Shandong Zhongjie Special Equipment Co., Ltd. (formerly Heze Boiler Factory Co., Ltd.) holds an A-grade boiler manufacturing license, an A2-grade pressure vessel manufacturing license, an A2-grade pressure vessel design license, B-grade boiler installation, and GB2/GC2-class pressure pipeline installation licenses, as well as equipment and machinery installation contracting qualifications. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and the Standing Committee of the Shandong Equipment Manufacturing Association. The company has also passed ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System certifications, and the ASME/U2 certification.
Reducing the emissions of nitrogen oxides (NOx) from biomass boilers can be achieved through the following measures:
Combustion Control Technology: Utilizes advanced combustion control techniques such as low nitrogen combustion technology. By optimizing the combustion process and regulating combustion temperature and oxygen concentration, the formation of nitrogen oxides is reduced. Methods such as staged combustion and optimized combustion chamber design can be employed to lower combustion temperatures and extend combustion times, further minimizing nitrogen oxide emissions.
SNCR Technology: Selective Non-Catalytic Reduction (SNCR) technology involves injecting reductants, such as urea solution, into the combustion process to react with nitrogen oxides, converting them into nitrogen and water. This technique reduces the formation and emissions of nitrogen oxides during combustion.
SCR Technology: Selective Catalytic Reduction (SCR) technology is a nitrogen oxide control technique. By injecting urea solution into flue gas and utilizing a catalyst, nitrogen oxides are converted into nitrogen and water. SCR technology achieves nitrogen oxide removal at lower temperatures, suitable for large biomass boilers.
Flue Gas Recirculation (FGR): This technology recycles a portion of flue gas back into the boiler combustion chamber, reducing combustion temperature and oxygen concentration, thereby minimizing the formation of nitrogen oxides. The emission of nitrogen oxides can be controlled by adjusting the recirculation ratio.
Fuel Selection and Pretreatment: Choosing low nitrogen fuels, such as low nitrogen biomass fuel, can reduce the formation of nitrogen oxides. Additionally, for biomass fuels with high nitrogen content, pretreatment measures such as drying and gasification can be taken to decrease the generation of nitrogen oxides during combustion.
Regular Maintenance and Cleaning: Regular maintenance and cleaning of biomass boilers ensure the cleanliness and proper operation of components such as burners and heat exchangers. Cleaning the combustion chamber and heat exchangers reduces soot buildup, enhances heat transfer efficiency, and decreases nitrogen oxide emissions.
By implementing the aforementioned measures comprehensively, emissions of nitrogen oxides from biomass boilers can be effectively reduced, achieving both environmental protection and energy-saving goals. Specific measures should be selected based on the characteristics of the boiler, its operating conditions, and emission requirements.

The brief steps for biomass boiler drying oven are as follows:
Prepare fuel: Select suitable biomass fuel such as wood chips and straw, and conduct pre-treatment like drying and sieving to ensure the quality of the fuel and its suitability for the furnace.
Ignition and ignition adjustment: Place the fuel into the combustion chamber of the biomass boiler, ignite, and adjust the ignition. Adjust parameters such as the oxygen supply, fuel supply, and combustion temperature in the combustion chamber to ensure stable combustion.
Heating and Temperature Control: As the fuel burns, biomass boilers produce high-temperature flue gas, which transfers its heat energy to the oven through a heat exchanger. During the heating process, it is necessary to control the temperature of the oven 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 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 shutdown and cleaning: Upon completion of the heating process or when the desired furnace effect is achieved, stop the fuel supply and heating, and perform the furnace shutdown procedure. Afterward, it is necessary to clean the furnace and biomass boiler, as well as the combustion chamber and flue.

Biomass boilers emit nitrogen oxides (NOx) during combustion, which are harmful to the environment. Therefore, controlling the NOx emissions from biomass boilers is a significant challenge. Here are some difficulties in NOx control for biomass boilers:
Fuel Characteristics: The composition and characteristics of biomass fuels are diverse, containing varying nitrogen content and volatile matter. This makes it difficult to accurately predict and control NOx emissions during the combustion process of biomass boilers.
Combustion Temperature: The generation of NOx is closely related to combustion temperature, with both excessively high and low temperatures increasing NOx formation. The combustion temperature of biomass boilers is influenced by various factors, such as fuel moisture and oxygen supply, making it challenging to control the combustion temperature for effective NOx emissions control.
Proper combustion air supply: Adequate combustion air supply aids in controlling NOx formation, but excessive or insufficient air supply can affect combustion efficiency and NOx emissions. For biomass boilers, the combustion air supply needs to be reasonably adjusted based on fuel characteristics and combustion conditions, which poses certain requirements for operators and control personnel.
Combustion System Design: The design of the combustion system in biomass boilers also has an impact on NOx emissions control. For instance, the adopted combustion technology and burner design, such as low NOx combustion technology and optimized combustion chamber structure, can effectively reduce NOx emissions.
Operation and Maintenance: Proper operation and regular maintenance of biomass boilers are crucial for controlling NOx emissions. Rational operation and scheduled maintenance can ensure the normal operation and combustion of the combustion system, thereby reducing the generation of NOx.
In summary, the challenges in controlling NOx emissions in biomass boilers mainly include fuel characteristics.

The methods for setting the pressure of biomass hot water boilers mainly include the following:
Regular Discharge: Regularly discharge excess water from the boiler to maintain normal operating pressure. Discharging the excess water helps prevent excessive internal pressure within the boiler, ensuring stable operation.
Timing: Operate at regular intervals based on the water level of the boiler to maintain normal working pressure. Pay attention to controlling the amount to prevent excessive operation that could lead to elevated boiler pressure.
Pressure Control System: The installed pressure control system continuously monitors the boiler's pressure via sensors and controllers, automatically adjusting according to set values. Should the boiler pressure exceed the set limit, the control system will automatically reduce fuel supply or expel excess moisture to maintain a stable working pressure for the boiler.
Pressure Regulator: Install a pressure regulator on the boiler's inlet water pipe. By adjusting the valve opening, control the water inflow to maintain the boiler's stable working pressure. The pressure regulator can automatically adjust to the set value, keeping the boiler pressure within the appropriate range.
Pressure Regulator: Install a pressure regulator in the boiler's combustion system to control the steam pressure of the boiler by adjusting the combustion intensity of the burner. The pressure regulator can automatically adjust the operating state of the burner according to the set value to maintain a stable working pressure of the boiler.
Above are common methods for setting the pressure of biomass hot water boilers. According to actual conditions and requirements, you can choose an appropriate pressure setting method to maintain the boiler's stable working pressure.
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