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Residual heat utilization method and apparatus in AC sponging agent drying system

A drying system and foaming agent technology, applied in heating devices, chemical instruments and methods, using non-combustion exothermic chemical reactions to generate heat, etc., can solve energy waste, waste heat utilization in the drying section, waste heat waste, etc. problems, to achieve the effect of reducing waste heat loss, obvious energy saving effect, and reduced steam consumption

Inactive Publication Date: 2008-12-17
JIANGXI SELON INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the waste heat in the drying section of the AC foaming agent is wasted, and the high-temperature condensed water is directly discharged by the drying system, resulting in a great waste of energy
[0005] In April 2002, in the fourth issue of China Chlor-Alkali Journal, Li Zongyao published "A Brief Discussion on the Process Improvement of AC Foaming Agent", which mentioned that the process of drying section of AC foaming agent has been improved, the purpose of which is to improve the operating environment and eliminate The thermal decomposition loss of AC does not mention the waste heat utilization in the drying section

Method used

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  • Residual heat utilization method and apparatus in AC sponging agent drying system
  • Residual heat utilization method and apparatus in AC sponging agent drying system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The steam sent from the heating pipeline, the pressure of the steam is 0.8MPa, and the temperature is 150°C, is transported to the air heater. After the steam heats the air in the air heater, the hot air enters the AC for foaming The feeding box of the agent, so as to dry the AC blowing agent. The steam turns into secondary steam after exothermic process in the air heater, and the secondary steam contains a large amount of uncondensed steam and hot water, and then the secondary steam enters the pressure regulating device to adjust the pressure of the steam, usually Adjust the pressure of the steam to 0.6MPa and the temperature to 120°C, then transport the steam with adjusted pressure to the condensation kettle of the condensation section of the AC foaming agent for heating to provide heat for the condensation reaction, and the temperature in the condensation reactor is 105 The temperature of the condensed water is about 95°C, and the condensed water generated after the ...

Embodiment 2

[0028] The steam sent from the heating pipeline, the pressure of the steam is 0.8MPa, and the temperature is 160°C, is sent to the air heater. After the steam heats the air in the air heater, the hot air enters the AC foaming agent The feeding box, so as to dry the AC blowing agent. The steam turns into secondary steam after exothermic process in the air heater, and the secondary steam contains a large amount of uncondensed steam and hot water, and then the secondary steam enters the pressure regulating device to adjust the pressure of the steam, usually Adjust the pressure of the steam to 0.6MPa and the temperature to 130°C, then transport the steam with the adjusted pressure to the condensation kettle in the condensation section of the AC foaming agent for heating to provide heat for the condensation reaction, and the temperature of the reactants in the condensation reactor The temperature of the condensed water is 106°C; the condensed water generated after the steam passes ...

Embodiment 3

[0030] The steam sent from the heating pipeline, the pressure of the steam is 0.8MPa, and the temperature is 170°C, is transported to the air heater. After the steam heats the air in the air heater, the hot air enters the AC for foaming The feeding box of the agent, so as to dry the AC blowing agent. The steam turns into secondary steam after exothermic process in the air heater, and the secondary steam contains a large amount of uncondensed steam and hot water, and then the secondary steam enters the pressure regulating device to adjust the pressure of the steam, usually Adjust the pressure of the steam to 0.6MPa and the temperature to 140°C, then transport the steam with the adjusted pressure to the condensation kettle of the condensation section of the AC foaming agent for heating to provide heat for the condensation reaction, and the temperature of the reactants in the condensation reactor The temperature of the condensed water is 104°C; the condensed water generated after...

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Abstract

The invention provides an afterheat utilizing method and device in a drying system of an AC foaming agent. The method includes: the steam from a heat supply pipeline is fed into an air heater to carry out heating on the steam for becoming secondary steam; then the secondary steam enters a pressure adjusting device; finally the secondary steam after pressure adjustment enters the condensation section of the AC foaming agent to carry out heating on a reactant in a condensation reactor. The afterheat utilizing system of the invention can be used for achieving the goal of saving energies, lead the heat of the steam to be fully utilized, reduce the afterheat loss and decrease the steam consumption.

Description

technical field [0001] The present invention relates to the synthesis system of AC blowing agent, specifically, the present invention refers to the waste heat utilization method and device in the drying system in the preparation process of AC blowing agent. Background technique [0002] AC foaming agent is widely used in plastics, rubber and leather industries. All kinds of foam and foam plastic products produced by it are odorless, non-discoloring and non-polluting. The current process of producing AC foaming agent is: hypochlorine section, hydrazine hydrate section, freezing desalination section, condensation section, oxidation section, and drying section. In the hypochlorite section, the diluted caustic soda solution reacts with chlorine gas to generate sodium hypochlorite. In the hydrazine hydrate section, the configured urea solution and sodium hypochlorite solution are first passed through the mixer and then through the vertical pipeline reactor to generate hydrazine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/00F24J1/00C08K5/24C09K23/00F24V30/00
Inventor 汪国清王寿发邢建华黄克生李明生刘朔
Owner JIANGXI SELON INDAL