Process for comprensive treating waste water of paper making by grass pulp

A technology for comprehensive treatment of papermaking wastewater, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of straw pulp and papermaking wastewater polluting the environment, and achieve reduction of pollution load, Pollution reduction and cost reduction effects

Inactive Publication Date: 2006-08-23
彭仲辉 +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a comprehensive treatment method for straw pulp papermaking wastewater in order to overcome the current situation that the existing straw pulp papermaking wastewater seriously pollutes the environment

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
  • Process for comprensive treating waste water of paper making by grass pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] 1. Process of black liquor treatment plan:

[0073] 1. Circulate the black liquor produced by presoaking low-temperature rapid cooking in the homogenization tank for 24 hours, so that the temperature is reduced to 35°C and the pH is about 12.

[0074] 2. Pump the thick black liquor in the homogeneous tank to the pipeline, add No. 1 agent, add No. 5 agent at an interval of about 10 seconds, and then add No. 2 agent at an interval of 10 seconds, enter the reaction tank, and then add No. 3 agent After 30 seconds, add agent No. 4 and adjust the pH to 14 for cooking.

[0075] 3. Pump the dilute black liquor in the homogeneous tank to the pipeline for treatment according to the agent and interval time for treating thick black liquor. At this time, the pH of the clear liquid reaches 4-5, and it is reused for pulp washing. After washing the pulp, adjust the pH to 6.5-8.5 and use a pump to enter the upflow anaerobic activated sludge tank. After full anaerobic digestion, it ente...

Embodiment 2

[0092] 1. Process of black liquor treatment plan:

[0093] 1. Circulate the black liquor produced by presoaking low-temperature rapid cooking in the homogenization tank for 30 hours to reduce the temperature to 35°C and the pH to about 10.

[0094] 2. Pump the thick black liquor in the homogeneous tank to the pipeline, add No. 1 agent, add No. 5 agent at an interval of about 10 seconds, and then add No. 2 agent at an interval of 10 seconds, enter the reaction tank, and then add No. 3 agent After 30 seconds, add agent No. 4 and adjust the pH to 12 for cooking.

[0095] 3. Pump the dilute black liquor in the homogeneous tank to the pipeline for treatment according to the agent and interval time for treating thick black liquor. At this time, the pH of the clear liquid reaches 4-5, and it is reused for pulp washing. After washing the pulp, adjust the pH to 6.5-8.5 and use a pump to enter the upflow anaerobic activated sludge tank. After full anaerobic digestion, it enters No. 1 s...

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

A process for treating the sewage generated by making paper with straw pulp includes such steps as preimmersing by alkali method, adding activating agent prepared from anthraquinone derivative, sodium alkylphenylsulfonate and epoxy ethane, fast low-temp digestion, adding 5 kinds of flocculant sequentially for separation, flocculating, decoloring, decomposing lignin and depositing, anaerobic digestion, aerobic aerating, cleaning by biomembrane, and dewatering dregs to obtain fertilizer.

Description

technical field [0001] The invention provides a method for comprehensive treatment of papermaking wastewater, in particular to a method for comprehensive treatment of straw pulp papermaking wastewater. Background technique [0002] For a long time, the treatment technology of straw pulp papermaking wastewater, which has caused serious pollution to the environment, has not been well resolved. The reason is that the one-time project investment of alkali recovery technology is large, which is difficult for many enterprises to bear. In addition, due to the interference of straw pulp black liquor silicon and other reasons, the extraction rate of straw pulp black liquor is low, and the concentration and calorific value cannot meet the technical requirements. The alkali recovery of straw pulp cannot run stably for a long time, the cost of alkali recovery is too high, and the actual production effect is not ideal. At present, the existing black liquor treatment technologies in Chin...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F9/14C02F3/30C02F3/02C02F3/28
CPCY02W10/10
Inventor 彭仲辉汪中军邓伯圭罗济华徐勇清
Owner 彭仲辉
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap