CN202492440U

CN202492440U - Sludge stirring tank

Info

Publication number: CN202492440U
Application number: CN2012200646937U
Authority: CN
Inventors: 何坚; 马勇; 匡鸿; 郑正; 陆民宪
Original assignee: Cement Co Ltd Of Shanghai Building Material Group; Fudan University
Current assignee: Cement Co Ltd Of Shanghai Building Material Group; Fudan University
Priority date: 2012-02-27
Filing date: 2012-02-27
Publication date: 2012-10-17
Anticipated expiration: 2022-02-27

Abstract

The utility model belongs to the technical field of environmental protection and particularly relates to a sludge stirring tank. The sludge stirring tank mainly comprises a tank body, a speed reducing motor and a stirring shaft, wherein the speed reducing motor is arranged on the upper portion of the tank body, the stirring shaft is connected with a shaft of the speed reducing motor, and the stirring shaft is inserted into the tank body. A stiffening rib plate is arranged on the side wall of the tank body, a hole for enabling a fluid to pass through is disposed on the stiffening rib plate, an air feeding pipe is arranged beside the stiffening rib plate, and the air feeding pipe is directly communicated to the lower portion of the stirring tank body. An emptying pipe is mounted at the bottom of the tank body. The sludge stirring tank has the advantages that during the stirring process, a stirring blade drives a sludge fluid to bump the surrounding stiffening rib plate to form a strong turbulent flow in a side wall region, sludge materials are prevented from adhering to the side wall and clustering, the air feeding pipe is arranged beside the stiffening rib plate, during the stirring process, air can be fed into the stirring tank through the air feeding pipe, the turbulent flow in the stirring tank can be strengthened, the homogenizing of dilution of the sludge can be improved, and the sludge stirring tank has an excellent effect on dilution stirring of the sludge.

Description

Sludge agitator tank

Technical field

The utility model belongs to environmental technology field, is specifically related to a kind of device of mud thin up.

Background technology

By the end of the year 2011, nearly 3000 urban wastewater treatment firms have been built up in the whole nation, and a day sewage treatment capacity reaches billion cubic meter more than 1.0, will produce a large amount of active sludge thus.Mud is the solid precipitation material that is produced by water and sewage treatment process, and pre-treatment, preliminary sedimentation tank, second pond that generally derives from water treatment etc. located.Without the mud of stabilizing treatment, very easily corrupt and produce stench because of organic content is high, especially contain a large amount of germs, parasitic ovum and virus, be prone to cause the secondary pollutions such as propagation of transmissible disease.The thickening device (comprising belt machine and whizzer) of mud generally is concentrated into water ratio about 80% with mud and transports outward processing again in the sewage work at present.

National house in 2009 and town and country construction portion, Environmental Protection Department, the Ministry of Science and Technology unite and have issued " the urban wastewater treatment firm sludge treatment is disposed and pollution prevention technique policy (trying) " new policy; With farmland utilization clear and definite requirement is arranged to the mud of municipal wastewater treatment plant is stable, require the water ratio of mud to be reduced to below 60% and just can advance the landfill yard landfill.Since usually municipal sludge at water ratio behind the mechanical dehydration generally more than 80%; Further deep dehydration is handled if desired; Can adopt water ratio in the concentration basin is 97% the direct deep dehydration of mud; After perhaps water ratio being the dilution of 80% mud, stir fully reaction, and then adopt device for dehydrating sladge waste such as diaphragm type plate-and-frame filter press further the water ratio of mud to be reduced to below 60% with the deep dehydration medicament.Thereby, for the mud that part needs dilution, need reasonably design the dilution stirred pot of mud.

Mud is flocculating through adding polymeric flocculant after concentrating through sewage work, the belt filter press or the whizzer centrifuge dehydration that get into sewage work again, and the mud after existing belt filter press of process or the whizzer centrifuge dehydration is because biological cells in sludge and colloidal content are bigger; Be the mucilage shape, water molecules is by one deck colloid parcel, for this reason; The design of general stirred pot; Be difficult to mud is stirred at short notice, mud is generally stirring tank body periphery deposition or is adhering to, and it is even that mud is difficult to thin up; If strengthen the Dilution ratio of mud, then there is the long or bigger problem of design power of agitator of follow-up deep dehydration cycle.

Domestic number of patent application is the device that 200820232274.3 patent provides a kind of slurry stirred pot; This device has effect preferably for the little particle of particle viscosity; But for the bigger material of this viscosity of mud; Wall has viscous effect on the stirred pot limit, thereby still exists stirring to be difficult to uniform problem.

Summary of the invention

The purpose of the utility model is to provide a kind of mixing effect good, mixes full and uniform mud dilution whipping appts.

The mud whipping appts that the utility model provides, its structure is as shown in Figure 1, comprises tank body 5, reducing motor 1 and stir shaft 4; Said reducing motor 1 is located at tank body 5 tops, on the axle of reducing motor 1, connects described stir shaft 4; Stir shaft 4 inserts tank body 5 inside; On the wall of the limit of tank body 5, be provided with deep floor 3, deep floor 3 is provided with and can passes through the fluidic hole; On deep floor 3 next doors, be provided with ventpipe 2, ventpipe 2 direct UNICOMs are to the bottom of stirring tank body; In tank base, be provided with evacuated tube 6.

The special character of this sludge agitator tank is:

1) on the limit wall that stirs tank body, be provided with deep floor, floor is provided with and can passes through the fluidic hole;

2) the strengthening rib edges of boards are provided with ventpipe, can pass through ventpipe bubbling air in stirred pot.

The utility model compared with prior art has the following advantages:

1, because stir shaft is provided with agitating vane, agitating vane drive mud fluid and peripheral deep floor bump, thereby the wall zone forms stronger turbulent flow on the limit, has avoided the adhesion and the conglomeration of mud material opposite side wall in the process that stirs;

2, be provided with ventpipe at the strengthening rib edges of boards,, need to adopt air because in the deeply dehydrating sludge process.Thereby in the process that stirs, can pass through ventpipe bubbling air in stirred pot, and strengthen the turbulent flow in the stirred pot, promote homogenizing of mud dilution.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Label among the figure: the 1st, reducing motor, the 2nd, ventpipe, the 3rd, deep floor, the 4th, stir shaft, the 5th, tank body, the 6th, evacuated tube.

Embodiment

As shown in the figure, a kind of sludge agitator tank comprises tank body 5, and tank body 5 tops are provided with reducing motor 1, on the axle of reducing motor 1, is connected with stir shaft 4, and described stir shaft 4 inserts tank body 5 inside.On the wall of the limit of tank body 5, be provided with deep floor 3, deep floor 3 is provided with and can passes through the fluidic hole; On deep floor 3 next doors, be provided with ventpipe 2, ventpipe 2 direct UNICOMs are to the bottom of stirring tank body.In tank base, be provided with evacuated tube 6.

In stirred pot 5, add earlier the water of sludge quantity 120% (quality) earlier, start agitator motor 1, the water ratio that needs are stirred is that 80% mud adds in the stirred pot 5.Because on the wall of the limit of tank body 5, be provided with deep floor 3, deep floor 3 is provided with and can passes through the fluidic hole; After starting reducing motor 1, stir shaft 4 begins to stir mud, and mud fluid and deep floor 3 clash into and produce turbulent flow, wash away the limit wall of stirred pot 5, make that wall can't deposit mud on the limit.When stirring, bubbling air in ventpipe 2, because ventpipe 2 direct UNICOMs are to the bottom of stirring tank body, air is gone out from the bottom of stirred pot, has strengthened the interior turbulent flow of stirred pot, thereby has promoted homogenizing of mud.Big solid particulate in the sludge tank, the middle part that concentrates on stirred pot is through the evacuated tube emptying.

Claims

1. a sludge agitator tank is characterized in that: comprise tank body, reducing motor and stir shaft; Said reducing motor is located at tank body top, on the axle of reducing motor, connects described stir shaft; Stir shaft inserts tank interior; On the wall of the limit of tank body, be provided with deep floor, deep floor is provided with and can passes through the fluidic hole; On the deep floor next door, be provided with ventpipe, the direct UNICOM of ventpipe is to the bottom of stirring tank body; In tank base, be provided with evacuated tube.