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Method for reducing loss of sulfonated carbon disulfide in stock solution

A technology for liquid sulfonation of carbon disulfide and carbon disulfide, applied in chemical instruments and methods, separation methods, chemical characteristics of fibers, etc., can solve the problems of high energy consumption, inability to improve the utilization rate of CS2, and inability to reduce the consumption of raw liquid sulfonation CS2

Active Publication Date: 2021-09-10
赛得利(江苏)纤维有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The patent whose publication number is CN105600857B discloses the degassing treatment process of alkaline wastewater in the production of viscose fiber, which uses a vacuum degassing system to treat H 2 S, CS 2 Centralized degassing of high-concentration alkaline wastewater requires high equipment investment and high energy consumption, and is only used to recover CS in the waste gas 2 , unable to improve CS in production 2 Utilization rate, unable to reduce stock solution sulfonated CS 2 wear and tear

Method used

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  • Method for reducing loss of sulfonated carbon disulfide in stock solution

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Effect test

Embodiment 1

[0033] A method for reducing the loss of stoste sulfonated carbon disulfide, comprising the following steps:

[0034] Stock solution workshop: by reducing the CS in the stock solution workshop 2 and improve the operating parameters of the KK-type filter in the raw liquid workshop. Adjust the air pressure control system and improve the structure of the KK-type filter. The air tightness of the machine, in which: the filter with good corrosion resistance is set as one of the metal rubber filter, nylon filter or metal filter, so as to improve the sulfonated CS 2 The utilization rate of the product can be reduced, the maturity of the product can be slowed down, the quality fluctuation of the finished product can be reduced, and the CS of the dope workshop can be reduced 2 loss. When the stock solution sulfonated CS 2 The addition rate decreased from 290kg / T to 278kg / T wire, and the ton wire decreased by 2.4kg / T wire. When the stock solution sulfonated CS 2 When the addition rat...

Embodiment 2

[0043] The procedure of this embodiment is the same as that of Example 1, the difference is that: the high-concentration carbon disulfide gas produced by the stock solution workshop, the spinning workshop and the acid station is connected to the condensation recovery system, and the stock solution workshop, the spinning workshop and the The direct discharge valve of the internal leakage of the acid station is used to reduce the concentration of the ambient exhaust air, thereby reducing the loss of carbon disulfide. The combined seal used is made of 316L stainless steel and graphite with strong corrosion resistance, so that the 2 Loss has dropped 0.31kg / T wire, all the other are identical with embodiment 1.

Embodiment 3

[0045] The steps of this embodiment are the same as those of Embodiment 2, except that the condensation recovery system includes a pretreatment device, a condensation treatment device and a secondary condensation treatment device, the pretreatment device is set as a long conduit for improving heat exchange efficiency, and the condensation The condenser tubes in the treatment device and the secondary condensation treatment device are made of glass fiber reinforced plastics to avoid fouling, and the cooling water outlets in the condensation recovery system are equipped with temperature sensors and pressure sensors. Steam pressure, increase the contact area between steam and fiber, increase cooling water and CS 2 The way of steam contact area improves condensation effect and reduces CS 2 Consume 0.42kg / T silk, all the other are identical with embodiment 2.

[0046] In summary, when the stock solution sulfonated CS 2 CS 2 The loss is reduced by 4.8kg / T silk; when the loss of wa...

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Abstract

The invention relates to the technical field of viscose fiber production, in particular to a method for reducing the loss of sulfonated carbon disulfide in stock solution. The method comprises the following steps of (1) reducing the loss of carbon disulfide in a stock solution workshop; (2) reducing the loss of carbon disulfide in a spinning workshop; (3) improving the carbon disulfide adsorption rate of a recovery system in the spinning workshop; (4) reducing the loss of carbon disulfide in a sewage treatment system; and (5) combining the steps (1) to (4) to improve the utilization rate of sulfonated CS2 and reduce the loss of the carbon disulfide. According to the method for reducing the loss of the sulfonated carbon disulfide in the stock solution provided by the invention, by controlling the use amount of CS2 per ton of filaments in the stock solution workshop, the utilization rate of the CS2 is increased, the loss of the sulfonated CS2 in the stock solution is reduced, meanwhile, the CS2 recovery rate is increased in combination with multiple modes for reducing the loss of the CS2 in the spinning workshop, the influence on the factory environment, sewage treatment and the social environment is reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of viscose fiber production, in particular to a method for reducing the loss of stock solution sulfonated carbon disulfide. Background technique [0002] Carbon disulfide (CS 2 ) is one of the important raw materials for viscose fiber production. It is usually necessary to control the purity and impurity content of carbon disulfide. The less dissolved sulfur in carbon disulfide is required in production, the better. If the dissolved sulfur content in carbon disulfide is high, various The increase of sulfides will easily pollute the acid bath, and the color of the filaments will turn yellow and the handle will be rough. The production process of viscose fiber is generally: feeding, alkalization, vacuuming, adding CS 2 , sulfonation, dissolution, and feeding, including raw liquid workshop, acid station workshop, spinning workshop, condensation recovery system and sewage treatment system. Stock solution sulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F13/02B01D29/03B01D29/60
CPCD01F13/02B01D29/03B01D29/606Y02P70/62
Inventor 张学刚李文峰路宽陈忠彭金磙李明徐成斌刘云国王超
Owner 赛得利(江苏)纤维有限公司
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