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内燃发电机组瓦斯输送工艺研究及发展历程

来源:http://zuiai9.com   发布于:2019-07-05

我国从80年代,就开端了对瓦斯发电技术的研讨,随着瓦斯发电技术的开展,燃气内燃机作为瓦斯发电的主要设备,其具有系统简单、运转灵敏、发电效率高、启动时间短、燃气供气压力低、对燃气浓度顺应范围宽的特性;这使得燃气内燃发电机组在瓦斯发电方面取得了越来越普遍的应用。由于燃气内燃机对瓦斯中的甲烷体积百分数、含水量、含尘量、粉尘粒度、进气压力等都有一定请求。电厂的气源均为直接从井下抽采,具有动摇性,所以必需对抽采的瓦斯停止净化处置,选择合理的保送系统,以满足燃气内燃机的需求,保证燃气内燃发电机组平安运转。

Since the 1980s, China began to discuss the gas power generation technology. With the development of gas power generation technology, gas internal combustion engine, as the main equipment of gas power generation, has the characteristics of simple system, sensitive operation, high power generation efficiency, short start-up time, low gas supply pressure and wide range of gas concentration compliance. Gas-fired internal combustion generating units have been more and more widely used in gas power generation. Gas internal combustion engine has certain requirements for methane volume percentage, water content, dust content, dust particle size, intake pressure and so on. The gas source of the power plant is extracted directly from the underground, which is shaky. Therefore, it is necessary to stop the purification and disposal of the extracted gas and select a reasonable delivery system to meet the needs of the gas-fired internal combustion engine and ensure the safe operation of the gas-fired internal combustion generating units.

2.瓦斯的保送工艺

2. Gas delivery technology

瓦斯经过瓦斯抽放站,用真空泵把井下瓦斯经过管道抽放出来送到瓦斯储气罐中。电厂建立一座瓦斯加压站,将瓦斯加压,并经过净化除湿后到达燃气内燃机入口燃气参数和质量的请求,供应燃气内燃机运用。

The gas passes through the gas drainage station and is pumped out through the pipeline by a vacuum pump to be sent to the gas storage tank. A gas pressurization station is set up in the power plant to pressurize the gas and reach the request of gas parameters and quality at the entrance of the gas internal combustion engine after purification and dehumidification, so as to supply the gas internal combustion engine for use.

瓦斯保送系统普通包括以下几个环节:对从井下抽采的瓦斯停止贮存、加压、脱水、过滤。因瓦斯具有易燃易爆的特性,还要在系统上设置相应的平安安装。

Gas delivery system generally includes the following links: stopping storage, pressurization, dehydration and filtration of gas extracted from underground mine. Because the gas is flammable and explosive, it should be installed safely in the system.

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依照瓦斯中的甲烷体积百分数,瓦斯保送系统可分为两种,甲烷体积百分数在25%及以上的应采用高浓度保送系统;甲烷体积百分数在6~25%之间的应采用低浓度保送系统。2。1高浓度瓦斯保送工艺

According to the volume percentage of methane in the gas, the gas delivery system can be divided into two kinds。 The high concentration delivery system should be used when the volume percentage of methane is 25% or more, and the low concentration delivery system should be used when the volume percentage of methane is between 6% and 25%。 2。1 High Concentration Gas Guarantee Technology

设在瓦斯抽放站的真空泵把井下的瓦斯经过管道抽放出来,首先送到瓦斯储气罐。

The vacuum pump located in the gas drainage station pumps out the underground gas through the pipeline and sends it to the gas storage tank first。

储气罐的进、出口管道上设有水封阀,可起到阻火作用。储气罐进口管路设有快速切断阀,当瓦斯中甲烷体积百分数低于25%时,关闭快速切断阀,翻开放空阀,以保证储气罐内甲烷的体积百分数。储气罐出口管路也设有快速切断阀,当瓦斯加压系统呈现毛病时,疾速切断与储气罐的联络。

A water seal valve is installed on the inlet and outlet pipelines of the gas storage tank, which can prevent fire。 When the volume percentage of methane in the gas is less than 25%, close the fast cut-off valve and turn over the empty valve to ensure the volume percentage of methane in the gas storage tank。 The outlet pipeline of the gas storage tank is also equipped with a quick shut-off valve。 When the gas pressure system is defective, the connection with the gas storage tank is cut off rapidly。

瓦斯进、出储气罐管道上设有旁路阀门,在储气罐毛病停运时,经过旁路供气。

The gas inlet and outlet pipelines of gas storage tanks are equipped with bypass valves。 When the gas storage tanks are out of service, the gas is supplied by bypass。

瓦斯经过管道保送到瓦斯加压风机。加压风机的入口总管设有脱水安装,以免瓦斯中带水影响保送和后续设备的运转。加压风机普通设两台,一用一备。加压风机出口设有过滤安装,以脱除粉尘等杂质,因过滤安装阻力较大,瓦斯所含粉尘较少,不影响加压风机的运转,所以普通不在加压风机进口设置过滤安装。加压风机进、出口均采用单母管。加压风机进口设有隔断阀,出口设有平安阀、隔断阀等,出口母管设有隔断阀、快速切断阀、阻火器、流量丈量安装,当燃气内燃发电机组或加压系统毛病时,快速切断阀能快速切断两者之间的联络。

The gas is guaranteed to the gas pressurized fan through the pipeline. The inlet main pipe of the pressurized fan is equipped with dehydration installation to avoid water in the gas affecting the operation of the delivery and follow-up equipment. Pressure fans are usually equipped with two sets, one with one set. The outlet of pressurized fan is equipped with filtering installation to remove impurities such as dust. Because of the greater resistance of filtering installation and the less dust contained in gas, it does not affect the operation of pressurized fan, so it is not usually installed at the inlet of pressurized fan. Single main pipe is used for inlet and outlet of pressurized fan. The inlet of pressurized fan is equipped with partition valve, the outlet is equipped with safety valve, partition valve and so on. The outlet main pipe is equipped with partition valve, fast shut-off valve, flame arrester and flow measurement installation. When the gas-fired internal combustion generating unit or pressure system is in trouble, the fast shut-off valve can quickly cut off the connection between the two.

瓦斯经过管道,保送到主厂房,接入每台燃气内燃发电机组,内燃机入口管道设有隔断阀、过滤器、阻火器、快速切断阀、流量调理阀。

The gas passes through the pipeline and is guaranteed to the main workshop. It is connected to each gas-fired internal combustion generator set. The inlet pipeline of the internal combustion engine is equipped with a partition valve, a filter, a flame arrester, a fast shut-off valve and a flow regulating valve.

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