Spraying and filtering treatment device for artificial leather foaming waste gas

Abstract

The invention relates to a spraying and filtering treatment device for artificial leather foaming waste gas. The spraying and filtering treatment device comprises a box body, a circulating water tank, a water pump located in the circulating water tank, a spraying device and a water-oil separation partition plate, wherein the spraying device and the water-oil separation partition plate are arranged in the box body; the spraying device is connected with the water pump, washing liquid is added into the circulating water tank, and the spraying device and the water-oil separation partition plate are arranged front and back in parallel in the gas conveying direction. The spraying and filtering treatment device disclosed by the invention can effectively adsorb harmful gas, grease and the like in artificial leather foaming waste gas through optimization design and extension of a gas path, and can effectively purify the waste gas, adsorb polluted gas and realize water-oil separation. By matching with proper detergent components, oil stains can be effectively removed, the oil stains are prevented from gathering and blocking spray holes, the cost is low, most of the reagents are inorganic reagents, the post-treatment is easy, and the maintenance and operation cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of artificial leather foaming waste gas treatment, in particular to an artificial foaming waste gas spraying and filtering treatment device. Background Art

[0002] When PVC artificial leather is baked in a high-temperature foaming furnace, the raw materials such as resin, plasticizer, and foaming agent are used. When baked in a high-temperature foaming furnace, the temperature of the foaming furnace is usually 200-220°C. Chemical reactions will occur between the raw materials to produce new gas substances. Some raw materials will undergo thermal degradation at high temperatures, producing gaseous organic pollutants such as hydrocarbons and benzene series, forming oil-containing high-temperature waste gas. The main components of the waste gas include: plasticizers, plasticizer decomposition products (phthalic anhydride, alcohols, esters), and hydrogen chloride produced by the decomposition of PVC resin at high temperatures. Compared with ordinary restaurant fume exhaust gas, the temperature of artificial leather foaming exhaust gas is high, the exhaust gas is highly acidic (mainly containing a large amount of phthalic anhydride and a small amount of hydrogen chloride), and the odor is strong (phthalic anhydride). The temperature of the fume in the exhaust gas is about 130°C. The characteristics of foaming exhaust gas are high temperature and high concentration.

[0003] The common waste gas treatment systems currently used mostly adopt electrostatic adsorption. After treatment, the content of harmful gas components in the exhaust gas is relatively high. Therefore, it is urgent to develop a treatment device for artificial leather foaming waste gas. Summary of the invention

[0004] In view of the above-mentioned current technical deficiencies, the present invention provides a spray filtering treatment device for artificial leather foaming waste gas.

[0005] The invention discloses a spraying, filtering and treating device for artificial leather foaming waste gas, comprising a box body, a circulating water tank, a water pump located in the circulating water tank, and a spraying device and a water-oil separation baffle arranged in the box body; the spraying device is connected to the water pump, washing liquid is added to the circulating water tank, and the spraying device and the water-oil separation baffle are arranged in parallel front and back along the gas conveying direction.

[0006] The detergent in the spray liquid is used to absorb and neutralize pollutants and grease in the gas, and then the water and oil are separated by the partition. Moreover, the spray device and the water-oil separation partition are arranged in parallel along the gas transmission direction, changing the traditional structure of upper spray and lower partition for water-oil separation, which can lengthen the separation path, so that the fluid micro-groups are constantly mixed and collided in the space, which helps the gas and the detergent to mix more fully, and improve the reaction rate and removal efficiency. Due to inertia, the oil pollutants in the exhaust gas will adhere to the surface of the water-oil separation partition. As the exhaust gas continues to pass, the oil droplets on the partition will gradually gather into larger oil droplets, and finally drip to the bottom of the box due to gravity. In addition, some oil pollutants will form a thin oil film on the surface of the partition, which can further capture and separate the oil pollutants in the exhaust gas.

[0007] Preferably, the box body is evenly divided into the first zone, the second zone, the third zone, the fourth zone and the fifth zone in the direction of gas delivery, the gas is inlet from the bottom of the first zone and exhaust from the top of the fifth zone, the first zone and the second zone have the same height, which is H1, the third zone, the fourth zone and the fifth zone have the same height, which is H2, and H1>H2, the spray device is arranged on the upper part of the first zone; the water-oil separation partition is vertically arranged at the junction of each zone alternately up and down; the water-oil separation partition is composed of a number of interlocking open grooves. The gas delivery distance can be further extended, and the adsorption reaction is better.

[0008] Preferably, the spray device has multiple stages to improve the spray range and washing efficiency.

[0009] Preferably, the cross section of the open groove is in the shape of an arc, and the angle of the arc is 80 to 120°, which has a better oil-water separation effect.

[0010] Preferably, the height of the water-oil separation partition is h, H1:H2=1.5~2:1, h:H2=1 / 2~1 / 3:1.

[0011] Preferably, the washing liquid is composed of 0.02% to 0.1% peregrin, 1% to 5% sodium sulfate, 1% to 2% sodium hydroxide, and the balance of water, according to weight percentage, and the pH is 8-12. Among them, sodium hydroxide is an acid neutralizer, which is used to react with acids and anhydrides in the exhaust gas to produce salts and degrade esters in the exhaust gas. As a strong base, sodium hydroxide can provide sufficient hydroxide ions (OH-) to react with ester groups (COO-) in ester molecules to generate corresponding alcohols and carboxylates. This reaction process helps to convert ester pollutants in the exhaust gas into harmless substances. Peregrin is a surfactant that can reduce surface tension and make the spray liquid more easily penetrate into the surface of oil droplets; secondly, it plays an emulsifying and dispersing role to evenly disperse the oil droplets in the spray liquid; finally, it has a solubilizing effect to stably dissolve the oil droplets in water. As an adsorbent, sodium sulfate can effectively adsorb on the surface of fine oil particles to prevent oil from agglomerating, polluting equipment, and clogging spray holes. The three interact with each other to reduce the amount of sodium hydroxide used, effectively remove the oil in the artificial leather foaming waste gas, and prevent the oil from accumulating and blocking the spray hole. Moreover, the cost is low, and most of them are inorganic reagents, so the post-processing is easy.

[0012] Preferably, a float valve is provided in the circulating water tank. When the liquid level in the water tank drops, the float drops along with the liquid level, and when it drops to a certain position, the valve core opens the valve body, allowing the washing liquid to flow into the water tank to replenish the washing liquid in the water tank.

[0013] Preferably, the circulating water tank is arranged below the tank body to reduce the volume of the equipment and make the center of gravity more stable.

[0014] Preferably, the circulating water tank is an open water tank, which is convenient for observing and replacing the washing liquid.

[0015] Preferably, a fence is provided on the top of the box to facilitate inspection.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The spray filter device of the present invention has an optimized design and a prolonged gas path, and can effectively absorb harmful gases, grease, etc. in the artificial leather foaming waste gas, can effectively purify the waste gas, absorb polluted gases, and achieve water-oil separation. Moreover, by combining appropriate detergent components, it can effectively remove oil stains, and prevent oil stains from accumulating and blocking the spray holes. The cost is low, and most of the reagents are inorganic, so the post-processing is easy, and the maintenance and operation costs are low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the artificial leather foaming waste gas spray filtering device according to an embodiment of the present invention;

[0019] Figure 2 A cross-sectional view of a spray filtering device for artificial leather foaming waste gas according to an embodiment of the present invention;

[0020] Figure 3 AA view of the artificial leather foaming waste gas spray filtering device according to an embodiment of the present invention;

[0021] Figure 4 BB view of the artificial leather foaming waste gas spray filtering device according to an embodiment of the present invention;

[0022] Figure 5 Schematic diagram of a water-oil separation partition according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described below with reference to specific embodiments and drawings, but the embodiments do not limit the present invention in any form.

[0024] refer to Figure 1-5 The present invention provides a spray filtering device 1 for artificial leather foaming waste gas, comprising a box body 11, a circulating water tank 12, a water pump 16 located in the circulating water tank, and a spray device 14 and a water-oil separation partition 13 arranged in the box body. The spray device 14 is connected to the water pump 15. Washing liquid is added to the circulating water tank 12. According to the gas flow direction, the water-oil separation partition 13 and the spray device 14 are arranged in parallel and located behind the spray device 14; in this way, the pollutant components in the spray adsorbed gas are first sprayed and adsorbed, and then the water and oil are separated, and finally discharged through the exhaust port 15.

[0025] The spray device 14 and the water-oil separation partition 13 have changed the traditional structural design of spraying on the top and separating water and oil on the partition below. Instead, they are arranged in parallel front and back along the gas delivery direction. After the rising flue gas enters the main box, it is first sprayed, adsorbed and sunk, and then needs to rise before entering the water-oil separation partition, rather than the traditional direct spraying and then sinking into the water-oil separation partition. This lengthens the separation path, allowing the fluid micro-groups to continuously mix and collide in space, which helps the pollutants in the exhaust gas to mix more fully with the washing liquid, thereby improving the reaction rate and removal efficiency. The oil pollutants in the exhaust gas will adhere to the surface of the partition due to inertia. As the exhaust gas continues to pass, the oil droplets on the partition will gradually gather into larger oil droplets, and eventually drip to the bottom of the box due to gravity. In addition, some oil pollutants will also form a thin oil film on the surface of the partition, which can further capture and separate the oil pollutants in the exhaust gas.

[0026] The circulating water tank 12 is arranged below the box body 11, which reduces the volume of the equipment and makes the center of gravity more stable. In addition, the circulating water tank 12 is an open water tank, which is convenient for observing and replacing the washing liquid.

[0027] In order to better monitor the liquid level, a float valve is provided in the circulating water tank 12. When the liquid level in the water tank drops, the float drops with the liquid level, and when it drops to a certain position, the valve core opens the valve body, allowing the washing liquid to flow into the water tank to replenish the washing liquid in the water tank.

[0028] A fence is also provided on the top of the box body 11 to facilitate inspection.

[0029] About the washing liquid in the circulating water tank

[0030] In view of the composition of artificial leather foaming waste gas, the present invention also optimizes the composition of the washing liquid in the circulating water tank 12. The main components of artificial leather foaming waste gas include: plasticizer, plasticizer decomposition products (phthalic anhydride, alcohols, esters), and hydrogen chloride produced by the decomposition of PVC resin at high temperature. Therefore, the washing liquid is alkaline, with a pH of 8-12, and generally includes a surfactant, an adsorbent and an acid neutralizer.

[0031] Common acid adsorbents include various alkalis, sodium carbonate, sodium hydroxide, adsorbents such as sodium carbonate, calcium carbonate, calcium sulfate, etc.; surfactants can be selected from Pingpingjia, etc.

[0032] In one embodiment of the present invention, the following schemes are compared:

[0033] Solution 1: The washing liquid consists of 0.05% Perigax-8, 2% sodium sulfate, 1.5% sodium hydroxide, and the balance water, with a pH of 8-12.

[0034] Solution 2: The washing liquid consists of 0.05% Perigax-8, 2% sodium sulfate, 3% sodium carbonate, and the balance water, with a pH of 8-12.

[0035] Scheme 3: The washing solution consists of 0.05% Perigax-8, 3% calcium sulfate, 2% sodium hydroxide, and the balance water, with a pH of 8-12.

[0036] In a confined space, the spray device sprays cleaning liquids of different formulas, collects the pollutant content in the gas before the test spray, and collects the pollutant content in the gas after the test spray. Compare and compare the adsorption effects of different cleaning liquids. The test results are shown in Table 1.

[0037] Table 1 Comparison of the effects of different detergents

[0038]

[0039] Structural optimization of spray filtration device

[0040] In the embodiment of the present invention, the water-oil separator 53 and the spray device 54 are arranged in parallel according to the gas flow direction, but the specific dimensions need to be further optimized.

[0041] In one embodiment of the present invention, the detergent of scheme 1 in the above-mentioned washing liquid experiment is used to compare the following schemes:

[0042] Solution 1: The box body 11 is evenly divided into the first zone, the second zone, the third zone, the fourth zone and the fifth zone in the direction of gas delivery. The air is taken in from the bottom of the first zone, and the exhaust port 15 is provided at the top of the fifth zone. The first zone and the second zone have the same height, which is H1, and the third zone, the fourth zone and the fifth zone have the same height, which is H2. The spray device 54 is arranged on the upper part of the first zone and has two levels. The water-oil separation partition 13 is arranged vertically at the junction of each zone alternately up and down. The water-oil separation partition 13 is composed of a number of interlocking open grooves. The cross section of the open groove is in the shape of an arc, and the angle of the arc is 100°. The height of the water-oil separation partition is h, H1:H2=1.5:1, h:H2=1 / 2.

[0043] Solution 2: The box body 11 is evenly divided into the first zone, the second zone, the third zone, the fourth zone and the fifth zone in the gas delivery direction. The first zone and the second zone have the same height, which is H1, and the third zone, the fourth zone and the fifth zone have the same height, which is H2. The spray device 14 is arranged on the upper part of the first zone and has two levels; the water-oil separation partition is arranged vertically at the junction of each zone alternately up and down; the water-oil separation partition 13 is composed of a number of interlocking open grooves. The cross section of the open groove is arc-shaped, the angle of the arc is 100°, and the height of the water-oil separation partition is h, H1:H2=2:1, h:H2=1 / 2.

[0044] Solution 3: The box body 11 is evenly divided into the first zone, the second zone, the third zone, the fourth zone and the fifth zone in the direction of gas delivery. The first zone and the second zone have the same height, which is H1, and the third zone, the fourth zone and the fifth zone have the same height, which is H2. The spray device 14 is arranged on the upper part of the first zone and has 2 levels; the water-oil separation partition is arranged vertically at the junction of each zone alternately up and down; the water-oil separation partition 13 is composed of a number of interlocking open grooves. The cross section of the open groove is arc-shaped, and the angle of the arc is 100°. The water-oil separation efficiency is higher. The height of the water-oil separation partition is h, H1:H2=3:1, h:H2=1 / 2.

[0045] Solution 4: The box body 11 is evenly divided into the first zone, the second zone, the third zone, the fourth zone and the fifth zone along the gas delivery direction. The first zone and the second zone have the same height, which is H1, and the third zone, the fourth zone and the fifth zone have the same height, which is H2. The spray device 14 is arranged on the upper part of the first zone and has 2 levels; the water-oil separation partition 13 is vertically arranged alternately up and down at the junction of each zone; the water-oil separation partition 13 is composed of a number of interlocking open grooves. The cross-section of the open groove is arc-shaped, and the angle of the arc is 150°. The water-oil separation efficiency is higher. The height of the water-oil separation partition is h, H1:H2=2:1, h:H2=1 / 2.

[0046] Scheme 5: The box body 11 is evenly divided into the first zone, the second zone, the third zone, the fourth zone and the fifth zone in the direction of gas delivery. The first zone and the second zone have the same height, which is H1, and the third zone, the fourth zone and the fifth zone have the same height, which is H2. The spray device 14 is arranged on the upper part of the first zone and has 2 levels; the water-oil separation partition 13 is vertically arranged alternately up and down at the junction of each zone; the water-oil separation partition 13 is composed of a number of interlocking open grooves. The cross section of the open groove is arc-shaped, and the angle of the arc is 60°. The water-oil separation efficiency is higher. The height of the water-oil separation partition 13 is h, H1:H2=2:1, h:H2=1 / 2.

[0047] The gas particulate matter and pollutant content at the exhaust port 15 were detected respectively, and the capture effects of different schemes were compared. The results are shown in Table 3.

[0048] Table 2 Comparison of exhaust gas after spray filtration in different schemes

[0049]

[0050]

[0051] In summary, it can be seen that when H1:H2=1.5~2:1, h:H2=1 / 2, and the angle of the cross-sectional arc of the opening groove of the water-oil separation partition is about 100°, the effect is better.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A spray filtration treatment device for artificial leather foaming waste gas (1), characterized in that: The invention comprises a box body (11), a circulating water tank (12), a water pump (16) located in the circulating water tank, and a spray device (14) and a water-oil separation partition (13) arranged in the box body; the spray device (14) is connected to the water pump (16), washing liquid is added to the circulating water tank (12), and the spray device (14) and the water-oil separation partition (13) are arranged in parallel in front and back along the gas conveying direction.

2. The spray filtration treatment device according to claim 1, characterized in that: The box body (11) is evenly divided into a first zone, a second zone, a third zone, a fourth zone and a fifth zone in sequence along the gas delivery direction. Gas is introduced from the bottom of the first zone and exhausted from the top of the fifth zone. The first zone and the second zone have the same height, which is H1. The third zone, the fourth zone and the fifth zone have the same height, which is H2. H1>H2. The spray device (14) is arranged at the upper part of the first zone; The water-oil separation baffles (13) are vertically arranged at the junctions of the zones in an alternating manner up and down; the water-oil separation baffles (13) are composed of a plurality of open grooves that are interlocked.

3. The spray filtration treatment device according to claim 2, characterized in that: The spray device (14) has multiple stages.

4. The spray filtration treatment device according to claim 2, characterized in that: The cross section of the opening groove is in an arc shape, and the angle of the arc is 80-120°.

5. The spray filtration treatment device according to claim 1, characterized in that: The height of the water-oil separation partition (13) is h, H1:H2=1.5-2:1, h:H2=1 / 2-1 / 3:

1.

6. The spray filtration treatment device according to claim 1, characterized in that: The washing liquid is composed of 0.02% to 0.1% of peregrin, 1% to 5% of sodium sulfate, 1% to 2% of sodium hydroxide, and the balance of water, according to weight percentage, and the pH value is 8-12.

7. The spray filtration treatment device according to claim 1, characterized in that: A float valve is arranged in the circulating water tank (12).

8. The spray filtration treatment device according to claim 1, characterized in that: The circulating water tank (12) is arranged below the tank body (11).

9. The spray filtration treatment device according to claim 1, characterized in that: The circulating water tank (12) is an open water tank.

10. The spray filtration treatment device according to claim 1, characterized in that: The top of the box body (11) is also provided with a fence.

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