1, the calculated blowdown rate: an index showing a blowdown blowdown rate, i.e., blowdown water blowdown rate (Q sewage) percentage of the amount of evaporation boiler (Q vapor) is. Expressed as follows: K = Q sewage / Q vapor × 100%. When the amount of the boiler water stable, balanced relationship according to the amount found that a substance with the water supply into the furnace equivalent amount drained waste water with an amount of saturated steam and entrained. The (Q dirt + Q vapor) × S a = Q vapor × S vapor + Q sewage × S sewage where S a, S vapor, S sewage represent the feed water, saturated steam, the content of a substance in the sewage water, in the formula S the value by the salt content, can also be a component of the content (e.g., alkalinity, chloride ion) is calculated. Sewage is K = Q / Q vapor = (S a -S vapor) / (S -S sewage to) × 100%.
2, blowdown rate is calculated to be noted that the following three points: (1) can be calculated blowdown rate alkalinity or chloride ions (chlorine ions and salinity have relatively fixed proportional relationship, usually replaced by chloride ion salinity) were calculated blowdown rate, whichever is greater final values as blowdown rate, general heating boiler blowdown rate should be controlled below 10%. (2) for a large capacity boiler, because of its good effect of water separation apparatus, the humidity vapor is minimal. Such salt content is much lower than the saturated steam to water salinity, so in this boiler blowdown rate is calculated in both the salt content of the steam can be ignored, i.e., to K = S / (S sewage -S a) × 100% (3) for most industrial boilers, especially small volume of the drum, water separation device is simple, a large amount of water with saturated steam in industrial boilers, steam wetness often around 3% (control blowdown rate comparing the range of 5% to 10%, is already not too low) salt content can not be ignored when the steam boiler blowdown rate is calculated under this condition. Since K = (S a -S vapor) / (S -S sewage to) = CL- to / (CL- -CL- to sewage) -CL- vapor / (CL- -CL- to sewage)
Recently, in Jiaxing City in Zhejiang Province Nanhu District, officially launched a comprehensive investigation and action on gas boilers and biomass boilers urban built-up areas, and actively promote the transformation of low nitrogen emission gas-fired boiler, Zhejiang Province, determined to win the Battle of the sky made own contribution.
According to the requirements of the investigation, the South Lake district towns, streets, parks within the jurisdiction of the respective gas boilers and biomass boilers urban area to take home from house to house visits Paimo way, the ecological environment Branch area combined with market regulators issuing a list a verification form inventory management. After the statistics were found in the region with gas boiler 35 units, built-up area of biomass boiler Taiwan.
Meanwhile, Nanhu District will be in more than 500,000 cubic meters of natural gas consumption in the four on-site visits to enterprises as a pilot enterprise low nitrogen transformation operations boilers, ecological environment Branch area of personnel, publicity reform provinces, municipalities and low nitrogen emissions on gas-fired boiler requirement that the premise of ensuring safety in production, natural gas boiler NOx emission after the transformation shall not exceed 50 mg / cubic meter, and listened carefully to the enterprise raised about the difficulties of combustion gas boiler low nitrogen transformation exists.
To speed up the investigation and major renovation large boilers, Nanhu District definite time node, before the end of 2019 business model will complete the transformation of low nitrogen gas boiler, at the same time, the city built-up area of biomass boilers implement ultra-low emissions transformation. Nanhu District will adhere to routine inspections and investigation focused on the combination of concentration and control checks and unannounced visits to combine law enforcement when combined with the daily supervision and wrong, and the law enforcement inspection report from the masses combine to ensure long-term monitoring of boiler regulation implemented.
Gas-fired steam boiler operation requires preparation of the first conditions a, there must be quality inspection departments issued "Using the registration certificate boilers" and quality control, pot seized by the inspection department issued regularly boiler inspection certificate. b, must comply with the rules and regulations and operating records "boiler room Safety Management Code" requirements. c, fireman must be approved by a special job training, examination, hold special boiler operations permit, and have skilled operational skills, are allowed to posts. d, water treatment equipment and the laboratory indicators have reached the boiler water quality standards.
What are the skills of the boiler in use The unit of use shall, in accordance with the relevant regulations of the boiler and the requirements of the factory instructions, make clear which performance indicators of the heat transfer fluid shall be analyzed at intervals, but shall at least deal with the residual carbon (≤ 1.5%) of the heat transfer fluid every year. The acid value (0.5 mg KoH / g) viscosity (change should be ≤ 15%), flash point (change should be ≤ 20%) were analyzed. When the two analyses were not up to standard or the content of decomposition component of heat carrier was more than 10%, the measures such as replacement and regeneration should be taken in time. 2. Heat transfer fluids must be dehydrated before they can be used. Different heat conduction The liquid is not suitable for mixed use. When mixed use is required, the heat transfer fluid production unit should provide the requirements of mixing conditions before mixing. 3. The high service temperature of the unit heat transfer fluid, the large temperature difference between the outlet and the return fluid and the high allowable temperature of the heat conduction fluid in the expander (not exceeding 70 ℃ to avoid oxidation) shall be specified, and there shall be a corresponding regulating and protecting device. 4. Man-made mixed water, acid, alkali and other impurities are strictly prohibited. Specifies the interval between cleaning filters.Free Chat
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