CN212174752U - Municipal sludge resourceful treatment system based on source decrement - Google Patents
Municipal sludge resourceful treatment system based on source decrement Download PDFInfo
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- CN212174752U CN212174752U CN201921957971.XU CN201921957971U CN212174752U CN 212174752 U CN212174752 U CN 212174752U CN 201921957971 U CN201921957971 U CN 201921957971U CN 212174752 U CN212174752 U CN 212174752U
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Abstract
The utility model discloses a municipal sludge resourceful treatment system based on source decrement, including sludge regulating reservoir, biological pond, two heavy ponds, enrichment facility, clean water basin, dewatering device, mummification device, carbonization device and aftertreatment pond. The utility model has the advantages as follows: 1) the tail end treatment of the sludge is turned to 'source control', the generation of the sludge is fundamentally reduced, the treatment cost of the sludge is reduced, the sludge reduction is simultaneously carried out in the sewage treatment process, and the treatment efficiency of the sewage and the sludge is improved; 2) carbonization treatment can reduce volatile organic compounds in the mud among the entire system to heavy metal in the mud is fixed, reduces the heavy metal pollution risk among the follow-up utilization of resources in-process, compares conventional sludge incineration technique, the utility model discloses a carry out resource recovery and utilization to the energy of the less multistage processing mode of environmental impact in with mud, have spreading value.
Description
Technical Field
The utility model belongs to the technical field of sludge treatment, concretely relates to municipal sludge resourceful treatment system based on source decrement.
Background
With the acceleration of the industrialization process and the rapid expansion of the urban scale, the discharge amount of industrial sewage is continuously increased, and the quality of inlet water exceeds the original design standard of a sewage treatment plant, so that the sewage treatment plant needs to be reconstructed and expanded. Sewage treatment plants can form a large amount of sludge, and long-term storage can seriously affect the surrounding atmospheric environment, so that harmless and even resource treatment is required.
The traditional sludge treatment methods comprise a sanitary landfill method, a burning method, a sludge direct brick making method, an aerobic fermentation composting method, a direct solidification method and the like. The sanitary landfill method has the risk of secondary pollution. The burning method has large investment and can generate dioxin and other highly toxic substances during burning. The sludge can generate foul gas and toxic and harmful gas in the process of directly making bricks. In the aerobic fermentation composting method, high-temperature composting treatment needs to be carried out on sludge before the fertilizer is prepared, subsequent treatment equipment such as a pile turning machine needs to be added, and a larger field needs to be provided. The direct curing method is easy to form odor, which causes pollution to the atmospheric environment. The traditional treatment technologies not only have the problems of insufficient treatment capacity, high treatment cost, easy secondary pollution and the like, but also neglect the reutilization of resources in the sludge and cause great waste of the resources.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a municipal sludge resourceful treatment system based on source decrement to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a municipal sludge resourceful treatment system based on source decrement which the structural feature lies in: comprises a sludge regulating tank, a biological tank, a secondary sedimentation tank, a concentration device, a clean water tank, a dehydration device, a drying device, a carbonization device and a post-treatment tank, wherein the output end of the sludge regulating tank is communicated with the input end of the biological tank through a pipeline, the output end of the biological tank is communicated with the input end of the secondary sedimentation tank through a pipeline, the secondary sedimentation tank is provided with an upper clear liquid outlet and a lower sludge outlet, the upper clear liquid outlet is communicated with the inlet of the clean water tank through a pipeline, the lower sludge outlet is communicated with the input end of the concentration device through a pipeline, the concentration device is provided with a concentrated liquid outlet and a concentrated sludge outlet, the concentrated liquid outlet is communicated with the inlet of the clean water tank through a pipeline, the concentrated sludge outlet is communicated with the input end of the dehydration device through a pipeline, the output end of the dehydration device is communicated with the input end of the, the output end of the carbonization device is communicated with the post-treatment tank through a pipeline.
Preferably, the sludge adjusting tank is provided with a sludge input port and a potassium hydroxide input port.
Preferably, the concentration device is a thickener.
Preferably, a cationic polyelectrolyte flocculating agent is arranged in the concentration device, and the cationic polyelectrolyte flocculating agent comprises one or more of cationic polyacrylamide, polyaluminium chloride and polyferric sulfate.
Preferably, the dewatering device is a plate and frame filter press or a membrane filter press.
Preferably, the carbonization device is a low-temperature cracking furnace, a high-temperature cracking furnace, a hydrothermal carbonization device or a microwave hydrothermal carbonization device.
Preferably, the post-treatment tank comprises a first treatment tank and a second treatment tank, wherein the input end of the first treatment tank and the input end of the second treatment tank are respectively communicated with the output end of the carbonization device through pipelines, the first treatment tank is provided with a natural soil input port, and the second treatment tank is provided with a fly ash input port.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1) the tail end treatment of the sludge is turned to 'source control', the generation of the sludge is fundamentally reduced, the treatment cost of the sludge is reduced, the sludge reduction is simultaneously carried out in the sewage treatment process, and the treatment efficiency of the sewage and the sludge is improved.
2) Carbonization treatment can reduce volatile organic compounds in the mud among the entire system to heavy metal in the mud is fixed, reduces the heavy metal pollution risk among the follow-up utilization of resources in-process, compares conventional sludge incineration technique, the utility model discloses a carry out resource recovery and utilization to the energy of the less multistage processing mode of environmental impact in with mud, have spreading value.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1-sludge adjusting tank, 11-sludge input port, 12-potassium hydroxide input port, 2-biological tank, 3-secondary sedimentation tank, 31-supernatant outlet, 32-lower sludge outlet, 4-concentration device, 41-concentrated solution outlet, 42-concentrated sludge outlet, 5-clear water tank, 6-dehydration device, 7-drying device, 8-carbonization device, 9-post-treatment tank, 91-first treatment tank, 911-natural soil input port, 92-second treatment tank, and 921-fly ash input port.
Detailed Description
The invention is further explained with reference to the drawings, without limiting the scope of protection of the invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, the utility model provides a technical scheme, a municipal sludge resource treatment system based on source reduction, which comprises a sludge adjusting tank 1, a biological tank 2, a secondary sedimentation tank 3, a concentration device 4, a clean water tank 5, a dehydration device 6, a drying device 7, a carbonization device 8 and a post-treatment tank 9, wherein the output end of the sludge adjusting tank 1 is communicated with the input end of the biological tank 2 through a pipeline, the output end of the biological tank 2 is communicated with the input end of the secondary sedimentation tank 3 through a pipeline, the secondary sedimentation tank 3 is provided with an upper clear liquid outlet 31 and a lower sludge outlet 32, the upper clear liquid outlet 31 is communicated with the inlet of the clean water tank 5 through a pipeline, the lower sludge outlet 32 is communicated with the input end of the concentration device 4 through a pipeline, the concentration device 4 is provided with a concentrated liquid outlet 41 and a concentrated sludge outlet 42, the concentrated solution outlet 41 is communicated with the inlet of the clean water tank 5 through a pipeline, the concentrated sludge outlet 42 is communicated with the input end of the dewatering device 6 through a pipeline, the output end of the dewatering device 6 is communicated with the input end of the drying device 7 through a pipeline, the output end of the drying device 7 is communicated with the input end of the carbonizing device 8 through a pipeline, and the output end of the carbonizing device 8 is communicated with the post-treatment tank 9 through a pipeline.
In the embodiment, the sludge conditioning tank 1 is provided with a sludge input port 11 and a potassium hydroxide input port 12.
In the present embodiment, the concentration device 4 is a concentrator.
In this embodiment, a cationic polyelectrolyte flocculant is disposed in the concentration device 4, and the cationic polyelectrolyte flocculant includes one or more of cationic polyacrylamide, polyaluminium chloride, and polyferric sulfate.
In the present embodiment, the dewatering device 6 is a plate and frame filter press or a membrane filter press.
In this embodiment, the carbonization device 8 is a low-temperature cracking furnace, a high-temperature cracking furnace, a hydrothermal carbonization device, or a microwave hydrothermal carbonization device.
In this embodiment, the post-treatment tank 9 includes a first treatment tank 91 and a second treatment tank 92, wherein an input end of the first treatment tank 91 and an input end of the second treatment tank 92 are respectively communicated with an output end of the carbonization device 8 through a pipeline, the first treatment tank 91 is provided with a natural soil input port 911, and the second treatment tank 92 is provided with a fly ash input port 921.
The treatment process comprises the following steps:
step S1: sludge acidity adjustment: mixing and stirring the water-containing sludge and potassium hydroxide to obtain sludge slurry with the pH value of 8-10;
step S2: and (3) treating the microorganisms: sludge is consumed through the self metabolism of microorganisms and among the microorganisms in the biological pond to obtain reduced sludge, and the reduction rate reaches 15-25%;
step S3: separation treatment: separating the reduced sludge into upper clear liquid and lower sludge through a secondary sedimentation tank 3, wherein the upper clear liquid enters a clear water tank 5, and the lower sludge enters a concentration device 4, so that the reduction rate reaches 30-35%;
step S4: concentration: adding a cationic polyelectrolyte flocculant into a concentration device 4 filled with lower-layer sludge, concentrating by the concentration device 4 to obtain concentrated solution and concentrated sludge, feeding the concentrated solution into a clean water tank 5, and feeding the concentrated sludge into a dewatering device 6, so that the water content of the concentrated sludge is from 99% to 95-97%, and although the water content is reduced to a minimum, the main effect of the step is to concentrate the sludge and reduce the volume of subsequent treatment equipment;
step S5: and (3) dehydrating: the method comprises the following steps of mixing and stirring the concentrated sludge and a conditioner, and dehydrating through a dehydrating device 6 to obtain dehydrated sludge, so that the water content of the dehydrated sludge is reduced to 50-60%, deep dehydration is realized, most of capillary water and gap water in the concentrated sludge can be removed, and the dehydrated sludge is solid at the moment and is convenient for transmission of subsequent drying treatment;
step S6: drying: continuously removing water in the dehydrated sludge cells by using a drying device 7 to obtain dried sludge, so that the water content of the dried sludge is reduced to 30%, wherein the drying device 7 adopts drying technologies such as direct heating or indirect heating or thermal radiation heating;
step S7: carbonizing: removing components with strong volatility in the dried sludge through a carbonization device 8 to obtain carbonized sludge, so that the final water content of the carbonized sludge is not higher than 10%, the ignition loss of organic matters at 550 ℃ is less than 5%, the heavy metal content is controlled within the national standard range of land utilization, and the stability of the treated sludge is ensured;
step S8: manufacturing a roadbed material: uniformly mixing the carbonized sludge and the natural soil to obtain a roadbed material;
step S9: preparing a soil conditioner: and uniformly mixing the carbonized sludge and the fly ash to obtain the soil conditioner.
The utility model has the advantages as follows:
1) the tail end treatment of the sludge is turned to 'source control', the generation of the sludge is fundamentally reduced, the treatment cost of the sludge is reduced, the sludge reduction is simultaneously carried out in the sewage treatment process, and the treatment efficiency of the sewage and the sludge is improved.
2) The method develops a suitable resource (used as a soil conditioner and a roadbed material) approach from the characteristic of sludge property in China, and can well solve the technical bottleneck of sludge disposal at the present stage.
3) Carbonization treatment can reduce volatile organic compounds in the mud among the entire system to heavy metal in the mud is fixed, reduces the heavy metal pollution risk among the follow-up utilization of resources in-process, compares conventional sludge incineration technique, the utility model discloses a carry out resource recovery and utilization to the energy of the less multistage processing mode of environmental impact in with mud, have spreading value.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides a municipal sludge resourceful treatment system based on source decrement which characterized in that: comprises a sludge adjusting tank, a biological tank, a secondary sedimentation tank, a concentration device, a clean water tank, a dehydration device, a drying device, a carbonization device and a post-treatment tank, wherein the output end of the sludge adjusting tank is communicated with the input end of the biological tank through a pipeline, the output end of the biological tank is communicated with the input end of the secondary sedimentation tank through a pipeline, the secondary sedimentation tank is provided with an upper clear liquid outlet and a lower sludge outlet, the upper clear liquid outlet is communicated with the inlet of the clean water tank through a pipeline, the lower sludge outlet is communicated with the input end of the concentration device through a pipeline, the concentration device is provided with a concentrated liquid outlet and a concentrated sludge outlet, the concentrated liquid outlet is communicated with the inlet of the clean water tank through a pipeline, the concentrated sludge outlet is communicated with the input end of the dehydration device through a pipeline, the output end of the dehydration device is communicated with the input end of the drying device through a pipeline, the output end of the drying device is communicated with the input end of the carbonization device through a pipeline, and the output end of the carbonization device is communicated with the post-treatment tank through a pipeline.
2. The source reduction-based municipal sludge recycling system according to claim 1, wherein: the sludge adjusting tank is provided with a sludge input port and a potassium hydroxide input port.
3. The source reduction-based municipal sludge recycling system according to claim 1, wherein: the concentration device is a concentrator.
4. The source reduction-based municipal sludge recycling system according to claim 1, wherein: the concentration device is internally provided with a cationic polyelectrolyte flocculant.
5. The source reduction-based municipal sludge recycling system according to claim 1, wherein: the dewatering device is a plate-and-frame filter press or a diaphragm filter press.
6. The source reduction-based municipal sludge recycling system according to claim 1, wherein: the carbonization device is a low-temperature cracking furnace or a high-temperature cracking furnace or a hydrothermal carbonization device or a microwave hydrothermal carbonization device.
7. The source reduction-based municipal sludge recycling system according to claim 1, wherein: the post-treatment pool comprises a first treatment pool and a second treatment pool, wherein the input end of the first treatment pool and the input end of the second treatment pool are respectively communicated with the output end of the carbonization device through pipelines, the first treatment pool is provided with a natural soil input port, and the second treatment pool is provided with a fly ash input port.
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| CN201921957971.XU CN212174752U (en) | 2019-11-13 | 2019-11-13 | Municipal sludge resourceful treatment system based on source decrement |
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| CN201921957971.XU CN212174752U (en) | 2019-11-13 | 2019-11-13 | Municipal sludge resourceful treatment system based on source decrement |
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