Economic comparison between 1) bottled liquefied petroleum gas and light hydrocarbon gas: According to 48 yuan/bottle (13kg) of liquefied petroleum gas, liquefied petroleum gas 1kg is equivalent to light hydrocarbon gas 2. 1m3(5000Kcal/m3). If a family uses a bottle of liquefied petroleum gas a month, the cost is 48 yuan, and the cost of using light hydrocarbon gas in the same situation is about 35 yuan. (2) Economic comparison between pipeline liquefied petroleum gas and light hydrocarbon gas: According to the estimation of pipeline liquefied petroleum gas 10 yuan /m3, 1m3 pipeline liquefied petroleum gas is equivalent to 4.6m 3(5000 kcal/m3) light hydrocarbon gas, and the price of converting 1 m3 liquefied petroleum gas into 1 m3 light hydrocarbon gas is about 2. It can be seen that light hydrocarbon gas is more economical than liquefied petroleum gas. In addition, there are still several problems in the use of liquefied petroleum gas: first, the quality of domestic liquefied petroleum gas is poor, there are many residual liquids and insufficient loading; Secondly, changing bottles every time brings a lot of trouble to users, especially the residents with higher floors; Thirdly, although the pipeline liquefied petroleum gas avoids many inconveniences of bottled supply mode, the pressure of the gas supply station system is high and it is very dangerous to be arranged on the ground; Fourth, the containers for transporting, storing and vaporizing liquefied petroleum gas are all pressure vessels and must be inspected regularly according to regulations; Fifth, the requirements of fire prevention spacing are strict, and it is difficult to choose a site in residential areas.