Thermal power plant sewage recycling system and treatment process thereof

Abstract

The invention discloses a thermal power plant sewage recycling system and a treatment process thereof. The system comprises a transmission mechanism, a filtering mechanism, a stirring mechanism, a heating pipe, a gas collecting hood, a sweeping mechanism and a solid collecting box, the transmission mechanism adopts a double-power structure, sewage flow is used for generating power for the mechanism, and a motor is arranged for switching the motor to generate power when the water flow is weak; the filtering mechanism reciprocates to scrape and sweep solid impurities on the filtering plate; the neutralizing agent and the flocculating agent can be better mixed with the sewage through the stirring mechanism; the treatment process comprises the following steps. S1; large-particle suspended solids in the sewage are filtered through the filtering mechanism; s2, adding a neutralizer into the sewage to neutralize the pH value, and stirring; s3, carrying out evaporation treatment on the sewage through a heating pipe; s4, collecting condensate water and separated crystals after evaporation; (S6); and adding a coagulant and a flocculating agent into the sewage, and removing precipitates and flocculates in the liquid to finish the treatment.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sewage recycling system for a thermal power plant and a treatment process thereof. Background Art

[0002] The recycling of wastewater from thermal power plants is an important part of achieving water conservation, emission reduction and resource recycling in power plants. The impurities in wastewater from thermal power plants mainly come from multiple links such as fuel combustion, water treatment process and equipment operation. The main impurities are suspended matter, soluble salts, heavy metal ions and acidic and alkaline substances. The suspended matter mainly includes coal powder, ash and solid impurities generated during water heating. Soluble salts such as sodium chloride and sodium sulfate originate from the decomposition and dissolution of minerals in the fuel during combustion, producing salts that are easily soluble in water. Heavy metal ions such as lead, cadmium, mercury and chromium originate from the transformation and release of heavy metal elements in the fuel during combustion, causing the pH value of the solution to change, making the water body acidic or alkaline. According to the Pollutant Emission Standard for Thermal Power Plants (GB 13223-2011), the pH value of wastewater needs to be maintained within the range of 6-9, suspended matter ≤50 mg / L, sulfide ≤1 mg / L, and total dissolved solids ≤2000 mg / L.

[0003] After searching, the prior art authorization publication number CN117383630A is a thermal power plant sewage treatment device, including a sewage treatment box, two symmetrical decontamination plates are arranged inside the sewage treatment box, both ends of the decontamination plates are fixedly connected with a rotating shaft, one end of the rotating shaft close to the decontamination plate is rotatably connected with a sliding block, and both sides of the treatment box are provided with sliding grooves for the sliding block to slide up and down; a first gear is fixedly connected to the middle of the rotating shaft; a first rack for driving the first gear to rotate ninety degrees is arranged on the side of the first gear, and the first rack is fixedly connected to the side of the treatment box, driving mechanisms are arranged on both sides of the decontamination plate, and a storage mechanism is arranged on the side of the treatment box; the device filters the solid impurities insoluble in water in the sewage through the decontamination plates, and cannot remove other impurities soluble in water, and cannot neutralize the pH value of the sewage.

[0004] After searching, the prior art authorization announcement number CN220034066U is a power plant sewage treatment device, including a first box body, a second box body is fixedly connected to the surface of the first box body, a through hole is opened on the surface of the second box body, a movable plate is arranged in the through hole, a filter box is fixedly connected to the surface of the movable plate, a groove is opened on the inner wall of the through hole, and by setting a first rotating shaft and a threaded column, when the filter box is moved, it is only necessary to rotate the turntable through an external tool to drive the first rotating shaft to rotate, and then drive the threaded column to rotate, under the joint action of the threaded column and the threaded tube, the clamping rod is driven to move, and then the clamping rod is separated from the clamping groove, the movable plate is moved, and then the filter box is moved out of the second box body, and the dirt in the filter box is cleaned; after filtering the sewage, the device adds chemicals to treat the sewage, there is no subsequent treatment process, and the sewage cannot be recycled. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a wastewater recycling system for a thermal power plant and a treatment process thereof. The transmission mechanism adopts a dual-power structure, utilizes the wastewater flow to generate power for the mechanism, and is provided with a motor to switch the motor to generate power when the water flow is weak; the filtering mechanism performs reciprocating motion to scrape and clean the solid impurities on the filter plate; the stirring mechanism enables the neutralizer and flocculant to be better mixed with the wastewater; the wastewater is heated by a heating pipe, and the generated water vapor rises through a gas collecting hood, and then forms condensed water through a cooling pipe for collection, and the solid flocculants generated after evaporation and the precipitated salt are sent out of the device box by a conveyor belt; the cleaning mechanism cleans the precipitated solid impurities on the conveyor belt to the solid collection box below.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A thermal power plant wastewater recycling system and treatment process thereof, the specific method and steps are as follows:

[0008] 1) Filtration: The sewage passes through the filter plate, which is set to 5-20mm, to filter out large suspended particles in the sewage, and control the sewage flow rate to 0.6-1.0 m / s. The impurities in the sewage pass through the filtering mechanism, and the inclined scraper and brush plate scrape the filter plate to clean and scrape the solid impurities on the filter plate to the sewage pipe area on both sides, and then the sludge pump is used to extract the device;

[0009] 2) PH neutralization: Add quicklime or slaked lime to the sewage from the feed port to neutralize the sewage. The purity of lime is usually 85%-95%. According to the different PH values ​​of the wastewater, the amount of quicklime added is 134-164 mg / L, and the amount of slaked lime added is 177-217 mg / L. The reaction time of lime and acidic substances is 10-30 minutes. The stirring mechanism rotates and stirs while performing reciprocating motion. The stirring rate is 150-300 rpm. During the stirring process, irregular mixed flow is generated between the stirring blades, so that the neutralizer is better mixed with the sewage and the reaction rate is accelerated.

[0010] 3) Evaporation: Heat the heating tube to 105-150°C to heat the sewage in the box. The operating pressure of atmospheric evaporation is 101.3 kPa, and the amount of water evaporated per unit time is 10-100 m³ / h. The sewage flow entering the evaporation container is controlled to be less than 100 m³ / h, and the generated water vapor rises through the gas collecting hood;

[0011] 4) Condensation: The water vapor in the gas collecting hood is cooled by a cooling pipe. Cooling water is provided outside the cooling pipe to ensure that the cooling water temperature is 20-35°C. The condensing water temperature is 5-10°C higher than the cooling water. The condensing water flow rate is 10-50 m³ / h.

[0012] 5) Crystallization: After evaporation, the salt in the water body crystallizes and precipitates, the crystallization temperature is 30-50°C, the crystallized salt components are Na2SO4 and NaCl, the crystallization rate is 0.1-1.0 kg / (m³·h), the moisture content of the finished product is less than 1%, and it is sent out of the device box via the conveyor belt. The upper and lower groups of wiping rollers of the cleaning mechanism are close to the surface of the conveyor belt. Motor IV controls the wiping rollers to rotate and wipe and clean the conveyor belt. The solid crystals swept down enter the solid collection box under the conveyor belt;

[0013] 6) Flocculation and sedimentation: After the sewage is treated in the above steps, coagulants and flocculants are added to the sewage. Ferric chloride is used as the coagulant at a dosage of 40-120 mg / L, and polyacrylamide is used as the flocculant at a dosage of 0.2-0.5 mg / L. The wastewater is stirred at a speed of 125-160 rpm for 15-20 minutes. After removing the precipitation and flocculation in the liquid, the remaining liquid is tested to complete the sewage treatment.

[0014] A wastewater recycling system for a thermal power plant comprises a transmission mechanism, a filtering mechanism, a stirring mechanism, a feed port, a sludge pump, a heating pipe, an air collecting hood, a cooling pipe, a conveyor belt, a cleaning mechanism, a supporting rotating arm, a solid collecting box, a water inlet pipe, a box body, a connecting valve, a conveyor belt positioning frame, a transmission roller, a trapezoidal platform, and a partition; the transmission mechanism is arranged in the water inlet pipe, the lower part of the water inlet pipe is connected to the box body, the lower part of the transmission mechanism is connected to the filtering mechanism, the lower part of the filtering mechanism is connected to the stirring mechanism, the transmission mechanism provides power for the filtering mechanism and the stirring mechanism, the sludge pump is connected to the sewage discharge pipe of the filtering mechanism and is arranged on the upper part of the box body, and the stirring mechanism is connected to the filtering mechanism. A feed port is provided on the box on one side of the mixing mechanism, a partition is arranged in the middle of the box, a connecting valve is provided on the partition, two groups of heating pipes are provided on the other side of the partition, the heating pipes are arranged on the box, a conveyor belt is provided in the middle of the two groups of heating pipes, conveyor belt positioning frames are provided on both sides of the conveyor belt, the conveyor belt is driven to rotate by a driving roller, an air collecting hood is provided above the conveyor belt, the air collecting hood is connected to the cooling pipe, a trapezoidal platform is provided below the conveyor belt, a supporting rotating arm is provided on the trapezoidal platform, the supporting rotating arm supports a group of driving rollers, and guides the conveyor belt to the outside of the box, and a solid collection box is provided at the lower part of the conveyor belt outside the box and cooperates with a cleaning mechanism.

[0015] The transmission mechanism includes a motor I, a transmission shaft I, a turbine, a helical gear I, a helical gear II, a transmission shaft II, a connecting shaft I, a positioning sleeve, a ratchet, a connecting shaft II, a limit rack, a limit plate I, and a spring I; the turbine is arranged at one end of the transmission shaft I, the helical gear I is arranged on the transmission shaft I, the helical gear I meshes with the helical gear II, the helical gear II is arranged on the transmission shaft II, the other end of the transmission shaft I is connected to the ratchet, a positioning sleeve is arranged at the center of the ratchet, and four sets of limit plates I are arranged on the upper and lower sides of the positioning sleeve, and the limit plates I A groove is provided on it, three groups of springs I are provided between the limit plates I on the same side, the limit rack is arranged between the limit plates I, bosses are provided on both sides of the limit rack, the bosses match the grooves provided on the limit plate I, the limit rack is meshed with the ratchet on the outside, a groove is provided in the center circular hole of the positioning sleeve, a boss is provided on the connecting shaft I, the boss provided on the connecting shaft I matches the center groove of the positioning sleeve, the connecting shaft I is arranged inside the positioning sleeve, the other side of the connecting shaft I is connected to the connecting shaft II, and the connecting shaft II is connected to the motor I.

[0016] The filtering mechanism comprises a support frame, a spiral blade, a gear I, a gear II, a connecting rod I, a connecting shaft III, a connecting rod II, a limit slider, a limit shaft, a filter plate, a sewage pipe, a positioning plate I, a spring II, a positioning plate II, a telescopic rod, a spring III, a brush plate, an inclined scraper plate, and a spring IV; the support frame is arranged in the middle of the lower part of the water inlet pipe and is rotatably connected with the transmission shaft II; the spiral blade, the gear I, and the connecting rod I are arranged on the transmission shaft II from top to bottom, and the transmission shaft II of the transmission mechanism provides power; the connecting rod I is connected to the connecting rod II; a connecting shaft III is provided at the connection point between the connecting rod I and the connecting rod II, and a gear II is sleeved on the connecting shaft III; the connecting shaft III is rotatably connected with the gear II, and the gear II is meshed with the gear I at the same time. The connecting rod II is connected to the limit slider through a pin shaft and is rotatably connected to the limit slider. A round hole is provided in the middle of the limit slider, and a limit shaft is provided in the round hole and is slidably connected to the limit slider. Both ends of the limit shaft are fixed between the box body and the partition. A positioning plate I is provided at the lower part of the limit slider. Two groups of positioning plates II are connected at both sides of the positioning plate I through a pin shaft. A spring II is provided between the positioning plate I and the positioning plate II. The lower part of the positioning plate II is connected to the inclined scraper through a pin shaft. A spring IV is provided between the two groups of inclined scrapers. A telescopic rod is also provided on the positioning plate II. A spring III is sleeved on the telescopic rod. The lower part of the telescopic rod is connected to the brush plate through a pin shaft. The brush plate and the lower part of the inclined scraper are close to the filter plate. Drain pipes are provided on both sides of the filter plate, and the drain pipes are connected to the sludge pump.

[0017] The stirring mechanism comprises a connecting rod, a motor II, a waterproof cover, a connecting block, a rotating shaft, a rotating positioning plate, a driven plate, a stirring blade, a connecting shaft IV, and a connecting shaft V; the upper parts of two groups of connecting rods are connected to the positioning plate I of the filtering mechanism, and when the filtering mechanism performs reciprocating linear motion, the stirring mechanism is driven to move through the connecting rods, the lower part of one group of connecting rods is connected to the connecting block, and the lower part of the other group of connecting rods is connected to the waterproof cover, a motor II is arranged in the waterproof cover, the motor II is connected to the rotating shaft, and the other end of the rotating shaft is connected to the connecting block, two groups of rotating positioning plates are arranged at both ends of the rotating shaft, the rotating shaft is fixedly connected to the rotating positioning plate, a connecting shaft IV is arranged between the two groups of rotating positioning plates, two groups of driven plates are arranged on the connecting shaft IV and are rotatably connected to the connecting shaft IV, a connecting shaft V is arranged between the two groups of driven plates, and the stirring blades are arranged on the connecting shaft V and are rotatably connected to the connecting shaft V.

[0018] The cleaning mechanism includes a positioning plate III, a motor III, a limiting groove, a lead screw, a sliding connection block, a connecting rod III, an electric push rod, a wiping roller, a positioning plate IV, a motor IV, and a connecting seat; the positioning plate III is vertically connected to the positioning plate IV, the connecting seat is arranged on the positioning plate IV, the connecting seat is connected to the electric push rod through a pin shaft, the other end of the electric push rod is connected to the wiping roller, the limiting groove is arranged on the positioning plate III, a lead screw is arranged in the limiting groove, a motor III is arranged at the top of the limiting groove, the motor III is connected to the lead screw to control the rotation of the lead screw, the sliding connection block is arranged in the limiting groove, and the sliding connection block is slidably connected with the lead screw at the same time, the sliding connection block is connected to the wiping roller through the connecting rod III, and a motor IV is also arranged at one end of the wiping roller, and the motor IV controls the rotation of the wiping roller.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) The turbine of the transmission mechanism is driven by the sewage flow, and the flow of sewage entering the device is used to provide power for the transmission mechanism. The greater the sewage flow entering the device, the greater the power transmitted by the transmission mechanism to the subsequent filtering mechanism and the stirring mechanism, and the higher the working efficiency. When the sewage flow entering the water inlet pipe is too small to provide sufficient power for the transmission mechanism, the transmission mechanism's motor I is used to provide power, thereby saving energy without affecting the working efficiency of the device;

[0021] 2) The transmission mechanism drives the filter mechanism to reciprocate in a straight line. The inclined scraper of the filter mechanism fits the filter plate, and the brush plate fits the filter plate. When the filter mechanism reciprocates, the solid impurities on the filter plate are cleaned and scraped to the sewage pipe area on both sides, and then the sludge pump is used to extract the device;

[0022] 3) The neutralizer and flocculant are added into the box through the feed port, and the filtering mechanism drives the stirring mechanism to make reciprocating linear motion as a whole, driving the stirring blades to rotate and stir; the stirring mechanism rotates and stirs while making reciprocating motion, increasing the stirring area. The reciprocating motion speed is not uniform, and irregular mixed flow is generated between the stirring blades during the stirring process, so that the neutralizer and flocculant are better mixed with the sewage;

[0023] 4) The connecting rod III of the cleaning mechanism drives the wiping roller, and the electric push rod is extended to adjust the position of the wiping roller, so that the upper and lower sets of wiping rollers are close to the surface of the conveyor belt. The motor IV controls the wiping roller to rotate, wipe and clean the conveyor belt, and the swept solid impurities enter the solid collection box under the conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 This is a schematic diagram of a wastewater recycling system for a thermal power plant and its treatment process structure of the present invention. Figure 1 ;

[0025] Attached Figure 2 This is a schematic diagram of a wastewater recycling system for a thermal power plant and its treatment process structure of the present invention. Figure 2 ;

[0026] Attached Figure 3 This is a schematic diagram of a wastewater recycling system for a thermal power plant and its treatment process structure of the present invention. Figure 3 ;

[0027] Attached Figure 4 Yes Figure 1 Schematic diagram of the cross-section structure of the middle transmission mechanism;

[0028] Attached Figure 5 Yes Figure 1 Schematic diagram of the explosion structure of the transmission mechanism Figure 1 ;

[0029] Attached Figure 6 Yes Figure 1 Schematic diagram of the explosion structure of the transmission mechanism Figure 2 ;

[0030] Attached Figure 7 Yes Figure 1 Schematic diagram of the filter structure Figure 1 ;

[0031] Attached Figure 8 Yes Figure 1 Schematic diagram of the filter structure Figure 2 ;

[0032] Attached Fig. 9 Yes Figure 1 Schematic diagram of the mixing mechanism structure Figure 1 ;

[0033] Attached Fig.10 Yes Figure 1 Schematic diagram of explosion structure of the mixing mechanism;

[0034] Attached Fig.11 Yes Figure 1 Schematic diagram of the mixing mechanism structure Figure 2 ;

[0035] Attached Fig.12 Yes Figure 1 Schematic diagram of the cleaning mechanism structure Figure 1 ;

[0036] Attached Fig.13 This is a schematic diagram of a wastewater recycling system for a thermal power plant and its treatment process structure of the present invention. Figure 4 ;

[0037] Attached Fig.14 Yes Figure 1 Schematic diagram of the cleaning mechanism structure Figure 2 ;

[0038] In the figure: 11, transmission mechanism; 12, filtering mechanism; 13, stirring mechanism; 14, feed port; 15, sludge pump; 16, heating pipe; 17, air collecting hood; 18, cooling pipe; 19, conveyor belt; 20, cleaning mechanism; 21, supporting rotating arm; 22, solid collection box; 23, water inlet pipe; 24, box body; 25, connecting valve; 26, conveyor belt positioning frame; 27, transmission roller; 28, trapezoidal table; 29, partition; 101, motor Ⅰ; 102, transmission shaft Ⅰ; 103, turbine; 104, helical gear Ⅰ; 105, helical gear Ⅱ; 106, transmission shaft Ⅱ; 107, connecting shaft Ⅰ; 108, positioning sleeve; 109, ratchet; 110, connecting shaft Ⅱ; 111, limit rack; 112, limit plate Ⅰ; 113, spring Ⅰ; 201, support frame; 202, spiral fan blade; 203, gear Ⅰ; 204, gear Ⅱ; 205 , connecting rod Ⅰ; 206, connecting shaft Ⅲ; 207, connecting rod Ⅱ; 208, limit slider; 209, limit shaft; 210, filter plate; 211, sewage pipe; 212, positioning plate Ⅰ; 213, spring Ⅱ; 214, positioning plate Ⅱ; 215, telescopic rod; 216, spring Ⅲ; 217, brush plate; 218, oblique scraper; 219, spring Ⅳ; 301, connecting rod; 302, motor Ⅱ; 303, waterproof cover; 304 , connecting block; 305, rotating shaft; 306, rotating positioning plate; 307, driven plate; 308, stirring blade; 309, connecting shaft IV; 310, connecting shaft V; 401, positioning plate III; 402, motor III; 403, limiting groove; 404, lead screw; 405, sliding connecting block; 406, connecting rod III; 407, electric push rod; 408, wiping roller; 409, positioning plate IV; 410, motor IV; 411, connecting seat. DETAILED DESCRIPTION

[0039] To facilitate the understanding of those skilled in the art, Figure 1-14 , the technical solution of the present invention is further specifically described.

[0040] Example 1

[0041] 1) Filtration: The sewage passes through the filter plate, which is set to 5mm, to filter out large suspended solids in the sewage, and control the sewage flow rate to 0.6-1.0 m / s. The impurities in the sewage pass through the filtering mechanism, and the inclined scraper and brush plate scrape the filter plate to clean and scrape the solid impurities on the filter plate to the sewage pipe area on both sides, and then the sludge pump is used to extract the device;

[0042] 2) PH neutralization: quicklime or slaked lime is added to the sewage from the feed port to neutralize the sewage. The amount of quicklime added is 164 mg / L, and the amount of slaked lime added is 217 mg / L. The reaction time of lime and acidic substances is 30 minutes. The stirring mechanism rotates and stirs while performing reciprocating motion. The stirring rate is 300 rpm. During the stirring process, irregular mixed flow is generated between the stirring blades, so that the neutralizer is better mixed with the sewage and the reaction rate is accelerated.

[0043] 3) Evaporation: The heating tube is heated to 150°C to heat the sewage in the box. The operating pressure of atmospheric evaporation is 101.3kPa. The amount of water evaporated per unit time is 100 m³ / h. The sewage flow entering the evaporation container is controlled to be 90 m³ / h. The generated water vapor rises through the gas collecting hood;

[0044] 4) Condensation: The water vapor in the gas collecting hood is cooled by a cooling pipe. Cooling water is provided outside the cooling pipe to ensure that the cooling water temperature is 20-35°C. The condensing water temperature is 5-10°C higher than the cooling water. The condensing water flow rate is 10-50 m³ / h.

[0045] 5) Crystallization: After evaporation, the salt in the water body crystallizes and precipitates. The components of the crystallized salt are Na2SO4 and NaCl. The crystallization rate is 0.1-1.0 kg / (m³·h). The moisture content of the finished product is 1%. It is sent out of the device box via the conveyor belt. The upper and lower groups of wiping rollers of the cleaning mechanism are close to the surface of the conveyor belt. Motor IV controls the wiping rollers to rotate and wipe and clean the conveyor belt. The solid crystals swept down enter the solid collection box under the conveyor belt.

[0046] 6) Flocculation and sedimentation: After the sewage is treated in the above steps, coagulants and flocculants are added to the sewage. Ferric chloride is used as the coagulant at a dosage of 120 mg / L, and polyacrylamide is used as the flocculant at a dosage of 0.5 mg / L. The wastewater is stirred at a speed of 160 rpm for 20 minutes. After removing the precipitation and flocculation in the liquid, the remaining liquid is tested to complete the sewage treatment.

[0047] A wastewater recycling system for a thermal power plant comprises a transmission mechanism 11, a filtering mechanism 12, a stirring mechanism 13, a feed port 14, a sludge pump 15, a heating pipe 16, a gas collecting hood 17, a cooling pipe 18, a conveyor belt 19, a cleaning mechanism 20, a supporting rotating arm 21, a solid collecting box 22, a water inlet pipe 23, a box body 24, a connecting valve 25, a conveyor belt positioning frame 26, a transmission roller 27, a trapezoidal platform 28, and a partition 29; the transmission mechanism 11 is arranged in the water inlet pipe 23, the lower part of the water inlet pipe 23 is connected to the box body 24, the lower part of the transmission mechanism 11 is connected to the filtering mechanism 12, the lower part of the filtering mechanism 12 is connected to the stirring mechanism 13, the transmission mechanism 11 provides power for the filtering mechanism 12 and the stirring mechanism 13, the sludge pump 15 is connected to the sewage discharge pipe 211 of the filtering mechanism 12 and is arranged on the upper part of the box body 24, and the transmission mechanism 11 is connected to the filtering mechanism 12. A feed port 14 is provided on the box body 24 on one side of the stirring mechanism 13, a partition 29 is arranged in the middle of the box body 24, a connecting valve 25 is provided on the partition 29, two groups of heating pipes 16 are provided on the other side of the partition 29, the heating pipes 16 are arranged on the box body 24, a conveyor belt 19 is provided in the middle of the two groups of heating pipes 16, conveyor belt positioning frames 26 are provided on both sides of the conveyor belt 19, the conveyor belt 19 is driven to rotate by a transmission roller 27, an air collecting hood 17 is provided above the conveyor belt 19, the air collecting hood 17 is connected to the cooling pipe 18, a trapezoidal platform 28 is provided below the conveyor belt 19, a supporting rotating arm 21 is provided on the trapezoidal platform 28, the supporting rotating arm 21 supports a group of transmission rollers 27, and guides the conveyor belt 19 to the outside of the box body 24, and a solid collection box 22 is provided at the lower part of the conveyor belt 19 outside the box body 24 and cooperates with the cleaning mechanism 20.

[0048] The transmission mechanism 11 includes a motor Ⅰ101, a transmission shaft Ⅰ102, a turbine 103, a bevel gear Ⅰ104, a bevel gear Ⅱ105, a transmission shaft Ⅱ106, a connecting shaft Ⅰ107, a positioning sleeve 108, a ratchet 109, a connecting shaft Ⅱ110, a limit rack 111, a limit plate Ⅰ112, and a spring Ⅰ113; the turbine 103 is arranged at one end of the transmission shaft Ⅰ102, the bevel gear Ⅰ104 is arranged on the transmission shaft Ⅰ102, the bevel gear Ⅰ104 meshes with the bevel gear Ⅱ105, the bevel gear Ⅱ105 is arranged on the transmission shaft Ⅱ106, and the other end of the transmission shaft Ⅰ102 is connected to the ratchet 109, the center of the ratchet 109 is provided with a positioning sleeve 108, and the upper and lower sides of the positioning sleeve 108 are provided with four A limit plate Ⅰ112 is provided, a groove is provided on the limit plate Ⅰ112, three groups of springs Ⅰ113 are provided between the limit plates Ⅰ112 on the same side, a limit rack 111 is provided between the limit plates Ⅰ112, bosses are provided on both sides of the limit rack 111, the bosses match the grooves provided on the limit plate Ⅰ112, the limit rack 111 is meshed with the outer ratchet 109, a groove is provided in the center circular hole of the positioning sleeve 108, a boss is provided on the connecting shaft Ⅰ107, the boss provided on the connecting shaft Ⅰ107 matches the center groove of the positioning sleeve 108, the connecting shaft Ⅰ107 is provided inside the positioning sleeve 108, the other side of the connecting shaft Ⅰ107 is connected to the connecting shaft Ⅱ110, and the connecting shaft Ⅱ110 is connected to the motor Ⅰ101;

[0049] When sewage enters the water inlet pipe 23 and passes through the transmission mechanism 11, the sewage flow drives the turbine 103 to rotate, the turbine 103 drives the transmission shaft Ⅰ102 to rotate, the transmission shaft Ⅰ102 drives the bevel gear Ⅰ104 to rotate, the bevel gear Ⅰ104 engages with the bevel gear Ⅱ105, and the bevel gear Ⅱ105 drives the transmission shaft Ⅱ106 to rotate. At this time, the ratchet 109 rotates clockwise, and the limiting rack 111 inside the ratchet 109 cannot play the role of limiting the ratchet 109. The limiting rack 111 and the positioning sleeve 108 inside the ratchet 109 are stationary. When the sewage flow entering the water inlet pipe 23 is too small to provide sufficient power for the transmission mechanism 11, the motor Ⅰ101 is started, and the motor Ⅰ101 drives the connecting shaft Ⅱ110 and the connecting shaft Ⅰ107. The connecting shaft Ⅰ107 is set The positioning sleeve 108 is arranged inside the positioning sleeve 108 and drives the positioning sleeve 108 through the keyway. The limit racks 111 on the upper and lower sides of the positioning sleeve 108 are arranged between the limit plates Ⅰ112. The limit racks 111 are slidably connected up and down between the two sets of limit plates Ⅰ112 through the racks arranged on the limit racks 111 and the limit plates Ⅰ112, and then the limit racks 111 are contacted with the ratchet 109 through the spring Ⅰ113 arranged below the limit racks 111. When the motor Ⅰ101 drives the positioning sleeve 108 to rotate through the connecting shaft Ⅰ107, the limit racks 111 on the upper and lower sides of the positioning sleeve 108 engage the ratchet 109 to drive the ratchet 109 to rotate clockwise, and the ratchet 109 drives the transmission shaft Ⅰ102 to rotate. At this time, the transmission mechanism 11 is powered by the motor Ⅰ101.

[0050] The filtering mechanism 12 includes a support frame 201, a spiral blade 202, a gear I 203, a gear II 204, a connecting rod I 205, a connecting shaft III 206, a connecting rod II 207, a limit slider 208, a limit shaft 209, a filter plate 210, a sewage pipe 211, a positioning plate I 212, a spring II 213, a positioning plate II 214, a telescopic rod 215, a spring III 216, a brush plate 217, an inclined scraper 218, and a spring IV 219; the support frame 201 is arranged on the water inlet pipe 23 The middle of the lower part is connected to the transmission shaft II 106 for rotation. The spiral blade 202, the gear I 203, and the connecting rod I 205 are arranged on the transmission shaft II 106 from top to bottom. The transmission shaft II 106 of the transmission mechanism 11 provides power. The connecting rod I 205 is connected to the connecting rod II 207. The connecting point between the connecting rod I 205 and the connecting rod II 207 is provided with a connecting shaft III 206. The connecting shaft III 206 is sleeved with a gear II 204. The connecting shaft III 206 is connected to the gear II 204 for rotation. The gear II 204 is also connected to the connecting shaft III 206. The connecting rod Ⅱ 207 is meshed with the gear Ⅰ 203, and the connecting rod Ⅱ 207 is connected to the limit slider 208 through a pin shaft and is rotatably connected to the limit slider 208. A circular hole is provided in the middle of the limit slider 208, and a limit shaft 209 is provided in the circular hole and is slidably connected to the limit slider 208. Both ends of the limit shaft 209 are fixed between the box body 24 and the partition plate 29. A positioning plate Ⅰ 212 is provided at the lower part of the limit slider 208. Two sets of positioning plates Ⅱ 214 are connected at both sides of the positioning plate Ⅰ 212 through a pin shaft. The positioning plate Ⅰ 212 and the positioning plate Ⅱ 214 are connected. 4, a spring II 213 is provided between the positioning plate II 214, the lower part of the positioning plate II 214 is connected to the inclined scraper 218 through a pin shaft, a spring IV 219 is provided between the two groups of inclined scrapers 218, a telescopic rod 215 is also provided on the positioning plate II 214, a spring III 216 is sleeved on the telescopic rod 215, the lower part of the telescopic rod 215 is connected to the brush plate 217 through a pin shaft, the brush plate 217 and the lower part of the inclined scraper 218 are close to the filter plate 210, and sewage pipes 211 are provided on both sides of the filter plate 210, and the sewage pipes 211 are connected to the sludge pump 15;

[0051] When the transmission shaft II 106 of the transmission mechanism 11 rotates, the spiral blade 202, the gear I 203 and the connecting rod I 205 on the transmission shaft II 106 are driven to rotate, the gear I 203 meshes with the gear II 204, the connecting rod I 205 drives the connecting rod II 207, the two sets of gears provide power for the connecting rod mechanism, the connecting rod II 207 drives the limit slider 208 to slide along the limit shaft 209 to make reciprocating linear motion, the limit slider 208 drives the positioning plate I 212, the positioning plate I 212 drives the positioning plate II 214 below, the positioning plate II 214 drives the inclined scraper 218, the positioning The spring II213 between the plate I212 and the positioning plate II214, and the spring IV219 between the two sets of inclined scrapers 218, ensure that the inclined scrapers 218 fit the filter plate 210. The positioning plate II214 drives the telescopic rod 215 at the same time, and the telescopic rod 215 drives the brush plate 217 below. The spring III216 sleeved on the telescopic rod 215 ensures that the brush plate 217 fits the filter plate 210. When the filtering mechanism 12 reciprocates, the solid impurities on the filter plate 210 are cleaned and scraped to the sewage pipe 211 area on both sides, and then the sludge pump 15 extracts the device.

[0052] The stirring mechanism 13 includes a connecting rod 301, a motor II 302, a waterproof cover 303, a connecting block 304, a rotating shaft 305, a rotating positioning plate 306, a driven plate 307, a stirring blade 308, a connecting shaft IV 309, and a connecting shaft V 310; the upper part of two groups of connecting rods 301 is connected to the positioning plate I 212 of the filtering mechanism 12, and when the filtering mechanism 12 performs reciprocating linear motion, the stirring mechanism 13 is driven to move through the connecting rods 301, the lower part of one group of connecting rods 301 is connected to the connecting block 304, and the lower part of the other group of connecting rods 301 is connected to the waterproof cover 303, and the waterproof cover 303 is provided with a motor II 302, the motor II 302 is connected to the rotating shaft 305, and the other end of the rotating shaft 305 is connected to the connecting block 304, and two groups of rotating positioning plates 306 are provided at both ends of the rotating shaft 305, and the rotating shaft 305 is fixedly connected with the rotating positioning plate 306, a connecting shaft IV 309 is provided between the two groups of rotating positioning plates 306, two groups of driven plates 307 are arranged on the connecting shaft IV 309 and are rotatably connected to the connecting shaft IV 309, a connecting shaft V 310 is provided between the two groups of driven plates 307, and a stirring blade 308 is arranged on the connecting shaft V 310 and is rotatably connected to the connecting shaft V 310; the filtering mechanism 12 drives the stirring mechanism 13 to make a reciprocating linear motion as a whole through the connecting rod 301, the motor II 302 drives the rotating shaft 305 to rotate, the rotating shaft 305 drives the rotating positioning plates 306 on both sides, the rotating positioning plates 306 drive the connecting shaft IV 309, the connecting shaft IV 309 drives the two groups of driven plates 307 and the connecting shaft V 310, and the connecting shaft V 310 drives the stirring blade 308 to rotate and stir.

[0053] The cleaning mechanism 20 includes a positioning plate III 401, a motor III 402, a limiting groove 403, a lead screw 404, a sliding connection block 405, a connecting rod III 406, an electric push rod 407, a wiping roller 408, a positioning plate IV 409, a motor IV 410, and a connecting seat 411; the positioning plate III 401 is vertically connected to the positioning plate IV 409, the connecting seat 411 is arranged on the positioning plate IV 409, the connecting seat 411 is connected to the electric push rod 407 through a pin shaft, the other end of the electric push rod 407 is connected to the wiping roller 408, the limiting groove 403 is arranged on the positioning plate III 401, the limiting groove 403 is provided with a lead screw 404, the top of the limiting groove 403 is provided with a motor III 402, the motor III 402 is connected to the lead screw 404 to control the lead screw 4 04 rotates, the sliding connection block 405 is arranged in the limiting groove 403, and the sliding connection block 405 is slidably connected with the lead screw 404, the sliding connection block 405 is connected to the wiping roller 408 through the connecting rod III 406, and a motor IV 410 is also arranged at one end of the wiping roller 408, and the motor IV 410 controls the rotation of the wiping roller 408; the motor III 402 controls the lead screw 404 to rotate, so that the sliding connection block 405 moves in the limiting groove 403, drives the connecting rod III 406, and the connecting rod III 406 drives the wiping roller 408, cooperates with the electric push rod 407 to telescope and adjust the position of the wiping roller 408, so that the upper and lower groups of wiping rollers 408 are close to the surface of the conveyor belt 19, and the motor IV 410 controls the wiping roller 408 to rotate, and the conveyor belt 19 is wiped and cleaned.

[0054] Example 2

[0055] A thermal power plant wastewater recycling system and a treatment process thereof, wherein the other steps are the same as those of Example 1, and the difference from Example 1 is that: in step (1), the filter plate is set to 20 mm, and the flow rate of the wastewater passing through the filter plate downward is controlled at 0.6 m / s; in step (2), the amount of quicklime added is 134 mg / L, the amount of slaked lime added is 177 mg / L, the reaction time is set to 10 minutes, and the stirring rate is 150 rpm; in step (3), the heating tube is heated to 105°C, and the wastewater flow rate entering the evaporation container is controlled to be 20 m³ / h; in step (6), the amounts of coagulant and flocculant added are 40 mg / L and 0.2 mg / L, respectively.

[0056] Example 3

[0057] A thermal power plant wastewater recycling system and treatment process thereof, wherein the other steps are the same as those of Example 1, and the difference from Example 1 is that: in step (1), the filter plate is set to 15 mm, and the flow rate of the wastewater passing through the filter plate downward is controlled at 0.8 m / s; in step (2), the amount of quicklime added is 149 mg / L, the amount of slaked lime added is 197 mg / L, the reaction time is set to 20 minutes, and the stirring rate is 200 rpm; in step (3), the heating tube is heated to 135°C, and the wastewater flow rate entering the evaporation container is controlled to be 50 m³ / h; in step (6), the amounts of coagulant and flocculant added are 80 mg / L and 0.3 mg / L, respectively.

[0058] Comparative Example 1:

[0059] The difference from Example 1 is that no neutralizing agent is added to the sewage during step (2).

[0060] Comparative Example 2:

[0061] The difference from Example 1 is that when performing step (3), the stirring mechanism is no longer controlled to stir the sewage.

[0062] The thermal power plant wastewater treated by the above embodiments and comparative examples was tested, and the test results are shown in Table 1;

[0063] Table 1 Test results of various embodiments and comparative examples:

[0064] Suspended matter mg / L PH Sulfide concentration mg / L Total dissolved solids mg / L Crystallization rate m³·h Example 1 3 7.5 0.18 875 0.9 Example 2 5 7.1 0.47 1257 0.4 Example 3 4 7.3 0.31 1049 0.6 Comparative Example 1 4 3.2 2.52 2325 0.05 Comparative Example 2 4 6.2 1.06 1945 0.2

[0065] By comparing the data of Examples 1-3 with Comparative Example 2, it can be seen that after the sewage and the neutralizer are uniformly mixed by the stirring device 4, the sewage can be treated better.

[0066] It can be seen from the data of Examples 1-3 and Comparative Examples 1 and 2 in Table 1 that industrial wastewater can meet the reuse standards specified in the Pollutant Emission Standards for Thermal Power Plants (GB 13223-2011) after being treated by the process and device provided by the present invention.

[0067] In the description of the present invention, unless otherwise specified, “plurality” means two or more than two; the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inside”, “outside”, “front end”, “rear end”, “head” and “tail” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0068] In summary, electronic or electrical components including but not limited to motors, electric push rods, etc. are components in the prior art, obtained through private customization or purchase, and the electrical connections between the components are conventional circuit connections or electrical connections in the prior art and are not within the scope of protection of the present invention.

[0069] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A thermal power plant wastewater recycling system and its treatment process, characterized in that The specific steps are as follows: 1) Filtration: The sewage passes through the filter plate, which is set to 5-20mm, to filter out large suspended particles in the sewage, and control the sewage flow rate to 0.6-1.0 m / s. The impurities in the sewage pass through the filtering mechanism, and the inclined scraper and brush plate scrape the filter plate to clean and scrape the solid impurities on the filter plate to the sewage pipe area on both sides, and then the sludge pump is used to extract the device; 2) PH neutralization: Add quicklime or slaked lime to the sewage from the feed port to neutralize the sewage. The purity of lime is usually 85%-95%. According to the different PH values ​​of the wastewater, the amount of quicklime added is 134-164 mg / L, and the amount of slaked lime added is 177-217 mg / L. The reaction time of lime and acidic substances is 10-30 minutes. The stirring mechanism rotates and stirs while performing reciprocating motion. The stirring rate is 150-300 rpm. During the stirring process, irregular mixed flow is generated between the stirring blades, so that the neutralizer is better mixed with the sewage and the reaction rate is accelerated. 3) Evaporation: Heat the heating tube to 105-150°C to heat the sewage in the box. The operating pressure of atmospheric evaporation is 101.3kPa, and the amount of water evaporated per unit time is 10-100 m³ / h. The sewage flow entering the evaporation container is controlled to be less than 100 m³ / h, and the generated water vapor rises through the gas collecting hood; 4) Condensation: The water vapor in the gas collecting hood is cooled by a cooling pipe. Cooling water is provided outside the cooling pipe to ensure that the cooling water temperature is 20-35°C. The condensing water temperature is 5-10°C higher than the cooling water. The condensing water flow rate is 10-50 m³ / h. 5) Crystallization: After evaporation, the salt in the water body crystallizes and precipitates, the crystallization temperature is 30-50°C, the crystallized salt components are Na2SO4 and NaCl, the crystallization rate is 0.1-1.0 kg / (m³·h), the moisture content of the finished product is less than 1%, and it is sent out of the device box via the conveyor belt. The upper and lower groups of wiping rollers of the cleaning mechanism are close to the surface of the conveyor belt. Motor IV controls the wiping rollers to rotate and wipe and clean the conveyor belt. The solid crystals swept down enter the solid collection box under the conveyor belt; 6) Flocculation and sedimentation: After the sewage is treated in the above steps, coagulants and flocculants are added to the sewage. Ferric chloride is used as the coagulant at a dosage of 40-120 mg / L, and polyacrylamide is used as the flocculant at a dosage of 0.2-0.5 mg / L. The wastewater is stirred at a speed of 125-160 rpm for 15-20 minutes. After removing the precipitation and flocculation in the liquid, the remaining liquid is tested to complete the sewage treatment.

2. A thermal power plant wastewater recycling system according to claim 1, characterized in that It includes a transmission mechanism, a filtering mechanism, a stirring mechanism, a feed port, a sludge pump, a heating pipe, an air collecting hood, a cooling pipe, a conveyor belt, a cleaning mechanism, a supporting rotating arm, a solid collecting box, a water inlet pipe, a box body, a connecting valve, a conveyor belt positioning frame, a transmission roller, a trapezoidal platform, and a partition; the transmission mechanism is arranged in the water inlet pipe, the lower part of the water inlet pipe is connected to the box body, the lower part of the transmission mechanism is connected to the filtering mechanism, the lower part of the filtering mechanism is connected to the stirring mechanism, the transmission mechanism provides power for the filtering mechanism and the stirring mechanism, the sludge pump is connected to the sewage pipe of the filtering mechanism and is arranged on the upper part of the box body, and the box body on one side of the stirring mechanism A feed port is provided on the body, a partition is arranged in the middle of the box body, a connecting valve is provided on the partition, two groups of heating pipes are provided on the other side of the partition, the heating pipes are arranged on the box body, a conveyor belt is provided in the middle of the two groups of heating pipes, conveyor belt positioning frames are provided on both sides of the conveyor belt, the conveyor belt is driven to rotate by a driving roller, an air collecting hood is provided above the conveyor belt, the air collecting hood is connected to the cooling pipe, a trapezoidal platform is provided below the conveyor belt, a supporting rotating arm is provided on the trapezoidal platform, the supporting rotating arm supports a group of driving rollers, and guides the conveyor belt to the outside of the box body, and a solid collection box is provided at the lower part of the conveyor belt outside the box body and cooperates with a cleaning mechanism.

3. A thermal power plant wastewater recycling system according to claim 1, characterized in that The transmission mechanism comprises a motor I, a transmission shaft I, a turbine, a helical gear I, a helical gear II, a transmission shaft II, a connecting shaft I, a positioning sleeve, a ratchet, a connecting shaft II, a limit rack, a limit plate I, and a spring I; the turbine is arranged at one end of the transmission shaft I, the helical gear I is arranged on the transmission shaft I, the helical gear I meshes with the helical gear II, the helical gear II is arranged on the transmission shaft II, the other end of the transmission shaft I is connected to the ratchet, a positioning sleeve is arranged at the center of the ratchet, four sets of limit plates I are arranged on the upper and lower sides of the positioning sleeve, the limit plate I is provided with a groove, and the same side limit Three groups of springs I are arranged between the positioning plates I, the limiting racks are arranged between the limiting plates I, bosses are arranged on both sides of the limiting racks, the bosses match with the grooves arranged on the limiting plates I, the limiting racks mesh with the ratchet on the outside, a groove is arranged in the center circular hole of the positioning sleeve, a boss is arranged on the connecting shaft I, the bosses arranged on the connecting shaft I match with the center groove of the positioning sleeve, the connecting shaft I is arranged inside the positioning sleeve, the other side of the connecting shaft I is connected to the connecting shaft II, and the connecting shaft II is connected to the motor I; when the sewage enters the water inlet pipe and passes through the transmission mechanism, the sewage The water flow drives the turbine to rotate, the turbine drives the transmission shaft I to rotate, the transmission shaft I drives the bevel gear I to rotate, the bevel gear I meshes with the bevel gear II, the bevel gear II drives the transmission shaft II to rotate, at this time the ratchet rotates clockwise, the limit rack inside the ratchet cannot play the role of the limit ratchet, the limit rack inside the ratchet and the positioning sleeve are stationary, when the sewage flow entering the water inlet pipe is too small to provide sufficient power for the transmission mechanism, the motor I starts, and the motor I drives the connecting shaft II and the connecting shaft I, and the connecting shaft I is set inside the positioning sleeve through The keyway drives the positioning sleeve, and the limit racks on the upper and lower sides of the positioning sleeve are arranged between the limit plates I. The limit racks are slid up and down and connected between the two sets of limit plates I through the racks on the limit rack and the limit plate I, and then the limit racks are touched by the spring I arranged below the limit rack to engage the ratchet. When the motor I drives the positioning sleeve to rotate through the connecting shaft I, the limit racks on the upper and lower sides of the positioning sleeve engage the ratchet to drive the ratchet to rotate clockwise, and the ratchet drives the transmission shaft I to rotate. At this time, the transmission mechanism is powered by the motor I.

4. A thermal power plant wastewater recycling system according to claim 1, characterized in that The filtering mechanism comprises a support frame, a spiral blade, a gear I, a gear II, a connecting rod I, a connecting shaft III, a connecting rod II, a limit slider, a limit shaft, a filter plate, a sewage pipe, a positioning plate I, a spring II, a positioning plate II, a telescopic rod, a spring III, a brush plate, an inclined scraper plate, and a spring IV; the support frame is arranged in the middle of the lower part of the water inlet pipe and is rotatably connected to the transmission shaft II; the spiral blade, the gear I, and the connecting rod I are arranged on the transmission shaft II from top to bottom, and the transmission shaft II of the transmission mechanism provides power; the connecting rod I is connected to the connecting rod II, and the connecting point of the connecting rod I and the connecting rod II is provided with Gear II is sleeved on connecting shaft III and connecting shaft III, connecting shaft III is rotatably connected with gear II, gear II is meshed with gear I at the same time, connecting rod II is rotatably connected with limit slider through pin shaft, a round hole is arranged in the middle of limit slider, a limit shaft is slidably connected with limit slider in the round hole, both ends of limit shaft are fixed between box body and partition plate, positioning plate I is arranged at the bottom of limit slider, two sets of positioning plates II are connected at both sides of positioning plate I through pin shaft, spring II is arranged between positioning plate I and positioning plate II, the bottom of positioning plate II is connected with inclined plate I through pin shaft Scraper, a spring IV is arranged between the two groups of inclined scrapers, a telescopic rod is also arranged on the positioning plate II, a spring III is sleeved on the telescopic rod, the lower part of the telescopic rod is connected to the brush plate through a pin shaft, the brush plate and the lower part of the inclined scraper are close to the filter plate, sewage pipes are arranged on both sides of the filter plate, and the sewage pipes are connected to the sludge pump; when the transmission shaft II of the transmission mechanism rotates, the spiral blades, gear I and connecting rod I on the transmission shaft II are driven to rotate, the gear I meshes with the gear II, the connecting rod I drives the connecting rod II, the two groups of gears provide power for the connecting rod mechanism, and the connecting rod II drives the limit slider to slide along the limit shaft to move forward The limit slider drives the positioning plate I, the positioning plate I drives the positioning plate II below, the positioning plate II drives the inclined scraper, the spring II between the positioning plate I and the positioning plate II, and the spring IV between the two sets of inclined scrapers ensure that the inclined scraper fits the filter plate, the positioning plate II drives the telescopic rod at the same time, the telescopic rod drives the brush plate below, the spring III sleeved on the telescopic rod ensures that the brush plate fits the filter plate, when the filtering mechanism reciprocates, the solid impurities on the filter plate are cleaned and scraped to the sewage pipe area on both sides, and then extracted by the sludge pump.

5. A thermal power plant wastewater recycling system according to claim 1, characterized in that The stirring mechanism includes a connecting rod, a motor II, a waterproof cover, a connecting block, a rotating shaft, a rotating positioning plate, a driven plate, a stirring blade, a connecting shaft IV, and a connecting shaft V; the upper parts of the two groups of connecting rods are connected to the positioning plate I of the filtering mechanism, and when the filtering mechanism performs reciprocating linear motion, the stirring mechanism is driven to move through the connecting rods, the lower part of one group of connecting rods is connected to the connecting block, and the lower part of the other group of connecting rods is connected to the waterproof cover, a motor II is arranged in the waterproof cover, the motor II is connected to the rotating shaft, and the other end of the rotating shaft is connected to the connecting block, two groups of rotating positioning plates are arranged at both ends of the rotating shaft, and the rotating shaft and the rotating shaft are connected to the connecting block. The positioning plates are fixedly connected, a connecting shaft IV is provided between the two sets of rotating positioning plates, two sets of driven plates are arranged on the connecting shaft IV and are rotationally connected to the connecting shaft IV, a connecting shaft V is provided between the two sets of driven plates, and a stirring blade is arranged on the connecting shaft V and is rotationally connected to the connecting shaft V; the stirring mechanism is driven to make reciprocating linear motion as a whole through the connecting rod filtering mechanism, the motor II drives the rotating shaft to rotate, the rotating shaft drives the rotating positioning plates on both sides, the rotating positioning plates drive the connecting shaft IV, the connecting shaft IV drives the two sets of driven plates and the connecting shaft V, and the connecting shaft V drives the stirring blade to rotate and stir.

6. A thermal power plant wastewater recycling system according to claim 1, characterized in that The cleaning mechanism comprises a positioning plate III, a motor III, a limiting groove, a lead screw, a sliding connection block, a connecting rod III, an electric push rod, a wiping roller, a positioning plate IV, a motor IV, and a connecting seat; the positioning plate III is vertically connected to the positioning plate IV, the connecting seat is arranged on the positioning plate IV, the connecting seat is connected to the electric push rod through a pin shaft, the other end of the electric push rod is connected to the wiping roller, the limiting groove is arranged on the positioning plate III, a lead screw is arranged in the limiting groove, a motor III is arranged at the top of the limiting groove, the motor III is connected to the lead screw to control the rotation of the lead screw, the sliding connection block is arranged in the limiting groove, and the sliding connection block is slidably connected with the lead screw at the same time, the sliding connection block is connected to the wiping roller through the connecting rod III, and a motor IV is also arranged at one end of the wiping roller, and the motor IV controls the rotation of the wiping roller; the motor III controls the rotation of the lead screw to move the sliding connection block in the limiting groove, drive the connecting rod III, the connecting rod III drives the wiping roller, and cooperates with the electric push rod to adjust the position of the wiping roller so that the upper and lower groups of wiping rollers are close to the surface of the conveyor belt, and the motor IV controls the rotation of the wiping roller to wipe and clean the conveyor belt.

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