A single-side exhaust gas temperature rise test method to control the blockage of air preheater

An air preheater and test method technology, which is applied in the testing of machine/structural components, combustion methods, instruments, etc., can solve the problems in the selection of operating parameters, the treatment effect is difficult to be guaranteed, and the blockage of the air preheater cannot be solved in time. and other problems to achieve the effect of improving the level of safe and economic operation

CN111964928BActive Publication Date: 2022-02-18HUADIAN ELECTRIC POWER SCI INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-02-18

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Abstract

The invention discloses a single-side exhaust gas temperature rise test method for controlling air preheater blockage, which belongs to the coal-fired power generation industry and mainly includes test basic conditions and requirements, test operation and requirements, test risk points and control measures, and test methods. Effect evaluation, etc. The basic conditions and requirements of the test include the preparation before the test and the requirements of the test working conditions. The test operation and requirements include the adjustment method of opening the outlet contact door of the blower, the adjustment method of closing the contact door of the blower outlet, and the common operating points and requirements of the two adjustment methods. The risk points and control measures of the test include air preheater tripping and low-temperature corrosion, induced draft fan vibration and high bearing temperature, high flue gas temperature at the inlet of the desulfurization system, blower surge and stall, and the test effect evaluation includes the flue gas of the air preheater on the heating side The three evaluation indicators are the differential pressure drop on the side, the drop rate of the differential pressure on the flue gas side of the air preheater on the warming side at the target temperature, and the increase in power consumption in the test. The invention can ensure safe and economical operation of the unit.
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Description

technical field

[0001] The invention relates to a single-side smoke exhaust temperature raising test method for controlling blockage of an air preheater, which belongs to the coal-fired power generation industry. Background technique

[0002] The air preheater is an important part of the boiler equipment in coal-fired power plants, which can effectively improve the economical efficiency of the boiler operation. However, when the air preheater is blocked, it will increase the resistance of the boiler's air and smoke system and increase the power consumption rate of the draft / induction fan. In extreme cases, it will affect the load capacity of the unit and cause equipment problems such as stalling of the induced draft fan. In recent years, thermal power units across the country have implemented ultra-low emission transformation, and large-scale coal-fired units in service have been gradually transformed and put into use. Flue gas denitrification devices, most of which use SCR ...

Examples

Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0038] Example.

[0039] Unit #3 (330MW) of a coal-fired power generation company is equipped with a subcritical natural circulation boiler produced by Shanghai Boiler Factory with the technology imported from CE Company of the United States. The model is SG1025 / 17.53-M842. It adopts a single furnace four-corner tangential combustion method, equipped with a warehouse-type steel ball mill pulverizing system, adopts five-layer burners, separates the flue baffle to adjust the reheated steam temperature, and controls the superheated steam temperature through primary and secondary water spraying, and balances ventilation. All-steel structure, semi-outdoor island layout, solid-state mechanical slag discharge, Junker type ...