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Should zhang natural gas pipeline engineering pipe long stretches 245 kilometers, in planning YangYuan, xuanhua, dongshan industry via flow ping temple at the end of three standing set. Refugee camps leveling by dongshan industry into the gas station will temple urban area. May 17, should zhang gas pipeline engineering ventilation, and natural gas high pressure ignition variable medium voltage supply and the city gas pipeline network has laid most complete, this means that starting this year, citizens will have a green use natural gas that clean energy.
Gas supply situation
Zhangjiakou city gas project started in 1986, design gas residents to 5 million households. After 20 years of development, the user scale increasing range of gas supply, currently involved in zhangjiakou civil and commercial, male and industrial and other kinds of user 11 million to spare. Urban gas supply mainly XuanGang coking plant source, gas tight supplies for the situation gradually appear. Winter gas especially tight, urban gas supply size of the average every 11 million cubic meters. Use off-season daily summer gas scale up to 9 million cubic meters is. Annual average gas scale has reached 10 million cubic meters, spreads. Xuanhua dongsheng road and urban dongshan two reserves stood there were 3 million cubic meters and 5 million cubic meters of reserves, construction is the beginning of the gas pipeline pressure as in order to adjust the air after being now, also all in daily gas use.
Is the gas source zhangjiakou promotion for the shanxi-beijing natural gas line should zhang feeder, petrochina changqing gas field, adapted for the shanxi-beijing a starting point of shanxi so pressure station, accompanied by YangYuan ShuoZhouShi, datong county, XuanHuaXian, end point for county, east industry gathering area zhangjiakou. Piping planning, including hebei stretches 245 miles along set, section 145 kilometers &block valve station four seats, 10 seats. The project in May 12, 2008, spent three years building formally started in this year, 17 May ventilation ignition. Marks should zhang gas long-distance pipeline to link up, reach across zhangjiakou trial operation conditions try ventilation.
At present, the city gas corporation has formulate concrete replacement plan throughout the whole city, will promote natural gas replacement work.
Gas advantage
Residents convert gas has a lot of advantages.
Natural gas is a kind of clean energy. It hardly contain sulfur, dust and other pests qualitative, when burning less than other fossil fuels produce carbon dioxide. Colorless, odorless, non-toxic and non-corrosive, the main composition is methane, also including a certain amount of ethane, propane and heavy hydrocarbons. Combustion products mainly carbon dioxide and water. Than other fossil fuels, and natural gas combustion emissions of carbon dioxide when only a dust and extremely trace carbon monoxide, hydrocarbons, nitrogen oxides. The pollution caused by the combustion is only oil 1/40, coal 1/800. Greenhouse is low, and can therefore radically improve the environment quality.
Natural gas is economical. Natural gas calorific value and high thermal efficiency, for 93 to 10,000 calories, the 2.3 times is artificial and gas than the artificial coal gas, durable. Natural gas more than 75 percent of the thermal oil, it, even the thermal efficiency also only 65%. Compared with the artificial coal gas, natural gas, and the price is fairly year-on-year calorific value can extend a kitchen clean, the service life, also be helpful for users to reduce maintenance costs spending.
Natural gas is safe and reliable. Natural gas lighter than air, once leakage, upward proliferation, not easy immediately formed explosive gas accumulation, safety is higher. It does not contain carbon monoxide, not easy cause poisoning accidents.
Natural gas as a high-quality gas fuel, with its artificial coal gas, liquefied petroleum gas (LPG) than more clean, quick, efficient, safe advantage has been widely adopted, especially the world of environmental protection the positive role has become the concern of the public.
Reform steps
Gas conversion project is a careful complex work, city gas company strive to orderly safe. Conversion process, to ensure the normal operation of the gas transmission and distribution system, first not destroy gas ring net. Refer to the original gas ring network, a pressure regulator and the user's distribution division conversion area. According to the distribution of gas pipeline network, convertible preferred quantities is small, can be directly transform the user switching to natural gas pipeline. In view of the gas transport zhangjiakou is bysouthing north, so the gas transformation project from north to south, in accordance with the order of QiaoDong semba first after gas pipeline, gradually exit.
Gas replacement currently has two options. One is in medium voltage tube medium-voltage tube after converting low-pressure pipe, cut off when converting coke oven gas pipeline connection medium and low pressure, low voltage network with other district in the connection between. Then input in the low-pressure pipe gas, or burning, radiation point radiation until gas sampling concentration to meet requirements. This scheme is the advantage of fast speed, user displacement effect is small, but the safety of gas radiation waste, radiation area with a certain degree of air pollution, more manpower. Another way is low in partition coke oven gas pipeline, not conversion, but in user radiation gas converted ranju burn on until the combustion normal, this scheme to convert time is long, the user poor safety, but can continuous gas supply. At present, the transformation in zhangjiakou first scheme is given priority to, the second scheme as auxiliary.
In the two years of the gas conversion project, gas pipeline and the gas implementation status quo division transformation; Three area (nine subdivision area more than 50,000 residents users involved door.
Ⅰ area: dry, including army beiwaionline ring, shangri-la, hydrologic and water companies, fish piedmont street name Calvin gardens, backstreet, namely no.3 east mouth to xiba hillock road and xinhua street intersection, is expected to start late June this year. 18676 households were involved in the resident.
Ⅱ area: north (semba), including west inner riverside to xinhua street, plan completion time characteristics of August to September. 7516 households were involved in the resident.
Ⅲ area: xiba hillock road, including xiba hillock road, xinhua street intersection, string of kiln street beixin village, plan to finish time, this October to December. Zone 24223 households resident.
In order to ensure smooth changeover job, natural gas, coal gas corporation has launched the preparation, including seconded specialized technical personnel, supply of gas transmission pipeline supply facilities thorough examination, the transformation replacement and lift pressure experiment debugging. Meanwhile, in-depth residents' home in indoor security and brushing glue. Air in uninterrupted supply conversion or at most a day on the premise of continuous. In the meanwhile, have yet to convert residential neighborhood would guarantee the normal conversion coke oven gas supply. In implementing area prior to the conversion, city gas corporation will check all the valve and pipeline network interfaces and the affiliated facilities along pipeline. Low pressure pipe networks to coagulate water jar will still be retained. When converting coke oven gas perfedt cut off. The whole village gas replacement work once completed.
note
Because the natural gas and the combustion characteristic of different artificial coal gas, the original supply system and some flow in ranju must have corresponding transformation or replacement.
The abandonment of the artificial coal gas flow of 6 years. Currently most residents downtown monthly pay flow user fee, this part of the complex for user, when flow when arrive, city scrapped fixed number of year for its gas corporation will be replaced free new flow. Without pay after buy fee of users should be in change new table according to the standard disposable 2.5 yuan per month for neat. For old residents of the area network maintenance and replacement cost, all by the gas company to assume.
All the displacement of the original user should use gas stoves, replace or renovation. Does not conform to the requirements of the use of natural gas burner or artificial coal gas burner without transformation in displacement ventilation, after connecting with natural gas pipeline are forbidden to use.
Don't conform to transform the stove has: without conditions; cooktop saver Reach scrap the fixed number of years the kitchen; Shutdown, eliminated, parts has no universal, unable to transform fires; "3 without" products; Kitchen burning deformation, aging, spare parts badly corroded cannot transformation products etc.
In determining the replacement of 10 days before work, are gas corporation to replacement area residents will be issued publicity material, points for attention and is worth 100 yuan transformation card. All the users with kitchen in reconstruction conditions for its kitchen staff, return after reconstruction transform card; Kitchen does not conform to transform condition, need to replace cookers users, can choose and buy new kitchen in reconstruction site, transforming card would be deducted from 100 dollars in cash.
Transforming a process, and the gas company will stop for replacement area users supply for a day or two. Before modification have gas, a layer of total valve by households, home must hold responsible shut off the main valve staff. Each gas users timely closed before valve to prevent natural gas focal when replacement accidents. Natural gas replacement day, forbidden to users who open the valve ignition gas testing, must by the gas company staff replacement ignition, confirmed only after normal user gas.
Natural gas replacement is completed, the original gas burner without reform, gas water heater, gas cainuanlu, gas oven gas such as use is forbidden .