In recent years, Jiangsu Kebao Machinery Manufacturing Co., Ltd. (formerly Yancheng Kebao Building Materials Environmental Protection Equipment Co., Ltd.) took technological innovation as a precursor, vigorously developed competitive products with independent intellectual property rights of enterprises, and quickly emerged in the market in a few years, becoming The highly influential high-tech enterprises in the national building materials industry already have 15 patented products and 5 provincial high-tech products. Following the KBH high-efficiency vertical dryer, recently cooperated with Southeast University, successfully developed the KBDH dynamic vertical dryer, and achieved a major breakthrough in drying manufacturing technology. The reporter recently interviewed Tong Jinqiu, Executive Vice President of Jiangsu Building Material Machinery Association and General Manager of Jiangsu Kebao Machinery Manufacturing Co., Ltd.
Reporter: The KBH high-efficiency vertical dryer from Cobb was well received by users after it was put on the market. We have learned that your company has cooperated with Southeast University and has now developed the KBDH Dynamic Vertical Dryer. It solves the problems of large heat loss and high coal consumption that are commonly found in the drying of domestic materials. Please tell us about this situation.
Tong Zong: At present, there are mainly the following problems in the drying of domestic materials: First, there are widespread problems such as large heat loss, low thermal efficiency, high coal consumption, difficulty in controlling the discharge of water, and low relative yield; secondly, the temperature is less than 350°C. The waste heat flue gas as a heat source can not be used for drying materials. Third, it cannot adapt to the drying of crystal water-containing materials (such as dihydrate gypsum into hemihydrate gypsum drying), and can not adapt to the drying of high-moisture materials; Fourth, the drying The phenomena that the particle size of the material becomes larger in the dry process cannot be solved, which greatly affects the drying effect of the material. Fifth, the drying system does not use an automatic computer detection and control system, and it is not possible to timely accurately feed material, wind, coal, etc. Detection and control, resulting in the drying system can not play the best effect. The latest generation of KBDH dynamic vertical dryer equipment developed by our company is our cooperation project with Southeast University. It has been improved on the company's patented KBH efficient vertical dryer. It is aimed at the current domestic and international drying equipment and process flow. Inadequacies, the use of new technology, new equipment and computer software technology, the establishment of the digital design parameters of the drying system model, energy saving and more obvious, coal consumption is only 8kg standard coal / t dry material, power consumption is only 2 ~ 2.5kWh /t Dry material is a new generation of vertical dryers that are newer, stronger, and more energy-efficient.
Reporter: What are the key technical problems that KBDH Dynamic Vertical Dryer focuses on?
Tong Tong: The key technology of the new-generation dynamic vertical dryer is to make the material as much as possible dispersed in the dryer to increase the contact area between the hot flue gas and the material, and to control the flow rate and residence time of the material in the dryer Convection, radiation and conduction heat exchange between the hot flue gas and the material. We will also use the computer software technology to optimize the material drying parameters to perform on-line testing of the moisture and gas temperatures in the three zones of the pre-tropical zone, drying zone, and drying zone, and the system's heating capacity, induced air volume, and secondary The system parameters such as hot air distribution, heat supply capacity, material cut-off flow, and residence time are adjusted online to achieve dynamic optimization and balance of the system and improve the utilization of thermal energy in the system.
Reporter: As far as I know, this set of drying equipment includes high-efficiency vertical dryers, airbag pulse bag dust collectors, high-temperature boiling furnaces, etc., and the main equipment is a vertical dryer. This equipment is efficiently built by KBH. The dryer has been further innovative and many users want to know where the innovation in the KBDH dynamic vertical dryer is?
Tong Tong: The main innovations are mainly in the following aspects: First, the principle and method of drying with high-efficiency vertical dryers are used. At the same time, the material balance and heat balance principles are adopted, and the external simplified thermal insulation is retained, and the internal heat exchange device is designed. Installed into a high-yield and high-efficiency heat exchange device that can adapt to different materials, it uses the dynamic vertical dryer's anti-blocking vibration distribution device, vibration flow adjustment device, rotary material crushing device, internal and external annular air inlet devices, and so on. Blockage problem; second, secondary hot air technology and structure; third, variable diameter structure, dry process production line of cement industry rotary kiln produces a large amount of waste heat fumes below 350°C. The use of these waste heat exhaust gas reduces energy consumption and production costs. Has a crucial role. In the past, due to the defects of the rotary dryer itself, this portion of residual heat could not be effectively utilized, and the dynamic high-efficiency vertical dryer made the diameter of the pre-tropical and drying belt expanded, the wind speed decreased, and the evaporation space became larger through the variable diameter structure. At the same time, by controlling the residence time of the material through different forms of cones and cones, the maximum efficiency of the utilization of waste heat is exerted; the fourth is the moisture and gas temperature of the material in the three zones of the pre-tropical zone, the drying zone and the drying zone. Online inspection, automatic balance of control system materials, wind, coal, and on-line adjustment of the system's heating capacity, induced air volume, secondary hot air distribution and heating capacity, material cut-off and residence time and other system parameters to achieve The system's process parameters are dynamically optimized to improve the utilization of the system's thermal energy. Through the above innovation, the new drying equipment will be more able to meet the actual needs of the majority of companies.
Reporter: The KBH high-efficiency vertical dryer from Cobb was well received by users after it was put on the market. We have learned that your company has cooperated with Southeast University and has now developed the KBDH Dynamic Vertical Dryer. It solves the problems of large heat loss and high coal consumption that are commonly found in the drying of domestic materials. Please tell us about this situation.
Tong Zong: At present, there are mainly the following problems in the drying of domestic materials: First, there are widespread problems such as large heat loss, low thermal efficiency, high coal consumption, difficulty in controlling the discharge of water, and low relative yield; secondly, the temperature is less than 350°C. The waste heat flue gas as a heat source can not be used for drying materials. Third, it cannot adapt to the drying of crystal water-containing materials (such as dihydrate gypsum into hemihydrate gypsum drying), and can not adapt to the drying of high-moisture materials; Fourth, the drying The phenomena that the particle size of the material becomes larger in the dry process cannot be solved, which greatly affects the drying effect of the material. Fifth, the drying system does not use an automatic computer detection and control system, and it is not possible to timely accurately feed material, wind, coal, etc. Detection and control, resulting in the drying system can not play the best effect. The latest generation of KBDH dynamic vertical dryer equipment developed by our company is our cooperation project with Southeast University. It has been improved on the company's patented KBH efficient vertical dryer. It is aimed at the current domestic and international drying equipment and process flow. Inadequacies, the use of new technology, new equipment and computer software technology, the establishment of the digital design parameters of the drying system model, energy saving and more obvious, coal consumption is only 8kg standard coal / t dry material, power consumption is only 2 ~ 2.5kWh /t Dry material is a new generation of vertical dryers that are newer, stronger, and more energy-efficient.
Reporter: What are the key technical problems that KBDH Dynamic Vertical Dryer focuses on?
Tong Tong: The key technology of the new-generation dynamic vertical dryer is to make the material as much as possible dispersed in the dryer to increase the contact area between the hot flue gas and the material, and to control the flow rate and residence time of the material in the dryer Convection, radiation and conduction heat exchange between the hot flue gas and the material. We will also use the computer software technology to optimize the material drying parameters to perform on-line testing of the moisture and gas temperatures in the three zones of the pre-tropical zone, drying zone, and drying zone, and the system's heating capacity, induced air volume, and secondary The system parameters such as hot air distribution, heat supply capacity, material cut-off flow, and residence time are adjusted online to achieve dynamic optimization and balance of the system and improve the utilization of thermal energy in the system.
Reporter: As far as I know, this set of drying equipment includes high-efficiency vertical dryers, airbag pulse bag dust collectors, high-temperature boiling furnaces, etc., and the main equipment is a vertical dryer. This equipment is efficiently built by KBH. The dryer has been further innovative and many users want to know where the innovation in the KBDH dynamic vertical dryer is?
Tong Tong: The main innovations are mainly in the following aspects: First, the principle and method of drying with high-efficiency vertical dryers are used. At the same time, the material balance and heat balance principles are adopted, and the external simplified thermal insulation is retained, and the internal heat exchange device is designed. Installed into a high-yield and high-efficiency heat exchange device that can adapt to different materials, it uses the dynamic vertical dryer's anti-blocking vibration distribution device, vibration flow adjustment device, rotary material crushing device, internal and external annular air inlet devices, and so on. Blockage problem; second, secondary hot air technology and structure; third, variable diameter structure, dry process production line of cement industry rotary kiln produces a large amount of waste heat fumes below 350°C. The use of these waste heat exhaust gas reduces energy consumption and production costs. Has a crucial role. In the past, due to the defects of the rotary dryer itself, this portion of residual heat could not be effectively utilized, and the dynamic high-efficiency vertical dryer made the diameter of the pre-tropical and drying belt expanded, the wind speed decreased, and the evaporation space became larger through the variable diameter structure. At the same time, by controlling the residence time of the material through different forms of cones and cones, the maximum efficiency of the utilization of waste heat is exerted; the fourth is the moisture and gas temperature of the material in the three zones of the pre-tropical zone, the drying zone and the drying zone. Online inspection, automatic balance of control system materials, wind, coal, and on-line adjustment of the system's heating capacity, induced air volume, secondary hot air distribution and heating capacity, material cut-off and residence time and other system parameters to achieve The system's process parameters are dynamically optimized to improve the utilization of the system's thermal energy. Through the above innovation, the new drying equipment will be more able to meet the actual needs of the majority of companies.
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