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A kind of cs2 recovery method of viscose staple fiber production

A recycling method and technology of viscose staple fiber, applied in the field of spinning, can solve the problems of consuming a large amount of cold water or frozen water, equipment investment and occupying a large area, and cannot be recycled, etc., to improve recovery rate, large investment, and reduce load. Effect

Inactive Publication Date: 2016-05-25
YIBIN GRACE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned patent directly sprays the exhaust gas with alkali, but this way recovers CS 2 The flaw that exists is that CS 2 The recovery rate is low, generally only about 40%; the steam heat and water vapor steamed from the plasticizing tank cannot be recycled; condensed CS 2 And water vapor needs to consume a lot of cold water or frozen water; equipment investment and land occupation are large, and maintenance is frequent

Method used

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  • A kind of cs2 recovery method of viscose staple fiber production
  • A kind of cs2 recovery method of viscose staple fiber production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of CS produced by viscose staple fiber 2 The recovery method, in the production process of staple fiber tow, when the tow passes through the plasticizing tank 1, the mixed steam generated by the plasticizing tank 1 passes through the air guide pipe 6, and the water in the mixed steam is condensed and separated through the pre-cooling step; CS on steam 2 The gas enters the atomizing condenser 3, and in the atomizing condenser 3, the pressurized water is sprayed out through the atomizing nozzle to realize spray condensation, thereby realizing the effect of heat absorption. When the temperature in the atomizing condenser 3 drops to CS 2 At the condensation point of the gas, CS 2 Gas condenses into CS 2 Liquid recovery.

[0035] The present invention overcomes traditional CS 2 In the recovery process, the recovery rate is low, the heat energy cannot be recovered, the operating cost is high, and the equipment needs to be cleaned and maintained regularly. This app...

Embodiment 2

[0037] A kind of CS produced by viscose staple fiber 2 The recovery method, in the production process of staple fiber tow, when the tow passes through the plasticizing tank 1, the mixed steam generated by the plasticizing tank 1 passes through the air guide pipe 6, and the water in the mixed steam is condensed and separated through the pre-cooling step; CS on steam 2 The gas enters the atomizing condenser 3, and in the atomizing condenser 3, the pressurized water is sprayed out through the atomizing nozzle to realize spray condensation, thereby realizing the effect of heat absorption. When the temperature in the atomizing condenser 3 drops to CS 2 At the condensation point of the gas, CS 2 Gas condenses into CS 2 Liquid recovery.

[0038] The atomized water droplets sprayed by the atomizing nozzle have a diameter of 8-12 μm. Input saturated steam in plasticizing tank 1, the pressure of described saturated steam is 3-5Kg, and temperature is 140 ℃ -160°C, the saturated stea...

Embodiment 3

[0043] A kind of CS produced by viscose staple fiber 2 The recovery method, in the production process of staple fiber tow, when the tow passes through the plasticizing tank 1, the mixed steam generated by the plasticizing tank 1 passes through the air guide pipe 6, and the water in the mixed steam is condensed and separated through the pre-cooling step; CS on steam 2 The gas enters the atomizing condenser 3, and in the atomizing condenser 3, the pressurized water is sprayed out through the atomizing nozzle to realize spray condensation, thereby realizing the effect of heat absorption. When the temperature in the atomizing condenser 3 drops to CS 2 At the condensation point of the gas, CS 2 Gas condenses into CS 2 Liquid recovery.

[0044] The diameter of the atomized water droplets sprayed by the atomizing nozzle is 12 μm. Input saturated steam into the plasticizing tank 1, the pressure of the saturated steam is 3Kg, and the temperature is 160°C, the saturated steam and th...

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Abstract

The invention relates to the technical field of spinning, and in particular relates to a CS2 recovery method for viscose staple fiber production. Mixed steam produced in a plasticizing tank penetrates through a gas guiding tube and is subjected to pre-cooling, and water in the mixed steam is condensed and separated; CS2 gas in the mixed steam is introduced into an atomizing condenser; pressurizing water is sprayed out by virtue of an atomizing spray head in the atomizing condenser so as to realize atomizing condensation, and therefore, a heat absorption effect is realized; when the temperature in the atomizing condenser is reduced to a condensation point of the CS2 gas, the CS2 gas is condensed into CS2 liquid for being recovered; the condensation temperature of CS2 is reduced to a condensation point; the CS2 gas is condensed by virtue of atomizing water to realize atomizing water condensation nucleus. According to the method, the condensation speed of CS2 can be increased, CS2 can be rapidly condensed and recovered, the loss amount of the tail gas is reduced, and the CS2 recovery rate is increased.

Description

technical field [0001] The invention relates to the technical field of spinning, in particular to a CS produced by viscose staple fiber 2 Recycling method. Background technique [0002] CS during staple fiber production 2 The size of the recovery rate is directly related to the value increase and consumption reduction of the enterprise and the reduction of CS 2 Emissions reduce environmental pollution and improve the industry competitiveness of enterprises. CS of existing viscose staple fiber 2 The equipment included in the recovery system includes: plasticizing tank, condenser, cooling tower system, and CS2 recovery tank; the main process is as follows: CS2 gas evaporated from the plasticizing tank enters the condenser through a large conduit, and is cooled by two stages of the condenser. The condensed water and CS2 (liquid) flow to the CS2 recovery tank by itself, and the water overflows away, and the separated CS2 is stored in the recovery tank, and when it reaches a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D5/00C01B31/26
Inventor 张仁友贺敏刘小军汪学良蒋运乔
Owner YIBIN GRACE