Water tank for tail gas treatment and tail gas treatment equipment

Abstract

The invention relates to a water tank for tail gas treatment and tail gas treatment equipment, belongs to the technical field of tail gas treatment, and solves the problems that in the prior art, the dust content of tail gas is high, equipment is easily blocked, time and labor are wasted when the tail gas treatment equipment is cleaned after blockage, and energy consumption is high when the tail gas is cooled. The water tank comprises a rectifying cavity and a containing cavity, the containing cavity is used for collecting and storing water used for the tail gas treatment equipment, a baffle is arranged in the middle of the rectifying cavity and divides the rectifying cavity into a flow mixing space and an exhaust space, a gas inlet extends into the flow mixing space from the top of the flow mixing space, and a mixer is arranged below the gas inlet. Spraying heads are arranged on the two sides of the air inlet and above the mixer, and an ultrasonic mist making device is further arranged at the bottom of the mixer. The mixer is adopted, so that tail gas generates cyclone in the mixer and is fully mixed with water mist, dust in the tail gas is effectively removed, and the energy consumption for cooling the tail gas is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas treatment, and in particular to a water tank and tail gas treatment equipment for tail gas treatment. Background Art

[0002] In the manufacturing process of the pan-semiconductor industry represented by semiconductors, solar photovoltaics, flat panel displays and LEDs, exhaust gas treatment equipment is required to treat the process exhaust gas in order to meet national standards.

[0003] The dust content of the process tail gas is high, and the dust content of the tail gas after treatment by the existing tail gas treatment equipment is still high, which is easy to clog the tail gas treatment equipment. It is time-consuming and laborious to clean the tail gas treatment equipment after clogging. In addition, the energy consumption of the existing tail gas treatment equipment for cooling the tail gas is high. Summary of the invention

[0004] In view of the above analysis, an embodiment of the present invention aims to provide a water tank and exhaust gas treatment equipment for exhaust gas treatment, so as to solve the problems of high dust content in the treated exhaust gas, easy clogging of the equipment, time-consuming and labor-intensive cleaning of the exhaust gas treatment equipment after clogging, and high energy consumption for cooling the exhaust gas.

[0005] In one aspect, the present invention provides a water tank, the water tank comprising a rectifying cavity and a containing cavity located below the rectifying cavity;

[0006] A baffle is provided in the rectifying cavity, and the baffle divides the rectifying cavity into a mixed flow space and an exhaust space. An air inlet is provided at the top of the mixed flow space, and an air outlet is provided at the top of the exhaust space.

[0007] A mixer is provided in the mixed flow space, one end of the mixer is fixedly connected to the baffle, the end of the mixer away from the baffle is closed, an opening is provided on the baffle, and the opening is located in the area enclosed by the connection between the baffle and the mixer; a cyclone is formed when the airflow passes through the mixer.

[0008] Furthermore, the mixer is arranged below the air inlet, and includes at least one upper arc plate and a W-shaped plate; the upper arc plate protrudes upward, and one side of the upper arc plate forms a first air path inclined downward, and the other side of the upper arc plate forms a second air path inclined downward; the W-shaped plate is located below the upper arc plate and is spaced apart from the upper arc plate, and the W-shaped plate includes at least two lower arc plates protruding downward arranged in parallel; after the air flows through the first air path or the second air path, a cyclone is formed between the upper arc plate and the W-shaped plate.

[0009] Furthermore, a horizontal projection of a connection point between the two lower arc plates is located within a horizontal projection of the upper arc plate.

[0010] Further, the relationship between the radius R of the upper arc plate and the radius r of the lower arc plate satisfies the following condition: 1.2r≤R≤1.8r.

[0011] Furthermore, the area enclosed by the connection between the baffle plate and the mixer is specifically an area surrounded by the projections of the upper arc plate and the W-shaped plate on the baffle plate.

[0012] Further, the horizontal projection of the air inlet is located within the horizontal projection of the upper arc plate, and the horizontal projection of the axis of the upper arc plate intersects with the horizontal projection of the air inlet.

[0013] Furthermore, the upper arc plate is provided with two layers, the upper layer is provided with a first upper arc plate, and the center line of the first upper arc plate is aligned with the axis of the air inlet; the lower layer is provided with a second upper arc plate and a third upper arc plate, wherein the center line of the second upper arc plate is aligned with the lower edge of one side of the first upper arc plate, and the center line of the third upper arc plate is aligned with the lower edge of the other side of the first upper arc plate; a W-shaped plate is respectively provided below the second upper arc plate and the third upper arc plate.

[0014] Furthermore, a spray device is provided in the mixed flow space.

[0015] Furthermore, the spray device is arranged above the mixer, and the water outlet direction of the spray device is toward the mixer.

[0016] Furthermore, a fog-making device is provided at the bottom of at least one of the lower arc plates.

[0017] Furthermore, the air inlet is arranged away from the baffle.

[0018] Furthermore, the value range of the central angle a of the upper arc plate is: 150°≤a≤200°, and the value range of the central angle b of the first lower arc plate and the second lower arc plate is: 150°≤b≤200°.

[0019] Furthermore, the central angle a of the upper arc plate and the central angle b of the first lower arc plate and the second lower arc plate are both 180°.

[0020] Furthermore, a value range of a height difference ΔH between a lower edge of the upper arc plate and an outer upper edge of the W-shaped plate is: -r / 10≤ΔH≤r / 10.

[0021] Furthermore, a height difference ΔH between a lower edge of the upper arc plate and an outer upper edge of the W-shaped plate is 0.

[0022] Furthermore, the axis of the air inlet is aligned with the horizontal projection of the axis of the upper arc plate, and the horizontal projection of the connection between the two lower arc plates is aligned with the horizontal projection of the axis of the upper arc plate.

[0023] Furthermore, a plate body extending vertically upward is arranged in the middle of the W-shaped plate, and the top end of the plate body is in contact with the lower surface of the upper arc plate.

[0024] Furthermore, a plurality of ultrasonic mist makers are provided, which are evenly distributed along the length direction of the two lower arc plates.

[0025] Further, the outer contour of the opening at least partially overlaps with the projections of the upper arc plate and the W-shaped plate on the baffle.

[0026] Furthermore, the upper arc plate is configured as a downwardly open structure consisting of two straight plates, and the W-shaped plate is configured as an upwardly open "W"-shaped structure consisting of four straight plates connected in sequence.

[0027] On the other hand, the present invention provides an exhaust gas treatment device, comprising the water tank for exhaust gas treatment as mentioned above, and also comprising an air intake chamber, a reaction chamber and a spray tower; along the exhaust gas flow direction, the air intake chamber, the reaction chamber, the water tank and the spray tower are connected in sequence; the reaction chamber is connected to the water tank through the air inlet, and the water tank is connected to the spray tower through the air outlet.

[0028] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0029] (1) The mixer of the water tank of the present invention adopts the structure of "upper arc plate + W-shaped plate", so that the exhaust gas is diverted by the upper arc plate and converges after forming a vortex in the mixer, which prolongs the flow path of the exhaust gas, increases the time the exhaust gas stays in the mixer, and enhances the mixing of the spray water and the dust particles in the exhaust gas. At the same time, the dust particles with larger particle sizes in the exhaust gas collide with the wall of the mixer under the action of the vortex, and the dust particles are separated from the gas under the action of centrifugal force, reducing the risk of blockage of the exhaust gas treatment equipment and extending the maintenance period of the exhaust gas treatment equipment.

[0030] In addition, there may be residual substances in the tail gas that have not been fully reacted and processed in the reaction chamber, such as SiH 4 For example, SiH 4 You can continue with O 2 Mix, the two react to form SiO 2 , further remove SiH 4 , improving the efficiency of exhaust gas treatment.

[0031] (2) When the exhaust gas flows through the water tank of the present invention, the dust particles with larger diameters collide with the wall of the mixer under the action of centrifugal force and are separated from the airflow under the action of gravity. At the same time, they are carried away by the continuous spraying water provided by the spray head, thereby keeping the water tank unobstructed and extending the maintenance period of the exhaust gas treatment equipment.

[0032] (3) The present invention is provided with a mist-making device, which is arranged at the bottom of the W-shaped plate. The mist-making device breaks the spray water into small-diameter droplets through high-frequency vibration. The small-diameter droplets can combine with the smaller-diameter dust particles in the exhaust gas. After the two are combined, they are easier to separate from the exhaust gas flow, thereby removing the small-diameter dust particles in the micron level.

[0033] (4) In the water tank of the present invention, the exhaust gas is fully in contact with the mixer, the contact area is large, and the exhaust gas stays in the mixer for a long time, so the heat carried by the exhaust gas can be fully transferred to the mixer. In addition, a spray head is arranged above the mixer of the water tank, and the spray head provides continuous spray water. The mixer is continuously flushed by the spray water in the water tank, and its heat is also taken away by the spray water. The above structure improves the cooling effect of the exhaust gas in the water tank and reduces the cooling energy consumption.

[0034] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0036] Figure 1 It is a three-dimensional perspective view of a water tank structure of a specific embodiment;

[0037] Figure 2 for Figure 1 A front view of a water tank of a specific embodiment;

[0038] Figure 3 for Figure 2 A sectional view of the water tank along the AA line of the specific embodiment;

[0039] Figure 4 for Figure 1 A top view of a water tank of a specific embodiment;

[0040] Figure 5 for Figure 4 A CC sectional view of a water tank of a specific embodiment;

[0041] Figure 6 A schematic diagram of a cross section of a mixer according to a specific embodiment;

[0042] Figure 7 A schematic diagram of a cross section of a mixer according to another specific embodiment Figure 1 ;

[0043] Figure 8 A schematic diagram of a cross section of a mixer according to another specific embodiment Figure 2 ;

[0044] Fig. 9 The figure is a schematic structural diagram of an embodiment of an exhaust gas treatment device.

[0045] Reference numerals:

[0046] 10-water tank; 100-rectifier chamber; 101-mixing space; 102-exhaust space; 103-baffle; 1031-opening; 110-air inlet; 120-mixer; 121-upper arc plate; 1211-first upper arc plate; 1212-second upper arc plate; 1213-third upper arc plate; 122-W-shaped plate; 1221-first lower arc plate; 1222-second lower arc plate; 123-plate body; 130-sprinkler; 140-air outlet; 150-ultrasonic mist maker; 200-accommodating chamber;

[0047] 20-air inlet chamber; 30-reaction chamber; 40-spray tower. DETAILED DESCRIPTION

[0048] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0049] It should be noted that in all the drawings, hidden structures are represented by dotted lines.

[0050] Example 1

[0051] A specific embodiment of the present invention, as Figure 1-Figure 6 As shown, a water tank 10 is disclosed, which is suitable for exhaust gas treatment equipment.

[0052] See attached Figure 2-3 The water tank 10 includes a rectifying chamber 100 and a receiving chamber 200. Fig. 9 As shown, the accommodating chamber 200 is used to collect and store water used in the operation of the exhaust gas treatment equipment, such as spray water optionally provided in the spray tower 40, water in the reaction chamber 30, and water sprayed from the spray head 130 in the rectifying chamber 100 of the water tank 10, etc. These waters are collected in the accommodating chamber 200 of the water tank 10, and are cleaned and purified in the water tank 10, and then recycled into the exhaust gas treatment process. Under normal working conditions, the water in the rectifying chamber 100 falls into the accommodating chamber 200, and the water level in the water tank 10 does not reach the rectifying chamber 100.

[0053] See also Figure 1, Figure 3 , Figure 5 A baffle 103 is provided in the middle of the rectifying chamber 100 of the water tank 10, dividing the rectifying chamber 100 into a mixed flow space 101 and an exhaust space 102. The baffle 103 may also partially or completely extend into the accommodating chamber 200. The exhaust gas rotates in the mixed flow space 101 and is fully mixed with the water mist, and then passes through the exhaust space 102 and enters the spray tower 40 from the outlet 140.

[0054] The air inlet 110 is arranged at the top of the mixed flow space 101, and the air inlet 110 is used to transport the exhaust gas to be treated. A mixer 120 is arranged below the air inlet 110, and the distance between the lower end of the air inlet 110 and the top of the mixer 120 can be set to be greater than or equal to 100 mm and less than or equal to 500 mm. The above arrangement can better ensure the guiding effect of the mixer 120 on the air flow, so that the exhaust gas generates a cyclone in the mixer 120. For example, the distance between the lower end of the air inlet 110 and the top of the mixer 120 can be set to 100 mm, 300 mm or 500 mm, all of which do not depart from the scope of the present invention, and those skilled in the art can set it according to actual needs.

[0055] A spray head 130 is arranged around the air inlet 110 and above the mixer 120, and the water outlet direction of the spray head 130 is toward the mixer 120. A plurality of spray heads 130 may be arranged, evenly distributed along the length direction of the mixer 120, and are used to spray water mist toward the upper surface of the mixer 120 to absorb dust in the air flow. It should be understood that the arrangement of the spray head 130 is not limited to Figure 1 The uniform distribution along the width direction of the mixer 120 shown only needs to be arranged in the direction of travel of the exhaust gas flowing from the air inlet 110 and can absorb dust in the exhaust gas. For example, multiple spray heads 130 surround the periphery of the air inlet 110 and are located above the mixer 120; the spray heads 130 can also be arranged in the air inlet 110. The multiple spray heads 130 can be uniformly distributed or unevenly arranged.

[0056] In this embodiment, the spray device is a spray head 130 , but the spray device of the present invention is not limited to the spray head 130 , as long as it can achieve the spray function, which will not be described in detail below.

[0057] See also Figure 1 , Figure 3 The baffle 103 is provided with an opening 1031, and the opening 1031 is provided corresponding to the outlet of the mixer 120. The airflow entering from the air inlet 110 passes through the mixer 120 and then enters the exhaust space 102 of the rectifying cavity 100 of the water tank 10 through the opening 1031.

[0058] See also Figure 1 , Figure 4 An air outlet 140 is provided at the upper portion of the exhaust space 102 , and the air flow is discharged out of the water tank 10 through the air outlet 140 .

[0059] Among them, the mixer 120 can be configured to include an upper arc plate 121 and a W-shaped plate 122. The upper arc plate 121 and the W-shaped plate 122 are both in the shape of long strips, one end of which is connected to the baffle 103, and the other end is connected to the side wall of the water tank 10 away from the baffle 103. The cross-section of the upper arc plate 121 is a circular arc protruding upward, and one side of the upper arc plate 121 forms a first air path inclined downward, and the other side forms a second air path inclined downward. The airflow entering from the air inlet 110 has a certain pressure and flow rate, rushes to the upper surface of the upper arc plate 121, and is divided into two parts by the top of the upper arc plate 121, sliding down along the first air path and the second air path on the upper surface of the upper arc plate 121, and finally leaves the edges on both sides of the upper arc plate 121 and continues to descend.

[0060] The W-shaped plate 122 is located below the upper arc plate 121 and is spaced apart from the upper arc plate 121. The length directions of the W-shaped plate 122 and the upper arc plate 121 are arranged parallel to each other. The W-shaped plate 122 includes a first lower arc plate 1221 and a second lower arc plate 1222 of the same shape and size arranged in parallel. The connection between the first lower arc plate 1221 and the second lower arc plate 1222 is aligned with the highest point of the upper arc plate 121 in the vertical direction. In this way, the mixer 120 is bilaterally symmetrical, and the airflow moving to the W-shaped plate 122 through the first gas path and the second gas path can form two symmetrical cyclones, so that the overall purification effect on the exhaust gas is balanced. The connection between the first lower arc plate 1221 and the second lower arc plate 1222 does not need to be strictly aligned with the highest point of the upper arc plate 121 in the vertical direction, and can have a certain deviation. The first lower arc plate 1221 and the second lower arc plate 1222 do not need to be completely symmetrical.

[0061] The relationship between the radius R of the upper arc plate 121 and the radius r of the first lower arc plate 1221 satisfies the following condition: 1.2r≤R≤1.8r. Through this setting, it can be ensured that the airflow leaving the upper arc plate 121 runs downward to contact the upper surface of the outer side of the first lower arc plate 1221 or the second lower arc plate 1222, and under the guidance of the arc surface, moves downward and inward, and finally forms a cyclone between the upper arc plate 121 and the W-shaped plate 122.

[0062] Compared with the prior art, the water tank 10 with the mixer 120 provided in this embodiment adopts the structure of "upper arc plate + W-shaped plate" in the mixer 120, so that the exhaust gas is diverted by the upper arc plate 121, and converges after forming a vortex in the mixer 120, thereby extending the flow path of the exhaust gas and increasing the time the exhaust gas stays in the mixer 120. At the same time, the exhaust gas is fully in contact with the mixer 120, and the heat carried by the exhaust gas is fully transferred to the mixer 120. At the same time, the dust particles in the exhaust gas collide with the wall of the mixer 120 under the action of the vortex, and the dust particles are separated from the gas under the action of centrifugal force, and the dust is thrown to the wall of the mixer 120. In addition, there may be residual substances in the exhaust gas that have not been fully reacted and processed in the reaction chamber 30, such as SiH 4 For example, SiH 4 You can continue with O 2 Mix, the two react to remove SiH 4 .

[0063] The present invention sets a spray head 130 above the mixer 120 of the water tank 10. The spray head 130 provides continuous spray water. On the one hand, the spray water is fully mixed with the dust in the exhaust gas. On the other hand, the spray water also takes away the dust on the wall of the mixer 120. The mixer 120 is continuously flushed by the spray water in the water tank 10, and its heat is also taken away by the spray water.

[0064] Example 2

[0065] Another specific embodiment of the present invention, as Figure 1-Figure 6 As shown, a water tank 10 is disclosed, which is suitable for exhaust gas treatment equipment.

[0066] Based on the structure of Example 1, further, see Figure 6 , the value range of the center angle a of the upper arc plate 121 is: 150°≤a≤200°, and the value range of the center angle b of the first lower arc plate 1221 and the second lower arc plate 1222 is: 150°≤b≤200°. For example, the center angle a of the upper arc plate 121 can be set to 150°, 170°, 190° or 200°. The center angle b of the first lower arc plate 1221 and the second lower arc plate 1222 can be set to: 150°, 170°, 190° or 200°.

[0067] Preferably, the central angle a of the upper arc plate 121 and the central angle b of the first lower arc plate 1221 and the second lower arc plate 1222 are both 180°.

[0068] Among them, if the central angle a of the upper arc plate 121 and the central angle b of the first lower arc plate 1221 and the second lower arc plate 1222 are too large, a relatively small space will be formed for the airflow to form a cyclone. The airflow escaping from the space will be difficult to be driven by the cyclone to re-enter the main airflow, so that the purification effect of the exhaust gas will be reduced.

[0069] Conversely, if the central angle a of the upper arc plate 121 and the central angle b of the first lower arc plate 1221 and the second lower arc plate 1222 are too small, the guiding surface for the airflow is too small and the opening for escape and divergence is too large, making it difficult to form a space capable of producing a complete cyclone. Ultimately, the direction of the airflow cannot be controlled and a cyclone cannot be produced.

[0070] Furthermore, the value range of the height difference ΔH between the lower edge of the upper arc plate 121 and the outer upper edge of the W-shaped plate 122 is: -r / 10≤ΔH≤r / 10.

[0071] Preferably, the height difference ΔH between the lower edge of the upper arc plate 121 and the outer upper edge of the W-shaped plate 122 is 0.

[0072] The upper arc plate 121 and the W-shaped plate 122 can be spaced apart by a certain distance in the vertical direction, or can overlap by a certain distance. As long as they are within a certain range, the generation of cyclones can be guaranteed. In the best case, the lower edge of the upper arc plate 121 and the outer upper edge of the W-shaped plate 122 are on the same horizontal plane. In this case, the pressure loss of the exhaust gas is small, and the effect of the gas cyclone is better.

[0073] Furthermore, the air inlet 110 is arranged away from the baffle 103, and the axis of the air inlet 110 is vertically aligned with the highest point of the upper arc plate 121. Such an arrangement can ensure that the flow path of the exhaust gas is longer, and the air flow of the intake air can be distributed as evenly as possible, so that the gas flow in the first air path and the second air path remains balanced, thereby improving the purification effect.

[0074] Example 3

[0075] See attached Figure 7 As shown, on the basis of Example 1 or Example 2, a plate body 123 extending vertically upward is arranged in the middle of the W-shaped plate 122, and the top end of the plate body 123 extends into the space surrounded by the upper arc plate 121, preferably in contact with the lower surface of the upper arc plate 121.

[0076] Such an arrangement can guide the flow of exhaust gas and avoid interference between the cyclones on both sides, which would affect the effect.

[0077] Example 4

[0078] See attached Figure 8As shown, on the basis of Example 1 or Example 2 or Example 3, the upper arc plate 121 is provided with an upper and lower layer, and the first upper arc plate 1211 is provided on the upper layer, and the center line of the first upper arc plate 1211 is aligned with the axis of the air inlet 110; the second upper arc plate 1212 and the third upper arc plate 1213 are provided on the lower layer, wherein the center line of the second upper arc plate 1212 is aligned with the lower edge of one side of the first upper arc plate 1211, and the center line of the third upper arc plate 1213 is aligned with the lower edge of the other side of the first upper arc plate 1211; a W-shaped plate 122 is respectively provided below the second upper arc plate 1212 and the third upper arc plate 1213.

[0079] Through the above-mentioned arrangement, the airflow entering the water tank 10 is further dispersed, and the amount of each airflow is smaller, so that the mixing between the exhaust gas and the water mist is more complete and the dust removal effect is better.

[0080] The center line of the first upper arc plate 1211 does not need to be strictly aligned with the axis of the air inlet 110, the center line of the second upper arc plate 1212 does not need to be strictly aligned with the lower edge of one side of the first upper arc plate 1211, and the center line of the third upper arc plate 1213 does not need to be strictly aligned with the lower edge of the other side of the first upper arc plate 1211. All of the above can have certain deviations.

[0081] Example 5

[0082] On the basis of any of the foregoing embodiments, an ultrasonic mist maker 150 is disposed at the bottom of the first lower arc plate 1221 and the bottom of the second lower arc plate 1222 .

[0083] The mist-making device in this embodiment uses an ultrasonic mist-making device 150. In other embodiments, mist-making devices such as a jet atomizer, a mesh atomizer, etc. can also be used.

[0084] Furthermore, a plurality of ultrasonic mist generators 150 are provided, which are evenly distributed along the length direction of the first lower arc plate 1221 and the second lower arc plate 1222 .

[0085] Furthermore, an ultrasonic mist generator 150 may be arranged within 10 mm below the water surface in the accommodating chamber 200 .

[0086] The ultrasonic mist maker 150 breaks the spray water into small-diameter droplets through high-frequency vibration. The small-diameter droplets can combine with the small-diameter dust particles in the exhaust gas to achieve the separation of the small-diameter dust particles.

[0087] Further, one end of the upper arc plate 121 and the W-shaped plate 122 is fixedly connected to the side wall of the mixed flow space 101 of the water tank 10 away from the exhaust space 102, and the other end is fixedly connected to the baffle 103. The above-mentioned fixed connection method can be welding, or can be fixed by bolts, or other connection methods in the prior art.

[0088] Furthermore, the opening 1031 is disposed within an enclosed area projected by the upper arc plate 121 and the W-shaped plate 122 on the baffle 103 .

[0089] Preferably, the outer contour of the opening 1031 is located within the projection of the upper arc plate 121 and the W-shaped plate 122 on the baffle 103. The outer contour of the opening 1031 can be set to coincide with the projection of the upper arc plate 121 and the W-shaped plate 122 on the baffle 103. In this case, the pressure loss of the exhaust gas is small and the airflow is more stable.

[0090] In this embodiment, a fogging device is provided, and the fogging device is arranged at the bottom of the W-shaped plate 122. The fogging device breaks the spray water into small-diameter droplets through high-frequency vibration. The small-diameter droplets can combine with the smaller-diameter dust particles in the exhaust gas. After the two are combined, they are easier to separate from the exhaust gas flow, thereby removing the small-diameter dust particles in the micron level.

[0091] Example 6

[0092] Based on any of the above embodiments, the upper arc plate 121 is configured as a downwardly open structure consisting of two straight plates, i.e., an inverted V-shaped folded plate bent downward. The W-shaped plate 122 is configured as an upwardly open "W"-shaped structure consisting of four straight plates connected in sequence.

[0093] Such an arrangement makes the plate shape simple, easy to process and reduces costs.

[0094] On the other hand, see Appendix Fig. 9 As shown, the present invention provides an exhaust gas treatment device including the aforementioned water tank 10, the exhaust gas treatment device includes the aforementioned water tank 10, and also includes an air inlet chamber 20, a reaction chamber 30 and a spray tower 40. The air inlet chamber 20 is connected to the reaction chamber 30, the reaction chamber 30 is connected to the water tank 10 through the air inlet 110, and the air outlet 140 of the water tank 10 is connected to the spray tower 40.

[0095] When the exhaust gas treatment equipment is in operation, the exhaust gas enters the water tank 10 from the air inlet 110 and flows downward, and is divided into two gas paths by the upper arc plate 121. The two gas paths move downward along the upper arc plate 121 and enter the W-shaped plate 122, and after spiral movement along the space formed by the W-shaped plate 122 and the upper arc plate 121, enter the exhaust space 102 on the right side of the water tank 10 through the opening 1031 on the baffle plate 103, and enter the spray tower 40 from the air outlet 140. At the same time, the water of the spray head 130 sprays the exhaust gas, and the water flows downward to the W-shaped plate 122 and then flows from the opening 1031 of the baffle plate 103 to the accommodating cavity 200 of the water tank 10.

[0096] Through the exhaust gas treatment equipment of the present invention, after the exhaust gas enters the water tank 10, a cyclone is formed in the mixer 120, and is fully mixed with the water mist sprayed by the spray head 130. Through the combined action of centrifugal force, gravity and the adhesion force of the water mist, dust and other impurities in the exhaust gas are separated from the airflow, thereby achieving the purification effect of the exhaust gas.

[0097] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A water tank for tail gas treatment, It is characterized in that The water tank comprises a rectifying cavity and a containing cavity located below the rectifying cavity; A baffle is provided in the rectifying cavity, and the baffle divides the rectifying cavity into a mixed flow space and an exhaust space. An air inlet is provided at the top of the mixed flow space, and an air outlet is provided at the top of the exhaust space. A mixer is provided in the mixed flow space, one end of the mixer is fixedly connected to the baffle, and the end of the mixer away from the baffle is closed; an opening is provided on the baffle, and the opening is located in the area enclosed by the connection between the baffle and the mixer; a cyclone is formed when the airflow passes through the mixer.

2. The water tank for tail gas treatment according to claim 1, It is characterized in that The mixer is arranged below the air inlet, and includes at least one upper arc plate and a W-shaped plate; the upper arc plate protrudes upward, and one side of the upper arc plate forms a first air path inclined downward, and the other side of the upper arc plate forms a second air path inclined downward; the W-shaped plate is located below the upper arc plate and is spaced apart from the upper arc plate, and the W-shaped plate includes at least two lower arc plates protruding downward arranged in parallel; after the air flows through the first air path or the second air path, a cyclone is formed between the upper arc plate and the W-shaped plate.

3. The water tank for tail gas treatment according to claim 2, It is characterized in that The horizontal projection of the connection point of the two lower arc plates is located within the horizontal projection of the upper arc plate.

4. The water tank for tail gas treatment according to claim 2, It is characterized in that The relationship between the radius R of the upper arc plate and the radius r of the lower arc plate satisfies the following condition: 1.2r≤R≤1.8r.

5. The water tank for tail gas treatment according to claim 2, It is characterized in that The area enclosed by the connection between the baffle plate and the mixer is specifically the area surrounded by the projections of the upper arc plate and the W-shaped plate on the baffle plate.

6. The water tank for tail gas treatment according to claim 2, It is characterized in that The horizontal projection of the air inlet is located within the horizontal projection of the upper arc plate, and the horizontal projection of the axis of the upper arc plate intersects with the horizontal projection of the air inlet.

7. The water tank for tail gas treatment according to claim 2, It is characterized in that The upper arc plate is provided with an upper and lower layer, the upper layer is provided with a first upper arc plate, and the center line of the first upper arc plate is aligned with the axis of the air inlet; The lower layer is provided with a second upper arc plate and a third upper arc plate, wherein the center line of the second upper arc plate is aligned with the lower edge of one side of the first upper arc plate, and the center line of the third upper arc plate is aligned with the lower edge of the other side of the first upper arc plate; A W-shaped plate is correspondingly arranged below the second upper arc plate and the third upper arc plate.

8. The water tank for tail gas treatment according to claim 1, It is characterized in that A spray device is arranged in the mixed flow space.

9. The water tank for tail gas treatment according to claim 8, It is characterized in that The spray device is arranged above the mixer, and the water outlet direction of the spray device is toward the mixer.

10. The water tank for tail gas treatment according to claim 1, It is characterized in that A fog-making device is provided at the bottom of at least one of the lower arc plates.

11. An exhaust gas treatment device, comprising a water tank for exhaust gas treatment according to any one of claims 1 to 10, It is characterized in that It also includes an air intake chamber, a reaction chamber and a spray tower; along the flow direction of the exhaust gas, the air intake chamber, the reaction chamber, the water tank and the spray tower are connected in sequence; the reaction chamber is connected to the water tank through the air inlet, and the water tank is connected to the spray tower through the air outlet.

Images