horizontal multistage boiler specification
Gas hot water horizontal multistage boiler specification safe operation of the precautions which the following are a few precautions and accident prone: a convection tube, water wall tube blasting reasons: l, substandard materials; installation does not meet regulatory requirements. The layered wall, does not reach the level of weld quality requirements, and other remnants of the inner tube. Wall causing local overheating and burn; 2, feed water quality does not meet standards. Resulting in scaling the wall structure, affect the heat transfer. And cause the wall temperature of the superheated blasting; 3, due to wear of fly ash. So that the wall thickness reduction; 4, fire shutdown heated too fast or too fast, so that the uneven thermal expansion of the tubes. Causing weld cracking; 5, the boiler load is too high, resulting in uneven burning and the outer tube squib severe coking and other reasons. Preventive measures squib: l, before the installation of the pipe rigorous re-examination, have welding welding process instructions; welding quality to meet the design requirements. After the pipe installation to test the pipeline through the ball, passing rate of 100%. 2, to strengthen the water quality management, a test class and demineralized water to achieve the water quality standards, regular inspection and regular elimination of scale and sewage; 3, water wall tubes and pipes to regularly check the exhaust convection, found deformed or thinned tube to be replaced, keeping in mind that the quality of maintenance, must comply with regulatory requirements; 4, the boiler can not work overload control (predetermined limit), attention furnace combustion process, the combustion to ensure homogeneous, stable; 5, note that the tube coking conditions. To achieve timely clear focus and pay attention to leakage. Second, the hot water boiler explosion: the explosion is very serious accident. Damage to equipment and buildings and heating systems are serious. And often resulting in casualties. Analysis following aspects: 1, design, manufacturing problems a poorly designed, the uneven distribution of traffic in each circulation circuit. Heat too much deviation, solder angular, square, flat plate structure, the steel does not meet the requirements; good manufacturing and repair process. In particular dismay welding quality cells prone to rupture; 2, boiler overpressure eleven operating pressure exceeds the allowable working pressure. Stress plate (internal pressure) higher than the ultimate strength of the steel sheet caused cracking. The main reason is the failure of a safety valve, pressure gauge malfunction, Station Gauges indicate the error. Operating personnel did not take appropriate measures. Not strong sense of responsibility caused; 3, superheated steel overheating burn broken, or too thick scale is mainly due to the water pan grease or other debris caused by blockage heating surface; 4, severe corrosion due to the corrosion by the inner and outer surfaces of the steel sheet the plate thickness is thinned, the strength of the steel sheet insufficient cause rupture; for the above reasons. Summarize a few precautions: l, for manufacturing defects in the design should take the following measures: First, reasonable design. Second, strict related materials, the preparation of three is correct manufacturing processes and process specification cards (including repair), to establish the necessary regulatory Fourth, Fifth, to improve the quality and sense of responsibility of the operators and managers; 2, to prevent overpressure . To ensure safety valve sensitivity and reliability. Regular automatic drainage time. Identify problems in time, also installed on a standard gauge for comparison. And regularly into the metering department inspection; 3, to prevent overheating. You must configure effective water treatment equipment and the establishment of the necessary rules and regulations. So that the boiler is not less furring furring and no accumulation of grease. To check the fouling situation boiler outage. If the scale. You must be promptly cleaned. Scale in order to avoid accretion; 4, preventing internal corrosion. Hot water boiler for larger capacity. The method uses thermal oxygen or chemical oxygen to resolve. In addition. To check the situation of internal and external corrosion. The extent of corrosion repair method such as pile up or Wabu according to (do this before the law, there must be approved by the technical units of the total work program and report to the local supervision departments boiler). To prevent the boiler explosion, regularly carry out the necessary checks on the boiler, at the same time, the boiler management departments should formulate effective measures, operators and managers must strictly enforce minor accidents occurred after the boiler shutdown for maintenance. Tell us about the repair of hot water boiler. 1, when the shutdown may not stop the pump immediately. To be checked after repairs boiler water temperature must be lower than the pump can be stopped when the 50 ℃, at the same time to turn off the water supply valves and heat supply network backwater valve and release the water pot. 2, before entering the boiler, the water must be emptied of all its boiler, sewage emptying all open. Manholes drum, hand holes headers have opened to air convection over time. To enter the interior work, you must pay attention: when someone is working inside. In certain drum outside a supervised. 3, before entering the combustion chamber or flue work. Ventilation must be taken, anti-virus, fire, explosion and other measures. And the total flue chimney flue or other operation of the boiler is connected to the gates are closed tightly. 4, voltage security lighting to use. If the flue inside the drum and more humid. Lighting voltage can not exceed 12V. If dry, the lighting voltage can not exceed 36V. But also have to do to ensure proper safety measures. Do not use open flame lighting.
When the horizontal multistage boiler specification used for bathing, we recommend configuration heat exchanger, first, to ensure the stability of the water temperature, maintaining a good bath effect; the second is to ensure the safety of bathing water, harmless to human body.
December 29, 2018, Yulin City, Shaanxi Provincial People's Government issued an iron fist rule on blue haze win the Battle of three-year action plan (2018-2020 years) (hereinafter referred to as the "Program").
That "plan", mainly to adhere to all the people cohabitation, source control, continued implementation of air pollution control operations, improve the city's air quality, determined to win the battle of the blue sky efforts. Details are as follows.
1, the construction of high-pollution fuel combustion zone ban. Deadlines have been designated high-pollution fuel combustion zone ban construction of combustion zone ban prohibits the sale, burning polluting fuels, a ban on new or expanded high-polluting fuel burning facilities have been built in the city and county governments should provide the within switching to natural gas, liquefied petroleum gas, electricity or other clean energy sources.
2, to further promote the bulk coal governance. Promoting rural residents, agricultural production, clean energy alternative to coal-fired commercial activities, take electricity instead of coal, substitution of gas for coal, and biomass, wind and solar and other clean energy alternatives.
3, accelerate the transformation of governance-fired power plants. Accelerate the construction of wind power, photovoltaic and other non-fossil energy electricity generation. Implementation of the provincial special program, shutting down vigorously eliminate environmental protection, energy consumption, security is not up to 300,000 kilowatts coal-fired units. Capacity to shut down the unit, coal consumption and pollutant emission targets to carry out a transaction or replacement.
4, prohibiting new coal-fired central heating station. New heating all use natural gas, electricity, heating Renewable energy (including biomass clean heating, solar heating, heating and other industrial waste heat), to give priority to distributed clean energy central heating, residential buildings do not have the conditions, you can access municipal centralized heating.
5, to carry out comprehensive improvement of coal-fired boilers. The city is no longer a new 35 tons of steam per hour of coal-fired boilers, 65 tons of steam per hour and above all coal-fired boilers and energy-efficient ultra-low emissions to complete the transformation. Increase the small coal-fired boilers and furnaces tea, operating the stove, grain storage and drying equipment and other efforts to phase out coal-fired facilities, phasing out 10 tons of steam per hour and coal-fired boilers. Low NOx combustion gas boiler to carry out the transformation. Before the end of 2020, the conditions of the conventional gas combustion boiler completed low nitrogen transformation, after transformation of nitrogen oxide emissions is not higher than 80 mg / m. Urban built-up area of ultra-low emission biomass boilers implement reform.
6, strengthen straw Jinshao main responsibility. To carry out special inspections straw Jinshao in the summer harvest and autumn harvest stage. Due to open burning of straw to prevent regional heavy pollution caused by the weather.
7, pin good job of storing system for gas production. Gas supply priority for city residents and substitute coal for heating in winter. "Coal to gas" adhere to the "gas will change" to ensure safe construction, safe use, and safety management. Orderly development of natural gas peaking power plants and other interruptible customers.
8, speed up the upgrading of rural power grids. Urban counties to formulate a work program. Power grid enterprises to co-ordinate the construction of power transmission and transformation project to meet heating demand for electricity residents. Encouraged to promote regenerative and other electric heating. Governments at all levels to "coal to electricity" project supporting grid should be given support, coordination "of coal to electricity," "coal to gas" land for construction.
9, improve energy efficiency. Continue to implement the action of the total energy consumption dual control and strength. Improve energy efficiency standards, develop, promote energy efficient technologies and products to achieve key energy industries, energy-saving equipment standard full coverage. New projects in key areas of high energy consumption per unit of product (output) energy consumption should reach the international advanced level.
10, to accelerate the development of clean energy and new energy. Optimization of wind energy, solar energy development layout. Where the conditions of availability of resources, to encourage the development of county biomass cogeneration, biomass briquette boilers and biogas.
Henan scale for gas horizontal multistage boiler specifications What are the dangers? 1.Henan gas boiler steel pipes such as burning due to overheating is the junction has a scale Henan gas boiler, but also to maintain a certain force (operating pressure and the amount of evaporation), which can increase the temperature of the fire side. Thus the thicker the scale, the worse the thermal conductivity, the higher the temperature of the gas boiler must fire side Henan. As can be seen from the experimental data obtained for a boiler operating pressure of 1.4MPa, the fire-side temperature is between 900 ~ 1200 ℃, the water-side temperature 197 deg.] C, the steel sheet temperature scale outstanding, only 215 ~ 250 ℃. When the same type of boiler, boiler scale mixing with a junction plate 0.8 to 1.0 mm, than the temperature of the steel sheet no scale height of about 134 ~ 160 ℃. When the sheet 20 reaches 315 # deg.] C, begins to decrease its mechanical properties, when reaching 450 ℃, it will creep due to overheating. Therefore boiler feed water treatment is not good, it is easy to knot Henan gas boiler caused by raw scale boilers burning metal. 2. When the output reduction Henan junction evaporated gas boiler water scale, the heat of the fire can not be quickly transferred to the water side of the side, it will reduce the boiler output. 3. The fuel waste gas boiler junction when there is scale, Henan, boiler output is maintained constant, it is necessary to increase the temperature of the fire side, thereby increasing the heat loss two: First, heat radiation loss to the outside world; one of the smoke heat loss. As the working pressure of the gas boiler in Henan, and the number of different fuel waste thermal conductivity and thickness of the scale is different. In general, the higher the boiler working pressure, the lower the thermal conductivity of the scale, the higher the scale thickness, the larger the amount of waste fuel. Tests show that for a boiler operating pressure of 1.4MPa, by mixing junction raw scale thickness of 1 mm, up to 8% waste fuel. 4. Increase Henan gas maintenance burden upon boilers plate or pipe junction raw scale, is very difficult to remove, in particular due to leakage caused by boiler scale, cracks, breakage, deformation, corrosion and other diseases, not only damage to the boiler, but also to spend a lot of manpower and material resources to repair. In this way, not only shorten the operating cycle, affecting work efficiency, but also increase maintenance costs. 5. shorten the life of the boiler and endanger security in accordance with the early tradition, for boiler feed water without softening the end of life scale most cases, the action is chemical cleaning, chemical cleaning increase the frequency and cause damage to the boiler, reducing the life of the boiler, increasing security risks . It is obvious from the boiler industry has always been a lot of accident data: accidents caused by scale, accounting for boiler accident ratio is very high, most provinces and cities in more than 20%. This will not only cause loss of equipment, but also threaten personal safety.