Introduction

As the core equipment of industrial heat exchange systems, closed cooling towers are widely used in high-risk industries such as chemical, petrochemical, and pharmaceutical industries. In these environments, the presence of explosive gases or dusts places strict requirements on equipment safety. Explosion-proof closed cooling towers can operate stably in flammable and explosive environments through special design and material selection, becoming a key equipment to ensure production safety.

Working principle of explosion-proof closed cooling towers

Closed cooling towers achieve heat exchange through the contact between circulating water and air. The core process includes spray water circulation, forced air convection, and coil heat dissipation. Explosion-proof equipment adds multiple safety measures on this basis:

Explosion-proof electrical system: explosion-proof motors, junction boxes, and control systems that comply with ATEX or IECEx standards are used to eliminate the possibility of explosions caused by electric sparks.

Structural explosion-proof design: The tower body is made of impact-resistant materials (such as fiberglass FRP or aluminum alloy), and explosion vents are set at key locations to reduce the risk of sudden internal pressure increases.

Inert gas protection: Nitrogen injection system can be optionally equipped to suppress the concentration of combustible gases.

Key technical parameters and selection

Explosion-proof level classification: According to the classification of hazardous areas (Zone 0/1/2), select equipment with Ex d IIC T4 or higher standards.

Material selection: Stainless steel 316L or copper-nickel alloy coils are corrosion-resistant and antistatic; the shell is made of flame-retardant fiberglass.

Redundant design: Dual fan configuration and backup pump group ensure continuous operation under fault conditions.

Application scenarios and case analysis

Petrochemical industry: When processing high-temperature hydrocarbon media in refineries, explosion-proof closed cooling towers can effectively cope with explosive gas environments such as hydrogen and methane.

Lithium battery production workshop: Prevent the risk of dust explosion caused by electrolyte volatilization.

Pharmaceutical industry: Ensure safety in the recovery scenario of ethanol and acetone solvents.

Maintenance and safety operation specifications

Regular inspection: Check the sealing of explosion-proof electrical equipment every month, and conduct explosion-proof certification review every year.

Cleaning management: Remove the deposits of combustible materials on the surface of the coil to prevent local overheating.

Emergency plan: Configure a combustible gas detector and interlock the shutdown with the cooling tower.

Future development trend

With the popularization of smart factories, explosion-proof closed cooling towers are developing in the direction of intelligence. For example, the integrated Internet of Things (IoT) sensors monitor the concentration of combustible gases in real time and predict potential risks through AI algorithms. If you want to know more about explosion-proof closed cooling towers, you can find Qidu Cooling Tower Manager Wang (+86) 139-2575-3875