Desulfurization wastewater evaporation device

Abstract

The utility model relates to wastewater evaporation technical field discloses a kind of desulfurization wastewater evaporation devices, including evaporation tank body and wastewater tank, the inside of evaporation tank body is equipped with deflector, heating plate is embedded in the bottom end of deflector, multiple groups of shunt grooves are opened in deflector, lug is embedded in shunt groove upper end, the outer end of bidirectional screw rod one is fixed with main transmission wheel, movable plate is installed on bidirectional screw rod one by thread, elastic column is fixed between lug top and toothed plate, coil pipe is installed in interlayer, the utility model passes through heating plate closely adheres deflector and transfers heat, ensure that it is evenly endothermic evaporation, while the inclination angle of deflector is with gravity, guide salt residue produced after evaporation to converge in tank bottom middle part, drive the toothed plate on other two groups of screw rod to move along corresponding limit rod, under the action of elastic column, each group of lug can be full range closely adhere tank wall sliding, automatically scrape off residual salt residue in tank and push it into lower discharge pipe, improve desulfurization wastewater treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater evaporation technology, and in particular to a desulfurization wastewater evaporation device. Background Technology

[0002] Desulfurization wastewater refers to the wastewater generated during the operation of flue gas desulfurization systems in thermal power plants. It is primarily used to control the concentration of chloride ions and the purity of gypsum in the control system. Its generation includes gypsum dewatering and cleaning of the slurry circulation system. Desulfurization wastewater contains heavy metals (such as mercury and cadmium), suspended solids (gypsum particles, fly ash), high salinity (chloride ions, sulfate ions), and weakly acidic substances (pH 4-6). The water temperature is typically between 40℃ and 60℃. An existing desulfurization wastewater evaporation device (publication number: CN220926336U) uses a heat exchanger to exchange heat between steam and wastewater, preheating the wastewater and improving energy utilization efficiency. The design of multiple inclined and staggered heating plates and absorbent cloth increases the heating area. However, relying on the wastewater flowing downstream and passing through all heating plates sequentially, if the water flow speed is too fast, the absorbent cloth cannot absorb the wastewater in time, causing the wastewater to drip directly to the bottom of the evaporation tank. This insufficiently heated wastewater remains at the bottom of the tank, thereby reducing the overall evaporation efficiency. Furthermore, residue remains on the absorbent cloth, requiring the device to be stopped when replacing the absorbent cloth, directly causing the desulfurization wastewater treatment to be interrupted and preventing continuous operation. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a desulfurization wastewater evaporation device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A desulfurization wastewater evaporation device includes an evaporation tank and a wastewater tank. The evaporation tank has a guide plate inside, with a heating plate embedded at the bottom of the guide plate. Multiple diversion channels are formed on the guide plate, and protrusions are embedded at the upper ends of the diversion channels. A bidirectional lead screw is provided above the guide plate, with a limiting rod on one side of the bidirectional lead screw. A main drive wheel is fixed to the outer end of the bidirectional lead screw. A movable plate is threaded onto the bidirectional lead screw and passes through the limiting rod. A toothed plate is fixed on the movable plate, and an elastic column is fixed between the top of the protrusion and the toothed plate. A jacket is formed inside the wastewater tank, and a coil is installed inside the jacket.

[0005] As a further embodiment of this utility model, a bidirectional lead screw three is provided above the bidirectional lead screw one, and a bidirectional lead screw two is provided between the bidirectional lead screw three and the bidirectional lead screw one. A motor is installed on the side of the evaporator body near the main drive wheel by fasteners, and the guide plates are distributed at equal intervals inside the evaporator body.

[0006] As a further embodiment of this utility model, the motor is fixedly connected to the main drive wheel via the output shaft, the outer end of the double-acting lead screw two is fixedly fitted with the driven drive wheel one, and the outer end of the double-acting lead screw three is fixedly fitted with the driven drive wheel two.

[0007] As a further embodiment of this utility model, the second drive wheel and the first drive wheel are connected to the main drive wheel via a belt.

[0008] As a further embodiment of this utility model, a perforated spray plate is installed at the upper end of the evaporator body, and an exhaust pipe is fixed between the side wall of the evaporator body and the coil, and the exhaust pipe passes through the side wall of the wastewater tank.

[0009] As a further embodiment of this utility model, an exhaust valve is fixed on the exhaust pipe, an inlet pipe is fixed on the top of the wastewater tank, a condensate drain pipe is fixed on the bottom of the coil, a slag discharge pipe is fixed on the bottom of the evaporator, and a valve is fixedly installed on the slag discharge pipe.

[0010] As a further embodiment of this utility model, a water supply pipe is fixed between the top of the multi-hole spray plate and the wastewater tank, and a water pump is fixedly installed on the water supply pipe.

[0011] Compared with the prior art, the present invention has the following beneficial effects: After the water pump sends the preheated desulfurization wastewater into the evaporator, it is evenly dispersed by the top multi-hole spray plate and sprayed out. The water flow is then precisely guided by the toothed plate to the diversion tank below. The heating plate closely adheres to the guide plate to transfer heat, thereby extending the contact time between the desulfurization wastewater and the heat source and ensuring its uniform heat absorption and evaporation. At the same time, the inclined angle of the guide plate, with the help of gravity, guides the salt residue generated after evaporation to converge towards the middle of the tank bottom. In addition, the main drive wheel at one end of the bidirectional screw drives two driven wheels to rotate synchronously through a closed-loop synchronous belt, which in turn drives the toothed plates on the other two sets of screws to move along the corresponding limit rods. Under the action of the elastic column, each set of protrusions can slide closely against the tank wall throughout the process, automatically scraping off the residual salt residue in the tank and pushing it into the slag discharge pipe below. This prevents the salt residue from adhering to the tank wall and affecting the heat transfer efficiency, so that the uniform heating of the desulfurization wastewater and the automatic cleaning of the salt residue are completed simultaneously, improving the treatment efficiency of the desulfurization wastewater. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of a desulfurization wastewater evaporation device proposed in this utility model; Figure 2 This is a cross-sectional structural diagram of a desulfurization wastewater evaporation device proposed in this utility model; Figure 3 for Figure 2 Enlarged diagram of point A in the diagram; Figure 4This is a schematic diagram of the guide plate, bidirectional lead screw, and limiting rod structure of a desulfurization wastewater evaporation device proposed in this utility model; Figure 5 This is a schematic diagram of the wastewater tank structure of a desulfurization wastewater evaporation device proposed in this utility model.

[0013] In the diagram: 1. Evaporator body; 101. Main drive wheel; 102. Driven wheel one; 103. Driven wheel two; 104. Belt; 105. Motor; 106. Water supply pipe; 2. Wastewater tank; 201. Inlet pipe; 202. Exhaust pipe; 203. Coil; 204. Jacket; 205. Exhaust valve; 206. Condensate drain pipe; 3. Guide plate; 301. Diversion channel; 302. Heating plate; 303. Elastic column; 304. Protrusion; 4. Movable plate; 401. Double-acting screw one; 402. Toothed plate; 403. Limiting rod; 404. Double-acting screw two; 405. Double-acting screw three; 5. Multi-hole spray plate; 6. Slag discharge pipe; 601. Valve; 7. Water pump. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] Reference Figures 1-5An evaporation device for desulfurization wastewater includes an evaporation tank 1 and a wastewater tank 2. The evaporation tank 1 is provided with a guide plate 3 inside. A heating plate 302 is embedded at the bottom of the guide plate 3. Multiple diversion channels 301 are opened on the guide plate 3. A protrusion 304 is embedded at the upper end of the diversion channel 301. A bidirectional lead screw 401 is provided above the guide plate 3. A limiting rod 403 is provided on one side of the bidirectional lead screw 401. A main drive wheel 101 is fixed at the outer end of the bidirectional lead screw 401. A movable plate 4 is threadedly installed on the bidirectional lead screw 401 and passes through the limiting rod 403. A toothed plate 402 is fixed on the movable plate 4. An elastic column 303 is fixed between the top of the protrusion 304 and the toothed plate 402. A jacket 204 is opened inside the wastewater tank 2. A coil 203 is installed in the jacket 204.

[0018] The water pump 7 is started, and the preheated desulfurization wastewater is sent into the evaporator tank 1 through the water pipe 106. The wastewater first reaches the perforated spray plate 5 at the top of the evaporator tank 1, and is evenly dispersed by the perforated spray plate 5 before being sprayed out. The sprayed water falls downward onto the toothed plate 402, and is guided by the toothed plate 402 to flow precisely into the diversion groove 301 opened on the surface of the guide plate 3 below. At this time, the heating plate 302 starts to work, and the heating plate 302 closely adheres to the guide plate 3 to transfer heat, so that the desulfurization wastewater in the diversion groove 301 continuously absorbs heat and gradually evaporates. At the same time, the guide plate 3 is inclined at a certain angle to the horizontal plane, which helps to... Gravity guides the salt residue produced after evaporation to converge at the bottom center of the diversion tank 301. When it is necessary to clean the residue, the motor 105 starts, driving the main drive wheel 101 at the end of the bidirectional lead screw 401 to rotate. The main drive wheel 101 is linked to the driven drive wheel 102 and driven drive wheel 103 through the closed-loop synchronous belt 104, thereby causing the three sets of bidirectional lead screws to rotate synchronously. Meanwhile, each set of movable plates 4 moves smoothly along the corresponding limit rod 403. Under the micro-compression of the elastic column 303, the protrusion 304 slides tightly against the wall of the diversion tank 301 throughout the entire process, automatically scraping off the salt residue remaining in the tank.

[0019] In this embodiment, a bidirectional lead screw 405 is provided above the bidirectional lead screw 1 401, and a bidirectional lead screw 404 is provided between the bidirectional lead screw 3 405 and the bidirectional lead screw 1 401. A motor 105 is installed on the side of the evaporator tank 1 near the main drive wheel 101 by fasteners. The guide plates 3 are evenly distributed inside the evaporator tank 1.

[0020] The heating plate 302 is made of porous ceramic material, which has good high temperature resistance, corrosion resistance, resistance to acid and alkali erosion of desulfurization wastewater and heat conduction efficiency, and can closely fit the guide plate 3 to stably transfer heat.

[0021] In this embodiment, the motor 105 is fixedly connected to the main drive wheel 101 through the output shaft, the outer end of the bidirectional lead screw 404 is fixed with the driven drive wheel 102, and the outer end of the bidirectional lead screw 405 is fixedly installed with the driven drive wheel 103.

[0022] The surfaces of the two-way lead screw 1 (401), two-way lead screw 2 (404), and three-way lead screw 3 (405) are all coated with anti-corrosion coatings, which have the protective properties against acid and alkali corrosion from desulfurization wastewater, reducing corrosion damage when in contact with wastewater and ensuring transmission stability.

[0023] In this embodiment, the second drive wheel 103 and the first drive wheel 102 are connected to the main drive wheel 101 via a belt 104.

[0024] The toothed plate 402 can accurately guide the desulfurization wastewater sprayed from the porous spray plate 5 to the cooperative diversion tank 301. On the other hand, it can move with the movable plate 4 and work with the elastic column 303 and the protrusion 304 to assist the salt residue in the diversion tank 301.

[0025] In this embodiment, a perforated spray plate 5 is installed at the upper end of the evaporator tank 1, and an exhaust pipe 202 is fixed between the side wall of the evaporator tank 1 and the coil 203, and the exhaust pipe 202 passes through the side wall of the wastewater tank 2.

[0026] The elastic column 303 ensures that the protrusion 304 is in close contact with the diversion channel 301 throughout the process through micro-compression deformation. When the protrusion 304 moves with the movable plate 4, it can automatically scrape off the residual salt impurities in the channel and push the impurities to the slag collection area in the middle of the evaporator 1, so as to avoid the impurities adhering to the channel wall and affecting the heat transfer and slag removal effect.

[0027] In this embodiment, an exhaust valve 205 is fixed on the exhaust pipe 202, an inlet pipe 201 is fixed on the top of the wastewater tank 2, a condensate drain pipe 206 is fixed at the bottom of the coil 203, a slag discharge pipe 6 is fixed at the bottom of the evaporator body 1, and a valve 601 is fixedly installed on the slag discharge pipe 6.

[0028] The three sets of screws, namely, the first set 401, the second set 404, and the third set 405, are equipped with symmetrically distributed movable plates 4, which move smoothly under the limiting action of the limiting rod 403, and cooperate to complete the wastewater guiding and residue cleaning work.

[0029] In this embodiment, a water supply pipe 106 is fixed between the top of the perforated spray plate 5 and the wastewater tank 2, and a water pump 7 is fixedly installed on the water supply pipe 106.

[0030] By introducing high-temperature steam generated in the evaporator tank 1 into the coil 203, the steam releases heat inside the coil, preheating the desulfurization wastewater to be treated in the wastewater tank 2, thereby reducing energy consumption for subsequent evaporation processes.

[0031] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: First, the desulfurization wastewater to be treated enters the wastewater tank 2 for preheating through the inlet pipe 201. The high-temperature steam generated by the previous operation of the evaporator tank 1 is introduced into the coil 203 in the jacket 204 through the exhaust pipe 202. The steam releases heat in the coil 203 to preheat the wastewater. The condensate formed after heat exchange is discharged from the condensate drain pipe 206. After preheating, the water pump 7 is started, and the preheated desulfurization wastewater is sent into the evaporator tank 1 through the water supply pipe 106. The wastewater first reaches the perforated spray plate 5 at the top of the evaporator tank 1. After being evenly dispersed by the perforated spray plate 5, it is sprayed out. The sprayed water flows down onto the toothed plate 402. Through the guiding action of the toothed plate 402, it flows precisely into the diversion groove 301 opened on the surface of the guide plate 3 below. At this time, the heating plate 302 starts to work and heats the wastewater. Plate 302 is in close contact with guide plate 3 to transfer heat, so that the desulfurization wastewater in the diversion tank 301 continuously absorbs heat and gradually evaporates. At the same time, guide plate 3 is at a certain angle to the horizontal plane, and with the help of gravity, the salt residue generated after evaporation is guided to converge to the bottom center of the diversion tank 301. When it is necessary to clean the residue, motor 105 starts, driving the main drive wheel 101 at the end of the bidirectional lead screw 401 to rotate. The main drive wheel 101 is linked to the driven wheel 102 and driven wheel 2 103 through the closed-loop synchronous belt 104, so that the three sets of bidirectional lead screws rotate synchronously. Each set of movable plates 4 moves smoothly along the corresponding limit rod 403. The protrusion 304 slides in close contact with the wall of the diversion tank 301 throughout the process under the micro-compression of the elastic column 303, automatically scraping off the salt residue remaining in the tank and pushing the residue downward. Finally, valve 601 is opened so that the residue can be discharged through slag discharge pipe 6.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A desulfurization wastewater evaporation device, comprising an evaporation tank (1) and a wastewater tank (2), characterized in that: The evaporator body (1) is equipped with a guide plate (3) inside. A heating plate (302) is embedded at the bottom of the guide plate (3). Multiple flow channels (301) are opened on the guide plate (3). A protrusion (304) is embedded at the upper end of the flow channel (301). A bidirectional lead screw (401) is provided above the guide plate (3). A limiting rod (403) is provided on one side of the bidirectional lead screw (401). A fixed end is fixed to the outer end of the bidirectional lead screw (401). The main drive wheel (101) has a movable plate (4) threadedly installed on the double-acting screw (401), and the movable plate (4) passes through the limiting rod (403). A toothed plate (402) is fixed on the movable plate (4). An elastic column (303) is fixed between the top of the protrusion (304) and the toothed plate (402). A jacket (204) is provided inside the wastewater tank (2), and a coil (203) is installed inside the jacket (204).

2. The desulfurization wastewater evaporation device according to claim 1, characterized in that, A bidirectional lead screw three (405) is provided above the bidirectional lead screw one (401), and a bidirectional lead screw two (404) is provided between the bidirectional lead screw three (405) and the bidirectional lead screw one (401). A motor (105) is installed on the side of the evaporator body (1) near the main drive wheel (101) by fasteners. The guide plates (3) are evenly distributed inside the evaporator body (1).

3. The desulfurization wastewater evaporation device according to claim 2, characterized in that, The motor (105) is fixedly connected to the main drive wheel (101) via the output shaft. The outer end of the two-way lead screw (404) is fixed with the driven drive wheel (102). The outer end of the two-way lead screw (405) is fixedly installed with the driven drive wheel (103).

4. The desulfurization wastewater evaporation device according to claim 3, characterized in that, The second drive wheel (103) and the first drive wheel (102) are connected to the main drive wheel (101) via a belt (104).

5. The desulfurization wastewater evaporation device according to claim 1, characterized in that, The upper part of the evaporator tank (1) is equipped with a perforated water spray plate (5). An exhaust pipe (202) is fixed between the side wall of the evaporator tank (1) and the coil (203), and the exhaust pipe (202) passes through the side wall of the wastewater tank (2).

6. The desulfurization wastewater evaporation device according to claim 5, characterized in that, An exhaust valve (205) is fixed on the exhaust pipe (202), an inlet pipe (201) is fixed on the top of the wastewater tank (2), a condensate drain pipe (206) is fixed on the bottom of the coil (203), a slag discharge pipe (6) is fixed on the bottom of the evaporator (1), and a valve (601) is fixed on the slag discharge pipe (6).

7. The desulfurization wastewater evaporation device according to claim 5, characterized in that, A water supply pipe (106) is fixed between the top of the perforated spray plate (5) and the wastewater tank (2), and a water pump (7) is fixedly installed on the water supply pipe (106).

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