A sewage desulfurization device and a method of using the same

Abstract

The present application relates to sewage desulfurization device field, in order to solve the mass transfer effect of the existing desulfurization device is not good and difficult to deal with the problem of water quality fluctuation of large scene, provide a kind of sewage desulfurization device and its use method, including: shell, upper mounting plate, upper annular packing, lower mounting plate, lower annular packing, first pipe body and second pipe body, upper mounting plate is rotatably connected with shell, the edge of upper mounting plate and the inner wall of shell are left with gap;Lower mounting plate is connected with shell inner wall;The one end of first pipe body is connected with upper mounting plate;The other end of first pipe body is worn in lower mounting plate and rotatably connected with lower mounting plate, the side hole of first pipe body is communicated with first mass transfer zone;Second pipe body is rotatably connected with the bottom end of first pipe body.The present application not only can cut sewage by upper annular packing constantly, enhance the mass transfer effect of gas and liquid, can also increase the mass transfer path of sewage and gas, and then increase sulfur removal effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sewage desulfurization device, in particular to a sewage desulfurization device and a use method thereof. BACKGROUND

[0002] In the production process of chemical industry, petrochemical industry, pharmaceutical industry and other industries, it is inevitable to produce sewage containing sulfur. The sulfur compounds in the sewage have toxicity and corrosion, and also have a certain odor, which has a huge impact on the surrounding environment, and more seriously, it also corrodes the sewage structure, leading to sewage entering the drinking water source. Therefore, the generated sewage containing sulfur must be purified and treated. The content of sulfur compounds in the sewage containing sulfur generated in different fields is different, so the methods used for treatment are also different.

[0003] Sulfur elements and their compounds such as hydrogen sulfide, sulfate, organic sulfide, etc. naturally exist in oil and gas reservoir formations. In the production process, these sulfur-containing substances are carried to the ground with crude oil, natural gas and formation water, and directly enter the sewage system. In addition, water injection development method is widely used in oilfields, and the sulfate in the injected water or formation water is reduced to sulfur ions and hydrogen sulfide under anaerobic environment. Therefore, the sewage in oil and gas fields contains a large amount of sulfur, which needs to be desulfurized.

[0004] The principle of the existing desulfurization device is various, such as chemical sedimentation, alkali absorption, biological desulfurization and stripping desulfurization. Among them, the principle of stripping desulfurization is based on gas-liquid equilibrium and mass transfer theory, and by introducing stripping medium such as water vapor into the device, the difference in partial pressure of components in gas-liquid two phases is used to promote the transfer of volatile substances from liquid phase to gas phase to realize separation. The mass transfer effect of the existing desulfurization device is not good and it is difficult to deal with the scene of large fluctuation of water quality. SUMMARY

[0005] The purpose of the present application is to provide a sewage desulfurization device, which solves the problem of poor mass transfer effect of the existing desulfurization device and difficulty in dealing with the scene of large fluctuation of water quality.

[0006] Another purpose of the present application is to provide a use method of the sewage desulfurization device, which ensures the stability of the effluent water quality and reduces the fluctuation of the whole sewage treatment system.

[0007] The embodiments of the present application are realized by the following technical solutions:

[0008] The sewage desulfurization device comprises a shell, an upper mounting plate, upper annular packing, a lower mounting plate, lower annular packing, a first pipe body and a second pipe body, the shell comprises a first mass transfer zone and a heating zone from top to bottom; the upper mounting plate is rotationally connected with 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 with the inner wall of the shell; the first mass transfer zone is formed between the lower mounting plate and the upper mounting plate; a sewage inlet is arranged on the side of the first mass transfer zone; a liquid outlet is arranged at the end of the lower mounting plate away from the inner wall of the shell; a plurality of lower annular packings are concentrically distributed at the top end 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 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 rotationally connected with the lower mounting plate, the first pipe body is provided with a side hole, and the side hole is in communication with the first mass transfer zone; the second pipe body is rotationally connected with the bottom end of the first pipe body; the second pipe body is used for guiding steam in the heating zone into the first pipe body.

[0009] Preferably, the sewage desulfurization device comprises a gas supplement pipe, the gas supplement pipe is in communication with the second pipe body, and the gas supplement pipe is used for guiding high-pressure gas; the second pipe body is provided with a one-way valve, and the height of the one-way valve is lower than that of the gas supplement pipe.

[0010] Preferably, the sewage desulfurization device comprises a hole plate, and the end of the second pipe body away from the first pipe body is connected with the hole plate.

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

[0012] Preferably, the sewage desulfurization device further comprises a buffer tank, the buffer tank is located below the liquid outlet, the buffer tank is provided with a liquid outlet pipe, the liquid outlet end of the liquid outlet pipe penetrates through the shell, the horizontal liquid distributor is annular, the inner annular wall of the horizontal liquid distributor is connected with the outer side wall of the buffer tank, and the height of the liquid inlet end of the horizontal liquid distributor is lower than that of the top wall of the buffer tank.

[0013] Preferably, the lower mounting plate comprises a first horizontal part and an inclined part, the first horizontal part is rotationally connected with the first pipe body, and the low end of the inclined part is connected with the end of the first horizontal part away from the first pipe body.

[0014] Preferably, the sewage inlet is provided with a vertical liquid distributor, the liquid outlet direction of the vertical liquid distributor is horizontal and towards the first mass transfer zone, and the lower mounting plate further comprises a second horizontal part, and the second horizontal part is connected with the high end of the inclined part.

[0015] Preferably, the hole plate comprises: a thick plate part and a thin plate part, the bottom end of the second pipe body is arranged in the thick plate part; the thin plate part is annular, the inner annular wall of the thin plate part is connected with the side wall of the thick plate part; the liquid distribution range of the transverse liquid distributor is horizontally away from the thick plate part; the sewage desulfurization device further comprises: an isolation cylinder, the top wall of the isolation cylinder is connected with the bottom wall of the thick plate part; the height of the water outlet of the heating area is lower than the height of the bottom wall of the isolation cylinder.

[0016] A method for using the sewage desulfurization device, the liquid flow control method of the buffer tank comprises:

[0017] Obtain the historical relationship curve between the sewage inlet parameters, the liquid flow of the buffer tank and the sulfur content of the liquid flow through historical data; the sewage inlet parameters comprise: the sulfur content of the sewage;

[0018] Control the actual liquid flow of the buffer tank according to the preset liquid sulfur content threshold and the sewage inlet parameters.

[0019] Preferably, when the actual liquid flow of the buffer tank is less than the preset minimum flow, the rotation speed of the upper mounting plate is controlled;

[0020] The control method of the rotation speed of the upper mounting plate comprises:

[0021] When the liquid flow is equal to the preset minimum flow, obtain the historical relationship curve between the sewage inlet parameters, the rotation speed and the sulfur content of the liquid flow through historical data;

[0022] Control the rotation speed according to the preset liquid sulfur content threshold and the sewage inlet parameters.

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

[0024] In the present application, the process of sewage flowing from the sewage inlet to the liquid outlet has multiple paths, such as the gap between the upper annular filler and the lower annular filler, such as entering the liquid outlet along the lower annular filler area, and such as entering the lower annular filler area from the upper annular filler area under the centrifugal force of the rotation of the upper mounting plate, and then entering the liquid outlet. Therefore, during the rotation of the upper mounting plate, not only can the sewage be continuously sheared by the upper annular filler to enhance the mass transfer effect of the gas and the liquid, but also the mass transfer path of the sewage and the gas can be increased, thereby increasing the desulfurization effect; the rotation of the first pipe body driven by the upper mounting plate can also increase the spiral degree of the gas, thereby enhancing the mass transfer effect; when the sewage quality changes greatly, the rotation of the upper mounting plate can be controlled to ensure the stability of the water quality, thereby reducing the fluctuation of the entire sewage treatment system. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0026] Figure 1 Figure 1 is a structural schematic diagram of a sewage desulfurization device;

[0027] Figure 2 Figure 2 is a detail view of A in figure 1; Figure 1

[0028] Figure 1 is a structural schematic diagram of a sewage desulfurization device; DETAILED DESCRIPTION

[0029] In order to make the purpose, method scheme and advantages of the embodiments of the present application more clear, the method scheme in the embodiments of the present application is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0030] Embodiment 1: as Figures 1-2 ​The sewage desulfurization device shown comprises a shell 1, an upper mounting plate 2, upper annular packings 3, a lower mounting plate 4, lower annular packings 5, a first pipe body and a second pipe body 7. The shell 1 comprises a first mass transfer zone 101 and a heating zone 102 from top to bottom. The upper mounting plate 2 is rotationally connected with 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 packings 3 are concentrically distributed at the bottom end of the upper mounting plate 2. The lower mounting plate 4 is connected with 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 sewage inlet 104 is arranged beside the first mass transfer zone 101. A liquid outlet 4011 is arranged at the end of the lower mounting plate 4 away from the inner wall of the shell 1. A plurality of lower annular packings 5 are concentrically distributed at the top end 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 pipe body is connected with the upper mounting plate 2. The other end of the first pipe body penetrates the lower mounting plate 4 and is rotationally connected with the lower mounting plate 4. The first pipe body is provided with a side hole, and the side hole is in communication with the first mass transfer zone 101. The second pipe body 7 is rotationally connected with the bottom end of the first pipe body. The second pipe body 7 is used for guiding the steam in the heating zone 102 into the first pipe body.

[0031] In the implementation process, the suspended solids and crude oil can be separated by pretreatment before the sewage enters the desulfurization device. The concentric distribution in this embodiment refers to the same center of the corresponding annular packing. The upper annular packing 3 and the lower annular packing 5 can directly use the integral structured packing, or can be loaded with bulk packing by an annular net cage or other annular containers with water flow channels. The diameters of each upper annular packing 3 and / or lower annular packing 5 are different, and the shorter the diameter of the annular packing, the closer it is to the first pipe body. The spacing between adjacent upper annular packings 3 can be equal. The spacing between adjacent lower annular packings 5 can also be equal. A gas outlet can be arranged above the shell 1 so that the gas enters the next process. The heating zone 102 can use electric heating, such as arranging an electric heating pipe or a heating plate 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 in sequence, and then enters the first mass transfer zone 101 through the side hole of the first pipe. 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 wastewater through the first mass transfer zone 101, the wastewater can be considered as three parts. The first part of the wastewater 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 wastewater passes laterally through the upper annular packing 3. However, since the upper annular packing 3 is in a rotating state, the wastewater will have a component velocity away from the first pipe body under the action of centrifugal force. As a result, the path of some wastewater to the wastewater outlet will be longer. For example, some wastewater is thrown out from the outside of the upper annular packing 3 and falls under the action of gravity, then 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 wastewater is located in the gap between the first annular packing and the second annular packing, and under the cooperation of 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 tube body through the first mass transfer zone 101 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 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 the figure, in this embodiment, the sewage desulfurization device comprises: a gas supplement pipe 8, which is in communication with the second pipe body 7 and is used for introducing high-pressure gas; and a one-way valve 71 arranged on the second pipe body 7 and having a height lower than that of the gas supplement pipe 8.

[0038] In the implementation process, the gas supplement pipe 8 is used for introducing additional high-temperature water vapor or nitrogen gas, and the pressure of the additional gas can be increased, thereby improving the gas-liquid mass transfer effect, and the nitrogen gas is preferred. In order to avoid the additional gas from entering the heating area 102, the one-way valve 71 is arranged on the second pipe body 7 in this embodiment, so that the gas cannot enter the heating area 102 from the second pipe body 7. The one-way valve 71 can also be arranged at the liquid outlet 4011.

[0039] Example 3: In order to further increase the desulfurization effect of the sewage, the embodiment 1 is improved as follows: Figure 1 As shown in the figure, in this embodiment, the sewage desulfurization device comprises: a perforated plate 9, which is connected to the second pipe body 7 away from the first pipe body; a second mass transfer area 103 formed between the perforated plate 9 and the lower mounting plate 4; and a horizontal liquid distributor 10 arranged in the second mass transfer area 103.

[0040] In the implementation process, the horizontal liquid distributor 10 is a prior art, and the purpose is at least to achieve uniform distribution of the liquid. In order to increase the mass transfer effect, columnar fillers can also be arranged between the horizontal liquid distributor 10 and the perforated plate 9. The perforated plate 9 can divide the gas in the heating area 102 into two parts, one part enters the first mass transfer area 101 from the second pipe body 7, and the other part enters the second mass transfer area 103 through the through holes in the perforated plate 9 from bottom to top. At this time, the sewage passing through the first mass transfer area 101 falls into the heating area 102 from top to bottom after the secondary mass transfer with the gas. Another gas outlet can be arranged between the lower mounting plate 4 and the horizontal liquid distributor 10.

[0041] Example 4: The embodiment 3 is improved as follows: Figure 1 As shown in the figure, in this embodiment, the sewage desulfurization device further comprises: a buffer tank 11, which is located below the liquid outlet 4011 and is provided with an outlet pipe 1101, the outlet end of the outlet pipe 1101 penetrating through the shell 1; the horizontal liquid distributor 10 is annular, the inner ring wall of the horizontal liquid distributor 10 is connected to the outer side wall of the buffer tank 11; and the height of the liquid inlet end of the horizontal liquid distributor 10 is lower than that of the top wall of the buffer tank 11.

[0042] In the implementation, the buffer tank 11 can be annular, and the second pipe body 7 passes through the inner ring. After the buffer tank 11 is added, the sewage passing through the first mass transfer zone 101 no longer directly enters the heating zone 102, but first enters the buffer tank 11. When the buffer tank 11 is full, whether the liquid in the buffer tank 11 overflows from the buffer tank 11 and enters the horizontal liquid distributor 10 is controlled by controlling the liquid discharge flow rate of the liquid outlet pipe 1101 of the buffer tank 11. A stirring device can also be arranged in the buffer tank 11 to homogenize the water quality.

[0043] For example, when the sulfur content of the sewage passing through the first mass transfer zone 101 meets the expected value, the purified sewage can be discharged from the buffer tank 11 in whole or in part.

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

[0045] For example, a liquid outlet 4011 can be arranged in the heating zone 102 to maintain the liquid level of the liquid in the heating zone 102. The water outlet of the heating zone 102 and the buffer tank 11 can be combined to enter the next process. Whether the water quality of the combined water outlet meets the expected sulfur content.

[0046] In the embodiment, the desulfurization device is provided with the buffer tank 11, so that the liquid discharge flow rate of the buffer tank 11 can be controlled to adapt to the water quality fluctuation of the sewage, ensure the stability of the water quality of the water outlet, and reduce the influence of the water quality fluctuation 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 is relatively reduced, and the processing capacity of the first mass transfer zone 101 is relatively large. Therefore, the purpose of arranging the buffer tank 11 is also to reduce the processing capacity of the second mass transfer zone 103, so as to fully exert the processing capacity of the second mass transfer zone 103.

[0048] In order to guide the flow of the sewage, the embodiment 4 is improved as shown in Figure 1 In the embodiment, the lower mounting plate 4 includes a first horizontal part 401 and an inclined part 402. The first horizontal part 401 is rotationally connected with the first pipe body. The lower end of the inclined part 402 is connected with the end of the first horizontal part 401 away from the first pipe body. The sewage inlet 104 is provided with a vertical liquid distributor 12. The liquid outlet direction of the vertical liquid distributor 12 is horizontal and towards the first mass transfer zone 101. The lower mounting plate 4 further includes a second horizontal part 403 connected with the high end of the inclined part 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... Figures 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] acquire a historical relationship curve between the sewage import parameter, the outflow flow rate of the buffer tank and the outflow sulfur content through historical data; the sewage import parameter includes: sewage sulfur content;

[0055] According to the preset outflow sulfur content threshold and the sewage import parameter, the actual outflow flow rate of the buffer tank is regulated.

[0056] In the specific implementation process, because the water quality fluctuates greatly, a sulfur content detection device or a sampling detection device can be arranged at the water inlet and / or the water outlet. Under the same operating parameter, if the sewage sulfur content of the sewage desulfurization device increases greatly, the sulfur content of the effluent water quality is easy to exceed the standard. If the sewage desulfurization device always operates at the operating parameter corresponding to the maximum desulfurization efficiency, the corresponding energy consumption will increase significantly. Therefore, the applicant conceives a desulfurization device capable of regulating the desulfurization efficiency and conceives a corresponding use method. The outflow sulfur content refers to the sulfur content of the mixed water formed after the outflow of the buffer tank and the effluent of the heating zone are combined.

[0057] In order to maintain the stability of the treatment capacity, the sewage import parameter in the embodiment does not include the inflow rate. The sewage sulfur content, the outflow flow rate of the buffer tank and the outflow sulfur content can be acquired through experiments, and a three-dimensional curve is constructed by using the above three kinds of data.

[0058] The outflow sulfur content threshold refers to the maximum value of the allowed outflow sulfur content. When the sewage sulfur content changes, the optimal outflow flow rate of the buffer tank can be obtained according to the three-dimensional curve, and the outflow flow rate can be adjusted by adjusting the flow valve of the outflow pipe.

[0059] By adjusting the outflow flow rate of the buffer tank, the proportion between the liquid overflowing from the buffer tank to the second mass transfer zone and the liquid directly discharged can be regulated, the discharge amount of the water in the heating zone changes under the condition that the water level in the heating zone is unchanged, and then the outflow sulfur content is regulated.

[0060] In the embodiment, when the actual outflow flow rate of the buffer tank is less than the preset minimum flow rate, the rotation speed of the upper mounting plate is regulated.

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

[0062] When the outflow flow rate is equal to the preset minimum flow rate, a historical relationship curve between the sewage import parameter, the rotation speed and the outflow sulfur content is acquired through historical data;

[0063] According to the preset outflow sulfur content threshold and the sewage import parameter, the rotation speed is regulated.

[0064] In the implementation process, the minimum flow of the liquid out of the buffer tank 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 smaller the minimum flow of the liquid out of the buffer tank. In order to ensure the effective desulfurization of the second mass transfer zone, the liquid out of the buffer tank cannot be infinitely reduced. Therefore, when the flow of the liquid out of the buffer tank is reduced to the minimum flow, the embodiment adjusts the rotating speed of the upper mounting plate to regulate the sulfur content of the liquid out.

[0065] The rotating speed of the upper mounting plate will affect the shearing force of the upper annular packing on the sewage, and will also affect the centrifugal force on the sewage, thereby affecting the moving path of the sewage. When the rotating speed increases, the shearing force increases, the mass transfer effect of the water mist and the gas is increased, the moving path can increase the mass transfer time, and thereby the desulfurization effect of the first mass transfer zone is improved.

[0066] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

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 body has one end connected to the upper mounting plate (2); the other end of the first tube body passes through the lower mounting plate (4) and is rotatably connected to the lower mounting plate (4); the first tube body has a side hole, which is connected to the first mass transfer zone (101). The second tube (7) is rotatably connected to the bottom end of the first tube; the second tube (7) is used to introduce steam from the heating zone (102) into the first tube. The orifice plate (9) is connected to the orifice plate (9) at the end of the second tube (7) away from the first tube; 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); 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). 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).

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, The lower mounting plate (4) includes: The first horizontal part (401) is rotatably connected to the first tube body; 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.

4. The wastewater desulfurization device according to claim 3, 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).

5. A method of using the wastewater desulfurization device according to any one of claims 1-4, 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.

6. The method of use according to claim 5, 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 methods for adjusting the rotation speed of the upper mounting plate include: 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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