industrial gas fired package steam boiler price
The need for paper industry paper industry conversion of coal-fired boilers to gas boiler is a boiler equipment industry needs is more important, because a lot of links to the papermaking process requires a lot of steam drying, stereotypes and so on. However, along with the national policy of environmental protection departments to ban coal-fired boilers, and now more and more manufacturers have to use coal-fired boilers to coal-fired boilers upgrading or purchasing a new low - NOx emissions. Paper mill boilers from coal to gas fired boiler is an important direction of current reform, is one more type of enterprise transformation, especially in the area more natural gas, coal into gas boiler is the main way. 1, in order to transform mechanization layered fired boiler gas boiler, you should first remove the front arch and a rear arch, while increasing the bottom heating surface, instead grate, grate to prevent overheating, combustion; 2, through the furnace heat transfer calculation methods determining the size of the boiler, furnace flame center position, and then pouring furnace work. In order to avoid the center position after arch boiler tubes, based on the original slope of the original arch made pipe. 3, the furnace in order to prevent an explosion, when the coal-fired boiler furnace gas is substituted, or when fuel not atomized combustion gases in the furnace incomplete combustion or heating surface of the end of the furnace, a fire or explosion occurs, should be mounting the appropriate parts of the boiler explosion vent, and to increase the ignition and flame failure protection program control to automatic control means, to ensure safe operation of the boiler. 4, is closely related to the selection and arrangement of the burner and furnace, the filling degree of the flame in the furnace should preferably not to form a dead air. Gas burner arrangement considered reasonable and piping layout, easy operation, maintenance and inspection.
Expected by the end of this year, Jiangsu Province, the province will complete the ultra-low emissions below 100,000 kilowatts coal-fired units. It's Jiangsu Province, following more than 100,000 kilowatts ultra-low emission coal-fired units in 2017 renovation, energy-saving and environmentally friendly coal a "first in the country."
According to statistics, Jiangsu Province in energy consumption, accounting for over 60% of coal, which accounts for coal and coal consumption sticking. Industrial emissions of air pollution is the bulk, ultra-low emission power plants, clean coal is to enhance efficiency, promote air pollution control "top priority."
According to the deputy director of Jiangsu Provincial Development and Reform Commission Energy Bureau, Jiangsu Province coal units in the national energy conservation program first started, the fastest progress. In the coal transformation "mentioned standard extended surface" advancing, Jiangsu Province by the national requirements of more than 300,000 kilowatts stand-alone, single expanded to more than 100,000 kilowatts, 100,000 kilowatts this year covering the following units. In order to promote energy saving coal-fired power plant, Jiangsu Province, also the first start price subsidies, together with local award and subsidy, enterprise since the vote, five years invested a total of 23.4 billion yuan.
Price subsidies coupled with strict control of environmental protection, promote the province of large-scale coal-fired power plants, clean production. By the end of last year, Jiangsu Province, a total of 225 sets of 73.6 million kilowatts coal units to complete the environmental transformation. Combined with the transformation of coal to the end of last year, out of sync, Jiangsu Province, small thermal power units 2.95 million kilowatts.
Coal transformation of wide coverage, high standards, emissions dropped significantly. Emissions of coal dust, sulfur dioxide and nitrogen oxides three major pollutants, Jiangsu line monitoring mean values of 2.3 mg / cubic meter, 18.5 mg / cubic meter and 35.5 mg / cubic meter, effective domestic optimal. Transformation, Jiangsu Province, to proceed with flue gas heat recovery, central heating, shutting down small thermal power, 25.7 million tons of standard coal last year to save.
Significantly reduce the amount of coal emissions at the same time, the province "Blue Sky index" every year. According to the Provincial Department of environment statistics, since 2013, the province PM2.5年均浓度连续 six years continued to decline, good days than from 60.3% in 2013, rising to 68% last year.
Boiler steam temperature affect the safety and economy temperatures above will be lower than the rated temperature of the device, it will have a bad effect. If the temperature exceeds its rated value, the boiler will cause overheating of the relevant metal material, material creep acceleration, will shorten the life of the boiler. If the temperature is too high, but some of the key components of the boiler would cause damage, can also cause serious and even superheater tube rupture. If the temperature is lower than the rated temperature, vapor enthalpy is reduced, increased air consumption, decreased economy. This will reduce the thermodynamic cycle efficiency of the plant, the steam humidity at the last stage blades of the gas turbine increases, causing erosion and damage to water droplets gas turbine blades, affect the safe operation of the gas turbine. Ruoyin with water vapor causes a decrease in temperature, the moisture in the salt impurities formed in the superheater scale, pipe valves, gas turbine blade, because the superheater lead to reduced heat transfer, the temperature decreased, damage increased wall temperature; and cause the valve plug, the operation failure; and a gas turbine blade erosion, loss of balance and vibration occurs. Temperature fluctuations reason superheater actual heat transfer the vapor does not reach the required amount of heat absorbed corresponding balancing. When the heat absorbed is greater than the heat transfer, the temperature rise; conversely decreased. Many factors affect the temperature change, including both gas side and the vapor side. Such as boiler load increased, but also to ensure the boiler load unchanged or decreased in order to prevent pressure shall increase the amount of fuel and air supply, strengthen the burning, causing the furnace exit flue gas temperature of the flue gas volume increases and lower water temperature , temperature increase; If the oil and gas fuel is combusted in the furnace carbon black is not fully formed, into the superheater flue causing secondary combustion, but also greatly increase the superheat temperature. Reducing the temperature of the main reasons: improper adjustment of combustion, low flame center furnace; superheater area is small, or too much leakage at the furnace wall; Save water flow rising or temperature reduction; drum water level or high gas-water separator separating efficiency is lowered, the humidity of the vapor is increased; superheater tube fouling, reduced heat absorption and the like.
Preparation and method for measuring the moisture content of the flue gas of the boiler before the boiler purchase this product knowledge and understanding, the present, it is necessary for two reasons, first, it is the site of important product and the main key one word, and second, the products are widely used, why we have these conclusions and specific requirements. Meanwhile, I hope that we can be taken seriously and, in order to have learned well and apply their knowledge to practical work flexibly. Is there some preparatory work before the boiler 1. buy? Boiler products to buy, this is an important job, and need to be taken seriously, but also want to take into account all relevant factors, in order to have accurate judgments and the correct choice, a good choice to avoid mistakes. Before carrying out this work, is the need to do some preparation, use of the product to the environment and have a clear understanding of the requirements and learn about product origin, specifications, technical parameters, materials, quality, price, service and product manufacturers these and other basic information, in order to compare and consider, then, the right to choose their own products. 2. whether Sheung Shui before the boiler starts have specific requirements? From a professional point of view, Sheung Shui before the boiler starts, there are some basic requirements, which specifically is: If the hot water boiler, the water speed before it starts not too fast, not be less than the winter time Sheung Shui 4 hours, in other seasons upper water time of not less than 2-3 hours. And, at the beginning of the water, its water speed to slow. If the boiler is cold, it's inlet temperature in the range of 50 ℃ -90 ℃, and the difference between the water temperature and the temperature of the drum wall into the steam drum, not greater than 40 ℃. 3. What is the chain boiler? Chain boiler, which is a particular kind of a boiler, a higher degree of mechanization layers fired boilers, the time the track grate with a chain similar to these so called chain boiler A boiler. Further, it is a pre-boiler, the coal combustion process is completed in the movement. Advantage of this kind of boiler, the combustion condition is stable, high thermal efficiency and easy operation, in addition, its low concentration of dust emissions. However, it should be noted that the moisture content of the larger, more ash and strong coking coal, not suitable for this kind of boiler for combustion. 4. How the moisture content in the flue gas boiler measured? Determination of moisture content in the boiler flue gas, which is the weight measurement method, condensation method, and three psychrometer, and the moisture content of the flue gas is typically in the volume percent of water vapor in the flue gas content to represent. If dark gravimetry, need to use hygroscopic agent, the hygroscopic agent used is calcium chloride, calcium oxide, silica gel, alumina, phosphorus pentoxide, magnesium perchlorate and the like.