autoclave bagasse hot water boiler

Reheater is essentially a low-pressure steam has done work again heated and reaches a certain temperature steam superheater, reheater effect of further improving the thermal efficiency of the cycle plant, the steam temperature control and last stage steam turbine blades within the allowable range. The steam superheater from the steam turbine in the boiler is heated up to a superheated steam heater. The main effect of heat and then there are two, one is to reduce the humidity of water vapor, help to protect the turbine blade; the second is restrained to increase the relative rate and absolute turbine internal efficiency. Heated again by the high pressure exhaust cylinder is returned to the boiler steam turbine, and then to the low pressure cylinder expansion work. Purpose is to make the steam turbine last stage blades and humidity controlled within the allowable range. Reheat steam pressure of 20% superheated steam pressure. More than 125MW Unit in China have adopted the single reheat system.

Shutdown operating steam boiler steam boiler shutdown is divided into two kinds, the temporary shutdown (within three days), complete shutdown (shutdown or overhaul more than three days). A steam boiler temporary shutdown: 1, according to the actual situation, the appropriate weakened combustion, stopping the steam, followed close blower, Fan, grate steam sector. 2, until the furnace temperature dropped to fire when the pressure starts 400 ℃, covering the layer of wet combustion of coal seam, close the damper, coal down the shutter, open the exhaust valve exhaust. 3, the boiler water level to be adjusted to a vapor pressure drop 0.15MPa when the maximum operating level, closing the main valve until the furnace temperature dropped off when the main power 200 ℃. 4, run the table in the line of steam boilers make a record, do the work of changing of the guard. 5, steam boiler pressure during the fire need to have someone on duty to prevent coal combustion and boiler water and other accidents. Second, the complete shutdown steam boiler: 1, the steam boiler is stopped an hour earlier coal supply steam, the steam to be sequentially turned off after stopping blower, Fan, grate. The excess coal in the coal hopper picking out, open grate, coal and slag in the furnace cleaned up. 2, adjust the boiler steam boiler water level to the maximum working level if the shutdown to one week, open the exhaust valve, the pressure to be reduced to 015MPa, the main steam valve closed. 3, steam boilers quickly opened if the maintenance or long-term shutdown, the pressure drop 0.4Mpa all drain valve, drain the boiler water, dried using waste heat boiler and do respond to treatment. (Note: You must turn off the furnace temperature drops after about 200 ℃ can turn on the water). 4, turn off the main power shutdown, make relevant records on the operation table boiler.

Thirteen Five release plan indicates that China's move towards green development pace firmer, Beijing SASAC Building Materials Service Center from its start, the use of green boiler heating for low nitrogen as the primary task before the onset of winter. SAC Building Materials authorities after preliminary investigation and after the screening, the other fast boiler R & D experience in the field of boiler cleaning two decades expressed appreciation can, in August 2017 signed a five Thalia T6 series one boiler and two vacuum with fast Boiler condensing gas boiler products contract.

Third, the "soot blowing" effect on the safe operation of the boiler

To the sootblowing gas boiler may cause a negative pressure boilers, steam temperature, steam pressure, load fluctuations of the water level, but not the same impact soot-blowing of the boiler bring different heating surface, in response to these process sootblowing parameters strengthen View. On the impact of boiler soot blowing, in the following areas:

1, sootblowing have been affected for the stability of combustion, soot blowing in the process should strengthen the monitoring of combustion.

2, at low load operation and combustion instability, can not work sootblowing; simultaneously, so that the heating surface cleaning sootblowing, increased heat absorption, thus making the exhaust gas temperature is lowered.

3, since the sootblowing furnace pressure fluctuations result, a large negative pressure should be maintained in the furnace to prevent soot blowing to take pressure.