Industrial wastewater auxiliary treatment device and treatment method for park

Abstract

The invention relates to the technical field of wastewater treatment, and discloses an industrial wastewater auxiliary treatment device for a park and a treatment method.The industrial wastewater auxiliary treatment device for the park comprises a rack, a shell cover arranged at the top of the rack, a low-temperature evaporator arranged in the shell cover and water injection equipment arranged on the inner side of the shell cover; the water injection pipe is arranged between the water injection equipment and the low-temperature evaporator, the condenser is arranged at the top of the shell cover, and the power equipment is arranged on the side face of the low-temperature evaporator. According to the industrial wastewater auxiliary treatment device for the park, the low-temperature evaporator is arranged, after wastewater enters the evaporation barrel, a rotating shaft drives a scraper to rotate, the scraper continuously turns the wastewater, and the wastewater is splashed and coated on the inner wall of the evaporation barrel, so that heat dissipated by the inner wall of the evaporation barrel is more fully utilized, the heat absorption speed of the wastewater is increased, and the heat dissipation efficiency of the wastewater is improved. Therefore, the wastewater treatment speed is effectively improved, and the energy consumption is reduced.

Description

Technical Field

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

[0002] Industrial wastewater refers to wastewater generated during industrial production. In industrial parks, industrial wastewater comes from various factories, such as chemical, electroplating, printing and dyeing, pharmaceutical and other industries. Different types of wastewater require different treatment methods and corresponding treatment equipment to purify the wastewater in a targeted manner to meet the standards for safe discharge.

[0003] Wastewater treatment methods generally include physical treatment, chemical treatment and biological treatment. Low-temperature evaporator is one of the corresponding equipment for physical treatment. It mainly creates a vacuum environment and uses the characteristic that the boiling point of water decreases as the pressure decreases. At a relatively low temperature, it evaporates the wastewater by heating, separates water from the wastewater, and thus achieves wastewater concentration and reduction treatment. In this way, the wastewater is evaporated at a lower temperature, avoiding the impact of high temperature on certain pollutants or equipment materials that are easily decomposed by heat.

[0004] The patent with the patent publication number CN112093836A discloses a wastewater heat pump type low-temperature evaporator, which solves the shortcomings existing in the prior art, and includes a defoaming tank, a first heat exchanger, a second heat exchanger and a condensed water circulation barrel. The bottom of the defoaming tank is fixedly connected with a Teflon plate, and a defoaming device is installed on the top of the Teflon plate. The defoaming device is located inside the defoaming tank, and one side of the defoaming tank is fixedly connected with a steam pipeline through a flange. The advantages of the evaporator in this invention patent are small footprint, simple operation process, and high degree of automation of the equipment. The evaporation temperature of water is only about 30 degrees. At this temperature, it is not easy to scale inside the evaporator, and the maintenance cost of the equipment is greatly reduced. In addition, in the process of low-temperature evaporation of water, organic matter is not easy to volatilize, so that the water quality of the outlet water is higher, which 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: Although the low-temperature evaporator has certain excellent characteristics, the method of evaporating water vapor in the wastewater by heating will result in a large energy consumption of the equipment, and the evaporation rate of the wastewater is slow. Compared with physical filtration and chemical neutralization methods, it is less efficient and the economic benefits generated are also lower. As a result, the low-temperature evaporator can only be used in some special occasions, which is not conducive to large-scale popularization. Summary of the invention

[0006] In view of the problems of high consumption and low efficiency in the prior art, an auxiliary treatment device and method for industrial wastewater in a park are proposed.

[0007] The present application provides an auxiliary treatment device and method for industrial wastewater in a park, the purpose of which is to reduce consumption and improve efficiency.

[0008] The technical solution of the present invention is: an auxiliary treatment device for industrial wastewater in a park, comprising a stand, a shell cover arranged on the top of the stand, a low-temperature evaporator arranged inside the shell cover, a water injection device arranged inside the shell cover, a water injection pipe arranged between the water injection device and the low-temperature evaporator, a condenser arranged on the top of the shell cover, and a power device arranged on the side of the low-temperature evaporator. The low-temperature evaporator specifically comprises an evaporating cylinder arranged inside the shell cover, a sealing cover arranged at the opening of the evaporating cylinder, a rotating shaft arranged inside the evaporating cylinder, a rotating gear and a joint pipe arranged outside 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 slide groove opened on the outside of the extension rod, and a limit bolt arranged on the outside of the joint pipe; The rotating shaft passes through the sealing cover and extends into the power equipment. The rotating gear is located at one end of the rotating shaft extending out of the evaporator tube. The joint pipe is connected to the internal space of the rotating shaft. There are multiple groups of joint pipes, which are laid in a linear array on the outside of the rotating shaft. The joint pipes in the same group are distributed in a circular array on the outside of the rotating shaft. The extension rod extends toward the inner wall of the evaporator tube, and the limit bolt is inserted into the rotating slide groove.

[0009] Furthermore, a heating wire is spirally wound inside the cylinder wall of the evaporating cylinder.

[0010] Furthermore, the low-temperature evaporator further comprises 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 slide groove opened on the outer side of the inner shaft, and a water-absorbing pad arranged at one end of the inner shaft away from the rotating gear; The extension rod extends into the rotating shaft, the adjustment slide rod extends into the adjustment slide groove, the rotating slide groove is annular, the adjustment slide groove is distributed in a linear array, the adjustment slide groove is annular, surrounding the outside of the inner shaft, and the adjustment slide groove is divided into three sections: A, B, and C. Section A and section B are arranged in parallel, 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, and the water absorbent pad is fixed on the outside of the shell cover.

[0011] Furthermore, section A of the adjusting chute is located at the central axis of the extension rod, section A of the adjusting chute is located below the adjusting chute, and section B of the adjusting chute is located below the adjusting chute.

[0012] Furthermore, a fixing sleeve is fixedly connected to a side of the scraper away from the extension rod.

[0013] Furthermore, the scraper comprises a plate body arranged at one end of the extension rod away from the rotating shaft, an inner groove opened on the surface of the plate body, a gusset plate arranged at the opening of the inner groove, a receiving groove opened at one end of the plate body close to the water-absorbing pad, a through hole arranged between the receiving groove and the inner groove, a pressing plate arranged inside the receiving groove, a buoyancy block arranged inside the inner groove, and a connecting rod arranged between the buoyancy block and the pressing plate; The inner tank is filled with filling liquid, the material density of the buoyancy block is less than the density of the filling liquid, a connecting groove is opened on the surface of the buoyancy block, and the pressing plate is attached to the outer side of the water-absorbing pad.

[0014] Furthermore, the scraper also includes a guide groove opened on the inner wall of the inner groove, and a guide rod arranged on the side of the buoyancy block away from the connecting rod; The guide groove is concentrically arranged with the through hole, the guide rod is slidably inserted in the guide groove, and the guide rod and the connecting rod have the same diameter.

[0015] Furthermore, a metal wire is sewn on one side of the water-absorbing pad close to the inner wall of the evaporating cylinder.

[0016] An auxiliary treatment method for industrial wastewater in a park, using the auxiliary treatment device for industrial wastewater in a park, comprises the following steps: Step 1: Impurity filtration. First, the wastewater is introduced into the filtration equipment, and the solid particles and fibers that may be contained in the wastewater are filtered out by the filtration equipment, and then the wastewater is discharged; this can prevent these impurities from entering the low-temperature evaporator, clogging the pipeline or affecting the heat exchange efficiency of the evaporator; Step 2: Adjust the pH value by 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; Step 3: Low-temperature evaporation. Use water injection equipment and water injection pipes to introduce wastewater into the low-temperature evaporator. Stop injecting wastewater when it reaches one-third of the internal volume of the low-temperature evaporator. Then create a vacuum environment in the low-temperature evaporator and start heating. The rotating shaft drives the scraper to turn the wastewater to evaporate the wastewater. When one-third of the wastewater evaporates, water is injected again. Step 4: Condensation, the water vapor evaporated in the low-temperature evaporator is introduced into the condenser, and condensed water is generated after condensation, and the condensed water is discharged; Step 5: Draining sewage. After all the wastewater is discharged, a small amount of concentrated liquid will remain in the low-temperature evaporator, which will be discharged and collected.

[0017] Beneficial effects of the present invention: 1. By setting up a low-temperature evaporator, after the wastewater enters the evaporation cylinder, the rotating shaft drives the scraper to rotate, and the scraper continuously turns the wastewater, and splashes and coats the wastewater on the inner wall of the evaporation cylinder. In this way, the heat emitted by the inner wall of the evaporation cylinder is more fully utilized, which increases the heat absorption rate of the wastewater, allowing it to evaporate quickly, effectively improving the wastewater treatment speed, reducing energy consumption, and obtaining greater economic benefits.

[0018] 2. By setting the inner shaft, when the rotating shaft drives the scraper to rotate, the extension rod rotates around the inner shaft, and the adjusting slide bar slides in the adjusting chute. Before the scraper enters the wastewater, the adjusting slide bar enters the A section of the adjusting chute, and the scraper is deflected to a state perpendicular to the central axis of the rotating shaft. In this way, the resistance of the scraper can be reduced during the movement of the scraper in the wastewater, so that the overall material and process requirements of the equipment are reduced, the kinetic energy consumption is reduced, and the working state is more stable. When the scraper is about to leave the wastewater, the adjusting slide bar enters the B section of the adjusting chute, and the scraper is deflected to a state parallel to the central axis of the rotating shaft. In this way, the scraper can turn over the wastewater to the greatest extent and improve the evaporation efficiency.

[0019] 3. By setting the absorbent pad, the fixed sleeve will absorb part of the wastewater after entering the wastewater. When rotating with the scraper, the wastewater can be smeared on the inner wall surface of the evaporator tube, so that it can disperse the wastewater better and have a larger area of ​​contact with the inner wall of the evaporator tube, further improving the evaporation efficiency.

[0020] 4. By setting a scraper, when the plate body leaves the wastewater, the absorbent pad will smear the absorbed wastewater on the inner wall of the evaporator tube. When the plate body moves to above the central axis of the rotating shaft, the buoyancy block drives the pressure plate toward the absorbent pad under the buoyancy of the filling liquid. The wastewater absorbed by the absorbent pad is continuously squeezed out during the movement, which further improves the dispersion effect of the wastewater, makes the smearing process even, and has higher heat absorption efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the auxiliary treatment device for industrial wastewater used in the industrial park according to the present invention; Figure 2 This is a schematic diagram of the interior of the housing of the present invention; Figure 3 It is a schematic diagram of the evaporator of the present invention; Figure 4 This is a schematic diagram of disassembling the evaporator of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram after the perspective is flipped; Figure 6 It is a schematic diagram of the rotating shaft of the present invention; Figure 7 It is a schematic diagram of the inner shaft of the present invention and the inner shaft after being flattened along the circumferential direction; Figure 8It is a schematic diagram of the scraper of the present invention; Fig. 9 This is a schematic diagram of the interior of the scraper of the present invention; Fig.10 This is a disassembly diagram of the scraper of the present invention; Fig.11 It is a top view of the evaporator of the present invention; Fig.12 For the present invention Fig.11 Middle DD section view; Fig.13 For the present invention Fig.11 Middle EE section view; Fig.14 For the present invention Fig.13 Schematic diagram of the middle extension rod and scraper; Fig.15 For the present invention Fig.14 Enlarged view of point F in the middle; Fig.16 For the present invention Fig.14 Schematic diagram of the middle scraper.

[0022] In the figure: 1. Stand; 2. Shell cover; 3. Low-temperature evaporator; 31. Evaporation tube; 32. Sealing cover; 33. Rotating shaft; 34. Rotating gear; 35. Joint pipe; 36. Extension rod; 37. Scraper; 371. Plate body; 372. Inner groove; 373. Buckle plate; 374. Storage groove; 375. Through hole; 376. Press plate; 377. Buoyancy block; 378. Connecting rod; 379. Guide groove; 3710. Guide rod; 38. Rotating slide groove; 39. Limit bolt; 310. Adjusting slide rod; 311. Inner shaft; 312. Adjusting slide groove; 313. Fixed sleeve; 314. Water-absorbing pad; 4. Water injection equipment; 5. Water injection pipe; 6. Condenser; 7. Power equipment. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] Example 1

[0025] Reference Figure 1-Figure 16, which is the first embodiment of the present invention, provides an industrial wastewater auxiliary treatment device for a park, including a stand 1, a shell cover 2 arranged on the top of the stand 1, a low-temperature evaporator 3 arranged inside the shell cover 2, a water injection device 4 arranged on the inner side of the shell 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 shell cover 2, and a power device 7 arranged on the side of the low-temperature evaporator 3. The low-temperature evaporator 3 specifically includes an evaporation tube 31 arranged on the inner side of the shell cover 2, a sealing cover 32 arranged at the opening of the evaporation tube 31, a rotating shaft 33 arranged inside the evaporation tube 31, a rotating gear 34 and a joint pipe 35 arranged on the outside of the rotating shaft 33, an extension rod 36 arranged inside the joint pipe 35, a scraper 37 arranged at one end of the extension rod 36 away from the joint pipe 35, a rotating slide groove 38 opened on the outside of the extension rod 36, and a limit bolt 39 arranged on the outside of the joint pipe 35.

[0026] Specifically, the shell cover 2 is fixed to the stand 1 by bolts, the low-temperature evaporator 3 is fixed to the shell cover 2 by bolts, the water injection device 4 is fixed to the stand 1 by bolts, the water injection device 4 is connected to the wastewater tank through a pipeline, the condenser 6 is fixed to the shell cover 2 by bolts, the power device 7 is fixed to the low-temperature evaporator 3 by bolts, the low-temperature evaporator 3 is connected to the condenser 6 through a pipeline, a sewage pipe is arranged on the side of the low-temperature evaporator 3, a drainage pipe is arranged 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 the sealing cover 32 and extends into the power device 7, and the rotating gear 34 is located on the rotating shaft 33 and extends out of the evaporation cylinder 31 At one end, the rotating gear 34 is located in the power equipment 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, the joint pipe 35 is provided with multiple groups, and is laid on the outside of the rotating shaft 33 in a linear array, and the joint pipes 35 in the same group are distributed on the outside of the rotating shaft 33 in a circular array, the extension rod 36 extends toward the inner wall of the evaporator tube 31, the scraper 37 is fixed to the extension rod 36 by bolts, the limit bolt 39 is inserted into the rotating slide groove 38, the limit bolt 39 is inserted into the surface of the joint pipe 35 and fixed by threads, a heating wire is spirally coiled inside the tube wall of the evaporator tube 31, and the wastewater storage capacity in the evaporator tube 31 does not exceed one third of the total volume.

[0027] By setting up the low-temperature evaporator 3, after the waste water enters the evaporation tube 31, the rotating shaft 33 drives the scraper 37 to rotate, and the scraper 37 continuously turns over the waste water, and splashes and smears the waste water on the inner wall of the evaporation tube 31, so that the heat emitted by the inner wall of the evaporation tube 31 can be more fully utilized, the heat absorption speed of the waste water is increased, and it can evaporate quickly, which effectively improves the waste water treatment speed, reduces energy consumption, and can obtain greater economic benefits.

[0028] The low-temperature evaporator 3 also includes an adjustment 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 adjustment slide groove 312 opened on the outside 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.

[0029] Specifically, the adjusting slide rod 310 is welded to the extension rod 36, the extension rod 36 extends into the rotating shaft 33, the adjusting slide rod 310 extends into the adjusting slide groove 312, the rotating slide groove 38 is annular, the adjusting slide groove 312 is distributed in a linear array, the adjusting slide groove 312 is annular, surrounding the outer side of the inner shaft 311, and the adjusting slide groove 312 is divided into three sections A, B, and C, wherein the A section and the B section are arranged in parallel, the C section is connected between the two ends of the A section and the B section, and the distance between the A section and the B section is the same as the distance from the central axis of the adjusting slide rod 310 to the extension shaft 33. The distance between the center axis of the rod 36 is the same, and the water absorbent pad 314 is fixed on the outside of the shell cover 2; the A section of the adjusting slot 312 is located at the center axis of the extension rod 36, the A section of the adjusting slot 312 is located below the adjusting slot 312, and the B section of the adjusting slot 312 is located below the adjusting slot 312; the side of the scraper 37 away from the extension rod 36 is fixedly connected with a fixing sleeve 313, the fixing sleeve 313 is fixedly connected to the shell cover 2, the inner shaft 311 is rotatably connected to the inside of the rotating shaft 33, and the water absorbent pad 314 is fixed to the scraper 37 by screws.

[0030] By setting 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 bar 310 slides in the adjusting slide groove 312. Before the scraper 37 enters the wastewater, the adjusting slide bar 310 enters the A section of the adjusting slide groove 312, and the scraper 37 is deflected to a state perpendicular to the central axis of the rotating shaft 33. In this way, the resistance of the scraper 37 during its movement in the wastewater can be reduced, so that the overall material and process requirements of the equipment are reduced, the kinetic energy consumption is reduced, and the working state is more stable. When the scraper 37 is about to leave the wastewater, the adjusting slide bar 310 enters the B section of the adjusting slide groove 312, and the scraper 37 is deflected to a state parallel to the central axis of the rotating shaft 33. In this way, the scraper 37 can turn over the wastewater to the greatest extent, thereby improving the evaporation efficiency.

[0031] By setting the absorbent pad 314, the fixed sleeve 313 will absorb part of the wastewater after entering the wastewater. When rotating with the scraper 37, the wastewater can be smeared on the inner wall surface of the evaporation tube 31, so that the wastewater can be better dispersed, and there is a larger area of ​​contact with the inner wall of the evaporation tube 31, further improving the evaporation efficiency.

[0032] The scraper 37 comprises a plate body 371 arranged at the 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 the end of the plate body 371 close to the water-absorbing pad 314, a through hole 375 arranged between the storage groove 374 and the inner groove 372, a pressure 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 pressure plate 376; the scraper 37 also includes a guide groove 379 opened on the inner wall of the inner groove 372, and a guide rod 3710 arranged on the side of the buoyancy block 377 away from the connecting rod 378.

[0033] Specifically, the buckle plate 373 is fixed to the plate body 371 by bolts, the inner groove 372 is filled with 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, a connecting groove is provided on the surface of the buoyancy block 377, and the pressure plate 376 is attached to the outer side of the absorbent pad 314; the guide groove 379 is concentrically arranged with the through hole 375, and the guide rod 3710 is slidably inserted into the guide groove 379. The guide rod 3710 and the connecting rod 378 have the same diameter, and the connecting rod 378 and the guide rod 3710 are both fixedly connected to the buoyancy block 377, the pressure plate 376 and the connecting rod 378 are fixed by bolts, the guide groove 379 extends to the surface of the plate body 371, and sealing rings are provided in the guide groove 379 and the through hole 375.

[0034] By setting the scraper 37, when the plate body 371 leaves the wastewater, the absorbent pad 314 smears the absorbed wastewater on the inner wall of the evaporating cylinder 31, and when the plate body 371 moves to above the central axis of the rotating shaft 33, the buoyancy block 377 drives the pressure plate 376 toward the absorbent pad 314 under the buoyancy of the filling liquid, and the wastewater absorbed by the absorbent pad 314 is continuously squeezed out during the movement, thereby further improving the dispersion effect of the wastewater, making the smearing process even and the heat absorption efficiency higher. At the same time, the guide rod 3710 and the connecting rod 378 move synchronously, and the guide rod 3710 enters the inner groove 372 as much as the connecting rod 378 moves out of the inner groove 372, thereby balancing the internal pressure of the inner groove 372 and maintaining stable operation of the equipment.

[0035] 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.

[0036] Example 2

[0037] 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: 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; 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; 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; 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; 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.

[0038] The working principle of the industrial wastewater auxiliary treatment device used in the park of the present invention is as follows: 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.

[0039] The power device 7 is started, and 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 adjustment slide bar 310 slides in the adjustment slide groove 312. Before the scraper 37 enters the wastewater, the adjustment slide bar 310 slides into the A section of the adjustment slide groove 312. At this time, the adjustment slide bar 310 and the central axis of the extension rod 36 are located in the same vertical plane (refer to Fig.11The scraper 37 is deflected to a state perpendicular to the central axis of the rotating shaft 33, and the scraper 37 enters the wastewater and slides through the wastewater. When the scraper 37 is about to leave the wastewater, the adjusting slide bar 310 slides into the B section of the adjusting slide groove 312. At this time, the adjusting slide bar 310 and the central axis of the extension rod 36 are located in the same horizontal plane (i.e., the plane coincident with the central axis of the rotating shaft 33), and the scraper 37 is deflected to a state parallel to the central axis of the rotating shaft 33, and the scraper 37 leaves the wastewater and lifts the wastewater.

[0040] When the water-absorbing pad 314 is in the wastewater, it absorbs part of the wastewater. After the water-absorbing pad 314 leaves the wastewater with the scraper 37, the water-absorbing pad 314 smears the absorbed wastewater on the surface of the evaporation tube 31. At the same time, when the plate body 371 rotates to the upper side of the central axis of the rotating shaft 33, the buoyancy block 377 floats toward the water-absorbing pad 314 under the buoyancy of the filling liquid. The buoyancy block 377 drives the guide rod 3710 to leave the guide groove 379. The buoyancy block 377 is connected to the guide rod 3710. The rod 378 pushes the pressure plate 376 to squeeze the water-absorbing pad 314. The waste water absorbed by the water-absorbing pad 314 is continuously squeezed out during the movement and smeared on the inner wall of the evaporating cylinder 31. When the plate body 371 rotates one hundred and eighty degrees and the height is lower than the central axis of the rotating shaft 33, the buoyancy block 377 floats away from the water-absorbing pad 314 under the buoyancy of the filling liquid, the guide rod 3710 is inserted into the guide groove 379, and the pressure plate 376 is also retracted into the receiving groove 374.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An industrial wastewater auxiliary treatment device for a park, comprising a stand (1), a shell (2) arranged on the top of the stand (1), a low-temperature evaporator (3) arranged inside the shell (2), a water injection device (4) arranged on the inner side of the shell (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 shell (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 comprises an evaporation tube (31) arranged on the inner side of the shell cover (2), a sealing cover (32) arranged at the opening of the evaporation tube (31), a rotating shaft (33) arranged inside the evaporation tube (31), a rotating gear (34) and a joint pipe (35) arranged outside the rotating shaft (33), an extension rod (36) arranged inside the joint pipe (35), a scraper (37) arranged at one end of the extension rod (36) away from the joint pipe (35), a rotating slide groove (38) opened on the outer side of the extension rod (36), and a limit bolt (39) arranged on the outer side of the joint pipe (35); The rotating shaft (33) passes 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 evaporating tube (31). The joint pipe (35) is connected to the internal space of the rotating shaft (33). The joint pipes (35) are provided in a plurality of groups and are laid out in a linear array on the outside of the rotating shaft (33). The joint 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 toward the inner wall of the evaporating tube (31). The limit bolt (39) is inserted into the rotating slide groove (38).

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

3. The industrial wastewater auxiliary treatment device for a park according to claim 2 is characterized in that: The low-temperature evaporator (3) further comprises 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 slide groove (312) opened on the outside of the inner shaft (311), and a water-absorbing pad (314) arranged 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 adjustment slide rod (310) extends into the adjustment slide groove (312), the rotating slide groove (38) is annular, the adjustment slide grooves (312) are distributed in a linear array, the adjustment slide groove (312) is annular and surrounds the outside of the inner shaft (311), and the adjustment slide groove (312) is divided into three sections A, B, and C, wherein section A and section B are arranged in parallel, section C is connected between the two ends of section A and section B, and the distance between section A and section B is the same as the distance from the central axis of the adjustment slide rod (310) to the central axis of the extension rod (36), and the water absorbent pad (314) is fixed to the outside of the shell cover (2).

4. The industrial wastewater auxiliary treatment device for a park according to claim 3 is characterized in that: Section A of the adjustment slide groove (312) is located at the central axis of the extension rod (36), section A of the adjustment slide groove (312) is located below the adjustment slide groove (312), and section B of the adjustment slide groove (312) is located below the adjustment slide groove (312).

5. The industrial wastewater auxiliary treatment device for a park according to claim 4 is characterized in that: A fixing sleeve (313) is fixedly connected to a side of the scraper (37) away from the extension rod (36).

6. The industrial wastewater auxiliary treatment device for a park according to claim 5 is characterized in that: The scraper (37) comprises a plate body (371) arranged at one end of the extension rod (36) away from the rotation axis (33), an inner groove (372) provided on the surface of the plate body (371), a buckle plate (373) provided at the opening of the inner groove (372), a receiving groove (374) provided at one end of the plate body (371) close to the water-absorbing pad (314), a through hole (375) provided between the receiving groove (374) and the inner groove (372), a pressing plate (376) provided inside the receiving 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 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 connecting groove is provided on the surface of the buoyancy block (377), and the pressing plate (376) is attached to the outer side of the water-absorbing pad (314).

7. The industrial wastewater auxiliary treatment device for a park according to claim 6 is characterized in that: The scraper (37) further comprises a guide groove (379) formed on the inner wall of the inner groove (372), and a guide rod (3710) disposed on a side of the buoyancy block (377) away from the connecting rod (378); The guide groove (379) is arranged concentrically 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.

8. The industrial wastewater auxiliary treatment device for a park according to claim 7 is characterized in that: A metal wire is sewn on one side of the water-absorbing pad (314) close to the inner wall of the evaporation cylinder (31).

9. An auxiliary treatment method for industrial wastewater in a park, using the auxiliary treatment device for industrial wastewater in a park as claimed in claim 8, characterized in that: The following steps are involved: Step 1: Impurity filtration: first, the wastewater is introduced into the filtration equipment, and the solid particles and fibers that may be contained in the wastewater are filtered out by the filtration equipment, and then the wastewater is discharged; Step 2: Adjust the pH value by adding acidic or alkaline substances to the sewage to adjust the pH value of the wastewater to a neutral range; 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, a vacuum environment is created in the low-temperature evaporator (3), and heating is started. The rotating shaft (33) drives the scraper (37) to turn the wastewater to evaporate the wastewater. When one-third of the wastewater has evaporated, water is injected again; Step 4: Condensation, the water vapor evaporated in the low-temperature evaporator (3) is introduced into the condenser (6), condensed to generate condensed water, and the condensed water is discharged; Step 5: Draining sewage. After all the wastewater is discharged, a small amount of concentrated liquid will remain in the low-temperature evaporator (3). The concentrated liquid is discharged and collected.

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