china coal fired hot water boiler prices

china coal fired hot water boiler prices

Comparison on electric boilers and gas boilers analysis that is both: a wide range of aspects of the early vote gas than electric boilers cheap, how much detail should be distinguished from gas boiler brand size, with or without condensate recovery and technical maturity of all determine the price of gas boiler; brand electric boiler, the applicable type, excellent technology, quality products; create two related conditions, such as plumbing, gas station; select high and low voltage electricity, create distribution and so on. If you choose gas boiler, gas pipeline itself, it does not demand an opening fee (usually about opening expenses 100 000), if the price of natural gas at a relatively high number, it is uneconomical, though you used to buy a cheap gas boiler, but all the cost is still reasonably high, and the gas boiler full of danger, high demand for security measures. If you choose electric boiler (that is, the kind of electromagnetic boiler instead of electric heating), capital of electromagnetic boiler itself is relatively high, after all, is a product of modern, high-tech, itself is not high-tech gas-fired boiler. If a region of relatively cheap price, it is highly recommended to use electric boiler. Plus electric boiler is the new environmental protection equipment, all kinds of pollution does not occur is in line with the development trend of the times. Fully automated equipment, personnel do not need guards. Calorific value gas in a wide range of heating season / purity of non-compliance (even if the contract explicitly re-appointment), and the calorific value of more basic electrical 1: 7, the proportion of LNG to be higher, lower coal bed methane (calorific value is multiplied by the thermal efficiency of the device ). In this case, saving electricity than gas about 1/3, according to the grapevine, is expected this year, Liaoning low power dropped to less than 0.3 yuan (business), that electricity than gas savings will exceed the estimated half. Other regions such as Xinjiang, Inner Mongolia, are relatively low price, is very suitable for power boilers. It covers an area of ​​respect, if the gas to create a gas station, then it must be a space-saving electric boiler and electric boiler is the basic module assembly, covers an area of ​​very little, according to the actual situation; and gas boiler explosion venting port and must demand of security area. Natural gas boiler manufacturers comes from the power point of view, electricity is no waste, waste gas, waste water, renewable power, gas emissions is still there, petrochemical and power is not renewable, although countries in the generosity of view, the price decline in space more large, but also more conducive to the use, in particular, Valley electric. Ultimately, if it is 30 000 m2 of non-continuous heating conditions (such as schools, shopping mall, office, public venues, factory, warehouse, etc.), advocated choose electric thermal storage boilers, the best choice for 10kv high voltage device, you can save some investment, and the province as well as policy. But if the area is less than 10,000 m2, the election 0.4kv low-voltage equipment is also good. Equipment and electric boiler is automatic operation, do not need special duty, usually around six meters do not consider lifting frame height coefficient, the heating time can be self-control, these areas are relatively municipal district heating is also very advantage. So gas boiler and electric boiler has its own advantages, depending on the actual situation in each region to decide, but to distant viewpoint in terms of selecting the electric boiler is still relatively cost-effective. In recent years, due to air pollution, coal-fired boilers were fire. Gradually immersed in people's day sideways fuel gas china coal fired hot water boiler prices. But coal-fired hot water boiler fuel to bring our lunch together, but also brought us a little problem. That's hot water boiler should be how to maintain? Below small way to tell us hot water boiler maintenance: 1, according to the water quality around, once every six months cleaning operations, the eradication of hot water boiler scale, otherwise, simple convection tube fouling, resulting in convection duct obstruction and burn. 2, if found suction force reduction furnace, the furnace should be cleaning, the furnace door, or in the neck of the chimney with a rubber hose running water flushing. Scale furnace can be opened to eradicate the use of at least 1 year after the manhole survey scale thickness, plus cleaning detergents, can also be added 5-10kg caustic soda or hydrochloric acid 24-36h, add boiling furnace furnace cleaning wash. 3, the operation of the boiler water or hot water to stop the combustion of dry, to avoid the formation of disturbances, severe dry furnace if found, immediately interrupted heating boiler After cooling, to identify the reason, troubleshooting. Must not the temerity to add water, avoid cracking furnace hit. 4, when the winter shutdown, it is necessary to put the net water furnace, hot water boilers to avoid freezing. 5, when the summer without hot water boiler, furnace should put the net water, dry curing with lime. 6, hot water boiler operator skill necessary to operate, grasp the hot water boiler functions, procedures and processes, to eradicate illegal operation.

For the continuous improvement of the province's environmental air quality, enhance people's happiness index, Henan Province Government Office issued the "2019 campaign of air pollution control implementation plan." Details are as follows.

1, to carry out special treatment industrial furnaces

Based on the melting furnace, the melting furnace, sintering machine (furnace), roasting furnace, a heating furnace, heat treatment furnace, a drying furnace (kiln), coke oven gas furnace 9 categories, to carry out an intensive investigation, the establishment of industrial furnaces Details inventory management, enhance the implementation of classification regulation. Not included in the investigation of industrial furnaces list, all included in the autumn and winter peak load shifting discontinued inventory.

2, to carry out clean alternative

Of coal, petroleum coke, residual oil, heavy oil as the fuel of a heating furnace, heat treatment furnace, a drying furnace (kiln), and actively promote the use of natural gas, electricity and other clean energy and the use of plant waste heat, heating power plant and the like instead.

3, to carry out comprehensive improvement of industrial boilers

Before the end of October 2019, in addition to undertaking tasks and will not have the alternative livelihood conditions, the province's basic complete 35 steam tons / hour boiler clean energy transformation or removal of coal-fired. Transformation methods include the removal, an alternative central heating, gas coal, coal to electricity, use geothermal, wind, solar, biomass with a bag filter. Chaigai on schedule to complete the coal-fired boilers, based on 40,000 yuan / tons of steam prize money up. Forbidden to use has been shut down and eliminate waste coal-fired boilers to cash rewards and subsidies.

4, strengthen upgrading gas-fired boiler

Before the end of October 2019, the provincial municipality and county (city) district built more than 4 tons of steam and low nitrogen gas boiler complete transformation after transformation, soot, sulfur dioxide, nitrogen oxide emissions are not higher than the concentration of 5,10,50 mg / cubic meter.

5, strengthen upgrading oil-fired boiler

Before the end of October 2019, the provincial municipality and county (city) district built more than 4 tons of steam and fuel (including alcohol-based fuel) boiler low nitrogen complete transformation after transformation, soot, sulfur dioxide, nitrogen oxides emission concentration is not high in 10,20,80 mg / cubic meter.

6, vigorously promote urban central heating

Full use of existing resources and central heating facilities, the existing large-scale heat sources and central heating pipe network in the area, in-depth investigation heating demand, and promote the rich heating capacity extends to reasonable radius and root out the potential heating, heating reduce blind spots. Before the end of October 2019, Zhengzhou, Anyang, Jiaozuo, Puyang City, built-up area of ​​central heating penetration reached more than 90 percent, Xinxiang City, central heating penetration reached more than 85%; Luoyang, Xuchang, Jiyuan City, central heating penetration reached 3 more than 80%; Sanmenxia central heating penetration 75% or more; unsealing, Pingdingshan, Hebi, 4 Zhumadian City, central heating rate of 70%; Luohe, Shangqiu, Nanyang 3 City central heating penetration reached 60% .

Details of operation of the boiler details chemical energy chemical energy Note 1 Note that operation of the boiler, fuel delivery is controlled with respect to the thickness of the layer of coal-fired boilers, the actual operation, the particles of different sizes on the same coal seam, unreasonable distribution, uneven ventilation, combustion is not uniform. The method can be employed uniformly stratified combustion to coal, to improve seam incomplete combustion: first administration of large particles of coal in the lower layer, the upper layer after administration minimal, large particle surface area of ​​small particles of coal, the need to burn a long time, this time is in the air the highest concentration of oxygen lower position; the other hand, small particles of coal on top, large surface area, a low oxygen concentration, full use of excess air. 2, the flow regulating damper excess air ratio is too large, a large loss of smoke; excess air ratio is too small, incomplete combustion loss is large, and therefore need to properly regulate the air flow to minimize loss of two or more. Usually in the flue gas analyzer backpass smoke, the control amount of wind of carbon monoxide is reduced to a reasonable value. For unconditional for gas analysis, empirical judgment by the naked eye can see the flame in the furnace, the flame pale described excess air amount; brown opaque flame, smoke black smoke indicates incomplete combustion. 3, there is a 1mm thick scale surface water quality management experiment boiler heating surface, waste of fuel from about 3% to 5%, in the presence of 3mm thick scale, waste of fuel of about 5% to 10% [3]. Water two general steps: pre-treatment, ion exchange or reverse osmosis. 4, cleaning blowdown gray scale or fouling deposition in the heating surface, increased heat resistance, reduced heat absorption wall, to improve the furnace exit gas temperature, boiler output decreased, but to increase the amount of cast coal, causing furnace exit gas temperature further improve a vicious circle. Therefore, timely cleaning clear dirt is particularly important. 5, the energy efficiency of the heat insulation testing industrial importance boiler showed small boiler in the case of good thermal heat radiation loss is about 3%, if the wrong selection insulation material, the thickness is too small, or even damage, does not include local heat, heat losses will be higher, the boiler has been running, has been caused by waste heat into the air. When the shutdown check whether the furnace wall insulation bricks off; isolated brick flue check is complete, to avoid shorting the flue gas; outer portion boiler, steam pipes and other insulation damage to be repaired; when heat insulation, low thermal conductivity of the material ( i.e., materials with good thermal insulating properties) on the inner layer having a better thermal insulation effect; respond to the economizer outer insulating layer for laying under conditions permitting. 6, to solve the problem of air leakage air leakage boiler boiler unit during operation is a common problem, the need to ensure the tightness of the boiler, furnace air leakage above all, do not close the site to check the furnace wall, door, inspection holes, etc., can be candles law, candles near these places, to observe whether the candle flame inward deflection to judge. Second leakage tail heating surface, the flue stack leakage mostly welding cracks, elbow bend, the expansion joints wear wear; mostly air superheater corrosion or wear leading to leakage through the pipe, the boiler shutdown should focus an examination.

Today, the principle of steam boiler and the construction of steam boiler too many forms, take an ordinary fast-packed 4-ton steam boiler. Water is heated into steam in the drum and heat is emitted by fire in the furnace, which is the principle of the steam boiler. Say the boiler first the pot. The boiler is a drum boiler with water cooling. Two return pyrotechnic tubes are arranged in the left and right parts of the drum, and the front cigarette box in the front part of the drum is turned back. Between the drum and the bottom box, there is a drop tube and a water-cooled tube, forming the frame of the combustion chamber. There is a steam separator on the top of the drum to reduce the water produced by steam. The heating surface of the boiler body is the lower part of the drum, the water-cooled pipe and the Pyrotechnic pipe The combustion part is composed of a chain grate and a drive device, and a combustion chamber composed of a boiler rack on the grate frame. Surrounded by refractories. Coal from coal hopper, there are coal gate to control the thickness of coal seam while sealing the front of the air. The lower part of the combustion chamber is the place where the blast enters, and this kind of boiler has great resistance and needs forced blast. Cinder, discharged from the back of the grate through hawk iron and sent out of the furnace by the slag extractor. From the back of the boiler, the flue gas goes forward from the first return pipe of the boiler, the second return pipe returns to the rear part of the boiler, and then goes into the dust collector to separate the ash, and then through the draught fan, it is discharged from the chimney. The induced draft fan not only discharges smoke, but also It is necessary for the negative pressure operation of the boiler. Essential water level gauges, pressure gauges, safety valves, thermometers, electric pumps that can replenish water under pressure, and steam pumps that can also be used in the event of power outages. Boiler water must be softened and water treatment equipment. Steam boilers are force vessels and safety devices are necessary. All steam boilers can work better only in accordance with the correct operating methods.

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