The basic working principle of the boiler: the burner fully burns the gas, and the heat is transferred to the intermediate medium-water in the shell of the boiler through radiation and convection conduction. The water is heated to produce steam to meet user needs.
Basic principles of safety monitoring:
1. Automatic burner safety control (take gas burner as an example): the combustion program is automatically shut down by a reliable programmable controller, and it is tested step by step, and the next step can only be run after passing the test. Start the burner, and then conduct the blast test-purging possible residual gas, gas pressure detection, flame monitoring. If any of the above links fail the test, the burner will immediately stop and alarm.
2. System safety control: a pressure controller is installed on the pot shell. Pressure control: When the boiler steam pressure reaches the low-pressure automatic combustion point, the boiler burner should be automatically turned on; the boiler water supply temperature is lower than the startup fire valve should be able to automatically start; when the boiler steam pressure reaches the high pressure shutdown point, the boiler burner should be automatically shut down; When the steam pressure reaches the differential pressure point, the boiler burner should be shut down immediately, and sound and light alarm, and must be manually reset to restart.
3. Water level control: when the boiler water level is low, the feed water pump automatically replenishes water; when the boiler water level reaches the normal water level, the water pump stops supplying water; when the boiler water level reaches the high water level, the boiler burner and water pump should stop immediately, and the sound and light alarm, manual It can be restarted only after resetting.
4. System protection: The boiler is equipped with pressure controller and water level controller. Overpressure protection: When the boiler pressure exceeds the set pressure, the boiler will automatically stop the furnace and sound and light alarm, it must be manually reset to restart. Low water level protection: when the boiler water level is lower than the set value, the boiler automatically shuts down the furnace and sound and light alarm, must be manually reset to restart.
5. Smoke temperature control: with display function of smoke exhaust temperature, and can realize smoke exhaust over temperature alarm.
The front and back of the boiler smoke box adopts bolt connection structure, and the sealing is good. The rear smoke box of the boiler is designed with a condensed water discharge pipe to drain the condensed water in time to prevent the rear door cover from soaking and causing corrosion of the rear door cover. The blower device at the fire whole device of the front door cover effectively reduces the temperature of the fire whole device to prevent the door cover around the fire whole device from being burnt out and to avoid scalding the furnace personnel. The rear door cover of the boiler is provided with a cleaning hole, which can be easily cleaned. The insulation materials of the front and rear smoke boxes and door covers of the boiler are made of high-temperature resistant aluminum silicate fiber products, and the use temperature can reach 1400 ° C, which effectively prevents the front and rear doors from being burnt out, thereby extending the service life of the boiler.