Extensive development and utilization of industrial drying equipment started in the early 1970s in China. Great progress has been made both in depth and in breadth since the implementation of the policy of reform and opening-up. At present, in many places exploitation depth is 2,500m and occasionally over 3,500m. Geothermal water with a maximum temperature of 250¡æ(Well ZK2001, at Yangbajain, Tibet)has been extensively used for power generation, heating, industry, medical treatment, bathe, aquaculture, greenhouse, mineral water production and irrigation(Fig. 2.5.2). Since China"s geothermal resources are characterized by moderate to low temperature, the development of geothermal resources for room heating in cities and towns and constructing hot spring hotels has taken shape. In some areas geothermal resources industry has formed and achieved remarkable social and economical returns. The geothermal station of Tianjin Bureau of continuous drying equipment, for instance, has exploited geothermal water at the depth of 3,323.09m(water temperature 84¡æ, discharge 150m3/h)to provide 100, 000 m2 room heating for local residents. In Kunming City, a "Green World Hot Spring Vacation Center"was built around a hot water well, with over 100 people employed and nearly RMB 10 million yuan of profits and tax been paid annually to the state. Since the 1980s, the government of Yingshan County in Hubei Province has expanded the development of geothermal resources to involve 109 projects, covering 8 fields of agriculture, industry, bathe, tourism, etc., with an output value of RMB 45 million yuan. Geothermal resources development has become a new and unique industry in local economy.Henan Hongxing Mining Machinery Co., Ltd is the professional manufacturer of complete sets of mining machinery, for example,rotary dryers,stone crusher Welcome all of you to visit our official website.
According to the statistics on the exploration(investigation)of geothermal fields in 1997 made by the Bureau of Management ofrotary dryer for sale and Reserves under the former Ministry of Geology and Mineral Resources, of the total 761 geothermal fields in China, 434 geothermal fields are being developed or partly developed at the present, accounting for 57%; the other 327 geothermal fields, which make up 43% , have not been developed or have no clear statistics. In those geothermal fields that have already been utilized, totally 943,976 m3/d of geothermal water have been pumped out and 1 762.56MW of heat energy have been used, equal to the caloric value of 1.896 million ton of standard coal.