Application technology of internal and external sliding type direct buried steam insulation pipe Wu Yufeng internal and external sliding type direct buried thermal insulation steam pipe construction technology is widely used, characterized by reliable quality, safe operation, convenient maintenance, quick construction, effectively reducing heat loss and maintenance costs. From the construction of the urban expressway to the Binhai New Area rapid rail transit project, it has been widely praised by users. 1Inside and outside sliding type direct buried steam insulation pipe construction characteristics The steam transmission pipe is connected by seamless steel pipe argon electric welding method, and the outer insulation material is made of high temperature resistant ultrafine glass wool, which has the advantages of high temperature resistance, less joints and good ventilation. Once the insulation layer enters the water during the construction process, it can completely dry the drainage point by gradually heating up, which is widely praised by users. tide. Its shape and insulation properties remain good after drying. The sliding bracket has reasonable structure, small sliding friction force, small internal and external fixing frame, low cost, simple mechanical analysis and high safety. The internal fixed point does not need to be poured with concrete fixing pier, which greatly reduces the civil construction cost and construction period. The thermal insulation jacket adopts a steel pipe jacket, and a certain air layer is left with the thermal insulation layer to facilitate sliding and tidal drainage. The steel jacket of the field is connected through the sliding steel outer casing, and the joint operation is performed by the root splicing method, compared with the conventional filling method. It can reduce the number of outer casing welds by 40 45%. With 150,000 yuan / piece, civil construction, equipment and installation 200,000 yuan / piece), water source well service life of 20 years; each water source well lifting pump 1 unit, power 50kW, daily operation 15h flow rate 80 / h each water source well 2 operators, labor wages 800 yuan / month; annual maintenance costs of each water source well 15,000 yuan. Among them: 1) electricity costs 50X 950 yuan per day; 2) daily maintenance costs: 8 mine Water treatment costs and annual purification and utilization of mine water costs. The annual water treatment capacity of the mine water is 5.04 million tons; the annual purification and utilization of mine water costs is 917,300 yuan; the water treatment cost is 0.182 yuan/t (excluding water supply and electricity charges). Calculation basis: the project investment is 5.23 million yuan, of which the civil engineering project is 2.7 million yuan. Equipment engineering 2 million yuan, installation project 500,000 yuan, other expenses 250,000 yuan; civil construction depreciation according to 40 years, equipment depreciation according to 20 years; equipment annual maintenance fee according to equipment investment 2%; electricity price 0.52 兀 / kW, mine water treatment Effective power 42kW Water supply effective power 30kW~ 13 operation managers, labor wage 1100兀 / month; Polyaluminium chloride (PAC) 000兀 / t, dosage 30mg / L; Polyacrylamide (PAM) 20000 yuan / t , the dosage is 0.3mg/L; the treated water volume is 14000/d, and the effective production days are 360d years. Annual economic benefit = annual exemption of deep well water cost + annual exemption of sewage charges One year purification and utilization of mine water costs = 137.97 + 40.32 (0.08 兀 / tX 5.04 million) - 91.73 = 865,600 yuan, significant economic benefits. 42 Environmental Benefits After the mine water purification treatment in the Tunliu Coal Mine, the annual discharge of suspended solids can be reduced by 930 tons, and the environmental benefits are obvious. 44 Social Benefits As a production and domestic water, the mine water purification treatment can reduce the exploitation of underground deep well water, save groundwater resources, protect the natural balance of groundwater and surface water in the mining area, and solve the environmental problems caused by overexploitation of underground deep well water. Improve the relationship between coal mining enterprises and surrounding villages; solve the contradiction between increasing water consumption in mining areas and increasing shortage of water resources, ensure the normal production and operation of coal mining enterprises, improve the comprehensive benefits of coal mining enterprises, and promote the sustainable development of mining areas . 5 Conclusion The annual mine water discharge in China is about 2.2 billion tons, while the resource utilization rate of mine water is only about 20%. A large amount of untreated mine water is directly discharged, which not only pollutes the environment, but also wastes valuable Mine water resources. In the arid area of ​​Shanxi, the Yuliu coal mine is poor in water resources. The coal mine is seriously deficient in water and the production and domestic water is tight, which restricts the sustainable development of coal production and mining economy to a considerable extent. The mine water purification treatment project in Tunliu Coal Mine is a key project in the construction of the Tunliu Mine. It is responsible for supplying drinking water and water to the mine, supplying production water to the mine, supplying production water to power plants and coal washing plants, and its economic and social benefits. Very large, its processing technology in other coal mining areas, there will be broad prospects for promotion. (Finish)
Shandong Tiancheng Paper Making Auxiliary Series
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Shandong Tiancheng Chemical Co., Ltd. was established in 1999, located in Shandong Yanzhou Chemical Industry Park of Economic Development Zone, a high- tech enterprise on business of research, development, produce, trade etc. with registered capital of 60 million yuan and total assets of 350 million yuan and 360 employees. The main products cover paper chemicals, rubber and plastic chemicals, pharmaceutical intermediates, pesticide intermediates, fundamentals of chemical engineering etc. The products are not only sold throughout the country, but also exported to North America, Europe, Japan, Korea, Southeast Asia and other countries or regions. The quantity, quality and technology of paper chemicals leads top in the world. The share is more than 20%, covering 40% of domestic market. Paper chemicals and Environmental plasticizers have passed Pony testing and certificated by SGS testing.
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