CN202968333U

CN202968333U - Mixed reaction tank structure of excess sludge backflow utilizing system

Info

Publication number: CN202968333U
Application number: CN 201220743944
Authority: CN
Inventors: 庞子山; 杜宇麟; 张琨
Original assignee: CHONGQING YUXI WATER SERVICE Co Ltd
Current assignee: CHONGQING YUXI WATER SERVICE Co Ltd
Priority date: 2012-12-29
Filing date: 2012-12-29
Publication date: 2013-06-05
Anticipated expiration: 2022-12-29

Abstract

The utility model discloses a mixed reaction tank structure of an excess sludge backflow utilizing system. The mixed reaction tank structure is characterized by comprising a mixed reaction tank body, wherein a liquid inlet channel for supplying sludge to enter and an alkali liquor feeding pipeline for supplying alkali liquid are connected to the tank body; the tank body also comprises an outlet channel which is communicated with a precipitating concentrating tank; a tank cover is arranged on the tank body; a motor is fixedly arranged in the middle of the tank cover; and a main shaft of the motor downwards extends into the sludge in the tank body and is provided with a stirring blade. The mixed reaction pond structure can be applied to the excess sludge backflow utilizing system, is convenient for realizing the reaction between the activated sludge and the alkali liquor, can improve the reaction efficiency, and has the advantages of simple structure, low in implementation cost and the like, and is convenient to implement.

Description

A kind of residual sludge reflux utilizes the hybrid reaction pool structure of system

Technical field

The utility model relates to a kind of sewage treatment area, and especially a kind of residual sludge reflux of activated sludge process water treatment utilizes the hybrid reaction pool structure of system.

Background technology

Along with the raising day by day of the level of urbanization and living standards of the people, the daily water yield increases, sewage disposal

The factors such as the Facilities Construction difficulty is large cause municipal effluent usually to present organic concentration low, and nitrogen and phosphorus content is higher.Especially Shelter in South China Cities, with heavy rainfall, and the collection mode of sanitary sewage usually links together with Xiaohegou, namely directly tackles the stream sewage is introduced Sewage Plant, further reduced and advanced factory's organic concentration, strengthens intractability.Municipal effluent water quality presents that organic concentration is more and more lower, nitrogen phosphorus nutrition thing is more and more higher, the phenomenon of the C/N of sewage, C/P ratio continuous decrease.For most of Sewage Plant, realize that synchronous denitrification dephosphorizing itself just has certain difficulty, and in low carbon source treatment system, this problem shows more obviously; The emission standard requirement is further strict in addition, guarantees when guaranteeing denitrogenation in low carbon source treatment system that therefore phosphor-removing effect and qualified discharge seem particularly important.

At present, China's most cities Sewage Plant is lower for entering organic matter of water concentration, can't guarantee that the conventional means of synchronous denitrification dephosphorizing problem is for to add the dephosphorization medicament, to add methyl alcohol in the denitrification section at second pond.This operational mode is to cause the high major cause of low carbon source Sewage Plant working cost obviously.Therefore, at present the mode that adds carbon source that adopts of Sewage Plant has not only increased Financial cost, has also run counter to the aim of energy-saving and emission-reduction, less energy-consumption simultaneously.

Simultaneously, activated sludge process is present most widely used dirty water living creature processing technique, but there is the drawback of a maximum in it always, can produce a large amount of excess sludges exactly.At present, excess sludge is processed and is mostly adopted landfill or burning, these ordinary methods can be brought new negative effect to environment again in lignin-sludge, in addition, investment and the working cost of sludge treatment are huge, can account for 25%-65% of whole Sewage Plant investment and working cost, become the heavy burden that Sewage Plant faces.Although the municipal wastewater moisture percentage in sewage sludge is high, viscosity is strong, be difficult for realizing mud-water separation, but wherein contain a large amount of organism, show according to related data, the organic content of active sludge is more than 70%, and organic composition comprises carbohydrate 10%～20%, fat 20%～40%, protein 30%～40%.

In order to address the above problem, the applicant considers to have designed a kind of residual sludge reflux and utilizes system, the part active sludge that the activated sludge process water treatment is produced reclaims, then add alkali lye to make its reaction, to add dephosphorization agent to process in the carbonaceous sources supernatant liquor that precipitate and isolate after reaction, then just can be used as carbon source and recycle.

In this system, how to design a mixed reaction pond to be used for the hybrid reaction of active sludge and alkali lye, improve speed of reaction, become the problem that remains to be considered.

The utility model content

For the deficiencies in the prior art, technical problem to be solved in the utility model is, how to provide a kind of simple in structure, be used for the hybrid reaction pool structure that residual sludge reflux that residual sludge reflux utilizes system to facilitate active sludge and alkaline reaction also can improve reaction efficiency utilizes system.

In order to solve the problems of the technologies described above, adopted following technical scheme in the utility model:

A kind of residual sludge reflux utilizes the hybrid reaction pool structure of system, it is characterized in that, comprise mixed reaction pond pond body, be connected with the feed pathway that enters for mud on the body of pond and add pipeline for the alkali lye that alkali lye enters, the pond body also has and precipitates the exit passageway of concentration basin connection, body top, pond is provided with Chi Gai, and lid middle part, pond is fixedly installed motor, and electric machine main shaft extends down in the interior mud of pond body and is provided with agitating vane.

In reaction tank structure of the present utility model, being provided with feed pathway enters for mud, being provided with alkali lye adds pipeline and adds for alkali lye, then be provided with the whipping appts that motor and agitating vane consist of, can adopt the mode accelerate sludge of stirring and mixing of alkali lye, accelerated reaction, after mixing mud enter the precipitation concentration basin by exit passageway and precipitate and make it precipitate and isolate supernatant liquor, and then add in supernatant liquor and namely can be used as the sewage disposal carbon source after the dephosphorization agent reaction and recycle.So just can not only reduce excess sludge production, reduce the subsequent treatment cost of excess sludge, and can also make up as a kind of supplementary carbon source of cheapness not enough this present situation of carbon source in the municipal wastewater water inlet.

In addition, when specifically implementing, as optimization, the feed pathway that confession mud enters and the alkali lye that supplies alkali lye to enter add install pipeline and hold in Chi Tiyi, and exit passageway is arranged at the other end, to extend the reaction times, improves reaction effect.

In sum, the utility model can be used in residual sludge reflux and utilizes and facilitate active sludge and alkaline reaction in system and can improve reaction efficiency, also have simultaneously simple in structure, the advantage such as it is convenient to implement, and implementation cost is cheap.

Description of drawings

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

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

Be illustrated in fig. 1 shown below, a kind of residual sludge reflux utilizes the hybrid reaction pool structure of system, comprise mixed reaction pond pond body 1, be connected with the feed pathway 2 that enters for mud on pond body 1 and add pipeline 3 for the alkali lye that alkali lye enters, pond body 1 also has and precipitates the exit passageway 4 of concentration basin connection, body 1 top in pond is provided with pond lid 5, and lid 5 middle parts, pond are fixedly installed motor 6, and motor 6 main shafts extend down in the interior mud of pond body and are provided with agitating vane 7.

Claims

1. a residual sludge reflux utilizes the hybrid reaction pool structure of system, it is characterized in that, comprise mixed reaction pond pond body, be connected with the feed pathway that enters for mud on the body of pond and add pipeline for the alkali lye that alkali lye enters, the pond body also has and precipitates the exit passageway of concentration basin connection, body top, pond is provided with Chi Gai, and lid middle part, pond is fixedly installed motor, and electric machine main shaft extends down in the interior mud of pond body and is provided with agitating vane.