Zero-discharge wastewater treatment device and method

Abstract

The invention relates to the field of wastewater treatment and discloses a zero-emission wastewater treatment device, wherein the top of the slide is fixedly connected to an air outlet, the inner wall of the air outlet is slidably connected to a slide rod, the outer surface of the slide rod is slidably connected to a top plate, the top of the top plate fits the inner wall of the air outlet, the bottom of the slide rod is fixedly connected to an air clean bin, the bottom of the air clean bin is symmetrically provided with a conduit, the top of the conduit is fixedly connected to the bottom of the air clean bin, the inner wall of the conduit is rotatably connected to a runner, the inner wall of the air clean bin is fixedly connected to the outer surface of the air guide cylinder, water vapor is recycled and utilized, harmful gases are purified separately, water vapor and chemicals are prevented from fusing, and the concentration of chemicals is reduced to affect the purification effect. By arranging a cleaning plate, wastewater crystals on the inner wall of the treatment bin are vibrated and cleaned to prevent excessive crystallization of the inner wall, which affects the heating effect. At the same time, if the crystals are not cleaned in time, the difficulty of later treatment is increased.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and in particular to a zero-discharge wastewater treatment device and method thereof. Background Art

[0002] Industrial high-salinity wastewater refers to wastewater with a high total salt content, primarily from chemical plants and the collection and processing of oil and natural gas. This wastewater contains a variety of substances (including salt, oil, organic heavy metals, and radioactive substances). Removing organic pollutants from industrial high-salinity wastewater is crucial to the environmental impact, and typically involves the use of zero-emission evaporation and crystallization equipment.

[0003] Most of the existing industrial high-salt wastewater evaporation and crystallization zero-emission devices have similar structures. They use multi-effect evaporators for evaporation and crystallization, and often directly pass high-salt wastewater into the device for evaporation. The direct introduction of high-salt wastewater causes it to easily deposit inside the heating tank and cannot be fully and evenly dispersed, which directly leads to the evaporation and crystallization efficiency being relatively general, requiring a long evaporation time, and the equipment operation cost is also high. In addition, during evaporation and crystallization, it is inevitable that some crystals will adhere to the inner wall of the heating tank. The long-term accumulation of crystals will affect the operation of the device to a certain extent, requiring staff to clean it regularly. The cleaning work is also more troublesome, time-consuming and labor-intensive. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention adopts the following technical solution to solve the technical problems: a zero-emission wastewater treatment device, comprising a supporting mechanism, the inner wall of the supporting mechanism is fixedly connected to a stirring mechanism, the top of the stirring mechanism is fixedly connected to an air purification mechanism, the air purification mechanism comprises an air guide cylinder, the outer surface of the air guide cylinder is fixedly connected to a water collecting bin, the inner wall of the air guide cylinder is fixedly connected to an air inlet cylinder, the inner wall of the air guide cylinder is fixedly connected to a cooling plate, the outer surface of the air guide cylinder is fixedly connected to a connecting bin, and further comprises a purification mechanism, comprising a slide plate slidably connected to the inner wall of the connecting bin, the top of the slide plate is fixedly connected to an air outlet cylinder, the inner wall of the air outlet cylinder is fixedly connected A sliding rod is slidably connected, and the outer surface of the sliding rod is slidably connected to a top plate, the top of the top plate fits into the inner wall of the air outlet tube, and the bottom of the sliding rod is fixedly connected to a clean air bin, and a conduit is symmetrically provided at the bottom of the clean air bin, the top of the conduit is fixedly connected to the bottom of the clean air bin, and the inner wall of the conduit is rotatably connected to a runner, and the inner wall of the clean air bin is fixedly connected to the outer surface of the air guide tube. During operation, the evaporated gas is passed into the air guide tube through the air inlet tube, and the water vapor is condensed and collected into the water collection bin through the cooling plate. The clean air bin in the purification mechanism is mixed with the agent to react and purify the harmful gas. At the same time, the accumulated pressure of the purified gas increases to push the top plate.

[0005] Furthermore, the support mechanism includes a base plate, a support plate is symmetrically provided on the top of the base plate, the bottom of the support plate is fixedly connected to the top of the base plate, the inner wall of the support plate is rotatably connected to the processing bin, the outer surface of the processing bin is symmetrically provided with a gear disk, the inner wall of the gear disk is fixedly connected to the outer surface of the processing bin, the outer surface gear of the gear disk is meshed with a transmission shaft, the outer surface gear of the transmission shaft is meshed with a motor, the bottom of the motor is fixedly connected to the top of the base plate, the outer surface of the base plate is symmetrically provided with a support disk, the inner wall of the support disk is fixedly connected to the outer surface of the base plate, the top of the support disk is fixedly connected with a support leg, and the inner wall of the processing bin is fixedly connected with a feed pipe. During operation, wastewater is flushed into the processing bin through the feed pipe, and the processing bin is driven to rotate by the rotation of the motor, so that the internal wastewater is fully heated and reacted, preventing uneven heating caused by traditional heating methods and affecting the efficiency of wastewater treatment.

[0006] Furthermore, the stirring mechanism includes a connecting shaft, the outer surface of the connecting shaft is fixedly connected to a connecting disk, the inner wall of the connecting disk is symmetrically provided with a scraping mechanism, the outer surface of the scraping mechanism is fixedly connected to the inner wall of the connecting disk, the outer surface of the connecting shaft is symmetrically provided with a stirring blade mechanism, the opposite side of the stirring blade mechanism is fixedly connected to the outer surface of the connecting shaft, the outer surface of the connecting shaft is symmetrically provided with a cleaning mechanism, the opposite side of the cleaning mechanism is fixedly connected to the outer surface of the connecting shaft, the outer surface of the connecting shaft is symmetrically provided with a scraping rod, the opposite side of the scraping rod is fixedly connected to the outer surface of the connecting shaft The center of the outer surface of the connecting shaft is fixedly connected with a swivel, the outer surface of the swivel is fixedly connected with a connecting ring, the scraper mechanism includes a pressure rod, the inner wall of the pressure rod is fixedly connected to the outer surface of the connecting disk, the inner wall of the pressure rod is provided with a scraper, the outer surface of the scraper is in contact with the inner wall of the pressure rod, the inner wall of the scraper is rotatably connected to a fixed rod, and the end of the fixed rod away from the scraper is fixedly connected to the inner wall of the connecting disk. During operation, by connecting the connecting disk to the processing bin, the connecting shaft is rotated, driving the scraper mechanism to work, and the inner wall of the connected inner disk is scraped and cleaned by the scraper.

[0007] Furthermore, the stirring blade mechanism includes a stirring rod, the outer surface of which is rotatably connected to a stirring wheel, fixed disks are symmetrically provided at both ends of the stirring rod, the inner wall of the fixed disk is fixedly connected to the outer surface of the stirring rod, fixed shafts are symmetrically provided on the opposite sides of the fixed disk, the outer surface of the fixed shaft is fixedly connected to the opposite side of the fixed disk, the outer surface of the fixed shaft is rotatably connected to a stirring plate, and a limiting block is provided on the opposite side of the stirring plate, and the outer surface of the limiting block is in contact with the opposite side of the stirring plate. During operation, the stirring plate drives the wastewater to rotate through the rotation of the connecting shaft, and at the same time, the wastewater is stirred more uniformly through the stirring wheel inside the stirring plate to ensure that the wastewater is heated evenly inside the treatment bin.

[0008] Furthermore, the cleaning mechanism includes a limiting cylinder, the inner wall of the limiting cylinder is slidingly connected to a cleaning plate, the bottom of the cleaning plate is symmetrically provided with a spring rod, the top of the spring rod is fixedly connected to the bottom of the cleaning plate, the outer surface of the cleaning plate is symmetrically provided with a path plate, the opposite sides of the path plate are slidingly connected to the outer surface of the cleaning plate, the outer surface of the connecting shaft is fixedly connected to the inner wall of the limiting cylinder, and the outer surface of the connecting shaft is fixedly connected to the inner wall of the fixed disk. During operation, the cleaning plate is driven to move by the rotation of the connecting shaft, and vibrates through the trajectory of the inner wall of the rotating ring. At the same time, the path plate clamps the cleaning plate during movement, so that the cleaning plate moves in a fixed path, and the wastewater crystals on the inner wall of the treatment bin are vibrated and cleaned.

[0009] A zero-discharge wastewater treatment method includes the following steps:

[0010] S1, stirring and heating, through the stirring mechanism, stirring and heating the wastewater in the treatment tank to crystallize the heavy metal pollutants in the wastewater;

[0011] S2, evaporation exhaust, by evaporating the waste water, the water vapor is discharged through the air guide cylinder in the air purification mechanism, the water vapor is condensed into water by cooling, and collected in the water collection tank;

[0012] S3. Gas purification: Through the purification mechanism, the gas passes through the clean gas chamber to fully react with the harmful gas, and then is discharged through the gas outlet.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. The present invention recovers and utilizes water vapor by setting up a gas purification mechanism, and at the same time separates harmful gases from water vapor, purifies the harmful gases separately, prevents the fusion of water vapor and chemicals, and reduces the concentration of chemicals to affect the purification effect.

[0015] 2. The present invention provides a scraper to scrape and clean the inner wall of the connecting inner disk to prevent crystals from clogging the connecting shaft, causing rotation obstruction and affecting the operation of the device.

[0016] 3. The present invention ensures that the wastewater is heated evenly inside the treatment chamber by providing a stirring blade mechanism, thereby preventing uneven heating that causes crystallization to be unable to react quickly and affects treatment efficiency.

[0017] 4. The present invention provides a cleaning plate to vibrate and clean the wastewater crystals on the inner wall of the treatment chamber to prevent excessive crystallization on the inner wall, which affects the heating effect. At the same time, if the crystals are not cleaned in time, the difficulty of subsequent treatment will increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the present invention;

[0019] Figure 2is a cross-sectional view of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the air purification mechanism of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the purification mechanism of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the stirring mechanism of the present invention;

[0023] Figure 6 This invention Figure 5 Enlarged schematic diagram of structure A;

[0024] Figure 7 This invention Figure 5 Enlarged schematic diagram of structure B;

[0025] Figure 8 This invention Figure 5 Enlarged schematic diagram of structure C;

[0026] Figure 9 It is a schematic diagram of the processing method of the present invention;

[0027] In the figure: 1. Support mechanism; 2. Air purification mechanism; 3. Stirring mechanism; 11. Bottom plate; 12. Support plate; 13. Processing chamber; 14. Support plate; 15. Support legs; 16. Motor; 17. Transmission shaft; 18. Gear plate; 19. Feed pipe; 21. Water collection chamber; 22. Connecting chamber; 23. Air guide cylinder; 24. Purification mechanism; 25. Cooling plate; 26. Air inlet cylinder; 241. Conduit; 242. Slide plate; 243. Air outlet cylinder; 244. Slide rod; 245. Top plate; 246. Air purification chamber; 247, rotor; 31, connecting plate; 32, scraper mechanism; 33, connecting ring; 34, rotating ring; 35, scraper rod; 36, stirring blade mechanism; 37, connecting shaft; 38, cleaning mechanism; 321, pressure rod; 322, fixed rod; 323, scraper; 361, fixed plate; 362, fixed shaft; 363, stirring wheel; 364, limiting block; 365, stirring rod; 366, stirring plate; 381, cleaning plate; 382, limiting cylinder; 383, path plate; 384, spring rod. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0029] Example 1, as Figure 1-Figure 4 As shown, a zero-emission wastewater treatment device includes a supporting mechanism 1, the inner wall of the supporting mechanism 1 is fixedly connected to a stirring mechanism 3, the top of the stirring mechanism 3 is fixedly connected to an air purification mechanism 2, the air purification mechanism 2 includes an air guide cylinder 23, the outer surface of the air guide cylinder 23 is fixedly connected to a water collecting bin 21, the inner wall of the air guide cylinder 23 is fixedly connected to an air inlet cylinder 26, the inner wall of the air guide cylinder 23 is fixedly connected to a cooling plate 25, the outer surface of the air guide cylinder 23 is fixedly connected to a connecting bin 22, and also includes a purification mechanism 24, including a slide plate 242 slidably connected to the inner wall of the connecting bin 22, the top of the slide plate 242 is fixedly connected to an air outlet cylinder 243, the inner wall of the air outlet cylinder 243 is slidably connected to a sliding rod 244, the outer surface of the sliding rod 244 is slidably connected to a top plate 245, the top of the top plate 245 is in contact with the inner wall of the air outlet cylinder 243, and the bottom of the sliding rod 244 is fixed to the bottom of the sliding rod 244. It is fixedly connected to a clean air bin 246, and a conduit 241 is symmetrically provided at the bottom of the clean air bin 246. The top of the conduit 241 is fixedly connected to the bottom of the clean air bin 246, and the inner wall of the conduit 241 is rotatably connected to a runner 247. The inner wall of the clean air bin 246 is fixedly connected to the outer surface of the air guide cylinder 23. During operation, the evaporated gas is introduced into the air guide cylinder 23 through the air inlet cylinder 26, and the water vapor is condensed and collected into the water collecting bin 21 through the cooling plate 25. The clean air bin 246 in the purification mechanism 24 is mixed with the agent to react and purify the harmful gas. At the same time, the accumulated pressure of the purified gas increases to push the top plate 245, and the gas is discharged through the air outlet cylinder 243 to recycle the water vapor. At the same time, the harmful gas is separated from the water vapor and purified separately to prevent the fusion of water vapor and the agent, and the concentration of the agent is reduced to affect the purification effect.

[0030] Example 2, based on Example 1, continue to refer to Figure 5-Figure 9 The support mechanism 1 includes a base plate 11, a support plate 12 is symmetrically arranged on the top of the base plate 11, the bottom of the support plate 12 is fixedly connected to the top of the base plate 11, the inner wall of the support plate 12 is rotatably connected to the processing chamber 13, the outer surface of the processing chamber 13 is symmetrically provided with a gear disk 18, the inner wall of the gear disk 18 is fixedly connected to the outer surface of the processing chamber 13, the outer surface of the gear disk 18 is meshed with a transmission shaft 17, the outer surface of the transmission shaft 17 is meshed with a motor 16, the bottom of the motor 16 is rotatably connected to the base plate 11 The top is fixedly connected, and a support plate 14 is symmetrically provided on the outer surface of the bottom plate 11. The inner wall of the support plate 14 is fixedly connected to the outer surface of the bottom plate 11. The top of the support plate 14 is fixedly connected with a support leg 15. The inner wall of the processing chamber 13 is fixedly connected with a feed pipe 19. During operation, the wastewater is flushed into the processing chamber 13 through the feed pipe 19, and the processing chamber 13 is driven to rotate by the rotation of the motor 16, so that the internal wastewater is fully heated and reacted, thereby preventing uneven heating caused by traditional heating methods and affecting the efficiency of wastewater treatment.

[0031] The stirring mechanism 3 includes a connecting shaft 37, the outer surface of the connecting shaft 37 is fixedly connected to the connecting disk 31, the inner wall of the connecting disk 31 is symmetrically provided with a scraping mechanism 32, the outer surface of the scraping mechanism 32 is fixedly connected to the inner wall of the connecting disk 31, the outer surface of the connecting shaft 37 is symmetrically provided with a stirring blade mechanism 36, the opposite side of the stirring blade mechanism 36 is fixedly connected to the outer surface of the connecting shaft 37, the outer surface of the connecting shaft 37 is symmetrically provided with a cleaning mechanism 38, the opposite side of the cleaning mechanism 38 is fixedly connected to the outer surface of the connecting shaft 37, the outer surface of the connecting shaft 37 is symmetrically provided with a scraping rod 35, the opposite side of the scraping rod 35 is fixedly connected to the outer surface of the connecting shaft 37, the outer surface of the connecting shaft 37 is fixedly connected to a swivel 34 at the center of the swivel The outer surface of 34 is fixedly connected to the connecting ring 33, and the scraper mechanism 32 includes a pressure rod 321, the inner wall of the pressure rod 321 is fixedly connected to the outer surface of the connecting disk 31, and the inner wall of the pressure rod 321 is provided with a scraper 323, the outer surface of the scraper 323 fits the inner wall of the pressure rod 321, and the inner wall of the scraper 323 is rotatably connected to the fixing rod 322, and the end of the fixing rod 322 away from the scraper 323 is fixedly connected to the inner wall of the connecting disk 31. During operation, by connecting the connecting disk 31 to the processing chamber 13, the connecting shaft 37 is rotated, which drives the scraper mechanism 32 to work, and the scraper 323 is used to scrape and clean the inner wall of the connecting inner disk to prevent crystallization from clogging the connecting shaft 37, causing the rotation to be obstructed and affecting the operation of the device.

[0032] The stirring blade mechanism 36 includes a stirring rod 365, the outer surface of which is rotatably connected to the stirring wheel 363, and fixed disks 361 are symmetrically provided at both ends of the stirring rod 365, the inner wall of the fixed disk 361 is fixedly connected to the outer surface of the stirring rod 365, and a fixed shaft 362 is symmetrically provided on the opposite side of the fixed disk 361, and the outer surface of the fixed shaft 362 is fixedly connected to the opposite side of the fixed disk 361, and the outer surface of the fixed shaft 362 is rotatably connected to a stirring plate 366, and a limiting block 364 is provided on the opposite side of the stirring plate 366, and the outer surface of the limiting block 364 is in contact with the opposite side of the stirring plate 366. During operation, the stirring plate 366 is driven to rotate by the rotation of the connecting shaft 37, and the stirring wheel 363 inside the stirring plate 366 is used to stir the wastewater in a more uniform manner, thereby ensuring that the wastewater is heated evenly inside the treatment bin 13, and preventing uneven heating, which causes crystallization to fail to react quickly and affects the treatment efficiency.

[0033] The cleaning mechanism 38 includes a limiting cylinder 382, the inner wall of the limiting cylinder 382 is slidably connected to the cleaning plate 381, the bottom of the cleaning plate 381 is symmetrically provided with a spring rod 384, the top of the spring rod 384 is fixedly connected to the bottom of the cleaning plate 381, and the outer surface of the cleaning plate 381 is symmetrically provided with a path plate 383, the opposite side of the path plate 383 is slidably connected to the outer surface of the cleaning plate 381, the outer surface of the connecting shaft 37 is fixedly connected to the inner wall of the limiting cylinder 382, and the outer surface of the connecting shaft 37 is fixedly connected to the inner wall of the fixed disk 361. During operation, the cleaning plate 381 is driven to move by the rotation of the connecting shaft 37, and at the same time vibrates through the trajectory of the inner wall of the rotating ring 34. At the same time, during the movement, the path plate 383 clamps the cleaning plate 381, so that the cleaning plate 381 moves in a fixed path, and vibrates and cleans the wastewater crystals on the inner wall of the processing bin 13 to prevent excessive crystallization of the inner wall, which affects the heating effect. At the same time, the crystals are not cleaned in time, which increases the difficulty of later processing.

[0034] A zero-discharge wastewater treatment method includes the following steps:

[0035] S1, stirring and heating, stirring and heating the wastewater in the treatment chamber 13 through the stirring mechanism 3, so that the heavy metal pollutants in the wastewater are crystallized;

[0036] S2, evaporation exhaust, by evaporating waste water, the water vapor is discharged through the air guide cylinder 23 in the air purification mechanism 2, the water vapor is condensed into water by cooling, and collected in the water collection tank 21;

[0037] S3, gas purification, through the purification mechanism 24, the gas passes through the clean gas warehouse 246 to fully react with the harmful gas, and then is discharged through the gas outlet 243.

[0038] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A zero-emission wastewater treatment device, comprising a support mechanism (1), wherein the inner wall of the support mechanism (1) is fixedly connected to a stirring mechanism (3), the top of the stirring mechanism (3) is fixedly connected to a purification mechanism (2), the purification mechanism (2) comprises an air guide cylinder (23), the outer surface of the air guide cylinder (23) is fixedly connected to a water collection bin (21), the inner wall of the air guide cylinder (23) is fixedly connected to an air inlet cylinder (26), the inner wall of the air guide cylinder (23) is fixedly connected to a cooling plate (25), and the outer surface of the air guide cylinder (23) is fixedly connected to a connecting bin (22), characterized in that: Also includes; The purification mechanism (24) comprises a slide plate (242) slidably connected to the inner wall of the connection chamber (22), the top of the slide plate (242) is fixedly connected to the air outlet cylinder (243), the inner wall of the air outlet cylinder (243) is slidably connected to a slide rod (244), the outer surface of the slide rod (244) is slidably connected to a top plate (245), the top of the top plate (245) is in contact with the inner wall of the air outlet cylinder (243), the bottom of the slide rod (244) is fixedly connected to the air purification chamber (246), the bottom of the air purification chamber (246) is symmetrically provided with a conduit (241), the top of the conduit (241) is fixedly connected to the bottom of the air purification chamber (246), the inner wall of the conduit (241) is rotatably connected to a runner (247), and the inner wall of the air purification chamber (246) is fixedly connected to the outer surface of the air guide cylinder (23); The stirring mechanism (3) comprises a connecting shaft (37), the outer surface of the connecting shaft (37) is fixedly connected to a connecting disk (31), the inner wall of the connecting disk (31) is symmetrically provided with a scraping mechanism (32), the outer surface of the scraping mechanism (32) is fixedly connected to the inner wall of the connecting disk (31), the outer surface of the connecting shaft (37) is symmetrically provided with a stirring blade mechanism (36), the opposite side of the stirring blade mechanism (36) is fixedly connected to the outer surface of the connecting shaft (37), the outer surface of the connecting shaft (37) is symmetrically provided with a cleaning mechanism (38), the opposite side of the cleaning mechanism (38) is fixedly connected to the outer surface of the connecting shaft (37), the outer surface of the connecting shaft (37) is symmetrically provided with a scraping rod (35), the opposite side of the scraping rod (35) is fixedly connected to the outer surface of the connecting shaft (37), the center of the outer surface of the connecting shaft (37) is fixedly connected to a rotating ring (34), and the outer surface of the rotating ring (34) is fixedly connected to a connecting ring (33); The scraper mechanism (32) includes a pressure rod (321), the inner wall of the pressure rod (321) is fixedly connected to the outer surface of the connecting disk (31), the inner wall of the pressure rod (321) is provided with a scraper (323), the outer surface of the scraper (323) is in contact with the inner wall of the pressure rod (321), the inner wall of the scraper (323) is rotatably connected to a fixing rod (322), and the end of the fixing rod (322) away from the scraper (323) is fixedly connected to the inner wall of the connecting disk (31).

2. A zero-discharge wastewater treatment device according to claim 1, characterized in that: The support mechanism (1) comprises a base plate (11), a support plate (12) is symmetrically arranged on the top of the base plate (11), the bottom of the support plate (12) is fixedly connected to the top of the base plate (11), the inner wall of the support plate (12) is rotatably connected to the processing chamber (13), the outer surface of the processing chamber (13) is symmetrically provided with a toothed disc (18), the inner wall of the toothed disc (18) is fixedly connected to the outer surface of the processing chamber (13), the outer surface gear of the toothed disc (18) is meshed with a transmission shaft (17), the outer surface gear of the transmission shaft (17) is meshed with a motor (16), the bottom of the motor (16) is fixedly connected to the top of the base plate (11), a support disc (14) is symmetrically arranged on the outer surface of the base plate (11), the inner wall of the support disc (14) is fixedly connected to the outer surface of the base plate (11), the top of the support disc (14) is fixedly connected to a leg (15), and the inner wall of the processing chamber (13) is fixedly connected to a feed pipe (19).

3. A zero-discharge wastewater treatment device according to claim 2, characterized in that: The stirring blade mechanism (36) comprises a stirring rod (365), the outer surface of which is rotatably connected to a stirring wheel (363), fixed disks (361) symmetrically provided at both ends of the stirring rod (365), the inner wall of which is fixedly connected to the outer surface of the stirring rod (365), a fixed shaft (362) symmetrically provided on the opposite side of the fixed disk (361), the outer surface of which is fixedly connected to the opposite side of the fixed disk (361), a stirring plate (366) rotatably connected to the outer surface of the fixed shaft (362), a limiting block (364) provided on the opposite side of the stirring plate (366), the outer surface of which is in contact with the opposite side of the stirring plate (366).

4. A zero-discharge wastewater treatment device according to claim 3, characterized in that: The cleaning mechanism (38) includes a limiting cylinder (382), the inner wall of the limiting cylinder (382) is slidably connected to a cleaning plate (381), the bottom of the cleaning plate (381) is symmetrically provided with a spring rod (384), the top of the spring rod (384) is fixedly connected to the bottom of the cleaning plate (381), and the outer surface of the cleaning plate (381) is symmetrically provided with a path plate (383), and the opposite side of the path plate (383) is slidably connected to the outer surface of the cleaning plate (381).

5. The zero-discharge wastewater treatment device according to claim 3, characterized in that: The outer surface of the connecting shaft (37) is fixedly connected to the inner wall of the limiting cylinder (382), and the outer surface of the connecting shaft (37) is fixedly connected to the inner wall of the fixed disk (361).

6. A zero-discharge wastewater treatment method according to any one of claims 2 to 5, characterized in that: It includes the following steps: S1, stirring and heating, stirring and heating the wastewater in the treatment chamber (13) through the stirring mechanism (3), so that the heavy metal pollutants in the wastewater are crystallized; S2, evaporation exhaust, by evaporating waste water, the water vapor is discharged through the air guide cylinder (23) in the air purification mechanism (2), the water vapor is condensed into water by cooling, and collected in the water collection tank (21); S3, gas purification, through the purification mechanism (24), the gas passes through the clean gas bin (246) to fully react with the harmful gas, and then is discharged through the gas outlet (243).

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