lignitous coal fired hot water boiler
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% . 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.
How much gas steam boiler power and water consumption about? One ton of steam coal boiler is about 85 kilograms, a ton of steam consumption of natural gas is about 80 square. I do not know the local fuel prices. Meanwhile, steam boiler tons of gas consumption to about 7 degrees, and tons of gas boiler steam power was insufficient. This is the cost of consumption, you can according to the local point, calculate the cost of coal. Other aspects of superior gas or gas, such as environmental protection, operating environment, repair and maintenance.
Since 2019, Taiyuan continue to adhere to the principle of priority to improve air quality, in order to significantly reduce heavy pollution weather as the main direction, ongoing action to combat air pollution, management depth to promote coal-fired boiler to achieve 35 tons of steam coal-fired boilers "clear zero".
In accordance with the gas will change, given the need for, after the first stand broken, do not break the principle of non-stand, Taiyuan will continue to carry out the transformation of rural areas, clean heating, heating is expected to complete the transformation of 30,000 before the end of October, the city's rural areas clean heating coverage rate reached 70%.
To reduce coal pollution, coal-fired boiler will also promote the in-depth treatment. October 1, seven more than 65 tons of steam coal-fired boilers and ultra-low emissions completed the transformation. Seven out of 35 tons of steam coal-fired boilers to achieve 35 tons of steam coal-fired boilers all clear.
In the region of the pollution control aspect, the binding improved air quality requirements, the complete electricity instead of coal, coal gas for generation of clean alternative energy area, included in "ban on coal zone", the implementation of joint sheet control. Meanwhile, to further increase the intensity of investigation ban within the "ban on coal zone" small coal-fired facilities, enhance the level of protection clean heating, ensure clean heating effect, and resolutely put an end to bulk coal burning complex, consolidate the "ban on coal zone" construction achievements.
In terms of market control, prohibit the use of more than 1% sulfur, ash than 16% of the civilian bulk coal. Before the end of the civil bulk coal sampling of coal sales business monthly coverage rate of 10%, annual sampling coverage of 100%. Investigated sales of low quality coal units and individuals in accordance with law, concentrate on cleaning up, straighten, banning non-compliance bulk coal supply channels, to crack down on the use of low-quality coal sales behavior, non-coal washery slime, the coal into the civilian market.
6 tph WNS series condensing gas-fired steam boiler project for printing and dyeing industrySteam boilers provide heat source for dyeing, drying, slashing and printing in printing and dyeing industry. Nantong New Dunhuang Dyeing Co. LTD. has always been providing excellent products and after-sales service to customers for the 16 years' constant development, main business including: yarn bleaching and sales, sales of carpet and garment fabrics and decoration cloth. As the state is promoting the substitution of small gas-fired boilers, Nantong New Dunhuan decided to introduce one set of gas-fired steam boiler with sufficient output and high efficiency. A set of high-quality boiler is essential for a dyeing and printing enterprise, which can not only enhance productivity but also reduce operating costs. After some market research, Nantong New Dunhuang chose ZOZEN as their cost-effective boiler supplier. In the process of technical communication, New Dunhuang spoke highly of ZOZEN professional degree and ordered one set of 6 tph WNS series gas-fired steam boiler (WNS6-1.25-Q). This series of boilers is ZOZEN's own R&D and has good reputation in the market with excellent product performance. It has wide fuel adaptability, applicable to a wide range of fuels including natural gas, methane, coal gas, diesel, heavy oil, light oil, etc., It adopts a large-diameter corrugated furnace to ensure the completed combustion, along with a low NOx burner, the NOx emission can be controlled below 30mg/Nm3. The boiler features automatic and safe operation, can automatically adjust and protect the combustion condition, water level, temperature and steam pressure in the course of operating. ZOZEN also installed the condenser, economizer for the tail flue, which would recycle the flue gas and decrease the exhaust temperature below to 60 degrees. The thermal efficiency is as high as 98%, which is higher than the same products in the market.