Design Principles:

Utilize reliable production technologies and equipment, along with modern management, to replace traditional, outdated painting processes, equipment, and management. Meet requirements for painting processes, paint quality, environment, hygiene, and production schedules; equipment is reliable, advanced, aesthetically pleasing, economically operational, easy to operate, and convenient.

Painting workshop layout principles:

The manual and non-manual operation areas are relatively separated.

2. Clean and non-clean zones are separated relative to each other.

3. Minimize transportation volume.

4. Minimize noise pollution.

Process Design:

Based on the absorption and digestion of advanced domestic and international coating technologies and mature experiences, ensure that this process design is practical, reliable, and advanced.

The equipment design and manufacturing strictly comply with national standards regarding environmental protection, hygiene, and safety. Noise reduction measures are implemented for all equipment, ensuring the workshop noise is kept below 85 decibels.

The equipment meets the product's usage requirements, operates reliably, is easy to operate, and is convenient for maintenance and upkeep.

The accessories, materials, and electrical components selected are all renowned domestic products, ensuring reliable quality and guaranteeing the equipment's performance and service life.

Fully consider the interlinkage between systems and implement protective measures for equipment failures to prevent accidents.

(6) The spray booth utilizes a dry spray booth with top air supply and bottom exhaust.

Equipment Description and Structural Design

1. Working Principle:

During painting, external air is filtered through the primary filter via the intake vent and then delivered to the roof by the blower (heating system activated in winter). This allows the gas to enter the static pressure room, uniformly filling the paint room and forming an air curtain around the workpiece. At this point, the empty room air velocity in the paint room exceeds 0.23 m/s, ensuring that paint mist during application does not linger in the operator's breathing zone but quickly descends. Subsequently, the air flow is directed through the exhaust fan into the exhaust gas treatment system, which leads to the exhaust duct, passing through an environmental box before being released. This ensures that the exhaust gas meets the GB16297-1996 standard.

2. Main structure and components of the equipment

Structure Composition: Comprises the room body, lighting system, air filtration system, air supply system, heating system, exhaust system, paint mist and waste gas treatment system, electrical control system, and safety system, among other components.

2.1 Body: Composed mainly of the frame, wall panels, access doors for workpieces, and safety doors. The body meets the national or relevant industry standards for strength, stability, thermal insulation, sealing, shock resistance, and seismic resistance.

⑴ Frame

The cabinet frame is made from square steel tubes and galvanized steel plates that are bent and welded together.

⑵ Panel

The room panels are made of composite thermal insulation boards, with both inner and outer panels being color steel plates, filled with 58mm thick polyurethane insulation material in between. The total thickness is 75mm. All panels are of modular construction for easy assembly and disassembly. The color is white.

Lighting System: Explosion-proof lighting groups are installed at the top and side sections of the room. The top side groups are mounted at a 45-degree angle, while the side groups are installed within the wall panels. The tubes use explosion-proof Philips high-efficiency sources, ensuring safety, energy savings, and ease of maintenance. The ballasts are designed specifically for our spray booth by our company, guaranteeing an illumination intensity of approximately 700 Lux.

Each side of the waist features two layers of lighting arrangement.

2.3 Air Filtration System

Air filtration is of two-stage design, including preliminary filtration (inlet air filtration) and high-efficiency filtration (top filtration). The preliminary filtration is set at the inlet, featuring a mesh structure, which effectively filters particles larger than 15μm.

The primary technical specifications of the initial-effect filter cotton are:

Raw Resistance              24Pa

Final Resistance          250Pa

Average Capture Rate (Calculation Method)  86%

Dust Holding Capacity: 620g/㎡

Thickness: 20mm

High-efficiency filtering materials are chosen, with 600G precision-grade filter cotton laid flat on the galvanized mesh at the bottom of the static pressure chamber. It is securely fastened with a round steel frame, which achieves a secondary air filtration and ensures more uniform airflow into the operation area, thereby guaranteeing the uniformity of air volume and cleanliness. The filter cotton has a multi-layer structure, with an intermediate oil-impregnated layer that provides strong adhesion, ensuring air cleanliness with dust concentration ≯1.5mg/m³, dust particle count ≯200 particles/cm³, and large dust particles ≯5µm. Differential pressure gauges are set on the top and bottom of the filter cotton. An alarm prompts for replacement when the filter cotton becomes severely clogged, causing a significant decrease in airflow velocity and an increase in pressure difference, thus avoiding mismatched supply and exhaust airflows that could lead to excessive indoor-outdoor pressure differences affecting the painting effect. Its main technical specifications are:

Model: 600

Original Resistance              19 Pa

Final Resistance          230Pa

Average Capture Rate: 98%

Dust Holding Capacity: 419g/m²

Thickness: 25mm

Flame Retardant Ability: Meets F5 Standard

2.4 Air Supply System: Mainly composed of an air blower, blower base, and steel frame. The blower bases are filled with sound-absorbing material to reduce noise and vibration.

Based on the workpiece characteristics, the unloaded wind speed in the paint room is above 0.23 m/s, as calculated,

Q1=3600FV=3600×（14×10）×0.23=115920m3/h

Considering aerodynamic resistance and interference coefficients, a total air supply volume of 120,000 m³/h is selected, with a total of 4 air supply systems, each equipped with 8 YDW type centrifugal fans.

Fan parameters are as follows:

Model: YDW

Airflow: 15,000 m³/h

Speed: 950 rpm

Pressure: 801 Pa

Power: 5.5 kW

Quantity: 8 units

2.5. Exhaust System: Composed mainly of exhaust fans, ducts, and profiles, etc. During painting, to discharge the filtered air at a high altitude, two sets of exhaust systems are installed, each with an exhaust capacity of 35,201 m3/h, to maintain the chamber in a slightly positive pressure state during painting, thereby ensuring the quality of the coating. Each set is equipped with one centrifugal fan, model 4-82.

2.6 Paint Mist and Waste Gas Treatment System: Utilizes dry treatment, with the treated gases emitted to high altitudes, in compliance with the national standard GB16297-1996.

Fan exhaust ducting