steam boiler working principle, ZOZEN steam boiler types and parameters
As we all know, the steam boiler is a kind of essential equipment in the production process of many enterprises. It is mainly used in the processes such as drying, disinfection, sterilization, distillation and so on. It is widely used in various industries such as food, paper, construction, cables, electronics, tobacco, textile and so on. So, what is the steam boiler working principle? Hereby, ZOZEN Boiler will specifically introduce the steam boiler working principle and relevant ZOZEN steam boiler types and parameters for you.
1. steam boiler working principle
The heat released by the fuel combustion in the furnace heats the water in the pot to vaporize it into the steam. The water in the pot (drum) is continuously heated by the energy released by the combustion of gas fuel in the furnace, then the water temperature rises and pressurized steam generates. Because the boiling point of water rises with the increase of pressure and the pot is sealed, the expansion of steam inside is restricted, which results in the generation of pressure and the formation of thermal power (strictly speaking, the steam in the boiler is formed by the water which is heated with pressure to be saturated water which is further vaporized) as a kind of energy used widely. This is the steam boiler working principle.

ZOZEN WNS series two-pass steam boiler working principle diagram
2. ZOZEN steam boiler types and parameters
Based on the steam boiler working principle and according to different boiler fuels, ZOZEN steam boilers can be divided into: gas/oil-fired steam boilers, coal-fired steam boilers and biomass-fired steam boilers.
1) gas/oil fired steam boilers

ZOZEN gas-fired boilers adopt the large furnace design and have the characteristic of fully automatic operation. They can realize the highly efficient, energy-saving and safe operation. The front and rear smoke boxes have special sealing structure to prevent leakage.
|
Boiler Type |
Capacity |
Pressure |
Thermal Efficiency |
|
WNS series gas/oil-fired steam boiler |
1-20tph |
0.7-2Mpa |
≥98% |
|
SZS series gas/oil-fired steam boiler |
20-110tph |
1.25-5.3Mpa |
≥98% |
More products: https://en.zozen.com/products/gas-fired-boiler
Case: 1.5tph WNS series oil-fired steam boiler for the food industry in Venezuela
2) coal-fired steam boilers

ZOZEN coal-fired boilers adopt featured grate segments to ensure the stable operation of grate. The combustion-supporting air system adopts independent air chambers and a scientific sealing structure. There is also a reasonable air regulating device to improve the combustion efficiency.
|
Boiler Type |
Capacity |
Pressure |
Thermal Efficiency |
|
DZL series coal-fired steam boiler |
2-20tph |
1-2.5Mpa |
≥82% |
|
SZL series coal-fired steam boiler |
4-35tph |
1-2.5Mpa |
≥82% |
|
DHL series coal-fired steam boiler |
20-75tph |
1.25-5.4Mpa |
≥82% |
|
SHX series coal-fired cfb steam boiler |
10-75tph |
1.25-2.45Mpa |
≥89% |
|
DHX series coal-fired cfb steam boiler |
35-75tph |
1.25-5.3Mpa |
≥89% |
More products: https://en.zozen.com/products/coal-fired-boiler
Case: 6tph SZL series packaged chain grate steam boiler project in Bangladesh
3) biomass-fired steam boilers

ZOZEN biomass-fired boilers are designed with the reasonable structure according to different fuel characteristics to ensure the sufficient combustion of fuel. They also solve the problems such as scaling, coking, abrasion, front arch and hopper burn-out and so on.
|
Boiler Type |
Capacity |
Pressure |
Thermal Efficiency |
|
DZL series biomass-fired steam boiler |
2-20tph |
1-2.5Mpa |
≥88% |
|
SZL series biomass-fired steam boiler |
4-35tph |
1-2.5Mpa |
≥88% |
|
DHL series biomass-fired steam boiler |
20-75tph |
1.25-5.4Mpa |
≥88% |
More products: https://en.zozen.com/products/biomass-fired-boiler
Case: 20 tph SZL series biomass fired boiler project for rubber industry in Thailand
https://en.zozen.com/cases/20-tph-szl-series-biomass-fired-boiler-project-for-rubber-industry.html
ZOZEN Boiler is established in 1988. After 30 years of professional R&D and manufacturing, ZOZEN has become a leader in the domestic industrial boiler industry. ZOZEN Boiler has a deep understanding of the steam boiler working principle and conducts innovations based on the traditional steam boiler manufacturing process to ensure that each set of ZOZEN steam boiler has excellent quality and performance. What's more, ZOZEN Boiler can customize the steam system solutions for users to help them achieve the goal of energy saving and consumption reduction.
This is the steam boiler working principle and relevant steam boiler types and parameters shared by ZOZEN Boiler. I believe that you should have a certain understanding of the steam boiler working principle. If you have more questions about the steam boiler working principle and relevant steam boiler types and parameters, please leave your message or consult ZOZEN Boiler directly.
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At the production site of a pharmaceutical company in Shanghai, a ZOZEN gas-fired steam boiler commissioned in 2010 has been operating steadily for 16 years. For this established pharmaceutical company, founded in 1995, the steam system is closely related to production rhythm, process coordination, and on-site operation support. Whether the equipment can maintain stable operation over the long term directly affects the continuity of daily production. Time is a practical test, and the continuous ...07 Jul 2026 -
As the beer industry moves toward greener, more continuous, and more refined production, the steam system has become an important part of brewing operations. Recently, the cooperation case between ZOZEN Boiler and Yanjing Beer (Guilin Liquan) Co., Ltd. once again highlighted the essential role and system value of industrial boiler equipment in the food and beverage industry. Industrial Heat and Beer Brewing Are Closely Connected From a Drop of Beer, the Value of Stable Steam Becomes ClearYan...24 Jun 2026 -
Recently, ZOZEN Boiler delivered a 3-ton WNS series skid-mounted steam boiler to a stationery products manufacturer in Thailand. The customer mainly produces solid glue, crayons, oil pastels and other stationery products. During production, the customer has clear requirements for continuous and stable steam supply. Based on the customer’s process features and site conditions, ZOZEN Boiler adopted a skid-mounted delivery solution, integrating the boiler body and auxiliary equipment to suppo...16 Jun 2026
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