Method for smoke discharge, condensation and dust removal of supercharged oxygen-enriched coal-fired boiler
A coal-fired boiler and oxygen-enriched technology, applied in the field of boilers, to achieve the effects of simple and reliable equipment, improved economy, and low energy consumption
Inactive Publication Date: 2013-03-20
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
The traditional tube-and-tube smoke exhaust condenser, in the process of recovering the condensation heat of the flue gas moisture in the pressurized oxygen-enriched coal-fired boiler, cannot avoid ash blocking and corrosion between the tubes, which brings great confusion to the industry
Method used
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[0016] The present invention provides a method for condensing and dust-removing smoke from a pressurized oxygen-enriched coal-fired boiler used in a pressurized oxygen-enriched combustion power generation system. The present invention will be further described below in conjunction with the accompanying drawings.
[0017] like figure 1 As shown, the method is realized by a high-pressure water-cooled cyclone dust removal condensing device 1, the upper part of the high-pressure water-cooled cyclone dust removal condensing device is a cylindrical chamber, and the lower part is a conical chamber, and an ash discharge cylinder 10 is arranged at the bottom of the conical chamber. , The ash discharge is controlled by the ash discharge valve 9. The top of the device is provided with a horizontal air inlet pipe 2 and a vertical air outlet pipe 3 . The working pressure of the device is 6.0-8.0Mpa, and the device is respectively equipped with a pressure layer 5, an insulation layer 6, a ...
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The invention relates to a method for smoke discharge, condensation and dust removal of a supercharged oxygen-enriched coal-fired boiler. The method comprises the following steps of: introducing smoke into a high-pressure water cooling cyclone dust removal and condensation device; exchanging heat between the smoke and a water cooling wall in the device and condensing; dumping dust and liquid drop in the smoke to an inner wall of the water cooling wall; downwards flowing a liquid film formed by condensation under the action of gravity and washing the dust on an inner wall surface; condensing sulfuric acid steam in the smoke and flowing the sulfuric acid steam to the bottom part of a conical chamber arranged on the lower part of the device; discharging the treated smoke through an air outlet pipe; discharging ash gathered on the bottom part of the device through an ash discharging valve; discharging acid liquid to an acid liquid treatment and recovery device for separation of dilute sulphuric acid; sending separated water to a spraying pipe of the dust removal and condensation device; blowing the ash from the dust removal and condensation device; sending cooling water subjected to heat exchange to a water feeding heating system of the boiler. The method is characterized in that: equipment is simple and reliable, energy consumption is low, a CO2 collection process is simplified, and a good effect of smoke dehydration and dust removal can be achieved.
Description
technical field [0001] The invention relates to a boiler flue gas condensation and dust removal method, in particular to recovery of sensible heat and water condensation heat in the low-temperature flue gas of a pressurized oxygen-enriched coal-fired boiler, removal of water and dust, avoiding ash accumulation, and recovery of dilute sulfuric acid solution The invention relates to a method for self-sufficient water soot blowing function, and belongs to the technical field of boilers. Background technique [0002] to capture CO 2 The purpose of the pressurized oxygen-enriched combustion integrated power generation system, so that the boiler combustion and CO capture 2 The whole process is completed under the pressure of about 6.0-8.0MPa. Under this high pressure, the condensation temperature of the water in the exhaust gas of the boiler increases to about 200°C, so the condensation heat of the water that could not be used can be recovered to heat the condensate water of...
Claims
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IPC IPC(8): F23J15/04F23J15/06F23J3/00
CPCY02E20/30Y02E20/34
Inventor 阎维平马凯高正阳鲁晓宇董静兰孙俊威
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)