An industrial wastewater auxiliary treatment device and treatment method for industrial parks

Abstract

The present invention relates to the technical field of wastewater treatment, and discloses an industrial wastewater auxiliary treatment device and a treatment method for a park. Among them, an industrial wastewater auxiliary treatment device for a park includes a bench, a housing cover arranged on the top of the bench, a low-temperature evaporator arranged inside the housing cover, a water injection device arranged on the inner side of the housing cover, a water injection pipe arranged between the water injection device and the low-temperature evaporator, a condenser arranged on the top of the housing cover, and a power device arranged on the side of the low-temperature evaporator. For this industrial wastewater auxiliary treatment device for a park, by setting a low-temperature evaporator, after the wastewater enters the evaporation cylinder, the rotating shaft drives the scraper to rotate, and the scraper continuously turns over the wastewater and splashes and coats the wastewater on the inner wall of the evaporation cylinder. In this way, the heat dissipated from the inner wall of the evaporation cylinder can be more fully utilized, increasing the heat absorption speed of the wastewater, enabling it to evaporate quickly, effectively improving the wastewater treatment speed, and reducing energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and particularly relates to an industrial wastewater auxiliary treatment device and a treatment method for industrial parks. Background Art

[0002] Industrial wastewater refers to the wastewater generated during industrial production processes. In industrial parks, industrial wastewater comes from various different factories, such as the chemical, electroplating, printing and dyeing, pharmaceutical and other industries. Different types of wastewater require different treatment methods and corresponding treatment equipment to specifically purify the wastewater and make it meet the safety discharge standards.

[0003] The treatment methods of wastewater generally include physical treatment methods, chemical treatment methods and biological treatment methods. The low-temperature evaporator belongs to one of the equipment corresponding to the physical treatment method. It mainly creates a vacuum environment and utilizes the characteristic that the boiling point of water decreases as the pressure decreases. At a relatively low temperature, the wastewater is evaporated by heating to separate water from the wastewater, thereby realizing the concentration and reduction treatment of the wastewater. In this way, the wastewater is evaporated at a relatively low temperature, avoiding the influence of high temperature on some pollutants or equipment materials that are easily thermally decomposed.

[0004] A wastewater heat pump type low-temperature evaporator is disclosed in the patent with the patent publication number CN112093836A, which solves the disadvantages existing in the prior art. It includes a demister, a first heat exchanger, a second heat exchanger and a condensate water circulation barrel. A Teflon plate is fixedly connected to the bottom of the demister, and an antifoaming device is installed on the top of the Teflon plate. The antifoaming device is located inside the demister. One side of the demister is fixedly connected to a steam pipeline through a flange. The advantages of the evaporator in this invention patent are small floor area, simple operation process, and relatively high degree of automation of the equipment. The evaporation temperature of water is only in the 30s. At this temperature, it is not easy to scale inside the evaporator, greatly reducing the maintenance cost of the equipment. And during the low-temperature evaporation of water, organic substances are not easily volatilized, making the effluent water quality higher. It can not only improve the compactness of the water treatment equipment, but also greatly reduce the energy consumption of the water treatment equipment.

[0005] The prior art has the following defects:

[0006] Although the low-temperature evaporator has certain excellent characteristics, the method of heating to evaporate the water vapor in the wastewater will cause a large energy consumption of the equipment, and the evaporation rate of the wastewater is slow. Compared with methods such as physical filtration and chemical neutralization, the efficiency is lower, and the economic benefits generated are also lower. As a result, the low-temperature evaporator can only be used in some special occasions and is not conducive to large-scale popularization. Summary of the Invention

[0007] In view of the problems of high consumption and low efficiency in the existing technology, an industrial wastewater auxiliary treatment device and treatment method for industrial parks are proposed.

[0008] This application provides an industrial wastewater auxiliary treatment device and treatment method for industrial parks, aiming to: reduce consumption and improve efficiency.

[0009] The technical solution of the present invention is: an industrial wastewater auxiliary treatment device for industrial parks, including a bench, a housing cover arranged on the top of the bench, a low-temperature evaporator arranged inside the housing cover, a water injection device arranged on the inner side of the housing cover, a water injection pipe arranged between the water injection device and the low-temperature evaporator, a condenser arranged on the top of the housing cover, a power device arranged on the side of the low-temperature evaporator. The low-temperature evaporator specifically includes an evaporation cylinder arranged on the inner side of the housing cover, a sealing cover arranged at the opening of the evaporation cylinder, a rotating shaft arranged inside the evaporation cylinder, a rotating gear and a joint pipe arranged on the outer side of the rotating shaft, an extension rod arranged inside the joint pipe, a scraper arranged at one end of the extension rod away from the joint pipe, a rotating chute opened on the outer side of the extension rod, and a limit bolt arranged on the outer side of the joint pipe;

[0010] The rotating shaft penetrates through the sealing cover and extends into the power device. The rotating gear is located at one end of the rotating shaft extending out of the evaporation cylinder. The joint pipe is communicated with the internal space of the rotating shaft. There are multiple groups of joint pipes, which are arranged in a linear array on the outer side of the rotating shaft. The joint pipes in the same group are distributed in a circular array on the outer side of the rotating shaft. The extension rod extends towards the inner wall of the evaporation cylinder, and the limit bolt is inserted into the rotating chute.

[0011] Further, a heating wire is spirally wound inside the barrel wall of the evaporation cylinder.

[0012] Further, the low-temperature evaporator further includes an adjustment slide rod arranged at one end of the extension rod close to the rotating shaft, an inner shaft arranged inside the rotating shaft, an adjustment chute opened on the outer side of the inner shaft, and a water absorption pad arranged at one end of the inner shaft away from the rotating gear;

[0013] The extension rod extends into the rotating shaft, the adjustment slide rod extends into the adjustment chute. The rotating chute is circular, and the adjustment chutes are arranged in a linear array. The adjustment chutes are circular and surround the outer side of the inner shaft. The adjustment chutes are divided into three sections A, B, and C. Among them, section A and section B are arranged in parallel, and section C is connected between the two ends of section A and section B. The distance between section A and section B is the same as the distance from the central axis of the adjustment slide rod to the central axis of the extension rod. The water absorption pad is fixed on the outer side of the housing cover.

[0014] Further, section A of the adjustment chute is located at the central axis of the extension rod, section A of the adjustment chute is located below the adjustment chute, and section B of the adjustment chute is located above the adjustment chute.

[0015] Further, a fixed sleeve is fixedly connected to the side of the scraping plate away from the extension rod.

[0016] Further, the scraping plate includes a plate body disposed at one end of the extension rod away from the rotating shaft, an inner groove opened on the surface of the plate body, a buckle plate disposed at the opening of the inner groove, a storage groove opened at one end of the plate body close to the water absorption pad, a through hole disposed between the storage groove and the inner groove, a pressing plate disposed inside the storage groove, a buoyancy block disposed inside the inner groove, and a connecting rod disposed between the buoyancy block and the pressing plate;

[0017] The inner groove is filled with a filling liquid, the material density of the buoyancy block is less than the density of the filling liquid, a communication groove is opened on the surface of the buoyancy block, and the pressing plate is attached to the outside of the water absorption pad.

[0018] Further, the scraping plate further includes a guiding groove opened on the inner wall of the inner groove, and a guiding rod disposed on the side of the buoyancy block away from the connecting rod;

[0019] The guiding groove is concentric with the through hole, the guiding rod is slidably inserted into the guiding groove, and the guiding rod and the connecting rod have the same diameter.

[0020] Further, a metal wire is sewn on the side of the water absorption pad close to the inner wall of the evaporation cylinder.

[0021] An industrial wastewater auxiliary treatment method for a park, using the above-mentioned industrial wastewater auxiliary treatment device for a park, includes the following steps:

[0022] Step 1: Impurity filtration. First, the wastewater is introduced into the filtration equipment. After filtering out the solid particles and fibers that may be contained in the wastewater by the filtration equipment, the wastewater is discharged. In this way, these impurities can be prevented from entering the low-temperature evaporator and blocking the pipeline or affecting the heat exchange efficiency of the evaporator;

[0023] Step 2: pH value adjustment. An acidic substance or a basic substance is added to the sewage to adjust the pH value of the wastewater to be within a neutral range. In this way, the low-temperature evaporator is prevented from being corroded by wastewater with too strong acidity or alkalinity;

[0024] Step 3: Low-temperature evaporation. The wastewater is introduced into the low-temperature evaporator by the water injection equipment and the water injection pipe. After injecting the wastewater until it reaches one-third of the volume inside the low-temperature evaporator, the injection stops. Subsequently, a vacuum environment is created inside the low-temperature evaporator, and heating is started. The rotating shaft drives the scraping plate to stir the wastewater to evaporate the wastewater. When one-third of the wastewater has evaporated, water is injected again;

[0025] Step 4: Condensation. The water vapor evaporated inside the low-temperature evaporator is introduced into the condenser. After condensation, condensed water is generated, and the condensed water is discharged;

[0026] Step 5: Sewage discharge. After all the wastewater has been processed, a small amount of concentrated liquid will remain in the low-temperature evaporator. The concentrated liquid is discharged and collected.

[0027] Advantages of the present invention:

[0028] 1. By setting a low-temperature evaporator, after the wastewater enters the evaporation cylinder, the rotating shaft drives the scraper to rotate. The scraper continuously turns over the wastewater and splashes and coats the wastewater on the inner wall of the evaporation cylinder. In this way, the heat dissipated from the inner wall of the evaporation cylinder is more fully utilized, increasing the heat absorption speed of the wastewater, enabling it to evaporate quickly, effectively improving the wastewater treatment speed, reducing energy consumption, and obtaining greater economic benefits.

[0029] 2. By setting an inner shaft, when the rotating shaft drives the scraper to rotate, the extension rod rotates around the inner shaft, adjusting the sliding rod to slide in the adjustment chute. Before the scraper enters the wastewater, the sliding rod enters section A of the adjustment chute, and the scraper deflects to a state perpendicular to the central axis of the rotating shaft. In this way, during the movement of the scraper in the wastewater, the resistance received by the scraper can be reduced, lowering the material and process requirements of the overall equipment, reducing kinetic energy consumption, and making the working state more stable. When the scraper is about to leave the wastewater, the sliding rod enters section B of the adjustment chute, and the scraper deflects to a state parallel to the central axis of the rotating shaft. In this way, the scraper can turn up the wastewater to the greatest extent, improving the evaporation efficiency.

[0030] 3. By setting a water absorption pad, when the fixed sleeve enters the wastewater, it will absorb part of the wastewater. When rotating with the scraper, it can smear the wastewater on the surface of the inner wall of the evaporation cylinder, making its dispersion effect on the wastewater better and having a larger contact area with the inner wall of the evaporation cylinder, further improving the evaporation efficiency.

[0031] 4. By setting a scraper, after the plate body leaves the wastewater, the water absorption pad smears the absorbed wastewater on the inner wall of the evaporation cylinder. When the plate body moves above the central axis of the rotating shaft, the buoyancy block drives the pressing plate to approach the water absorption pad under the buoyancy of the filling liquid. The wastewater absorbed by the water absorption pad is continuously squeezed out during the movement. In this way, the dispersion effect of the wastewater is further improved, making its smearing process uniform and having a higher heat absorption efficiency. Description of the drawings

[0032] Figure 1 It is a three-dimensional view of the industrial wastewater auxiliary treatment device for the park of the present invention;

[0033] Figure 2 It is a schematic diagram of the interior of the housing of the present invention;

[0034] Figure 3 It is a schematic diagram of the evaporator of the present invention;

[0035] Figure 4 It is a disassembled schematic diagram of the evaporator of the present invention;

[0036] Figure 5 For the present invention Figure 4 Schematic diagram after the perspective is flipped

[0037] Figure 6 Schematic diagram of the rotating shaft of the present invention;

[0038] Figure 7 Schematic diagram of the inner shaft of the present invention and the inner shaft after being flattened along the circumferential direction;

[0039] Figure 8 Schematic diagram of the scraper of the present invention;

[0040] Figure 9 Internal schematic diagram of the scraper of the present invention;

[0041] Figure 10 Disassembly diagram of the scraper of the present invention;

[0042] Figure 11 Top view of the evaporator of the present invention;

[0043] Figure 12 For the present invention Figure 11 Cross-sectional view taken along D-D in;

[0044] Figure 13 For the present invention Figure 11 Cross-sectional view taken along E-E in;

[0045] Figure 14 For the present invention Figure 13 Schematic diagram of the extension rod and the scraper in;

[0046] Figure 15 For the present invention Figure 14 Enlarged view at F in;

[0047] Figure 16 For the present invention Figure 14 Schematic diagram of the scraper in.

[0048] In the figure:

[0049] 1, bench; 2, housing cover; 3, low-temperature evaporator; 31, evaporation cylinder; 32, sealing cover; 33, rotating shaft; 34, rotating gear; 35, connecting pipe; 36, extension rod; 37, scraper; 371, plate body; 372, inner groove; 373, buckle plate; 374, storage groove; 375, through hole; 376, pressing plate; 377, buoyancy block; 378, connecting rod; 379, guiding groove; 3710, guiding rod; 38, rotating sliding groove; 39, limiting bolt; 310, adjusting sliding rod; 311, inner shaft; 312, adjusting sliding groove; 313, fixed sleeve; 314, water absorption pad; 4, water injection device; 5, water injection pipe; 6, condenser; 7, power device. Detailed implementation manners

[0050] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following provides a detailed description of the specific embodiments of the present invention with reference to the accompanying drawings of the specification.

[0051] Embodiment 1

[0052] Referring to Figures 1 - 16 , which is the first embodiment of the present invention, a device for assisting in the treatment of industrial wastewater in a park is provided, including a bench 1, a housing cover 2 provided on the top of the bench 1, a low-temperature evaporator 3 provided inside the housing cover 2, a water injection device 4 provided on the inner side of the housing cover 2, a water injection pipe 5 provided between the water injection device 4 and the low-temperature evaporator 3, a condenser 6 provided on the top of the housing cover 2, a power device 7 provided on the side of the low-temperature evaporator 3. Specifically, the low-temperature evaporator 3 includes an evaporation cylinder 31 provided on the inner side of the housing cover 2, a sealing cover 32 provided at the opening of the evaporation cylinder 31, a rotating shaft 33 provided inside the evaporation cylinder 31, a rotating gear 34 and a joint pipe 35 provided on the outer side of the rotating shaft 33, an extension rod 36 provided inside the joint pipe 35, a scraper 37 provided at the end of the extension rod 36 away from the joint pipe 35, a rotating chute 38 provided on the outer side of the extension rod 36, and a limit bolt 39 provided on the outer side of the joint pipe 35.

[0053] Specifically, the housing cover 2 is fixed to the bench 1 by bolts, the low-temperature evaporator 3 is fixed to the housing cover 2 by bolts, the water injection device 4 is fixed to the bench 1 by bolts, the water injection device 4 is connected to a wastewater tank through a pipeline, the condenser 6 is fixed to the housing cover 2 by bolts, the power device 7 is fixed to the low-temperature evaporator 3 by bolts, the low-temperature evaporator 3 is communicated with the condenser 6 through a pipeline, a sewage pipe is provided on the side of the low-temperature evaporator 3, a drain pipe is provided on the side of the condenser 6, and the low-temperature evaporator 3 is externally connected to a vacuum pumping device; the evaporation cylinder 31 and the sealing cover 32 are fixed by bolts, the rotating shaft 33 penetrates through the sealing cover 32 and extends into the power device 7, the rotating gear 34 is located at one end of the rotating shaft 33 extending out of the evaporation cylinder 31, the rotating gear 34 is located inside the power device 7, the joint pipe 35 is welded to the rotating shaft 33, the joint pipe 35 is communicated with the internal space of the rotating shaft 33, multiple groups of joint pipes 35 are provided and are arranged in a linear array on the outer side of the rotating shaft 33, the joint pipes 35 in the same group are distributed in a circular array on the outer side of the rotating shaft 33, the extension rod 36 extends towards the inner wall of the evaporation cylinder 31, the scraper 37 is fixed to the extension rod 36 by bolts, the limit bolt 39 is inserted into the rotating chute 38, the limit bolt 39 penetrates through the surface of the joint pipe 35 and is fixed by threads, a heating wire is spirally wound inside the barrel wall of the evaporation cylinder 31, and the wastewater storage volume in the evaporation cylinder 31 does not exceed one-third of the total volume.

[0054] By setting up the low-temperature evaporator 3, after the wastewater enters the evaporation cylinder 31, the rotating shaft 33 drives the scraper 37 to rotate. The scraper 37 continuously turns over the wastewater and splashes and coats the wastewater on the inner wall of the evaporation cylinder 31. In this way, the heat dissipated from the inner wall of the evaporation cylinder 31 can be utilized more fully, increasing the heat absorption speed of the wastewater, enabling it to evaporate quickly, effectively improving the wastewater treatment speed, reducing energy consumption, and achieving greater economic benefits.

[0055] The low-temperature evaporator 3 further includes an adjusting slide rod 310 arranged at one end of the extension rod 36 close to the rotating shaft 33, an inner shaft 311 arranged inside the rotating shaft 33, an adjusting chute 312 opened on the outer side of the inner shaft 311, and a water absorption pad 314 arranged at one end of the inner shaft 311 away from the rotating gear 34.

[0056] Specifically, the adjusting slide rod 310 is welded to the extension rod 36. The extension rod 36 extends into the rotating shaft 33, and the adjusting slide rod 310 extends into the adjusting chute 312. The rotating chute 38 is annular, and the adjusting chute 312 is distributed in a linear array. The adjusting chute 312 is annular and surrounds the outer side of the inner shaft 311. The adjusting chute 312 is divided into three sections A, B, and C. Among them, section A and section B are arranged in parallel, and section C is connected between the two ends of section A and section B. The distance between section A and section B is the same as the distance from the central axis of the adjusting slide rod 310 to the central axis of the extension rod 36. The water absorption pad 314 is fixed on the outer side of the housing 2. Section A of the adjusting chute 312 is located at the central axis of the extension rod 36. Section A of the adjusting chute 312 is located below the adjusting chute 312, and section B of the adjusting chute 312 is located above the adjusting chute 312. On the side of the scraper 37 away from the extension rod 36, a fixed sleeve 313 is fixedly connected. The fixed sleeve 313 is fixedly connected to the housing 2. The inner shaft 311 is rotatably connected inside the rotating shaft 33, and the water absorption pad 314 is fixed to the scraper 37 by screws.

[0057] By setting up the inner shaft 311, when the rotating shaft 33 drives the scraper 37 to rotate, the extension rod 36 rotates around the inner shaft 311, and the adjusting slide rod 310 slides in the adjusting chute 312. Before the scraper 37 enters the wastewater, the adjusting slide rod 310 enters section A of the adjusting chute 312, and the scraper 37 deflects to a state perpendicular to the central axis of the rotating shaft 33. In this way, during the movement of the scraper 37 in the wastewater, the resistance received by the scraper 37 can be reduced, lowering the material and process requirements of the overall equipment, reducing kinetic energy consumption, and making the working state more stable. When the scraper 37 is about to leave the wastewater, the adjusting slide rod 310 enters section B of the adjusting chute 312, and the scraper 37 deflects to a state parallel to the central axis of the rotating shaft 33. In this way, the scraper 37 can turn up the wastewater to the greatest extent, improving the evaporation efficiency.

[0058] By setting the water absorption pad 314, when the fixing sleeve 313 enters the wastewater, it will absorb part of the wastewater. When rotating with the scraper 37, it can smear the wastewater on the inner wall surface of the evaporation cylinder 31, making the dispersion effect of the wastewater better and having a larger contact area with the inner wall of the evaporation cylinder 31, further improving the evaporation efficiency.

[0059] The scraper 37 includes a plate body 371 provided at one end of the extension rod 36 away from the rotating shaft 33, an inner groove 372 opened on the surface of the plate body 371, a buckle plate 373 provided at the opening of the inner groove 372, a storage groove 374 opened at one end of the plate body 371 close to the water absorption pad 314, a through hole 375 provided between the storage groove 374 and the inner groove 372, a pressing plate 376 provided inside the storage groove 374, a buoyancy block 377 provided inside the inner groove 372, and a connecting rod 378 provided between the buoyancy block 377 and the pressing plate 376; the scraper 37 further includes a guiding groove 379 opened on the inner wall of the inner groove 372 and a guiding rod 3710 provided on the side of the buoyancy block 377 away from the connecting rod 378.

[0060] Specifically, the buckle plate 373 is fixed to the plate body 371 by bolts. The inner groove 372 is filled with a filling liquid. The material density of the buoyancy block 377 is less than the density of the filling liquid. The through holes 375 are distributed in a linear array. Communication grooves are opened on the surface of the buoyancy block 377. The pressing plate 376 is attached to the outside of the water absorption pad 314; the guiding groove 379 is concentric with the through hole 375. The guiding rod 3710 is slidably inserted into the guiding groove 379. The guiding rod 3710 and the connecting rod 378 have the same diameter. Both the connecting rod 378 and the guiding rod 3710 are fixedly connected to the buoyancy block 377. The pressing plate 376 is fixed to the connecting rod 378 by bolts. The guiding groove 379 extends to the surface of the plate body 371. Sealing rings are provided in both the guiding groove 379 and the through hole 375.

[0061] By setting the scraper 37, when the plate body 371 leaves the wastewater, the water absorption pad 314 smears the absorbed wastewater on the inner wall of the evaporation cylinder 31. When the plate body 371 moves above the central axis of the rotating shaft 33, under the buoyancy action of the filling liquid, the buoyancy block 377 drives the pressing plate 376 to approach the water absorption pad 314. The wastewater absorbed by the water absorption pad 314 is continuously squeezed out during the movement, further improving the dispersion effect of the wastewater, making the smearing process uniform and having a higher heat absorption efficiency. At the same time, the guiding rod 3710 and the connecting rod 378 move synchronously. The length by which the connecting rod 378 moves out of the inner groove 372 is the same as the length by which the guiding rod 3710 enters the inner groove 372, so as to balance the pressure inside the inner groove 372 and maintain the stable operation of the equipment.

[0062] Specifically, a metal wire is sewn on one side of the absorbent pad 314 close to the inner wall of the evaporator tube 31, so that when the scraper 37 rotates in the evaporator tube 31, the metal wire can scrape the inner wall of the evaporator tube 31, which can effectively remove the attachments on the inner wall of the evaporator tube 31 and ensure the efficiency of heat conduction.

[0063] Example 2

[0064] As a second embodiment of the present invention, there is provided: an auxiliary treatment method for industrial wastewater in a park, using the auxiliary treatment device for industrial wastewater in a park, comprising the following steps:

[0065] Step 1: Impurity filtration, firstly, the wastewater is introduced into the filtering equipment, and the solid particles and fibers that may be contained in the wastewater are filtered out by the filtering equipment, and then the wastewater is discharged; in this way, these impurities can be prevented from entering the low-temperature evaporator 3, clogging the pipeline or affecting the heat exchange efficiency of the low-temperature evaporator 3;

[0066] Step 2: Adjusting the pH value, adding acidic or alkaline substances to the sewage to adjust the pH value of the wastewater to a neutral range; this prevents the acidic or alkaline wastewater from corroding the low-temperature evaporator 3;

[0067] Step 3: Low-temperature evaporation, using the water injection device 4 and the water injection pipe 5 to introduce the wastewater into the low-temperature evaporator 3, and stop injecting the wastewater when it reaches one-third of the internal volume of the low-temperature evaporator 3, then create a vacuum environment in the low-temperature evaporator 3, and start heating, the rotating shaft 33 drives the scraper 37 to turn the wastewater to evaporate the wastewater, and when one-third of the wastewater evaporates, water is injected again;

[0068] Step 4: Condensation, the water vapor evaporated in the low-temperature evaporator 3 is introduced into the condenser 6, and condensed water is generated after condensation, and the condensed water is discharged;

[0069] Step 5: Draining sewage. After all the wastewater is discharged, a small amount of concentrated liquid will remain in the low-temperature evaporator 3, and the concentrated liquid will be discharged and collected.

[0070] The working principle of the industrial wastewater auxiliary treatment device used in the park of the present invention is as follows:

[0071] When in use, the waste water is introduced into the low-temperature evaporator 3 by means of the water injection device 4 and the water injection pipe 5. The injection of waste water stops when it reaches one third of the internal volume of the low-temperature evaporator 3. Subsequently, a vacuum environment is created in the low-temperature evaporator 3, and the inner wall of the evaporation tube 31 is heated by means of a heating wire. The waste water in the evaporation tube 31 begins to evaporate when heated to 30-50°C under a low-pressure environment, and the water vapor flows into the condenser 6 and is discharged after being cooled to form condensed water.

[0072] Start the power device 7. The power device 7 drives the rotating shaft 33 to rotate by rotating the gear 34. The rotating shaft 33 drives the scraper 37 to rotate through the joint pipe 35 and the extension rod 36. During this process, the extension rod 36 rotates around the inner shaft 311, and the adjusting slide rod 310 slides in the adjusting chute 312. Before the scraper 37 enters the wastewater, the adjusting slide rod 310 slides into the A section of the adjusting chute 312. At this time, the central axes of the adjusting slide rod 310 and the extension rod 36 are in the same vertical plane (refer to Figure 11 the cutting plane D-D in

[0073] ), and the scraper 37 deflects to a state perpendicular to the central axis of the rotating shaft 33. The scraper 37 enters the wastewater and sweeps through the wastewater. When the scraper 37 is about to leave the wastewater, the adjusting slide rod 310 slides into the B section of the adjusting chute 312. At this time, the central axes of the adjusting slide rod 310 and the extension rod 36 are in the same horizontal plane (i.e., the plane coinciding with the central axis of the rotating shaft 33), and the scraper 37 deflects to a state parallel to the central axis of the rotating shaft 33. The scraper 37 leaves the wastewater and raises the wastewater.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An industrial wastewater auxiliary treatment device for a park, comprising a bench (1), a housing cover (2) arranged on the top of the bench (1), a low-temperature evaporator (3) arranged inside the housing cover (2), a water injection device (4) arranged on the inner side of the housing cover (2), a water injection pipe (5) arranged between the water injection device (4) and the low-temperature evaporator (3), a condenser (6) arranged on the top of the housing cover (2), and a power device (7) arranged on the side of the low-temperature evaporator (3), characterized in that: The low-temperature evaporator (3) specifically includes an evaporation cylinder (31) disposed inside the housing cover (2), a sealing cover (32) disposed at the opening of the evaporation cylinder (31), a rotating shaft (33) disposed inside the evaporation cylinder (31), a rotating gear (34) and a connection pipe (35) disposed outside the rotating shaft (33), an extension rod (36) disposed inside the connection pipe (35), a scraping plate (37) disposed at one end of the extension rod (36) away from the connection pipe (35), a rotating chute (38) opened on the outside of the extension rod (36), and a limit bolt (39) disposed outside the connection pipe (35); The rotating shaft (33) penetrates through the sealing cover (32) and extends into the power device (7). The rotating gear (34) is located at one end of the rotating shaft (33) extending out of the evaporation cylinder (31). The connection pipe (35) is communicated with the internal space of the rotating shaft (33). There are multiple groups of connection pipes (35), which are arranged in a linear array on the outside of the rotating shaft (33). The connection pipes (35) in the same group are distributed in a circular array on the outside of the rotating shaft (33). The extension rod (36) extends towards the inner wall of the evaporation cylinder (31), and the limit bolt (39) is inserted into the rotating chute (38); The low-temperature evaporator (3) further includes an adjusting slide rod (310) disposed at one end of the extension rod (36) close to the rotating shaft (33), an inner shaft (311) disposed inside the rotating shaft (33), an adjusting chute (312) opened on the outside of the inner shaft (311), and a water absorption pad (314) disposed at one end of the inner shaft (311) away from the rotating gear (34); The extension rod (36) extends into the rotating shaft (33), the adjusting slide rod (310) extends into the adjusting chute (312), the rotating chute (38) is circular, the adjusting chutes (312) are distributed in a linear array, the adjusting chutes (312) are circular and surround the outside of the inner shaft (311). The adjusting chute (312) is divided into three sections A, B, and C. Among them, section A and section B are arranged in parallel, and section C is connected between the two ends of section A and section B. The distance between section A and section B is the same as the distance from the central axis of the adjusting slide rod (310) to the central axis of the extension rod (36). The water absorption pad (314) is fixed on the outside of the housing cover (2); The wastewater storage volume in the evaporation cylinder (31) does not exceed one-third of the total volume. Section A of the adjusting chute (312) is located at the central axis of the extension rod (36). Section A of the adjusting chute (312) is located below the adjusting chute (312), and section B of the adjusting chute (312) is located above the adjusting chute (312). Before the scraping plate (37) enters the wastewater, the adjusting slide rod (310) enters section A of the adjusting chute (312), and the scraping plate (37) deflects to a state perpendicular to the central axis of the rotating shaft (33). When the scraping plate (37) is about to leave the wastewater, the adjusting slide rod (310) enters section B of the adjusting chute (312), and the scraping plate (37) deflects to a state parallel to the central axis of the rotating shaft (33).

2. The industrial wastewater auxiliary treatment device for a park according to claim 1, wherein: A heating wire is spirally wound inside the cylinder wall of the evaporation cylinder (31).

3. The industrial wastewater auxiliary treatment device for a park according to claim 2, wherein: One side of the scraper (37) away from the extension rod (36) is fixedly connected with a fixed sleeve (313).

4. The industrial wastewater auxiliary treatment device for a park according to claim 3, wherein: The scraper (37) includes a plate body (371) arranged at one end of the extension rod (36) away from the rotating shaft (33), an inner groove (372) opened on the surface of the plate body (371), a buckle plate (373) arranged at the opening of the inner groove (372), a storage groove (374) opened at one end of the plate body (371) close to the water absorption pad (314), a through hole (375) arranged between the storage groove (374) and the inner groove (372), a pressing plate (376) arranged inside the storage groove (374), a buoyancy block (377) arranged inside the inner groove (372), and a connecting rod (378) arranged between the buoyancy block (377) and the pressing plate (376); The inner groove (372) is filled with a filling liquid. The material density of the buoyancy block (377) is less than the density of the filling liquid. A communication groove is opened on the surface of the buoyancy block (377), and the pressing plate (376) is attached to the outside of the water absorption pad (314).

5. The industrial wastewater auxiliary treatment device for a park according to claim 4, characterized in that: The scraper (37) further includes a guide groove (379) opened on the inner wall of the inner groove (372), and a guide rod (3710) arranged on one side of the buoyancy block (377) away from the connecting rod (378); The guide groove (379) is concentric with the through hole (375). The guide rod (3710) is slidably inserted into the guide groove (379), and the guide rod (3710) and the connecting rod (378) have the same diameter.

6. The industrial wastewater auxiliary treatment device for a park according to claim 5, characterized in that: A metal wire is sewn on one side of the water absorption pad (314) close to the inner wall of the evaporation cylinder (31).

7. An auxiliary treatment method for industrial wastewater in a park, which uses the auxiliary treatment device for industrial wastewater in a park as described in claim 6, and is characterized in that, It includes the following steps: Step 1: Impurity filtration. First, introduce the wastewater into the filtration equipment. After filtering out the solid particles and fibers contained in the wastewater by the filtration equipment, export the wastewater; Step 2: Adjust the pH value. Add an acidic substance or a basic substance to the sewage to adjust the pH value of the wastewater to be within the neutral range; Step 3: Low-temperature evaporation. Use the water injection equipment (4) and the water injection pipe (5) to introduce the wastewater into the low-temperature evaporator (3). Stop injecting the wastewater after it reaches one-third of the volume inside the low-temperature evaporator (3). Then create a vacuum environment inside the low-temperature evaporator (3) and start heating. The rotating shaft (33) drives the scraper (37) to stir the wastewater to evaporate the wastewater. When one-third of the wastewater has evaporated, inject water again; Step 4: Condensation. Introduce the water vapor evaporated inside the low-temperature evaporator (3) into the condenser (6). After condensation, generate condensed water and discharge the condensed water; Step 5: Sewage discharge. After all the wastewater has been processed, a small amount of concentrated liquid will remain inside the low-temperature evaporator (3). Discharge and collect the concentrated liquid.

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