Integrated waste heat boiler with steam temperature capable of being controlled and implementation method

Abstract

The invention relates to an integrated waste heat boiler with the steam temperature capable of being controlled and an implementation method. A dust removing and heat exchange integrated structure isadopted. A dust removing device comprises two square settling chambers which are in parallel. An air inlet is located in the side face, and an ash discharging outlet is formed in the bottom. A modularsecondary medium-pressure superheater is arranged at the outlet position of the high-temperature settling chamber, and a smoke wind flow control valve is arranged on the back portion of the superheater to be used for controlling the wind volume. Flue gas at a valve outlet and flue gas at an outlet of the medium-temperature settling chamber enter a modular secondary medium-pressure evaporator after being mixed, and then the flue gas enters a modular secondary medium-pressure economizer, a steering flue, a modular low-pressure superheater, a modular low-pressure evaporator, a hot water section,a flue gas outlet and an ash bucket in sequence. Steam-water separators are arranged at the top of a secondary medium-pressure section and the top of a low-pressure section separately. All modular heat exchange surfaces are stacked onto a steel frame. The integrated waste heat boiler with the steam temperature capable of being controlled has the technical benefits that the structure is compact, installation is convenient, the quantity of heat losses is small, and the system resistance is small; and moreover, the steam temperature can be controlled, the steam flow is adjusted and the boiler can operate in a more-efficient mode.

Description

technical field [0001] The invention relates to an exhaust gas waste heat recovery boiler, in particular to an integrated waste heat boiler capable of controlling steam temperature and a realization method thereof. Background technique [0002] At present, the pure exhaust gas waste heat power generation technology in the cement industry at home and abroad has become stable after years of development. The technical process of each company is roughly the same, but the power generation per ton of clinker varies greatly, which is one of the main reasons for affecting power generation. It is the boiler design, especially the design of the kiln head boiler. As we all know, during the cement kiln production process, due to the limitation of the kiln line and other influences, the waste heat exhaust gas temperature and exhaust gas flow of the kiln head fluctuate greatly, which has a great impact on the stability and power generation efficiency of the waste heat power generation sys...

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Problems solved by technology

As we all know, during the cement kiln production process, due to the limitation of the kiln line and other influences, the waste heat exhaust gas temperature and exhaust gas flow of the kiln head fluctuate greatly, which has a great impact on the stability and power generation efficiency of the waste heat power generation system; Dust particles will cause wear and tear on the heating surface of the boiler, so dust removal devices are installed before the kiln boiler, but at present, most of them use independent settling chambers or cyclones, independent waste heat boilers, and smoke and air pipes are used to connect equipment, thus causing a large number of Heat loss, and the equipment occupies a large area and the construction period is long

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