Recently, the Ministry of Environmental Protection by the volatility of the newly revised "Boiler Air Pollutants Emission Standards" released in July this year, the implementation of this standard is known as by far the most stringent air pollution emission standards for boilers, boiler caused by the manufacturing sector.
Compared with the existing standards, new standards not only revised the traditional particulate matter and sulfur dioxide emission limits, for the first time proposed emission control standards for nitrogen oxides and mercury, Forced boiler manufacturers have to upgrade technology, from the source control boiler discharge atmospheric pollutants.
One side is desulphurization and denitrification entered the final stage, while the new emission standards of air pollutants are being introduced amendments to the boiler. Such as pollutant emissions from large wide range of small capacity monomer emission coal-fired boilers and other issues close to the ground long standing will once again be enlarged, comprehensive improvement of coal-fired boilers will undoubtedly become the next focus of urban air pollution control. Analysts believe that the implementation of the new standard direct-driven investment in environmental protection will reach 370 billion yuan to 4500 yuan, while the boiler manufacturing industry is facing exams has also led to the relevant environmental protection equipment market to break out again.
By the end of 2011, our country in the boiler 620,300 units, of which 09,700 units utility boilers, industrial boilers 610 600 units, with a total capacity of about 3,515,900 kilowatts. In 2012, industrial boilers reached 62.4 million units, about 98% of the total number of boilers.
In industrial boilers, coal-fired boiler is more than 80%, the annual consumption of 490 million tons of standard coal, the average efficiency of 65% to 70%, emissions remain high.
In 2012, coal-fired industrial boilers cumulative emissions of dust 4.1 million tons, 5.7 million tons of sulfur dioxide, nitrogen oxides 2.0 million tons respectively, accounting for 32% of total national emissions, 26% and 15%, a major cause of fog and haze one of the reasons.
For this reason, in the 2013 set off a nationwide clean energy alternative coal-fired boiler boiler, more than one place Shandong, Shanxi and other relevant measures have been introduced on clean energy alternative to coal-fired boiler work. "The introduction of the implementation of the most stringent standards, will set off a coal-fired boiler in the second round.
Four existing small and medium sized coal-fired boilers in China. One pollutant emissions from large, wide surface. Second, small-cell capacity, the average capacity of 8 tons / hour, the number of 10 tons / hour of small coal-fired boilers is 42 million units, accounting for two-thirds of the total. Third, emissions close to the ground, a great impact on quality. Fourth, boiler technology, main and auxiliary mismatch, poor health. In addition, most small boiler lack of dust removal, desulfurization and denitrification equipment, led to the current sulfur dioxide and dust emissions from boilers widespread non-compliance.
From the present point of view, domestic clean energy technology matures, the implementation of new emission standards for technology development has brought very good driving force for the future, who can stable up to standard technical requirements of the country, will have a presence in the market value Otherwise it can be eliminated.
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Steam boiler at the Sheung Shui should pay attention to things steam boiler before ignition to conduct a comprehensive inspection of steam boilers, steam boilers Sheung Shui things should note the following requirements: 1, the steam boiler water quality requirements, if the point of use water boiler size pressure steam calculation water hardness is too high should be supporting, supporting demineralized water hardness can reduce scaling in the boiler tubes, thereby increasing the life of the boiler to reduce operating costs. 2, Sheung Shui, when should slow to add water inside the steam boiler feed water temperature is not too high. 3, add water, not too much, as the temperature of the water will continue to increase expansion, resulting in waste. Generally, add water to the normal water level of the water line also is the middle line on it, now supporting the steam boiler above all intelligent devices in Sheung Shui, simply open the smart addition of water it can be had. 4, to put inside the boiler economizer and air inside the boiler duct excluded when water was added. 5, after the Sheung Shui to see whether the water level in the water level dropped, there may be drain valve not closed tightly reason, you should check the steam boiler population during the Sheung Shui, welding flanges, pipe is leaking phenomenon exists, if found leaking immediately stop adding water and appropriate treatment.
Coal fired steam boilers is a closed vessel in which water is heated. The heated water exits the coal fired boiler for use in various process or heating applications. The pressure vessel in a 5 ton coal fired steam boiler is usually made of steel (or alloy steel), or historically of wrought iron. Stainless steel is virtually prohibited (by the ASME Boiler Code) for use in wetted parts of modern coal fired boilers, but is used often in super-heater sections that will not be exposed to liquid boiler water. In live steam models, copper or brass is often used because it is more easily fabricated in smaller size boilers,like 5ton coal fired boiler for sale.
When multiple pressure relief valves are used in parallel, one valve should be set at or below the MAWP and the remaining valve(s) may be set up to 5% over the MAWP. When sizing for multiple valve applications, the total required relief area is calculated on an overpressure of 16% or 4 psi, whichever is greater.Learn More
May 01, 2005 · Improperly sized distribution piping can raise pressure drops or increase heat loss. Undersized piping after pressure reducing valves can cause erosion of components. Undersized piping after steam traps can cause water hammer. When operating a boiler for process or building heat, engineers deal withLearn More
Online calculator with Saturated Steam Table by Pressure. Includes 53 different calculations. Equations displayed for easy reference.Learn More
e) Boiler operating pressure = 100 psig f) Continuous Boiler Blowdown flow - Required g) Bypass recirculation flow Required h) Altitude Sea level i) Pressure in deaerator tank above atmospheric pressure = 5 psi (14.7 + 5 = 19.7 psi absolute) j) Height of deaerator tank minimum water level above pumps first impeller = 10 feetLearn More
Boiler Formulas. Factor of Evaporation Water enters the boiler at 225°F. The boiler pressure is 100 psi and the boiler water temperature is 338°F. The latent heat is 881 Btu. What is the factor of evaporation? FE = SH + LH / 970.3.Learn More
Steam pipe sizing is easy with todays sizing programs. When using a sizing program to select steam pipe sizes, the engineer or contractor is asked to fill in the capacity, the steam pressure, and the velocity required. The answer is a pipe size and a pressure drop per 100 feet of pipe. Lets look at this required data.Learn More
Steam Boiler Pressure settings: This article describes the normal operating pressure range for residential steam heating systems and for commercial or high-rise building steam heating systems. The article also provides links to details about the pressure control and safety controls on steam heating systems & boilers.Learn More
reducing the 3 meter above to a 2 meter increases the effective turndown to 18:1) Effective Turndown / Sizing. Straight pipe run conditions the flow profile Flow conditioners can minimize straight run requirements. Straight run requirements are determined by the nature of the obstruction.Learn More
The operating pressure of a heating boiler (hot water or hydronic heat) is read at the pressure and temperature gauge (see above) and controlled by. The starting or "cold water" pressure at the boiler - typically at 12 psi is for typical U.S. / Canadian residential heating systems normal cold temperature starting pressure. U.K. and europeanLearn More
Boiler design is the process of designing boilers used for various purposes. The main function of a boiler is to heat water for steam generation. Steam produced can be used for a variety of purposes including space heating, sterilization, drying, humidification and power generation.Learn More
I think youre putting the cart before the horse. First of all, you need to determine how many square feet of surface on the interiors of the fire tubes are needed to transfer sufficient heat to generate the needed amount of steam.Learn More
A boiler is a vessel in which water is heated under pressure and vaporized into steam for a specific purpose. There are several different kinds of boilers, heated by coal, solid fuel, oil or gas. Boilers vary widely in size from small, portable or shop-assembled units to large furnaces that burn 6 tons of coal a minute.Learn More
Jun 23, 2014 · If you have more piping and radiation than you have steam to heat it, the steam won't make it to the end of the run. You'll wind up with a cold house that costs a lot to heat, and inadequately at that, but I think you're making a mistake if you size a replacement hot water boiler that way." He shook his head. "That's the way I do it.Learn More
Online calculator to quickly determine Steam Pressure Loss through Piping. Includes 53 different calculations. Equations displayed for easy reference.Learn More
Steam-boiler systems are available in a broad range of sizes. The following steps apply to pump selection for an industrial steam boiler with a horsepower range of 100 to 1,200 and a design pressure of 150 to 500 psig. With large applications, it is common to install multiple boilers parallel to one another.Learn More