Shandong Zhongjie Special Equipment Co., Ltd. (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan Road, Development Zone, Heze City, with a registered capital of 50 million yuan and total assets of 500 million yuan. The company has 7 business centers: boilers, deep-freezing containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three factory sites on Jinnan Road, East Changjiang Road, and Bohai Road, covering a total area of 200,000 square meters, with the main workshop spanning 83,000 square meters. It currently employs 710 people, including 247 engineering and technical staff and 82 middle-level technical personnel. In December 2016, it was recognized as a "High-tech Enterprise" by the Science and Technology Department. In June 2021, it was identified as a "Specialized and New Enterprise in Shandong Province" by the Department of Industry and Information Technology. In June 2022, it was recognized as a "Gazelle Enterprise in Shandong Province" and in August 2022, as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
The phenomenon of damaged economizer tubes in biomass boilers may include the following situations:
Pipe Corrosion: Flue gases produced by biomass combustion contain certain acidic substances, which may lead to corrosion of the economizer pipes. Long-term corrosion can result in reduced wall thickness of the pipes, the formation of holes and cracks.
Pipe blockage: During biomass combustion, flue gas may contain some ash and particulate matter, which may settle and accumulate in the economizer pipes, leading to blockages. Blockages can affect the flow of flue gas and reduce heat exchange efficiency.
Pipe fatigue: Due to the significant temperature and pressure fluctuations during biomass boiler operation, long-term thermal expansion and contraction can lead to fatigue damage in the economizer pipe, such as cracking and deformation.
In response to the aforementioned issues, the following solutions can be adopted:
Enhanced Corrosion Protection: Apply corrosion-resistant coatings or use materials that resist corrosion for the economizer piping to minimize corrosion occurrence.
Regular cleaning and maintenance: Regularly clean and maintain the economizer to prevent the accumulation of ash and particles within the pipes, which can lead to blockages. Methods such as mechanical cleaning and water flushing can be employed.
Enhanced Monitoring and Inspection: Regularly inspect economizers, including thickness measurements of pipes and crack detection, to promptly identify issues and implement repair measures.
Optimize operating parameters: Reasonably adjust the operating parameters of the biomass boiler, such as combustion temperature and air volume, to minimize damage to the economizer.

Slagging in biomass boiler furnace is caused by the ash and other impurities in biomass fuel forming slag during the combustion process, which then settle in the furnace. The following are some operational factors that affect slagging in biomass boiler furnaces:
Fuel Characteristics: Different types of biomass fuel have varying ash content, ashing temperature, and ashing properties. Fuel with high ash content tends to produce large amounts of ash and slag, while fuel with lower ashing temperatures is prone to slagging inside the furnace.
Combustion Temperature: Combustion temperature is a significant factor affecting slagging in biomass boiler furnace. An excessively low combustion temperature can lead to incomplete fuel combustion and insufficient melting of ash, increasing the likelihood of slagging.
Air Supply: Excessive air supply can lower combustion temperatures, increase the time fuel stays in the furnace, and raise the risk of slagging. At the same time, insufficient air supply can also lead to incomplete fuel combustion, increasing the generation of ash and slag.
Furnace Design: The design of the furnace chamber significantly impacts the air flow distribution and temperature distribution within. A well-designed furnace chamber promotes complete combustion of fuel and the expulsion of ash, reducing the likelihood of slagging.
Ash Cleaning System: The performance and operation of the ash cleaning system also affect the slagging condition in the furnace. Regularly cleaning the ash and accumulated dust inside the furnace maintains the furnace's ventilation.

Slagging in biomass boilers refers to the solid residue formed from ash and other impurities in the fuel during the combustion process at high temperatures. Slagging is a common issue in biomass boiler operation, which may affect the boiler's heat transfer and combustion efficiency. Here is a brief discussion on slagging in biomass boilers:
Reason for slagging: The biomass fuel contains a high ash content, and the ash may include some sticky substances. These substances melt and adhere to the heat exchange surface of the boiler at high temperatures, forming slag. Additionally, certain elements in the biomass fuel, such as calcium, can also promote the formation of slag.
slagging effects: Slagging can obstruct heat transfer in boilers, reduce combustion efficiency, and increase energy consumption. It can also lead to increased temperatures in the boiler, accelerate corrosion of metal materials, and shorten the boiler's lifespan.
Preventive and Treatment Measures: To prevent and address slagging issues in biomass boiler systems, the following measures can be adopted:
Fuel Pretreatment: Pre-treat biomass fuel, including drying, screening, and decontamination, to reduce ash and salt content in the fuel, and minimize slagging risks.
Regulate combustion conditions: Reasonably control parameters such as the temperature, oxygen content, and combustion rate of biomass combustion to avoid excessive temperatures and oxygen levels, and reduce slag formation.
Cleaning and Maintenance: Regularly clean the internal soot and dirt of the boiler to maintain its cleanliness. During the cleaning process, use appropriate cleaning agents and tools to remove internal dirt and prevent slagging from forming.

Brief steps for biomass boiler drying oven:
Prepare Fuel: Select suitable biomass fuel such as sawdust and straw, and conduct preliminary processing like drying and sieving to ensure the fuel quality and meet the furnace requirements.
Ignition and Ignition Adjustment: Place the fuel into the combustion chamber of the biomass boiler, ignite it, and adjust the ignition. Adjust the oxygen supply, fuel supply, and combustion temperature parameters of the combustion chamber to ensure stable combustion.
Heating and Temperature Control: As the fuel burns, biomass boilers produce high-temperature flue gas. The heat energy from the flue gas is transferred to the drying kiln through a heat exchanger. During the heating process, it is necessary to control the temperature of the drying kiln to ensure that the materials inside receive adequate heating.
Furnace Operation and Monitoring: During the furnace heating process, operation and monitoring are required. Operations include controlling fuel supply, heat transfer, and the movement of materials inside the furnace. Monitoring involves tracking parameters such as furnace temperature, pressure, and combustion efficiency to ensure normal operation and safety.
Furnace completion and cleaning: Upon completion of the furnace heating or achievement of the required effect, stop fuel supply and heating, and carry out the furnace completion procedures. Afterward, the furnace and biomass boiler, combustion chamber, and flue need to be cleaned.
Our company places great emphasis on technological innovation and R&D, boasting one municipal-level enterprise technology center in Heze City. We have established testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, and more. We are equipped with over 600 pieces of equipment, including CNC machine tools, X-ray flaw detectors, digital ultrasonic flaw detectors, mechanical property testing machines, chemical analyzers, spectrometers, tensile testing machines, plasma welding machines, and others. Our R&D of key products such as temperature-pressure vessels for welding, biomass boiler emissions reduction, and waste heat utilization has been selected for multiple Shandong Provincial Department of Industry and Information Technology science and technology projects, Shandong Provincial key projects, and Heze City innovation and excellence projects. We have cumulatively obtained 27 authorized utility model patents, 16 authorized invention patents, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. Our technical team, in collaboration with Professor Li Yajiang of Shandong University, has developed deep cryogenic container processing technology using the international plasma arc + filler wire argon arc welding (PAW-GTAW) technique. After provincial-level scientific and technological achievement identification, our technology level has reached international standards in the field of deep cryogenic container manufacturing. Choose ZJ Special Equipment, and let's create brilliance together!