Self-provided power station boiler and cement kiln waste heat recovery coupling system

Abstract

The invention discloses a self-provided power station boiler and cement kiln waste heat recovery coupling system, and belongs to the technical field of cement production waste heat recovery and boilers. The self-provided power station boiler and cement kiln waste heat recovery coupling system comprises a kiln head waste heat recovery system, a rotary kiln waste heat recovery system and a power station boiler system; the kiln head waste heat recovery system comprises a grate cooler, a first dust removal device, a waste heat boiler, a second dust removal device, an induced draft device, a pressurizing air device and a connecting pipeline; the rotary kiln waste heat recovery system comprises an air supply device, an air heating device and a connecting pipeline; and the power station boiler system comprises a boiler, a primary air pipeline, a primary air preheater, a secondary air pipeline and a secondary air preheater. According to the self-provided power station boiler and cement kiln waste heat recovery coupling system, the overall power generation efficiency of a project for power generation can be effectively improved, the energy waste existing in the cement industry can be reduced, and the multiple purposes of effectively improving the overall power generation efficiency of the project for power generation, improving the operation efficiency of cement production and reducingthe operation energy consumption can be achieved.

Description

technical field [0001] The invention belongs to the field of cement production waste heat recovery and boiler technology, and in particular relates to a self-provided power plant boiler and cement kiln waste heat recovery coupling system. Background technique [0002] Because the cement production process itself needs to consume a lot of energy and there is a lot of energy waste in the cement production system, the cement production has become a well-known energy-consuming household, which requires a large amount of power consumption. In order to reduce energy consumption and solve power supply, conventional There are waste heat power generation projects in cement kiln construction. Since waste heat power generation projects usually use low parameters, the overall efficiency of waste heat power generation is only 18-20%, and the recovery and utilization rate of waste heat is very low. Some cement plants, especially some relatively backward countries in foreign countries, bui...

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Problems solved by technology

[0002] Because the cement production process itself needs to consume a lot of energy and there is a lot of energy waste in the cement production system, the cement production has become a well-known energy-consuming household, which requires a large amount of power consumption. In order to reduce energy consumption and solve power supply, conventional There are waste heat power generation projects in cement kiln construction. Since waste heat power generation projects usually use low parameters, the overall efficiency of waste heat power generation is only 18-20%, and the recovery and utilization rate of waste heat is very low. Some cement plants, especially some relatively backward countries in foreign countries, build self-provided power plants to generate electricity to meet the electricity demand of cement production. Usually, self-provided power plants adopt relatively high parameters, and the overall power generation efficiency of the power plants is compared with waste heat. The overall power generation efficiency of power generation has been greatly improved, but it still cannot meet the higher efficiency requirements

Therefore, there are problems of energy waste and low waste heat recovery utilization rate in self-provided power plants and cement industry. It is necessary to further improve the overall power generation efficiency of power generation projects, improve cement production and operation efficiency, and reduce operation energy consumption.

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