Vacuum hot water boiler-Fornitore globale

A vacuum hot water boiler creates a closed vacuum environment inside by pre vacuuming, and then fills the body with hot coal water. The heat medium water generates negative pressure steam through heating, and the heat generated by the condensation of negative pressure steam heats the cold water inside the heat exchange tube, continuously providing hot water to the user. During the operation of the boiler, the boiler water is only enclosed in the vacuum chamber, without entering, exiting, increasing, or decreasing, and heat is transferred between the heat transfer tubes and the heat exchanger. Therefore, boilers have the characteristics of easy installation, maintenance, environmental protection and energy saving, and are widely popular in the market.

Like other ordinary boilers, the lower part of a vacuum hot water boiler is composed of a combustion chamber and heat transfer tubes. The only difference is that the upper part of a vacuum hot water boiler is a vacuum steam chamber, in which a U-shaped or straight tube heat exchanger is inserted. It operates under negative pressure and is absolutely safe. At the same time, it can also be used for multiple purposes, providing customers with hot water of different temperatures and purposes at the same time, meeting their various needs and reducing their investment in boiler costs.

Performance advantages

The unique pulse water level detection circuit structure ensures reliable performance.

The heat exchanger is made of high-quality stainless steel, which is corrosion-resistant.

Boilers have multiple uses, and one boiler can be equipped with multiple heat exchangers to supply hot water of different temperatures and purposes.

The vacuum hot water boiler has a compact structure, small volume, and saves floor space.

Hot coal water circulates in a closed space with minimal loss.

The control part uses advanced controllers that can automatically detect the temperature of the boiler water and the outlet water.

The vacuum hot water boiler adopts a three pass structure and a unique wet back combustion chamber structure, abandoning traditional refractory insulation materials and reducing the temperature of the unit's front smoke chamber.

Hot coal water is high-purity water that has undergone special treatments such as softening, deoxygenation, and desalination. Therefore, the interior of vacuum hot water boilers does not scale or corrode, increasing their service life.

Technical Parameter

Project/Model		ZKW0.7-8560-Y(Q)	ZKW1.05-8560-Y(Q)	ZKW1.4-8560-Y(Q)	ZKW1.75-8560-Y(Q)	ZKW2.1-8560-Y(Q)	ZKW2.8-8560-Y(Q)	ZKW3.5-8560-Y(Q)
Heat medium water capacity (L)		410	520	568	700	830	980	1250
Rated heat generation (Mw/h)		0.7	1.05	1.4	1.75	2.1	2.8	3.5
Rated heat generation		60	90	120	150	180	240	300
Fuel	Light diesel oil (Kg/h)	64	96	128	160	192	256	320
	Heavy oil (Kg/h)	67.3	100	134	168	202	269	363
	Natural gas (m3/h)	165	116	155	193	232	310	387
	City gas (m3/h)	77	247	330	412	494	659	824
	Liquefied gas (m3/h)	29	44	58	73	88	117	146
heat exchanger	Material/Structure	stainless steel; Straight pipe
heat exchanger	Work pressure (MPa)	1.0
Dedicated for heating	Maximum heat generation	36	54	72	90	108	144	180
	Warm water circulation volume	36	54	72	90	108	144	180
	pressure loss	2.2	3.0	2.0	2.6	2.5	3.5	3.3
	Heating outlet (DN)	65	80	80	100	125	125	133
	Heating area (㎡)	6000	9000	12000	15000	18000	24000	30000
Hot water dedicated	Maximum heat generation	24	36	48	60	72	96	120
	Heating water volume (m3/h)	6	9	12	15	18	24	30
	Hot water temperature	50
	pressure loss	2.0	0.6	1.5	1.8	1.5	1.8	2.0
	Discharge diameter (DN)	40	65	65	80	100	100	125
voltage	Voltage (V)	220/380
	Power Consumption	2.2（2.6）	3.7（4.1）	5.0（6.5）	7.5（9）	11（2.5）	15（16.5）	18.5（20）
	Power consumption of blower	2.2	3.7	5.0	7.5	11	15	18.5
	Oil pump power consumption	0.4	0.4	1.5	1.5	1.5	1.5	1.5
size	Chimney diameter (mm)	350	350	400	450	500	550	600
	Length (m)	2700	3200	3400	4050	4700	4900	5500
	Width (m)	1365	1365	1600	1600	1600	1800	2020
	Height (m)	2345	2400	2500	2580	2580	2630	2700

Working principle

1. Boiler body: The combustion heating part of the vacuum phase change boiler body is made of high-quality Q235 plate and 20 # steel pipe material. The advantage is a large combustion chamber and a low heat load on the boiler furnace. The heating surface is large, the volume is small, the structure is compact, and the water capacity is small, resulting in a fast heating rate. In addition, the negative pressure evaporation chamber integrated in the upper part has stable performance and reliable operation. Due to the large space of the negative pressure evaporation chamber, the inserted heat exchanger can be manufactured according to the user's needs. Generally, horizontal boilers use straight tube heat exchangers, with detachable end heads and connecting pipes for easy maintenance and cleaning of the heat exchanger water pipes.

2. Manufacturing and construction of heat exchanger: The heat exchanger is made of stainless steel material, inserted into the negative pressure evaporation chamber in a bundle manner, and connected at both ends with flanges. Its advantages: easy disassembly, simple replacement, not easily corroded, easy maintenance and cleaning, durable.

3. Automation control: Advanced controllers are selected for the control part to automatically detect the temperature of the boiler water and the outlet water; Automatically detect faults inside the burner and furnace body; The combustion time can be controlled through program settings; Being able to automatically adjust the entire combustion process according to changes in load, reducing the number of starts and stops caused by changes in load, ensuring the normal operation of the boiler, and reducing the loss of blowing heat during start-up and shutdown.

4. Combustion equipment: Due to the special design of vacuum phase change boilers, various imported and domestic fuel and gas burners can be configured through dedicated installation plates according to fuel types and user needs.