A thermal treatment wastewater treatment system

Abstract

The present application relates to a kind of heat treatment wastewater treatment systems, it includes: cooling structure, filter structure, oil-water separation structure, flocculation precipitation structure, filter-press structure and adsorption structure, when treating wastewater, first by cooling structure to the wastewater generated in heat treatment process cooling cooling, so that it is reduced to normal temperature or lower temperature, so that the normal operation of subsequent processing equipment and prolong service life;Then by filter structure to filter out the solid impurities (such as metal oxide skin, waste residue etc.) in wastewater, through oil-water separation structure to the oil-water separation of wastewater, to remove the oil dirt contained in wastewater;Next, flocculation agent is added to wastewater to carry out flocculation precipitation, and the sludge precipitated by filter-press structure is filtered and drained, and the supernatant can be reused after adsorption by adsorption structure, without polluting the environment, while saving water resources and saving cost.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of waste water treatment in heat treatment, and particularly relates to a heat treatment waste water treatment system. BACKGROUND

[0002] Bolts are common fasteners, mainly used in mechanical equipment and building structures, and the core function is to achieve detachable fastening connection through cooperation with nuts. After production and processing, bolts need to be heat treated. The main purpose of heat treatment is to improve the comprehensive mechanical properties to meet the requirements of product specified tensile strength and yield ratio. Heat treatment includes steps such as annealing, normalizing, quenching and tempering.

[0003] Waste water is generated during heat treatment. Since the heat treatment waste water contains various pollutants (such as oils, surfactants, rust inhibitors, metal ions, iron filings, etc.), if these substances are directly discharged into the environment, not only will they cause serious pollution to water bodies, soil and air, affect ecological balance and human health, but also will waste a large amount of water resources and increase the operating cost of enterprises. Moreover, untreated waste water directly discharged may block equipment and corrode pipelines, affecting the normal operation of production equipment. SUMMARY

[0004] The present application provides a heat treatment waste water treatment system, which solves the defects of environmental pollution and water resource waste caused by direct discharge of heat treatment waste water.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is as follows: a heat treatment waste water treatment system, comprising:

[0006] A cooling structure is arranged for cooling and cooling down the waste water.

[0007] A filtering structure is arranged for filtering the waste water cooled and cooled down, and the filtering structure comprises a filtering pipe, a first filter screen rotatably installed on the inner side wall of the filtering pipe, a filtering sliding block slidingly installed on the inner side wall of the filtering pipe, and a second filter screen rotatably connected to one side of the first filter screen and rotatably connected to the other side of the filtering sliding block.

[0008] An oil-water separation structure is arranged, which comprises an oil-water separation mechanism and an oil skimming mechanism installed on the top of the oil-water separation mechanism. The oil-water separation mechanism is used for separating oil stains in the waste water, and the oil skimming mechanism is used for skimming off the oil stains separated on the surface of the waste water.

[0009] The oil skimming mechanism comprises an oil skimming shaft rotatably installed on the oil-water separation mechanism, an oil skimming disc spacedly sleeved on the oil skimming shaft, and an oil scraping plate angularly installed on one side of the oil skimming disc. The oil scraping plate is used for scraping off oil stains of different thicknesses adhered to the outer peripheral surface of the oil skimming disc.

[0010] The flocculation and precipitation structure comprises a stirring mechanism and a precipitation mechanism installed on one side of the stirring mechanism.

[0011] The pressure filtration structure comprises a pressure filtration mechanism for pressure filtration and drainage of the precipitated sludge and a sludge conveying mechanism for conveying the sludge cake after pressure filtration.

[0012] The adsorption structure is used for adsorbing the supernatant after precipitation of the precipitation mechanism.

[0013] Optimally, the cooling structure comprises a cooling box, cooling pipes installed in the cooling box, and a spray pipe arranged above the cooling pipes for cooling and temperature reduction of the wastewater in the cooling pipes.

[0014] Optimally, the cooling pipes comprise cooling main pipes and cooling auxiliary pipes, the cooling auxiliary pipes are installed between the cooling main pipes and staggered in the vertical direction.

[0015] The spray pipe comprises a spray main pipe, a spray auxiliary pipe connected with the spray main pipe, spray holes arranged at the bottom of the spray auxiliary pipe, and a coiled pipe integrally connected with the spray auxiliary pipe, one end of the coiled pipe is close to the spray main pipe, and the other end of the coiled pipe is away from the spray main pipe.

[0016] Optimally, the filtration structure has three states:

[0017] State one: the first filter screen and the second filter screen are obliquely arranged;

[0018] State two: the first filter screen is vertically arranged, and the second filter screen is obliquely arranged;

[0019] State three: the second filter screen is vertically arranged, and the first filter screen is obliquely arranged.

[0020] Optimally, the stirring mechanism comprises a stirring box, stirring shafts and stirring frames installed in the stirring box in opposite rotating directions, outer stirring blades integrally connected to the outer side of the stirring shafts, and inner stirring blades integrally connected to the inner side of the stirring frames.

[0021] Optimally, the pressure filtration mechanism comprises upper and lower pressure filtration belts in opposite rotating directions, and the precipitated sludge is subjected to pressure filtration and drainage between the upper and lower pressure filtration belts to form a sludge cake.

[0022] Optimally, the sludge conveying mechanism comprises a sludge conveying frame, sludge conveying rollers rotatably installed on the sludge conveying frame, a sludge conveying belt wound between the sludge conveying rollers, and an anti-falling assembly for preventing the sludge conveying belt from falling.

[0023] Optimally, the anti-falling assembly comprises an upper limiting rod and a lower limiting rod installed above the mud feeding frame, a limiting slot formed between the upper limiting rod and the lower limiting rod, a pull plate fixed on the outer circumferential surface of the mud belt at intervals, and a pull column fixed outside the pull plate, which is placed in the limiting slot when the mud belt conveys the pressed filter cake.

[0024] Optimally, the adsorption structure comprises an adsorption box, a plug-in plate installed on one side of the adsorption box, an adsorption plate installed in the plug-in plate, and a sealing mechanism arranged between the plug-in plate and the adsorption box.

[0025] Optimally, the sealing mechanism comprises a push plate fixed on the side of the plug-in plate away from the adsorption box, an elastic member arranged on one side of the adsorption box, and a sealing member abutting against the elastic member, which abuts against the inner side of the push plate under the action of the elastic member when the push plate abuts against the adsorption box.

[0026] Thanks to the use of the above technical solutions, the present application has the following advantages compared with the prior art:

[0027] When treating wastewater, the heat treatment wastewater treatment system of the present application first cools the wastewater generated in the heat treatment process by the cooling structure to normal temperature or a lower temperature, so as to ensure the normal operation of the subsequent treatment equipment and prolong the service life; then filters out the solid impurities (such as metal oxide scales, waste residues, etc.) in the wastewater by the filtering structure, separates the oil and water in the wastewater by the oil-water separation structure to remove the oil stains contained in the wastewater; next, a flocculating agent is added to the wastewater for flocculation and sedimentation, the sludge settled by sedimentation is subjected to pressure filtration by the pressure filtration structure, and the upper clear liquid can be reused after being adsorbed by the adsorption structure, without polluting the environment, while saving water resources and reducing costs. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The figure is a structural schematic diagram of the present application;

[0029] Figure 2 The figure is a structural schematic diagram of the cooling structure of the present application;

[0030] Figure 3 The figure is a sectional view of the cooling structure of the present application;

[0031] Figure 4 The figure is a structural schematic diagram of the spraying pipe of the present application;

[0032] Figure 5 The figure is a structural schematic diagram of the cooling pipe of the present application;

[0033] Figure 6 The figure is a sectional view of the filtering structure of the present application;

[0034] Figure 7 is a sectional view of the oil-water separation structure of the present application;

[0035] Figure 8 is a schematic view of the oil skimming mechanism in the oil-water separation structure of the present application;

[0036] Figure 9 is a sectional view of the oil-water separation structure of the present application; Figure 8

[0037] Figure 10 is a front view of the stirring mechanism in the flocculation and precipitation structure of the present application;

[0038] Figure 11 is a schematic view of the stirring mechanism in the flocculation and precipitation structure of the present application;

[0039] Figure 12 is a front view of the precipitation mechanism in the flocculation and precipitation structure of the present application;

[0040] Figure 13 is a structural schematic view of the filter pressing mechanism of the present application;

[0041] Figure 14 is a structural schematic view of the filter pressing mechanism of the present application from another angle;

[0042] Figure 15 is a front view of the filter pressing mechanism of the present application;

[0043] Figure 16 is a top view of the filter pressing mechanism of the present application;

[0044] Figure 17 is a structural schematic view of the sludge feeding mechanism of the present application;

[0045] Figure 18 is a front view of the sludge feeding mechanism of the present application;

[0046] Figure 19 is a right view of the sludge feeding mechanism of the present application;

[0047] Figure 20 is a structural schematic view of the adsorption structure of the present application;

[0048] Figure 21 is a structural schematic view of the adsorption structure of the present application from another angle;

[0049] Figure 22 is a sectional view of the adsorption structure of the present application;

[0050] Figure 23 is an enlarged view of A in the oil-water separation structure of the present application; Figure 22

[0051] BRIEF DESCRIPTION OF THE DRAWINGS:

[0052] ​​1. Cooling structure; 101. Circulation pool; 102. Cooling box; 103. Fan; 104. Air inlet groove; 105. Circulation pipe; 106. Main spray pipe; 107. Auxiliary spray pipe; 108. Spray hole; 109. Connecting column; 110. Coiled pipe; 111. Main cooling pipe; 112. Auxiliary cooling pipe;

[0053] 2. Filtering structure; 201. Filtering pipe; 202. First filter screen; 203. First filter hole; 204. Second filter screen; 205. Second filter hole; 206. Filtering slider;

[0054] 3. Oil-water separation structure; 301. Oil-water separation box; 302. Partition; 303. First separation cavity; 304. Second separation cavity; 305. Inlet baffle; 306. Through hole; 307. Transition pipe; 308. Transition baffle; 309. Outlet baffle; 310. First oil skimming shaft; 311. Second oil skimming shaft; 312. First oil skimming disc; 313. Second oil skimming disc; 314. Oil skimming support plate; 315. Oil guide plate; 316. Bearing seat; 317. Oil scraping shaft; 318. Oil scraping plate; 319. Arc-shaped portion; 320. Oil scraping support frame; 321. Worm; 322. Worm wheel;

[0055] 4. Flocculation and sedimentation structure; 401. Stirring box; 402. Driving bevel gear; 403. First driven bevel gear; 404. Second driven bevel gear; 405. Stirring shaft; 406. Stirring frame; 407. Stirring support plate; 408. Outer stirring blade; 409. Inner stirring blade; 410. Sedimentation pool; 411. Sedimentation tank; 412. Sludge discharge pipe; 413. Inclined plate;

[0056] 5. Filter pressing structure; 501. Upper filter pressing frame; 502. Upper tensioning roller; 503. Upper tensioning cylinder; 504. Upper tensioning plate; 505. Upper avoiding groove; 506. Upper support roller; 507. Upper filter pressing belt; 508. Upper filter pressing gear; 509. Upper recovery roller; 510. Upper scraper; 511. Sludge cutting frame; 512. Gathering plate; 513. Sludge cutting knife; 514. Laying plate; 515. Lower filter pressing frame; 516. Lower tensioning roller; 517. Lower tensioning cylinder; 518. Lower tensioning plate; 519. Lower avoiding groove; 520. Lower support roller; 521. Lower filter pressing belt; 522. Lower filter pressing gear; 523. Lower recovery roller; 524. Lower scraper; 525. Receiving disc; 526. Extrusion roller; 527. Protrusion; 528. Sludge feeding frame; 529. Sludge feeding roller; 530. Sludge feeding belt; 531. Pulling plate; 532. Pulling column; 533. Upper limiting rod; 534. Lower limiting rod; 535. Limiting groove; 536. Guide portion;

[0057] 6. Adsorption structure; 601. Adsorption box; 602. Through groove; 603. Guide groove; 604. Push plate; 605. Insert plate; 606. Guide strip; 607. Mounting groove; 608. Adsorption plate; 609. First magnet; 610. Second magnet; 611. Sealing groove; 612. Spring groove; 613. Compression spring; 614. Pressure plate; 615. Sealing strip; 616. Positioning groove. Detailed Implementation

[0058] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0059] like Figure 1 The diagram shown is a simplified flow chart of the wastewater treatment system of this invention. The system includes a cooling structure 1, a filtration structure 2, an oil-water separation structure 3, a flocculation and sedimentation structure 4, a pressure filter structure 5, and an adsorption structure 6. The cooling structure 1 cools the wastewater to room temperature or a lower temperature to ensure the normal operation and extend the service life of subsequent treatment equipment. The filtration structure 2 filters the cooled wastewater, intercepting larger solid impurities such as metal scale and slag to prevent clogging of subsequent treatment equipment.

[0060] The oil-water separation structure 3 is used to separate oil from wastewater to remove oil stains. The flocculation and sedimentation structure 4 is used to flocculate and settle wastewater, causing colloidal particles and tiny suspended solids in the water to aggregate. The supernatant is adsorbed by the adsorption structure 6 and then recycled. The sludge that settles is filtered and drained through the filter press structure 5. The filter cake after filtration is then discharged periodically.

[0061] like Figure 2 , 3 As shown, the cooling structure 1 includes a circulation pool 101, a cooling box 102, a fan 103, an air inlet slot 104, a circulation pipe 105, a main spray pipe 106, a secondary spray pipe 107, spray holes 108, a connecting column 109, a winding pipe 110, a main cooling pipe 111, and a secondary cooling pipe 112. The circulation pool 101 has a box-like structure with a hollow interior for storing cooling water. The cooling box 102 is fixed to the top of the circulation pool 101 by bolts and is connected to the interior of the circulation pool 101. Cooling water flows through the cooling box 102 to the circulation pool 101 below, thereby realizing the recycling of cooling water.

[0062] A fan 103 is installed on the top of the cooling box 102, which is used to draw out the hot air in the cooling box 102, so as to achieve heat exchange and complete the cooling treatment of the wastewater in the cooling pipe.

[0063] As shown in Figure 5 The cooling pipe is provided with two groups in the vertical direction, each group of the cooling pipe includes a cooling main pipe 111 and a cooling auxiliary pipe 112, the cooling auxiliary pipe 112 is connected with the inside of the cooling main pipe 111, the wastewater is introduced from one side of the cooling main pipe 111, and then is divided into the cooling auxiliary pipe 112, and then is collected and discharged from the other end of the cooling main pipe 111.

[0064] The cooling auxiliary pipe 112 is installed between the cooling main pipes 111, and the two groups of the cooling auxiliary pipes 112 are staggered in the vertical direction (that is, the upper cooling auxiliary pipe 112 is one more than the lower cooling auxiliary pipe 112, and the lower cooling auxiliary pipe 112 is located between the two adjacent upper cooling auxiliary pipes 112), the cooling water is sprayed on the upper cooling auxiliary pipe 112 through the spray pipe, and then flows down from both sides of the upper cooling auxiliary pipe 112 to the lower cooling auxiliary pipe 112.

[0065] The staggered design of the cooling auxiliary pipe 112 can save the use of cooling water, and the upper cooling auxiliary pipe 112 will not block the lower cooling auxiliary pipe 112, and will not affect the cooling effect of the lower cooling auxiliary pipe 112.

[0066] As shown in Figure 4 The structure diagram of the spray pipe, one end of the circulating pipe 105 extends into the circulating pool 101 and is connected with the water pump in the circulating pool 101, the cooling water in the circulating pool 101 is pumped into the circulating pipe 105 through the water pump, and then is transmitted into the spray pipe. The spray main pipe 106 is connected with the circulating pipe 105, the spray auxiliary pipe 107 is connected with the spray main pipe 106, the cooling water in the circulating pool 101 is pumped into the circulating pipe 105 under the action of the water pump, and then is divided into each spray auxiliary pipe 107 through the division of the spray main pipe 106 (the number of the spray auxiliary pipe 107 is the same as that of the upper cooling auxiliary pipe 112, and is located directly above the upper cooling auxiliary pipe 112, so that the cooling water is sprayed from the directly above to the cooling auxiliary pipe 112, and then is diffused and splashed on the lower cooling auxiliary pipe 112).

[0067] A connecting post 109 is fixed to one end of multiple spray sub-pipes 107 away from the main spray pipe 106. The connecting post 109 is fixed to the inner wall of the cooling box 102 by welding and is used to support the installation of the spray sub-pipes 107. Spray holes 108 are spaced apart at the bottom of the spray sub-pipes 107, and the cooling water in the spray sub-pipes 107 is sprayed onto the upper cooling sub-pipes 112 through the spray holes 108.

[0068] The winding tube 110 is integrally connected to the spray sub-tube 107, with one end of the winding tube 110 close to the spray main tube 106 and the other end close to the connecting post 109. When the cooling water flows from the spray main tube 106 to the spray sub-tube 107, a portion of the cooling water will flow through the winding tube 110 to the spray hole 108, which is far away from the spray main tube 106. This ensures that the amount of cooling water sprayed from the spray hole 108 is the same, and avoids the inconsistent water volume in the spray hole 108 from affecting the cooling effect of the wastewater in the cooling pipe below.

[0069] The working process of cooling structure 1 is as follows:

[0070] The heat treatment wastewater awaiting cooling enters the cooling secondary pipe 112 through the cooling main pipe 111. Under the suction of the water pump, the cooled spray water flows upward through the circulation pipe 105 into the spray main pipe 106, and then flows into the spray secondary pipe 107, finally exiting from the spray hole 108 (the arrangement of the winding pipe 110 ensures that the water volume of each spray hole 108 is consistent). The cooling water sprays onto the cooling pipe and forms a water film on the surface of the cooling pipe. Air enters the cooling box 102 through the air inlet 104 below, moving in the opposite direction to the spray water and exchanging heat with the water film. The air temperature rises and the wastewater temperature drops. Under the suction of the fan 103 above, the air is discharged from the top of the cooling box 102, while the spray water falls back into the circulation pool 101 below for the next cycle. The cooled wastewater is discharged from the other side of the cooling main pipe 111 for subsequent operations.

[0071] like Figure 6 The diagram shows a schematic of filter structure 2, which is used to filter out larger solid impurities in wastewater, such as metal oxide scale and slag, to prevent them from clogging subsequent treatment equipment. Filter structure 2 includes a filter tube 201, a first filter screen 202, a first filter hole 203, a second filter screen 204, a second filter hole 205, and a filter slider 206. The filter tube 201 is horizontally positioned, and the wastewater cooled by the cooling structure 1 is passed into the filter tube 201 for filtration.

[0072] The first filter screen 202 is pivotally installed on the inner side wall of the filter pipe 201 (specifically, the first filter screen 202 is pivotally installed on the top of the inner side wall of the filter pipe 201). The filter slide block 206 is slidingly installed on the bottom of the inner side of the filter pipe 201 (specifically, a slide rail is fixed in the filter pipe 201 by a screw, the filter slide block 206 is slidingly installed on the slide rail, and a waterproof air cylinder connected with the filter slide block 206 is fixed in the filter pipe 201 to drive the filter slide block 206 to move in the filter pipe 201).

[0073] One side of the second filter screen 204 is pivotally installed on the bottom of the first filter screen 202, and the other side of the second filter screen 204 is pivotally installed on the filter slide block 206, so that when the waterproof air cylinder drives the filter slide block 206 to move, the inclination angle of the first filter screen 202 and the second filter screen 204 in the filter pipe 201 is changed.

[0074] The first filter hole 203 penetrates the first filter screen 202, and the second filter hole 205 penetrates the second filter screen 204. The cooled wastewater passes through the first filter screen 202 and the second filter screen 204, and larger solid impurities such as metal oxide skin and waste residue in the wastewater are intercepted on one side of the filter screen to avoid blocking subsequent equipment.

[0075] Figure 6 Three state diagrams of the filter screen are shown, Figure 6 The left side is a schematic diagram when normal filtering is performed. After a certain period of time, a layer of foreign matter is attached to the side close to the wastewater of the first filter screen 202 and the second filter screen 204, which reduces the filtering effect. At this time, the filter slide block 206 is moved to Figure 6 the middle state (at this time, the first filter screen 202 is in a vertical state), the foreign matter attached to the inner side of the first filter screen 202 falls on the second filter screen 204 under the action of gravity, and then the filter slide block 206 is moved to Figure 6 the right state (at this time, the second filter screen 204 is in a vertical state), the foreign matter on the inner side of the second filter screen 204 falls in the filter pipe 201 under the action of gravity, and the cleaning of the foreign matter on the surface of the filter screen can be automatically completed to avoid affecting the filtering effect.

[0076] The oil-water separation structure 3 includes an oil-water separation mechanism and an oil skimming mechanism. The oil-water separation mechanism is used to separate oil stains in the wastewater, and the oil skimming mechanism is used to skim off the separated oil stains.

[0077] As Figure 7The figure shows a cross-sectional view of an oil-water separation mechanism, which includes an oil-water separation tank 301, a partition 302, a first separation chamber 303, a second separation chamber 304, an inlet baffle 305, a through hole 306, a transition pipe 307, a transition baffle 308, and an outlet baffle 309. The partition 302 is vertically fixed inside the oil-water separation tank 301, thereby dividing the oil-water separation tank 301 into the first separation chamber 303 and the second separation chamber 304 (the first separation chamber 303 is used for preliminary separation of wastewater, and the second separation chamber 304 is used for secondary separation of wastewater).

[0078] The inlet baffle 305 is vertically fixed inside the first separation chamber 303 and close to the water inlet. The through hole 306 horizontally penetrates the partition 302. The transition pipe 307 is installed in the through hole 306 and is used to connect the first separation chamber 303 and the second separation chamber 304 (the transition pipe 307 is "L" shaped, with one end inserted into the through hole 306 and the other end extending to the bottom near the first separation chamber 303).

[0079] The filtered wastewater enters the first separation chamber 303 from the inlet side. The liquid level of the wastewater gradually rises in the first separation chamber 303. Since the oil is less dense, it floats on the upper surface of the wastewater. Under the action of the inlet baffle 305, the oil is collected between the inlet baffle 305 and the transition pipe 307, which makes it easier for the oil skimming mechanism to skim off the oil above.

[0080] Wastewater at the bottom of the first separation chamber 303 flows into the second separation chamber 304 through the transition pipe 307 for secondary oil removal (oil in the first separation chamber 303 accumulates between the inlet baffle 305 and the transition pipe 307, facilitating the skimming mechanism to remove the oil above). Figure 7 As shown, the lower surface of the inlet baffle 305 is higher than the lower surface of the transition pipe 307. When wastewater enters the first separation chamber 303, it ensures that most of the oil is collected in the first separation chamber 303, preventing a large amount of oil from transitioning from the transition pipe 307 to the second separation chamber 304, thus improving the oil removal effect of the wastewater.

[0081] The transition baffle 308 is fixed inside the second separation chamber 304 and close to the partition 302, and the outlet baffle 309 is vertically fixed inside the second separation chamber 304 and close to the outlet of the oil-water separator 301. Figure 7 As shown, the lower surface of the transition baffle 308 is higher than the lower surface of the outlet baffle 309 to ensure that the oil sludge from the secondary separation accumulates between the transition baffle 308 and the outlet baffle 309, thus preventing the oil sludge from being discharged from the outlet after the secondary separation.

[0082] like Figure 7 As shown, there are two sets of oil skimming mechanisms, installed in the first separation chamber 303 and the second separation chamber 304 respectively, used to skim off oil from the first separation chamber 303 and the second separation chamber 304.Figure 8 、 9 As shown in FIG. 3 and FIG. 4, each set of oil skimming mechanism includes an oil skimming shaft, an oil skimming disc, an oil skimming support plate 314, an oil guiding plate 315, a bearing seat 316, an oil scraping shaft 317, an oil scraping plate 318, an arc-shaped part 319, an oil scraping support frame 320, a worm 321 and a worm wheel 322. The oil skimming shaft is installed between the oil-water separation tank 301 and the partition plate 302 through bearings, and a motor is fixed to the side wall of the oil-water separation tank 301 and connected with the oil skimming shaft. The motor drives the rotation of the oil skimming shaft, thereby realizing oil skimming.

[0083] The oil skimming disc is sleeved on the oil skimming shaft and rotates synchronously with the oil skimming shaft. The oil skimming disc adheres the oil separated from the top of the separation chamber to its outer circumferential surface, and then the oil is scraped by the oil scraping plate 318 into the oil collecting groove. The oil skimming structures in the first separation chamber 303 and the second separation chamber 304 are completely identical, and the only difference is that the rotation speeds of the two oil skimming shafts are different (specifically, the rotation speed of the oil skimming shaft in the first separation chamber 303 is faster because more oil is accumulated in the first separation chamber 303, and the rotation speed of the oil skimming shaft in the second separation chamber 304 is slower).

[0084] The oil skimming support plate 314 is fixed in the separation chamber by welding, and the oil guiding plate 315 is fixed in the separation chamber at an angle. The oil guiding plate 315 and the oil skimming support plate 314 form an oil collecting groove therebetween for collecting the skimmed oil.

[0085] The bearing seat 316 is fixed on the top of the oil skimming support plate 314 by screw fastening, the oil scraping shaft 317 is rotatably installed between the bearing seats 316 by bearings, the oil scraping support frame 320 has a “]” shape, and the “]” shaped oil scraping support frame 320 is fixed to the outside of the oil-water separation tank 301 by welding, and the worm 321 is rotatably installed in the oil scraping support frame 320 under the drive of the motor.

[0086] The worm wheel 322 is installed at one end of the oil scraping shaft 317 by key connection and is engaged with the worm 321. The rotation of the worm 321 driven by the motor drives the rotation of the worm wheel 322 and the oil scraping shaft 317 (the self-locking performance of the worm 321 and the worm wheel 322 is utilized to realize the self-locking of the oil scraping shaft 317).

[0087] The oil scraping plate 318 is fixed on the oil scraping shaft 317. When the oil skimming disc rotates, the oil adhering to the outer circumferential surface of the oil skimming disc is scraped by the oil scraping plate 318 into the oil collecting groove. By adjusting the angle of the oil scraping shaft 317, the inclination angle of the oil scraping plate 318 can be adjusted, thereby scraping the oil of different thicknesses on the outer circumferential surface of the oil skimming disc. After the angle of the oil scraping plate 318 is adjusted, the angle change can be avoided under the self-locking action of the worm wheel 322 and the worm 321.

[0088] As shown in FIG. 3 and FIG. 4, each set of oil skimming mechanism includes an oil skimming shaft, an oil skimming disc, an oil skimming support plate 314, an oil guiding plate 315, a bearing seat 316, an oil scraping shaft 317, an oil scraping plate 318, an arc-shaped part 319, an oil scraping support frame 320, a worm 321 and a worm wheel 322. The oil skimming shaft is installed between the oil-water separation tank 301 and the partition plate 302 through bearings, and a motor is fixed to the side wall of the oil-water separation tank 301 and connected with the oil skimming shaft. The motor drives the rotation of the oil skimming shaft, thereby realizing oil skimming. Figure 9As shown, the arc-shaped portion 319 is arranged on the side of the oil scraping plate 318 close to the oil skimmer, so that the oil scraping plate 318 avoids the movement track of the oil skimmer and avoids interference and abrasion with the oil skimmer when scraping oil. Meanwhile, the center of the arc-shaped portion 319 is towards the oil skimmer, so that the oil dirt is prevented from gathering between the oil scraping plate 318 and the oil skimmer when scraping oil, and the effect of oil scraping is affected.

[0089] The separation process of the oil-water separation structure 3 is shown as follows:

[0090] Firstly, the filtered wastewater is introduced into the oil-water separation tank 301, and the oil dirt in the wastewater is separated twice and gathered in the first separation chamber 303 and the second separation chamber 304, respectively, and then the oil dirt on the surface of the wastewater is skimmed by the oil skimming mechanism into the oil collecting groove.

[0091] The flocculation and sedimentation structure 4 includes a stirring mechanism and a sedimentation mechanism, as shown in Figure 10 、 11 The stirring mechanism is shown in the structural schematic view, and the stirring mechanism includes a stirring tank 401, a driving bevel gear 402, a first driven bevel gear 403, a second driven bevel gear 404, a stirring shaft 405, a stirring frame 406, a stirring support plate 407, an outer stirring blade 408 and an inner stirring blade 409. The wastewater after oil-water separation is introduced into the stirring tank 401, and then a flocculating agent (such as polyaluminum chloride, polyacrylamide, etc.) is added into the stirring tank 401, which can help the suspended matter to coagulate into larger particles and be easily removed by sedimentation.

[0092] The flocculating agent and the sewage are fully mixed by stirring during flocculation to form uniform suspended agglomerates, thereby facilitating subsequent sedimentation and separation. The stirring motor is fixed outside the stirring tank 401, the driving bevel gear 402 is installed on the motor shaft of the stirring motor by key connection, and the driving bevel gear 402 is driven to rotate by the stirring motor.

[0093] The stirring shaft 405 is vertically installed in the stirring tank 401. Specifically, the top of the stirring shaft 405 is rotatably installed at the top of the stirring tank 401 by a bearing, the first driven bevel gear 403 is installed on the stirring shaft 405 by key connection and is engaged with the driving bevel gear 402, the first driven bevel gear 403 is driven to rotate by the driving bevel gear 402, and the stirring shaft 405 is driven to rotate.

[0094] The stirring support plate 407 is fixed in the stirring tank 401 by welding, the stirring frame 406 is rotatably installed on the stirring support plate 407 by a bearing, the middle part of the stirring frame 406 is vertically provided with a through hole, the stirring shaft 405 passes through the through hole, and the inner diameter of the through hole is greater than the diameter of the stirring shaft 405, so that the stirring shaft 405 and the stirring frame 406 are separated from each other and their movements do not interfere with each other.

[0095] The second driven bevel gear 404 is installed on the top of the stirring frame 406 by means of key connection and is engaged with the driving bevel gear 402. The second driven bevel gear 404 is driven to rotate by the driving bevel gear 402, thereby driving the stirring frame 406 to rotate.

[0096] As shown in Figure 10 , 11 , the first driven bevel gear 403 and the second driven bevel gear 404 are engaged with the driving bevel gear 402 respectively. Therefore, when the driving bevel gear 402 is driven to rotate by the stirring motor, the first driven bevel gear 403 and the second driven bevel gear 404 are driven to rotate synchronously, and the rotating directions of the first driven bevel gear 403 and the second driven bevel gear 404 are opposite (i.e. the rotating directions of the stirring shaft 405 and the stirring frame 406 are opposite, thereby improving the effect of wastewater flocculation and ensuring that the flocculant and the wastewater can be mixed fully).

[0097] The outer stirring blade 408 is integrally connected to the outer side of the stirring shaft 405, and the inner stirring blade 409 is integrally connected to the inner side of the stirring frame 406 (in actual stirring, the outer stirring blade 408 is driven to rotate by the stirring shaft 405, and the inner stirring blade 409 is driven to rotate by the stirring frame 406, thereby completing the stirring of the wastewater and the flocculant).

[0098] As shown in Figure 12 , the sedimentation structure includes a sedimentation tank 410, a sedimentation groove 411, a sludge discharge pipe 412 and an inclined plate 413. The sedimentation groove 411 is arranged at the bottom of the sedimentation tank 410 at intervals, and the sedimentation groove 411 is tapered, which facilitates the sedimentation and aggregation of sludge. The sludge discharge pipe 412 is connected to the bottom of the sedimentation groove 411 and is provided with a valve between the sedimentation groove 411, which is used for periodically discharging the sludge deposited in the sedimentation groove 411.

[0099] The inclined plate 413 is fixedly arranged at the top of the sedimentation tank 410 at intervals. The addition of the inclined plate 413 in the sedimentation tank 410 not only increases the sedimentation area but also shortens the sedimentation time. At the same time, the water flow between the plates changes from turbulent flow to laminar flow, which also improves the sedimentation efficiency.

[0100] The sludge after sedimentation is sent to the filter pressing structure 5 for filter pressing and water discharge, and the supernatant in the sedimentation tank 410 is adsorbed by the adsorption structure 6.

[0101] The filter pressing structure 5 is used for filter pressing and water discharge treatment of the sedimented sludge. The filter pressing structure 5 includes a filter pressing mechanism and a sludge conveying mechanism, as shown in Figures 13-16As shown, it is a structural schematic view of the filter press mechanism, which comprises an upper filter press frame 501, an upper tensioning roller 502, an upper tensioning cylinder 503, an upper tensioning plate 504, an upper avoiding groove 505, an upper supporting roller 506, an upper filter belt 507, an upper filter gear 508, an upper recovery roller 509, an upper scraper 510, a mud cutting frame 511, a gathering plate 512, a cutting knife 513, a paving plate 514, a lower filter press frame 515, a lower tensioning roller 516, a lower tensioning cylinder 517, a lower tensioning plate 518, a lower avoiding groove 519, a lower supporting roller 520, a lower filter belt 521, a lower filter gear 522, a lower recovery roller 523, a lower scraper 524, a receiving disc 525, a squeezing roller 526 and a protrusion 527.

[0102] The lower filter press frame 515 is fixed on the ground by screw fastening, the upper filter press frame 501 is fixed on the top of the lower filter press frame 515 by screw fastening, the upper filter belt 507 is rotatably installed on the upper filter press frame 501, and the lower filter belt 521 is rotatably installed on the lower filter press frame 515. The mud to be filtered and drained passes between the upper filter belt 507 and the lower filter belt 521, is squeezed to drain water, and forms filter cake, which is sent away by the mud sending mechanism.

[0103] The upper tensioning roller 502 is rotatably installed on one side of the upper filter press frame 501 and is used to tension the upper filter belt 507 from one side to avoid deformation of the upper filter belt 507 and affect the filtering effect. The cylinder body of the upper tensioning cylinder 503 is fixed on one side of the upper filter press frame 501, the piston rod of the upper tensioning cylinder 503 is connected with the upper tensioning plate 504, and the upper tensioning plate 504 is moved outward by the upper tensioning cylinder 503. The upper avoiding groove 505 penetrates the upper filter press frame 501, the upper tensioning shaft is fixed between the upper tensioning plates 504, and the upper tensioning shaft penetrates the upper avoiding groove 505. The upper avoiding groove 505 is arranged to avoid the tensioning track of the upper tensioning shaft and avoid interference between the two.

[0104] The upper tensioning roller 502 is sleeved on the upper tensioning shaft through a bearing to ensure smooth rotation of the upper tensioning roller 502. When the upper tensioning cylinder 503 drives the upper tensioning plate 504 to move outward, the upper tensioning shaft and the upper tensioning roller 502 are synchronously moved outward, thereby completing the tensioning of one side of the upper filter belt 507.

[0105] The upper recovery shaft is rotatably installed between the upper filter press frames 501 through a bearing, the upper recovery roller 509 is sleeved on the upper recovery shaft, and the upper filter gear 515 is sleeved on the upper recovery shaft and engaged with the lower filter gear 522. When the lower filter gear 522 drives the upper filter gear 515 to rotate, the upper recovery shaft and the upper recovery roller 509 are synchronously rotated, thereby driving the upper filter belt 507 to rotate and completing the filtering and draining of the mud.

[0106] The upper scraper 510 is fixed on one side of the upper filter frame 501 and faces the upper recovery roller 509. When the upper filter belt 507 rotates, the cake adhered to the surface of the upper filter belt 507 is scraped off by the upper scraper 510. The upper supporting roller 506 is rotatably installed between the upper filter frames 501 and is arranged at intervals to support the upper filter belt 507 and prevent the upper filter belt 507 from being deformed downward when receiving the sludge.

[0107] The upper filter belt 507 is arranged around the upper tensioning roller 502, the extrusion roller 526 and the upper recovery roller 509, and the upper filter belt 507 is provided with drainage holes to ensure smooth drainage of the extrusion water during filter extrusion.

[0108] The sludge cutting frame 511 is fixed on the top of the upper filter frame 501 by screw fastening and is arranged on the upper filter belt 507. The sludge cutting frame 511 is fixed on the bottom of the sludge cutting frame 511 and is arranged oppositely. The sludge cutting frame 511 is used to limit the sludge poured onto the upper filter belt 507 to prevent the sludge from flowing from both sides.

[0109] The paving plate 514 is adjustably installed on the bottom of the sludge cutting frame 511 and faces the upper filter belt 507. The paving plate 514 is used to evenly spread the sludge on the upper filter belt 507 to prevent local slurry from being too thick or too thin, thereby improving the filtering efficiency and quality (because the sludge poured on the upper filter belt 507 through the pipeline will form a cone shape, so the paving plate 514 is needed to spread it).

[0110] The sludge cutting frame 511 is provided with a through hole in the vertical direction. The top of the paving plate 514 is fixed with a guide column which is inserted into the through hole of the sludge cutting frame 511 by interference fit. The height of the paving plate 514 can be adjusted according to the actual situation, and the distance between the paving plate 514 and the upper filter belt 507 is adjusted to meet the spreading of sludge of different thicknesses.

[0111] The cutter 513 is fixed on the bottom of the sludge cutting frame 511 and faces the upper filter belt 507. When the upper filter belt 507 conveys the sludge forward, the sludge is cut into an elongated and narrow strip by the cutter 513. The water in the slurry can be more quickly and fully penetrated out of the upper filter belt 507, thereby improving the dewatering efficiency. Because the slurry is relatively viscous, if it is directly spread on the upper filter belt 507 as a whole, the water can only slowly separate from the surface, which is time-consuming and incomplete dewatering. If it is cut into a thinner layer, the migration path of the water is shortened, and the water is more easily discharged under the action of the capillary action and the pressing force of the filter cloth.

[0112] As Figure 16As shown, the cutter 513 is in the shape of "eight", and the cutter 513 distributed in the shape of "eight" can effectively cut and guide the sludge. And the cutter 513 is arranged in two groups side by side, and the two groups of cutters 513 are staggered in the horizontal direction, the first group of cutters 513 cuts the sludge preliminarily, and the second group of cutters 513 cuts the cut sludge again, so as to ensure that the size of the sludge is smaller and improve the effect of pressure filtration drainage.

[0113] As shown in Figure 16 As shown, the cutters 513 near one side of the upper tensioning roller 502 are distributed inward in a folding shape, that is, the cut sludge is folded again to avoid the sludge spreading to both sides (as shown in Figure 16 As shown, the conveying direction of the sludge is from right to left.

[0114] The lower tensioning roller 516 is rotatably installed on one side of the lower pressure filter frame 515, and is used to tension the lower pressure filter belt 521 from one side to avoid the deformation of the lower pressure filter belt 521 affecting the effect of pressure filtration. The cylinder body of the lower tensioning cylinder 517 is fixed on one side of the lower pressure filter frame 515, the piston rod of the lower tensioning cylinder 517 is connected with the lower tensioning plate 518, and the lower tensioning plate 518 is driven by the lower tensioning cylinder 517 to move outward. The lower avoiding groove 519 penetrates the lower pressure filter frame 515, the lower tensioning shaft is fixed between the lower tensioning plates 518, and the lower tensioning shaft penetrates the lower avoiding groove 519. The lower avoiding groove 519 is arranged to avoid the tensioning track of the lower tensioning shaft, so as to avoid interference between the two.

[0115] The lower tensioning roller 516 is sleeved on the lower tensioning shaft through a bearing, so as to ensure the smooth rotation of the lower tensioning roller 516. When the lower tensioning cylinder 517 drives the lower tensioning plate 518 to move outward, the lower tensioning shaft and the lower tensioning roller 516 will move outward synchronously, so as to complete the tensioning of one side of the lower pressure filter belt 521.

[0116] The lower recovery shaft is rotatably installed between the lower pressure filter frames 515 through a bearing, the lower recovery roller 523 is sleeved on the lower recovery shaft, and the lower pressure filter gear 522 is sleeved on the lower recovery shaft and engaged with the upper pressure filter gear 515. When the lower pressure filter gear 522 rotates, the lower recovery shaft and the lower recovery roller 523 will rotate synchronously, and then the lower pressure filter belt 521 will rotate, so as to complete the pressure filtration drainage of the sludge (when the lower pressure filter gear 522 rotates, the upper pressure filter gear 515 will rotate synchronously. Since the rotation directions of the lower pressure filter gear 522 and the upper pressure filter gear 515 are opposite, the rotation directions of the upper pressure filter belt 507 and the lower pressure filter belt 521 are opposite, and then the sludge between the two is subjected to pressure filtration drainage).

[0117] The lower scraper 524 is fixed on one side of the lower pressing frame 515 and faces the lower recovery roller 523. When the lower pressing belt 521 rotates, the cake adhered to the surface of the lower pressing belt 521 is scraped off by the lower scraper 524. The lower supporting roller 520 is rotatably installed between the lower pressing frames 515 and is arranged at intervals to support the lower pressing belt 521 and prevent the lower pressing belt 521 from being deformed downward when receiving the sludge.

[0118] The lower pressing belt 521 is arranged around the lower tensioning roller 516, the extrusion roller 526 and the lower recovery roller 523, and the lower pressing belt 521 is provided with drainage holes to ensure smooth drainage of the extrusion water.

[0119] The extrusion roller 526 is rotatably installed at the bottom of the lower pressing frame 515 through a bearing, and the outer periphery of the extrusion roller 526 is annularly provided with protrusions 527. The protrusions 527 are arranged to increase the friction and improve the extrusion dewatering effect, thereby preventing the extrusion roller 526 from slipping and affecting the drainage.

[0120] As shown in Figure 15 The upper pressing belt 507 and the lower pressing belt 521 are arranged around the extrusion roller 526. The sludge falls from the upper pressing belt 507 to the lower pressing belt 521, and then the upper pressing belt 507 and the lower pressing belt 521 jointly clamp the sludge to pass around the extrusion roller 526, thereby completing the pressure filtration and drainage of the sludge.

[0121] The receiving disc 525 is fixed at the bottom of the upper pressing frame 501 and the lower pressing frame 515 by welding and is used to receive the water extruded by the upper pressing belt 507 and the lower pressing belt 521. The receiving disc 525 is conical, and the bottom of the receiving disc 525 is provided with a drainage pipe for draining the received water.

[0122] The principle of pressure filtration and drainage of the pressure filtration mechanism is as follows:

[0123] The sludge is poured from the pipeline onto the upper pressing belt 507. When the upper pressing belt 507 conveys the sludge, it is first subjected to gravity drainage, and at the same time, the sludge is scraped flat by the paving plate 514 and cut into a narrow strip by the cutter 513. The sludge on the upper pressing belt 507 falls onto the lower pressing belt 521, and then the upper pressing belt 507 and the lower pressing belt 521 jointly clamp the sludge to pass around the extrusion roller 526, thereby completing the pressure filtration and drainage of the sludge.

[0124] As shown in Figures 17-19As shown, the mud feeding mechanism is located on one side of the filter press mechanism and is used to transport the filtered mud cake. The mud feeding mechanism includes a mud feeding frame 528, a mud feeding roller 529, a mud feeding belt 530, a pull plate 531, a pull column 532, an upper limit rod 533, a lower limit rod 534, a limit groove 535, and a guide part 536. The mud feeding frame 528 is fixed on the workshop floor. The mud feeding roller 529 is rotatably mounted between the mud feeding frames 528 via bearings. The mud feeding belt 530 is wound around the mud feeding roller 529. The motor is fixed to the outside of the mud feeding frame 528 and connected to the mud feeding roller 529. The motor drives the mud feeding roller 529 to rotate, which in turn drives the mud feeding belt 530 to rotate, thus completing the transport of the mud cake.

[0125] The upper limit rod 533 and the lower limit rod 534 are fixed to the top of the mud feeding frame 528 by aluminum profiles, and the upper limit rod 533 is located directly above the lower limit rod 534. A limit groove 535 is formed between the upper limit rod 533 and the lower limit rod 534 (the upper limit rod 533 and the lower limit rod 534 are located above the mud feeding belt 530 and are used to drag the tie column 532).

[0126] Pull plates 531 are fixed at intervals on the outer circumference of the mud conveying belt 530. When the mud conveying roller 529 drives the mud conveying belt 530 to rotate, it will drive the pull plates 531 to rotate synchronously. Pull columns 532 are fixed on the outside of the pull plates 531 and cooperate with the limiting groove 535. When the mud conveying belt 530 rotates, when the pull plates 531 rotate to the top, the pull columns 532 move into the limiting groove 535. At this time, the lower limiting rod 534 supports the pull columns 532. The pull columns 532 and the pull plates 531 pull the mud conveying belt 530 upward, preventing the mud conveying belt 530 from deforming downward under gravity when conveying mud cake.

[0127] The guide part 536 is inclinedly set at both ends of the upper limit rod 533 and the lower limit rod 534 to guide the pull column 532 entering and ensure that the pull column 532 can smoothly enter the limit groove 535.

[0128] like Figures 20-23 The diagram shows a schematic of the adsorption structure 6. The adsorption structure 6 is used to adsorb the upper clear liquid at the top of the sedimentation tank 410. The adsorption structure 6 includes an adsorption box 601, a through channel 602, a guide channel 603, a push plate 604, an insert plate 605, a guide strip 606, an installation groove 607, an adsorption plate 608, a first magnet 609, a second magnet 610, a sealing groove 611, a spring groove 612, a compression spring 613, a pressure plate 614, a sealing strip 615, and a positioning groove 616. The through channel 602 is located on one side of the adsorption box 601. The insert plate 605 is integrally connected to the push plate 604 on the side near the adsorption box 601 and cooperates with the through channel 602. When adsorbing the upper clear liquid, the insert plate 605 is simply inserted into the through channel 602.

[0129] The guide groove 603 is arranged at the top and bottom of the through groove 602, the guide strip 606 is integrally connected to the top and bottom of the plug plate 605, and is matched with the guide groove 603, when the plug plate 605 is inserted into the through groove 602, the guide strip 606 is inserted into the guide groove 603. By arranging the matched guide strip 606 and guide groove 603, the inserted plug plate 605 is guided.

[0130] The installation groove 607 is arranged at one side of the plug plate 605, the adsorption plate 608 (activated carbon plate) is embedded in the installation groove 607, and the upper layer of the liquid is adsorbed. The handle is fixed to the side of the push plate 604 away from the plug plate 605, which facilitates the worker to pull the plug plate 605, and then replace the adsorption plate 608.

[0131] As shown in Figure 23 The sealing groove 611 is arranged at one side of the adsorption box 601 close to the plug plate 605 and symmetrically arranged at both sides of the through groove 602, the spring groove 612 is arranged at the inner side of the sealing groove 611, and the compression spring 613 is arranged in the spring groove 612. The pressing plate 614 is installed in the sealing groove 611 and abuts against the compression spring 613, and the sealing strip 615 is fixed to the side of the pressing plate 614 away from the compression spring 613. The positioning groove 616 is arranged at one side of the push plate 604 close to the adsorption box 601, and is matched with the sealing strip 615 to position the sealing strip 615.

[0132] The first magnet 609 is fixed to one side of the plug plate 605 close to the adsorption box 601, and the second magnet 610 is fixed to the inner side of the adsorption box 601 and matched with the first magnet 609. In actual plug-in, the adsorption force of the first magnet 609 and the second magnet 610 ensures the reliability of the plug plate 605.

[0133] When the plug plate 605 is inserted into the through groove 602, the second magnet 610 adsorbs the first magnet 609 inward, at this time, the push plate 604 will be pressed against the sealing strip 615 and the pressing plate 614 to compress the compression spring 613, and the compression spring 613 will be pressed and deformed. Under the action of the compression spring 613 in the opposite direction, the sealing strip 615 will be pressed against the pressing plate 614 outward, and the sealing ability between the push plate 604 and the adsorption box 601 is improved.

[0134] The treatment process of the heat treatment wastewater treatment system is as follows:

[0135] Firstly, the cooling structure 1 cools the wastewater generated in the heat treatment process to normal temperature or lower temperature, so that the subsequent treatment equipment can operate normally and prolong the service life; then the filter structure 2 filters out the solid impurities (such as metal oxide skin, waste residue, etc.) in the wastewater, and the oil-water separation structure 3 separates the oil and water in the wastewater to remove the oil stains contained in the wastewater; Next, flocculating agent is added to the wastewater for flocculation and precipitation, the sludge precipitated is filtered by the filter press structure 5, and the upper clear liquid can be reused after being adsorbed by the adsorption structure 6, without polluting the environment, saving water resources and saving cost.

[0136] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A thermal treatment wastewater treatment system, characterized by, It includes: A cooling structure (1) for cooling wastewater; A filtering structure (2) for filtering the cooled wastewater, the filtering structure (2) comprising a filtering pipe (201), a first filter screen (202) rotatably installed on the inner side wall of the filtering pipe (201), a filtering sliding block (206) slidingly installed on the inner side wall of the filtering pipe (201), and a second filter screen (204) rotatably connected to the first filter screen (202) on one side and rotatably connected to the filtering sliding block (206) on the other side; The filtering structure (2) has three states: State one: the first filter screen (202) and the second filter screen (204) are inclinedly arranged; State two: the first filter screen (202) is vertically arranged, and the second filter screen (204) is inclinedly arranged; State three: the second filter screen (204) is vertically arranged, and the first filter screen (202) is inclinedly arranged; An oil-water separation structure (3) comprising an oil-water separation mechanism for separating oil stains in wastewater and an oil skimming mechanism installed on the top of the oil-water separation mechanism for skimming off oil stains separated on the surface of the wastewater; The oil skimming mechanism comprises an oil skimming shaft rotatably installed on the oil-water separation mechanism, an oil skimming disc spacedly sleeved on the oil skimming shaft, and an oil scraping plate (318) angularly adjustably installed on one side of the oil skimming disc, the oil scraping plate (318) being used for scraping off oil stains of different thicknesses adhered to the outer peripheral surface of the oil skimming disc; A flocculation and sedimentation structure (4) comprising a stirring mechanism and a sedimentation mechanism installed on one side of the stirring mechanism; A pressure filtration structure (5) comprising a pressure filtration mechanism for pressure filtering and draining the sedimented sludge and a sludge conveying mechanism for conveying the pressure-filtered sludge cake; The pressure filtration mechanism comprises an upper pressure filtration belt (507) and a lower pressure filtration belt (521) with opposite rotating directions, and the sedimented sludge is pressure filtered and drained between the upper pressure filtration belt (507) and the lower pressure filtration belt (521) to form a sludge cake; The sludge conveying mechanism comprises a sludge conveying frame (528), a sludge conveying roller (529) rotatably installed on the sludge conveying frame (528), a sludge conveying belt (530) wound between the sludge conveying rollers (529), and an anti-falling assembly for preventing the sludge conveying belt (530) from falling; The anti-falling assembly comprises an upper limiting rod (533) and a lower limiting rod (534) installed above the sludge conveying frame (528), a limiting groove (535) formed between the upper limiting rod (533) and the lower limiting rod (534), a pull plate (531) fixed at intervals on the outer peripheral surface of the sludge conveying belt (530), and a pull column (532) fixed outside the pull plate (531), when the sludge conveying belt (530) conveys the pressure-filtered sludge cake, the pull column (532) is placed in the limiting groove (535); An adsorption structure (6) for adsorbing the supernatant after the sedimentation of the sedimentation mechanism.

2. The thermal treatment wastewater treatment system of claim 1, wherein: The cooling structure (1) comprises a cooling box (102), cooling pipes installed in the cooling box (102), and a spray pipe arranged above the cooling pipes and used for cooling and cooling treatment of wastewater in the cooling pipes.

3. A thermal treatment wastewater treatment system according to claim 2, wherein: The cooling pipes comprise cooling main pipes (111) and cooling auxiliary pipes (112) which are installed between the cooling main pipes (111) and staggered in the vertical direction. The spray pipe comprises a spray main pipe (106), a spray auxiliary pipe (107) connected with the spray main pipe (106), spray holes (108) arranged at the bottom of the spray auxiliary pipe (107) at intervals, and a winding pipe (110) integrally connected with the spray auxiliary pipe (107), one end of the winding pipe (110) being close to the spray main pipe (106), and the other end of the winding pipe (110) being away from the spray main pipe (106).

4. The thermal treatment wastewater treatment system of claim 1, wherein: The stirring mechanism comprises a stirring box (401), stirring shafts (405) and stirring frames (406) installed in the stirring box (401) in opposite directions, outer stirring blades (408) integrally connected with the outside of the stirring shafts (405), and inner stirring blades (409) integrally connected with the inside of the stirring frames (406).

5. The thermal treatment wastewater treatment system of claim 1, wherein: The adsorption structure (6) comprises an adsorption box (601), a plug-in plate (605) installed on one side of the adsorption box (601), an adsorption plate (608) installed in the plug-in plate (605), and a sealing mechanism arranged between the plug-in plate (605) and the adsorption box (601).

6. A thermal treatment wastewater treatment system according to claim 5, wherein: The sealing mechanism comprises a push plate (604) fixed on the side of the plug-in plate (605) away from the adsorption box (601), an elastic member arranged on one side of the adsorption box (601), and a sealing member abutting against the elastic member, when the push plate (604) abuts against the adsorption box (601), the sealing member abuts against the inside of the push plate (604) under the action of the elastic member.

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