CN113683280A - Efficient recycling method and recycling system for deposited sludge - Google Patents
Efficient recycling method and recycling system for deposited sludge Download PDFInfo
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- CN113683280A CN113683280A CN202111014617.5A CN202111014617A CN113683280A CN 113683280 A CN113683280 A CN 113683280A CN 202111014617 A CN202111014617 A CN 202111014617A CN 113683280 A CN113683280 A CN 113683280A
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- 239000010802 sludge Substances 0.000 title claims abstract description 329
- 238000004064 recycling Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000003756 stirring Methods 0.000 claims abstract description 43
- 238000005273 aeration Methods 0.000 claims abstract description 37
- 239000013535 sea water Substances 0.000 claims abstract description 17
- 230000008021 deposition Effects 0.000 claims description 8
- 239000003245 coal Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 238000001223 reverse osmosis Methods 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000010344 co-firing Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 15
- 230000007613 environmental effect Effects 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 7
- 239000010865 sewage Substances 0.000 abstract description 7
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 239000002002 slurry Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000010842 industrial wastewater Substances 0.000 description 3
- 150000002632 lipids Chemical class 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 238000010612 desalination reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The embodiment of the invention discloses a method and a system for efficiently recycling deposited sludge, which comprises a sludge tank, a sewage treatment device and a sewage treatment device, wherein the sludge tank is arranged to collect sludge deposited in a power plant seawater pretreatment device; aerating and stirring the sludge at the bottom of the sludge tank in a compressed air aeration mode, and performing impact stirring in the vertical direction on the sludge at the bottom of the sludge tank in a hydraulic impact mode; conveying the sludge subjected to double stirring in the sludge tank to a sludge concentration tank of an adjacent plant through a pipeline for concentration, and separating the sludge into upper-layer overflow clear water and lower-layer sludge in the sludge concentration tank; and collecting the dehydrated dry sludge of the lower layer of sludge, and simultaneously returning the overflow clear water of the upper layer to the sludge tank through a pipeline. The sludge at the bottom of the sludge tank is simultaneously stirred by two modes of compressed air aeration and hydraulic impact, so that the sludge conveying effect is improved, the deposited sludge generated by the seawater pretreatment device is timely and efficiently transferred and discharged, the energy conservation and environmental protection in the true sense are realized, and the economic benefit is brought.
Description
Technical Field
The embodiment of the invention relates to the technical field of environmental protection engineering, in particular to a high-efficiency recycling method and a recycling system for deposited sludge.
Background
Some power plants along the sea usually adopt seawater desalination water as a production water source, in the seawater desalination process, a pretreatment device can often generate sludge, the sludge is usually discharged by a sludge lifting pump, but some cogeneration power plants find that the sludge conveying effect is not good when unit maintenance is carried out at the end of a heating period, a sludge pool deposits a lot of sludge, if the sludge is not timely cleaned and transported, anaerobic reaction can occur in the accumulation process of the sludge, the sludge property is changed, foul odor is generated and various harmful substances such as lipids are generated, the sludge lifting port of the sludge pool is small, the manual dredging work is large in workload and large in implementation difficulty, the sludge directly transported and discharged is large in moisture content and not beneficial to subsequent treatment, and the sludge deposited in the seawater pretreatment device currently becomes a problem of a lot of power plants.
Disclosure of Invention
Therefore, the embodiment of the invention provides a method and a system for efficiently recycling deposited sludge, which aim to solve the problem that the deposited sludge in a power plant seawater pretreatment device in the prior art is difficult to treat.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
according to a first aspect of the embodiment of the invention, the method for efficiently recycling the deposited sludge is applied to the sludge deposited in the seawater pretreatment device of the power plant, and comprises the following steps:
arranging a sludge tank to collect sludge deposited in the power plant seawater pretreatment device;
aerating and stirring the sludge at the bottom of the sludge tank in a compressed air aeration mode, and performing impact stirring in the vertical direction on the sludge at the bottom of the sludge tank in a hydraulic impact mode;
conveying the sludge subjected to double stirring in the sludge tank to a sludge concentration tank of an adjacent plant through a pipeline for concentration, and separating the sludge into upper-layer overflow clear water and lower-layer sludge in the sludge concentration tank;
and collecting the dewatered dry sludge of the lower layer of sludge, recycling the sludge, simultaneously returning the upper layer of overflow clear water to the sludge tank through a pipeline, and performing impact stirring on the sludge at the bottom of the sludge tank in a hydraulic impact mode.
Further, the compressed air aeration mode comprises the following steps: laying an air duct pipe at the edge of the bottom of the sludge tank, selecting a plurality of aeration points along the length direction of the air duct pipe according to the deposition distribution of sludge in the sludge tank, forming air holes at the aeration points on the pipe body of the air duct pipe, adding a Roots blower outside the sludge tank, conveying air compressed by the Roots blower into the air duct pipe through a pipeline, and flushing out sludge near the aeration points from the air holes for aeration and stirring.
Further, the compressed air aeration mode further comprises the following steps: and selecting a tee pipe device with adaptive specification to be arranged on the air hole, and switching an outlet branch of the tee pipe device according to the stirring degree of the sludge in the sludge tank to change the direction of the air flow flushed by the compressed air.
Further, the compressed air aeration mode further comprises the following steps: in the process of conveying the compressed air to the air duct pipe, the pressure of the compressed air entering the air duct pipe is changed in a manner of adjusting through a pressure reducing valve according to the deposition degree of sludge in the sludge pond.
Further, the hydraulic impact mode comprises the following steps: the upper overflow clear water in the sludge concentration tank flows back to the sludge tank in a water pump pressure mode, the first hydraulic impact stirring is performed by starting a water source, the first-stage reverse osmosis concentrated drainage is adopted to perform impact stirring on the sludge at the bottom of the sludge tank, and after the first hydraulic impact stirring, the upper overflow clear water in the sludge concentration tank flows back to perform impact stirring.
Further, the method for efficiently recycling the sedimentary sludge further comprises the following steps: and conveying the sludge subjected to double stirring in the sludge tank into a sludge concentration tank in a pumping pressure mode of a sludge lifting pump.
Further, the method for efficiently recycling the sedimentary sludge further comprises the following steps: discharging the lower layer sludge in the sludge concentration tank out of the sludge concentration tank, dehydrating the sludge in the sludge concentration tank by a sludge dehydrator, allowing the dehydrated dry sludge to fall into a dry sludge collection chamber through a sludge bucket, and directly carrying out coal blending and co-firing on the collected dry sludge.
According to a second aspect of the embodiments of the present invention, a recycling system, which employs the method for efficiently recycling sedimented sludge of the present embodiment, includes: the sludge tank is connected with the sludge concentration tank through a sludge conveying pipe, a sludge lifting pump is arranged on the sludge conveying pipe, the compressed air aeration device comprises an air duct pipe, a three-way pipe and a Roots blower, the air duct pipe is laid at the bottom of the sludge tank, a plurality of air holes are formed in the pipe wall of the air duct pipe and face the sludge deposited in the sludge tank, the air duct pipe is connected with the Roots blower through a pipeline, the hydraulic impact device comprises a water pump, a water source and a hydraulic impact pipeline, the water pump is arranged on the hydraulic impact pipeline, one end of the hydraulic impact pipeline is connected into the sludge tank along the opening of the sludge tank, the other end of the hydraulic impact pipeline is connected into the water source, and a branch pipeline is led out from the hydraulic impact pipeline and communicated to the sludge concentration tank, wherein, the top of the sludge concentration tank is provided with an overflow clear water outlet connected with a hydraulic impact pipeline, and the bottom of the sludge concentration tank is provided with a sludge outlet externally connected with sludge treatment equipment.
Furthermore, a tee pipe device is arranged on an air hole of the air duct pipe, and a pressure gauge, a pressure reducing valve and a check valve are respectively arranged on a pipeline connecting the air duct pipe and the Roots blower.
Further, sludge treatment equipment includes sludge dewaterer, bagger and dry sludge collection room, the top of bagger is equipped with the feed inlet to be equipped with the discharge gate in the bottom of bagger, sludge dewaterer sets up the top at the bagger feed inlet, dry sludge collection room sets up the below at the bagger discharge gate.
The embodiment of the invention has the following advantages:
1. in a sludge tank of the seawater pretreatment device, sludge at the bottom of the sludge tank is simultaneously stirred in two modes of compressed air aeration and hydraulic impact, so that the sludge conveying effect is improved, deposited sludge is quickly stirred into slurry to be conveyed and discharged, the deposited sludge generated by the seawater pretreatment device is timely and efficiently transferred and discharged, and the sludge is prevented from generating anaerobic reaction to cause the change of sludge properties and generate harmful substances such as lipids and the like;
2. the sludge conveyed out of the sludge tank is directly conveyed to a sludge concentration tank (not through a pretreatment system of the sewage treatment station) adjacent to an industrial wastewater treatment station in a factory, and the concentrated sludge is dehydrated into dry sludge by a sludge dehydrator and then directly subjected to coal blending and burning, so that the problems of large workload and difficult implementation of manual dredging are solved, energy conservation and environmental protection are realized in a true sense, and economic benefits are brought;
3. the upper overflow clear water in the sludge concentration tank passes through the pipe-line circulation to in the silt pond to strikeing the mud of bottom of the pool perpendicularly downwards, make sewage cycle use when promoting stirring effect, realize the sewage zero release, energy-efficient environmental protection.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.
FIG. 1 is a schematic structural diagram of a compressed air aeration method for efficiently recycling deposited sludge according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a hydraulic impact mode of the method for efficiently recycling sedimentary sludge according to the embodiment of the present invention.
In the figure: 1. a sludge tank; 2. a sludge concentration tank; 3. an air duct pipe; 4. a Roots blower; 5. a three-way pipe device; 6. a pressure reducing valve; 7. a water pump; 8. a sludge lift pump; 9. a sludge dewatering machine; 10. a mud bucket; 11. a dry sludge collection chamber; 12. a sludge conveying pipe; 13. a pressure gauge; 14. a check valve; 15. hydraulically impacting the pipeline.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
As shown in fig. 1 and 2, the invention provides a method for efficiently recycling deposited sludge, which is applied to sludge deposited in a power plant seawater pretreatment device. The method for efficiently recycling the deposited sludge comprises the following steps:
arranging a sludge tank 1 to collect sludge deposited in the power plant seawater pretreatment device;
aerating and stirring the sludge at the bottom of the sludge tank 1 in a compressed air aeration mode, and performing impact stirring in the vertical direction on the sludge at the bottom of the sludge tank 1 in a hydraulic impact mode;
conveying the sludge subjected to double stirring in the sludge tank 1 to a sludge concentration tank 2 of an adjacent plant through a pipeline for concentration, and separating the sludge into upper-layer overflow clear water and lower-layer sludge in the sludge concentration tank 2;
and collecting the dewatered dry sludge of the lower layer of sludge, recycling, simultaneously returning the overflow clear water of the upper layer into the sludge tank 1 through a pipeline, and performing impact stirring on the sludge at the bottom of the sludge tank 1 in a hydraulic impact mode.
As described above, the compressed air aeration method includes: an air duct pipe 3 is laid at the edge of the bottom of the sludge tank 1, and a plurality of aeration points are selected along the length direction of the air duct pipe 3 according to the deposition distribution of sludge in the sludge tank 1, so that air holes are formed at the aeration points on the pipe body of the air duct pipe 3. Meanwhile, a Roots blower 4 is additionally arranged outside the sludge tank 1, air compressed by the Roots blower 4 is conveyed into the air duct pipe 3 through a pipeline, and sludge near an aeration point is aerated and stirred by flushing from an air hole. The air duct pipe 3 with a plurality of air holes is arranged at the bottom of the sludge tank 1 of the seawater pretreatment device to increase the aeration stirring effect, so that the sludge conveying effect is improved, the sludge tank 1 can be continuously and automatically operated or manually controlled to be periodically subjected to aeration stirring, and deposited sludge is quickly stirred into slurry to be conveyed and discharged.
Further, the compressed air aeration mode also comprises the following steps: selecting a tee pipe device 5 with adaptive specification to be arranged on the air hole, and switching an outlet branch of the tee pipe device 5 according to the stirring degree of the sludge in the sludge tank 1 to change the direction of the air flow flushed by the compressed air. By the method, the direction of the airflow rushed out by the compressed air is changed, the aeration and stirring effects on the bottom of the sludge tank 1 are achieved, sludge deposition is prevented, the aeration and stirring effects can be effectively improved, so that the sludge at the bottom of the sludge tank 1 is fully aerated and stirred, and the sludge conveying effect is improved.
The compressed air aeration mode also comprises the following steps: during the process of delivering the compressed air to the air duct pipe 3, the pressure of the compressed air entering the air duct pipe 3 is changed by means of adjustment of the pressure reducing valve 6 according to the degree of deposition of sludge in the sludge tank 1. Preferably, through multiple test comparisons, the pressure setting range is preferably 0.6-0.8MPa, and the cost is saved while the sludge stirring effect is ensured.
Further, the hydraulic impact mode comprises the following steps: the upper overflow clear water in the sludge concentration tank 2 flows back to the sludge tank 1 in a pumping mode through a water pump 7, the first hydraulic impact stirring is that the sludge at the bottom of the sludge tank 1 is impacted and stirred by adopting primary reverse osmosis concentrated drainage through starting a water source, and after the first hydraulic impact stirring, the upper overflow clear water in the sludge concentration tank 2 flows back to be impacted and stirred. Through the mode of addding water conservancy and strikeing, further promote stirring effect to do benefit to mud and carry. And the water source is started for the first time by adopting first-level reverse osmosis concentrated drainage, and the clear water on the upper layer of the sludge concentration tank 2 is subsequently returned to form a recyclable loop, so that the sludge at the bottom of the sludge tank 1 is impacted in a subsequent circulating manner, the sludge conveying effect is improved, and meanwhile, hydraulic resources are saved.
The method for efficiently recycling the deposited sludge further comprises the following steps: the sludge after double stirring in the sludge tank 1 is conveyed into the sludge concentration tank 2 in a pumping mode of a sludge lifting pump 8, so that the slurry directly enters the sludge concentration tank 2 for concentration under the condition of not passing through an industrial wastewater pretreatment system, and the concentrated sludge is separated into upper-layer overflow clear water and lower-layer sludge. The lower layer sludge in the sludge concentration tank 2 is discharged out of the sludge concentration tank 2 and is dehydrated by a sludge dehydrator 9, the dehydrated dry sludge falls into a dry sludge collection chamber 11 through a sludge hopper 10, and the collected dry sludge is directly blended with coal and burnt, so that the dry sludge is recycled, and the energy conservation and environmental protection in the true sense are realized.
One preferred embodiment is: the invention also provides a recycling system, and the deposited sludge high-efficiency recycling method is adopted. The recycling system includes: a sludge tank 1, a sludge concentration tank 2, a compressed air aeration device and a hydraulic impact device. The sludge tank 1 is connected with the sludge concentration tank 2 through a sludge conveying pipe 12, and a sludge lifting pump 8 is arranged on the sludge conveying pipe 12. The compressed air aeration device comprises an air duct pipe 3, a three-way pipe device 5 and a Roots blower 4. The air duct pipe 3 is laid at the bottom of the sludge tank 1, and a plurality of air holes are formed on the pipe wall of the air duct pipe 3, and the air holes face the sludge deposited in the sludge tank 1. The air duct pipe 3 is connected with the Roots blower 4 through a pipeline. Thereby compressing the air through the Roots blower 4, conveying the air into the air duct pipe 3, and flushing the air from the air hole to carry out aeration stirring on the sludge. The three-way pipe device 5 is arranged on the air hole of the air duct pipe 3, and the direction of the airflow rushed out by the compressed air is changed by switching the outlet branch of the three-way pipe device 5, so that the bottom of the sludge tank 1 is aerated and stirred, and the sludge deposition is prevented. In addition, a pressure gauge 13, a pressure reducing valve 6 and a check valve 14 are respectively arranged on a pipeline connecting the air duct pipe 3 and the Roots blower 4. The pressure of the compressed air entering the air duct pipe 3 is changed by the adjusting mode of the pressure reducing valve 6, so that the cost is saved while the sludge stirring effect is ensured.
As mentioned above, the hydraulic impact device comprises a water pump 7, a water source and a hydraulic impact line 15. The water pump 7 is installed on the hydraulic impact pipeline 15, one end of the hydraulic impact pipeline 15 is connected into the sludge tank 1 along the opening of the sludge tank 1, the other end of the hydraulic impact pipeline 15 is connected into a water source, a branch pipeline is led out of the hydraulic impact pipeline 15 and communicated to the sludge concentration tank 2, and the sludge at the bottom of the sludge tank 1 is impacted and stirred in the vertical direction in a hydraulic impact mode. Wherein, the top of the sludge concentration tank 2 is provided with an overflow clear water outlet connected with the hydraulic impact pipeline 15, and the bottom of the sludge concentration tank 2 is provided with a sludge outlet externally connected with sludge treatment equipment, so that the lower layer sludge in the sludge concentration tank 2 is dewatered, collected, treated and reused, and the upper layer overflow clear water flows back to the sludge tank 1 through the hydraulic impact pipeline 15. The sludge treatment apparatus includes a sludge dewatering machine 9, a hopper 10, and a dry sludge collection chamber 11. The top of the hopper 10 is provided with a feed inlet, and the bottom of the hopper 10 is provided with a discharge outlet. The sludge dewatering machine 9 is arranged above the feed inlet of the mud bucket 10, and the dry sludge collection chamber 11 is arranged below the discharge outlet of the mud bucket 10. Therefore, the lower layer sludge concentrated by the sludge concentration tank 2 is discharged into the sludge dewatering machine 9, and falls into the dry sludge collection chamber 11 through the hopper 10 after being dewatered, the collected dry sludge is directly blended with coal for burning, and the energy conservation and environmental protection in the true sense are realized.
The embodiment of the invention has the following advantages:
1. in a sludge tank of the seawater pretreatment device, sludge at the bottom of the sludge tank 1 is simultaneously stirred in two modes of compressed air aeration and hydraulic impact, so that the sludge conveying effect is improved, deposited sludge is quickly stirred into slurry to be conveyed and discharged, the deposited sludge generated by the seawater pretreatment device is timely and efficiently transferred and discharged, and the sludge is prevented from generating anaerobic reaction to change the sludge property and generate harmful substances such as lipids and the like;
2. the sludge conveyed out of the sludge tank 1 is directly conveyed to a sludge concentration tank 2 adjacent to an industrial wastewater treatment station in a factory (without a pretreatment system of the wastewater treatment station), and the concentrated sludge is dehydrated into dry sludge by a sludge dehydrator 9 and then directly subjected to coal blending and burning, so that the problems of large workload and difficult implementation of manual dredging are solved, energy conservation and environmental protection are realized in a true sense, and economic benefits are brought;
3. the upper overflow clear water in the sludge concentration tank 2 circulates to the sludge tank 1 through the pipeline, and vertically impacts the sludge at the bottom of the tank downwards, so that the stirring effect is improved, the sewage is recycled, the zero discharge of the sewage is realized, and the high efficiency, the energy saving and the environmental protection are realized.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The method for efficiently recycling the deposited sludge is applied to the sludge deposited in a power plant seawater pretreatment device, and is characterized by comprising the following steps:
arranging a sludge tank to collect sludge deposited in the power plant seawater pretreatment device;
aerating and stirring the sludge at the bottom of the sludge tank in a compressed air aeration mode, and performing impact stirring in the vertical direction on the sludge at the bottom of the sludge tank in a hydraulic impact mode;
conveying the sludge subjected to double stirring in the sludge tank to a sludge concentration tank of an adjacent plant through a pipeline for concentration, and separating the sludge into upper-layer overflow clear water and lower-layer sludge in the sludge concentration tank;
and collecting the dewatered dry sludge of the lower layer of sludge, recycling the sludge, simultaneously returning the upper layer of overflow clear water to the sludge tank through a pipeline, and performing impact stirring on the sludge at the bottom of the sludge tank in a hydraulic impact mode.
2. The method for efficiently recycling sedimented sludge according to claim 1, wherein the compressed air aeration means comprises: laying an air duct pipe at the edge of the bottom of the sludge tank, selecting a plurality of aeration points along the length direction of the air duct pipe according to the deposition distribution of sludge in the sludge tank, forming air holes at the aeration points on the pipe body of the air duct pipe, adding a Roots blower outside the sludge tank, conveying air compressed by the Roots blower into the air duct pipe through a pipeline, and flushing out sludge near the aeration points from the air holes for aeration and stirring.
3. The method for efficiently recycling sedimented sludge according to claim 2, wherein the compressed air aeration mode further comprises: and selecting a tee pipe device with adaptive specification to be arranged on the air hole, and switching an outlet branch of the tee pipe device according to the stirring degree of the sludge in the sludge tank to change the direction of the air flow flushed by the compressed air.
4. The method for efficiently recycling sedimented sludge according to claim 2, wherein the compressed air aeration mode further comprises: in the process of conveying the compressed air to the air duct pipe, the pressure of the compressed air entering the air duct pipe is changed in a manner of adjusting through a pressure reducing valve according to the deposition degree of sludge in the sludge pond.
5. The method for efficiently recycling sedimented sludge according to claim 1, wherein the hydraulic impact comprises: the upper overflow clear water in the sludge concentration tank flows back to the sludge tank in a water pump pressure mode, the first hydraulic impact stirring is performed by starting a water source, the first-stage reverse osmosis concentrated drainage is adopted to perform impact stirring on the sludge at the bottom of the sludge tank, and after the first hydraulic impact stirring, the upper overflow clear water in the sludge concentration tank flows back to perform impact stirring.
6. The method for efficiently recycling sedimented sludge according to claim 1, wherein the method for efficiently recycling sedimented sludge further comprises: and conveying the sludge subjected to double stirring in the sludge tank into a sludge concentration tank in a pumping pressure mode of a sludge lifting pump.
7. The method for efficiently recycling sedimented sludge according to claim 1, wherein the method for efficiently recycling sedimented sludge further comprises: discharging the lower layer sludge in the sludge concentration tank out of the sludge concentration tank, dehydrating the sludge in the sludge concentration tank by a sludge dehydrator, allowing the dehydrated dry sludge to fall into a dry sludge collection chamber through a sludge bucket, and directly carrying out coal blending and co-firing on the collected dry sludge.
8. A recycling system using the method for efficiently recycling sedimented sludge according to any one of claims 1 to 7, characterized in that: the recycling system includes: the sludge tank is connected with the sludge concentration tank through a sludge conveying pipe, a sludge lifting pump is arranged on the sludge conveying pipe, the compressed air aeration device comprises an air duct pipe, a three-way pipe and a Roots blower, the air duct pipe is laid at the bottom of the sludge tank, a plurality of air holes are formed in the pipe wall of the air duct pipe and face the sludge deposited in the sludge tank, the air duct pipe is connected with the Roots blower through a pipeline, the hydraulic impact device comprises a water pump, a water source and a hydraulic impact pipeline, the water pump is arranged on the hydraulic impact pipeline, one end of the hydraulic impact pipeline is connected into the sludge tank along the opening of the sludge tank, the other end of the hydraulic impact pipeline is connected into the water source, and a branch pipeline is led out from the hydraulic impact pipeline and communicated to the sludge concentration tank, wherein, the top of the sludge concentration tank is provided with an overflow clear water outlet connected with a hydraulic impact pipeline, and the bottom of the sludge concentration tank is provided with a sludge outlet externally connected with sludge treatment equipment.
9. A recycling system according to claim 8, characterized in that: and a tee pipe device is arranged on an air hole of the air duct pipe, and a pressure gauge, a pressure reducing valve and a check valve are respectively arranged on a pipeline connecting the air duct pipe and the Roots blower.
10. A recycling system according to claim 8, characterized in that: sludge treatment equipment includes sludge dewaterer, bagger and dry sludge collection room, the top of bagger is equipped with the feed inlet to be equipped with the discharge gate in the bottom of bagger, sludge dewaterer sets up the top at the bagger feed inlet, dry sludge collection room sets up the below at the bagger discharge gate.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115571939A (en) * | 2022-11-22 | 2023-01-06 | 天津市华博水务有限公司 | Water distribution system of secondary sedimentation tank with functions of circumferential inlet and circumferential outlet |
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| GB1361557A (en) * | 1971-12-11 | 1974-07-24 | Ishikawajima Harima Heavy Ind | Apparatus for handling sludge in liquid tanks of vessels |
| CN202063814U (en) * | 2011-04-27 | 2011-12-07 | 安徽南风环境工程技术有限公司 | Efficient sludge concentrating and dehydrating system |
| CN202490590U (en) * | 2011-12-15 | 2012-10-17 | 上海城投污水处理有限公司桃浦污水处理厂 | Sludge-storing pool air stirrer |
| CN203355681U (en) * | 2013-07-15 | 2013-12-25 | 河北钢铁股份有限公司唐山分公司 | Stable sintering sludge addition device |
| CN203513348U (en) * | 2013-09-23 | 2014-04-02 | 浙江东发环保工程有限公司 | Sludge water treatment and reuse system for settling pond |
| CN203540148U (en) * | 2013-09-23 | 2014-04-16 | 常州东方特钢有限公司 | Sewage pumping and back-flushing device |
| CN210857132U (en) * | 2019-08-19 | 2020-06-26 | 安徽安冉水利工程有限公司 | Sluice bottom plate with device of decontaminating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115571939A (en) * | 2022-11-22 | 2023-01-06 | 天津市华博水务有限公司 | Water distribution system of secondary sedimentation tank with functions of circumferential inlet and circumferential outlet |
| CN115571939B (en) * | 2022-11-22 | 2023-03-10 | 天津市华博水务有限公司 | Water distribution system of secondary sedimentation tank with functions of circumferential inlet and circumferential outlet |
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Application publication date: 20211123 |