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Device and method for adjusting flue-gas temperature at outlet of four-compartment air preheater

A technology of air preheater and flue gas temperature, which is applied in the field of coal-fired boilers, can solve problems such as damage, uneven temperature, and damaged life, so as to improve safety and economy, reduce the impact of equipment life, and smoke The effect of uniform air temperature distribution

Active Publication Date: 2018-08-17
NORTH CHINA ELECTRICAL POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deviation of the exhaust gas temperature at the outlet of the air preheater will affect the temperature distribution of the rear flue, and then affect the temperature distribution entering the dust collector, and the uneven temperature distribution of the dust collector will lead to uneven temperature of equipment components such as filter bags and plates The service life is damaged or damaged, seriously affecting the operation safety of the equipment

Method used

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  • Device and method for adjusting flue-gas temperature at outlet of four-compartment air preheater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0032] Such as figure 1 As shown, the present invention provides a device for adjusting the flue gas temperature at the outlet of the four-division air preheater. Channel 11 and cold air channel 12, the cold air channel 12 has a left secondary air channel 121, a primary air channel 122 and a right secondary air channel 123 arranged at intervals in sequence, and the outlet flue gas temperature of the air preheater of the four compartments is adjusted The device is installed on the flue gas duct 1, which includes:

[0033] The first temperature adjustment mechanism 2 has a first pipeline 21 and a first heater 22 connected to the first pipeline 21, and the first heater 22 communicates with the first pipeline 21 through the first pipeline 21. The left secondary air duct 121 is connected;

[0034] The second temperature adjustment mechanism 3 has a second pipeline 31 and a second heater 32 connected to the second pipeline 31, and the second heater 32 communicates with the second ...

Embodiment approach 2

[0050] Such as figure 1 As shown, the present invention also provides a method for adjusting the flue gas temperature at the outlet of the air preheater in the four compartments, which adopts the device for adjusting the flue gas temperature at the outlet of the air preheater in the quarter compartments described in Embodiment 1. The structure, working principle and beneficial effects of the device are the same as those in the first embodiment, and will not be repeated here. The method includes the following steps:

[0051] Step S1: adjusting the air volume Q1 of the first cold air passing into the left secondary air duct 121 and the air volume Q2 of the second cold air entering the right secondary air duct 123;

[0052] Step S2: According to the temperature difference between the two sides of the smoke exhaust passage 4, respectively adjust the temperature T1 of the first cold air passing into the left secondary air duct 121 and the temperature T1 of the second cold air passi...

Embodiment approach 3

[0061] Such as figure 1 As shown, the present invention also provides a method for adjusting the flue gas temperature at the outlet of the air preheater in the four compartments, which adopts the device for adjusting the flue gas temperature at the outlet of the air preheater in the quarter compartments described in Embodiment 1. The structure, working principle and beneficial effects of the device are the same as those in the first embodiment, and will not be repeated here. The method includes the following steps:

[0062] Step S3: Adjust the temperature T1 of the first cold air passing into the left secondary air passage 121 and the temperature T2 of the second cold air passing into the right secondary air passage 123, so that The temperature T1 of the first cold air in 121 is the same as the temperature T2 of the second cold air passing into the right secondary air duct 123;

[0063] Step S4: According to the temperature difference between the two sides of the smoke exhaus...

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Abstract

The invention provides a device and method for adjusting the flue-gas temperature at an outlet of a four-compartment air preheater. The four-compartment air preheater is provided with a flue-air pipeline, the flue-air pipeline is provided with a flue-gas channel and a cold air channel arranged at intervals, the cold air channel is provided with a left secondary air channel, a primary air channel and a right secondary air channel which are sequentially arranged at intervals, and the device for adjusting the flue-gas temperature at the outlet of the four-compartment air preheater is installed onthe flue-air pipeline. The device comprises a first temperature regulating mechanism, a second temperature regulating mechanism, and a smoke exhaust passage, wherein the first temperature regulatingmechanism is provided with a first pipeline and a first air heater connected to the first pipeline, and the first air heater is connected to the left secondary air channel through the first pipeline;the second temperature regulating mechanism is provided with a second pipeline and a second air heater connected to the second pipeline, and the second air heater is connected to the right secondary air channel through the second pipeline; and the smoke exhaust passage is connected to the flue-gas channel. The purpose of reducing the temperature difference between the two sides of the smoke exhaust passage by adjusting the temperature of the cold air introduced into the left secondary air channel and the right secondary air channel is achieved, the structure is simple, and the operation and the adjustment are simple and convenient.

Description

technical field [0001] The invention relates to the technical field of coal-fired boilers, in particular to a device and method for adjusting the flue gas temperature at the outlet of a quarter-chamber air preheater. Background technique [0002] With the improvement of electric power technology and the manufacturing level of auxiliary equipment, the reliability and availability of auxiliary equipment are also getting higher and higher. The unit adopts the single row arrangement of auxiliary equipment because of its small footprint, low engineering cost, convenient maintenance and high equipment efficiency, etc. Advantages become a new development trend. [0003] In recent years, our country has also begun to study and explore the single-row arrangement of auxiliary machines. At present, the number of units using single-row arrangement of auxiliary machines in my country is gradually increasing, whether it is air-cooled, water-cooled, pure condensing or heating units. The a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23L15/04F28F27/00
CPCF23L15/04F28F27/00Y02E20/34
Inventor 孙亦鹏赵振宁张清峰刘骥温志强李金晶李媛园李建军
Owner NORTH CHINA ELECTRICAL POWER RES INST
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