A tail gas treatment device for preparing zinc sulfide

Abstract

The present invention discloses a tail gas treatment device for preparing zinc sulfide, which relates to the technical field of tail gas treatment, including a tail gas absorption tank and a solution mixing kettle, wherein a first pipeline is arranged between the tail gas absorption tank and the solution mixing kettle, and the tail gas absorption tank includes an inner warehouse body and an outer warehouse body, wherein a rotating shaft is arranged in the inner warehouse body, and a spray plate and an air outlet plate are arranged on the rotating shaft in sequence from top to bottom, and a plurality of culture plates are arranged between the spray plate and the air outlet plate; a driving motor is installed on the top of the outer warehouse body, and the driving motor drives the rotating shaft to rotate. Thus, by combining the spray method with the biological absorption method, the hydrogen sulfide in the tail gas can be fully absorbed and utilized, and after testing, the absorption rate of hydrogen sulfide can reach more than 99.1%.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment, and in particular to a tail gas treatment device for preparing zinc sulfide. Background Art

[0002] At present, the main equipment for preparing high-quality infrared material zinc sulfide is the chemical vapor deposition furnace, which adopts chemical vapor deposition, referred to as CVD, with high-purity zinc and high-purity hydrogen sulfide gas as raw materials, high-purity inert gas argon as carrier gas, and graphite substrate as matrix. The chemical reaction in the chemical vapor deposition furnace is used to obtain zinc sulfide products. The use of chemical vapor deposition to produce zinc sulfide inevitably requires the use of hydrogen sulfide gas as a raw material. Hydrogen sulfide is a flammable and highly toxic gas that has a strong irritating effect on mucous membranes and is extremely harmful to human health. Hydrogen sulfide leakage will cause serious pollution to the surrounding environment.

[0003] Most of the existing zinc sulfide tail gas treatment methods are spray methods, that is, using alkaline solution as a spray agent to spray and wash the tail gas, and adjusting the contact area between the tail gas and the spray agent by adjusting the spray equipment to remove hydrogen sulfide in the tail gas to the greatest extent. This method can remove more than 90% of zinc sulfide in the tail gas, but some hydrogen sulfide still escapes into the air, causing air pollution. Summary of the invention

[0004] In view of the above defects, the purpose of the present invention is to provide a tail gas treatment device for preparing zinc sulfide, aiming to solve the problem that it is difficult to recover hydrogen sulfide in the tail gas in the prior art.

[0005] In order to solve the above technical problems, the technical solution of the present invention is:

[0006] A tail gas treatment device for preparing zinc sulfide, comprising a tail gas absorption tank, an alkaline solution storage tank, a separator, a filter press, a solution mixing kettle and a tail gas filter, wherein a first pipeline is arranged between the tail gas absorption tank and the solution mixing kettle, a second pipeline is arranged between the tail gas absorption tank and the separator, a third pipeline is arranged between the separator and the solution mixing kettle, a fourth pipeline is arranged between the alkaline solution storage tank and the solution mixing kettle, a fifth pipeline is arranged between the separator and the filter press, a sixth pipeline is arranged between the tail gas absorption tank and the tail gas filter, a seventh pipeline is arranged between the filter press and the solution mixing kettle, the tail gas absorption tank comprises an inner warehouse body and an outer warehouse body, a rotating shaft is arranged in the inner warehouse body, a spray plate and an air outlet plate are arranged on the rotating shaft in sequence from top to bottom, and a plurality of culture plates are arranged between the spray plate and the air outlet plate;

[0007] The rotating shaft includes a hollow section and a connecting section, one end of the connecting section is rotatably connected to the bottom of the inner warehouse body, and the other end of the connecting section is connected to the hollow section, and the hollow section is sequentially provided with a first cavity and a second cavity from the outside to the inside, the top of the first cavity is rotatably connected to a first adapter, the bottom of the first cavity is connected to a spray plate, and the end of the first pipeline away from the solution mixing kettle is connected to the first adapter; the top of the second cavity is rotatably connected to a second adapter, the bottom of the second cavity is connected to an air outlet plate, the side wall of the second cavity is rotatably connected to the first adapter, and the side wall of the second adapter is connected to an exhaust gas pipeline; a driving motor is installed on the top of the outer warehouse body, and the driving motor drives the rotating shaft to rotate.

[0008] Wherein, the culture plate comprises a fixing ring and a connecting plate, the connecting plate is arranged around a rotating shaft, a plurality of arc-shaped fixing arms are arranged between the fixing ring and the connecting plate, and a plurality of culture balls are arranged between adjacent arc-shaped fixing arms.

[0009] Wherein, a connecting shaft is arranged between the culture ball and the arc-shaped fixed arm, one end of the connecting shaft is rotatably connected to the culture ball, and the other end of the connecting shaft is connected to the arc-shaped fixed arm.

[0010] The culture ball comprises a first hemisphere and a second hemisphere which are arranged opposite to each other. A plurality of through holes are arranged on the outer wall of the first hemisphere. The first hemisphere is made of a corrosion-resistant transparent material. The first hemisphere and the second hemisphere have the same structure.

[0011] An attachment area is provided on the inner wall of the first hemisphere, and the attachment area includes a basalt layer and an alginate hydrogel layer. The basalt layer is located between the alginate hydrogel layer and the inner wall of the first hemisphere, and a bacterial community is coated on a side of the alginate hydrogel layer away from the basalt layer.

[0012] The wall thickness of the first hemisphere is a, the thickness of the basalt layer is b, the thickness of the alginate hydrogel layer is c, and a:b:c=1:0.08-0.5:0.05-0.3.

[0013] Among them, an attachment ball is arranged in the culture ball, the diameter of the attachment ball is larger than the aperture of the through hole, and the attachment ball is sequentially provided with a support body, a basalt layer and an alginate hydrogel layer from the inside to the outside, and the side of the alginate hydrogel layer away from the basalt layer is coated with a bacterial community.

[0014] Among them, it also includes a culture liquid storage tank, and an eighth pipeline is arranged between the tail gas absorption tank and the culture liquid storage tank.

[0015] Among them, the rotating shaft also includes a third cavity, the third cavity is located between the first cavity and the second cavity, a third adapter is arranged between the first adapter and the second adapter, the end of the third cavity away from the air outlet disk is rotatably connected to the third adapter, one end of the eighth pipe is connected to the culture fluid storage tank, the other end of the eighth pipe is connected to the third adapter, a plurality of guide pipes are arranged on the culture disk, the guide pipes are arranged around the third cavity, one end of the guide pipe is connected to the third cavity, the other end of the guide pipe is connected to the fixing ring, and a plurality of guide heads are arranged on the side of the guide pipe facing the air outlet disk.

[0016] The fixing ring is hollow, and a plurality of guide heads are also arranged on the side of the fixing ring facing the air outlet plate. One end of the guide pipe is connected to the third cavity, and the other end of the guide pipe is connected to the fixing ring.

[0017] After adopting the above technical solution, the beneficial effects of the present invention are:

[0018] First, by combining the spraying method with the biological absorption method, the hydrogen sulfide in the exhaust gas can be fully absorbed and utilized. According to tests, the absorption rate of hydrogen sulfide can reach more than 99.1%. Second, the spray plate rotates with the rotating shaft, which allows the mixed liquid sprayed by the spray plate to be thrown around, thereby covering a larger area and fully contacting the exhaust gas. Third, the culture plate rotates with the rotating shaft, so that the bacterial flora on the culture plate can fully contact with the hydrogen sulfide dissolved in the mixed liquid, thereby accelerating the decomposition rate of hydrogen sulfide. At the same time, the culture plate also plays a stirring role. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an exhaust gas treatment device;

[0020] Figure 2 It is a structural schematic diagram of the tail gas absorption tank;

[0021] Figure 3 is the structural diagram of the rotating shaft;

[0022] Figure 4 is a top view of the culture dish;

[0023] Figure 5 This is a structural diagram of the culture ball;

[0024] Figure 6 is a partial cross-sectional view of a culture ball;

[0025] Figure 7 is a structural diagram of the culture ball in Example 2;

[0026] Figure 8 is a cross-sectional view of the attached ball;

[0027] Fig. 9 for Figure 2 A partial enlarged view of a;

[0028] Fig.10 This is a top sectional view of the air outlet disk.

[0029] In the figure: 1- tail gas absorption tank, 101- first pipeline, 102- second pipeline, 103- third pipeline, 104- fourth pipeline, 105- fifth pipeline, 106- sixth pipeline, 107- seventh pipeline, 108- eighth pipeline, 11- inner warehouse, 111- annular sealing tube, 112- annular fill light, 113- reflecting surface, 114- heat conduction plate, 12- outer warehouse, 13- rotating shaft, 131- hollow section, 1311- first cavity, 1312- second cavity, 1313- third cavity, 132- connecting section, 133- first adapter, 134- second adapter, 135- tail gas pipeline, 136- third adapter, 14- spray plate, 141- spray head, 142- spray cavity , 15-culture plate, 151-fixing ring, 152-connecting plate, 153-arc-shaped fixed arm, 154-culture ball, 1541-first hemisphere, 1542-second hemisphere, 1543-through hole, 1544-basalt layer, 1545-alginate hydrogel layer, 1546-attachment ball, 1547-support body, 155-connecting shaft, 156-guide pipe, 1561-guide head, 16-gas outlet plate, 161-annular limiting pipe, 162-limiting channel, 163-jet head, 17-drive motor, 171-drive wheel, 172-power wheel, 18-heating pipe, 2-solution mixing kettle, 3-alkaline solution storage tank, 4-separator, 5-filter press equipment, 6-exhaust filter, 7-culture solution storage tank. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0031] Embodiment 1:

[0032] In order to remove hydrogen sulfide from tail gas to the greatest extent, this scheme adopts a combination of spraying method and biological absorption method. Figure 1-6 As shown, a tail gas treatment device for preparing zinc sulfide includes a tail gas absorption tank 1, an alkaline solution storage tank 3, a separator 4, a filter press 5, a solution mixing kettle 2 and a tail gas filter 6, wherein the tail gas absorption tank 1 is used to recover the tail gas, and the alkaline solution storage tank 3 is used to store and provide alkaline solution for the solution mixing kettle 2.

[0033] Since hydrogen sulfide will generate sulfur element after biological treatment, and sulfur element will not dissolve in water or dilute alkali solution, the sulfur element will precipitate. In order to avoid the accumulation of sulfur element, we need to recycle it regularly. For this reason, the present scheme introduces a separator 4. The separator 4 collects the mixed solution from the tail gas absorption tank 1. Since the mixed solution contains unreacted alkali solution and biological flora, it needs to be recycled. Therefore, the separator 4 separates the sulfur element in the mixed solution, and at the same time, the mixed solution obtained after filtration is sent to the solution mixing kettle 2 for standby use. The sulfur element will be sent to the filter press 5 for filter pressing and drying.

[0034] In order to facilitate the absorption of hydrogen sulfide, this scheme uses alkaline solution as a spraying agent. To this end, this scheme introduces an alkaline solution storage tank 3 to provide alkaline solution for the tail gas absorption tank 1. In order to reduce costs, we need to reuse the recovered mixed solution. Since the pH value in the mixed solution is close to neutral, in order to ensure the absorption efficiency of hydrogen sulfide, we need to configure the alkaline solution with the mixed solution, and then send the configured solution to the tail gas absorption tank 1. To this end, this scheme introduces a solution mixing kettle 2.

[0035] Although the hydrogen sulfide in the tail gas is greatly reduced by the spraying method and the biological absorption method, there is still a small amount of hydrogen sulfide that has not been absorbed and processed. For this reason, this scheme introduces a tail gas filter 6. The tail gas filter 6 is provided with a molecular sieve or activated carbon, and the tail gas is further filtered by a physical absorption method to ensure that the tail gas meets the emission standards.

[0036] A first pipeline 101 is arranged between the tail gas absorption tank 1 and the solution mixing kettle 2, a second pipeline 102 is arranged between the tail gas absorption tank 1 and the separator 4, a third pipeline 103 is arranged between the separator 4 and the solution mixing kettle 2, a fourth pipeline 104 is arranged between the alkaline solution storage tank 3 and the solution mixing kettle 2, a fifth pipeline 105 is arranged between the separator 4 and the filter press equipment 5, a sixth pipeline 106 is arranged between the tail gas absorption tank 1 and the tail gas filter 6, and a seventh pipeline 107 is arranged between the filter press equipment 5 and the solution mixing kettle 2.

[0037] The purpose of the first pipeline 101 is to deliver the solution configured in the solution mixing kettle 2 to the exhaust gas absorption tank 1; the function of the second pipeline 102 is to deliver the mixed solution in the exhaust gas absorption tank 1 to the separator 4 for filtration; the function of the third pipeline 103 is to deliver the mixed solution filtered in the separator 4 to the solution mixing kettle 2 for standby; the function of the fourth pipeline 104 is to guide the alkaline solution in the alkaline solution storage tank 3 to the solution mixing kettle 2; the function of the fifth pipeline 105 is to deliver the crystal particles filtered in the separator 4 to the filter press equipment 5 for filter pressing and drying; the function of the sixth pipeline 106 is to guide the exhaust gas treated by the exhaust absorption tank 1 to the exhaust filter 6, thereby realizing secondary filtration of the exhaust gas; the function of the seventh pipeline 107 is to deliver the filtrate obtained by the filter press equipment 5 to the solution mixing kettle 2 for reconfiguration and use.

[0038] In order to facilitate the tail gas absorption tank 1 to absorb hydrogen sulfide in the tail gas, the tail gas absorption tank 1 includes an inner warehouse body 11 and an outer warehouse body 12. The inner warehouse body 11 is provided with a rotating shaft 13. The rotating shaft 13 is provided with a spray plate 14 and an air outlet plate 16 from top to bottom. A number of culture plates 15 are provided between the spray plate 14 and the air outlet plate 16. The spray plate 14 is used to guide the mixed liquid configured in the solution mixing kettle 2 into the inner warehouse body 11, and the air outlet plate 16 guides the tail gas into the inner warehouse body 11. The mixed liquid sprays downward, and when the mixed liquid submerges the culture plate 15, the air outlet plate 16 starts to work. The purpose of this design is to use the mixed liquid to activate the bacterial colony on the culture plate 15 so that the bacterial colony can reproduce rapidly.

[0039] At this time, when the tail gas moves upward, it will first pass through the mixed liquid. Since the mixed liquid is alkaline, the mixed liquid will absorb a large amount of hydrogen sulfide in the tail gas. At the same time, the bacterial flora on the culture plate 15 begins to oxidize hydrogen sulfide into elemental sulfur, which reduces the concentration of hydrogen sulfide in the mixed liquid, and then allows the hydrogen sulfide in the tail gas to be continuously dissolved in the mixed liquid. A part of the tail gas continues to rise through the mixed liquid. At this time, the spray plate 14 sprays the mixed liquid downward, and the mixed liquid is in a mist form. After the tail gas comes into contact with the mist mixed liquid, the unabsorbed hydrogen sulfide in the tail gas will be absorbed again by the mist mixed liquid. This design minimizes the hydrogen sulfide content in the tail gas and reduces the degree of harm of the tail gas to the environment.

[0040] In order to facilitate the delivery of the mixed liquid and exhaust gas to the inner warehouse body 11, the rotating shaft 13 includes a hollow section 131 and a connecting section 132, one end of the connecting section 132 is rotatably connected to the bottom of the inner warehouse body 11, and the other end of the connecting section 132 is connected to the hollow section 131, and the hollow section 131 is sequentially provided with a first cavity 1311 and a second cavity 1312 from the outside to the inside, the top of the first cavity 1311 is rotatably connected to the first adapter 133, the bottom of the first cavity 1311 is connected to the spray plate 14, and the end of the first pipeline 101 away from the solution mixing kettle 2 is connected to the first adapter 133; the top of the second cavity 1312 is rotatably connected to the second adapter 134, the bottom of the second cavity 1312 is connected to the gas outlet plate 16, the side wall of the second cavity 1312 is rotatably connected to the first adapter 133, and the side wall of the second adapter 134 is connected to the exhaust gas pipeline 135.

[0041] The mixed liquid in the solution mixing kettle 2 reaches the first cavity 1311 through the first pipeline 101 and the first adapter 133 in sequence, and then reaches the spray plate 14 along the first cavity 1311 .

[0042] The exhaust gas will reach the second adapter 134 along the exhaust gas pipeline 135 , and then reach the gas outlet plate 16 along the second adapter 134 and the second cavity 1312 .

[0043] In order to facilitate the maximum absorption of hydrogen sulfide, we need to make the tail gas and the mixed liquid distributed in the largest range and reduce the concentration of the tail gas per unit area. For this purpose, a driving motor 17 is installed on the top of the outer warehouse body 12, and the driving motor 17 drives the rotating shaft 13 to rotate. Since the first adapter 133 and the second adapter 134 are both rotatably connected to the rotating shaft 13, the first adapter 133 and the second adapter 134 will not hinder the rotation of the rotating shaft 13. When the driving motor 17 drives the rotating shaft 13 to rotate, the spray plate 14, the culture plate 15 and the gas outlet plate 16 will rotate together with the rotating shaft 13. During the rotation process, the tail gas sent out by the gas outlet plate 16 can spirally rise, thereby covering a larger area; the culture plate 15 is similar to a stirring shaft when rotating, which will further disperse the mixed liquid and tail gas; and the mixed liquid sprayed by the spray plate 14 will be evenly scattered around, thereby covering a larger range and contacting the tail gas to the greatest extent, ensuring the absorption efficiency of hydrogen sulfide.

[0044] There are many choices of bacteria on the culture tray 15, such as mud-dwelling green bacteria, Thiobacillus thiosulfatus, Thiobacillus thiosulfatus, Thiobacillus denitrifying, etc. It is worth noting that when using mud-dwelling green bacteria, it is necessary to provide sunlight, carbon dioxide, inorganic nutrients and an anaerobic environment for the inner chamber 11.

[0045] In order to facilitate the placement of bacterial colonies, the culture plate 15 includes a fixing ring 151 and a connecting plate 152, the connecting plate 152 is arranged around the rotating shaft 13, a plurality of arc-shaped fixing arms 153 are arranged between the fixing ring 151 and the connecting plate 152, and a plurality of culture balls 154 are arranged between adjacent arc-shaped fixing arms 153. Each culture ball 154 is equivalent to a culture dish, and the bacterial colony is located inside the culture ball 154. When the mixed liquid submerges the culture ball 154, the bacterial colony inside the culture ball 154 will be activated.

[0046] The internal space of the culture ball 154 is limited, so after the bacterial colony multiplies in large quantities, we need to throw part of the bacterial colony to the outside so that the bacterial colony can cover a larger area. For this purpose, a connecting shaft 155 is provided between the culture ball 154 and the arc-shaped fixed arm 153, one end of the connecting shaft 155 is rotatably connected to the culture ball 154, and the other end of the connecting shaft 155 is connected to the arc-shaped fixed arm 153. The mixed liquid and exhaust gas will impact the culture ball 154 during the flow process, and the culture ball 154 will rotate at this time. During the rotation process, the bacterial colony in the culture ball 154 will be thrown around.

[0047] In order to facilitate placing the bacterial colony inside the culture ball 154, the culture ball 154 includes a first hemisphere 1541 and a second hemisphere 1542 that are arranged opposite to each other. A plurality of through holes 1543 are arranged on the outer wall of the first hemisphere 1541. The first hemisphere 1541 is made of a corrosion-resistant transparent material, and the first hemisphere 1541 and the second hemisphere 1542 have the same structure. The through holes 1543 have multiple functions, one is to leave space for communication between the inside and the outside world; the other is to guide external light to enter, so as to accelerate the reproduction and working speed of the bacterial colony.

[0048] In this solution, the first hemisphere 1541 and the second hemisphere 1542 can be connected in a variety of ways, such as bolt connection, bonding, plug-in connection, etc.

[0049] In order to facilitate the rapid reproduction and growth of the bacterial colony in the culture ball 154, an attachment area is provided on the inner wall of the first hemisphere 1541, and the attachment area includes a basalt layer 1544 and an alginate hydrogel layer 1545. The basalt layer 1544 is located between the alginate hydrogel layer 1545 and the inner wall of the first hemisphere 1541, and the alginate hydrogel layer 1545 is coated with a bacterial colony on one side away from the basalt layer 1544. The alginate hydrogel layer 1545 contains inorganic nutrients, which provides preliminary assistance for the activation and reproduction of the bacterial colony. The basalt layer 1544 is a porous material, and this design leaves sufficient space for the reproduction of the bacterial colony and facilitates the attachment of the bacterial colony.

[0050] Preferably, the wall thickness of the first hemisphere 1541 is a, the thickness of the basalt layer 1544 is b, the thickness of the alginate hydrogel layer 1545 is c, and a:b:c=1:0.08-0.5:0.05-0.3. This design ensures that the bacterial colony can obtain sufficient nutrients during the reproduction period, while ensuring that there is enough space inside the culture ball 154.

[0051] Embodiment 2:

[0052] In Example 1, the bacterial colony is coated on the inner wall of the culture ball 154, which is relatively complicated. Figure 7-9 As shown, the culture ball 154 is provided with an attachment ball 1546, the diameter of which is larger than the aperture of the through hole 1543, and the attachment ball 1546 is provided with a support body 1547, a basalt layer 1544 and an alginate hydrogel layer 1545 in sequence from the inside to the outside, and the alginate hydrogel layer 1545 is coated with a bacterial colony on one side away from the basalt layer 1544. This design only requires batch production of the attachment balls 1546 and then encapsulation thereof in the culture ball 154, eliminating the step of coating the bacterial colony on the inner wall of the first hemisphere 1541 and the second hemisphere 1542, and the overall operation is simpler and faster.

[0053] Since the culture ball 154 is made of transparent material, this design enables the bacterial colony to obtain sufficient light in the early stage of reproduction, thereby accelerating the reaction and working speed of the bacterial colony.

[0054] Moreover, when the culture ball 154 rotates, the attached ball 1546 will collide with the inner wall of the culture ball 154, so that part of the bacterial colony on the attached ball 1546 will fall off due to the collision. This part of the bacterial colony will enter the mixed liquid to reproduce and work, thereby expanding the distribution range of the bacterial colony.

[0055] Embodiment 3:

[0056] In Example 1 and Example 2, the early reproduction of the bacterial colony depends on the nutrients provided by the alginate hydrogel layer 1545, but when the nutrients are exhausted, the sulfur fixation work of the bacterial colony will also be affected.

[0057] In this regard, Figure 1 , Figure 2 , Figure 3 , Fig. 9 , Fig.10As shown, it also includes a culture solution storage tank 7, and an eighth pipeline 108 is arranged between the tail gas absorption tank 1 and the culture solution storage tank 7. The nutrient solution in the culture solution storage tank 7 will be configured with different nutrient solutions according to the different strains. Still taking the mud-dwelling green bacteria as an example, in order to ensure its working efficiency, the carbon dioxide content in the nutrient solution is high and the oxygen content is low. At the same time, the nutrient solution needs to be rich in animal protein, nitrogen, phosphorus, potassium and various trace elements. If necessary, it is also necessary to separately supplement carbon dioxide into the inner warehouse body 11 through the eighth pipeline 108 to maintain the carbon source required for the mud-dwelling green bacteria to work.

[0058] In order to facilitate the delivery of the nutrient solution in the culture solution storage tank 7 to the inner storage body 11, the rotating shaft 13 also includes a third cavity 1313, and the third cavity 1313 is located between the first cavity 1311 and the second cavity 1312. A third adapter 136 is arranged between the first adapter 133 and the second adapter 134. One end of the third cavity 1313 away from the air outlet plate 16 is rotatably connected to the third adapter 136, one end of the eighth pipe 108 is connected to the culture solution storage tank 7, and the other end of the eighth pipe 108 is connected to the third adapter 136. A plurality of guide pipes 156 are arranged on the culture plate 15, and the guide pipes 156 are arranged around the third cavity 1313. One end of the guide pipe 156 is connected to the third cavity 1313, and the other end of the guide pipe 156 is connected to the fixing ring 151. A plurality of guide heads 1561 are arranged on the side of the guide pipe 156 facing the air outlet plate 16.

[0059] The eighth pipeline 108 delivers the nutrient solution in the culture solution storage tank 7 to the third adapter 136, and then the third adapter 136 delivers the nutrient solution to the guide pipeline 156 through the third cavity 1313, and then the guide pipeline 156 is discharged into the inner warehouse body 11 by the guide head 1561. This allows the nutrient solution to quickly reach the culture ball 154, accelerating the absorption rate of the bacterial colony in the culture ball 154.

[0060] Preferably, the fixing ring 151 is hollow, and a plurality of guide heads 1561 are also provided on one side of the fixing ring 151 facing the gas outlet plate 16. One end of the guide pipe 156 is connected to the third cavity 1313, and the other end of the guide pipe 156 is connected to the fixing ring 151. The fixing ring 151 expands the distribution range of the nutrient solution, so that the bacterial colony separated from the culture ball 154 can also obtain the nutrients needed for survival.

[0061] When the bacterial flora used in this scheme is photosynthetic bacteria, we need to supplement light to ensure its working efficiency. To this end, a number of annular sealing tubes 111 and a number of reflecting surfaces 113 are sequentially arranged from top to bottom in the inner warehouse body 11. The annular sealing tube 111 is made of corrosion-resistant transparent material. An annular supplementary light 112 is arranged in the annular sealing tube 111, and the reflecting surface 113 is located between adjacent annular sealing tubes 111. The annular supplementary light 112 can achieve a large range of light distribution. At the same time, when the light reaches the reflecting surface 113, the reflecting surface 113 will reflect the light, which further expands the range of light, so that each culture ball 154 on the culture tray 15 can obtain light, thereby ensuring the working efficiency of the bacterial flora in the culture ball 154.

[0062] Preferably, the side of the annular sealing tube 111 facing the rotating shaft 13 is an arc-shaped surface, and the convex surface of the arc-shaped surface faces the rotating shaft 13. The convex surface will form a convex lens effect, causing the light to diverge, thereby ensuring that the light can cover a larger range.

[0063] In order to facilitate the heat dissipation of the annular fill light 112, a heat conducting plate 114 is provided at one end of the annular fill light 112 away from the annular sealing tube 111, and the heat conducting plate 114 is heat-conductingly connected to the outer wall of the inner warehouse body 11. Since the mixed liquid in the inner warehouse body 11 is in a flowing state, the mixed liquid functions as a cooling medium, which can continuously take away the heat on the inner wall of the inner warehouse body 11, thereby accelerating the heat dissipation efficiency of the heat conducting plate 114.

[0064] In order to facilitate the bacterial flora in this solution to work normally in autumn and winter, a heating pipe 18 is provided between the inner warehouse body 11 and the outer warehouse body 12, and the heating pipe 18 is arranged around the inner warehouse body 11. In order to facilitate heat preservation, heat preservation material can also be filled between the outer warehouse body 12 and the inner warehouse body 11.

[0065] In order to facilitate the gas outlet disc 16 to send the exhaust gas into the inner chamber 11, the gas outlet disc 16 includes an annular limiting pipe 161 and a plurality of limiting channels 162, one end of the limiting channel 162 is connected to the second cavity 1312, and the other end of the limiting channel 162 is connected to the annular limiting pipe 161, and a plurality of jet heads 163 are arranged on the side of the annular limiting pipe 161 away from the spray disc 14. This design makes the gas outlet disc 16 similar to a stirrer, so that it can also play a stirring function in the process of exhaust gas discharge.

[0066] In order to facilitate the delivery of the mixed liquid to the inner warehouse body 11 , a plurality of spray heads 141 are arranged at the bottom of the spray plate 14 . A spray cavity 142 is arranged in the spray plate 14 . The spray cavity 142 is connected to the first cavity 1311 , and the spray head 141 is connected to the spray cavity 142 .

[0067] In order to ensure relative stability among the first cavity 1311 , the second cavity 1312 , and the third cavity 1313 , a plurality of reinforcing ribs are provided between the first cavity 1311 and the third cavity 1313 . Similarly, a plurality of reinforcing ribs are also provided between the third cavity 1313 and the second cavity 1312 .

[0068] In this solution, a driving wheel 171 is provided on the outer wall of the rotating shaft 13, and a power wheel 172 is provided at the power end of the driving motor 17. The driving wheel 171 and the power wheel 172 are connected by a belt.

[0069] In summary, the advantages of this solution are: First, by combining the spraying method with the biological absorption method, the hydrogen sulfide in the tail gas can be fully absorbed and utilized. After testing, the absorption rate of hydrogen sulfide can reach more than 99.1%. Second, the spray plate 14 rotates with the rotating shaft 13, which allows the mixed liquid sprayed by the spray plate 14 to be thrown around, thereby covering a larger area, so as to fully contact with the tail gas. Third, the culture plate 15 rotates with the rotating shaft 13, so that the bacterial flora on the culture plate 15 can fully contact with the hydrogen sulfide dissolved in the mixed liquid, thereby accelerating the decomposition rate of hydrogen sulfide. At the same time, the culture plate 15 also plays a stirring role.

[0070] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. A tail gas treatment device for preparing zinc sulfide, comprising a tail gas absorption tank (1), an alkaline solution storage tank (3), a separator (4), a filter press (5), a solution mixing kettle (2) and a tail gas filter (6), wherein a first pipeline (101) is arranged between the tail gas absorption tank (1) and the solution mixing kettle (2), a second pipeline (102) is arranged between the tail gas absorption tank (1) and the separator (4), a third pipeline (103) is arranged between the separator (4) and the solution mixing kettle (2), a fourth pipeline (104) is arranged between the alkaline solution storage tank (3) and the solution mixing kettle (2), a fifth pipeline (105) is arranged between the separator (4) and the filter press (5), a sixth pipeline (106) is arranged between the tail gas absorption tank (1) and the tail gas filter (6), and a seventh pipeline (107) is arranged between the filter press (5) and the solution mixing kettle (2), characterized in that: The tail gas absorption tank (1) comprises an inner chamber (11) and an outer chamber (12); a rotating shaft (13) is arranged in the inner chamber (11); a spray plate (14) and an air outlet plate (16) are arranged on the rotating shaft (13) in order from top to bottom; and a plurality of culture plates (15) are arranged between the spray plate (14) and the air outlet plate (16); The rotating shaft (13) comprises a hollow section (131) and a connecting section (132); one end of the connecting section (132) is rotatably connected to the bottom of the inner bin body (11); the other end of the connecting section (132) is connected to the hollow section (131); the hollow section (131) is provided with a first cavity (1311) and a second cavity (1312) in sequence from the outside to the inside; the top of the first cavity (1311) is rotatably connected to a first adapter (133); the bottom of the first cavity (1311) is in communication with a spray plate (14); the first pipe (10 1) one end away from the solution mixing kettle (2) is connected to the first adapter (133); the top of the second cavity (1312) is rotatably connected to the second adapter (134); the bottom of the second cavity (1312) is communicated with the gas outlet plate (16); the side wall of the second cavity (1312) is rotatably connected to the first adapter (133); the side wall of the second adapter (134) is connected to the exhaust gas pipeline (135); a driving motor (17) is installed on the top of the outer chamber (12); the driving motor (17) drives the rotating shaft (13) to rotate; The culture plate (15) comprises a fixing ring (151) and a connecting plate (152); the connecting plate (152) is arranged around the rotating shaft (13); a plurality of arc-shaped fixing arms (153) are arranged between the fixing ring (151) and the connecting plate (152); and a plurality of culture balls (154) are arranged between adjacent arc-shaped fixing arms (153); A connecting shaft (155) is provided between the culture ball (154) and the arc-shaped fixed arm (153); one end of the connecting shaft (155) is rotatably connected to the culture ball (154), and the other end of the connecting shaft (155) is connected to the arc-shaped fixed arm (153); The culture ball (154) comprises a first hemisphere (1541) and a second hemisphere (1542) which are arranged opposite to each other. A plurality of through holes (1543) are arranged on the outer wall of the first hemisphere (1541). The first hemisphere (1541) is made of a corrosion-resistant transparent material. The first hemisphere (1541) and the second hemisphere (1542) have the same structure. A plurality of annular sealing tubes (111) and a plurality of reflecting surfaces (113) are sequentially arranged in the inner chamber body (11) from top to bottom; the annular sealing tube (111) is made of a corrosion-resistant transparent material; an annular fill light (112) is arranged in the annular sealing tube (111); and the reflecting surface (113) is located between adjacent annular sealing tubes (111).

2. A tail gas treatment device for preparing zinc sulfide according to claim 1, characterized in that: An attachment area is provided on the inner wall of the first hemisphere (1541), and the attachment area includes a basalt layer (1544) and an alginate hydrogel layer (1545). The basalt layer (1544) is located between the alginate hydrogel layer (1545) and the inner wall of the first hemisphere (1541), and a bacterial colony is coated on a side of the alginate hydrogel layer (1545) away from the basalt layer (1544).

3. A tail gas treatment device for preparing zinc sulfide according to claim 2, characterized in that: The wall thickness of the first hemisphere (1541) is a, the thickness of the basalt layer (1544) is b, the thickness of the alginate hydrogel layer (1545) is c, and a:b:c=1:0.08-0.5:0.05-0.

3.

4. A tail gas treatment device for preparing zinc sulfide according to claim 1, characterized in that: An attachment ball (1546) is arranged inside the culture ball (154), the diameter of the attachment ball (1546) is larger than the aperture of the through hole (1543), and the attachment ball (1546) is provided with a support body (1547), a basalt layer (1544) and an alginate hydrogel layer (1545) in sequence from the inside to the outside, and a bacterial colony is coated on a side of the alginate hydrogel layer (1545) away from the basalt layer (1544).

5. The tail gas treatment device for preparing zinc sulfide according to claim 1, characterized in that: It also comprises a culture fluid storage tank (7), and an eighth pipeline (108) is arranged between the tail gas absorption tank (1) and the culture fluid storage tank (7).

6. A tail gas treatment device for preparing zinc sulfide according to claim 5, characterized in that: The rotating shaft (13) further comprises a third cavity (1313), wherein the third cavity (1313) is located between the first cavity (1311) and the second cavity (1312), a third adapter (136) is provided between the first adapter (133) and the second adapter (134), an end of the third cavity (1313) away from the gas outlet plate (16) is rotatably connected to the third adapter (136), one end of the eighth pipeline (108) is connected to the culture medium storage tank (7), and the third adapter (136) is connected to the gas outlet plate (16). The other end of the eight pipes (108) is connected to the third adapter (136), and a plurality of guide pipes (156) are arranged on the culture plate (15), and the guide pipes (156) are arranged around the third cavity (1313). One end of the guide pipe (156) is connected to the third cavity (1313), and the other end of the guide pipe (156) is connected to the fixing ring (151), and a plurality of guide heads (1561) are arranged on the side of the guide pipe (156) facing the air outlet plate (16).

7. A tail gas treatment device for preparing zinc sulfide according to claim 6, characterized in that: The fixing ring (151) is hollow, and a plurality of guide heads (1561) are also provided on one side of the fixing ring (151) facing the air outlet plate (16). One end of the guide pipe (156) is connected to the third cavity (1313), and the other end of the guide pipe (156) is connected to the fixing ring (151).

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