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Emergency cooling system for supercritical circulating fluidized bedboiler and control method thereof

A circulating fluidized bed and emergency cooling technology, which is applied in steam boilers, control systems, steam generation, etc., can solve the problems of high emergency water pump head, small equipment operation and maintenance workload, and large equipment operation and maintenance workload.

Active Publication Date: 2018-09-28
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a solution for the emergency water supply system of circulating fluidized bed boilers. The emergency water supply pump has a high head, high power and is driven by a diesel engine, which leads to high initial investment and heavy workload of equipment operation and maintenance in the later stage. An emergency cooling system for a supercritical circulating fluidized bed boiler with low power consumption, low initial investment, and small equipment operation and maintenance workload and its control method

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  • Emergency cooling system for supercritical circulating fluidized bedboiler and control method thereof

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[0019] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "or / and" includes any and all combinations of one or more of ...

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Abstract

The invention relates to an emergency cooling system for a supercritical circulating fluidized bedboiler and a control method thereof. The emergency cooling system comprises a heat exchanger, a furnace water circulation cooling device and an external circulation cooling device, wherein the furnace water circulation cooling device and the external circulation cooling device are connected with the heat exchanger correspondingly; when a boiler water supply is interrupted, the heat storage capacity of a hearth and castable in the hearth are continuously transferred into an external circulation cooling device through water from a coal economizer collection box or a water storage tank and a cooling medium in a storage container which are fully exchanged in the heat exchanger, so that the purposeof the emergency cooling of the bedboiler is achieved. The emergency cooling system for the supercritical circulating fluidized bedboiler and the control method thereof are provided, wherein the liftof a furnace water circulation pump and the lift of an external circulation pump only overcome the resistance of the heat exchanger and the resistance of a pipeline, power is not high and a diesel engine driven is not needed, so that the initial investment of a system is low, the operation and maintenance workload of a later-stage equipment is low.

Description

technical field [0001] The invention relates to the technical field of supercritical circulating fluidized bed boilers, in particular to an emergency cooling system for supercritical circulating fluidized bed boilers and a control method thereof. Background technique [0002] Circulating fluidized bed boiler (CFB) has the advantages of wide fuel adaptability, wide capacity range, high combustion efficiency, low-temperature combustion, low nitrogen oxide emissions and direct desulfurization during combustion, making it a low-combustion boiler. Volatile matter, low calorific value and low-quality fuel power plant boilers are the preferred furnace type. [0003] Circulating fluidized bed boilers are different from pulverized coal boilers. The furnace is a fluidized bed formed by a considerable amount of bed material, and the fuel particles are ignited and stably burned by heating the fluidized bed material. Because there are a large number of bed materials and refractory casta...

Claims

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Application Information

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IPC IPC(8): F22B31/00F22B35/00
CPCF22B31/0061F22B35/00
Inventor 尹进刘广林张翔宇霍沛强
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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