enter the second purification box through the air duct and react with the catalyst therein to generate H2O and CO2, and the H2O and CO2 will flow into the first purification box through the circulation pipe to clean the activated carbon micropores and restore its adsorption performance.

[0013] Furthermore, the cooling mechanism includes a cooling box, and the cooling box and the second purification box are both equipped with air outlet pipes on the side close to each other, and a second solenoid valve is connected between the air outlet pipes, an air outlet hole is opened on the top of the cooling box, a coil is installed inside the cooling box, and the inlet of the coil is connected to the air outlet pipe, and the outlet of the coil is connected to the air outlet hole, and the interior of the cooling box is filled with cold water.

[0014] Furthermore, a water inlet is provided at the top of the cooling box, and a water inlet pipe is connected to the top of the water inlet. A water outlet is provided at the bottom of the cooling box, and a water outlet pipe is connected to the water outlet through a pump.

[0015] The beneficial effect of adopting the above further scheme is that when there is no need to regenerate the activated carbon, the purified high-temperature gas will enter the coil through the outlet pipe, and be cooled by the cold water in the cooling box, and then be discharged through the outlet hole, while the water after absorbing heat will flow out through the outlet pipe, and new cold water will be transported to the cooling box through the inlet pipe.

[0016] Furthermore, a control panel is installed on the outer side of the second purification box, and the control panel is electrically connected to the first solenoid valve, the fan, the second solenoid valve, and the pump.

[0017] The beneficial effect of the utility model is that the utility model obtains a plastic extruder heating unit smoke protection device through the above design, which utilizes activated carbon and a catalyst to purify the exhaust gas. The purified high-temperature gas will enter the first purification box again through the circulation pipe, thereby increasing the temperature in the first purification box, thereby drying the activated carbon therein. The water vapor generated by the drying will carry the volatile organic matter in the activated carbon and enter the second purification box again to remove the volatile organic matter on the activated carbon, thereby laying the foundation for the regeneration of the activated carbon. This method can reuse the purified high-temperature gas, and in the subsequent regeneration process of the activated carbon, it can achieve the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the following is a brief introduction to the drawings required for use in the implementation mode. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A first three-dimensional structural schematic diagram of a fume protection device for a heating unit of a plastic extruder provided by the utility model;

[0020] Figure 2 A second three-dimensional structural schematic diagram of a fume protection device for a heating unit of a plastic extruder provided by the utility model;

[0021] Figure 3 A third three-dimensional structural schematic diagram of a fume protection device for a heating unit of a plastic extruder provided by the utility model;

[0022] Figure 4 This is a fourth stereoscopic structural schematic diagram of a smoke protection device for a heating unit of a plastic extruder provided by the utility model.

[0023] In the figure: 100, purification mechanism; 1001, first purification box; 1002, baffle; 1003, handle; 1004, fan; 1005, first duct; 1006, flange; 1007, fixing frame; 1008, air inlet pipe; 1009, second one-way valve; 200, second purification mechanism; 2001, second purification box; 2002, circulation pipe; 2003, first solenoid valve; 2004, air guide pipe; 2005, first one-way valve; 300, cooling mechanism; 3001, cooling box; 3002, air outlet; 3003, water inlet pipe; 3004, air outlet pipe; 3005, second solenoid valve. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1 of the utility model of a smoke protection device for a heating unit of a plastic extruder

[0027] The utility model provides the following technical solutions: Figure 1-Figure 4, including a first purification mechanism 100, a second purification mechanism 200 and a cooling mechanism 300, the first purification mechanism 100 includes a first purification box 1001, the outer side of the first purification box 1001 is connected to a first conduit 1005, a pair of fixed frames 1007 are slidably arranged inside the first purification box 1001, and the interior of the fixed frame 1007 is filled with activated carbon, the second purification mechanism 200 includes a second purification box 2001, the second purification box 2001 and the first purification box 1001 are both installed with an air guide pipe 2004 on a side close to each other, and a first one-way valve 2005 is connected between the air guide pipes 2004, and the tops of the second purification box 2001 and the first purification box 1001 are both connected with a circulation pipe 2002 , a first solenoid valve 2003 is connected between the circulation pipe 2002, and the interior of the second purification box 2001 is filled with a catalyst. The activated carbon and the catalyst are used to purify the exhaust gas. The purified high-temperature gas will enter the first purification box 1001 again through the circulation pipe 2002, thereby increasing the temperature inside the first purification box 1001, thereby drying the activated carbon therein. The water vapor generated by the drying will carry the volatile organic matter in the activated carbon and enter the second purification box 2001 again to remove the volatile organic matter on the activated carbon, thereby laying the foundation for the regeneration of the activated carbon. This method can reuse the purified high-temperature gas, and in the subsequent regeneration process of the activated carbon, it can achieve the purpose of energy saving.

[0028] Embodiment 2 of the utility model of a smoke protection device for a heating unit of a plastic extruder

[0029] Reference Figure 1-Figure 4 Specifically, a nickel-chromium electric furnace wire is installed at the inner bottom of the first purification box 1001, an air inlet pipe 1008 is connected to one side of the first purification box 1001, and one end of the air inlet pipe 1008 is connected to a second one-way valve 1009. The nickel-chromium electric furnace wire heats the argon gas that enters the first purification box 1001 through the air pipe 1008 to heat the air in the activated carbon adsorption box to 800-900 degrees Celsius, so that a part of the non-volatile organic matter adsorbed on the activated carbon boils, vaporizes and desorbs, and another part of the organic matter undergoes a decomposition reaction to generate small molecular hydrocarbons that are desorbed, and the residual components remain in the pores of the activated carbon to become "fixed carbon". The desorbed small molecular hydrocarbons will enter the second purification box 2001 through the air guide pipe 2004, and react with the catalyst therein to generate H2O and CO2, and H2O and CO2 will flow into the first purification box 1001 through the circulation pipe 2002 to clean the micropores of the activated carbon and restore its adsorption performance.

[0030] Embodiment 3 of the utility model of a smoke protection device for a heating unit of a plastic extruder

[0031] Reference Figure 1-Figure 4Specifically, the cooling mechanism 300 includes a cooling box 3001, the cooling box 3001 and the second purification box 2001 are both equipped with an air outlet pipe 3004 on the side close to each other, and a second solenoid valve 3005 is connected between the air outlet pipe 3004, and an air outlet hole 3002 is opened on the top of the cooling box 3001. A coil is installed inside the cooling box 3001, and the inlet of the coil is connected to the air outlet pipe 3004, and the outlet of the coil is connected to the air outlet hole 3002. The interior of the cooling box 3001 is filled with cold water. A water inlet is provided at the top of 3001, and a water inlet pipe 3003 is connected to the top of the water inlet. A water outlet is provided at the bottom of the cooling box 3001, and a water outlet pipe is connected to the water outlet through a pump. When the activated carbon does not need to be regenerated, the purified high-temperature gas will enter the coil through the outlet pipe 3004, and be cooled by the cold water in the cooling box 3001, and then be discharged through the outlet hole 3002, and the water after absorbing heat will flow out through the outlet pipe, and new cold water will be transported to the cooling box 3001 through the inlet pipe 3003.

[0032] Specifically, the working principle of the smoke protection device for the heating unit of the plastic extruder is as follows: when in use, the flange 1006 is connected to the output pipe of the heating unit of the plastic extruder. When in normal use, the first solenoid valve 2003 needs to be closed, the second solenoid valve 3005 needs to be opened, and the fan 1004 needs to be started, so that the exhaust gas generated by the heating unit of the plastic extruder is drawn into the first purification box 1001, and the exhaust gas will then enter the second purification box 2001 through the air guide pipe 2004. After being adsorbed by the activated carbon and the catalyst, the smoke, dust, VOC substances such as benzene, toluene, ethylbenzene and other hydrocarbon substances and odor in the exhaust gas will be purified, and then enter the coil through the outlet pipe 3004, and be cooled by the cold water in the cooling box 3001, and then be discharged through the outlet hole 3002; when it is necessary to regenerate the activated carbon, the first solenoid valve 2003 is opened, and the second solenoid valve 3005 is closed, and the purified high-temperature gas will enter the first purification box 1001 again through the circulation pipe 2002 , thereby increasing the temperature in the first purification box 1001, thereby drying the activated carbon therein, and the water vapor generated by the drying will carry the volatile organic matter in the activated carbon to enter the second purification box 2001 again to remove the volatile organic matter on the activated carbon, and then the argon gas is transported to the first purification box 1001 through the air inlet pipe 1008, and the nickel-chromium electric furnace wire is started to heat the air in the activated carbon adsorption box to 800-900 degrees Celsius, so that a part of the non-volatile organic matter adsorbed on the activated carbon boils, vaporizes and desorbs, and another part of the organic matter undergoes a decomposition reaction to generate small molecular hydrocarbons that are desorbed, and the residual components remain in the pores of the activated carbon to become "fixed carbon", and the desorbed small molecular hydrocarbons will enter the second purification box 2001 through the air guide pipe 2004, and react with the catalyst therein to generate H2O and CO2, and H2O and CO2 will flow into the first purification box 1001 through the circulation pipe 2002 to clean the micropores of the activated carbon and restore its adsorption performance.

[0033] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fume protection device for a heating unit of a plastic extruder, characterized in that: The invention comprises a first purification mechanism (100), a second purification mechanism (200) and a cooling mechanism (300), wherein the first purification mechanism (100) comprises a first purification box (1001), the outer side of the first purification box (1001) is connected to a first conduit (1005), a pair of fixed frames (1007) are slidably arranged inside the first purification box (1001), and the interior of the fixed frames (1007) is filled with activated carbon, and the second purification mechanism (200) comprises a second purification box (2001) ), the second purification box (2001) and the first purification box (1001) are both installed with air ducts (2004) on the sides close to each other, and the first one-way valve (2005) is connected between the air ducts (2004), the tops of the second purification box (2001) and the first purification box (1001) are both connected with circulation pipes (2002), and the first solenoid valve (2003) is connected between the circulation pipes (2002), and the interior of the second purification box (2001) is filled with a catalyst.

2. A fume protection device for a heating unit of a plastic extruder according to claim 1, characterized in that: A second duct is provided on the outer side of the first purification box (1001), a fan (1004) is connected between the first duct (1005) and the second duct, and a flange (1006) is connected to one end of the second duct.

3. A fume protection device for a heating unit of a plastic extruder according to claim 2, characterized in that: A pair of slide grooves are provided on one side of the first purification box (1001), and the fixed frame (1007) slides in the slide grooves. A baffle (1002) is installed on one side of the fixed frame (1007), and a handle (1003) is installed on one side of the baffle (1002).

4. A fume protection device for a heating unit of a plastic extruder according to claim 3, characterized in that: A nickel-chromium electric furnace wire is installed at the inner bottom of the first purification box (1001), an air intake pipe (1008) is connected to one side of the first purification box (1001), and a second one-way valve (1009) is connected to one end of the air intake pipe (1008).

5. A fume protection device for a heating unit of a plastic extruder according to claim 4, characterized in that: The cooling mechanism (300) comprises a cooling box (3001), wherein the cooling box (3001) and the second purification box (2001) are both provided with an air outlet pipe (3004) on the side close to each other, and a second solenoid valve (3005) is connected between the air outlet pipes (3004), an air outlet hole (3002) is provided on the top of the cooling box (3001), a coil is installed inside the cooling box (3001), and the inlet of the coil is connected to the air outlet pipe (3004), and the outlet of the coil is connected to the air outlet hole (3002), and the interior of the cooling box (3001) is filled with cold water.

6. A fume protection device for a heating unit of a plastic extruder according to claim 5, characterized in that: The cooling box (3001) is provided with a water inlet at the top, and the top of the water inlet is connected to a water inlet pipe (3003). The cooling box (3001) is provided with a water outlet at the bottom, and the water outlet is connected to a water outlet pipe via a pump.

7. A fume protection device for a heating unit of a plastic extruder according to claim 6, characterized in that: A control panel is installed on the outside of the second purification box (2001), and the control panel is electrically connected to the first solenoid valve (2003), the fan (1004), the second solenoid valve (3005), and the pump.

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