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Help CenterSand Tank Filter for Hot Spring Bathing Water Treatment and Circulation Filtration
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Core Pain Points and Solutions in the Industry
In the hot spring bathing and water park industry, water quality circulation treatment has long faced three major pain points: high suspended solids content. Traditional filtration equipment has difficulty effectively removing fine particles, resulting in turbid water and bacterial growth; low backwashing efficiency. Ordinary sand filters need to be shut down frequently for cleaning, affecting the continuity of operation; poor corrosion resistance of equipment. Hot spring water is rich in minerals and chloride ions, and the metal shell is prone to rust and scale, shortening the service life. In response to these problems, Henan Boyue Amusement Equipment Co., Ltd. has developed the Sand Filter (Circulation Filtration System for Hot Spring Bathing Water Treatment) based on years of experience in water park and hot spring resort projects. This equipment uses a high-strength fiberglass shell and combines an optimized water distribution structure to achieve efficient sewage interception and automatic backwashing, completely solving the water quality problem and providing a stable, energy-saving and durable circulation filtration solution for hot spring bathing places.
Working Mechanism
The sand filter is based on the principle of deep filtration: Water enters the cylinder through the water inlet and is evenly distributed to the filter sand layer through the water distributor. The quartz sand medium intercepts impurities such as suspended solids and colloids, and the purified water is collected and flows out by the water collector. As the operation time increases, the amount of sewage intercepted by the filter layer increases and the pressure difference rises. At this time, the backwashing program is started: The water flows in the reverse direction through the water collector, stirs the sand layer and flushes out the impurities, and finally discharges from the drain. The whole process is automatically switched by the multi-way valve without shutdown.
Product Features and Advantages
- Strong Corrosion Resistance: The fiberglass shell is integrally formed, resistant to acid, alkali and chloride ions, specially designed for hot spring bathing water quality, with a service life of more than 15 years.
- High Filtration Precision: 0.5 - 0.8mm graded quartz sand is used, and the effluent turbidity is lower than 1NTU, meeting the requirements of the "Basic Specifications for Hot Spring Services".
- Large Flow and Low Energy Consumption: With optimized hydraulic design, the single-unit treatment capacity can reach 30 - 80m³/h, with small operating resistance, saving 15% - 20% of the pump energy consumption.
- Automatic Backwashing: Standard equipped with a six-way multi-way valve or pneumatic valve, which can automatically start backwashing according to the pressure difference or time, saving about 30% of water and reducing manual operation.
- Easy Installation and Maintenance: Modular design, small footprint, no need for deep foundation, and the replacement cycle of filter sand reaches 2 - 3 years.
Technical specifications (some typical models)
| Parameters | BY-600 | BY-800 | BY-1000 |
|---|---|---|---|
| Diameter (mm) | 600 | 800 | 1000 |
| Height (mm) | 1350 | 1550 | 1800 |
| Filter area (m²) | 0.28 | 0.50 | 0.78 |
| Maximum working pressure (MPa) | 0.4 | 0.35 | 0.35 |
| Filtration rate (m/h) | 25 - 45 | 25 - 40 | 25 - 35 |
| Inlet and outlet water diameter (mm) | DN50 | DN65 | DN80 |
| Weight (kg) | 45 | 65 | 90 |
Trust endorsement and company advantages
Henan Boyue Amusement Equipment Co., Ltd. has been deeply involved in the water treatment fields of water parks, hot spring resorts, swimming pools, SPA hydrotherapy centers, etc., providing one-stop services from project planning and design to equipment supply, engineering construction, and after-sales operation and maintenance. We have provided circulation filtration systems for over 200 hot spring projects across the country and have cumulatively delivered more than 5000 sand tank filters. The equipment strictly adheres to 《Swimming Pool Water Quality Standard》 (CJ/T 244 - 2016)And in line with the relevant requirements of “Hot Spring Service Specification”, all products pass the static pressure test and flow calibration before leaving the factory. Choosing Henan Boyue Amusement Equipment Co., Ltd. means choosing a reliable technical support and full-life cycle service. We recommend that you match the suitable sand filter model and sand layer thickness according to the actual water volume, circulation cycle and suspended solids load. If you need more accurate selection calculation or scheme design, please feel free to contact Henan Boyue's technical team at any time. We will provide free water quality analysis, equipment layout drawing and operating cost evaluation.
FAQ (Common Professional Questions)
- Q: What's the difference between a sand filter and an ordinary quartz sand filter? A: The sand filter is specially designed for hot spring bathing. Its shell is made of fiberglass for corrosion resistance. The internal water distributor is optimized to ensure uniform water flow, and it is standard-equipped with a multi-way valve for automatic backwashing; ordinary quartz sand filters are mostly made of carbon steel or stainless steel, with poor corrosion resistance and require manual operation, which are not suitable for the high-chlorine environment of hot springs.
- Q: Will the sulfur in hot spring water affect the filtration effect or the service life of the equipment? A: The fiberglass shell has excellent corrosion resistance to sulfides, chloride ions, etc., and no chemical reaction will occur. However, it is recommended to regularly check the caking of the sand layer. Generally, replace the filter sand every 2 years to maintain the filtration efficiency.
- Q: How to set the backwashing frequency? A: It can be set according to the differential pressure (generally 0.05 - 0.08MPa) or time. Under normal operating conditions, backwash once every 8 - 12 hours, about 3 - 5 minutes each time, which is water-saving and efficient. If the water quality is poor, the cycle can be appropriately shortened.
- Q: What basic conditions should be noted for the equipment installation? A: The sand filter should be placed on a horizontal concrete foundation with a bearing capacity of ≥500kg/m². Leave at least 0.5m of operating space around it. The inlet and outlet pipes should meet the caliber requirements, and exhaust valves and check valves should be equipped.
- Q: How to choose the specification and size of the sand filter? A: According to the circulation flow = pool volume / circulation cycle. For example, for a 100m³ hot spring pool with a circulation cycle of 4 hours, the flow rate needs to be 25m³/h. Refer to the technical table and choose BY - 800 (the flow rate is about 15m³/h at a filtration speed of 30m/h), and two units can be connected in parallel, or choose a single BY - 1000 to meet the demand.
- Q: How long does the filter sand need to be replaced? A: Under normal use, the service life of quartz sand is about 2 - 3 years. When the turbidity of the effluent continues to rise and the backwashing effect declines, it is recommended to replace it. When replacing, the tank body must be thoroughly cleaned, and graded sand of 0.5 - 1.0mm should be used.
- Q: Can the equipment handle essential oils and foams used in hot spring bathing?Answer: The sand tank mainly removes suspended solids. For organic substances such as essential oils, activated carbon or oil removal equipment needs to be used in conjunction. If the water has a high oil content, it is recommended to install a hair collector and an oil removal device at the front end to protect the filter layer of the sand tank.
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