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Sewage treatment method in paper friction material production

A technology of paper-based friction material and sewage treatment method, which is applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, processing wastewater treatment, etc., and can solve the problem of ineffective cost control and difficulty in controlling the overall adsorption effect, etc. problem, to achieve the effect of omitting the pH value callback step, easy to obtain, and realize recycling

Active Publication Date: 2010-12-08
陕西航沣新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the inability of the existing technology to effectively control the cost and the difficulty in controlling the overall adsorption effect, the present invention provides a sewage treatment method using layered filtration and composite fillers to realize the removal of fibers, small inorganic particles and a small amount of inorganic waste in the sewage of paper-based friction materials. , Absorption and adsorption of organic solvents, simple, efficient and low-cost treatment of production sewage, to meet the water cycle of industrial production of paper-based friction materials, and truly achieve the green production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. Pulverize the scraps from the production process of paper-based friction materials in a high-speed pulverizer, pass through an 80-mesh sieve after pulverization, and save the main fiber pulverization.

[0016] 2. The main fiber pulverized matter and the added inorganic SiO 2 The small particles (diameter between 425-850 μm) are made into a composite filler layer according to the volume fraction ratio of 12:1.

[0017] 3. The filling sequence of each filter layer in the device is 80 mesh nylon screen from bottom to top, 5cm fine sand layer (particle size is 425μm to 850μm), 80 mesh nylon screen, 30cm composite packing layer, iron screen (screen Eye diameter greater than 850μm), 15cm large particle SiO 2 filler layer.

[0018] 4. Pass the sewage to be treated through each filter layer in turn from top to bottom. After filtering, the treated water can flow back to the slicing machine through the pipeline to realize the recycling of sewage.

Embodiment 2

[0020] 1. Pulverize the scraps from the production process of paper-based friction materials in a high-speed pulverizer, pass through a 60-mesh sieve after pulverization, and save the main fiber pulverization.

[0021] 2. The composite filler layer is made of the main fiber pulverized matter after crushing the corner waste of the paper-based friction material and the added inorganic SiO2 small particles according to the volume fraction ratio of 10:1.

[0022] 3. The filling order of each filter layer in the device is from bottom to top: 60-mesh nylon screen, 3cm fine sand layer (particle size is 425μm to 850μm), 60-mesh nylon screen, 24cm composite packing layer, iron screen (screen Eye diameter greater than 850μm), 12cm large particle filler layer.

[0023] 4. Pass the sewage to be treated through each filter layer in turn from top to bottom. After filtering, the treated water can flow back to the slicing machine through the pipeline to realize the recycling of sewage.

Embodiment 3

[0025] 1. Pulverize the scraps from the production process of the paper-based friction material in the high-speed state of the pulverizer, pass through a 40-mesh sieve after pulverization, and save the main fiber pulverization.

[0026] 2. The main fiber pulverized matter and the added inorganic CaCO 3 The small particles (with a diameter between 425 and 850 μm) are made into a composite filler layer at a ratio of 6:1 by volume fraction.

[0027] 3. The filling sequence of each filter layer in the device is 40 mesh nylon screen from bottom to top, 2cm fine sand layer (particle size is 425 μm to 850 μm), 60 mesh nylon screen, 15cm composite packing layer, iron screen (sieve Eye diameter greater than 850μm), 8cm large particle filler layer (CaCO 3 Particles, particle diameter greater than 850 μm).

[0028] 4. Pass the sewage to be treated through each filter layer in turn from top to bottom. After filtering, the treated water can flow back to the slicing machine through the p...

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Abstract

The invention relates to a sewage treatment method in the production of paper base friction materials. The sewage treatment method comprises the following steps: passing the crushed edge scraps and wastes produced during the production of the paper base friction materials through a screen, and keeping main crushed fiber objects; evenly mixing the main crushed fiber objects and inorganic finely ground particles through a wet method so as to prepare a composite filler; respectively filling the filtering layers of a nylon screen, a 2-5 cm fine sand layer, a nylon screen, a 15-30 cm composite filler layer, an iron screen and a 8-15 cm inorganic macro aggregate filler layer in turn from bottom to top; and passing the sewage to be treated through the filtering layers in turn from top to bottom,and reflowing the treated water to a sheet-making machine through a pipeline after filtration so as to realize the cyclic utilization of the sewage. The method omits the step of pH value readjustment, and makes the raw material in a processing device be easily obtained while simultaneously making full use of the raw material in the production of the paper base friction materials.

Description

technical field [0001] The invention relates to a method for treating industrial production sewage for producing paper-based friction materials. Background technique [0002] Paper-based friction material is a kind of friction material mainly composed of fibers, binders, friction performance modifiers, fillers, etc. and produced by papermaking technology. It has the advantages of high friction coefficient, smooth and soft joint, low noise, and less damage to the pairing disc, etc., and has been more and more widely used in modern machinery. In the process of producing paper-based friction materials, industrial wastewater containing filler particles, metal oxides and fibers will inevitably be produced due to the wet pulping and molding process. The wastewater contains a certain amount of inorganic soluble matter, organic Discharge of soluble matter and fine suspended matter without treatment will have a certain impact on external water sources. [0003] There are no reports...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/06C02F9/02C02F103/28
CPCY02W30/62
Inventor 李贺军杨国盛付业伟费杰
Owner 陕西航沣新材料有限公司
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