Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan Road, Economic 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-freeze 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 of 200,000 square meters, with the main workshop spanning 83,000 square meters. It currently employs 710 people, including 247 engineers and technicians and 82 intermediate-level technicians. In December 2016, it was recognized as a "High-tech Enterprise" by the Science and Technology Department. In June 2021, it was named a "Specialized and New Enterprise in Shandong Province" by the Industry and Information Technology Department. In June 2022, it was identified as a "Gazelle Enterprise in Shandong Province" and in August 2022, it was recognized as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
When operating gas boilers, there are three important precautions to be aware of: 1. Safe Operation: Gas boilers are thermal energy equipment and safety must be a priority. Firstly, ensure that the operator has the relevant skills and knowledge, understands the boiler's working principle and operation procedures. Secondly, strictly prohibit the storage of flammable materials around the boiler and maintain good ventilation. Additionally, regularly inspect and maintain the safety valve, pressure gauge, and other safety devices to ensure they function properly. 2. Proper Gas Supply Adjustment: The combustion of gas boilers requires an appropriate supply of gas. During operation, adjust the gas supply according to actual needs to ensure stable combustion. At the same time, regularly check the sealing of the gas pipeline and valves to prevent gas leaks. 3. Regular Maintenance and Cleaning: Regular maintenance and cleaning of gas boilers are crucial for their proper operation and extended lifespan. Regularly inspect all parts of the boiler, clean the burner, flue, and heat exchanger of accumulated dust and dirt to ensure heat transfer efficiency and combustion effectiveness. Moreover, regularly replace filters and clean water treatment equipment to ensure clean water quality and prevent scale and corrosion. It should be noted that the above three precautions are just basic operational points, and specific operational and maintenance requirements may vary depending on the model and specifications of the gas boiler. Therefore, it is advisable to refer to the boiler's operation manual or consult with experts before operating a gas boiler to ensure correct and safe operation.

Safety requirements for steam boiler valves mainly include the following aspects: Valve Selection: Choose the appropriate type and specification of valves for steam boilers. The valves must comply with relevant standards and regulations, and possess characteristics such as high-temperature resistance, pressure resistance, and corrosion resistance. Valve Installation: The valves should be installed correctly at the corresponding positions on the steam boiler. During installation, ensure that the connections are secure and the seals are reliable to prevent leaks and loosening. Valve Operation: The operation of the valves should be easy, flexible, and capable of accurately controlling steam flow and pressure. The handle or device should indicate the opening and closing directions of the valve, as well as the corresponding operation methods. Valve Sealing: The sealing performance of the valves is crucial. The valves should have good sealing properties to prevent steam leakage and energy loss. The sealing surfaces should be flat, smooth, and able to withstand high temperatures and wear. Valve Maintenance: Regularly inspect and maintain the valves to ensure their normal operation and safety performance. This includes cleaning the valves, checking the sealing surfaces, lubricating moving parts, and promptly repairing or replacing damaged components. Safety Valve: A safety valve must be installed on the steam boiler to protect the safe operation of the boiler. The safety valve must comply with relevant standards and regulations and should automatically open to release overpressure steam when the pressure exceeds the set value, preventing boiler explosions. Valve Identification: The valves should be marked with their type, specification, working pressure, and flow rate information. This helps operators correctly identify and operate the valves, avoiding incorrect operations and accidents. It should be noted that the above safety requirements are general guidelines, and specific safety requirements must be determined based on the type, scale, and operating environment of the steam boiler. When using valves, follow relevant laws, regulations, and safety operation procedures to ensure the safe operation and effective control of the valves.

The flow rate standard for the heat-conducting oil in the oil tubes of a thermal oil furnace typically varies according to specific application and equipment requirements, with no fixed, universal value. Generally speaking, the flow rate of the heat-conducting oil within the tubes should be maintained within a reasonable range to ensure the normal operation of the equipment and the effectiveness of heat transfer. Excessive flow rates of the heat-conducting oil can lead to issues such as increased system pressure loss and pump power consumption, higher friction losses in the pipes leading to energy loss, and increased system noise and vibration. On the other hand, low flow rates can result in insufficient heat transfer, affecting the equipment's thermal efficiency, prolonged residence time of the heat-conducting oil in the pipes, which may lead to oxidation and thermal decomposition, shortening the oil's lifespan, and the formation of carbon deposits in the pipes, increasing resistance and affecting fluid flow. Therefore, when designing and operating a thermal oil furnace system, it is necessary to consider specific equipment parameters, the properties of the heat-conducting oil, and pipeline layout, among other factors, to determine an appropriate flow rate. Typically, the flow rate should be within the range of 0.5-2.0 m/s, but the exact figure needs to be adjusted and optimized based on actual conditions. In practice, the flow rate can be controlled by monitoring and adjusting the pump flow and pipeline resistance to meet the equipment's thermal energy needs and operational requirements.

The inspection contents and requirements for gas-fired boilers typically include the following aspects: - Safety valve and pressure gauge: Check the installation and securing of the safety valve and pressure gauge to ensure proper operation and accurate pressure display. - Combustion system: Inspect the functioning of the burner, including ignition, combustion, and combustion stability. Check the connections of the gas supply pipes and valves to ensure no leaks. - Flue and heat exchanger: Examine the cleanliness of the flue and heat exchanger, for dust and debris, to ensure heat exchange efficiency and smoke emissions meet requirements. - Water level control system: Check the operation of the water level controller and gauge to ensure accurate and reliable water level control, preventing overfill or low water levels. - Gas supply system: Inspect the installation and connections of the gas supply pipes and valves to ensure normal gas supply and no leaks. - Electrical system: Check the wiring and connections of the electrical system, including power supply, controllers, and sensors, to ensure normal operation of electrical equipment and avoid electrical faults. - Safety devices: Verify the functioning of safety devices, including safety valves, pressure switches, and temperature controllers, to ensure proper operation and safeguard the safe operation of the boiler. - Records and documents: Review the boiler's operating records, maintenance records, and inspection reports, ensuring complete and accurate documentation of operation and maintenance. The inspection of gas-fired boilers should be conducted by institutions or individuals with the appropriate qualifications, following relevant laws, regulations, and standards. The frequency and specific requirements for inspections can be determined based on the boiler's usage and local regulations. Timely inspections and maintenance ensure safe and efficient operation of the gas-fired boiler.
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 types 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 more. The key products and technologies we have developed, such as welding for temperature and pressure vessels, emissions reduction from biomass boilers, and waste heat utilization, have successively been shortlisted for multiple Shandong Provincial Department of Industry and Information Technology science and technology innovation projects, key projects in Shandong Province, and Heze City innovation and excellence 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 Yajiang Li from Shandong University, has developed deep cryogenic container processing technology using the international plasma arc + filler wire tungsten inert gas arc welding (PAW-GTAW) technology. This technology has been appraised as reaching international standards in the field of deep cryogenic container manufacturing at the provincial level.
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