Pipeline coagulation method for rapidly reducing outfall pollution

Abstract

The invention relates to a pipeline coagulation method for quickly reducing outfall pollution. The method comprises the following steps: adding a coagulant and a flocculant into a tail-end drainage pipeline, and directly carrying out coagulation and flocculation in the tail-end drainage pipeline. Compared with the prior art, the tail-end drainage pipeline is used for carrying out mixing and coagulation flocculation reaction on sewage, so that the subsequent treatment time can be greatly shortened, the treatment efficiency is improved in a disguised manner, rapid discharge of redundant rainwater and sewage mixed water can be realized in rainy days, and urban drainage is not influenced; the space of a tail-end drainage pipeline is utilized, a subsequent mixing tank and a subsequent reactiontank are omitted, the occupied area is reduced by 32.6%-75%, and an effective reference method is provided for an urban drainage system with land shortage; and the response time of the reaction tank is saved while a coagulation and flocculation reaction tank is omitted, so that the total response time is shortened, and the stability of the effluent quality is accelerated.

Description

technical field [0001] The invention belongs to the technical field of ecological environment protection, and relates to a pipeline coagulation method for quickly reducing the pollution caused by discharging rivers. Background technique [0002] Black and odorous urban rivers are one of the most prominent environmental problems in China today, and the pollution load discharge of the drainage pipe network is an important cause of black and odorous urban water bodies. overflow) pollution will lead to the problem of black and smelly rivers. Domestic and foreign measures to control pollution from river discharge mainly include four categories: source control, pipeline system control, storage regulation and storage, and terminal treatment. [0003] Among them, terminal treatment, as an effective supplementary measure to reduce the pollution load discharged into the river, has gradually attracted widespread attention. At present, the methods used for terminal treatment mainly in...

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Problems solved by technology

Among them, coagulation-flocculation is one of the most common wastewater treatment methods, because of its low cost, simple operation and high efficiency, it has been applied in the pollution control of overflow and river discharge, but there are still problems such as relatively long processing time and relatively large area. Large size, long start-up time, etc.

The residence time of the coagulation and sedimentation process is at least 15 minutes, generally more than 30 minutes; and the area required for the mixing tank, reaction tank, and sedimentation tank is relatively large, and it is still difficult to apply it to cities with tight land use; moreover, the coagulation and sedimentation process The start-up response time is generally more than 30 minutes. The quality of the effluent water during the start-up time is poor, and the rainfall event often does not last long, and the process only runs when it rains. The nature of its repeated intermittent operation makes each operation have a response time, so it is slow. The start-up response of the

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