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Safety protection and control system for closed space in acidic etchant gas environment

A technology for corrosive gas and safety protection, applied in heating and ventilation control systems, heating and ventilation safety systems, space heating and ventilation, etc., to achieve long storage life, mildew-proof on-site replacement, and good anti-aging performance

Active Publication Date: 2013-11-20
ENG DESIGN & RES INST OF GENERAL ARMAMENTS DEPT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] What the present invention aims to solve is the problem of safety protection of personnel, instruments and equipment in a confined space in an acidic corrosive gas environment

Method used

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  • Safety protection and control system for closed space in acidic etchant gas environment
  • Safety protection and control system for closed space in acidic etchant gas environment
  • Safety protection and control system for closed space in acidic etchant gas environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1 Air supply mode for filtering acidic corrosive gas

[0051] The confined space 13 is in an environment of acidic corrosive gas, and when overpressure ventilation is required, an instruction is issued from the control panel 19 or the touch screen 20 of the control center 12, and the ventilation mode is turned on by the control box 10 through the host computer 11. At this time, the content in the environment The air of the acidic corrosive gas enters from the fan 1, and enters the acidic corrosive gas filter system 3 through the air intake electric three-way valve 2, where it is purified by adsorption and filtration of the cylindrical adsorption filter 18, and the purified air passes through the air supply electric three-way The valve 4 enters the air conditioner indoor unit 6, where it is regulated by the cooling / heat supplied by the outdoor unit 5, and enters the enclosed space 13 after reaching the set temperature and humidity; in the enclosed space 13, the ov...

Embodiment 2

[0053] Embodiment 2 clean air supply mode

[0054] Cleaning and ventilation means that when the environment of the confined space 13 has neither acidic corrosive gas nor other pollutants, and overpressure ventilation is required, commands are issued from the hand panel 19 or touch screen 20 of the control center 12, and the control box 10 is controlled by the host computer 11. When this ventilation mode is turned on, the air in the environment enters from the fan 1, passes through the air-intake electric three-way valve 2, passes through the air-supply electric three-way valve 4, and enters the air-conditioning indoor unit 6 without passing through the acid corrosion gas filter system 3. , where the cold / heat supplied by the outdoor unit 5 is regulated, and enters the enclosed space 13 after reaching the set temperature and humidity; in the enclosed space 13, the overpressure signal is sent by the overpressure sensor 9 through the control box 10 and the host computer 11 After ...

Embodiment 3

[0056] Embodiment 3 isolates self-oxygenation mode

[0057] Isolation and ventilation is a kind of confined space protection work in the closed space 13 when the filter corrosion gas ventilation and / or clean ventilation are ineffective; Box 10 turns on this kind of ventilation mode, and the air intake three-way valve 2, the air supply three-way valve 4, the air discharge valve 7 and the air intake fan are all in the closed state, and the airtight space neither enters nor exhausts air; at this time , the wind in the closed space 13 can only enter the air-conditioning indoor unit 6, where the cooling / heat supplied by the outdoor unit 5 is regulated, and enters the closed space 13 after reaching the set temperature and humidity.

[0058] When performing isolation and ventilation, the self-oxygenation system 21 in the confined space 13 needs to be turned on so that the confined space 13 can form an overpressure. The maintenance time in the acidic corrosive gas environment should n...

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Abstract

The invention discloses a safety protection and control system for a closed space in an acidic etchant gas environment. The system integrates acidic etchant gas purification, positive pressure protection, alarming and oxygen self-supply, comprises five main parts, namely an acidic etchant air filtering system, an air-conditioning system, a control center, a main-control box and an oxygen self-supply system, and is applicable to safety protection for personnel and equipment in a closed space in the environment of any of acidic etchant gases of sulfur dioxide, hydrogen chloride, nitrogen oxide, hydrogen sulfide, chlorine gas, sulfuric acid, hydrochloric acid, nitric acid mist. As for an acidic etchant gas with the initial concentration of 500-2,000 ppm, the effective protection time is 30 minutes at least and 180 minutes at most; even when the acidic etchant air filtering system is in a complete failure, the closed space can keep an excess pressure for 30 minutes through the oxygen self-supply system, and be evacuated to a safety zone on the condition that the closed space remains in operation.

Description

technical field [0001] The present invention relates to the field of emergency rescue and protection against leakage of hazardous chemicals, in particular to a set of positive pressure protection, air purification and self-oxygen supply integrated to protect the safety of personnel and equipment in a confined space in an acidic corrosive gas environment. system. Background technique [0002] Among the sudden leakage accidents of dangerous chemicals, the leakage accidents of acidic dangerous chemicals such as sulfuric acid, hydrochloric acid, nitric acid, chlorine gas, hydrogen sulfide, etc. accounted for nearly one third of the total. During the disposal of leakage accidents, on-site monitoring and emergency response Command is especially important. At the present stage, the monitoring and commanding of the accident site is mainly realized by wearing personal protective equipment, so the protective effect is very limited and the duration is short; while the confined space i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/02
Inventor 张统王守中董春宏徐勇方小军侯瑞琴
Owner ENG DESIGN & RES INST OF GENERAL ARMAMENTS DEPT
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