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A kind of recovery process of carbon disulfide in viscose fiber production

A technology of carbon disulfide and viscose fiber, which is applied in the direction of carbon disulfide, carbon sulfur compounds, chemical instruments and methods, etc., and can solve the problems of low mass and heat transfer capacity, high operating cost and investment cost, and irritation , to achieve high degree of automation, low investment and operating costs, and easy operation

Active Publication Date: 2015-11-18
YIBIN HIEST FIBER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Carbon disulfide is a colorless liquid at room temperature, volatile, extremely flammable and irritating. The existence of carbon disulfide not only pollutes the environment, but also brings serious safety hazards to production. Therefore, carbon disulfide waste gas must be treated.
This patent uses activated carbon to adsorb carbon disulfide. The operating cost and investment cost of activated carbon adsorption are relatively high, the mass transfer and heat transfer between gas and solid is lower than that between gas and liquid, the absorption speed is slow, and the absorption effect is not as good as solvent adsorption.

Method used

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  • A kind of recovery process of carbon disulfide in viscose fiber production
  • A kind of recovery process of carbon disulfide in viscose fiber production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A process for recovering carbon disulfide in viscose fiber production, wherein the carbon disulfide waste gas produced in viscose fiber production is sprayed with alkali to remove hydrogen sulfide in the waste gas, and then the carbon disulfide is recovered through the following process steps:

[0044] A absorbs carbon disulfide

[0045] Use white oil as an absorbent to absorb carbon disulfide in the exhaust gas, and cool down the saturated carbon disulfide-rich liquid to 15°C;

[0046] B analysis

[0047] The saturated carbon disulfide-rich liquid enters the desorption tower through the pump, and is heated to 150°C after passing through the liquid distributor. It is easy to boil under heating and is separated from the absorbent to form carbon disulfide gas and lean liquid;

[0048] C recycling

[0049] The carbon disulfide gas is condensed and gas-liquid separated to recover the condensed carbon disulfide.

Embodiment 2

[0051] A process for recovering carbon disulfide in viscose fiber production, wherein the carbon disulfide waste gas produced in viscose fiber production is sprayed with alkali to remove hydrogen sulfide in the waste gas, and then the carbon disulfide is recovered through the following process steps:

[0052] A absorbs carbon disulfide

[0053] Use white oil as an absorbent to absorb carbon disulfide in the exhaust gas, and cool down the saturated carbon disulfide-rich liquid to 35°C;

[0054] B analysis

[0055] The saturated carbon disulfide rich liquid enters the desorption tower through the pump, and is heated to 170°C after passing through the liquid distributor, boils under heating, and is separated from the absorbent to form carbon disulfide gas and lean liquid;

[0056] C recycling

[0057] The carbon disulfide gas is condensed and gas-liquid separated to recover the condensed carbon disulfide.

Embodiment 3

[0059] A process for recovering carbon disulfide in viscose fiber production, wherein the carbon disulfide waste gas produced in viscose fiber production is sprayed with alkali to remove hydrogen sulfide in the waste gas, and then the carbon disulfide is recovered through the following process steps:

[0060] A absorbs carbon disulfide

[0061] Use white oil as an absorbent to absorb carbon disulfide in the exhaust gas, and cool down the saturated carbon disulfide-rich liquid to 30°C;

[0062] B analysis

[0063] The saturated carbon disulfide rich solution enters the desorption tower through the pump, and after passing through the liquid distributor, the carbon disulfide rich solution first slowly rises to 140°C at a speed of 12°C / min, and then rises to 160°C within 1 minute, and keeps the temperature for 30 minutes. Boiling under heating, separating to form carbon disulfide gas and lean liquid;

[0064] C recycling

[0065] The carbon disulfide gas is condensed and gas-li...

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Abstract

Relating to the field of exhaust gas recovery in the viscose fiber industry, the invention provides a technology for recovery of carbon disulfide in viscose fiber production. The technology is characterized in that: the hydrogen sulfide in carbon disulfide exhaust gas produced in viscose fiber production is removed by alkali spraying, then carbon disulfide is recovered through the steps of: A) taking white oil as an absorbent to absorb carbon disulfide in the exhaust gas, cooling an absorption saturated carbon disulfide-rich solution to 15-35DEG C; B) pumping the absorption saturated carbon disulfide-rich solution into a desorption tower, passing the solution through a liquid distributor, then heating the solution to 150DEG C-170DEG C, boiling the solution so as to separate the carbon disulfide gas and a barren solution; and C) subjecting the carbon disulfide gas to condensation and gas-liquid separation, and recovering the condensed carbon disulfide. The recovery technology involved in the invention has the advantages of high absorption rate, and low investment and operation cost.

Description

technical field [0001] The invention relates to the field of waste gas recovery in the viscose fiber industry, in particular to a recovery process for carbon disulfide in viscose fiber production. Background technique [0002] The production of viscose fiber generally adopts alkaline yellowing glue making and acid coagulation forming process. Therefore, the waste gas generated in the production process of viscose fiber contains a large amount of H 2 S and CS 2 . CS in the exhaust 2 It mainly comes from the yellowing, coagulation forming and plasticizing stretching process of viscose fiber, and is produced by the by-product of the yellowing reaction of alkali cellulose. The main reaction formula is: [0003] Na 2 CS 3 +H 2 SO 4 →Na 2 S+CS 2 ↑+H 2 S↑ [0004] C 6 h 7 o 2 (OH) 3~X (OCSSH) X +H + →C 6 h 10 o 5 +XCS 2 ↑ [0005] Carbon disulfide is a colorless liquid at room temperature, volatile, extremely flammable and irritating. The existence of carbon d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/48B01D5/00C01B31/26C01B32/72
Inventor 邓传东易家祥王兵夏崇胜赵红霞
Owner YIBIN HIEST FIBER
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