Product Details

The full name of the ZKW series vacuum hot water boilers using methanol (alcohol-based fuel) is Vacuum Phase Change Boiler. Note the two terms: vacuum and phase change. A vacuum boiler creates a vacuum environment within a sealed furnace body, fills it with heat transfer water, heats the heat transfer water through combustion or other methods, then the water evaporates and condenses onto the heat exchanger, where it heats the water that needs to be heated.

Vacuum hot water boilers supply hot water at different temperatures and for various purposes, such as central air conditioning, sanitary hot water, and process hot water. The lower section of the vacuum boiler structure is the same as that of a conventional boiler, consisting of a combustion chamber and heat transfer tubes; the lower section is equipped with a heat medium (boiler water), while the upper section is a vacuum steam chamber, containing an inserted U-shaped (or straight-tube) heat exchanger. Since the boiler operates under a negative pressure, it is very safe.

The heat medium (boiler water) inside the vacuum hot water boiler remains sealed within the vacuum chamber throughout the entire operation of the boiler, neither entering nor exiting, neither increasing nor decreasing, and transfers heat between the boiler's heat transfer pipes and heat exchangers.

The heat medium inside the furnace is pure water for effective deoxygenation, free from corrosion and scale buildup, extending the boiler's lifespan to over 20 years and even longer. In summary, a boiler with such performance naturally tends to replace the traditional drum-type and shell-type boilers.

Performance Advantages

1. Boiler Body: The combustion heating section of the vacuum phase change boiler body utilizes high-quality Q245 steel plates and 20# steel pipes. Its advantages include a large combustion chamber, low heat load in the boiler furnace, a large heating surface area, small volume, compact structure, and small water capacity with fast heating speed. Additionally, the integrated negative pressure evaporator above ensures stable performance and reliable operation. Due to the larger space of the negative pressure evaporator, the heat exchanger can be customized according to the user's requirements. Generally, horizontal boilers use straight tube heat exchangers, with removable ends and headers for easy maintenance and cleaning of the heat exchanger water pipes.

2. Heat Exchanger Manufacturing and Structure: The heat exchanger is made of stainless steel and inserted into the vacuum evaporation chamber in a tube bundle manner, with flanges connecting both ends. Advantages: easy to dismantle and replace, resistant to corrosion, easy to maintain and clean, and durable.

3. Automated Control: Equipped with high-quality controllers and a touchscreen control system, it automatically detects the water and outlet temperatures; it also identifies malfunctions in the burners and furnace interior. The system can control the burn time through programmed settings. It accurately adjusts the entire combustion process based on load changes, reducing the frequency of start-ups and shutdowns caused by load variations, ensuring the boiler operates normally and minimizes heat loss during start-up and shutdown.

4. Combustion Equipment: Due to the unique design of the vacuum phase change boiler, various imported and domestic oil and gas burners can be configured according to the type of fuel and the user's requirements through the installation panel.

5. Energy-saving: Utilizes vacuum hot water boiler technology, operating under vacuum conditions with a low boiling point. This effectively enhances thermal efficiency and heat exchange performance. The three-pass wet-back design of the boiler significantly increases the radiative and convective heat exchange area, achieving a high thermal efficiency of up to 95%.

6. Negative Pressure Operation of the Unit, Safe and Reliable: The unit operates under vacuum, with the heat medium in a vacuum state, eliminating the risks of expansion and explosion. The furnace stores a constant amount of heat medium water, ensuring no risk of dry burning. Multiple automatic protection devices offer unparalleled safety compared to other types of boilers.

7. Non-corrosive, scale-free, and long-lasting: The heat exchanger is made of stainless steel, with the heat transfer fluid injected once and operating in a sealed state, ensuring no corrosion or scaling. Its lifespan is nearly double that of a standard boiler, with a product life of up to 30 years.

8. Versatile Models, Multi-functional Use: Offers a variety of models including vertical, horizontal, fuel, gas, methanol, water pipe, and chimney types for customers to choose from freely. The heat exchanger is separated from the collector, allowing the heating water and hot water loads to be switched as needed, meeting different requirements for heating water and clean hot water in customer usage, ensuring clean and stable hot water.

9. Compact and Easy to Install: Modular design, high-performance heat exchange components, compact unit size for easy transportation and installation. Multiple units can be used in parallel in small spaces.

10. Unique Environmental Protection Features: Equipped with high-performance burners and a counterflow structure design, ensuring complete fuel combustion, and meeting the national tourism area emission standards for all environmental protection indicators.

11. Streamlined approval procedures: The unit operates under a vacuum, simplifying the inspection and annual audit processes for pressure windows, with operators not requiring certification.

Technical Specifications