Waste gas purification apparatus, and intelligent residual heat utilization and deep treatment device for printing and dying waste gas

Abstract

A waste gas purification apparatus, and an intelligent residual heat utilization and deep treatment device for printing and dyeing waste gas. The waste gas purification apparatus comprises a circulating water storage tank (1), a liquid circulation tank (2), a water filtering system (3) and a bubble generating apparatus (4) both connected to the circulating water storage tank (1), and an organic waste gas removing apparatus (5). An upper end of the organic waste gas removing apparatus (5) is connected to the bubble generating apparatus (4) and the liquid circulation tank (2), and a lower end of the organic waste gas removing apparatus (5) is fixedly connected to the liquid circulation tank (2). The intelligent residual heat utilization and deep treatment device for printing and dyeing waste gas comprises a residual heat cascade utilization unit, a spraying unit, a composite pulse electrostatic adsorption unit, a two-stage high-temperature water decolorization unit, and an air exhaust unit which are sequentially arranged in a waste gas circulation direction, and further comprises an oil-water separation tank (6), a sodium chloride electrolysis apparatus (7), and the waste gas purification apparatus.

Description

Exhaust gas purification device and intelligent printing and dyeing waste gas waste heat utilization and deep treatment equipment Technical Field

[0001] The present invention relates to the technical field of printing and dyeing waste gas treatment, and in particular to a waste gas purification device and intelligent printing and dyeing waste gas waste heat utilization and deep treatment equipment. Background Art

[0002] In the production process of textile printing and dyeing industry, high temperature conditions are required, such as the setting and drying temperature of 210-230℃. As a result, the exhaust gas generated also has a high temperature and a high oil content of about 400-600mg / m 3 In addition, this high-temperature exhaust gas also contains a lot of fluff, impurities and adhesions, and has a strong odor and smell. Therefore, in the textile printing and dyeing industry, high-temperature exhaust gas treatment is relatively difficult. Dust particles and other chemical harmful substances in high-temperature exhaust gas not only pollute the environment, but also cause great harm to human health.

[0003] Existing technologies typically treat high-temperature exhaust gas from the printing and dyeing industry using a "water spray + heat exchange cooling + electrostatic dust removal" approach. However, this approach fails to effectively meet environmental protection requirements. The equipment is prone to clogging and fire, presenting safety hazards and inconvenient maintenance. Existing treatment methods also fail to fully remove odor and odor from the exhaust gas, are inefficient at purifying high-temperature exhaust gas, and fail to fully utilize the waste heat from the high-temperature exhaust gas.

[0004] Summary of the Invention

[0005] To this end, the technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide an exhaust gas purification device and intelligent printing and dyeing exhaust gas waste heat utilization and treatment equipment, realize the cascade utilization of waste heat of high-temperature exhaust gas in the textile printing and dyeing industry and the combined removal of odor and bad smell, and at the same time achieve strong capture of ultrafine particles, and combine with automatic control to achieve low-energy operation.

[0006] In order to solve the above technical problems, the present invention provides an exhaust gas purification device, comprising:

[0007] Circulating water storage tank;

[0008] Liquid circulation tank;

[0009] a water filtration system connected to the circulating water storage tank;

[0010] a bubble generating device connected to the circulating water storage tank;

[0011] An organic waste gas removal device, the upper end of which is connected to both the bubble generating device and the liquid circulation tank, and the lower end of which is connected to the liquid circulation tank;

[0012] The organic waste gas removal device includes a support base, a reaction tank is mounted on the upper end of the support base, a drive motor is mounted on the reaction tank, a first connecting pipe and a second connecting pipe are mounted on the reaction tank, the first connecting pipe is connected to the liquid circulation tank, the second connecting pipe is connected to the bubble generating device, and the bottom of the reaction tank and the liquid circulation tank are connected by a third connecting pipe; an air outlet pipe is mounted on the upper end of the reaction tank;

[0013] A connecting shaft is coaxially arranged on the output shaft of the driving motor, and a guide vane is provided on the connecting shaft, and the edge of the guide vane is tangent to the inner wall of the reaction tank;

[0014] A fixed screw is provided in the reaction tank, the fixed screw is arranged at the upper end of the third connecting pipe, and a micro motor is provided between the fixed screw and the third connecting pipe, and a bubble cleaning assembly is provided on the fixed screw; two groups of spiral grooves equidistant from the guide blades are respectively provided on the upper and lower sides of the guide blades on the connecting shaft, and the bubble cleaning assembly is slidably connected to the spiral grooves.

[0015] Preferably, the bubble cleaning assembly includes a rotating block and a rotating frame, the rotating block is provided with an internal thread, the rotating block is assembled on the fixed screw through the internal thread, and the upper and lower planes of the rotating block are provided with inner column cleaning pads; the rotating frame is rotatably assembled at the center of the side wall of the rotating block, and two groups of sliding blocks are assembled on the rotating frame, and the two groups of sliding blocks are respectively slidably assembled in the two groups of spiral grooves, and a pair of brush blades are arranged on the inner sides of the two groups of sliding blocks relative to each other, and the brush blades are provided with brushes.

[0016] Preferably, an outer column cleaning pad is coaxially slidably sleeved on the connecting shaft, a rotating shaft is provided on the outer side surface of the sliding block, a bidirectional telescope is slidably provided on the rotating shaft, and the bidirectional telescope is embedded in the outer column cleaning pad.

[0017] Preferably, an exhaust port is provided at the upper end of the liquid circulation tank, and a water pump is installed at the end of the first connecting pipe connected to the liquid circulation tank.

[0018] On the other hand, the present invention also provides intelligent printing and dyeing waste gas waste heat utilization and deep treatment equipment, including a waste heat cascade utilization unit, a spray unit, a composite pulse electrostatic adsorption tower unit, a two-stage high-temperature water dewhitening unit and an exhaust unit arranged in sequence along the waste gas flow direction, and also includes an oil-water separation box, a sodium chloride electrolysis device and the waste gas purification device as described above, the oil-water separation box is respectively connected to the waste gas purification device, the sodium chloride electrolysis device, the composite pulse electrostatic adsorption tower unit, and the waste heat cascade utilization unit, the sodium chloride electrolysis device is connected to the spray unit, wherein the waste gas purification device is respectively connected to the spray unit, the composite pulse electrostatic adsorption tower unit and the oil-water separation box.

[0019] Preferably, the spray unit includes a micro-bubble water spray device, a hypohalous acid water spray device and a sodium hydroxide water spray device, and the micro-bubble water spray device is connected to the bubble generating device in the exhaust gas purification device through a first connecting pipe.

[0020] Preferably, the compound pulse electrostatic adsorption tower unit includes a first compound pulse electrostatic adsorption tower and a second compound pulse electrostatic adsorption tower connected to each other, the exhaust port of the first compound pulse electrostatic adsorption tower is connected to the air inlet of the second compound pulse electrostatic adsorption tower, and the outlet pipe in the exhaust gas purification device is connected to the air inlet of the second compound pulse electrostatic adsorption tower.

[0021] Preferably, the first liquid inlet pipe in the exhaust gas purification device is connected to the oil-water separation box.

[0022] Preferably, the waste heat cascade utilization unit includes a high-temperature gas-to-gas heat exchange device, a medium-temperature gas-to-water heat exchange device and a low-temperature gas-to-gas heat exchange device which are sequentially arranged along the exhaust gas flow direction.

[0023] Preferably, it also includes a plurality of automatic steam cleaning devices and a plurality of automatic alkaline water cleaning devices, and the plurality of automatic steam cleaning devices and the plurality of automatic alkaline water cleaning devices are respectively arranged in the waste heat cascade utilization unit and the composite pulse electrostatic adsorption tower unit.

[0024] Preferably, it further comprises a plurality of automatic adhesion detection devices, which are respectively arranged in the waste heat cascade utilization unit and the composite pulse electrostatic adsorption tower unit.

[0025] Preferably, the exhaust unit includes an exhaust pipe, an exhaust fan and a real-time gas monitoring device arranged in the exhaust pipe.

[0026] The above technical solution of the present invention has the following advantages over the prior art:

[0027] The exhaust gas purification device described in the present invention can make the low-concentration small-molecule chain organic waste gas in the exhaust gas fully contact with the high-concentration micro-bubble spray water, and then produce dual physical and chemical effects such as mechanical shearing, pyrolysis, and free radical oxidation, decomposing the small-molecule chain organic pollutants in the exhaust gas into CO2, H2O, N2 and some solid particulate matter. In addition, the exhaust gas purification device of the present invention can make the organic pollutants dissolved in water react and degrade them. At the same time, it solves the problem of some bubbles adhering to the inner wall of the treatment device, greatly improving the purification efficiency of the device. At the same time, the intelligent printing and dyeing waste gas utilization and treatment equipment described in the present invention realizes the cascade utilization of waste heat of high-temperature exhaust gas in the textile printing and dyeing industry and the combined removal of odor and bad smell, and can also achieve the strong capture of ultrafine particles. Combined with automatic control, it realizes a low-energy operation waste heat cascade utilization process, thereby achieving the dual effects of energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0029] FIG1 is a schematic structural diagram of an exhaust gas purification device according to a preferred embodiment of the present invention.

[0030] FIG2 is a schematic diagram of a partial structure of an organic waste gas removal device in a waste gas purification device according to a preferred embodiment of the present invention.

[0031] FIG3 is a partial structural diagram of the bubble cleaning assembly in the exhaust gas purification device according to the best embodiment of the present invention.

[0032] FIG4 is a schematic diagram of the expansion of the bidirectional expansion joint in the exhaust gas purification device according to the best embodiment of the present invention.

[0033] FIG5 is a schematic structural diagram of an intelligent printing and dyeing waste gas utilization and treatment device according to a preferred embodiment of the present invention.

[0034] 1. Circulating water storage tank; 11. First connecting pipe; 12. Second connecting pipe; 13. Third connecting pipe; 14. Fourth connecting pipe; 2. Liquid circulation tank; 21. Exhaust port; 22. Water pump; 3. Water filtration system; 30. First liquid inlet pipe; 4. Bubble generating device; 5. Organic waste gas removal device; 51. Support base; 52. Reactor; 53. Drive motor; 54. Exhaust pipe; 55. Connecting shaft; 56. Guide vane; 57. Fixed screw; 58. Bubble cleaning assembly; 581. Rotating block; 5810. Inner column cleaning pad; 582. Rotating frame; 583. First sliding block; 584. Second sliding block; 585. First brush blade; 586. Second brush blade; 587. Brush; 588. Outer column cleaning pad; 589. Two-way telescoping device; 59. Discharge hole; 590. Tension spring; 6. Oil-water separation box; 60. High-temperature gas-to-gas heat exchange device; 601. First automatic steam cleaning device; 602. Second automatic steam cleaning device; 61. Medium-temperature gas-to-water heat exchange device; 62. Low-temperature gas-to-gas heat exchange device; 63. First automatic alkaline water cleaning device; 64. Second automatic alkaline water cleaning device; 65. Third automatic alkaline water cleaning device; 66. First automatic adhesion detection device; 67. Second automatic adhesion detection device; 68. Third automatic adhesion detection device; 69. Fourth automatic adhesion detection device; 7. Sodium chloride electrolysis device; 81. Micro-bubble water spraying device; 82. Hypohalous acid water spraying device; 83. Sodium hydroxide water spraying device; 84. Demisting device; 91. First composite pulse electrostatic adsorption tower; 92. Second composite pulse electrostatic adsorption tower; 93. Exhaust duct; 94. Exhaust fan; 95. Gas monitoring device; 96. Electrical control cabinet. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0036] Example 1

[0037] 1 to 5 , the present invention discloses an exhaust gas purification device, comprising:

[0038] Circulating water storage tank 1;

[0039] Liquid circulation tank 2;

[0040] A water filtration system 3, the outlet of which is connected to the circulating water storage tank 1, and the inlet of the water filtration system 3 is used to filter external polluting liquids, and the inlet of the water filtration system 3 is provided with a first liquid inlet pipe 30;

[0041] A bubble generating device 4, which is connected to the circulating water storage tank 1;

[0042] The organic waste gas removal device 5 has its upper end connected to both the bubble generating device 4 and the liquid circulation tank 2 , and its lower end is fixedly connected to the liquid circulation tank 2 .

[0043] As a preferred embodiment, the organic waste gas removal device 5 includes a support base 51, with a reaction tank 52 mounted on its upper end. The reaction tank 52 is equipped with a drive motor 53. The reaction tank 52 is also equipped with a first connecting pipe 11 and a second connecting pipe 12, which are located on either side of the drive motor 53. The first connecting pipe 11 is connected to the liquid circulation tank 2, and the second connecting pipe 12 is connected to the bubble generating device 4. The bottom of the reaction tank 52 is connected to the liquid circulation tank 2 via a third connecting pipe 13; the upper end of the reaction tank 52 is equipped with an air outlet pipe 54.

[0044] Furthermore, an exhaust port 21 is provided at the center of the upper end of the liquid circulation tank 2 , and a water pump 22 is assembled on the end of the first connecting pipe 11 connected to the liquid circulation tank 2 . The water pump 22 is provided beside the exhaust port 21 .

[0045] Since the bubbles generated in the bubble generating device 4 are not uniform, the water pressure that breaks the balance is different, preventing some bubbles from exploding at the bottom of the organic waste gas removal device 5 and entering the liquid circulation tank 2 under the influence of the water flow. Therefore, an exhaust port 21 is provided, and at the same time, the lower end of the water pump 22 penetrates into the lower end of the liquid surface of the liquid circulation tank 2. The liquid in the liquid circulation tank 2 is sucked into the organic waste gas removal device 5 under the action of the water pump 22, thereby realizing the recycling of water resources.

[0046] Furthermore, a connecting shaft 55 is coaxially arranged on the output shaft of the driving motor 53 , and a guide vane 56 is provided on the connecting shaft 55 . The edge of the guide vane 56 is tangent to the inner wall of the reaction tank 52 .

[0047] In detail, the reaction tank 52 is equipped with a fixed screw 57, which is located at the end of the third connecting pipe 13 that connects to the reaction tank 52. The fixed screw 57 is also located at the upper end of the third connecting pipe 13. A micromotor is installed between the fixed screw 57 and the third connecting pipe 13, and is mounted on the third connecting pipe 13 to drive the fixed screw 57 to rotate. It is worth noting that the fixed screw 57 is equipped with a bubble cleaning assembly 58; the connecting shaft 55 is provided with two sets of spiral grooves on the upper and lower sides of the guide vanes 56, equidistant from the guide vanes, and the bubble cleaning assembly 58 is slidably connected to the spiral grooves.

[0048] The micro motor rotates counterclockwise, and the drive motor 53 rotates clockwise. When the bubble cleaning component 58 moves to the bottom of the guide blade 56, the micro motor starts. Since the diameters of the bubbles generated by the bubble generating device 4 are different, and the bubbles need to form a balance in the water, the pressure inside the bubbles must be equal to the water pressure and the supplementary pressure generated by the surface tension of the bubbles by the water. When this balance is broken, the bubbles will burst. At the same time, the pressure inside the bubbles is inversely proportional to the diameter of the bubbles. Therefore, the water pressure required to burst bubbles of different diameters is different. If bubbles are injected from the bottom, some bubbles will burst if they are not fully combined with water. The bubbles will burst, and some of the bubbles that have not reached the equilibrium condition will rise to the water surface with the water flow and will not burst in the water. At the same time, some of them will adhere to the inner wall of the container, so that the guide blades 56 can make the water flow downward. Because the bubbles are small, their buoyancy can be basically ignored. The bubbles are easily affected by the flow of water and move downward with the water flow. As the depth of the bubbles in the water increases, the water pressure they are subjected to will also increase, so that bubbles of different diameters can gradually reach the bursting condition while fully combining with water. The guide blades 56 clean the bubbles attached to the inner wall of the reaction tank 52 while rotating. Such an arrangement can further improve the purification efficiency of the bubbles.

[0049] In the initial state, the bubble cleaning component 58 is above the guide blade 56. When the device is running, a certain amount of bubbles will adhere to the guide blade 56, which will affect the purification efficiency. When the guide blade 56 starts to rotate, the micro motor is turned off, and the fixed screw 57 is in a relatively static state. Since the bubble cleaning component 58 is slidably connected to the spiral groove, the guide blade 56 drives the bubble cleaning component 58 to rotate while the fixed screw 57 causes it to move downward, thereby cleaning the bubbles on the guide blade 56 at different positions. When it moves to the bottom of the guide blade 56, the micro motor starts, and the speed of the micro motor is greater than the speed of the drive motor 53, causing the bubble cleaning component 58 to rise until it returns to the initial position. The micro motor is turned off, and the above operation is repeated, which can effectively remove the micro bubbles attached to the various components of the device, thereby improving its purification efficiency.

[0050] Furthermore, a plurality of discharge holes 59 are provided on the third connecting pipe 13 , which is connected to the reaction tank 52 at the lower end of the fixed screw 57 .

[0051] During operation, first, water of 90% of its volume is injected into the reaction tank 52, and the bubble generating device 4 is started to inject microbubbles into the reaction tank 52. At the same time, the switch valve, the driving motor 53 and the water pump 22 below the liquid circulation tank 2 are opened, and a part of the water flows into the liquid circulation tank 2 through the discharge hole 59. Driven by the water flow, the microbubbles will move downward, and with the increase of the depth, the equilibrium condition will be gradually broken, and a large number of hydroxyl active groups will be generated by explosion. The hydroxyl active groups and the active oxygen groups will quickly complete the oxidation and degradation of organic pollutants in the water, thereby purifying the organic pollutants. The purpose of the pollutants is to remove the purified gas, which will rise and be discharged from the device through the outlet pipe 54. At the same time as the water flows into the liquid circulation tank 2, the water pump 22 will re-inject the water in the liquid circulation tank 2 into the reaction tank 52. The injection rate of the water pump 22 is equal to the outflow rate of the reaction tank 52, so that the liquid level in the reaction tank 52 is always maintained at the initial level, and the liquid level in the liquid circulation tank 2 is lower than the liquid level in the reaction tank 52, which can form a siphon effect to a certain extent, thereby accelerating the liquid flow rate in the reaction tank 52, thereby improving the purification efficiency.

[0052] It can be seen from this that the present invention is to protect an exhaust gas purification device based on the principle of micro-bubble exhaust gas treatment, which is equipped with a circulating water storage tank, a liquid circulation tank, a water filtration system, a bubble generating device, and an organic waste gas removal device. The water filtration system 3 is connected to the external polluting liquid, which enters the circulating water storage tank 1 after filtration and purification to realize the recycling of water resources. The exhaust gas enters the bubble generating device 4, which combines the exhaust gas with water to produce micro-nano-level bubbles, and enters the organic waste gas removal device 5. The bubbles continue to move downward under the action of the water flow until their internal balance is destroyed and they explode, degrading the pollutants therein. The purified gas floats up and is discharged through the outlet pipe 54. The liquid enters the liquid circulation tank 2 from the lower end of the organic waste gas removal device 5 through the third connecting pipe 13.

[0053] Furthermore, the bubble cleaning assembly 58 includes a rotating block 581 and a rotating frame 582, the rotating block 581 is provided with an internal thread, the rotating block 581 is assembled on the fixed screw 57 through the internal thread, and the upper surface and lower surface of the rotating block 581 are respectively provided with two groups of inner column cleaning pads 5810; the rotating frame 582 is rotatably assembled at the center of the side wall of the rotating block 581, and the rotating frame 582 is symmetrically equipped with a first sliding block 583 and a second sliding block 584, the first sliding block 583 and the second sliding block 584 are respectively slidably assembled in the two groups of the spiral grooves, the first sliding block 583 and the second sliding block 584 are relatively provided with a first brush blade plate 585 and a second brush blade plate 586, and the first brush blade plate 585 and the second brush blade plate 586 are relatively provided with brushes 587.

[0054] Specifically, an outer column cleaning pad 588 is coaxially slidably mounted on the connecting shaft 55. A first rotating shaft is disposed on the outer side of the first sliding block 583. A bidirectional expander 589 is slidably mounted on the first rotating shaft. The bidirectional expander 589 is embedded in the outer column cleaning pad 588. The outer column cleaning pad 588 is coaxially slidably mounted on the guide vane 56. A bidirectional expander 589 is similarly mounted on the second sliding block 584.

[0055] The bidirectional telescopic device 589 is a bidirectional four-stage telescopic mechanism, and each stage is connected by two sets of tension springs 590.

[0056] In the specific implementation process, the two groups of inner column cleaning pads 5810 and outer column cleaning pads 588 can respectively clean the bubbles attached to the surface of the guide blade 56 column, and move downward under the drive of the guide blade 56 and the water flow until it breaks the equilibrium condition and explodes. The rotating block 581 cleans the bubbles on the fixed screw 57 during the rotation process, and the brush 587 removes the bubbles on the guide blade 56. In the process of the rotating block 581 rotating and descending, the first sliding block 583 and the second sliding block 584 will always fit the spiral groove on the connecting shaft 55 through the rotation of the rotating frame 582, so that the first brush blade plate 58 5 and the second brush blade plate 586 are located at a plane that is always parallel to the cross section of the guide blade 56 at that position. At the same time, during the rotation of the first sliding block 583 and the second sliding block 584, the expansion and contraction of the various levels of the two-way expander 589 ensure that the outer column cleaning pad 588 is always coaxial with the guide blade 56. The tension spring 590 can make the two-way expander 589 contract when there is no action of the first sliding block 583 and the second sliding block 584, so as to prevent it from affecting the up and down movement of the rotating block 581. At the same time, the tension spring 590 has a certain limiting effect on the various levels of the two-way expander 589, so as to prevent it from detaching and causing damage to the two-way expander 589.

[0057] The exhaust gas purification device of the present invention, based on the microbubble principle, enables low-concentration small-molecule organic waste gases in the exhaust gas to fully contact with high-concentration microbubble spray water, thereby inducing dual physical and chemical effects such as mechanical shearing, thermal decomposition, and free radical oxidation, decomposing small-molecule organic pollutants in the exhaust gas into CO2, H2O, N2, and some solid particulate matter. Furthermore, the exhaust gas purification device of the present invention can cause organic pollutants dissolved in water to react and degrade them. This also solves the problem of some bubbles adhering to the inner walls of the treatment device, greatly improving the purification efficiency of the device.

[0058] Example 2

[0059] The present invention also discloses intelligent equipment for utilizing and deeply treating waste heat from printing and dyeing waste gas, including:

[0060] Along the exhaust gas flow direction, a waste heat cascade utilization unit, a spray unit, a compound pulse electrostatic adsorption tower unit, a two-stage high-temperature water decolorization unit, and an exhaust unit are sequentially arranged. Exhaust gas generated by printing and dyeing enters the waste heat cascade utilization unit, passes through the spray unit, the compound pulse electrostatic adsorption tower unit, the two-stage high-temperature water decolorization unit, and is discharged by the exhaust unit.

[0061] The system also includes an oil-water separation tank 6, a sodium chloride electrolysis device 7, and the aforementioned exhaust gas purification device. The oil-water separation tank 6 is connected to the exhaust gas purification device, the sodium chloride electrolysis device 7, the composite pulse electrostatic adsorption tower unit, and the waste heat cascade utilization unit. The sodium chloride electrolysis device 7 is connected to the spray unit.

[0062] It should be noted that the exhaust gas purification device is respectively connected to the spray unit and the composite pulse electrostatic adsorption tower unit.

[0063] Specifically, the spray unit includes a microbubble water spray device 81, a hypohalous acid water spray device 82 and a sodium hydroxide water spray device 83. The microbubble water spray device is connected to the bubble generating device in the exhaust gas purification device through a fourth connecting pipe 14. It should be noted that the fourth connecting pipe 14 is connected to the second connecting pipe 12 of the exhaust gas purification device.

[0064] The sodium chloride electrolysis device 7 is capable of simultaneously producing hypochlorous acid solution and sodium hydroxide solution. The generated hypochlorous acid solution is fed into the hypohalous acid water spray device 82. The atomized hypochlorous acid spray water continues to undergo an oxidative decomposition reaction with the remaining organic waste gas in the exhaust gas, further removing the organic waste gas odor contained in the exhaust gas. This preparation is immediate and immediate, effectively avoiding the problem of sodium hypochlorite's easy decomposition. The sodium hydroxide solution generated by the sodium chloride electrolysis device 7 is fed into the sodium hydroxide water spray device 83, thereby neutralizing unreacted hypochlorous acid from the preceding process, eliminating corrosion to subsequent equipment. It also reacts with the acidic waste gas in the exhaust gas, reducing odor. The spray also intercepts lint, particulate matter, carbon black, and the like, while simultaneously entraining it with water, facilitating electrostatic adsorption in subsequent processes. Because the exhaust gas from textile printing and dyeing finishing and drying equipment is fine and capillary and contains a high concentration of particulate matter, particularly when heated by direct natural gas combustion, a large amount of ultrafine particulate matter is generated. Carbon black, an insulating material, is not easily charged during electrostatic adsorption, resulting in poor adsorption if the preceding process does not entrain water. Such a setting can effectively solve the problem of poor electrostatic adsorption at the rear end.

[0065] In addition, a demisting device 84 is provided at the end of the spraying device. The demisting device 84 adopts a double-stage folding plate mechanism, which can effectively remove water droplets and mist, and remove oil droplets and particulate matter, thereby reducing the processing pressure of the subsequent section.

[0066] Furthermore, the composite pulse electrostatic adsorption tower unit comprises a first composite pulse electrostatic adsorption tower 91 and a second composite pulse electrostatic adsorption tower 92, each connected to the other. The exhaust port of the first composite pulse electrostatic adsorption tower 91 is connected to the air inlet of the second composite pulse electrostatic adsorption tower 92, and the exhaust pipe 54 of the exhaust gas purification device is connected to the air inlet of the second composite pulse electrostatic adsorption tower 92. By superimposing a pulse voltage on a base voltage and adjusting the amplitude and frequency, the capture efficiency of ultrafine particles is enhanced, effectively improving the capture of fine carbon black produced when natural gas is directly burned. The composite pulse electrostatic adsorption tower unit utilizes a honeycomb vertical electric field, resulting in a stable and reliable overall structure. Both the first and second composite pulse electrostatic adsorption towers 91 and 92 utilize upward-discharging negative pressure adsorption, resulting in relatively few oil droplets being removed. Oil dust and other substances are efficiently adsorbed and condensed, and then discharged from the sewage outlet pipe under the action of gravity. Furthermore, an automatic water-cleaning vortex nozzle is installed on the upper part, and an automatic steam-cleaning device is installed on the lower part to clean the mixture of oil, wax, and particulate matter adhering to the pipe wall. In addition, an insulating ceramic automatic cleaning mechanism is provided to keep the interior of the electrostatic tower clean for a long time and avoid safety hazards.

[0067] Specifically, the dual-stage high-temperature water dewhitening unit is installed at the outlet of the second composite pulse electrostatic adsorption tower 92. The dual-stage high-temperature water dewhitening unit utilizes steam condensate collected from the workshop and high-temperature clean water recovered from the dye vats to perform a parallel dual-stage heating and dewhitening process on the purified exhaust gas, thereby eliminating the "visual pollution" of white water vapor at the exhaust outlet and achieving "colorless and odorless" ultra-low emissions.

[0068] The exhaust unit is connected to the two-stage high-temperature water deoxidation unit and includes an exhaust pipe 93, an exhaust fan 94 disposed within the exhaust pipe 93, and a real-time gas monitoring device 95. The gas monitoring device 95 can monitor the non-methane total hydrocarbons and odor in the exhaust gas and can issue an alarm when the emission is abnormal.

[0069] The first liquid inlet pipe 30 in the exhaust gas purification device is connected to the oil-water separation box 6 , and the liquid in the oil-water separation box 6 can enter the water filtration system 3 of the exhaust gas purification device through the first liquid inlet pipe 30 .

[0070] It should be noted that the waste heat cascade utilization unit includes a high-temperature gas-to-gas heat exchange device 60, a medium-temperature gas-to-water heat exchange device 61, and a low-temperature gas-to-gas heat exchange device 62, which are sequentially arranged along the direction of exhaust gas flow. Through the high-temperature gas-to-gas heat exchange device 60, high-temperature fresh air (greater than 100°C) can be transported to the original production equipment for use, and an automatic back-blowing device is provided at the air inlet filter to avoid clogging of the air inlet filter; the medium-temperature hot water (50-70°C) in the medium-temperature gas-to-water heat exchange device 61 can be recycled for production use, effectively saving energy; the hot air from the low-temperature gas-to-gas heat exchange device 62 can be recycled for winter workshop heating, air source heat pump intake, drying equipment preheating, and other working conditions that require fresh hot air. The waste heat cascade utilization process maximizes the utilization of waste heat and achieves a full combination of energy conservation and environmental protection.

[0071] The waste heat cascade utilization unit also features an air pressure regulator, located at the inlet of the medium-temperature air-water heat exchanger 61. This regulator can adjust the system air pressure based on actual operating conditions, adjusting the fan operating frequency in real time to facilitate energy conservation. A backwash mechanism is also installed at the front of the air pressure gauge to ensure stable operation.

[0072] The treatment equipment of the present invention also includes multiple automatic alkaline water cleaning devices, which are connected to the sodium chloride electrolysis device 7 to obtain sodium hydroxide solution from the sodium chloride electrolysis device 7. Specifically, it includes a first automatic alkaline water cleaning device 63 located in the low-temperature gas-to-gas heat exchange device 62, a second automatic alkaline water cleaning device 64 located in the first composite pulse electrostatic adsorption tower 91, and a third automatic alkaline water cleaning device 65 located in the second composite pulse electrostatic adsorption tower 92.

[0073] In detail, the treatment equipment also includes multiple automatic adhesion detection devices, which use ultrasonic surface waves to detect adhesions on the metal surface inside the equipment. When the adhesions accumulate to a certain level, the online automatic cleaning device is activated, effectively solving the problem of adhesion blockage inside the equipment and the safety problem of adhesion fire. Multiple automatic adhesion detection devices are respectively arranged in the waste heat cascade utilization unit and the compound pulse electrostatic adsorption tower unit. Specifically, they include a first automatic adhesion detection device 66 provided in the high-temperature gas-to-gas heat exchange device 60, a second automatic adhesion detection device 67 provided in the medium-temperature gas-to-water heat exchange device 61, a third automatic adhesion detection device 68 provided in the first compound pulse electrostatic adsorption tower 91, and a fourth automatic adhesion detection device 69 provided in the second compound pulse electrostatic adsorption tower 92.

[0074] Furthermore, the treatment equipment also includes a plurality of automatic steam cleaning devices, including a first automatic steam cleaning device 601 provided at the high-temperature gas-to-gas heat exchange device 60, and a second automatic steam cleaning device 602 provided at the outlet of the spray unit.

[0075] Furthermore, the treatment equipment is equipped with multiple temperature sensors for real-time temperature monitoring, facilitating appropriate control and adjustment. For example, if the temperature exceeds a warning level, an alarm is triggered to shut down the equipment, automatically activate steam and water firefighting systems, and notify the production workshop of the fire. The outlet air temperature and fan frequency are adjusted in real time, as is the dewatering temperature and proportional valve.

[0076] The treatment equipment also includes an electrical control cabinet 96, and the waste heat cascade utilization unit, spray unit, composite pulse electrostatic adsorption tower unit, two-stage high-temperature water dewhitening unit, exhaust unit, multiple alkaline water automatic cleaning devices, wind pressure regulating devices, multiple steam automatic cleaning devices, multiple adhesion automatic detection devices, and multiple temperature detection devices are all connected to the electrical control cabinet to achieve automatic control.

[0077] When the exhaust gas purification device of the present invention is used in conjunction with the intelligent printing and dyeing exhaust gas utilization and treatment equipment, its working principle and process are as follows:

[0078] After the exhaust gas generated by the process has been cooled by heat exchange and sprayed multiple times in the early stage, the polluting liquid generated in it enters the oil-water separation box 6. After preliminary sedimentation, large particles settle to the bottom. After the upper oil and water are separated, water is taken from the oil-water separation box 6 and enters the water filtration system 3. After filtration, it enters the circulating water storage tank 1 to realize the recycling of water resources. At this time, the wastewater dissolves some harmful organic pollutants.

[0079] The bubble generator 4 generates micro-nano bubbles in the filtered wastewater and divides them into two pipelines. One pipeline is connected to the micro-bubble water spraying device 81 and is used to directly spray the exhaust gas. The micro-bubble water spraying device 81 contacts the low-concentration small-molecule organic waste gas in the exhaust gas and undergoes physical and chemical dual effects such as mechanical shearing, thermal decomposition, and free radical oxidation, thereby decomposing the small-molecule VOCs in the exhaust gas into carbon dioxide, water, nitrogen, and some solid particulate matter.

[0080] The other pipe enters the organic waste gas removal device 5. Bubbles, driven downward by the water flow, burst after their internal equilibrium is disrupted, degrading the pollutants. The purified organic pollutants then produce gases that rise and are sucked into the next treatment step by negative pressure, preventing incomplete waste gas from escaping. Liquid enters the liquid circulation tank 2 from the bottom end and then re-enters the organic waste gas removal device 5 through the water pump 22, completing the water recycling process.

[0081] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An exhaust gas purification device, characterized in that: include, Circulating water storage tank; Liquid circulation tank; A water filtration system connected to the circulating water storage tank; A bubble generating device connected to the circulating water storage tank; An organic waste gas removal device, the upper end of which is connected to the bubble generating device and the liquid circulation tank at the same time, and the lower end of the organic waste gas removal device is connected to the liquid circulation tank; The organic waste gas removal device comprises a support base, a reaction tank is mounted on the upper end of the support base, a driving motor is mounted on the reaction tank, a first connecting pipe and a second connecting pipe are mounted on the reaction tank, the first connecting pipe is connected to the liquid circulation tank, the second connecting pipe is connected to the bubble generating device, the bottom of the reaction tank and the liquid circulation tank are connected via a third connecting pipe; an air outlet pipe is mounted on the upper end of the reaction tank; A connecting shaft is coaxially arranged on the output shaft of the driving motor, and a guide vane is arranged on the connecting shaft, and the edge of the guide vane is tangent to the inner wall of the reaction tank; A fixed screw is provided in the reaction tank, the fixed screw is arranged at the upper end of the third connecting pipe, and a micro motor is provided between the fixed screw and the third connecting pipe, and a bubble cleaning assembly is provided on the fixed screw; two groups of spiral grooves equidistant from the guide blades are respectively provided on the upper and lower sides of the guide blades on the connecting shaft, and the bubble cleaning assembly is slidably connected to the spiral grooves.

2. The exhaust gas purification device according to claim 1, characterized in that: The bubble cleaning assembly includes a rotating block and a rotating frame, the rotating block is provided with an internal thread, the rotating block is assembled on the fixed screw through the internal thread, the upper and lower planes of the rotating block are provided with inner column cleaning pads; the rotating frame is rotatably assembled at the center of the side wall of the rotating block, and two groups of sliding blocks are assembled on the rotating frame, the two groups of sliding blocks are respectively slidably assembled in the two groups of spiral grooves, and a pair of brush blades are arranged on the inner sides of the two groups of sliding blocks opposite to each other, and brushes are arranged on the brush blades.

3. The exhaust gas purification device according to claim 2, characterized in that: An outer column cleaning pad is coaxially slidably sleeved on the connecting shaft, a rotating shaft is arranged on the outer side surface of the sliding block, a bidirectional retractor is slidably arranged on the rotating shaft, and the bidirectional retractor is embedded in the outer column cleaning pad.

4. The exhaust gas purification device according to claim 1, characterized in that: An exhaust port is arranged at the upper end of the liquid circulation tank, and a water pump is installed at one end of the first connecting pipe connected to the liquid circulation tank.

5. Intelligent printing and dyeing waste gas waste heat utilization and deep treatment equipment, characterized by: It includes a waste heat cascade utilization unit, a spray unit, a composite pulse electrostatic adsorption tower unit, a two-stage high-temperature water dewhitening unit and an exhaust unit which are arranged in sequence along the exhaust gas flow direction, and also includes an oil-water separation box, a sodium chloride electrolysis device and the exhaust gas purification device according to any one of claims 1 to 4, the oil-water separation box is respectively connected to the exhaust gas purification device, the sodium chloride electrolysis device, the composite pulse electrostatic adsorption tower unit, and the waste heat cascade utilization unit, the sodium chloride electrolysis device is connected to the spray unit, wherein the exhaust gas purification device is respectively connected to the spray unit, the composite pulse electrostatic adsorption tower unit and the oil-water separation box.

6. The intelligent printing and dyeing waste gas waste heat utilization and deep treatment equipment according to claim 5 is characterized by: The spray unit includes a micro-bubble water spray device, a hypohalous acid water spray device and a sodium hydroxide water spray device. The micro-bubble water spray device is connected to the bubble generating device in the exhaust gas purification device through a first connecting pipe.

7. The intelligent printing and dyeing waste gas waste heat utilization and deep treatment equipment according to claim 5 is characterized by: The composite pulse electrostatic adsorption tower unit includes a first composite pulse electrostatic adsorption tower and a second composite pulse electrostatic adsorption tower which are connected to each other. The exhaust port of the first composite pulse electrostatic adsorption tower is connected to the air inlet of the second composite pulse electrostatic adsorption tower. The air outlet pipe in the exhaust gas purification device is connected to the air inlet of the second composite pulse electrostatic adsorption tower.

8. The intelligent printing and dyeing waste gas waste heat utilization and deep treatment equipment according to claim 5 is characterized by: The first liquid inlet pipe in the exhaust gas purification device is communicated with the oil-water separation box.

9. The intelligent printing and dyeing waste gas waste heat utilization and deep treatment equipment according to claim 5 is characterized by: The waste heat cascade utilization unit includes a high-temperature gas-to-gas heat exchange device, a medium-temperature gas-to-water heat exchange device and a low-temperature gas-to-gas heat exchange device which are sequentially arranged along the exhaust gas flow direction.

10. The intelligent printing and dyeing waste gas waste heat utilization and deep treatment equipment according to claim 5 is characterized by: It also includes a plurality of alkaline water automatic cleaning devices, which are respectively arranged in the waste heat cascade utilization unit and the composite pulse electrostatic adsorption tower unit.

11. The intelligent printing and dyeing waste gas waste heat utilization and deep treatment equipment according to claim 5 is characterized by: It also includes a plurality of automatic adhesion detection devices, which are respectively arranged in the waste heat step utilization unit and the composite pulse electrostatic adsorption tower unit.

12. The intelligent printing and dyeing waste gas waste heat utilization and deep treatment equipment according to claim 5 is characterized by: The exhaust unit comprises an exhaust pipe, an exhaust fan and a real-time gas monitoring device arranged in the exhaust pipe.

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