how to choose steam boiler for sugar factory in Nukus

how to choose steam boiler for sugar factory in Nukus

Ultra-low-load operation harm to oil-fired boiler for the oil-fired boiler engaged in related to people may often hear the ultra-low-load operation, what is the ultra-low-load operation? Ultra-low-load operation What are the disadvantages for the boiler? For oil-fired boilers is 60% to 100% of rated load. Ultra-low-load operation is deemed to run below this range. But while a hazardous phenomenon ultra-low-load operation of the boiler will be mainly are: (1) the reliability of the boiler water circulation drop of fuel gas circulation usually natural circulation. Ultra-low-load operation, because a small amount of fuel into the boiler, the temperature drop across the furnace, the heated water wall weakening, boiler water circulation flow rate will be reduced, reliability is lowered circulation. (2) it is difficult to ensure the quality of the how to choose steam boiler for sugar factory in nukus load decreases as the fuel, the temperature and humidity of the steam will be affected, in particular for a boiler with a superheater, when the boiler load decreases, the outlet steam temperature corresponding decline difficult to maintain rated steam temperature, steam quality deterioration. When the superheated steam temperature drops below nominal, soda heating surface system conditions will enter the danger zone, when the load is technically called the minimum allowable load. (Three) tail heating surface of the boiler, air preheater, such as acid etching, and a tail economizer heating surface of the hot water boiler generally increased in line with the normal boiler heating surface design and exhaust gas temperature, exhaust gas temperature is usually high dew point temperature. Ultra-low-load operation, the furnace temperature was decreased to varying degrees departments, the final exhaust gas temperature will be reduced. Low Temperature easy to make a metal wall temperature below the dew point of sulfuric acid vapor, sulfuric acid vapor condensation heating surface will be at a low temperature, resulting in low corrosion of heating surfaces. Thus, in the operation and management of the boiler, the boiler should try to avoid the occurrence of ultra-low-load operation. Ultra-low-load operation harm to oil-fired boiler is too big, so we have to load the main boiler of time not less than the rated load in their daily operations.

Before the hot water boiler operation to check whether important and what content? Hot water boiler in the boiler, it can be said that common and commonly used. However, in its specific knowledge of learning and understanding, the extent is not comprehensive enough and sufficient, there are many deficiencies and gaps in. That being the case, other important products, that the following will continue to carry out this work, so that we achieve the learning objectives and requirements as soon as possible, not regret. Hot water boiler, which is in check before running, can be said to be very important and critical, as it will affect the boiler can safely use, as well as to avoid danger or accident. So, it is not carried out sloppy in the details, there is: (1) internal inspection of hot water boilers, as well as its work on the preparation of the examination, if well prepared and full of. (2) Check the inside of the boiler furnace and flue, whether there is fouling or debris, if any, should be promptly removed. To adjust the door and the flue duct, it is mainly to see if complete and close the shutter, and the switch is flexible. (3) For boiler accessories, but also to be checked, which is in good condition, it can be used normally. In addition, in the instrumentation and control devices, will depend on whether a complete and clean. (4) for the hot water boiler automatic control system, as well as ancillary equipment and combustion equipment, it is to conduct a comprehensive inspection, if there are problems. And its mechanical drive system, is normal. (5) of the boiler heating surface, should be carefully examined, because it is important, related to the heat transfer efficiency of the boiler. Further, it is noted that, in the low temperature hot water boiler, which is achieved by the system pressure constant expansion tank, and the tank is typically mounted on the circulating system. In the high temperature hot water heating system, typically using nitrogen pressure tank, and to achieve a constant pressure. After checking all the hot water boiler qualified, you can shield installation, commissioning further work. At the same time, pay attention to the current no abnormality or problem.

When gas boiler Sheung Shui, six rules to follow: 1, substandard quality boiler feed water can not enter. 2, boiler water filling should be carried out when the ambient temperature exceeds 5 ℃, otherwise freezing measures need to be taken. 3, if the boiler body changes after the first start, before and after the Sheung Shui, the designated persons must record the value of each indicator indicates expansion, and expansion analyze whether conditions in a normal state. 4, need to have someone to monitor the discharge air collector box Sheung Shui, the separator discharge air inlet duct, the air economizer door, the door when the air in time continuous take off water to prevent water running phenomenon. 5, the system should be checked Sheung process piping, valves, whether there is a leak phenomenon; if there is, then stop Sheung observed changes in the water level in the storage tank system is determined tightness. If you find a leak or the water level drops, should stop Sheung Shui, and look for reasons to eliminate contact.

Winter heating season is approaching, Jinan City, Shandong Province in response to the country clean, low-emission environmental requirements, increase efforts to support the promotion of winter heating clean, clean heating to further enhance the city level, issued on the issue clean winter heating engineering and operational capital subsidy Notice.

Second, the use of centralized gas boiler user, uniform implementation of preferential gas prices 1.71 yuan / cubic meter, the heating period and after the end of the third-party audit of gas consumption, gas will be the final settlement price (not exceeding Municipality department approved between the reference price) and 1.71 yuan / cubic meter price difference subsidy to the gas company, to purchase heating companies use non-city franchise gas pipeline business gas heating can be direct subsidies to heating companies.

Third, the use of electricity users centralized heating, heating period and by the end of the third-party audit by the electricity, the power company will operate the unit with the settlement price and preferential rates (level of 0.5 yuan / kwh, Valley Electric 0.25 yuan / kilowatt the difference between the time) subsidy to operate the unit.

Fourth, the use of formula household heating boiler user, purchase subsidy subsidy to the user equipment or units in accordance with Standard 2000 underwritten yuan / household. Temporarily performed using the sub-family user heating boiler gas prices during the step, performed in accordance with a first gear price urban gas prices; after the heating period, gas operation subsidies subsidies to users according to standard 1200 / household .

Fifth, the use of household electric heating type user, can also get subsidies. Subsidy ranges: The air source heat pumps, domestic electric boilers, heating cables, heating the carbon crystal plate user. According to the notification, the device according to the purchase subsidy subsidized purchase truly carbon crystal plate does not exceed 2,000 yuan / household air-source heat pump, domestic electric boilers, heating cables subsidy standard is 2000 Yuan / or household user to Advancer units. After the heating period, power to the user according to operating subsidies subsidies 1200 / standard household.

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