A desulfurization wastewater treatment device

Abstract

The utility model relates to a kind of desulfurization wastewater treatment devices, including flue gas cooling tank, flue gas cooling piece, smoke liquid mixing tank, smoke liquid mixing piece, flocculate separation piece and drain pipe, flue gas cooling tank flue gas inlet end is connected with flue gas pipeline, and cooling cavity is equipped in flue gas cooling tank;Flue gas cooling piece is connected in cooling cavity;Smoke liquid mixing tank inlet end is connected with the outlet end of flue gas cooling tank;Smoke liquid mixing piece is connected in smoke liquid mixing tank upper end;Flocculate separation piece includes the flocculate separation tank of the outlet end of smoke liquid mixing tank with the inlet end connection and the flocculate separation component connected on flocculate separation tank;Drain pipe is connected in another outlet of smoke liquid mixing tank. Through cooling design, flue gas temperature can be accurately controlled in the range suitable for subsequent processing, avoid the adverse effect caused by flue gas temperature being too high on subsequent smoke liquid mixing, flocculation separation and other processing links, ensure the stability and reliability of entire desulfurization wastewater treatment process, improve processing efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology in thermal power plants, and specifically relates to a desulfurization wastewater treatment device. Background Technology

[0002] In coal-fired power plants, flue gas desulfurization is a crucial step in controlling sulfur dioxide emissions and mitigating air pollution. Wet desulfurization technology is widely used due to its high efficiency and mature technology. However, wet desulfurization processes generate large amounts of desulfurization wastewater. This wastewater has a complex composition, containing high concentrations of suspended solids, heavy metal ions, acids and alkalis, and high salinity. If this wastewater is discharged directly without effective treatment, it will cause serious pollution to water bodies, soil, and other ecological environments, disrupting the ecological balance and endangering human health.

[0003] Existing technology CN215539610U provides a high-efficiency desulfurization device for power plants, which converts water into small-molecule water mist and sprays it onto the flue gas inside the purification chamber, allowing the flue gas to fully mix with the water mist, thus achieving a good dust reduction effect. However, the desulfurization process generates heavy metals and other polluting liquids, which will pollute the environment. If the wastewater is discharged directly without treatment, it will cause pollution. Furthermore, unsuitable flue gas temperature will affect the overall desulfurization wastewater treatment result. Utility Model Content

[0004] This utility model provides a desulfurization wastewater treatment device, which aims to solve the problems of poor dust treatment and poor desulfurization effect in existing solutions.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a desulfurization wastewater treatment device, comprising:

[0006] A flue gas cooling tank, wherein a flue gas inlet end is connected to a flue gas pipe, and a cooling chamber is provided inside the flue gas cooling tank;

[0007] A flue gas cooling component, which is connected inside the cooling cavity;

[0008] A flue gas mixing tank, the inlet end of which is connected to the outlet end of the flue gas cooling tank;

[0009] A vapor mixing component, which is connected to the upper end of the vapor mixing tank;

[0010] A flocculant separator includes a flocculant separator connected at its inlet end to the outlet end of the flue gas mixing tank, and a flocculant separator connected to the flocculant separator.

[0011] A drain pipe is connected to another outlet of the flue gas mixing tank.

[0012] Furthermore, it is crucial to ensure a proper connection between the flue gas duct carrying high-temperature flue gas and the flue gas inlet of the flue gas cooling tank. During connection, specialized fittings, such as sealing flanges, must be used to tightly align the flue gas duct end with the flue gas inlet of the cooling tank. Then, the flange is tightened with bolts, and high-temperature resistant sealant is applied to the flange connection to ensure a tight seal and prevent high-temperature flue gas leakage. Simultaneously, supports should be used to reinforce and secure the connection, ensuring its stability and allowing the high-temperature flue gas to enter the cooling tank smoothly and safely. After connection, an airtightness test is necessary. This can be performed by introducing gas at a certain pressure into the duct and using a leak detector to check for gas leaks at the connection. Only after passing the test can subsequent operations proceed, allowing the high-temperature flue gas to enter the cooling chamber of the cooling tank according to the predetermined path.

[0013] Preferably, the flue gas cooling tank is provided with a cooling water chamber and a water outlet chamber, and the flue gas cooling component includes:

[0014] A cooling cylinder, one end of which is connected to the cooling water chamber and the other end of which is connected to the water outlet chamber, with the middle part of the cooling cylinder located in the cooling chamber;

[0015] A cooling water tank has a cooling water outlet pipe connected to its outlet end, which is connected to the cooling water inlet end of the flue gas cooling tank, and the inlet end of the cooling water tank is connected to a cooling water inlet end.

[0016] A cooling water pump is connected to the cooling water outlet pipe.

[0017] Furthermore, the flue gas cooling system mainly consists of a cooling water tank, a cooling water pump, and a cooling water outlet pipe. Before starting the system, sufficient cooling water is injected into the cooling water tank; industrial circulating water can generally be used. The cooling water pump is then started, generating a pressure difference through mechanical operation to draw cooling water from the tank. Under pressure, the cooling water flows along the cooling water outlet pipe, entering the cooling water inlet of the flue gas cooling tank, and then flows into the cooling water chamber. In the cooling water chamber, the cooling water exchanges heat with the high-temperature flue gas through the cylinder wall. The cooling water, having absorbed heat from the high-temperature flue gas, increases in temperature and then flows into the outlet chamber.

[0018] In addition, one end of the cooling cylinder is connected to the cooling water chamber, and the other end is connected to the outlet water chamber, with the middle portion located within the cooling chamber. When the high-temperature flue gas enters the cooling chamber, the cooling cylinder is surrounded by low-temperature cooling water from the cooling water chamber. Due to the excellent thermal conductivity of the cylinder wall, the heat from the high-temperature flue gas is transferred to the cooling water through the cylinder wall. During this process, the temperature of the high-temperature flue gas gradually decreases, while the temperature of the cooling water gradually increases. Simultaneously, the heated cooling water flows into the outlet water chamber through the other end of the cooling cylinder, completing its heat exchange function and ensuring a continuous reduction in flue gas temperature.

[0019] Preferably, it also includes a cooling water recovery unit, which comprises:

[0020] A water recovery tank is connected to the water outlet chamber.

[0021] Furthermore, the heated cooling water is recovered through the water recovery tank connected to the water outlet chamber. After natural cooling or certain cooling treatment, it can be returned to the cooling water tank for reuse, thereby realizing the recycling of cooling water and achieving the purpose of energy saving and consumption reduction.

[0022] It is important to know that the effluent recovery tank and the cooling water tank are designed independently. When cooling water with a certain temperature is needed in the effluent recovery tank, it can be insulated separately to reuse its heat. This ensures that when cooling the flue gas, the accuracy of cooling can be guaranteed while making full use of the heat.

[0023] Preferably, the e-liquid mixing component includes:

[0024] A tobacco liquid mixing cylinder is connected to the upper end of the tobacco liquid mixing tank, and a preliminary mixing chamber is provided in the middle of the tobacco liquid mixing cylinder. A smoke chamber is also provided inside the tobacco liquid mixing cylinder. The smoke chamber is arranged in a ring outside the preliminary mixing chamber, and the preliminary mixing chamber is connected to the tobacco liquid mixing tank.

[0025] A flue gas connecting pipe, one end of which is connected to the cooling chamber, and the other end of which is connected to the flue gas chamber;

[0026] An atomizing nozzle is located within the preliminary mixing chamber and is configured to atomize the mixture to ensure thorough mixing of the atomized mixture with the flue gas.

[0027] Furthermore, the atomizing nozzle is installed inside the preliminary mixing chamber, located at the top or side, to uniformly atomize and spray the mixture throughout the entire chamber. The atomizing nozzle operates based on pressure atomization technology. When the mixture enters the nozzle through the outlet pipe, it is subjected to high pressure inside the nozzle and ejected at high speed through the nozzle orifice. At the moment of ejection, due to the rapid pressure change and air resistance, the mixture is broken into extremely fine droplets, typically with a particle size in the micrometer range. These atomized droplets have a large specific surface area, allowing them to quickly and fully contact the flue gas entering the preliminary mixing chamber. Harmful substances in the flue gas, such as sulfur dioxide, can react chemically with the chemical components in the mixture, thus being effectively absorbed and removed. Simultaneously, due to the complex and random trajectory of the droplets, they form a strong turbulent mixing with the flue gas within the preliminary mixing chamber, further improving reaction efficiency and mixing uniformity.

[0028] Preferably, the flue gas chamber includes:

[0029] The flue gas outer cavity is connected to the flue gas connecting pipe;

[0030] The flue gas inner cavity is located above the flue gas outer cavity;

[0031] A first connecting hole is provided, and all of the first connecting holes are disposed above the flue gas outer cavity, and the first connecting holes are connected to the flue gas inner cavity;

[0032] The second connecting hole is provided in a plurality of them, and all the plurality of the second connecting holes are located at the bottom of the flue gas inner cavity. The second connecting hole is connected to the preliminary mixing cavity.

[0033] The third connecting hole is provided in a plurality of them, and all of the third connecting holes are located at the top of the flue gas inner cavity, and the third connecting hole is located above the second connecting hole. The third connecting hole is connected to the preliminary mixing cavity.

[0034] Furthermore, the e-liquid mixing cylinder is securely installed on the upper end of the e-liquid mixing tank via welding or bolting. A preliminary mixing chamber is located in the middle of the mixing cylinder, allowing for initial mixing of the flue gas and the liquid mixture. This preliminary mixing chamber is cylindrical, with a certain volume to accommodate a specific amount of flue gas and liquid mixture, providing ample space for their mixing. Surrounding the preliminary mixing chamber is a ring-shaped flue gas chamber. This chamber consists of an outer flue gas chamber and an inner flue gas chamber located above it, connected by several first connecting holes. These first connecting holes are evenly distributed above the outer flue gas chamber, allowing the flue gas to smoothly enter the inner flue gas chamber. Simultaneously, several second connecting holes are located at the bottom of the inner flue gas chamber, and several third connecting holes are located at the top, above the second connecting holes; all of these are connected to the preliminary mixing chamber. This structural design ensures that as the flue gas flows within the flue gas chamber, it can fully contact the liquid mixture in the preliminary mixing chamber through the connecting holes at different locations, significantly improving the mixing effect and efficiency.

[0035] Preferably, it also includes a mixing supply component, which comprises:

[0036] A mixed liquid storage tank, with a mixed liquid outlet pipe connected to its outlet end, the mixed liquid outlet pipe also being located inside the preliminary mixing chamber, and the atomizing nozzle being connected to the mixed liquid outlet pipe;

[0037] A mixing pump is connected to the mixing outlet pipe.

[0038] Furthermore, the mixed liquid supply system mainly consists of a mixed liquid storage tank, a mixed liquid pump, and a mixed liquid outlet pipe. The mixed liquid storage tank stores the prepared mixed liquid and is typically made of corrosion-resistant stainless steel or plastic to prevent corrosion. Before use, the composition and concentration of the mixed liquid must be accurately prepared in the storage tank according to the composition of the flue gas and the treatment requirements. When the device starts working, the mixed liquid pump is activated. The pump generates pressure through the high-speed rotation of the impeller, drawing the mixed liquid from the storage tank. Under pressure, the mixed liquid flows along the outlet pipe and eventually enters the atomizing nozzle in the primary mixing chamber. The diameter and material of the outlet pipe must be rationally selected based on factors such as the flow rate, pressure, and corrosiveness of the mixed liquid to ensure a stable and smooth delivery of the mixed liquid to the atomizing nozzle, providing a sufficient source of mixed liquid for continuous and efficient mixing of flue gas and mixed liquid.

[0039] Preferably, the floc separation component includes:

[0040] A first stirring rod is rotatably connected to the floc separation tank, and the first stirring rod extends to the bottom of the floc separation tank;

[0041] A first stirring motor is connected to the flocculant separation tank, and the first stirring rod is connected to the rotating end of the first stirring motor.

[0042] A chelating agent tank, which is connected to the flocculant separation tank;

[0043] A first floc extraction pipe is connected to the floc separation tank and extends to the bottom of the floc separation tank.

[0044] Furthermore, the first stirring rod in the flocculant separation component is rotatably connected to the flocculant separation tank via rotating connectors such as bearings, with one end extending to the bottom of the tank. The first stirring motor is installed at a suitable position on the top or side of the flocculant separation tank, and its rotating end is connected to the first stirring rod via couplings or other connecting components to ensure effective power transmission. When the mixture flows into the flocculant separation tank, the first stirring motor is started, driving the first stirring rod to rotate at high speed. During rotation, the first stirring rod thoroughly stirs the mixture in the tank, creating strong turbulence and increasing the collision probability of various components. Simultaneously, the chelating agent tank is connected to the flocculant separation tank via connecting pipes and control valves. Based on the preset addition amount and time, the control valve is opened, slowly adding the chelating agent from the chelating agent tank into the flocculant separation tank. Under stirring, the chelating agent rapidly disperses in the liquid, reacting with heavy metal ions and other harmful substances in the liquid to form insoluble chelates. These chelates gradually aggregate to form flocculants.

[0045] In addition, the first flocculant extraction pipe is connected to the bottom side of the flocculant separator, with one end extending into the bottom of the separator to ensure that the flocculant settled at the bottom can be extracted. After the flocculant has settled to a certain extent at the bottom of the tank, it is drawn into the first flocculant extraction pipe and transported through pipelines to subsequent treatment equipment or locations for further processing. During the extraction process, it is important to control the flow rate and pressure of the extraction pump to avoid excessively fast extraction speeds that could introduce impurities or excessive extraction pressures that could damage the equipment. Furthermore, the first flocculant extraction pipe should be regularly inspected and cleaned to prevent blockages that could affect the extraction efficiency.

[0046] Preferably, it also includes a secondary flocculant separation unit, which comprises:

[0047] A secondary flocculant separator is connected to the first flocculant extraction pipe;

[0048] A first flocculant extraction pump is connected to the first flocculant extraction pipe;

[0049] The second stirring rod is rotatably connected to the secondary flocculant separator and extends to the bottom of the secondary flocculant separator.

[0050] The second floc extraction pipe is connected to the secondary floc separation tank and extends to the bottom of the secondary floc separation tank.

[0051] The second stirring motor is connected to the secondary separation tank of the flocculant, and the second stirring rod is connected to the rotating end of the second stirring motor.

[0052] Furthermore, the second stirring rod is rotatably connected to the secondary flocculant separator via bearings and other rotating connectors, with one end extending to the bottom of the secondary flocculant separator. Once the flocculants enter the secondary flocculant separator, the second stirring motor connected to the second stirring rod is activated. The motor drives the second stirring rod to rotate at a certain speed. During rotation, the second stirring rod further agitates the flocculants within the tank. During agitation, the stirring blades on the second stirring rod propel the flocculants through the tank, causing them to collide and aggregate. For example, initially dispersed fine flocculants gradually combine into larger flocs under agitation, and these larger flocs are more easily precipitated and separated. During agitation, it is crucial to observe the agitation effect to ensure the flocculants are thoroughly agitated. The stirring speed and time should be adjusted as needed based on the properties of the flocculants and the actual agitation effect.

[0053] In addition, after the flocculants are agitated and aggregated again in the secondary flocculant separator, they need to be extracted through the second flocculant extraction pipe. The second flocculant extraction pipe is connected to the bottom side of the secondary flocculant separator, with one end extending to the bottom of the separator to ensure that the flocculants settled at the bottom can be extracted. Before extraction, check that the second flocculant extraction pipe is unobstructed and that the valves can open and close normally. After confirming everything is in order, start the extraction pump connected to the second flocculant extraction pipe. The extraction pump generates negative pressure; under the pressure difference, the flocculants at the bottom of the tank are drawn into the second flocculant extraction pipe and transported through pipelines to subsequent flocculant sedimentation tanks and other treatment equipment for further processing. During the extraction process, the flow rate and pressure of the extraction pump must also be controlled to ensure the stability and safety of the extraction process.

[0054] Preferred options also include:

[0055] The return pipe has one end connected to the flocculant separator and the other end connected to the secondary flocculant separator, and is located at the top of the secondary flocculant separator.

[0056] Furthermore, since the flocs will accumulate in the lower layer, the return pipe is installed above the secondary floc separation tank. The return pipe will transport the upper liquid to the floc separation tank to ensure that the subsequent separation of heavy metals in the sulfur-containing wastewater is more thorough and to reduce the residue of heavy metals or other substances.

[0057] Preferred options also include:

[0058] A flocculant sedimentation tank, wherein the outlet end of the second flocculant extraction pipe is located inside the flocculant sedimentation tank;

[0059] A second floc extraction pump is connected to the second floc extraction pipe.

[0060] Furthermore, the outlet end of the second flocculant extraction pipe is connected via a pipeline and accurately positioned within the flocculant settling tank. Generally, the outlet end is placed near the center of the settling tank at a certain height from the bottom, typically 1-2 meters. This ensures that the extracted flocculants are evenly dispersed upon entering the settling tank, preventing concentrated sedimentation in any one area. Once the flocculants are extracted into the settling tank through the second flocculant extraction pipe, they begin to settle under gravity. During the settling process, larger flocs settle to the bottom first, while smaller particles continue to collide and aggregate, gradually forming larger flocs that then settle. The settling time varies depending on the properties and concentration of the flocculants, generally ranging from 1-2 hours. During the settling process, it is important to observe the sedimentation in the settling tank. The height of the sediment and the clarity of the supernatant can be monitored in real time using observation windows installed on the tank wall or level gauges. Once the flocculants have settled, the supernatant is relatively clear, at which point the second flocculant extraction pump can be activated as needed. The second flocculant extraction pump is connected to the second flocculant extraction pipe via a pipeline. Once started, it extracts the supernatant from the sedimentation tank and transports it to subsequent treatment processes, such as further filtration and disinfection, to achieve higher water quality standards. The flocculants settled at the bottom of the tank can be cleaned periodically as needed. This can be done by using a sludge scraper to scrape the flocculants to the sludge collection hopper at the bottom of the sedimentation tank, and then discharging them through the sludge discharge pipe for specialized treatment and disposal.

[0061] The advantages of this utility model compared with the prior art are as follows:

[0062] 1. The flue gas cooling tank and its internal cooling chamber, in conjunction with the flue gas cooling components, can quickly and effectively cool the flue gas entering from the flue gas duct. Through its cooling design, the flue gas temperature can be precisely controlled within a suitable range for subsequent treatment, preventing excessively high flue gas temperatures from adversely affecting subsequent processes such as flue-liquid mixing and flocculation separation. This ensures the stability and reliability of the entire desulfurization wastewater treatment process and improves treatment efficiency.

[0063] 2. The flocculant separation unit consists of a flocculant separation tank and a flocculant separation component. Its inlet end is connected to the outlet end of the flue-liquid mixing tank. After the flue-liquid mixing reaction, the mixture enters the flocculant separation tank. Under the action of the flocculant separation component, the flocculants in the mixture are efficiently separated from the clean water. This reduces the amount of flocculants entering subsequent processes and avoids the problem of flocculants clogging the pipelines of subsequent processes. Attached Figure Description

[0064] Figure 1 A partial structural diagram of a desulfurization wastewater treatment device provided in this embodiment of the present invention. Figure 1 ;

[0065] Figure 2 for Figure 1 Enlarged structural diagram at point Q;

[0066] Figure 3 A schematic diagram of the overall structure of a desulfurization wastewater treatment device provided in this embodiment of the utility model. Figure 1 ;

[0067] Figure 4 for Figure 3 Enlarged structural diagram at point W;

[0068] Figure 5 A schematic diagram of the overall structure of a desulfurization wastewater treatment device provided in this embodiment of the utility model. Figure 2 ;

[0069] Figure 6 A schematic diagram of the overall structure of a desulfurization wastewater treatment device provided in this embodiment of the utility model. Figure 3 .

[0070] Explanation of reference numerals in the attached figures:

[0071] 1. Flue gas cooling tank; 11. Cooling chamber; 12. Cooling water chamber; 13. Water outlet chamber;

[0072] 2. Flue gas duct;

[0073] 3. Flue gas cooling components; 31. Cooling cylinder; 32. Cooling water tank; 33. Cooling water outlet pipe; 34. Cooling water inlet end; 35. Cooling water pump; 36. Cooling water recovery components; 361. Outlet water recovery box;

[0074] 4. Flue gas mixing tank;

[0075] 5. Smoke-liquid mixing component; 51. Smoke-liquid mixing cylinder; 511. Preliminary mixing chamber; 512. Smoke chamber; 5121. Smoke outer chamber; 5122. Smoke inner chamber; 5123. First connecting hole; 5124. Second connecting hole; 5125. Third connecting hole; 52. Smoke connecting pipe; 53. Atomizing nozzle; 54. Mixture supply component; 541. Mixture storage tank; 542. Mixture outlet pipe; 543. Mixture pump;

[0076] 6. Flocculation separation component; 61. Flocculation separation tank; 62. Flocculation separation part; 621. First stirring rod; 622. First stirring motor; 623. Chelating agent tank; 624. First floc extraction pipe; 63. Secondary floc separation component; 631. Secondary floc separation tank; 632. First floc extraction pump; 633. Second stirring rod; 634. Second floc extraction pipe; 635. Second stirring motor; 64. Return pipe; 65. Flocculation sedimentation tank; 66. Second floc extraction pump;

[0077] 7. Drainage pipe;

[0078] 8. Neutralization reaction components; 81. Neutralization reaction vessel; 82. Neutralization pump;

[0079] 9. Terminal sedimentation tank; 91. Sedimentation connection pipe. Detailed Implementation

[0080] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0081] Example 1:

[0082] See Figures 1 to 6 As shown, this utility model discloses a desulfurization wastewater treatment device, including a flue gas cooling tank 1, a flue gas cooling component 3, a flue gas-liquid mixing tank 4, a flue gas-liquid mixing component 5, a flocculant separator 6, and a drain pipe 7. The flue gas cooling tank 1 has a flue gas pipe 2 connected to its flue gas inlet end, and a cooling chamber 11 is provided inside the flue gas cooling tank 1. The flue gas cooling component 3 is connected inside the cooling chamber 11. The inlet end of the flue gas-liquid mixing tank 4 is connected to the outlet end of the flue gas cooling tank 1. The flue gas-liquid mixing component 5 is connected to the upper end of the flue gas-liquid mixing tank 4. The flocculant separator 6 includes a flocculant separator 61 with its inlet end connected to the outlet end of the flue gas-liquid mixing tank 4 and a flocculant separation component 62 connected to the flocculant separator 61. The drain pipe 7 is connected to another outlet of the flue gas-liquid mixing tank 4.

[0083] In this embodiment, the high temperature of the flue gas in the thermal power generator set is usually greater than 140°C. If the flue gas temperature is too high, it will accelerate the corrosion of the metal components in the absorption tower. At the same time, the high temperature will reduce the supersaturation of the dihydrate gypsum in the liquid, making it easy for hard scale to form and block the components. If the temperature is too low, the crystallization rate of the dihydrate gypsum in the liquid will slow down, affecting the dehydration efficiency.

[0084] In addition, the flue gas cooling tank 1 and its internal cooling chamber 11, in conjunction with the flue gas cooling component 3, can quickly and effectively cool the flue gas entering from the flue gas duct 2. Through this cooling design, the flue gas temperature can be precisely controlled within a suitable range for subsequent treatment, avoiding adverse effects on subsequent processes such as flue gas-liquid mixing and flocculation separation due to excessively high flue gas temperature. This ensures the stability and reliability of the entire desulfurization wastewater treatment process and improves treatment efficiency.

[0085] Meanwhile, the flue gas mixing tank 4 is connected to the outlet end of the flue gas cooling tank 1 and is equipped with a flue gas mixing component 5. This structure allows the cooled flue gas and desulfurization wastewater to fully contact and mix within the flue gas mixing tank 4. The special design of the flue gas mixing component 5 enhances the mixing effect, promotes the chemical reaction between the components in the flue gas and the pollutants in the wastewater, improves the removal efficiency of pollutants in the desulfurization wastewater, and creates favorable conditions for subsequent flocculation and separation processes.

[0086] More importantly, the flocculant separator 6 consists of a flocculant separator tank 61 and a flocculant separator component 62, with its inlet end connected to the outlet end of the tobacco-liquid mixing tank 4. After the tobacco-liquid mixing reaction, the mixture enters the flocculant separator tank 61, where the flocculant separator component 62 efficiently separates the flocculants from the water.

[0087] See Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments, the flue gas cooling tank 1 is provided with a cooling water chamber 12 and a water outlet chamber 13. The flue gas cooling component 3 includes a cooling cylinder 31, a cooling water tank 32, and a cooling water pump 35. One end of the cooling cylinder 31 is connected to the cooling water chamber 12, and the other end is connected to the water outlet chamber 13. The middle part of the cooling cylinder 31 is located in the cooling chamber 11. The outlet end of the cooling water tank 32 is connected to a cooling water outlet pipe 33. The cooling water outlet pipe 33 is connected to the cooling water inlet end of the flue gas cooling tank 1. The inlet end of the cooling water tank 32 is connected to a cooling water inlet end 34. The cooling water pump 35 is connected to the cooling water outlet pipe 33.

[0088] In this embodiment, the flue gas cooling tank 1 is equipped with a cooling water chamber 12 and an outlet water chamber 13, which, together with the cooling cylinder 31 in the flue gas cooling component 3, form a highly efficient flue gas cooling system. One end of the cooling cylinder 31 is connected to the cooling water chamber 12, the other end is connected to the outlet water chamber 13, and the middle part is placed inside the cooling chamber 11. When the flue gas enters the cooling chamber 11, the cooling water flows from the cooling water chamber 12 into the cooling cylinder 31, fully absorbing the heat of the flue gas during its flow inside the cylinder, and then flows into the outlet water chamber 13 and is discharged. This design increases the contact area and heat exchange time between the cooling water and the flue gas, enabling the flue gas temperature to be quickly and effectively reduced to a suitable range for subsequent treatment. This avoids the adverse effects of excessively high flue gas temperature on subsequent treatment stages such as flue gas-liquid mixing and flocculation separation, ensuring the stability and reliability of the entire desulfurization wastewater treatment process.

[0089] In addition, several cooling cylinders 31 are provided, and the cooling cylinders 31 are distributed along the path of flue gas movement, so that the flue gas can have full contact with the cooling cylinders 31.

[0090] Furthermore, a solenoid valve is installed in the water outlet chamber 13, and a temperature sensor is installed in the cooling cylinder 31. When the temperature sensor detects that the temperature inside the cooling cylinder 31 has reached a preset value, the solenoid valve opens to discharge the cooling water from the cooling cylinder 31, allowing the cooling water in the cooling water chamber 12 to enter the cooling cylinder 31. The solenoid valve closes when the temperature inside the cooling cylinder 31 decreases. It should be noted that the solenoid valve used here is a high-temperature solenoid valve, such as the ZCZG high-temperature solenoid valve. The temperature sensor used is a Mazurczak TF01-160 / SOG-M temperature sensor. Of course, the specific model should be selected according to the actual usage requirements; this application is not limited to a single model, and will not be elaborated upon here.

[0091] Meanwhile, the cooling water tank 32, cooling water outlet pipe 33, cooling water inlet 34, and cooling water pump 35 together constitute the cooling water circulation system. The cooling water tank 32 is continuously replenished with fresh cooling water through the cooling water inlet 34, ensuring an adequate supply of cooling water. The cooling water pump 35 is connected to the cooling water outlet pipe 33, providing power for the flow of cooling water and ensuring that the cooling water circulates within the flue gas cooling tank 1 at a stable flow rate, further enhancing the flue gas cooling effect and making the cooling process more efficient and controllable.

[0092] See Figure 5 and Figure 6 As shown, in some embodiments, a cooling water recovery component 36 is also included, which includes an outlet water recovery tank 361 connected to the outlet water chamber 13.

[0093] In this embodiment, the effluent recovery tank 361 can serve as a buffer container to temporarily store and mix the recovered cooling water. Since the temperature and flow rate of the flue gas may fluctuate at different times, the heat absorption of the cooling water will also vary, resulting in differences in the temperature of the cooling water flowing out of the outlet chamber 13. The effluent recovery tank 361 can mix these cooling waters of different temperatures evenly, making the temperature of the cooling water entering the cooling water tank 32 relatively stable. Thus, under the action of the cooling water pump 35, the temperature of the cooling water delivered to the flue gas cooling tank 1 can also remain relatively constant, thereby ensuring the stability of the flue gas cooling effect and avoiding insufficient or excessive cooling of the flue gas due to fluctuations in the cooling water temperature.

[0094] In addition, when the ambient temperature is high or the cooling water circulation system is under heavy load, the cooling water in the outlet water recovery tank 361 can be cooled to a certain extent through natural heat dissipation or by connecting simple external cooling devices, such as heat sinks or small cooling fans. After preliminary cooling, the cooling water re-enters the cooling water tank 32 to participate in circulation, which can reduce the cooling burden on the fresh cooling water in the cooling water tank 32, improve the cooling capacity of the entire cooling water circulation system, and further ensure the effective cooling of the flue gas by the flue gas cooling tank 1.

[0095] See Figure 1 , Figure 5 and Figure 6 As shown, in some embodiments, the e-liquid mixing component 5 includes an e-liquid mixing cylinder 51, a flue gas connecting pipe 52, and an atomizing nozzle 53. The e-liquid mixing cylinder 51 is connected to the upper end of the e-liquid mixing tank 4, and a preliminary mixing chamber 511 is provided in the middle of the e-liquid mixing cylinder 51. A flue gas chamber 512 is also provided inside the e-liquid mixing cylinder 51. The flue gas chamber 512 is arranged in a ring outside the preliminary mixing chamber 511, and the preliminary mixing chamber 511 is connected to the e-liquid mixing tank 4. One end of the flue gas connecting pipe 52 is connected to the cooling chamber 11, and the other end of the flue gas connecting pipe 52 is connected to the flue gas chamber 512. The atomizing nozzle 53 is located inside the preliminary mixing chamber 511, and the atomizing nozzle 53 is configured to atomize the mixture so that the atomized mixture is fully mixed with the flue gas.

[0096] In this embodiment, the preliminary mixing chamber 511 provides a dedicated mixing space for the atomized liquid mixture and flue gas. When the atomizing nozzle 53 atomizes the liquid mixture into tiny droplets and sprays them into the preliminary mixing chamber 511, the flue gas entering from the flue gas chamber 512 will initially contact and mix with these tiny droplets within the preliminary mixing chamber 511. During this process, the liquid droplets can adsorb some pollutants from the flue gas, and the heat of the flue gas will also have a certain impact on the liquid mixture, causing certain changes in their physical and chemical properties, achieving preliminary fusion, and creating favorable conditions for subsequent full reaction in the flue gas mixing tank 4.

[0097] In addition, the preliminary mixing chamber 511 is connected to the e-liquid mixing tank 4, which serves as a good transition. The flue gas and e-liquid that have undergone preliminary mixing can smoothly enter the e-liquid mixing tank 4 from the preliminary mixing chamber 511, ensuring the continuity and stability of the entire mixing system.

[0098] See Figure 1 and Figure 3 As shown, in some embodiments, the flue gas chamber 512 includes an outer flue gas chamber 5121, an inner flue gas chamber 5122, a first connecting hole 5123, a second connecting hole 5124, and a third connecting hole 5125. The outer flue gas chamber 5121 is connected to the flue gas connecting pipe 52. The inner flue gas chamber 5122 is located above the outer flue gas chamber 5121. A plurality of first connecting holes 5123 are provided, all of which are located above the outer flue gas chamber 5121. The first connecting holes 5123 are connected to the flue gas... The inner cavity 5122 is connected; a plurality of second connecting holes 5124 are provided, and the plurality of second connecting holes 5124 are all located at the bottom of the flue gas inner cavity 5122, and the second connecting holes 5124 are connected to the preliminary mixing chamber 511; a plurality of third connecting holes 5125 are provided, and the plurality of third connecting holes 5125 are all located at the top of the flue gas inner cavity 5122, and the third connecting holes 5125 are located above the second connecting holes 5124, and the third connecting holes 5125 are connected to the preliminary mixing chamber 511.

[0099] In this embodiment, the atomizing nozzle 53 atomizes the mixture, and the atomized liquid enters the flue gas chamber 512. To reduce the amount of atomized liquid entering the flue gas chamber 512, a third connecting hole 5125, a second connecting hole 5124, and a first connecting hole 5123 are provided to ensure normal flue gas flow while blocking the atomized liquid. Furthermore, to further enhance the blocking effect, the third connecting hole 5125, the second connecting hole 5124, and the first connecting hole 5123 are set in an inclined state so that the condensed water droplets, after dripping, will return to the initial mixing chamber 511.

[0100] In addition, the third connecting hole 5125 is located above the second connecting hole 5124, and the area above the second connecting hole 5124 and the third connecting hole 5125 are connected to the preliminary mixing chamber 511. As a result, the mixture collected at the bottom of the flue gas cavity 5122 will fall back into the preliminary mixing chamber 511 through the second connecting hole 5124.

[0101] See Figure 5 and Figure 6As shown, in some embodiments, a mixture supply component 54 is also included. The mixture supply component 54 includes a mixture storage tank 541 and a mixture pump 543. The mixture storage tank 541 is connected to a mixture outlet pipe 542 at the outlet end of the mixture. The mixture outlet pipe 542 is also disposed in the preliminary mixing chamber 511. The atomizing nozzle 53 is connected to the mixture outlet pipe 542. The mixture pump 543 is connected to the mixture outlet pipe 542.

[0102] In this embodiment, one end of the mixed liquid outlet pipe 542 is connected to the mixed liquid outlet end of the mixed liquid storage tank 541, and the other end is located in the preliminary mixing chamber 511 and connected to the atomizing nozzle 53. Its function is to transport the mixed liquid from the storage tank to the atomizing nozzle 53 in the preliminary mixing chamber 511. This ensures the atomization of the mixed liquid, enabling it to be fully mixed with the flue gas, thereby improving mixing efficiency and desulfurization effect. In addition, the mixed liquid pump 543 adopts a corrosion-resistant Jiangnan IHF32-25-125 PTFE-lined centrifugal pump, and this model can also be used for pump bodies that require corrosion resistance in the future. It should be noted that changing the pump body model according to actual usage requirements should also fall within the protection scope of this application.

[0103] In some embodiments, the floc separation component 62 includes a first stirring rod 621, a first stirring motor 622, a chelating agent tank 623, and a first floc extraction tube 624. The first stirring rod 621 is rotatably connected to the floc separation tank 61 and extends to the bottom of the floc separation tank 61. The first stirring motor 622 is connected to the floc separation tank 61, and the first stirring rod 621 is connected to the rotating end of the first stirring motor 622. The chelating agent tank 623 is connected to the floc separation tank 61. The first floc extraction tube 624 is connected to the floc separation tank 61 and extends to the bottom of the floc separation tank 61.

[0104] See Figure 1 and Figure 4 As shown, in this embodiment, the first stirring motor 622 typically has a certain speed regulation function, which can flexibly adjust the stirring speed of the first stirring rod 621 according to the actual treatment conditions of the desulfurization wastewater, such as wastewater flow rate, pollutant concentration, and chelating agent addition amount. For example, when the pollutant concentration in the wastewater is high, the stirring speed can be appropriately increased to enhance the mixing effect of the chelating agent and pollutants; while in the later stage of wastewater treatment, the stirring speed can be appropriately reduced to reduce damage to the already formed flocs and improve the sedimentation quality of the flocs. This adjustability allows the floc separation component 62 to adapt to different operating conditions, improving the flexibility and adaptability of the device.

[0105] In addition, the chelating agent tank 623 is connected to the flocculant separation tank 61 and is used to store and add chelating agents to wastewater. By installing appropriate metering devices, such as flow meters and level gauges, on the chelating agent tank 623, the amount of chelating agent added can be precisely controlled. This ensures that the chelating agent reacts fully with the heavy metal ions in the wastewater to form stable chelates, while avoiding waste of the chelating agent and reducing treatment costs. It should be noted that chelating agents include both synthetic and natural ones. Synthetic ones include ethylene glycol ditetraacetic acid and 1,2-cyclohexanediaminetetraacetic acid; natural ones include low-molecular-weight organic acids such as citric acid, oxalic acid, and tartaric acid, all of which have chelating capabilities. The specific composition of the chelating agent can be adapted according to actual usage requirements, and the specific composition of the chelating agent is not the focus of protection in this application, so it will not be elaborated here.

[0106] In some embodiments, the system further includes a secondary flocculant separator 63, which includes a secondary flocculant separator tank 631, a first flocculant extraction pump 632, a second stirring rod 633, a second flocculant extraction pipe 634, and a second stirring motor 635. The secondary flocculant separator tank 631 is connected to the first flocculant extraction pipe 634; the first flocculant extraction pump 632 is connected to the first flocculant extraction pipe 634; the second stirring rod 633 is rotatably connected to the secondary flocculant separator tank 631 and extends to the bottom of the secondary flocculant separator tank 631; the second flocculant extraction pipe 634 is connected to the secondary flocculant separator tank 631 and extends to the bottom of the secondary flocculant separator tank 631; the second stirring motor 635 is connected to the secondary flocculant separator tank 631, and the second stirring rod 633 is connected to the rotating end of the second stirring motor 635.

[0107] In this embodiment, the second stirring rod 633 and the second stirring motor 635 function similarly to those in the above embodiments, and will not be described in detail here. Meanwhile, an auxiliary dosing device is provided on the secondary flocculant separator 631 to add auxiliary agents, such as flocculants, to further improve the flocculation effect. Alternatively, adding multiple secondary flocculant separators 63 to enhance the flocculation effect, etc., are all within the scope of protection of this application.

[0108] In some embodiments, a return pipe 64 is also included, one end of which is connected to the flocculant separator 61, and the other end of which is connected to the secondary flocculant separator 631, and the return pipe 64 is located on the upper part of the secondary flocculant separator 631.

[0109] In this embodiment, the return pipe 64 connects the flocculant separator 61 and the secondary flocculant separator 631, forming a liquid circulation channel. During the desulfurization wastewater treatment process, after the flocculant separator 61 completes the initial flocculation separation, some liquid may still contain unreacted flocculant, tiny flocculant particles, or components with specific chemical properties. Returning this portion of liquid to the secondary flocculant separator 631 via the return pipe 64 enables resource reuse, improves the efficiency of flocculant use, and reduces reagent waste.

[0110] See Figure 5 and Figure 6 As shown, in some embodiments, the system further includes a flocculant sedimentation tank 65 and a second flocculant extraction pump 66, with the outlet end of the second flocculant extraction pipe 634 located inside the flocculant sedimentation tank 65; the second flocculant extraction pump 66 is connected to the second flocculant extraction pipe 634.

[0111] In this embodiment, the flocculant settling tank 65 further refines the flocculant treatment process. The second flocculant extraction pipe 634 transports the flocculants separated in the secondary flocculant separator 631 to the settling tank 65. This design achieves functional zoning of the flocculants from separation to settling. The settling tank 65 provides a relatively static environment for the flocculants, which is conducive to further settling and concentration, allowing for better separation of water from the flocculants and increasing their solids content.

[0112] Example 2:

[0113] It is important to note that this application includes temperature sensors installed inside the cooling cylinder 31 and at the outlet of the flue gas cooling tank 1 to monitor the cooling water temperature and flue gas outlet temperature in real time; high-temperature solenoid valves installed on each branch of the water outlet chamber 13; a frequency converter used to control the operating frequency of the cooling water pump 35, thereby adjusting the cooling water flow rate; and a PLC controller that receives sensor signals, executes control algorithms, and outputs control commands. The PLC automatically adjusts the frequency converter of the cooling water pump 35 using a PID algorithm based on the flue gas flow rate (provided by the front-end instruments) and the set temperature, changing the total cooling water flow rate to achieve macroscopic temperature regulation. Temperature sensors inside each cooling cylinder 31 monitor the internal cooling water temperature in real time. When the temperature of a branch exceeds the set upper limit (e.g., 85℃), the PLC immediately instructs the high-temperature solenoid valve on that branch to open, discharging the high-temperature cooling water, while simultaneously replenishing it with low-temperature water from the cooling water chamber 12, achieving rapid cooling of that branch. Once the temperature drops to the lower limit (e.g., 75℃), the solenoid valve closes. This method achieves localized, precise, and efficient temperature management of the heat exchanger unit. The 361 effluent water recovery tank can be equipped with a temperature sensor and a miniature cooling fan. When the return water temperature remains high, the PLC can automatically start the fan for forced air cooling to assist in cooling and reduce the load on the cooling water system.

[0114] Flow meters are installed on the flue gas connecting pipe 52 and the mixed liquid outlet pipe 542 to monitor the flue gas flow rate and the mixed liquid flow rate, respectively. A pH sensor or ORP sensor is installed in the flue-liquid mixing tank 4 to monitor the acidity or alkalinity or redox potential of the reaction environment. A regulating valve and a metering pump are connected to the chelating agent tank 623 to control the amount of chelating agents, neutralizing agents, and other reagents added.

[0115] Preferably, the PLC automatically adjusts the speed of the mixing pump 543 (via a frequency converter) or the opening of the pipeline regulating valve according to the preset gas-liquid ratio (e.g., 1:1.5) based on real-time data from the flue gas flow meter, precisely controlling the amount of mixed liquid added to ensure the sufficiency of the chemical reaction. A pH / ORP sensor monitors the water quality parameters after the mixing reaction in real time. Based on the deviation between the monitored and set values, the PLC dynamically fine-tunes the flow rate of the mixing pump or precisely adds small amounts of acid, alkali, or oxidant via a metering pump to stabilize the reaction environment within the optimal range.

[0116] Meanwhile, sludge concentration meters or turbidity meters are installed in the flocculant separation tank 61 and the secondary separation tank 631 for online monitoring of sludge concentration and supernatant turbidity. Level gauges are installed in each stage of the separation tank and sedimentation tank for real-time monitoring of level changes. A frequency converter is also provided to control the speeds of the first stirring motor 622, the second stirring motor 635, and the first and second flocculant extraction pumps 632 and 66.

[0117] Its control method is as follows:

[0118] In the floc separation tank 61, the PLC automatically controls the speed of the first stirring motor 622 based on feedback from the influent load and the sludge concentration meter. Initially, high-speed stirring promotes mixing, while later, low-speed stirring facilitates floc growth and sedimentation, preventing the flocs from being broken.

[0119] In the secondary separation tank 631, the second stirring motor 635 can use a lower speed stirring, mainly to maintain suspension and promote sludge thickening;

[0120] The PLC determines the sludge layer thickness and concentration based on data from the level gauge and sludge concentration meter. When the concentration reaches the set value and the level rises to the sludge discharge port, the first flocculant extraction pump 632 automatically starts, discharging the high-concentration sludge to the secondary separation tank. Similarly, the logic controls the second flocculant extraction pump 66 to discharge the concentrated sludge into the flocculant sedimentation tank 65. This method avoids the blindness of traditional timed sludge discharge, ensuring the highest concentration of discharged sludge. As a result, the sludge moisture content entering the sedimentation tank 65 can be reduced to below 97%, greatly reducing the load on subsequent dewatering equipment, and the turbidity of the supernatant can be stably controlled below 5 NTU. A PLC main station or DCS system is set up in the central control room, integrating the control logic of all subsystems, and displaying the entire process diagram, real-time data, trend curves, and equipment status on a touch screen or industrial computer.

[0121] Example 3:

[0122] See Figure 5 and Figure 6 As shown, this application also includes a neutralization reaction component 8, which includes a neutralization reaction tank 81 and a neutralization pump 82 connected to the neutralization reaction tank 81. A drain pipe 7 is connected to the neutralization reaction tank 81, and the neutralization pump 82 is connected to the middle of the drain pipe 7. The neutralization pump 82 is used to pump the waste liquid in the drain pipe 7 to the neutralization reaction tank 81. A feeding end is provided on the neutralization reaction tank 81 for adding neutralizing reagent to complete the neutralization reaction. It should be noted that the alkaline substance in the neutralization reaction reagent needs to be a substance that can neutralize the desulfurization wastewater. The alkaline substance in the neutralization reaction reagent can be calcium hydroxide, sodium hydroxide, etc.

[0123] In addition, it also includes an end sedimentation tank 9, which is connected to a sedimentation connection pipe 91, and the sedimentation connection pipe 91 is connected to the neutralization reaction tank 81.

[0124] The desulfurization wastewater, after treatment by the aforementioned processes, typically still exhibits an acidic pH. Direct discharge would corrode pipes and damage the aquatic ecosystem. The core function of the neutralization reactor 8 is to neutralize the pH of the wastewater to the required discharge range. Many heavy metal ions form water-insoluble hydroxide precipitates in alkaline environments. The neutralization process provides favorable conditions for further removal of these trace dissolved heavy metals, supplementing and ensuring the effectiveness of the upstream chelation precipitation. The neutralization reactor 81 is the container for the neutralization reaction, ensuring thorough mixing and reaction between the reagents and the wastewater. The neutralization pump 82 pumps the pretreated wastewater from the flue gas mixing tank 4 into the potentially higher-positioned neutralization reactor 81, ensuring smooth fluid transport and system continuity. The feeding end on the neutralization reactor 81 connects to an automatic dosing system. This system includes a reagent dissolving tank, a metering pump, an online pH monitor, and a PLC control unit. The pH sensor monitors the pH value inside the tank in real time and feeds the signal back to the control system. The control system then precisely controls the start, stop and frequency of the metering pump to achieve automatic and precise dosing of neutralizing agents such as calcium hydroxide or sodium hydroxide.

[0125] Preferably, the wastewater discharged from the neutralization reaction tank 81 contains a large amount of newly formed metal hydroxide precipitates such as Fe(OH)3, Al(OH)3, CaSO4, CaCO3, and other suspended solids. The terminal sedimentation tank 9 provides sufficient static settling time and space for these suspended solids, achieving thorough sludge-water separation.

[0126] In specific implementation of this utility model:

[0127] Flue gas cooling: The flue gas to be treated enters the cooling chamber 11 of the flue gas cooling tank 1 through the flue gas pipe 2. Simultaneously, the cooling water pump 35 is activated, delivering cooling water from the cooling water tank 32 to the cooling water chamber 12 of the flue gas cooling tank 1. The cooling water flows within the cooling cylinder 31, exchanging heat with the flue gas in the cooling chamber 11. After absorbing heat from the flue gas, the water enters the outlet chamber 13 and finally flows into the outlet water recovery tank 361. The cooled flue gas flows out from the outlet end of the flue gas cooling tank 1.

[0128] Flue gas and liquid mixing: The cooled flue gas enters the outer flue gas chamber 5121 of the flue gas chamber 512 through the flue gas connecting pipe 52, then enters the inner flue gas chamber 5122 through the first connecting hole 5123, and then enters the preliminary mixing chamber 511 through the second connecting hole 5124 and the third connecting hole 5125 respectively. At the same time, the mixing liquid pump 543 is started to deliver the mixing liquid in the mixing liquid storage tank 541 to the atomizing nozzle 53. The atomizing nozzle 53 atomizes the mixing liquid and sprays it into the preliminary mixing chamber 511, where it is fully mixed with the flue gas entering the preliminary mixing chamber 511. The mixed flue gas and liquid enter the flue gas and liquid mixing tank 4 for further mixing reaction. After the fully mixed reaction, part of the substance is discharged through the drain pipe 7 for subsequent processing, and the other part flows out from the outlet end of the flue gas and liquid mixing tank 4.

[0129] Flocculation Separation: The liquid containing flocculants flowing from the flue gas mixing tank 4 enters the flocculant separation tank 61. A chelating agent is added to the flocculant separation tank 61, and the first stirring motor 622 is started, driving the first stirring rod 621 to rotate, stirring the liquid in the tank and promoting the separation of flocculants. The separated flocculants settle at the bottom of the flocculant separation tank 61. The first flocculant extraction pump 632 is started, and the flocculants are extracted through the first flocculant extraction pipe 624 to the secondary flocculant separation tank 631. In the secondary flocculant separation tank 631, the second stirring motor 635 is started, driving the second stirring rod 633 to rotate, further separating the flocculants. During the separation process, a portion of the liquid flows back to the flocculant separation tank 61 through the return pipe 64. After secondary separation, the flocs are deposited at the bottom of the secondary floc separation tank 631. The second floc extraction pump 66 is started to extract the flocs through the second floc extraction pipe 634 to the floc sedimentation tank 65 for sedimentation treatment. The settled flocs can be collected and disposed of in subsequent processes.

[0130] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A desulfurization wastewater treatment device, characterized in that, include: The flue gas cooling tank (1) has a flue gas pipe (2) connected to its flue gas inlet end, and the flue gas cooling tank (1) is provided with a cooling chamber (11). A flue gas cooling component (3) is connected to the cooling cavity (11); The flue gas mixing tank (4) has its inlet end connected to the outlet end of the flue gas cooling tank (1); The e-liquid mixing component (5) is connected to the upper end of the e-liquid mixing tank (4); The flocculant separator (6) includes a flocculant separator (61) whose inlet end is connected to the outlet end of the flue gas mixing tank (4) and a flocculant separator component (62) connected to the flocculant separator (61). The drain pipe (7) is connected to another outlet of the flue gas mixing tank (4).

2. The desulfurization wastewater treatment device as described in claim 1, characterized in that, The flue gas cooling tank (1) is provided with a cooling water chamber (12) and a water outlet chamber (13), and the flue gas cooling component (3) includes: The cooling cylinder (31) has one end connected to the cooling water chamber (12) and the other end connected to the water outlet chamber (13), and the middle part of the cooling cylinder (31) is located in the cooling chamber (11). The cooling water tank (32) has a cooling water outlet pipe (33) connected to its outlet end. The cooling water outlet pipe (33) is connected to the cooling water inlet end of the flue gas cooling tank (1), and the water inlet end of the cooling water tank (32) is connected to the cooling water inlet end (34). A cooling water pump (35) is connected to the cooling water outlet pipe (33).

3. The desulfurization wastewater treatment device as described in claim 2, characterized in that, It also includes a cooling water recovery unit (36), which comprises: The water recovery tank (361) is connected to the water outlet chamber (13).

4. The desulfurization wastewater treatment device as described in claim 1, characterized in that, The e-liquid mixing component (5) includes: A tobacco liquid mixing cylinder (51) is connected to the upper end of the tobacco liquid mixing tank (4), and a preliminary mixing chamber (511) is provided in the middle of the tobacco liquid mixing cylinder (51). A flue gas chamber (512) is also provided inside the tobacco liquid mixing cylinder (51). The flue gas chamber (512) is arranged in a ring outside the preliminary mixing chamber (511), and the preliminary mixing chamber (511) is connected to the tobacco liquid mixing tank (4). A flue gas connecting pipe (52) is connected at one end to the cooling chamber (11) and at the other end to the flue gas chamber (512). Atomizing nozzle (53) is located in the preliminary mixing chamber (511) and is configured to atomize the mixture so that the atomized mixture is fully mixed with the flue gas.

5. The desulfurization wastewater treatment device as described in claim 4, characterized in that, The flue gas chamber (512) includes: The flue gas outer cavity (5121) is connected to the flue gas connecting pipe (52); The flue gas inner cavity (5122) is located above the flue gas outer cavity (5121); The first connecting hole (5123) is provided in a plurality of them, and the plurality of first connecting holes (5123) are all provided above the flue gas outer cavity (5121), and the first connecting hole (5123) is connected to the flue gas inner cavity (5122); The second connecting hole (5124) is provided in a plurality of them. The plurality of second connecting holes (5124) are all provided at the bottom of the flue gas inner cavity (5122). The second connecting hole (5124) is connected to the preliminary mixing cavity (511). The third connecting hole (5125) is provided in a plurality of them. All the third connecting holes (5125) are provided at the top of the flue gas inner cavity (5122), and the third connecting hole (5125) is located above the second connecting hole (5124). The third connecting hole (5125) is connected to the preliminary mixing cavity (511).

6. The desulfurization wastewater treatment device as described in claim 4, characterized in that, It also includes a mixing supply unit (54), which comprises: A mixed liquid storage tank (541) is connected to a mixed liquid outlet pipe (542) at its outlet end. The mixed liquid outlet pipe (542) is also located in the preliminary mixing chamber (511). The atomizing nozzle (53) is connected to the mixed liquid outlet pipe (542). A mixing pump (543) is connected to the mixing outlet pipe (542).

7. The desulfurization wastewater treatment device as described in claim 1, characterized in that, The floc separation component (62) includes: A first stirring rod (621) is rotatably connected to the floc separation tank (61), and the first stirring rod (621) extends to the bottom of the floc separation tank (61); A first stirring motor (622) is connected to the flocculant separator (61), and the first stirring rod (621) is connected to the rotating end of the first stirring motor (622); A chelating agent tank (623) is connected to the flocculant separation tank (61); A first floc extraction tube (624) is connected to the floc separation tank (61) and extends to the bottom of the floc separation tank (61).

8. The desulfurization wastewater treatment device as described in claim 7, characterized in that, It also includes a secondary flocculant separation unit (63), which comprises: A secondary flocculant separator (631) is connected to the first flocculant extraction pipe (624); A first floc extraction pump (632) is connected to the first floc extraction pipe (624); The second stirring rod (633) is rotatably connected to the secondary flocculant separator (631), and the second stirring rod (633) extends to the bottom of the secondary flocculant separator (631); A second flocculant extraction pipe (634) is connected to the secondary flocculant separator (631) and extends to the bottom of the secondary flocculant separator (631). The second stirring motor (635) is connected to the secondary flocculant separator (631), and the second stirring rod (633) is connected to the rotating end of the second stirring motor (635).

9. The desulfurization wastewater treatment device as described in claim 8, characterized in that, Also includes: The return pipe (64) is connected at one end to the floc separation tank (61) and at the other end to the secondary floc separation tank (631), and the return pipe (64) is located at the upper part of the secondary floc separation tank (631).

10. The desulfurization wastewater treatment device as described in claim 8, characterized in that, Also includes: The outlet end of the second flocculant extraction pipe (634) is located inside the flocculant sedimentation tank (65); A second floc extraction pump (66) is connected to the second floc extraction pipe (634).

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