How to identify whether the toxic chemical plant boiler emission sources on how to identify whether the toxic chemical plant boiler emission sources? Now, the chemical inside the boiler or the production of major productivity. But there is a time of some chemical plants for production of boilers, flue gas emissions place are smoke smoke. Which is the most common white smoke tobacco, and there are a lot of people will find that the more obvious the more cold weather white smoke, which is why in the end, saw the boiler flue gas chemical plant will be white coming out. In fact, most white column of smoke, especially in cold weather to see, and water vapor is condensed water droplets nothing. Boiler feed water tank is equipped with a chimney, only water vapor and air emissions. Water is one of the important by-product of combustion, so the chimney of coal, oil and natural gas boilers have water vapor. To reach reduce dust pollution emission regulations, companies will discharge terminal apparatus water filtration apparatus into the exhaust gas boiler water filtration, all the inside of the dust filtered off, and then discharged to the atmosphere. Hyperthermia with dust filter, the exhaust gas is also absorbed by water to form water vapor is discharged from the chimney, the cold white smoke that we see a. In chemical plants, always able to see a kind of braving the plume of flame, burning in it day and night, in fact, this is not a column of smoke, its name is called safe torch. Chemical plant in the production process, many of flammable and explosive gases can occur, many of which are harmful. They are large heavy than air, if released into the atmosphere, by extension, be deposited on the ground and reaches very high concentrations, which will form a serious environmental pollution and damage to human health, should encounter fire, the fire will be formed, and the blasting . In order to prevent the onset of these risks, people will set them up and burn to prevent future trouble. There is also a mistaken chimney built, in fact, they are cooling towers, water vapor is discharged from the sterilization algae and some trace of drugs. Cooling towers is cold and hot water and steam generation using the air flow after the touch, the steam reaches the transpiration transpiration remove heat dissipation, convective heat transfer principle of thermal radiation and dissipate heat like occurs in industrial refrigeration and air conditioning, or to decrease the water temperature transpiration cooling means to ensure the normal operation of the system, it is above the water vapor.
Fuel gas-fired boiler is different from coal-fired boilers, which requires the use of a burner fuel is injected into the boiler furnace using a combustion chamber without the use of fire grate facilities. Because not produce fuel ash after burning fuel gas-fired boiler, fuel gas-fired boiler so without slagging facilities. Oil injected into the furnace, if the gas and air mixture within a certain range, or turned off, it is easy to explode. Therefore, fuel gas-fired boiler combustion required to adopt automation and control systems. Fuel gas boiler compact, small boiler and ventilation, water supply, control and auxiliary equipment are arranged on a distribution box, it may also be assembled and medium-sized factory.
Since 2017, located in Changchun City, Jilin Province to accelerate the governance of coal-fired boilers within the city out of small coal-fired boilers remediation process. Up to now, the work has achieved initial success.
15 in the city with 20 kilowatts and above the coal-fired generating units, 13 units have ultra-low emissions; city table 292 with 20 t steam / hour or more coal-fired boilers, emission standards have reached the count 253 male , accounting for 86.64% of the proportion of the boiler with; the city built area of 10 steam tons / hour small coal-fired boilers 2962 units, out of a total of 29553 units, up 99.7% out of proportion, the basic completion of the national requirements out of the task.
In order to further improve air quality, improve people's living environment standards index, Changchun City by expanding the ban on burning area, improve the standard phase-out of coal-fired boilers, plans to use two years of urban 20 tons of steam / h coal-fired boiler (kiln) furnace eliminated.
By the end of 2017, the city has eliminated 20 tons of steam / hour coal-fired boilers 964 units; at the same time to speed up the central heating and (expanding) network as well as the pace of clean energy promotion, provide for the transformation of the city's coal-fired boiler control a strong guarantee.
In recent years, Changchun City, adhere to the full implementation of coal-fired boilers governance, to improve ambient air quality in Changchun City has played a positive role. 2017, good days Changchun 276 days, compared with 2013, an increase of 35 days; heavy pollution days 10 days compared to 2013, reduced by 33 days; major air pollutants respirable particulate matter (PM10) and fine particles (of PM2.5) were 78 mg / m and 46 micrograms / cubic meter, respectively, 39.5% and 37.0% decrease over 2013.
What anti-corrosion measures SZS water-tube boilers are divided into specific fire-tube boilers and water tube boiler structure according to the classification of the boiler body, according to the type of boiler fuel classified as a coal-fired boiler, oil boiler, gas boiler. Process boiler operation will have a certain degree of corrosion. Found sulfide under high temperature conditions, the flow of chloride ions and high temperature flue dust contained in the friction member is the main cause of corrosion of the boiler. A, for water-tube boilers, corrosion occurs primarily at the water wall or furnace wall, the temperature is higher. In particular, severe corrosion, heat utilization is low, less than 50% thermal efficiency. High temperature coating far-infrared radiation, high temperature up to 1700, may be maintained at a high temperature high emissivity, holding about 0.9, dense coating, excellent corrosion resistance. Second, for the fire-tube boiler, the corrosion occurs mainly on the water wall. Corrosion of high temperature oxidation and corrosion of various impurity ions sulfur, chlorine, fluorine ion etching, and abrasion dust in the flue gas. Can effectively increase the boiler water wall heat exchanger, the temperature of the water wall tubes can be reduced, slowing the rate of corrosion. Third, the external boiler, security risks caused by high temperature oxidation corrosion and high-temperature operating environment is client concerns, has a low thermal conductivity, purely inorganic coatings, environmental protection, can effectively prevent heat conduction, that is, to avoid the heat energy waste is also working to reduce the security risk operating environment. Fourth, the exhaust heat boiler, the flue gas condensation by corrosion is mainly caused by friction and dust. And flue gas heat exchanger during brushing energy corresponding high temperature coatings, protective substrate, extend the life of the substrate, saving energy resources, greatly reduce costs.
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