Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for circularly reutilizing flashing secondary steam of acid bath system

A technology of secondary steam and flash evaporation, applied in flash evaporation, separation methods, chemical instruments and methods, etc., can solve the problems of high operating cost, unsuitable for production needs, not meeting environmental protection requirements, etc., and achieve the goal of reducing water consumption costs. Effect

Inactive Publication Date: 2019-01-11
唐山三友远达纤维有限公司
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the low-temperature secondary gas condensation in the flash evaporation system of the viscose staple fiber industry adopts a mixed condenser (MK) and an auxiliary condenser (HK) for cross-flow mixed condensation of circulating water. After the secondary steam is condensed, part of the hydrogen sulfide gas is dissolved in the circulating water. , and the circulating water is cooled by an open direct mixed cooling cooling tower. The hydrogen sulfide gas volatilizes during the cooling process, causing environmental pollution. It is also harmful to the human body and does not meet the national and local environmental protection requirements. From the perspective of corporate sustainable development and environmental protection related standards In the long run, such as increasingly strict, this problem also needs to be resolved urgently
Some manufacturers in the viscose industry try to use a new low-temperature secondary gas cooling process, which has high operating costs and is not suitable for actual production needs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for reusing flash secondary steam in an acid bath system, comprising the following steps: (1) the secondary steam is condensed in various partition wall heat exchangers, and the secondary steam in the flash evaporation chamber V11 of the acid bath system enters a The secondary steam in the evaporation chamber V10 enters the secondary heat exchanger, and the secondary steam in the evaporation chamber V9 enters the tertiary heat exchanger to exchange heat with the circulating water in the heat exchangers of each stage. The inlet temperature of the primary heat exchanger (the secondary steam of the evaporation chamber V11) is 36°C, the inlet temperature of the circulating water is 26°C, and the outlet water temperature is 31°C, and the secondary heat exchanger (the secondary steam of the evaporation chamber V10) The air temperature is 40°C, the circulating water inlet temperature is 31°C, the outlet water temperature is 36°C, the inlet temperature of the three-stag...

Embodiment 2

[0026]A method for reusing flash secondary steam in an acid bath system, comprising the following steps: (1) the secondary steam is condensed in various partition wall heat exchangers, and the secondary steam in the flash evaporation chamber V11 of the acid bath system enters a The secondary steam in the evaporation chamber V10 enters the secondary heat exchanger, and the secondary steam in the evaporation chamber V9 enters the tertiary heat exchanger to exchange heat with the circulating water in the heat exchangers of each stage. The inlet temperature of the primary heat exchanger (the secondary steam of the evaporation chamber V11) is 40°C, the inlet temperature of the circulating water is 30°C, and the outlet water temperature is 35°C, and the secondary heat exchanger (the secondary steam of the evaporation chamber V10) The air temperature is 45°C, the circulating water inlet temperature is 35°C, the outlet water temperature is 40°C, the inlet temperature of the three-stage...

Embodiment 3

[0028] A method for reusing flash secondary steam in an acid bath system, comprising the following steps: (1) the secondary steam is condensed in various partition wall heat exchangers, and the secondary steam in the flash evaporation chamber V11 of the acid bath system enters a The secondary steam in the evaporation chamber V10 enters the secondary heat exchanger, and the secondary steam in the evaporation chamber V9 enters the tertiary heat exchanger to exchange heat with the circulating water in the heat exchangers of each stage. The inlet temperature of the primary heat exchanger (the secondary steam of the evaporation chamber V11) is 38°C, the inlet temperature of the circulating water is 28°C, and the outlet water temperature is 33°C, and the secondary heat exchanger (the secondary steam of the evaporation chamber V10) The air temperature is 42°C, the circulating water inlet temperature is 33°C, the outlet water temperature is 38°C, the inlet temperature of the three-stag...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for circularly reutilizing flashing secondary steam of an acid bath system. The method comprises the following steps: (1) respectively introducing secondary steam ofa flashing evaporation chamber V11 of the acid bath system in a viscose production system into a first-stage heat exchanger, secondary steam of an evaporation chamber V10 into a second-stage heat exchanger and secondary steam of an evaporation chamber V9 into a third-stage heat exchanger, so as to respectively generate heat exchange with circulating water in each heat exchanger; and (2) condensingthe secondary steam through heat exchangers, collecting condensed water for reuse, vacuumizing non-condensable gas in the secondary steam for reuse, introducing heater circulating water in the heat exchangers into a closed cooling tower, and cooling for reuse. According to the method, the volatilization of the peculiar smell of an acid bath evaporation system in the viscose industry is fundamentally solved, and meanwhile, the closed cooling tower adopting a special structure and technical principle can meet the requirement on the temperature of cooling water in a workshop and can stable workfor a long time, so that the water and the energy can be saved, the emission can be reduced, and the service life of process device is prolonged.

Description

technical field [0001] The invention relates to a method for recycling and reusing secondary steam by flashing in an acid bath system, and belongs to the technical field of viscose acid bath production. Background technique [0002] At present, most of the low-temperature secondary gas condensation in the flash evaporation system of the viscose staple fiber industry adopts a mixed condenser (MK) and an auxiliary condenser (HK) for cross-flow mixed condensation of circulating water. After the secondary steam is condensed, part of the hydrogen sulfide gas is dissolved in the circulating water. , and the circulating water is cooled by an open direct mixed cooling cooling tower. The hydrogen sulfide gas volatilizes during the cooling process, causing environmental pollution. It is also harmful to the human body and does not meet the national and local environmental protection requirements. From the perspective of corporate sustainable development and environmental protection rela...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D3/06
CPCB01D3/007B01D3/065
Inventor 张浩红苏宝东李燕青庞艳丽胡军玲刘胜利王迎春朱明光李学苗李耀华孙有华张川郑东义赵增坡刘杰伍玉涛
Owner 唐山三友远达纤维有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products