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System and method for preventing rotary air preheater from being blocked by ammonium bisulfate ash deposition

A technology of air preheater and ammonium bisulfate, which is applied in the direction of combustion method, damage protection, heat exchange equipment, etc., can solve the problems such as the effect of smoke temperature is not obvious, so as to prevent the clogging of ammonium bisulfate ash accumulation, improve safety and Economic efficiency and the effect of improving control accuracy

Pending Publication Date: 2021-04-27
XIAN THERMAL POWER RES INST CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, the normal operating speed of the air preheater is generally 0.75 ~ 0.9 rpm, which is already low. If the speed is further reduced, the effect of increasing the smoke temperature will not be obvious

Method used

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  • System and method for preventing rotary air preheater from being blocked by ammonium bisulfate ash deposition
  • System and method for preventing rotary air preheater from being blocked by ammonium bisulfate ash deposition

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Embodiment Construction

[0023]The present invention is given below, and it is to be not limited to the following specific embodiments, and the equivalent transformations made by the present application technical scheme fall into the scope of the present invention.

[0024]Compliance with the above technical solution, such asfigure 1 withfigure 2As shown, the present embodiment gives a system and method for preventing ambulatory ash blur of hydrogen sulfate in turn-type air preheater.

[0025]Seefigure 1 According to a system of preventing ambulatomy ambulfate, ambulatomy, an ammonium sulfate, including a smoke measuring device 7, a flue gas boost fan 9, and a flue gas heater 10; the smoke temperature measuring device 7 is mounted in air Preheater flue gas side exit, used to measure the exit flue gas temperature during the operation of the air preheater; the flue gas boost fan 9 is connected to the bypass flue gas baffle door 8, bypass flue gas baffle door 8 and SCR The exit flue is connected, and the bypass flue...

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Abstract

The invention discloses a system and method for preventing a rotary air preheater from being blocked by ammonium bisulfate ash deposition. The system comprises a flue gas heater and a flue gas booster fan, wherein an inlet of the flue gas booster fan is connected with an SCR outlet flue, and an outlet of the flue gas booster fan is connected with the flue gas heater; an oil burner is arranged in the flue gas heater, an outlet of the flue gas heater is connected with a flue gas flow equalizing device, and the flue gas flow equalizing device is arranged at an inlet or a cold end of the air preheater. The flue gas heater is adopted, and part of extracted flue gas can be rapidly heated. An oil burner is adopted in the flue gas heater and is combined with an inlet fuel oil regulating valve, so that outlet flue gas temperature control precision of the air preheater can be further improved, and the situation that equipment is damaged by exceeding the allowable upper limit is prevented. The system for preventing the rotary air preheater from being blocked by the ammonium bisulfate ash deposition is simple and reasonable, and is easy to implement; the situation that the air preheater is blocked by the ammonium bisulfate ash deposition can be prevented, so that safety and economical efficiency of a power plant unit can be improved.

Description

Technical field[0001]The present invention belongs to the field of fire power generation, and more particularly to a system and method for preventing ambulatomy ambulfate ash blur of olficate in turn-type air.Background technique[0002]In order to reduce the emission of flue gas pollutants in coal-fired fire power plants, the selective catalytic reduction method denitrite (SCR) is widely used in the removal of NOx in the flue gas, and has achieved significant results. Since coal-fired power plans usually contain a certain amount of sulfur (S) element, sulfur is mainly converted to SO during the boiler furnace combustion2At the same time, about 1% ~ 2% SO2Will be further oxidized to SO3When the SCR is in the process of processing the flue gas, there are 0.5% to 2% SO2Will be catalyzed by SCR catalyst to SO3. The above reaction process makes the SCR outlet flue gas will not be avoided with a certain amount of SO3. These generated SO3Ammonium hydrogen sulfate (ABS) will be formed to Scr...

Claims

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Application Information

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IPC IPC(8): F23L15/00F23J3/02F23J15/08F28F19/00F28F27/00
CPCF23J3/02F23J15/08F23L15/00F28F19/00F28F27/00Y02E20/34
Inventor 张良平张宇博沈植杨辉刘超党黎军张海龙付龙龙
Owner XIAN THERMAL POWER RES INST CO LTD
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