CN113860689A - Black and odorous water body sludge treatment process - Google Patents
Black and odorous water body sludge treatment process Download PDFInfo
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- CN113860689A CN113860689A CN202111354911.0A CN202111354911A CN113860689A CN 113860689 A CN113860689 A CN 113860689A CN 202111354911 A CN202111354911 A CN 202111354911A CN 113860689 A CN113860689 A CN 113860689A
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- 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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
Abstract
The invention discloses a black and odorous water body sludge treatment process, which comprises the following steps: pumping sludge and guiding the sludge into a bottom sludge storage pool; introducing the dissolved dry slurry into the bottom mud storage tank, and precipitating after stirring and mixing the dry slurry with the black and odorous sludge in the bottom mud storage tank; pumping the preliminarily precipitated sludge into a concentration and precipitation tank, and simultaneously introducing a flocculating agent and an aluminum chloride solution into the concentration and precipitation tank through different pipelines for mixing; leading the separated water into a clean water tank for recycling or reusing, and leading the mud at the bottom into a mud tank; after the mud in the mud pool is precipitated again, the mud is sent into a belt filter press, and meanwhile, a flocculating agent and an aluminum chloride solution are led into the belt filter press and mixed with the mud in the belt filter press; drying the slurry mixed in the belt filter press by using a belt filter press to form a mud cake, meanwhile, guiding the filtrate in the filtrate of the belt filter press in the drying treatment into a filtrate collecting tank through a pipeline, and guiding the filtrate in the filtrate collecting tank into a concentration settling tank in a pumping mode.
Description
Technical Field
The invention relates to a sludge treatment process, in particular to a black and odorous water body sludge treatment process.
Background
Along with the increasing development of urban scale in China, the number of urban enterprises is continuously increased, the urban water consumption and the discharge amount of production and living sewage are also continuously increased sharply, and due to the fact that rain and sewage are often mixed in a drainage system, sundries are discarded, waste water and waste are discharged illegally, the problems that in some areas, the hidden danger of water environment is large, the water ecology is seriously damaged, the water environment quality is poor and the like are quite prominent, and the current situations seriously influence and damage the quality of the living environment of people. In view of the above, the treatment of the black and odorous sludge is imminent.
At present, the treatment of the black and odorous water sludge mainly comprises the following steps: pumping sludge, separating garbage, concentrating and precipitating, regulating bottom sludge, dewatering and drying to form sludge cakes. In the treatment, the drying treatment is accelerated mainly by regulating and tempering the bottom mud. In the treatment process, the black and odorous water body is precipitated, tempered and then directly dehydrated and dried, the precipitation process is short, the precipitation is not thorough enough, the drying process is mainly accelerated by tempering, the drying process is long, and the water utilization is not sufficient.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a black and odorous water body sludge treatment process with high sludge utilization degree and high treatment efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
a black and odorous water body sludge treatment process is characterized by comprising the following steps: s1, pumping sludge, separating garbage in the sludge, and introducing the sludge into a bottom sludge storage pool; s2, introducing the dissolved dry slurry into the sediment storage tank, and precipitating after stirring and mixing the dry slurry with the black and odorous sludge in the sediment storage tank; s3, pumping the sludge preliminarily precipitated in the step S2 into a concentration and precipitation tank, and introducing a flocculating agent and an aluminum chloride solution into the concentration and precipitation tank through different pipelines to be mixed so as to realize the vertical separation of water and silt; s4, pumping the separated water out and introducing the water into a clean water tank for recycling or for incoming sludge dilution, dry sludge dissolution and filtration and bottom sludge storage tank recycling, and introducing the bottom slurry into a slurry tank; s5, precipitating the slurry in the slurry tank again, feeding the slurry into a belt filter press through a full-automatic identification feed port, and simultaneously, introducing a flocculating agent and an aluminum chloride solution into the full-automatic identification feed port, stirring and mixing the flocculating agent and the aluminum chloride solution, feeding the mixture into the belt filter press, and mixing the mixture with the slurry in the belt filter press; and S6, drying the slurry mixed in the belt filter press by using a belt filter press to form a mud cake, meanwhile, guiding the filtrate in the filtrate of the belt filter press in the drying process into a filtrate collecting tank through a pipeline, and guiding the filtrate in the filtrate collecting tank into a concentration and precipitation tank in a pumping mode. Therefore, after the black and odorous sludge and the dry mud are mixed, the black and odorous sludge is precipitated for a plurality of times and is added with the flocculating agent and the aluminum chloride solution for tempering, the proportion of the sludge in the mud cakes can be effectively reduced by the treatment mode, the harmful ingredients in the mud cakes are effectively reduced, and the utilization rate of the mud cakes is improved. During treatment, the sludge is firstly preliminarily precipitated in a bottom sludge storage tank, is then precipitated for a plurality of times after being tempered in a concentration precipitation tank, and finally enters a belt type filter press to be tempered again and then dried, the sludge subjected to the precipitation treatment for a plurality of times can dilute and take away harmful substances through water, and meanwhile, when the sludge subjected to the precipitation treatment for a plurality of times enters the filter press for drying treatment, particles in the sludge are finer and are dried more easily. Before the drying treatment, the flocculating agent and the aluminum chloride solution are added, so that the drying time can be effectively shortened, and the sludge treatment efficiency is improved. When the sludge is precipitated in the concentration and precipitation tank, the water on the upper part of the precipitated sludge is provided with a flocculating agent and an aluminum chloride solution, and meanwhile, the flocculating agent and the aluminum chloride solution are also provided in the filtrate adopted by the belt filter press during drying treatment.
Further, when pumping the black and odorous water sludge of the pipeline, firstly plugging the indoor pipeline of the inspection well at the working section by using a rubber air bag, flushing sundries and sludge in the pipe into another inspection well by using a high-pressure jet flow vehicle, then repeatedly pumping by using a powerful dirt suction vehicle, pumping the black and odorous water sludge in the inspection well into a vehicle-mounted tank body, and then transporting the sludge to a disposal site for garbage separation; when the sludge in the black and odorous water body in the river channel is sucked, the sludge is dredged to the shore and is conveyed to a disposal site for garbage separation by directly adopting a powerful sludge suction truck winching and sucking mode. Like this, among the pipeline suction process, rubber air bag can effectively pile up silt in the pipeline to the pipeline shutoff, effectively shortens the suction time, and adopts the water under high pressure to erode, can dilute silt, effectively increases the velocity of flow of silt, avoids the silt jam in the suction pipeline. During the river course suction, the soil pick-up car that adopts has mobility, can be according to the continuous antedisplacement of river course silt condition, and the suction is comparatively convenient.
Further, during garbage separation, the black and odorous water sludge is pumped into a mechanical grating machine for sand-stone and garbage separation, and the bottom sludge and the dry sludge slurry after the garbage separation are both led into a bottom sludge storage pool through an obliquely arranged diversion trench; when the bottom mud obtained after the separation of the dry mud and the garbage is led into the bottom mud storage pool, an off-site water source is supplemented into the bottom mud storage pool through the full-automatic identification high-pressure water supplementing equipment. Like this, adopt mechanical grid parts grit, rubbish separation efficiency height, and can not have the omission, the screening is comparatively convenient, swift. Leading-in outside water source in the sediment storage pond can effectively dilute silt.
Further, the flocculant is a polyacrylamide aqueous solution, and is formed by adding polyacrylamide into tap water at the temperature of 5-40 ℃ and stirring and mixing, wherein during mixing, the polyacrylamide is dissolved according to 1-5 per mill, the dissolving time is 60-80 min, and the stirring speed is 200 r/min; and the dissolved polyacrylamide is stored in a flocculant storage pool, a medicament is added into the concentration tank through an automatic identification processor, the cationic polyacrylamide is used within 24 hours after being completely dissolved, and the storage time of the anionic polyacrylamide aqueous solution is less than 7 days. Thus, Polyacrylamide (PAM) is a white powder or small particles, and is a water-soluble high-molecular polymer. The polyacrylamide molecular chains have a certain number of polar groups, can adsorb suspended solid particles in sewage, bridges among the particles or plays a role in neutralization through charges, so that the particles are condensed to form large flocculates, the sedimentation of the particles in the suspended matters is accelerated, and the effects of accelerating the clarification of a solution, promoting the filtration and the like are very obvious. The polyacrylamide aqueous solution mixed by the method is adopted.
Further, the aluminum chloride solution is formed by mixing polyaluminum chloride and normal-temperature tap water, and the concentration of the aluminum chloride solution is 15%; the prepared aluminum chloride solution is stored in a solution storage tank and is added into a concentration precipitation tank and/or a belt filter press through a pipeline mixer. Thus, the aluminum chloride solution mixed by the method can remove harmful minerals in the slurry, purify the slurry and realize recycling.
Furthermore, the mud cake after mud pressing can be generally buried, and can be mixed with coal when the water content is low to be used as combustion auxiliary fuel; or mixing with other materials to prepare building raw materials such as bricks, cement, ceramsite and the like; or greening planting soil for landscape improvement and reconstruction and ecological restoration. Therefore, the mud cake can be reused in various ways, and the use value of the mud cake is improved.
Furthermore, cameras for observing and shooting mud sedimentation conditions are arranged in the bottom mud storage pool, the concentration and sedimentation tank and the mud pool, and are communicated with a control device in a wireless mode; and after the camera transmits the shot picture to the control device, the control device starts a suction pump on the corresponding device to suck the slurry. Like this, the degree of automation that silt was handled can effectively be promoted to camera and the controlling means that sets up, improves silt treatment effeciency.
Furthermore, a water level sensor is arranged at the upper end of the concentration settling tank, the water level sensor is in wireless connection with the control device, the water level condition in the concentration settling tank is fed back to the control device, and the control device is in wireless connection with the clear water suction pump on the concentration settling tank and controls the on-off of the clear water suction pump. Like this, behind the water level sensor who sets up and the controlling means UNICOM, can effectively avoid among each device water too many and excessive, simultaneously, through controlling means control suction pump's switching back, can realize the automation of silt suction.
Drawings
FIG. 1 is a flow chart of a black and odorous water body sludge treatment process in the embodiment.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example (b):
the black and odorous water sludge treatment process provided by the embodiment, as shown in fig. 1, comprises the following steps: s1, pumping sludge, separating garbage in the sludge, and introducing the sludge into a bottom sludge storage pool; s2, introducing the dissolved dry slurry into the sediment storage tank, and precipitating after stirring and mixing the dry slurry with the black and odorous sludge in the sediment storage tank; s3, pumping the sludge preliminarily precipitated in the step S2 into a concentration and precipitation tank, and introducing a flocculating agent and an aluminum chloride solution into the concentration and precipitation tank through different pipelines to be mixed so as to realize the vertical separation of water and silt; s4, pumping the separated water out and guiding the water into a clean water tank for recycling or for diluting incoming sludge, dissolving and filtering dry sludge and recycling the bottom sludge storage tank (after the water in the clean water tank is detected, the water reaching the comprehensive sewage discharge standard is discharged into a municipal pipe network or recycled, and the water not reaching the comprehensive sewage discharge standard is pumped into the bottom sludge storage tank by a flushing water pump for reprocessing or is used for diluting incoming sludge, dissolving and filtering dry sludge, flushing a grid machine and a belt filter press and the like), and guiding the mud at the bottom into a mud slurry tank; s5, precipitating the slurry in the slurry tank again, feeding the slurry into a belt filter press through a full-automatic identification feed port, and simultaneously, introducing a flocculating agent and an aluminum chloride solution into the full-automatic identification feed port, stirring and mixing the flocculating agent and the aluminum chloride solution, feeding the mixture into the belt filter press, and mixing the mixture with the slurry in the belt filter press; and S6, drying the slurry mixed in the belt filter press by using a belt filter press to form a mud cake, meanwhile, guiding the filtrate in the filtrate of the belt filter press in the drying process into a filtrate collecting tank through a pipeline, and guiding the filtrate in the filtrate collecting tank into a concentration and precipitation tank in a pumping mode.
When the sludge in the black and odorous water body of the suction pipeline is sucked, a sectional intercepting mode is mainly adopted, a working section is formed between two inspection wells during construction, after a water inlet pipe orifice of an upstream well chamber and a water outlet pipe orifice of a downstream well chamber are plugged by a rubber air bag in each working section, a high-pressure jet vehicle is used for flushing water into the two sectional inspection wells, a dredger is used for stirring and scraping the sludge in the inspection wells and the sewage pipeline, the sludge is fused with water to be diluted, dredging workers are matched with machinery to stir the sludge continuously until the sludge is completely diluted and is brought into the inspection wells, and then a powerful sewage suction vehicle is used for sucking the sludge in the inspection wells to a water filtration vehicle and transporting the sludge to a disposal site for garbage separation; when the black and odorous water body silt in the suction river channel, the thinner silt is directly sucked by the powerful sewage suction truck, and after the thinner silt is continuously diluted for many times by high-pressure water jet impact, the silt is lifted to the bank and is conveyed to a disposal site for garbage separation.
When garbage is separated, the black and odorous water sludge is pumped into a mechanical grating machine for sand-stone and garbage separation, and the bottom sludge and the dry sludge slurry after the garbage separation are both led into a bottom sludge storage pool through an obliquely arranged diversion trench; when the bottom mud obtained after the separation of the dry mud and the garbage is led into the bottom mud storage pool, an off-site water source is supplemented into the bottom mud storage pool through the full-automatic identification high-pressure water supplementing equipment.
The flocculant is a polyacrylamide aqueous solution, and is formed by adding polyacrylamide into tap water at 5-40 ℃ and stirring and mixing, wherein during mixing, polyacrylamide is dissolved according to 1-5 per mill for 60-80 min at the stirring speed of 200 r/min; and the dissolved polyacrylamide is stored in a flocculant storage pool, a medicament is added into the concentration tank through an automatic identification processor, the cationic polyacrylamide is used within 24 hours after being completely dissolved, and the storage time of the anionic polyacrylamide aqueous solution is less than 7 days.
The aluminum chloride solution is formed by mixing polyaluminum chloride with normal-temperature tap water, and the concentration of the aluminum chloride solution is 15%; the prepared aluminum chloride solution is stored in a solution storage tank and is added into a concentration precipitation tank and/or a belt filter press through a pipeline mixer.
The bottom mud storage pool, the concentration and sedimentation tank and the slurry pool are respectively provided with a camera for observing and shooting the slurry sedimentation condition, and the cameras are communicated with a control device in a wireless mode; and after the camera transmits the shot picture to the control device, the control device starts a suction pump on the corresponding device to suck the slurry.
The upper end of the concentration settling tank is provided with a water level sensor, the water level sensor is wirelessly connected with a control device, the water level condition in the concentration settling tank is fed back to the control device, and the control device is wirelessly connected with a clear water suction pump on the concentration settling tank and controls the on-off of the clear water suction pump.
The surplus water that the belt filter press produced can be used to dilute the silt in the river course in earlier stage, accomplishes cyclic utilization, and the municipal pipe network can directly be discharged into under the condition that satisfies emission standard when the later stage surplus water is greater than the circulation use amount.
After being detected to meet relevant requirements, mud cakes formed after the mud drying treatment are shoveled and transported to a drying yard to be stacked, unqualified mud cakes are dissolved by dry mud dissolving and filtering treatment equipment, then flow into a bottom mud storage tank through a chute again, and are dried again; the mud cakes qualified by inspection can be generally buried, and can be mixed with coal when the water content is low to be used as combustion auxiliary fuel; or mixing with other materials to prepare building raw materials such as bricks, cement, ceramsite and the like; or greening planting soil for landscape improvement and reconstruction and ecological restoration.
The application of the method is beneficial to green construction, energy conservation, water conservation, land conservation and material conservation, accords with the national green environmental protection policy guidance, and is mainly embodied as follows:
firstly, the residual water after pressing mud can be used for diluting silt in pipeline, the river course, accomplishes cyclic utilization, and black and odorous water body can reach the tertiary emission standard of national sewage after handling.
And secondly, the mud cake after the mud drying treatment can be recycled, so that the resources are saved, and the operation cost is reduced.
Thirdly, the operation is simple, the maintenance is easy, and the labor intensity is low. The sewage treatment facility is coordinated with the surrounding environment according to local conditions and small occupied area.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the present invention has been described in detail by referring to the preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention can be made without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (8)
1. A black and odorous water body sludge treatment process is characterized by comprising the following steps: s1, pumping sludge, separating garbage in the sludge, and introducing the sludge into a bottom sludge storage pool; s2, introducing the dissolved dry slurry into the sediment storage tank, and precipitating after stirring and mixing the dry slurry with the black and odorous sludge in the sediment storage tank; s3, pumping the sludge preliminarily precipitated in the step S2 into a concentration and precipitation tank, and introducing a flocculating agent and an aluminum chloride solution into the concentration and precipitation tank through different pipelines to be mixed so as to realize the vertical separation of water and silt; s4, pumping the separated water out and introducing the water into a clean water tank for recycling or for incoming sludge dilution, dry sludge dissolution and filtration and bottom sludge storage tank recycling, and introducing the bottom slurry into a slurry tank; s5, precipitating the slurry in the slurry tank again, feeding the slurry into a belt filter press through a full-automatic identification feed port, and simultaneously, introducing a flocculating agent and an aluminum chloride solution into the full-automatic identification feed port, stirring and mixing the flocculating agent and the aluminum chloride solution, feeding the mixture into the belt filter press, and mixing the mixture with the slurry in the belt filter press; and S6, drying the slurry mixed in the belt filter press by using a belt filter press to form a mud cake, meanwhile, guiding the filtrate in the filtrate of the belt filter press in the drying process into a filtrate collecting tank through a pipeline, and guiding the filtrate in the filtrate collecting tank into a concentration and precipitation tank in a pumping mode.
2. The black and odorous water body sludge treatment process according to claim 1, wherein when the pipeline black and odorous water body sludge is sucked, firstly, the rubber air bag is used for plugging an indoor pipeline of a working section inspection well, then a high-pressure jet vehicle is used for flushing sundries and sludge in the pipeline into another inspection well, then a powerful sewage suction vehicle is used for repeatedly sucking, the black and odorous water body sludge in the inspection well is sucked into a vehicle-mounted tank body, and then the sludge is transported to a disposal site for garbage separation; when the sludge in the black and odorous water body in the river channel is sucked, the sludge is dredged to the shore and is conveyed to a disposal site for garbage separation by directly adopting a powerful sludge suction truck winching and sucking mode.
3. The black and odorous water body sludge treatment process according to claim 1 or 2, wherein during garbage separation, the black and odorous water body sludge is pumped into a mechanical grating machine for sand and stone and garbage separation, and both the bottom sludge and the dry sludge slurry after the garbage separation are guided into a bottom sludge storage tank through an obliquely arranged diversion trench; when the bottom mud obtained after the separation of the dry mud and the garbage is led into the bottom mud storage pool, an off-site water source is supplemented into the bottom mud storage pool through the full-automatic identification high-pressure water supplementing equipment.
4. The black and odorous water body sludge treatment process according to claim 1, wherein the flocculant is a polyacrylamide aqueous solution, and is formed by adding polyacrylamide into tap water at a temperature of 5-40 ℃ and stirring and mixing, wherein during mixing, polyacrylamide is dissolved according to 1-5 per mill, the dissolving time is 60-80 min, and the stirring speed is 200 r/min; and the dissolved polyacrylamide is stored in a flocculant storage pool, a medicament is added into the concentration tank through an automatic identification processor, the cationic polyacrylamide is used within 24 hours after being completely dissolved, and the storage time of the anionic polyacrylamide aqueous solution is less than 7 days.
5. The black and odorous water body sludge treatment process according to claim 1, wherein the aluminum chloride solution is formed by mixing polyaluminum chloride and normal-temperature tap water, and the concentration of the aluminum chloride solution is 15%; the prepared aluminum chloride solution is stored in a solution storage tank and is added into a concentration precipitation tank and/or a belt filter press through a pipeline mixer.
6. The black and odorous water body sludge treatment process according to claim 1, 2, 4 or 5, wherein the mud cake after mud pressing can be generally treated in a landfill, and can be mixed with coal as a combustion auxiliary fuel when the water content is low; or mixing with other materials to prepare building raw materials such as bricks, cement, ceramsite and the like; or greening planting soil for landscape improvement and reconstruction and ecological restoration.
7. The black and odorous water body sludge treatment process according to claim 6, wherein a camera for observing and shooting sludge sedimentation conditions is arranged in each of the bottom sludge storage tank, the concentration sedimentation tank and the slurry tank, and the camera is communicated with a control device in a wireless manner; and after the camera transmits the shot picture to the control device, the control device starts a suction pump on the corresponding device to suck the slurry.
8. The black and odorous water body sludge treatment process according to claim 7, wherein a water level sensor is arranged at the upper end of the concentration and sedimentation tank, the water level sensor is wirelessly connected with a control device and feeds back the water level condition in the concentration and sedimentation tank to the control device, and the control device is wirelessly connected with a clean water suction pump on the concentration and sedimentation tank and controls the clean water suction pump to be opened and closed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115286082A (en) * | 2022-07-12 | 2022-11-04 | 长沙环境保护职业技术学院 | Separation device suitable for removing silt in activated sludge of sewage treatment plant |
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