20 tph SZS condensing gas-fired steam boiler for paper industryBaoding Dayi Paper Co., Ltd. is located in Wangjiaguan Industrial Park, Shunping District, Baoding City, Hebei Province. The company covers an area of 5.33 hectares. At present, the company mainly has "Baihui", "Daiyi" two major brands, products for toilet paper roll, facial tissue, handkerchief paper, napkins and other series of living paper. Because Dayi uses 100% importing raw wood pulp as raw materials, the production of paper products must be sterilized at high temperature. Therefore, Baoding Dayi Paper chose to cooperate with our company. Our SZS series 20 tph condensing gas-fired steam boiler owns many advantages, like full combustion of fuel, high efficiency, low energy consumption, clean and non-polluting. Its high-temperature steam generated through the conversion of energy, it helps Dayi Paper to achieve a variety of technological purposes such as cooking and drying.

1. Reduce the heat loss of boiler exhaust:

(1) The air leakage rate of the high air preheater, especially the air leakage rate of the rotary air preheater;

For the 2018-2019 autumn-winter air pollution prevention and control work, Jinhua City, Zhejiang Province issued a public draft, mainly in the autumn and winter to reduce heavy pollution weather Development frequency.

Take measures to reduce coal comprehensive, non-electric focused on reducing the total coal consumption, in 2018 the city's total coal consumption reduction of 1% compared with 2015. New non-owned coal-fired units, the implementation of new large-scale coal-fired units and coal consumption of the same amount of capacity reduction or substitution, elimination of energy consumption, water consumption, environmental protection and safety is not up to 300,000 kilowatts coal-fired units. Development of industrial parks "One District One heat source" action plan, and more than 300,000 kilowatts coal-fired units were heating transformation, promote backward and shutting down small coal-fired thermoelectric integration of coal-fired boilers in the range of 15 km radius of the heat. Optimize the use of natural gas structure, in principle, to new natural gas cogeneration and gas chemical projects, to the new "coal to gas" projects, should adhere to increase coal gas reduction synchronized to gas will change, the premise of the gas supply contract signed and orderly implementation.

Coal-fired boiler (with tea furnace, operating a stove, grain storage and drying equipment, coal-fired facilities) carried out an intensive investigation to ensure that no dead ends, no blind spot. Investigation and the coal-fired boilers to register one by one.

According to the law to increase the city's efforts to phase out coal-fired boilers in accordance with regulations. Before the end of December 2018, the city basically out of 10 tons of steam per hour of coal-fired boiler, built-up areas out of 35 tons of steam per hour coal-fired boilers. Complete 1 set (Yiwu) per hour, 40 tons of steam coal-fired boilers transformation of ultra-low emissions, coal-fired plants to achieve ultra-low emission levels.

In principle, the boiler NOx emission is not higher than 50 mg / m, and comply with appropriate safety boiler specification. New installation and reconstruction of gas-fired simultaneously supporting the low NOx combustion device.

Biomass boilers to carry out a comprehensive investigation, complete control of boiler scale, distribution, fuel, furnace, pollution control facilities and pollutant emissions, and establish a list of management accounting. Yan Gesheng biomass boiler registration, strictly control the new urban area of ​​biomass boilers. Biomass boilers should be dedicated boiler, coal and other prohibited blended with other fuels, efficient dust bags and other ancillary facilities. Actively promote the urban area of ​​biomass boilers ultra-low emissions transformation. For existing biomass boilers, environmental inspection carried out one by one, there are multiple distributed biomass boilers, the implementation of the demolition of small and large industrial agglomeration area.

1. The Classification of boiler blowdown

Continuous blowdown: continuous blowdown is to discharge some dissolved salt from the boiler water to maintain a certain salinity and alkalinity of the boiler water. This kind of blowdown is continuously discharged from the evaporating surface with the greatest salt concentration in the drum water, also known as surface blowdown.