PLC control diesel fired steam boiler

When operating the boiler, what is the "waters"? When the boiler water gauge did not see the water level, wash first with water table method to determine water or with water. If it is determined that water, water level meter for even the highest fire tube boiler is lower than the boundary, emergency shutdown immediately, reducing the furnace temperature, the main steam valve and to close the valve. For larger capacity of water, and the water boiler higher than even the highest fire tube boiler industry, can be "called water" method to determine the severity of water shortages, in order to take appropriate measures. When the "waters" to determine water shortage is not serious, it can continue to the boiler feed water, the water level returned to normal, gradually warming up to start burning equipment, boost operational. Through the "waters", sentenced to severe water shortages, have emergency shutdown, non-blind feed water to the boiler. Never allow chances attempt to cover liability resulting boiler water shortage and water supply blind. This wrong approach often lead to disaster, expansion of the accident, causing the boiler furnace explosion and crash. The method of "waters" are: (1) turn on the water tap open water table. (2) stripping off cock. (3) close the water cock. (4) and then turn on the water tap is closed. (5) and then turn the tap water, to see whether there is water out from the water pipe is connected. If out of the water, the water is slightly; if no water appears, proved to be a serious shortage. "Waters" process can be repeated several times but not delay too long, so the expansion of the accident. "Waters" principles of operation are: After draining cock open, then close the steam, the water pipe connected between the water cock and the table, so that a large vapor communication with the water table, water gauge pressure is zero. Then again closed drain cocks open water pipe connected between the water cock and the water table, because the pressure within the drum water level higher than the inner pressure table, if the drum water level is in the vicinity of the water pipe connected to the water vapor stream is brought into water table, which shows the extent of water shortage is not serious. If the "waters" has never been in the water table level, water is considered more serious.

Vertical plc control diesel fired steam boiler will affect a large fan vibration running long vertical steam boiler fan speed operation, large mechanical wear and vibration, especially at low load unit, fan baffle throttle more, fans work in the unstable region, easily cause fan vibration. In addition, low vertical coal-fired steam boiler induced fan system automation level, can not adjust, low operating efficiency, fan vibration is relatively strong, not only equipment maintenance costs, but also poses a potential threat to the safe operation of the unit. Vertical steam boiler can be considered, Fan Vertical coal-fired steam boilers high pressure transducer, induced draft fan boiler using frequency control. To do the following: First, each exhaust fan arranged a high-voltage inverter. The inverter is connected to the high speed winding machine. Low speed winding of the motor coupled to the low-speed circuit breaker for the bypass operation when the inverter failure. Then, between the drive motor and additional disconnecting switch cabinet, electrically connected to the low-speed circuit breaker. High motor speeds, the door closing isolation knife, the low-speed circuit breaker closing prohibition. Motor bypass operation, the isolation switch off, the low-speed low speed motor control circuit breaker. Output frequency of the inverter is controlled by the speed control signal in accordance with the negative pressure 4-20mA vertical coal-fired steam boiler furnace start and stop the inverter output control signal by DCS.

Subsequently, the delegation visited the company's boiler cleaning laboratory, technicians demonstrated to the delegation of the company's latest product boiler operation, and use of DCS control system in the laboratory trace data. Mr. Liu to our boiler products to achieve nitrogen oxide (referred to as NOx) emissions below 18 mg or less, is widely used in Beijing APEC venue, the Central Authority and other countries prefix institutions and other international occasions expressed a high degree of praise and encourage.

More than half of CFB boilers in the world, in both number and in capacity are in China. CFB technology owns an irreplaceable position in the market of steam and co-generation, and enters the power generation market recently. Fluidized Bed Combustion Nowadays, the total number of FBC boilers put into operation in China is about 4000, and about 3,000 of them are CFB ones. The largest capacity of CFB boilers is 300MWe and was put in operation in 2008. By the end of May 2010, there are 32 300MWe CFB units in operation and about other 50 units are under construction or will be under construction soon.

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