Sewage sludge advanced treatment device

Abstract

The invention discloses a sewage sludge advanced treatment device, which belongs to the technical field of sludge treatment, and comprises a flocculation basin and a dehydration device, a concentration adjusting tank is arranged between the flocculation basin and the dehydration device, the inside of the tank is divided into a high-concentration area and a low-concentration area through a filter plate, the high-concentration area is provided with a first liquid inlet pipe, and the low-concentration area is provided with a second liquid inlet pipe; flowing into a dehydration device through a mixing pump; the filter plate is controlled by a driving mechanism to move so as to change the volume of the high-concentration area, and a first concentration detector is mounted on the first liquid inlet pipe and is used for moving the filter plate to reduce the volume of the high-concentration area when the first concentration detector detects that the concentration is lower than a threshold value; a control valve is installed on the second liquid inlet pipe and used for opening the control valve when the first concentration detector detects that the concentration is larger than the threshold value. The concentration regulating tank is arranged between the flocculation tank and the dehydration device to regulate the concentration of the sludge, so that the concentration of the sludge input into the dehydration device is stable, and the qualified rate of sludge caking is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, and in particular to a sewage sludge deep treatment device. Background Art

[0002] In the process of industrial sludge treatment, it generally includes: 1. Sludge conditioning. Sludge conditioning is a pretreatment step for deep dehydration, which aims to change the sludge characteristics, reduce the sludge specific resistance, and improve the dehydration rate. Flocculants are used to flocculate the dispersed small sludge particles into large particles to improve the sedimentation performance of the sludge; 2. Sludge dehydration. Sludge dehydration is the core step of deep treatment, which aims to further reduce the water content of the sludge. Traditional sludge dehydration equipment mainly uses technologies such as centrifugal dehydration, belt filter press dehydration and diaphragm plate and frame filter press; 3. Mud block treatment. The sludge after dehydration forms mud blocks, and subsequent disposal methods include incineration, landfill and composting. After the above steps, deep treatment of sludge reduction, stabilization and harmless treatment is achieved.

[0003] However, before dehydration, traditional sludge cannot ensure that the concentration of sludge input to the dehydration equipment remains stable. The dehydration equipment is a complex equipment composed of multiple components. The instability of the sludge concentration will also affect the final dehydration effect. Taking the belt filter press dehydration equipment as an example, the belt filter press dehydration equipment mainly uses the extrusion force between the press roller and the filter belt to squeeze and filter out the water in the mud to complete the dehydration operation. The parameter that affects the extrusion effect is the gap between the press roller and the filter belt. If the mud concentration is unstable, the conventionally set parameters will not be able to ensure that the dehydrated sludge meets the subsequent treatment requirements, or cause damage to the equipment itself. For example, if the sludge concentration is too high, the gap between the press roller and the filter belt will be small, causing the extrusion limit to be exceeded. If the sludge concentration is too low, the gap between the press roller and the filter belt will be large, resulting in insufficient dehydration. Therefore, the existing sludge deep treatment device still has certain defects when used. Summary of the invention

[0004] The present invention aims to solve the problem that the above-mentioned traditional sludge cannot ensure the stability of the incoming sludge concentration before dehydration, and to provide a sewage sludge deep treatment device, which has the advantages of maintaining the stability of the sludge concentration before dehydration and ensuring that the dehydration effect meets the standards.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A sewage sludge deep treatment device comprises a flocculation tank and a dehydration device, wherein a concentration regulating tank is installed between the flocculation tank and the dehydration device, a filter plate is arranged inside the concentration regulating tank to divide the tank into an upper and lower area, the area located on the upper layer of the filter plate is a high concentration area, and the area located on the lower layer of the filter plate is a low concentration area, a first liquid inlet pipe is installed in the high concentration area, and a second liquid inlet pipe is installed in the low concentration area, the first liquid inlet pipe and the second liquid inlet pipe are connected to two inlets of a mixing pump, and the outlet of the mixing pump is connected to the inlet of the dehydration device through a mud outlet pipe;

[0007] The filter plate is controlled to move by a driving mechanism to change the volume of the high-concentration area. A first concentration detector is installed on the first liquid inlet pipe, which is used to move the filter plate to reduce the volume of the high-concentration area when the first concentration detector detects that the concentration is lower than a threshold value;

[0008] A control valve is installed on the second liquid inlet pipe, and is used to open the control valve when the first concentration detector detects that the concentration is greater than a threshold value;

[0009] The flocculation tank is provided with a sludge feed pipe and an overflow pipe, wherein the sludge feed pipe is communicated with the high concentration area, and the overflow pipe is communicated with the low concentration area.

[0010] Preferably, the driving mechanism includes a plurality of traction ropes and a winch assembly, one end of each traction rope is connected to the filter plate, and the other end is connected to the winch assembly via a pulley, and the winch assembly retracts and releases the traction rope to control the up and down movement of the filter plate to change the volume of the high concentration area.

[0011] Preferably, an adjustable liquid inlet is installed on the first liquid inlet pipe, and the adjustable liquid inlet is fixed on the filter plate and moves with the filter plate.

[0012] Preferably, the adjustable liquid inlet includes a lifting tube arranged on the inner wall of the first liquid inlet pipe, a port is installed on the top end of the lifting tube, a sliding sealing ring is installed on the bottom end, the port is fixed on the filter plate, and the lifting tube can move up and down on the inner wall of the first liquid inlet pipe.

[0013] Preferably, the filter plate is arranged to be inclined toward the adjustable liquid inlet, and maintains the inclined state when the filter plate moves up and down.

[0014] Preferably, the driving mechanism includes an electric push rod and a sliding track. One end of the filter plate is rotatably mounted on the pool wall of the concentration adjustment tank through a rotating shaft, and the other end is movably connected to the sliding track, so that when the electric push rod pushes the filter plate to swing around the rotating shaft, the free end of the filter plate can move on the sliding track.

[0015] Preferably, the sliding track is in an arc-shaped structure, and the center of the arc coincides with the rotation axis. A filling is provided between the sliding track and the pool wall of the concentration regulating pool so that the high-concentration area and the low-concentration area are connected only through the filter plate.

[0016] Preferably, a fixed liquid inlet is installed on the first liquid inlet pipe, and the fixed liquid inlet is arranged on the pool wall in the high concentration area close to the rotating axis, and the filter plate is inclined toward the fixed liquid inlet when not rotating.

[0017] Preferably, a second concentration detector is installed at one end of the mud discharge pipe close to the mixing pump, and a mud discharge nozzle is set at the end connected to the dehydration device. The mud discharge nozzle includes an adjustable nozzle, which is used to control the mud discharge nozzle to spray mud in a concentrated manner when the second concentration detector detects that the concentration is lower than a threshold value, and control the mud discharge nozzle to spray mud in a dispersed manner when the second concentration detector detects that the concentration is higher than the threshold value.

[0018] Preferably, two symmetrically arranged movable wall panels are installed on the inner wall of the mud discharge nozzle, and the spacing of the movable wall panels is adjusted to control the concentrated spraying or dispersed spraying of the mud. The movable wall panels are connected to a telescopic rod for controlling the spacing, and the telescopic rod is connected to a screw rod through a connecting plate, and the screw rod is driven to rotate by a motor to control the extension and retraction of the telescopic rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The concentration regulating tank is used to maintain the stability of the sludge concentration entering the dehydration device, so that the sludge dehydration effect is good and the load of the dehydration device is small. The concentration regulating tank is divided into upper and lower high-concentration areas and low-concentration areas by filter plates. Due to the characteristics of the filter plates filtering sludge, reducing the volume of the high-concentration area can reduce the moisture content in the sludge, thereby achieving the effect of increasing the sludge concentration. The dilution of the sludge in the low-concentration area can also reduce the sludge concentration. Therefore, this device uses a mixing pump as a power device for feeding the sludge in the concentration regulating tank. When the sludge concentration needs to be adjusted, the liquid inlet pipe can be flexibly controlled to ensure the stability of the sludge concentration input to the dehydration device.

[0021] 2. By installing a second concentration detector on the mud outlet pipe of the mixing pump, the concentration of the mixed sludge can be monitored to ensure the accuracy of the sludge concentration. By using an adjustable mud discharge nozzle to send the sludge into the dewatering device, the error can be reduced. Since the present invention uses the movement of the filter plate to adjust the concentration, the mechanical drive has a certain working time. Therefore, during the sludge concentration adjustment process and after the adjustment is completed, there will be a certain amount of sludge with unstable concentration in the mud outlet pipe. Therefore, by using the mud discharge nozzle to perform centralized or decentralized feeding actions, the sludge concentration adjustment time can be compensated and the error can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the sludge deep treatment device of the present invention.

[0023] Figure 2 It is a schematic diagram of the internal structure of the concentration regulating tank of the present invention.

[0024] Figure 3 Schematic diagram of the structure of the adjustable liquid inlet in Example 1 of the present invention.

[0025] Figure 4 Schematic diagram of the driving mechanism structure in Example 2 of the present invention.

[0026] Figure 5 This is a schematic diagram of the swinging state of the filter plate in Example 2 of the present invention.

[0027] Figure 6 It is a schematic diagram of the internal structure of the mud discharge nozzle of the present invention.

[0028] Figure 7 It is a schematic structural diagram of the present invention for adjusting the spacing between movable wall panels by using a lead screw.

[0029] In the figure: 1, flocculation tank, 2, concentration regulating tank, 3, mixing pump, 4, mud outlet pipe, 5, mud discharge nozzle, 6, dehydration device, 7, mud block crushing device, 8, filter plate, 9, high concentration area, 10, low concentration area, 11, traction rope, 12, pulley, 13, winch assembly, 14, overflow pipe, 15, water level detector, 16, sludge feed pipe, 17, first liquid inlet pipe, 18, second liquid inlet pipe, 19, adjustable liquid inlet, 20, first concentration detector, 21, control valve, 22, second concentration detector, 23, lifting pipe, 24, port, 25, sliding sealing ring, 26, sliding track, 27, rotating shaft, 28, electric push rod, 29, fixed liquid inlet, 30, moving wall panel, 31, telescopic rod, 32, connecting plate, 33, screw rod, 34, driven gear, 35, driving gear, 36, motor. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] like Figure 1As shown, a sewage sludge deep treatment device is disclosed, including a flocculation tank 1, a dewatering device 6 and a mud block crushing device 7, and a concentration regulating tank 2 is installed between the flocculation tank 1 and the dewatering device 6. In the process of sludge deep treatment, the sewage sludge first enters the flocculation tank 1 for characteristic conditioning, so that the dispersed small sludge particles are flocculated and aggregated to form large particles, thereby improving the sedimentation performance of the sludge. The sewage sludge mixture is stored in the flocculation tank 1, and the sludge is used to refer to these mixtures below, and the sludge after dewatering is represented by sludge. Before the sludge enters the dewatering device 6, it first enters the concentration regulating tank 2 as a buffer. The concentration regulating tank 2 can adjust the concentration of the sludge to maintain the stability of the sludge concentration entering the dewatering device 6. The stable mud concentration will not cause pressure on the dewatering device 6 or cause unstable sludge production. There are various types of traditional dewatering devices 6. The present invention is as follows Figure 1 As shown, a belt filter press is used as the dewatering device 6 in this device. The belt filter press comprises a plurality of pressing rollers and two layers of filter belts. The sludge is fed into the spaces between the filter belts and is carried by the filter belts through the spaces between the pressing rollers. The sewage in the sludge is squeezed out by the pressing rollers. Finally, the remaining sludge falls off the filter belts and enters the sludge block crushing device 7 for crushing. The sludge fragments can be subsequently incinerated or buried. This process is the complete process of sludge deep treatment.

[0032] The function of the concentration regulating tank 2 is to maintain the stability of the sludge concentration and also to ensure the qualified rate of the sludge after dehydration by the dehydration device 6. Therefore, the principle of how the concentration regulating tank 2 performs concentration regulation is described in detail below.

[0033] like Figure 2 As shown, a filter plate 8 is arranged inside the concentration regulating tank 2 to divide the tank into two upper and lower areas. The area located on the upper layer of the filter plate 8 is the high-concentration area 9, and the area located on the lower layer of the filter plate 8 is the low-concentration area 10. The high-concentration area 9 is equipped with a first liquid inlet pipe 17, and the low-concentration area 10 is equipped with a second liquid inlet pipe 18. The first liquid inlet pipe 17 and the second liquid inlet pipe 18 are connected to the two inlets of the mixing pump 3, and the outlet of the mixing pump 3 is connected to the inlet of the dehydration device 6 through the mud outlet pipe 4.

[0034] The filter plate 8 can filter the sludge in the mud, so the filter plate 8 in the concentration regulating tank 2 can prevent the sludge in the mud from flowing from the high concentration area 9 into the low concentration area 10, and always ensure that the area located on the upper layer of the filter plate 8 is the high concentration area 9, and the area on the lower layer is the low concentration area 10. The filter plate 8 can be moved by a driving mechanism, so when the filter plate 8 moves upward, the volume of the high concentration area 9 will be compressed, and the solid in the high concentration area 9 cannot pass through the filter plate 8, and the liquid can pass through the filter plate 8. Therefore, when the volume of the high concentration area 9 decreases, the sludge content inside it remains unchanged, while the liquid content decreases, thereby achieving the effect of increasing the sludge concentration in the mud. In order to ensure that the mud after adjusting the concentration can be sent to the dehydration device 6, a mixing pump 3 is selected here as the mud conveying equipment. The mixing pump 3 has two liquid inlets and one liquid outlet. The liquid inlets are respectively connected to the first liquid inlet pipe 17 and the second liquid inlet pipe 18. The two liquid inlet pipes 17 cooperate with the filter plate 8 to adjust the mud concentration.

[0035] The filter plate 8 is controlled to move by the driving mechanism to change the volume of the high concentration area 9. The first concentration detector 20 is installed on the first liquid inlet pipe 17, which is used to move the filter plate 8 to reduce the volume of the high concentration area 9 when the first concentration detector 20 detects that the concentration is lower than the threshold value;

[0036] A control valve 21 is installed on the second liquid inlet pipe 18, and is used to open the control valve 21 when the first concentration detector 20 detects that the concentration is greater than a threshold value.

[0037] The following describes in detail how the concentration adjustment tank 2 works using three concentration states of mud.

[0038] 1. When the mud concentration in the high-concentration area 9 meets the dehydration requirement, the control valve 21 does not need to be opened, and the mud only enters the mixing pump 3 through the first liquid inlet pipe 17 and is finally sent to the dehydration device 6;

[0039] Second, the mud concentration in the high-concentration area 9 is lower than the dehydration requirement. At this time, the control valve 21 also does not need to be opened. The mud still only enters the mixing pump 3 through the first liquid inlet pipe 17 and is finally sent to the dehydration device 6. However, when only the first liquid inlet pipe 17 sucks the mud, it is necessary to use the driving mechanism to control the filter plate 8 to reduce the volume in the high-concentration area 9 and concentrate the mud to meet the dehydration requirement.

[0040] 3. The mud concentration in the high-concentration area 9 is higher than the dehydration demand. It is worth noting that, in this case, the conventional method of increasing the volume of the high-concentration area 9 cannot be used to reduce the mud concentration. This is because the concentration adjusting tank 2 continuously injects mud through the flocculation tank 1, and the concentration adjusting tank 2 is not a static environment. Therefore, the mud concentration may not be reduced by simply increasing the volume of the high-concentration area 9. Instead, the control valve 21 is opened so that the second liquid inlet pipe 18 can draw the liquid from the low-concentration area 10 into the mixing pump 3, mix it with the mud in the high-concentration area 9, and dilute the high-concentration mud to meet the dehydration demand.

[0041] The flocculation tank 1 is provided with a sludge feed pipe 16 and an overflow pipe 14. The sludge feed pipe 16 is connected to the high concentration area 9, and the overflow pipe 14 is connected to the low concentration area 10. As mentioned above, the concentration regulating tank 2 is not a static environment. The sludge feed pipe 16 is used to continuously feed the sludge in the flocculation tank 1 into the concentration regulating tank 2, and the excess liquid after filtration in the low concentration area 10 is discharged back to the flocculation tank 1 along the overflow pipe 14, so that the concentration regulating tank 2 and the flocculation tank 1 form a cycle. A water level detector 15 is also installed in the high concentration area 9 to timely detect the liquid level in the concentration regulating tank 2 and give an alarm in time when a low liquid level occurs.

[0042] Since the mud concentration adjustment in the concentration adjustment tank 2 is a mechanical adjustment process, the adjustment takes a certain amount of time. During this period of adjustment, if the mud that does not meet the requirements enters the dehydration device 6, it will also affect the operation of the dehydration device 6. Figure 2 As shown, a second concentration detector 22 is installed at one end of the mud discharge pipe 4 close to the mixing pump 3, and a mud discharge nozzle 5 is arranged at the end connected to the dehydration device 6. The mud discharge nozzle 5 includes an adjustable nozzle, which is used to control the mud discharge nozzle 5 to spray mud in a concentrated manner when the second concentration detector 22 detects that the concentration is lower than a threshold value, and control the mud discharge nozzle 5 to spray mud in a dispersed manner when the second concentration detector 22 detects that the concentration is higher than the threshold value.

[0043] The second concentration detector 22 can be used to detect whether the concentration of the mud discharged by the mixing pump 3 meets the standard. In the process of concentration adjustment, the mud that does not meet the demand will be accumulated in the mud outlet pipe 4. If the mud outlet pipe 4 is longer, more unqualified mud will be accumulated. Therefore, the adjustable mud discharge nozzle 5 can be used to disperse the mud when the mud concentration is high to reduce the thickness of the mud layer on the filter belt. When the mud concentration is low, the mud is concentrated to increase the thickness of the mud layer on the filter belt. The principle of detecting the concentration by the first concentration detector 20 and the second concentration detector 22 belongs to the prior art. For example, devices such as ultrasonic concentration sensors, optical concentration sensors or nuclear concentration meters can achieve the purpose of detecting concentration, so the principle will not be repeated.

[0044] like Figure 6 and Figure 7 As shown, two symmetrically arranged movable wall panels 30 are installed on the inner wall of the mud discharge nozzle 5. The spacing of the movable wall panels 30 is adjusted to control the concentrated spraying of mud or the dispersed spraying of mud. The movable wall panels 30 are connected to a telescopic rod 31 for controlling the spacing. The telescopic rod 31 is connected to a screw rod 33 through a connecting plate 32. The screw rod 33 is driven by a motor 36 to rotate and control the extension and retraction of the telescopic rod 31.

[0045] The principle that the mud discharge nozzle 5 can adjust the dispersion and concentration of the sprayed mud is to control the dispersion degree of the mud sprayed by adjusting the spacing of the movable wall plate 30. The process of the movable wall plate 30 moving in the mud discharge nozzle 5 is the process of adjusting the nozzle width, and the movable wall plate 30 is moved by the telescopic rod 31 outside the mud discharge nozzle 5. One end of the telescopic rod 31 passes through the mud discharge nozzle 5 to connect the movable wall plate 30, and the other end is fixed on the connecting plate 32. The connecting plate 32 passes through the screw rod 33. As the screw rod 33 rotates, the two connecting plates 32 can approach and move away. The rotation of the screw rod 33 is through the gear tradition. The outer wall of the screw rod 33 is sleeved with the driven gear 34, and the driven gear 34 is meshed with the driving gear 35. The driving gear 35 is then driven to rotate by the motor 36. In this way, after receiving the signal from the second concentration detector 22, the motor 36 can immediately control the screw rod 33 to rotate forward or reverse.

[0046] As can be seen from the above, the key to the concentration adjustment tank 2 lies in the movement control of the filter plate 8. Two embodiments are used below to describe in detail how the driving mechanism drives the filter plate 8.

[0047] Example 1

[0048] like Figure 2 As shown, the driving mechanism includes a plurality of traction ropes 11 and a winch assembly 13. One end of each traction rope 11 is connected to the filter plate 8, and the other end is connected to the winch assembly 13 through a pulley 12. The winch assembly 13 retracts and releases the traction rope 11 to control the filter plate 8 to move up and down to change the volume of the high-concentration area 9. The lifting and lowering of the filter plate 8 is controlled by the retraction and release of the traction rope 11. The structure is simple and the response is fast. The winch assembly 13 is used to retract and release the traction rope 11 and is installed above the concentration regulating tank 2. The traction rope 11 is vertically connected to the filter plate 8 downward, and the pulley 12 can change the direction of the traction rope 11 so that it can be connected to the winch assembly 13. The traction rope 11 is used to lift the filter plate 8. Since the filter plate 8 is a translational movement process, the volume of the high-concentration area 9 can be quickly reduced.

[0049] In order to adapt to the up and down movement of the filter plate 8 without affecting the first liquid inlet pipe 17 to extract the mud in the high concentration area 9, an adjustable liquid inlet 19 is installed on the first liquid inlet pipe 17. The adjustable liquid inlet 19 is fixed on the filter plate 8 and moves with the filter plate 8. Figure 3As shown, the adjustable liquid inlet 19 includes a lifting tube 23 arranged on the inner wall of the first liquid inlet pipe 17, a port 24 is installed at the top end of the lifting tube 23, and a sliding sealing ring 25 is installed at the bottom end. The port 24 is fixed on the filter plate 8. The lifting tube 23 can move up and down on the inner wall of the first liquid inlet pipe 17. The port 24 of the lifting tube 23 is fixed on the filter plate 8. As the filter plate 8 rises, the port 24 will also pull the lifting tube 23 out of the first liquid inlet pipe 17, and the sliding sealing ring 25 can prevent the liquid in the low concentration area 10 from entering along the gap between the lifting tube 23 and the first liquid inlet pipe 17.

[0050] The filter plate 8 is tilted toward the adjustable liquid inlet 19 and maintains the tilted state when the filter plate 8 moves up and down. The tilted filter plate 8 can allow the sludge in the slurry to gather at the adjustable liquid inlet 19 as much as possible, which is convenient for extraction.

[0051] Example 2

[0052] Different from the driving mechanism of Example 1, the driving mechanism of this embodiment does not need to control the filter plate 8 to move significantly, and the driving of the filter plate 8 is more stable than that of Example 1, but it cannot achieve the same effect of quickly reducing the volume of the high-concentration area 9 as in Example 1. Different driving mechanisms have their own advantages and disadvantages and can meet different usage requirements.

[0053] like Figure 4 As shown, the driving mechanism includes an electric push rod 28 and a sliding track 26. One end of the filter plate 8 is rotatably mounted on the pool wall of the concentration adjustment pool 2 through a rotating shaft 27, and the other end is movably connected to the sliding track 26, so that when the electric push rod 28 pushes the filter plate 8 to swing around the rotating shaft 27, the free end of the filter plate 8 can move on the sliding track 26. The filter plate 8 uses a swinging method to reduce the volume of the high-concentration area 9, and the electric push rod 28 is used as a driving member, and the sliding track 26 maintains the stability of the swing of the filter plate 8. Figure 4 is a schematic diagram of the state of the filter plate 8 before it swings, and Figure 5 It is a schematic diagram of the state where the filter plate 8 swings to the limit. According to the two figures, it can be seen that because one end of the rotating shaft 27 of the filter plate 8 is not displaced from the pool wall of the concentration adjusting pool 2, the overall rate of reducing the volume of the high concentration area 9 is low, but compared with the lifting filter plate 8, the movement is more stable.

[0054] In order to avoid the connection of sludge between the high-concentration area 9 and the low-concentration area 10, the sliding track 26 is in an arc structure, and the center of the arc coincides with the rotation axis 27. A filling is arranged between the sliding track 26 and the pool wall of the concentration adjustment pool 2, so that the high-concentration area 9 and the low-concentration area 10 are connected only through the filter plate 8. When the filter plate 8 swings, the free end is always slidably connected to the sliding track 26, so the high-concentration area 9 and the low-concentration area 10 can only be connected by liquid through the filter plate 8, and the sludge is effectively blocked.

[0055] Different from the first embodiment, since the filter plate 8 does not need to move up and down, the liquid inlet is also different, such as Figure 4 As shown, a fixed liquid inlet 29 is installed on the first liquid inlet pipe 17, and the fixed liquid inlet 29 is arranged on the pool wall of the high concentration area 9 close to the rotating shaft 27. The filter plate 8 is tilted toward the fixed liquid inlet 29 when not rotating. The installation position of the fixed liquid inlet 29 is fixed, and even if the filter plate 8 swings, it will not affect the normal extraction of mud, and the inclined filter plate 8 is also to allow the sludge in the mud to gather as much as possible at the fixed liquid inlet 29 for easy extraction.

[0056] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sewage sludge deep treatment device, comprising a flocculation tank (1), a dehydration device (6) and a mud block crushing device (7), characterized in that: A concentration regulating tank (2) is installed between the flocculation tank (1) and the dehydration device (6). A filter plate (8) is arranged inside the concentration regulating tank (2) to divide the tank into two upper and lower regions. The region located on the upper layer of the filter plate (8) is a high-concentration region (9), and the region located on the lower layer of the filter plate (8) is a low-concentration region (10). The high-concentration region (9) is installed with a first liquid inlet pipe (17), and the low-concentration region (10) is installed with a second liquid inlet pipe (18). The first liquid inlet pipe (17) and the second liquid inlet pipe (18) are connected to two inlets of a mixing pump (3), and the outlet of the mixing pump (3) is connected to the inlet of the dehydration device (6) through a mud outlet pipe (4). The filter plate (8) is controlled to move by a driving mechanism to change the volume of the high-concentration area (9); a first concentration detector (20) is installed on the first liquid inlet pipe (17) for moving the filter plate (8) to reduce the volume of the high-concentration area (9) when the first concentration detector (20) detects that the concentration is lower than a threshold value; A control valve (21) is installed on the second liquid inlet pipe (18) and is used to open the control valve (21) when the first concentration detector (20) detects that the concentration is greater than a threshold value; The flocculation tank (1) is provided with a sludge feed pipe (16) and an overflow pipe (14); the sludge feed pipe (16) is connected to the high concentration area (9), and the overflow pipe (14) is connected to the low concentration area (10).

2. A sewage sludge deep treatment device according to claim 1, characterized in that: The driving mechanism comprises a plurality of traction ropes (11) and a winch assembly (13); one end of each traction rope (11) is connected to the filter plate (8), and the other end is connected to the winch assembly (13) via a pulley (12); the winch assembly (13) retracts and releases the traction rope (11) to control the filter plate (8) to move up and down, thereby changing the volume of the high-concentration area (9).

3. A sewage sludge deep treatment device according to claim 2, characterized in that: An adjustable liquid inlet (19) is installed on the first liquid inlet pipe (17); the adjustable liquid inlet (19) is fixed on the filter plate (8) and moves with the filter plate (8).

4. A sewage sludge deep treatment device according to claim 3, characterized in that: The adjustable liquid inlet (19) comprises a lifting pipe (23) arranged on the inner wall of the first liquid inlet pipe (17), a port (24) being installed at the top end of the lifting pipe (23), and a sliding sealing ring (25) being installed at the bottom end, the port (24) being fixed on the filter plate (8), and the lifting pipe (23) being movable up and down on the inner wall of the first liquid inlet pipe (17).

5. A sewage sludge deep treatment device according to claim 4, characterized in that: The filter plate (8) is arranged to be inclined toward the adjustable liquid inlet (19), and maintains the inclined state when the filter plate (8) moves up and down.

6. The sewage sludge deep treatment device according to claim 1, characterized in that: The driving mechanism comprises an electric push rod (28) and a sliding track (26); one end of the filter plate (8) is rotatably mounted on the pool wall of the concentration regulating pool (2) via a rotating shaft (27); the other end is movably connected to the sliding track (26) so that when the electric push rod (28) pushes the filter plate (8) to swing around the rotating shaft (27), the free end of the filter plate (8) can move on the sliding track (26).

7. The sewage sludge deep treatment device according to claim 6, characterized in that: The sliding track (26) is in an arc-shaped structure, and the center of the arc coincides with the rotation axis (27). A filling is provided between the sliding track (26) and the wall of the concentration adjustment pool (2), so that the high-concentration area (9) and the low-concentration area (10) are connected only through the filter plate (8).

8. The sewage sludge deep treatment device according to claim 6, characterized in that: A fixed liquid inlet (29) is installed on the first liquid inlet pipe (17), and the fixed liquid inlet (29) is arranged on the pool wall of the high concentration area (9) close to the rotating shaft (27). The filter plate (8) is inclined toward the fixed liquid inlet (29) when not rotating.

9. The sewage sludge deep treatment device according to claim 1, characterized in that: A second concentration detector (22) is installed at one end of the mud discharge pipe (4) close to the mixing pump (3), and a mud discharge nozzle (5) is arranged at one end connected to the dehydration device (6). The mud discharge nozzle (5) comprises an adjustable nozzle, which is used to control the mud discharge nozzle (5) to spray mud in a concentrated manner when the second concentration detector (22) detects that the concentration is lower than a threshold value, and to control the mud discharge nozzle (5) to spray mud in a dispersed manner when the second concentration detector (22) detects that the concentration is higher than the threshold value.

10. The sewage sludge deep treatment device according to claim 9, characterized in that: The inner wall of the mud discharge nozzle (5) is provided with two symmetrically arranged movable wall plates (30). The distance between the movable wall plates (30) is adjusted to control the concentrated spraying of mud or the dispersed spraying of mud. The movable wall plates (30) are connected to a telescopic rod (31) for controlling the distance. The telescopic rod (31) is connected to a screw rod (33) via a connecting plate (32). The screw rod (33) is driven by a motor (36) to rotate and control the telescopic movement of the telescopic rod (31).

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