Operation of the lining of a model high-temperature hot-blast stove

In recent years great progress is made in technical equipment of large blast furnace in China. A series of new process, technologies and equipment, integrated and developed on our own, are applied on newly built large blast furnaces and have been proved to be highly effective. After more than 20 years’ development and innovation of the bell-less top equipment designed and developed on our own, it has reached the advanced level in the world in terms of equipment reliability and service life; fully-dry impulse bag filter dedusting technology of BF gas, which is also developed on our own, has gained technical breakthroughs in terms of optimized system design, gas temperature control, pneumatic conveying of dedusting fines; the integrated innovative high-efficiency long-life high-temperature technology, through applying high-temperature preheating technology of combustion air, improving heat transfer efficiency of hot blast stove and optimizing structure of the hot blast stove system, enables the blast temperature to reach 1250°C with BF gas as fuel.

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High temperature hot blast stove

Metallurgist ◽

10.1007/bf00734391 ◽

1957 ◽

Vol 1 (9) ◽

pp. 557-560 ◽

Cited By ~ 1

Author(s):

Yu. I. Gokhman

Keyword(s):

High Temperature ◽

Blast Stove ◽

Hot Blast

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Study and Design on High Temperature Air Combustion of Hot Blast Stove

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.496-500.1058 ◽

2014 ◽

Vol 496-500 ◽

pp. 1058-1062

Author(s):

Fu Ming Zhang ◽

Zu Rui Hu ◽

Shu Sen Cheng

Keyword(s):

High Temperature ◽

Concentration Distribution ◽

Cfd Simulation ◽

Formation Rate ◽

Flame Temperature ◽

Combustion Process ◽

High Temperature Air Combustion ◽

Blast Stove ◽

New Type ◽

Hot Blast

During Hot Blast Stove (HBS) combustion, NOxforms rapidly when the flame temperature above 1420°C. In order to restrain the amount of NOxformation during combustion of HBS, the formation mechanism of NOxis investigated, and the NOxformation rate and amount in HBS are calculated by means of thermodynamic model. A new type of dome combustion HBS is developed based on high temperature air combustion (HTAC) technology. A comparison on the combustion process and characteristic of conventional HBS and HTAC HBS is performed by application of Computational Fluid Dynamics (CFD) simulation model. Temperature and concentration distribution, flame shape and NOxconcentration distribution of two kinds of stove are calculated. The result shows quite symmetrical HTAC stove temperature distribution. Under the same dome temperature, NOxamount is 80ppm only, reduced by approximate 76% in comparison with conventional stove.

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Study on High Temperature Air Combustion of Hot Blast Stove

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.875-877.715 ◽

2014 ◽

Vol 875-877 ◽

pp. 715-719

Author(s):

Fu Ming Zhang ◽

Zu Rui Hu ◽

Shu Sen Cheng

Keyword(s):

High Temperature ◽

Field Distribution ◽

Combustion Process ◽

Concentration Field ◽

Generation Model ◽

High Temperature Air Combustion ◽

Blast Stove ◽

Campaign Life ◽

Higher Temperature ◽

Hot Blast

NOx is the major technical barrier to increase hot blast temperature and prolong campaign life of hot blast stove (HBS) at present. In order to restrain the amount of NOx formation during combustion process in the HBS, the paper studies and analyses the generation mechanism of NOx production, and calculates NOx generation rate and amount in HBS by means of thermodynamic generation model. A new dome combustion stove is developed based on high temperature air combustion (HTAC) technology. A comparison on the combustion process and characteristic of conventional HBS and HTAC HBS is performed by application of CFD numerical simulation model. Temperature and concentration field distribution, flame shape and NOx concentration distribution of two kinds of stove are calculated. The result shows quite symmetrical HTAC stove temperature field distribution. Under the same dome temperature, NOx generation is 80ppm only, reduced by approximate 76% in comparison with conventional stove. HTAC HBS can obtain higher temperature, energy-saving, emission-reducing, and decrease NOx emission efficiently, as well as realize long campaign life of HBS.

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Application of Fuzzy Predictive Control in Grain Drying Coal Burning Hot Air Furnace Temperature Control System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.530-531.981 ◽

2014 ◽

Vol 530-531 ◽

pp. 981-984

Author(s):

Yao Wu Tang ◽

Xiang Liu

Keyword(s):

Control System ◽

Predictive Control ◽

Fast Response ◽

Delay System ◽

Temperature Control System ◽

Large Delay ◽

Blast Stove ◽

Grain Drying ◽

Hot Blast ◽

Fuzzy Predictive Control

Grain drying with chain coalfired hot blast stove for temperature stable and economic operation.Boiler control objects with strong coupling, large delay, large inertia characteristics.Fuzzy control on object for low, fast response and predict advanced features. Design the fuzzy predictive controller for chain coalfired hot blast stove temperature control.The test results show that the fuzzy predictive control system is improved effectively the static precision and dynamic characteristic.Fuzzy predictive control for large delay system has better practicability.

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