Industrial and Commercial Low-Noise Intelligent Control Safe Water-Cooled Low-Nitrogen Vacuum Phase Change Gas Boiler for Hospitals/Hotels/Apartments

• Customization: Available
• Function: Water Boiler, Hot Water Boiler
• Fuel: Gas-Fired
• Model NO.: YHZQ
• Installation: Packaged Boiler
• Structure: Fire Tube
• Media: Hot Water
• Water Circulation: Forced Circulation
• Drum Placement: Horizontal Boiler
• Pressure: None
• Manufacturing Level: B
• Burning Style: Chamber Combustion Boiler
• Usage: Industrial, Power Station, Commercial
• Rated Heat Input (MW): 0.35-28
• Gas Supply Pressure (12t) / Kpa: 3-20
• Nox Emission (Mg/Nm³): <30
• Maximum Gas Flow Rate (Nm³/H): 35-2800
• Reference Heating Area (M²): 2900-800000
• Water Capacity (Kg): 343-14280
• Transport Package: Overall Transportation
• Specification: 350-28000kW
• Trademark: aikeduo
• Origin: China
• Production Capacity: 2, 000 Units/Year

Product Description

Product Description

Relevant Definitions

Phase Change Boilers: Boilers where, under the condition that there is no non-condensable gas in the boiler  (boiler body) or the partial pressure of non-condensable gas (absolute pressure) is close to zero, the internal medium continuously transfers absorbed heat to the output working medium (e.g., water) in the heat exchange tube through a gas-liquid two-phase cycle of continuous evaporation and condensation.

Types of Phase Change Boilers:
Vacuum Phase Change Boilers: Phase change boilers where the rated steam pressure of the internal medium is lower than local atmospheric pressure (gauge pressure < 0MPa).
Low-Pressure Phase Change Boilers: Phase change boilers where the rated steam pressure of the internal medium is higher than local atmospheric pressure but less than 0.1MPa (gauge pressure < 0.1MPa).
Pressure Phase Change Boilers: Phase change boilers where the rated steam pressure of the internal medium is ≥ 0.1MPa.

Working Principle:A vacuum hot water unit operates based on the principle that water boils to produce steam at low temperatures under low pressure, and heat is transferred through steam-water condensation. The internal closed chamber of the unit is evacuated to form a vacuum cavity. Combustion causes the heat-transfer water in the vacuum cavity to boil and vaporize, generating negative-pressure water vapor. The steam condenses outside the heat exchanger tubes, heating the cold water inside the tubes and delivering it to users. After condensation, the water vapor forms droplets that flow back into the heat-transfer water to be reheated and vaporized, completing the entire cycle. The boiler water continuously undergoes a phase change of "vaporization → liquefaction" within the closed boiler body and heat exchanger, known as phase transformation, while simultaneously cycling through "heat absorption → heat release" to heat the water in the heat exchanger.

Heat-Transfer Water:It circulates closed within the unit (vaporization → condensation → vaporization), with no increase or decrease in quantity. It does not need to be replaced during the normal service life of the unit.

The characteristics of the burner

1. The air and gas are fully premixed in advance, resulting in high combustion efficiency.

2. It is equipped with a variable - frequency fan, enabling stepless speed adjustment. The power can be adjusted as needed, reducing the number of boiler start - stops.

3. The water - cooled combustion method reduces the flame temperature, achieving ultra - low emissions (nitrogen oxides < 15mg/m³).

4. It has a lower air coefficient and a constant air - fuel ratio. Compared with diffusion combustion, it has higher efficiency under low - load conditions.

5. Compared with metal fiber burner heads, it has larger apertures and is less prone to blockage. 

Features of Fully Premixed Water-Cooled Burners

Water-cooled Combustion Principle:  By cooling the burner head with water to lower the flame temperature, this principle inhibits the formation of nitrogen oxides, achieving low NOx emissions. Structurally, it prevents the risk of flashback and can further reduce oxygen content to improve efficiency.  

Advantages of Water-Cooled Low NOx Burners:  Compared with metal fiber burner heads, they have larger apertures, are less prone to blockage, offer wider adaptability, and require extremely low maintenance frequency, making them more suitable for domestic use environments.

Boiler Body

The main body of the vacuum hot water boiler is divided into two parts:the upper and lower sections.

Upper Section (Condensation Chamber/Negative Pressure Steam Chamber): Contains a tubular steam-water heat exchanger, which heats the circulating water flowing through the heat exchanger.

Lower Section: Adopts a unidirectional flow structure to transfer the heat of high-temperature flue gas to the boiler water.

Introduction to Key Components

Electrical  control box:

Integrally control the operation of the boiler and check the boiler status.

Vacuum pump:

Compact appearance,smaller and lighter integral cylinder structure, high precision and more stable performance.

Condensation chamber:

High-temperature steam condenses on the surface of the tube bundle, releasing heat that is transferred to the circulating water. A built-in phase-change heat exchanger is included, eliminating the need for installing a plate heat exchanger.

One unit can be configured with multiple groups of heat exchangers to simplify the system and save investment.

Mixer:

Mixing air and gas in advance results in higher combustion efficiency.

Variable  frequency fan:

It realizes stepless speed regulation, adjusts power on demand, and reduces the number of boiler start-stops.

Condenser:

Reduce flue gas temperature and release latent heat, Improve the overall efficiency of the unit and significantly save energy consumption.

Water-cooled low-nitrogen burner:

Reduce flame temperature,High-performance combustion improves combustion efficiency,Ultra-low nitrogen oxide emissions, low-nitrogen and environmentally friendly.

Heat exchanger:

Tube - type structure with small water capacity enables faster start - up. Unidirectional flow structure makes it difficult for natural gas to accumulate in the furnace body, ensuring high safety.

Condensing type

Non-condensing type

Specification

Model (Condensing Type)	Rated Heat Input (Mw)	Gas Supply Pressure (12T)/KPa	Maximum Gas Flow (Nm³/h)	Electrical Power (w)	Water Capacity (kg)	Reference Heating Area (m2)	Gas Pipeline Diameter (mm)	Flue Pipe Diameter (mm)	Operating Weight (Approx.) T
YHZQ-L- 350KW	0.35	3---5	35	1000	343	2900--10000	DN32	φ200	1.65
YHZQ-L- 700KW	0.7	3---5	70	1700	537	5800--20000	DN40	φ250	2.5
YHZQ-L- 1050KW	1.05	3---5	105	3100	736	8700-30000	DN50	φ315	3.2
YHZQ-L- 1400KW	1.4	3---5	140	3600	882	12000--40000	DN50	φ315	3.7
YHZQ-L- 2100KW	2.1	15---20	210	8000	1214	17000-60000	DN50	φ450	6.2
YHZQ-L- 2800KW	2.8	15---20	280	11500	1563	23000-80000	DN65	φ500	7.3
YHZQ-L- 4200KW	4.2	15---20	420	15500	2258	34000--120000	DN65	φ600	10.5
YHZQ-L- 5600KW	5.6	15---20	560	22500	2914	46000-160000	DN80	φ700	13.5
YHZQ-L- 7000KW	7.0	15---20	700	30500	3570	58000-200000	DN100	φ800	16.5
YHZQ-L- 10500KW	10.5	15---20	1050	45600	5300	90000-300000	DN125	φ1000	24.5
YHZQ-L- 14000KW	14.0	15---20	1400	55700	7030	120000-400000	DN150	φ1200	32.5
YHZQ-L- 28000KW	28.0	15---20	2800	90700	14280	240000-800000	DN200	φ1400	52.1

Model (Non-condensing Type)	Rated Heat Input (Mw)	Gas Supply Pressure (12T)/KPa	Maximum Gas Flow (Nm³/h)	Electrical Power (w)	Water Capacity (kg)	Reference Heating Area (m2)	Gas Pipeline Diameter (mm)	Flue Pipe Diameter (mm)	Operating Weight (Approx.) T
YHZQ- 350KW	0.35	3---5	35	1000	343	2900- 10000	DN32	φ200	1.54
YHZQ- 700KW	0.7	3---5	70	1700	537	5800- 20000	DN40	φ250	2.3
YHZQ- 1050KW	1.05	3---5	105	3100	736	8700- 30000	DN50	φ315	3
YHZQ- 1400KW	1.4	3---5	140	3600	882	12000- 40000	DN50	φ315	3.3
YHZQ- 2100KW	2.1	15---20	210	8000	1214	17000- 60000	DN50	φ450	5.7
YHZQ- 2800KW	2.8	15---20	280	11500	1563	23000- 80000	DN65	φ500	6.8
YHZQ- 4200KW	4.2	15---20	420	15500	2258	34000- 120000	DN65	φ600	10
YHZQ- 5600KW	5.6	15---20	560	22500	2914	46000- 160000	DN80	φ700	12.8
YHZQ- 7000KW	7.0	15---20	700	30500	3570	58000- 200000	DN100	φ800	15.5
YHZQ- 10500KW	10.5	15---20	1050	45600	5300	90000- 300000	DN125	φ1000	23
YHZQ- 14000KW	14.0	15---20	1400	55700	7030	120000- 400000	DN150	φ1200	30.5
YHZQ- 28000KW	28.0	15---20	2800	90700	14280	240000- 800000	DN200	φ1400	48.5

Company Profile

Shandong Aike Duo Thermal Energy Technology Co., Ltd. was founded in 2008 and is located at the foot of the majestic Mount Tai. It is a leading integrated gas heating service provider in China. For more than a decade, "Aike Duo" has always adhered to the corporate vision of "building the first brand of gas heating in China and becoming the best clean heating supplier in China", and is committed to the research and production of "gas heating equipment" as well as the promotion and implementation of "distributed clean heating" solutions.

 

Through years of sharpening, Aike Duo has always moved forward with honors and has now grown into a "national high - tech enterprise" integrating production, research, and sales. It has multiple automated production lines and inspection lines, and has transformed into an automated digital factory. The production capacity of gas wall - hung boilers exceeds 600,000 units, and the annual production capacity of various types of industrial and commercial gas boilers is 10,000 units. It is the largest distributed gas heating equipment production base in northern China.

 

Aike Duo pursues the green production concept of low carbon and energy conservation, and upholds the scientific outlook on development that is responsible for society, the environment, and the economy. It has successively been awarded the titles of "Energy Conservation and Low Carbon Demonstration Park" and "Circular Economy Demonstration Park". Aike Duo took the lead in obtaining the Class B boiler production qualification in the wall - hung boiler industry and currently holds more than 80 national patents and dozens of industry and national honors.

Research and Development Center

Production Workshop

Production Workshop

Our Advantages

Quality Assurance:

Professional Advantages:

Price Advantages:

The products are qualified in quality and undergo factory testing. Any product can be certified according to customer requirements.

Nearly 20 years of experience in R&D and manufacturing of gas equipment.

High-quality and affordable, providing thoughtful services for every customer.

OEM Services:

After-Sales Advantages:

Large Scale:

Tailor-made according to customer needs.

Long-term after-sales service is provided for all equipment.

Factory area: 23,025m², production center: 18,000m², R&D center: 8,000m².

Certifications

Packaging & Shipping

After Sales Service

We provide comprehensive after-sales guarantee services for our products. 

For faults caused by non-human factors during the warranty period, we offer free maintenance;

after the warranty period, we provide lifelong maintenance, and only charge cost fees for the services.

FAQ

1.How many years is the product warranty?

The warranty period for household products is five years; for industrial and commercial products, it is two years.

2.Can this product be customized according to requirements?

Customization is supported. We can carry out personalized customization of products according to your drawings and requirements.

3.Why choose us?

Good product quality, reasonable and competitive prices.
Nearly 20 years of manufacturing experience with a mature product line.
OEM and ODM services can be tailored to your needs.
4.Are you a manufacturer or a trading company?
We are a manufacturer and source factory with nearly 20 years of manufacturing experience. You are welcome to visit and inspect our facilities.
5.If we purchase your products, what quality guarantees do you offer?
The components we use have passed our rigorous testing.
We have a strong QC team to control the quality of each production process.
Our philosophy is "credibility first, customer first, and quality satisfaction."