Time-shared agent feeding control pipeline for wastewater treatment

Abstract

The invention belongs to the technical field of environment protection and relates to a time-shared agent feeding control pipeline for wastewater treatment. The time-shared agent feeding control pipeline comprises an agent distribution tank, a backflow pipe and an agent feeding pipe, the backflow pipe is connected from the lower portion of the agent distribution tank to the top of the agent distribution tank, and the agent feeding pipe is branched from a point of the backflow pipe. A plurality of branch feeding pipes are branched from the agent feeding pipe, a pneumatic valve is arranged on each branch feeding pipe, an air inlet of each pneumatic valve is connected to an air distribution device which comprises a shell and an inner core, and the inner core is pivoted into the shell which is provided with a plurality of air outlets connected with the pneumatic valves. The inner core is provided with an air supply passage, and the air supply passage is provided with an outlet which can be aligned to the air outlets and further provided with another outlet constantly connected with an air source. By the time-shared agent feeding control pipeline, agents can be distributed to each position requiring agent addition, flow scrambling of the branch feeding pipes is prevented, and feeding stability is realized.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a time-sharing control pipeline for wastewater treatment and dosing with accurate dosage of medicine. Background technique [0002] The physical and chemical treatment process of sewage is essentially a process of chemical reactions such as neutralization, flocculation and precipitation by adding various chemicals, and then degrading and removing harmful substances in sewage through various biochemical technologies. The process involves multiple process sections, and Each process section is designed with a multi-stage reaction tank. After the sewage is reacted step by step, the elimination and transformation of harmful substances or the conversion of insoluble substances into soluble substances are then removed through subsequent biochemical processes. The core of the physical and chemical treatment process It is the correct and stable delivery technology of vari...

AI Technical Summary

Problems solved by technology

Secondly, some dosing points have different design heights (different pool heights), and the dosing points of different heights have different requirements for raising the Yang Cheng

Thirdly, the pneumatic control valves of each delivery point are connected in parallel to the same drug main pipe. According to the basic principles of fluid mechanics, the fluid always flows to the place where the resistance of the pipeline is small, which results in the fact that when the drug is actually injected, each The opening / closing of the valve at the dosing point will affect the outflow of medicines at other dosing points, and even cause no medicine to flow out at other dosing points. The production cannot run stably and normally, and the standard discharge of effluent water cannot be guaranteed

Fourth, due to the principle of conventional automatic control, the valve opening / closing time of each agent dosing point is controlled based on the feedback data of the online detection instruments of the reaction pools at all levels, which makes the opening and closing of the valves at each dosing point impossible. To avoid the superposition of working status, the valves at different chemical dosing points may affect each other at any time and cause the phenomenon of "grabbing" flow

In the end, due to the above reasons, the dosage of the whole dosing system is unstable

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