CN216863940U

CN216863940U - Sludge treatment device

Info

Publication number: CN216863940U
Application number: CN202220752924.7U
Authority: CN
Inventors: 黄彬; 仇光宇; 朱彬; 陈凤秋
Original assignee: Changhua Chemical Technology Co ltd
Current assignee: Changhua Chemical Technology Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-07-01
Anticipated expiration: 2032-04-02

Abstract

The utility model relates to a sludge treatment device, which mainly solves the problems of high water content, much solid waste and high treatment cost of sludge produced in polyether polyol production in the prior art. The utility model adopts a sludge treatment device which comprises a biochemical tank (1), a secondary sedimentation tank (2), an excess sludge tank (3), a desliming machine (5), a sewage treatment system (7), a dryer (6) and a dry sludge warehouse (8); the water outlet of the biochemical pond (1) is connected with the water inlet of the secondary sedimentation pond (2), the sludge outlet of the secondary sedimentation pond (2) is connected with the sludge inlet of the excess sludge pond (3), the sludge outlet of the excess sludge pond (3) is connected with the sludge inlet of the desliming machine (5), the sludge outlet of the desliming machine (5) is connected with the dryer (6), and the sludge outlet of the dryer (6) is connected with the dry sludge warehouse (8).

Description

Sludge treatment device

Technical Field

The utility model relates to the field of polyether polyol, in particular to a sludge treatment device.

Background

A large amount of industrial sewage can be generated in the industrial production of polyether polyol, the conventional process adopted by a sewage treatment device comprises an aerobic process, and the basic principle of sewage treatment by adopting the aerobic process is as follows: under aerobic conditions, microorganisms in the sludge metabolize to decompose organic matters in the sewage into carbon dioxide and water so as to achieve the purpose of degrading the organic matters, and meanwhile, the microorganisms in the sludge proliferate themselves, so that high-concentration activated sludge in a sewage treatment system is ensured to further degrade the organic matters; one part of sludge discharged from the secondary sedimentation tank flows back to the biochemical tank, the rest sludge is temporarily stored in the residual sludge tank, and then is pumped into a desliming machine by a screw pump for sludge-water separation, the sludge desliming from the desliming machine is wet sludge with the water content of more than 85 percent, about 8 tons of wet sludge can be generated every day, the sludge amount is large, the part of wet sludge is taken as solid waste and needs to be sent out for treatment, and the treatment cost is high; therefore, if the water content in the wet sludge can be effectively reduced, the method has important practical significance for reducing the solid waste amount and the treatment cost.

Chinese patent CN106630422A discloses a biological treatment device for polyether polyol production wastewater, which mainly comprises a regulating tank, a CBR tank, an activated sludge tank, a secondary sedimentation tank, an ozone oxidation tank, an excess sludge tank, a sludge dewatering machine and a water collecting tank, wherein a sludge outlet of the excess sludge tank is connected with the sludge dewatering machine; however, the water content of the sludge from the sludge dewatering machine in the device is more than 85 percent, the sludge amount is large, and the solid waste treatment cost is high.

Chinese patent CN212610216U discloses a difficult-to-treat sludge high-dry dehydration system, which comprises a sludge pretreatment device, a sludge elutriation conditioning device and a sludge high-dry dehydration device which are sequentially communicated; the method comprises the following steps that a conditioner is added into a sludge pretreatment device, so that free water in sludge is separated, and the water content of the sludge is reduced to 75-90%; the sludge elutriation conditioning device further improves the sludge dewatering performance by adding elutriation water and a conditioner into the pretreated sludge; the sludge high-dry dehydration device separates water in the elutriated sludge again through filtering and squeezing, reduces the water content of the sludge to 50-70%, but has poor dehydration efficiency, higher water content of the obtained sludge, larger sludge amount and higher solid waste treatment cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems of high water content, more solid waste and high treatment cost of sludge generated in polyether polyol production in the prior art, and provides a sludge treatment device which has the advantages of low water content of the treated sludge, less solid waste and treatment cost saving.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a sludge treatment device comprises a biochemical tank 1, a secondary sedimentation tank 2, an excess sludge tank 3, a desliming machine 5 and a sewage treatment system 7, wherein the sludge treatment device also comprises a drying machine 6 and a dry sludge warehouse 8; the biochemical tank 1 and the secondary sedimentation tank 2 are both provided with a water inlet and a water outlet; the residual sludge tank 3, the desliming machine 5 and the dryer 6 are all provided with a sludge inlet and a sludge outlet; the secondary sedimentation tank 2 is also provided with a sludge outlet; the deslimer 5 and the dryer 6 are both provided with water outlets; the water outlet of the biochemical pond 1 is connected with the water inlet of the secondary sedimentation pond 2, the sludge outlet of the secondary sedimentation pond 2 is connected with the sludge inlet of the excess sludge pond 3, the sludge outlet of the excess sludge pond 3 is connected with the sludge inlet of the deslimer 5, the sludge outlet of the deslimer 5 is connected with the sludge inlet of the dryer 6, the sludge outlet of the dryer 6 is connected with the dry sludge warehouse 8, and the water outlets of the secondary sedimentation pond 2, the deslimer 5 and the dryer 6 are all connected with the sewage treatment system 7.

Furthermore, the biochemical tank 1 is also provided with a sludge inlet, and the sludge from the secondary sedimentation tank 2 partially flows back to the biochemical tank 1 through a sludge return pipeline 2-1.

Further, the dryer 6 is provided with a steam inlet, and wet sludge in the dryer is heated through steam.

Furthermore, a pump 4 is arranged on a connecting pipeline between the residual sludge tank 3 and the desliming machine 5.

Further, the pump 4 is a screw pump.

According to the sludge treatment device provided by the utility model, the dryer is additionally arranged at the rear end of the desliming machine, the sludge inlet of the dryer is connected with the sludge outlet of the desliming machine, the dryer is used for drying wet sludge in a steam heating mode, so that the wet sludge is dried into dry sludge, the water content of the sludge is reduced to 30% from 85%, the amount of solid waste sludge is effectively reduced, the solid waste treatment cost is saved, and a better technical effect is achieved.

Drawings

FIG. 1 is a schematic structural view of a sludge treatment apparatus according to the present invention.

In the attached figure 1, 1 is a biochemical tank, 2 is a secondary sedimentation tank, 2-1 is a sludge return pipeline, 3 is a residual sludge tank, 4 is a pump, 5 is a desliming machine, 6 is a dryer, 7 is a sewage treatment system, and 8 is a dry sludge warehouse.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

[ example 1 ]

A sludge treatment device comprises a biochemical tank 1, a secondary sedimentation tank 2, an excess sludge tank 3, a desliming machine 5, a sewage treatment system 7, a dryer 6 and a dry sludge warehouse 8; wherein, the biochemical tank 1, the secondary sedimentation tank 2 and the sewage treatment system 7 are all provided with a water inlet and a water outlet; the excess sludge tank 3, the desliming machine 5, the dryer 6 and the dry sludge warehouse 8 are all provided with a sludge inlet and a sludge outlet; the secondary sedimentation tank 2 is also provided with a sludge outlet; the deslimer 5 and the dryer 6 are both provided with water outlets;

the water outlet of the biochemical pond 1 is connected with the water inlet of the secondary sedimentation pond 2, the sludge outlet of the secondary sedimentation pond 2 is connected with the sludge inlet of the excess sludge pond 3, the sludge outlet of the excess sludge pond 3 is connected with the sludge inlet of the deslimer 5 through the screw pump 4, the sludge outlet of the deslimer 5 is connected with the sludge inlet of the dryer 6, the sludge outlet of the dryer 6 is connected with the dry sludge warehouse 8, and the water outlets of the secondary sedimentation pond 2, the deslimer 5 and the dryer 6 are all connected with the sewage treatment system 7; the biochemical tank 1 is also provided with a sludge inlet, and part of sludge from the secondary sedimentation tank 2 flows back to the biochemical tank 1 through a sludge return pipeline 2-1; the dryer 6 is provided with a steam inlet, and wet sludge in the dryer is heated through steam.

The water content of the wet sludge separated by the desliming machine is 85%, the water content of the dry sludge obtained after drying by the dryer is 30%, the water content of the sludge is greatly reduced, the device can treat 8 tons of wet sludge every day at present, the dried sludge discharged after drying is about 1.5 tons, the solid waste amount of the sludge is reduced by 6.5 tons/day, and the cost of conveying the solid waste of the sludge out can be saved.

The sludge treatment device provided by the utility model has the advantages of effectively reducing the water content of the sludge, reducing the solid waste amount of the sludge and saving the outward delivery treatment cost of the sludge, obtains good technical effect and can be used in the industrial production of polyether polyol.

Claims

1. A sludge treatment device comprises a biochemical tank (1), a secondary sedimentation tank (2), an excess sludge tank (3), a desliming machine (5) and a sewage treatment system (7), and is characterized by also comprising a dryer (6) and a dry sludge warehouse (8); the biochemical tank (1) and the secondary sedimentation tank (2) are both provided with a water inlet and a water outlet; the residual sludge tank (3), the desliming machine (5) and the dryer (6) are provided with a sludge inlet and a sludge outlet; the secondary sedimentation tank (2) is also provided with a sludge outlet; the deslimer (5) and the dryer (6) are both provided with water outlets; wherein, the delivery port of biochemical pond (1) links to each other with the water inlet of two heavy ponds (2), the mud export of two heavy ponds (2) links to each other with the mud import of excess sludge pond (3), the mud export of excess sludge pond (3) links to each other with the mud import of desliming machine (5), the mud export of desliming machine (5) links to each other with the mud entry of drying-machine (6), the mud export of drying-machine (6) links to each other with dry sludge warehouse (8), the delivery port of two heavy ponds (2), desliming machine (5) and drying-machine (6) all links to each other with sewage treatment system (7).

2. The sludge treatment apparatus according to claim 1, wherein the biochemical tank (1) is further provided with a sludge inlet, and the sludge from the secondary sedimentation tank (2) partially flows back to the biochemical tank (1) through a sludge return line (2-1).

3. The sludge treatment apparatus according to claim 1, wherein the dryer (6) is provided with a steam inlet for heating wet sludge in the dryer by steam.

4. A sludge treatment plant according to any of claims 1-3, wherein a pump (4) is arranged in the connecting line between the excess sludge basin (3) and the desliming machine (5).

5. The sludge treatment plant according to claim 4, wherein the pump (4) is a screw pump.