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在我國(guó) ,由于歷史和認(rèn)識(shí)上的原因 ,我們?cè)谶x用各類(lèi)檢測(cè)儀時(shí)存在的問(wèn)題還比較多 ,具體體現(xiàn)在 :

In our country, because of the historical and cognitive reasons, there are many problems in the selection of various kinds of detection instruments, which are embodied in the following:

a. 對(duì)可燃?xì)怏w的檢測(cè)重于對(duì)有毒氣體的檢測(cè)。

The detection of combustible gases by A. is more than the detection of toxic gases.

b. 對(duì)可能引起急性中毒氣體的檢測(cè)重于對(duì)可能引起慢性中毒的氣體的檢測(cè)。

The detection of the possible causes of acute poisoning by B. is more than the detection of gases that may cause chronic poisoning.

由于眾多可燃?xì)怏w泄漏所引起的爆炸事故的血的教訓(xùn) ,使人們對(duì)于可燃?xì)怏w檢測(cè)十分重視 ,可以講 ,任何一個(gè)煉油廠、化工廠 ,大多數(shù)的危險(xiǎn)場(chǎng)合選用的氣體檢測(cè)儀都是可燃?xì)怏w檢測(cè)儀。但僅配備燃?xì)怏w檢測(cè)儀對(duì)于真正保護(hù)工人的安全和健康還是遠(yuǎn)遠(yuǎn)不夠的。不可否認(rèn)的是 ,大多數(shù)的揮發(fā)性危險(xiǎn)氣體都是易燃易爆氣體 ,但是 ,催化燃燒式的易可燃?xì)怏w檢測(cè)儀(LEL) 并不是對(duì)所有的可燃?xì)怏w的檢測(cè)都是比較佳選擇 ,因?yàn)樗鼈兛梢詸z測(cè)出的除甲烷以外的可燃?xì)怏w的下限濃度要遠(yuǎn)遠(yuǎn)高于它們的允許濃度。

Because of the lessons learned from the explosion accidents caused by many flammable gas leaks, people pay much attention to the detection of flammable gases. It can be said that any gas detector used in most oil refineries and chemical plants is a combustible gas detector. But the only gas detector is not enough to protect the safety and health of the workers.  It is undeniable that the most volatile hazardous gas is flammable and explosive gas, but the easy combustible gas catalytic combustion detector (LEL) and not all of the combustible gas detection is the best choice, because they can detect the methane removal outside the combustible gas concentration is much higher than the lower limit allow their concentration.

比如 :對(duì)于苯、氨氣等危險(xiǎn)有毒氣體 ,單純使用易燃易爆氣體檢測(cè)儀就是一個(gè)十分危險(xiǎn)的做法。比如 ,苯的爆炸下限是 1. 2 % ,它在可燃?xì)怏w檢測(cè)儀上的校正系數(shù)是 2. 51 ,也就是說(shuō) ,苯在一個(gè)用甲烷標(biāo)定的可燃?xì)怏w檢測(cè)儀上的顯示的濃度只是其實(shí)際濃度的40 % ! ! 這樣 ,用可燃?xì)怏w檢測(cè)儀可以檢測(cè)到的苯的比較低警報(bào)濃度是 10 %LEL ,這個(gè)濃度同苯的允許濃度相比要高近600倍 ! !。同樣 ,用可燃?xì)怏w檢測(cè)儀檢測(cè)氨氣的警報(bào)濃度也要比其允許濃度高大約1000倍。因此根據(jù)所檢測(cè)氣體的不同 ,選擇特定有毒氣體檢測(cè)儀要比單純選擇可燃?xì)怏w檢測(cè)儀更加安全可靠。

For example, for dangerous toxic gases such as benzene and ammonia, it is a very dangerous practice to simply use flammable and explosive gas detector. For example, the explosion limit of benzene is 1.2%, the correction coefficient in the combustible gas detector on the 2.51, that is to say, the concentration of benzene in a methane calibration combustible gas detection instrument display only the actual concentration of 40%!! so, the lowest concentration of combustible gas detector alarm can be detected the benzene is 10%LEL, the concentration of benzene with the allowable concentration compared to high of nearly 600 times!!. Similarly, the alarm concentration of ammonia gas detected by a combustible gas detector is about 1000 times higher than its permitted concentration.  Therefore, according to the difference of the detected gas, the selection of specific toxic gas detector is more safe and reliable than the simple choice of the combustible gas detector.

另外 ,目前我們對(duì)于可以引起急性中毒的氣體 ,比如硫化氫、氰氫酸等的檢測(cè)較為重視 ,但對(duì)于可以引起慢性中毒的氣體 ,比如芳香烴、醇類(lèi)等的檢測(cè)重視不夠 ,其實(shí)后者對(duì)于工人健康和安全的危害絲毫不遜于可以引起急性中毒的氣體 ! 這除了認(rèn)識(shí)上的原因以外 ,以前的市場(chǎng)上缺乏可以檢測(cè)較低濃度的氣體檢測(cè)儀也是一個(gè)重要的原因。 隨著科學(xué)技術(shù)水平的發(fā)展和人們健康認(rèn)識(shí)的提高 ,人們已經(jīng)不滿足于“高高興興上班來(lái) ,平平安安回家去”,而是追求著更高的生活質(zhì)量和生活條件。 人們不僅關(guān)心著今日的工作 ,更關(guān)心著明天——退休以后的生活。因此在工業(yè)衛(wèi)生和工業(yè)安全工作中要不斷地引入新觀念、新思路才能避免日后悲劇的發(fā)生。而且避免日后悲劇的發(fā)生 ,所有這些 ,都需要通過(guò)法規(guī)制定和人們素質(zhì)的提高得到不斷地改善和提高。

In addition, we are currently in the gas can cause acute poisoning, such as detection of hydrogen sulfide, hydrogen cyanide and other more attention, but the gas can cause chronic poisoning, such as detection of aromatic hydrocarbons, alcohols, attention is not enough, in fact, the latter for the gas workers' health and safety hazards in no way inferior to can cause acute poisoning in addition to this! Besides understanding the reasons, before the market on the lack of gas can detect low concentration detector is one of the important reasons. With the development of science and technology and the improvement of people's health awareness, people are no longer satisfied with "go to work happily," but pursue higher quality of life and living conditions. People are not only concerned about today's work, but also about tomorrow - life after retirement. So to continue to introduce new concepts, new ideas in order to avoid the tragedy in the days after the industrial hygiene and industrial safety work. And avoid the occurrence of days after the tragedy, all of these are required by laws and regulations and improve the quality of people has been constantly improving.