The main factors restricting shutdown cooling rate, after the shutdown drum may not cause excessive thermal stress. Steam oven with steam and heated water to the drum contrast, after shutdown due to an external insulation with a drum, the drum wall temperature drop is slower than the saturation temperature decrease rate of the steam and boiler water, is boosted and the upper portion of the ignition the lower portion of the boiler water cooling drum wall. Due to the large drum boiler water wall heat transfer coefficient, the lower half of the drum wall temperature decreased rapidly, while the saturated steam into superheated steam heating in the upper half of the drum. Superheated steam only a very small thermal conductivity, but also because he and the steam temperature is higher than the temperature, density, and natural convection can not be saturated steam is smaller than the saturated vapor. Therefore, the heat transfer coefficient on the wall of the steam drum is small, the temperature of the upper half of the drum decreases slowly. On the drum, the lower half of bananas due to temperature difference occurs upwardly formed deformation thermal stress.
How do you know your boiler air preheater leakage is not it? Since the low-temperature air preheater of boiler corrosion and abrasion, easy preheater tube is perforated so that air leakage into the flue gas. In addition to visual inspection of the preheater after shutdown, the boiler can also be found at runtime preheater leakage. Preheater Air Leakage phenomenon are: (1) the excess air ratio than the normal standard preheater. (2) increase the current blower, reduced pressure preheater inlet and outlet. (3) the current induced draft fan increases because of the increased load induced draft fan. (4) severe air leakage, blower inlet damper fully open, the air flow is still insufficient, less than the rated boiler load. (5) a large number of cool air leakage into the flue gas, so that the exhaust gas temperature drops.
Battle blue horn sounded, emissions of sulfur, nitrogen and oxygen compounds gradually strict national requirements. To improve the quality of the environment, but also the people a blue sky, in all industries around the environmentally friendly product revolution, Hainan Sinochem Pharmaceutical companies are no exception. By the company investigation and comparison of boiler products, in March 2017 signed a six-ton steam-cleaning integrated condensing gas boiler and steam fast boiler. Tested and post feedback, the boiler equipment installation qualification, operating normally, and successfully passed the inspection by local quality inspection departments of the boiler.
What are the main parts of the boiler? No matter what kind of equipment, accessories are essential, and parts of the boiler is very much, even the smallest one ton tonnage industrial gas boiler, but also by the composition system accessories, not to mention the large circulating fluidized bed the number of parts of the boiler. Zheng pot boiler accessories is one of the main marketing services provided, as even wear tiny boiler, but also need to replace individual parts within a certain period of time, to ensure safe and stable operation of the boiler.
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