Shandong Zhongjie Special Equipment's main products include: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat boilers, and other boiler products; vacuum insulation cryogenic pressure vessels such as LNG tanks, oxygen/nitrogen/argon tanks, and CO2 tanks; pressure vessel products such as denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment; central air conditioning and HVAC equipment such as ground (water) source heat pumps, air source units, water-cooled screw units, and air-cooled modular units. Planned products include large-scale energy centers, LNG transport vehicles, LNG tank containers, and other green energy equipment.
Fully automatic biomass boiler systems commonly use a make-up water pump to maintain constant pressure, which is a typical water supply method. The specific working principle is as follows:
Feedwater Pump: The fully automatic biomass boiler is equipped with a feedwater pump, which is used to pump water from a water source (such as a water tank or tap water pipeline) into the boiler's supply system.
Pressure Control Method: The feed water pump employs a constant pressure method, which involves setting up a pressure sensor or controller in the boiler water supply system to monitor the pressure. When the pressure in the water supply system falls below the set value, the feed water pump will automatically start, replenishing water into the system to increase the pressure.
Pressure Control: The supply pump operates based on the set pressure range, and stops when the system pressure reaches the preset value to prevent overpressure.
Automation Control: The water supply system of an automatic biomass boiler is typically equipped with an automated control system that can intelligently manage based on the boiler's operating status and requirements. For instance, when the boiler needs to replenish water, the control system will automatically activate the feedwater pump to ensure the stable operation of the water supply system.
By utilizing a constant pressure supply pump method, the fully automatic biomass boiler can achieve automated control of the water supply system and stable water supply, ensuring the normal operation and safety of the boiler. This approach can be adjusted and optimized according to actual needs, enhancing water supply and energy utilization efficiency.

The SZL biomass boiler is a water-tube boiler with two drums and a chain grate, suitable for burning biomass fuel. Below is a structural introduction to the SZL biomass boiler:
Boiler Drum: The SZL biomass boiler features two parallel water pipes in the drum, known as the upper drum and the lower drum. The upper drum is used for the combustion chamber, while the lower drum is for the heat transfer of steam and flue gas.
Grate: The SZL biomass boiler utilizes a chain grate, through which the fuel enters the combustion chamber to achieve the combustion process. The design of the chain grate ensures uniform and complete combustion of the fuel.
Combustion Chamber: The combustion chamber is located within the upper cylinder, where the fuel is burned, releasing thermal energy. The structure and design of the combustion chamber ensure complete fuel combustion and efficient thermal energy conversion.
Flue Duct: The smoke produced by combustion enters the lower cylinder through the flue duct, where it exchanges heat with the water inside the pipes, transferring thermal energy to the water and generating steam.
Water pipes: A large number of water pipes are arranged inside the lower drum of the SZL biomass boiler. Flue gas passes through the pipes, where it exchanges heat with the water, transferring thermal energy and producing steam.
Upper Equipment: The upper equipment of the SZL biomass boiler includes steam separators, level gauges, safety valves, etc., which are used for controlling and protecting the safe operation of the boiler.
Equipment: The SZL biomass boiler also includes equipment such as the feedwater system, sewage system, and fuel supply system, which are used to provide the boiler with water, treat wastewater, and supply fuel, etc.
The SZL biomass boiler features a compact structure and high thermal efficiency, suitable for the combustion of biomass fuel. Its dual drum and chain grate design ensures complete combustion of the fuel and efficient heat conversion, while also offering good safety and reliability.

The utilization of waste heat from biomass boilers is an important means to improve energy efficiency and reduce energy consumption and emissions. The following are some common applications and analyses of waste heat recovery technologies in biomass boilers:
Eco-friendly Air Preheater: Biomass boiler combustion generates flue gas containing a significant amount of heat. The eco-friendly air preheater recovers and utilizes this excess heat, preheating the air entering the boiler to enhance combustion efficiency. By recovering waste heat, fuel consumption can be reduced and flue gas emissions minimized.
Economizer: An economizer is a device used to recover waste heat from flue gas, transferring the heat from the flue gas to the boiler feed water to increase its temperature and reduce fuel consumption. The application of an economizer can effectively lower the flue gas temperature from the boiler and improve thermal efficiency.
Waste Heat Boiler from Biomass Boiler Flue Gas: This is a device that utilizes the waste heat from the flue gas of biomass boilers to generate steam or hot water. By converting the waste heat in the flue gas into usable thermal energy, it achieves the reuse of energy and improves energy utilization efficiency.
Direct Utilization of Flue Gas: The waste heat from biomass boiler flue gas can be directly used for heating or drying processes, reducing the demand for other energy sources. For instance, the flue gas can be transported through chimneys or pipelines to the locations requiring heating, and the thermal energy of the flue gas can be utilized directly.
Flue Gas Heat Recovery System: The flue gas heat recovery system recovers and utilizes the excess heat from biomass boiler flue gas to supply other equipment or systems, such as air conditioning, heating, and hot water. This enables comprehensive energy utilization and improves overall energy efficiency.

Biomass boilers and coal-fired boilers differ in terms of fuel, environmental performance, and sustainability.
Fuel Type: Biomass boilers utilize renewable biomass fuels such as wood chips and straw, whereas coal-fired boilers use fossil fuels like coal. Biomass fuels are renewable and have low carbon characteristics, while coal is a finite resource and burning it produces a large amount of carbon dioxide and other pollutants.
Environmental Performance: Biomass boilers emit relatively fewer pollutants during combustion, such as carbon dioxide, nitrogen oxides, and particulates. In contrast, coal-fired boilers release more pollutants, including nitrogen oxides, particulates, and heavy metals, which have a significant impact on both atmospheric environment and human health.
Sustainability: Biomass fuel is a renewable resource that can be cultivated and recycled through regenerative cycles, offering good sustainability. In contrast, coal is a finite resource, and its mining and combustion can cause environmental damage.
Combustion Efficiency: The combustion efficiency of biomass boilers is relatively low due to the complex chemical and physical properties of biomass fuel, which easily leads to ash and carbon accumulation during combustion. In contrast, coal-fired boilers have a higher combustion efficiency, as the chemical properties of coal fuel are relatively stable, resulting in a more complete combustion process.
Technical Requirements: Biomass boilers compared to coal-fired boilers
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