The production purpose of catalytic combustion equipment is for environmental protection and the treatment of industrial waste gas pollution. In industrial production, a large amount of exhaust gases containing benzene, alcohols, ketones, and other pollutants are emitted. Harm the health of workers and pollute the environment. Catalytic combustion equipment, as a means of controlling exhaust gas pollution, has achieved significant results in China. However, there are still some potential uncertainties and accident hazards in the design, processing, and application of catalytic combustion devices, which can lead to fire and explosion in severe cases. Therefore, it is necessary to establish unified standards or design specifications for concentration control of catalytic combustion treatment waste gas. In addition to the above factors, from a technical perspective, the following non factors are also worth noting:

一、气体的爆炸下限与温度有关。通常，温度愈高，反应速度愈快，爆炸范围愈大。当进入催化燃烧装置的废气浓度过大时，催化燃烧装置的温度将会升高，加之自前国产催化燃烧装置均未设置废气浓度检测和控制设备，而温度升高后的废气的爆炸下限值将比手册给出的值要小，再加上装置中废气成分混合的不均匀性，在局部区域可能超过高温条件下废气的真实爆炸下限，则有爆炸的危险。

1、 The lower explosive limit of a gas is related to temperature. Usually, the higher the temperature, the faster the reaction speed, and the larger the explosion range. When the concentration of exhaust gas entering the catalytic combustion device is too high, the temperature of the catalytic combustion device will increase. In addition, since the previous domestic catalytic combustion devices have not been equipped with exhaust gas concentration detection and control equipment, the lower explosion limit of the exhaust gas after temperature increase will be smaller than the value given in the manual. In addition, the uneven mixing of exhaust gas components in the device may exceed the true explosion limit of the exhaust gas under high temperature conditions in local areas, There is a risk of explosion.

二、一般来讲，大多数废气中的成份在同样爆炸下限浓度下，所含的燃烧热值可视为相同值，每1%的爆炸下限值约含热值1868千焦/牛·米勺如果燃烧，即热值全部用于使废气本身升温，则1%的爆炸下限值的废气燃烧可使废气升温15.3℃；当废气浓度达到25%的爆炸下限值时，可使废气本身温度升高。

2、 Generally speaking, most components in exhaust gas can be considered to have the same combustion heat value at the same lower explosive limit concentration. For every 1% lower explosive limit, the combustion heat value is approximately 1868 kJ/N · m spoon. If combustion occurs, that is, all the heat value is used to raise the temperature of the exhaust gas itself, then the combustion of 1% lower explosive limit exhaust gas can raise the temperature of the exhaust gas by 15.3 ℃; When the concentration of exhaust gas reaches the lower explosive limit of 25%, it can cause the temperature of the exhaust gas itself to increase.

在使用催化燃烧设备时要注意问题。按照规定进行操作，以免发生意外。

Pay attention to issues when using catalytic combustion equipment. Operate according to regulations to avoid accidents.

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