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Adjusting boiler of low pressure section at cement kiln end

A low-pressure section and cement kiln technology, applied in the field of boilers, can solve problems such as waste of waste heat resources, and achieve the effect of improving power generation capacity and reasonable structure

Inactive Publication Date: 2009-09-02
南通万达能源动力科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of cement drying process is intermittent. When the drying process is not carried out for a considerable part of the time, this part of the waste gas at around 220 ° C is still discharged directly, resulting in waste of waste heat resources.

Method used

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  • Adjusting boiler of low pressure section at cement kiln end

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Embodiment Construction

[0010] A regulating boiler in the low-pressure section at the end of a cement kiln. In the same waste heat boiler at the end of the kiln, two steam-water systems with different pressure levels, high pressure and low pressure, are installed. The high-pressure system 1 uses the waste heat generated by the high-pressure main steam to directly enter the gas turbine 2 for power generation. Boiler, the exhaust gas temperature is controlled at about 220°C; the low-pressure system 3 generates low-pressure steam for recovering the waste heat of the waste gas, and supplies most of the low-pressure steam as supplementary steam to the steam turbine 2, and further reduces the exhaust gas temperature (below 180°C) kiln The tail low pressure section regulates the boiler. The range of regulating boiler working pressure is 0.5MPa~2.35MPa.

[0011] Also in the figure are a high-pressure drum 4, a low-pressure drum 6, a generator 7, a condenser 8, a condensate pump 9, a drain tank 10, a drain ta...

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Abstract

The invention discloses an adjusting boiler of a low pressure section at a cement kiln end. Two steam-water systems with different pressure levels, namely a high pressure steam-water system and a low pressure steam-water system are arranged in a kiln end waste heat boiler, wherein the high pressure system adopts a waste heat boiler which generates high pressure main steam entering a gas turbine to apply work so as to generate electricity, and the lower pressure system is the adjusting boiler of the low pressure section at the cement kiln end for recycling waste gas afterheat to generate lower pressure steam, using the low pressure steam as supplementary steam to supplement the gas turbine, and further reducing the exhaust gas temperature. The adjusting boiler of the low pressure section at the cement kiln end has a reasonable structure, can make full and reasonable use of all waste gas exhausted by a kiln end boiler, and improve the power generation capacity with the kiln end afterheat by more than 20 percent.

Description

Technical field: [0001] The invention relates to a boiler. Background technique: [0002] my country's cement production line has a large area and a large quantity. During the cement production process, the temperature of the waste gas available for the kiln tail preheater is about 300-400 °C, and its heat accounts for more than 20% of the total heat of the cement clinker firing system. If it is allowed to discharge , will cause a lot of energy waste and serious environmental thermal pollution. Using pure low-temperature waste heat power generation boilers to recover this part of the heat has become the only effective way to respond to the national basic national policy of energy conservation and emission reduction. Since the exhaust gas discharged from the pure low-temperature waste heat power generation boiler at the cement kiln tail is used to participate in the cement production process such as cement raw meal drying, the temperature of the waste gas required for cement ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F22B1/18F01K11/02F01K27/02C04B7/43
CPCY02P10/25Y02P40/121
Inventor 袁克陈俊陈新蔡永祥朱霞茅素梅陆海梅王拥
Owner 南通万达能源动力科技有限公司
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