Sludge storage tank

Abstract

The utility model discloses a sludge storage tank, the sludge storage tank comprises a tank body (100), a muddy water input unit (200) and a supernatant discharge unit (300), the muddy water input unit (200) is arranged to be used for gently conveying muddy water to the lower part of the tank body (100), so that the muddy water enters the tank body (100) and then passes through a sludge suspension clarification area formed in the tank body (100), and the supernatant discharge unit (300) is arranged in the tank body (100). And the supernatant discharge unit (300) is arranged to be used for discharging the supernatant in the tank body (100). As stirring equipment is not required and a concentration tank is not required to be independently arranged, the investment cost and the operation cost can be remarkably reduced.

Description

Technical Field

[0001] The present application relates to the field of water treatment, and more specifically, to a sludge storage tank. Background Art

[0002] During sewage treatment, wastewater treatment, and water body remediation, some pollutants need to be discharged in the form of sludge to ensure the normal operation of the system. Generally, in order to ensure the normal operation of the subsequent sludge treatment system, a sludge storage tank is used to store the remaining sludge to balance the workload of the thickening tank, sludge conditioning tank, and dewatering machine. In order to prevent the sludge in the sludge storage tank from settling and decaying, in the prior art, it is usually necessary to use a submersible mechanical stirring method to mix the mud and water, and then pump the mud and water mixture into the thickening tank or sludge conditioning tank. At this time, the water content of the mud and water mixture pumped from the sludge storage tank is 99.2% to 99.6%. In other words, in order to prevent the sludge from settling and decaying, it is necessary to continuously use a submersible mechanical stirring method to mix the mud and water in the sludge storage tank. At the same time, the volume and operation of the thickening tank and sludge conditioning tank also need to be adapted thereto, which results in large investment and high operating costs.

[0003] Therefore, how to reduce the investment cost and operating expenses of water treatment facilities becomes a technical problem that needs to be solved in this application. Utility Model Content

[0004] In view of this, the present application proposes a sludge storage tank to reduce the investment cost and operating cost of water treatment facilities.

[0005] A sludge storage tank, wherein the sludge storage tank comprises a tank body, a sludge water input unit and a supernatant liquid discharge unit, wherein the sludge water input unit is configured to slowly transport the sludge water to the lower part of the tank body so that the sludge water passes through the sludge suspension clarification zone formed in the tank body after entering the tank body, and the supernatant liquid discharge unit is configured to discharge the supernatant located in the tank body.

[0006] Optionally, the mud and water input unit includes a water inlet trough installed on the side wall of the pool body, the water inlet trough includes a trough body, a diffuser plate, and a downward flow guide plate. The top of the trough body is open, and the bottom of the trough body is provided with water outlet holes arranged along the extension direction of the trough body. The diffuser plate is arranged below the trough body and inclined downward toward the side wall of the pool body to receive the mud and water falling through the water outlet holes. The downward flow guide plate extends downward from the bottom of the diffuser plate to define a downward flow channel for the mud and water together with the side wall of the pool body.

[0007] Optionally, the pool body is in the form of a rectangular parallelepiped, and the muddy water input unit includes two water inlet grooves respectively arranged on the side walls corresponding to the two long sides of the pool body, and the bottom of the pool body is provided with a downwardly inclined slope corresponding to the water inlet groove.

[0008] Optionally, the muddy water input unit includes a delivery pipe for inputting muddy water from the middle of the trough body, and along the extension direction of the trough body, the spacing between the water outlet holes gradually increases as approaching the delivery pipe.

[0009] Optionally, the supernatant discharge unit includes an overflow trough arranged at the upper part of the tank body, and the overflow trough discharges the supernatant through a drain pipe.

[0010] Optionally, the supernatant discharge unit includes a sliding decanter, which includes a float, a flexible tube and a guide rod. The float includes a water inlet tank with an overflow weir formed at the top, the water inlet tank is connected to one end of the flexible tube, and the flexible tube is configured to discharge the supernatant overflowing from the water inlet tank. The guide rod is fixed to the pool body, and the float is slidably arranged along the guide rod.

[0011] Optionally: the sliding decanter includes a counterweight mounted on the buoy and / or a valve for controlling drainage of the flexible pipe; and / or a stopper for limiting the lower limit position of the buoy is provided on the guide rod.

[0012] Optionally, the sludge storage tank comprises a sludge discharge device for discharging sludge from the bottom of the tank body.

[0013] Optionally, the mud discharge device includes a mud discharge pipe arranged at the bottom of the pool body and a mud discharge pump for sucking sludge through the mud discharge pipe, and through holes arranged along the extension direction of the mud discharge pipe are respectively arranged on both sides of the lower part of the mud discharge pipe.

[0014] Optionally: the through holes on both sides of the mud discharge pipe are staggered along the extension direction, and / or the axial direction of the through holes forms an angle of 40°-60° with the vertical direction; and / or the spacing between the through holes gradually increases along the direction close to the middle of the extension direction of the mud discharge pipe.

[0015] According to the technical solution of the present application, the sludge water can be slowly transported to the lower part of the tank body through the sludge water input unit, and then the sludge water passes through the sludge suspension clarification area, so that the sludge flocs in the sludge water are captured and intercepted by the sludge suspension layer in the sludge suspension clarification area, thereby forming a supernatant that can be discharged by the supernatant discharge unit above the sludge suspension clarification area, thereby reducing the water content of the sludge-water mixture in the sludge storage tank, and the sludge deposition and corruption can be avoided without continuous stirring. In addition, the sludge enriched in the sludge suspension clarification area is concentrated, settled, and gathered below to form a sludge concentration area under the action of gravity, so that storage and concentration can be achieved simultaneously through the sludge storage tank of the present application. Since there is no need to set up a stirring device or a separate concentration tank, the present application can significantly reduce investment costs and operating expenses.

[0016] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present application, and the schematic implementation modes and descriptions of the present application are used to explain the present application. In the accompanying drawings:

[0018] Figure 1 A top view of a mud storage tank according to an embodiment of the present application;

[0019] Figures 2 to 5 They are Figure 1 Cross-sectional views of sections AA, BB, CC, and DD;

[0020] Figure 6 For explanation Figure 2 A view of the installation structure of the middle mud discharge pipe;

[0021] Figure 7 for Figure 6 Side view of. DETAILED DESCRIPTION

[0022] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with the implementation modes.

[0023] According to one aspect of the present application, a sludge storage tank is provided, wherein the sludge storage tank includes a tank body 100, a sludge water input unit 200 and a supernatant liquid discharge unit 300, wherein the sludge water input unit 200 is configured to slowly transport the sludge water to the lower part of the tank body 100, so that the sludge water enters the tank body 100 and passes through a sludge suspension clarification zone formed in the tank body 100, and the supernatant liquid discharge unit 300 is configured to discharge the supernatant located in the tank body 100.

[0024] The sludge storage tank of the present application can slowly transport the sludge water to the lower part of the tank body 100 through the sludge water input unit 200, and then make the sludge water pass through the sludge suspension clarification area, so that the sludge flocs in the sludge water are captured and intercepted by the sludge suspension layer in the sludge suspension clarification area, thereby forming a supernatant that can be discharged by the supernatant discharge unit 300 above the sludge suspension clarification area, thereby reducing the water content of the sludge-water mixture in the sludge storage tank, and the sludge deposition and corruption can be avoided without continuous stirring. In addition, the sludge enriched in the sludge suspension clarification area is concentrated, settled, and gathered below to form a sludge concentration area under the action of gravity, so that storage and concentration can be achieved simultaneously through the sludge storage tank of the present application. Since there is no need to set up a stirring device or a separate concentration tank, the present application can significantly reduce investment costs and operating expenses.

[0025] Among them, Figure 5As shown, the sludge-water mixture in the tank body 100 forms a sludge concentration zone, a sludge suspension clarification zone and a clear water zone from bottom to top in the tank body 100. The sludge suspension clarification zone enriches the suspended sludge and forms a sludge suspension layer. The sludge water input from the sludge water input unit 200 will pass through the sludge suspension clarification zone when flowing upward and will be captured and intercepted by the sludge suspension layer, so that a clear water zone with a clearer supernatant is formed above the sludge suspension clarification zone, so that it can be discharged through the supernatant discharge unit 300 to reduce the water content in the tank body 100. The sludge enriched in the sludge suspension clarification zone is concentrated, settled and gathered below to form a sludge concentration zone under the action of gravity, so that the sludge storage tank of the present application also has the function of sludge concentration.

[0026] The muddy water input unit 200 may be in a suitable form so as to smoothly convey the muddy water to the lower part of the tank body 100. In a preferred embodiment of the present application, Figure 1 and Figure 5 As shown, the mud and water input unit 200 may include a water inlet trough 210 installed on the side wall of the pool body 100, the water inlet trough 210 includes a trough body 211, a diffuser 212, and a downward flow guide plate 213. The top of the trough body 211 is open, and the bottom of the trough body 211 is provided with water outlet holes 2111 arranged along the extension direction of the trough body 211. The diffuser 212 is arranged below the trough body 211 and tilted downward toward the side wall of the pool body 100 to receive the mud and water falling through the water outlet holes 2111. The downward flow guide plate 213 extends downward from the bottom of the diffuser 212 to define a downward flow channel L for the mud and water together with the side wall of the pool body 100.

[0027] The tank body 211 can be defined by the vertical plate 2112, the bottom plate 2113 and the side wall of the tank body 100, the water outlet 2111 is arranged on the bottom plate 2113, and the vertical plate 2112, the bottom plate 2113 and the side wall of the tank body 100 can be connected and fixed by appropriate means (such as fasteners). Muddy water can be input from the top of the tank body 211 (for example, pump input), and then flow along the extension direction of the tank body 211 and fall more evenly in the extension direction of the tank body 211 through the water outlet 2111. The falling muddy water can be received by the diffuser plate 212, so as to buffer the falling muddy water, reduce the flow rate and merge to form a stable fluid, and then flow downward to the end of the flow channel under the guidance of the downward flow guide plate 213 and enter the tank body 100.

[0028] In order to improve the efficiency of muddy water input, water inlet grooves 210 may be arranged around the circumference of the pool body 100. Preferably, in order to balance efficiency and cost, the pool body 100 is in the form of a rectangular parallelepiped, and the muddy water input unit 200 may include two water inlet grooves 210 respectively arranged on the side walls corresponding to the two long sides of the pool body 100, and the bottom of the pool body 100 is provided with a downwardly inclined slope 110 corresponding to the water inlet grooves 210. Thus, on the one hand, muddy water can be quickly input through the two water inlet grooves 210, and on the other hand, muddy water can be guided to quickly converge to the bottom of the pool body 100 after entering the pool body 100 through the slope 110, so as to avoid accumulation and blockage at the end of the flow channel.

[0029] It is understandable that the muddy water input unit 200 should be configured to be able to transport the muddy water to a position below the sludge suspension and clarification zone so that the muddy water can flow upward through the sludge suspension and clarification zone. The slope 110 at the bottom of the tank body 100 defines the maximum height of the sludge concentration zone. Preferably, the slope is at an angle of 40°-50° with the side wall of the tank body 100, and the lower end of the downward flow guide plate 213 extends to 10 cm-15 cm above the slope.

[0030] In addition, in order to make the muddy water fall evenly along the extension direction of the tank body 211, preferably, Figure 1 As shown, the muddy water input unit 200 includes a delivery pipe 220 for inputting muddy water from the middle of the trough body 211. Along the extension direction of the trough body 211, the spacing of the water outlet holes 2111 gradually increases as it approaches the delivery pipe 220. Therefore, when the muddy water enters from the middle of the trough body 211 through the delivery pipe 220, the muddy water flows along the trough body 211 to both ends of the trough body 211. Since the spacing of the water outlet holes 2111 gradually decreases from the middle of the trough body 211 to both ends, the muddy water is prevented from falling in large quantities from the area close to the delivery pipe 220, but falls evenly along the extension direction of the trough body 211.

[0031] In the present application, the supernatant discharge unit 300 may be in an appropriate form to discharge the supernatant. According to one embodiment of the present application, Figure 1 , Figure 2 and Figure 5As shown, the supernatant discharge unit 300 may include an overflow trough 310 disposed at the upper part of the tank body 100, and the overflow trough 310 discharges the supernatant through a drain pipe 330. When in use, when the liquid level of the supernatant in the clear water area is higher than the overflow trough 310, the supernatant can flow into the overflow trough 310 and be discharged through the drain pipe 330. The drain pipe 330 can lead the supernatant to a predetermined location, for example, the other end of the drain pipe 330 can extend to a drainage pit 500 near the tank body 100 (the drainage pit 500 can be provided with a sampling tube 600 for sampling and detecting the supernatant from the drainage pit 500 and a water outlet pipe 700 for discharging the supernatant in the drainage pit 500). The overflow trough 310 can be fixed to the upper part of the tank body 100, for example, it can be supported and positioned by a support beam P that spans the tank body 100 and is fixed on the opposite side walls of the tank body 100.

[0032] In order to facilitate drainage as needed when the liquid level of the supernatant changes, preferably, Figure 1 , Figure 3 and Figure 4 As shown, the supernatant discharge unit 300 may include a sliding decanter 320, which includes a float 321, a flexible tube 322 and a guide rod 323. The float 321 includes a water inlet tank 3211 with an overflow weir formed at the top, the water inlet tank 3211 is connected to one end of the flexible tube 322, and the flexible tube 322 is configured to discharge the supernatant overflowing from the water inlet tank 3211. The guide rod 323 is fixed to the pool body 100, and the float 321 is slidably arranged along the guide rod 323.

[0033] When in use, the float 321 can float according to the liquid level of the supernatant, and the flexible tube 322 can follow the movement of the float 321 to adjust the position, and the supernatant can enter from the water inlet tank 3211 and be discharged to a predetermined location through the flexible tube 322. For example, the other end of the flexible tube 322 can extend to the drainage pit 500. Specifically, the water inlet tank 3211 can be connected to the two flexible tubes 322, and the other ends of the two flexible tubes 322 can be connected to the supernatant discharge pipe 329 through the three-way assembly 328 to discharge the supernatant to the drainage pit 500.

[0034] The float 321 is configured to float in the clear water area, for example, floating on the surface of the supernatant, or suspended in the clear water area. The float 321 can achieve a floating effect by reasonably setting the proportion of its hollow part. In addition, the sliding decanter 320 may include a counterweight 324 installed on the float 321 so that the float 321 can float in the clear water area.

[0035] In addition, the overflow trough 310 and the sliding decanter 320 can be used alone as the supernatant discharge unit 300, or can be used in combination. For example, when muddy water is treated normally, drainage can be carried out through the overflow trough 310; when sludge needs to be discharged and the liquid level drops, drainage can be carried out through the sliding decanter 320. In order to facilitate the control of the operation of the sliding decanter 320, or to switch the state of the sliding decanter 320 according to different working conditions, the sliding decanter 320 includes a valve 325 for controlling the drainage of the flexible pipe 322. When it is necessary to drain water through the sliding decanter 320, the valve 325 can be opened, and when it is not necessary for the sliding decanter 320 to drain water, the valve 325 can be closed.

[0036] In order to prevent the float 321 from descending too much and then interfering with the sludge discharge, preferably, the guide rod 323 is provided with a stopper 326 for limiting the lower limit position of the float 321. When the float 321 descends to the lower limit position, the float 321 contacts the stopper 326 and cannot continue to descend. The stopper 326 can be releasably positioned on the guide rod 323, so that the height of the stopper 326 can be adjusted as needed, thereby adjusting the lower limit position height of the float 321. For example, the guide rod 323 can be provided with positioning holes arranged along its extension direction, and the stopper 326 can be detachably fixed to different positioning holes by fasteners to adjust its height.

[0037] The float 321 can be raised and lowered with the liquid level under the guidance of the guide rod 323. To this end, the bottom of the float 321 can be provided with an assembly hole for slidingly sleeved on the guide rod 323. In order to provide stable guidance for the float 321, the bottom of the guide rod 323 can be fixedly arranged in an appropriate manner. For example, the guide rod 323 is arranged vertically, and the bottom end of the guide rod 323 can be fixed (for example, pre-embedded) to the bottom wall of the pool body 100 through a fixing seat 327, and the guide rod 323 can also be fixed to the side wall of the pool body 100 through a transverse bracket S.

[0038] In the present application, in order to facilitate timely discharge of sludge from the bottom of the tank body 100 as needed, the sludge storage tank includes a sludge discharge device 400 for discharging sludge from the bottom of the tank body 100. The sludge discharge device 400 can be in an appropriate form, for example, Figure 2 , Figures 5 to 7In the illustrated embodiment, the mud discharge device 400 may include a mud discharge pipe 410 disposed at the bottom of the tank body 100 and a mud discharge pump for sucking mud through the mud discharge pipe 410. Through holes 411 arranged along the extension direction of the mud discharge pipe 410 are respectively disposed on both sides of the lower part of the mud discharge pipe 410. The mud discharge pump sucks mud at the bottom of the tank body 100 through the through holes 411. To ensure the suction effect, the mud discharge pipe 410 may be disposed close to the bottom of the tank body 100. For example, when there are slopes on both sides of the bottom of the tank body 100, the mud discharge pipe 410 may extend parallel to the flat bottom wall in the middle of the slopes.

[0039] The mud discharge pipe 410 can be fixed in an appropriate manner, for example, Figure 6 and Figure 7 In the illustrated embodiment, the mud discharge pipe 410 can be fixed (eg, welded) to an embedded part 430 embedded in the bottom wall of the tank body 100 via a pipe clamp 420 .

[0040] In addition, the through holes 411 on both sides of the sludge discharge pipe 410 can be staggered along the extension direction to avoid mutual interference in suction at the same cross section of the through holes 411 on both sides of the sludge discharge pipe 410. In order to facilitate suction of surrounding sludge in a larger range, the axial direction of the through hole 411 can be at an angle of 40°-60° with the vertical direction, so that the sludge around the sucked sludge can quickly fill the vacancy and continue to be sucked.

[0041] In addition, in order to allow the sludge at the bottom of the tank body 110 to be discharged evenly, preferably, the spacing between the through holes 411 gradually increases along the direction close to the middle of the extension direction of the sludge discharge pipe 410, so that there are more through holes 411 at both ends of the extension direction of the sludge discharge pipe 410, so as to suck out the large amount of sludge accumulated here, prevent sludge accumulation and dead sludge at the far end of the sludge discharge pipe 410 in the tank body 110, and also solve the problems of sludge corruption and sludge floating in conventional thickening tanks.

[0042] The operation of the sludge storage tank of the present application will be described below with reference to the accompanying drawings, wherein the overflow tank 310 and the sliding decanter 320 are used in combination.

[0043] The muddy water is pumped into the middle of the tank body 211 through the delivery pump through the delivery pipe 220, flows along the tank body 211 to both ends of the tank body 211 and falls evenly through the water outlet 2111 along the extension direction of the tank body 211, and the falling muddy water is received by the diffuser 212, the flow velocity is reduced and merged to form a stable fluid, and then flows downward to the end of the flow channel under the guidance of the downward flow guide plate 213, and enters the height corresponding to the sludge suspension clarification area in the tank body 100. When the muddy water flows upward, it passes through the sludge suspension clarification area and is captured and intercepted by the sludge suspension layer. The clarified water forms a clear water area above the sludge suspension clarification area, and the sludge enriched in the sludge suspension clarification area is concentrated, settled and gathered under the sludge suspension clarification area to form a sludge concentration area under the action of gravity.

[0044] When the muddy water is continuously transported through the muddy water input unit 200, the supernatant in the clean water area can overflow into the overflow tank 310, and then be discharged to the drainage pit 500 through the drainage pipe 330, and finally enter the sewage treatment system of the sewage treatment plant.

[0045] When the sludge in the tank body 100 accumulates too much (for example, the sludge reaches the upper limit monitored by the first mud level meter 450) and needs to be discharged, the delivery pump is turned off to stop the input of mud and water through the mud and water input unit 200, and the valve 325 is opened at the same time, and the supernatant is discharged to the drainage pit 500 through the sliding decanter 320. As the liquid level of the supernatant drops, the float 321 drops along the guide rod 323 and continues to drain until the float 321 contacts the stopper 326 and stops falling. At this time, the valve 325 can be closed (a liquid level meter that monitors the height of the stopper 326 can be set, and the closing of the valve 325 can be controlled by the feedback of the liquid level meter), and then the mud discharge pump can be turned on to suck the sludge in the sludge concentration area through the mud discharge pipe 410, so that the storage volume of the tank body 100 is restored. When the sludge liquid level reaches a predetermined position (for example, the low mud level monitored by the second mud level meter 460), the mud discharge pump can be turned off, and then the delivery pump can be turned on to continuously deliver mud and water again.

[0046] The delivery pump, the mud discharge pump and the valve 325 can be controlled in a linked manner, for example, by a PLC control unit.

[0047] The preferred embodiments of the present application are described in detail above; however, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, a variety of simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.

[0048] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0049] In addition, the various implementation modes of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A mud storage tank, characterized in that: The mud storage tank comprises a tank body (100), a mud water input unit (200) and a supernatant liquid discharge unit (300). The muddy water input unit (200) is configured to slowly convey muddy water to the lower part of the tank body (100), and the muddy water input unit (200) comprises a water inlet trough (210) installed on the side wall of the tank body (100), and the water inlet trough (210) comprises a downward flow guide plate (213), and the downward flow guide plate (213) and the side wall of the tank body (100) together define a downward flow channel for the muddy water, so that the muddy water passes through the sludge suspension clarification zone formed in the tank body (100) after entering the tank body (100). The supernatant liquid discharge unit (300) is configured to discharge the supernatant liquid in the cell body (100).

2. The sludge storage tank according to claim 1, characterized in that: The water inlet trough (210) further comprises a trough body (211) and a diffuser plate (212); the top of the trough body (211) is open; the bottom of the trough body (211) is provided with water outlet holes (2111) arranged along the extension direction of the trough body (211); the diffuser plate (212) is arranged below the trough body (211) and is inclined downward toward the side wall of the pool body (100) to receive muddy water falling through the water outlet holes (2111); and the downward flow guide plate (213) extends downward from the bottom of the diffuser plate (212).

3. The sludge storage tank according to claim 2, characterized in that: The pool body (100) is in the form of a rectangular parallelepiped, and the muddy water input unit (200) comprises two water inlet grooves (210) respectively arranged on the side walls corresponding to the two long sides of the pool body (100), and the bottom of the pool body (100) is provided with a downwardly inclined slope surface (110) corresponding to the water inlet grooves (210).

4. The sludge storage tank according to claim 2, characterized in that: The muddy water input unit (200) comprises a delivery pipe (220) for inputting muddy water from the middle of the trough body (211), and along the extension direction of the trough body (211), the spacing between the water outlet holes (2111) gradually increases as approaching the delivery pipe (220).

5. The sludge storage tank according to any one of claims 1 to 4, characterized in that: The supernatant liquid discharge unit (300) comprises an overflow trough (310) arranged at the upper part of the tank body (100), and the overflow trough (310) discharges the supernatant liquid through a drain pipe (330).

6. The sludge storage tank according to any one of claims 1 to 4, characterized in that: The supernatant discharge unit (300) includes a sliding decanter (320), the sliding decanter (320) includes a float (321), a flexible tube (322) and a guide rod (323), the float (321) includes a water inlet tank (3211) with an overflow weir formed at the top, the water inlet tank (3211) is connected to one end of the flexible tube (322), the flexible tube (322) is configured to discharge the supernatant overflowing from the water inlet tank (3211), the guide rod (323) is fixed to the pool body (100), and the float (321) is slidably arranged along the guide rod (323).

7. The sludge storage tank according to claim 6, characterized in that: The sliding decanter (320) includes a counterweight (324) mounted on the buoy (321) and / or a valve (325) for controlling the drainage of the flexible pipe (322); and / or, The guide rod (323) is provided with a stopper (326) for limiting the lower limit position of the buoy (321).

8. The sludge storage tank according to any one of claims 1 to 4, characterized in that: The sludge storage tank comprises a sludge discharge device (400) for discharging sludge from the bottom of the tank body (100).

9. The sludge storage tank according to claim 8, characterized in that: The mud discharge device (400) comprises a mud discharge pipe (410) arranged at the bottom of the tank body (100) and a mud discharge pump for sucking mud through the mud discharge pipe (410), and through holes (411) arranged along the extension direction of the mud discharge pipe (410) are respectively arranged on both sides of the lower part of the mud discharge pipe (410).

10. The sludge storage tank according to claim 9, characterized in that: The through holes (411) on both sides of the mud discharge pipe (410) are arranged alternately along the extension direction, and / or the axial direction of the through hole (411) forms an angle of 40°-60° with the vertical direction; and / or, Along the direction close to the middle of the extension direction of the mud discharge pipe (410), the spacing between the through holes (411) gradually increases.

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