Production method for civil mixed fuel gas consisting of light hydrocarbons mixed with air and coal
a technology of mixed fuel gas and light hydrocarbons, which is applied in the production of fuel gas, combustible gas purification/modification, fuels, etc., can solve problems such as severe toxicity, and achieve the effect of limiting heat value and high cos
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embodiment 1
[0037]In a certain city, it was assumed 100,000 household used manual pipeline coal gas at 5 R Standard. With expansion of the city proper and increasing of population, original manual coal gas couldn't meet demands of new increased coal gas users. The original gas supply was only enough to maintain supply for old users. It was estimated that coal gas user would increase to 200,000 in following 5 years. Therefore, light hydrocarbon mixed with air and coal gas was the best choice to increase heat value and enlarge gas supply capacity, which meant gas supply of 200,000 households in following five years could be satisfied and amount of gas supplied could be increased gradually based on pipeline expansion. Preparation methods were as follows: filtering liquid light hydrocarbon with a 200-mesh strainer and then pressing to pressure of 1.2 kg / cm2; heating and gasifying liquid light hydrocarbon in a heating gasifier to make it under pressure of or over 0.6 kg / cm2; mixing light hydrocarbon...
embodiment 2
[0050]In a certain city, water gas was used as main gas source for civil gas supply. In 1980s, three water gas generators at diameter of 2.26 meter were installed, two of which was for gas generation and the other one was for standby purpose. Daily water gas generation capacity is 60,000 m3 with heat value of 2800 Kcal / nm3. At that moment, the State didn't require heat value of coal gas reaching a high standard but maintaining gas supply for over 20,000 households in the city. However, with deepening of reform and opening up and development of local economy, coal gas users increased to 50,000 after urbanization and city expansion. It is estimated that there're over 80,000 gas users in city proper by 2008.
[0051]If municipal planning on fuel gas engineering is refined, it is estimated that over RMB 60 million will be invested on gas generation. It is impossible to use natural gas as city fuel gas.
[0052]Preparation method is as follows: filtering liquid light hydrocarbon with 200-mesh ...
embodiment 3
[0060]In a certain county, population is 10,000 households and no pipeline network coal gas is supplied. Main fuel gas for citizens in the county is petroleum gas and coal. However, a fertilizer plant is established 5 kilo miles from the county. Part of emission gas from carbureted water gas in two-stage furnace for purpose of nitrogen fertilizer production is used as boiler fuel and all other part are released to air. Renovation is as follows: 50,000 M3 / day down blowing gas from the two-stage furnace is used as fuel of nitrogen fertilizer plant; the other released 1, 5000 M3 / day is stored gas-storing tank. All top blowing coal gas is collected for pipeline coal gas. Then we get 11, 3900 M3 / day with heat value of 3140 Kcal / Nm3, which could only enough to supply fuel gas for about 5,000 households. However, value of W 17.2 MJ / m3 and CP 86.48 is far beyond that of 5 R fuel gas, i.e., W 21.1-24.3 MJ / m3 and CP 55-96.
[0061]Preparation method is as follows: filtering liquid light hydrocar...
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