Thirteen Five release plan indicates that China's move towards green development pace firmer, Beijing SASAC Building Materials Service Center from its start, the use of green boiler junkers heating for low nitrogen as the primary task before the onset of winter. SAC Building Materials authorities after preliminary investigation and after the screening, the other fast boiler R & D experience in the field of boiler cleaning two decades expressed appreciation can, in August 2017 signed a five Thalia T6 series one boiler and two vacuum with fast Boiler condensing gas boiler products contract.
Boilers which are several general, in what is now the mainstream Why? 1, gas boiler junkers advantages: efficient, clean, environmentally friendly, without manual operation, only need to monitor, small footprint, no transportation fuel, no need to deal with soot, due to the combustion of natural gas free of impurities, without corrosion damage to the boiler and related accessories long boiler life, defined as 15 years, but basically long-term use. Is now mainstream boiler, natural gas is the environmental protection sector, the government vigorously promoted. Cons: You do not know how much that gas prices are calculated according to the calorific value and thermal efficiency, generally bituminous coal per ton of coal (according to 5500 kcal / kg) is approximately equal to 350 to 400 cubic meters of gas. Probably a little slightly more expensive than coal. (No transport, area, ash handling, labor, etc. into the calculation). 2, oil-fired boiler, advantages: substantially the same structure and properties of gas boilers. Disadvantages: higher cost of natural gas is 2 times the boiler, diesel transportation, storage more dangerous, accident-prone. And the domestic diesel supply is unstable, easily interrupted. 3, coal-fired boilers, the advantages: the economy. Disadvantages: 1, requires a lot of ash and coal yard area. 2, a boiler fireman for 4 to 8 people. 3, boiler room and coal yard is very dirty. 4, noise, emissions of dust, nuisance. 5, environmental protection departments often to check an inattentive, he was diagnosed with excessive emissions, maintenance shutdown, fine, very troublesome. 6, coal sulfur content are more severe corrosion of boiler, 10 to 15 years after the basic unusable. Summary: Due to high oil prices and supply unstable now, and now oil-fired boiler has been temporarily withdrawn from the market. Natural gas prices due to regional differences are very different, although you are not sure where the price of natural gas, but natural gas in most parts of the domestic coal is relatively expensive, (only in Sichuan, northwest of cheaper natural gas). Especially large industrial boilers, more fuel, the cost difference is more obvious. Coal-fired boilers to heavy air pollution, with the country on environmental issues more and more attention, more stringent emission requirements for coal-fired boilers, a lot of urban cities, has stopped the examination and approval procedures coal-fired boilers. It is recommended that, if your organization is not large tonnage production of boilers, installation of gas boilers or better, although with a little more than fuel costs, but in the actual operation of the process, you can save a lot of things, while saving area, the environment is clean.
Biomass fuel has the following main characteristics compared to coal:
1. Low sulfur content. Biomass fuels are mostly less than 0.2% sulphur, and there is no need to install a gas desulfurization device when burning, which reduces costs and is environmentally friendly.
2. Most of the carbon in the biomass fuel combines with hydrogen to form a low-molecular hydrocarbon. After a certain temperature, it thermally decomposes and folds out the volatiles. Therefore, biomass fuel is easily ignited,
3. The density is small. The density of biomass fuel is obviously lower than that of coal, and the texture is relatively loose, especially crop straw, which is bulky.
4. Less carbon. The highest carbon content in biomass fuels is only about 50%, which is equivalent to the carbon content of lignite with less generation.
5. Straw biomass contains a large amount of alkali metal elements (mainly potassium and sodium). In the combustion process of biomass, the main performance is that the adhesion of ash is strong, and slagging and clogging are likely to occur in the furnace. Ash accumulates on the heated surface of the tail.
In accordance with article 1.2 13.3.6 to 13.3.8 "boiler junkers design specifications" (GB50041-92): gas-fired boiler provided in the other buildings should be not less than 3 times the amount of ventilation, ventilation hour It does not include the amount of combustion air volume. Dangerous operating room and the like between the gas regulator, the amount of ventilation per hour, should be less than 3 times, when not meet the requirements natural ventilation, mechanical ventilation should be provided, and should be less than 8 air changes per hour accident ventilation times. Fuel pump and reservoir 45 ℃ flash point less than the underground tank of combustible oil, except that natural ventilation, the fuel pump mechanical ventilation 10 air changes per hour should times, six times per hour ventilation should depot mechanical ventilation. The above three are in each room in order to ensure exclusion of air and flammable hydrocarbon disposed a predetermined minimum ventilation rate.