Removing Ash Application of Biteman Modular-Units Dryer in Power Plant

Thermal power plant is a plant that using fuel (such as coal) as produce electricity. Fuel will generate steam via heating water when burning, then fuel’s chemical energy into heat energy, after that steam pressure can promote rotation of steam turbine, so heat energy into mechanical energy, and then the turbine drive generator to rotate, finally the mechanical energy into electrical energy. thermal power generation is the main force of modern social electrical development, biteman focus on considering the impact of electricity for the environment, non-renewable resources in the background of building a harmonious society, developing circular economy.





Compared with the hydropower plant and other types power plants, the layout of thermal power plant is more flexible, the size of installed capacity can determine as demand; short construction period, it usually is half of the hydropower plant or even shorter; the current coal consumption of power generation accounts for about 25% of the total coal production, coupled with coal costs and a lot of water, its production cost is 3-4 times higher than hydroelectric power; various power equipment, complex control operation of power generation unit, plant electricity and operating personnel are more than the hydropower plant, higher operating costs and so on.





Most of China's coal-fired power plants are low-grade coal, so high ash content is a common phenomenon. the annual emissions is tens of millions tons ash, it has brought great pressure to economic construction and environmental protection , so we must effectively deal with to ensure safe&stable, economical &environment friendly operation.


The traditional ash removal method has hydraulic ash, mechanical ash, etc., but there are many problems for the former, it’s easy to form dirt in the ash pipe, and block it, then it is difficult to remove, when ash contains high content calcium oxide ; it will show alkaline Mixed ash with ash removal water, then PH value exceed industrial "three wastes" emissions regulations, and it need high investment in equipment and operating costs regardless of recycle or treatment measures, so it can’t be allowed to casually discharge from the ash field to the outside.






Compared with above, pneumatic ash removal has a significant advantage, such as saving large amounts of water-rush ash and saving resources; avoiding the pollution of ash fields for groundwater and surroundings environment; there is no ash pipe scale and corrosion Problem; simple equipment, small occupied area, easy to arrange; convenient selection of transport route, flexible layout and so on. while compared with the mechanical ash removal, the power consumption is greater, the pipeline’s wear more serious; it a certain limit for transit distance and output.



Ash removal system has experienced three stage: from the initial negative pressure transmission, low positive pressure transmission to the positive pressure transmission. the aerodynamic source of positive pressure transmission begin to widely use air compressor, then ash gas ratio significantly increase, wear problems get improvement. In fact, air source pass through air compressor, gas storage tank, compressed air purification post-processing equipment (traditional twin tower adsorption dryer, refrigeration dryer, etc.) to the gas equipment, it will appear gas sources still contain moisture, oil, etc., which leads to the entire ash pipe blocking, wearing and other issues due to most dryers can’t make the gas source to meet the standards of required gas equipment at current market. when cleaning the gas source, making it achieve gas equipment standard, if you want to improve this situation.





At present, China mainly uses refrigeration dryer and adsorption dryer, outlet dew point range of refrigeration dryer is limited, the lowest temperature is about 2 ℃ due to 0 ℃ limit when water into ice. while -20 ℃pressure dew point value is their requirement for most gas equipment. that is, its purification effect is almost zero at many moment. But the outlet dew point of adsorption dryer can reach -20 ℃ to -100 ℃, it can much more meet the requirements for most gas equipment.






In the field of adsorption dryer, as biteman modular-units adsorption dryer of world's first innovation modular-units technology, its pressure dew point undoubtedly can reach at -70 ℃, and new type isodiametric adsorption system makes utilization rate of adsorbent rising to more than 60%; sieve-type decentralized convection design makes the gas source evenly pass adsorbent layer and no adsorption dead angle; unique modular-units structure makes it easier replace adsorbent, no need to filling on site; Vacuum negative pressure phenomenon makes it reaching 80% or more for the instantaneous discharge desorption rate.






Obviously, for ash removal effect of power plant, biteman modular-units adsorption dryer not only can more easily improve existing problems, but also save more costs for power plant and more favorable for environmental protection.


Believing biteman, it not only quickly resolve the issue of power plants, but also allow power plants to go further. they choose biteman to actually solve the problem for removing ash of power plants, it can bring benefits to them. believing is choosing!