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Multistage evaporating process in viscose production

A viscose fiber and stage evaporation technology, which is applied in evaporation, chemical instruments and methods, separation methods, etc., can solve the problems of heat loss and no better utilization, and achieve the effects of increasing temperature difference, improving efficiency, and increasing production capacity

Active Publication Date: 2011-06-22
CHENGDU GRACE FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to solve the problem that heat loss caused by six-effect evaporation in the prior art cannot be better utilized, and provides a multi-stage evaporation process in the production of viscose fiber, so that all heat can be utilized during evaporation, No waste, reduced energy consumption

Method used

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  • Multistage evaporating process in viscose production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A, acid bath heating: acid bath from the evaporation chamber V 8 enters, in the evaporation chamber V 8 and V 9 After evaporation and degassing in the medium, the temperature of the acid bath drops to 43°C, and the 3 / h into the preheater A 7 , and then through the preheater A 6 、A 5 、A 4 、A 3 、A 2 、A 1 , the temperature of the acid bath was preheated to 85°C, and then passed through the heater H 1 、H 2 Heating to 107°C; H 1 、H 2 Also equipped with a backup heater H 3 ;

[0034] B. Acid bath evaporation: the acid bath from the heater enters the pre-evaporation chamber V 1 , and then through the evaporation chamber V 2 , V 3 , V 4 , V 5 , V 6 , V 7 step-down evaporation, at V 7 Chamber acid bath temperature drops to 46°C, using potential difference from V 7 Out of the acid, it enters the lower tank of the acid bath;

[0035] C. Secondary steam recycling and discharge: in the secondary steam evaporated from each evaporation chamber, V 1 , V 2 , V ...

Embodiment 2

[0041] A, acid bath heating: acid bath from the evaporation chamber V 8 enters, in the evaporation chamber V 8 and V 9 After evaporating and degassing in the middle, the temperature of the acid bath drops to 46°C, and the temperature of the acid bath is reduced to 80m through the circulation pump. 3 / h into the preheater A 7 , and then through the preheater A 6 、A 5 、A 4 、A 3 、A 2 、A 1 , the temperature of the acid bath was preheated to 89°C, and then passed through the heater H 1 、H 2 Heating to 120°C; H 1 、H 2 Also equipped with a backup heater H 3 ;

[0042] B. Acid bath evaporation: the acid bath from the heater enters the pre-evaporation chamber V 1 , and then through the evaporation chamber V 2 , V 3 , V 4 , V 5 , V 6 , V 7 step-down evaporation, at V 7 The temperature of the chamber acid bath drops to 50°C, using the potential difference from V 7 Out of the acid, it enters the lower tank of the acid bath;

[0043] C. Secondary steam recycling and ...

Embodiment 3

[0049] A, acid bath heating: acid bath from the evaporation chamber V 8 enters, in the evaporation chamber V 8 and V 9 After evaporation and degassing in the medium, the temperature of the acid bath drops to 44°C, and the 3 / h into the preheater A 7 , and then through the preheater A 6 、A 5 、A 4 、A 3 、A 2 、A 1 , the temperature of the acid bath was preheated to 87°C, and then passed through the heater H 1 、H 2 Heating to 110°C; H 1 、H 2 Also equipped with a backup heater H 3 ;

[0050] B. Acid bath evaporation: the acid bath from the heater enters the pre-evaporation chamber V 1 , and then through the evaporation chamber V 2 , V 3 , V 4 , V 5 , V 6 , V 7 step-down evaporation, at V 7 Chamber acid bath temperature drops to 48°C, using potential difference from V 7 Out of the acid, it enters the lower tank of the acid bath;

[0051] C. Secondary steam recycling and discharge: in the secondary steam evaporated from each evaporation chamber, V 1 , V 2 , V ...

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Abstract

The invention relates to a multistage evaporating process in viscose production, which comprises the steps of acid bath heating, acid bath evaporating, secondary steam recycling and exhausting, condensed water discharging, incoagulable gas exhausting and the like. Aiming at the prior art, equipment and a process route are re-designed, secondary steam is recycled, the heat which is not utilized inthe prior art is fully utilized, so that the purpose of improving the yield is achieved, the zero emission of evaporating water is realized, and a large quantity of sewage treatment cost and clear water supply and discharge costs are saved.

Description

technical field [0001] The invention relates to a production process of viscose fiber, more specifically, the invention relates to a multi-stage evaporation process in the production of viscose fiber. Background technique [0002] During the production of viscose fibers, the viscose strands are formed in an acid bath. The quality of the filaments is directly related to the level of the various indicators of the acid bath. Improving the pass rate of the indicators of the acid bath and reducing the consumption of acid bath and energy have become the key factors for all manufacturers to improve product quality and reduce product production costs. important way. [0003] In the production of viscose fiber, the acid station is a workshop dedicated to continuously supplying a certain amount of acid bath that meets the process requirements to the spinning machine. The acid bath is also called a coagulation bath or a spinning bath, so the main task of the acid station is to The ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D1/00
Inventor 郭惠春文国洪
Owner CHENGDU GRACE FIBER
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