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Intelligent adjustable and flexible sealing system for rotary type air pre-heater

An air preheater and flexible sealing technology, which is applied in engine sealing, lighting and heating equipment, indirect carbon dioxide emission reduction, etc., can solve problems such as excessive elastic deformation and reduced sealing performance, and achieve good working conditions and maintenance The workload is small and the effect of ensuring long-term safe operation

Active Publication Date: 2013-06-12
章礼道
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the excessive amount of elastic deformation required, the flexible contact seal can only maintain good performance for 3 to 6 months, and then the sealing performance drops sharply. Therefore, the existing technology usually retains a full set of radial and axial seals when implementing contact seals. and circumferentially sealed elastic metal flap members

Method used

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  • Intelligent adjustable and flexible sealing system for rotary type air pre-heater
  • Intelligent adjustable and flexible sealing system for rotary type air pre-heater
  • Intelligent adjustable and flexible sealing system for rotary type air pre-heater

Examples

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Effect test

example 1

[0039] Combine now figure 1 , figure 2 , image 3 Taking a 600MW class supercritical power plant boiler equipped with two 3-compartment rotary air preheaters as an example to illustrate the optimal way to realize the invention.

[0040]The intelligent adjustable flexible sealing system of rotary air preheater includes adjustable flexible sealing sheet, non-adjustable fan-shaped plate, shell arc plate, sealing sheet guide groove, sealing sheet push-pull rod, push-pull rod sealing assembly, linear actuator, Digital position sensor, temperature sensor, contact acoustic wave sensor, industrial PC with I / O interface; the non-adjustable sector plate at the hot end does not touch the sealing plate on the upper part of the rotor in the cold state and leaves a gap for the axial expansion of the rotor , the linear actuator pulls the adjustable flexible sealing sheet back into the guide groove of the sealing sheet through the sealing sheet push-pull rod, and the industrial PC with I / O...

example 2

[0051] Combine now figure 1 , image 3 A SCR denitrification device was added to a 600MW class supercritical power plant boiler A. It was equipped with 2 sets of 3-chamber rotary denitrification air preheaters. After half a year of operation, the ash was seriously blocked. The side heat cleaning technology and the adaptive transformation of two 3-segment denitrification air preheaters are taken as an example to illustrate the optimal way to realize the invention.

[0052] The intelligent adjustable flexible sealing system of the rotary air preheater includes an adjustable flexible sealing sheet, an arc plate of the shell, a sealing sheet guide groove, a sealing sheet push-pull rod, a push-pull rod sealing assembly, a linear actuator, a digital position sensor, Temperature sensor, contact acoustic wave sensor, industrial PC with I / O interface; the arc-shaped plate of the shell is reserved in the cold state with the gap required for the mushroom-shaped deformation of the rotor ...

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Abstract

The invention relates to an intelligent adjustable and flexible sealing system for a rotary type air pre-heater used in a large and medium-sized thermal power generating unit. The sealing system comprises an adjustable and flexible sealing piece, a nonadjustable sector plate, a casing curved plate, a sealing piece guide groove, a sealing piece push-pull rod, a push-pull rod sealing component, a straight stroke actuating mechanism, a digital position sensor, a temperature sensor, a contact-type sonic sensor and an industrial PC (personal computer) provided with an I / O (input / output) connector. The quality of the adjustable and flexible sealing piece accounts for 1% or less of that of the nonadjustable sector plate, the controllability is good, and the actuating mechanism is light in weight, intelligent and low in energy consumption; the application is expanded to cold side radial sealing and axial sealing, the air leakage rate of the rotary type air pre-heater under various working conditions can be reduced remarkably, and the station service power consumption rate is decreased remarkably; non-contact operation is adopted, so that the overhaul period of the intelligent adjustable and flexible sealing system can be adapted to an overhaul period of a large boiler body; and the sealing system can be easily adapted to special deformation patterns of rotors in the air pre-heater for thermal ash removing on each side, and the serious ash fouling problem of a denitration air pre-heater is solved.

Description

(1) Technical field: [0001] The invention relates to an intelligent adjustable flexible sealing system for a rotary air preheater used in large and medium-sized power plant boilers. (two) background technology: [0002] The rotary air preheater is an important part of the power plant boiler. It uses the heat of the flue gas at the outlet of the power plant economizer to heat the primary air and secondary air required for the combustion of the power plant boiler. The rotor in the rotary air preheater The heat transfer element passes through the smoke flow channel and the primary air and secondary air flow channels successively in a rotating manner, is heated in the smoke flow channel, and releases heat in the primary air and secondary air flow channels. The part that separates the flue gas flow channel from the primary air and secondary air flow channels is called a fan-shaped sealing plate, or fan-shaped plate for short. The three-chamber rotary air preheater has three fan-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/16F23L15/00
CPCY02E20/34
Inventor 章礼道
Owner 章礼道
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