| Case Introduction:
Lanzhou Lanshi stone machinery and equipment limited liability company (Lanshi stone Limited)is a large state-owned enterprise primary in refining chemical industry and general machinery manufacturing,with trade and industry as a whole.Lanshi Stone Co.,Ltd¡¯s original name is Lanzhou Petrochemical Machine Plant Co., Ltd(Lanshi stone factory)founded in 1953,which is China's largest oil drilling and refining machinery equipment manufacturing base.It lies in Lanzhou City,Gansu Province.
Lanshi Stone Co.,Ltd is now attached to Lanzhou Petrochemical machinery and equipment Co.,Ltd.(Lanshi stone group)which is a joint venture established by refinery and petrochemical equipment manufacturers and thermal processing parts of Lanshi stone group and China Huarong Asset Management Corporation.Lanshi stone group consists of 11 wholly-owned companys and subsidiaries,8 branches (plants).In addition to petrochemical production machinery,refinery and petrochemical equipment,general machinery and steel-making,it also operates in real estate development,material storage and transport operators,market development and agricultural production,etc.Lanshi stone import and export company has the independent import and export rights,and some products are sold to the United States,Japan Argentina,the United Arab Emirates,Indonesia,Turkmenistan and more than 10 other countries and regions.
Reconstruction project of large regenerative forging furnace
Indicators before reconstruction :
 Heating parts: big forging par
Temperature: 1250 ¡æ t
Types of fuel: natural gas Fuel heat value: Qd = 8400 ¡Á 4.18kJ/m3 The original furnace shape: curved dome Materials input and output methods: trolley Original furnace burner: top-flame burner Exhaust method: End side exhaust Air, gas preheating: no preheating Thermal efficiency of original furnace: h <25%
Technical indicators after reconstruction:
Gas temperature: 70 ¡æ Air preheating temperature: 1300 ¡æ Average fuel consumption: <60m3 / h Average thermal efficiency of the furnace: ¡Ú 48.5%
Picture of the scene:
Large-scale of forging part furnace before reconstruction:
Large-scale forging part furnace after reconstruction:
Outer door scene of Lanshi stone Group:
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