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Method for enabling smoke detection and alarm system to be used in phosphine environment

An alarm system, phosphine technology, applied in the direction of alarms, fire alarms, scattering characteristics measurement, etc., can solve the problem of unusable fire detection alarms, etc., and achieve the effect of simple structure and convenient operation

Inactive Publication Date: 2012-04-18
秦科雁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to seek a kind of suitable method, can overcome above-mentioned shortcoming, make the metal parts of smoke detection and alarm system not be corroded in the environment containing phosphine gas, can carry out smoke detection and alarm normally for a long time, with Fundamentally solve the problem that the fire detection and alarm cannot be used in the environment containing phosphine gas

Method used

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  • Method for enabling smoke detection and alarm system to be used in phosphine environment
  • Method for enabling smoke detection and alarm system to be used in phosphine environment

Examples

Experimental program
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Effect test

Embodiment 1

[0050] When carrying out aluminum phosphide fumigation to kill insects, with (1) Pd2+ and Fe3+ ion concentration is the Pd(II)-Fe(III) liquid-phase catalytic oxidant of 0.114mol / L; (2) calcium hypochlorite efficient bleaching powder saturated solution 1600ml are added together into a negative pressure reaction separator with a height of 460mm and a diameter of 168mm. The operation is as follows:

[0051] (1) Close the sealing cover tightly, subject to no air leakage;

[0052] (2) Put a pot of smoldering sawdust in the warehouse where aluminum phosphide is fumigated to kill insects;

[0053] (3) Connect the UPCV sampling tube of the air sampling type high-sensitivity smoke detection and alarm system to the warehouse and the negative pressure reaction separator that are being fumigated and killed by aluminum phosphide, and pay attention to close the intake valve of the intake pipe first ;

[0054] (4) Connect the negative pressure reaction separator and the air sampling type ...

Embodiment 2

[0064] After aluminum phosphide fumigating insecticide is finished, with (1) Pd2+ and Fe3+ ion concentration is the Pd(II)-Fe(III) liquid-phase catalytic oxidant of 0.114mol / L; (2) calcium hypochlorite efficient bleaching powder saturated solution 1600ml Add together to a negative pressure reaction separator with a height of 460mm and a diameter of 168mm. The operation is as follows:

[0065] (1) Close the sealing cover tightly, subject to no air leakage;

[0066] (2) Put a pot of smoldering sawdust in the warehouse where aluminum phosphide is fumigated to kill insects;

[0067] (3) Connect the UPCV sampling tube of the air sampling type high-sensitivity smoke detection and alarm system to the warehouse and the negative pressure reaction separator that are being fumigated and killed by aluminum phosphide, and pay attention to close the intake valve of the intake pipe first ;

[0068] (4) Connect the negative pressure reaction separator and the air sampling type high-sensiti...

Embodiment 3

[0078] When aluminum phosphide fumigation is in progress, 1300ml of calcium hypochlorite high-efficiency bleaching powder saturated solution is added to a negative pressure reaction separator with a height of 460mm and a diameter of 168mm. The operation is as follows:

[0079] (1) Close the sealing cover tightly, subject to no air leakage;

[0080] (2) Put a pot of smoldering sawdust in the warehouse where aluminum phosphide is fumigated to kill insects;

[0081] (3) Connect the UPCV sampling tube of the air sampling type high-sensitivity smoke detection and alarm system to the warehouse and the negative pressure reaction separator that are being fumigated and killed by aluminum phosphide, and pay attention to close the intake valve of the intake pipe first ;

[0082] (4) Connect the negative pressure reaction separator and the air sampling type high-sensitivity smoke detection and alarm system with the UPCV sampling tube;

[0083] (5) Open the intake valve of the intake ai...

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Abstract

The invention discloses a method for enabling a smoke detection and alarm system to be used in a phosphine environment, namely, a method for thoroughly eliminating the possibility that PH3 corrodes metal parts of a smoke detection and alarm system by adopting four protective screens. The method comprises the following steps: (1) adopting an air-sampling high-sensitivity smoke detection and alarm system which can be arranged away from a phosphine scene; (2) feeding only 5 percent of air samples into a detection cavity, and directly discharging the residual 95 percent of air samples; (3) coating the metal parts of the smoke detection and alarm system with epoxy resins; and (4) carrying out catalytic oxidation absorption and separation on the metal parts in a negative-pressure reaction separator by using Pd (II)-Fe (III) liquid-phase catalytic oxidizing agent or efficient calcium-hypochlorite bleach solution. The method provided by the invention has the advantages of high reliability, simple process and equipment, cheap and easily-obtained catalytic agent and absorbent, high absorption efficiency and capability of improving the smoke detection performance, and is convenient to operate, therefore, the method can be widely applied to fire detection alarms in a strong corrosive phosphine environment.

Description

technical field [0001] The invention relates to a method for enabling a smoke detection and alarm system to operate normally for a long time in an environment containing phosphine gas which has a strong corrosion effect on metal objects such as copper. In particular, it relates to a solution that phosphine gas produced by aluminum phosphide fumigation and insecticide has a strong corrosion effect on metal objects such as circuit boards and electronic components of fire detection and alarm equipment. [0002] At present, aluminum phosphide tablets are used to kill insects in tobacco leaf storage warehouses, medicinal material storage warehouses and grain storage warehouses, which have been widely used because of their high insecticidal efficiency and economical convenience. When aluminum phosphide encounters water in the air, it will decompose and produce phosphine gas, which is highly toxic and has a strong corrosion effect on metal objects. Each gram of aluminum phosphide tab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B17/107G01N21/53
Inventor 秦科雁
Owner 秦科雁
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