Technical requirements and quality inspection points of dust removal fans

A dust collection hood is set up in each ash place, and the dust-containing gas is transported to the dust removal device through the pipeline gas path, in which the dust is collected in the dust removal device after the gas-solid separation is carried out, and the clean gas is introduced into the main pipe or directly discharged into the whole set of equipment into the atmosphere, that is, the dust removal system, and the dust collector is an important part of the system. From the perspective of ventilation and dust removal, dust is all solid small particles that can float in the air for a long time, and is a dispersion system, called aerosol, in which air is the dispersed medium and solid particles are the dispersed phase. A dust collector is a device that separates these small solid particles from aerosols.

Each set of dust removal system should be equipped with a centrifugal fan. The centrifugal fan is assembled and supplied together with the dust collector body. The centrifugal fan should be provided with a vibration damping base. The design and manufacture of centrifugal fans should meet the requirements of relevant technical standards and specifications.

The hardware composition of the real-time monitoring system of the machine is a high-speed rotating equipment, which belongs to the important equipment on the steelmaking production line, if the failure occurs, it will directly affect the normal operation of the blast furnace The fan real-time monitoring system includes four working procedures such as vibration signal acquisition, data extraction and preservation, data transmission and data processing, and the hardware equipment is composed of piezoelectric sensors, data collectors and industrial control computers, as shown. The piezoelectric sensor collects the vibration signal of the fan monitoring point, and converts it into a data signal through the data collector

National Science and Technology Research Program, (2005BA102C) data transmission to the host computer for analysis and processing, to achieve real-time monitoring.

The existing program obtains the data signal of the fan vibration, and then the data signal acquisition program extracts and saves the data, and the data signal analysis program analyzes and processes the data, which is displayed by the man-machine interface, so as to realize real-time monitoring of the state.

The realization of the data signal acquisition program in the real-time monitoring system of the wind turbine, the built-in application of the data collector completes the acquisition and conversion of vibration signals. Because the converted digital signal is a unique format, secondary development is necessary to realize the preservation and other operations of the digital signal. In Windows applications, WMPondData messages can be used to exchange data between processes in the application and complete the processing of digital signals.

The cyclone dust collector of the dust collector is a type of dust removal device. The dust removal mechanism is to make the dust-containing air flow rotate, with the help of centrifugal force to separate the dust particles from the air flow and trap them on the wall, and then with the help of gravity to make the dust particles fall into the ash hopper.

Each component of the cyclone dust collector has a certain size ratio, and the change of each proportion relationship can affect the efficiency and pressure loss of the cyclone dust collector, in which the diameter of the dust collector, the size of the air inlet, and the diameter of the exhaust pipe are the main influencing factors.

When using it, it should be noted that when a certain limit is exceeded, the favorable factors can also be transformed into disadvantages. In addition, some factors are beneficial to improve the efficiency of dust collection, but will increase the pressure loss, so the adjustment of various factors must be taken into account.

Cyclone dust collector.

1. The flue gas flow rate of the inlet and outlet flue of the dust collector (measured by selecting representative points through the flue gas velocity distribution).

2. The flue gas humidity of the inlet and outlet flue of the dust collector (the inlet and outlet of the electrostatic precipitator are averaged once tested).

3. The amount of flue gas oxygen and temperature of the inlet and outlet flues of the dust collector (the inlet and outlet of the electrostatic precipitator are tested for 3 minutes each).

4. Flue gas static pressure, full pressure, and dynamic pressure of the inlet and outlet flue of the dust collector (automatic test of the sampler) 5. The dust concentration of the flue gas of the inlet and outlet flue of the dust collector (automatic test of the sampler) 6. Ambient atmospheric pressure (automatic test of the sampler).

Dust removal equipment.

1. Preparation and inspection before start-up.

1. Check whether the bolts at each connection are loose.

2. Whether the solenoid valve of the vibration system is installed in place.

3. Whether the air path is closed.

4. Turn on the air source of the vibration system, check the pressure and whether there is air leakage.

2. Start the vibration system and fan.

1. Start the vibration system and observe whether it is normal.

2. Start the motor and observe whether the motor is running normally and whether there is any abnormality.

4. Reconfirm whether the bolts at each connection are loose and there is an abnormal sound.

5. When running, always pay attention to the condition of the dust removal fan and whether there is any abnormal sound.

6. The equipment can only run after 5 minutes of operation of the dust removal fan.

3. Shutdown. 1. The fan can be turned off only after the equipment is shut down for 15 minutes.

2. Turn off the power supply and air source after the shutdown.

Fourth, maintenance matters.

1. Always check whether the fasteners are tightened, and tighten them in time if they are loose.

2. Always check whether there is lubricating oil at each lubrication point. Ensure that the oil quality and oil quantity meet the requirements.

3. Clean the dust and foreign matter in the dust removal fan frequently.

4. Check the vibration of the fan frequently, ensure the smooth operation of the fan, and stop the machine for inspection and treatment when the vibration is found.

5. Regularly check whether the transmission belt is damaged, broken, missing, elongated, slipped, etc., and should be dealt with in time if found.

6. Clean and replace the filter element regularly, and maintain the motor regularly.

7. Regularly check the gap size of each part of the wind ant Zheng machine to prevent friction and collision between the rotating part and the fixed part.

8. Regularly inspect the pipeline connected to the fan, and regularly clean up the dirt and impurities in the pipeline to prevent the fan from corroding.