CN216550053U - Drainage silt directional multi-stage separation system - Google Patents

Drainage silt directional multi-stage separation system Download PDF

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CN216550053U
CN216550053U CN202122909566.4U CN202122909566U CN216550053U CN 216550053 U CN216550053 U CN 216550053U CN 202122909566 U CN202122909566 U CN 202122909566U CN 216550053 U CN216550053 U CN 216550053U
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water
sand
sludge
grating
water outlet
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穆晓东
刘启诚
秦春禹
应梅娟
高保华
李艳
李晓辉
王志峰
张衡
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Beijing Drainage Equipment Co ltd
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Beijing Drainage Equipment Co ltd
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Abstract

The utility model relates to the field of drainage, in particular to a drainage sludge directional multistage separation system, which comprises: the first grating and the second grating are sequentially arranged along the water flow direction; the sand-water separator is connected with the water outlet of the second grating; the organic particle separation unit is connected with an upper-layer water outlet of the sand-water separator; a water inlet of the cyclone is connected with a water outlet of the organic particle separation unit; the sludge dewatering device is connected with the water outlet of the swirler; and the matched flushing device is connected with the sand-water separator and the organic particle separation unit. By utilizing the process principles of hydraulic washing, physical screening, three-phase rotational flow, particle size separation, gravity precipitation and the like, the mixed components in the sludge of the urban drainage pipe network are accurately separated into a plurality of materials with single components and stable properties, so that the aims of reduction, harmlessness and recycling of the drainage sludge are fulfilled, and the pollution of the urban drainage sludge to the ecological environment is reduced.

Description

Drainage silt directional multi-stage separation system
Technical Field
The utility model relates to the field of drainage, in particular to a drainage sludge directional multistage separation system.
Background
The sediment is discharged and falls off from the outside, and part of substances in sewage or rainwater are deposited in drainage pipelines, pipe channels, pump stations and storage tanks of cities and towns due to factors such as gravity sedimentation, adhesion, interception and the like, and is called drainage sediment for short.
In order to maintain the normal operation of the urban drainage system, urban drainage pipelines, pipe channels, pump stations and storage tanks need to be maintained, dredged, desilted and the like regularly, the drainage sediment sludge contains particles and impurities which enter a pipeline conveying system along with urban domestic sewage, road dust fall, garbage, slurry discharged from some construction sites and the like, and if the drainage sediment sludge is not cleaned in time, drainage is not smooth easily, and sediment sludge deposited in the pipelines can also enter rivers along with rainwater to pollute water bodies in rainy seasons. The sludge in the channel has large yield, complex components and serious pollution, and the improper treatment can cause serious secondary pollution and destroy the ecological environment. The drainage sediment usually contains building wastes such as concrete blocks and bricks, as well as substances such as sand, soil, organic particulate matters, branches, leaves, oils and the like.
The drainage sludge treatment and disposal technology in China starts late, and at the present stage, the common treatment mode comprises the following steps:
(1) directly stacking the cleared sludge in the green land;
(2) handing over to an outsourcing unit for consignment handling: transporting the mixture to a rural depression, dumping the mixture or mixing the mixture in building residue soil for disposal;
(3) transferring to a sludge transfer station for precipitation dehydration or transferring to a suburb drying yard for drying, and then transferring to a refuse dump for landfill.
The disposal method has the defects of secondary pollution, bacterial breeding and difficult management and control, and is unfavorable for natural environment and social environment. With the continuous improvement of urban environment and the improvement of people on the safety cognition of drainage, the drainage sludge treatment technology is continuously developed, and the treatment process can be divided into a dehydration reduction method and a physical separation method.
(1) Dewatering reduction method
The dehydration reduction method comprises mechanical dehydration and heating drying.
The mechanical dehydration is to remove free water and partial interstitial water in the sludge by using the characteristics of high content of settled sludge and sand and poor water holding capacity and adopting the modes of centrifugation, squeezing and the like. However, as a large amount of building wastes such as blocky bricks and stones are mixed in the drainage sludge in China, the drainage sludge causes abrasion to dewatering equipment, so that the conventional mechanical dewatering equipment cannot normally operate, and the sludge is directly subjected to mechanical dewatering and is not suitable for the national conditions of China.
The heating and drying mainly utilizes the mode of external source heating to replace natural airing to rapidly dry the sludge, and has the advantages of small occupied area and relatively concentrated operation management. However, the requirement of the drying process on the raw materials is more strict, the drying equipment is more easily worn by impurities such as stones, and the drying equipment is not suitable for popularization and application in China due to high carbon emission and high operating cost.
(2) Physical separation method
In the drainage sludge settling treatment, the physical separation method can be summarized as follows: according to the basic properties of different materials in the sludge, mechanical equipment and matched structures are utilized to effectively wash, separate and screen the mixed sludge at different working sections, and finally, the step-by-step acquisition of components such as large grid slag, sand with different particle size ranges, organic matters and the like is completed, so that the reduction and harmless treatment of the discharged water and the settled sludge is completed.
Recently, some municipal sewage plants in Beijing, Shanghai, Tianjin, Nanjing and other areas have made related physical separation technology attempts and have achieved certain positive effects.
The Beijing certain reclaimed sewage plant is provided with a drainage sludge disposal industrial device which takes 'coarse-axis spiral grating separation-sand-water separation-fine-axis spiral grating separation-cyclone separation' as a main process route; the main process route of the demonstration device for treating the sludge in a certain drainage pipe network in Shanghai is 'separation of large-particle-size slag-stirring and elutriation-separation of medium-particle-size slag-sludge separation'; the process route of treating certain drainage sludge in Shanghai is 'washing shaft spiral-sand washing-fine grid-water conservancy rotational flow and sand-water separation-inclined plate sedimentation'; the process for treating certain drainage sludge in Shanghai comprises stirring, slag fishing, sand-water separation and scum dehydration; the sludge treatment process of a certain pipe network in Henan comprises the steps of filtering, screening, sediment precipitation and separation, dehydration, drying and compression into cakes. The process separates, dehydrates and recycles garbage, building sand and compostable sludge in the discharged sludge to different degrees.
The practical application of the technology of coarse-axis spiral grating separation-sand-water separation-fine-axis spiral grating separation-cyclone separation has the following problems: the coarse shaft spiral grating separation system is not provided with a pretreatment unit, and is easily damaged by substances such as large building rubbish and the like, so that the normal operation of equipment is influenced; the organic matter content of the materials separated by the coarse shaft spiral grating and the sand-water separator is high, and the materials can meet the requirement of recovery or reuse after further treatment; the material separated by the cyclone separator has high water content and is difficult to recycle; in addition, the system pipeline, the sand-water separator, the thin-shaft spiral grating and the cyclone separator are easy to block and need to be periodically disassembled for cleaning.
The practical application of the technology of separating large-particle-size slag, stirring and elutriating, separating medium-particle-size slag and separating mud and water has the following problems: the efficiency of material grading recovery and resource recovery is low, the recovery rate of thick materials is about 11%, and the recovery rate of sand water is about 22%; meanwhile, the water requirement in the elutriation process and the material separation process is large, and the ratio of the washing water quantity to the treated materials is slightly higher than 10: 1; the process results in large amount of discharged sewage to be treated and high content of fine sand and suspended matters in the sewage.
The practical application of the technologies of washing shaft spiral, sand washing, fine grating, hydraulic cyclone, sand-water separation and inclined plate precipitation has the following problems: the technology is basically similar to the process of coarse-axis spiral grating separation, sand-water separation, fine-axis spiral grating separation and cyclone separation, and the process has the main functions of removing fine sand more than 0.2mm and has low removal rate of fine sand and superfine sand less than 0.2mm except the problems of easy blockage, high water content of partial discharged materials, high content of organic matters in the discharged materials, more discharged materials of the cyclone separator, difficulty in recycling and the like.
The practical application of the technology of stirring-slag-sand-water separation-scum dehydration has the following problems: the energy consumption in the material treatment process is high, the loss of stirring-slag-dragging process equipment is large, the sand-water separation process is easy to block, and the efficiency of the whole material recycling process is low.
The practical application of the technology of filtering and screening, sediment precipitation and separation, dehydration and drying, and compression into cakes has the following problems: the process pretreatment unit has high pressure and is easily influenced by factors such as unstable incoming materials, the dehydration and drying process needs to be matched with a heat source, the energy consumption is high, the discharging of the cake compression unit is unstable, and the like.
In conclusion, the treatment of the discharged sludge in the prior art mainly has the problems of high content of desanded organic matters, difficulty in removing small-particle-size sand, high energy consumption, high loss, large discharged water amount, low overall material recycling efficiency and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a directional multistage separation system for drainage sludge, which is characterized in that a multistage grid is used for accurately separating solid particles with different sizes, sand and organic matter with small particle sizes are effectively removed by utilizing a sand-water separator, an organic particle separation unit and a cyclone, mixed components in sludge of a town drainage pipe network are accurately separated into a plurality of materials with single components and stable properties, the purposes of reduction, harmlessness and recycling of the drainage sludge are realized, the pollution of the town drainage sludge to the ecological environment is reduced, the removal effect of the small particle size sand is improved, the energy consumption and the discharged water amount are reduced, and the material recycling efficiency is improved.
In order to achieve the above object, the present invention provides a drainage sludge directional multistage separation system, comprising:
the device comprises a first grating and a second grating with increasing precision, wherein the first grating and the second grating are sequentially arranged along the water flow direction;
the sand-water separator is connected with the water outlet of the second grating;
the organic particle separation unit is connected with an upper-layer water outlet of the sand-water separator;
a water inlet of the cyclone is connected with a water outlet of the organic particle separation unit;
the sludge dewatering device is connected with the water outlet of the cyclone;
and the matched flushing device is connected with the sand-water separator and the organic particle separation unit.
Preferably, the first grid is an 80mm grid and the second grid is a 10mm grid.
Preferably, the device further comprises a balance feeding device, and the balance feeding device is arranged between the first grid and the second grid.
Preferably, the balanced feeding device comprises a shaft screw.
Preferably, the sand-water separator is a washing sand-water separator, and the matched flushing device can spray flushing stirring water into the washing sand-water separator to form a fluidized sand bed.
Preferably, the organic particle separation unit comprises a 2mm grid.
Preferably, the device further comprises a reuse water tank, a water inlet of the reuse water tank is connected with the water outlet of the organic particle separation unit, an upper-layer water outlet of the reuse water tank is connected with a jet flushing device, the jet flushing device can perform jet flushing on the inside of the shaft spiral, and a lower-layer water outlet of the reuse water tank is connected with the cyclone and the sludge dewatering device.
Preferably, the sludge dewatering device comprises a sedimentation device.
Preferably, the device further comprises a water storage tank, a water inlet of the water storage tank is connected with a water outlet of the sludge dewatering device, and a water outlet of the water storage tank is connected with the sand-water separator and the organic particle separation unit through the matched flushing device.
Preferably, the system further comprises a material recycling device for recycling materials output by the first grating, the second grating, the sand-water separator, the organic particle separation unit, the cyclone and the sludge dewatering device.
The technical scheme of the utility model has the beneficial effects that:
1. providing a first grid as a pretreatment unit to reduce the blockage of subsequent systems by large solids;
2. a washing sand-water separator is selected, the functions of sand separation and sand washing are integrated, sand-slag-water separation is carried out by utilizing rising fluidized bed washing and three-phase cyclone separation through the wall attachment effect, and the optimal cleaning effect can be realized while separation is carried out;
3. the organic particle separation unit is used for removing concentrated organic particles, so that the problem of high content of desanding organic matters is effectively solved;
4. the problem of removing small-particle-size sand is effectively solved by adopting a high-efficiency rotational flow technology;
5. the treatment process is a physical separation method, no chemical agent is added, gravity flow is realized by utilizing the height difference between equipment and a structure and multiple process sections, and the method is low-carbon and energy-saving;
6. the matched flushing device is additionally arranged, the process water is recycled by 100%, the amount of discharged wastewater and the content of solid impurities in the wastewater are reduced, the water consumption and the water discharge of the whole system are both reduced, and the impact of the discharged wastewater on a subsequent sewage treatment system is reduced.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
FIG. 1 shows a schematic process flow diagram according to one embodiment of the present invention.
Description of reference numerals:
1. a first grid; 2. a balanced feeding device; 3. a second grid; 4. a sand-water separator; 5. an organic particle separation unit; 6. a swirler; 7. a sludge dewatering device; 8. a reuse water tank; 9. a water storage tank.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
The utility model provides a drainage sludge directional multistage separation system, which comprises:
the first grating and the second grating are sequentially arranged along the water flow direction;
the sand-water separator is connected with the water outlet of the second grating;
the organic particle separation unit is connected with an upper-layer water outlet of the sand-water separator;
a water inlet of the cyclone is connected with a water outlet of the organic particle separation unit;
the sludge dewatering device is connected with the water outlet of the cyclone;
and the matched flushing device is connected with the sand-water separator and the organic particle separation unit.
Specifically, the discharged settled sludge removed from the drainage pipe network is separated from large building garbage, branches, garbage bags and other impurities through a first grating, materials are quantitatively input into a second grating through a balanced feeding device, the materials are washed and filtered through the second grating, the settled sludge materials in the discharged water are scattered, homogenized and homogenized, large granular solid substances are intercepted inside the second grating and output to a slag discharging end, small granular solid substances and washing water gravity flow into a sand-water separator, and the large granular solid substances separated by the second grating are subjected to winnowing and then are recycled as building recycled aggregates; the sand-water separator makes inorganic mineral particles in the silt to be subjected to sand-water separation under the optimal hydraulic condition by utilizing the wall attachment effect, meanwhile, a matched flushing device sprays quantitative flushing and stirring water inwards to generate a fluidized sand bed, organic matters are separated from the sand to obtain sand of 0.2-10 mm, the sand smaller than 0.2mm and light floating slag in the silt are brought into an upper layer water outlet by utilizing ascending flow and are discharged into an organic particle separation unit, and the organic particles are removed in a centralized manner to obtain organic matters with high heat values, and the organic matters can be recycled as fuel; the effluent of the organic particle separation unit tangentially enters the cyclone from a water inlet of the cyclone under certain pressure to generate strong rotation shearing turbulent flow motion, and due to the fact that the solid particles have different force differences and are subjected to different centrifugal forces, fluid drag forces and the like, under the action of centrifugal sedimentation, the particles with the particle size of 0.075-0.2 mm are drained from a bottom flow port of the cyclone after being dehydrated through gravity; the sludge dewatering device separates mud from water and dewaters the mud to form mud cakes which can be used as raw materials for making bricks or ceramics grains for recycling.
The system is provided with a matched flushing device, the treated tail water of the system is used as flushing water of the sand-water separator and the organic particle separation unit, 100% cyclic utilization of the process water is realized, and the solids discharged by each stage of separation unit are recycled.
Preferably, the first grid is an 80mm grid and the second grid is a 10mm grid.
Specifically, the precision of the first grating and the second grating can be set according to specific working conditions, in one embodiment, the first grating is a grating with the precision of 80mm, the second grating is a grating with the precision of 10mm, and the first grating can be used as a pretreatment unit of a treatment system, so that the damage of substances such as massive construction waste is reduced, and the normal operation of equipment of a subsequent separation unit is prevented from being influenced.
Preferably, the device further comprises a balance feeding device, and the balance feeding device is arranged between the first grid and the second grid.
Specifically, after the drainage is primarily filtered by the first grating, the drainage enters the balanced feeding device to quantitatively feed the second grating, so that the second grating is prevented from being blocked by materials, and the treatment efficiency is reduced.
Preferably, the balanced feeding device comprises a shaft screw.
Specifically, through the rotation operation of the shaft screw, the recycled water in the system is simultaneously utilized to spray washing water to the inside of the shaft screw, so that the materials are homogenized, the combined large materials are scattered, solid matters larger than 10mm are intercepted inside the second grating and output to a residue outlet end, solid particles smaller than 10mm and the washing water gravity flow into a sand-water separator, and the separated materials with the particle size of more than 10mm are subjected to air separation and then are used as building recycled aggregate.
Preferably, the sand-water separator is a washing sand-water separator, and the matched flushing device can spray flushing stirring water into the washing sand-water separator to form a fluidized sand bed.
Specifically, a washing sand-water separator is selected, the sand separating and washing functions are integrated, and the sand-water separation of inorganic mineral particles in the silt is carried out under the optimal hydraulic condition by utilizing the rising fluidized bed washing and three-phase cyclone separation principle through the wall attachment effect. Meanwhile, quantitative washing and stirring water is sprayed inwards by an external device to generate a fluidized sand bed, sand can be formed into a rising suspension state by utilizing the specially designed rising fluidized bed, collision friction is generated among the gravels in the rising process, organic matters attached to the gravels are scrubbed and fall off, and the organic matters are separated from the sand to obtain 0.2-10 mm sand; meanwhile, by utilizing a density sorting principle, light floating slag in sand and settled sludge smaller than 0.2mm is brought into an upper layer water outlet by utilizing ascending flow and is discharged into a next separation unit. The content of organic matters in the separated 0.2-10 mm sand is less than 5%, so that the resource recycling of the separated product is realized.
The principle of realizing sand-water separation by the wall attachment effect is that mixed water containing sand and organic matters flows into a feeding horn tube, namely a feeding area of the stainless steel sand washing device, and liquid flow can be converted from the vertical direction to the horizontal direction and uniformly distributed in a box body through the wall attachment effect. The feeding area is high-speed liquid flow, when the speed of the liquid flow in the turning horizontal direction is suddenly reduced, solid content (sand and stone particles and organic matters) in the liquid flow is separated according to the sinking speed of the particles under the synergistic action of liquid flow turning and flow speed reduction, and then enters the lower section area of the box body. This particular flow behavior results in an efficient solid-liquid separation. When the diameter of the sand material is larger than 0.2mm, the separation efficiency can reach more than 95 percent.
Preferably, the organic particle separation unit comprises a 2mm grid.
Specifically, washing sand water separator exhaust water includes organic granule and the sand that the particle diameter is less than 0.2mm, goes out the water and flows into organic granule separation element through the gravity, and organic granule separation element chooses fine grid for use, and filter fineness is 2mm, concentrates organic granule to get rid of, obtains the organic matter of high calorific value, can retrieve as fuel.
Preferably, the device also comprises a reuse water tank, the water inlet of the reuse water tank is connected with the water outlet of the organic particle separation unit, the upper-layer water outlet of the reuse water tank is connected with a jet flushing device, the jet flushing device can carry out jet flushing on the interior of the shaft spiral, and the lower-layer water outlet of the reuse water tank is connected with the cyclone and the sludge dewatering device.
Specifically, a reuse water tank is arranged in the middle of the treatment system, the effluent of the organic particle separation unit enters the reuse water tank, precipitation slurry and supernatant can be obtained through precipitation, the supernatant is used as reuse water of the treatment system and is sprayed to the inside of the shaft spiral, materials entering the 10mm grid are scattered, the 10mm grid is washed, the drained water is recycled, and the drainage burden is reduced; the sediment with a certain concentration at the bottom of the reuse water tank enters a cyclone and a sludge dewatering device to be continuously purified and separated.
Preferably, the sludge dewatering device comprises a sedimentation device.
Specifically, the muddy water treated by the cyclone and part of the muddy water in the reuse water tank enter a sludge dewatering device, are efficiently precipitated by a precipitation device, are dewatered and air-dried to form a mud cake, can be used as raw materials for making bricks or ceramics grains for recycling, and the water after the mud removal can also enter a reuse water tank to continue serving as reuse water.
Preferably, the device also comprises a water storage tank, wherein a water inlet of the water storage tank is connected with a water outlet of the sludge dewatering device, and a water outlet of the water storage tank is connected with the sand-water separator and the organic particle separation unit through a matched flushing device.
Specifically, the system tail water and the supernatant overflowed from the reuse water pool are collected to a water storage tank after being efficiently precipitated by the precipitation device and are used as washing water for washing a sand-water separator and an organic particle separation unit, so that 100% of cyclic utilization of process water is realized.
Preferably, the device also comprises a material recovery device which is used for recovering the materials output by the first grating, the second grating, the sand-water separator, the organic particle separation unit, the cyclone and the sludge dewatering device.
Specifically, the separation units of the treatment system are connected with material recovery devices, so that recyclable and renewable construction waste, 0.2-10 mm sand and 0.075-0.2 mm sand can be obtained respectively and can be recycled as construction materials; the organic particles can be used as high-calorific-value organic matters for combustion energy supply; the dehydrated mud cake can be used as a raw material for making bricks and ceramic granules, greatly improves the resource rate of the discharged and deposited mud, and reduces the cost of additional waste disposal.
Example (b):
the utility model provides a drainage sludge directional multistage separation system, which comprises:
the device comprises a first grating 1 and a second grating 3 with gradually increased precision, wherein the first grating 1 and the second grating 3 are sequentially arranged along the water flow direction;
the sand-water separator 4 is connected with the water outlet of the second grating 3;
the organic particle separation unit 5 is connected with the upper water outlet of the sand-water separator 4;
a water inlet of the cyclone 6 is connected with a water outlet of the organic particle separation unit 5;
the sludge dewatering device 7 is connected with the water outlet of the swirler 6;
and the matched flushing device is connected with the sand-water separator 4 and the organic particle separation unit 5.
In this embodiment, the first grid 1 is an 80mm grid, and the second grid 3 is a 10mm grid.
In the embodiment, the device further comprises a balance feeding device 2, and the balance feeding device 2 is arranged between the first grid 1 and the second grid 3.
In this embodiment, the balanced feeding device 2 comprises a shaft screw.
In this embodiment, sand water separator 4 is washing sand water separator, and supporting washing unit can wash the stirring water to spraying in the washing sand water separator, forms the fluidized sand bed.
In this embodiment, the organic particle separating unit 5 is a 2mm grid.
In this embodiment, still include reuse pond 8, the water inlet of reuse pond 8 is connected with the delivery port of organic particle separation unit 5, and the upper delivery port and the injection washing unit of reuse pond 8 are connected, and injection washing unit can spray in the axial helix and wash, and the lower floor's delivery port and the swirler 6 of reuse pond 8 and sludge dewatering device 7 are connected.
In this embodiment, the sludge dewatering device 7 includes a settling device.
In the embodiment, the device further comprises a water storage tank 9, a water inlet of the water storage tank 9 is connected with a water outlet of the sludge dewatering device 7, and a water outlet of the water storage tank 9 is connected with the sand-water separator 4 and the organic particle separation unit 5 through a matched flushing device.
In this embodiment, the system further comprises a material recycling device, which is used for recycling the materials output by the first grating 1, the second grating 3, the sand-water separator 4, the organic particle separation unit 5, the cyclone 6 and the sludge dewatering device 7.
In conclusion, the discharged silt cleared from the drainage pipe network separates large building garbage, branches, garbage bags and other impurities through the first grating 1, the screening precision is 80mm, after the discharged silt is filtered through the first grating 1, silt settling materials in the discharged water are scattered and homogenized through the axial screw and enter the second grating 3, solid matters larger than 10mm are intercepted inside the second grating 3 and output to a slag discharging end, and the solid matters smaller than 10mm and washing water flow into the sand-water separator 4 through the gravity; the sand-water separator 4 utilizes the wall attachment effect to separate the sand and water of inorganic mineral particles in the silt under the best hydraulic condition, simultaneously sprays quantitative flushing stirring water inwards by a matched flushing device to generate a fluidized sand bed, separates organic matters from the sand, separates out sand with the thickness of 0.2-10 mm, brings sand with the thickness of less than 0.2mm and light floating slag in the silt into an upper layer water outlet by utilizing ascending flow, and discharges the sand and the sand into an organic particle separation unit 5 to intensively remove the organic particles; the effluent of the organic particle separation unit 5 tangentially enters the cyclone 6 from a water inlet of the cyclone 6 at a certain pressure to generate strong rotation shearing turbulent flow motion, and due to the fact that the solid particles have different force differences and are subjected to different centrifugal forces, fluid drag forces and the like, under the action of centrifugal sedimentation, the particles with the particle size of 0.075-0.2 mm are discharged from a bottom flow port of the cyclone 6 after being dehydrated by gravity; the sludge dewatering device 7 separates and dewaters mud and water to form mud cakes which can be used as raw materials for making bricks or ceramics grains for recycling. The system is provided with a matched flushing device, treated system tail water is used as flushing water of the sand-water separator 4 and the organic particle separation unit 5, 100% cyclic utilization of process water is achieved, and solids discharged by each stage of separation unit are recycled.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (10)

1. The utility model provides a directional multistage piece-rate system of mud is sunk in drainage which characterized in that includes:
the device comprises a first grating and a second grating with increasing precision, wherein the first grating and the second grating are sequentially arranged along the water flow direction;
the sand-water separator is connected with the water outlet of the second grating;
the organic particle separation unit is connected with an upper-layer water outlet of the sand-water separator;
a water inlet of the cyclone is connected with a water outlet of the organic particle separation unit;
the sludge dewatering device is connected with the water outlet of the cyclone;
and the matched flushing device is connected with the sand-water separator and the organic particle separation unit.
2. The discharged sludge directional multistage separation system of claim 1, wherein the first grid is an 80mm grid and the second grid is a 10mm grid.
3. The drained sludge directional multistage separation system as claimed in claim 1, further comprising a balanced feeding device disposed between the first and second grids.
4. The drained sludge directional multistage separation system of claim 3 wherein the balanced feed device comprises a shaft screw.
5. The system of claim 1, wherein the sand-water separator is a washed sand-water separator, and the associated flushing means is capable of injecting flushing stirring water into the washed sand-water separator to form a fluidized sand bed.
6. The discharged sludge directional multistage separation system of claim 1 wherein the organic particle separation unit comprises a 2mm grid.
7. The directional multistage separation system for discharged sludge according to claim 4, further comprising a reuse water tank, wherein a water inlet of the reuse water tank is connected with the water outlet of the organic particle separation unit, an upper layer water outlet of the reuse water tank is connected with a jet flushing device, the jet flushing device can perform jet flushing on the inside of the shaft spiral, and a lower layer water outlet of the reuse water tank is connected with the cyclone and the sludge dewatering device.
8. The drain sludge directional multistage separation system of claim 1, wherein the sludge dewatering apparatus comprises a sedimentation apparatus.
9. The directional multistage separation system for discharged sludge according to claim 1, further comprising a water storage tank, wherein a water inlet of the water storage tank is connected with a water outlet of the sludge dewatering device, and a water outlet of the water storage tank is connected with the sand-water separator and the organic particle separation unit through the matched flushing device.
10. The system of claim 1, further comprising a material recovery device for recovering the materials output by the first grid, the second grid, the sand-water separator, the organic particle separation unit, the cyclone and the sludge dewatering device.
CN202122909566.4U 2021-11-24 2021-11-24 Drainage silt directional multi-stage separation system Active CN216550053U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113998853A (en) * 2021-11-24 2022-02-01 北京北排装备产业有限公司 Drainage silt directional multi-stage separation system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113998853A (en) * 2021-11-24 2022-02-01 北京北排装备产业有限公司 Drainage silt directional multi-stage separation system

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