Waste gas recovery device for gas-fired boiler of plastic film production line

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a waste gas recovery device for a gas-fired boiler of a plastic film production line, which is used for treating harmful substances in flue gas, inputting heated water into the boiler again to be utilized or used for other purposes, and improving the utilization rate of heat. Comprising a recycling box, a plurality of partition plates are evenly and alternately installed at the upper end and the lower end in the recycling box, a gas conveying channel is formed in the recycling box, cavities are formed in the partition plates, a plurality of heat exchange fin plates are installed at the left end and the right end of each partition plate, and a water injection assembly communicating with the interiors of the cavities of the partition plates is installed at the top of the recycling box; an output assembly communicating with the lower portion of the partition plate cavity is installed at the front end of the recycling box, an input assembly is connected to the upper portion of the left side wall of the recycling box, and a discharge pipe is connected to the right end of the top of the recycling box.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a waste gas recovery device for a gas boiler of a plastic film production line. Background Art

[0002] Boiler is an energy conversion device. Boiler plays different roles in all walks of life now. The energy input to the boiler includes chemical energy and electrical energy in the fuel. The boiler outputs steam, high-temperature water or organic heat carrier with certain thermal energy. A gas boiler with waste heat recovery proposed by prior art publication number CN216047576U includes a gas boiler body, a steam outlet, a support foot and a water inlet. The lower right end of the gas boiler body is connected to the support foot, and the bottom of the support foot is equipped with a universal wheel. The upper left end of the gas boiler body is provided with a steam outlet, and the lower left end of the gas boiler body is provided with a water inlet. The gas boiler body is provided with an isolation plate inside. When the water in the boiler is heated by gas, the temperature in the combustion chamber is increased by the combustion of the burner to achieve the heating of the water. However, in the process of gas combustion, more waste flue gas will be generated. These waste flue gases will have a lot of heat. If they are discharged directly, it will cause a waste of energy and reduce the utilization rate of energy. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a waste gas recovery device for a gas boiler of a plastic film production line, which can process harmful substances in flue gas and input the heated water energy back into the boiler for utilization or other uses, thereby improving the utilization rate of heat.

[0004] The utility model discloses a waste gas recovery device for a gas boiler of a plastic film production line, comprising a recovery box, wherein a plurality of partitions are evenly and alternately installed at the upper and lower ends of the interior of the recovery box, so that an air transmission channel is formed inside the recovery box, the interior of the partition is set as a cavity, and a plurality of heat exchange fins are installed at the left and right ends of the partition, a water injection component connected with the interior of the partition cavity is installed on the top of the recovery box, an output component connected with the lower part of the partition cavity is installed at the front end of the recovery box, an input component is connected with the upper part of the left side wall of the recovery box, and an exhaust pipe is connected with the top right end of the recovery box; smoke enters the input component, harmful substances in the smoke are processed, and then the smoke is input into the recovery box, flows in the air transmission channel, increases the flow distance of the smoke in the recovery box, injects water into the partition cavity through the water injection component, heats the water through the heat of the smoke, increases the contact area between the partition and the smoke through the heat exchange fin, improves the utilization rate of heat, and the heated water energy is input into the boiler again through the output component to be used or used for other purposes, thereby increasing the heat energy recovery rate.

[0005] Preferably, the water injection assembly includes a water tank, a water adding pipe, a water extraction pipe, a water pump, a water distribution pipe, multiple water injection pipes and multiple control valves. The water tank is fixedly connected to the bottom end of the recovery tank, the front upper part of the water tank is connected to the water adding pipe, the input end of the water extraction pipe is connected to the inner bottom end of the water tank, the output end of the water extraction pipe is connected to the input end of the water pump, the water pump is fixedly installed on the top of the recovery tank, the output end of the water pump is connected to the water distribution pipe, the lower part of the water distribution pipe is connected to multiple water injection pipes, the output end of the water injection pipe is connected to the cavity of the partition, and the control valve is installed on the water injection pipe; water is added to the water tank through the water adding pipe, the water pump is started to extract water from the water tank through the water extraction pipe, and then input it into the water distribution pipe, the control valve is opened to allow water to be input into the cavity of the partition through the water injection pipe, the water is heated by the heat of the flue gas, and the heat recovery rate of heat energy is improved.

[0006] Preferably, the output component includes multiple temperature sensors, multiple water outlet pipes, a water collecting pipe and a water supply pump. The temperature sensors are fixedly mounted on the rear side wall of the recovery box. The detection ends of the temperature sensors are respectively located in the cavities of the partitions. The input ends of the water outlet pipes are respectively connected to the inside of the bottom ends of the partitions, the output ends of the water outlet pipes are connected to the water collecting pipes, and the output ends of the water collecting pipes are connected to the output ends of the water supply pumps. The temperature of the water inside the partition is detected by the temperature sensor, the water supply pump is started, and the hot water inside the partition is extracted through the water collecting pipes and the water outlet pipes. The heated water energy is input into the boiler again for use or other purposes, thereby increasing the heat energy recovery rate.

[0007] Preferably, the input component includes a treatment box, an exhaust pump, a filter and a sealing door. The treatment box is fixedly connected to the left side wall of the recovery box, an exhaust gas purification catalyst is arranged inside the treatment box, an exhaust pump is installed on the left side wall of the treatment box, the output end of the exhaust pump is connected with the interior of the treatment box, an air inlet pipe is arranged at the input end of the exhaust pump, the sealing door and the sealing cover are installed on the top of the treatment box, the filter is fixedly installed at the inner upper end of the treatment box, and air inlets are opened on the right side wall of the treatment box and the upper part of the left side wall of the recovery box; the exhaust pump is started to extract the flue gas and input it into the treatment box to treat harmful substances in the exhaust gas, and the treated flue gas extends into the interior of the recovery box through the air inlet to avoid direct discharge of flue gas and cause environmental pollution.

[0008] Preferably, a driving motor is fixedly installed at the bottom of the processing box, and a rotating shaft is connected to the output end of the driving motor. The rotating shaft is rotatably installed inside the processing box, and a plurality of stirring blades are evenly installed on the outer wall of the rotating shaft. A supply fan blade is installed on the top of the rotating shaft through the filter screen; the driving motor is started to drive the rotating shaft to rotate, and the rotating shaft drives the stirring blade to rotate, thereby stirring the exhaust gas purification catalyst to ensure the contact between the flue gas and the exhaust gas purification catalyst and the treatment effect. While the rotating shaft rotates, it drives the supply fan blades to rotate to transport the flue gas to the air inlet, thereby improving the air intake efficiency.

[0009] Preferably, an insertion port is opened on the upper part of the right side wall of the recovery box, and a sealing plate is sealingly inserted at the insertion port. An activated carbon plate is installed on the sealing plate, and the activated carbon plate is located below the input end of the exhaust pipe; the output flue gas is adsorbed again by the activated carbon plate on the harmful gas in the exhaust gas, which fully ensures the treatment effect of the exhaust gas and reduces the pollution of the atmosphere to the environment.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the flue gas enters the input component, harmful substances in the flue gas are processed, and then the flue gas is input into the recovery box and flows in the gas transmission channel, thereby increasing the flow distance of the flue gas in the recovery box, and water is injected into the partition cavity through the water injection component, and the water is heated by the heat of the flue gas. The contact area between the partition and the flue gas is increased through the heat exchange fins, thereby improving the utilization rate of heat, and the heated water energy is input into the boiler again through the output component for use or other purposes, thereby increasing the heat energy recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a schematic diagram of the axonometric structure of the utility model;

[0013] Figure 3 It is a schematic diagram of the structure of the utility model viewed from above;

[0014] Figure 4 It is a schematic diagram of the internal structure of the utility model;

[0015] Figure 5 It is a front cross-sectional structural schematic diagram of the utility model;

[0016] Figure 6 A schematic diagram of the cross-sectional structure of the utility model from the left side;

[0017] Markings in the attached figure: 1. Recovery box; 2. Partition; 3. Heat exchange fin plate; 4. Water tank; 5. Water filling pipe; 6. Suction pipe; 7. Suction pump; 8. Water distribution pipe; 9. Water injection pipe; 10. Control valve; 11. Discharge pipe; 12. Temperature sensor; 13. Water outlet pipe; 14. Water collecting pipe; 15. Water supply pump; 16. Activated carbon plate; 17. Sealing plate; 18. Treatment box; 19. Suction pump; 20. Filter; 21. Sealing door; 22. Inlet pipe; 23. Drive motor; 24. Rotating shaft; 25. Stirring blade; 26. Fan blade. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive. Example

[0019] like Figures 2 to 6 As shown, multiple partitions 2 are evenly and alternately installed at the upper and lower ends of the interior of the recovery box 1, so that an air transmission channel is formed inside the recovery box 1, the interior of the partition 2 is set as a cavity, and multiple heat exchange fins 3 are installed at the left and right ends of the partition 2. The top right end of the recovery box 1 is connected to a discharge pipe 11, the water tank 4 is fixedly connected to the bottom end of the recovery box 1, and the front upper part of the water tank 4 is connected to a water supply pipe 5. The input end of the water pumping pipe 6 is connected to the bottom end of the water tank 4, and the output end of the water pumping pipe 6 is connected to the input end of the water pump 7. The water pump 7 is fixedly installed on the top of the recovery box 1, and the output end of the water pump 7 is connected to a water distribution pipe 8, and the lower part of the water distribution pipe 8 is connected to multiple water injection pipes 9, the output end of the water injection pipe 9 is connected to the cavity of the partition 2, a control valve 10 is installed on the water injection pipe 9, a temperature sensor 12 is fixedly installed on the rear side wall of the recovery box 1, and the detection ends of the temperature sensor 12 are respectively located in the cavity of the partition 2, the input ends of the water outlet pipe 13 are respectively connected to the bottom of the partition 2, the output end of the water outlet pipe 13 is connected to the water collecting pipe 14, and the output end of the water collecting pipe 14 is connected to the output end of the upper water pump 15. The upper part of the right side wall of the recovery box 1 is provided with an insertion port, and a sealing plate 17 is sealed and inserted at the insertion port. An activated carbon plate 16 is installed on the sealing plate 17, and the activated carbon plate 16 is located below the input end of the discharge pipe 11;

[0020] The flue gas is input into the recovery box 1 and flows in the gas transmission channel, thereby increasing the flow distance of the flue gas in the recovery box 1. The contact area between the partition 2 and the flue gas is increased through the heat exchange fin plate 3, thereby improving the utilization rate of heat. Water is added to the water tank 4 through the water adding pipe 5, and the water pump 7 is started to extract the water in the water tank 4 through the water pumping pipe 6, and then input into the water distribution pipe 8. The control valve 10 is opened to allow the water to be input into the cavity of the partition 2 through the water injection pipe 9. The water is heated by the heat of the flue gas to improve the heat energy recovery rate. The temperature of the water inside the partition 2 is detected by the temperature sensor 12, and the water supply pump 15 is started. The hot water inside the partition 2 is extracted through the water collecting pipe 14 and the water outlet pipe 13, and the heated water can be input into the boiler again for use or other purposes, thereby increasing the heat energy recovery rate. The output flue gas is used to adsorb harmful gases in the exhaust gas again through the activated carbon plate 16, thereby fully ensuring the treatment effect of the exhaust gas and reducing the pollution of the atmosphere to the environment. Example

[0021] like Figure 1 , Figure 4 and Figure 5 As shown, on the basis of Example 1, it also includes a treatment box 18 fixedly connected to the left side wall of the recovery box 1, an exhaust gas purification catalyst is arranged inside the treatment box 18, an air pump 19 is installed on the left side wall of the treatment box 18, the output end of the air pump 19 is connected to the inside of the treatment box 18, an air intake pipe 22 is arranged at the input end of the air pump 19, a sealing door 21 and a sealing cover are installed on the top of the treatment box 18, a filter 20 is fixedly installed at the upper end of the inside of the treatment box 18, an air intake port is opened on the right side wall of the treatment box 18 and the upper part of the left side wall of the recovery box 1, a driving motor 23 is fixedly installed at the bottom of the treatment box 18, a rotating shaft 24 is connected to the output end of the driving motor 23, and the rotating shaft 24 is rotatably installed inside the treatment box 18, a plurality of stirring blades 25 are evenly installed on the outer wall of the rotating shaft 24, and a fan blade 26 is installed on the top of the rotating shaft 24 through the filter 20;

[0022] Start the vacuum pump 19 to extract the flue gas and input it into the treatment box 18 to treat the harmful substances in the exhaust gas. The treated flue gas extends into the recovery box 1 through the air inlet to avoid direct discharge of flue gas to cause environmental pollution. Start the drive motor 23 to drive the rotating shaft 24 to rotate, and the rotating shaft 24 drives the stirring blades 25 to rotate to stir the exhaust gas purification catalyst to ensure the contact between the flue gas and the exhaust gas purification catalyst and the treatment effect. The rotating shaft 24 rotates and drives the fan blades 26 to rotate to transport the flue gas to the air inlet, thereby improving the air intake efficiency.

[0023] like Figures 1 to 6 As shown, the utility model is a waste gas recovery device for a gas boiler in a plastic film production line. When it is working, the vacuum pump 19 is started to extract the flue gas and input it into the treatment box 18 to treat the harmful substances in the waste gas. The driving motor 23 is started to drive the rotating shaft 24 to rotate, and the rotating shaft 24 drives the stirring blade 25 to rotate to stir the exhaust gas purification catalyst to ensure the contact between the flue gas and the exhaust gas purification catalyst and the treatment effect. The rotating shaft 24 rotates and drives the fan blade 26 to rotate to transport the flue gas to the air inlet. The flue gas is input into the recovery box 1 and flows in the gas transmission channel. Water is added to the water tank 4 through the water adding pipe 5. The water pump 7 is started to pump water through the water tank 4. The water pipe 6 extracts water from the water tank 4 and then inputs it into the water distribution pipe 8. The control valve 10 is opened to allow water to be input into the cavity of the partition 2 through the water injection pipe 9. The water is heated by the heat of the flue gas. The contact area between the partition 2 and the flue gas is increased by the heat exchange fin plate 3. The output flue gas is used to adsorb harmful gases in the exhaust gas again through the activated carbon plate 16, which fully guarantees the treatment effect of the exhaust gas. The temperature of the water inside the partition 2 is detected by the temperature sensor 12, and the water supply pump 15 is started. The hot water inside the partition 2 is extracted through the water collecting pipe 14 and the water outlet pipe 13, and the heated water can be input into the boiler again for use or other purposes.

[0024] The water pump 7, temperature sensor 12, water supply pump 15, air pump 19 and drive motor 23 of the waste gas recovery device of the gas boiler of a plastic film production line of the utility model are purchased on the market. The technicians in this industry only need to install and operate them according to the accompanying instruction manual, without the need for the technicians in this field to make creative labor.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A waste gas recovery device for a gas boiler in a plastic film production line, characterized in that: The invention comprises a recovery box (1), wherein a plurality of partitions (2) are evenly and alternately installed at the upper and lower ends of the recovery box (1), so that a gas transmission channel is formed inside the recovery box (1), the interior of the partition (2) is arranged as a cavity, a plurality of heat exchange fins (3) are installed at the left and right ends of the partition (2), a water injection component connected to the interior of the cavity of the partition (2) is installed at the top of the recovery box (1), an output component connected to the lower part of the cavity of the partition (2) is installed at the front end of the recovery box (1), an input component is connected to the upper part of the left side wall of the recovery box (1), and a discharge pipe (11) is connected to the right end of the top of the recovery box (1).

2. A waste gas recovery device for a gas boiler in a plastic film production line as claimed in claim 1, characterized in that: The water injection assembly comprises a water tank (4), a water supply pipe (5), a water extraction pipe (6), a water pump (7), a water distribution pipe (8), a plurality of water injection pipes (9) and a plurality of control valves (10). The water tank (4) is fixedly connected to the bottom end of the recovery tank (1). The upper front end of the water tank (4) is connected to the water supply pipe (5). The input end of the water extraction pipe (6) is connected to the inner bottom end of the water tank (4). The output end of the water extraction pipe (6) is connected to the input end of the water extraction pump (7). The water extraction pump (7) is fixedly installed on the top of the recovery tank (1). The output end of the water extraction pump (7) is connected to the water distribution pipe (8). The lower part of the water distribution pipe (8) is connected to a plurality of water injection pipes (9). The output end of the water injection pipe (9) is connected to the cavity of the partition (2). The control valve (10) is installed on the water injection pipe (9).

3. The waste gas recovery device for a gas boiler of a plastic film production line according to claim 1, characterized in that: The output assembly comprises a plurality of temperature sensors (12), a plurality of water outlet pipes (13), a water collecting pipe (14) and a water supply pump (15). The temperature sensors (12) are fixedly mounted on the rear side wall of the recovery box (1). The detection ends of the temperature sensors (12) are respectively located in the cavities of the partitions (2). The input ends of the water outlet pipes (13) are respectively connected to the inside of the bottom end of the partitions (2). The output ends of the water outlet pipes (13) are connected to the water collecting pipes (14). The output ends of the water collecting pipes (14) are connected to the output ends of the water supply pump (15).

4. The waste gas recovery device for a gas boiler of a plastic film production line according to claim 1, characterized in that: The input assembly comprises a processing box (18), an air extraction pump (19), a filter screen (20) and a sealing door (21); the processing box (18) is fixedly connected to the left side wall of the recovery box (1); an exhaust gas purification catalyst is arranged inside the processing box (18); an air extraction pump (19) is installed on the left side wall of the processing box (18); the output end of the air extraction pump (19) is connected to the inside of the processing box (18); an air intake pipe (22) is arranged at the input end of the air extraction pump (19); a sealing cover of the sealing door (21) is installed on the top of the processing box (18); the filter screen (20) is fixedly installed at the upper end of the processing box (18); and air intake ports are opened on the right side wall of the processing box (18) and the upper part of the left side wall of the recovery box (1).

5. A waste gas recovery device for a gas boiler in a plastic film production line as claimed in claim 4, characterized in that: A driving motor (23) is fixedly mounted on the bottom of the processing box (18); an output end of the driving motor (23) is connected to a rotating shaft (24); the rotating shaft (24) is rotatably mounted inside the processing box (18); a plurality of stirring blades (25) are evenly mounted on the outer wall of the rotating shaft (24); and a supply fan blade (26) is mounted on the top end of the rotating shaft (24) through the filter screen (20).

6. The waste gas recovery device for a gas boiler in a plastic film production line according to claim 1, characterized in that: The upper portion of the right side wall of the recovery box (1) is provided with an insertion opening, a sealing plate (17) is sealingly inserted at the insertion opening, an activated carbon plate (16) is mounted on the sealing plate (17), and the activated carbon plate (16) is located below the input end of the discharge pipe (11).

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