CN2517478Y

CN2517478Y - Siphon type decanter

Info

Publication number: CN2517478Y
Application number: CN 01267895
Authority: CN
Inventors: 张大群; 王守明; 张大成; 王秀朵; 金宏
Original assignee: XIANGSEN ENVIRONMENT ENGINEERING EQUIPMENT DEVELOPMENT CO LTD TIANJIN CITY
Current assignee: XIANGSEN ENVIRONMENT ENGINEERING EQUIPMENT DEVELOPMENT CO LTD TIANJIN CITY
Priority date: 2001-10-24
Filing date: 2001-10-24
Publication date: 2002-10-23
Anticipated expiration: 2011-10-24

Abstract

The utility model relates to a siphon decanter, which is arranged and used as a cleaning device to remove the supernatant in the deposition tank and the reaction tank for the sewage treatment plant. The siphon decanter comprises a U-shaped pipe, a water collection manifold and a group of horizontal water collecting pipes, which is characterized in that one side top end of the U-shaped pipe is provided with an overflowing weir crest, a water outlet is positioned on the overflowing weir crest in the lowest water level of the reaction tank; the other end of the U-shaped pipe is lower than the overflowing weir crest and is communicated with the water collection manifold, the top of the water collection manifold is communicated with the atmosphere by an exhaust valve; the horizontal water collecting pipes are arranged on two sides of the water collecting manifold, a plurality of vertical short pipes are positioned on the lower side of the water collecting manifold, and the weir crest of the vertical short pipe is downwards and is submerged in the reaction tank. The utility model has the advantages that the exhaust valve is controlled by the suitable program and the supernatant in the reaction tank is removed by the U-shaped pipe and the exhaust pipe.

Description

The siphonic decant device

The utility model relates to a kind of hydrophone of straining that is used to get rid of supernatant in sewage treatment plant's sedimentation basin or the reaction tank that is installed in, and particularly relates to a kind of siphonic decant device that is installed in the sbr reactor pond.

Strain hydrophone and be mounted in the special equipment that is used to get rid of supernatant in sewage treatment plant's sedimentation basin or the reaction tank, in various sewage disposal systems, all have a wide range of applications.At present, that adopts in the sewage treatment process system both at home and abroad strains hydrophone, mainly contains pipeline type rotary-type water decanter, weir gate type rotary-type water decanter and the telescopic hydrophone etc. of straining.Though the hydrophone of straining of above-mentioned various types all has certain water effect of straining, and still has some weak point in actual use.At first, the above-mentioned various water inlet coverage rates of straining hydrophone are less, and it is narrow to strain the water scope, also poor to the adaptability of the water yield and change of water quality; Secondly, the operation of straining hydrophone needs power and machine driving, and operating cost and fault rate are all than higher, and moving component also stirs sludge underwater easily, the water effect is strained in influence.Because more than, the range of application of straining hydrophone of above-mentioned various types has been subjected to certain restriction.

Sequencing batch active sludge (be called for short SBR method, have another name called the intermittent aerating method) is advanced both at home and abroad at present sewage treatment process method, series of advantages such as have that technology is simple, structures are few and cost is low.The main body structures of this process system are the sbr reactor ponds; Operations such as the reaction in the treatment process, precipitation, draining and eliminating excess sludge are all here finished.Therefore, the process system of SBR method is fairly simple, but then relatively stricter to the requirement of straining hydrophone, promptly not only requires it can block scum silica frost, but also require its crest of weir water outlet evenly, load can not be excessive, to guarantee reaction tank supernatant smooth flow; Also require the flow of crest of weir excessive variation can not take place simultaneously because of the rising of reaction tank water level.Obviously, above-mentioned several types strains hydrophone and all can't satisfy these requirements fully.

The purpose of this utility model promptly is to provide a kind of water inlet area coverage big, strains the hydrophone of straining of water wide ranges and movement-less part, strains the water effect and to the good conformity ability of the water yield, change of water quality to reach good.

To achieve these goals, the utility model utilizes U-shaped pipe, water header and one group of level set water pipe to constitute a kind of siphonic decant device.The U-shaped pipe is installed on the concrete foundation at the bottom of the reaction tank, one side top is the overflow crest of weir, be lower than reaction tank lowest water level place and be provided with the delivery port that is used to connect drainpipe, another side is lower than the overflow crest of weir and is communicated with water header, and its top communicates with atmosphere by air bleeding valve; The level set water pipe is respectively in the both sides of water header, and its downside is provided with a plurality of vertical short tubes, its crest of weir downwards and be submerged in the reaction tank water,

For the hydrophone of straining of formation like this,, can discharge the reaction tank supernatant by U-shaped pipe and drainpipe as long as press the keying of suitable programme-control air bleeding valve.Because there is not moving component in the siphonic decant device, therefore can agitate water at the bottom of precipitating sludge, can realize the good water effect of straining; Be provided with the design of one group many level set water pipes of a plurality of vertical short tubes, can effectively enlarge the water inlet area coverage, increase the water scope of straining.Be described in further detail below in conjunction with the technical characterictic of specific embodiment the utility model siphonic decant device.

Accompanying drawing 1,2,3 is respectively front view, vertical view and the left view of the utility model siphonic decant device.

With reference to the accompanying drawings 1,2,3, the utility model siphonic decant device mainly is made of U-shaped pipe, water header and one group many level set water pipes.U-shaped pipe 1 is a U-shaped, is installed on the concrete foundation 2 at the bottom of the reaction tank; One side top is an overflow crest of weir 3, is lower than reaction tank lowest water level place and is provided with the delivery port 4 that is used to connect drainpipe; Another side is lower than overflow crest of weir 3 and is communicated with water header 5, and its top communicates with atmosphere by air bleeding valve 6.One group many level set water pipes 7 are respectively in water header 5 both sides and are communicated with water header 5, and its downside is provided with a plurality of vertical short tubes 8, and its crest of weir downwards and be submerged in the reaction tank water.

In continuous water inlet, intermittent aerating technology, reaction tank precipitation and eliminating supernatant are that alternate cycles is carried out, as long as press the keying of following programme-control air bleeding valve, can get rid of supernatant or stop to get rid of supernatant by U-shaped pipe and drainpipe;

When 1, a last circulation drainage procedure finished, air bleeding valve was in opening, strains hydrophone and is communicated with atmosphere, and the reaction tank water level is in minimum point;

2, close air bleeding valve, the reaction tank water level rises, but because inner air tube pressure raises, causes vertical short tube water level of level set water pipe and reaction tank water level to form potential difference;

3, the reaction tank precipitation finishes, when reaction tank is in peak level, opens air bleeding valve, and the vertical short tube water level of level set water pipe rises, and the reaction tank supernatant is promptly discharged outside the reaction tank by U-shaped pipe and drainpipe, and the reaction tank water level begins to reduce.

4, close air bleeding valve, strain hydrophone and atmosphere and cut off, the reaction tank water level continues to be reduced to the level set water pipe when following, and the reaction tank supernatant still can continue discharge by siphonage;

5, when the reaction tank water level is reduced to lowest water level, open air bleeding valve, siphonage is destroyed and stop to get rid of supernatant, finishes this circulation.

In sum, simple in structure, the easy to operate and no-rotary part of the utility model, it is effective not only to strain water, and economical operation, fault rate are low, so be particularly suitable for straining hydrophone as the sbr reactor pond.

Claims

1, a kind of siphonic decant device is characterized in that being made of U-shaped pipe, water header and one group of level set water pipe; Described U-shaped pipe is a U-shaped, be installed on the concrete foundation at the bottom of the reaction tank, one side top is the overflow crest of weir, is lower than reaction tank lowest water level place and is provided with the delivery port that is used to connect drainpipe, another side is lower than the discharge crest of weir and is communicated with water header, and its top communicates with atmosphere by air bleeding valve; Described level set water pipe is respectively in the water header both sides and is communicated with water header, and its downside is provided with a plurality of vertical short tubes, and its crest of weir downwards and be submerged in the reaction tank water.