Sludge concentration device and method for aeration and sedimentation integrated tank

Abstract

The invention provides a sludge concentration device and method for an aeration and sedimentation integrated tank. The sludge concentration device comprises a tank body with a conical area at the bottom end; the top end of the sludge inlet pipe is connected with a dosing pipe in parallel, and the bottom end of the sludge inlet pipe penetrates through the center in the tank body; the mud distribution pipes are distributed in a cross shape and are communicated with the mud inlet pipe; the supernate collecting pipes are distributed at the upper part and the middle part of the tank body and are connected in parallel with water outlets; the ultrasonic mud level meter is fixed on one side of the top surface of the tank body; by arranging the dosing pipe and the pipeline mixer at the front end of the sludge inlet pipe, a flocculating agent can be fully mixed with sludge water in a pipeline, and by arranging the sludge distribution pipe at the tail end of the sludge inlet pipe, sludge mixed with drugs is uniformly distributed everywhere of the tank body, so that the sludge dewatering efficiency can be improved, and meanwhile, the concentration of the sludge can be increased by utilizing the conical area; and the self-cleaning filter screen is arranged above the sludge distribution pipe, so that the sludge can be further filtered, and the dewatering speed of the sludge is increased.

Description

Technical Field

[0001] The present invention relates to the field of sludge thickening, and more specifically, to a sludge thickening device and method for an integrated aeration and sedimentation tank. Background Art

[0002] With the continuous update and development of sewage treatment technologies, the new integrated aeration and sedimentation tank technology reduces the floor area by superposing the sedimentation tank and the aerobic tank in situ, and at the same time increases the treatment capacity of water, showing broad market potential.

[0003] In a common sedimentation tank, high-concentration sludge can be discharged at the bottom after gravity thickening and sedimentation. However, the integrated aeration and sedimentation tank technology uses a three-phase separator and selects to discharge sludge from the aerobic tank. Therefore, the sludge discharge concentration is significantly lower, and it is necessary to further increase the sludge concentration, reduce the moisture content and volume reduction to reduce the sludge transportation cost and meet the sludge inlet requirements of traditional sludge dewatering devices.

[0004] Therefore, we make improvements in this regard and propose a sludge thickening device and method for an integrated aeration and sedimentation tank. Summary of the Invention

[0005] The purpose of the present invention is to address the problems of low sludge discharge concentration in the aerobic tank, insufficient sludge water content and sludge concentration dehydration effect during sludge discharge by traditional sludge dewatering devices.

[0006] To achieve the above-mentioned invention purposes, the present invention provides a sludge thickening device and method for an integrated aeration and sedimentation tank to improve the above problems.

[0007] Specifically, this application is as follows:

[0008] A sludge thickening device for an integrated aeration and sedimentation tank, comprising:

[0009] A tank body with a conical area at the bottom end;

[0010] A sludge inlet pipe with a chemical dosing pipe connected in parallel at the top end, and the bottom end of the sludge inlet pipe penetrates through the center inside the tank body;

[0011] A sludge distribution pipe distributed in a cross shape and communicating with the sludge inlet pipe;

[0012] A supernatant collection pipe distributed in the upper and middle parts of the tank body and with outlets connected in parallel;

[0013] An ultrasonic sludge level gauge fixed on one side of the top surface of the tank body;

[0014] A flow-blocking one-way valve with valve pieces elastically connected on both sides and a return spring elastically connected to the end of the valve piece, and the flow-blocking one-way valve is fixed in the middle of the bottom end of the sludge inlet pipe;

[0015] The filter surface is provided with staggered and overlapped self-cleaning filter screens that can be reset by elastic force. The self-cleaning filter screens are fixed inside the tank body and located above the flow-blocking one-way valve. The self-cleaning filter screens are connected to the inside of the mud inlet pipe.

[0016] The sludge is mixed with medicine in the dosing pipe at the front end of the mud inlet pipe and then flows into the top of the blocking one-way valve. The sludge above the blocking one-way valve flows into the self-cleaning filter and drives it to expand. The kinetic energy of the sludge above the blocking one-way valve increases due to the obstruction, driving the blocking one-way valve to open. The sludge above the blocking one-way valve flows into the mud distribution pipe through its valve port. The sludge inside the mud distribution pipe is evenly dispersed throughout the tank body. The sludge inside the tank body is blocked by the self-cleaning filter to separate the mud and water.

[0017] As a preferred technical solution of the present application, the bottom end of the conical area is connected to a mud discharge electric valve, the mud outlet below the mud discharge electric valve is connected to a mud discharge pipe, and the position where the bottom end of the tank body is connected to the conical area is fixed with annular equidistantly distributed support columns.

[0018] As a preferred technical solution of the present application, a pipeline mixer is connected to the middle part of the front end of the mud inlet pipe, the position where the dosing pipe is connected to the mud inlet pipe is located in front of the pipeline mixer, the middle part of the dosing pipe is connected to a dosing electric valve, the end of the dosing pipe away from the mud inlet pipe is connected to a dosing flowmeter, the bottom end of the dosing flowmeter is connected to a dosing pump, the top of the front end of the mud inlet pipe is connected to a mud discharge flowmeter, and the end of the mud discharge flowmeter away from the mud inlet pipe is connected to an aerobic zone mud discharge pump.

[0019] As a preferred technical solution of the present application, a diverter box is provided at one end of the mud distribution pipe connected to the mud inlet pipe, the mud distribution pipe is connected in parallel to the bottom end of the mud inlet pipe through the diverter box, and mud distribution holes are arranged equidistantly on both sides of the mud distribution pipe.

[0020] As a preferred technical solution of the present application, the supernatant collecting pipe includes a middle pipe and an upper pipe, the middle pipe is horizontally penetrated in the middle of the tank body, the upper pipe is horizontally penetrated in the top of the tank body, the middle pipe and the upper pipe are provided with equidistantly arranged arc-shaped holes on the top, the end of the upper pipe away from the tank body is bent to the bottom and connected with the middle pipe, the end of the middle pipe away from the tank body is connected to an intermediate water level electric valve, the water outlet of the intermediate water level electric valve is connected to a clean water pipe, and the middle of the clean water pipe is connected to a clean water pump.

[0021] As a preferred technical solution of the present application, an online turbidity meter is provided on the outer side of the front of the tank body, and the water inlets at the upper and lower ends of the online turbidity meter are connected to the upper and lower sides of the tank body.

[0022] As a preferred technical solution of the present application, the flow-blocking check valve includes a valve stem, both ends of the valve stem are fixed on the inner wall of the mud inlet pipe, symmetric first hinge rods are arranged through the bottoms on both sides of the valve stem, hairspring springs are sleeved at both ends of the first hinge rods, a valve disc is sleeved outside the first hinge rods, the valve disc is elastically connected to the first hinge rods through the hairspring springs, a second hinge rod is arranged through the bottom of the end of the valve disc away from the first hinge rod, a return spring is sleeved outside the second hinge rod, return elastic pieces are hinged at both ends of the second hinge rod, the return elastic pieces are elastically connected to the second hinge rod through the return spring, symmetric valve disc limit boxes are fixed on both sides of the outer wall of the position where the mud inlet pipe is connected to the flow-blocking check valve, an activity cavity is opened inside the valve disc limit box, a return spring is arranged inside the activity cavity, a sliding piece is arranged at one end of the return spring close to the mud inlet pipe, a wedge rod is fixed on the side of the sliding piece facing away from the return spring, the wedge rod penetrates inside the mud inlet pipe, and the bottom of the outer wall of the return elastic piece abuts against the surface of the wedge rod.

[0023] As a preferred technical solution of the present application, the self-cleaning filter screen includes a fixed ring frame, the fixed ring frame is fixed on the inner wall of the tank body, a cross isolation frame is connected in the middle of the fixed ring frame, fan-shaped filtering areas of equal size are formed inside the fixed ring frame through the cross isolation frame, fixed filter nets are arranged on both sides of the symmetric ends of the fan-shaped filtering areas, fan-shaped sliding areas are opened on the other two sides of the fan-shaped filtering areas, sliding filter nets are arranged inside the fan-shaped sliding areas, a front-end blocking strip is connected to one end of the sliding filter net, the bottom surface of one end of the front-end blocking strip is attached and slides on the top surface of the fan-shaped sliding area, a positioning slide rod is arranged outside the sliding filter net, one end of the positioning slide rod is fixed on the side surface of the front-end blocking strip, the other end of the positioning slide rod is opposite to the center of the fixed ring frame, a positioning driving hole is opened at the center of the surface of the fixed ring frame close to the positioning slide rod, the positioning slide rod slides inside the positioning driving hole, a tail-end scraping plate is fixed on the end of the sliding filter net away from the front-end blocking strip, a self-cleaning limit groove is opened at the position of the cross isolation frame close to the tail-end scraping plate, the end of the sliding filter net away from the front-end blocking strip is attached and slides inside the self-cleaning limit groove, the side surface of the tail-end scraping plate is attached to the outer wall of the self-cleaning limit groove, the bottom surface of the tail-end scraping plate is attached to the top surface of the fixed filter net, a return pulling block is fixed at one end of the sliding filter net close to the center of the cross isolation frame, a shunt driving pipe is communicated above one end of the positioning driving hole away from the positioning slide rod, the other end of the shunt driving pipe is communicated with the inside of the mud inlet pipe, and a mud discharge small hole is opened at one end of the positioning driving hole away from the positioning slide rod.

[0024] As a preferred technical solution of the present application, on both sides of the center of the cross isolation frame, a return annular frame is fixed. An arc-shaped pulling groove is formed on the outer wall side of the return annular frame. A return pulling spring is arranged inside the arc-shaped pulling groove. One end of the return pulling spring is fixed to the arc-shaped pulling groove, and the other end of the return pulling spring is fixed to the outer wall of the return pulling block. The return pulling block slides inside the arc-shaped pulling groove. On the outer wall side of the front baffle strip, vertical plates are connected in an equidistant arrangement. Symmetric through-hole cones are fixed on both sides of the bottom end of the vertical plate, and the through-hole cones are inserted into the mud distribution holes.

[0025] The present invention provides a method for using a sludge thickening device for an integrated aeration and sedimentation tank, which includes the following steps:

[0026] S1: The sludge with a lower concentration is discharged by the sludge discharge pump in the aerobic zone to the sludge discharge pipe, and the sludge discharge flowmeter records the sludge discharge flow rate.

[0027] S2: The flocculant enters the dosing pipe through the dosing pump. The dosing electric valve controls the flow rate, and the dosing flowmeter records the flow rate. The flocculant and the sludge are mixed and fully reacted through the pipeline mixer.

[0028] S3: After mixing, the sludge accumulates pressure at the position of the flow-blocking one-way valve and simultaneously flows into the positioning driving hole through the shunt driving pipe. The sludge entering the positioning driving hole pushes the positioning slide rod to drive the sliding filter net and the fixed filter net to be staggered and unfolded. The sliding filter net unfolds to form an annular closure with the fixed filter net.

[0029] S4: After the self-cleaning filter net is unfolded, the sludge pressure passes through the flow-blocking one-way valve and reaches the mud distribution pipe through the mud inlet pipe, forming a stable flow state dispersion at the mud distribution holes.

[0030] S5: The mixed sludge enters the tank body. The upward flowing sludge is blocked by the self-cleaning filter net to separate the mud and water. Under the continuous action of the stable flow state and the relative residence time, the chemical flocculation fully takes effect, and at the same time, the mud and water are separated by gravity. The thicker sludge gradually deposits in the conical area of the tank body, and the separated water forms the supernatant.

[0031] S6: During the continuous mud and water separation process, the ultrasonic sludge level meter monitors the height of the sludge deposited at the bottom, and the turbidity meter with adjustable height monitors the clarity of the effluent.

[0032] S7: The dosing and sludge discharge flow rates are controlled through the feedback data of the ultrasonic sludge level meter and the turbidity meter to achieve the required control parameters. After the supernatant meets the clarity requirements, it enters the supernatant collection pipe and is discharged through the clear water pipe by the clear water pump. The requirements for clear water discharge are determined by the quality of the clear water.

[0033] S8: Since the volume of the sludge is greatly reduced after thickening, sludge discharge is only required intermittently. The height of the sludge layer is monitored by an ultrasonic sludge level gauge and a turbidity meter. When the control requirement parameters are reached, the sludge is further thickened in the conical area of the tank body. The discharge of the thickened sludge is controlled by the sludge discharge electric valve of the tank body. The thickened sludge is discharged to the sludge storage area through the sludge discharge pipe of the tank body. After reaching the storage capacity requirement, it can be transported to a filter press or a dryer for treatment;

[0034] S9: The above-mentioned sludge thickening and supernatant drainage can operate continuously for a long time. If the aerobic zone of the aeration sedimentation integrated tank has discharged the set volume of sludge, the chemical dosing and the operation of the sludge discharge pump in the aerobic zone can be ended. After stopping for a period of time, the intermediate water level electric valve can be opened to discharge most of the clear water in the tank body. The sludge discharge electric valve of the tank body is opened briefly to discharge part of the remaining thickened sludge and lower the liquid level below the mud distribution pipe;

[0035] S10: Before the start of the next round of sludge discharge, due to the inclined plane in the conical area of the tank body, the sludge remaining here undergoes anaerobic digestion and generates relatively light floating sludge. The sludge discharge pump in the aerobic zone can be briefly opened to discharge sludge at a large flow rate. Through the effective distribution of the sludge by the mud distribution pipe, the floating sludge on the liquid surface under the mud distribution pipe can be remixed and precipitated again. There may still be a small amount of floating sludge, which can be quickly removed through the arc-shaped structure of the supernatant collection pipe. That is, the initially clarified water cannot be directly discharged as the final effluent and needs to enter a high-efficiency or regulating tank. After completion, further operations can be carried out.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] In the solution of the present application: by providing a chemical dosing pipe and a pipe mixer at the front end of the sludge inlet pipe, the flocculant can be fully mixed with the sludge water in the pipeline. By providing a mud distribution pipe at the tail end of the sludge inlet pipe, the sludge mixed with the drug can be evenly distributed throughout the tank body, which can improve the sludge dewatering efficiency. At the same time, the conical area can be used to increase the sludge concentration, and a self-cleaning filter screen is provided above the mud distribution pipe, which can further filter the sludge and improve the sludge dewatering speed.

[0038] 1. The present invention is provided with a chemical dosing pipe communicating with the top end of the sludge inlet pipe, and is equipped with a chemical dosing pump and a chemical dosing electric valve to control the chemical dosing amount, which can automatically add drugs to the inside of the sludge. At the same time, a pipe mixer is provided in the middle of the sludge inlet pipe, which can mix the drug after chemical dosing with the sludge water, so that when the sludge water is discharged, the sludge can quickly precipitate to complete the separation of mud and water.

[0039] 2. The present invention is provided with a mud distribution pipe with a cross-shaped distribution and multiple mud distribution holes opened horizontally at the tail end of the sludge inlet pipe, which can evenly transport the sludge water mixed with the drug to various parts of the tank body, so that the sludge can maintain uniformity during precipitation, improve the compaction degree of the sludge inside the conical area. The supernatant collection pipes provided in the middle and above the tank body can quickly collect the clear water, enabling the tank body to quickly complete the sludge thickening work without interruption.

[0040] 3. The present invention is provided with a self-cleaning filter screen above the sludge distribution pipe and a flow-blocking one-way valve inside the sludge distribution pipe. When the sludge distribution pipe is working, by closing the upper part of the sludge distribution pipe with the filter screen, the path for the sludge to flow upward can be reduced, thereby realizing the rapid sedimentation and compression of the sludge inside the tank. And when the tank is used intermittently for sludge compression, the surface of the filter screen can be automatically cleaned by the flow of the sludge water. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 FIG. 7 is a schematic diagram of the overall structure of a sludge thickening device and method for an integrated aeration and sedimentation tank provided by the present invention;

[0042] Figure 2 is Figure 1 a schematic diagram of the sectional structure of the middle part of the tank shown in FIG. 13;

[0043] Figure 3 is Figure 2 a schematic diagram of the structure of the sludge inlet pipe shown in FIG. 19;

[0044] Figure 4 is Figure 2 a schematic diagram of the exploded internal structure of the tank shown in FIG. 25;

[0045] Figure 5 is Figure 4 a schematic diagram of the separated structure of the supernatant collection pipe and the sludge inlet pipe shown in FIG. 31;

[0046] Figure 6 is Figure 5 a schematic diagram of the bottom upward view of the sludge distribution pipe shown in FIG. 37;

[0047] Figure 7 is Figure 6 a schematic diagram of the exploded structure of the sludge distribution pipe and the self-cleaning filter screen shown in FIG. 43;

[0048] Figure 8 is Figure 7 a schematic diagram of the sectional structure of the middle part of the sludge distribution pipe shown in FIG. 49;

[0049] Figure 9 is Figure 8 a schematic diagram of the exploded sectional structure of the tail end of the sludge inlet pipe shown in FIG. 55;

[0050] Figure 10 is Figure 9 a schematic diagram of the enlarged exploded sectional structure of the flow-blocking one-way valve shown in FIG. 61;

[0051] Figure 11 is Figure 7 a schematic diagram of the enlarged exploded sectional structure of the self-cleaning filter screen shown in FIG. 67;

[0052] Figure 12 is Figure 11Schematic diagram of the structural sectional decomposition of the homing annular frame shown.

[0053] Indications in the figure:

[0054] 1. Tank body; 11. Conical area; 12. Sludge discharge electric valve; 13. Sludge discharge pipe; 14. Support column;

[0055] 2. Inlet sludge pipe; 21. Pipeline mixer; 22. Chemical addition pipe; 23. Chemical addition electric valve; 24. Chemical addition flowmeter; 25. Chemical addition pump; 26. Sludge discharge flowmeter; 27. Aerobic zone sludge discharge pump;

[0056] 3. Mud distribution pipe; 31. Shunt box; 32. Mud distribution holes;

[0057] 4. Supernatant collection pipe; 41. Middle pipeline; 42. Upper pipeline; 43. Arc-shaped holes; 44. Intermediate water level electric valve; 45. Clear water pipe; 46. Clear water pump;

[0058] 5. Ultrasonic sludge level gauge; 51. Online turbidity meter;

[0059] 6. Flow-blocking check valve; 61. Valve stem; 62. First hinge rod; 63. Valve disc; 64. Hairspring; 65. Second hinge rod; 66. Homing spring plate; 67. Homing spring; 68. Valve disc limit box; 681. Movable cavity; 682. Return spring; 683. Slide plate; 684. Wedge rod;

[0060] 7. Self-cleaning filter; 71. Fixed ring frame; 72. Cross isolation frame; 73. Fan-shaped filtering area; 74. Fixed filter screen; 75. Fan-shaped sliding area;

[0061] 76. Sliding filter screen; 761. Front end stop bar; 762. Positioning slide bar; 763. Tail end scraper; 764. Homing pull block; 765. Self-cleaning limit groove; 766. Positioning drive hole; 767. Shunt drive pipe; 768. Sludge discharge small holes;

[0062] 77. Homing annular frame; 771. Arc-shaped pulling groove; 772. Homing pull spring; 773. Vertical plate; 774. Through-hole cone. Detailed implementation manners

[0063] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0064] As described in the background art, the sludge discharge concentration in the aerobic tank is low. When the traditional sludge dewatering device discharges sludge, the water content of the sludge and the dewatering effect of the sludge concentration are insufficient.

[0065] To solve this technical problem, the present invention provides a sludge concentration device and method for an integrated aeration and sedimentation tank, which is applied to reducing the water content of the sludge discharged from the aerobic tank, increasing the sludge concentration, and reducing the sludge transportation cost.

[0066] Specifically, please refer to Figures 1 - 12 , the sludge concentration device for the integrated aeration and sedimentation tank specifically includes:

[0067] A tank body 1 with a conical area 11 at the bottom;

[0068] A sludge inlet pipe 2 with a chemical addition pipe 22 connected in parallel at the top, and the bottom end of the sludge inlet pipe 2 penetrates through the center inside the tank body 1;

[0069] A sludge distribution pipe 3 distributed in a cross shape and communicating with the sludge inlet pipe 2;

[0070] A supernatant collection pipe 4 distributed in the upper and middle parts of the tank body 1 and with outlets connected in parallel;

[0071] An ultrasonic sludge level gauge 5 fixed on one side of the top surface of the tank body 1;

[0072] A flow-blocking one-way valve 6 with valve pieces 63 elastically connected on both sides and a return spring piece 66 elastically connected to the end of the valve piece 63, and the flow-blocking one-way valve 6 is fixed in the middle of the bottom end of the sludge inlet pipe 2;

[0073] A self-cleaning filter screen 7 with staggered and overlapping filter surfaces that can be elastically reset, and the self-cleaning filter screen 7 is fixed inside the tank body 1 above the flow-blocking one-way valve 6, and the self-cleaning filter screen 7 is internally connected to the sludge inlet pipe 2;

[0074] The sludge is mixed with chemicals through the chemical addition pipe 22 at the front end of the sludge inlet pipe 2 and then flows into the area above the flow-blocking one-way valve 6. The sludge above the flow-blocking one-way valve 6 flows into the inside of the self-cleaning filter screen 7 to drive it to unfold. The sludge above the flow-blocking one-way valve 6 is blocked and its kinetic energy increases, driving the flow-blocking one-way valve 6 to open. The sludge above the flow-blocking one-way valve 6 flows through its valve port into the inside of the sludge distribution pipe 3. The sludge inside the sludge distribution pipe 3 is evenly dispersed everywhere inside the tank body 1. The sludge inside the tank body 1 is blocked by the self-cleaning filter screen 7 to separate the mud and water.

[0075] The present invention provides an aeration and sedimentation integrated tank sludge concentrating device. By providing a dosing pipe 22 and a pipeline mixer 21 at the front end of the mud inlet pipe 2, the flocculant can be fully mixed with the sludge water in the pipeline, and a mud distribution pipe 3 is provided at the tail end of the mud inlet pipe 2 to evenly distribute the sludge mixed with drugs throughout the tank body 1, thereby improving the dehydration efficiency of the sludge. At the same time, the conical area 11 can be used to increase the concentration of the sludge, and a self-cleaning filter screen 7 is provided above the mud distribution pipe 3 to further filter the sludge and improve the dehydration speed of the sludge.

[0076] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0077] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0078] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0079] Example 1

[0080] Please refer to Figures 1 - 12 A sludge thickening device for an aerated sedimentation integrated tank, wherein the bottom end of the conical area 11 is connected to a sludge discharge electric valve 12, a sludge discharge pipe 13 is connected to the mud outlet below the sludge discharge electric valve 12, and a circular support column 14 is fixed at a position where the bottom end of the tank body 1 is connected to the conical area 11 and is evenly distributed.

[0081] A pipeline mixer 21 is connected to the middle of the front end of the mud inlet pipe 2, the position where the dosing pipe 22 is connected to the mud inlet pipe 2 is located in front of the pipeline mixer 21, the middle of the dosing pipe 22 is connected to a dosing electric valve 23, the end of the dosing pipe 22 away from the mud inlet pipe 2 is connected to a dosing flowmeter 24, the bottom of the dosing flowmeter 24 is connected to a dosing pump 25, the top of the front end of the mud inlet pipe 2 is connected to a mud discharge flowmeter 26, and the end of the mud discharge flowmeter 26 away from the mud inlet pipe 2 is connected to an aerobic zone mud discharge pump 27.

[0082] A dosing pipe 22 is provided at the top of the mud inlet pipe 2 to communicate with it, and a dosing pump 25 and a dosing electric valve 23 are provided to control the dosing amount, so that drugs can be automatically added to the sludge. At the same time, a pipeline mixer 21 is provided in the middle of the mud inlet pipe 2, which can mix the drugs after dosing with the sludge water, so that when the sludge water is discharged, the sludge can quickly settle to complete the mud and water separation.

[0083] Example 2

[0084] The aeration sedimentation integrated tank sludge concentrating device provided in Example 1 is further optimized. Specifically, Figures 1 - 12 A diverter box 31 is provided at one end of the mud distribution pipe 3 connected to the mud inlet pipe 2. The mud distribution pipe 3 is connected in parallel to the bottom end of the mud inlet pipe 2 through the diverter box 31. Mud distribution holes 32 are arranged equidistantly on both sides of the mud distribution pipe 3.

[0085] The supernatant collecting pipe 4 includes a middle pipe 41 and an upper pipe 42. The middle pipe 41 is horizontally penetrated in the middle of the tank body 1, and the upper pipe 42 is horizontally penetrated in the top of the tank body 1. The tops of the middle pipe 41 and the upper pipe 42 are provided with arc-shaped holes 43 arranged equidistantly. The end of the upper pipe 42 away from the tank body 1 is bent to the bottom and connected with the middle pipe 41. The end of the middle pipe 41 away from the tank body 1 is connected to an intermediate water level electric valve 44. The water outlet of the intermediate water level electric valve 44 is connected to a clean water pipe 45, and the middle of the clean water pipe 45 is connected to a clean water pump 46.

[0086] An online turbidity meter 51 is disposed on the outer side of the front of the tank body 1 , and water inlets at upper and lower ends of the online turbidity meter 51 are connected to the upper and lower sides of the tank body 1 .

[0087] The tail end of the mud pipe 2 is provided with a mud distribution pipe 3 which is cross-distributed and has multiple mud distribution holes 32 opened laterally. The mud water mixed with the medicine can be evenly transported to all parts of the tank body 1, so that the sludge can maintain uniformity during sedimentation and improve the compaction degree of the sludge inside the conical area 11. The supernatant collection pipe 4 arranged in the middle and upper part of the tank body 1 can quickly collect the clean water, so that the tank body 1 can quickly complete the sludge concentration work without stopping.

[0088] Example 3

[0089] The aeration sedimentation integrated tank sludge concentrating device provided in Example 1 or 2 is further optimized. Specifically, Figures 1 - 12As shown, the flow-blocking one-way valve 6 includes a valve stem 61, both ends of the valve stem 61 are fixed to the inner wall of the mud inlet pipe 2, symmetric first hinge rods 62 are provided through the bottoms on both sides of the valve stem 61, hairspring 64 is sleeved at both ends of the first hinge rod 62, a valve plate 63 is sleeved outside the first hinge rod 62, the valve plate 63 is elastically connected to the first hinge rod 62 through the hairspring 64, a second hinge rod 65 is provided through the bottom of the end of the valve plate 63 away from the first hinge rod 62, a return spring 67 is sleeved outside the second hinge rod 65, return elastic pieces 66 are hinged at both ends of the second hinge rod 65, the return elastic pieces 66 are elastically connected to the second hinge rod 65 through the return spring 67, symmetric valve plate limit boxes 68 are fixed to both sides of the outer wall of the position where the mud inlet pipe 2 is connected to the flow-blocking one-way valve 6, an activity cavity 681 is opened inside the valve plate limit box 68, a return spring 682 is provided inside the activity cavity 681, a sliding piece 683 is provided at the end of the return spring 682 close to the mud inlet pipe 2, a wedge rod 684 is fixed to the side of the sliding piece 683 facing away from the return spring 682, the wedge rod 684 penetrates inside the mud inlet pipe 2, and the bottom of the outer wall of the return elastic piece 66 abuts against the surface of the wedge rod 684.

[0090] The self-cleaning filter screen 7 includes a fixed ring frame 71, the fixed ring frame 71 is fixed on the inner wall of the tank body 1, a cross isolation frame 72 is connected to the middle of the fixed ring frame 71, and equal-sized fan-shaped filtering areas 73 are formed inside the fixed ring frame 71 through the cross isolation frame 72. Fixed filter nets 74 are arranged on both sides of the symmetric ends of the fan-shaped filtering area 73. Sector-shaped sliding areas 75 are formed on the other two sides of the fan-shaped filtering area 73. A sliding filter net 76 is arranged inside the sector-shaped sliding area 75. One end of the sliding filter net 76 is connected with a front-end blocking strip 761, and the bottom surface of one end of the front-end blocking strip 761 is in sliding contact with the top surface of the sector-shaped sliding area 75. A positioning sliding rod 762 is arranged on the outer side of the sliding filter net 76. One end of the positioning sliding rod 762 is fixed on the side surface of the front-end blocking strip 761, and the other end of the positioning sliding rod 762 faces the center of the fixed ring frame 71. A positioning driving hole 766 is formed at the center of the surface of the fixed ring frame 71 close to the positioning sliding rod 762, and the positioning sliding rod 762 slides inside the positioning driving hole 766. A tail-end scraping plate 763 is fixed at the end of the sliding filter net 76 away from the front-end blocking strip 761. A self-cleaning limiting groove 765 is formed at the position of the cross isolation frame 72 close to the tail-end scraping plate 763. The end of the sliding filter net 76 away from the front-end blocking strip 761 is in sliding contact with the inner side of the self-cleaning limiting groove 765. The side surface of the tail-end scraping plate 763 is in contact with the outer wall of the self-cleaning limiting groove 765. The bottom surface of the tail-end scraping plate 763 is in contact with the top surface of the fixed filter net 74. A return pulling block 764 is fixed at one end of the sliding filter net 76 close to the center of the cross isolation frame 72. A shunt driving pipe 767 communicates with the upper part of the end of the positioning driving hole 766 away from the positioning sliding rod 762, and the other end of the shunt driving pipe 767 communicates with the inside of the mud inlet pipe 2. A sludge discharge small hole 768 is formed at the end of the positioning driving hole 766 away from the positioning sliding rod 762.

[0091] On both sides of the center of the cross isolation frame 72, a return ring frame 77 is fixed. An arc-shaped pulling groove 771 is formed on the side surface of the outer wall of the return ring frame 77. A return pulling spring 772 is arranged inside the arc-shaped pulling groove 771. One end of the return pulling spring 772 is fixed to the arc-shaped pulling groove 771, and the other end of the return pulling spring 772 is fixed to the outer wall of the return pulling block 764. The return pulling block 764 slides inside the arc-shaped pulling groove 771. Vertical plates 773 arranged at equal distances are connected to the side surface of the outer wall of the front-end blocking strip 761. Symmetric through-hole cones 774 are fixed on both sides of the bottom end of the vertical plate 773, and the through-hole cones 774 are inserted into the mud distribution holes 32.

[0092] Above the sludge distribution pipe 3, there is a self-cleaning filter screen 7 and a flow-blocking check valve 6 located inside the sludge distribution pipe 3. When the sludge distribution pipe 3 is working, the upper part of the sludge distribution pipe 3 is closed by the filter screen, reducing the upward flow path of the sludge, thereby realizing the rapid precipitation and compression of the sludge inside the tank body 1. And when the tank body 1 is used intermittently for sludge compression, the surface of the filter screen can be automatically cleaned by the flow of the sludge water.

[0093] Please refer to Figures 1 - 12 , a method for using a sludge thickening device for an integrated aeration and sedimentation tank provided by an embodiment of the present invention. The method for using a sludge thickening device for an integrated aeration and sedimentation tank includes the following steps:

[0094] S1: The sludge with a lower concentration is discharged by the aerobic zone sludge discharge pump 27 to the sludge discharge pipe 13, and the sludge discharge flowmeter 26 records the sludge discharge flow rate;

[0095] S2: The flocculant enters the dosing pipe 22 through the dosing pump 25. The dosing electric valve 23 controls the flow rate, and the dosing flowmeter 24 records the flow rate. The flocculant and the sludge are mixed and fully reacted through the pipeline mixer 21;

[0096] S3: After mixing, the sludge accumulates pressure at the position of the flow-blocking check valve 6 and at the same time flows into the positioning driving hole 766 through the shunt driving pipe 767. The sludge entering the positioning driving hole 766 pushes the positioning slide rod 762 to drive the sliding filter screen 76 to stagger and unfold with the fixed filter screen 74, and the sliding filter screen 76 unfolds to form a circular closure with the fixed filter screen 74;

[0097] S4: After the self-cleaning filter screen 7 unfolds, the sludge pressure passes through the flow-blocking check valve 6 and reaches the sludge distribution pipe 3 through the mud inlet pipe 2, forming a stable flow pattern dispersion at the sludge distribution holes 32;

[0098] S5: The mixed sludge enters the tank body 1. The upward-flowing sludge is blocked by the self-cleaning filter screen 7 to separate the mud and water. The sludge below, under the continuous action of the stable flow pattern and the relative residence time, the chemical flocculation fully takes effect, and at the same time, the mud and water are separated by gravity. The thicker sludge gradually deposits in the conical area 11 of the tank body 1, and the separated water forms supernatant;

[0099] S6: During the continuous mud and water separation process, the ultrasonic sludge level gauge 5 monitors the height of the bottom-deposited sludge, and the adjustable-height turbidimeter monitors the clarity of the effluent;

[0100] S7: Control the dosing and sludge discharge flow rates through the feedback data of the ultrasonic sludge level gauge 5 and the turbidimeter, so as to achieve the required control parameters; after the supernatant meets the clarity requirements, it enters the supernatant collection pipe 4 and is discharged by the clean water pump 46 through the clean water pipe 45. The requirements for clean water discharge are determined by the quality of the clean water;

[0101] S8: Since the volume of the sludge is greatly reduced after thickening, sludge discharge can be intermittent. The height of the sludge layer is monitored by the ultrasonic sludge level gauge 5 and the turbidity meter. When the parameters meet the control requirements, the sludge is further thickened in the conical area 11 of the tank body 1. The discharge of the thickened sludge is controlled by the sludge discharge electric valve 12 of the tank body 1. The thickened sludge is discharged to the sludge storage area through the sludge discharge pipe 13 of the tank body 1. After reaching the storage capacity requirement, it can be transported to the filter press or dryer for treatment;

[0102] S9: The above-mentioned sludge thickening and supernatant drainage can operate continuously for a long time. If the aerobic zone of the aeration sedimentation integrated tank has completed the sludge discharge of the set volume, the chemical dosing and the operation of the sludge discharge pump 27 in the aerobic zone can be ended. After stopping for a period of time, the intermediate water level electric valve 44 can be opened to discharge most of the clear water in the tank body 1. The sludge discharge electric valve 12 of the tank body 1 can be opened for a short time to discharge part of the remaining thickened sludge and lower the liquid level below the sludge distribution pipe 3;

[0103] S10: Before the start of the next round of sludge discharge, due to the inclined plane in the conical area 11 of the tank body 1, the sludge remains anaerobic here and produces relatively light floating sludge. The sludge discharge pump 27 in the aerobic zone can be opened with a large flow rate for a short time. Through the effective distribution of the sludge distribution pipe 3, the floating sludge on the liquid surface below the sludge distribution pipe 3 can be mixed and precipitated again. There may still be a small amount of floating sludge, which can be quickly removed through the arc-shaped structure of the supernatant collection pipe 4. That is, the initially clarified water cannot be directly discharged as the final effluent and needs to enter the high school or the regulation tank. After completion, further operations can be carried out.

[0104] The usage process of a sludge thickening device for an aeration sedimentation integrated tank provided by the present invention is as follows:

[0105] The sludge discharge pump 27 in the aerobic zone pumps the sludge and conveys it into the tank body 1 through the sludge inlet pipe 2. During the conveying process of the front end of the sludge inlet pipe 2, the sludge flowmeter 26 records the sludge flow rate. At the same time, the chemical dosing pump 25 at the bottom of the chemical dosing pipe 22 conveys the flocculant into the sludge inlet pipe 2 to mix the sludge with the chemical. During the conveying process of the chemical, the chemical dosing flowmeter 24 records the chemical dosage. The chemical dosing electric valve 23 is opened during chemical dosing to prevent the sludge from entering the chemical dosing pipe 22. After chemical dosing, the sludge passes through the pipe mixer 21 to fully mix the chemical and the sludge.

[0106] After mixing, the sludge is transported to the top of the flow-blocking one-way valve 6 at the tail end of the mud inlet pipe 2. Since the flow-blocking one-way valve 6 is blocked by the wedge rod 684, the sludge will accumulate at the tail end of the mud inlet pipe 2. At this time, as the internal pressure of the mud inlet pipe 2 increases, the sludge will flow into the positioning drive hole 766 through the diversion drive pipe 767. As the sludge enters the positioning drive hole 766, the pressure of the sludge will push the positioning slide bar 762 to slide outward. At the same time, the positioning slide bar 762 will drive the front end baffle bar 761 and the sliding filter screen 76 connected to its front end to slide. The sliding filter screen 76 will slide by interlacing with the fixed filter screen 74, so that the fan-shaped filter area 73 is completely covered by the filter screen and closed, thereby ensuring the separation of the upper and lower sides of the tank body 1, and at the same time, it is beneficial to improve the filtering and sedimentation effect of the sludge.

[0107] It should be noted that: although there is a mud discharge hole 768 at the tail end of the positioning drive hole 766, since the sludge pressure is greater than the amount of sludge discharged by the mud discharge hole 768, the sludge can maintain the push on the positioning slide bar 762 while the mud discharge hole 768 is discharging mud. At the same time, when the equipment stops using, the sludge will be pulled by the return spring 772 and pushed by the positioning slide bar 762 to be discharged through the mud discharge hole 768, and sludge blockage will not occur.

[0108] During the sliding process of the sliding filter 76, the return pull block 764 in the middle will pull the return tension spring 772 to stretch and store energy.

[0109] During the sliding process of the front end baffle 761, the vertical plate 773 will be driven to slide synchronously, and the sliding of the vertical plate 773 will drive the through hole cone 774 to slide. When the sliding filter 76 is completely closed, the through hole cone 774 will be inserted into the mud distribution hole 32 to achieve the function of blocking the through hole inside the mud distribution hole 32.

[0110] After the self-cleaning filter 7 is fully unfolded, the increased internal pressure of the mud inlet pipe 2 will push the flow-blocking one-way valve 6, so that the downward pressure of the valve plate 63 is greater than the return spring 682 that pushes the wedge rod 684, causing the wedge rod 684 to shrink toward the inside of the active chamber 681, completing the unfolding of the valve plate 63. When the valve plate 63 is unfolded, the sludge enters the mud distribution pipe 3 and is dispersed to various parts of the tank body 1 through the mud distribution holes 32 on both sides of the mud distribution pipe 3. The sludge that passes through the mud distribution holes 32 and follows the water flow to the top of the tank body 1 will be retained under the tank body 1 under the obstruction of the fixed filter screen 74 and the sliding filter screen 76, thereby realizing the function of sludge filtering and concentration.

[0111] When the sludge in the tank body 1 settles into the conical area 11 after a long period of sedimentation and filtration, and there is clean water in the tank body 1, the clean water pump 46 is started to discharge the clean water on the upper side of the tank body 1 through the upper pipe 42, so that the tank body 1 can continue to concentrate the sludge.

[0112] When the tank body 1 is used intermittently, the intermediate water level electric valve 44 is opened and the clean water pump 46 is started, then the clean water in the upper middle part of the tank body 1 can be discharged simultaneously.

[0113] After the equipment is used up, with the shutdown of the equipment, no more sludge will enter through the sludge inlet pipe 2. Then the valve plate 63 of the flow-blocking check valve 6 inside the sludge inlet pipe 2 will rotate upward under the elastic force of the clockwork spring 64. During the rotation of the valve plate 63, the return spring piece 66 at the end of the valve plate 63 will contact the wedge rod 684. At this time, the return spring piece 66 will rotate and store energy for the return spring 67. When the return spring piece 66 rotates away from the wedge rod 684, the return spring piece 66 will rotate to be parallel to the valve plate 63 under the elastic force of the return spring 67, so that the valve plate 63 can block the inside of the sludge inlet pipe 2.

[0114] When the sludge inlet pipe 2 is not in a pressurized state, the sliding filter net 76 will be pulled by the return tension spring 772 connected to the return pull block 764 to rotate, so that the sliding filter net 76 rotates upward above the fixed filter net 74, thus completing the contraction of the self-cleaning filter net 7.

[0115] During the contraction of the self-cleaning filter net 7, the upper and lower surfaces of the sliding filter net 76 will complete the scraping off of the surface sludge through the blockage of the self-cleaning limit groove 765, and the sludge on the top surface of the fixed filter net 74 will be driven by the tail-end scraper 763 to be pushed to one end and fall into the conical area 11 inside the bottom of the tank body 1 when the sliding filter net 76 slides, completing the self-cleaning of the self-cleaning filter net 7.

[0116] When the sliding filter net 76 is pulled back by the return tension spring 772, it drives the positioning slide rod 762 to slide into the positioning drive hole 766. During the sliding of the positioning slide rod 762, it will push the sludge inside the positioning drive hole 766 to move into the sludge discharge small hole 768 at the tail, so that the sludge is discharged through the sludge discharge small hole 768, thus realizing the reset function of the positioning slide rod 762 contracting into the positioning drive hole 766.

[0117] When the equipment is used intermittently, the rental filter net can realize continuous self-cleaning to ensure its own filtering performance.

[0118] In the present invention, in the ratio of the flocculant to the sludge water:

[0119] PAC 20 mg - 30 mg / liter;

[0120] PAM 2 mg - 5 mg / liter.

[0121] In the present invention, the filtering pore diameters of all the filter nets in the self-cleaning filter net are:

[0122] 300 nm - 600 nm;

[0123] In the present invention, if the coagulated sludge resulting from the mixing ratio of the flocculant and the sewage is larger than the filtration aperture of the filter screen, the filter screen can block the upward flow of the sludge, thereby accelerating the sedimentation and concentration of the sludge.

[0124] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0125] Obviously, the embodiments described above are only a part of the embodiments of the present invention, rather than all of them. The preferred embodiments of the present invention are given in the drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements for some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present invention in other related technical fields shall be similarly within the scope of the patent protection of the present invention.

Claims

1. A sludge concentration device for an aeration and sedimentation integrated tank, characterized in that: include: A tank body (1) having a tapered area (11) at the bottom end; A mud inlet pipe (2) with a dosing pipe (22) connected in parallel at the top, and the bottom end of the mud inlet pipe (2) is arranged at the center of the tank body (1); Mud distribution pipes (3) arranged in a cross shape and connected to the mud inlet pipe (2); Supernatant liquid collecting pipes (4) distributed at the upper part and the middle part of the tank body (1) and connected in parallel with the water outlets; An ultrasonic mud level meter (5) fixed to one side of the top surface of the tank body (1); A flow-blocking one-way valve (6) with valve plates (63) elastically connected on both sides and a return spring plate (66) elastically connected at the end of the valve plate (63), wherein the flow-blocking one-way valve (6) is fixed at the middle of the bottom end of the mud inlet pipe (2); The filter surface is provided with staggered and overlapped self-cleaning filter screens (7) capable of elastic reset, the self-cleaning filter screen (7) being fixed inside the tank body (1) and located above the flow-blocking one-way valve (6), and the self-cleaning filter screen (7) being communicated with the interior of the mud inlet pipe (2); The sludge is mixed with chemicals through the dosing pipe (22) at the front end of the sludge inlet pipe (2) and flows into the top of the flow-blocking one-way valve (6). The sludge above the flow-blocking one-way valve (6) flows into the interior of the self-cleaning filter (7) and drives it to expand. The kinetic energy of the sludge above the flow-blocking one-way valve (6) is increased due to the obstruction, driving the flow-blocking one-way valve (6) to open. The sludge above the flow-blocking one-way valve (6) flows into the interior of the sludge distributing pipe (3) through its valve port. The sludge inside the sludge distributing pipe (3) is evenly dispersed throughout the interior of the tank body (1). The sludge inside the tank body (1) is blocked by the self-cleaning filter (7) to separate the mud and water.

2. The aeration sedimentation integrated tank sludge concentrating device according to claim 1 is characterized in that: The bottom end of the conical area (11) is connected to a mud discharge electric valve (12), the mud outlet below the mud discharge electric valve (12) is connected to a mud discharge pipe (13), and the position where the bottom end of the tank body (1) is connected to the conical area (11) is fixed with annular support columns (14) distributed equidistantly.

3. The aeration sedimentation integrated tank sludge concentration device according to claim 2 is characterized in that: A pipeline mixer (21) is connected to the middle of the front end of the mud inlet pipe (2); the position where the dosing pipe (22) is connected to the mud inlet pipe (2) is located in front of the pipeline mixer (21); a dosing electric valve (23) is connected to the middle of the dosing pipe (22); an end of the dosing pipe (22) away from the mud inlet pipe (2) is connected to a dosing flow meter (24); a bottom end of the dosing flow meter (24) is connected to a dosing pump (25); a top of the front end of the mud inlet pipe (2) is connected to a mud discharge flow meter (26); and an end of the mud discharge flow meter (26) away from the mud inlet pipe (2) is connected to an aerobic zone mud discharge pump (27).

4. The aeration sedimentation integrated tank sludge concentrating device according to claim 3 is characterized in that: A flow distribution box (31) is provided at one end of the mud distribution pipe (3) connected to the mud inlet pipe (2); the mud distribution pipe (3) is connected in parallel to the bottom end of the mud inlet pipe (2) via the flow distribution box (31); and mud distribution holes (32) arranged at equal distances are provided on both sides of the mud distribution pipe (3).

5. The aeration sedimentation integrated tank sludge concentration device according to claim 4, characterized in that: The supernatant collecting pipe (4) comprises a middle pipe (41) and an upper pipe (42); the middle pipe (41) is horizontally arranged in the middle of the tank body (1); the upper pipe (42) is horizontally arranged in the top of the tank body (1); the middle pipe (41) and the upper pipe (42) are provided with arc-shaped holes (43) arranged at equal intervals on the top; one end of the upper pipe (42) away from the tank body (1) is bent to the bottom and communicated with the middle pipe (41); one end of the middle pipe (41) away from the tank body (1) is connected to an intermediate water level electric valve (44); the water outlet of the intermediate water level electric valve (44) is connected to a clean water pipe (45); and the middle of the clean water pipe (45) is connected to a clean water pump (46).

6. The aeration sedimentation integrated tank sludge concentrating device according to claim 1, characterized in that: An online turbidity meter (51) is provided on the outside of the front of the tank body (1), and water inlets at the upper and lower ends of the online turbidity meter (51) are connected to the upper and lower sides of the tank body (1).

7. The aeration sedimentation integrated tank sludge concentrating device according to claim 6, characterized in that: The flow-blocking one-way valve (6) comprises a valve stem (61), both ends of which are fixed to the inner wall of the mud inlet pipe (2), symmetrical first hinge rods (62) are inserted through the bottom of both sides of the valve stem (61), spring springs (64) are sleeved on both ends of the first hinge rod (62), the valve plate (63) is sleeved on the outside of the first hinge rod (62), the valve plate (63) is elastically connected to the first hinge rod (62) through the spring spring (64), a second hinge rod (65) is inserted through the bottom of one end of the valve plate (63) away from the first hinge rod (62), a return spring (67) is sleeved on the outside of the second hinge rod (65), return springs (66) are hinged on both ends of the second hinge rod (65), and the return springs (67) are hinged on both ends of the second hinge rod (65). The spring sheet (66) is elastically connected to the second hinge rod (65) via a return spring (67); symmetrical valve plate limit boxes (68) are fixed on both sides of the outer wall of the mud inlet pipe (2) where the flow-blocking one-way valve (6) is connected; an active cavity (681) is provided on the inner side of the valve plate limit box (68); a return spring (682) is provided inside the active cavity (681); a sliding plate (683) is provided at one end of the return spring (682) close to the mud inlet pipe (2); a wedge rod (684) is fixed on a side of the sliding plate (683) facing away from the return spring (682); the wedge rod (684) is penetrated into the mud inlet pipe (2); and the bottom of the outer wall of the return spring (66) abuts against the surface of the wedge rod (684).

8. The aeration-sedimentation integrated tank sludge concentrating device according to claim 7, characterized in that: The self-cleaning filter (7) comprises a fixed ring frame (71), the fixed ring frame (71) is fixed to the inner wall of the tank body (1), a cross isolation frame (72) is connected to the middle of the fixed ring frame (71), and the interior of the fixed ring frame (71) forms a sector filter area (73) of equal size through the cross isolation frame (72), fixed filter screens (74) are provided on both sides of the symmetrical ends of the sector filter area (73), and sector sliding areas (75) are provided on the other two sides of the sector filter area (73), and a sliding passage is provided inside the sector sliding area (75). The filter screen (76) is connected to a front end stop bar (761) at one end of the sliding filter screen (76), and the bottom surface of one end of the front end stop bar (761) slides on the top surface of the fan-shaped sliding area (75). A positioning slide bar (762) is provided on the outside of the sliding filter screen (76), and one end of the positioning slide bar (762) is fixed to the side of the front end stop bar (761), and the other end of the positioning slide bar (762) is opposite to the center of the fixed ring frame (71). A positioning drive is provided at the center of one side of the fixed ring frame (71) close to the positioning slide bar (762). The positioning slide bar (762) slides inside the positioning drive hole (766), the end of the sliding filter (76) away from the front end stop bar (761) is fixed with a rear end scraper (763), the cross isolation frame (72) is provided with a self-cleaning limit groove (765) at a position close to the rear end scraper (763), the end of the sliding filter (76) away from the front end stop bar (761) slides in contact with the inner side of the self-cleaning limit groove (765), and the side of the rear end scraper (763) is in contact with the self-cleaning limit groove (765). The outer wall, the bottom surface of the tail end scraper (763) is attached to the top surface of the fixed filter screen (74), and a return pull block (764) is fixed at one end of the sliding filter screen (76) near the center of the cross isolation frame (72). A shunt drive pipe (767) is connected above the end of the positioning drive hole (766) away from the positioning slide rod (762), and the other end of the shunt drive pipe (767) is connected to the inside of the mud inlet pipe (2). A mud discharge hole (768) is opened at the end of the positioning drive hole (766) away from the positioning slide rod (762).

9. The aeration-sedimentation integrated tank sludge concentrating device according to claim 8, characterized in that: A return annular frame (77) is fixed on both sides of the center of the cross isolation frame (72), and an arc-shaped groove (771) is opened on the side of the outer wall of the return annular frame (77), and a return tension spring (772) is arranged inside the arc-shaped groove (771), one end of the return tension spring (772) is fixed to the arc-shaped groove (771), and the other end of the return tension spring (772) is fixed to the outer wall of the return pull block (764), and the return pull block (764) slides on the inside of the arc-shaped groove (771), and the side of the outer wall of the front end stop bar (761) is connected to the vertical plates (773) arranged at equal distances, and symmetrical through-hole cones (774) are fixed on both sides of the bottom end of the vertical plates (773), and the through-hole cones (774) are inserted into the mud distribution hole (32).

10. The method for using the aeration sedimentation integrated tank sludge concentrating device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: The aerobic zone sludge pump (27) discharges low-concentration sludge to the sludge discharge pipe (13), and the sludge discharge flow meter (26) records the sludge discharge flow; S2: The flocculant enters the dosing pipe (22) through the dosing pump (25), the dosing electric valve (23) controls the flow rate, and the dosing flow meter (24) records the flow rate. The flocculant and the sludge are mixed and reacted fully through the pipeline mixer (21); S3: After mixing, the sludge accumulates pressure at the position of the flow blocking one-way valve (6) and simultaneously flows into the interior of the positioning drive hole (766) through the diversion drive pipe (767). The sludge entering the interior of the positioning drive hole (766) pushes the positioning slide bar (762) to drive the sliding filter screen (76) and the fixed filter screen (74) to unfold alternately. The sliding filter screen (76) unfolds and forms a ring-shaped closure with the fixed filter screen (74); S4: After the self-cleaning filter (7) is unfolded, the sludge pressure rushes through the flow-blocking check valve (6) and reaches the sludge distribution pipe (3) through the sludge inlet pipe (2), and forms a stable flow dispersion in the sludge distribution hole (32); S5: The mixed sludge enters the tank body (1), and the upward flowing sludge is blocked by the self-cleaning filter (7) to separate the mud and water. Under the continuous action of the stable flow state and relative residence time, the chemical flocculation of the sludge below fully takes effect, and the mud and water are separated by gravity. The thicker sludge gradually settles in the conical area (11) of the tank body (1), and the water forms a supernatant after separation; S6: During the continuous mud-water separation process, the ultrasonic mud level meter (5) monitors the height of the bottom sediment sludge, and the height-adjustable turbidity meter monitors the clarity of the effluent water; S7: Control the dosing and mud discharge flow rate through the feedback data of the ultrasonic mud level meter (5) and the turbidity meter to achieve the required control parameters; after the supernatant reaches the clarity requirement, it enters the supernatant collection pipe (4) and is discharged through the clean water pipe (45) by the clean water pump (46). The clean water discharge requirement is determined by the clean water quality; S8: Since the volume of the sludge is greatly reduced after concentration, it only needs to be discharged intermittently. The height of the sludge layer is monitored by an ultrasonic mud level meter (5) and a turbidity meter to meet the control parameters. The sludge is further concentrated in the conical area (11) of the tank (1). The discharge of the concentrated sludge is controlled by the mud discharge electric valve (12) of the tank (1). The concentrated sludge is discharged to the mud storage area through the mud discharge pipe (13) of the tank (1). After reaching the storage capacity requirement, it can be transported to the filter press or dryer for treatment; S9: The above-mentioned sludge concentration and supernatant drainage can be operated continuously and for a long time. If the aerobic zone of the aeration sedimentation integrated tank has completed the sludge discharge set volume, the operation of the dosing and aerobic zone sludge pump (27) can be stopped. After stopping for a period of time, the intermediate water level electric valve (44) can be opened to discharge most of the clean water in the tank (1). The tank (1) sludge discharge electric valve (12) can be opened for a short time to discharge part of the remaining concentrated sludge and reduce the liquid level to below the sludge distribution pipe (3); S10: Before the next round of sludge discharge begins, due to the presence of an inclined surface in the conical area (11) of the tank body (1), the sludge remains there in an anaerobic state and produces lighter floating sludge. The aerobic area sludge discharge pump (27) can be turned on for a short period of time to discharge sludge at a large flow rate. The sludge is effectively distributed through the sludge distribution pipe (3), and the floating sludge on the liquid surface under the sludge distribution pipe (3) can be mixed and precipitated again. A small amount of floating sludge will still exist, and the floating sludge can be quickly removed through the arc-shaped structure of the supernatant collection pipe (4). That is, the initial clear liquid cannot be directly discharged as the final effluent, but needs to enter the college or regulating tank. After completion, further operations can be performed.

Images