coatings and aotomotive industry use boiler

Therefore, CFB combustion technology has been rapidly developing in China since about 1980. By 2010, the capacity of CFB-based power was around 15% of China’s total coal-fired power coatings and aotomotive industry use boiler capacity.At that time, the largest capacity of a single CFB boiler was 300 MWe—this plant was accomplished only with subcritical steam parameters.

Minimum air amount and the relationship between the excess air coefficient in the dew point of the flue gas for complete combustion of the fuel required under ideal conditions, said theoretical combustion air amount, the fuel for complete combustion in the actual conditions of incomplete combustion, or the actual amount of air required amount of combustion air . Excess air coefficient = actual combustion air amount / theoretical combustion air amount. Dew point (Dewpoint), also known as the dew point temperature (Dewpointtemperature), in meteorology fixing means under pressure, gaseous water contained in the air is condensed into liquid water saturation dropped to desired temperature. At this temperature, condensed water mist floating in the air is called, while the stick is called on a solid surface exposed, hence the name dew point. Excess air and flue gas dew point relationship when there is insufficient combustion air ratio of the fuel is not sufficiently low combustion efficiency, coatings and aotomotive industry use boiler efficiency is also reduced. When the excess air, the flue gas water vapor partial pressure decreases, the dew point temperature is low, it can not lead to condensation, latent heat can not be released, and the excess air factor will take a lot of heat, so that the boiler efficiency decreases. Therefore, when an excess air ratio of 1.2 to 1.3, to achieve complete combustion in the excess air coefficient is very small, almost chemically incomplete combustion phenomenon. When the air excess factor is 1.2-1.3, both to ensure that the dew point will not be too low (the condensation effect is very significant), but will not take away the excess air ratio in the flue gas waste heat large, which can greatly enhance the thermal efficiency of the boiler .

Equipment maintenance method of a condensing gas coatings and aotomotive industry use boiler, pressure maintenance 1. After condensing gas boiler shutdown the furnace all the water exhausted, the scale furnace, slag clean, rejoin qualified demineralized water. 2. Regular small flame, or periodically using water vapor adjacent to the boiler furnace, the furnace so that the water temperature in the summer condensing gas boiler should be maintained at about ambient temperature of + 10 ℃, winter should ensure that water does not freeze the furnace, close all vent valve, drain valve and drain valve, to prevent leakage. 3. Boiler feed water periodically to maintain the internal pressure of the condensing gas boiler 0.05MPa ~ 0.1MPa prevent air from entering the drum. Second, wet maintenance 1. After condensing gas boiler shutdown at the stipulated time exhausted furnace water, scale, slag, ash cleaned. 2. Close all manholes, hand holes, valves, etc., and the boiler is completely isolated. 3. Prepare a basic protection solution passing demineralized water, boiler water was added per ton of sodium hydroxide Na (OH) 8kg ~ 10kg, plus or sodium carbonate (NaC03) 20kg, plus or sodium (Na2P03) 20kg. 4. The formulated with special pump maintenance alkaline solution into the boiler. 5. When all of the resist solution is injected, the valve opened to fill the qualified demineralized water boiler, until the water overflows from the air valve, and then closing the air valve and the supply valve to open a dedicated pump cycle, a uniform mixed solution. 6. Throughout the maintenance should be periodically maintained with Weihuo drying oven outer heating surface, periodically turn the pump cycle, the concentration of the solution was consistent throughout, but also regularly take the solution assay and the replenishment solution, the PH value of the solution was ~ 10 between 12 to ensure that the alkalinity boiler water. 7. frost winter to take appropriate measures. Third, the dry gas condensing boiler maintenance 1. After shutdown, the boiler water exhausted, scale remove soot, slag and furnace heating surface. 2. Close condensing gas boiler water supply, water supply, the valve on the outfall, or blocked by the separator Yan, completely isolated from the other operation of the boiler. 3. Open the manhole, hand hole, the boiler dry naturally, if the boiler wet, with Weihuo the boiler and furnace wall flue drying. 4. The selection of an appropriate amount of desiccant. Common desiccant anhydrous calcium chloride (of CaCl2) and quicklime (CaO2), CaCl2 2kg per cubic meter of volume of water placed quantitative, requires selection of particles of about 15mm; lime 3kg per cubic meter of the volume of water placed quantitative, requires selection of 10mm ~ 30mm lumps. 5. condensing gas boiler drying, the tray containing a desiccant and the release drum furnace in order to absorb moisture, not in direct contact with the desiccant required boiler heating surface. 6. The desiccant should be checked regularly once placed, heating surface for corrosion to see, the desiccant is failed condensing gas boiler month per week, once a month later examination every two weeks.

Our hospital requirements for environmental protection, health and safety in these areas is very high, for a wide variety of market coatings and aotomotive industry use boiler is also very headache and confusion, there fast boiler solve the above problem, the boiler set clean environment to provide for our hospitals and efficient operation in one, coincides with the philosophy of our hospital. --customer feedback

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