oil fired hot water boiler, the technicians of ZOZEN boiler deeply explain the principle
The primary purpose of the boiler is to supply energy to the facility's operations – for comfort heating, manufacturing process, laundry, kitchen, etc. The nature of the facility's operation will dictate whether a steam or hot water boiler should be used. Hot water is commonly used in heating applications. Under these conditions, there is a wide range of ZOZEN hot water boiler products available.

oil fired hot water boiler, ZOZEN WNS series gas-fired (oil-fired) boilers are wetback fire-tube boilers with a two-pass or three-pass design. It uses threaded smoke tube for heat transfer and manages to achieve a thermal efficiency up to 98%. The economizer is installed at the tail of boiler, giving the boiler a compact size. Meanwhile, sound automatic control system enables unattended operation.
PT.Sari Incofood Corporation is a leading manufacturer of instant coffee drink in Indonesia. The company was eager to upgrade renew backward equipment. Among them, the steam boiler provides heating support for the production process of coffee pulping, liquid coffee concentrating and coffee freeze drying. To meet the requirements of the actual production line, ZOZEN recommended the SZL series water tube boiler for the company. The boiler has been stably running up to now, so the company spoke highly of ZOZEN products and technology.
ZOZEN SZS series boiler body is designed with D-type chamber combustion structure. The furnace is on right side and the convection heating surface is on left side. The membrane type structure is adopted for the circumference of the furnace body, the wall between the furnace and the convection zone, the front and rear walls of boilers body. The furnace pressure is designed to be greater than 6000Pa.
ZOZEN is the first in China to adopt arched tube sheet and threaded smoke tube structure. Threaded smoke pipe is a high-efficiency heat transfer element researched by ZOZEN for many years. After continuous optimization, its heat transfer coefficient is 1.8 times higher than that of ordinary smoke pipe, which increases heat conduction.
ZOZEN Boiler provides temporary and permanent solutions with our profession for industrial boilers to meet the most stringent emissions requirements. If you need more information, please contact us today.
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IntroductionIn Wuhan, Hubei Province, Hubei Hanjia New Materials Co., Ltd. and Wuhan Yiqingsheng Building Materials Co., Ltd. required thermal energy equipment for autoclave curing and continuous production-line heating, respectively. Based on the production processes, fuel conditions and site requirements of the two companies, ZOZEN Boiler supplied an 8 t/h DZL series biomass steam boiler and a 7.2-million-kcal YWW series biomass thermal oil boiler. The two projects use different heat-transfer ...03 Nov 2026 -
At Guizhou Haocaitou Food Co., Ltd. in Tongren, Guizhou Province, a ZOZEN WNS series gas-fired steam boiler has been operating for five years as part of the company’s steam supply system. The WNS10-1.25-Q boiler, with a rated capacity of 10 t/h, serves as an important heat source for food production. In recent feedback, the customer noted that matching the equipment configuration to production requirements, along with ease of daily operation and maintenance, were key considerations when se...27 Oct 2026 -
From beverage and convenience food production to rice processing, boiler solutions should be selected according to fuel availability, steam demand and site conditions. Steam is commonly used for heating, sterilization and equipment cleaning in food processing. However, different products, production line configurations and fuel conditions create different boiler requirements. In addition to rated steam capacity, food manufacturers need to consider steam pressure, fuel supply, equipment layout a...20 Oct 2026
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