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Sewage treatment plant aerated grit system control apparatus and control method thereof

A sewage treatment plant, aeration and grit deposition technology, applied in the direction of flocculation/sedimentation water/sewage treatment, separation methods, chemical instruments and methods, etc., can solve problems such as inoperability, uneven sedimentation, sand deposition, etc., to avoid excessive operation, improve the treatment effect, avoid the effect of aeration

Inactive Publication Date: 2013-07-17
BEIJING DRAINAGE GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in urban sewage treatment plants, sand removal is an important pretreatment link. If the mud and sand in the sewage are not removed, they will be deposited in the subsequent treatment units or channels, causing excessive wear and tear on the equipment, and seriously affecting the effect of subsequent sewage treatment.
The amount of mud and sand increases with the increase of influent water. When the influent load is high, the aeration rate is too high, which will cause the sand particles to enter the subsequent treatment process without sedimentation; Deposition, uneven precipitation, affecting the normal operation of sand suction equipment
The sand suction truss truck is an important equipment in the aeration and sand settling system. When the sand volume increases, the sand suction pump may be buried and cannot operate; when the sand volume decreases, the continuous operation of the sand pump will cause waste of electric energy.

Method used

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  • Sewage treatment plant aerated grit system control apparatus and control method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: Referring to the accompanying drawings, the control device of the aeration sand settling system of the sewage treatment plant is provided with an aeration sand settling tank 6, and the water inlet pipe 2 in front of the aeration sand settling tank is connected to the sewage water inlet pump room of the sewage treatment plant, and the back The outlet pipe is connected to the primary sedimentation tank or biological reaction tank of the sewage treatment device; the bottom of the aeration grit chamber is provided with an aeration head connected with the blower, the bottom of the tank under the aeration head is provided with a sand collecting tank, and the aeration grit chamber is located in the middle. There is a movable trolley 5, and the movable truss is equipped with two sand pumps 1, which are characterized in that: a controllable electric valve 10 and a gas flow meter 9 are arranged on the pipeline connecting the aeration head and the blower 8; A current ...

Embodiment 2

[0021] Embodiment 2: the control method of the control device of the aeration and sedimentation system of the sewage treatment plant:

[0022] 1) Start the control device, set the gas-water ratio as GWRSET as 0.3, and the valve maximum flow VFMAX as 4m 3 / s, the maximum comparison difference of intake air volume is GMAX 0.4, the comparison interval time T1 is 20 minutes, T2 is 30 minutes, and the maximum flow rate of water intake WINMAX is 10m 3 / s, the operating time base M of the trolley is 60 minutes, the maximum current I of the sand pump in normal operation is 8A, and the maximum operating current IMAX of the sand pump under high load is 11A;

[0023] 2) When the control device runs for a comparison time T1=20 minutes, the controller collects the current influent flow signal WIN1=8m 3 / s, intake air flow signal GIN1=2m 3 / s; Calculate valve opening L=WIN*GWRSET / VFMAX=60%, load factor N=WIN / WINMAX=0.8, crane running time T3=N*M=48 minutes

[0024] 3) WIN1*GWRSET-GIN1=8*...

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Abstract

The invention discloses a sewage treatment plant aerated grit system control apparatus and a control method thereof. The apparatus comprises an aerated grit pool, and a pipeline communicating an aerated head with a blower in the aerated grit pool is provided with a controllable motor valve and a gas flow meter; a flow monitor relay is arranged in a control system of sand pumps and a truss; and a water inlet tube is provided with a liquid flow meter, and is also provided with a controller which is in signal and control connection with the gas flow meter, the controllable motor valve, the liquid flow meter and the current monitor relay. The control method comprises the following steps: 1, starting the controller, and setting control vales; 2, acquiring signals of the controller when the control apparatus runs for a running time of T1; 3, adjusting the opening degree of the motor valve; 4, controlling the running time of the truss at T3; 5, controlling the normal running or stopping or fault alarming of the truss; and 6, repeating step 2-5. The control apparatus and the control method are suitable the automatic control of the aerated grit pool, and have the advantages of processing effect improvement, maintenance of efficient stable running, safe and efficient equipment running, and obvious energy saving effect.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and is a control device and a control method for an aeration and sand settling system of a sewage treatment plant. Specifically, based on the influent flow rate, the operating efficiency of the sand-absorbing truss truck is improved, and the air-water ratio is optimized, so that the equipment Simultaneous optimization with the process to comprehensively improve the treatment effect of the aerated grit chamber. Background technique [0002] At present, in urban sewage treatment plants, sand removal is an important pretreatment link. If the mud and sand in the sewage are not removed, they will be deposited in the subsequent treatment units or channels, causing excessive wear and tear on the equipment, and seriously affecting the effect of subsequent sewage treatment. The amount of mud and sand increases with the increase of influent. When the influent load is high, the aeration rate is too...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D21/30B01D21/02C02F1/52
Inventor 王佳伟张建强高琼刘磊曹洪岩吴春江
Owner BEIJING DRAINAGE GRP CO LTD
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