1 Overview of the operating system of the magnetic flap level gaugeThis article mainly focuses on the interpretation of the operating principles and usage methods of the Lingong brand BHY4.6m×124.5m/124.5m new parallel energy-saving and environmentally friendly magnetic flap level gauge, and focuses on the tenth-generation section six product technology, and tries to be reasonable. Evidenced analysis. In line with the inheritance of the operating principle of the magnetic flap level gauge, briefly describe some common usage methods, hoping to promote the openness and transparency of the brick and tile kiln industry, and help improve the operation and use of the magnetic flap level gauge by industry colleagues And technical research.Three years ago, Lingong kilns were also afraid of leaking technology and held a conservative attitude in technical exchanges. Only after thoroughly studying the teachings of management philosophy did they dare to disclose some conventional technical information. The facts have proved that this has promoted the development of the company’s technology even more.2 The structural characteristics of the magnetic flap level gaugeFigure 1 shows the layout process of the kiln, which is composed of crushing system, aging system, forming system, static car turnover system, drying chamber, roasting kiln, and carriage return line unloading system. This article focuses on the operating principles of its drying chamber and roasting kiln. Other auxiliary systems are still an important part of the operation of the magnetic flap level gauge, but they are not the focus of this article.The BHY new parallel energy-saving and environmentally friendly magnetic flap level gauge is composed of a parallel layout structure of a drying chamber and a roasting kiln. The conventional side is equipped with a raw material pretreatment system, a forming marshalling system, and a static car turnover system, and the other side is equipped with a carriage return line for unloading. system. The drying chamber mainly adopts ZL201721336352X patented technology, top-mounted and side-mounted staggered air supply, centralized ceiling drainage and gradient drying process design; roasting kiln mainly adopts ZL201620593816.4 patented technology, single-wall composite wall and ceramic fiber module suspended flat roof structure, The whole is constructed with brick-concrete masonry materials, and the air duct is mainly built-in masonry.3 The basic functions of the magnetic flap level gaugeBHY’s new parallel energy-saving and environmentally friendly magnetic flap level gauge adopts the tenth generation of section 6 technology. Compared with the sixth generation of BHY parallel energy-saving and environmentally friendly magnetic flap level meter, the sixth generation section 5 technology, it has obvious high-yield effect and overall output. Increased by 5% to 40%. As shown in Figure 1, BHY4.6m×124.5m/124.5m new parallel energy-saving and environmentally friendly magnetic flap level gauge, internal combustion heating value is configured to 300kCal, when the outside temperature is above 15℃, the production of KP1 brick can reach an average of 30min/car , The production of solid bricks can reach an average of 42min/car. At present, Lingong has achieved heat balance and effective use of working fluids through this kiln technology, achieving extremely high output and energy-saving effects, and meeting current market demands. From the entrance door of the drying chamber to the 1st air outlet, there is a low-temperature drying belt, and the general drying temperature is 75-90°C. The air distribution dilution zone from 1# air outlet to 2# air outlet is the air distribution dilution zone, which controls the drying temperature of the low-temperature drying section according to the sensitivity coefficient requirements of the low-temperature drying zone bricks.There is a high-temperature drying belt from the 2# air outlet to the outlet end of the drying chamber, and the general drying temperature is 160～280℃. Thus, a gradient drying process is formed according to the different sensitivity coefficients of the bricks. The target dehydration of the low temperature drying zone is 11%. In this stage, the sensitivity coefficient of the first half of the bricks is relatively high, and the bricks are prone to wind cracking; the sensitivity coefficient of the second half of the bricks in this stage is reduced, and the bricks are dewatered too fast and easy to fall. pile. The target of the high temperature drying zone is dehydrated to ≤4%. The sensitivity coefficient of the bricks at this stage is low. The drying temperature and air volume generally will not cause cracking and stacking. The drying temperature and air volume determine the drying effect of the bricks. The dryness of the bricks is a prerequisite for determining the speed of firing and fire escape, that is, the principle of dry wood and fire is used to achieve rapid temperature rise and fire escape. For the operator of the central control of the magnetic flap level gauge, the quality of technology is to accurately grasp the sensitivity coefficient of the brick, and to flexibly use the drying temperature and air volume according to the change of the sensitivity coefficient.The energy-saving design principle is to increase the heat storage rate and reduce the heat absorption value of the kiln body, effectively use the heat source efficiency and the balanced conduction of the working fluid, and realize the heating value consumption according to the relevant roasting system, drying system and thermal equipment application principles; 300kCal Very low effect. The internal combustion brick is the carrier of the heat source, and the increase in the height or the widening of the cross section is the use of Zhongchai’s firing principle of high flame. Realize the ideal thermal balance state through the kiln structure, promote uniform pressure and temperature of the isothermal surface system of the kiln room, effectively improve the sintering quality of the kiln, and achieve consistent burnt product color. The gradient drying process is adopted to meet the sensitivity coefficients of different drying cycles of the bricks, and the bricks can be thoroughly dried to promote dry fire and speed up the fire speed of the high-layer internal combustion magnetic flap level gauge. Turning from rapid fire to low temperature long burning, burning the bricks through is also a reduction in consumption.The key to the flue gas emission standard of the magnetic flap level gauge is the oxygen reference value, that is, to grasp the excess air coefficient. Lingong mainly adopts the so-called three pinch oxygen source measures to control it. The drying heat source comes from the elemental gas smoke heat of the roasting kiln. The elemental gas smoke heat is transferred to the wet billet. The elemental gas smoke heat and the billet water vapor produce a chemical reaction, which promotes the change of various thermal parameter values and thermal differential relations of the working fluid. The internal energy, enthalpy and entropy of the gas undergo transformation to form so-called black smoke, blue smoke, white smoke and colorless smoke. A huge flue gas reaction chamber is set up at the upper end of the drying chamber. The elemental moisture exhaust gas at different temperatures is mixed and cooled for 7-12 seconds to cause the components of the mixed gas to react physically, thereby changing the carbon dioxide and water vapor in the flue gas. , Nitrogen, Carbon Monoxide, Oxygen and other gas characteristics, using basic state parameters to change the physical and chemical composition of the exhaust flue gas, theoretically and experimentally, it has reached the ideal flue gas particulate emission standard.4 Operation principle and use of magnetic flap level gaugeThe initial ignition and drying steps of the BHY new parallel energy-saving and environmentally-friendly magnetic flap level gauge:①When the kiln is switched on for the first time in winter, prepare 5 carts of high calorific value fired bricks of 550～600kCal, and the rest will be based on the heating value ratio of 350kCal; if the kiln is not for the first time in winter, generally 5 carts of high calorific value fired bricks of 500～550kCal will be prepared, and the rest are based on 300～ The calorific value ratio of 320kCal can be gradually reduced to 220～300kCal according to the kiln running-in period, operating proficiency and the increase of outside air temperature.② Support the stove at the last row of coal injection holes, and pay attention to control the temperature of the space in front of the stove at about 400°C.③Using 40～60℃ hot air to dry the kiln in the drying chamber has no effect, only the bricks can be dried. It is recommended that the drying chamber be filled up at one time and air is slowly dried until the residual moisture reaches <9%. The drying temperature of forty to fifty degrees that arises on the stovetop will not crack or bake the bricks. The heating centrifugal fan is turned on at 26～28Hz, the tidal exhaust axial fan is turned on at 42～46Hz, the exit door of the drying chamber is closed, and the other end of the entrance door is fully opened. In the winter point kiln, the air-supply centrifugal fan is turned on by 26-28Hz, the tidal-discharging axial fan is turned on by 30-34Hz, and the end door of the drying chamber is closed.④Wet billet (residual moisture content ≤9%) at one time until the kiln car is pushed to the end of the air duct of the roasting kiln (about 10 vehicles), when it reaches the crystallization moisture content of ≤6%, one vehicle is carried out every 2 to 3 hours. The current 5 cars burn at 700°C, and the stove can be removed to gradually increase the speed of entering the car. Here is a reminder that the kilns built in winter are absolutely cracked and have nothing to do with the drying kilns.⑤After receiving the fire, the drying temperature will increase rapidly, and the drying temperature control gate should be adjusted in time. The air gate of the roasting kiln gradually retreats from the near gate to the far gate with the speed of the fire. According to the extension of the fire zone, the frequency conversion of the fan is gradually increased. The frequency conversion of the conventional heating centrifugal fan is 40-46Hz, and the frequency conversion of the tidal-discharging axial fan is 42-48Hz. The air outlet is adjusted according to the demand of air volume and air pressure.⑥The coal used in dry billet kilns shall not exceed 6t, and the coal used in wet billet kilns shall not exceed 25t. Otherwise, it is regarded as waste. Note for the operator of the central control of the BHY new parallel energy-saving and environmentally friendly magnetic flap level gauge:①Before using the kiln, be sure to carefully read the "Magnetic flap level gauge operation process drawing" and "BHY new parallel energy-saving and environmentally friendly magnetic flap level gauge operating instructions".②From the perspective of the traditional magnetic flap level gauge, the environmental protection magnetic flap level gauge changes, it is the so-called three pinch, that is, pinch off the oxygen source. Generally, the oxygen content in the air is 21%, which is called the original oxygen source. Oxygen can support combustion but cannot burn itself. The first is to pinch off the oxygen source for the residual heat drying. The air at this stage is not burned, and the residual heat drying hot air belongs to the original oxygen source. The second is to set a shut-off door at the entrance of the roasting kiln to prevent unorganized infusion of natural air when entering the car. As the smoke and heat system is transported from the adjacent Harbin tuyere to the drying room, this air is almost unburned. Oxygen source. The third is to change from negative pressure drying to slightly negative pressure drying or slightly positive pressure drying (close to 0 pressure point), that is, to pinch off the original oxygen source formed by air leakage and air distribution in the drying chamber. The drying chamber can be dried under both positive pressure and negative pressure, and it can still operate when the centrifugal fan or the axial flow fan is turned off.To grasp the reasons for the formation of the excess air coefficient, start tackling key problems from the principle, overcome barbaric operations and change operational habits, and control the oxygen content is not a problem. It is normal to control the oxygen content to more or less affect the output of the kiln. From the average drying temperature above 165℃ to the exhaust temperature below 45℃, using the dust removal principle of wet electrostatic dust removal and tube bundle dust removal, combined with the chemical transformation theory of flue gas composition, the brick and stacking method is a large filter screen. Water vapor is a spray cooler, and the reaction chamber is a tube bundle device. When the oxygen content is controlled at 18%, from the cooling range, the flue gas composition changes, that is, the relative changes in the particulate matter, and the particulate matter will naturally be reduced. Reasonable and clever combination use, this is innovative technology. The theory and measures of returning moisture to the roasting kiln to reduce the oxygen content can only be a passive measure to make up for it, and it does not conform to the logic of scientific design.③The sintering of the internal combustion type magnetic flap level gauge is based on the speed of the previous fire, that is, the front fire arrives, and the vehicle still enters when the temperature in the high temperature zone does not reach the set temperature. Otherwise, the internal combustion lamp will go out, indicating that the heating value of the current high temperature zone is small. The front fire has not arrived, and the vehicle will not enter the vehicle when the temperature in the high-temperature zone reaches the set temperature. Otherwise, the roasting system will be destroyed, indicating that the heating value of the current high-temperature zone is large.④Daily operation and maintenance steps: 1. The operator mainly adjusts the air outlet to maintain the heat balance and pressure balance of the kiln; 2. When the heating value changes from 20 to 30 kCal, adjust the fan frequency conversion; 3. The heating value presents to 30 to 50 kCal or When the outside climate changes, adjust the Harbin air sluice and temperature control sluice.⑤The theory and data cannot be flexibly adapted, and the necessary corrections and grasps must be given based on the experience of the fire workers. 10 minutes before the scheduled entry, the central control operator will conduct a patrol to check whether the high-temperature area and the high-level tidal discharge area are offset.⑥Install the thermocouple according to the position shown in the figure, and accurately grasp the temperature control point.⑦The temperature shown refers to the temperature of the hot air measured by a thermocouple, and the temperature measured by an infrared thermometer is the temperature of the sintered product body. The two temperatures should not be confused.Technical tracking and after-sales service matters:① Implement life-long technical tracking services for the contracted projects, and provide technical training and guidance for all employees. A 12-day ignition commissioning and technical training; paid escort personnel to teach the central control operation technology hand by hand; project acceptance 3 to 5 days after the run-in period, subject to the kiln performance and quality commitment. Provide the manual of the magnetic flap level gauge and post operation procedures to completely solve all the worries of investors.②The kiln adjuster must not only adjust the kiln well, but also record the debugging process and the measures taken in written form to prevent rash comments and personal assumptions, just like a medical record written by a doctor, which is a professional responsibility.③Not only teaches the operation method of the magnetic flap level gauge, but also explains the operation principle of the magnetic flap level gauge thoroughly. Only by correctly understanding its operation principle can we really avoid all blind use.④ If you still fail to master the operating skills in a short period of time, you can send someone to accompany the fever for a fee, that is, 10,000 to 15,000 yuan per month, and hands-on teaching for 1 to 3 months. The operator of the central control must master the operating principle of the magnetic flap level gauge, and actively collect first-hand relevant information, grasp the essence of the magnetic flap level gauge and the sintering system, and be good at summing up experience, so they can naturally make perfect.
5 Application status and misunderstandings of magnetic flap level gaugeAt present, there is a common phenomenon of brutal operation in the brick and tile kiln industry, matching the ultra-high heating value and a large amount of wind, the bricks are only half-baked, and the output is one-sided pursuit. The urgent need to improve the skill level of the central control operator and the common sense of the furnace, the promotion of precise operation has become a bottleneck in the development of the magnetic flap level gauge.It is only a matter of time to comprehend the operating principle of the magnetic permeable flap level gauge. But the master led the door, and the practice was personal. The kiln master who has reached the ultimate level is a personal effort, and has little to do with the teacher’s professor. China’s magnetic flap level gauges have a variety of structures, and each kiln is the same. It is necessary to understand the operating principles of the current magnetic flap level gauges.
Post time: 21-09-21