Furnace bottom slag hopper desulfurization wastewater treatment equipment and treatment method

Abstract

The invention relates to the field of wastewater treatment equipment, and discloses furnace bottom slag hopper desulfurization wastewater treatment equipment and method.The furnace bottom slag hopper desulfurization wastewater treatment equipment comprises a furnace slag monitoring device, a desulfurization wastewater spraying device, a countercurrent circulation device and a furnace slag discharging device, and the furnace slag monitoring device is arranged on the wall of a slag well; a plurality of slag buckets are arranged at the bottom of the slag well, shutoff doors are arranged at the bottoms of the slag buckets, the slag monitoring device can detect the temperature and distribution of slag on the shutoff doors, and the desulfurization wastewater spraying device can spray desulfurization wastewater of different flows to different positions of the shutoff doors according to monitoring results of the slag monitoring device. The countercurrent circulation device can supply air from the shut-off door, countercurrent opposite to the falling direction of the desulfurization wastewater is formed after slag heating, the slag discharge device is used for controlling opening and closing of the shut-off door, and the treatment capacity of the desulfurization wastewater can be improved. The invention also discloses a method for treating desulfurization wastewater by using the desulfurization wastewater treatment equipment for the furnace bottom slag hopper.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wastewater treatment equipment, in particular to a slag hopper desulfurization wastewater treatment equipment. In addition, the present application also relates to a slag hopper desulfurization wastewater treatment method. BACKGROUND

[0002] Coal-fired power plants are power plants that use the heat generated by burning coal to generate electricity. In the working process of coal-fired power plants, a large amount of coal is burned. The coal usually contains a certain amount of combustible sulfur, such as organic sulfur and pyrite sulfur. When the coal is burned to produce carbon dioxide flue gas, the combustible sulfur will also be burned to produce SO2 and SO3 mixed in the flue gas. SO2 and SO3 are easily dissolved in water to form sulfurous acid and sulfuric acid, respectively. Both of them have strong corrosive effects. When they are discharged into the atmosphere, they can corrode machines and equipment and buildings, reduce crop yields or cause vegetation to wither, and also harm human health, causing bronchitis, asthma, and pulmonary heart disease, and even death. Therefore, desulfurization treatment is needed before the coal-fired flue gas is discharged.

[0003] The flue gas desulfurization of coal-fired power plants produces a large amount of desulfurization wastewater. The composition of the desulfurization wastewater is complex. In addition to containing sulfite and sulfate produced by desulfurization, it also contains other inorganic salts such as chlorides, heavy metals, and other suspended solids. It cannot be discharged into the environment and needs to be treated. Common desulfurization wastewater technologies mainly include evaporation crystallization, flue gas spray drying, and membrane concentration. Among them, flue gas spray drying uses high-temperature flue gas in the flue to evaporate the water in the desulfurization wastewater. The evaporation of water does not require additional energy consumption. Salt crystallization is adsorbed by fly ash and collected with fly ash by dust removal equipment for use as road paving materials, etc. No solid waste that needs to be treated is produced, so it has been widely applied.

[0004] The existing flue gas spray drying equipment sprays desulfurization wastewater into the flue. The heat utilization rate of the flue gas in the flue is low, and the amount of desulfurization wastewater that can be treated is small. A large amount of desulfurization wastewater crystallization is adsorbed on the fly ash in the flue gas, which has a large corrosive effect on the flue, and is easy to cause damage to the flue. SUMMARY

[0005] In order to improve the treatment amount of desulfurization wastewater, the present application provides a slag hopper desulfurization wastewater treatment equipment and a treatment method.

[0006] The slag hopper desulfurization wastewater treatment equipment provided by the present application adopts the following technical scheme: The application discloses a slag hopper desulfurization wastewater treatment equipment, which comprises a slag monitoring device, a desulfurization wastewater spraying device, a countercurrent circulation device and a slag discharging device.

[0007] The slag monitoring device arranged on the wall of the slag well can monitor the position of the slag formed by the combustion of coal in the slag well and the accumulation amount of the slag on the closing door, so that the heat of the slag can be fully utilized to evaporate the water in the desulfurization wastewater, and the treatment amount of the desulfurization wastewater is improved. The desulfurization wastewater spraying device can spray the desulfurization wastewater to more positions of the slag on the closing door with a larger flow, so that the heat of the slag can be fully utilized to evaporate the water in the desulfurization wastewater, and the temperature of the slag on the closing door is effectively reduced to prevent the slag from being glued due to the excessively high temperature. The countercurrent circulation device can utilize the heat of the slag to heat the air flow to form hot air, and the hot air flows from the closing door to the upper part of the slag hopper, and the hot air and the desulfurization wastewater mist sprayed from the upper part to the closing door direction flow in the opposite direction, so that the hot air and the mist fully contact and exchange heat, the amount of the water evaporated from the mist is improved, and the treatment amount of the desulfurization wastewater is improved. The slag discharging device arranged on the bottom of the slag hopper can control the opening and closing of the closing door, the desulfurization wastewater is treated when the closing door is closed, and the loss of the heat of the slag through the closing door in the treatment process is reduced; when the accumulation amount of the slag is large, the closing door is opened to discharge the slag, and the smoothness of the slag discharging path is ensured.

[0008] In a specific embodiment, the slag monitoring device comprises a monitoring probe and an image processing unit, the monitoring probe comprises at least two of an electromagnetic wave radar, a laser radar, a dual-light camera, an infrared camera and a visible light camera, the monitoring probe is arranged on the wall of the slag well and faces the closing door, and the image processing unit is connected with the monitoring probe and can process the images collected by the monitoring probe to obtain the distribution information of the slag on the closing door.

[0009] By using the above technical scheme, at least two of the electromagnetic wave radar, the laser radar, the dual-light camera, the infrared camera and the visible light camera are used as the monitoring probe, the real-time falling image of the slag in the slag pot, the distribution image of the slag on the closing door and the temperature field thereof can be more accurately monitored through two or more different image information, the real-time falling amount of the slag, the distribution position of the slag on the closing door and the distribution amount of the slag at different positions on the closing door are accurately extracted from the image by the image processing unit, so that the desulfurization wastewater is accurately guided to be sprayed to different positions on the closing door, and the flow of the desulfurization wastewater sprayed to different positions, the heat contained in the slag is more fully utilized for evaporation of water in the desulfurization wastewater, and the treatment amount of the desulfurization wastewater is improved.

[0010] In a specific implementable scheme, the slag monitoring device at least includes an infrared camera or a dual-light camera.

[0011] By using the above technical scheme, the temperature field on the closing door can be accurately acquired by using the infrared camera or the dual-light camera, so that a larger flow of desulfurization wastewater can be guided to be sprayed to a region with a higher temperature on the closing door, and the sensible heat resource contained in the slag is fully utilized.

[0012] In a specific implementable scheme, the desulfurization wastewater spraying device includes a desulfurization wastewater driving pump, a desulfurization wastewater pressure control valve, a desulfurization wastewater flow valve and a desulfurization wastewater sprayer, the desulfurization wastewater driving pump is connected with the desulfurization wastewater sprayer through a pipeline, the desulfurization wastewater pressure control valve and the desulfurization wastewater flow valve are sequentially arranged on the connecting pipeline between the desulfurization wastewater driving pump and the desulfurization wastewater sprayer, a rotating nozzle is arranged on the desulfurization wastewater sprayer, and the rotating nozzle can form rotating spray of the desulfurization wastewater and spray to different regions on the closing door.

[0013] By using the above technical scheme, the desulfurization wastewater pressure control valve and the desulfurization wastewater flow valve arranged on the connecting pipeline between the desulfurization wastewater driving pump and the desulfurization wastewater nozzle can control the pressure and the flow of the desulfurization wastewater flowing to the plurality of desulfurization wastewater nozzles respectively, so as to control the atomization effect and the flow of the desulfurization wastewater sprayed through the plurality of desulfurization wastewater nozzles, and ensure that the water in the desulfurization wastewater with a larger flow is fully evaporated. The rotating nozzle arranged on the desulfurization wastewater sprayer can form rotating spray of the desulfurization wastewater, and improve the atomization effect of the desulfurization wastewater.

[0014] In one specific embodiment, the desulfurization wastewater injector is a slag bucket spray gun, a desulfurization wastewater injection hole is arranged on the side wall of the slag bucket, a spray hole cover plate and a cover plate cylinder are arranged on the outer side wall of the slag bucket, the cover plate cylinder is fixed on the slag bucket, and a piston rod is connected with the spray hole cover plate, a gun head rotating hole is arranged on the spray hole cover plate, the spray hole cover plate is slidingly connected on the side wall of the slag bucket and can slide under the driving of the cover plate cylinder, so that the spray hole cover plate closes the desulfurization wastewater injection hole, or the gun head rotating hole corresponds to the desulfurization wastewater injection hole, the slag bucket spray gun comprises a spray gun seat, a multi-dimensional motion arm and a spray gun head, the spray gun seat is arranged on the outer side of the slag bucket, the multi-dimensional motion arm is fixed on the spray gun seat and connected with the spray gun head, the spray gun head is connected with the desulfurization wastewater driving pump through a pipeline, a rotating nozzle is arranged at the end of the spray gun head, a spherical support matched with the gun head rotating hole is arranged on the spray gun head, the cover plate cylinder can act under the control of the monitoring result of the slag monitoring device, and the slag bucket spray gun can insert the spray gun head into the desulfurization wastewater injection hole through the gun head rotating hole and adjust the spraying direction of the rotating nozzle under the control of the monitoring result of the slag monitoring device.

[0015] By adopting the above technical scheme, the desulfurization wastewater injection hole and the spray hole cover plate arranged on the slag bucket can be opened to inject desulfurization wastewater into the slag bucket when needed, the spray gun head of the slag bucket spray gun can be inserted into the slag bucket to inject desulfurization wastewater into the slag bucket, and the spray gun head can be extracted and the spray hole cover plate can be moved to close the desulfurization wastewater injection hole after the desulfurization wastewater injection is completed, so as to ensure the isolation between the inside and outside of the slag bucket. The spray gun head connected with the multi-dimensional motion arm can conveniently control the movement of the spray gun head and adjust the orientation of the spray gun head, so that the spray gun head can be conveniently inserted into the slag bucket and the spraying direction of the desulfurization wastewater can be flexibly adjusted according to the monitoring result of the slag monitoring device.

[0016] In one specific embodiment, the desulfurization wastewater injector is a plurality of fixed spray pipes, the rotating nozzles are arranged at the ends of the fixed spray pipes, a plurality of the fixed spray pipes are arranged on the slag bucket, so that the rotating nozzles are located inside the slag bucket and each of the rotating nozzles faces a different position on the closing door, each of the fixed spray pipes is connected to the desulfurization wastewater driving pump through a pipeline, and a nozzle on-off valve and a nozzle flow valve are arranged on the connecting pipeline of each of the fixed spray pipes, and the nozzle on-off valve and the nozzle flow valve can act according to the monitoring result of the slag monitoring device.

[0017] By adopting the above technical solution, using multiple fixed nozzles pointing to different positions on the shut-off gate, the flow rate of desulfurization wastewater sprayed onto different areas of the shut-off gate can be controlled by controlling the nozzle switching valve and nozzle flow valve on the connecting pipeline to each fixed nozzle, thus ensuring that a larger flow rate of desulfurization wastewater is sprayed onto the area where the slag with more heat is located.

[0018] In one specific implementation, the counter-current circulation device includes a burnout blower and a hood, the burnout blower being connected to the hood, the hood being fixed to the shut-off door, the top of the hood being closed, and the side wall being provided with hood holes.

[0019] By adopting the above technical solution, the heat from the slag falling on the shut-off gate can be blown out using the air cap installed on the shut-off gate, forming a hot air flow that flows upwards towards the slag hopper. This allows for better heat exchange with the desulfurization wastewater injected by the desulfurization wastewater injection device, fully utilizing the sensible heat in the slag. The air cap holes on the side wall of the air cap allow more airflow to be directed towards the slag, further maximizing the utilization of the sensible heat in the slag and preventing falling slag from clogging the air cap holes.

[0020] In one specific implementation, multiple wind caps 32 are provided, and the multiple wind caps are arranged in an array on the shut-off door.

[0021] By adopting the above technical solution, multiple air caps arranged in an array on the shut-off door can blow out more heat from the slag on the shut-off door, thereby improving the utilization rate of heat in the slag.

[0022] In one specific implementation scheme, the slag discharge device includes a shut-off valve hydraulic cylinder and a hydraulic reversing valve. The shut-off valve hydraulic cylinder is located at the bottom of the slag hopper and connected to the shut-off valve. The hydraulic reversing valve is connected between the shut-off valve hydraulic cylinder and an external hydraulic circuit and can operate according to the monitoring results of the slag monitoring device.

[0023] By adopting the above technical solution, the shut-off valve hydraulic cylinder, which is installed at the bottom of the slag hopper and connected to the shut-off valve, can be conveniently opened and closed under the control of the monitoring results of the slag monitoring device. When the shut-off valve is closed, the desulfurization wastewater is heated and evaporated to maintain a high temperature environment in the slag hopper to the maximum extent, thereby improving the availability of sensible heat resources of the slag and maximizing the evaporation of water in the desulfurization wastewater. When the slag on the shut-off valve accumulates to a set amount, the shut-off valve is opened to ensure the smooth discharge of slag with insufficient sensible heat resources.

[0024] The method for treating desulfurization wastewater from the furnace bottom slag hopper provided in this application adopts the following technical solution: A method for treating desulfurization wastewater from a furnace bottom slag hopper, utilizing the furnace bottom slag hopper desulfurization wastewater treatment equipment provided in this application, includes the following steps: S10: obtaining the slag distribution in different areas of the shut-off gate; S20: obtaining the slag temperature in different areas of the shut-off gate; S30: spraying desulfurization wastewater onto the slag distribution area of ​​the shut-off gate, and controlling the spray flow rate of desulfurization wastewater in different areas so that the spray flow rate is positively correlated with the slag temperature; S40: introducing an airflow of a set flow rate from the shut-off gate area to form hot air flowing towards the top of the slag hopper; S50: obtaining the slag accumulation amount on the shut-off gate, and controlling the shut-off gate to open intermittently when the accumulation amount is greater than a set value.

[0025] By adopting the above technical solution, and by injecting a larger flow rate of desulfurization wastewater into the slag distribution area with a higher temperature on the shut-off gate, a larger flow rate of desulfurization wastewater can be treated using slag with a higher sensible heat content, thus increasing the wastewater treatment capacity. The airflow entering from the shut-off gate area can fully utilize the sensible heat in the slag on the shut-off gate to heat the airflow, forming hot air in the opposite direction to the desulfurization wastewater injection. This allows for sufficient heat exchange with the wastewater, improving the utilization efficiency of the sensible heat in the slag and maximizing the wastewater treatment capacity.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By installing various types of slag monitoring devices on the wall of the slag well, it is possible to better monitor the position of the slag falling on the shut-off gate and the slag temperature at different positions on the shut-off gate. This guides more desulfurization wastewater to be sprayed towards the area on the shut-off gate with higher slag temperature, so that the amount of desulfurization wastewater sprayed to different areas on the shut-off gate is adapted to the sensible heat in the slag, which greatly improves the utilization efficiency of sensible heat in the slag and the treatment capacity of desulfurization wastewater.

[0027] 2. By controlling the spray direction and flow rate of the desulfurization wastewater ejector in the desulfurization wastewater injection device, or by controlling the spray flow rate of multiple desulfurization wastewater ejectors spraying to different positions, it is possible to ensure that the desulfurization wastewater is concentrated in the area with higher temperature on the shut-off gate, and to ensure that the water in the desulfurization wastewater sprayed to different areas on the shut-off gate can be effectively evaporated, thus ensuring the treatment effect of the desulfurization wastewater.

[0028] 3. By installing multiple air caps of a counter-current circulation device on the shut-off gate, airflow can be introduced through the air caps, blowing out the sensible heat in the slag falling on the shut-off gate, forming hot air flowing upwards towards the slag hopper. This forms a counter-current with the desulfurization wastewater sprayed downwards towards the shut-off gate, allowing for sufficient heat exchange between the desulfurization wastewater and the hot air, thus improving the heat absorption and evaporation effect of the desulfurization wastewater. At the same time, the hot air can also drive some of the desulfurization wastewater droplets upwards, allowing them to fully contact and exchange heat with the slag falling into the slag well, further improving the evaporation effect of the water in the desulfurization wastewater.

[0029] 4. The hydraulic cylinder of the shut-off gate, which operates under the control of the slag monitoring device, can heat and evaporate the desulfurization wastewater while the shut-off gate is closed, thereby maintaining a high temperature environment in the slag hopper to the maximum extent and improving the availability of sensible heat resources in the slag. When the slag on the shut-off gate accumulates to a set amount, the shut-off gate is opened to ensure the smooth discharge of slag with insufficient sensible heat resources. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of one embodiment of the desulfurization wastewater treatment equipment for the furnace bottom slag hopper of this application.

[0031] Figure 2 This is a structural block diagram of one embodiment of the desulfurization wastewater treatment equipment for the furnace bottom slag hopper of this application.

[0032] Figure 3 This is a schematic diagram of the rotating nozzle structure in one embodiment of the desulfurization wastewater treatment equipment for the furnace bottom slag hopper of this application.

[0033] Figure 4 This is a schematic diagram showing the state of the nozzle head of the slag hopper spray gun inserted into the slag hopper in one embodiment of the desulfurization wastewater treatment equipment of the furnace bottom slag hopper of this application.

[0034] Figure 5 This is a schematic diagram of the shut-off gate structure in one embodiment of the desulfurization wastewater treatment equipment for the furnace bottom slag hopper of this application.

[0035] Figure 6 This is a flowchart of one embodiment of the desulfurization wastewater treatment method for the furnace bottom slag hopper of this application.

[0036] Figure reference numerals: 1. Slag monitoring device; 11. Monitoring probe; 12. Image processing unit; 2. Desulfurization wastewater injection device; 21. Desulfurization wastewater drive pump; 22. Desulfurization wastewater pressure control valve; 23. Desulfurization wastewater flow valve; 24. Desulfurization wastewater ejector; 241. Spray gun base; 242. Multi-dimensional motion arm; 243. Spray gun head; 244. Spherical support; 245. Nozzle switching valve; 246. Nozzle flow valve; 25. 1. Rotary nozzle; 251. Eccentric cavity; 3. Counter-current circulation device; 31. Combustion blower; 32. Air cap; 321. Air cap hole; 4. Slag discharge device; 41. Shut-off valve hydraulic cylinder; 42. Hydraulic reversing valve; 5. Slag well; 51. Slag hopper; 511. Desulfurization wastewater injection hole; 512. Injection hole cover plate; 513. Cover plate cylinder; 514. Gun head rotation hole; 515. Sliding mounting bracket; 52. Shut-off valve; 6. Controller. Detailed Implementation

[0037] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] One embodiment of the desulfurization wastewater treatment equipment in the furnace bottom slag hopper of this application is as follows: Figure 1 and Figure 2 As shown, the device includes a slag monitoring device 1, a desulfurization wastewater injection device 2, a counter-current circulation device 3, and a slag discharge device 4. The desulfurization wastewater treatment equipment in this application utilizes the sensible heat of the slag in the slag well 5 of a power plant's coal-fired boiler to evaporate the water in the desulfurization wastewater. The evaporated water crystals adhere to the slag. Multiple slag hoppers 51 are installed at the bottom of the slag well 5, and shut-off valves 52 are installed at the bottom of each hopper. Slag produced after coal combustion in the coal-fired boiler falls into the slag well 5 and lands on the shut-off valves 52 at the bottom of the hoppers 51. The shut-off valves 52 are closed by default to prevent excessive air from entering the coal-fired boiler and to prevent heat loss. When the slag accumulation on the shut-off valves 52 is large, the shut-off valves 52 are briefly opened to discharge the slag from the hoppers 51.

[0040] Several transparent observation windows are typically installed at the bottom of the slag well 5, allowing observation of the slag accumulation on the shut-off gate 52 from the outside. The slag monitoring device 1 can use various devices capable of monitoring the slag condition on the shut-off gate 52. The slag monitoring device 1 is located at the transparent observation windows on the outer wall of the slag well 5, and can acquire real-time images of the shut-off gate 52 inside the slag hopper 51 through these windows. From the images, the distribution location of the slag on the shut-off gate 52 can be extracted, and the slag temperature at different locations can be determined. The slag monitoring device 1 is typically connected to the controller 6, transmitting the acquired slag distribution information on the shut-off gate 52 to the controller 6.

[0041] The desulfurization wastewater injection device 2 can introduce desulfurization wastewater into the slag hopper 51, forming a mist that is sprayed onto the slag position on the shut-off door 52. The sensible heat in the slag heats the misty desulfurization wastewater, causing the water to evaporate and the solid components to fall and adhere to the slag, and then be discharged with the slag. A small amount of smaller solid components will rise with the airflow and be discharged with the flue gas from the coal-fired boiler, where they will be collected by the dust removal equipment.

[0042] The desulfurization wastewater injection device 2 is connected to the controller 6. The controller 6 can control the injection direction and flow rate of the desulfurization wastewater injection device 2 based on the slag distribution information on the shut-off gate 52, ensuring that the desulfurization wastewater is accurately sprayed onto the slag location on the shut-off gate 52, guaranteeing effective evaporation of the desulfurization wastewater. Furthermore, the controller 6 can also control the desulfurization wastewater injection device 2 to spray a larger flow rate of desulfurization wastewater towards areas with concentrated slag distribution and higher slag temperature, thereby fully utilizing the sensible heat in the slag on the shut-off gate 52 to evaporate more water from the desulfurization wastewater and increase the amount of desulfurization wastewater that the slag in the slag hopper 51 can handle. The desulfurization wastewater injection device 2 can be implemented using a robot or other suitable structures such as multiple water guns with propellers.

[0043] The counter-current circulation device 3 can deliver airflow to the location of the shut-off gate 52, using the airflow to blow onto the slag on the shut-off gate 52, and using the sensible heat in the slag to heat the airflow. The hot air generated by the heated airflow flows upward towards the slag hopper 51, forming a counter-current opposite to the direction of the desulfurization wastewater injection, and fully contacting the desulfurization wastewater droplets, allowing the desulfurization wastewater droplets to absorb heat and evaporate more quickly, improving the treatment efficiency of the desulfurization wastewater. The hot air can also drive some of the desulfurization wastewater droplets upward, making counter-current contact with the slag falling in the slag well 5, using the sensible heat in the falling slag to evaporate the moisture in the droplets, further improving the evaporation effect of the moisture in the desulfurization wastewater droplets.

[0044] The airflow transported by the counter-current circulation device 3 can come from air outside the slag well 5 or from flue gas in the coal-fired boiler flue. The flue gas in the flue typically has a high temperature of around 300℃, which can effectively improve the evaporation of water in the desulfurization wastewater and increase the treatment capacity of the desulfurization wastewater.

[0045] The slag discharge device 4 is located at the bottom of the slag hopper 51 and connected to the shut-off door 52, enabling the opening and closing of the shut-off door 52. The slag discharge device 4 is typically connected to a controller 6. Under the control of the controller 6, the slag discharge device 4 keeps the shut-off door 52 normally closed, preventing excessive external air from entering the coal-fired furnace through the opening at the bottom of the slag hopper 51, which could affect the combustion of coal and prevent excessive heat dissipation from the slag hopper 51. When the slag monitoring device 1 detects that the slag accumulation on the shut-off door 52 reaches a certain level, the controller 6 controls the slag discharge device 4 to briefly open the shut-off door 52, discharging the slag. A slag conveyor belt is typically installed below the shut-off door 52 to transport the slag to slag processing equipment for crushing and collection.

[0046] In some embodiments of the desulfurization wastewater treatment equipment in the furnace bottom slag hopper of this application, such as Figure 1 and Figure 2 As shown, the slag monitoring device 1 includes a monitoring probe 11 and an image processing unit 12. The monitoring probe 11 is used to acquire images above the shut-off door 52, from which it can determine the slag falling above the shut-off door 52, the position and accumulation of slag falling on the shut-off door 52, and the temperature of the slag at different positions on the shut-off door 52. Multiple monitoring probes 11 can be installed at different positions on the slag well 5 or the slag hopper 51 at its bottom, and each monitoring probe 11 points to the shut-off door 52 from different angles through a transparent observation window.

[0047] The monitoring probe 11 typically uses at least two of the following: electromagnetic radar, lidar, dual-light camera, infrared camera, and visible light camera. Alternatively, it may use a combination of electromagnetic radar and infrared camera, electromagnetic radar and dual-light camera, or lidar, infrared camera, and visible light camera. A dual-light camera refers to a camera capable of simultaneously performing near-infrared and visible light imaging. Using a combination of different types of monitoring probes 11 allows for comprehensive analysis of images acquired through different imaging methods, eliminating the influence of interference factors in the slag hopper on the imaging effect of the monitoring probe 11, ensuring the clarity of the image at the shut-off door 52, and thus clearly displaying the location, shape, accumulation amount, and temperature of the slag.

[0048] The image processing unit 12 is connected to the monitoring probe 11 and can process the images acquired by the monitoring probe 11 to obtain the distribution of slag on the shut-off door 52 and the temperature of slag at different locations from the images. The image processing unit 12 can be a separate hardware and software unit, or it can share a hardware system with the controller 6, such as using a software system in the industrial control computer that is the controller 6.

[0049] In a preferred embodiment of the desulfurization wastewater treatment equipment in the slag hopper of this application, the slag monitoring device 1 includes at least one infrared camera. Although the temperature of the slag can be indirectly determined based on the brightness of the image in the visible light image, the temperature of the slag in different areas on the shut-off gate 52 can be directly obtained from the image acquired by the infrared camera. This is beneficial for guiding a larger flow of desulfurization wastewater to be sprayed into the area with a higher temperature, thereby making better use of the sensible heat in the slag and increasing the treatment capacity of the desulfurization wastewater.

[0050] In some embodiments of the desulfurization wastewater treatment equipment in the furnace bottom slag hopper of this application, such as Figure 1 and Figure 2 As shown, the desulfurization wastewater injection device 2 includes a desulfurization wastewater drive pump 21, a desulfurization wastewater pressure control valve 22, a desulfurization wastewater flow valve 23, and a desulfurization wastewater injector 24. The desulfurization wastewater drive pump 21 drives the desulfurization wastewater to flow to the desulfurization wastewater injector 24, which then sprays it out in a mist. Depending on the type of desulfurization wastewater injector 24 used, it can be installed inside or outside the slag hopper 51. When needed, it is inserted into the slag hopper 51 through a channel provided in the wall of the slag hopper 51 to spray desulfurization wastewater at different positions on the shut-off gate 52.

[0051] The desulfurization wastewater drive pump 21 is connected to the desulfurization wastewater ejector 24 via a pipeline. A desulfurization wastewater pressure control valve 22 and a desulfurization wastewater flow valve 23 are installed on the connecting pipeline between the desulfurization wastewater drive pump 21 and the desulfurization wastewater ejector 24. The pressure of the desulfurization wastewater delivered to the ejector 24 can be easily adjusted via the pressure control valve 22, and the flow rate of the desulfurization wastewater delivered to the ejector 24 can be adjusted via the flow valve 23. Through the combined adjustment of the pressure control valve 22 and the flow valve 23, the droplet size and flow rate of the desulfurization wastewater sprayed onto different positions on the shut-off valve 52 can be controlled, thereby fully utilizing the sensible heat in the slag at different positions on the shut-off valve 52 and improving the treatment capacity and efficiency of the desulfurization wastewater.

[0052] A rotary nozzle 25 is provided on the desulfurization wastewater ejector 24, and the structure of the rotary nozzle 25 is as follows: Figure 3As shown, an eccentric cavity 251 is provided inside the rotating nozzle. Under a certain pressure, the desulfurization wastewater quickly passes through the eccentric cavity 251 and forms a rotating spray. It is then spirally ejected from the outlet of the rotating nozzle 25, which increases the contact area between the desulfurization wastewater droplets and the high-temperature gas in the slag hopper 51, thereby improving the heat absorption and evaporation effect of the desulfurization wastewater droplets.

[0053] In a preferred embodiment of the desulfurization wastewater treatment equipment in the furnace bottom slag hopper of this application, such as Figure 1 and Figure 4 As shown, the desulfurization wastewater ejector 24 uses a slag hopper spray gun. A desulfurization wastewater injection hole 511 is provided on the upper side wall of the slag hopper 51. A sliding mounting bracket 515 is fixedly installed on the outer side of the slag hopper 51 side wall surrounding the desulfurization wastewater injection hole 511. An injection hole cover plate 512 is slidably installed on the inner side of the sliding mounting bracket 515. A spherical gun head rotation hole 514 is provided on the injection hole cover plate 512. When the injection hole cover plate 512 slides to one end of the sliding mounting bracket 515, it can close the desulfurization wastewater injection hole 511; when the injection hole cover plate 512 slides to the other end of the sliding mounting bracket 515, the gun head rotation hole 514 is positioned opposite to the desulfurization wastewater injection hole 511, allowing the slag hopper spray gun to be inserted into the slag hopper 51 from the outside.

[0054] The cylinder body of the cover plate cylinder 513 can be directly fixed to the side wall of the slag hopper 51, or it can be fixed to the side wall of the slag hopper 51 via the sliding mounting bracket 515. The piston rod of the cover plate cylinder 513 passes through the sliding mounting bracket 515 and is connected to the injection hole cover plate 512. The cover plate cylinder 513 can drive the injection hole cover plate 512 to slide within the sliding mounting bracket 515, so that the injection hole cover plate 512 is in a closed state for the desulfurization wastewater injection hole 511, or in a state where the nozzle rotation hole 514 is opposite to the desulfurization wastewater injection hole 511.

[0055] The slag hopper spray gun includes a spray gun base 241, a multi-dimensional motion arm 242, and a spray gun head 243. The spray gun base 241 is fixed to the ground or a mounting frame on the outside of the slag hopper 51. One end of the multi-dimensional motion arm 242 is fixed to the spray gun base 241, and the spray gun head 243 is fixed to the other end of the multi-dimensional motion arm 242. The multi-dimensional motion arm 242 has several rotating connectors, each of which can rotate under the drive of a drive device, allowing the spray gun head 243 to move in any direction and rotate at any angle in three-dimensional space.

[0056] The spray nozzle 243 is connected to the desulfurization wastewater drive pump 21 via a pipeline. A rotating nozzle 25 is located at the end of the spray nozzle 243. The desulfurization wastewater drive pump 21 drives the desulfurization wastewater into the spray nozzle 243, which then sprays it out through the rotating nozzle 25 at its end. A spherical support 244, adapted to the nozzle head rotation hole 514, is located near the end of the multi-dimensional motion arm 242 adjacent to the spray nozzle 243. The multi-dimensional motion arm 242 moves under the control of the controller 6, inserting the end of the spray nozzle 243 through the nozzle head rotation hole 514 and the desulfurization wastewater injection hole 511 into the slag hopper 51. The spherical support 244 is supported within the nozzle head rotation hole 514, and its rotation within the hole changes the spray direction of the rotating nozzle 25. Simultaneously, the cooperation between the spherical support 244 and the nozzle head rotation hole 514 also seals the desulfurization wastewater injection hole 511, reducing heat dissipation within the slag hopper 51.

[0057] The slag monitoring device 1 monitors the accumulation and temperature of slag on the shut-off gate 52 in real time. When the amount of newly accumulated slag on the shut-off gate 52 reaches a certain level and the slag temperature also reaches a set level, the controller 6 sends a control signal to control the cover cylinder 513 to move, driving the spray hole cover 512 to slide to the position where the nozzle rotation hole 514 is opposite to the desulfurization wastewater spray hole 511. Then, the controller 6 sends a control signal to control the multi-dimensional motion arm 242 to move, so that the end of the spray gun head 243 passes through the nozzle rotation hole 514 and the desulfurization wastewater spray hole 511 and inserts into the slag hopper 51. The controller also controls the spray gun head 243 to rotate so that the rotating nozzle 25 points to the area on the shut-off gate 52 with a large amount of newly accumulated slag and a high slag temperature. The controller also adjusts the pointing position of the rotating nozzle 25 in real time according to the distribution and temperature of the slag, so that the rotating nozzle 25 always points to the area with a large amount of slag and a high slag temperature. At the same time, the controller 6 sends a control signal to adjust the desulfurization wastewater pressure control valve 22 and the desulfurization wastewater flow valve 23, so that the diameter of the desulfurization wastewater droplets and the desulfurization wastewater spray flow rate of the rotary nozzle 25 are adapted to the sensible heat contained in the slag in the corresponding area.

[0058] When the slag monitoring device 1 detects that the amount of high-temperature slag in all areas of the shut-off gate 52 and the slag temperature have decreased to the set level, the controller 6 sends a control signal to stop the supply of desulfurization wastewater and controls the multi-dimensional motion arm 242 to pull the spray gun head 243 out of the slag hopper 51. The control cover cylinder 513 drives the spray hole cover plate 512 to close the desulfurization wastewater spray hole 511. This causes the slag hopper spray gun to intermittently spray desulfurization wastewater into the slag hopper 51 according to the monitoring results of the slag monitoring device 1, using the sensible heat in the slag on the shut-off gate 52 to treat the desulfurization wastewater.

[0059] In another preferred embodiment of the desulfurization wastewater treatment equipment in the slag hopper of this application, the desulfurization wastewater injector consists of multiple fixed nozzles, with a rotating nozzle 25 fixed to the end of each fixed nozzle. The multiple fixed nozzles are fixedly mounted on the side wall of the slag hopper 51, specifically either integrally fixed to the inside of the slag hopper 51 or fixed to the slag hopper 51 through the side wall, so that the rotating nozzle 25 is located inside the slag hopper 51. The rotating nozzles 25 on the multiple fixed nozzles point to different areas on the shut-off gate 52, and the spray area of ​​the multiple rotating nozzles 25 covers the entire upper surface of the shut-off gate 52.

[0060] Each fixed nozzle is connected to a desulfurization wastewater drive pump 21 via a pipeline. The desulfurization wastewater output from the desulfurization wastewater drive pump 21 can be transported to each fixed nozzle through the pipeline. Each fixed nozzle is equipped with a nozzle switching valve 245 and a nozzle flow valve 246 on its desulfurization wastewater supply pipeline. Controlling the on / off state of different nozzle switching valves 245 can control the spraying of desulfurization wastewater by the rotating nozzles 25 on different fixed nozzles, so that the desulfurization wastewater is sprayed towards different areas on the shut-off gate 52. Controlling the flow rate of different nozzle flow valves 246 can control the flow rate of desulfurization wastewater sprayed towards different areas on the shut-off gate 52. Each nozzle switching valve 245 and each nozzle flow valve 246 are connected to the controller 6. The controller 6 can control the opening and closing of the nozzle switching valve 245 and the flow rate of the nozzle flow valve 246 on different fixed spray pipes in real time according to the distribution of slag on the shut-off gate 52 and the temperature of slag in different areas monitored in real time by the slag monitoring device 1. This allows the desulfurization wastewater to be sprayed towards the slag distribution area on the shut-off gate 52, and the flow rate of desulfurization wastewater sprayed in areas with higher slag temperature is greater.

[0061] The desulfurization wastewater ejector 24 can also be connected to an external miscellaneous air source via an air supply line. An air supply valve is installed on the air supply line of each desulfurization wastewater ejector 24. After the desulfurization wastewater treatment is completed, the air supply valve can be opened to allow airflow into the desulfurization wastewater ejector 24 to dry the wastewater, preventing residual wastewater from causing corrosion.

[0062] In some embodiments of the desulfurization wastewater treatment equipment in the furnace bottom slag hopper of this application, such as Figure 1 and Figure 2As shown, the counter-current circulation device 3 includes a burnout blower 31 and an air cap 32. The burnout blower 31 is located outside the slag hopper 51, and the air cap 32 covers the inner side of the shut-off door 52. The top of the air cap 32 is closed, and several air cap holes 321 are provided on the side wall. The air cap holes 321 are fixed to the shut-off door 52 in close contact with the upper surface of the shut-off door 52. An air hole penetrating the shut-off door 52 is provided below the air cap 32. The air outlet of the burnout blower 31 is connected to the air hole below the air cap 32 through a pipe. The burnout blower 31 can drive external gas into the air cap 32 and blow it out through the air cap holes 321 on the side wall of the air cap 32.

[0063] The airflow from the vent cap 32 blows towards the slag on the shut-off door 52, exchanging heat with the high-temperature slag. The heat from the slag heats the airflow into hot air, fully utilizing the heat in the bottom slag. The heated hot air moves upwards towards the slag hopper 51 and eventually enters the coal-fired furnace through the slag well 5. The rising hot air in the slag hopper 51 forms a countercurrent with the desulfurization wastewater droplets sprayed from above the slag hopper 51 towards the shut-off door 52. This allows the descending droplets to have sufficient contact with the rising hot air for a longer period, utilizing the heat in the hot air to rapidly evaporate the desulfurization wastewater droplets, improving the treatment efficiency. The hot air also drives some droplets upwards, creating a countercurrent with the falling slag in the slag well 5. The heat from the falling slag heats the desulfurization wastewater droplets, further improving the evaporation efficiency of the desulfurization wastewater droplets.

[0064] The setting of the air cap hole 321 on the side wall of the air cap 32 can prevent large pieces of slag from falling and clogging the air cap hole 321. On the other hand, it allows the airflow blown out through the air cap hole 321 to blow laterally along the surface of the shut-off door 52, blowing more towards the slag on the shut-off door 52, thereby making full use of the sensible heat in the bottom slag.

[0065] In a preferred embodiment of the desulfurization wastewater treatment equipment in the furnace bottom slag hopper of this application, such as Figure 5 As shown, multiple air caps 32 are fixedly installed on the shut-off door 52. The multiple air caps 32 are arranged in an array on the shut-off door 52 and are evenly distributed on the shut-off door 52. The array of multiple air caps 32 can effectively utilize the sensible heat in the slag at different positions on the shut-off door 52.

[0066] In some embodiments of the desulfurization wastewater treatment equipment in the furnace bottom slag hopper of this application, such as Figure 1 and Figure 2 As shown, the slag discharge device 4 includes a shut-off valve hydraulic cylinder 41 and a hydraulic reversing valve 42. The shut-off valve hydraulic cylinder 41 is located on the outer side of the bottom of the slag hopper 51. The cylinder body of the shut-off valve hydraulic cylinder 41 is rotatably connected to the slag hopper 51, and the piston rod is rotatably connected to the shut-off valve 52. By extending or retracting the piston rod of the shut-off valve hydraulic cylinder 41, the shut-off valve 52 can be driven to close or open.

[0067] The hydraulic directional valve 42 is connected between the shut-off valve hydraulic cylinder 41 and the hydraulic station. It controls whether the hydraulic oil from the hydraulic station is delivered to the shut-off valve hydraulic cylinder 41 and can control the direction of the hydraulic oil delivery to the shut-off valve hydraulic cylinder 41. The hydraulic directional valve 42 is connected to the controller 6. When the slag monitoring device 1 detects that the amount of slag accumulated on the shut-off valve 52 reaches the set value, the controller 6 sends a control signal to drive the hydraulic directional valve 42 to operate. This causes the hydraulic oil to enter from the rod chamber of the shut-off valve hydraulic cylinder 41 and return from the rodless chamber of the shut-off valve hydraulic cylinder 41. The piston rod of the shut-off valve hydraulic cylinder 41 retracts, driving the shut-off valve 52 to open and discharge the slag on the shut-off valve 52. After a short set time, once the slag on the shut-off gate 52 has fully dislodged, the controller 6 sends a control signal to drive the hydraulic reversing valve 42 to reverse its action, reversing the hydraulic oil supplied to the shut-off gate hydraulic cylinder 41. The piston rod of the shut-off gate hydraulic cylinder 41 extends, driving the shut-off gate 52 to close, reducing the heat dissipation in the slag hopper 51 and reducing the direct discharge of high-temperature slag.

[0068] One embodiment of the desulfurization wastewater treatment method of the furnace bottom slag hopper of this application uses the desulfurization wastewater treatment equipment of any embodiment of this application for desulfurization wastewater treatment, such as... Figure 6 As shown, it includes the following steps: S10: Obtain the slag distribution in different areas of the shut-off gate 52. Typically, a slag monitoring device 1 is installed on the slag hopper 51. The slag monitoring device 1 uses a transparent observation window on the slag hopper 51 to collect real-time images of the shut-off gate 52, and obtains the distribution of slag on the shut-off gate 52 and the amount of slag in different areas of the shut-off gate 52 from the images.

[0069] S20: Obtain the slag temperature in different areas of the shut-off gate 52. The slag temperature on the shut-off gate 52 is usually also obtained through the slag monitoring device 1. The slag monitoring device 1 may include an infrared camera, which can capture infrared images of the shut-off gate 52. By combining the infrared images with real-time images of the shut-off gate 52 acquired by other types of image acquisition devices, the slag temperature in different areas of the shut-off gate 52 can be easily obtained. Alternatively, the slag temperature in different areas of the shut-off gate 52 can also be indirectly determined by the brightness in the visible light image.

[0070] S30: The desulfurization wastewater is sprayed onto the slag distribution area on the shut-off gate 52, and the spray flow rate of the desulfurization wastewater in different areas is controlled so that the spray flow rate is positively correlated with the slag temperature. The desulfurization wastewater is sprayed onto the slag distribution area on the shut-off gate 52 through the desulfurization wastewater spraying device 2, so that the desulfurization wastewater forms water mist and falls onto the slag area on the shut-off gate 52. The sensible heat in the slag is used to heat the desulfurization wastewater, so that the water in the desulfurization wastewater evaporates to form water vapor, which is discharged with the flue gas of the coal-fired boiler; most of the non-volatile components such as salts in the desulfurization wastewater adhere to the slag and are discharged with the slag.

[0071] The desulfurization wastewater injection device 2 can inject desulfurization wastewater continuously or intermittently. During intermittent injection, the controller 6 initiates the injection of desulfurization wastewater when the slag monitoring device 1 detects a certain amount of newly added slag on the shut-off gate 52 and the slag temperature reaches a relatively high level. Conversely, the controller 6 stops the injection of desulfurization wastewater when the slag monitoring device 1 detects that the slag temperature on the shut-off gate 52 has decreased to a relatively low level.

[0072] S40: A set flow rate of air is introduced from the area of ​​the shut-off gate 52, forming hot air flowing towards the top of the slag hopper 51. Gas is introduced above the shut-off gate 52 through the counter-current circulation device 3, so that the gas flows out through the air cap hole 321 on the side wall of the air cap 32 on the shut-off gate 52 and blows towards the slag accumulated on the shut-off gate 52. The residual heat in the slag is used to heat the airflow, so that the airflow forms hot air flowing towards the top of the slag hopper 51. It forms a counter-current with the desulfurization wastewater droplets sprayed from the top of the slag hopper 51 towards the shut-off gate 52, so that the hot air and the desulfurization wastewater droplets come into full contact, and more water in the desulfurization wastewater absorbs heat and evaporates.

[0073] As the hot air flows upward, it can also carry some of the desulfurization wastewater droplets upward, forming a countercurrent with the slag falling in slag well 5. The high-temperature slag falling in the slag well can be used to heat the desulfurization wastewater, further improving the treatment effect of the desulfurization wastewater.

[0074] The counter-current circulation device 3 can also be connected to the flue of the power plant through the air duct, driving the flue gas with a temperature of over 300°C in the flue to be blown into the slag hopper 51 through the air cap 32, using the high temperature flue gas to evaporate the water in the desulfurization wastewater, thereby improving the evaporation effect of the water in the desulfurization wastewater.

[0075] S50: Obtain the amount of slag accumulated on the shut-off gate 52, and control the shut-off gate 52 to open when the accumulated amount exceeds a set value. The amount of slag accumulated on the shut-off gate 52 can also be obtained from the real-time image above the shut-off gate 52 collected by the slag monitoring device 1. When the amount of slag accumulated on the shut-off gate 52 reaches a set size, the controller 6 sends a control signal to control the slag discharge device 4 to operate, drive the shut-off gate 52 to open, and discharge the slag on the shut-off gate 52 from the bottom of the slag hopper 51.

[0076] A dry slag machine conveyor belt or a wet slag machine can be installed below the slag hopper 51 to further process the slag discharged from the slag hopper 51.

[0077] In the description of this application, the references to terms such as "an embodiment," "specific embodiment," and "preferred embodiment" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A desulfurization wastewater treatment device for furnace bottom slag hopper, characterized in that, The system includes a slag monitoring device (1), a desulfurization wastewater injection device (2), a counter-current circulation device (3), and a slag discharge device (4). The slag monitoring device (1) is installed on the wall of the slag well (5). The bottom of the slag well (5) is provided with multiple slag hoppers (51). The bottom of the slag hoppers (51) is provided with shut-off gates (52). The slag monitoring device (1) can detect the temperature and distribution of the slag on the shut-off gates (52). The desulfurization wastewater injection device (2) can spray desulfurization wastewater to different positions of the shut-off gates (52) according to the monitoring results of the slag monitoring device (1) and control the flow rate of the spray at different positions. The counter-current circulation device (3) can send air from the shut-off gates (52) and form a counter-current opposite to the direction of the desulfurization wastewater after being heated by the slag. The slag discharge device (4) is located at the bottom of the slag hoppers (51) and can control the opening and closing of the shut-off gates (52).

2. The desulfurization wastewater treatment equipment for the furnace bottom slag hopper according to claim 1, characterized in that, The slag monitoring device (1) includes a monitoring probe (11) and an image processing unit (12). The monitoring probe (11) includes at least two of the following: electromagnetic radar, lidar, dual-light camera, infrared camera, and visible light camera. The monitoring probe (11) is installed on the wall of the slag well (5) and faces the shut-off door (52). The image processing unit (12) is connected to the monitoring probe (11) and can process the images collected by the monitoring probe (11) to obtain the distribution information of slag on the shut-off door (52).

3. The desulfurization wastewater treatment equipment for the furnace bottom slag hopper according to claim 2, characterized in that, The slag monitoring device (1) includes at least one infrared camera or dual-light camera.

4. The desulfurization wastewater treatment equipment for the furnace bottom slag hopper according to claim 1, characterized in that, The desulfurization wastewater injection device (2) includes a desulfurization wastewater drive pump (21), a desulfurization wastewater pressure control valve (22), a desulfurization wastewater flow valve (23), and a desulfurization wastewater injector (24). The desulfurization wastewater drive pump (21) is connected to the desulfurization wastewater injector (24) through a pipeline. The desulfurization wastewater pressure control valve (22) and the desulfurization wastewater flow valve (23) are sequentially arranged on the connecting pipeline between the desulfurization wastewater drive pump (21) and the desulfurization wastewater injector (24). The desulfurization wastewater injector (24) is equipped with a rotating nozzle (25). The rotating nozzle (25) can form a rotating spray of desulfurization wastewater and spray it towards different areas on the shut-off gate (52).

5. The desulfurization wastewater treatment equipment for the furnace bottom slag hopper according to claim 4, characterized in that, The desulfurization wastewater ejector (24) is a slag hopper spray gun. The slag hopper (51) has desulfurization wastewater spray holes (511) on its side wall. The slag hopper (51) has a spray hole cover plate (512) and a cover plate cylinder (513) on its outer side wall. The cover plate cylinder (513) is fixed on the slag hopper (51), and the piston rod is connected to the spray hole cover plate (512). The spray hole cover plate (512) is equipped with a gun head rotation mechanism. The nozzle (514) and the nozzle cover (512) are slidably connected to the side wall of the slag hopper (51) and can slide under the drive of the cover cylinder (513), so that the nozzle cover (512) closes the desulfurization wastewater injection hole (511), or the nozzle rotation hole (514) corresponds to the desulfurization wastewater injection hole (511). The slag hopper spray gun includes a spray gun seat (241), a multi-dimensional motion arm (242) and a spray nozzle. The nozzle (243) is located on the outside of the slag hopper (51). The multi-dimensional motion arm (242) is fixed on the nozzle seat (241) and connected to the nozzle (243). The nozzle (243) is connected to the desulfurization wastewater drive pump (21) through a pipeline. The rotary nozzle (25) is located at the end of the nozzle (243). The nozzle (243) is provided with a spherical support (244) that is compatible with the nozzle rotation hole (514). The cover cylinder (513) can operate under the control of the monitoring results of the slag monitoring device (1). The slag hopper spray gun can insert the nozzle (243) through the nozzle rotation hole (514) into the desulfurization wastewater injection hole (511) under the control of the monitoring results of the slag monitoring device (1) and adjust the spray direction of the rotary nozzle (25).

6. The desulfurization wastewater treatment equipment for the furnace bottom slag hopper according to claim 4, characterized in that, The desulfurization wastewater ejector (24) consists of multiple fixed nozzles, with the rotary nozzle (25) located at the end of the fixed nozzle. The multiple fixed nozzles are located on the slag hopper (51), such that the rotary nozzle (25) is located inside the slag hopper (51), and each rotary nozzle (25) faces a different position on the shut-off gate (52). Each fixed nozzle is connected to the desulfurization wastewater drive pump (21) via a pipeline, and each fixed nozzle is equipped with a nozzle switching valve (245) and a nozzle flow valve (246) on its connecting pipeline. The nozzle switching valve (245) and the nozzle flow valve (246) can operate according to the monitoring results of the slag monitoring device (1).

7. The desulfurization wastewater treatment equipment for the furnace bottom slag hopper according to claim 1, characterized in that, The counter-current circulation device (3) includes a burnout blower (31) and a wind cap (32). The burnout blower (31) is connected to the wind cap (32). The wind cap (32) is fixed on the shut-off door (52). The top of the wind cap (32) is closed, and a wind cap hole (321) is provided on the side.

8. The desulfurization wastewater treatment equipment for the furnace bottom slag hopper according to claim 7, characterized in that, Multiple wind caps (32) are provided, and the multiple wind caps (32) are arranged in an array on the shut-off door (52).

9. The desulfurization wastewater treatment equipment for the furnace bottom slag hopper according to any one of claims 1-8, characterized in that, The slag discharge device (4) includes a shut-off hydraulic cylinder (41) and a hydraulic directional valve (42). The shut-off hydraulic cylinder (41) is located at the bottom of the slag hopper (51) and connected to the shut-off valve (52). The hydraulic directional valve (42) is connected between the shut-off hydraulic cylinder (41) and the external hydraulic circuit and can operate according to the monitoring results of the slag monitoring device (1).

10. A method for treating desulfurization wastewater from a furnace bottom slag hopper, characterized in that, The desulfurization wastewater treatment using the furnace bottom slag hopper desulfurization wastewater treatment equipment according to any one of claims 1-9 includes the following steps: S10: Obtain the slag distribution in different areas on the shut-off gate (52); S20: Obtain the slag temperature in different areas on the shut-off gate (52); S30: The desulfurization wastewater is sprayed onto the slag distribution area on the shut-off gate (52), and the spray flow rate of the desulfurization wastewater in different areas is controlled so that the spray flow rate is positively correlated with the slag temperature. S40: An airflow of a set flow rate is introduced from the area of ​​the shut-off door (52) to form hot air flowing toward the top of the slag hopper (51); S50: Obtain the amount of slag accumulation on the shut-off door (52), and control the shut-off door (52) to open when the accumulation amount is greater than the set value.

Images