For atmospheric environmental quality issues, Harbin City, Heilongjiang Province, submitted a gratifying annual summary to the people within the city. By 2018, the number of days Hashi ambient air quality standard of 310 days, an increase of 40 days, since the implementation of our 2013 new environmental quality standards, the best of the year.
January 2019, the development of ambient air quality continues to improve. "Good weather" gratifying is the result of Harbin in straw Jinshao, such as firecrackers ban on burning the same time force. Among them, strongly promote the elimination of coal-fired boilers is a top priority. According to statistics, in 2018, out of a total of 1191 Harbin coal-fired boilers to provide strong support to reduce emissions of air pollutants.
Harbin coal-fired boiler was closed down following a major way, into the central heating (including wholesale) or clean heating pipe network replacement. According to the principle "and the appropriate and, should the electric power, the gas should be gas", the clean coal central heating pipe network coverage area, the boiler unit according to claim ownership, the priority region incorporated central heating pipe network; in concentration not covered by district heating network, in accordance with the wishes of the boiler unit property, taking clean renewable energy or alternative heating means, out of coal-fired boilers.
At the same time, various related businesses also improved stations, actively cooperate with the phase-out of coal-fired boilers.
2018 Hashi out of coal-fired boilers intensity of the strongest of the year, out of range built-up area expanded from 9 to zone outside built-up areas, out of a total of 1191 units. In District 9 built-up areas, on the basis of 10 tons of steam per hour out of coal-fired boilers to achieve "clear" on the further elimination of more than 10 tons of steam per hour to 99 coal-fired boilers; county (city) district built out of steam per hour 10 116 tons of coal-fired boiler units; elimination of financial support and utilities per hour 10 tons of steam coal-fired boilers 966 units in urban and outside built-up areas in the 9th district. "Achievements accumulated over the years, significantly reducing the use of coal, reduce emissions of pollutants." Director of Air and Noise Pollution Control at the Harbin environment bureau, Li Bin Tang said.
"In order to further solve the pollution problems of coal-fired, 2019, Harbin plans in urban areas, the county (city) built-up area basically eliminated 10 tons of steam coal-fired boilers and furnaces and tea, operating the stove, coal grain storage and drying equipment coal-fired facilities; urban built-up area basically eliminated 20 tons of steam coal-fired boilers, push 35 tons of steam coal-fired heating boilers out of the urban built-up area can not be a stable discharge standards; outside built-up areas out of 10 tons of steam can not be stable discharge standards of the following coal-fired boilers. "Li Bin Tang said.
Large bath, bath with hot water boiler as what are the problems, baths and bath are all civilian areas, mainly by providing heating and hot water to the majority of people take a bath for heating, under normal circumstances, there are three main ways of heating their Zhang situations: 1, the traditional coal-fired steam boilers coupled with heat exchangers this method has also been widely used before the second five, but as residents increasingly high demand for this piece environment has gradually withdraw from the stage of history coal-fired boiler currently in the State Department regulations already belong to one of the forced removal and renovation projects, so this method is not suitable for urban populations. 2, the use of biomass pressure hot water boiler utilizing biomass energy field is currently the best known way, the low cost of the boiler, the fuel in the fuel cost is lowest of all, but because of the limitations of raw materials must be equipped with fuel special fireman job, and because biomass fuels, after all, just a lot of places can not be fully developed so popular is the future direction of development. 3, gas-fired hot water boiler vacuum vacuum hot water boiler is the new trend in hotels heating sector. Vacuum hot water boiler's heat exchanger is built, it can be directly required hot water temperature. So vacuum boiler for heating and sanitary hot water are no secondary heat exchanger. If for sanitary hot water, then only need to install a hot water tank, and then directly set the heating water temperature can be directly used for water heating. Vacuum hot water boiler for heating and advantages of the hotel Hotel sanitary hot water supply are: ① security: Vacuum negative pressure boiler operation, there is no risk of explosion, very safe, is expressly provided free national supervisory inspection of boilers. ② system is simple: direct water, and heat exchangers can be built multiple, simultaneous heating and sanitary hot water supply. Efficient ③: a high thermal efficiency, thermal efficiency is generally over 94%.
Vacuum boiler works, features and advantages: vacuum steam boiler equipped with a temperature controller system and a security alarm system is set, when the temperature reaches the set boiler stopping the machine control system will automatically cut off the electrical and gas systems, and issues Audible alarm. Any of a vacuum boiler vacuum gauge, a vacuum switch, a vacuum pump monitoring system, the flue gas temperature sensing probe, etc. abnormal, the control system will automatically cut off the electrical and gas systems, with sound and light alarm. Vacuum adsorption boiler is equipped with a safety valve, start overpressure, to achieve the purpose of safety relief. Preventing overheating protection device, when the boiler temperature exceeds 100 ° C, automatic fuse protection device, the gas system and cut off the circuit, so as to achieve a safety pressure relief, the working principle of vacuum boiler water at atmospheric pressure (1bar), boiling point of 100 ℃. Pressure below 1bar, the boiling point of water becomes less than 100 deg.] C; pressure -0.7bar, a boiling point of 90 deg.] C; pressure -0.3bar, a boiling point of 70 ℃; pressure -0.1bar, a boiling point of 40 ℃ vacuum hot water unit. after the hermetic chamber is formed by a vacuum pumping the vacuum chamber, the combustion heat medium boiling water vapor generates a negative pressure in the vacuum chamber, the vapor condenses in the external heat exchanger, the heating temperature and the cold water pipe to the user through the water after the vapor condenses to form water droplets flow back into the heat medium water, re-heating evaporation, thus completing the cycle, the unit is less than the normal operating pressure -0.7bar. Heating medium water is treated by a special cleaning, deoxidation high water, washed once injection is completed before delivery from the factory, in a closed loop inside the unit during use (evaporation - condensation - vaporization), not increase, not decrease, the unit life without need to be supplemented or replaced.
Comparison of boiler failure rate and safety between boiler failure rate: 1, degree of vacuum in the vacuum boiler furnace boiler * important indicator of stable stable operation of the four main factors often influence the degree of vacuum: 1) boiler and valves, The instrument has no leak points, including the inlet valve and instrument currently can not guarantee no leakage occurs within 3 years. 2) whether the control section failure, the boiler controller and negative pressure controller also fails in operation is inevitable, such as the failure rate even higher internal controller 3) a vacuum pump, if the three-way electromagnetic valve normal, due to the vacuum pump, three-way solenoid valve is not run frequently, imported and seizure operation also prone to failure. 4) Load not have mutations, altered boiler load is normal to the boiler, the boiler can meet generally 30% -100% of the load adjustment. Above failure will cause the boiler to change the degree of vacuum, should check the airtightness of the boiler, the control section is normal, the vacuum pump, the three-way solenoid valve is normal, check load changes, if the check is normal and negative pressure controller setting, after everything is normal vacuum level recovery boiler can also normal use, or to repair a comprehensive inspection shutdown. The actual operation of the vacuum boiler breakdown maintenance rate is higher than the pressurized steam boiler, a steam boiler control requirements than. 2, pressure boilers including a boiler only basic time, temperature, level control, controller selects imported hot water boiler, as compared to a lower failure rate. No need to maintain the degree of vacuum control equipment, no complicated control equipment, personnel operating requirements simpler than vacuum boiler, the less chance down for maintenance, the actual running hot water boiler to be much more stable. Compare the safety of boiler: 1, vacuum boiler if for the above four factors the degree of vacuum boiler is not guaranteed, it may cause a rapid rise in boiler pressure, boiler is a closed structure, if careless operator, it is possible to be there dangerous pressure steam boiler, vacuum boilers run more negative safety is based on the premise degree of vacuum boiler must not be problems. 2, atmospheric pressure hot water boiler boiler-through the atmosphere, as simple as boiling water, any failure will not cause pressurized boiler, boiler more secure, truly without any danger.
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