Glass fibre wastewater pretreatment method

Abstract

The invention relates to a pretreatment method of glass fiber wastewater, which comprises the following steps: B. a kieselguhr solution is added in a glass fiber wastewater reaction pool so as to be fully reacted with the wastewater; C. the wastewater is pumped to an air flotation water purifier, a coagulant aid is added into the intake of the air flotation water purifier, the wastewater and the coagulant aid are mixed with part of small bubbles which carry positive charges and are produced by a gas-dissolving system, so that the small bubbles can be adsorbed by pollutants in the coagulant aid and the wastewater, can enter an air flotation water distribution system in a bridging way and can realize solid-liquid separation. Following the step C of the invention, a step D can also be set, which removes scum pollutants floating after separation, solid materials flow automatically to a scum pool, and clear water separated to the bottom is automatically discharged into a clear water pool. A step E can also be set after the step D, wherein, the scum in the scum pool is sent to a sludge dewatering system by a sludge pump for carrying out dewatering treatment. The method of the invention reduces the occupation area of a wastewater pretreatment plant, saves costs on wastewater treatment, and causes the glass fiber wastewater to reach the national third-level discharge standard by one-time physicochemical treatment.

Description

Technical field: [0001] The invention relates to a glass fiber wastewater pretreatment method, which is mainly used for protection in the glass fiber production process. Background technique: [0002] Glass fiber wastewater is a kind of organic wastewater, and its properties are related to the type of wetting agent contained. Generally, wetting agents can be divided into three categories: ①starch type; ②enhanced type; ③paraffin type. The chemical composition of these three types of sizing agents is very different. Even for the same type of sizing agent, due to the different uses of the product, the formula of the chemical composition is also very different. A certain amount of emulsifiers must be added to all kinds of wetting agents. Most of these emulsifiers contain surface active substances, some of which are ionic and non-ionic. Under the action of the emulsifier, the wastewater is in the state of fine particles, which are evenly distributed in the water. At the same ti...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem of large fluctuations in the water quality of glass fiber wastewater, to reduce the floor area of ​​the wastewater pretreatment station, and to save the cost of wastewater treatment chemicals. Glass fiber wastewater pretreatment method

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