A wastewater pretreatment device for thermal power plant

Abstract

The present invention discloses a wastewater pretreatment device for a thermal power plant, which relates to the technical field of wastewater treatment, and includes a sewage unit, including a sewage pipe, a fixed sleeve arranged inside the sewage pipe, a movable sleeve arranged outside the fixed sleeve, a piston rod arranged at the end of the movable sleeve, an elastic member arranged at the bottom of the piston rod and in conflict with it, an adjustment member passing through the bottom of the sewage pipe, and a contact member arranged on the side wall of the sewage pipe. The beneficial effects of the present invention are that the filtering efficiency can be significantly improved, and by reducing the accumulation of impurities inside the filter, the wastewater treatment is ensured to be faster and the processing time is reduced; at the same time, the maintenance and cleaning operation of the filter screen becomes simpler, saving manpower and time costs; in addition, the reduction of impurity accumulation will also reduce the wear of the filter screen and related components, thereby extending the service life of the equipment, and further reducing the maintenance and replacement costs.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a wastewater pretreatment device for a thermal power plant. Background Art

[0002] Wastewater from thermal power plants mainly comes from cooling water, boiler wastewater, limestone pulping wastewater and by-products of wastewater treatment. Cooling water may be contaminated and discharged during recycling, and boilers regularly discharge wastewater containing high concentrations of dissolved solids and heavy metals during steam power generation. Limestone pulping is used for flue gas desulfurization, and the wastewater produced contains suspended solids and chemical oxygen demand (COD). In addition, sludge and by-products generated during wastewater treatment also lead to wastewater discharge.

[0003] Before wastewater is discharged, it must be treated to ensure that it meets the discharge standards. However, during the treatment process, a large amount of impurities in the wastewater often accumulate in the filter device, causing the filter to become clogged, which not only reduces the filtration efficiency but also makes it more difficult to clean the inside of the filter. Summary of the invention

[0004] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a wastewater pretreatment device for a thermal power plant, which is designed to solve the problem of inconvenience in cleaning impurities inside the existing wastewater treatment devices.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A wastewater pretreatment device for a thermal power plant, comprising: a sewage unit, comprising a sewage pipe, a fixed sleeve arranged inside the sewage pipe, a movable sleeve arranged outside the fixed sleeve, a piston rod arranged at the end of the movable sleeve, an elastic member arranged at the bottom of the piston rod and in conflict with the piston rod, an adjusting member penetrating the bottom of the sewage pipe, and a contact pressure member arranged on the side wall of the sewage pipe;

[0007] The fixed sleeve includes a first through hole opened on its side wall, and the movable sleeve includes a second through hole opened on its side wall;

[0008] The piston rod is compressed to drive the movable sleeve to rotate, thereby achieving the overlap of the first through hole and the second through hole;

[0009] The filter unit comprises a tank body, a filter screen arranged inside the tank body, and a scraper arranged at a central position inside the tank body;

[0010] The tank body includes a water inlet arranged on the top, a water filter outlet arranged on the bottom of the tank body, and a sewage outlet arranged on the bottom of the tank body;

[0011] The filter screen is arranged between the water inlet and the water filter outlet.

[0012] As a preferred solution of the wastewater pretreatment device for a thermal power plant of the present invention, wherein: the sewage discharge pipe includes a debris removal port penetrating through its side wall;

[0013] The first through hole coincides with the axis of the impurity removal port,

[0014] The movable pipe sleeve is arranged inside the sewage pipe.

[0015] As a preferred solution of the wastewater pretreatment device for a thermal power plant of the present invention, wherein: the movable sleeve is movably connected to the fixed sleeve;

[0016] The outer wall of the movable pipe sleeve is provided with an extension plate, and the extension plate is embedded in the inner wall of the sewage pipe and can rotate.

[0017] As a preferred solution of the wastewater pretreatment device for a thermal power plant of the present invention, the movable pipe sleeve comprises a connecting sleeve rod arranged at its end, and an arc groove is provided on the inner wall of the connecting sleeve rod;

[0018] The piston rod comprises a sealing portion and a guide column arranged on a side wall of the piston rod;

[0019] The guide column is matched with the arc groove.

[0020] As a preferred solution of the wastewater pretreatment device of a thermal power plant of the present invention, wherein: the sewage discharge pipe includes a guide sleeve arranged inside the guide sleeve, and a waist hole is opened inside the guide sleeve;

[0021] The connecting sleeve rod is arranged inside the guide sleeve; the piston rod passes through the guide sleeve and extends to the outside thereof;

[0022] The guide post is adapted to the guide sleeve;

[0023] The piston rod moves in the vertical direction to drive the movable sleeve to rotate.

[0024] As a preferred solution of the wastewater pretreatment device for a thermal power plant of the present invention, wherein: the regulating member penetrates the sewage pipe and extends into the interior thereof;

[0025] The end of the adjusting member is connected to the elastic member; the elastic member can be compressed when the adjusting member moves.

[0026] As a preferred solution of the wastewater pretreatment device for a thermal power plant of the present invention, the touch-pressure member comprises a touch-pressure switch and a pressure rod arranged at the end of the touch-pressure switch;

[0027] The pressure rod comprises a head and a rod, and a neck for connecting the head and the rod;

[0028] The head penetrates into the interior of the sewage pipe.

[0029] As a preferred solution of the wastewater pretreatment device for a thermal power plant of the present invention, the movable pipe sleeve comprises a slide groove arranged on the outside thereof, the slide groove comprises a reset surface arranged at the end thereof, and a notch penetrating the slide groove;

[0030] The head penetrates through the slide groove and extends into the interior thereof;

[0031] The reset surface abuts against the head portion and can push the rod portion to contact the touch switch contact point.

[0032] As a preferred solution of the wastewater pretreatment device for a thermal power plant of the present invention, wherein: the sewage outlet is connected to the sewage pipe;

[0033] A motor for driving the scraper rod to rotate is installed on the top of the tank body;

[0034] The motor is electrically connected to the contact-pressure member, and the scraper rod is in contact with the inner wall of the filter screen.

[0035] The beneficial effects of the present invention are as follows: the present invention can significantly improve the filtering efficiency and ensure faster wastewater treatment and reduce the processing time by reducing the accumulation of impurities inside the filter; at the same time, it makes the maintenance and cleaning operations of the filter easier, saving manpower and time costs; in addition, the reduction of impurity accumulation will also reduce the wear of the filter and related components, thereby extending the service life of the equipment and reducing maintenance and replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 This is a schematic diagram of the sewage discharge unit structure of the wastewater pretreatment device in a thermal power plant.

[0038] Figure 2 This is a half-section view of the sewage discharge unit of the wastewater pretreatment device of a thermal power plant.

[0039] Figure 3 Wastewater pretreatment device for thermal power plants Figure 2 A partial enlarged view of point A.

[0040] Figure 4This is a partial cross-sectional view of the sewage pipe of the wastewater pretreatment device of a thermal power plant.

[0041] Figure 5 This is a schematic diagram of the explosion structure of the sewage discharge unit of the wastewater pretreatment device of a thermal power plant.

[0042] Figure 6 Wastewater pretreatment device for thermal power plants Figure 5 Enlarged view of the structure at B.

[0043] Figure 7 This is a schematic diagram of the three-dimensional structure of the wastewater pretreatment device in a thermal power plant.

[0044] Figure 8 This is a partial cross-sectional view of the wastewater pretreatment device in a thermal power plant.

[0045] In the figure: 100, sewage unit; 101, sewage pipe; 1011, impurity removal port; 1012, guide sleeve; 10121, waist hole; 102, fixed sleeve; 1021, first through hole; 103, movable sleeve; 1031, second through hole; 1032, extension plate; 1033, connecting sleeve rod; 10331, arc groove; 1034, slide groove; 10341, reset surface; 10342, notch; 104, piston rod ; 1041, sealing part; 1042, guide column; 105, elastic part; 106, adjusting part; 107, touch-pressure part; 1071, touch-pressure switch; 1072, pressure rod; 10721, head; 10722, neck; 10723, rod; 200, filter unit; 201, tank body; 2011, water inlet; 2012, water filter outlet; 2013, sewage outlet; 202, filter screen; 203, scraper rod; M, motor. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0047] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0048] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0049] Example 1

[0050] Reference Figure 1 to Figure 3 and Figure 7 , Figure 8 , is the first embodiment of the present invention, which provides a wastewater pretreatment device for a thermal power plant, comprising a sewage unit 100, including a sewage pipe 101, a fixed sleeve 102 arranged inside the sewage pipe 101, a movable sleeve 103 arranged outside the fixed sleeve 102, a piston rod 104 arranged at the end of the movable sleeve 103, an elastic member 105 arranged at the bottom of the piston rod 104 and in conflict with it, an adjusting member 106 passing through the bottom of the sewage pipe 101, and a contact pressure member 107 arranged on the side wall of the sewage pipe 101; the fixed sleeve 102 includes a first through hole 1021 opened on the side wall thereof, and the movable sleeve 103 includes a second through hole 1031 opened on the side wall thereof; the piston rod 104 can be pressed to drive the movable sleeve 103 to rotate, thereby achieving the overlap of the first through hole 1021 and the second through hole 1031.

[0051] In this embodiment, the sewage pipe 101 adopts a three-way pipe structure and is hollow inside; the top of the fixed sleeve 102 is a conical structure, and its larger opening can ensure that more water can enter the fixed sleeve 102; the bottom of the fixed sleeve 102 is a vertical cylindrical structure, and the fixed sleeve 102 is adapted to the movable sleeve 103; the movable sleeve 103 is sleeved on the outside of the first through hole 1021, and the movable sleeve 103 is located on the outside of the fixed sleeve 102 and can rotate, and the fixed sleeve 102 and the movable sleeve 103 form an enclosed space.

[0052] Specifically, the positions of the first through hole 1021 and the second through hole 1031 correspond to each other. Under normal circumstances, the positions of the second through hole 1031 and the first through hole 1021 are staggered, and the first through hole 1021 is in a blocked state; when the movable sleeve 103 rotates to connect the first through hole 1021 with the second through hole 1031, impurities located inside the first through hole 1021 can be discharged from the fixed sleeve 102 together with the fluid.

[0053] It should be noted that the piston rod 104 is arranged inside the fixed sleeve 102, and the end of the piston rod 104 is tightly attached to the inner wall of the fixed sleeve 102; when the piston rod 104 moves along the axis of the fixed sleeve 102 under pressure, it can drive the movable sleeve 103 to rotate, thereby realizing the blocking and opening of the first through hole 1021.

[0054] Preferably, the elastic member 105 is arranged at the bottom of the piston rod 104, and the end of the elastic member 105 is in conflict with the piston rod 104; under normal circumstances, when the fluid pressure is normal, the elastic member 105 pushes the piston rod 104 to move through the elastic force, so that the piston rod 104 is located at a suitable position inside the fixed sleeve 102. In this state, the first through hole 1021 is in a closed state; when the fluid pressure is greater than the rebound force of the elastic member 105, the piston rod 104 is pressed to move in the direction close to the elastic member 105, and the elastic member 105 will be gradually compressed.

[0055] Specifically, the adjusting member 106 is located at the bottom of the sewage pipe 101 and can be telescopically moved. The adjusting member 106 is in conflict with the other end of the elastic member 105. When the adjusting member 106 compresses the elastic member 105 to a certain extent, the elastic member 105 has been subjected to force. At this time, the elastic member 105 is compressed again, and the required pressure will increase, thereby changing the fluid pressure required to push the piston rod 104 to move, thereby achieving the threshold for adjusting the fluid pressure of the device.

[0056] Furthermore, the filtration unit 200 includes a tank body 201, a filter screen 202 arranged inside the tank body 201, and a scraper rod 203 arranged at a central position inside the tank body 201; the tank body 201 includes a water inlet 2011 arranged above it, a water filter outlet 2012 arranged below the tank body 201, and a sewage outlet 2013 arranged at the bottom of the tank body 201; the filter screen 202 is arranged between the water inlet 2011 and the water filter outlet 2012.

[0057] In this embodiment, the filter screen 202 is arranged inside the tank body 201, and the filter screen 202 is located between the water inlet 2011 and the water filter outlet 2012, which can ensure that the sewage enters the tank body 201 from the water inlet, and after being filtered by the filter screen 202, the filtered preliminary treated water can be discharged through the water filter outlet 2012, so as to facilitate the subsequent treatment of the sewage.

[0058] When in use, when the filter screen inside the tank body is attached with more impurities, its water filtering performance is reduced, but with the continuous entry of sewage, the liquid pressure inside the tank body increases, and when the liquid pressure is greater than the rebound force of the elastic member 105, the piston rod 104 is pressed and moves along the axial direction of the fixed sleeve 102. During the movement of the piston rod 104, the movable sleeve 103 is driven to rotate, so that the second through hole 1031 corresponds to the position of the first through hole 1021, so that the first through hole 1021 is in a smooth state. At this time, the pressurized sewage, carrying the impurities deposited at the bottom of the tank body, is discharged from the sewage pipe 101, thereby effectively cleaning the impurities inside the tank body.

[0059] Example 2

[0060] Reference Figure 1 to Figure 6, which is the second embodiment of the present invention, and which is different from the first embodiment in that: it also includes, in the previous embodiment, the wastewater pretreatment device of a thermal power plant includes, the sewage pipe 101 includes a debris removal port 1011 passing through its side wall; the first through hole 1021 coincides with the axis of the debris removal port 1011, and the movable pipe sleeve 103 is arranged inside the sewage pipe 101.

[0061] In this embodiment, the impurity removal port 1011 is located on the side wall of the sewage pipe 101, and the impurity removal port 1011 is connected to the sewage pipe 101; the position between the fixed sleeve 102 and the sewage pipe 101 is relatively fixed, the axis of the first through hole 1021 coincides with the axis of the impurity removal port 1011, and the opening direction of the first through hole 1021 is located on the side close to the impurity removal port 1011; and the movable pipe sleeve 103 is located inside the sewage pipe 101.

[0062] Furthermore, the movable sleeve 103 is movably connected to the fixed sleeve 102; an extension plate 1032 is provided on the outer wall of the movable sleeve 103, and the extension plate 1032 is embedded in the inner wall of the sewage pipe 101 and can rotate.

[0063] In this embodiment, the movable pipe sleeve 103 is sleeved on the outside of the fixed sleeve 102, and the movable pipe sleeve 103 is rotatable; an annular groove matched with the extension plate 1032 is opened at the lower position of the impurity removal port 1011, and the extension plate 1032 is embedded in the inner wall of the sewage pipe 101 and is located inside the sewage pipe 101 and can rotate; thereby ensuring that the sewage will not fall to the bottom of the sewage pipe 101 during the discharge process; to a certain extent, it can better facilitate the cleaning of impurities.

[0064] Furthermore, the movable sleeve 103 includes a connecting sleeve rod 1033 arranged at its end, and an arc groove 10331 is opened on the inner wall of the connecting sleeve rod 1033; the piston rod 104 includes a sealing portion 1041 and a guide column 1042 arranged on the side wall of the piston rod 104; the guide column 1042 is adapted to the arc groove 10331.

[0065] In this embodiment, the outer side of the sealing part 1041 is made of rubber material, and the outer wall of the sealing part 1041 is in close contact with the inner wall of the fixed sleeve 102; the sealing part 1041 is located inside the fixed sleeve 102, and the top end does not exceed the bottom arc of the first through hole 1021, and the bottom end does not exceed the bottom of the fixed sleeve 102.

[0066] It should be noted that the connecting sleeve rod 1033 is arranged at the bottom of the movable sleeve 103, and an arc groove is opened on the side wall of the connecting sleeve rod 1033, and the guide column 1042 is adapted to the arc groove 10331, so that the movement of the piston rod 104 can drive the movable sleeve 103 to rotate.

[0067] Furthermore, the sewage pipe 101 includes a guide sleeve 1012 arranged inside it, and a waist hole 10121 is opened inside the guide sleeve 1012; the connecting sleeve rod 1033 is arranged inside the guide sleeve 1012; the piston rod 104 passes through the guide sleeve 1012 and extends to the outside thereof; the guide column 1042 is adapted to the guide sleeve 1012; the piston rod 104 moves in the vertical direction to drive the movable pipe sleeve 103 to rotate.

[0068] It should be noted that the connecting sleeve rod 1033 passes through the guide sleeve 1012 and extends to its outside, and the piston rod 104 passes through the connecting sleeve rod 1033 and extends to its outside; the inner wall of the guide sleeve 1012 is provided with a waist hole 10121 arranged along the vertical direction; the guide column 1042 passes through the arc groove 10331 and extends to the inside of the waist hole 10121. Through the limitation of the waist hole 10121, the piston rod 104 can only move back and forth along the axial direction of the guide sleeve 1012. During the movement of the piston rod 104, the outer wall of the guide column 1042 squeezes the inner wall of the arc groove 10331, which can drive the movable pipe sleeve 103 to flip at a certain angle.

[0069] Furthermore, the adjusting member 106 penetrates through the sewage pipe 101 and extends into the interior thereof; the end of the adjusting member 106 is connected to the elastic member 105 ; the movement of the adjusting member 106 can compress the elastic member 105 .

[0070] It should be noted that the adjusting member 106 adopts a screw structure. By cooperating with the threaded structure opened at the bottom of the sewage pipe 101, the adjusting member 106 can be driven and spirally fed by rotating, thereby realizing compression of the elastic member 105 by the end of the adjusting member 106; the elastic member 105 is preferably a spring, and the two ends of the elastic member 105 respectively conflict with the bottom of the piston rod 104 and the top of the adjusting member 106.

[0071] Specifically, by rotating the adjusting member 106 to compress the elastic member 105 and controlling the amount of compression of the elastic member 105, the pressure value required for the liquid to push the piston rod 104 to move can be changed, thereby making it easier for the operator to operate.

[0072] Furthermore, the touch-pressure member 107 includes a touch-pressure switch 1071 and a pressure rod 1072 arranged at the end of the touch-pressure switch 1071; the pressure rod 1072 includes a head 10721 and a rod 10723, and a neck 10722 for connecting the head 10721 and the rod 10723; the head 10721 penetrates into the interior of the sewage pipe 101.

[0073] In this embodiment, the touch-pressure switch 1071 is a common existing touch-pressure switch. When the contact of the touch-pressure switch 1071 feels pressure for a long time, the corresponding driving device can be started; and the touch-pressure switch 1071 is installed on the outer wall of the sewage pipe 101.

[0074] It should be noted that the pressure rod 1072 is arranged on one side of the touch switch 1071, and the pressure rod 1072 is movable; the head 10721 is an arc-shaped structure, and the neck 10722 is a cylindrical structure with a smaller radius, and the neck 10722 connects the head 10721 and the rod 10723; the end of the head 10721 is arranged inside the sewage pipe 101.

[0075] Furthermore, the movable sleeve 103 includes a slide groove 1034 arranged on its outer side, and the slide groove 1034 includes a reset surface 10341 arranged at its end, and a notch 10342 passing through the slide groove 1034; the head 10721 passes through the slide groove 1034 and extends to the inside thereof; the reset surface 10341 is in contact with the head 10721 and can push the rod 10723 to contact the contact of the touch switch 1071.

[0076] In this embodiment, the slide groove 1034 is arranged on the outer wall of the movable sleeve 103, and the position of the slide groove 1034 corresponds to the position of the pressure rod 1072; a reset surface 10341 is arranged at one end of the slide groove 1034, and a notch 10342 is opened on one side of the reset surface 10341; the size of the notch 10342 is adapted to the head 10721, so that the head 10721 can slide out from the inside of the slide groove 1034.

[0077] It should be noted that when the movable tube sleeve 103 drives the second through hole 1031 to rotate in the direction close to the first through hole 1021, one end of the slide groove 1034 is a convex structure, so that the head 10721 can be located inside the slide groove 1034, and the neck 10722 passes through the side wall of the slide groove 1034 and extends outward; in this state, the pressure rod 1072 will not be pushed to move to contact the contact of the touch switch 1071.

[0078] Specifically, during the rotation of the movable tube sleeve 103, when the positions of the second through hole 1031 and the first through hole 1021 gradually overlap, as the movable tube sleeve 103 rotates, the notch 10342 and the head 10721 overlap, continuing to rotate the movable tube sleeve 103 can make the head 10721 slide out from the notch 10342, thereby separating the head 10721 from the slide groove 1034.

[0079] Preferably, when the second through hole 1031 is completely overlapped with the first through hole 1021, the reset surface 10341 is located on one side of the head 10721; at this time, the movable sleeve 103 is rotated in the opposite direction so that the reset surface 10341 conflicts with the head 10721. As the flipping angle of the movable sleeve 103 gradually increases, the reset surface 10341 gradually squeezes the head 10721 and pushes the pressure rod 1072 to approach the contact of the touch-pressure switch 1071. When the movable sleeve 103 is flipped over and the surface of the slide groove 1034 conflicts with the head 10721, the pressure rod 1072 is squeezed by the slide groove 1034, so that the pressure rod 1072 conflicts with the contact of the touch-pressure switch 1071.

[0080] In summary, the present invention can significantly improve the filtering efficiency and ensure faster wastewater treatment and reduce the processing time by reducing the accumulation of impurities inside the filter; at the same time, it makes the maintenance and cleaning operations of the filter easier, saving manpower and time costs; by controlling the discharge of impurities, the control switch can be triggered to start the motor to drive the scraper to clean the surface of the filter.

[0081] Example 3

[0082] Reference Figure 1 and Figure 2 , Figure 7 and Figure 8 , which is the third embodiment of the present invention, and which is different from the previous two embodiments in that: it also includes that the bottom of the tank body 201 is a conical structure, so that the impurities located inside the tank body 201 can be deposited at the bottom of the tank body 201, and can flow to the inside of the sewage discharge unit 100 through the sewage discharge port 2013 set at the bottom of the tank body 201, and then the impurities located at the bottom of the tank body 201 can be discharged through the sewage discharge unit 100.

[0083] Furthermore, the sewage outlet 2013 is connected to the sewage pipe 101 ; a motor M for driving the scraper rod 203 to rotate is installed on the top of the tank body 201 ; the motor M is electrically connected to the contact pressure member 107 , and the scraper rod 203 is in conflict with the inner wall of the filter screen 202 .

[0084] It should be noted that the sewage outlet 2013 is connected to the sewage pipe 101; the sewage inside the tank body 201 can be discharged into the sewage pipe 101 through the sewage outlet 2013; the motor M is arranged at the top of the tank body 201, and the motor M is connected to the touch pressure switch 1071. When the contacts of the touch pressure switch 1071 are pressurized, the motor M starts to start and can drive the scraper rod 203 to rotate.

[0085] Specifically, the scraper rod 203 is in conflict with the inner wall of the filter 202. During the rotation, the scraper rod 203 can drive the impurities remaining on the inner wall of the filter 202 to be cleaned, so that the filter 202 maintains good water filtering performance, so that sewage filtering can be carried out efficiently.

[0086] When in use, when the filter holes of the filter screen 202 are affected by impurities, the water filtering performance of the filter screen 202 is reduced; then the amount of sewage entering the tank body 201 through the water inlet 2011 does not decrease, thereby increasing the internal pressure of the tank body 201; when the internal pressure of the tank body 201 increases to a certain value, the fluid pressure pushes the piston rod 104 to move in the direction close to the elastic member 105 and compresses the elastic member 105. During the movement of the piston rod 104, the movable sleeve 103 is driven to rotate, so that the second through hole 1031 and the first through hole 1021 are completely overlapped; then the pressurized sewage brings the impurities deposited at the bottom of the tank body 201 out of the tank body 201 through the impurity removal port 1011; during the impurity removal process, the pressure inside the tank body 201 gradually returns to normal, and at this time the elastic member 105 releases The elastic potential energy pushes the piston rod 104 to move in the opposite direction, and the movement of the piston rod 104 drives the movable sleeve 103 to rotate, so that the second through hole 1031 is staggered with the first through hole 1021. During the rotation, the reset surface 10341 contacts the pressure rod 1072, and the pressure rod 1072 is pressed to contact the contact of the touch-pressure switch 1071; the touch-pressure switch 1071 controls the motor M to start, so that the scraper rod 203 cleans the inner wall of the filter 202 to ensure the good water filtering performance of the filter 202; after the filter 202 is cleaned, the sewage is filtered and discharged through the water filter port 2012. When the piston rod 104 moves to the appropriate position, the pressure rod 1072 is staggered with the slide groove 1034, the pressure rod 1072 no longer squeezes the contact of the touch-pressure switch 1071, and the motor M stops working.

[0087] In summary, the present invention can significantly improve the filtration efficiency and ensure faster wastewater treatment and reduce processing time by reducing the accumulation of impurities inside the filter; at the same time, it makes the maintenance and cleaning operations of the filter easier, saving manpower and time costs; in addition, the reduction in impurity accumulation will also reduce the wear of the filter and related components, thereby extending the service life of the equipment and reducing maintenance and replacement costs.

[0088] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A wastewater pretreatment device for a thermal power plant, characterized in that: include, A sewage discharge unit (100), comprising a sewage discharge pipe (101), a fixed sleeve (102) arranged inside the sewage discharge pipe (101), a movable sleeve (103) arranged outside the fixed sleeve (102), a piston rod (104) arranged at the end of the movable sleeve (103), an elastic member (105) arranged at the bottom of the piston rod (104) and in contact with the piston rod (104), an adjusting member (106) passing through the bottom of the sewage discharge pipe (101), and a contact member (107) arranged on the side wall of the sewage discharge pipe (101); The fixed sleeve (102) comprises a first through hole (1021) opened on a side wall thereof, and the movable sleeve (103) comprises a second through hole (1031) opened on a side wall thereof; The piston rod (104) is pressurized to drive the movable sleeve (103) to rotate, thereby achieving the overlap of the first through hole (1021) and the second through hole (1031); A filtering unit (200) comprising a tank body (201), a filter screen (202) arranged inside the tank body (201), and a scraper rod (203) arranged at a central position inside the tank body (201); The tank body (201) comprises a water inlet (2011) arranged on the top thereof, a water filter outlet (2012) arranged on the bottom of the tank body (201), and a sewage outlet (2013) arranged on the bottom of the tank body (201); The filter screen (202) is arranged between the water inlet (2011) and the water filter outlet (2012); The sewage discharge pipe (101) comprises a debris removal port (1011) penetrating through a side wall thereof; The axis of the first through hole (1021) coincides with the axis of the impurity removal opening (1011). The movable pipe sleeve (103) is arranged inside the sewage discharge pipe (101); The movable sleeve (103) is movably connected to the fixed sleeve (102); An extension plate (1032) is provided on the outer wall of the movable pipe sleeve (103), and the extension plate (1032) is embedded in the inner wall of the sewage pipe (101) and is rotatable; The movable pipe sleeve (103) comprises a connecting sleeve rod (1033) arranged at an end thereof, and an arc-shaped groove (10331) is formed on the inner wall of the connecting sleeve rod (1033); The piston rod (104) comprises a sealing portion (1041) and a guide column (1042) arranged on a side wall of the piston rod (104); The guide column (1042) is adapted to the arc-shaped groove (10331); The sewage discharge pipe (101) comprises a guide sleeve (1012) arranged inside the guide sleeve (1012), and a waist hole (10121) is provided inside the guide sleeve (1012); The connecting sleeve rod (1033) is arranged inside the guide sleeve (1012); the piston rod (104) passes through the guide sleeve (1012) and extends to the outside thereof; The guide column (1042) is adapted to the guide sleeve (1012); The piston rod (104) can drive the movable sleeve (103) to rotate when it moves in the vertical direction; The touch-pressure member (107) comprises a touch-pressure switch (1071) and a pressure rod (1072) arranged at the end of the touch-pressure switch (1071); The pressure rod (1072) comprises a head (10721) and a rod (10723), and a neck (10722) used to connect the head (10721) and the rod (10723); The head (10721) penetrates into the interior of the sewage discharge pipe (101); The movable sleeve (103) comprises a slide groove (1034) arranged on the outside thereof, and the slide groove (1034) comprises a reset surface (10341) arranged at the end thereof, and a notch (10342) passing through the slide groove (1034); The head (10721) passes through the slide groove (1034) and extends into the interior thereof; The resetting surface (10341) abuts against the head (10721) and can push the rod (10723) to contact the contact point of the touch-pressure switch (1071); The sewage outlet (2013) is connected to the sewage pipe (101); A motor (M) for driving the scraper rod (203) to rotate is installed on the top of the tank body (201); The motor (M) is electrically connected to the contact-pressure member (107), and the scraper rod (203) is in contact with the inner wall of the filter screen (202).

2. The thermal power plant wastewater pretreatment device according to claim 1, characterized in that: The regulating member (106) penetrates the sewage discharge pipe (101) and extends into the interior thereof; The end of the adjusting member (106) is connected to the elastic member (105); the elastic member (105) can be compressed when the adjusting member (106) moves.

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