The method of cleaning coal filter mainly includes two categories: physical cleaning and chemical cleaning. The following are the specific steps and precautions:
Physical cleaning
Physical cleaning is to clean the filter element by physical force, and common methods include water flushing, air purging and mechanical vibration.
Water rinse:
Using clean water or water flow with appropriate pressure to wash the filter element can effectively remove the particles and dirt on the surface of the filter element and restore the air permeability of the filter element.
Pay attention to the choice of water pressure and water temperature to avoid damage to the filter element.
Air purge:
The filter element is purged with high-pressure air to remove dust and fine particles on the filter element.
Control air pressure to avoid damage to the filter element.
Mechanical vibration:
Vibration equipment is used to vibrate the filter element to shake off surface dirt and particles.
Ensure that the vibration frequency and strength are moderate to avoid damage to the filter element structure.
Chemical cleaning
Chemical cleaning is done by using cleaning agents to remove sediment and dirt from the filter element.
Choose the right cleaning agent:
Select the appropriate cleaning agent according to the material and dirt type of the filter element. Commonly used cleaning agents are alkaline cleaning agent and acid cleaning agent, alkaline cleaning agent can effectively dissolve grease and organic pollutants, acid cleaning agent can remove rust and inorganic salts and other substances.
Pay attention to choose a neutral or less corrosive cleaning agent to prevent corrosion of the filter element.
Prepare the cleaning solution:
The cleaning agent and water are mixed in a certain proportion to make a cleaning solution.
Ensure that the concentration of the cleaning solution is moderate, which can effectively remove dirt and will not cause corrosion to the filter element.
Soaking and cleaning:
The filter element is immersed in the cleaning solution for a period of time, so that the cleaning solution fully penetrates into the filter element.
The use of mechanical or ultrasonic stirring or oscillation, accelerate the reaction between the cleaning agent and the dirt, the dirt will be completely removed.
Rinse and dry:
The filter element after cleaning is fully rinsed to remove the residual cleaning agent and dirt.
Use proper drying equipment or natural drying filter element to restore it to a clean and dry state.
Ultrasonic cleaning
For the coal mine hydraulic support filter element and other difficult to clean the filter element, can be cleaned by ultrasonic cleaning machine.
Disassemble the filter element:
Disassemble the filter element of hydraulic support whose filtration performance has decreased.
Prepare the cleaning solution:
The special hydraulic support cleaning agent for coal mine is diluted with water in proportion to the ultrasonic cleaning machine.
Set cleaning parameters:
Adjust the cleaning temperature, time and other parameters of the cleaning machine.
Cleaning filter element:
Put the disassembled filter element into the ultrasonic cleaning machine for cleaning.
After cleaning, remove the filter element for rinsing and drying.
Precautions
Regular cleaning:
Regular cleaning of coal mine filter is necessary to avoid equipment failure caused by clogging of filter.
Choose the right cleaning method:
Select the appropriate cleaning method according to the material, dirt type and cleaning requirements of the filter element.
Safety protection:
When performing chemical cleaning, it is necessary to pay attention to safety protection to avoid contact with harmful chemicals.
Training and guidance:
Strengthen the training and guidance of operators to improve their understanding of coal mine filter cleaning methods and operational skills.
Develop cleaning management system:
Develop and implement strict cleaning management system to ensure the efficient cleaning of filter element.
To sum up, cleaning coal filter needs to choose the appropriate cleaning method according to the actual situation, and cleaning in strict accordance with the operating procedures to ensure the cleaning effect and long-term service life of the filter.