Henan Leway Thermal Equipment Manufacturing Co., Ltd. produces the vacuum hot water boiler that adopts a three-pass structure, with threaded smoke tubes to enhance heat transfer. The unique wet-back reburning chamber structure abandons traditional refractory insulation materials, reducing the smoke chamber temperature of the unit. Combined with the whole machine double-layer mirror aluminum foil silicate aluminum insulation, the heat loss of the unit is reduced to a minimum. A waste heat recovery device is set at the tail to reduce the flue gas temperature, realizing the release of sensible heat in the flue gas and latent heat in the water vapor, further improving the boiler efficiency. It has the characteristics of safety and durability, low-nitrogen condensation, convenient installation, precise control, and multi-purpose use. Liwei vacuum hot water boilers include gas vacuum hot water boilers, low-nitrogen condensing gas vacuum boilers, and electric vacuum hot water boilers.
Features of LewayWater-Tube Vacuum Hot Water Boiler
1. The water-tube vacuum boiler adopts transverse scouring of flue gas, with good boiler water circulation and high evaporation efficiency, greatly enhancing flue gas heat transfer.
2. Full premixed combustion technology, small furnace size, effectively reducing boiler volume, achieving ultra-low nitrogen emission, NOx emission less than 30mg/Nm3
3. The furnace body operates under slight negative pressure, with external pressure greater than internal pressure, high safety factor, exempt from approval, supervision and inspection, and no need to go through boiler use registration procedures.
4. Multi-purpose, one boiler can simultaneously provide heating water, domestic hot water, swimming pool heating, etc.
5. Integrated design of burner, boiler body, heat exchanger, and condenser, compact structure, convenient installation, easy operation and maintenance, saving investment and floor space, simple system, high efficiency, and more energy-saving operation.
6. Phase change heat transfer, heat medium water is softened, generally no need to replace or replenish, solving problems such as scaling and oxygen corrosion of conventional boilers, long service life.
7. Multiple safety protection interlocks such as furnace body overpressure protection, heat medium water and steam overtemperature protection, circulating water overtemperature protection and low temperature protection ensure safe and reliable operation of the unit.
8. Microcomputer programmable control mode, high degree of automation, simple operation, flexible control, multi-function touch screen, multi-window system working condition display, real-time display of boiler operating status.
9. The boiler can be modularly combined, and through the control of the visual intelligent software system, the overall heating load of the unit is adjusted to make the boiler unit operate efficiently.
Advantages of Low-Nitrogen Condensation Technology
High efficient
Adopting a three-pass structure, the smoke tubes use threaded smoke tubes to enhance heat transfer. The unique wet-back reburning chamber structure abandons traditional refractory insulation materials, reducing the smoke chamber temperature of the unit. Combined with the whole machine double-layer mirror aluminum foil silicate aluminum insulation, the heat loss of the unit is reduced to the limit. A waste heat recovery device is set at the tail to reduce the flue gas temperature, realizing the release of sensible heat in the flue gas and latent heat in the water vapor, further improving the boiler efficiency.
Durable
The interior of the boiler is an atmospheric sealed whole. During operation, oxygen in the intermediate medium water is precipitated and discharged out of the furnace. There will be no oxygen corrosion in the furnace for a long time. A small amount of heat medium water is added at one time, and the limited small amount of calcium and magnesium ions does not increase or decrease during operation. Therefore, the boiler does not scale, increasing the service life, which is 1.5~2 times that of ordinary boilers. The heat exchanger part is made of corrosion-resistant stainless steel tubes, with a designed service life of more than 20 years.
Multi-purpose
One unit can be equipped with multiple heat exchangers to supply hot water of different temperatures and different uses, such as central air-conditioning water, sanitary hot water, process hot water, etc. The company follows the "maximum energy configuration" principle to ensure that each heat exchanger can reach the maximum heat supply when supplying heat alone, so that users can obtain better results with minimal investment.
Safety
The pressure of the medium circulation system of the vacuum hot water unit is lower than atmospheric pressure. The internal absolute pressure during operation is 0.02~0.0655MPa. The unit is in a vacuum state, so there will be no explosion.
Low Nitrogen
The vacuum hot water boiler adopts a large furnace design with large combustion space and full combustion, equipped with imported low-nitrogen burners. Nitrogen oxide emissions can be as low as 30mg/Nm³.
The boiler is designed with a large furnace with large combustion space and is equipped with imported low-nitrogen burners. Nitrogen oxide emissions can be as low as 30mg/Nm.
Convenient
This series of boilers has a compact structure, convenient installation and transportation, symmetrical movable hinged front and rear smoke doors, convenient opening for inspection and cleaning. The rear smoke box is equipped with two doors, and the lower part is equipped with fire observation holes and inspection doors for easy inspection. The sturdy base can install the boiler on the foundation, and is equipped with a ladder for convenient installation of other auxiliary equipment.
Accurate Control
The PLC programmable controller fully automatically adjusts the operation according to load changes. The hot water temperature can be freely set between 20~90℃, and can automatically adjust the temperature to ensure constant temperature. The controller automatically detects faults of the burner and inside the furnace body and issues sound and light alarms. It controls the combustion time and automatically adjusts the entire process of first and second stage fire combustion, maintains normal operation, reduces the number of starts and stops caused by load changes, and reduces purge heat loss.
Investment Savings
1. The vacuum hot water boiler has a built-in heat exchanger, saving a large amount of auxiliary equipment investment and auxiliary equipment installation costs (saving primary circulating pump, plate heat exchanger, and corresponding pipes and valves, reducing electrical control system circuits), thereby saving investment.
2. With fewer auxiliary machines, the floor space is reduced. The vacuum hot water boiler room saves 30%-50% of the floor space compared with traditional boiler rooms, saving investment.
3. The vacuum hot water boiler is small in size, conducive to large-tonnage modularization, can utilize the load time difference, reduce the total load tonnage, facilitate capacity expansion, and save initial investment.
4. No need to go through registration, reducing registration fees. Installation and use procedures are very simple, no need for boiler inspection and boiler inspection report, no need for annual inspection. No need to equip certified boiler operators.
5. Not easy to scale, no oxygen corrosion, long service life, up to more than 20 years, which is 2 times the service life of ordinary boilers.
6. Advanced control, fully automatic operation. Multi-purpose, flexible selection. Built-in stainless steel heat exchanger ensures water quality and can directly supply sanitary domestic hot water.
