Device and technique using rotary kiln barrel heat to generate power

Abstract

The invention relates to a device and technique using rotary kiln barrel heat to generate power. The device comprises a rotary kiln barrel, a first wheel belt, a second wheel belt, a third wheel belt and a kiln-head dual-pressure waste heat boiler. A deaerator and a medium-pressure water feeding pump are arranged at the water feeding end of the kiln-head dual-pressure waste heat boiler; a first heat exchanging face, a second heat exchanging face and a third heat exchanging face are sequentially arranged at the position, between the first wheel belt and the second wheel belt, on the surface of the rotary kiln barrel; a fourth heat exchanging face, a fifth heat exchanging face, a sixth heat exchanging face and a seventh heat exchanging face are sequentially arranged at the position, between the second wheel belt and the third wheel belt, on the surface of the rotary kiln barrel; and the heat exchanging faces are sequentially provided with membrane type water cooling walls, thermal-insulation rock wood and casings from inside to outside. The device solves the problems that a traditional method using rotary kiln barrel heat to generate hot water is low in waste heat utilizing efficiency and large in production fluctuation caused by seasons. Furthermore, the device solves the problems that a method using rotary kiln barrel heat to heat condensation water to generate power affects the boiler efficiency and is small in generating capacity. Finally, the rotary kiln barrel heat can be efficiently utilized.

Description

technical field [0001] The invention relates to the field of cement kiln waste heat utilization, in particular to a device and a process for generating low-pressure steam by absorbing the heat of a cement rotary kiln cylinder and generating electricity. Background technique [0002] The cement industry is a big consumer of energy and a big waste. In the large-scale dry process cement production line, due to the limitation of calcination technology and production process, the low-temperature waste heat below 350 ℃ discharged externally accounts for more than 35% of the total heat consumption of the cement clinker sintering system, of which the rotary kiln barrel at 250-350 ℃ Body surface heat loss accounts for about 5%. The existing cement kiln waste heat power generation technology only uses the waste heat of the flue gas discharged from the cement production line. For the heat dissipation on the surface of the rotary kiln shell, direct heat exchange is generally used to ge...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of efficient utilization of cement rotary kiln shell heat, specifically to solve the problems of low waste heat utilization efficiency and large production fluctuations affected by seasons in the traditional way of using the heat of the rotary kiln shell to generate hot water. And solve the problems of the thermal heating of the rotary kiln shell and the utilization of condensate water for power generation, which affect the boiler efficiency and the small power generation, and finally realize the high-efficiency utilization of the rotary kiln shell heat

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