1、瓦斯发电机组尾气的余热利用简介?对于瓦斯发电机组，瓦斯产生的能量只有30%—35%被转化为电能，约有30%—35%随高温尾气排出，约20%—25%被发动机自身冷却系统带走，约10%以机身散热和阻力等其他损耗。瓦斯发电机组余热利用就是通过专用设备将机组排出的高温尾气和冷却系统带走的热量回收，再输送到需要热源的车间或居民小区

　　1. Introduction to the utilization of waste heat from exhaust gas of gas generator sets? For gas generator sets, only 30% -35% of the energy generated by gas is converted into electrical energy, about 30% -35% is discharged with high-temperature exhaust gas, about 20% -25% is taken away by the engine's own cooling system, and about 10% is used for other losses such as body heat dissipation and resistance. The utilization of waste heat from gas generator sets refers to the recovery of high-temperature exhaust gas and heat carried away by the cooling system through specialized equipment, and then transported to workshops or residential areas that require heat sources

　　。例如，国内广泛使用的500KW低浓度瓦斯发电机组，其产生的高温尾气热量经热管空预器回收后，可向企业车间供热风，或在冬季向煤矿风井巷道供热风防止冻井；如果向办公室、居民小区或浴室供热，可加装热管换热器（热管省煤器），每台换热器可产生90℃以上的热水近4吨/小时，解决4000m2以上建筑面积采暖或中型浴池洗浴。

　　. For example, the widely used 500KW low concentration gas generator set in China can provide hot air to enterprise workshops or supply hot air to coal mine ventilation shafts in winter to prevent freezing after the high-temperature exhaust heat generated is recovered by the heat pipe air preheater; If heating is provided to offices, residential areas, or bathrooms, heat pipe heat exchangers (heat pipe economizers) can be installed. Each heat exchanger can generate nearly 4 tons/hour of hot water above 90 ℃, solving the heating needs of buildings with an area of over 4000m2 or medium-sized bathhouses.

　　瓦斯发电机组产生的尾气只要成分是CO2，温度在550℃左右，通常情况下，每台机组（500KW）产生的烟气流量在2130Nm3/h以上。随着瓦斯资源的深度开发，充分利用能源，合理利用瓦斯发电机组尾气余热是大势所趋。?1.1、瓦斯发电机组余热回收的工作原理?在瓦斯发电机组排气系统安装热管余热回收装置，即热管空预器（热风利用）或热管换热器（热水利用）或热管蒸发器（低压饱和蒸汽利用），通过热动力循环设备（即大功率风机或热水利用管道循环泵或蒸汽管道）将低温交换介质（空气或者软化水）送到余热回收装置，经加热的低温交换介质变成热源直接或者再次交换后输送给终端客户使用。

　　The exhaust gas generated by a gas generator set, as long as the component is CO2 and the temperature is around 550 ℃, usually produces a flue gas flow rate of 2130Nm3/h or more per unit (500KW). With the deep development of gas resources, it is the trend to fully utilize energy and make reasonable use of the waste heat from the exhaust gas of gas generators.? 1.1 Working principle of waste heat recovery for gas generator sets? Install a heat pipe waste heat recovery device in the exhaust system of a gas generator unit, namely a heat pipe air preheater (hot air utilization), heat pipe heat exchanger (hot water utilization), or heat pipe evaporator (low-pressure saturated steam utilization). The low-temperature exchange medium (air or softened water) is sent to the waste heat recovery device through a thermal power circulation device (i.e. high-power fan or hot water utilization pipeline circulation pump or steam pipeline), and the heated low-temperature exchange medium becomes a heat source and is directly or re exchanged before being transported to end customers for use.

　　1.2、瓦斯发电机组余热回收的主要用途?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：（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。

　　1.2. What are the main uses of waste heat recovery in gas generator sets? The methods of waste heat recovery vary depending on the heat source required by each enterprise, including air replacement waste heat, softened water replacement waste heat to produce hot water, and softened water replacement waste heat to produce steam. The main uses of waste heat recovery are as follows: (1) coal mine tunnel heating (air shaft heating air): In winter in the north, coal mine air shaft tunnels require hot air stoves to warm the shafts. The high-temperature exhaust gas generated by the low concentration gas generator unit is passed through a heat pipe air preheater, and the cold air is heated to obtain high-temperature hot air. The hot air is then sent to the air shaft through the flue and the heat pipe air preheater for further heat exchange, thereby reducing the heat output of the underground hot air stove and saving electricity.

　　（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。?（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。

　　(2) Drying, heating, and bathing heat sources:? Drying, heating, and bathing in enterprise production processes require heat sources year-round. Install a heat pipe heat exchanger (heat pipe economizer) at the outlet of the generator set flue, and send several low-temperature water to the heat pipe heat exchanger through a hot water circulation pump. The softened water after heat exchange is used as a heat source (above 90 ℃) for enterprise production, and the cooled softened water returns to the heat pipe heat exchanger, repeating the cycle.? (3) Waste heat refrigeration: Currently, lithium bromide absorption refrigeration is widely used. Use a heat pipe evaporator to absorb the heat recovered from the waste heat of a 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: By recovering the waste heat from the exhaust gas of multiple gas generator units, installing heat pipe evaporators, and generating saturated steam, the steam turbine units are then driven for secondary power generation. The condensed water after power generation can also be used for cooling or heating, bringing considerable economic benefits to the enterprise.

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