Energy-saving coal-containing wastewater treatment equipment

Abstract

This invention relates to the field of wastewater treatment equipment technology, and provides an energy-saving coal-containing wastewater treatment device, including a treatment tank. The treatment tank is divided into a clear water zone, a sedimentation separation zone, a cyclone flocculation zone, and a sludge thickening zone from top to bottom. A cyclone inlet pipe tangentially connects to the cyclone flocculation zone is provided on the side wall of the treatment tank. A clear water outlet pipe is provided at the top of the treatment tank, and a coal powder sludge discharge pipe is provided at the bottom of the treatment tank. A reagent inlet pipe is located at the top of the side of the treatment tank away from the cyclone inlet pipe, and the reagent inlet pipe is connected to a reagent dosing device. The cyclone flocculation zone is equipped with a cyclone guiding component and a micro-flocculation disturbance component. The sedimentation separation zone is equipped with a variable-pitch inclined plate component and a rotating self-cleaning component. The sludge thickening zone is equipped with a thickening propeller. A residual energy recovery turbine is located at the front end of the cyclone inlet pipe, and the residual energy recovery turbine is connected to a micro-generator. This device enables large particles to settle in the upper section and small particles to undergo dense separation in the lower section.

Description

Technical Field

[0001] This invention is an energy-saving coal-containing wastewater treatment device, belonging to the technical field of wastewater treatment equipment. Background Technology

[0002] Coal-containing wastewater generated by power plants and coal mines mainly comes from the flushing drainage of coal conveyor bridges, coal yard roads, and boiler rooms. Coal-containing wastewater contains a large amount of suspended solids, a small amount of organic matter, and bacteria. The main component of the suspended solids is coal dust. Because the suspended coal dust particles in coal-containing wastewater are small and their specific gravity is similar to that of water, it is difficult for them to settle naturally by gravity, which brings certain difficulties to the treatment of coal-containing wastewater.

[0003] In the existing technology, traditional treatment equipment for treating coal-containing wastewater has the following drawbacks: First, it relies solely on gravity for natural sedimentation, resulting in slow sedimentation speed, long residence time, and a huge footprint; second, inclined plates or tubes are easily clogged by fine coal powder, requiring manual cleaning after shutdown, leading to frequent maintenance and high operating costs; third, uneven flocculation and mixing prevent effective destabilization of fine coal powder, resulting in incomplete solid-liquid separation and high turbidity of the effluent. Summary of the Invention

[0004] In view of the shortcomings of existing technologies, the purpose of this invention is to provide an energy-saving coal-containing wastewater treatment device.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: An energy-saving coal-containing wastewater treatment device includes a treatment tank, which is divided into a clear water zone, a sedimentation and separation zone, a cyclone flocculation zone, and a sludge thickening zone from top to bottom. A cyclone inlet pipe tangentially connected to the cyclone flocculation zone is provided on the side wall of the treatment tank. A clear water outlet pipe is provided at the top of the treatment tank, and a coal powder sludge discharge pipe is provided at the bottom of the treatment tank. A reagent inlet pipe is provided at the top of the side of the treatment tank away from the cyclone inlet pipe, and the reagent inlet pipe is connected to a reagent dosing device. The cyclone flocculation zone is equipped with a cyclone guiding component and a micro-flocculation disturbance component. The system includes: a variable-pitch inclined plate assembly and a rotary self-cleaning assembly in the sedimentation separation zone; a thickening propeller in the sludge thickening zone; a wastewater inlet pipe with a waste energy recovery turbine at the front end of the cyclone inlet pipe connected to a micro generator; a wastewater inlet pipe at the rear end of the cyclone inlet pipe; a rotary motor at the top center of the treatment tank with a drive shaft at its output end; the drive shaft penetrates the interior of the treatment tank and is mechanically linked to the micro-flocculation disturbance assembly and the rotary self-cleaning assembly; and a thickening propeller fitted at the bottom of the drive shaft.

[0006] Optionally, the swirl inlet pipe is provided with a waterproof and breathable membrane on the side away from the residual energy recovery turbine.

[0007] Furthermore, the swirl guiding assembly includes a swirl guiding channel, which is fixed in the lower part of the swirl flocculation zone. An interlayer is provided inside the swirl guiding channel. A micro-driver is provided on the upper side of the interlayer. The output end of the micro-driver is connected to a gear. A rotating ring is provided below the gear and is fitted onto the inner wall of the interlayer. A toothed gear meshing with the gear is provided on the top side of the rotating ring. Several limiting rods are evenly inserted on the rotating ring. Each limiting rod passes through the rotating ring and the interlayer, and its inner end is provided with an outer connecting rod. A slot is provided on the inner side of the outer connecting rod, and a swirl guiding plate is provided in the slot. An inner connecting rod is provided at the center of the inner side of the swirl guiding plate. The side of the inner connecting rod away from the swirl guiding plate is movably connected to the side of an inner disc. The inner disc is fitted onto the drive shaft. A limiting rod two is provided on the lower side of the inner wall of the interlayer corresponding to the limiting rod one. A loop-shaped guide ring is provided on the limiting rod two, and the limiting rod one passes through the loop-shaped guide ring.

[0008] Furthermore, a sealing ring is provided at the end of the external connecting rod that contacts the interlayer.

[0009] Furthermore, the micro-flocculation disturbance component includes an annular track fixed to the top side of the swirl guide channel. Several slidingly fitted sliders are provided inside the annular track. A drive arm is provided on the top of the slider. The top of the drive arm is movably connected to the bottom outer end of the polygonal rotating plate on the side away from the slider. The polygonal rotating plate is sleeved on the drive spindle. Each top outer end of the polygonal rotating plate is provided with a support rod. The top of the support rod is provided with disturbance blades.

[0010] Furthermore, the disturbance blade has a flexible arc-shaped structure.

[0011] Furthermore, the variable pitch ramp assembly includes multiple ramps, the spacing between adjacent ramps gradually decreases from top to bottom, and the surface of the ramps is provided with a superhydrophobic coating.

[0012] Furthermore, the rotary self-cleaning assembly includes the same number of outer shafts as the inclined plate. The outer shafts are sleeved on the drive spindle and located above the inclined plate. A cleaning disc is provided at the bottom of the outer shaft. A sleeve is sleeved on the outer shaft. Several L-shaped bends are provided on the outside of the sleeve. A mounting seat one is provided at the end of the L-shaped bends away from the sleeve. An elastic hinge support and reset structure is provided at the bottom of the mounting seat one. A mounting seat two is provided at the bottom of the elastic hinge support and reset structure. A brush plate is provided at the bottom of the mounting seat two.

[0013] Furthermore, the elastic hinged support reset structure consists of a hinge support and a torsion spring.

[0014] Furthermore, the swirl inlet pipe is provided with a central shaft connected to the shaft of the waste energy recovery turbine. A lower retaining ring, a spring, a washer ring, a windmill and an upper retaining ring are sequentially fitted on the central shaft. The upper retaining ring is provided with a number of filter holes.

[0015] The beneficial effects of this invention are: The system employs variable-pitch inclined plates with decreasing spacing from top to bottom, combined with a self-cleaning brush plate with elastic hinge support, to achieve sedimentation of large particles in the upper section and dense separation of small particles in the lower section. At the same time, the brush plate always elastically fits the inclined plate, automatically cleaning impurities from the inclined plate surface, avoiding clogging of the inclined plate, and reducing maintenance costs.

[0016] By synchronously driving flocculation, self-cleaning, and concentration with a single drive spindle, the system achieves the effects of micro-flocculation disturbance, rotary self-cleaning, and bottom sludge concentration, resulting in a simple structure, low energy consumption, and reduced failure rate.

[0017] By adjusting the angle of the swirl guide plate, the swirl intensity can be adjusted according to the coal powder concentration, which has strong resistance to water quality fluctuations and a wider range of applications.

[0018] By incorporating a buffer spring, impeller, and filter holes within the vortex inlet pipe, the system achieves impurity filtration, axial buffering, and turbine vibration damping protection, significantly improving the equipment's lifespan and stability.

[0019] The kinetic energy of the incoming water is recovered and used to generate electricity through a turbine, achieving energy reuse and realizing high efficiency and energy saving. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of an energy-saving coal-containing wastewater treatment device according to the present invention. Figure 2 This is a schematic diagram of the overall internal structure of an energy-saving coal-containing wastewater treatment device according to the present invention; Figure 3 This is a schematic diagram of the connection structure between the swirl guiding component and the micro-flocculation disturbance component of an energy-saving coal-containing wastewater treatment device according to the present invention; Figure 4 This is a schematic diagram of the swirl guide component structure of an energy-saving coal-containing wastewater treatment device according to the present invention; Figure 5 This is a schematic diagram of the micro-flocculation disturbance component structure of an energy-saving coal-containing wastewater treatment equipment according to the present invention; Figure 6 This is a schematic diagram of the rotating self-cleaning component structure of an energy-saving coal-containing wastewater treatment device according to the present invention; Figure 7 This is a schematic diagram of the internal structure of the vortex inlet pipe of an energy-saving coal-containing wastewater treatment device according to the present invention.

[0022] In the diagram, 1. Treatment tank; 101. Clear water zone; 102. Sedimentation and separation zone; 103. Cyclone flocculation zone; 104. Sludge thickening zone; 2. Cyclone inlet pipe; 201. Central shaft; 202. Lower retaining ring; 203. Spring; 204. Washer ring; 205. Impeller; 206. Upper retaining ring; 207. Filter hole; 3. Clear water outlet pipe; 4. Coal powder sludge discharge pipe; 5. Chemical inlet pipe; 6. Chemical dosing device; 7. Cyclone guide assembly; 701. Cyclone guide channel; 702. Jacket; 703. Gear; 704. Rotating ring; 705. Gear tooth; 706. Limiting rod one; 707. External connecting rod; 708. Cyclone guide plate; 709. Internal connecting rod; 710. Inner plate; 71 2. Limiting rod II; 713. Guide ring; 8. Micro-flocculation disturbance assembly; 801. Circular track; 802. Slider; 803. Drive arm; 804. Multi-angle rotating plate; 805. Support rod; 806. Disturbance blade; 9. Variable pitch inclined plate assembly; 901. Inclined plate; 10. Rotary self-cleaning assembly; 1001. Outer shaft; 1002. Cleaning disc; 1003. Sleeve; 1004. L-shaped bend; 1005. Mounting base I; 1006. Elastic hinged support reset structure; 1007. Mounting base II; 1008. Brush plate; 11. Concentrating propeller; 12. Waste energy recovery turbine; 13. Micro generator; 14. Wastewater inlet pipe; 15. Rotary motor; 16. Drive spindle. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1-7This invention provides an energy-saving coal-containing wastewater treatment equipment solution, including a treatment tank 1. The treatment tank 1 is divided into a clear water zone 101, a sedimentation and separation zone 102, a cyclone flocculation zone 103, and a sludge thickening zone 104 from top to bottom. A cyclone inlet pipe 2 is provided on the side wall of the treatment tank 1, tangentially connected to the cyclone flocculation zone 103. A clear water outlet pipe 3 is provided at the top of the treatment tank 1, and a coal powder sludge discharge pipe 4 is provided at the bottom of the treatment tank 1. A reagent inlet pipe 5 is provided on the top of the side of the treatment tank 1 away from the cyclone inlet pipe 2, and the reagent inlet pipe 5 is connected to a reagent dosing device 6. A cyclone guiding component 7 and a micro-flocculation disturbance are provided within the cyclone flocculation zone 103. The settling separation zone 102 is equipped with a variable pitch inclined plate assembly 9 and a rotary self-cleaning assembly 10; the sludge thickening zone 104 is equipped with a thickening propeller 11; the front end of the cyclone inlet pipe 2 is equipped with a residual energy recovery turbine 12, which is connected to a micro generator 13, and the rear end of the cyclone inlet pipe 2 is equipped with a wastewater inlet pipe 14; a rotary motor 15 is located at the top center of the treatment tank 1, and the output end of the rotary motor 15 is equipped with a drive shaft 16, which penetrates the interior of the treatment tank 1 and is mechanically linked with the micro-flocculation disturbance assembly 8 and the rotary self-cleaning assembly 10; the thickening propeller 11 is fitted at the bottom of the drive shaft 16. Optionally, a waterproof and breathable membrane is provided on the side of the cyclone inlet pipe 2 away from the residual energy recovery turbine 12. When the waterproof and breathable membrane is provided on the cyclone inlet pipe 2 near the wastewater inlet pipe 14, the coal-containing wastewater enters directly into the cyclone flocculation zone 103 after entering from the wastewater inlet pipe 14. The micro generator 13 drives the turbine to run, and drives the impeller 205 to rotate through the central shaft 201. The generated power impacts the internal coal-containing wastewater, and the coal-containing wastewater generates vortices that impact the inner wall of the treatment tank 1. The internal disturbance blades 806 are affected and shake and rotate. When the end of the cyclone inlet pipe 2 is not equipped with a waterproof and breathable membrane, the coal-containing wastewater enters from the wastewater inlet pipe 14 and flows into the cyclone inlet pipe 2. Under the filtration of the filter holes 207, coal powder particles are intercepted. The wastewater impacts the impeller 205. After the impeller 205 rotates, it drives the central shaft 201 to rotate. The central shaft 201 will drive the waste energy recovery turbine 12. It uses its own inlet water pressure to drive the turbine to generate electricity, converting the originally wasted kinetic energy into electrical energy for equipment control, lighting or auxiliary drive, which has energy saving.

[0025] See Figure 3 , Figure 4The swirl guiding assembly 7 includes a swirl guiding groove 701, which is fixed in the lower part of the swirl flocculation zone 103. A sandwich layer 702 is provided inside the swirl guiding groove 701. A micro-actuator is provided on the upper side of the sandwich layer 702. The output end of the micro-actuator is connected to a gear 703. A rotating ring 704 is provided below the gear 703 and is fitted onto the inner wall of the sandwich layer 702. A tooth 705 meshing with the gear 703 is provided on the top side of the rotating ring 704. Several limiting rods 706 are evenly inserted into the rotating ring 704, passing through the rotating ring 704 and the sandwich layer 702. An outer connecting rod 707 is provided at the inner end. A slot is provided on the inner side of the outer connecting rod 707. A swirl guide plate 708 is provided in the slot. An inner connecting rod 709 is provided at the center of the inner side of the swirl guide plate 708. The side of the inner connecting rod 709 away from the swirl guide plate 708 is movably connected to the side of the inner disk 710. The inner disk 710 is sleeved on the drive spindle 16. A second limiting rod 712 is provided on the lower side of the inner wall of the interlayer 702 corresponding to the first limiting rod 706. A loop guide ring 713 is provided on the second limiting rod 712. The first limiting rod 706 passes through the loop guide ring 713. A sealing ring is provided at the contact end of the outer connecting rod 707 and the interlayer 702.

[0026] See Figure 5 The micro-flocculation disturbance component 8 includes an annular track 801 fixed to the top side of the swirling guide channel 701. Several slidingly engaged sliders 802 are arranged within the annular track 801. A drive arm 803 is located at the top of each slider 802. The top of the drive arm 803, away from the slider 802, is movably connected to the bottom outer end of a polygonal rotating plate 804. The polygonal rotating plate 804 is fitted onto a drive shaft 16. Each top outer end of the polygonal rotating plate 804 is provided with a support rod 805. A disturbance blade 806, which is a flexible arc-shaped structure, is located at the top of each support rod 805. The drive shaft 16 directly drives the polygonal rotating plate 804, forming a planetary disturbance through the drive arm 803 and the sliders 802.

[0027] See Figure 2 , Figure 6The variable-pitch inclined plate assembly 9 includes multiple inclined plates 901, with the spacing between adjacent inclined plates 901 gradually decreasing from top to bottom to form a gradient settling channel. The surface of the inclined plates 901 is coated with a superhydrophobic coating. The rotating self-cleaning assembly includes the same number of outer shafts 1001 as the inclined plates 901. The outer shafts 1001 are sleeved on the drive spindle 16 and located above the inclined plates 901. A cleaning disc 1002 is provided at the bottom of the outer shafts 1001, and a sleeve 10 is sleeved on the outer shafts 1001. 03. Several L-shaped bends 1004 are provided on the outer side of the sleeve 1003. The end of the L-shaped bend 1004 away from the sleeve is provided with a mounting seat 1005. The bottom of the mounting seat 1005 is provided with an elastic hinge support and reset structure 1006. The bottom of the elastic hinge support and reset structure 1006 is provided with a mounting seat 2 1007. The bottom of the mounting seat 2 1007 is provided with a brush plate 1008. The elastic hinge support and reset structure 1006 is composed of a hinge support and a torsion spring.

[0028] See Figure 7 The vortex inlet pipe 2 is provided with a central shaft 201 connected to the shaft of the waste energy recovery turbine 12. The central shaft 201 is provided with a lower retaining ring 202, a spring 203, a gasket 204, a wind turbine 205 and an upper retaining ring 206 in sequence from the waste energy recovery turbine 12 to the treatment tank 1. The upper retaining ring 206 is provided with a number of filter holes 207.

[0029] The circuits and electronic components, modules and controllers, or the heat dissipation holes and maintenance doors in the space of the adapted electrical equipment are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated. The content protected by this application does not involve improvements to software and methods or heat dissipation and maintenance.

[0030] In operation, coal-containing wastewater enters the cyclone inlet pipe 2 through the wastewater inlet pipe 14, is filtered through the filter holes 207, and then impacts the impeller 205, driving the central shaft 201 to rotate and powering the waste energy recovery turbine 12 to generate electricity, thus achieving energy recovery. The wastewater enters the cyclone flocculation zone 103 tangentially, forming a stable cyclone field under the action of the cyclone guide plate 708. Coal powder gathers towards the tank wall and is pre-separated under centrifugal force. The reagent is added by the reagent dosing device 6 and quickly and evenly mixes with the wastewater under the action of the micro-flocculation disturbance component 8 to form dense flocs. The flocs enter the sedimentation separation zone 102 and settle step by step between the multi-layer variable-pitch inclined plates 901 with decreasing spacing. The superhydrophobic coating on the surface of the inclined plates 901 reduces coal powder adhesion. The brush plate 1008 of the rotating self-cleaning component 10 always adheres to the surface of the inclined plates 901 under the action of elastic hinge support, automatically cleaning and avoiding clogging. After settling, the coal powder enters the sludge thickening zone 104, where it is squeezed and thickened by the thickening propeller 11, and finally discharged through the coal powder sludge discharge pipe 4; the supernatant rises to the clear water zone 102 and is discharged through the clear water outlet pipe 3.

[0031] Specifically, the rotary motor 15 is started and runs, which drives the drive shaft 16 to rotate. After the drive shaft 16 rotates, it drives the polygonal rotating plate 804 to rotate. The disturbance blades 806 at the top outer end of the polygonal rotating plate 804 rotate together in the swirl flocculation zone 103. The slider 802 slides in the annular track 801. The reagent and wastewater are quickly and evenly mixed. The flexible arc-shaped blades do not break the flocs, and the dense large flocs are quickly formed, which greatly improves the settling performance. The wastewater enters the swirl flocculation zone 103 tangentially through the swirl inlet pipe 2 and forms a stable swirling field under the guidance of the swirl guide plate 708. The coal powder is thrown towards the tank wall under the action of centrifugal force, achieving preliminary pre-separation. Large coal powder particles settle directly downwards.

[0032] When the micro-drive is started, it drives the gear 703 to rotate. The gear 703 drives the meshing gear 705 below, which in turn drives the rotating ring 704 to rotate on the inner wall of the interlayer 702. The inner wall of the rotating ring 704 is provided with guide protrusions, and the inner wall of the interlayer 702 is provided with guide grooves that match the guide protrusions. When the rotating ring 704 rotates, the limiting rod 706 inserted on the rotating ring 704 drives the loop guide ring 713 to flip. The loop guide ring 713 drives the limiting rod 712 at one end to flip at an angle. After the limiting rod 712 flips at an angle, it drives the outer connecting rod 707 to rotate, which in turn drives the swirl guide plate 708 connected to the inner end to flip, so that the swirl intensity can be adjusted to adapt to wastewater of different concentrations.

[0033] The flocs enter the settling and separation zone 102 and flow through multiple inclined plates 901. The inclined plates 901 are filter plates, and the spacing between them gradually decreases from top to bottom, forming a gradient settling channel that intercepts fine flocs step by step. The superhydrophobic coating on the surface of the inclined plates 901 reduces coal powder adhesion, resulting in more thorough separation. When the drive shaft 16 rotates, it drives the outer shaft 1001 and the cleaning disc 1002 mounted on the drive shaft 16 to rotate, synchronously driving the sleeve 1003 to rotate. The sleeve 1003 drives the surface of the... An L-shaped bend 1004 is placed, which drives the brush plate 1008 to rotate on the inclined plate 901. The brush plate 1008 is in contact with the top surface of the inclined plate 901, and the size of the brush plate 1008 is adapted to the lateral radius of the inclined plate 901. After the brush plate 1008 rotates on the inclined plate 901, it cleans the surface of the inclined plate 901. The elastic hinge support and reset structure 1006 ensures that the brush plate 1008 is always elastically in contact with the inclined plate 901, which achieves both support and positioning and automatic reset.

[0034] The settled coal powder falls into the sludge thickening zone 104, driving the main shaft 16 to rotate and squeeze the thickening propeller 11, increasing the sludge concentration; after thickening, the coal powder is discharged through the coal powder discharge pipe 4.

[0035] The generated clear liquid rises into the clear water zone 101 and is discharged through the clear water outlet pipe 3.

[0036] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An energy-saving coal-containing wastewater treatment device, characterized in that, It includes a treatment tank (1), which is divided into a clear water zone (101), a sedimentation separation zone (102), a swirl flocculation zone (103), and a sludge thickening zone (104) from top to bottom. The side wall of the treatment tank (1) is provided with a swirl inlet pipe (2) that is tangentially connected to the swirl flocculation zone (103). The top of the treatment tank (1) is provided with a clean water outlet pipe (3). The bottom of the treatment tank (1) is provided with a coal powder sludge discharge pipe (4). The top of the side of the treatment tank (1) away from the swirl inlet pipe (2) is provided with a reagent inlet pipe (5). The reagent inlet pipe (5) is connected to the reagent dosing device (6). The swirl flocculation zone (103) is equipped with a swirl guide assembly (7) and a micro-flocculation disturbance assembly (8); the sedimentation separation zone (102) is equipped with a variable pitch inclined plate assembly (9) and a rotating self-cleaning assembly (10); the sludge thickening zone (104) is equipped with a thickening propeller (11); the front end of the swirl inlet pipe (2) is equipped with a residual energy recovery turbine (12), which is connected to a micro generator (13); and the rear end of the swirl inlet pipe (2) is equipped with a wastewater inlet pipe (14). A rotary motor (15) is provided at the top center of the processing tank (1). The output end of the rotary motor (15) is provided with a drive shaft (16). The drive shaft (16) passes through the inside of the processing tank (1) and is mechanically linked with the micro-flocculation disturbance component (8) and the rotary self-cleaning component (10). The concentration propeller (11) is sleeved on the bottom of the drive shaft (16).

2. The energy-saving coal-containing wastewater treatment equipment according to claim 1, characterized in that, The vortex inlet pipe (2) is provided with a waterproof and breathable membrane on the side away from the residual energy recovery turbine (12).

3. The energy-saving coal-containing wastewater treatment equipment according to claim 1, characterized in that, The swirling flow guiding assembly (7) includes a swirling flow guiding channel (701), which is fixed in the lower part of the swirling flocculation zone (103). A sandwich layer (702) is provided inside the swirling flow guiding channel (701). A micro-driver is provided on the upper side of the sandwich layer (702). A gear (703) is connected to the output end of the micro-driver. A rotating ring (704) is provided below the gear (703). The rotating ring (704) is sleeved on the inner wall of the sandwich layer (702). A tooth (705) that meshes with the gear (703) is provided on the top side of the rotating ring (704). A number of limiting rods (706) are evenly inserted on the rotating ring (704). The limiting rods (706) pass through the rotating ring (704) and the interlayer (702), and the inner end is provided with an outer connecting rod (707). The inner side of the outer connecting rod (707) is provided with a slot, and the slot is provided with a swirl guide plate (708). The inner center of the swirl guide plate (708) is provided with an inner connecting rod (709). The side of the inner connecting rod (709) away from the swirl guide plate (708) is movably connected to the side of the inner disk (710). The inner disk (710) is sleeved on the drive spindle (16). A second limiting rod (712) is provided on the lower side of the inner wall of the interlayer (702) corresponding to the first limiting rod (706). A spiral guide ring (713) is provided on the second limiting rod (712), and the first limiting rod (706) passes through the spiral guide ring (713).

4. The energy-saving coal-containing wastewater treatment equipment according to claim 3, characterized in that, The outer connecting rod (707) is provided with a sealing ring at the contact end with the interlayer (702).

5. The energy-saving coal-containing wastewater treatment equipment according to claim 3, characterized in that, The micro-flocculation disturbance component (8) includes an annular track (801) fixed on the top side of the swirling guide channel (701). The annular track (801) is provided with several slidingly fitted sliders (802). The top of the sliders (802) is provided with a drive arm (803). The top of the drive arm (803) away from the slider (802) is movably connected to the bottom outer end of the polygonal rotating plate (804). The polygonal rotating plate (804) is sleeved on the drive spindle (16). The top outer end of the polygonal rotating plate (804) is provided with a support rod (805). The top of the support rod (805) is provided with a disturbance blade (806).

6. The energy-saving coal-containing wastewater treatment equipment according to claim 5, characterized in that, The disturbance blade (806) has a flexible arc-shaped structure.

7. The energy-saving coal-containing wastewater treatment equipment according to claim 1, characterized in that, The variable pitch inclined plate assembly (9) includes multiple inclined plates (901), the spacing between adjacent inclined plates (901) gradually decreases from top to bottom, and the surface of the inclined plate (901) is provided with a superhydrophobic coating.

8. The energy-saving coal-containing wastewater treatment equipment according to claim 7, characterized in that, The rotating self-cleaning assembly includes the same number of outer shafts (1001) as the inclined plate (901). The outer shafts (1001) are sleeved on the drive spindle (16) and located above the inclined plate (901). The bottom of the outer shafts (1001) is provided with a cleaning disc (1002). A sleeve (1003) is sleeved on the outer shafts (1001). Several L-shaped bends (1004) are provided on the outside of the sleeve (1003). The end of the L-shaped bend (1004) away from the sleeve is provided with a mounting seat one (1005). The bottom of the mounting seat one (1005) is provided with an elastic hinge support reset structure (1006). The bottom of the elastic hinge support reset structure (1006) is provided with a mounting seat two (1007). The bottom of the mounting seat two (1007) is provided with a brush plate (1008).

9. The energy-saving coal-containing wastewater treatment equipment according to claim 8, characterized in that, The elastic hinged support reset structure (1006) consists of a hinge support and a torsion spring.

10. The energy-saving coal-containing wastewater treatment equipment according to claim 1, characterized in that, The vortex inlet pipe (2) is provided with a central shaft (201) connected to the shaft of the waste energy recovery turbine (12). The central shaft (201) is provided with a lower retaining ring (202), a spring (203), a gasket (204), a wind turbine (205) and an upper retaining ring (206) in sequence from the waste energy recovery turbine (12) to the treatment tank (1). The upper retaining ring (206) is provided with a number of filter holes (207).

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