Automatic dedusting and deacidifying spray tower

Abstract

The utility model provides an automatic dedusting and deacidifying spray tower, which comprises a tower body, a demister and more than two groups of deacidifying devices are sequentially arranged in the tower body from the top of the tower body to the bottom of the tower body, each deacidifying device comprises a filler layer and a spray pipeline arranged above the filler layer, the spray pipeline is provided with more than two spray nozzles facing the filler layer, and the spray nozzles are communicated with the deacidifying devices. The spraying directions of the adjacent spraying heads are different and form an included angle theta which is more than or equal to 45 degrees and less than or equal to 90 degrees; the bottom of the tower body is provided with an inverted-cone-shaped sediment opening, the sediment opening is connected with a filtering device, the filtering device is connected with a circulating water tank, the circulating water tank is connected with a spraying pipeline through a circulating pump, spraying nozzles in different spraying directions are arranged, liquid can be sprayed out in the different spraying directions, the spraying angles of the spraying nozzles are large, and the spraying effect is good. Different areas of the filler layer can be covered, so that liquid is uniformly distributed on the filler layer, waste gas can be in full contact with the liquid in the different areas of the filler layer, and the purification effect on the waste gas is good.

Description

Technical Field

[0001] The utility model relates to the field of waste gas purification, in particular to an automatic dust removal and acid removal spray tower. Background Art

[0002] The spray tower is a gas-liquid generating device. It is an important equipment in waste gas treatment, especially widely used in industrial waste gas treatment. Through the full contact between waste gas and liquid, the solubility or chemical reaction of waste gas in water is used to reduce the concentration of pollutants, thereby purifying the waste gas.

[0003] A patent document in China with application number 201921365422.3 and announcement date 2020.5.26 discloses a spray tower, including a tower body, the tower body is provided with an air inlet and an air outlet, and a demisting layer, a demisting cyclone plate and a packing layer are arranged from top to bottom in the tower body, and a spray pipe is arranged above the packing layer. A liquid storage tank is arranged at the bottom of the tower body, and the demisting layer is composed of a plurality of demisting baffles evenly arranged vertically. An inclined filter plate is arranged at the bottom of the liquid tank, and the liquid storage tank is connected to the spray pipe through a circulating pump, and the liquid inlet of the circulating pump is located below the filter plate; a first flushing pipe, a second flushing pipe and a third flushing pipe are also provided to clean the demisting layer and the demisting cyclone plate.

[0004] The nozzle of the spray pipe in the spray tower sprays liquid downward, and the nozzle sprays liquid in only one direction, so the spray liquid cannot be evenly distributed in the packing layer, and the water distribution uniformity is different in different areas of the packing layer, so that the degree of contact between the exhaust gas and the liquid in different areas of the packing layer is different, and then the exhaust gas cannot fully react with the liquid on part of the surface of the packing layer, resulting in poor purification effect on the exhaust gas. Utility Model Content

[0005] The utility model provides an automatic dust removal and acid removal spray tower, which is equipped with spray nozzles with different spray directions and can spray liquid in different spray directions, so that the liquid is evenly distributed on the filler, and then the waste gas in different areas of the filler layer can fully contact with the liquid, and the waste gas purification effect is good.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is: an automatic dust removal and acid removal spray tower, including a tower body, a discharge port is provided at the top of the tower body, an air inlet is provided at the bottom of the tower body, a demister and more than two groups of acid removal devices are sequentially provided inside the tower body from the top of the tower body to the bottom of the tower body, the more than two groups of acid removal devices are distributed at intervals along the height direction of the tower body, and are arranged downwardly inclined from the input end of the air inlet to the output end of the air inlet along the height direction of the tower body.

[0007] The deacidification device includes a packing layer and a spray pipe arranged above the packing layer. The spray pipe is provided with more than two spray nozzles facing the packing layer. The spray directions of adjacent spray heads are different and form an angle θ, 45°≤θ≤90°; an inverted cone-shaped sediment port is provided at the bottom of the tower body, the sediment port is connected to the filter device, the filter device is connected to the circulating water tank, and the circulating water tank is connected to the spray pipe through a circulating pump.

[0008] In the above setting, the air inlet is tilted, and the exhaust gas input at the rear will push the exhaust gas in the front to move to the bottom of the tower body. At the same time, the flow direction of the exhaust gas input from the air inlet is opposite to the flow direction of the exhaust gas floating up from the bottom of the tower body, thereby slowing down the flow speed of the exhaust gas, slowing down the overall speed of the exhaust gas in the spray tower, allowing the exhaust gas and liquid to fully contact and react, and at the same time reducing the impact of the exhaust gas on the spray tower by slowing down the flow rate of the exhaust gas.

[0009] The spray nozzles with different spraying directions can spray liquid in different spraying directions. The spray nozzles have a large spraying angle and can cover different areas of the packing layer, so that the liquid is evenly distributed on the packing layer, and then the exhaust gas can fully contact with the liquid in different areas of the packing layer, which has a good purification effect on the exhaust gas; the exhaust gas contacts the liquid in the packing layer, increasing the contact area between the exhaust gas and the liquid, and the liquid fully reacts with the particles in the exhaust gas to form sediment, which accumulates in the filter device under the action of gravity. The sediment port is set in an inverted cone shape to facilitate sediment accumulation; the filter device filters the sediment, and the filtered liquid is circulated through the circulating water tank and the circulating pump to act on the exhaust gas again, purifying the exhaust gas and separating the harmful substances in the exhaust gas from the gas. At the same time, the demister removes the droplets in the exhaust gas, separates the gas from the liquid, and then discharges the gas.

[0010] Furthermore, there are more than three spray heads, namely a first spray head, a second spray head and a third spray head; the first spray head is vertically arranged on the spray pipe, and the second spray head and the third spray head are inclinedly arranged on the spray pipe.

[0011] With the above arrangement, the second spray nozzle and the third spray nozzle spray the liquid onto the packing layer in an inclined direction, and the first spray nozzle sprays the liquid onto the packing layer in a vertical direction; the first spray nozzle, the second spray nozzle and the third spray nozzle can spray the liquid in different directions.

[0012] Furthermore, the second spray nozzle and the third spray nozzle have opposite inclination directions; the second spray nozzle, the first spray nozzle and the third spray nozzle are alternately arranged in sequence along the length direction of the spray pipe.

[0013] With the above arrangement, the first spray nozzle, the second spray nozzle and the third spray nozzle spray liquid toward the packing layer in different directions respectively, so as to cover different areas of the packing layer with a wide coverage.

[0014] Furthermore, the angle between the first spray nozzle and the second spray nozzle, and the angle between the first spray nozzle and the third spray nozzle are 45°.

[0015] The above arrangement makes it easier for the liquid to cover the edge area of ​​the packing layer.

[0016] Furthermore, a backwashing pipe is provided below the demister, the backwashing pipe is connected to the liquid replenishing device, and more than two backwashing nozzles are provided on the backwashing pipe toward the demister.

[0017] The above setting is to flush the demister by setting a backwash nozzle to avoid clogging of the demister.

[0018] Furthermore, the filtering device includes a filter shell and a filter cover plate, one end of the filter shell is connected to the sediment port, the filter cover plate is arranged at the end of the filter shell away from the sediment port and is locked with the filter shell; a filter outlet is provided on one side of the filter shell, and a filter screen is provided on the inner side of the filter outlet.

[0019] With the above arrangement, the sediment and liquid fall into the filter housing under the action of gravity, and are separated by the filter screen; the filter cover is arranged at one end of the filter housing away from the sediment outlet and is locked with the filter housing; by opening the filter cover, the sediment can be released from the filter device under the action of gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the utility model.

[0021] Figure 2 It is a schematic diagram of the first spray nozzle, the second spray nozzle and the third spray nozzle in the utility model.

[0022] Figure 3 It is a schematic diagram of the sediment outlet and the filtering device.

[0023] Figure symbols: tower body 1, demister 2, deacidification device 3, sediment outlet 4, filter device 5, circulating water tank 6, circulating pump 7, backwash pipe 8, discharge port 11, air inlet 12, packing layer 31, spray pipe 32, filter housing 51, filter cover plate 52, filter outlet 53, filter screen 54, liquid replenishment device 80, backwash nozzle 81, first spray nozzle 321, second spray nozzle 322, third spray nozzle 323. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] like Figure 1-3As shown, an automatic dust removal and acid removal spray tower includes a tower body 1, a discharge port 11 is provided at the top of the tower body 1, and an air inlet 12 is provided at the bottom of the tower body 1, which is tilted downward from the input end of the air inlet 12 to the output end of the air inlet 12 along the height direction of the tower body 1. The air inlet 12 is tilted, and the exhaust gas input at the rear will push the exhaust gas in the front to move to the bottom of the tower body 1. At the same time, the flow direction of the exhaust gas input from the air inlet 12 is opposite to the flow direction of the exhaust gas floating from the bottom of the tower body 1, thereby slowing down the flow speed of the exhaust gas, slowing down the overall speed of the exhaust gas in the spray tower, and making the exhaust gas and the liquid fully contact and react. At the same time, by slowing down the flow rate of the exhaust gas, the impact of the exhaust gas on the spray tower is reduced.

[0026] A demister 2 and more than two groups of deacidification devices 3 are sequentially arranged inside the tower body 1 from the top of the tower body 1 to the bottom of the tower body 1. The more than two groups of deacidification devices 3 are spaced apart along the height direction of the tower body 1. The deacidification device 3 includes a packing layer 31 and a spray pipe 32 arranged above the packing layer 31. A sediment port 4 with an inverted cone shape is arranged at the bottom of the tower body 1. The sediment port 4 is connected to the filter device 5, the filter device 5 is connected to the circulating water tank 6, and the circulating water tank 6 is connected to the spray pipe 32 through a circulating pump 7.

[0027] The alkaline liquid sprayed from the spray pipe 32 contacts the waste gas, and the alkaline liquid fully reacts with the particulate matter in the waste gas to form sediment, which is accumulated in the filter device 5 under the action of gravity. The sediment port 4 is set in an inverted cone shape to facilitate sediment accumulation; the filter device 5 filters the sediment, and the filtered liquid is circulated through the circulating water tank 6 and the circulating pump 7 to react with the waste gas again, purifying the waste gas and separating the harmful substances in the waste gas from the gas. At the same time, the demister 2 removes the droplets in the waste gas, separates the gas from the liquid, and then discharges the gas.

[0028] The filter device 5 includes a filter housing 51 and a filter cover plate 52, one end of the filter housing 51 is connected to the sediment port 4, and the filter cover plate 52 is arranged at an end of the filter housing 51 away from the sediment port 4 and is locked with the filter housing 51; in the present embodiment, one end of the filter cover plate 52 is hinged to the filter housing 51, and the other end of the filter cover plate 52 is locked with the filter housing 51 by a locking device (not shown in the figure), and the locking device is a push-type lock.

[0029] A filter outlet 53 is provided on one side of the filter housing 51, and a filter screen 54 is provided on the inner side of the filter outlet 53. The sediment and liquid fall into the filter housing 51 under the action of gravity, and are separated by the filter screen 54; the filter cover 52 is provided at one end of the filter housing 51 away from the sediment outlet 4 and is locked with the filter housing 51; by opening the filter cover 52, the sediment can be removed from the filter device 5 under the action of gravity.

[0030] The spray pipe 32 is provided with more than two spray nozzles facing the packing layer 31, and the spray directions of adjacent spray heads are different and form an angle θ, 45°≤θ≤90°; the spray nozzles with different spray directions are arranged to spray liquid along different spray directions, and the spray nozzles have a large spray angle, which can cover different areas of the packing layer 31, thereby achieving uniform distribution of the liquid on the packing layer 31, and thus the exhaust gas in different areas of the packing layer 31 can be fully in contact with the liquid, and the exhaust gas purification effect is good; the exhaust gas contacts the liquid in the packing layer 31, thereby increasing the contact area between the exhaust gas and the liquid.

[0031] In this embodiment, the spray nozzles are provided with more than three, namely, the first spray nozzle 321, the second spray nozzle 322 and the third spray nozzle 323; the first spray nozzle 321 is vertically arranged on the spray pipe 32, and the second spray nozzle 322 and the third spray nozzle 323 are obliquely arranged on the spray pipe 32. The second spray nozzle 322 and the third spray nozzle 323 spray the liquid onto the packing layer 31 along the oblique direction, and the first spray nozzle 321 sprays the liquid onto the packing layer 31 along the vertical direction; the first spray nozzle 321, the second spray nozzle 322 and the third spray nozzle 323 can spray the liquid along different directions.

[0032] The second spray head 322 and the third spray head 323 are inclined in opposite directions; the second spray head 322, the first spray head 321 and the third spray head 323 are alternately arranged along the length direction of the spray pipe 32. The first spray head 321, the second spray head 322 and the third spray head 323 spray liquid to the packing layer 31 in different directions respectively, and can cover different areas of the packing layer 31 with a wide coverage range. The angle between the first spray head 321 and the second spray head 322, and the angle between the first spray head 321 and the third spray head 323 are 45°. In this way, the second spray head 322 and the third spray head 323 have a large inclination angle relative to the first spray head 321, which is convenient for the liquid to cover the edge area of ​​the packing layer 31.

[0033] A backwash pipe 8 is also provided below the demister 2, and the backwash pipe 8 is connected to a liquid replenishing device 80. The backwash pipe 8 is provided with two or more backwash nozzles 81 toward the demister 2. The demister 2 is flushed by providing the backwash nozzles 81 to avoid blockage of the demister 2. In this embodiment, the liquid replenishing device 80 is a water tank, and an alkaline liquid is stored in the liquid replenishing device 80, so that the alkaline liquid in the spray tower can be replenished while the demister 2 is flushed, thereby ensuring the concentration of the alkaline liquid in the spray tower, so that the spray tower can continuously purify the exhaust gas.

Claims

1. An automatic dust removal and deacidification spray tower, comprising a tower body, a discharge port is provided at the top of the tower body, an air inlet is provided at the bottom of the tower body, a demister and two or more deacidification devices are sequentially provided inside the tower body from the top of the tower body to the bottom of the tower body, and the two or more deacidification devices are spaced apart and distributed along the height direction of the tower body, characterized in that: Along the height direction of the tower body, it is arranged to be inclined downward from the input end of the air inlet to the output end of the air inlet; The deacidification device includes a packing layer and a spray pipe arranged above the packing layer. The spray pipe is provided with more than two spray nozzles facing the packing layer. The spray directions of adjacent spray heads are different and form an angle θ, 45°≤θ≤90°; an inverted cone-shaped sediment port is provided at the bottom of the tower body, the sediment port is connected to the filter device, the filter device is connected to the circulating water tank, and the circulating water tank is connected to the spray pipe through a circulating pump.

2. The automatic dust removal and deacidification spray tower according to claim 1 is characterized in that: There are more than three spray nozzles, namely a first spray nozzle, a second spray nozzle and a third spray nozzle; the first spray nozzle is vertically arranged on the spray pipe, and the second spray nozzle and the third spray nozzle are inclinedly arranged on the spray pipe.

3. The automatic dust removal and deacidification spray tower according to claim 2 is characterized in that: The second spray nozzle and the third spray nozzle have opposite inclination directions, and the second spray nozzle, the first spray nozzle and the third spray nozzle are alternately arranged in sequence along the length direction of the spray pipe.

4. The automatic dust removal and deacidification spray tower according to claim 2 is characterized in that: The included angle between the first spray nozzle and the second spray nozzle, and the included angle between the first spray nozzle and the third spray nozzle are 45°.

5. The automatic dust removal and deacidification spray tower according to claim 1 is characterized in that: A backwashing pipeline is also provided below the demister, the backwashing pipeline is connected to the liquid replenishing device, and more than two backwashing nozzles are provided on the backwashing pipeline toward the demister.

6. The automatic dust removal and deacidification spray tower according to claim 1 is characterized in that: The filter device includes a filter housing and a filter cover plate, one end of the filter housing is connected to the sediment port, the filter cover plate is arranged at an end of the filter housing away from the sediment port and is locked with the filter housing; a filter outlet is provided on one side of the filter housing, and a filter screen is provided on the inner side of the filter outlet.

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