低浓度瓦斯发电机组余热回收的方式根据各个企业所需要的热源不同有空气置换余热、软化水置换余热产生热水以及软化水置换余热产生蒸汽三种。余热回收后的主要用途有以下几种：

According to different heat sources required by various enterprises, waste heat recovery methods of low concentration gas generator units include air replacement waste heat, softened water replacement waste heat to generate hot water, and softened water replacement waste heat to generate steam. The main uses after waste heat recovery are as follows:

（1）煤矿巷道暖井（风井供热风）：在北方的冬季，煤矿风井巷道都需要热风炉暖井。把低浓度瓦斯发电机组产生的高温尾气经过热管空预器，将冷空气加热，可以得到高温热风通过烟道与风井处得热管空预器再次换热后的热空气送入风井，从而降低井下热风炉的热量输出，节约电能。

(1) Coal mine roadway warming (air shaft heating air): In winter in the north, coal mine air shaft roadway needs hot air stove warming. Heat the cold air by passing the high temperature tail gas produced by the low concentration gas generator unit through the heat pipe air preheater to get the high temperature hot air, which is sent to the air shaft through the flue and the heat pipe air preheater at the air shaft after heat exchange again, so as to reduce the heat output of the underground hot air furnace and save electric energy.

冬季工况下：阀门12、21开启，11、22关闭;同时，42、51开启，41、52关闭。矿井回风顺着回风风道1引至第三主风道03，并以一定的风速横向掠过换热器的蒸发段。液池中的工作液体受热蒸发，蒸汽在压力差作用下向上的流入热管较冷的冷凝段，放出汽化潜热;

Under winter working condition: valves 12 and 21 are opened and 11 and 22 are closed; At the same time, 42 and 51 are turned on and 41 and 52 are turned off. The mine return air is led to the third main air duct 03 along the return air duct 1 and sweeps across the evaporation section of the heat exchanger at a certain speed. The working liquid in the liquid pool is heated and evaporated, and the steam flows upward into the cooler condensing section of the heat pipe under the effect of pressure difference to release the latent heat of vaporization;

回风放出汽化潜热后温度降低，沿着第四主风道04进入排风风道4，终排至大气或作为其它方式的热源继续使用;室外的冷空气顺着新风管道5到达二主风道02，吸收汽化潜热，达到预热目的;加热后的空气温度升高到规定温度以上，沿着一主风道01进入进风风道2，终送入井筒内;冷凝后的工作液体在重力的作用下，回流到蒸发段的液池当中。

The temperature of the return air decreases after the vaporization latent heat is released, and it enters the exhaust air duct 4 along the fourth main air duct 04, and finally discharges to the atmosphere or continues to be used as a heat source in other ways; The outdoor cold air reaches the second main air duct 02 along the fresh air duct 5 to absorb the latent heat of vaporization and achieve the purpose of preheating; The heated air temperature rises above the specified temperature, enters the air inlet duct 2 along a main air duct 01, and finally enters the shaft; The condensed working liquid returns to the liquid pool in the evaporation section under the action of gravity.

夏季工况下：阀门11、22开启，12、21关闭;同时，41、52开启，42、51关闭。新风温度较高，蕴含大量低温热能;相反，回风侧温度较低，可吸收新风的热量以达到冷却新风的目的。工作原理与冬季相似，在此不再赘述。

Under summer working condition: valves 11 and 22 are opened, and valves 12 and 21 are closed; At the same time, 41 and 52 are turned on and 42 and 51 are turned off. The fresh air temperature is high and contains a lot of low temperature heat energy; On the contrary, the temperature of the return air side is low, which can absorb the heat of the fresh air to cool the fresh air. The working principle is similar to that in winter, so I will not repeat it here.

（2）烘干、采暖和洗浴用热源：企业生产工艺中的烘干、采暖和洗浴常年需要热源。在发电机组烟道出口加装一台热管换热器（热管省煤器），通过热水循环泵几个低温水送到热管换热器，经过热交换的软化水为热源（90℃以上）供给企业生产使用，冷却后的软化水在返回热管换热器，如此往复循环。

(2) Heat source for drying, heating and bathing: heat source is required for drying, heating and bathing in the production process of enterprises all the year round. A heat pipe heat exchanger (heat pipe economizer) is installed at the outlet of the flue of the generator set, and several low-temperature water is sent to the heat pipe heat exchanger through the hot water circulating pump. The softened water after heat exchange is used as the heat source (above 90 ℃) for the production of enterprises. The softened water after cooling is returned to the heat pipe heat exchanger, and so on.

（3）余热制冷：目前广泛采用溴化锂吸收式制冷。用热管蒸发器吸收低浓度瓦斯发电机组余热回收的热量。

(3) Waste heat refrigeration: At present, lithium bromide absorption refrigeration is widely used. Heat pipe evaporator is used to absorb heat recovered from waste heat of low concentration gas generator set.

（4）余热发电：通过多台瓦斯发电机组尾气的余热回收，安装热管蒸发器，产生的饱和蒸汽并往后拖动汽轮机组进行二次发电，发电后的冷凝水亦可制冷或者供暖，给企业带来可观的经济效益。

(4) Waste heat power generation: through the waste heat recovery of the tail gas of several gas generating units, heat pipe evaporators are installed to generate saturated steam and then drive the steam turbine unit for secondary power generation. The condensed water after power generation can also be used for refrigeration or heating, bringing considerable economic benefits to the enterprise.

低浓度瓦斯发电机组余热回收的主要用途就是这样了，我们从四个方面来讲解了这个问题，对您有什么帮助吗？欢迎来我们网站http://www.huannengpower.com咨询查看更多相关事项！

This is the main purpose of waste heat recovery of low concentration gas generator sets. We have explained this problem from four aspects. Is it helpful to you? Welcome to our website http://www.huannengpower.com Consult for more information!