A start-up recovery method of a generator set when the booster fan is not mechanically abnormal

A booster fan and generator set technology, which is applied to steam generation, lighting and heating equipment, control systems, etc., can solve the problems of shortening generator sets, etc., and achieve the effects of increasing diversity, reducing start-up costs, and low cost

Active Publication Date: 2016-06-22
DATANG HANCHENG NO 2 POWER GENERATION
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a method to reduce the number of "unplanned outages" to a certain extent, shorten the start-up time of the generating set, save fuel and manpower loss, and make the operating mode of the generating set more flexible. In the case of a non-mechanical accident of the supercharger fan, the economic loss is minimized, the economic benefit is obvious and the application prospect is very broad. The method of starting and restoring the generator set when the supercharger fan is not mechanically abnormal

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  • A start-up recovery method of a generator set when the booster fan is not mechanically abnormal
  • A start-up recovery method of a generator set when the booster fan is not mechanically abnormal
  • A start-up recovery method of a generator set when the booster fan is not mechanically abnormal

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specific Embodiment 1

[0035] Embodiment 1 of the present invention: a method for starting and restoring a generator set when the booster fan is not mechanically abnormal, which is characterized in that it includes the following steps:

[0036] Step 1: Reduce the resistance of the flue gas desulfurization system, and start the ventilation group of the boiler under the condition that the desulfurization process system has ventilation conditions and the booster fan has idle running;

[0037] Step 2: After the ventilation group is started, control the boiler ventilation group to increase the total air volume of the boiler and prompt the rotor of the booster fan to rotate. When the total air volume reaches the purging condition, the boiler is purged, and the boiler is ignited after purging;

[0038] Step 3: After ignition, increase the load of the generator set, continuously control the outlet pressure of the induced draft fan to make it fluctuate in a small range, and make the total air volume rise in a...

specific Embodiment 2

[0053] Specific embodiment two of the present invention: a kind of method for starting and recovering the generator set when the booster fan of the 600MW unit is not mechanically abnormal, comprising the following steps:

[0054] Step 1: Reduce the resistance of the flue gas desulfurization system, and start the ventilation group of the boiler under the condition that the desulfurization process system has ventilation conditions and the booster fan has idle running; the ventilation group includes a blower, an induced draft fan, and raw coal for grinding The pulverizing system is used to deliver pulverized coal to the boiler for combustion. When the start-up conditions are met, first start the induced draft fan and the blower fan, and control the negative pressure of the furnace at about 100Pa; then open the movable blade of the blower fan, and make sure that the induced draft fan is adjusted normally, and the outlet pressure of the induced draft fan does not fluctuate greatly; ...

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Abstract

The invention relates to a starting and recovery method for a generator set during non-mechanical abnormality of a booster fan. The method comprises steps as follows: Step 1: reducing the resistance force of a flue gas desulfurization system and starting a ventilation set of a boiler when a ventilation condition of a system and a coasting operation condition of the booster fan are met; Step 2: adjusting the ventilation set of the boiler, so that the total air volume of the boiler can be increased, and igniting after purging; Step 3: increasing the load of a unit after ignition, so that outlet air pressure of a draught fan and the total air volume of the boiler can wavelike rise at smaller amplitude; Step 4: controlling the load of the generator set and the total air volume of the boiler after the booster fan meets a starting condition, and starting the booster fan; Step 5: adjusting parameters for recovery of normal load of the generator set, so that normal operation of the unit is realized. The unit can be quickly started during MFT (master fuel trip), caused by non-mechanical fault trip of the booster fan in the thermal generator set, of a drum boiler with the starting and recovery method, and an unplanned outage accident caused by forced tripping of the generator set when the booster fan needs to be overhauled after MFT of the drum boiler is avoided.

Description

technical field [0001] The invention relates to a method for starting and restoring a thermal power generating set, in particular to a method for starting and restoring a generating set when a booster fan is not mechanically abnormal. Background technique [0002] With the current environmental pollution becoming more and more serious, coupled with the increasingly stringent national environmental protection policies, newly-built pulverized coal boilers are designed to be equipped with desulfurization devices, and the flue gas system of the generating units that were not installed with desulfurization devices has been modified and added. desulfurization device. Since the flue gas flows through the original flue, flue gas heat exchanger (GGH), absorption tower, clean flue, baffle door and other resistance equipment, it is necessary to install a booster fan to overcome the resistance of the entire desulfurization system equipment, which is to ensure desulfurization Important ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B35/00
Inventor 段武仓杨宏彦王六四
Owner DATANG HANCHENG NO 2 POWER GENERATION
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