Discharge sewage treatment and discharge equipment and process based on safe coal mining

Abstract

The present application relates to the technical field of sewage treatment, and discloses a discharge sewage treatment and re-discharge equipment and process based on safe coal mining, wherein the discharge sewage treatment and re-discharge equipment based on safe coal mining comprises a sedimentation tank and a ladder frame fixedly connected to the top end of the sedimentation tank, further comprises a double-end frame fixedly connected to the middle part of the ladder frame, a sleeve shell fixedly connected to the outside of the rotating shaft, and a pressing sleeve with the bottom end located in the inside of the sleeve shell and abutting against the top end of the connecting piece; the pressing sleeve is used to switch the inclined scrapers through the connecting piece, and the inclined scraper surface is cleaned by the cleaning frame. The switching of the inclined scrapers is realized by the cooperation of the pressing sleeve and the connecting piece, and the cleaning of the inclined scrapers is realized by the cleaning frame. After the switching of the inclined scrapers, the cleaning frame can maintain the uniform force and stable state of each component during the operation of the equipment, reduce the occurrence of abnormal conditions of the equipment, improve the reliability of the operation of the equipment, and ensure the long-term stable operation of the sewage treatment system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, and in particular to a discharged sewage treatment and re-discharge equipment and process based on safe coal mining. BACKGROUND

[0002] In the process of coal mining, washing and processing, and coal chemical production, a large amount of coal sewage containing suspended solids, heavy metals, organic pollutants and other harmful substances will be generated. In order to achieve sewage discharge and water resource recycling, a multi-stage process combination such as "pretreatment, sedimentation, filtration purification and advanced treatment" is usually used to treat the sewage. The sedimentation step is a key step, which needs to use a mud scraper to scrape the coal slurry at the bottom of the sedimentation tank to the center mud port for discharge, so as to realize solid-liquid separation.

[0003] However, in the prior art, the common mud scraper for coal sewage sedimentation tank in the market usually adopts a center transmission or a peripheral transmission mud scraping structure. The scraper plate is connected to the driving device through a rotating shaft and rotates around the center shaft of the sedimentation tank under the driving of the motor to scrape the settled coal slurry to the center mud port. However, due to the characteristics of the coal slurry in the coal sewage, such as small particle size, high viscosity and strong adsorption, when the scraper plate rotates, part of the coal slurry will adhere to the surface and edge of the scraper plate. With the continuous operation of the equipment, the coal slurry continuously accumulates, resulting in an increase in the self-weight of the scraper plate, an overload of the driving motor, a decrease in the rotation speed of the scraper plate, and a decrease in the amount of scraped mud per unit time, which seriously affects the continuity of the sewage treatment system. In addition, the existing scraper plate usually adopts a gap type structure to reduce the operating resistance. However, the coal slurry is easy to fill the gap between the scraper plates and form a dense clogging layer. The contact area between the clogged scraper plate and the water flow is greatly increased during rotation, resulting in a strong turbulent flow in the sedimentation tank. The upward flow formed by the turbulent flow will re-suspend the settled coal slurry in the water body, increasing the suspended solids concentration of the sedimentation tank effluent and destroying the stability of the entire sewage treatment process. In addition, the increased load of the scraper plate caused by the adhesion and clogging of the coal slurry will accelerate the wear of the key components such as bearings and shorten the service life of the equipment. Moreover, in order to remove the accumulated slurry on the scraper plate, frequent shutdown for manual cleaning or high-pressure washing is required, which not only increases the operation and maintenance workload, but also prolongs the non-production time of the sewage treatment system, indirectly increasing the sewage treatment cost of the enterprise. SUMMARY

[0004] The present application aims to provide a discharged sewage treatment and re-discharge equipment and process based on safe coal mining, which solves the problem of continuous high-efficiency operation of the sedimentation tank mud scraper.

[0005] The application provides a sewage treatment and discharge equipment based on coal safe mining.

[0006] Further, the connecting rods are divided into first connecting rods and second connecting rods, the inclined scrapers connected by the first connecting rods and the second connecting rods are staggered, the number of the cleaning frames is twice that of the inclined scrapers, the inclined scrapers are located between two cleaning frames, and the bottom end of the cleaning frame is parallel to the inclined scrapers.

[0007] Further, the connecting piece comprises a sliding strip slidingly connected to the sleeve shell, an arc piece fixedly connected to the sliding strip, a strong spring connected between the rotating shaft and the arc piece, a half sliding block fixedly connected to the bottom end of the sliding strip, and a connecting shaft fixedly connected to the half sliding block, and the top end of the sliding strip is arc-shaped.

[0008] Further, the sleeve sleeve comprises a sleeve shaft connected to the output end of the double-end frame, and an inclined block fixedly connected to the bottom end of the sleeve shaft, the bottom of the inclined block is an arc slope, the top end of the sliding strip is attached to the inclined block, and the inclined block is located in the sleeve shell.

[0009] Further, the outside of the sleeve shell is provided with two mounting rods, the two mounting rods are symmetrical about the central axis of the sleeve shell, the top of each of the plurality of cleaning frames is fixedly connected to the mounting rod, and two sliding grooves are formed in the sleeve shell.

[0010] Further, the length from the bottom end to the top end of the arc slope is equal to the length of the sliding groove.

[0011] Further, the outside of the rotating shaft is fixedly connected with a side piece, the bottom end of the strong spring is connected with the side piece, and the connecting shaft penetrates through the sliding groove and is fixedly connected with the double bracket.

[0012] Further, the double-end frame comprises a main motor fixedly connected to the ladder frame, and a secondary motor fixedly connected to the main motor, the output end of the main motor is connected with the rotating shaft, and the output end of the secondary motor is connected with the sleeve shaft.

[0013] Further, the double joint frame is provided with a straight rod, and a reinforcing cable is connected between the straight rod and the end of the connecting rod away from the double joint frame.

[0014] Another aspect of the present application provides: a sewage treatment and discharge process based on safe coal mining, using a sewage treatment and discharge device based on safe coal mining, characterized in that it comprises the following steps:

[0015] Inlet water: sewage enters the inside of the sedimentation tank, preparing for solid-liquid separation.

[0016] Sedimentation separation: the sewage flows slowly, and the suspended solids settle to the bottom of the tank due to gravity, and the clear water rises, and the upper layer of water is discharged through overflow and enters the subsequent treatment process.

[0017] Sludge collection: the sludge at the bottom of the tank is treated by the inclined scraper driven by the double-end frame.

[0018] Cleaning shovel: regularly discharging treatment, and changing different inclined scrapers to ensure efficient cleaning through the double-end frame drive sleeve.

[0019] The beneficial effects of the present application are:

[0020] The switching of the inclined scraper is realized by the cooperation of the sleeve and the connecting piece, and the cleaning of the inclined scraper is realized by the cleaning frame, which can automatically clean the inclined scraper with coal slime adhered after the switching of the inclined scraper, without manual intervention, and the cleaning work can be completed by the operation of the equipment itself, ensuring that the mud scraper always operates in an efficient state, improving the sewage treatment efficiency, ensuring the solid-liquid separation effect, and maintaining the uniform stress and stable state of each component during the operation of the equipment, reducing the occurrence of abnormal conditions of the equipment, improving the reliability of the operation of the equipment, and ensuring the long-term stable operation of the sewage treatment system.

[0021] The automatic cleaning of the inclined scraper switching is realized by the fixed inclined scraper and the cleaning frame, which reduces the severe turbulence of the water flow in the sedimentation tank, effectively prevents the re-suspension of the settled coal slime, ensures the stability of the water quality of the sedimentation tank, and maintains the stability of the entire sewage treatment process.

[0022] By making different inclined scrapers work alternately, the single inclined scraper is prevented from working continuously, the working time of a single inclined scraper is greatly shortened each time, the friction time and contact frequency with coal slime are significantly reduced, and the friction is reduced to protect the mud scraping performance of the inclined scraper. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a perspective structural schematic view of the sewage treatment and discharge device of the present application from the first perspective;

[0024] Figure 2 is a structural schematic view of the double-end frame of the sewage treatment and discharge device of the present application;

[0025] Figure 3 Structure diagram of the rotating shaft of the sewage treatment and re-discharge device of the present application;

[0026] Figure 4 Structure diagram of the connecting piece of the sewage treatment and re-discharge device of the present application;

[0027] Figure 5 Structure diagram of the connecting rod of the sewage treatment and re-discharge device of the present application;

[0028] Figure 6 Structure diagram of the pressing sleeve of the sewage treatment and re-discharge device of the present application;

[0029] Figure 7 Structure diagram of the sleeve of the sewage treatment and re-discharge device of the present application;

[0030] Figure 8 Structure diagram of the sewage treatment and re-discharge device of the present application Figure 2 Enlarged diagram of A in the sewage treatment and re-discharge device of the present application.

[0031] In the diagram:

[0032] 1, sedimentation tank; 2, ladder stand; 3, double end stand; 31, main motor; 32, secondary motor; 4, rotating shaft; 41, side piece; 5, pressing sleeve; 51, sleeve shaft; 52, inclined block; 521, arc inclined surface; 6, sleeve; 61, mounting rod; 62, sliding groove; 7, connecting piece; 71, sliding bar; 72, arc piece; 73, strong spring; 74, half sliding block; 75, connecting shaft; 8, double connecting stand; 81, straight rod; 9, connecting rod; 91, front connecting rod; 92, rear connecting rod; 10, inclined scraper; 11, cleaning stand; 12, threaded rod; 13, reinforcing cable. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] Example one, refer to Figures 1-8For the first embodiment of the present application, a sewage treatment and discharge equipment based on safe coal mining is provided, which comprises a sedimentation tank 1, a ladder stand 2 fixedly connected to the top end of the sedimentation tank 1, a double-end stand 3 fixedly connected to the middle part of the ladder stand 2, a rotating shaft 4 and a pressing sleeve 5 fixedly connected to the output end of the double-end stand 3, a sleeve shell 6 fixedly connected to the outside of the rotating shaft 4, a connecting piece 7 in sliding connection with the sleeve shell 6, a double connecting stand 8 fixedly connected to the connecting piece 7, two connecting rods 9 fixedly connected to the two sides of the double connecting stand 8, a plurality of oblique scrapers 10 equidistantly arranged and fixedly connected to the connecting rods 9, a plurality of cleaning stands 11 equidistantly arranged and fixedly connected to the sleeve shell 6, and a threaded rod 12 connected between the rotating shaft 4 and the pressing sleeve 5. The rotating shaft 4 is located outside the pressing sleeve 5, the bottom end of the pressing sleeve 5 is located inside the sleeve shell 6 and is in close contact with the top end of the connecting piece 7. The connecting piece 7 and the double connecting stand 8 are both provided with two parts which are symmetrical about the central axis of the rotating shaft 4. The pressing sleeve 5 switches the oblique scrapers 10 through the connecting piece 7, and the cleaning stands 11 clean the surfaces of the oblique scrapers 10, thereby avoiding the increase of the weight of the oblique scrapers 10 due to the adhesion of coal sludge and maintaining the continuous and efficient operation of the sewage treatment system.

[0035] Specifically, the basic framework of the equipment is composed of the sedimentation tank 1 and the ladder stand 2. The ladder stand 2 is fixedly connected to the top end of the sedimentation tank 1 in a stable manner by steel welding and bolt combination, thereby providing a reliable support platform for the subsequent components of the equipment. The output end of the double-end stand 3 has two parts, which are respectively fixedly connected to the rotating shaft 4 and the pressing sleeve 5. The pressing sleeve 5 has a hollow cylindrical structure, and its bottom end is in close contact with the top end of the connecting piece 7, so as to realize precise transmission and switching operation. The sleeve shell 6 is a cylindrical metal shell. Since the connecting piece 7 and the double connecting stand 8 are both provided with two parts, the corresponding connecting rods 9 are provided with four parts. The number of oblique scrapers 10 connected to each connecting rod 9 is equal. The surfaces of the oblique scrapers 10 are subjected to wear-resistant treatment. In addition, a plurality of groups of cleaning stands 11 are equidistantly fixedly connected to the outer wall of the sleeve shell 6. The bottom end of the cleaning stand 11 is not in contact with the oblique scraper 10, but the gap between them is small, so that the oblique scraper 10 can be moved, thereby efficiently removing the coal sludge adhered to the surface and edge of the oblique scraper 10 without damaging the surface of the oblique scraper 10. During work, the rotation of the pressing sleeve 5 pushes the corresponding connecting piece 7 by applying downward pressure, thereby realizing the up-and-down movement of the oblique scrapers 10 at different positions of the rotating shaft 4 and switching them. The cleaning stands 11 clean the oblique scrapers 10 with coal sludge switched down in time, thereby forming an efficient and continuous mud scraping operation process.

[0036] With reference to Figures 1-3 The connecting rods 9 are divided into first connecting rods 91 and second connecting rods 92. The oblique scrapers 10 connected by the first connecting rods 91 and the second connecting rods 92 are arranged alternately. The number of cleaning stands 11 is twice the number of oblique scrapers 10. The oblique scrapers 10 are located between two cleaning stands 11. The bottom end of the cleaning stand 11 is parallel to the oblique scraper 10.

[0037] Specifically, the connecting rod 9 is further subdivided into a front connecting rod 91 and a rear connecting rod 92, both of which are identical in structure and are made of high-strength alloy steel pipe material. In terms of spatial layout, the front connecting rod 91 and the rear connecting rod 92 are distributed in a stepped manner due to the control of the pressure sleeve 5 and the connecting piece 7. Meanwhile, the inclined scrapers 10 connected by them form a staggered array. At the same time, the length of the inclined scrapers 10 is less than the spacing of the front connecting rod 91 and the rear connecting rod 92, avoiding collision during switching,

[0038] In addition, a high-elasticity EPDM rubber plate can also be sleeved on the surface of the bottom end of each cleaning rack 11. A sawtooth texture is arranged on the surface of the rubber plate. The rubber scraper utilizes its elastic deformation to tightly adhere to the surface and back of the inclined scraper 10, completely stripping the adhered coal slime, which can further increase the effect and thus ensure the continuous and stable operation of the sewage treatment system.

[0039] Referring to Figures 1-4 The connecting piece 7 includes a sliding bar 71 slidingly connected inside the sleeve 6, an arc piece 72 fixedly connected with the sliding bar 71, a strong spring 73 connected between the rotating shaft 4 and the arc piece 72, a half sliding block 74 fixedly connected at the bottom end of the sliding bar 71, and a connecting shaft 75 fixedly connected with the half sliding block 74. The top end of the sliding bar 71 is arc-shaped.

[0040] Specifically, the sliding bar 71 is in a long strip shape. The surfaces of the sliding bar 71 and the half sliding block 74 are processed by grinding to enable smooth and stable sliding inside the sleeve 6. The sliding bar 71 is fixedly connected with the arc piece 72 through high-strength welding. The arc piece 72 is wrapped around the outside of the rotating shaft 4. The strong spring 73 is arranged between the inside of the arc piece 72 and the rotating shaft 4. Meanwhile, the strong spring 73 and the arc piece 72 are both provided with two and are symmetrical about the central axis of the sliding bar 71. The two strong springs 73 are used to ensure the rebound speed of the sliding bar 71, the stability of the sliding of the sliding bar 71, and sufficient rebound force to drive multiple components. Therefore, a strong spring 73 with a high elastic coefficient needs to be installed.

[0041] In addition, the two connecting pieces 7 correspond to the front connecting rod 91 and the rear connecting rod 92, respectively. When the front connecting rod 91 is located below the rear connecting rod 92, the two connecting pieces 7 also form an upper and lower step. The strong spring 73 of the connecting piece 7 located at the lower position is in a compressed state. That is, when the pressure sleeve 5 rotates, it will exert pressure downward on one connecting piece 7, while reducing the pressure on the other connecting piece 7. The sliding bar 71 and the half sliding block 74 of the connecting piece 7 that is extruded will synchronously slide back, thereby causing the double support frame 8 and the installed connecting rod 9 to move synchronously. Meanwhile, the strong spring 73 will also be compressed. The strong spring 73 of the connecting piece 7 with reduced pressure will quickly rebound, causing the overall connecting piece 7 to reset. The corresponding components connected thereto will also move upward, thereby switching.

[0042] Referring to Figures 2-6The pressing sleeve 5 comprises a sleeve shaft 51 connected with the output end of the double-end frame 3, and an inclined block 52 fixedly connected at the bottom end of the sleeve shaft 51, the bottom of the inclined block 52 is an arc inclined surface 521, the inclined block 52 is in abutment with the top end of the slide bar 71, and the inclined block 52 is located inside the sleeve shell 6.

[0043] Specifically, at the bottom end of the sleeve shaft 51, the inclined block 52 is fixedly connected, the bottom of the inclined block 52 is an arc inclined surface 521, which can be in abutment with the arc structure of the top end of the slide bar 71, and during the running and rotating of the inclined block 52, a stable force transmission path is ensured, when the double-end frame 3 drives the sleeve shaft 51 to rotate by 180 degrees, the arc inclined surface 521 at the bottom end of the inclined block 52 switches position, and exerts pressure on the top end of one slide bar 71, so as to promote the slide bar 71 to slide smoothly along the inner wall of the sleeve shell 6, while the other slide bar 71 loses pressure and moves back, thereby driving the double connecting frame 8, the connecting rod 9 and the inclined scraper 10 connected therewith to move synchronously, so as to realize the switching action of different inclined scrapers 10, at the same time, the inclined block 52 is located inside the sleeve shell 6, which can ensure the free movement of the inclined block 52, and effectively prevent impurities such as coal slime from entering and affecting the working performance.

[0044] Referring to Figures 2-7 The outer portion of the sleeve shell 6 is provided with two mounting rods 61, the two mounting rods 61 are symmetrical about the central axis of the sleeve shell 6, the top portions of the plurality of cleaning frames 11 are fixedly connected with the mounting rods 61, two slide grooves 62 are formed on the sleeve shell 6, and the length from the bottom end to the top end of the arc inclined surface 521 is equal to the length of the slide grooves 62.

[0045] The outer portion of the rotating shaft 4 is fixedly connected with a side plate 41, the bottom end of the strong spring 73 is connected with the side plate 41, and the connecting shaft 75 penetrates the slide grooves 62 and is fixedly connected with the double connecting frame 8.

[0046] Specifically, the two slide grooves 62 limit the moving path of the connecting shaft 75, so that the connecting shaft 75 can only move up and down, and when the different inclined scrapers 10 are switched, the moving distance of the two is also equal to the length of the slide grooves 62, the slide grooves 62 are milled, the inner wall thereof is ground to reduce the friction, the slide bar 71 can slide in the slide grooves 62 to complete the entire stroke, one end of the connecting shaft 75 is connected with the half slide block 74, and the other end extends to the outside of the sleeve shell 6 and is fixedly connected with the double connecting frame 8 by high-strength bolts, during the operation of the equipment, the connecting shaft 75 can accurately transmit the sliding displacement of the slide bar 71 to the double connecting frame 8, thereby driving the inclined scraper 10 to realize stable switching, ensuring the efficient operation of the entire mud scraping system, ensuring the accuracy and reliability of the cooperation between the components of the equipment, and ensuring the efficient and stable operation of the mud scraping operation.

[0047] In addition, the side plate 41 ensures that it can provide a stable and accurate support point for the strong spring 73 during the rotation of the rotating shaft 4, and the side plate 41 is provided with a square opening, which can ensure the movement of the slide bar 71.

[0048] Referring to Figures 1-8 , the double-end frame 3 comprises a main motor 31 fixedly connected with the ladder frame 2, and a secondary motor 32 fixedly connected with the main motor 31, an output end of the main motor 31 being connected with the rotating shaft 4, and an output end of the secondary motor 32 being connected with the sleeve shaft 51.

[0049] When the rotating shaft 4 rotates, the sleeve 5, the sleeve shell 6, the connecting piece 7, the double-end frame 8, the connecting rod 9, the inclined scraper 10, and the cleaning frame 11 all rotate synchronously, when it is needed to switch the inclined scraper 10, the main motor 31 is stopped, the threaded rod 12 between the rotating shaft 4 and the sleeve 5 is removed, then the sleeve 5 is driven to rotate one hundred and eighty degrees by the secondary motor 32, the secondary motor 32 is driven by two bevel gears, and the secondary motor 32 needs to be an idle motor.

[0050] Referring to Figures 1-8 , the double-end frame 8 is provided with a straight rod 81, a reinforcing cable 13 being connected between the straight rod 81 and the end of the connecting rod 9 away from the double-end frame 8, so that the stability of the whole device during operation is increased.

[0051] The working principle of the present application is as follows: first, the operator judges that the inclined scraper 10 needs to be switched, and then the main motor 31 is stopped, then the operator removes the threaded rod 12 between the rotating shaft 4 and the pressure sleeve 5, removes the restriction on the axial movement of the pressure sleeve 5, then the secondary motor 32 starts to work, the secondary motor 32 drives the sleeve shaft 51 to rotate, and then drives the inclined block 52 fixed at the bottom end of the sleeve shaft 51 to rotate, because the bottom of the inclined block 52 is an arc inclined surface 521, and is in contact with the top end of the sliding bar 71, during the rotation of the inclined block 52 by 180 degrees, the bottom end of the arc inclined surface 521 switches position, the originally unpressurized side sliding bar 71 begins to be pressed by the arc inclined surface 521 of the inclined block 52, under the action of extrusion, the sliding bar 71 slides smoothly along the sliding groove 62 on the inner wall of the sleeve shell 6, because the sliding groove 62 limits the movement path of the connecting shaft 75, ensuring that the connecting shaft 75 can only move up and down, the sliding of the sliding bar 71 is accurately transmitted to the double connecting frame 8 through the connecting shaft 75, and then drives the connecting rod 9 and the inclined scraper 10 connected thereto to move downward synchronously, at the same time, the strong spring 73 in the connecting piece 7 is compressed and accumulates elastic potential energy, and the other side sliding bar 71 which is originally under pressure loses pressure as the inclined block 52 rotates, at this time, the strong spring 73 in the compressed state rebounds rapidly, and the rebound force pulls the corresponding connecting piece 7 to move upward as a whole, and the double connecting frame 8, the connecting rod 9 and the inclined scraper 10 connected thereto also move upward synchronously to reset, through the downward and upward movement of the two connecting pieces 7, the up and down switching of the inclined scraper 10 at different positions is realized, the originally working inclined scraper 10 is switched to the non-working position, and the other side clean inclined scraper 10 enters the working state, after the switching is completed, the operator re-installs the threaded rod 12 between the rotating shaft 4 and the pressure sleeve 5 to fix the position of the pressure sleeve 5. Then, the main motor 31 is restarted to drive the rotating shaft 4 to rotate, driving the pressure sleeve 5, the sleeve shell 6, the connecting piece 7, the double connecting frame 8, the connecting rod 9, the inclined scraper 10 and the cleaning frame 11 to rotate synchronously, the newly switched inclined scraper 10 in the working position starts to work, thereby forming an efficient and continuous mud scraping operation process.

[0052] Embodiment two, refer to Figures 1-8 The present application provides a kind of based on coal safe exploitation's effluent sewage treatment and re-discharge process, using a kind of based on coal safe exploitation's effluent sewage treatment and re-discharge equipment, including the following steps:

[0053] Water inlet: sewage enters the inside of sedimentation tank 1, prepares for solid-liquid separation.

[0054] Sedimentation separation: sewage flows slowly, suspended solids settle to the bottom of the pool due to gravity, clear water rises, and the upper layer of water is discharged through overflow into the subsequent treatment process.

[0055] Sludge collection: the bottom sludge of the pool is treated by inclined scraper 10 through double-end frame 3 driving rotating shaft 4.

[0056] Cleaning bucket: regular discharge treatment, while driving the sleeve 5 by double-end frame 3 to replace different inclined blades 10 to ensure efficient cleaning.

[0057] It should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A sewage treatment and discharge equipment based on safe coal mining, comprising a sedimentation tank (1) and a ladder stand (2) fixedly connected to the top of the sedimentation tank (1), characterized in that: Also include fixedly connected in the middle of the ladder frame (2) double end frame (3), fixedly connected to the output end of the double end frame (3) rotating shaft (4) and the sleeve (5), fixedly connected to the outside of the rotating shaft (4) shell (6), with shell (6) sliding connection connecting piece (7), with connecting piece (7) fixedly connected to the double connecting frame (8), provided with two and respectively fixedly connected to both sides of the double connecting frame (8) connecting rod (9), equidistantly arranged multiple and fixedly connected with the connecting rod (9) inclined scraper (10), equidistantly arranged multiple and fixedly connected with the shell (6) cleaning frame (11), and connecting between the rotating shaft (4) and the sleeve (5) threaded rod (12), the rotating shaft (4) is located outside the sleeve (5), the bottom end of the sleeve (5) is located inside the shell (6) and is attached to the top end of the connecting piece (7), the connecting piece (7) and the double connecting frame (8) are both provided with two and are symmetrical about the central axis of the rotating shaft (4), the sleeve (5) is switched by the connecting piece (7) so that the inclined scraper (10) is switched, and the surface of the inclined scraper (10) is cleaned by the cleaning frame (11).

2. The coal safe mining based effluent wastewater treatment and re-discharge apparatus as claimed in claim 1, wherein: The connecting rod (9) is divided into first connecting rod (91) and rear connecting rod (92), the first connecting rod (91) and the rear connecting rod (92) are connected with the inclined scraper (10) arranged alternately, the number of the cleaning frame (11) is twice that of the inclined scraper (10), the inclined scraper (10) is located between two cleaning frames (11), and the bottom end of the cleaning frame (11) is parallel to the inclined scraper (10).

3. The coal safe mining based effluent wastewater treatment and re-discharge apparatus as claimed in claim 2, wherein: The connecting piece (7) includes a sliding bar (71) slidingly connected inside the shell (6), an arc piece (72) fixedly connected with the sliding bar (71), a strong spring (73) connected between the rotating shaft (4) and the arc piece (72), a half sliding block (74) fixedly connected to the bottom end of the sliding bar (71), and a connecting shaft (75) fixedly connected with the half sliding block (74), and the top end of the sliding bar (71) is arc-shaped.

4. The coal safe mining based effluent wastewater treatment and re-discharge apparatus as claimed in claim 3, wherein: The sleeve (5) includes a sleeve shaft (51) connected with the output end of the double end frame (3), and an inclined block (52) fixedly connected to the bottom end of the sleeve shaft (51), the bottom of the inclined block (52) is an arc inclined surface (521), the top end of the sliding bar (71) is attached to the inclined block (52), and the inclined block (52) is located inside the shell (6).

5. The coal safe mining based effluent wastewater treatment and re-discharge apparatus as claimed in claim 4, wherein: The outside of the shell (6) is provided with two mounting rods (61), the two mounting rods (61) are symmetrical about the central axis of the shell (6), the top of each of the plurality of cleaning frames (11) is fixedly connected with the mounting rod (61), and two sliding grooves (62) are formed in the shell (6).

6. The coal safe mining based effluent wastewater treatment and re-discharge apparatus as claimed in claim 5, wherein: The length from the bottom end to the top end of the arc inclined surface (521) is equal to the length of the sliding groove (62).

7. The coal safe mining based effluent wastewater treatment and re-discharge apparatus as claimed in claim 5 wherein: The outside of the rotating shaft (4) is fixedly connected with a side piece (41), the bottom end of the strong spring (73) is connected with the side piece (41), and the connecting shaft (75) penetrates the sliding groove (62) and is fixedly connected with the double connecting frame (8).

8. The coal safe mining based effluent wastewater treatment and re-discharge apparatus as claimed in claim 4 wherein: The double-end frame (3) comprises a main motor (31) fixedly connected with the ladder frame (2), and a secondary motor (32) fixedly connected with the main motor (31), wherein an output end of the main motor (31) is connected with the rotating shaft (4), and an output end of the secondary motor (32) is connected with the sleeve shaft (51).

9. The coal safe mining based effluent wastewater treatment and re-discharge apparatus as claimed in claim 1 wherein: The double-connection frame (8) is provided with a straight rod (81), and a reinforcing cable (13) is connected between the straight rod (81) and one end of the connecting rod (9) away from the double-connection frame (8).

10. A process for treating and re-discharging effluent water based on safe mining of coal, using the apparatus for treating and re-discharging effluent water based on safe mining of coal according to any one of claims 1-9, characterized in that, The method comprises the following steps: Water inlet: sewage enters the inside of the sedimentation tank (1) to prepare for solid-liquid separation; Sedimentation separation: the sewage flows slowly, and the suspended solids settle to the bottom of the tank due to gravity, and the clear water rises, and the upper layer of water is discharged through overflow and enters the subsequent treatment process; Sludge discharge and collection: the sludge at the bottom of the tank is treated through the inclined scraper (10) driven by the rotating shaft (4) driven by the double-end frame (3); Cleaning shovel: regularly discharging and treating, and changing different inclined scrapers (10) through the sleeve (5) driven by the double-end frame (3) to ensure efficient cleaning.

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