CN113292215A - Residual sludge treatment device and method combining microbubble ozonation and thin-layer drying - Google Patents
Residual sludge treatment device and method combining microbubble ozonation and thin-layer drying Download PDFInfo
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- CN113292215A CN113292215A CN202110713765.XA CN202110713765A CN113292215A CN 113292215 A CN113292215 A CN 113292215A CN 202110713765 A CN202110713765 A CN 202110713765A CN 113292215 A CN113292215 A CN 113292215A
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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
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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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
- C02F11/02—Biological treatment
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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
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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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
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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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
- C02F11/14—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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Abstract
The invention discloses a residual sludge treatment device and method combining microbubble ozonation and thin-layer drying, wherein the device comprises: the sludge reaction tank (1) is used for circularly reacting residual sludge entering the sludge reaction tank (1) with ozone gas microbubbles and then sending the residual sludge into the pre-conditioning tank (4); the pre-conditioning pool (4) is used for pre-treating the sludge treated by the sludge reaction tank (1) and feeding the pre-treated sludge into the conditioning pool (5); the conditioning tank (5) is used for conditioning the sludge entering the conditioning tank (5) by using a flocculating agent to form concentrated sludge; the plate and frame filter press (7) is used for dehydrating the sludge entering the plate and frame filter press (7) and sending the dehydrated sludge into a thin layer drier (9) for thin layer drying; and the thin layer drier (9) is used for carrying out thin layer drying on the sludge fed by the plate-and-frame filter press (7) by utilizing hot water vapor.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a residual sludge treatment device and method combining microbubble ozonation and thin-layer drying.
Background
With the continuous progress of the social economy and the industrial production level in China, the sewage treatment scale is continuously increased, the output of excess sludge is further increased, but the sludge treatment at present has more defects. The common treatment processes at present are concentration, dehydration and digestion, and the treatment method has the disadvantages of complicated process and high treatment cost. The sludge thin-layer drying is a novel mechanical sludge dewatering mode, the moisture content of the sludge can be reduced to below 50%, but the sludge is lack of pretreatment measures for stabilizing and reducing the sludge, so that the sludge resource utilization degree is low.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a residual sludge treatment device and method combining microbubble ozonation and thin-layer drying.
In order to achieve the above object, the present invention provides a residual sludge treatment apparatus combining microbubble ozonation and thin layer drying, comprising:
the sludge reaction tank (1) is used for circularly reacting residual sludge entering the sludge reaction tank (1) with ozone gas microbubbles and then sending the residual sludge into the pre-conditioning tank (4);
the pre-conditioning pool (4) is used for pre-treating the sludge treated by the sludge reaction tank (1) and feeding the pre-treated sludge into the conditioning pool (5);
the conditioning tank (5) is used for conditioning the sludge entering the conditioning tank (5) by using a flocculating agent to form concentrated sludge;
the plate and frame filter press (7) is used for dehydrating the sludge entering the plate and frame filter press (7) and sending the dehydrated sludge into a thin layer drier (9) for thin layer drying;
and the thin layer drier (9) is used for carrying out thin layer drying on the hot water steam generated by the steam generating device by utilizing the sludge fed by the plate-and-frame filter press (7).
Preferably, excess sludge treatment device still includes microbubble generator (2), circulating pump (12), microbubble generator (2) one side is connected with sludge reaction jar (1) through return line, and the opposite side is connected with circulating pump (12) through return line, and circulating pump (12) opposite side passes through gas line and links to each other with sludge reaction jar (1).
Preferably, the excess sludge treatment device further comprises an ozone generator (3), one side of the ozone generator (3) is connected with the microbubble generator (2) through a gas pipeline, and the other side of the ozone generator is connected with an oxygen source through a gas pipeline.
Preferably, tail gas generated after ozone aeration in the sludge reaction tank (1) is finished enters a biochemical tank through a gas pipeline for aeration, and supernatant generated after sludge-water separation of residual sludge is returned to the biochemical tank through a pipeline.
Preferably, the sludge with the water content of about 97 percent after being pretreated in the pretreatment tank (4) is sent to the conditioning tank (5), and the supernatant after the sludge-water separation is returned to the biochemical tank through a pipeline.
Preferably, the thin layer drier (9) is connected with a steam generating device (8) through a gas pipeline, the steam generating device (8) supplies hot water steam to the thin layer drier (9) through a pipeline, in the thin layer drier (9), the hot water steam is used for heating and drying, and supernatant treated by the thin layer drier (9) returns to the biochemical pool through the pipeline.
Preferably, the excess sludge treatment device further comprises a condenser (6), one side of the condenser is connected with the thin layer drier (9) through a gas pipeline, and water vapor generated by the thin layer drier (9) is condensed by the condenser (6) to form condensed water which is sent to the biochemical tank.
In order to achieve the above purpose, the invention also provides a residual sludge treatment method combining microbubble ozonation and thin-layer drying, which comprises the following steps:
step S1, the residual sludge entering the sludge reaction tank (1) is sent into a pre-conditioning pool (4) after being circularly reacted with ozone gas microbubbles by ozone gas microbubbles;
step S2, pretreating the sludge treated by the sludge reaction tank (1) by using the pretreatment tank (4), and feeding the pretreated sludge into a conditioning tank (5);
s3, conditioning sludge entering the conditioning pool (5) by using a flocculating agent in the conditioning pool (5) to form concentrated sludge, and sending the concentrated sludge to a plate-and-frame filter press (7);
step S4, dehydrating the sludge entering the plate-and-frame filter press, and sending the dehydrated sludge into a thin-layer drier (9) for thin-layer drying;
and step S5, carrying out thin-layer drying on the sludge fed by the plate-and-frame filter press (7) in the thin-layer drying machine (9) by using hot water vapor.
Preferably, in step S1, the excess sludge with a water content of about 99-99.5% is introduced into the sludge reaction tank (1), and is allowed to stay in the sludge reaction tank (1) for 2-3h, and then is continuously subjected to ozone aeration by a micro bubble generator (2), so that the excess sludge in the sludge reaction tank (1) is subjected to sludge-water separation.
Compared with the prior art, the invention has the following beneficial effects:
the method and the device return the supernatant in the sludge reaction tank, the pre-conditioning tank, the conditioning tank and the plate-and-frame filter press to the biochemical tank, so that the resource utilization rate of the sludge is improved.
Secondly, the invention takes ozone microbubble oxidation as a pretreatment process of thin-layer drying, wall breaking is carried out on sludge cells to dissolve the sludge cells, and drying performance of sludge is improved.
The invention utilizes the microbubble generator to carry out ozone aeration, improves the ozone utilization rate, and ensures that the ozone and the sludge fully react.
Drawings
FIG. 1 is a schematic diagram of an excess sludge treatment apparatus combining microbubble ozonation and thin layer drying according to the present invention;
FIG. 2 is a sludge recycling flow chart of the excess sludge treatment device combining ozone oxidation and thin-layer drying of excess sludge according to the present invention;
FIG. 3 is a flow chart of the steps of a combined microbubble ozonation and thin layer drying excess sludge treatment method of the present invention;
fig. 4 is an application environment layout diagram of the excess sludge treatment device combining microbubble ozonation and thin layer drying in the embodiment of the invention.
Detailed Description
Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the present disclosure by describing the embodiments of the present invention with specific embodiments thereof in conjunction with the accompanying drawings. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.
Ozone is a gas with strong oxidizing property, and can kill organisms by destroying cell walls of microorganisms, so that intracellular substances are dissolved out. Therefore, the invention takes the ozone process as a pretreatment method of the thin layer drying technology, releases proteoglycan in the sludge through the ozone cracking and lysis technology, and can realize the stabilization of the sludge; meanwhile, the invention also returns the supernatant or the cracked sludge to a biochemical system, and realizes the reduction of the sludge through recessive growth.
FIG. 1 is a schematic diagram of an excess sludge treatment apparatus combining microbubble ozonation and thin layer drying according to the present invention. As shown in fig. 1, the excess sludge treatment device combining microbubble ozonation and thin layer drying of the present invention comprises:
one side of the sludge reaction tank 1 is connected with a sludge inlet pipe of excess sludge, the other side of the sludge reaction tank is connected with the preconditioning tank 4, and the excess sludge entering the sludge reaction tank 1 in the sludge reaction tank 1 is circularly reacted with ozone gas microbubbles and then is sent into the preconditioning tank 4.
In the embodiment of the invention, the sludge reaction tank 1 is connected with the micro bubble generator 2 and the circulating pump 12 through the return pipeline, ozone gas micro bubbles generated by the micro bubble generator 2 and excess sludge are continuously and circularly sent into the sludge reaction tank 1 by the circulating pump 12 in the reaction process, specifically, one side of the micro bubble generator 2 is connected with the sludge reaction tank 1 through the return pipeline, the other side of the circulating pump 12 is connected with the sludge reaction tank 1 through the gas pipeline, the circulating pump 12 continuously and circularly pumps the excess sludge entering the sludge reaction tank 1, sends the excess sludge into the micro bubble generator 2 to be mixed with ozone gas generated by the micro bubble generator 2 to be sent into the sludge reaction tank 1, ozone gas used by the micro bubble generator 7 is generated by oxidizing oxygen in the ozone generator 3, specifically, one side of the ozone generator 3 is connected with the micro-bubble generator 2 through a gas pipeline, and the other side of the ozone generator is connected with an oxygen source through a gas pipeline.
Specifically, excess sludge with the water content of about 99-99.5% is introduced into the sludge reaction tank 1 through a sludge inlet pipe on one side of the sludge reaction tank 1, stays in the sludge reaction tank 1 for 2-3 hours, then is continuously subjected to ozone aeration through the microbubble generator 2, preferably, the mass ratio of the ozone addition amount to the sludge is about 1: 800-1: 400, so that sludge-water separation of the excess sludge in the sludge reaction tank 1 is realized, and the separated sludge is sent to the pre-conditioning tank 4.
Preferably, after the ozone aeration in the sludge reaction tank 1 is finished, the generated tail gas enters the biochemical tank through the gas pipeline for aeration, the residual sludge in the sludge reaction tank 1 is subjected to sludge-water separation, and the supernatant is returned to the biochemical tank 10 through the pipeline, as shown in fig. 2, the sludge enters the sedimentation tank (11) after being subjected to biochemical treatment in the biochemical tank (10), and the residual sludge after being treated by the sedimentation tank (11) enters the sludge reaction tank (1).
And one side of the pre-conditioning tank 4 is connected with the sludge reaction tank 1 through a pipeline, and the other side of the pre-conditioning tank is connected with the conditioning tank 5 through a pipeline, and is used for pre-treating the sludge treated by the sludge reaction tank 1 and enabling the pre-treated sludge to enter the conditioning tank 5.
In the embodiment of the invention, the pre-conditioning tank 4 is also connected with the biochemical tank through a pipeline, and the sludge treated by the ozone aeration of the sludge reaction tank 1 enters the pre-conditioning tank 4 through the pipeline and can be elutriated by using the effluent of the biochemical tank. And after elutriation is finished, sludge and water are separated, supernatant liquid returns to the biochemical tank through a pipeline, and the sludge subjected to preconditioning enters the conditioning tank 5 through the pipeline.
And the conditioning pool 5 is connected with the pre-conditioning pool 4 through a pipeline on one side, and connected with the plate-and-frame filter press 7 through a pipeline on the other side, and is used for conditioning sludge entering the conditioning pool 5 by using a flocculating agent to form concentrated sludge.
Specifically, the pre-conditioned sludge enters a conditioning tank through a pipeline, a flocculating agent is added for conditioning, after the conditioning is finished, sludge and water are separated, the formed concentrated sludge enters a plate-and-frame filter press 7 through a pipeline, the generated supernatant returns to a biochemical tank through a pipeline, and the flocculating agent can be PAC (polyaluminium chloride) or PAM (polyacrylamide), or PAM.
And one side of the plate-and-frame filter press 7 is connected with the conditioning tank 5 through a pipeline, and the other side of the plate-and-frame filter press is connected with the thin layer drier through a pipeline, and is used for dehydrating sludge entering the plate-and-frame filter press and sending the dehydrated sludge into the thin layer drier 9 for thin layer drying.
In the embodiment of the invention, the conditioned sludge enters the plate-and-frame filter press 7 through a pipeline, the sludge is dehydrated in the plate-and-frame filter press 7, and the generated compressed liquid returns to the biochemical pool through a pipeline. And the sludge discharged from the plate-and-frame filter press 7 enters a thin layer drier 9 to be subjected to thin layer drying by using hot water vapor.
And one side of the thin layer drying machine 9 is connected with the plate-and-frame filter press through a pipeline and is used for carrying out thin layer drying on the sludge fed by the plate-and-frame filter press 7 by using hot water vapor generated by the steam generating device.
In the embodiment of the invention, hot water vapor generated by a steam generating device 8 enters a thin layer drier 9 to dehydrate sludge entering the thin layer drier 9, the sludge dehydrated by the thin layer drier 9 is discharged from a sludge outlet and then transported outwards, preferably, the residual sludge treatment device further comprises a condenser 6, one side of the condenser is connected with the thin layer drier 9 through a gas pipeline, the water vapor discharged from the thin layer drier 9 is condensed by the condenser 6 to form condensed water and then is sent into a biochemical pool, and meanwhile, supernatant liquid treated by the thin layer drier 9 returns to the biochemical pool through a pipeline. In the embodiment of the present invention, the steam generating device 8 may be a hot water boiler, one side of which uses natural gas, electricity and steam as energy sources, and the other side of which supplies hot water to the thin layer drying machine 9 through a pipeline.
FIG. 3 is a flow chart of the steps of a method for treating excess sludge by combining microbubble ozonation and thin-layer drying according to the present invention. As shown in fig. 3, the method for treating excess sludge by combining microbubble ozonation and thin-layer drying comprises the following steps:
step S1, the excess sludge entering the sludge reaction tank 1 is sent to the pre-conditioning tank 4 after being circularly reacted with the ozone gas microbubbles.
In the embodiment of the invention, one side of a sludge reaction tank 1 is connected with a sludge inlet pipe of excess sludge, the other side is connected with a preconditioning tank 4, the sludge reaction tank 1 is connected with a micro bubble generator 2 and a circulating pump 12 through a return pipeline, ozone gas micro bubbles generated by the micro bubble generator 2 and circulating excess sludge are continuously sent into the sludge reaction tank 1 together by the circulating pump 12 in the reaction process, specifically, one side of the micro bubble generator 2 is connected with the sludge reaction tank 1 through the return pipeline, the other side of the micro bubble generator is connected with the circulating pump 12 through the return pipeline, the other side of the circulating pump 12 is connected with an ozone generator through a gas pipeline, the circulating pump 12 continuously and circularly extracts the excess sludge entering the sludge reaction tank 1, the excess sludge is sent into the sludge reaction tank 1 after being sent into the micro bubble generator 2 to be mixed with the ozone gas generated by the micro bubble generator 2, and the ozone gas used by the micro bubble generator 7 is generated by oxidizing oxygen in an ozone generator 8 Specifically, one side of the ozone generator 3 is connected with the microbubble generator 2 through a gas pipeline, and the other side is connected with an oxygen source through a gas pipeline.
Specifically, excess sludge with the water content of 99-99.5% is introduced into the sludge reaction tank 1 through a sludge inlet pipe on one side of the sludge reaction tank 1, the excess sludge stays in the sludge reaction tank 1 for 2-3 hours, then ozone aeration is continuously carried out through the microbubble generator 2, the mass ratio of the ozone adding amount to the sludge ranges from 1:800 to 1:400, so that sludge-water separation of the excess sludge in the sludge reaction tank 1 is realized, and the separated sludge is sent to the pre-conditioning tank 4.
Preferably, after the ozone aeration in the sludge reaction tank 1 is finished, the generated tail gas enters the biochemical tank through the gas pipeline for aeration, and after the sludge and water in the residual sludge in the sludge reaction tank 1 are separated, the supernatant is returned to the biochemical tank through the pipeline.
And step S2, pretreating the sludge treated by the sludge reaction tank 1 by using the pretreatment tank 4, and feeding the pretreated sludge into the conditioning tank 5.
In the embodiment of the invention, one side of the pre-conditioning tank 4 is connected with the sludge reaction tank 1 through a pipeline, the other side of the pre-conditioning tank is connected with the conditioning tank 5 through a pipeline, the pre-conditioning tank 4 is also connected with the biochemical tank through a pipeline, and the sludge treated by ozone aeration of the sludge reaction tank 1 enters the pre-conditioning tank 4 through a pipeline and can be elutriated by using the effluent of the biochemical tank. And after elutriation is finished, sludge and water are separated, supernatant liquid returns to the biochemical tank through a pipeline, and the sludge subjected to preconditioning enters the conditioning tank 5 through the pipeline.
And step S3, conditioning the sludge entering the conditioning pool 3 in the conditioning pool 5 by using a flocculating agent to form concentrated sludge, and sending the concentrated sludge to the plate-and-frame filter press 7.
Specifically, one side of a conditioning pool 5 is connected with a pre-conditioning pool 4 through a pipeline, the other side of the conditioning pool is connected with a plate and frame filter press 7 through a pipeline, sludge with the pre-conditioned water content of about 97% enters the conditioning pool through a pipeline and then is conditioned by adding a flocculating agent, after the conditioning is finished, sludge is subjected to mud-water separation, the formed concentrated sludge enters the plate and frame filter press 7 through a pipeline, the generated supernatant returns to a biochemical pool through a pipeline, and the flocculating agent can be PAC (poly aluminum chloride) and PAM (polyacrylamide), or PAM.
And step S4, dehydrating the sludge entering the plate-and-frame filter press 7, and sending the dehydrated sludge into a thin layer drier 9 for thin layer drying.
In the specific embodiment of the invention, one side of the plate-and-frame filter press 7 is connected with the conditioning tank 5 through a pipeline, the other side of the plate-and-frame filter press is connected with the thin layer drier 9 through a pipeline, and the conditioned sludge enters the plate-and-frame filter press 7 through a pipeline and is squeezed and dehydrated in the plate-and-frame filter press 7.
And step S5, carrying out thin-layer drying on the sludge dehydrated by the plate-and-frame filter press 7 and fed by the thin-layer drying machine 9 by using hot water vapor generated by the steam generating device.
In the embodiment of the invention, one side of a thin layer drier 9 is connected with a plate-and-frame filter press through a pipeline, the thin layer drier is connected with a steam generating device 8 through a pipeline, hot water steam generated by the steam generating device 8 enters the thin layer drier 9 to dehydrate sludge, the sludge dehydrated by the thin layer drier 9 is discharged from a sludge outlet and then transported out for disposal, preferably, the residual sludge treatment device further comprises a condenser 6, one side of the condenser is connected with the thin layer drier 9 through a gas pipeline, the water steam discharged from the thin layer drier 9 is condensed by the condenser 6 to form condensed water and then is sent into a biochemical pool, and meanwhile, supernatant treated by the thin layer drier 9 returns to the biochemical pool through a pipeline. In the embodiment of the present invention, the steam generating device 8 may be a hot water boiler, one side of which uses natural gas, electricity and steam as energy sources, and the other side of which supplies hot water to the plate-and-frame filter press 7 through a pipeline.
Examples
Fig. 4 is an application environment layout diagram of the excess sludge treatment device combining microbubble ozonation and thin layer drying in the embodiment of the invention. In this embodiment, the ozone generator 3 and the microbubble generator 2 are disposed in an ozone machine room, and the plate-and-frame filter press 7, the thin-layer dryer 9, the condenser 6, and the hot water boiler 8 are disposed in a dehydration machine room.
Example 1: and (3) introducing the residual sludge with the water content of about 99% into the sludge reaction tank 1 through a sludge inlet pipe, and allowing the residual sludge to stay in the sludge reaction tank 1 for 2 hours, wherein the mass ratio of the ozone adding amount to the sludge is about 1: 400. And after aeration is finished, tail gas enters the biochemical tank through a gas pipeline for aeration, residual sludge is subjected to sludge-water separation, and supernatant returns to the biochemical tank through a pipeline. The sludge after aeration treatment enters the pre-conditioning tank 4 through a pipeline and is elutriated by using the effluent of the biochemical tank. And after the elutriation is finished, sludge and water are separated, and supernatant returns to the biochemical tank through a pipeline. The pretreated sludge enters a conditioning pool 5 through a pipeline, and a flocculating agent is added for conditioning. After conditioning is finished, sludge and water are separated, and supernatant returns to the biochemical tank through a pipeline. The conditioned sludge enters a plate-and-frame filter press 7 through a pipeline for dehydration. And (3) the sludge discharged from the plate-and-frame filter press 7 enters a thin layer drier 9 to be dried by using water vapor generated by a hot water boiler, after the drying is finished, the sludge is transported outside and treated, and the supernatant returns to the biochemical pool through a pipeline. The water vapor enters the condenser 6, and returns to the biochemical pool through a pipeline after forming condensed water.
Example 2: and (3) introducing the residual sludge with the water content of about 99.5% into the sludge reaction tank 1 through a sludge inlet pipe, and allowing the residual sludge to stay in the sludge reaction tank 1 for 3 hours, wherein the mass ratio of the ozone adding amount to the sludge is about 1: 800. And after aeration is finished, tail gas enters the biochemical tank through a gas pipeline for aeration, residual sludge is subjected to sludge-water separation, and supernatant returns to the biochemical tank through a pipeline. The sludge after aeration treatment enters the pre-conditioning tank 4 through a pipeline and is elutriated by using the effluent of the biochemical tank. And after the elutriation is finished, sludge and water are separated, and supernatant returns to the biochemical tank through a pipeline. The pretreated sludge enters a conditioning pool 5 through a pipeline, and a flocculating agent is added for conditioning. After conditioning is finished, sludge and water are separated, and supernatant returns to the biochemical tank through a pipeline. The conditioned sludge enters a plate-and-frame filter press 7 through a pipeline for dehydration. And (3) drying the sludge discharged from the plate-and-frame filter press 7 in a thin layer drier 9 by using water vapor generated by a hot water boiler, transporting the sludge outwards after drying, returning supernatant to the biochemical pool through a pipeline, and returning the water vapor to the condenser 6 to form condensate water and then returning the condensate water to the biochemical pool through the pipeline.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the scope of the invention should be determined from the following claims.
Claims (10)
1. The utility model provides a combined microbubble ozonation and thin layer mummification's surplus sludge treatment device, includes:
the sludge reaction tank (1) is used for circularly reacting residual sludge entering the sludge reaction tank (1) with ozone gas microbubbles and then sending the residual sludge into the pre-conditioning tank (4);
the pre-conditioning pool (4) is used for pre-treating the sludge treated by the sludge reaction tank (1) and feeding the pre-treated sludge into the conditioning pool (5);
the conditioning tank (5) is used for conditioning the sludge entering the conditioning tank (5) by using a flocculating agent to form concentrated sludge;
the plate and frame filter press (7) is used for dehydrating the sludge entering the plate and frame filter press (7) and sending the dehydrated sludge into a thin layer drier (9) for thin layer drying;
and the thin layer drier (9) is used for carrying out thin layer drying on the sludge which is dehydrated and fed into the plate-and-frame filter press (7) by utilizing hot water vapor.
2. The residual sludge treatment device combining microbubble ozonation and thin-layer drying as set forth in claim 1, wherein: surplus sludge processing apparatus still includes microbubble generator (2), circulating pump (12), microbubble generator (2) one side is connected with sludge retort (1) through return line, and the opposite side is connected with circulating pump (12) through return line, and circulating pump (12) opposite side passes through gas line and links to each other with sludge retort (1).
3. The residual sludge treatment device combining microbubble ozonation and thin-layer drying as set forth in claim 2, wherein: the residual sludge treatment device also comprises an ozone generator (3), one side of the ozone generator (3) is connected with the micro-bubble generator (2) through a gas pipeline, and the other side of the ozone generator is connected with an oxygen source through a gas pipeline.
4. The residual sludge treatment device combining microbubble ozonation and thin-layer drying as set forth in claim 2, wherein: and tail gas generated after ozone aeration in the sludge reaction tank (1) is finished enters a biochemical tank through a gas pipeline for aeration, and supernatant generated after sludge-water separation of residual sludge is returned to the biochemical tank through a pipeline.
5. The residual sludge treatment device combining microbubble ozonation and thin-layer drying as set forth in claim 2, wherein: the sludge with the water content of about 97 percent after being pretreated in the pretreatment tank (4) is sent into a conditioning tank (5), and supernatant after mud-water separation is returned to the biochemical tank through a pipeline.
6. The residual sludge treatment device combining microbubble ozonation and thin-layer drying as set forth in claim 2, wherein: and (3) the sludge dehydrated in the plate-and-frame filter press (7) enters a thin layer drier (9) for thin layer drying, and the generated compressed liquid returns to the biochemical pool through a pipeline.
7. The device for treating residual sludge by combining microbubble ozonation and thin-layer drying according to claim 6, wherein: the thin-layer drying machine (9) is connected with a steam generating device (8) through a pipeline, and the sludge is subjected to thin-layer drying and dehydration by using hot water steam generated by the steam generating device (8) in the thin-layer drying machine (9).
8. The combined microbubble ozonation and thin layer drying excess sludge treatment device of claim 7, wherein: the excess sludge treatment device also comprises a condenser (6), one side of the condenser is connected with the thin layer drier (9) through a gas pipeline, water vapor generated by the thin layer drier (9) passes through the condenser (6) to form condensed water after condensation treatment and then the condensed water is sent into the biochemical pool, and the supernatant after treatment of the thin layer drier (9) returns to the biochemical pool through a pipeline.
9. A residual sludge treatment method combining microbubble ozonation and thin-layer drying comprises the following steps:
step S1, the residual sludge entering the sludge reaction tank (1) is sent into a pre-conditioning pool (4) after being circularly reacted with ozone gas microbubbles by ozone gas microbubbles;
step S2, pretreating the sludge treated by the sludge reaction tank (1) by using the pretreatment tank (4), and feeding the pretreated sludge into a conditioning tank (5);
s3, conditioning sludge entering the conditioning pool (5) by using a flocculating agent in the conditioning pool (5) to form concentrated sludge, and sending the concentrated sludge to a plate-and-frame filter press (7);
step S4, dehydrating the sludge entering the plate-and-frame filter press, and sending the dehydrated sludge into a thin-layer drier (9) for thin-layer drying;
and step S5, carrying out thin-layer drying on the sludge fed by the plate-and-frame filter press (7) in the thin-layer drying machine (9) by using hot water vapor generated by a steam generating device.
10. The method for treating excess sludge by combining microbubble ozonation and thin-layer drying according to claim 9, wherein in step S1, excess sludge with a water content of about 99-99.5% is introduced into the sludge reaction tank (1), and is allowed to stay in the sludge reaction tank (1) for 2-3h, and then is continuously subjected to ozone aeration by a microbubble generator (2), so that sludge-water separation of the excess sludge in the sludge reaction tank (1) is realized.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110713765.XA CN113292215A (en) | 2021-06-25 | 2021-06-25 | Residual sludge treatment device and method combining microbubble ozonation and thin-layer drying |
| PCT/CN2021/126592 WO2022267282A1 (en) | 2021-06-25 | 2021-10-27 | Residual sludge treatment equipment and method combining microbubble ozonation and thin-layer drying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110713765.XA CN113292215A (en) | 2021-06-25 | 2021-06-25 | Residual sludge treatment device and method combining microbubble ozonation and thin-layer drying |
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| CN114956499A (en) * | 2022-04-29 | 2022-08-30 | 同济大学 | Ozonization conditioning coupled hydrothermal rapid stabilization treatment process for organic sludge |
| WO2022267282A1 (en) * | 2021-06-25 | 2022-12-29 | 上海城市水资源开发利用国家工程中心有限公司 | Residual sludge treatment equipment and method combining microbubble ozonation and thin-layer drying |
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