CN202036825U

CN202036825U - High-sedimentation performance sludge separating device for activated sludge process

Info

Publication number: CN202036825U
Application number: CN2011200178896U
Authority: CN
Inventors: 王佳伟; 甘一萍; 蒋勇; 卢爱国; 赵颖; 周军
Original assignee: Beijing Drainage Group Co Ltd
Current assignee: Beijing Drainage Group Co Ltd
Priority date: 2011-01-20
Filing date: 2011-01-20
Publication date: 2011-11-16
Anticipated expiration: 2021-01-20

Abstract

The utility model discloses a high-sedimentation performance sludge separating device for the activated sludge process. The high-sedimentation performance sludge separating device is provided with an upper cylinder, wherein a funnel-shaped sludge sedimentation cylinder is connected below the upper cylinder, a sludge storage cylinder is arranged at the bottom of the sedimentation cylinder, a lower cylinder is also arranged below the upper cylinder and the sedimentation cylinder, the upper edge is hermetically connected with the outer side of the upper wall of the sedimentation cylinder, the lower cylinder is communicated with inner cavities of the sedimentation cylinder and the upper cylinder through a plurality of guide cylinders arranged on the wall of the sedimentation cylinder, the lower cylinder is also communicated with a water outlet of a biological reaction tank and a water inlet of a secondary sedimentation tank and is provided with a flowmeter, and the bottom of the sludge storage cylinder is communicated with a sludge discharge pipe. The sludge separating device is applicable to sludge separation of the activated sludge process, has perfect structure and good effect and is simple and convenient to operate.

Description

The high settling property mud of activated sludge process sorting unit

Technical field

The utility model belongs to the activated sludge process sewage disposal technology of sewage treatment plant, specifically be in sewage disposal device and the technology, sub-elect the activated sludge of high settling property according to sludge settling property, the mud of getting rid of the settling property difference, thus the Treatment of Sludge load of equipment and the device and the technology of treatment effeciency improved.

Background technology

At present, traditional waste water treatment process exist to be handled the restriction that load is subjected to sludge settling property, makes in the biological reaction pool sludge concentration not high, handles the problem that load can not further improve.At present, activated sludge process is often by increasing filler or adopt membrane bioreactor to carry out mud-water separation in the aeration tank, to improve sludge concentration.But these measures have increased investment and operating cost greatly.Therefore, need do further improvement,, further improve the load of sewage disposal, and reduce investment and operating cost, satisfy needs of society better to improve the sludge concentration in the biological reaction pool to the traditional activated sludge process treatment process.

The utility model content

Technical problem at the existence of traditional activated sludge process treatment process, the purpose of this utility model provides a kind of activated sludge process sludge settling property sorting unit and technology, this device is arranged in the middle of the biological reaction pool and second pond of traditional activated sludge process sewage disposal device, the front is communicated with the delivery port of biological reaction pool, the back is communicated with the water inlet of second pond, is provided with traditional sludge return pipe and sludge pump between second pond and biological reaction pool.This device and technology are by reasonably controlling the mixed liquor upflow velocity of sewage and returned sludge, can be according to settling property sorting activated sludge, keep the good activated sludge of settling property, get rid of the relatively poor activated sludge of settling property, thereby the settling property of mud in the raising active sludge treatment process, the active sludge intermixture of formation high concentration; The saving Sewage Plant is taken up an area of, and improves and handles load, reduces investment and operating cost.

The purpose of this utility model is to realize by following technical scheme:

The high settling property mud of activated sludge process of the present utility model sorting unit is characterized in that: be provided with a upper shell, be provided with effluent weir in the top periphery of this cylindrical shell, this effluent weir is communicated with second pond; End opening edge at upper shell is connected along airtight with the upper brim of a funnel shaped sludge settling tube, the gradient of precipitation barrel is 45～75 degree, upper shell and precipitation tube two tube inner chambers are communicated with, the bottom of this precipitation tube is provided with a storage mud tube, mouthful airtight connection the under the tube of the suitable for reading and precipitation tube of this storage mud tube, the bottom sealing of storage mud tube; Below described upper shell and precipitation tube, also be provided with a lower shell, the diameter of this lower shell is less than upper shell, its upper brim edge and top barrel airtight connection of the outside of precipitating tube, the bottom sealing of this lower shell, its inner chamber is communicated with the inner chamber of precipitation tube and upper shell by several guide shells that are located on the precipitation tube barrel; The delivery port of the biological reaction pool in the lower front side of lower shell and the sludge treatment device is communicated with, and water inlet is provided with preceding flowmeter, and rear side is communicated with the water inlet of second pond, is provided with by-pass valve control and back flowmeter with the connecting pipe of second pond; The discharge pipeline that is communicated with sludge pump that is provided with discharging mud leads to the outside from described storage mud tube bottom; Described upper shell constitutes the precipitation constituency with the precipitation tube, and lower shell constitutes sedimentation and divides the constituency.

The shape of cross section of described upper shell, precipitation tube and lower shell is consistent with each other, is circle or polygon.

The guide shell that is provided with on the described precipitation barrel is 4.

The mud that the sewage of biological reaction pool and second pond reflux constitutes mixed liquor, and this mixed liquor enters activated sludge sorting unit of the present utility model by the biological reaction pool bottom, and a part of mixed liquor directly enters second pond by the connecting pipe that connects second pond; Residual mixed liquor is to continue to rise in sedimentation branch constituency in lower shell, and the activated sludge rapid subsidence that settling property is good in sedimentation branch constituency drops to the bottom in sedimentation branch constituency, and enters second pond by the connecting pipe that connects second pond; The activated sludge that settling property is relatively poor along with residual mixed liquor enters a upper shell and a precipitation precipitation constituency that constitutes by guide shell, in the precipitation constituency, carries out mud-water separation.The relatively poor sludge settling of settling property that enters the precipitation constituency is precipitating on the barrel, and enters storage mud tube along the barrel that tilts.Clarified solution in the upper shell enters second pond by the effluent weir on top and the connecting pipe of second pond; Mud in the storage mud tube is discharged by discharge pipeline.In entering the mixed liquor of second pond, keep the good mud of settling property like this, and got rid of the relatively poor mud of settleability.

The improved major advantage of device of the present utility model:

(1) the utility model device is according to the activated sludge of the different settling properties of settling property sorting.Traditional activated sludge process carries out disposable mud-water separation in second pond, be difficult to distinguish the activated sludge of different settling properties, but whole activated sludge are precipitated, and refluxes or discharge.This device utilizes activated sludge to have the fact of difference on settling property, utilize the sedimentation branch constituency of this device, the good mud of settling property is entered second pond and the biological reaction pool that refluxes, and mud-water separation is carried out in the precipitation constituency of the mud of settling property difference in this device and give off outside the system, thereby make the mud in the entire process system keep good settling property.Higher sludge settling property has been created necessary precondition for improving the sludge concentration in the biological reaction pool, increase to handle to load.

(2) upflow velocity in precipitation constituency generally was controlled at 1～10m/ hour in the method for operating of the present utility model, and the time of staying was controlled at 0.5～2 hour; The upflow velocity in sedimentation branch constituency was controlled at 2～20m/ hour, and the time of staying was controlled at 0.5～2 hour; Therefore, can effectively distinguish the mud of different settling properties as required.

(3) the utility model device is directly discharged the storage mud district of excess sludge from the mud sorting unit, has guaranteed that the relatively poor activated sludge of settling property that sub-elects can in time discharge system, no longer enters system.

Description of drawings

Fig. 1 is the overall structure schematic diagram that sorting unit of the present utility model is provided with in the traditional activated sludge process sewage disposal device;

Fig. 2 is the A-A view among Fig. 1.

The profile of the utility model device is not subjected to the restriction of this figure, and only the profile change also belongs to protection domain of the present utility model.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is described further:

The high settling property mud of activated sludge process sorting unit is provided with a upper shell 21, is provided with effluent weir 211 in the top periphery of this cylindrical shell, and this effluent weir is communicated with second pond; End opening edge at upper shell is connected along airtight with the upper brim of a funnel shaped sludge settling tube 22, the gradient of precipitation barrel is 55 degree, upper shell and precipitation tube two tube inner chambers are communicated with, the bottom of this precipitation tube is provided with a storage mud tube 222, mouthful airtight connection the under the tube of the suitable for reading and precipitation tube of this storage mud tube, the bottom sealing of storage mud tube; Below described upper shell and precipitation tube, also be provided with a lower shell 23, the diameter of this lower shell is less than upper shell, its upper brim edge and top barrel airtight connection of the outside of precipitating tube, the bottom sealing of this lower shell, its inner chamber is communicated with the inner chamber of precipitation tube and upper shell by several guide shells 221 that are located on the precipitation tube barrel; The delivery port of the biological reaction pool 1 in the lower front side of lower shell and the sludge treatment device is communicated with, water inlet is provided with preceding flowmeter 6, the water inlet of the second pond 3 in rear side and the sludge treatment device is communicated with, and is provided with by-pass valve control 5 and back flowmeter 4 with the connecting pipe of second pond; The discharge pipeline that is communicated with sludge pump that is provided with discharging mud leads to the outside from described storage mud tube bottom; Described upper shell constitutes the precipitation constituency with the precipitation tube, and lower shell constitutes sedimentation and divides the constituency; The shape of cross section of described upper shell, precipitation tube and lower shell is consistent with each other, is circle or polygon.

The utility model effect: after adopting this mud sorting unit, its sludge settling speed reaches more than the 6m/h, improves more than 50% than traditional active sludge treatment process.Returned sludge concentration reaches more than the 10000mg/L, and adopt and the same return sludge ratio of traditional activated sludge process: 40%～120% o'clock, the aeration tank sludge concentration can reach more than the 6000mg/L, saves than conventional activated sludge process and takes up an area of more than 30%.

Claims

1. the high settling property mud of activated sludge process sorting unit is characterized in that: be provided with a upper shell (21), be provided with effluent weir (211) in the top periphery of this cylindrical shell, this effluent weir is communicated with second pond; End opening edge at upper shell is connected along airtight with the upper brim of a funnel shaped sludge settling tube (22), the gradient of precipitation barrel is 45～75 degree, upper shell and precipitation tube two tube inner chambers are communicated with, the bottom of this precipitation tube is provided with a storage mud tube (222), mouthful airtight connection the under the tube of the suitable for reading and precipitation tube of this storage mud tube, the bottom sealing of storage mud tube; Below described upper shell and precipitation tube, also be provided with a lower shell (23), the diameter of this lower shell is less than upper shell, its upper brim edge and top barrel airtight connection of the outside of precipitating tube, the bottom sealing of this lower shell, its inner chamber is communicated with the inner chamber of precipitation tube and upper shell by several guide shells (221) that are located on the precipitation tube barrel; The delivery port of the biological reaction pool (1) in the lower front side of lower shell and the sludge treatment device is communicated with, water inlet is provided with preceding flowmeter (6), the water inlet of the second pond (3) in rear side and the sludge treatment device is communicated with, and is provided with by-pass valve control (5) and back flowmeter (4) with the connecting pipe of second pond; The discharge pipeline that is communicated with sludge pump that is provided with discharging mud leads to the outside from described storage mud tube bottom; Described upper shell constitutes the precipitation constituency with the precipitation tube, and lower shell constitutes sedimentation and divides the constituency; The shape of cross section of described upper shell, precipitation tube and lower shell is consistent with each other, is circle or polygon.