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Supercritical once-through boiler capable of firing eastern Junggar coal

A supercritical once-through furnace and furnace technology, which is applied to steam generation, lighting and heating equipment, etc., can solve the problems of long-term, safe and complete combustion of power station boilers, and achieve the effect of saving huge investment.

Active Publication Date: 2014-01-01
章礼道
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem that the power plant boilers in the prior art cannot burn Zhundong coal in a long-term, safe and complete manner

Method used

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  • Supercritical once-through boiler capable of firing eastern Junggar coal

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Embodiment 1

[0035] Example 1: Supercritical DC Furnace ∏ Type Furnace Scheme Using Zhundong Coal

[0036] Combine now figure 1 Taking a 600MW level primary reheat Π-type utility boiler with main steam temperature / reheat steam temperature 571°C / 569°C as an example to illustrate the optimal way to realize the invention.

[0037] The supercritical once-through furnace for burning Zhundong coal in the present invention comprises a furnace and a burner (1), a partition superheater (2), a panel superheater (3), a high-temperature superheater (4), and a high-temperature reheater (5) ), folding smoke angle (6), low-temperature reheater (7), air-smoke ejector shut-off baffle (8), temperature-regulating air-smoke ejector (9), injector hot primary air adjustment baffle (10 ), injector deactivation protection cooling wind baffle (11), separated secondary air wind box (12), economizer (13); use very low furnace volume exothermic intensity; in boiler, low load and / or high temperature When the contami...

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Abstract

The invention discloses a supercritical once-through boiler capable of firing eastern Junggar coal, and relates to a supercritical once-through boiler which can be used by a thermal power station and is capable of safely and completely firing eastern Junggar coal for a long time. The supercritical once-through boiler comprises a hearth, a combustor, a divider screen superheater, a screen-type superheater, a high-temperature superheater, a high-temperature reheater, a flue deflection corner, a low-temperature reheater, an air-flue ejector shutoff barrier, a temperature regulating air-flue ejector, an ejector hot primary air regulating barrier, an ejector disable protection cooling air barrier, a separation secondary air bellow and a coal economizer. The ejector hot primary air regulating barrier is started when low and medium loads of the boiler and / or fouling factors of the reheaters are increased, so that the weight flow of temperature regulating flue and air mixtures can be adjusted between 0% and 30% of BMCR (boiler maximum continuous rating) flue gas weight flow. The supercritical once-through boiler has the advantages that the problem of severe slagging of an existing hearth in a eastern Junggar coal co-combustion procedure in the prior art can be solved; problems of fouling blockage corrosion of flue sides of high-temperature convection heating surfaces, increase of flue gas temperature, decrease of loading capacity and incapability of safely and completely combusting the eastern Junggar coal for a long time can be solved.

Description

(1) Technical field: [0001] The invention relates to a supercritical direct-current furnace using Zhundong coal, which relates to a supercritical direct-current furnace used in a thermal power station that can burn Zhundong coal in a long-term, safe and complete manner. (two) background technology: [0002] The Zhundong coalfield is a super-large coalfield located in Xinjiang, with predicted reserves of 3900×10 8 t, the mining cost is low. Zhundong coal has high moisture and volatile content, very low ash and sulfur content, and medium calorific value; Zhundong coal has an equivalent Na of about 1.0, which is a coal with serious pollution. [0003] When the power plant boilers in the prior art are blended with more than 40% of Zhundong coal, serious slagging occurs in the furnace burner area; High, load capacity decline and so on. When serious, the utility boiler of prior art is forced to shut down for maintenance. [0004] The main measures for the safe use of Zhundong ...

Claims

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Application Information

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IPC IPC(8): F22B3/08
Inventor 章礼道
Owner 章礼道
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