Explosion-proof Sand Filter Carbon Filter Fully Automatic Reverse Osmosis Precision Filter Purification Water Treatment System

Short Description:

Product Detail

Product Tags

Explosion-proof Sand Filter + Carbon Filter + Fully Automatic Reverse Osmosis + Precision Filter Water Purification System

This is a specialized industrial water treatment system designed for explosive hazardous environments (e.g., petrochemical plants, oil refineries, chemical workshops with flammable gas/vapor). It integrates explosion-proof pretreatment, automatic RO purification, and precision filtration to produce stable, high-purity water while complying with explosion-proof safety standards.

Core System Composition & Functions

Component	Core Function	Explosion-proof Design Key Points
Explosion-proof Sand Filter	First-stage pretreatment: Remove suspended solids, sediment, rust, and particles ≥20μm in raw water; reduce turbidity and SDI value to protect downstream equipment.	1. Shell material: Carbon steel with anti-corrosion coating or 304/316L stainless steel (meets pressure vessel standards). 2. Control system: Explosion-proof motor, explosion-proof solenoid valve, and explosion-proof junction box (certified to Ex d IIB T4 or higher standards). 3. Operation: Fully automatic backwashing with explosion-proof level sensors and pressure switches to avoid manual operation in hazardous areas.
Explosion-proof Carbon Filter	Adsorb residual chlorine (≤0.1mg/L), organic matter, odor, and pigments; reduce TOC content to prevent RO membrane oxidation.	1. Media: Granular activated carbon (GAC) or powdered activated carbon (PAC) with high adsorption capacity. 2. Explosion-proof configuration: Same as sand filter—explosion-proof motor for backwashing, intrinsically safe (Ex ia) pressure transmitters. 3. Safety protection: Pressure relief valve to prevent overpressure; flame arrester at gas outlet (to avoid ignition of flammable gas in the filter).
Fully Automatic Reverse Osmosis (RO) Unit	Core purification unit: Remove 95–99% of dissolved salts, heavy metals, bacteria, and viruses; produce pure water with conductivity ≤1.3μS/cm (25℃).	1. Explosion-proof design: High-pressure pump with explosion-proof motor; RO control cabinet with Ex d explosion-proof enclosure (isolates electrical sparks from hazardous environments). 2. Automatic control: PLC-based intelligent system (explosion-proof version) to monitor pressure, flow rate, and conductivity; auto-adjust operation parameters and trigger alarms for anomalies. 3. Safety features: Overpressure protection, low-flow shutdown, and explosion-proof leakage detector (to prevent water leakage from triggering electrical hazards).
Precision Filter	Final polishing filtration: Remove fine particles (≥1μm) from RO product water; prevent secondary contamination and protect subsequent equipment (e.g., pure water tank, UV sterilizer).	1. Filter element: PP melt-blown filter or pleated filter (high filtration precision, easy replacement). 2. Explosion-proof design: Non-electrical component (no ignition source), but shell is made of anti-static material; quick-opening clamp with anti-spark coating (to avoid static sparks during element replacement).
Supporting Explosion-proof Auxiliaries	Ensure stable and safe operation of the entire system.	1. Explosion-proof instrument: Pressure gauge, flow meter, conductivity meter with Ex ia intrinsically safe certification. 2. Anti-static measures: All equipment grounded; pipeline with anti-static coating to prevent static accumulation. 3. Explosion-proof UV sterilizer: Optional, used for post-treatment of pure water to kill residual bacteria (with Ex d enclosure).

System Workflow (Explosion-proof Environment Applicable)

Pretreatment StageRaw water is pressurized by an explosion-proof booster pump and enters the explosion-proof sand filter to remove large suspended particles. Then it flows into the explosion-proof carbon filter to eliminate residual chlorine and organic matter. The effluent from the carbon filter meets the RO inlet requirements (SDI < 5, residual chlorine < 0.1mg/L).
RO Purification StagePretreated water is pressurized by an explosion-proof high-pressure pump to reach the RO membrane operating pressure (1.0–1.5MPa). Water molecules pass through the semi-permeable membrane to become pure water, while concentrated water (containing impurities) is discharged to a safe area (or recycled for energy recovery). The PLC system automatically monitors the RO operation status and adjusts parameters in real time.
Precision Filtration & Post-treatment StageRO product water enters the precision filter to remove fine particles, ensuring the water quality meets industrial application standards. If needed, the water can be further treated by an explosion-proof UV sterilizer or ozone generator to achieve sterile water quality, then stored in an explosion-proof pure water tank.

Key Advantages & Application Scenarios

1. Core Advantages

Explosion-proof Safety: All electrical components and control systems comply with national explosion-proof standards (e.g., ATEX, IECEx, GB 3836), suitable for Zone 1/2 hazardous environments.
Fully Automatic Operation: No manual intervention required; auto backwashing, auto membrane cleaning, and fault alarm functions reduce operation labor costs.
High Purification Efficiency: RO membrane removes most impurities; precision filter ensures the final water quality is stable and reliable.
Anti-static & Overpressure Protection: Comprehensive safety design prevents static sparks and overpressure risks, ensuring long-term safe operation.

2. Typical Application Scenarios

Petrochemical Industry: Preparation of boiler feed water, cooling water, and process water in oil refineries and chemical plants (hazardous areas with flammable gas).
Mining Industry: Water treatment for coal mines and oil fields (explosive gas exists in underground or workshop environments).
Pharmaceutical Industry: Production of purified water in workshops with flammable solvents (complies with GMP standards and explosion-proof requirements).
Military & Aerospace: Water supply for equipment maintenance in explosive hazardous areas.

Operation & Maintenance Notes (Explosion-proof Focus)

Explosion-proof Equipment Maintenance
- Do not disassemble explosion-proof enclosures in hazardous areas; maintenance must be carried out after cutting off power and ventilating the area.
- Regularly check the sealing performance of explosion-proof junction boxes and replace damaged sealing rings in time to prevent flammable gas from entering.
- Grounding resistance must be ≤4Ω; check grounding status monthly to avoid static accumulation.
Filter Media & Membrane Maintenance
- Backwash the sand filter and carbon filter every 24 hours (explosion-proof motor drives backwashing); replace activated carbon every 6–12 months.
- Clean the RO membrane with acid/alkali cleaning agent every 3–6 months (use explosion-proof cleaning pump); replace the membrane every 2–3 years if the desalination rate drops below 90%.
- Replace the precision filter element every 1–3 months (operate in a non-hazardous area or after power cut to avoid static sparks).
Safety Management
- Operators must hold explosion-proof operation certificates; strictly follow the operation manual to avoid illegal operations.
- Regularly calibrate explosion-proof instruments (e.g., pressure transmitter, conductivity meter) to ensure accurate data monitoring.