A setting machine oil fume exhaust treatment equipment with fiber filter

Abstract

This utility model relates to a hair styling machine fume treatment device with a fiber filter, solving the problem of filter element clogging that easily occurs in existing filtration and adsorption methods during the treatment of hair styling machine fume. The device includes a whitening device, a spray device, an air-water exchanger, a high-voltage electrostatic device, a high-efficiency fiber filter, and a fan, arranged between the fume inlet and outlet. The fume in the high-efficiency fiber filter is top-in, bottom-out, with a partition between the upper and lower parts of the filter. A vertically arranged bag cage is located in the upper space of the filter, with the outermost layer of the bag cage wall being a hydrophobic and oleophobic layer. The inner side of the bag cage connects to the lower space of the filter. The fume in the filter enters from the top and passes through the bag cage wall from the outside in for filtration. This utility model treats hair styling machine fume exhaust gas through multiple methods including spray filtration, electrostatic capture, and high-efficiency fiber filtration, resulting in a low clogging rate, good treatment effect, and stable long-term operation.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment equipment, and relates to a device for treating oil fume waste gas from a stenter, and particularly to a device for treating oil fume waste gas from a stenter with a fiber filter. Background Technology

[0002] A setting machine is a mechanical device used in industrial manufacturing for shaping materials. It is mainly used in the processing of textiles (fabrics, socks), footwear (shoe uppers, boot shafts), and bamboo boards, using processes such as hot pressing, cold pressing, and steam to solidify the material's form. During operation, the setting machine generates exhaust gas containing oil mist, particulate matter, and volatile organic compounds. Traditional exhaust gas treatment methods, such as filtration and adsorption like activated carbon adsorption, are prone to filter clogging due to the condensation and coking of oil mist and lint. High-voltage electrostatic treatment is also used, but it cannot meet increasingly stringent environmental protection requirements. Summary of the Invention

[0003] The purpose of this invention is to solve the problem that existing filtration and adsorption methods are prone to filter clogging during the treatment of oily fumes from stenters, and the problem that high-voltage electrostatic discharge alone cannot meet high environmental protection requirements. This invention provides a stenter oily fumes treatment device with a fiber filter. The device uses a high-efficiency fiber filter with hydrophobic and oleophobic properties and is densely woven in multiple layers, which can effectively block oily fumes, particulate matter, water vapor, etc. in the exhaust gas.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a styling machine oil fume exhaust gas treatment device with fiber filter, wherein a whitening device, a spraying device, an air-water exchanger, a high-voltage electrostatic device, a high-efficiency fiber filter, and a fan are provided between the flue gas inlet and the flue gas outlet. The flue gas of the high-efficiency fiber filter enters from the top and exits from the bottom. A partition is provided between the upper and lower parts of the high-efficiency fiber filter. A bag cage is vertically arranged in the upper space of the high-efficiency fiber filter. The outermost layer of the bag cage wall is a hydrophobic and oleophobic layer. The inner side of the bag cage is connected to the lower space of the high-efficiency fiber filter. The flue gas of the high-efficiency fiber filter enters from the top and exits from the outside and passes through the bag cage wall for filtration.

[0005] The high-efficiency fiber filter's bag cage is specifically designed to handle oil and water in flue gas. It features a hydrophobic and oleophobic inner layer and a multi-layered, tightly woven construction, effectively blocking oil fumes, particulate matter, and water vapor in the exhaust gas. The bag cage has a vertical structure; the blocked oil mist, particulate matter, and water vapor adhere to the surface of the high-efficiency fiber bag and then flow naturally down the outer wall of the cage to the bottom drain outlet for natural removal, achieving a self-cleaning effect. Oily wastewater is separated by an oil-water separator, waste oil is recycled, and wastewater is treated before discharge.

[0006] Preferably, a cleaning nozzle is installed above the gap between the bag cages, a drain outlet is provided at the gap between the bag cages on the partition, and a return water outlet is provided at the bottom of the high-efficiency fiber filter; a steam rinsing device is also provided at the bottom of the bag cage. The high-efficiency fiber filter is equipped with a cleaning nozzle and a steam rinsing device. The cleaning nozzle can automatically spray and clean at a set time. During spray cleaning, the treatment of flue gas can be stopped, or the flue gas filtration can continue to operate. The steam rinsing device can automatically remove stubborn contaminants from the bag cage with steam at a set time (generally 3-6 months). The bag cage can adopt a quick-release structure. When not in operation, it is naturally fixed by its own weight. When in operation, the flue gas is drawn from top to bottom and fixed firmly by gravity. The bag cage can be quickly disassembled and installed for easy replacement or individual cleaning.

[0007] Preferably, the top of the bag cage is provided with a quick-release bracket, and the bag cage is detachably connected to the frame of the high-efficiency fiber filter using the quick-release bracket.

[0008] Preferably, the flue gas in the spraying device is vented from bottom to top. The spraying device includes a conical filter screen with its tip pointing downwards. An opening is located above the conical filter screen, and a water spray head is installed thereon. Above the water spray head is a water-spinning plate, which is a continuously rotating disc. The circumference of the water-spinning plate has flue gas passage openings. The conical filter screen sprays continuously from top to bottom, while the flue gas passes through it from bottom to top. Fibers and particulate matter filtered by the conical filter screen are continuously washed away by the water flow, reducing clogging. The water-spinning plate uses centrifugal dehydration to dehydrate and dry the sprayed flue gas, removing large water droplets.

[0009] Preferably, the smoke outlet is inclined.

[0010] Preferably, the water-spraying plate is a conical plate with a high center and a circumferential bottom.

[0011] Preferably, the high-efficiency fiber filters are stacked and arranged above the spray device, forming an integral connection.

[0012] Preferably, the gas-water exchanger is equipped with a coil for condensing the oil and water in the flue gas. Oil fume molecules condense into fine droplets within the gas-water exchanger, which can then be captured by a high-voltage electrostatic device.

[0013] Preferably, the connection sequence of the flue gas inlet and flue gas outlet is as follows: heat absorption end of the de-bleaching device, spray device, gas-water exchanger, high-voltage electrostatic device, high-efficiency fiber filter, fan, and heat release end of the de-bleaching device.

[0014] The collected and concentrated oily fumes first enter the heat recovery and initial cooling stage (stage 1) of the desulfurization device, then undergo intensive spraying (stage 2) and filtration (stage 3) to remove particulate matter and fibrous dust. Next, the fumes are centrifuged and dried (stage 4), then condensed in a turbulent air-water exchange cooler (stage 5), ensuring that the oily fume molecules are condensed into fine droplets. These droplets are then captured by a high-voltage electrostatic device (stage 6), followed by physical interception filtration through a high-efficiency fiber filter (stage 7). Finally, the fumes are heated and desulfurized at the heat release stage of the desulfurization device (stage 8), ensuring that the exhaust gas concentration is below the environmental regulations' allowable levels. Furthermore, an automatic online VOCs monitoring device can be installed at the exhaust outlet, and the purifier's data can be transmitted in real-time to relevant management personnel and environmental protection departments via mobile phone, computer, or network.

[0015] As another preferred embodiment, the connection sequence of the flue gas inlet and outlet devices is as follows: spray device, heat absorption end of the de-bleaching device, gas-water exchanger, high-voltage electrostatic device, high-efficiency fiber filter, fan, and heat release end of the de-bleaching device. In this scheme, the order of the heat absorption end of the de-bleaching device and the spray device is interchanged.

[0016] This invention treats the exhaust gas from the stenter through multiple methods, including spray filtration, electrostatic capture, and high-efficiency fiber filtration, resulting in a low clogging rate, good treatment effect, and stable operation over a long period of time. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the first structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the stacked structure of the spray device and the high-efficiency fiber filter of this utility model.

[0020] In the diagram: 1. Heat absorption end of the whitening device; 2. Spraying device; 3. Air-water exchanger; 4. High-voltage electrostatic device; 5. High-efficiency fiber filter; 6. Fan; 7. Heat release end of the whitening device; 8. Chimney; 9. Oil-water separator; 10. Cooling tower; 11. Conical filter screen; 12. Water spray head; 13. Water-spraying plate; 14. Smoke outlet; 15. Bag cage; 16. Cleaning nozzle; 17. Steam flushing device; 18. Water return port; 19. Baffle plate. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0022] Example 1: A hair styling machine oil fume treatment device with fiber filter, such as... Figure 1As shown in the diagram, this device consists of, in sequence, a whitening device heat absorption end 1, a spray device 2, an air-water exchanger 3, a high-voltage electrostatic device 4, a high-efficiency fiber filter 5, a fan 6, and a whitening device heat release end 7 between the flue gas inlet and outlet. A chimney 8 is located after the whitening device heat release end 7. The whitening device heat absorption end 1 and the whitening device heat release end 7 are the two ends of the whitening device. An oil-water separator 9 and a cooling tower 10 are also installed on one side of the device. The oil-water separator 9 is connected to the return water inlet 18 of each stage of the filtration device and is used for oil-water separation and oil recovery. The air-water exchanger 3 is equipped with coils that condense the oil and water in the flue gas, and the cooling tower 10 provides cooling to the air-water exchanger 3.

[0023] like Figure 2 As shown, the high-efficiency fiber filter 5 is stacked on top of the spray device 2, forming an integrated structure. The flue gas from the high-efficiency fiber filter 5 enters from the top and exits from the bottom. A partition 19 is installed between the upper and lower parts of the high-efficiency fiber filter. A vertically arranged bag cage 15 is located in the upper space of the high-efficiency fiber filter. The outermost layer of the bag cage wall is a hydrophobic and oleophobic layer. The inner side of the bag cage 15 connects to the lower space of the high-efficiency fiber filter. The flue gas enters the high-efficiency fiber filter from top to bottom and passes through the bag cage wall for filtration from the outside in. A cleaning nozzle 16 is installed above the gap between the bag cages. A drain port is provided at the gap between the bag cages on the partition 19. A steam rinsing device 17 is also installed upwards at the bottom of the bag cage. A return water port 18 is provided at the bottom of the high-efficiency fiber filter. A quick-release bracket is provided at the top of the bag cage, and the bag cage 15 is detachably connected to the frame of the high-efficiency fiber filter 5 using the quick-release bracket.

[0024] like Figure 2 As shown, the flue gas in the spray device 2 enters from the bottom and exits from the top. The spray device includes a conical filter screen 11 with its tip pointing downwards. An opening is located above the conical filter screen, and a water spray head 12 is installed thereon. Above the water spray head is a water-splitting plate 13, which is a continuously rotating disc. A flue gas passage 14 is provided around the circumference of the water-splitting plate 13 for the flue gas to pass through. The flue gas passage 14 is inclined to guide the flue gas. The water-splitting plate 13 is a conical plate with a high center and a low circumference, which can use centrifugal force to throw the flue gas outwards, achieving the effect of drying and removing large water droplets.

[0025] The process is as follows: (1) Waste gas collection and pretreatment: The high-temperature oil fume waste gas (containing a large amount of particulate matter, grease and VOCs) generated by the dyeing and finishing machine is first cooled and dusted by spraying in the exhaust pipe, and then enters the heat absorption end of the superconducting heat pipe whitening device for heat recovery. (2) Water spray treatment: The patented water spray tower is used for dense spraying (specific agents can be added) and filtration by filter screen to further remove fiber impurities and absorb some gaseous pollutants (such as non-methane total hydrocarbons, nitrogen oxides, ammonia, etc.). Finally, water droplets are removed by vortex dehydration device.

[0026] (3) Cooling and condensation: The gas then enters a turbulent tubular gas-water exchanger for deep cooling. This process causes the oil mist molecules in the exhaust gas to condense and aggregate into larger particles, and separates some water vapor.

[0027] (4) Core purification stage: • High-voltage electrostatic treatment: The condensed flue gas enters a high-frequency, high-voltage electrostatic field (frequency ≥ 11000Hz). VOCs and other organic matter are oxidized and decomposed into water, carbon dioxide, nitrogen, etc., under the bombardment of cathode electrons; simultaneously, oil mist particles are charged and adsorbed by the anode tube. The high-frequency power supply design effectively avoids the significant safety risks of arcing inherent in traditional industrial-frequency electrostatic discharge.

[0028] • High-efficiency fiber filtration: The flue gas then passes through an ultra-fine high-efficiency fiber filter, which physically intercepts and filters out escaped micron-sized aerosol particles, achieving a removal efficiency of over 95%. It uses specially formulated high-efficiency fiber filter media with a lotus leaf effect: 1. Oil repellency, preventing trapped oil mist from adhering and falling rapidly; 2. Water repellency, allowing water droplets to fall quickly, ensuring filter media permeability and reducing resistance. Ten months of practical use have proven that the filter media only needs cleaning every three to four months, with minimal steam consumption and short cleaning time, allowing for cleaning without shutting down the system, ensuring stable and reliable emissions.

[0029] (5) Emission stage: The purified clean gas is heated by the heat-releasing end of the superconducting heat pipe de-whitening device to make its temperature higher than the dew point, completely eliminating the visual pollution of "white plume", and finally being discharged stably and in compliance with standards through the exhaust pipe.

[0030] This solution has the following advantages 1. High-voltage electrostatic treatment and high-efficiency fiber filtration form a dual protection mechanism. Whether the high-voltage electrostatic device is used alone or only high-efficiency fiber filtration is used, the treated flue gas can meet the limit requirements. When the two treatment processes are operated in tandem, the concentration of particulate matter and dyeing and finishing fumes can be reduced to below 2 mg / m³.

[0031] 2. High Efficiency Guarantee: With high-efficiency fiber filtration as a basic guarantee, flue gas emissions can meet standards. This effectively prevents some enterprises from deliberately reducing the power of high-voltage electrostatic devices, water pumps, and other equipment during daily operation to evade supervision and secretly discharge pollutants in order to reduce operating costs.

[0032] 3. When the high-voltage electrostatic device of the equipment is operating at full load, the pollutants in the flue gas have been basically removed. At this time, the flue gas flowing through the ultra-fine fiber filter unit is quite clean, and only intermittent automatic steam rinsing is required during the daily operation of the equipment, which hardly incurs any additional operating costs.

[0033] 4. Due to the extremely low resistance of the microfiber filter (approximately 30 ohms), most of the existing high-voltage electrostatic precipitators do not need to be replaced. For example, a 3-to-1 system requires only a 55kW fan, facilitating low-cost upgrades and renovations. This is easily accepted by businesses.

[0034] 5. The original fan of the molding machine has been removed from the entire purification equipment. The entire smoke exhaust duct system adopts a negative pressure smoke exhaust mode, which fundamentally eliminates the smoke duct leakage problem that may be caused by positive pressure smoke exhaust.

[0035] Example 2: A stenter oil fume exhaust gas treatment device with fiber filter. In this solution, based on Example 1, the connection order between the flue gas inlet and the flue gas outlet is changed by swapping the heat absorption ends of the spray device and the whitening device. The overall connection sequence is: spray device, heat absorption end of whitening device, air-water exchanger, high-voltage electrostatic device, high-efficiency fiber filter, fan, heat release end of whitening device.

Claims

1. A band fiber filter type setting machine oil fume exhaust gas treatment apparatus comprising a fume inlet and a fume outlet, characterized by: A whitening device, a spraying device, a gas-water exchanger, a high-voltage electrostatic device, a high-efficiency fiber filter, and a fan are installed between the flue gas inlet and the flue gas outlet. The flue gas of the high-efficiency fiber filter enters from the top and exits from the bottom. A partition is installed between the upper and lower parts of the high-efficiency fiber filter. A bag cage is vertically installed in the upper space of the high-efficiency fiber filter. The outermost layer of the bag cage wall is a hydrophobic and oleophobic layer. The inner side of the bag cage is connected to the lower space of the high-efficiency fiber filter. The flue gas of the high-efficiency fiber filter enters from the top and exits from the outside and passes through the bag cage wall for filtration.

2. A setting machine oil fume exhaust treatment device with a fiber filter according to claim 1, characterized in that: A cleaning nozzle is provided above the gap between the bag cages, a drain outlet is provided at the gap between the bag cages on the partition, and a return water outlet is provided at the bottom of the high-efficiency fiber filter; a steam rinsing device is also provided at the bottom of the bag cage.

3. A setting machine oil fume exhaust treatment device with a fiber filter according to claim 1, characterized in that: The top of the bag cage is equipped with a quick-release bracket, and the bag cage is detachably connected to the frame of the high-efficiency fiber filter using the quick-release bracket.

4. A setting machine oil fume exhaust treatment device with a fiber filter according to claim 1, characterized in that: The flue gas of the spray device enters from the bottom and exits from the top. The spray device includes a conical filter screen with the tip of the conical filter screen facing downward. The top of the conical filter screen is open and equipped with a water spray head. A water-spraying plate is installed above the water spray head. The water-spraying plate is a continuously rotating disc shape, and a flue gas passage is provided around the circumference of the water-spraying plate for the flue gas to pass through.

5. A setting machine oil fume exhaust treatment device with a fiber filter according to claim 4, characterized in that: The smoke outlet is set at an angle.

6. A setting machine oil fume exhaust treatment apparatus with a fiber filter according to claim 4, characterized by: The water-spraying plate is a conical plate with a high center and a circumferential bottom.

7. A setting machine oil fume exhaust treatment device with a fiber filter according to claim 1, characterized in that: The high-efficiency fiber filters are stacked and arranged above the spray device, forming an integral connection.

8. A setting machine oil fume exhaust treatment device with a fiber filter according to claim 1, characterized in that: The gas-water exchanger is equipped with a coil that condenses the oil and water in the flue gas.

9. The hair styling machine fume treatment equipment with fiber filter according to claim 1, characterized in that: The connection sequence of the flue gas inlet and flue gas outlet devices is as follows: heat absorption end of the de-bleaching device, spray device, gas-water exchanger, high-voltage electrostatic device, high-efficiency fiber filter, fan, and heat release end of the de-bleaching device.

10. A setting machine oil fume exhaust treatment device with a fiber filter according to claim 1, characterized in that: The connection sequence of the flue gas inlet and flue gas outlet devices is as follows: spray device, heat absorption end of the whitening device, gas-water exchanger, high-voltage electrostatic device, high-efficiency fiber filter, fan, and heat release end of the whitening device.

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