Soft porcelain drying waste gas recovery system

Abstract

The utility model discloses a soft porcelain drying waste gas recovery system which comprises a waste gas collection cover used for collecting waste gas generated by a soft porcelain drying device; the input end of the particle prefilter is communicated with the output end of the waste gas collecting cover, a filter screen is arranged in the particle prefilter, and a cleaning mechanism used for cleaning the filter screen is arranged in the particle prefilter; the input end of the spray washing unit is communicated with the output end of the prefilter; the input end of the photolysis adsorption unit is communicated with the output end of the spray washing unit; the input end of the waste liquid recovery treatment unit is communicated with the waste water output end of the spray washing unit, and the output end of the waste liquid recovery treatment unit is communicated with the input end of the cleaning mechanism. The particle prefilter disclosed by the utility model can be used for prefiltering material particles contained in waste gas, and can be used for cleaning the filter screen by using spraying and washing waste water again.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas recovery, in particular to a soft porcelain drying waste gas recovery system. Background Art

[0002] In the production process of soft porcelain, drying is an important process step. The mold with the slurry and fiber mesh laid on it is transported to the inside of the drying equipment, and then hot air is used to heat, dry and shape the fiber mesh and slurry. However, the exhaust gas generated during the drying process contains pollutants such as material particles, dust, odor and organic matter, so the exhaust gas needs to be recovered and treated before it can be discharged. The prior art with patent number CN113413699B discloses an injection molding exhaust gas recovery system, which is provided by setting a filter screen inside the smoke inlet pipe and a collection tank at one end of the bottom of the smoke inlet pipe. The filter screen is used to filter large particles in the exhaust gas entering the smoke inlet pipe, and the collection tank can be used to collect these particles. However, due to the small inner diameter of the pipe and after a period of filtration, particles are prone to blocking the filter screen, causing the exhaust gas circulation speed to slow down, affecting the recovery and treatment of the exhaust gas. Summary of the Invention

[0003] The utility model aims to solve at least one of the technical problems mentioned above and provides a soft porcelain drying waste gas recovery system, in which the particle pre-filter can pre-filter the material particles contained in the waste gas and can reuse the spray washing waste water to clean the filter.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A soft porcelain drying waste gas recovery system includes a waste gas collection hood for collecting waste gas generated by a soft porcelain drying device; a particle pre-filter, whose input end is connected to the output end of the waste gas collection hood, a filter screen is provided inside the particle pre-filter, and a cleaning mechanism for cleaning the filter screen is provided inside the particle pre-filter; a spray washing unit, whose input end is connected to the output end of the pre-filter; a photodesorption unit, whose input end is connected to the output end of the spray washing unit; a waste liquid recovery and treatment unit, whose input end is connected to the wastewater output end of the spray washing unit, and the output end of the waste liquid recovery and treatment unit is connected to the input end of the cleaning mechanism.

[0006] As an improvement of the above technical solution, the waste liquid recovery and processing unit includes a waste liquid tank and a waste liquid treatment device. The input end of the waste liquid tank is connected to the wastewater output end of the spray washing unit, the input end of the waste liquid treatment device is connected to the output end of the waste liquid tank, and the output end is connected to the cleaning mechanism.

[0007] As an improvement of the above technical solution, the particle pre-filter includes a filter box, the input end of the filter box is connected to the output end of the exhaust gas collection cover, the filter screen is arranged inside the filter box, and a particle recovery chamber is provided on the bottom of the filter box and at the position of the filter screen input end. The cleaning mechanism is arranged inside the filter box and at the upper end of the filter screen.

[0008] As an improvement of the above technical solution, the cleaning mechanism includes a water pipe, which is arranged inside the filter box and located at the upper end of the filter net. The output end of the waste liquid treatment device is connected to the input end of the water pipe, and the water pipe is connected to several flushing heads.

[0009] As an improvement of the above technical solution, the input end of the filter box is connected to a speaker air inlet pipe, and the inner diameter of the speaker air inlet pipe is gradually increased from the outward end to the input end of the filter box.

[0010] As an improvement of the above technical solution, the spray washing unit includes an alkali washing tower and a water washing tower. The input end of the alkali washing tower is connected to the output end of the pre-filter, and the input end of the water washing tower is connected to the output end of the alkali washing tower. The wastewater output ends of the alkali washing tower and the water washing tower are both connected to the waste liquid tank.

[0011] As an improvement to the above technical solution, demisters are provided on the upper ends of the alkali washing tower and the water washing tower.

[0012] As an improvement of the above technical solution, the photodecomposition and adsorption unit includes a UV photolysis device and an activated carbon adsorption device, the input end of the UV photolysis device is connected to the output end of the water washing tower, and the input end of the activated carbon adsorption device is connected to the output end of the UV photolysis device.

[0013] As an improvement of the above technical solution, the output end of the activated carbon adsorption device is connected to a fan, and the output end of the fan is connected to a smoke exhaust tower.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] The utility model provides a waste gas recovery system for soft porcelain drying, which first pre-treats the waste gas through a particle pre-filter, and can filter out large particulate matter such as material particles brought out by the waste gas during the soft porcelain drying process, and then removes soluble gases, dust, smoke and other particulate matter in the waste gas through a spray washing unit, and finally further removes organic matter and odor in the waste gas through a photodesorption unit, and discharges the waste gas after effectively removing the pollutants; in addition, the washing waste liquid generated in the spray washing process can be transmitted to the cleaning mechanism after passing through the waste liquid recovery and treatment unit, and is used to clean the filter screen to prevent the filter screen from being blocked, thereby achieving the purpose of waste liquid recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following is a further detailed description of the specific embodiments of the present invention with reference to the accompanying drawings, wherein:

[0017] Figure 1 The system structure of the embodiment of the utility model is shown as follows Figure 1 ;

[0018] Figure 2 The system structure of the embodiment of the utility model is shown as follows Figure 2 ;

[0019] Figure 3 It is a schematic structural diagram of the particle pre-filter in an embodiment of the present utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. When a component is referred to as being "set in the middle", it does not only mean being set in the exact middle position, but also means being within the range defined by the middle as long as both ends are not set. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] like Figures 1 to 3As shown, the present invention provides a soft porcelain drying waste gas recovery system, comprising a waste gas collection hood 100 for collecting waste gas generated by the soft porcelain drying device; a particle pre-filter 200, whose input end is connected to the output end of the waste gas collection hood 100, wherein the particle pre-filter 200 is provided with a filter 210 inside, and a cleaning mechanism 220 for cleaning the filter 210 inside the particle pre-filter 200; a spray washing unit 300, whose input end is connected to the output end of the pre-filter 200; a photodesorption unit 400, whose input end is connected to the output end of the spray washing unit 300; and a waste liquid recovery unit 500, whose input end is connected to the waste water output end of the spray washing unit 300, wherein the output end of the waste liquid recovery unit 500 is connected to the input end of the cleaning mechanism 220. The waste gas collection hood 100 can be mounted on the top of the soft porcelain dryer to collect waste gas generated during the drying process. Existing waste gas collection hoods can be used, and this application will not describe them in detail.

[0024] In a specific embodiment of the present application, the waste liquid recovery and treatment unit 500 includes a waste liquid tank 510 and a waste liquid treatment device 520. The input end of the waste liquid tank 510 is connected to the waste water output end of the spray washing unit 300, and the input end of the waste liquid treatment device 520 is connected to the output end of the waste liquid tank 510, and the output end is connected to the cleaning mechanism 220. The waste liquid tank 510 is used to collect waste water discharged from the spray washing unit 300; the waste liquid treatment device 520 is used to precipitate, adsorb and filter the recovered waste liquid to remove particulate matter and harmful substances in the waste liquid. Specifically, the waste liquid treatment device 520 is a prior art and can include a sedimentation tank, a neutralization tank, a flocculation tank, etc. The waste liquid first enters the sedimentation tank to remove most of the particulate matter, then enters the neutralization tank to adjust the pH value, and then adds a flocculant to react in the flocculation tank to separate the formed flocs to improve the water quality of the waste liquid. It can be recycled or enter the cleaning mechanism 220 for filter cleaning.

[0025] See also Figure 3In a specific embodiment of the present application, the particle pre-filter 200 includes a filter box 230, the input end of which is connected to the output end of the exhaust gas collection cover 100. The filter screen 210 is disposed inside the filter box 230. A particle recovery chamber 231 is provided on the bottom of the filter box 230, located at the input end of the filter screen 210. The cleaning mechanism 220 is disposed inside the filter box 230, located at the upper end of the filter screen 210. The filter screen 210 can filter out large particulate matter such as material particles in the exhaust gas, and the particles fall and are collected in the particle recovery chamber 231. Specifically, the cleaning mechanism 220 includes a water pipe 221, which is disposed inside the filter box 230 and located at the upper end of the filter screen 210. The output end of the waste liquid sedimentation filter 520 is connected to the input end of the water pipe 221, and the water pipe 221 is connected to a plurality of flushing heads 222. The water pipes 221 may be provided in two groups, and installed on both sides of the filter 210 respectively, so as to spray water to clean both sides of the filter 210 .

[0026] Furthermore, the input end of the filter box 230 is connected to a trumpet air inlet pipe 232. The inner diameter of the trumpet air inlet pipe 232 gradually increases from the outward end toward the input end of the filter box 230. When the exhaust gas passes through the trumpet air inlet pipe 232 with a gradually increasing inner diameter, the airflow will be able to pass through the filter screen 210 smoothly and slowly, ensuring the filtration effect.

[0027] In a specific embodiment of the present application, the spray washing unit 300 includes an alkali washing tower 310 and a water washing tower 320. The input end of the alkali washing tower 310 is connected to the output end of the pre-filter 200, and the input end of the water washing tower 320 is connected to the output end of the alkali washing tower 310. The wastewater output ends of the alkali washing tower 310 and the water washing tower 320 are both connected to the waste liquid tank 510. The alkali washing tower 310 and the water washing tower 320 are both equipped with spray pipes, which are connected to the alkali washing liquid and the water washing liquid input pipes. The alkali washing and water washing are used to remove acidic harmful substances and dust particles in the exhaust gas. Furthermore, to remove water mist from the exhaust gas, the upper ends of the alkali washing tower 310 and the water washing tower 320 are each equipped with a demister 330. The demister 330 can be a corrugated bent plate to intercept and remove water mist.

[0028] In a specific embodiment of the present application, the photodesorption unit 400 includes a UV photolysis device 410 and an activated carbon adsorption device 420. The input of the UV photolysis device 410 is connected to the output of the water scrubber 320, while the input of the activated carbon adsorption device 420 is connected to the output of the UV photolysis device 410. The UV photolysis device 410 is conventional technology and contains a UV lamp that emits a high-energy UV ultraviolet beam, which decomposes organic waste gas and malodorous gases under the irradiation of the ultraviolet light, transforming them into low-molecular compounds. The activated carbon adsorption device 420 contains an activated carbon layer that absorbs odors and other substances from the waste gas. To ensure the smooth discharge of treated waste gas, the output of the activated carbon adsorption device 420 is connected to a fan 600, and the output of the fan 600 is connected to a smoke exhaust tower 700.

[0029] The utility model provides a waste gas recovery system for soft porcelain drying. First, the waste gas is pre-treated by a particle pre-filter 200, which can filter out large particulate matter such as material particles brought out by the waste gas during the soft porcelain drying process. Then, the soluble gas, dust, smoke and other particulate matter in the waste gas are removed by a spray washing unit 300. Finally, the organic matter and odor in the waste gas are further removed by a photodesorption unit 400, and the pollutants are effectively removed before being discharged. In addition, the washing waste liquid generated in the spray washing process can be transmitted to the cleaning mechanism 220 after passing through the waste liquid recovery and processing unit 500 for cleaning the filter screen 210 to prevent the filter screen from being blocked, thereby achieving the purpose of waste liquid recycling.

[0030] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be included in the scope of the technical solution of the present invention.

Claims

1. A soft porcelain drying waste gas recovery system, characterized in that: include Exhaust gas collection hood, used to collect exhaust gas generated by the soft porcelain drying device; a particle pre-filter, the input end of which is connected to the output end of the exhaust gas collection cover, the interior of the particle pre-filter is provided with a filter screen, and the interior of the particle pre-filter is provided with a cleaning mechanism for cleaning the filter screen; a spray washing unit, the input end of which is connected to the output end of the pre-filter; a photodesorption unit, the input end of which is connected to the output end of the spray washing unit; The input end of the waste liquid recovery and processing unit is connected to the waste water output end of the spray washing unit, and the output end of the waste liquid recovery and processing unit is connected to the input end of the cleaning mechanism.

2. A soft porcelain drying waste gas recovery system according to claim 1, characterized in that: The waste liquid recovery and processing unit includes a waste liquid tank and a waste liquid treatment device. The input end of the waste liquid tank is connected to the waste water output end of the spray washing unit. The input end of the waste liquid treatment device is connected to the output end of the waste liquid tank, and the output end is connected to the cleaning mechanism.

3. A soft porcelain drying waste gas recovery system according to claim 2, characterized in that: The particle pre-filter includes a filter box, the input end of the filter box is connected to the output end of the exhaust gas collection cover, the filter screen is arranged inside the filter box, a particle recovery chamber is provided on the bottom of the filter box and at the position of the filter screen input end, and the cleaning mechanism is arranged inside the filter box and at the upper end of the filter screen.

4. A soft porcelain drying waste gas recovery system according to claim 3, characterized in that: The cleaning mechanism includes a water pipe, which is arranged inside the filter box and located at the upper end of the filter screen. The output end of the waste liquid treatment device is connected to the input end of the water pipe, and the water pipe is connected to a plurality of flushing heads.

5. The soft porcelain drying waste gas recovery system according to claim 3 is characterized in that: The input end of the filter box is connected to a horn air inlet pipe, and the inner diameter of the horn air inlet pipe is gradually increased from the outward end to the input end of the filter box.

6. A soft porcelain drying waste gas recovery system according to claim 2, characterized in that: The spray washing unit includes an alkali washing tower and a water washing tower. The input end of the alkali washing tower is connected to the output end of the pre-filter, the input end of the water washing tower is connected to the output end of the alkali washing tower, and the wastewater output ends of the alkali washing tower and the water washing tower are both connected to the waste liquid tank.

7. A soft porcelain drying waste gas recovery system according to claim 6, characterized in that: Demisters are provided on the upper ends of the alkali washing tower and the water washing tower.

8. The soft porcelain drying waste gas recovery system according to claim 6, characterized in that: The photodecomposition and adsorption unit includes a UV photolysis device and an activated carbon adsorption device. The input end of the UV photolysis device is connected to the output end of the water washing tower, and the input end of the activated carbon adsorption device is connected to the output end of the UV photolysis device.

9. A soft porcelain drying waste gas recovery system according to claim 8, characterized in that: The output end of the activated carbon adsorption device is connected to a fan, and the output end of the fan is connected to a smoke exhaust tower.

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