System and method for combined recovery of waste heat from flue gas from glass melting furnace and waste heat from annealing kiln

Abstract

The invention discloses a power generating system and a power generating method by jointly recycling waste heat of glass melting kiln flue gas and annealing kiln waste gas and belongs to the technical field of waste recycling in the glass industry. The power generating system comprises a glass melting kiln flue gas treatment and waste heat utilization system, an annealing kiln waste gas waste heat utilization system, a steam turbine generating system and a related auxiliary system, wherein a waste heat boiler is utilized to recycle the glass melting kiln flue gas waste heat, and a water preheater is utilized to recycle the annealing kiln waste gas waste heat, so that a boiler feed-water temperature is increased to prevent corrosion of the tail part heated surface of the boiler; and meanwhile, a high-temperature electric dust collector is arranged to prevent a catalyst in a denitrification reactor from being poisoned and to prevent surface blockage. According to the power generating system, waste heat resources of the glass melting kiln flue gas and the annealing kiln waste gas are effectively utilized, so that the waste heat recycling efficiency of a glass production process is improved, and power generating capacity of a waste heat power generating system is increased.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery in the glass industry, and in particular relates to a power generation system and method for combined recovery of waste heat from flue gas from a glass melting kiln and waste heat from an annealing kiln. Background technique [0002] As the basic industry of the national economy, the glass industry is also one of the major energy-consuming and heavily polluting industries. Relevant data show that in 2010, the total output of flat glass in my country accounted for about half of the global output. However, in the production process of flat glass in my country, heavy oil is mainly used as fuel, and the flue gas discharge temperature of the melting furnace is relatively high, which also causes serious air pollution problems. The main pollutants are dust, SO 2 and NOx. [0003] With the continuous development and improvement of the glass industry, the waste heat utilization method in the ...

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Problems solved by technology

[0004] The purpose of the present invention is to propose a glass furnace for the problem that the flue gas waste heat power generation system only recovers the waste heat of the glass melting furnace flue gas in most of the glass production processes currently in operation and under construction, while the hot waste gas of the glass annealing kiln is directly emptied. System and method for combined recovery of furnace flue gas and annealing kiln waste gas waste heat combined recovery power generation system

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