Nanofiltration device for industrial waste gas treatment

Abstract

The invention relates to the technical field of waste gas treatment equipment, and discloses a nano-filtration device for industrial waste gas treatment, the nano-filtration device comprises a nano-microbubble device, the nano-microbubble device comprises a treatment cavity and a plurality of spray pipes, a plurality of partition plates are arranged in the treatment cavity, a gap is reserved between one side of each partition plate and the inner wall of the treatment cavity, and the spray pipes are arranged in the treatment cavity. The spraying pipes are in one-to-one correspondence with the notches and are arranged below the notches, spraying heads are arranged on the spraying pipes, collecting boxes and corresponding guiding structures are arranged at the notches, and liquid sprayed out of the spraying pipes flows to the collecting boxes along the guiding structures. The nano-filtration device for industrial waste gas treatment is provided with the nano-microbubble device, the nano-microbubble device is internally provided with a multi-stage nano-microbubble contact cavity, so that nano-microbubbles have sufficient time to be in contact with waste gas, and meanwhile, the waste gas is intercepted by a separation plate and an interception net for multiple times, so that the waste gas can be effectively separated. The nanometer microbubbles and captured substances in the waste gas are timely separated from the waste gas, and the contact probability of the waste gas and the nanometer microbubbles is increased.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas treatment equipment, and in particular to a nanofiltration device for industrial waste gas treatment. Background Art

[0002] Industrial waste gas usually contains dust particles, odor molecules (such as hydrogen sulfide, ammonia) and volatile organic compounds (VOCs), and its treatment has received more and more attention. At present, there are endless means and equipment for treating and purifying industrial waste gas in various forms. Combining filtration with nano-microbubbles is a common way to treat waste gas. In this process, filtration ensures the stable operation of the micro-nano bubble system, and micro-nano bubbles reduce the back-end filtration load and reduce overall energy consumption.

[0003] The nano-microbubble equipment includes a bubble generating device and a spray head. The spray head sprays nano-microbubbles into the exhaust gas. The nanobubbles have high surface tension and can tightly adsorb dust particles, odor molecules (such as hydrogen sulfide, ammonia) and volatile organic compounds (VOCs) in the exhaust gas. When the bubbles burst, the generated active substances such as hydroxyl radicals (·OH) and superoxide ions (O⁻) decompose the pollutants into harmless substances.

[0004] During the spraying process, both the exhaust gas and the nano-microbubbles are in a fast-flowing state, and the time they run in the overlapping motion area is relatively short, making it difficult for the exhaust gas and the nano-microbubbles to fully contact each other.

[0005] Secondly, when the exhaust gas enters the spray area, it will force a part of the bubbles and liquid to flow with the exhaust gas, which will increase the "impurities" in the exhaust gas and reduce the probability of the components that need to be treated in the exhaust gas coming into contact with the nano-microbubbles. Summary of the invention

[0006] The present application proposes a nanofiltration device for industrial waste gas treatment. A multi-stage nano-microbubble contact chamber is provided in the nano-microbubble device, so that the nano-microbubbles have sufficient time to contact with the waste gas. At the same time, the liquid and nano-microbubbles contained in the waste gas are removed in time, so that the nano-microbubbles can work more efficiently.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a nanofiltration device for industrial waste gas treatment, including a nano-micro bubble device, wherein the nano-micro bubble device includes: A processing chamber, wherein a plurality of partitions are arranged in the processing chamber, a gap is left between one side of the partition and the inner wall of the processing chamber, the gap is arranged opposite to the flow direction of the exhaust gas, the gap is located upstream, an air inlet is arranged at the bottom of the processing chamber, an air outlet is arranged at the top of the processing chamber, and an induced draft fan is arranged on the air outlet; A plurality of spray pipes are provided, the spray pipes correspond to the notches one by one and are arranged below the notches. A nozzle is provided on the spray pipe. A collecting box and a corresponding guide structure are provided at the notch. The liquid sprayed from the spray pipe flows to the collecting box along the guide structure. The spray pipe is connected to a nano-micro bubble generator through a venturi tube. The nano-micro bubble generator mixes to form nano-micro bubbles and provides pressure to the liquid rich in nano-micro bubbles so that it is sprayed from the spray pipe. The middle suction port of the venturi tube is connected to the collecting box.

[0008] Furthermore, a filling chamber is provided above the processing chamber, and the filling chamber is filled with activated carbon. When there are trace pollutants that are not completely decomposed in the exhaust gas (such as a small amount of VOCs or odorous substances), the activated carbon adsorbs and deeply purifies the exhaust gas.

[0009] Furthermore, the nozzle on the spray pipe is tilted upward, and the position of the nozzle is biased to one side of the lower edge of the channel. The spray just contacts the upper edge of the channel and flows to the other side in a curved path.

[0010] Furthermore, an interception net is provided in the channel between the two partitions. The interception net is provided on a side close to the spray pipe. The highest point of the interception net is close to the lower side of the spray, thereby reducing the probability of nano-micro bubbles moving with the exhaust gas.

[0011] Furthermore, a separation plate is provided on the notch, and the separation plate separates liquid and particulate matter in the exhaust gas, thereby improving the "purity" of the exhaust gas and enabling the nano-microbubbles to work more efficiently.

[0012] Furthermore, the separation plate includes a mounting frame, on which are provided upper tiles and lower tiles with circular cross-sections. The upper tiles and the mounting frame are arranged horizontally, the upper tiles and the lower tiles have the same radius, the opening of the upper tile faces upward, and the upper tile is inverted on the gap between the two lower tiles, leaving a gap between the upper tile and the lower tile.

[0013] Furthermore, the installation frame is inclined downward, and the side connected to the partition is the higher side. A baffle is provided on the side of the partition close to the notch. The partition is provided with a guide port corresponding to the position of the installation frame, and the liquid gathered on the partition flows to the installation frame through the guide port.

[0014] Furthermore, the mounting frame is provided with a communication opening at a position corresponding to each lower tile, and the communication opening is located at the lowest point of the upper surface of each communication opening.

[0015] Furthermore, an inclined filter is provided in the collection box, and the connecting port between the collection box and the venturi tube is located below the filter. A backwash port is provided below the filter, and the backwash port is connected to a backwash water source. The filter intercepts impurities in the filtered liquid to avoid clogging of the nozzle. At the same time, the filter is kept in a clean state through regular backwashing.

[0016] The beneficial effects of the present invention are as follows: The present application provides a nanofiltration device for industrial waste gas treatment, which is provided with a nano-microbubble device. The nano-microbubble device is provided with a multi-stage nano-microbubble contact chamber, so that the nano-microbubbles have sufficient time to contact with the waste gas, so that the particles and harmful components in the waste gas are effectively treated. At the same time, the spray pipe of the next stage can collect the liquid sprayed from the upper stage in time and spray it again, making full use of the long residence time ability of the nano-microbubbles and improving the utilization rate of the nano-microbubbles.

[0017] The separation plate and the interception net intercept the exhaust gas multiple times, so that the nano-microbubbles and captured substances in the exhaust gas are separated from the exhaust gas in time, increasing the contact probability between the exhaust gas and the nano-microbubbles, and improving the treatment efficiency and effect of the microbubbles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work: Figure 1 It is a front view of the present invention; Figure 2 It is a partial cross-sectional view of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 4 A top view of the present invention; Figure 5 It is a cross-sectional view of the separation plate and the collection box in the present invention; Figure 6 It is a partial side view of the present invention; Figure 7 Schematic diagram of the separation plate in the present invention.

[0019] In the figure: 1, processing chamber; 2, partition; 3, air inlet; 4, air outlet; 5, induced draft fan; 6, spray pipe; 7, venturi tube; 8, nano-micro bubble generator; 9, ozone generator; 10, solid-liquid separator; 11, packing chamber; 12, separation plate; 121, upper tile; 122, lower tile; 123, installation frame; 124, connecting port; 13, collecting box; 14, interception net; 15, guide port; 16, baffle; 17, filter screen; 18, backwash port; 19, reflux port. 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0021] Embodiment 1, as Figure 1-Figure 5 A nanofiltration device for industrial waste gas treatment includes a nano-micro bubble device. The waste gas is filtered by a cyclone dust collector or a bag dust collector and then passes into the nano-micro bubble device. The nano-micro bubble device includes a treatment chamber 1. A plurality of partitions 2 are arranged in the treatment chamber 1. A notch is arranged between one side of the partition 2 and the inner wall of the treatment chamber 1. The adjacent notches are in opposite directions. The partitions 2 and the notches are arranged to form a curved channel in the treatment chamber 1. The notch is arranged in the opposite direction of the waste gas flow. An air inlet 3 is arranged below the treatment chamber 1. The preliminarily filtered waste gas enters through the air inlet 3. In the processing chamber 1, an air outlet 4 is provided at the top of the processing chamber 1, and an induced draft fan 5 is provided on the air outlet 4. The treated waste gas is discharged into the atmosphere from the air outlet 4. The induced draft fan 5 makes the waste gas flowing in the processing chamber 1 have a suitable flow speed. A plurality of spray pipes 6 are provided on the side wall of the processing chamber 1. The spray pipes 6 correspond to the notches one by one and are arranged below the notches. A nozzle is provided on the spray pipe 6. The spray range of the nozzle can completely cover the channel between the two partitions 2 or between the partition 2 and the processing chamber 1, that is, the maximum cross-section of the nozzle is larger than the cross-sectional area of ​​the channel. A collecting box 13 is provided at the notch. The liquid sprayed from the spray pipe 6 flows along the guide structure to the collecting box 13 and is collected. The spray pipe 6 is connected to the nano-micro bubble generator 8 through the venturi tube 7. The nano-micro bubble generator 8 is connected to the ozone generator 9 and the solid-liquid separator 10. The ozone generated by the ozone generator 9 and the liquid provided by the solid-liquid separator 10 enter the nano-micro bubble generator 8. The ozone is peeled and mixed in the nano-micro bubble generator 8 to form nano-micro bubbles, and pressure is provided to the liquid rich in nano-micro bubbles to make it sprayed from the spray pipe 6. The middle part of the venturi tube 7 sucks the ozone generated by the ozone generator 9 and the liquid provided by the solid-liquid separator 10. The inlet is connected to the collecting box 13. The liquid recovered by the collecting box 13 is sucked by the negative pressure generated in the middle of the venturi tube 7. Since the nano-micro bubbles can stay for a long time, the recovered liquid also contains more nano-micro bubbles. The new and old liquids are mixed in the venturi tube 7 and sprayed out, so that the nano-micro bubbles and the exhaust gas can be in more sufficient contact. A packing chamber 11 is provided above the processing chamber 1. The packing chamber 11 is filled with activated carbon. The activated carbon further absorbs the residual harmful components. The solid-liquid separator 10 is connected to the processing chamber 1 through the reflux port 19. The reflux port 19 is provided at the bottom of the processing chamber 1.

[0022] The nozzle on the spray pipe 6 is tilted upward, and the position of the nozzle is biased towards the lower edge of the channel. There is an angle between the nozzle and the horizontal plane, and the angle is 30-60 degrees. The channel height is adaptively adjusted so that the spray just contacts the upper edge of the channel, and the spray path flows to the other side in an arc manner.

[0023] An interception net 14 is provided in the channel between the two partitions 2. The interception net 14 is arranged on a side close to the spray pipe 6. The highest point of the interception net 14 is close to the lower side of the spray. The spray can pass over the interception net 14 without interference. After passing over the interception net 14, the spray height is reduced, and the movement direction of the spray is opposite to that of the exhaust gas. When the nano-microbubbles in the spray capture harmful substances and particles in the exhaust gas, due to the small mass of the nano-microbubbles, they may be carried by the exhaust gas to move in the opposite direction. At this time, due to the reduced height of the nano-microbubbles, they may collide with the interception net 14, be captured by the interception net 14, and flow along the partition 2 to the collection box 13, reducing the probability of the nano-microbubbles moving with the exhaust gas. The interception net 14 is configured to be a mesh to facilitate the passage of the exhaust gas.

[0024] The notch is provided with a separation plate 12 , which separates liquid and particulate matter in the exhaust gas, making the exhaust gas relatively “pure” and enabling the exhaust gas to better contact with the nano-micro bubbles sprayed from the upper-level spray pipe 6 .

[0025] See also Figure 5-Figure 7 The separation plate 12 includes a mounting frame 123. One end of the collection box 13 is fixedly connected to the partition 2, and the other three sides are fixedly connected to the processing chamber 1. The mounting frame 123 is provided with an upper tile 121 and a lower tile 122 with a circular cross section. The upper tile 121 and the mounting frame 123 are arranged horizontally. Figure 5 , horizontal refers to the direction perpendicular to the paper surface, the upper tile 121 and the lower tile 122 have the same radius, the upper tile 121 and the lower tile 122 have openings facing each other, and the upper tile 121 is inverted on the gaps between the two lower tiles 122. There is a gap between the upper tile 121 and the lower tile 122, and the two are not actually in contact. When the exhaust gas flows to the separation plate 12 at a certain speed, under the guidance of the upper tile 121 and the lower tile 122, the direction is changed at a large angle for many times. Under the action of inertia and centrifugal force, the heavier liquid in the exhaust gas and the particles captured and gathered by the bubbles are thrown onto the separation plate 12 and separated from the gas. At the same time, part of the liquid sprayed from the upper-level spray pipe 6 will also fall on the upper tile 121, forming a water curtain on the upper tile 121, and nano-micro bubbles are easily captured by the water curtain, further increasing the "purity" of the exhaust gas.

[0026] The installation frame 123 is inclined downward, and the side connected to the partition 2 is the higher side. The partition 2 is provided with a baffle 16 on the side close to the notch. The partition 2 is provided with a guide port 15 at a position corresponding to the installation frame 123. The liquid gathered by the partition 2 flows to the installation frame 123 through the guide port 15, and flows to the collection box 13 through the installation frame 123. The guide structure is composed of the partition 2, the baffle 16, the guide port 15 and the installation frame 123.

[0027] The mounting frame 123 is provided with a connecting port 124 corresponding to the position of each lower tile 122 . The connecting port 124 is located at the lowest point of the upper surface of each connecting port 124 . The liquid gathered in the connecting port 124 flows into the mounting frame 123 through the connecting port 124 and finally flows to the collecting box 13 .

[0028] An inclined filter screen 17 is provided in the collection box 13. The connecting port between the collection box 13 and the venturi tube 7 is located below the filter screen 17. A backwash port 18 is provided below the filter screen 17. The backwash port 18 is connected to a backwash water source. The filter screen 17 intercepts impurities in the filtered liquid to avoid nozzle clogging. At the same time, the filter screen 17 is kept in a clean state through regular backwashing.

[0029] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A nanofiltration device for industrial waste gas treatment, comprising a nano-micro bubble device, characterized in that: The nano-micro bubble device comprises: A processing chamber (1), wherein a plurality of partitions (2) are arranged in the processing chamber (1), a gap is left between one side of the partition (2) and the inner wall of the processing chamber (1), the gap is arranged upstream in the direction opposite to the flow direction of the exhaust gas, an air inlet (3) is arranged at the bottom of the processing chamber (1), an air outlet (4) is arranged at the top of the processing chamber (1), and an induced draft fan (5) is arranged on the air outlet (4); A plurality of spray pipes (6), the spray pipes (6) corresponding to the notches one by one and arranged below the notches, a spray head being arranged on the spray pipes (6), a collecting box (13) and a corresponding guide structure being arranged at the notches, liquid sprayed from the spray pipes (6) flowing along the guide structure to the collecting box (13), the spray pipes (6) being connected to a nano-micro bubble generator (8) via a venturi tube (7), the nano-micro bubble generator (8) mixing to form nano-micro bubbles and providing pressure to the liquid rich in nano-micro bubbles so that the liquid is sprayed from the spray pipes (6), and a suction port in the middle of the venturi tube (7) being connected to the collecting box (13).

2. The nanofiltration device for industrial waste gas treatment according to claim 1, characterized in that: A filling chamber (11) is provided above the processing chamber (1), and the filling chamber (11) is filled with activated carbon.

3. The nanofiltration device for industrial waste gas treatment according to claim 1, characterized in that: The nozzle on the spray pipe (6) is tilted upward, and the angle between the spray direction and the horizontal plane is 30-60 degrees. The nozzle is positioned toward the lower edge of the channel, and the spray just contacts the upper edge of the channel and flows to the other side in a curved path.

4. The nanofiltration device for industrial waste gas treatment according to claim 3, characterized in that: The passage between the two partitions (2) is provided with an interception net (14), which is arranged on a side close to the spray pipe (6), and the highest point of the interception net (14) is close to the lower side of the spray.

5. The nanofiltration device for industrial waste gas treatment according to claim 1, characterized in that: A separation plate (12) is provided on the notch, and the separation plate (12) separates liquid and particulate matter from the exhaust gas.

6. The nanofiltration device for industrial waste gas treatment according to claim 1, characterized in that: The separation plate (12) comprises a mounting frame (123), on which an upper tile (121) and a lower tile (122) having a circular cross section are provided, the upper tile (121) and the mounting frame (123) being arranged transversely, the upper tile (121) and the lower tile (122) having the same radius, the opening of the upper tile (121) facing upward, and the upper tile (121) being inverted on a gap between two lower tiles (122), with a gap being left between the upper tile (121) and the lower tile (122).

7. The nanofiltration device for industrial waste gas treatment according to claim 6, characterized in that: The installation frame (123) is inclined downward, and the side connected to the partition (2) is a higher side. A baffle (16) is provided on the side of the partition (2) close to the notch. A guide port (15) is provided at a position of the partition (2) corresponding to the installation frame (123), and liquid collected on the partition (2) flows toward the installation frame (123) through the guide port (15).

8. The nanofiltration device for industrial waste gas treatment according to claim 7, characterized in that: The installation frame (123) is provided with a communication opening (124) at a position corresponding to each lower tile (122), and the communication opening (124) is located at the lowest point of the upper surface of each communication opening (124).

9. The nanofiltration device for industrial waste gas treatment according to claim 1, characterized in that: An inclined filter screen (17) is provided in the collection box (13); a communication port between the collection box (13) and the venturi tube (7) is located below the filter screen (17); a backwash port (18) is provided below the filter screen (17); and the backwash port (18) is connected to a backwash water source.

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