On July 17, 2026, Zhuozhou PRST Electrical Equipment Co., Ltd. completed technical verification for a chemical client’s photochemical pilot scale-up project. Unlike most peers that merely conduct system integration, PRST relies on self-developed core light source technology to deliver one-stop solutions covering customized light source design, optimized cooling systems and tailored reactor configurations. The solution enables clients to scale up stably from laboratory trials to 2000L industrial mass production.
Client Pain Points & Core Technical Objectives
The client’s two photochemical processes were limited to lab-scale trials and faced obvious bottlenecks during capacity expansion. Based on on-site verification, PRST targeted three key technical pain points.
1. Low and unstable light source efficiency: The client’s original 275nm high-pressure mercury lamps and 340nm UV tubes suffered from uneven light distribution, low photon utilization and short service life after scale-up. Commercially available universal light sources fail to match customized dual-wavelength reaction requirements, resulting in high energy consumption and unstable reaction performance.
2. Conflicts between high-power lighting and low-temperature control: The second reaction requires stable low-temperature conditions, yet conventional high-power light sources generate excessive heat. Traditional cooling schemes cannot balance irradiation efficiency and precise temperature control, causing fluctuating product yield and quality.
3. Uncertain reactor configuration selection: The client lacked engineering experience to choose between tank-type and pipeline-type reactors. It was difficult to match the optimal process with its weakly alkaline ethyl acetate-triethylamine homogeneous system and 2000L/8h production capacity requirements.
PRST’s Core Edge: Custom Self-developed Light Source Technology
As a leading manufacturer with independent photochemical light source R&D and customization capabilities, PRST differs greatly from ordinary system integrators. Instead of passively matching processes with purchased standard lamps, PRST customizes light source solutions based on specific reaction wavelengths, kinetic characteristics and production scales, realizing process-oriented light source design.
For the client’s dual 275nm and 340nm reaction systems, PRST developed dedicated modular light source arrays.
275nm Deep UV Module: Optimized lamp electrode and filling formulas plus self-developed concentrating structures boost effective irradiation intensity by over 30%, perfectly matching short-wave reaction demands.
340nm UV Module: Lamp power and layout are optically simulated and optimized to deliver uniform in-pipeline light intensity, eliminating traditional dead zones and local overexposure issues for stable long-wave reactions.
PRST also provides full comparative analysis between high-pressure mercury lamp and UV-LED routes in terms of photon efficiency, operating cost and service life, supporting clients with data-driven equipment selection.
Dual-circuit Cooling System for Precise Low-temperature Control
PRST’s dual-circuit cooling solution integrates independent light source liquid cooling and reactor jacket heat exchange. The integrated liquid cooling structure stabilizes light source operating temperature and extends service life, while the jacket circulation system achieves full-range precise temperature control. This design effectively resolves the heat contradiction between high-power irradiation and strict low-temperature reaction conditions.
Dual Reactor Configurations for Diversified Production
Aiming at the client’s continuous two-step reaction without intermediate separation, PRST offered two compatible engineering solutions.
Tank-type reactor: Equipped with plug-in mercury lamps, featuring flexible operation and easy maintenance, suitable for multi-variety, small-batch production.
Pipeline-type reactor: Series PTFE pipeline structure with uniform along-flow irradiation and short optical path, supporting high-efficiency large-scale continuous production.
Both configurations adopt corrosion-resistant glass-lined/stainless steel bodies and PTFE sealing materials, fully adapting to the client’s weakly alkaline working conditions.
Conclusion: Light Source R&D Drives Industrial Upgrading
Independent core light source R&D is PRST’s foundational competitiveness in photochemical equipment. PRST builds a full product matrix covering light source modules, cooling systems and diversified reactors, delivering integrated “light source + process + equipment” solutions.
This scaled-up project sets a reliable engineering benchmark for photochemical industrialization in fine chemical and pharmaceutical industries. PRST will continue supporting clients’ pilot line construction and helping more enterprises achieve stable, efficient and standardized photochemical mass production through professional technical services.