Recently, Pingliang City, issued the latest "Pingliang City to win the Battle of Blue Sky 2019 annual implementation plan," we can see, Pingliang City, determination and efforts for the improvement of the atmospheric environment. Details are as follows.
First, in an orderly clean winter heating. Seriously implement the "Pingliang City winter heating clean overall plan (2018-2021 years)," according to an alternative clean, affordable, affordable residents principle, using a combination of all types of cleaning of heating, substitution of coal for heating. Full implementation of national, provincial and clean energy heating prices on northern policy support, accelerate the clean heating work.
Second, continue to promote the comprehensive improvement of coal-fired boilers. On the area of coal-fired boilers comprehensive investigation, according to "a furnace of a policy" requirements, to promote the comprehensive improvement of precision work. Increase efforts to eliminate small coal-fired boilers, the county level and above urban area per hour and 10 tons of steam coal-fired boilers and pantry oven, stove operating, grain storage and drying equipment, coal-fired facilities out rate of 60%, principles the 35 tons of steam per hour, no new coal-fired boilers, in principle, to the rest of 10 tons of steam per hour, a new coal-fired boilers. Dispersing the concentrated coal-fired boiler heating pipe network grid should be eliminated, the coal-fired boilers and gas dispersion pipe network should be implemented under the premise of coal to gas in the implementation of the air supply and gas supply; central heating and no gas pipeline network coverage area scattered coal-fired boilers, energy saving and environmental protection in line with national requirements, compliance governance reform can be implemented smoke, does not meet the requirements, it should be replaced by electricity, alcohol-based fuels and other clean energy; industrial Park (zone) press the "one District one heat source "requirements, an orderly phase-out of demolition and decentralized heating boilers; in remote rural areas, affected by economic and other conditions can not be eliminated or temporarily restrict use clean energy alternative to coal-fired boilers can be taken to use clean coal and other ways to achieve the flue gas discharge standards.
The inlet speed of gas-fired hot-water boiler before start-up should not be too fast, usually no less than 4 hours in winter, and 2-3 hours in other seasons, especially in the initial stage of water intake. The inlet temperature of a gas-fired hot water boiler is generally 50 °C, so the difference between the feed water temperature and the steam wall temperature in the drum is less than 40 °C. For gas-fired hot water boiler, the inlet water temperature can be equal to that of steam drum wall without complete cooling, otherwise the inlet water speed should be slowed down. When feed water enters the drum, it always first touches the lower part of the drum. If the difference between the feed water temperature and the drum wall temperature is too Large, the inlet speed is fast, and the upper and lower walls of the drum, the inner and outer walls will have a large expansion. Bad, on the drum caused a lot of additional stress, resulting in drum deformation, serious cracking. Due to the thickness and slow expansion of the drum wall, the tube wall connected to the drum wall is thinner and expands faster. If the inlet temperature of the gas-fired hot water boiler is too high or the inlet speed is too fast, the expansion will be uneven, the welded joint will appear cracks and the gas-fired hot water boiler will be damaged. The inner diameter of the decompression tube is usually φ 7~13mm (water and steam), and its length should not be too long (< 60m). Straightness of pressure pipe If the diameter is too small and the length is too long, it will affect the dynamic transmission of pressure measurement and increase the dynamic error. The inner diameter is too large to be easily maintained and installed. Pressure pipes should not be placed in the horizontal part to prevent the accumulation of bubbles (when measuring liquids) and water columns (when measuring gases). The pressure tap shall be perpendicular to the flow of the medium. Pressure faucet must not have chamfer, flange and burr. When measuring the hydraulic pressure of an electrically heated china industrial steam boiler, the pressure outlet should be removed from the lower part of the pipe to prevent the gas in the liquid from entering the pressure guide pipe; When measuring the gas pressure, remove the pressure splice from the upper part of the pipe to prevent dust and dust in the gas The droplets enter the ignition line. The installation site of the electric heating steam boiler pressure gauge (pressure transmitter) should meet the environmental conditions (temperature, humidity, vibration, etc.) used by the instrument, and should be easy to observe, repair and ensure safety. Insulation should be laid on pressure pipes in high temperature media to avoid burning during flushing. Pressure lines are equipped with needle valves (for cutting off pressure in the event of pressure line failures during operation), auxiliary needle valves (for use with instruments, stopping, replacement), condensing coils and elbows (isolation elastic elements from high-temperature media), Easy to install sealing gaskets) as well as sewage valves and sewers. For special pressure measurements, it's still pressing. Install discharge valve, isolation room and so on in the force pipe.
How staged combustion boilers and boiler manufacturers to understand the relationship between the boiler and gas consumption of the equipment, from the current point of view, it is a wide range of applications and there are many types, and also one of the main keywords of the website in important product, so there is necessary to conduct a comprehensive knowledge and understanding, so as to know how to correctly and reasonable use of the product, and at the same time, there is a good use of effects in the use of the product. 1. How can the afterburner boiler to understand? Afterburning boiler is understood, one can be understood as a waste heat boiler, waste heat boiler because the band is divided into afterburner means and without afterburner means two; two is considered to be carried out at temperatures not meet the needs of a supplementary device, to supplement the heat to meet the temperature requirement. So, specifically how to understand, but also the actual situation, to decide it. 2. Are there different boilers burning different method? Boiler, which there are many types, such as coal-fired boiler, gas boiler, boiler methanol, the electric boiler, and different kinds which are different corresponding to different media, and firing method. So, we can draw the conclusion that the answer to this question is yes. And even the same kind of boiler, if it is different manufacturers, then, will have different firing methods, so that the boiler burning method, which is also associated with two boiler types and manufacturers. 3. Check before use china industrial steam boilers Is it important? Steam boiler inspection before use, from a professional point of view, this is an important work, and can not be sloppy treat, but also need to know the specific content of the work. Its work on the content is as follows: the internal parts of the boiler inspection, such as pipes, pressure gauges and water level tables, etc. These, are intact and can be used normally. Also check to see if the water used in the boiler through a softening process is clean and clean, can not contain impurities, dirt and grease. 4. different boiler manufacturers, boiler air consumption the same? Boilers different manufacturers, then, boiler air consumption is not the same, but can not be exactly the same, but the difference is not great. On the considerations to take into account air source heat this one. Generally, the heat value of natural gas is 35 MJ / m, and the boiler gas consumption per ton of 70-80 m3 can be estimated, so that air consumption of the boiler is half a ton of 35-40 m3 / hr .
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.Free Chat
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