Boiler Waste Heat Recovery System
A recovery system and boiler waste heat technology, applied in the field of boiler waste heat recovery, can solve the problems of furnace design deviation and high boiler exhaust gas temperature
Active Publication Date: 2016-04-06
GUODIAN LONGYUAN ENERGY SAVING TECH +1
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Problems solved by technology
[0008] The purpose of the present invention is to provide a boiler waste heat recovery system to solve the problem of excessively high boiler exhaust gas temperature due to the design deviation of the furnace or the difference between the designed coal type and the actual combustion coal type
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[0016] The present invention will be further described in detail below with reference to the drawings and specific embodiments.
[0017] Such as figure 1 As shown, the preferred embodiment of the present invention mainly includes a tail flue 1, a boiler economizer 2, an air preheater 3, an energy-saving optimized economizer 4, a bypass 5, a flue gas baffle 6, and the like. The boiler economizer 2 includes a feedwater inlet header 21, and the energy-saving optimized economizer 4 includes a tube bundle (not shown), a feedwater inlet header 41, and a feedwater outlet header 42.
[0018] Specifically, the tail flue 1 is connected between the boiler economizer 2 and the air preheater 3. The flue gas 10 indicated by the arrow is in the tail flue 1, and part of it enters the energy-saving optimized economizer from the boiler economizer 2 4. The energy-saving optimization economizer 4 enters the air preheater 3, and the other part directly enters the air preheater 3 from the boiler econom...
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The invention provides a boiler afterheat recovery system. The boiler afterheat recovery system comprises a boiler economizer, an air preheater and a tail flue connected between the boiler economizer and the air preheater, wherein the boiler economizer comprises a water supply inlet header; the boiler afterheat recovery system also comprises an energy-saving optimized economizer, wherein the energy-saving optimized economizer comprises a pipe bundle, and a water supply inlet header and a water supply outlet header arranged at the two ends of the pipe bundle; a by-pass is arranged on the tail flue; the energy-saving optimized economizer is fixed in the by-pass; the water supply outlet header of the energy-saving optimized economizer is connected with the water supply inlet header of the boiler economizer. According to the boiler afterheat recovery system, the temperature of exhaust gas of a boiler can be reduced; the cyclic thermal efficiency of a power station is improved; the boiler afterheat recovery system still has high reliability and economical efficiency when the working condition of the boiler changes greatly.
Description
Technical field [0001] The invention relates to the technical field of boiler waste heat recovery, in particular to a boiler waste heat recovery system added with an energy-saving optimized economizer. Background technique [0002] In the field of boiler waste heat recovery, the economizer is a device that uses the heat of the flue gas at the tail of the boiler to heat the feed water. There are two main functions: [0003] 1. Lower the exhaust gas temperature, improve thermal efficiency and save fuel. [0004] 2. Increase the feed water temperature, reduce the thermal stress of the boiler tube wall caused by the temperature difference, and extend the service life of the boiler tube. [0005] The air preheater uses the heat of the flue gas in the tail flue to preheat the air to a certain temperature before entering the boiler. The air preheater can reduce the heat loss of exhaust gas, improve the stability of pulverized coal combustion in the boiler and the carbon burning rate of pul...
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IPC IPC(8): F22D1/38
Inventor 丁兆勇赵虎军王明仁郭冰姜媛媛王文波滕东玉
Owner GUODIAN LONGYUAN ENERGY SAVING TECH