Wet pretreatment device for hydrogen sulfide waste gas recovery

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a wet pretreatment device for hydrogen sulfide waste gas recovery, which comprises a first tower body, the gas inlet end of the first tower body is connected with a gas inlet pipe, the water outlet end of the first tower body is connected with a water pipe, and the other end of the water pipe is connected with a shunt pipe; spraying heads are evenly distributed on the lower surface of the flow dividing pipe. The second tower body is connected to the top of the first tower body, a filler frame is connected to the inner wall of the second tower body, a liquid guide plate is arranged on the upper surface of the filler frame, and a gas guide plate is arranged on the lower surface of the filler frame. According to the present invention, the obliquely distributed filler frame is arranged in the tower body, such that the gas guide plate can guide the rising waste gas so as to make the waste gas rise in the S-shaped track, such that the contact time of the waste gas and the spraying liquid is improved, the contact area and the efficiency of the waste gas and the spraying liquid are improved, and the purification efficiency is substantially improved.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, in particular to a wet pretreatment device for recovering hydrogen sulfide waste gas. Background Art

[0002] The recovery and treatment of hydrogen sulfide waste gas mainly involves several key steps and methods, including pretreatment, in-furnace oxidation, energy recovery and waste gas discharge. These steps are usually carried out in an integrated treatment process to ensure that hydrogen sulfide waste gas is effectively recovered and treated. Among them, the spray tower, as a wet pretreatment equipment, can effectively remove particulate matter in the waste gas. The packed spray tower is used as a pretreatment, and the circulating water is used to absorb and treat the waste gas to remove pollutants such as hydrogen sulfide.

[0003] When the existing spray tower is treating waste gas, the waste gas flows from bottom to top, and a spray device is arranged at the top of the tower body to spray liquid, thereby achieving waste gas purification through contact with the rising waste gas. However, this method will result in incomplete contact with the waste gas, resulting in the inability to fully purify the waste gas, thereby reducing its purification efficiency. Therefore, it is urgent to design a wet pretreatment device for hydrogen sulfide waste gas recovery to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a wet pretreatment device for recovering hydrogen sulfide waste gas, so as to solve the problem in the above background technology that the waste gas is not contacted thoroughly, resulting in the inability to fully purify the waste gas and reducing its purification efficiency.

[0005] To achieve the above object, the present invention provides the following technical solution: a wet pretreatment device for recovering hydrogen sulfide waste gas, comprising: A first tower body, wherein an air inlet end of the first tower body is connected to an air inlet pipe, a water outlet end of the first tower body is connected to a water pipe, and the other end of the water pipe is connected to a shunt pipe, and spray heads are evenly distributed on the lower surface of the shunt pipe; A second tower body, wherein the second tower body is connected to the top of the first tower body, and the inner wall of the second tower body is connected to a packing frame, a liquid guide plate is provided on the upper surface of the packing frame, and a gas guide plate is provided on the lower surface of the packing frame, and both the liquid guide plate and the gas guide plate are inclined, and most of the rising gas rises in an "S" shape through the blocking guide of the gas guide plate and the packing frame; The third tower body is connected to the top of the second tower body, and a demister is arranged on the inner wall of the top end of the third tower body.

[0006] Preferably, the first tower body and the second tower body are connected in a flange sealing manner at one end close to each other, the second tower body and the third tower body are connected in a flange sealing manner at one end close to each other, the circulating water outlet end of the first tower body is connected to a water pipe through a circulating pump, and the other end of the water pipe passes through the interior of the third tower body.

[0007] Preferably, the diverter pipe array is distributed below the horizontal section of the water pipe, and the spacing between adjacent diverter pipes is smaller than the spray diameter of the sprinkler head; sprinkler heads are distributed in an array below the diverter pipes, and the spacing between adjacent sprinkler heads is smaller than the spray diameter of the sprinkler head.

[0008] Preferably, an inspection window is provided on the outer wall of the second tower body, and a sealing cover is connected to the outer wall of the inspection window by bolts, and the interior of each inspection window corresponds to a filling frame, and a feeding port is provided on the filling frame corresponding to the inspection window. There are five groups of inspection windows in total, and adjacent inspection windows are staggered on both sides of the second tower body.

[0009] Preferably, there are five filling frames in total, and adjacent filling frames are distributed in a staggered manner, one side of the filling frame where the feeding port is opened is fixedly connected to the inner wall of the second tower body, the interior of the filling frame is filled with filler, a guide hole is opened at the lowest point where the filling frame and the gas guide plate contact, and a guide pipe is connected below the guide hole, and the other end of the guide pipe is connected to a liquid baffle, and the liquid baffle is connected to the upper surface of the lower liquid guide plate.

[0010] Preferably, seepage holes are opened on the upper surface of the liquid guide plate, and a water distribution baffle is fixedly connected to the upper surface of the liquid guide plate, and the water distribution baffle is located on the high end outer wall of the seepage hole, and the two ends of the water distribution baffle are arranged in a flared shape, the seepage holes are distributed in a staggered shape, and the water distribution baffle is used for guiding water sources.

[0011] Preferably, the gas guide plate is evenly provided with air rise holes, and the diameter of the air rise holes is smaller than the diameter of the seepage holes. The gas guide plate is used to block and guide the rising exhaust gas, and a small amount of exhaust gas passes directly through the air rise holes to the top of the liquid guide plate.

[0012] Preferably, the inclined bottom end of the liquid guide plate is fixedly connected to a waterfall guide plate, and a liquid baffle is arranged above the waterfall guide plate, the edge of the waterfall guide plate away from the liquid guide plate is an arc-shaped structure, and the cross-section of the waterfall guide plate is an L-shaped structure, and the inner wall of the vertical end of the waterfall guide plate is inclined, the water flow at the bottom of the waterfall guide plate forms a waterfall shape, the interior of the liquid baffle corresponding to the arc-shaped structure of the waterfall guide plate is a hollow structure, and an overflow hole is opened below the liquid baffle, and the outer wall of the liquid baffle is used to block the water flow.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The wet pretreatment device for recovering hydrogen sulfide waste gas sets an inclined distributed packing frame inside the tower body, so that the gas guide plate guides the rising waste gas, making it rise in an S-shaped trajectory, thereby increasing the contact time between the waste gas and the spray liquid, and at the same time increasing the contact area and efficiency between the waste gas and the spray liquid, thereby greatly improving its purification efficiency.

[0014] 2. A small amount of liquid sprayed by the spray head in the wet pretreatment device for hydrogen sulfide waste gas recovery will enter the packing frame through the liquid guide plate. The liquid will form a water film in the gap of the packing, thereby increasing the contact with the waste gas and preventing the waste gas from passing through the packing area from being unable to fully react.

[0015] 3. The wet pretreatment device for recovering hydrogen sulfide waste gas plays a certain guiding role on the falling liquid through the setting of the liquid guide plate, so that most of the liquid forms a waterfall-like structure through the end liquid baffle and the setting of the waterfall guide plate. Through the distribution of the waterfall-like structure, the full contact with the rising waste gas is improved, the contact area is increased, and then its reaction efficiency and purification efficiency are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the gas rising path structure of the present invention; Figure 4 It is a schematic diagram of the distribution structure of the shower head of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the packing frame of the present invention; Figure 6 For the present invention Figure 5 A is a schematic diagram of the enlarged structure of the middle part; Figure 7 It is a schematic diagram of the explosion structure of the liquid guide plate of the present invention; Figure 8 It is a schematic diagram of the distribution structure of the waterfall guide plate of the present invention.

[0017] In the figure: 1. first tower body; 11. air inlet pipe; 12. water pipe; 13. diverter pipe; 14. sprinkler head; 2. second tower body; 21. inspection window; 22. sealing cover; 3. third tower body; 31. demister; 4. packing frame; 41. liquid guide plate; 42. seepage hole; 43. water distribution baffle; 45. gas guide plate; 46. feeding port; 47. liquid baffle; 48. waterfall guide plate; 49. air riser hole. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-8 , an embodiment provided by the present invention: A wet pretreatment device for recovering hydrogen sulfide waste gas, comprising: A first tower body 1, an air inlet end of the first tower body 1 is connected to an air inlet pipe 11, a water outlet end of the first tower body 1 is connected to a water pipe 12, and the other end of the water pipe 12 is connected to a shunt pipe 13, and spray heads 14 are evenly distributed on the lower surface of the shunt pipe 13. Through the setting of its structure, its water flow forms a closed-loop system, and the water source filtered inside the air inlet pipe 11 can be guided to the shunt pipe 13 through the water pipe 12, and then sprayed through the spray head 14, so as to spray the rising exhaust gas, purify and absorb the internal exhaust gas, so that its discharge meets environmental protection standards; The second tower body 2 is connected to the top of the first tower body 1, and the inner wall of the second tower body 2 is connected to a packing frame 4, the upper surface of the packing frame 4 is provided with a liquid guide plate 41, and the lower surface of the packing frame 4 is provided with a gas guide plate 45, and the liquid guide plate 41 and the gas guide plate 45 are both inclined, and most of the rising gas rises in an "S" shape through the blocking and guiding of the gas guide plate 45 and the packing frame 4. Through the setting of this structure, the rising exhaust gas is in an S shape, thereby increasing the flow time of the exhaust gas in the tower body, thereby improving its reaction efficiency; The third tower body 3 is connected to the top of the second tower body 2, and a demister 31 is arranged on the inner wall of the top of the third tower body 3, which is mainly composed of fixing devices such as corrugated blades, plates, and clamping strips. In the wet flue gas desulfurization, the device is prone to produce "fog" with a particle size of 10 microns to 60 microns during operation. The "fog" not only contains water, but also dissolves sulfuric acid, sulfate, sulfur dioxide, etc., and also causes contamination and serious corrosion of fans, heat exchangers and flues. Therefore, the purified gas is defogged before leaving the tower body through the device.

[0020] Furthermore, the ends of the first tower body 1 and the second tower body 2 that are close to each other are flange-sealed, and the ends of the second tower body 2 and the third tower body 3 that are close to each other are flange-sealed. The circulating water outlet end of the first tower body 1 is connected to the water pipe 12 through a circulating pump, and the other end of the water pipe 12 passes through the interior of the third tower body 3. The supply control of the water source is ensured by the setting of the circulating water pump.

[0021] Furthermore, the diverter pipes 13 are arrayed below the horizontal section of the water pipes 12, and the spacing between adjacent diverter pipes 13 is smaller than the spray diameter of the spray head 14; the spray heads 14 are arrayed below the diverter pipes 13, and the spacing between adjacent spray heads 14 is smaller than the spray diameter of the spray head 14; through the array distribution arrangement, it is ensured that the area below can be fully sprayed, thereby improving the contact effect with the exhaust gas and ensuring the purification effect of the device.

[0022] Furthermore, an inspection window 21 is provided on the outer wall of the second tower body 2, and a sealing cover 22 is connected to the outer wall of the inspection window 21 by bolts, and the interior of each inspection window 21 corresponds to a filling frame 4, and a feeding port 46 is provided on the filling frame 4 corresponding to the inspection window 21. A total of five groups of inspection windows 21 are provided, and adjacent inspection windows 21 are staggered on both sides of the second tower body 2, so as to facilitate the replacement of the filling inside the filling frame 4 and improve its convenience of use.

[0023] Furthermore, there are five packing frames 4, and the adjacent packing frames 4 are arranged in a staggered manner. The side of the packing frame 4 where the feeding port 46 is opened is fixedly connected to the inner wall of the second tower body 2. The inside of the packing frame 4 is filled with packing. The packing is arranged to purify the exhaust gas inside the packing frame 4. The gaps of the packing will continuously form a water film due to the infiltration of the spraying liquid above, so that when the gas rises, it will fully contact and react with the water film, thereby improving the purification effect of the exhaust gas. The packing frame 4 and the gas guide A guide hole is opened at the lowest point of the flow plate 45, and a guide pipe is connected below the guide hole, and the other end of the guide pipe is connected to a liquid baffle 47, and the liquid baffle 47 is connected to the upper surface of the lower liquid guide plate 41. Through the setting of this structure, the water source inside the upper filling frame 4 can be guided, so that after it is injected into the liquid baffle 47, it converges to the waterfall water flow between the liquid baffle 47 and the waterfall guide plate 48, ensuring the uniformity of its waterfall formation, thereby improving the adequacy of the contact between the exhaust gas and it.

[0024] Furthermore, a seepage hole 42 is opened on the upper surface of the liquid guide plate 41, and a water distribution baffle 43 is fixedly connected to the upper surface of the liquid guide plate 41, and the water distribution baffle 43 is located on the high end outer wall of the seepage hole 42, and the two ends of the water distribution baffle 43 are flared, and the seepage holes 42 are distributed in a staggered manner. The water distribution baffle 43 is used for diverting the water source. Through the setting of this structure, not only can the falling liquid be diverted, but also through the opening of the seepage holes 42, the water flow can be directly infiltrated, thereby forming a water film at the gap of the filler, thereby increasing the reaction effect of the exhaust gas and ensuring that the exhaust gas can fully react.

[0025] Furthermore, the gas guide plate 45 is evenly provided with air rise holes 49, and the diameter of the air rise holes 49 is smaller than the diameter of the seepage holes 42. The gas guide plate 45 is used to block and guide the rising exhaust gas, and a small amount of exhaust gas directly passes through the air rise holes 49 to the top of the liquid guide plate 41. Through the setting of this structure, the exhaust gas rises through the inside and outside of the filling frame 4 respectively, realizing the diversion treatment of the reaction, thereby avoiding a large exhaust gas content at the same position, thereby improving the reaction effect.

[0026] Furthermore, a waterfall guide plate 48 is fixedly connected to the inclined bottom end of the liquid guide plate 41, and a liquid baffle 47 is arranged above the waterfall guide plate 48. The edge of the waterfall guide plate 48 away from the liquid guide plate 41 is in an arc-shaped structure, and the cross-section of the waterfall guide plate 48 is in an L-shaped structure, and the inner wall of the vertical end of the waterfall guide plate 48 is inclined, and the water flow at the bottom of the waterfall guide plate 48 forms a waterfall shape. The interior of the liquid baffle 47 corresponding to the arc-shaped structure of the waterfall guide plate 48 is a hollow structure, and an overflow hole is opened below the liquid baffle 47, and the outer wall of the liquid baffle 47 is used to block the water flow. Through the mutual cooperation of the liquid baffle 47 and the waterfall guide plate 48, the water flow flows out between the liquid baffle 47 and the waterfall guide plate 48, and then forms a waterfall shape at the bottom of the waterfall guide plate 48, so that the S-shaped rising exhaust gas will fully contact and react with the waterfall-shaped water flow when flowing, thereby greatly improving the purification effect and reaction efficiency of the exhaust gas.

[0027] Working principle: The first tower body 1, the spray head 14 and the demister 31 used in the present application are all products that can be directly purchased on the market. Their principles and connection methods are all existing technologies well known to those skilled in the art, so they will not be repeated here. When the present invention is used, the outside of the air inlet pipe 11 is first connected to the air supply end, and then the circulating water pump of the water pipe 12 is started, so that the mixed liquid inside the air inlet pipe 11 is sprayed through the diverter pipe 13 and the spray head 14. At the same time, the gas introduced at the air inlet pipe 11 floats upward after entering the first tower body 1. When it contacts the lowest gas guide plate 45, part of the gas directly passes through the air riser hole 49 to the inside of the packing frame 4, and a large amount of gas passes through the guide plate 45. It moves upward through its open end and rises in an S shape. When the spraying liquid falls and contacts the uppermost liquid guide plate 41, part of the liquid directly enters the interior of the filling frame 4 through the seepage hole 42, mixes with the internal filler, and purifies the gas entering the filling frame 4. At the same time, the liquid above the liquid guide plate 41 is guided by the water distribution baffle 43 to the liquid baffle 47 and the waterfall guide plate 48. The liquid is blocked by the liquid baffle 47 and flows along the waterfall guide plate 48 to form a certain waterfall structure, so that the gas guided by the gas guide plate 45 can fully contact and react with the liquid in the waterfall structure during the rising process, thereby greatly improving the reaction efficiency and purification efficiency of the device.

[0028] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A wet pretreatment device for recovering hydrogen sulfide waste gas, characterized in that: include: A first tower body (1), wherein an air inlet end of the first tower body (1) is connected to an air inlet pipe (11), a water outlet end of the first tower body (1) is connected to a water pipe (12), and the other end of the water pipe (12) is connected to a flow diversion pipe (13), and spray heads (14) are evenly distributed on the lower surface of the flow diversion pipe (13); A second tower body (2), wherein the second tower body (2) is connected to the top of the first tower body (1), and the inner wall of the second tower body (2) is connected to a packing frame (4), the upper surface of the packing frame (4) is provided with a liquid guide plate (41), and the lower surface of the packing frame (4) is provided with a gas guide plate (45), and the liquid guide plate (41) and the gas guide plate (45) are both inclined, and most of the rising gas rises in an "S" shape through the blocking and guiding of the gas guide plate (45) and the packing frame (4); A third tower body (3), wherein the third tower body (3) is connected to the top of the second tower body (2), and a demister (31) is provided on the inner wall of the top end of the third tower body (3).

2. A wet pretreatment device for recovering hydrogen sulfide waste gas according to claim 1, characterized in that: The first tower body (1) and the second tower body (2) are connected in a flange sealing manner at one end close to each other, and the second tower body (2) and the third tower body (3) are connected in a flange sealing manner at one end close to each other. The circulating water outlet end of the first tower body (1) is connected to a water pipe (12) via a circulating pump, and the other end of the water pipe (12) passes through the interior of the third tower body (3).

3. A wet pretreatment device for recovering hydrogen sulfide waste gas according to claim 2, characterized in that: The diverter pipes (13) are arranged in an array below the horizontal section of the water pipe (12), and the spacing between adjacent diverter pipes (13) is smaller than the spray diameter of the spray head (14); spray heads (14) are arranged in an array below the diverter pipes (13), and the spacing between adjacent spray heads (14) is smaller than the spray diameter of the spray head (14).

4. A wet pretreatment device for recovering hydrogen sulfide waste gas according to claim 1, characterized in that: The outer wall of the second tower body (2) is provided with an inspection window (21), and the outer wall of the inspection window (21) is connected to a sealing cover (22) by bolts, and the interior of each inspection window (21) corresponds to a filling frame (4), and the filling frame (4) is provided with a feeding port (46) at a position corresponding to the inspection window (21). A total of five groups of inspection windows (21) are provided, and adjacent inspection windows (21) are arranged alternately on both sides of the second tower body (2).

5. A wet pretreatment device for recovering hydrogen sulfide waste gas according to claim 1, characterized in that: A total of five packing frames (4) are provided, and adjacent packing frames (4) are arranged in a staggered manner. A side of the packing frame (4) having a feeding port (46) is fixedly connected to the inner wall of the second tower body (2). The interior of the packing frame (4) is filled with packing. A flow guide hole is provided at the lowest point where the packing frame (4) and the gas guide plate (45) contact each other, and a flow guide pipe is connected below the flow guide hole. The other end of the flow guide pipe is connected to a liquid baffle (47), and the liquid baffle (47) is connected to the upper surface of the lower layer liquid guide plate (41).

6. A wet pretreatment device for recovering hydrogen sulfide waste gas according to claim 1, characterized in that: The upper surface of the liquid guide plate (41) is provided with seepage holes (42), the upper surface of the liquid guide plate (41) is fixedly connected with a water distribution baffle (43), the water distribution baffle (43) is located on the upper end outer wall of the seepage holes (42), and both ends of the water distribution baffle (43) are arranged in a flared shape, the seepage holes (42) are distributed in a staggered shape, and the water distribution baffle (43) is used for guiding water sources.

7. A wet pretreatment device for recovering hydrogen sulfide waste gas according to claim 6, characterized in that: The gas guide plate (45) is evenly provided with gas lifting holes (49), and the diameter of the gas lifting holes (49) is smaller than the diameter of the seepage holes (42). The gas guide plate (45) is used to block and guide rising exhaust gas, and a small amount of exhaust gas directly passes through the gas lifting holes (49) to the top of the liquid guide plate (41).

8. A wet pretreatment device for recovering hydrogen sulfide waste gas according to claim 6, characterized in that: The inclined bottom end of the liquid guide plate (41) is fixedly connected to a waterfall guide plate (48), and a liquid baffle (47) is arranged above the waterfall guide plate (48); the edge of the waterfall guide plate (48) away from the liquid guide plate (41) is in an arc-shaped structure, and the cross-section of the waterfall guide plate (48) is in an L-shaped structure, and the inner wall of the vertical end of the waterfall guide plate (48) is inclined, and the water flow at the bottom of the waterfall guide plate (48) forms a waterfall shape, and the interior of the liquid baffle (47) corresponding to the arc-shaped structure of the waterfall guide plate (48) is in a hollow structure, and an overflow hole is opened below the liquid baffle (47), and the outer wall of the liquid baffle (47) is used to block the water flow.

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