Water curtain dust removal device for waste gas

Abstract

The utility model belongs to the field of waste gas treatment equipment, and particularly relates to a water curtain dust removal device for waste gas, which comprises a heat exchange tube, a spray tower and an exhaust fan, a water tank is arranged in the spray tower, and an equipartition plate with holes is arranged above the water tank; one end of the heat exchange tube is used for introducing waste gas, and the other end extends into the pool; two layers of spraying assemblies are arranged in the spraying tower, and an air gap for gas to pass through is formed between the spraying assemblies and the inner wall of the spraying tower; two layers of first baffle plates are arranged between the spraying assembly on the upper layer and the spraying assembly on the lower layer, the first baffle plates are obliquely arranged, and the inclination directions of the first baffle plates are different; gaps are formed between the first baffle plates and the inner wall of the spray tower, a flow gap and an air gap are formed between the two first baffle plates, and the gas flow direction is limited by the gaps and the flow gap together; an air outlet is formed in the spray tower, is communicated with the exhaust fan, and is positioned above the spray assembly on the upper layer. Therefore, the problems of low treatment efficiency and poor treatment effect of fine particles in waste gas at present are solved.

Description

Technical Field

[0001] The utility model belongs to the field of waste gas treatment equipment, and in particular relates to a water curtain dust removal device for waste gas. Background Art

[0002] The final production efficiency of industrial powder drying methods varies greatly depending on the type of raw materials being dried, viscosity and dehydration properties, and the materials may need to be further crushed. The current methods for drying materials include gas pressure spray, centrifugal spray, pressure spray, etc. The main equipment required includes a combustion furnace (to generate heat source), a drying tower (to dry the atomized powder), a cyclone separation device, a water curtain dust removal, a bag dust collector and an induced draft fan to effectively treat the dust in the exhaust gas.

[0003] Before spray drying, the material is usually dissolved in water, and the liquid raw material adjusted to a certain concentration is sucked out from the raw material tank by a high-pressure homogenizing pump and sprayed out through a specially designed spray gun under high pressure. Centrifugal spray uses liquid raw materials to be injected into a high-speed rotating turntable to atomize the liquid raw materials into fine droplets for spraying. The surface area of ​​the material after spraying is greatly increased. At this time, the atomized raw material contacts the high-temperature air, and the water evaporates immediately, turning into solid particles or powder (the product particle size can be changed by adjusting the atomization pressure), and moves downward together with the exhaust gas. Most of the powder particles are discharged from the bottom of the tower, and the exhaust gas and a small amount of tiny powder are sucked out by the outlet pipe, discharged through the cyclone separator and bag dust collector, and the exhaust gas is emptied by the induced draft fan.

[0004] When the output increases, the exhaust volume will be large, and the fine particles discharged by the cyclone separator will increase accordingly. The disadvantage of dust bags is that when the materials being dried are easy to absorb moisture, they are easy to stick to the bags and cannot be removed. Over time, the thickness becomes thicker, which reduces the dust removal efficiency of the bags. In addition, the gas after cyclone separation still has a temperature of about 80 degrees. It is also a waste if this part of heat is not used.

[0005] In the utility model patent with announcement number CN211575903U, a high-temperature waste gas treatment device for a coating powder curing furnace with waste heat recovery is disclosed. The whole device adopts a combination of waste heat recovery cooling + spray washing purification cooling + photocatalysis + activated carbon adsorption to achieve the treatment of high-temperature waste gas. Through triple purification, the waste gas purification efficiency is high and the emission of pollutants is reduced. In addition, the device cleverly connects the existing pure water equipment and pre-treatment liquid tank in the factory, and uses the concentrated water produced in the process of preparing pure water by the pure water equipment to supplement the water consumption during spraying, realizing the reuse of waste water. Spray washing adopts circulating spraying, and the replenishment water adopts the concentrated water discharged by the pure water equipment supporting the production line, saving water consumption. The hot air heats the hot water flowing through the surface cooler to 60°C, and the hot water transfers the heat to the pre-treatment liquid tank through the plate heat exchanger to supplement part of the heat required for heating the pre-treatment liquid tank. The energy cost saved by the heat recovered by the equipment is much greater than the power consumption of the equipment operation. The equipment has low use cost and achieves the reuse of waste water and waste gas.

[0006] Although the patent has been able to achieve the recycling of waste gas heat, and also disclosed the technical features of using a combination of waste heat recovery cooling + spray washing purification cooling + photocatalysis + activated carbon adsorption to achieve the treatment of high-temperature waste gas. However, in this solution, the treatment efficiency and effect of fine particles in the waste gas are not high, so it is necessary to use a variety of different types of waste gas treatment equipment, which not only increases the investment cost of the waste gas treatment equipment; at the same time, it also increases the corresponding cleaning and maintenance costs.

[0007] Therefore, in view of the current low efficiency and poor effect of treating fine particles in exhaust gas, a more reasonable solution needs to be proposed to solve the current technical problems. Utility Model Content

[0008] The utility model aims to provide a water curtain dust removal device for waste gas, so as to solve the problems of low efficiency and poor effect in the treatment of fine particles in waste gas in the prior art.

[0009] In order to achieve the above-mentioned object, the utility model provides a water curtain dust removal device for exhaust gas, comprising a heat exchange tube, a spray tower and an exhaust fan, wherein a water pool is provided in the spray tower, and a partition plate with holes is provided above the water pool; wherein one end of the heat exchange tube is used to introduce the exhaust gas, and the other end extends into the water pool;

[0010] Two layers of spray components are provided in the spray tower, and air gaps for gas to pass through are provided between the spray components and the inner wall of the spray tower; two layers of first baffles are provided between the spray components on the upper layer and the spray components on the lower layer, and the first baffles are inclined and the inclination directions of the two are different; there is a gap between the first baffle and the inner wall of the spray tower, and there is a flow gap between the two first baffles, and the air gap, the gap and the flow gap jointly define the flow direction of the gas; an air outlet is provided on the spray tower, and the air outlet is connected to the exhaust fan, wherein the air outlet is located above the spray component on the upper layer.

[0011] In a possible design, the water curtain dust removal device includes at least two spray towers, and the water pools between adjacent spray towers are connected; in adjacent spray towers, the air outlet on one is provided with a guide pipe and the guide pipe is inserted into the water pool of the other spray tower.

[0012] In a possible design, the water curtain dust removal device also includes a circulating water pump, one end of which is connected to the water pool, and the other end of which is connected to the spray assembly through a water pipe.

[0013] In a possible design, the heat exchange tube is configured as a coil.

[0014] In a possible design, a ball ring absorption layer is further provided between the spray assembly located at the lower layer and the equalizing partition plate.

[0015] In a possible design, a second baffle is provided below the spray assembly located at the lower layer, and the second baffle is arranged at an angle.

[0016] In a possible design, a control valve for adding water is provided in the lower area of ​​the spray tower.

[0017] The working process of the water curtain dust removal device can be summarized as follows: after the gas with a certain temperature is discharged from the cyclone dust removal tank, it enters the heat exchange tube. This part of the heat can be used to enter the hot air furnace for recycling, reducing energy consumption; in addition, this part of the recovered heat source can also be used for heating in the north, realizing the recycling of waste heat. The gas follows the heat exchange tube and first enters the water pool. The heat exchange tube sinks below the water surface and then aerates. A perforated gas partition plate is placed above the water surface. After the gas is discharged from the partition plate, it enters the bottom of the spray assembly. The circulating water sprays down and can absorb the fine particles in the dust collector. The gas goes up and enters the first baffle with holes on the upper part. It can also be sprayed with water for secondary absorption and purification, and finally the gas is discharged by the exhaust fan.

[0018] The design of the heat exchange tube allows waste heat to be recycled, saving energy consumption and reducing dependence on external energy. Through the design of the two-layer spray assembly and the first baffle, the device can effectively capture fine particles in the exhaust gas and improve the dust removal efficiency. The design of the air gap, gap and flow gap jointly defines the gas flow direction, so that the exhaust gas is fully in contact with the water film when passing through the spray tower, increasing the dust removal and gas purification effect. The use of this water curtain dust removal device can effectively remove pollutants in the exhaust gas, reduce the emission of dust and harmful substances, reduce the risk of explosion caused by dust accumulation in industrial production, help reduce air pollution, improve environmental quality, and reduce dependence on traditional dust bags. Therefore, the maintenance cost is low and there is no need to replace the dust bags regularly, which reduces the operating cost of the enterprise and facilitates the daily operation and maintenance of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic structural diagram of a water curtain dust removal device for exhaust gas provided by the utility model in one embodiment.

[0021] In the above drawings: 1-heat exchange tube, 2-spray tower, 201-air gap, 202-gap, 203-flow gap, 3-exhaust fan, 4-water tank, 5-even partition plate, 6-Ball ring absorption layer, 7-spray assembly, 81-first baffle, 82-second baffle, 9-guide pipe, 10-circulating water pump, 11-water pipe. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to help understand the present invention, but does not constitute a limitation on the present invention. The specific structural and functional details disclosed herein are only used to describe the embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments described herein.

[0023] According to a specific embodiment of the utility model, a water curtain dust removal device for exhaust gas is provided. Figure 1 One specific embodiment is shown.

[0024] See also Figure 1As shown, the water curtain dust removal device for exhaust gas comprises a heat exchange tube 1, a spray tower 2 and an exhaust fan 3. A water pool 4 is provided in the spray tower 2, and a perforated partition plate 5 is provided above the water pool 4; one end of the heat exchange tube 1 is used to introduce the exhaust gas, and the other end extends into the water pool 4; two layers of spray components 7 are provided in the spray tower 2, and an air gap 201 for gas to pass through is provided between the spray components 7 and the inner wall of the spray tower 2; a ball ring absorption layer 6 is also provided between the spray component 7 located at the lower layer and the partition plate 5, Two layers of first baffles 81 are arranged between the upper spray assembly 7 and the lower spray assembly 7, and the first baffles 81 are arranged at an angle and the inclination directions of the two are different; there is a gap 202 between the first baffle 81 and the inner wall of the spray tower 2, and there is a flow gap 203 between the two first baffles 81, and the air gap 201, the gap 202 and the flow gap 203 jointly limit the flow direction of the gas; an air outlet is arranged on the spray tower 2, and the air outlet is connected to the exhaust fan 3, wherein the air outlet is located above the upper spray assembly 7.

[0025] The working process of the water curtain dust removal device can be summarized as follows: after the gas with a certain temperature is discharged from the cyclone dust removal tank, it enters the heat exchange tube 1. This part of the heat can be used to enter the hot air furnace for recycling, reducing energy consumption; in addition, this part of the recovered heat source can also be used for heating in the north, realizing the recycling of waste heat. The gas follows the heat exchange tube 1 and first enters the water pool 4. The heat exchange tube 1 sinks below the water surface and then aerates. A perforated gas equalizing partition plate 5 is mounted above the water surface. After the gas is discharged from the equalizing partition plate 5, it enters the bottom of the spray assembly 7. The circulating water sprays down and can absorb the fine particles in the dust collector. The gas goes up and enters the first baffle 81 with holes on the upper part. It can also be sprayed with water for secondary absorption and purification, and finally the gas is discharged by the exhaust fan.

[0026] The design of the heat exchange tube 1 allows for waste heat recovery and utilization, saving energy consumption, while also reducing dependence on external energy. Through the design of the two-layer spray assembly 7 and the first baffle 81, the device can effectively capture fine particles in the exhaust gas and improve the dust removal efficiency. The design of the air gap 201, the gap 202 and the flow gap 203 jointly limit the gas flow direction, so that the exhaust gas is fully in contact with the water film when passing through the spray tower 2, thereby increasing the dust removal and gas purification effects. The use of the water curtain dust removal device can effectively remove pollutants in the exhaust gas, reduce the emission of dust and harmful substances, reduce the risk of explosions caused by dust accumulation in industrial production, help reduce air pollution, improve environmental quality, and reduce dependence on traditional dust bags. Therefore, the maintenance cost is low, and there is no need to replace the dust bags regularly, which reduces the operating costs of the enterprise and facilitates the daily operation and maintenance of the enterprise.

[0027] In the present disclosure, the water curtain dust removal device includes at least two spray towers 2, and the water pools 4 between adjacent spray towers 2 are connected; in the adjacent spray towers 2, the air outlet on one is provided with a guide pipe 9 and the guide pipe 9 is inserted into the water pool 4 of the other spray tower 2. This arrangement can improve the purification efficiency of the exhaust gas and reduce air pollution. In addition, by connecting the water pools 4 between different spray towers 2, water can be recycled to reduce consumption.

[0028] The water curtain dust removal device also includes a circulating water pump 10, one end of which is connected to the pool 4, and the other end is connected to the spray assembly 7 through a water pipe 11. In this way, the circulating water pump 10 extracts water from the pool 4 and transports it to the spray assembly 7, providing a constant water pressure, which helps to form a uniform water curtain and enhance the ability to capture particulate matter in the exhaust gas. After the water in the spray assembly 7 is polluted or evaporated, the circulating water pump 10 cooperates with the float valve to replenish the clean water source in time to ensure the continuous and stable dust removal effect of the system. The cooperation of the circulating water pump 10 and the float valve can prevent the water in the pool 4 from evaporating excessively, and avoid affecting the normal operation of the device due to the low water level. In addition, the working state of the circulating water pump 10 can be adjusted according to actual needs. When the water level or water pressure of the pool 4 reaches a certain condition, the alarm function is activated, so that the start or stop of the pump can be controlled accordingly to achieve energy-saving operation. By recycling water resources, the dependence on the external water treatment system is reduced, thereby reducing the water treatment cost.

[0029] In one embodiment provided by the present disclosure, the heat exchange tube 1 is configured as a coil. The coil design helps to evenly distribute heat in the heat exchange tube 1, improves the uniformity of heat exchange, and thus improves the efficiency of heat exchange, so that the heat in the exhaust gas can be more effectively transferred to the heat exchange medium. In addition, it can also adapt to different exhaust gas flow rates and temperature changes to maintain efficient heat exchange performance. Due to the improved heat exchange efficiency and reduced energy consumption, the disc heat exchange tube 1 helps to reduce the operating costs of the enterprise.

[0030] It should be noted that the coil is made of corrosion-resistant and high-temperature resistant materials to ensure its long-term stable operation.

[0031] In the present disclosure, a ball ring absorption layer 6 is also provided between the spray assembly 7 located at the lower layer and the equalizing partition plate 5. Because a gas equalizing partition plate 5 with holes is placed above the water surface, the gas enters the ball ring absorption layer 6 after being discharged from the equalizing partition plate 5, and the circulating water sprays down from the upper part of the ball ring absorption layer 6, which can better absorb the fine particles in the dust collector in the ball ring absorption layer 6, and the gas goes up to the first baffle plate 81 with holes on the upper part, and can also be secondary absorbed and purified by spraying water, and finally the gas is discharged by the exhaust fan.

[0032] A second baffle 82 is provided below the spray assembly 7 at the lower layer, and the second baffle 82 is tilted. Based on the design of the second baffle 82, the device can effectively capture fine particles in the exhaust gas, so that the exhaust gas is fully in contact with the water film when passing through the spray tower 2, thereby increasing the dust removal and gas purification effects.

[0033] See also Figure 1 As shown, a control valve for adding water is provided in the lower area of ​​the spray tower 2, so that water can be added in time according to the liquid level of the water pool 4, so that the height of the water pool 4 is maintained at an appropriate level to effectively purify dust or other gases in the exhaust gas.

[0034] In the present disclosure, the spray assembly 7 includes a plurality of spray heads, and the plurality of spray heads are arranged in an array and connected to the water pool 4 .

[0035] Finally, it should be noted that the heat exchange tube 1 structure, the spray tower 2 structure, the exhaust fan 3, the first baffle 81 and the second baffle 82 in the present disclosure are all prior art. The present disclosure aims to improve the treatment efficiency and quality of exhaust gas by creatively combining different structures in a unique manner and method. The present disclosure has a simple structure and is easy to maintain, and is suitable for promotion in various enterprises.

[0036] The utility model is not limited to the above optional implementation modes, and anyone can derive other various forms of products under the enlightenment of the utility model. The above specific implementation modes should not be understood as limiting the protection scope of the utility model. The protection scope of the utility model shall be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A water curtain dust removal device for exhaust gas, characterized in that: The water curtain dust removal device comprises a heat exchange tube, a spray tower and an exhaust fan, wherein a water pool is provided in the spray tower, and a partition plate with holes is provided above the water pool; wherein one end of the heat exchange tube is used to introduce exhaust gas, and the other end extends into the water pool; Two layers of spray components are provided in the spray tower, and air gaps for gas to pass through are provided between the spray components and the inner wall of the spray tower; two layers of first baffles are provided between the spray components on the upper layer and the spray components on the lower layer, and the first baffles are inclined and the inclination directions of the two are different; there is a gap between the first baffle and the inner wall of the spray tower, and there is a flow gap between the two first baffles, and the air gap, the gap and the flow gap jointly define the flow direction of the gas; an air outlet is provided on the spray tower, and the air outlet is connected to the exhaust fan, wherein the air outlet is located above the spray component on the upper layer.

2. The water curtain dust removal device for exhaust gas according to claim 1, characterized in that: The water curtain dust removal device comprises at least two spray towers, and the water pools between adjacent spray towers are connected; in the adjacent spray towers, the air outlet on one is provided with a guide pipe and the guide pipe is inserted into the water pool of the other spray tower.

3. The water curtain dust removal device for exhaust gas according to claim 1, characterized in that: The water curtain dust removal device also includes a circulating water pump, one end of which is connected to the water pool, and the other end of which is connected to the spray assembly through a water pipe.

4. The water curtain dust removal device for exhaust gas according to claim 1, characterized in that: The heat exchange tube is configured as a coil.

5. The water curtain dust removal device for exhaust gas according to claim 1, characterized in that: A ball ring absorption layer is also provided between the spray assembly located at the lower layer and the equalizing partition plate.

6. The water curtain dust removal device for exhaust gas according to claim 1, characterized in that: A second baffle is provided below the spray assembly located at the lower layer, and the second baffle is arranged obliquely.

7. The water curtain dust removal device for exhaust gas according to claim 1, characterized in that: A control valve for replenishing water is provided in the lower area of ​​the spray tower.

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