Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) holds an A-grade boiler manufacturing license, A2-grade pressure vessel manufacturing license, A2-grade pressure vessel design license, B-grade boiler installation license, GB2 and GC2 class pressure pipeline installation licenses, and mechanical and electrical equipment installation contracting qualifications. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and the council member of the Shandong Equipment Manufacturing Association. The company has also passed the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System certifications, and the American ASME/U2 certification.
The primary benefits of installing expansion tanks in a thermal oil furnace are as follows: - Alleviating thermal expansion and contraction: During operation, the thermal oil furnace experiences thermal expansion and contraction due to temperature changes. The expansion tank provides space for the thermal oil to expand, mitigating the impact of thermal expansion and contraction on equipment and pipelines, and avoiding stress concentration and equipment deformation caused by these effects. - Protecting equipment and pipelines: The expansion tank absorbs the expansion and contraction of the thermal oil, reducing shock and vibration on equipment and pipelines. This contributes to extending the service life of equipment and pipelines, and reducing the frequency of maintenance and replacements. - Reducing leakage risks: The expansion tank offers a sealed space, minimizing the risk of thermal oil leakage. When the thermal oil expands, excess oil can be accommodated through the expansion tank, preventing leaks and environmental pollution. - Facilitating maintenance and repairs: The presence of an expansion tank makes it easier to maintain and repair the thermal oil furnace system. When equipment or pipelines need to be repaired or replaced, the expansion tank can control the flow and stoppage of thermal oil, reducing downtime and the difficulty of maintenance. - In summary, the expansion tank plays a role in alleviating thermal expansion and contraction, protecting equipment and pipelines, reducing leakage risks, and facilitating maintenance and repairs in the thermal oil furnace system. It is an important design element that contributes to enhancing the safety and reliability of the thermal oil furnace system.

WNS Low-Nitrogen Condensing Hot Water Boilers offer the following advantages: - Low Nitrogen Emissions: Utilizing low-nitrogen combustion technology, these boilers significantly reduce NOx emissions by optimizing the combustion process and burner design. This aids in reducing environmental pollution. - High Thermal Efficiency: The condensing technology in WNS Low-Nitrogen Condensing Hot Water Boilers recovers heat from flue gases, enhancing energy utilization efficiency. Their thermal efficiency often exceeds 90%, surpassing traditional hot water boilers. This contributes to energy savings and reduced operating costs. - Safety and Reliability: Equipped with advanced control systems and safety devices, these boilers have excellent safety performance. They are fitted with multiple safety features, including overheat protection, overpressure protection, and water level protection, which automatically monitor and control the boiler's operation to ensure safe operation. - Flexibility: WNS Low-Nitrogen Condensing Hot Water Boilers are suitable for various applications, including industrial, commercial, and residential settings. They can accommodate different thermal load requirements, offering strong flexibility. Moreover, they can be integrated with other systems, such as solar hot water systems and ground-source heat pump systems, to further enhance energy efficiency. - Easy Operation and Maintenance: The operation and maintenance of WNS Low-Nitrogen Condensing Hot Water Boilers are straightforward and convenient.

The inspection of heat-conducting oil boiler tube plates is to ensure the safe operation of the boiler and prevent potential issues. The following are general steps for inspecting heat-conducting oil boiler tube plates: - Visual Inspection: Conduct a visual inspection to check for any obvious corrosion, cracks, deformation, or other anomalies on the tube plate surface. Pay special attention to inspecting for cracks or leaks at welds and joints. - Clean the Tube Plate: Clean the surface of the tube plate thoroughly to remove dirt and deposits, allowing for a proper inspection. - Ultrasonic Testing: Use an ultrasonic testing device to inspect the tube plate to detect any possible cracks or other defects. Ultrasonic testing helps determine the integrity and reliability of the tube plate. - Pressure Test: Conduct a pressure test to verify the sealing and pressure resistance of the tube plate. Gradually increase the pressure during the test, observe for any leakage, and ensure the tube plate can withstand the designed pressure. - Tube Plate Thickness Measurement: Use an ultrasonic thickness gauge to measure the thickness of the tube plate to determine if it meets the design requirements. Pay particular attention to the corrosion status, ensuring it remains within safe limits. - Weld Inspection: Inspect the welds on the tube plate to ensure the quality of the welds meets relevant standards and specifications. Check the integrity, quality of the weld, and whether the welding process meets requirements. - Documentation and Reporting: Document and report the inspection results of the tube plates, including any issues found, measures taken, and recommendations. These records and reports serve as references for future maintenance and management. It is important to note that the inspection of heat-conducting oil boiler tube plates should be carried out by qualified personnel and strictly in accordance with relevant standards and specifications. If any issues or anomalies are detected, appropriate repair and maintenance measures should be taken promptly to ensure the safe operation of the boiler.

Chemical cleaning of industrial boilers is a common method that effectively removes dirt and sediments inside the boiler, enhancing heat exchange efficiency and extending the boiler's lifespan. Below are the general steps and methods for industrial boiler chemical cleaning: Preparation: Turn off the boiler's power and gas supply, drain the water and steam inside the boiler, and ensure the boiler is in a safe condition. Prepare the required chemical cleaning agents and cleaning equipment. Cleaning Agent Selection: Choose suitable chemical cleaning agents based on the boiler's material and the nature of the dirt. Common cleaning agents include acidic cleaners, alkaline cleaners, and chelating agents. Cleaning Agent Circulation: Dissolve the cleaning agent in an appropriate amount of water and circulate it into the boiler through a pump. Determine the circulation time and temperature of the cleaning agent based on the boiler's size and the extent of dirt. Cleaning Agent Action: During circulation, the cleaning agent reacts chemically with the dirt inside the boiler, dissolving and decomposing it. Acidic cleaners can remove rust and scale, while alkaline cleaners can remove grease and organic matter. Rinsing and Neutralization: After the cleaning agent circulation is complete, rinse the boiler with clean water to flush out the cleaning agent and dissolved dirt. At the same time, use neutralizers to neutralize any remaining acidic or alkaline substances, ensuring the boiler's neutrality. Inspection and Maintenance: After cleaning, inspect the boiler to ensure the cleaning effect and normal operation. Perform corresponding maintenance and repair as needed. Points to Note When Conducting Industrial Boiler Chemical Cleaning: - Strictly follow the instructions and safety operation procedures for chemical cleaning agents to ensure the safety of the operators. - Choose appropriate cleaning agents and methods based on the boiler's material and the nature of the cleaning agents. - Control the concentration, temperature, and circulation time of the cleaning agent to avoid unnecessary damage to the boiler. - Monitor the concentration and pH value of the cleaning agent in a timely manner during the cleaning process and adjust the cleaning conditions. - After cleaning, flush the boiler to ensure that all cleaning agents and dirt are completely removed. - After cleaning, perform boiler maintenance and repair promptly to ensure normal operation and long-term use.
Our company attaches great importance to technological innovation and R&D design. We have one municipal-level enterprise technology center in Heze City, equipped with testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, etc. We have over 600 various instruments and 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 more. The key products and technologies we have developed, such as welding for temperature and pressure vessels, biomass boiler emission reduction, and waste heat utilization, have successively been selected for multiple Shandong Provincial Department of Industry and Information Technology science and technology innovation projects, Shandong Provincial key projects, and Heze City innovative and excellent projects. We have accumulated a total of 27 authorized utility models, 16 authorized inventions, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. The technical team of our company, in collaboration with Professor Li Yajiang of Shandong University, has developed deep cryogenic container processing technology using the international plasma arc + wire filling tungsten inert gas arc welding (PAW-GTAW) technology. After being appraised as a provincial-level scientific and technological achievement, our technology level has reached an international standard in the field of deep cryogenic container manufacturing.
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