Regenerated papermaking wastewater treatment system

A wastewater treatment system and waste paper papermaking technology, applied in the field of papermaking, can solve problems such as increased soluble COD, increased difficulty in papermaking wastewater treatment, and reduced water consumption

Inactive Publication Date: 2015-11-04
怀宁县天元纸业有限公司
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Problems solved by technology

At the same time, in order to reduce pollution and save power consumption, the current papermaking workshop has established a white water circulation system. The water consumption of the system has been greatly reduced and the degree of closed c...

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  • Regenerated papermaking wastewater treatment system

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Embodiment Construction

[0012] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings and examples. The following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present invention.

[0013] Such as figure 1 As shown, it is a structural schematic diagram of an embodiment of the present invention, a waste paper papermaking wastewater treatment system, including inclined screen, primary sedimentation tank, strengthening tank, secondary sedimentation tank, air flotation tank, filter, sludge concentration tank, sewage Mud anaerobic digestion tank and filter press, the inclined screen, primary settling tank, strengthening tank, secondary settling tank and air flotation tank are connected through pipelines in sequence, and the sludge thickening tank and sludge anaerobic digestion tank are connected through pipelines in sequence, The stre...

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Abstract

The invention discloses a regenerated papermaking wastewater treatment system. The regenerated papermaking wastewater treatment system comprises an inclined screen, a primary settling tank, a reinforcing tank, a secondary settling tank, an air floatation tank, a filter, a sludge thickener, a sludge anaerobic digester and a filter press. The inclined screen, the primary settling tank, the reinforcing tank, the secondary settling tank and the air floatation tank are sequentially connected through pipelines. The sludge thickener and the sludge anaerobic digester are sequentially connected through a pipeline. The reinforcing tank comprises an acid water dissolution tank and an oxygen tank. The filter is arranged between the air floatation tank and the sludge thickener. The filter press is connected with the sludge anaerobic digester. A large number of clean and impurity-free hot water working media can be recycled, water temperature is high, the hot water working media can be directly fed into a boiler to be recycled without chemical water treatment, therefore, production cost is reduced, and the purposes of saving energy and reducing consumption are achieved.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a waste paper and papermaking wastewater treatment system. Background technique [0002] The wastewater discharged by papermaking enterprises mainly contains pollutants such as hemicellulose, lignin, inorganic salts, fine fibers, starch, titanium dioxide, ink, and fuel. Lignin, hemicellulose, starch, etc. mainly form CODcr, BOD5 and suspended solids in wastewater; fine fibers mainly form suspended solids. The pollution load of production wastewater discharged from waste paper and papermaking is relatively high, but the BOD5 value is low, so the biodegradability is poor. However, since insoluble CODcr usually accounts for most of the COD composition in this type of wastewater, when the suspended matter in the wastewater is removed, most of the insoluble CODcr is also removed at the same time. Therefore, for this kind of wastewater, the pretreatment of wastewater should be st...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/28
Inventor 江昊
Owner 怀宁县天元纸业有限公司
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