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Paper pulping bleaching and waste water purification integration technology

A technology for wastewater purification and pulping, which is applied in pulp bleaching, papermaking, textiles and papermaking, etc., can solve the problems of low investment, high treatment cost and high cost, and achieves reduction of pulp washing water consumption, production cost reduction, and short production process. Effect

Inactive Publication Date: 2009-12-09
XIAN TONGRUN BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment of pollution problems in the papermaking industry is based on the end-of-line treatment thinking mode, trying every means to treat the pulping sewage, but this way of end-of-line treatment has many problems, and the treatment effect is not ideal
The status quo is: if you want to have a better treatment effect, you need very complicated and expensive sewage treatment equipment, and the treatment cost is very high; the other is that the investment is small, but it is difficult to meet the treatment requirements, which makes the paper industry in a very embarrassing situation. status

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, an integrated papermaking pulping bleaching and wastewater purification process, the process steps include a papermaking pulping bleaching process section and a wastewater purification process section;

[0032] The pulping and bleaching process section of papermaking includes the following steps:

[0033] 1) Cut the prepared 1000 kg of wheat straw or straw into 3-4cm pieces or shreds for later use;

[0034] 2) According to the liquid-to-material ratio of 5:1, calculate the required amount of water as 5000 kg for standby, then add these amounts of water into the mixing tank and start heating;

[0035] 3) under normal pressure, when the heating temperature reaches 40°C, add papain in the stirring tank, the amount of addition is 0.001umol / L, add pulping bleaching agent NaOH, its consumption is 0.05% based on dry pulp weight, and then Add the above-mentioned spare wheat straw or straw into the mixing tank and start stirring;

[0036] 4) Continue heating, and...

Embodiment 2

[0042] Embodiment 2, an integrated papermaking pulping bleaching and wastewater purification process, the process steps include a papermaking pulping bleaching process section and a wastewater purification process section;

[0043] The pulping and bleaching process section of papermaking includes the following steps:

[0044] 1) Cut the prepared 1000 kg of wheat straw or bagasse raw materials into 3-4cm pieces or shreds for later use;

[0045] 2) According to the liquid-to-material ratio of 6:1, calculate the required amount of water as 6000 kg for standby, then add this amount of water into the mixing tank and start heating;

[0046] 3) When the heating temperature reaches 40°C under normal pressure, add lignin peroxidase to the stirring tank in an amount of 0.03umol / L, add pulping bleaching agent NaOH, dodecyl penetrant, the amount 0.09% based on dry pulp weight, then add the above-mentioned standby wheat straw or bagasse into the mixing tank and start stirring;

[0047] 4...

Embodiment 3

[0053] Embodiment 3, an integrated papermaking pulping bleaching and wastewater purification process, the process steps include a papermaking pulping bleaching process section and a wastewater purification process section;

[0054] The pulping and bleaching process section of papermaking includes the following steps:

[0055] 1) Cut the prepared 1000 kg reed or / and grass reed into 3-4cm pieces or shreds for later use;

[0056] 2) According to the liquid-material ratio of 7:1, calculate the required water volume as 7000 kg for standby, then add the water into the mixing tank and start heating;

[0057] 3) When the heating temperature reaches 40°C under normal pressure, add ligninase and hydrogen peroxide generating enzyme to the stirring tank, the amount added is 10.00umol / L, add pulping bleaching agent NaOH, absolute ethanol, anthraquinone , and its consumption is 1.0% based on dry pulp weight, then above-mentioned spare reed or / and grass reed are added in the mixing tank and...

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Abstract

A paper pulping bleaching and waste purification integration technology comprises two technology stages of paper pulping bleaching and waste water purification; wherein the paper pulping bleaching technology stage comprises: (1) slicing; (2) solution preparing; (3) initial reaction by adding enzyme and medicament; (4) deep reaction by adding medicament; (5) sieving, sedimentation and grinding; and (6) pulp washing, bleaching and stabilizing to obtain paper pulp finished product; and the waste water purification technology stage comprises: (1) purification, sedimentation and separation; and (2) concentration, drying and sediment recovery. The invention combines chemistry and biology, pulping and bleaching are completed in the same container in an integration way, neither chorine element is required nor black liquor is produced during pulping and bleaching, COD, BOD, SS and chrominance in pulping water are reduced to the utmost extent, waste water of pulping can be reused in pulp washing after purification treatment, and finally zero discharge or standard discharge of the whole waste water of pulping is realized.

Description

technical field [0001] The invention relates to a papermaking pulping process, in particular to an integrated papermaking pulping bleaching and wastewater purification process. Background technique [0002] The pollution of the paper industry has become a worldwide problem. In order to solve this problem, many experts and scholars at home and abroad have been actively conducting relevant research and discussion for many years. At present, the treatment of pollution problems in the paper industry is based on the end-of-line treatment thinking mode, and every method is tried to control the pulping sewage. However, this end-of-line treatment method has many problems, and the treatment effect is not ideal. The status quo is: if you want to have a better treatment effect, you need very complicated and expensive sewage treatment equipment, and the treatment cost is very high; the other is that the investment is small, but it is difficult to meet the treatment requirements, which ...

Claims

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Application Information

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IPC IPC(8): D21C3/22C12S3/08D21C9/10D21C11/00D21C9/16D21H11/12C02F1/52
Inventor 范晓民刘依勤
Owner XIAN TONGRUN BIOTECH
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