A kind of method that dimethyl ether is used for town gas reserve or peak regulation gas source

Abstract

A method for using dimethyl ether as a backup or peak shaving gas source for urban gas is completed according to the following steps: 1. Determine peak shaving users and delineate peak shaving areas; 2. Calculate their total gas demand; 3. The gas peak shaving users in the region shall evaluate the compatibility of dimethyl ether gas with the original gas and the adaptability of gas application equipment; 4. Carry out the technical transformation of the peak shaving user equipment and pipeline network; 5. In the peak shaving users and Install a disconnecting valve between the main networks; 6. Select the dimethyl ether supply method; 7. Check the gas pipeline network and ancillary facilities in the demarcated area; 8. When the gas source is peak-shaving, the gas supplier will cut off the original pipeline The in-use gas source in the city supplies dimethyl ether gas source, while the original gas source is directly dispatched to other gas users in the town. The invention not only alleviates the problem of tight supply of natural gas sources, but also solves the phenomenon of overcapacity of dimethyl ether, and can ensure the safety of gas supply, facilitate safe measurement of gas supply and fair pricing.

Description

Technical field: [0001] The invention belongs to the field of urban gas, and relates to a method for using dimethyl ether as a standby or peak-shaving gas source for urban gas. The method can use dimethyl ether as a standby or peak-shaving gas source in existing gas pipelines to supply Gas users in a certain area or independent industrial, commercial, and power plant users to replace the gas in the original pipeline network. Background technique: [0002] At present, the city gas industry is in a period of great development, and artificial coal gas, natural gas and liquefied petroleum gas are the main sources of city gas. At present, the import price of LPG is relatively high, and the supply of natural gas is in short supply. According to the forecast of relevant departments, by 2015, China's natural gas consumption will reach 240 billion cubic meters; the gap in 2015 will be 50 billion to 60 billion cubic meters, and the gap will reach 90 billion cubic meters in 2020. At ...

AI Technical Summary

Problems solved by technology

In recent years, the production capacity of dimethyl ether produced by coal chemical technology has reached 8-10 million tons per year. However, the current sales channel of dimethyl ether is single, the utilization rate of production equipment is low, and the production capacity is overcapacity. It is urgent to develop and utilize new ways

[0003] In many areas, due to the large amount of natural gas used for heating in winter, there is a serious imbalance between summer and winter gas consumption, resulting in a prominent problem of peak-to-valley differences in natural gas supply pipelines

The actual peak-to-valley coefficient is far greater than the peak-to-valley coefficient stipulated in the natural gas supply and marketing contract, and the greater the peak-to-valley coefficient, the lower the utilization rate of the pipeline, and the lower the gas transmission volume, which will cause great damage to the operation of the pipeline and the development of the downstream market. restrict

There is a gap of six, seven or even ten times the daily gas consumption of the gas transmission and distribution network in the city between winter and summer. On the one hand, due to the sudden drop in gas consumption in summer, the natural gas facilities are idle and wasted to some extent. On the one hand, due to the surge of gas load in winter, the gas supply pressure of the pipeline network has increased, and some large-scale users and equipment have been forced to shut down or use other fuels due to lack of gas sources.