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Checkgate apparatus and control method of accurately distributing inflow water for sewage treatment

A sewage treatment and water inlet weir technology, which is applied in the field of weir gate devices, can solve the problem that the biological denitrification and phosphorus removal functions cannot achieve the expected results, cannot accurately measure the water distribution and accurately adjust the flow, and cannot distribute the anaerobic and anoxic sections. Water and other problems, to achieve the effect of low cost, high degree of automation, and good adjustment effect

Active Publication Date: 2011-10-26
BEIJING DRAINAGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in the actual operation process, which lead to the failure of the biological nitrogen and phosphorus removal functions to achieve the expected results.
There are the following problems: 1. The influent cannot be allocated to the anaerobic and anoxic sections in a timely and accurate manner, so that the carbon source in the influent cannot be used reasonably and effectively, and the treatment efficiency of nitrogen and phosphorus removal is low; 2. Some sewage treatment plants The biochemical section is equipped with a pipeline-type ram or an ordinary ram water inlet and distribution device, but there are problems that it is impossible to accurately measure the water distribution and accurately adjust the flow

Method used

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  • Checkgate apparatus and control method of accurately distributing inflow water for sewage treatment
  • Checkgate apparatus and control method of accurately distributing inflow water for sewage treatment
  • Checkgate apparatus and control method of accurately distributing inflow water for sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: The weir gate device for accurately distributing the water inlet for sewage treatment is equipped with a weir gate assembly, a driving and transmission device, and an ultrasonic liquid level gauge, and is characterized in that: the weir gate assembly is provided with a weir gate guide rail 1 The main board 2, the two sides of the weir door main board can be slidably connected on the guide rail up and down, the weir door main board is provided with an orifice 3, and the orifice is provided with a sealing plate 31 which is easy to disassemble. Sealing strip; the guide rail of the weir gate is vertically fixed on the inner side of the water inlet weir of the biological treatment unit 32, and the water inlet weir of the biological treatment unit is the weir of the water inlet channel, so the position of the guide rail of the weir gate and the main board of the weir gate is in the water inlet channel On the outside of the weir mouth, the bottom of the biological...

Embodiment 2

[0037] Weir door width b=1300mm, height 1000mm, orifice size 2×250×400mm, and the orifice is 0.2m away from the weir crest; the sewage treatment plant is in a relatively stable operation state, with moderate water volume, and only the orifice is submerged to flow out of the water distribution weir gate ;

[0038] 1) Set the time interval for water inflow detection and adjustment to 10 minutes, and the allowable flow difference is 10% of the reasonable inflow flow;

[0039] 2) The measured process needs to determine the weir gate water distribution is 1250m 3 / h;

[0040] 3) It is determined that the weir gate water intake is the second case, and H is calculated by formula 1-22 0.4m;

[0041] 4) The water level on the weir measured by the ultrasonic liquid level gauge is 6.7m, the water level in the biological reaction tank is 5.9m, and the weir crest elevation is calculated to be 6.7m; adjust the weir gate to the 6.7m elevation through the weir gate electric device; then sta...

example 3

[0043] Weir gate width b=1300mm, height 1000mm, orifice size 2×250×400mm, and the distance between the orifice and weir crest is 0.2m. The sewage treatment plant operates during the day, the water volume is large, and the flow of the water distribution weir gate is also large;

[0044] 1) Set the time interval for water inflow detection and adjustment to 10 minutes, and the allowable flow difference is 10% of the reasonable inflow flow;

[0045] 2) The measured process needs to determine the water distribution of the weir gate to be 3100m 3 / h;

[0046] 3) It is determined that the weir gate water intake is situation 3, and H is calculated by formula 1-3 1 The water head above the weir is 0.3m, H 2 0.7m;

[0047] 4) The water level on the weir measured by the ultrasonic liquid level gauge is 6.7m, the water level in the biological reaction tank is 5.9m, and the calculated weir crest elevation is 6.4m; adjust the weir gate to the 6.4m elevation through the weir gate electri...

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Abstract

The invention relates to a checkgate apparatus and a control method of accurately distributing inflow water for sewage treatment. The apparatus is characterized in that: the apparatus comprises a checkgate assembly, a driving and transmission device, ultrasonic wave liquid indicators, a checkgate guide rail and a checkgate main board; the checkgate main body is provided with apertures and seal plates; and the driving and transmission device comprises a support which is arranged above the guide rail and comprises stand columns and a crossbeam, a controllable motor, a transmission connecting rod, and a controller which has a signal connection with the liquid indicators and a control connection with a power device. The control method comprises the following steps: 1, setting a time interval of water inflow detection and adjustment; 2, detecting reasonable water inflows of each biological processing unit; 3, determining three cases of inflow water passing through the checkgate; and 4, comparing reasonable water inflows of each biological processing unit obtained in step 1 with real water inflows of current weir crest obtained in step 2 through calculating, and processing. The apparatus which is suitable for sewage treatment has the advantages of simple technology, energy saving, low cost, high automaticity, high water discharge efficiency and good quality.

Description

technical field [0001] The invention relates to a weir gate device for controlling and adjusting water volume, in particular to a sewage treatment unit of a sewage treatment plant, and an adjustment and control device for rationally distributing influent water volume to biological treatment units with different functions in a biological reaction tank. Background technique [0002] Many sewage treatment plants in China mostly use the traditional activated sludge process as the main process of sewage treatment. The traditional activated sludge process includes AAO, oxidation ditch and other processes. The sewage treatment plants using these processes generally consider the function of biological nitrogen and phosphorus removal at the beginning of design. However, there are many problems in the actual operation process, which lead to the failure of the biological nitrogen and phosphorus removal functions to achieve the expected results. There are the following problems: 1. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 王佳伟卢长松蒋勇甘一萍胡俊周军常江
Owner BEIJING DRAINAGE GRP CO LTD