Low-emission papermaking wastewater processing and comprehensive utilization method

A papermaking wastewater, low-emission technology, applied in the process of wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc. effect, elimination of pollution, effect of reducing dosage

Pending Publication Date: 2017-07-14
ZHEJIANG RONGSHENG PAPER IND HLDG
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing technologies of wastewater treatment in papermaking enterprises are mainly primary and secondary treatment, such as sedimentation or air flotation, anaerobic or aerobic activated sludge method, etc., because the treatment degree is not deep, the suspended solids and dissolved wastewater cannot be removed efficiently It is generally difficult to achieve a high proportion of treated water reuse, and the wastewater discharged per ton of paper is generally more than 8-10 tons, so the problem of large wastewater discharge and heavy pollution load is still very prominent
Due to the use of sizing and various chemical additives in the current papermaking system, the pH value of the white water system is relatively low, generally between 5.5-6.0, which is relatively acidic. The use of chemical additives such as filters has a great influence on the effect. Due to the unsatisfactory effect, the amount of retention and drainage aids is large, which increases the cost of use and the pollution of discharged wastewater; the acidic white water system also affects the quality of paper products. , reduce the physical strength of paper products; increase the corrosion of equipment, and make the white water system smelly, polluting the operating environment
In the prior art,

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low-emission papermaking wastewater processing and comprehensive utilization method
  • Low-emission papermaking wastewater processing and comprehensive utilization method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0026] The application principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Such as figure 1 As shown, the low-emission papermaking wastewater treatment and comprehensive utilization method provided by the embodiment of the present invention includes the following steps:

[0028] S101: The white water in the wire section of the paper machine is recycled through the internal white water in the production. The excess papermaking wastewater is firstly treated by inclined nets and high-efficiency shallow air flotation to recover fine fibers and fillers for th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of wastewater processing and comprehensive utilization, and discloses a low-emission papermaking wastewater processing and comprehensive utilization method. Residual papermaking wastewater, reused by plain boiled water in an inner production part, of paper machine net part plain boiled water is firstly subjected to fine fiber and filler recovery through an inclined wire and efficient shallow-layer air-flotation processing for producing corrugating base paper and bobbin paper, and the processed wastewater is subjected to on-line calcium removal to enter an UMIC anaerobic processing system to remove most parts of COD (Chemical Oxygen Demand); the processed wastewater is subjected to aerobic processing with an activated sludge method, and sludge processed by processing is used for making bricks after being subjected to filter pressing; aerobic processing reclaimed water is divided into three parts, wherein the reclaimed water 1 is mixed with the paper machine net part plain boiled water to be reused, the reclaimed water 2 is subjected to deep processing, and the reclaimed water 3 enters a city pipe network to be subjected to nanotube processing to be discharged. According to the method, the fresh water use amount of papermaking can be reduced, a wastewater emission amount is reduced, pollution discharge is lightened, the use efficiency of chemical additives in a production process is improved, and equipment corrosion is lightened.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment and comprehensive utilization, and in particular relates to a low-emission papermaking wastewater treatment and comprehensive utilization method. Background technique [0002] As we all know, the papermaking process consumes a lot of fresh water, discharges a lot of waste water, and causes serious pollution. With the continuous strengthening of people's awareness of environmental protection, the requirements for paper industry wastewater and pollution discharge are becoming more and more stringent. At present, the existing technologies of wastewater treatment in papermaking enterprises are mainly primary and secondary treatment, such as sedimentation or air flotation, anaerobic or aerobic activated sludge method, etc., because the treatment degree is not deep, the suspended solids and dissolved wastewater cannot be removed efficiently It is generally difficult to achieve a high propo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F9/14D21F1/66C02F103/28
CPCD21F1/66C02F9/00C02F1/001C02F1/24C02F1/441C02F1/444C02F1/52C02F1/70C02F3/12C02F3/28C02F5/10C02F2103/28Y02E50/30
Inventor 赵会芳陆祥根沙力争沈筱琴徐强杨安徽陈华
Owner ZHEJIANG RONGSHENG PAPER IND HLDG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products