-
Anonymous users2024-02-16In the desulfurization technology, the fault handling methods of booster fan blade control include: inspection control system and servo motor; Check the operation of the hydraulic oil station. Check the condition of the adjustment arm and the adjustment drive.
The main reasons for the failure of the blade control of the Zengzhuang fan are: the failure of the servo motor. Low hydraulic oil pressure.
Failure of the regulating drive. The treatment method is as follows: check the control system and servo motor.
Check the operation of the hydraulic oil station. Check the condition of the adjusting arm and adjust the driving device. The design of the blades needs to take into account the requirements and coordination of other components of the unit, for example, the spacing between the tower and the blades is usually a reason to consider when designing the strength of the blades, and the main shaft and bearings also put forward requirements for the weight of the blades, if these parameters are not well considered, the blade design will reach the limit value.
-
Anonymous users2024-02-15Automatic control of booster fan. When the FGD system is operating normally, the increased resistance of the system is overcome by the booster fan. In the future, the supervision and operation of environmental protection facilities must be treated the same as the main engine, especially if the bypass is prohibited or the bypass operation is canceled, the FGD device and the boiler unit will be an inseparable large system, and the general booster fan and the induced draft fan are operated in series.
During the normal operation of the FGD system, if the output of the booster fan is greater than the resistance of the system, that is, the booster fan "helps" the output of the induced draft fan, and when the FGD system trips the protective booster fan, it will lead to a decrease in the negative pressure of the furnace. On the contrary, if the output of the booster fan is less than the resistance of the FGD system, that is, the induced draft fan "helps" the output of the booster fan, when the FGD system trips to protect the booster fan, it will lead to an increase in the negative pressure of the furnace.
Therefore, when the FGD system is in normal operation, the output of the booster fan should be controlled as much as possible to match the resistance of the FGD system, that is, the inlet pressure of the booster fan should be controlled as much as possible to be the same as that before the booster fan was put into operation. Because the whole flue gas system is a multi-capacity control object without self-balancing ability, the series operation characteristics of the induced draft fan and the booster fan are different, the characteristics of each section of the flue are different, the working conditions of the furnace side and the desulfurization side affect each other, and the parameters are related to each other, so it is required to adopt a good coordinated control scheme, and the control of the induced draft fan and the booster fan cannot be designed as an independent single-loop control system. At the same time, the self-control performance of the booster fan is required to be good, otherwise it will cause large fluctuations in the negative pressure of the furnace and surge of the induced draft fan, which will affect the automatic input of the unit, and even cause the boiler fuel to trip (MFT) and stop the unit in serious cases.
In addition to the quality of the actuator itself and the damage during operation, the installation quality of the guide vane is also a reason.
-
Anonymous users2024-02-14In the actual work, if it is found that the design value of the axial flow fan and the casing with adjustable static blade is low, then the blade of the static blade should be cut, and the distance between the top of the static blade and the casing should be appropriately increased, and it is recommended to increase it to 8mm. In actual work, if you encounter the problem that the torque setting value of the dynamic actuator of the moving blade adjustable booster fan is too small, it is recommended to increase the torque setting value by 50%. At the same time, in the process of operation, the protection of the large difference between the command and the bit return should be appropriately increased, and if the deviation is large, then the staff should ensure that the command is in a locked state.
In addition, for the inlet pressure of the booster fan, a pre-alarm signal should also be set, when the inlet pressure exceeds 500pa, the system should automatically switch to a manual state, and there should be color marks before and after the switch, so that it is very convenient for the staff to monitor.
-
Anonymous users2024-02-131. The main bearing box of the fan, the lubrication device and its connecting pipes are not allowed to leak grease.
2. Check whether the lowest point of the fan inlet chamber with a diameter of not less than 50mm is normal.
3. Check whether the lifting lugs or hanging holes for maintenance can be normal and practical to prevent corrosion.
4. Whether the flexible connection is cracked or wrinkled to prevent breakage.
5. The temperature of the rolling bearing is used to measure the main bearing of the fan, and its normal working temperature is not more than 70, and the maximum temperature shall not exceed 90.
6.Check whether the fan should have a stall alarm device and a vibration monitoring device to see if it is working normally. Check whether the line is aging.
7. Check and maintain each lubrication point at a fixed time.
8. The noise value at 1 meter away from the fan shell shall not be greater than 85db(a) of the fan.
9. External thermal insulation inspection.
10. Motor noise inspection.
Note: The operation of the booster fan is mainly checked by vibration, noise and bearing temperature to check whether it is operating normally.
-
Anonymous users2024-02-12Overnight repurchase resumed the transfer fee of Haifu shares.
There are dozens of types of flue gas desulfurization technology, according to whether water is added in the desulfurization process and the dry and wet form of the desulfurization products, flue gas desulfurization is divided into: wet, semi-dry, dry three types of desulfurization processes. The wet desulfurization technology is relatively mature, with high efficiency and simple operation. >>>More
There are two kinds of turbocharging, one is exhaust supercharging, which is more common, such as Bora, Passat and A6 are exhaust supercharging, and Mercedes-Benz S600 is mechanical supercharging turbocharging technology, which can also be transliterated as Taibao. Readers who have read "Water Margin" must be no stranger to the character of Shenxing Taibao Dai Zong, his"Divine Practice"It seems to be true: with two armoured horses tied to their legs, they can run 500 miles in one day; If you tie four of them, you can fly eight hundred miles. >>>More
cao+so2====caso32caso3+o2====2caso4
so2+cao+1/2h2o→caso3·1/2h2o >>>More
The horsepower of the engine is one aspect, and the most important thing is the gearbox matching aspect of the gearbox, as well as whether the chassis is a weighted chassis, because if you want to overload, you need to add shock absorbing springs. The most important thing is the rear axle, because if the overload is large, the half shaft and the reducer and the rear axle housing can not withstand it. The car in my factory is at most, and I only let the workers load about six tons at a time, but my car is not a supercharger.
Common membrane separation methods mainly include microfiltration, ultrafiltration, nanofiltration, reverse osmosis, electrodialysis, pervaporation and other methods. >>>More