In the production and operation of modern power plants, the belt conveyor system, as the core equipment for transporting materials such as coal and ash slag, has its cleanliness and operational efficiency directly impacting the safe production and environmental compliance of the entire plant. The belt cleaning water wash cleaning box, as a key device for belt cleaning, directly affects the service life of the belt, material transport efficiency, and on-site environmental hygiene.
I. Technical Principles and Structural Features of the Belt Cleaning Water Wash Cleaning Box
The belt cleaning water wash cleaning box is a high-efficiency cleaning device that integrates mechanical cleaning and water washing, primarily used to remove residual sticky materials, dust, and other pollutants from the belt surface. Its core working principle involves using a high-pressure spray system in combination with rotating brushes or scraper devices to achieve deep cleaning of the belt surface. Compared to traditional dry cleaners, the water wash cleaning box offers significant advantages such as more thorough cleaning, no secondary dust generation, and a longer service life.
In terms of structural composition, a complete belt cleaning water wash cleaning box typically includes the following key components:
1. **Spray System**: Uses stainless steel nozzles, with adjustable water pressure and spray angles to ensure full coverage cleaning of the belt surface.
2. **Cleaning Mechanism**: Includes polyurethane scrapers or nylon brush rollers, with material hardness selectable based on belt speed and material characteristics.
3. **Water Circulation System**: Equipped with a sedimentation tank and filtration device to enable the recycling of cleaning water, conserving water resources.
4. **Box Structure**: Made of 304 stainless steel or wear-resistant steel plate, offering good sealing and corrosion resistance.
5. **Automatic Control System**: Automatically adjusts cleaning parameters based on the belt's operating status, enabling intelligent operation.
II. Application Scenarios and Selection Points in Power Plants
In different production stages of power plants, the application requirements for belt cleaning water wash cleaning boxes vary significantly:
1. **Coal Conveying System**: Coal transport belts are prone to coal dust adhesion, especially in high-humidity environments, making traditional cleaners ineffective. The water wash cleaning box, with high-pressure water flushing and rotating brushes, effectively addresses coal dust adhesion. Models with high processing capacity and explosion-proof design are recommended.
2. **Ash Removal System**: Fly ash has fine particles and is prone to dust generation, making dry cleaning likely to cause secondary pollution. The water wash cleaning box effectively suppresses dust diffusion and is a key device for environmental compliance. Sealing performance and dust removal efficiency should be prioritized.
3. **Desulfurization System**: Gypsum slurry transport belts are prone to scaling and require regular cleaning. Models with strong corrosion resistance and self-cleaning functions are more suitable.
When selecting a model, power plant technicians need to focus on the following factors:
- Belt width and operating speed: Determine the size specifications and processing capacity of the cleaning box.
- Material characteristics: Including viscosity, particle size, corrosiveness, etc., which affect the cleaning method and material selection.
- Installation space: Consider the convenience of equipment maintenance and repair.
- Environmental requirements: Different regions have varying standards for wastewater discharge, affecting the design of the water treatment system.
- Energy consumption indicators: Including water and electricity consumption as operational cost factors.
Installation, Maintenance, and Usage Considerations
Proper installation and maintenance are key to ensuring the long-term stable operation of the belt cleaning water wash cleaning box:
**Installation Points**:
1. Location selection: Generally installed below the head pulley of the belt conveyor to ensure smooth drainage of wastewater after cleaning.
2. Alignment adjustment: Ensure the cleaning device is aligned with the belt centerline to avoid uneven wear.
3. Water pressure testing: Gradually increase water pressure during debugging to observe cleaning effectiveness and splash conditions.
4. Electrical wiring: Implement waterproofing measures, especially for outdoor installations.
**Daily Maintenance**:
- Weekly inspection of scraper or brush roller wear, with timely adjustment or replacement.
- Regular cleaning of filters and sedimentation tanks to prevent clogging.
- Winter antifreeze measures, draining pipeline water during shutdowns.
- Recording water and electricity consumption data to analyze operational efficiency.
**Common Fault Handling**:
1. Reduced cleaning effectiveness: May be due to clogged nozzles, insufficient water pressure, or scraper wear; address accordingly.
2. Abnormal noise: Check bearing lubrication and fastener tightness.
3. Water leakage: Identify issues with aging seals or box weld seams.