What are the overall structure of the boiler boiler structure includes two major boiler and auxiliary equipment. Boiler furnace, drum, burner, water wall superheater, economizer, air preheater, and the furnace wall, etc. The main frame member constituting the core part of the steam production, called boiler. Boiler body is in two main parts and drum furnace. Also known as the furnace combustion chamber, fuel combustion for space. The solid fuel on to the grate, referred to as a fire bed combustion furnace Stoker, also known as fire bed furnace; solid fuel furnace liquid, gas or pulverized, is injected into the combustion chamber is called the fire chamber burner, also known as the furnace fire chamber; air coal particles burn hold it was boiling, and the furnace is inferior fuel suitable for combustion is called fluidized bed furnace, also called fluidized bed furnace; coal particles so that an air flow rotated at high speed, and strongly called fire cylindrical cyclone furnace hearth. The furnace cross-section is generally square or rectangular. Combustion fuel to form a flame in the furnace and high temperature flue gas, so the hearth around the furnace wall is made of refractory material and insulation material. On the inner surface of the wall of the furnace waterwall tubes often laid, it will not burn both protect the furnace wall, and absorb a large amount of radiation heat of the flame and the high temperature flue gas. Furnace design needs to fully consider the characteristics of the fuel used. Each boiler should be fueled with the original design of the fuel. Boilers running economy and reliability are likely to vary greatly reduced when using the characteristics of fuel combustion. And the natural circulation drum is repeatedly forced circulation boiler receiving feedwater to the economizer, the coupling cycle and supplying saturated steam superheater cylindrical vessel. Simplified drum made from high quality steel plate, is one of the heaviest components of the boiler. The main function of the water storage drum, a steam separator, brine and water excluded pot sludge in operation, to avoid the boiler water containing a high concentration of salt and impurities entering with the steam superheater and a steam turbine. Internal drum means comprises a moisture separator and a steam cleaning apparatus, water distribution pipes, sewage and dosing equipment. Wherein the effect of soda is separated from the water wall by means of saturated steam and water to leave, and to minimize the steam carried fine water droplets. Low pressure boiler used as a crude flap and slit baffle separating element; above except pressure in the boiler is widely used for various types of rough separation cyclone, but also with blinds, steel mesh plate or the like are vapor further separation. The drum is also equipped with water gauges, safety valves and other monitoring and protection facilities. In order to improve the design and performance assessment, often have to go through boiler thermal balance test. Direct methods to calculate the thermal efficiency of the boiler is called n-efficient use of energy balance, the heat loss from a variety of methods to counter the counter balance called computational efficiency. When considering the practical benefits of the boiler room, boiler thermal efficiency not only look, but also taking into account the energy consumed by the auxiliary boiler. Fuel per unit mass or unit volume of complete combustion, calculated according to the chemical reaction called the theoretical air quantity of air required. In order to have more opportunities to the fuel in contact with oxygen in the furnace combustion, the actual amount of air into the furnace is always greater than the theoretical air amount. While air can be reduced into a multi incomplete combustion heat loss, but the heat losses will increase, also exacerbate corrosion of sulfur oxides and nitrogen oxides generated. We should therefore seek to improve combustion technology, as small as possible in order for the excess air ratio in the furnace so that complete combustion. Dust contained in the boiler flue gas (including carbon black and ash), sulfur and nitrogen oxides are air pollutants, which can achieve emissions targets environmental regulations when unpurified indicators several to several tens of times. These substances emissions control combustion pretreatment, improved combustion techniques, dust removal, desulfurization and denitration. By means of a high chimney stack can reduce the concentration of pollutants in the atmosphere of the area. Flue gas dust removal force used gravity, centrifugal force, inertial force and acoustic adhesion, static electricity and the like. Is generally used for separating coarse particles gravity settling and inertial force, centrifugal separation is often used dust bag filters and electrostatic precipitators having a high dust removal efficiency at higher capacity. Wet venturi - water film adhering water film droplet precipitator ash, high collection efficiency can absorb gaseous pollutants. Since the 1950s, people strive to develop the comprehensive utilization of ash, harm into. The manufacturing cement, bricks and building materials such as concrete aggregate ash. Since the 1970s and from the fly ash cenospheres extracted as a fire-resistant insulation and other materials. Future development will further improve boiler thermal efficiency of boilers and power plants; reduce equipment cost per unit of power boilers and power plants; enhance operational flexibility and level of automation of the boiler unit; develop more varieties to suit different boiler fuel; and improve boiler unit the reliability of operation of the auxiliary equipment; reduce environmental pollution.
Gas-fired steam boiler in korea has a positive effect on sustainable development: the increasingly tense in recent years as the price of coal and coal supply more of our day to rise, more and more companies turning to heating gas heating from the traditional gas heating, gas-fired steam boiler heating for its environmental protection, energy conservation in the country has been more widely used, in particular, focus on the most popular heating gas boiler room. From an economic analysis using gas steam boiler operation point of view, generally more than 5 years of small and medium sized gas steam boiler no longer have the value of the Burning gas. Many of our cities in a few years ago began to control the construction of small and medium sized gas steam boiler, the boiler was included within the scope of the demolition basically a longer useful life or the furnace has been out of the product. Be evaluated by the thermal efficiency of a steam boiler and to detect the remaining useful life, with the new gas boiler economic comparison can be seen, simply to change the method of gas fired boilers have undesirable manner by replacing the burner. Gas-fired steam boiler is the ideal replacement for gas steam boiler. Although the thermal efficiency of the fuel steam boiler was also higher, but the smoke pollution in the atmosphere is much larger than gas-fired boiler, steam boiler fuel and there are also issues related to oil transportation and storage, it lost the advantage of long-term development. Gas steam boiler and a steam boiler with gas as compared to the obvious advantages: Since the gas in the ash, sulfur and nitrogen-containing volume is lower than the content of the coal, the amount of dust generated in the flue gas after combustion minimal emissions the flue gas is easier to meet the standards required by the state of combustion equipment, the use of gas-fired boilers can greatly reduce the pollution of the environment. A high intensity gas furnace volume the hot steam boiler, due to the small smoke pollution, a strong convection tubes from corrosion and slagging, heat transfer effect, a large amount of combustion gas triatomic gas radiation, and low exhaust gas temperature, make thermal efficiency improved significantly. Aspect of saving the equipment investment boilers, gas steam boiler furnace may choose a higher thermal load, thereby reducing the volume of the furnace. Heating surface due to contamination, slagging, there is no problem of wear, can use a higher-speed cigarette, to reduce the size of the convection heating surface. Reasonable arrangement convection tubes, so that the capacity of the gas boiler with gas boiler more compact structure, small size, light weight, reduced investment in equipment significantly. Why is it so popular environmental protection boiler
Natural gas fired boiler is an inevitable trend of biomass transformation of straw pellet machine wood biomass combustion boilers has become an inevitable trend, as people's environmental awareness is gradually improving, countries and relevant departments of environmental protection and energy conservation incentives gradually introduced, burning reconstruction of coal boiler to a biomass fired boiler has become an inevitable trend. It is reported that wood biomass straw pellet production line capable of dispersing straw, wood and other raw materials processed into biomass burning particles, biomass fuel boilers provide a rich fuel, thus contributing to the transformation of enterprises biomass combustion boilers. Due to the strong state support, biomass burning particles as an alternative to coal, it has become China's fourth largest energy. British co-promote the use of wood biomass straw particle machine production lines, the production of biomass burning particles is greatly improved, greatly facilitate the process of enterprise biomass burning boiler in China. The increase in coal-fired boiler flue gas heat recovery steam recovery and necessary, and grate and transform a simple drum cited the wind, it can become a biomass wood pellet machine straw biomass pellet fuel biomass combustion boilers. While coal-fired boiler will increase business costs, but in the long run, the interests of biomass fuel boiler to the enterprise is immeasurable. With the contraction of the national policy on coal mining, the market price of coal is gradually rising. Biomass, straw wood pellet machine sufficient feedstock biomass particles, low processing costs, the use of biomass boilers, direct year savings of 5-10% in fuel costs. It is understood that use coal-fired boiler, the desulfurization necessary intervals, the biomass particles fuel sulfur content is extremely low. This complete abolition boiler desulfurization costs, reduce operating costs. Biomass fuel fired boilers can be exempt costs 80 yuan / ton; subsidies can help apply alternative fuel fired $ 200 / ton (NDRC); Also, according to the case of application of various energy saving MEP technological sector, the Ministry and other subsidies; where if a higher corporate income tax, then the application of biomass wood pellet machine straw biomass fuel particles can win policy tax shelters.
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