Sewage desulfurization device and use method thereof

Abstract

The invention relates to the field of sewage desulfurization devices, and provides a sewage desulfurization device and a use method thereof in order to solve the problems that an existing desulfurization device is poor in mass transfer effect and difficult to deal with scenes with large inflow water quality fluctuation, and the sewage desulfurization device comprises a shell, an upper mounting plate, an upper annular filler, a lower mounting plate, a lower annular filler, a first pipe body and a second pipe body, the upper mounting plate is rotationally connected with the shell, and a gap is reserved between the edge of the upper mounting plate and the inner wall of the shell; the lower mounting plate is connected with the inner wall of the shell; one end of the first pipe body is connected with the upper mounting plate; the other end of the first pipe body penetrates through the lower mounting plate and is rotatably connected with the lower mounting plate, the first pipe body is provided with a side hole, and the side hole is communicated with the first mass transfer area; and the second pipe body is rotationally connected with the bottom end of the first pipe body. According to the device, sewage can be continuously sheared through the upper annular filler, the mass transfer effect of gas and liquid is enhanced, the mass transfer path of the sewage and the gas can be increased, and then the desulfurization effect is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater desulfurization equipment, and more specifically, to a wastewater desulfurization equipment and its usage method. Background Technology

[0002] The chemical, petrochemical, and pharmaceutical industries inevitably generate sulfur-containing wastewater during production. Sulfur compounds in this wastewater are toxic and corrosive, and also have a foul odor, causing significant environmental impact. More seriously, they corrode wastewater treatment structures, potentially contaminating drinking water sources. Therefore, it is essential to purify this sulfur-containing wastewater. The concentration of sulfur compounds varies depending on the industry, requiring different treatment methods.

[0003] Sulfur and its compounds, such as hydrogen sulfide, sulfates, and organic sulfides, naturally exist in oil and gas reservoirs. During extraction, these sulfur-containing substances are carried to the surface along with crude oil, natural gas, and formation water, directly entering the wastewater system. Furthermore, oilfields commonly employ water injection development methods, where sulfates in the injected water or formation water are reduced to sulfur ions and hydrogen sulfide by SRB (sulfur-reducing organic water) under anaerobic conditions. Therefore, oil and gas field wastewater contains a large amount of sulfur, requiring desulfurization treatment.

[0004] Existing desulfurization devices employ various principles, such as chemical sedimentation, alkaline absorption, biological desulfurization, and steam stripping. Among these, steam stripping desulfurization is based on gas-liquid phase equilibrium and mass transfer theory. By introducing a stripping medium, such as steam, into the device, the partial pressure difference between the components in the gas and liquid phases causes volatile substances to transfer from the liquid phase to the gas phase, achieving separation. However, existing desulfurization devices suffer from poor mass transfer efficiency and are ill-suited for scenarios with significant fluctuations in influent water quality. Summary of the Invention

[0005] The purpose of this invention is to provide a wastewater desulfurization device that solves the problems of poor mass transfer effect and difficulty in dealing with scenarios with large fluctuations in influent water quality in existing desulfurization devices.

[0006] Another objective of this invention is to provide a method for using a wastewater desulfurization device to ensure the stability of the effluent quality and reduce fluctuations in the entire wastewater treatment system.

[0007] The embodiments of the present invention are achieved through the following technical solutions:

[0008] A wastewater desulfurization device includes: a shell, an upper mounting plate, an upper annular packing, a lower mounting plate, a lower annular packing, a first pipe body, and a second pipe body. The shell includes a first mass transfer zone and a heating zone from top to bottom. The upper mounting plate is rotatably connected to the shell, and a gap is left between the edge of the upper mounting plate and the inner wall of the shell. A plurality of upper annular packings are concentrically distributed at the bottom end of the upper mounting plate. The lower mounting plate is connected to the inner wall of the shell. A first mass transfer zone is formed between the lower mounting plate and the upper mounting plate. A wastewater inlet is provided on the side of the first mass transfer zone. A liquid outlet is provided at the end of the plate away from the inner wall of the shell; several lower annular packings are concentrically distributed at the top of the lower mounting plate; the bottom end of the upper annular packing extends into the gap between adjacent lower annular packings; one end of the first tube is connected to the upper mounting plate; the other end of the first tube passes through the lower mounting plate and is rotatably connected to the lower mounting plate; the first tube is provided with a side hole, which communicates with the first mass transfer zone; the second tube is rotatably connected to the bottom end of the first tube; the second tube is used to introduce steam from the heating zone into the first tube.

[0009] Preferably, the wastewater desulfurization device includes: an air supply pipe connected to the second pipe body, the air supply pipe being used to introduce high-pressure gas; the second pipe body is provided with a one-way valve, the height of the one-way valve being lower than that of the air supply pipe.

[0010] Preferably, the wastewater desulfurization device includes: an orifice plate, and the end of the second pipe body away from the first pipe body is connected to the orifice plate.

[0011] Preferably, a second mass transfer zone is formed between the orifice plate and the lower mounting plate; the second mass transfer zone is provided with a transverse liquid distributor.

[0012] Preferably, the wastewater desulfurization device further includes: a buffer tank located below the liquid outlet, the buffer tank having a liquid outlet pipe with the liquid outlet end passing through the housing; a transverse liquid distributor in the shape of an annular ring, the inner ring wall of the transverse liquid distributor being connected to the outer wall of the buffer tank; and the height of the liquid inlet end of the transverse liquid distributor being lower than the top wall of the buffer tank.

[0013] Preferably, the lower mounting plate includes: a first horizontal portion and an inclined portion, the first horizontal portion being rotatably connected to the first tube body; the lower end of the inclined portion being connected to the end of the first horizontal portion away from the first tube body.

[0014] Preferably, the wastewater inlet is provided with a vertical liquid distributor, the liquid outlet of the vertical liquid distributor is horizontal and faces the first mass transfer zone; the lower mounting plate further includes: a second horizontal part, the second horizontal part being connected to the high end of the inclined part.

[0015] Preferably, the orifice plate includes a thick plate portion and a thin plate portion, with the bottom end of the second tube passing through the thick plate portion; the thin plate portion is annular, and its inner annular wall is connected to the side wall of the thick plate portion; the distribution range of the transverse liquid distributor is at a certain distance from the thick plate portion in the horizontal direction; the wastewater desulfurization device further includes an isolation cylinder, the top wall of which is connected to the bottom wall of the thick plate portion; the height of the outlet of the heating zone is lower than the height of the bottom wall of the isolation cylinder.

[0016] A method of using the aforementioned wastewater desulfurization device, wherein the method for regulating the effluent flow rate of the buffer tank includes:

[0017] Historical data was used to obtain historical relationship curves between wastewater inlet parameters, buffer tank effluent flow rate, and effluent sulfur content; the wastewater inlet parameters include: wastewater sulfur content;

[0018] The actual outflow rate of the buffer tank is adjusted according to the preset sulfur content threshold and wastewater inlet parameters.

[0019] Preferably, when the actual outflow rate of the buffer tank is less than the preset minimum flow rate, the rotation speed of the upper mounting plate is adjusted.

[0020] The method for controlling the rotation speed of the upper mounting plate includes:

[0021] When the effluent flow rate is equal to the preset minimum flow rate, the historical relationship curve between the wastewater inlet parameters, rotation speed and sulfur content of the effluent is obtained through historical data.

[0022] The rotation speed is adjusted according to the preset sulfur content threshold of the effluent and the wastewater inlet parameters.

[0023] The present invention has at least the following beneficial effects:

[0024] In this invention, the process of wastewater flowing from the wastewater inlet to the liquid outlet involves multiple paths. These include the gap between the upper and lower annular packing layers, entering the liquid outlet along the lower annular packing zone, and then, under the centrifugal force of the rotating upper mounting plate, separating from the upper annular packing zone and entering the lower annular packing zone before finally reaching the liquid outlet. Therefore, during the rotation of the upper mounting plate, not only is the wastewater continuously sheared by the upper annular packing layer, enhancing the mass transfer between gas and liquid, but the mass transfer path between wastewater and gas is also increased, thereby improving the desulfurization effect. The rotation of the first pipe body driven by the upper mounting plate also increases the helicity of the gas, further enhancing the mass transfer effect. When the wastewater quality fluctuates significantly, the stability of the effluent quality can be ensured by controlling the rotation of the upper mounting plate, thereby reducing fluctuations in the entire wastewater treatment system. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a wastewater desulfurization unit;

[0027] Figure 2 for Figure 1 Detailed view of point A in the middle;

[0028] Icons: 1-Shell, 101-First mass transfer zone, 102-Heating zone, 103-Second mass transfer zone, 104-Sewage inlet, 2-Upper mounting plate, 3-Upper annular packing, 4-Lower mounting plate, 401-First horizontal section, 4011-Liquid outlet, 402-Inclined section, 403-Second horizontal section, 5-Lower annular packing, 6-First pipe body, 601-Side hole, 7-Second pipe body, 71-One-way valve, 8-Air supply pipe, 9-Orifice plate, 901-Thick plate section, 902-Thin plate section, 10-Horizontal liquid distributor, 11-Buffer tank, 1101-Liquid outlet pipe, 12-Vertical liquid distributor, 13-Isolation cylinder. Detailed Implementation

[0029] To make the objectives, methods, and advantages of the embodiments of the present invention clearer, the methods in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0030] Example 1: As Figure 1-2As shown, a wastewater desulfurization device includes: a shell 1, an upper mounting plate 2, an upper annular packing 3, a lower mounting plate 4, a lower annular packing 5, a first pipe body 6, and a second pipe body 7. The shell 1 includes a first mass transfer zone 101 and a heating zone 102 from top to bottom. The upper mounting plate 2 is rotatably connected to the shell 1, and a gap is left between the edge of the upper mounting plate 2 and the inner wall of the shell 1. A plurality of upper annular packing 3 are concentrically distributed at the bottom end of the upper mounting plate 2. The lower mounting plate 4 is connected to the inner wall of the shell 1. The first mass transfer zone 101 is formed between the lower mounting plate 4 and the upper mounting plate 2. A wastewater inlet 104 is provided on the side of the first mass transfer zone 101. The mounting plate 4 has a liquid outlet 4011 at one end away from the inner wall of the housing 1; a plurality of lower annular packings 5 ​​are concentrically distributed at the top of the lower mounting plate 4; the bottom end of the upper annular packing 3 extends into the gap between adjacent lower annular packings 5; one end of the first tube 6 is connected to the upper mounting plate 2; the other end of the first tube 6 passes through the lower mounting plate 4 and is rotatably connected to the lower mounting plate 4; the first tube 6 has a side hole 601, which communicates with the first mass transfer zone 101; the second tube 7 is rotatably connected to the bottom end of the first tube 6; the second tube 7 is used to introduce steam from the heating zone 102 into the first tube 6.

[0031] In specific implementation, suspended solids and crude oil can be separated through pretreatment before the wastewater enters the desulfurization unit. In this embodiment, concentric distribution refers to the fact that the centers of the corresponding annular packing rings are the same. The upper annular packing 3 and lower annular packing 5 can be directly made of integral structured packing, or they can be formed by loading bulk packing into annular containers with water flow channels, such as annular mesh cages. The diameters of the upper annular packing 3 and / or lower annular packing 5 are different; the shorter the diameter of the annular packing ring, the closer it is to the first pipe body 6. The spacing between adjacent upper annular packing rings 3 can be equal. The spacing between adjacent lower annular packing rings 5 ​​can also be equal. A gas outlet can be provided above the shell 1 to allow gas to enter the next process. The heating zone 102 can be electrically heated, for example, by installing electric heating tubes or heating plates in the heating zone 102.

[0032] During use, the pretreated wastewater enters the first mass transfer zone 101 through the wastewater inlet 104. The wastewater flows from the outside to the inside of the first mass transfer zone 101, while the gas carrier passes through the second pipe 7 and the first pipe 6 in sequence, and then enters the first mass transfer zone 101 through the side hole 601 of the first pipe 6. At this time, the gas and wastewater flow relative to each other. Under the influence of the high temperature gas, hydrogen sulfide desorbs and transfers from the liquid phase to the gas phase, and is finally carried away with the high temperature gas. During the flow of sewage through the first mass transfer zone 101, the sewage can be considered as three parts. The first part of the sewage passes laterally through the lower annular packing 5 and finally falls into the heating zone 102 from the liquid outlet 4011. The second part of the sewage passes laterally through the upper annular packing 3. However, since the upper annular packing 3 is in a rotating state, the sewage will have a component velocity away from the first pipe body 6 under the action of centrifugal force. As a result, the path of some sewage to the sewage outlet will be longer. For example, some sewage is thrown out from the outside of the upper annular packing 3 and falls under the action of gravity. Then it passes laterally through the lower annular packing 5 and finally falls into the heating zone 102 from the liquid outlet 4011. The third part of the sewage is located in the gap between the first annular packing and the second annular packing. Under the high-speed shearing of the upper annular packing 3 and the high-pressure airflow, it presents a water mist state. The rotation speed of the upper mounting plate 2 can be easily obtained through experimentation, and will not be described in detail in this embodiment.

[0033] The hydrogen sulfide content in the wastewater passing through the first mass transfer zone 101 has been significantly reduced. Upon entering the heating zone 102, further heating generates water vapor and hydrogen sulfide gas, achieving a secondary removal of hydrogen sulfide. At this point, the hydrogen sulfide content is significantly reduced and the wastewater is at a high temperature; therefore, the secondary removal of hydrogen sulfide has little impact on the desulfurization effect when the wastewater first passes through the first mass transfer zone 101. The gas generated by heating passes through the first mass transfer zone 101 from the first pipe 6 and exits from the gas outlet above the shell 1, proceeding to the next process.

[0034] In this embodiment, the diversified wastewater path in the first mass transfer zone 101, combined with the shear force of the annular packing 3, improves the desulfurization effect of the wastewater. In this embodiment, the wastewater passing through the first mass transfer zone 101 is not directly discharged, but enters the heating zone 102. Utilizing partially purified wastewater as an airflow carrier can reduce the amount of additional water used and also achieve secondary desulfurization of the wastewater.

[0035] When the wastewater passes through the first mass transfer zone 101, it will exchange heat with the high-temperature gas. Therefore, after passing through the first mass transfer zone 101, the wastewater enters the heating zone 102, which can also reduce the energy consumption of the heating zone 102.

[0036] As an example, the first tube 6 rotates in the opposite direction to the upper mounting plate 2 to provide gas-liquid mass transfer.

[0037] Example 2: To further improve the vapor-liquid mass transfer, improvements were made based on Example 1, such as... Figure 1 As shown, in this embodiment, the wastewater desulfurization device includes: an air supply pipe 8, which is connected to the second pipe body 7, and is used to introduce high-pressure gas; the second pipe body 7 is provided with a one-way valve 71, the height of which is lower than that of the air supply pipe 8.

[0038] In practice, the gas supply pipe 8 is used to introduce externally added high-temperature steam or nitrogen, and can also increase the pressure of the externally added gas, thereby improving the gas-liquid mass transfer effect, with nitrogen being preferred. To prevent the externally added gas from entering the heating zone 102, this embodiment also provides a one-way valve 71 at the second pipe body 7, preventing gas from entering the heating zone 102 from the second pipe body 7. A one-way valve 71 can also be provided at the liquid outlet 4011.

[0039] Example 3: To further enhance the desulfurization effect of wastewater, improvements were made based on Example 1, such as... Figure 1 As shown, in this embodiment, the wastewater desulfurization device includes: an orifice plate 9, and the end of the second pipe body 7 away from the first pipe body 6 is connected to the orifice plate 9; a second mass transfer zone 103 is formed between the orifice plate 9 and the lower mounting plate 4; the second mass transfer zone 103 is provided with a transverse liquid distributor 10.

[0040] In the specific implementation process, the transverse liquid distributor 10 is existing technology, and its purpose is at least to achieve uniform liquid distribution. To increase the mass transfer effect, columnar packing can be added between the transverse liquid distributor 10 and the orifice plate 9. The orifice plate 9 can divide the gas in the heating zone 102 into two parts. One part passes through the second pipe 7 and enters the first mass transfer zone 101, while the other part passes from bottom to top through the through holes on the orifice plate 9 and enters the second mass transfer zone 103. At this time, the sewage passing through the first mass transfer zone 101 passes from top to bottom through the second mass transfer zone 103, undergoes secondary mass transfer with the gas, and then falls into the heating zone 102. Another gas outlet can be provided between the lower mounting plate 4 and the transverse liquid distributor 10.

[0041] Example 4: An improvement was made based on Example 3, such as... Figure 1 As shown, in this embodiment, the wastewater desulfurization device further includes: a buffer tank 11, which is located below the liquid outlet 4011. The buffer tank 11 is provided with a liquid outlet pipe 1101, the liquid outlet end of which passes through the housing 1; the transverse liquid distributor 10 is annular, and the inner ring wall of the transverse liquid distributor 10 is connected to the outer wall of the buffer tank 11; the height of the liquid inlet end of the transverse liquid distributor 10 is lower than the top wall of the buffer tank 11.

[0042] In practice, the buffer tank 11 can be annular, with the second pipe 7 passing through the inner ring. After adding the buffer tank 11, the wastewater passing through the first mass transfer zone 101 no longer directly enters the heating zone 102, but instead first enters the buffer tank 11. When the buffer tank 11 is full, the liquid flow rate of the outlet pipe 1101 on the buffer tank 11 is controlled to determine whether the liquid in the buffer tank 11 overflows from the buffer tank 11 and enters the horizontal distributor 10. A stirring device can also be installed inside the buffer tank 11 to homogenize the water quality.

[0043] As an example, when the sulfur content of the wastewater meets expectations after it passes through the first mass transfer zone 101, the purified wastewater can be discharged from the buffer tank 11 in whole or in part.

[0044] As an example, when the sulfur content of the wastewater is still higher than the preset value after passing through the first mass transfer zone 101, the proportion of liquid discharged from the outlet pipe 1101 and the proportion of liquid overflowing from the top of the buffer tank 11 is controlled so that the liquid overflows in a certain proportion. The overflowed liquid passes through the second mass transfer zone 103 and enters the heating zone 102.

[0045] As an example, a liquid outlet 4011 can be provided in the heating zone 102 to maintain the liquid level in the heating zone 102. The water from the heating zone 102 and the buffer tank 11 can be combined before entering the next process. The quality of the combined water can be judged by whether it meets the expected sulfur content.

[0046] In this embodiment, after the desulfurization device is equipped with a buffer tank 11, the outflow rate of the buffer tank 11 can be controlled to adapt to the water quality fluctuations of the wastewater, ensuring the stability of the effluent water quality and reducing the impact of water quality fluctuations on the overall water treatment system.

[0047] Since the gas in the second mass transfer zone 103 mainly relies on the steam generated by the heating zone 102, the mass transfer effect will be relatively reduced. Meanwhile, the first mass transfer zone 101 has a larger processing capacity. Therefore, the purpose of setting up the buffer tank 11 is to reduce the processing capacity of the second mass transfer zone 103 so as to fully utilize the processing capacity of the second mass transfer zone 103.

[0048] Example 5: To guide the flow of sewage, improvements were made based on Example 4, such as... Figure 1 As shown, in this embodiment, the lower mounting plate 4 includes a first horizontal portion 401 and an inclined portion 402. The first horizontal portion 401 is rotatably connected to the first pipe body 6. The lower end of the inclined portion 402 is connected to the end of the first horizontal portion 401 away from the first pipe body 6. The sewage inlet 104 is provided with a vertical distributor 12, the outlet direction of which is horizontal and towards the first mass transfer zone 101. The lower mounting plate 4 also includes a second horizontal portion 403, which is connected to the upper end of the inclined portion 402.

[0049] In the specific implementation process, the sewage flows downward along the inclined section 402 from the upper end of the inclined section 402, and then flows out of the first mass transfer zone 101 through the liquid outlet 4011 on the first horizontal section 401. If the second horizontal section 403 is not provided, the liquid distribution range of the vertical liquid distributor 12 is difficult to completely cover the upper annular packing 3 and the lower annular packing 5. Multiple vertical liquid distributors 12 can be provided, and multiple vertical liquid distributors 12 are arranged in a ring around the first mass transfer zone 101. After the vertical liquid distributor 12 sprays the sewage into the first mass transfer zone 101, the sewage comes into contact with the gas in the first mass transfer zone 101. The gas carries away the hydrogen sulfide in the sewage and exits from the outlet at the top of the shell 1. The desulfurized sewage enters the buffer tank 11 from the liquid outlet 4011.

[0050] Example 6: To reduce energy loss in the heating zone 102, improvements were made based on Examples 4-5, such as... Figure 1-2 As shown, in this embodiment, the orifice plate 9 includes a thick plate portion 901 and a thin plate portion 902, with the bottom end of the second tube 7 passing through the thick plate portion 901; the thin plate portion 902 is annular, and the inner annular wall of the thin plate portion 902 is connected to the side wall of the thick plate portion 901; the distribution range of the transverse liquid distributor 10 is at a certain distance from the thick plate portion 901 in the horizontal direction; the wastewater desulfurization device also includes an isolation cylinder 13, the top wall of the isolation cylinder 13 is connected to the bottom wall of the thick plate portion 901; the height of the outlet of the heating zone 102 is lower than the height of the bottom wall of the isolation cylinder 13.

[0051] In specific implementation, both the thin plate portion 902 and the thick plate portion 901 can be provided with through holes. Water outlet from the heating zone 102 will cause some heat loss; therefore, an isolation cylinder 13 is provided in this embodiment. The heating component of the heating zone 102 can be located inside the heating cylinder, see [reference needed]. Figure 1 The black shaded area in the middle. The liquid passing through the second mass transfer zone 103 enters the annular gap between the isolation cylinder 13 and the shell 1 via the thin plate section 902. At this time, the temperature of the liquid in the annular gap is lower than the temperature of the liquid in the isolation cylinder 13. As the lower-temperature liquid flows into the isolation cylinder 13 from the annular gap, it will continuously raise the temperature of the higher-temperature liquid in the isolation cylinder 13. The outlet of the heating zone 102 is located at the bottom and can also be located in the aforementioned annular gap, so that the outlet water temperature is lower and the heat energy carried away by the water outlet of the heating zone 102 is reduced.

[0052] One of the purposes of setting up the thick plate section 901 is to prevent the liquid from the second mass transfer zone 103 from entering the heating zone 102 from the top of the isolation cylinder 13.

[0053] Example 7: This example provides a method for using the aforementioned wastewater desulfurization device, wherein the method for regulating the effluent flow rate of the buffer tank includes:

[0054] Historical data was used to obtain historical relationship curves between wastewater inlet parameters, buffer tank effluent flow rate, and effluent sulfur content; the wastewater inlet parameters include: wastewater sulfur content;

[0055] The actual outflow rate of the buffer tank is adjusted according to the preset sulfur content threshold and wastewater inlet parameters.

[0056] In practice, due to significant fluctuations in influent water quality, sulfur content detection devices or samples can be installed at the inlet and / or outlet. Under the same operating parameters, if the sulfur content of the influent to the wastewater desulfurization unit increases substantially, the sulfur content of the effluent is likely to exceed the standard. If the wastewater desulfurization unit always operates at the operating parameters corresponding to maximum desulfurization efficiency, the corresponding energy consumption will increase significantly. Therefore, the applicant has conceived of a desulfurization device with adjustable desulfurization efficiency and a corresponding usage method. The sulfur content of the effluent refers to the sulfur content of the mixed water formed after the effluent from the buffer tank and the heating zone merges.

[0057] To maintain the stability of the treatment capacity, the wastewater inlet parameters in this embodiment do not include the influent flow rate. The sulfur content of the wastewater, the effluent flow rate of the buffer tank, and the sulfur content of the effluent can be obtained through experiments, and a three-dimensional curve is constructed using these three data points.

[0058] The effluent sulfur content threshold refers to the maximum permissible sulfur content in the effluent. When the sulfur content of the wastewater changes, the optimal effluent flow rate of the buffer tank can be obtained based on the three-dimensional curve, and the effluent flow rate can be adjusted by regulating the flow valve of the effluent pipe.

[0059] By adjusting the outflow rate of the buffer tank, the ratio between the liquid overflowing from the buffer tank into the second mass transfer zone and the liquid directly discharged can be controlled. With the water level in the heating zone remaining constant, the amount of water discharged from the heating zone changes, thereby controlling the sulfur content of the outflowing liquid.

[0060] Example 8: In this example, when the actual outflow rate of the buffer tank is less than the preset minimum flow rate, the rotation speed of the upper mounting plate is adjusted.

[0061] The method for controlling the rotation speed of the upper mounting plate includes:

[0062] When the effluent flow rate is equal to the preset minimum flow rate, the historical relationship curve between the wastewater inlet parameters, rotation speed and sulfur content of the effluent is obtained through historical data.

[0063] The rotation speed is adjusted according to the preset sulfur content threshold of the effluent and the wastewater inlet parameters.

[0064] In practice, the minimum flow rate of the buffer tank outlet can be set according to the processing capacity of the second mass transfer zone. The higher the processing capacity of the second mass transfer zone, the lower the minimum flow rate of the buffer tank outlet. To ensure effective desulfurization in the second mass transfer zone, the outlet flow rate of the buffer tank cannot be reduced indefinitely. Therefore, when the outlet flow rate of the buffer tank drops to the minimum flow rate, this embodiment regulates the sulfur content of the outlet liquid by adjusting the rotation speed of the upper mounting plate.

[0065] The rotation speed of the upper mounting plate affects the shear force exerted by the upper annular packing on the wastewater, as well as the centrifugal force on the wastewater, thus influencing the wastewater's movement path. Increased rotation speed increases the shear force, enhancing the mass transfer effect between water mist and gas. The increased movement path also extends the mass transfer time, thereby improving the desulfurization effect in the first mass transfer zone.

[0066] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A wastewater desulfurization device, characterized in that, include: The housing (1) includes, from top to bottom, a first mass transfer zone (101) and a heating zone (102); Upper mounting plate (2), which is rotatably connected to the housing (1), and a gap is left between the edge of the upper mounting plate (2) and the inner wall of the housing (1); Upper annular packing (3), a plurality of the upper annular packing (3) are concentrically distributed at the bottom end of the upper mounting plate (2); A lower mounting plate (4) is connected to the inner wall of the housing (1); a first mass transfer zone (101) is formed between the lower mounting plate (4) and the upper mounting plate (2); a sewage inlet (104) is provided on the side of the first mass transfer zone (101); a liquid outlet (4011) is provided at the end of the lower mounting plate (4) away from the inner wall of the housing (1); The lower annular packing (5) consists of several lower annular packings (5) concentrically distributed at the top of the lower mounting plate (4); the bottom end of the upper annular packing (3) extends into the gap between adjacent lower annular packings (5); The first tube (6) has one end connected to the upper mounting plate (2); the other end of the first tube (6) passes through the lower mounting plate (4) and is rotatably connected to the lower mounting plate (4); the first tube (6) has a side hole (601) and the side hole (601) communicates with the first mass transfer zone (101). The second tube (7) is rotatably connected to the bottom end of the first tube (6); the second tube (7) is used to introduce steam from the heating zone (102) into the first tube (6).

2. The wastewater desulfurization device according to claim 1, characterized in that, include: Gas supply pipe (8), which is connected to the second pipe body (7), is used to introduce high-pressure gas; The second pipe body (7) is provided with a one-way valve (71), the height of which is lower than that of the air supply pipe (8).

3. The wastewater desulfurization device according to claim 1, characterized in that, include: The orifice plate (9) is connected to the end of the second tube (7) away from the first tube (6).

4. The wastewater desulfurization device according to claim 3, characterized in that, A second mass transfer zone (103) is formed between the orifice plate (9) and the lower mounting plate (4); The second mass transfer zone (103) is equipped with a transverse liquid distributor (10).

5. The wastewater desulfurization device according to claim 4, characterized in that, Also includes: A buffer tank (11) is located below the liquid outlet (4011). The buffer tank (11) is provided with a liquid outlet pipe (1101), and the liquid outlet end of the liquid outlet pipe (1101) passes through the housing (1). The transverse liquid distributor (10) is annular, and the inner ring wall of the transverse liquid distributor (10) is connected to the outer wall of the buffer tank (11); the height of the liquid inlet end of the transverse liquid distributor (10) is lower than the top wall of the buffer tank (11).

6. The wastewater desulfurization device according to claim 5, characterized in that, The lower mounting plate (4) includes: The first horizontal part (401) is rotatably connected to the first tube body (6); An inclined portion (402) is provided, the lower end of which is connected to the end of the first horizontal portion (401) away from the first tube body (6).

7. The wastewater desulfurization device according to claim 6, characterized in that, The wastewater inlet (104) is equipped with a vertical liquid distributor (12), and the liquid outlet direction of the vertical liquid distributor (12) is horizontal and faces the first mass transfer zone (101). The lower mounting plate (4) also includes: The second horizontal section (403) is connected to the high end of the inclined section (402).

8. The wastewater desulfurization device according to any one of claims 5-7, characterized in that, The orifice plate (9) includes: Thick plate section (901), the bottom end of the second tube body (7) passes through the thick plate section (901); The thin plate portion (902) is annular, and the inner ring wall of the thin plate portion (902) is connected to the side wall of the thick plate portion (901); the liquid distribution range of the transverse liquid distributor (10) is at a certain distance from the thick plate portion (901) in the horizontal direction; The wastewater desulfurization unit also includes: The top wall of the isolation cylinder (13) is connected to the bottom wall of the thick plate portion (901); the height of the water outlet of the heating zone (102) is lower than the height of the bottom wall of the isolation cylinder (13).

9. A method of using the wastewater desulfurization device according to any one of claims 5-8, characterized in that, The method for regulating the outflow rate of the buffer tank includes: Historical data was used to obtain historical relationship curves between wastewater inlet parameters, buffer tank effluent flow rate, and effluent sulfur content; the wastewater inlet parameters include: wastewater sulfur content; The actual outflow rate of the buffer tank is adjusted according to the preset sulfur content threshold and wastewater inlet parameters.

10. The method of use according to claim 9, characterized in that, When the actual outflow rate of the buffer tank is less than the preset minimum flow rate, the rotation speed of the upper mounting plate is adjusted. The method for controlling the rotation speed of the upper mounting plate includes: When the effluent flow rate is equal to the preset minimum flow rate, the historical relationship curve between the wastewater inlet parameters, rotation speed and sulfur content of the effluent is obtained through historical data. The rotation speed is adjusted according to the preset sulfur content threshold of the effluent and the wastewater inlet parameters.

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