gas condensing water tube hot water boiler prices

gas condensing water tube hot water boiler prices

Method for implementing energy saving and environmentally friendly features a method of environmentally boiler boiler: the boiler flue gas heat recovery boiler is an important way of saving large flue gas calorific value, only the latent heat of vaporization of water vapor is sufficient to boiler feed water is preheated to above 100 ℃ not only can be used for boiler feed water, the excess water can also be used to heat domestic hot water. Fuel, boiler exhaust gas heat loss of about 8% to 16%, about 1% heat loss sewage, furnace heat 1 to 2%, 1% incomplete combustion, effective utilization of heat of about 80% to 91%, the flue gas includes N2 accounted 68%, Co211%, H2O16%, O24%, SO22PPM, NOx80PPM. If the exhaust gas temperature of 200 ℃, high total heat recovery through the heat exchanger, flue gas temperature can be lowered to 70C or less, the boiler feed water to raise to 20 ℃ 85 ℃, saving a lot of energy. Meanwhile, since the oil and gas, especially natural gas sulfur content less, the content of SO2 in the flue gas is very low, most of them are dissolved into condensed water discharged flue gas, the combined flue gas heat recovery devices are made of stainless steel, to ensure a reliable means corrosion resistance, and therefore the service life of the entire device more than 5-6 years. By monitoring, the indicators have reached the national environmental standards. Environmental regulations described boiler drum assembly welds should be: the drum longitudinal and circumferential weld head assembly or assembly welding seam characteristics weld two elements should satisfy the following requirements: the longitudinal weld seam or stitching head deviation of the actual edge on both sides of the steel sheet is not greater than 10% of the nominal thickness, and not more than 3mm; when the thickness is greater than 100mm, of not more than 6mm. Deviation of the actual edge seam on both sides of the steel sheet ring is not greater than 15% of the nominal thickness plus 1mm, and no greater than 6mm; when the thickness is larger than 100mm, no more than 10mm. Two abutting element or plate have different thicknesses and the edge of the book cut, treated according to the same plate thickness, the above-described nominal sheet thickness means; butt plate of different thicknesses, but with no thinning, the nominal thickness of the aforementioned finger planks . Any difference between the maximum inner diameter of the same cross-section and the minimum inner diameter of the drum should be not more than 1% of the nominal inner diameter. Angularity drum longitudinal seam should be no greater than 4mm. If the pressure detecting element via a weld joint defects found unacceptable, welding unit shall find out the reason, the development of a viable repair program to rework. Before welding defects should be completely removed. After welding, welding zone should be done appearance inspection and nondestructive testing. Heat treatment after welding element requirements, should be done after the welding heat treatment after welding. Rework the same position should not exceed three times. Repair parts, frequency and circumstances shall be deposited in the boiler repair product technical file.

Boiler water in what is related to a question of hard water and gas boilers: issues related to the boiler, in fact, there are many, but, that is what we all need to know and grasp, because it is in the boiler knowledge system, if not very good grasp, then, it will affect the learning process, but also will affect the use of the boiler, so we should take seriously and carry on. So, without further ado, immediately to proceed with it, its details are as follows. 1. boiler water, how it is called hard water? Boiler water, which generally contain impurities, mainly those of calcium and magnesium salts and the like. If its hardness is more than 8 degrees, which was called hard water, and then use it easily form hard scale in a boiler, thus, increases the energy consumption of the boiler. Therefore, it should be resolved, and to avoid this problem. 21 000 kcal boiler is equal to how many tons? In addition, the boiler heating pipes froze, how to solve? 1,000,000 kcal boiler, which is equivalent to 1.7 tons of boiler, because 600,000 kcal equal to 1 ton, therefore, will have this conclusion. The boiler heating pipes froze, its solutions, mainly in the following several, it is as follows: a measure: low temperature boiler operation, by gradually increasing its temperature to thaw naturally. Measures II: the use of fire, welding, or the use of liquefied petroleum gas were roasted. Three measures: the use of electric heating or hot water pouring to thaw.

Water temperature increase impact on the thermal efficiency of the boiler? A: The water temperature to improve thermal efficiency of the boiler can be divided into two cases to discuss. The first case, assuming constant evaporation boiler. When the water temperature increase, due to the economizer heat transfer temperature difference is reduced, reducing heat absorption, enhance the tobacco temperature economizer, air preheater temperature and pressure increase, increase heat transfer, the hot air temperature increased slightly, smoke the temperature rises, so that boiler efficiency is lowered. However, after the water temperature increase, increase in the heat for evaporating the evaporation increases. In order to maintain unchanged the amount of evaporation, it is necessary to reduce the amount of fuel, which makes the exhaust gas temperature is lowered to improve the thermal efficiency of the boiler. Because of these two factors on the thermal efficiency of the boiler roughly, therefore, when the constant holding evaporation boiler, the thermal efficiency of the boiler feed water temperature increase substantially unchanged. The second case, assuming that the same amount of fuel. After the water temperature increase, decrease temperature and pressure economizer, economizer flue gas temperature, increasing the air preheater heat absorption, the exhaust gas temperature rises, reduce the heat efficiency of the boiler. Since the hot air temperature is increased, the furnace temperature increases, water wall heat absorption increases. After the water temperature increase, the heat for increasing the temperature is reduced, while increasing the amount of heat for evaporation. Therefore, the water temperature increase, if the fuel quantity constant, the increased evaporation, but the thermal efficiency is lowered. To sum up, raise water temperature, evaporation is kept constant regardless of the amount of fuel still remains the same, we can not improve boiler efficiency. However, to improve the water temperature, it does improve the thermal efficiency of the plant cycle, thereby reducing the coal consumption.

"Coal to gas", "coal to electricity" is the trend in recent years of China's reform boilers, all regions are gradually improving. But because some areas coal to gas, coal to electricity-related project has not been completed, the pipeline can not be normal delivery of natural gas and electricity, but there can not ban the use of burning coal for heating, resulting in some of the people cold.

Under Thus, this year, Hebei Province, will carry out the inspection work cleaning heating dragnet, scheduled for November 1 to 10, requires each village and household dragnet inspection, the gas supply, power supply is not guaranteed to get the premise not allowed to first dismantle heating stoves.

Inspection team is more than 2,000 people drawn from the province's environmental protection system, divided into 120 large groups, each group of sub-1-2 large counties (cities, districts), take the main city limits off-site inspection, cross-check each other, such as thorough investigation way, a comprehensive understanding of coal to gas, coal to electricity and clean coal work on behalf of the double security for the situation.

Wherein, the village 500 (cell) is not less than 20% of households checks; 500 villages and above (cell) checks no less than 10% of households. The main inspection five aspects, including: gas supply, power supply security, security for the clean coal and distribution, development of contingency plans, etc. under extremely adverse weather conditions. In gas supply, power supply is not guaranteed under the premise, the focus in advance to see if the removal of heating stoves situation.

Environmental Protection Department official said earlier this year in northern clean heating to proceed from reality, insist on the need for constant, the gas will change to ensure that clean heating and warm winter are guaranteed.

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