Novel NMP-containing waste gas and waste heat recovery device
By designing an NMP exhaust gas and waste heat recovery device with a regulating pipe, sealing ring, and air-blocking block structure, the problem of production disruption caused by disassembling the coating machine oven filter was solved. This allows for filter replacement without machine shutdown, reducing energy consumption and improving production efficiency.
Patent Information
- Application Number
- CN202423247114.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In existing technologies, disassembling and cleaning the filter of the coating machine oven can affect exhaust gas purification and waste heat recovery, leading to production shutdowns and impacting production efficiency.
A novel NMP-containing waste gas and waste heat recovery device was designed. It adopts a structure of regulating pipe, sealing ring and gas blocking block, so that the clean filter can be replaced without stopping the waste gas extraction. The direction of the gas blocking block is restricted by sliding rod and interception rod to ensure that the inside of the pipe is blocked or open. Combined with the first and fourth stage heat exchangers, the wind resistance is reduced. Activated carbon adsorption mesh and filter screen are used for filtration.
It enables the replacement of clean filters without shutting down the system, ensuring the effectiveness of exhaust gas purification and waste heat recovery, reducing fan power and energy consumption, simplifying system layout, and improving production continuity and efficiency.
Smart Images
Figure CN223726923U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of NMP waste gas and waste heat recovery technology, specifically relating to a novel NMP-containing waste gas and waste heat recovery device. Background Technology
[0002] In lithium battery production, a device called a coating machine is required. This machine coats the electrode materials of the battery with a mixture dissolved in certain solvents through a die head and a die tail. After drying in the coating machine's oven, the coating material is then sent to subsequent processes. Typically, the organic solvent used in positive electrode coating machines is NMP, while water is used in negative electrode coating machines.
[0003] During the drying process in the coating machine oven, the positive electrode solvent NMP will turn into gas and be discharged into the external NMP recovery tank. The filter in the NMP recovery tank filters the NMP-containing waste gas and then guides it to the heat exchanger for heat recovery.
[0004] To ensure the filtration effect of the filter, the extraction of exhaust gas from the coating machine oven is usually stopped, and the filter is disassembled and cleaned. However, disassembling and cleaning the filter can easily affect the purification of exhaust gas and the recovery of waste heat in the coating machine oven. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a novel NMP-containing waste gas and waste heat recovery device.
[0006] To achieve the above objectives, this utility model provides a novel NMP-containing waste gas and waste heat recovery device, including a heat exchange tank. One end of the heat exchange tank is connected to a return air fan, and the other end of the heat exchange tank is equipped with a filter mechanism and an exhaust fan. An adjustment mechanism is also provided, including an adjustment pipe connected to one end of the exhaust fan. Two sealing rings are fixedly connected to the inner wall of the adjustment pipe. An air-blocking block is rotatably connected to the inner wall of the sealing ring. A solid iron rod is slidably connected to the upper end of the inner wall of the air-blocking block. Two positioning rings are fixedly connected to the upper surface of the adjustment pipe. The lower end of the solid iron rod is engaged with the inner wall of the positioning ring. The overall shape of the adjustment pipe is "U".
[0007] In the above technical solution, a sliding rod is fixedly connected to the upper surface of the air-blocking block, and a plurality of intercepting rods are provided on the upper surface of the regulating tube.
[0008] In the above technical solution, a spring is further fixedly connected to the end of the solid iron rod, and the top end of the spring is fixedly connected to the inner top wall of the air-blocking block.
[0009] In the above technical solution, a magnet is further embedded at the top of the air-blocking block, and the surface of the solid iron rod penetrates and is magnetically attracted to the surface of the magnet.
[0010] In the above technical scheme, further, the filtering mechanism comprises a first sealing shell communicated with one end of the heat exchange tank, one end of the adjusting pipe is communicated with the first sealing shell, a second sealing shell is arranged on the top of the first sealing shell, and a filter screen and an activated carbon adsorption screen are arranged on the inner wall of the first sealing shell.
[0011] In the above technical scheme, further, the inner wall of the first sealing shell is fixedly connected with a plurality of limiting rods.
[0012] In the above technical scheme, further, the inner wall of the second sealing shell is threadedly connected with a bolt, and the surface of the bolt is threadedly connected to the inner wall of the first sealing shell.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] By adjusting the pipe, the sealing ring and the air resistance block, the two sides of the inner wall of the adjusting pipe are adjusted, one side of the inner wall of the adjusting pipe is open, and the other side of the inner wall is blocked, compared with the existing cleaning filtering mechanism, the waste gas extraction operation in the coating machine oven needs to be stopped, and the cleaning filtering mechanism can be replaced without closing the waste gas extraction operation in the coating machine oven, so that the purification and waste heat recovery effect of the waste gas and waste heat recovery device on the waste gas in the coating machine oven are ensured.
[0015] By the sliding rod and the intercepting rod, the rotating direction of the air resistance block is limited, the adjusting pipe is fully blocked or fully open, and the iron rod is accurately clamped in the positioning ring. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The utility model provides an overall structure schematic view;
[0017] Figure 2 The utility model provides a heat exchange tank sectional view;
[0018] Figure 3 The utility model provides a filtering mechanism and adjusting mechanism structure schematic view;
[0019] Figure 4 The utility model discloses a heat exchange tank and filtering mechanism and adjusting mechanism structure schematic view; Figure 3 The utility model discloses a heat exchange tank and filtering mechanism and adjusting mechanism structure schematic view;
[0020] In the figure: 1, heat exchange tank, 2, return fan, 3, exhaust fan, 4, filtering mechanism, 41, first sealing shell, 42, second sealing shell, 43, bolt, 44, filter screen, 45, activated carbon adsorption screen, 46, limiting rod, 5, adjusting mechanism, 51, adjusting pipe, 52, sealing ring, 53, air resistance block, 54, iron rod, 55, spring, 56, magnet, 57, sliding rod, 58, intercepting rod, 59, positioning ring. Detailed Implementation
[0021] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0022] like Figures 1-4 The present invention discloses a novel NMP-containing waste gas and waste heat recovery device, comprising a heat exchange tank 1, one end of which is connected to a return air fan 2, and the other end of which is provided with a filter mechanism 4 and an exhaust fan 3, and an adjustment mechanism 5. The adjustment mechanism 5 includes an adjustment pipe 51 connected to one end of the exhaust fan 3. Two sealing rings 52 are fixedly connected to the inner wall of the adjustment pipe 51. An air blocking block 53 is rotatably connected to the inner wall of the sealing ring 52. A solid iron rod 54 is slidably connected to the upper end of the inner wall of the air blocking block 53. Two positioning rings 59 are fixedly connected to the upper surface of the adjustment pipe 51. The lower end of the surface of the solid iron rod 54 is engaged with the inner wall of the positioning ring 59. The adjustment pipe 51 is U-shaped in general.
[0023] The heat exchange tank 1 is equipped with a primary surface cooler, a secondary surface cooler, a tertiary surface cooler, and a quaternary heat exchanger.
[0024] In this embodiment of the invention, one end of the exhaust fan 3 is threadedly connected to the air outlet pipe of the coating machine oven, and the other end is threadedly connected to the air inlet pipe of the coating machine oven. At this time, the first-stage, second-stage, third-stage, and fourth-stage surface coolers in the heat exchange tank 1 are threadedly connected to their respective water pipes. After all connections are completed, during operation of the coating machine oven, the exhaust fan 3 and return fan 2 are manually turned on. The exhaust fan 3 extracts the high-temperature exhaust gas containing NMP generated during the coating machine oven's processing. The temperature of the high-temperature exhaust gas is between 110℃ and 130℃. It is then transported to the filter mechanism 4 through the regulating pipe 51. The filter mechanism 4 filters the high-temperature exhaust gas containing NMP and then transports it to the heat exchange tank 1, where it passes through the first-stage surface cooler and is cooled to approximately 50℃ after heat exchange. This equipment can recover the heat energy from the exhaust gas. The heat exchange medium is usually water or other harmless solvents. The temperature of the heat exchange medium will rise from room temperature to approximately 120℃.
[0025] The cooled gas enters a second surface cooler to be cooled to below 40 DEG C, usually using cooling water. The gas cooled to 40 DEG C enters a third surface cooler to be cooled to about 16 DEG C, usually using chilled water. During the second and third surface cooling, NMP and water are condensed and separated. About 90-98 vol% of the gas cooled to 14-16 DEG C is introduced into a fourth heat exchanger to be heated to 70 DEG C-90 DEG C. The heated gas is returned to the coating oven by a return fan 2 for recycling. The heat exchanger medium of the fourth heat exchanger is water cooled by the first heat exchanger to about room temperature, and is then pumped to the first heat exchanger by a circulating pump to complete the heat recycling process. About 2-10 vol% of the gas cooled to 16 DEG C is sent to a rotary drum or a water scrubber for treatment, and the NMP concentration in the exhaust gas is reduced to 20-30 ppm, meeting the organic exhaust emission standard.
[0026] The present method uses a first surface cooler and a fourth heat exchanger to replace the conventional gas-gas heat exchanger, which can effectively reduce the air resistance under large exhaust air volume, thereby reducing the power of the exhaust fan 3 and the return fan 2, and the energy consumption is 10-30% lower than that of the traditional method.
[0027] By adjusting the heat exchange capacity of the heat exchanger, the temperature of the exhaust air returned to the coating machine can be adjusted, thereby realizing stable drying operation of the coating machine.
[0028] The present method has only three devices: the exhaust fan 3, the heat exchanger tank 1, and the return fan 2, so that the entire system is very simple.
[0029] After using the process, the fan power is usually selected to be 45kw. However, the conventional process needs to select 55kw. This is because the first heat exchanger and the fourth heat exchanger play the role of the original gas-gas heat exchanger, and the air duct resistance is reduced by about 1200pa. Thus, 40kw of power consumption can be saved per hour.
[0030] In the embodiment of the utility model, when the filter mechanism 4 needs to be disassembled and cleaned, the solid iron rod 54 on the filter mechanism 4 to be used is pulled up to move away from the positioning ring 59, at this time the air resistance block 53 is rotated to open one end of the inner wall of the adjusting pipe 51, at this time the solid iron rod 54 is pushed down to be clamped into the positioning ring 59, so that the exhaust gas flows to the filter mechanism 4 to be used, the solid iron rod 54 on the filter mechanism 4 to be disassembled and cleaned is pulled up to move away from the positioning ring 59, at this time the air resistance block 53 is rotated to block one end of the inner wall of the adjusting pipe 51, at this time the solid iron rod 54 is pushed down to be clamped into the positioning ring 59, so that the exhaust gas is blocked from flowing to the filter mechanism 4 to be disassembled.
[0031] In the embodiment of the utility model, through adjusting pipe 51, sealing ring 52 and air resistance block 53, adjusting pipe 51 inner wall both sides are adjusted, and then one side of adjusting pipe 51 inner wall is open, and the other side of adjusting pipe 51 inner wall is blocked, compared with the prior art, the cleaning filter mechanism 4 needs to stop the extraction operation of the waste gas in the coating machine oven, and the effect of the waste gas and waste heat recovery device on the purification and waste heat recovery of the waste gas in the coating machine oven is ensured.
[0032] In some embodiments, as shown in Figure 4 As a preferred embodiment of the utility model, the surface upper end of the air resistance block 53 is fixedly connected with a slide rod 57, the surface upper end of the adjusting pipe 51 is provided with a plurality of intercepting rods 58, the end of the solid iron rod 54 is fixedly connected with a spring 55, the top end of the spring 55 is fixedly connected to the inner top wall of the air resistance block 53, the top end of the air resistance block 53 is embeddedly installed with a magnetic attraction 56, and the surface of the solid iron rod 54 penetrates and is magnetically attracted to the surface of the magnetic attraction 56.
[0033] In the embodiment of the utility model, the air resistance block 53 drives the slide rod 57 to move in a ring shape, the slide rod 57 abuts against one of the intercepting rods 58, the rotation of the air resistance block 53 is stopped, one side of the inner wall of the adjusting pipe 51 is open or blocked, at this time, the elastic force of the spring 55 pushes the solid iron rod 54 to move downward and be accurately clamped in the positioning ring 59, and the air resistance block 53 is locked.
[0034] In the embodiment of the utility model, the slide rod 57 and the intercepting rod 58 limit the rotation direction of the air resistance block 53, ensure that the adjusting pipe 51 is completely blocked or completely open, and ensure that the solid iron rod 54 is accurately clamped in the positioning ring 59.
[0035] In some embodiments, as shown in Figure 3 As a preferred embodiment of the utility model, the filter mechanism 4 comprises a first sealing shell 41 communicated with one end of the heat exchange tank 1, one end of the adjusting pipe 51 is communicated with the first sealing shell 41, the top of the first sealing shell 41 is provided with a second sealing shell 42, the inner wall of the first sealing shell 41 is provided with a filter screen 44 and an activated carbon adsorption screen 45, the inner wall of the first sealing shell 41 is fixedly connected with a plurality of limiting rods 46, the inner wall of the second sealing shell 42 is threadedly connected with a bolt 43, and the surface of the bolt 43 is threadedly connected to the inner wall of the first sealing shell 41.
[0036] In the embodiment of the utility model, through electric wrench rotation corresponding bolt 43, make bolt 43 away from first sealed shell 41, further release first sealed shell 41 and the locking of second sealed shell 42, pull second sealed shell 42 at this moment, make first sealed shell 41 open, pull filter screen 44 and active carbon adsorption screen 45 respectively, can clean it, after cleaning, under the action of spacing rod 46 make filter screen 44 and active carbon adsorption screen 45 accurate installation in first sealed shell 41, rotation bolt 43, make second sealed shell 42 and first sealed shell 41 lock.
[0037] Need to explain, the above-mentioned heat exchange tank 1, primary surface cooler, secondary surface cooler, tertiary surface cooler, four-stage heat exchanger, return air fan 2, exhaust fan 3, first sealed shell 41, second sealed shell 42, bolt 43, filter screen 44, active carbon adsorption screen 45, sealing ring 52, magnet 56 etc. are all relatively mature devices in prior art application, and specific model can be selected according to actual needs, and meanwhile heat exchange tank 1, primary surface cooler, secondary surface cooler, tertiary surface cooler, four-stage heat exchanger, return air fan 2 and exhaust fan 3 power supply can be built-in power supply or mains power supply, and specific power supply mode is selected as the case may be, and will not be repeated here.
[0038] The above shows and describes the basic principle, main features and advantages of the utility model. The skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and description in the specification are only the principle of the utility model, and the utility model will have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.
Claims
1. A novel NMP-containing waste gas and waste heat recovery device, comprising a heat exchange tank (1), one end of the heat exchange tank (1) is communicated with a return fan (2), the other end of the heat exchange tank (1) is provided with a filtering mechanism (4) and an exhaust fan (3), characterized in that, an adjusting mechanism (5) is arranged, the adjusting mechanism (5) comprises an adjusting pipe (51) communicated with one end of the exhaust fan (3), the inner wall of the adjusting pipe (51) is fixedly connected with two sealing rings (52), the inner wall of the sealing ring (52) is rotatably connected with a gas resistance block (53), the inner wall of the gas resistance block (53) is slidably connected with a solid iron rod (54), the surface of the adjusting pipe (51) is fixedly connected with two positioning rings (59), the surface of the solid iron rod (54) is clamped to the inner wall of the positioning ring (59), and the whole adjusting pipe (51) is in "u" shape.
2. A novel NMP-containing exhaust gas and waste heat recovery device according to claim 1, characterized by The surface of the gas resistance block (53) is fixedly connected with a sliding rod (57), and the surface of the adjusting pipe (51) is provided with a plurality of intercepting rods (58).
3. A novel NMP-containing exhaust gas and waste heat recovery device according to claim 1, characterized by The end of the solid iron rod (54) is fixedly connected with a spring (55), and the top of the spring (55) is fixedly connected to the inner top wall of the gas resistance block (53).
4. A novel NMP-containing exhaust gas and waste heat recovery device according to claim 1, characterized by The top of the gas resistance block (53) is embeddedly installed with a magnetic attraction iron (56), and the surface of the solid iron rod (54) penetrates and is magnetically attracted to the surface of the magnetic attraction iron (56).
5. A novel NMP-containing exhaust gas and waste heat recovery device according to claim 1, characterized by The filtering mechanism (4) comprises a first sealing shell (41) communicated with one end of the heat exchange tank (1), one end of the adjusting pipe (51) is communicated with the first sealing shell (41), the top of the first sealing shell (41) is provided with a second sealing shell (42), and the inner wall of the first sealing shell (41) is provided with a filter screen (44) and an activated carbon adsorption screen (45).
6. A novel NMP-containing exhaust gas and waste heat recovery device according to claim 5, characterized by The inner wall of the first sealing shell (41) is fixedly connected with a plurality of limiting rods (46).
7. A novel NMP-containing exhaust gas and waste heat recovery device according to claim 5, characterized by The inner wall of the second sealing shell (42) is threadedly connected with a bolt (43), and the surface of the bolt (43) is threadedly connected to the inner wall of the first sealing shell (41).