A kind of treatment method of nitro bamboo cellulose washing wastewater

A treatment method, cellulose technology, applied in water/sewage treatment, water treatment parameter control, chemical instruments and methods, etc., can solve sewage discharge and other problems, achieve good treatment effect, simple operation method, and solve sewage discharge problems Effect

Active Publication Date: 2021-10-29
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, this patent proposes a treatment method for nitrated bamboo cellulose washing wastewater, which is used to realize the recycling of nitrated bamboo cellulose washing wastewater, and effectively solves the sewage discharge problem in the preparation process of nitrated bamboo cellulose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of processing method of nitrated bamboo cellulose washing waste water, concrete steps are as follows:

[0018] Transfer 50kg of nitrobamboo cellulose washing wastewater to container A with a volume of 1000L, and inject the nitrocellulose cellulose alkali boiling wastewater into container A under the stirring state of container A, and monitor the pH value in container A during the injection process Change, when the pH value reaches the range of 7 to 8, stop injecting nitrocellulose alkali boiling wastewater into container A, and inject 825kg of alkaline boiling wastewater at this time; heat the temperature of container A to 50 ~ 70°C, stir for 10 ~30 minutes later, observe the pH value in container A again, and find that there is no change, and the pH value is still in the range of 7 to 8; transfer all the liquid in container A to vacuum evaporation container B, and in the state of stirring, vacuum Vacuumize the evaporation container B. Under continuous vacuuming,...

Embodiment 2

[0021] A kind of processing method of nitrated bamboo cellulose washing waste water, concrete steps are as follows:

[0022] Transfer 100kg of nitrobamboo cellulose washing wastewater to container A with a volume of 1000L, and inject the nitrocellulose cellulose alkali boiling wastewater into container A under the stirring state of container A, and monitor the pH value in container A during the injection process change, when the pH value reaches the range of 7-8, stop injecting nitrocellulose alkali-cooking wastewater into container A, and inject 525kg of alkaline-cooking wastewater in total at this time; heat container A to 50°C and stir for 30 minutes , observe the change of pH value in container A again, this moment, pH value is lower than 7, in container A, add 43kg of nitrocellulose alkali boiling waste water in container A, this moment, pH value reaches again in the scope of 7~8, Stop adding nitrated bamboo cellulose alkali-boiled waste water to container A; transfer the...

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PUM

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Abstract

The invention relates to a treatment method for nitrated bamboo cellulose washing wastewater, belonging to the technical field of environmental protection. Move the nitrocellulose cellulose washing wastewater to container A for stirring and inject the nitrocellulose cellulose alkali boiling wastewater; observe after heating and stirring the container A, if the pH value is lower than 7, stir and add the nitrocellulose cellulose alkali boiling wastewater, When the pH value is 7-8, stop adding liquid M; move the liquid M to the vacuum evaporation container B to stir and vacuumize to raise the temperature, and collect the liquid X at this time; after 2 to 5 minutes, collect the liquid Y at this time, Stop when the remaining liquid in the vacuum evaporation vessel B is 5-10% of the initial total amount, the remaining liquid Z; liquid X is used for washing nitrocellulose; liquid Y is used for alkali boiling of nitrocellulose; liquid Z is recovered Utilization; the nitrocellulose washing wastewater has been treated. The treatment method provided by the invention can realize the recycling of the nitrated bamboo cellulose washing waste water, and effectively solve the problem of sewage discharge in the preparation process of the nitrated bamboo cellulose.

Description

technical field [0001] The invention relates to a treatment method for nitrated bamboo cellulose washing wastewater, belonging to the technical field of environmental protection. Background technique [0002] Bamboo nitrocellulose is produced by nitrating cellulose with nitric acid mixed with sulfuric acid. It belongs to nitrate esters and is another source of nitrocellulose after nitrocellulose. Nitrocellulose has two major application fields, military and civilian. Its high nitrogen content is used to make single-base medicines, smokeless gunpowder, and fireworks; low nitrogen content is used to make spray paint, artificial leather, film, plastics, etc. my country is a big bamboo producing country in the world and has abundant bamboo resources, so nitrocellulose has a very broad production prospect. With the continuous increase of nitrocellulose fiber production, a large amount of nitrobamboo cellulose washing wastewater is continuously discharged, which brings serious en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10
CPCC02F1/048C02F1/66C02F2209/02C02F2209/06C02F2301/063
Inventor 刘吉平李年华李琪军刘克普吉伟生于保藏周天驰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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