Material: ????? Capacity: ?,???,??? ??????? ????? ????: ?????? ????: ??? ??? ????
Equipment: ??????????? ??? ????-???????? ????? ? ??? (?????? ???), ????? ?????, ?????, ???? ??????, ???? ??????, ??????, ??????? ? ????????? ??????? ?????????
The energy company is a research and development base focusing on the efficient and clean use of coal in Shandong Province. The technology of micro coal atomization, its result of independent research and development, can boost the transformation and upgrading of coal industry effectively. The so-called micro coal refers to the coal powder meeting the standard of fineness after coal is ground by mills. Through the technology of micro coal atomization, the fuel can mix with air fully to form a rotary vortex and then the fuel enters the industrial boilers and burns in suspension inside. The use of thermal system, monitoring and controlling system and exhaust purifying system achieves the efficient combustion with emissions reaching the emission standards of gas. Except for the increase of input-output ratio, the clean coal production using our 4 MTW215 European Mill (Secondary Phase) and other auxiliary machines has greatly reduced dust, SO? and nitrogen oxide emissions.
According to the report released by China National ????? Association, over 70% coal companies are suffering financial losses. The severe situation of coal industry makes transformation and upgrading urgent. So, under the premise of controlling coal consumption, how to increase economic profits of traditional coal firms, how to use coal resources efficiently and cleanly and how to reduce environmental pollution incurred by coal combustion have been common problems among coal companies.
??? ????????? ????? ????????? ????????? ?????? ????????? ??????, ??% ????? ??? ????? ????????? ?????? ?????? ???? ????????? ????????? ??? ? ?? ???????? ?????? ?????? ?? ??????, ????? ????? ???????? ????-?????? ????? ? ???????? ????????????? ?????? ????? ?????? ????? ? ?????? ?????, ????????? ??????? ???? ????? ??????? ? ?????? ????????? ??????, ????? ???????? ?????????? ?????? ?????? ??
(?) ????????? ????????? ??????The Action Plan of Clean Use of ????? (2015-2020) released by China National Energy Bureau clearly stipulates that by 2020 the use ratio of efficient boilers must reach 50% at least in some areas. According to the fifth plenary of CPC's 18th Central Committee, the clean use of fossil energy must be put on the schedule, coal included. So it can be concluded that the promotion of efficient and environmental coal powder boiler will be a key energy-saving technology in China.
(?) ??????? ??????? ?????To stimulate transformation and upgrading, Shandong government subsidized some major PPP projects. Meanwhile, Shandong province launched an action plan (2015-2018) to promote efficient and environmental coal powder boilers. The plan shows that efficient coal powder boilers can be used for heat supply and steam supply, so such boilers should be popularized and applied as soon as possible.
(?) ????????? ????Using coal briquette as the fuel, traditional industrial boilers discharge a great deal of dust and contaminant. However, the use of coal powder makes the local area free from pollution with all emissions below the national standards. The emission of dust is ≤30mg/m3, SO2 ≤100mg/m3, nitrogen oxides ≤200mg/m3.
(?) ????? ?????? ?????? ?????? ? ?????????? ????????The use of coal powder boilers can burn over 98% of coal powder. Meanwhile, compared to the traditional boilers, the coal powder boilers can save energy by over 30% while heat efficiency keeps above 90%. The operation costs can be reduced by 20-30%. What’s more, the unit fuel cost of coal powder boilers is only one third of that of gas boilers.
???????? ????: ?????????, ???
Equipment: ? ??? ????????? ??? ???????? ??? (?????? ???) ? ???? ????? ???????? ???????? ??????, ???? ???? ??????, ???? ??????,
Material: ?????
?????? ??????? ??? ?????
????? ????: ＜50 mm
?????? ????: 200 meshes, D80
Capacity: 1,000,000 TPY
? ??? ????????? ???????? ??? (??????? ???)
The complete system of MTW Series European Mills is advanced. The mill is equipped with the bevel gear integral transmission device, inner thin-oil lubrication system, and oil temperature monitoring device. Meanwhile, the mill boasts small land occupation, low total investment, low operation costs, high efficiency and environmental protection.
????? ????? ????????? ??????: ????? ???????? ???????, ????? ??? ????? ????, ????????? ???????? ???, ???? ??????????? (???????? ???? ???????????), ????, ???? ?????? ??????, ??????? ???????, ?????? ???????, ????
????? ???? ??????? ????? ????????
Firstly, air is compressed by air compressor. Then air enters the efficient oil remover where most oil, water and dust would be removed primarily. After that, the refrigerated-typed air dryer removes most moisture and the powder filter removes the dust. Then the air enters the air storage tank. After buffer, the air is sent into the nitrogen making machine filled with absorbents. Clean compressed air enters to the adsorption tower from the bottom and then the air diffuses under the action of air diffuser. In the adsorption tower, the oxygen and nitrogen would be separated and the nitrogen would be sent to the tank for storage.
When the temperature in the protection area exceeds the preset value, an alarm signal will be sent to the alarm controller, which then sends a command to trigger the alarm bell. So does the CO. When the content of CO is beyond the preset-value, the alarm starts to send signals to the audible and visual alarm. Then the alarm counts down for 30s. When it counts down to 0, the alarm will send signals to the CO2 fire extinguishing system which is started to extinguish the fire.
The pneumatic conveyor is mainly responsible for the transportation of coal powder. It can send the coal powder into the finished product bin from a long distance.
By using multiple communication technologies to read PLC or ECS data and collect equipment operation status, and by sending commands to control the equipment, the centralized control system can realize remote control, recording and analysis of machine operation, and print equipment operation reports.
Raw coal is fed by a quantitative feeder to the scraper conveyor, which then conveys coal to the dryer for moisture removal. Then the coal enters the closed storage bin via a closed scraper conveyor. The coal is then transferred to the raw material bin of the powder preparation system and fed into the MTW215 European Mill by a weighing coal feeder. After that, the coal powder undergoes classification, and then enters the powder collector along the pipe. The remaining air is collected by the pulse dust collector. The finished coal powder collected enters the elevator under the action of a spiral conveyor. Finally, the coal powder is elevated to the coal powder storage bin. If there is any need, the finished coal powder will be transported by the tanker. The complete set of this system is equipped with the nitrogen making system and CO2 system to avoid explosion and to extinguish the fire if necessary. Meanwhile, anti-explosive valves are installed at the key parts in avoidance of possible damage to the equipment.
To save construction time and investment costs, the coal powder preparation system took the ????? service. ????? service belongs to a turnkey service specially designed and offered to bring convenience to our customers. The service covers every and each stage of a project including the topographic survey, design of production line, test of raw material, the analysis of requirements on finished product, calculation of investment costs, installation of machines, and commissioning, etc. It helps customers avoid some unnecessary problems like the insufficiency of building materials and labor. ????? service makes the operation more convenient and it is available for those customers who need to put production into operation in a short time. BTW, this customer from Shandong spoke highly of our ????? service after he chose the service.
(?) ??? ???????To make the operation of the coal powder preparation production line easier, we took unique two-step method. Specifically, the two-step method refers to the solution that separates the drying process and the powder preparation process. The relatively cooler grinding cavity is the special technology owned by MTW European Mill. The system is simple and easy to be controlled, which guarantees the safe operation to some extent.
????????? ??????: ????? ??????? ??????? ???, ??????? ??????, ????? ????? ????, MTW ???????? ???, ???????? ???? ?????? ??????, ????? ?????? ??????, ????, ??????? ?????
(?) ?? ?????The MTW Series European Mill is equipped with the bevel gear integral transmission device, inner thin-oil lubrication system, monitor of oil temperature. Meanwhile, the mill boasts small occupation of land, low total investment, low operation costs, high efficiency and environmental protection.
(?) ???????? ? ?????????To ensure safe operation during coal powder preparation, the production line is equipped with a nitrogen generation system and a CO? fire extinguishing system to prevent explosion and fire accidents.
Meanwhile, some effective measures are taken to control the emissions. The content of dust meets the stipulated standards. The use of an advanced pulse dust collector reduces the negative impact on the surroundings.
????????? ????????-??????? ????
??????? ? ?????? ??? ???
???? ???? ???????????
The atomization of micro coal can increase the combustion ratio to 98%, the thermal efficiency to 90%. Besides, steam production can be increased from 5.5 tons to 9 tons. Compared to the traditional industrial boilers, the clean coal powder boilers can save coal by 30%, electricity by 20%, water consumption by 10%, floor space by 60% and labor force by 50%. The sales volume of clean coal powder reaches 800 million yuan, with profits tax of 100 million yuan.
?? ??????? ?????? ???????? ??? ??????? ????, ??????? ???? ????????? ??? ???????? ?????????? ??????? ??????? ???? ???? ??????? ??? ?????? ? ????? ????????? ????????? ? ????? ???? ??????? ????? ?? ??????? ??? ???????? ????? ???
All emissions meet the standards for gas boilers, contributing to environmental protection.
This clean coal powder preparation production line was large and the requirement on quality of coal powder was quite strict, so we were very careful when we chose the machine manufacturers. After various inspections and analysis, we chose ??????. From the site survey to the commissioning, ?????? offered us professional solutions and services. The 4 mills we purchased are running stably and the yield is beyond our expectations.
The key of this technology is atomizing micro coal by mixing it with the air vortex repeatedly. Mixing the micro coal (200 meshes) with the high-speed air vortex is the first step. The mixture will be sent into the boilers and burn in suspension there. The use of thermal system, monitoring and controlling system and exhaust purifying system achieves the efficient combustion with emissions reaching the emission standards of gas.
Through selection, drying and grinding, the micro coal used in the efficient coal powder boilers can become the powder (200 meshes). Centralized management and unified delivery not only ensure the quality of coal powder but also eliminate the scattered coal piles. The boilers are characterized by high efficiency, environmental protection, clean emission and high automation. Therefore, the promotion of efficient coal powder boilers plays an important role in clean use of coal, environment improvement and the growth of environment-friendly industries.
??????