[China Glass Net] The application of float glass is extensive, involving many industrial fields such as architectural decoration, photoelectric curtain wall and home appliance furniture. The analysis of its production shows that it is extremely important to add related materials to the furnace. The feeder equipment and the feeding method directly affect the melting speed of the glass as well as the melting ability and the melting quality. Based on this, on the basis of understanding the production process of the float glass process, the accuracy and scientificity of the application of the feeder are strengthened, which has become the key to improving the quality of float glass production.
1. Overview of float glass production line
Taking the standard float glass production line as an example, the production process is described. Firstly, the batch materials mixed according to a certain ratio are sent into the feeder placed at the mouth of the feeder, and the push plate is used according to the speed required by the process. The input batch is pushed into the melting furnace, and under the action of high temperature, the batch material is melted into a liquid state. At this time, the horizontal mixer is used to stir to form a glass solution; secondly, the flow gate is used to liquefy the state. The glass solution is controlled to flow into the tin bath while leveling off the surface of the tin bath in a natural state. Under the cooperation of the edger and the edge splicer, the glass solution attached to the surface of the tin liquid is formed into a softened glass ribbon with a wide width and a thick thickness, and is transferred to the conventional system of the float glass annealing kiln through the transition roll table for annealing; Under the action of the conveying system, the annealed glass strip is cut to the cold end conveying and slitting machine, and then enters the main line falling board system. The system will return the glass piece that does not meet the process standard according to the relevant testing information. The plate crushing system transfers the glass residue to the glass compartment after the crushing process. The qualified glass piece is further transferred to the downstream blowing cleaning machine part via the roller table to complete the cleaning process of the glass surface, and finally the float glass finished product is obtained.
2, the classification and characteristics of the feeder
Based on the feeding method, the feeding machine can be divided into a ridge type feeding machine and a blanket type feeding machine. When the traditional ridge type feeding machine is used for feeding, the covering area is small and not only easy to wear, but the material pile is more dispersed, and the flying material is in a situation. serious.
In contrast, in recent years, blanket feeders, which are widely used in various industrial fields, can effectively solve the problems associated with conventional ridge feeders. Each kiln is provided with two blanket feeders connected in parallel for feeding. The principle is that in a group of tugs, the feeding mechanism is used to drive the feeding shovel to reciprocate, and the bottom surface of the feeding shovel forms a certain angle with the horizontal plane. When it pushes the batch material in the feed tank, there is a tendency to press into the glass liquid, and under the action of gravity, the batch material in the silo flows downward and can be effectively controlled by the regulating shutter, and the feeding shovel The reciprocating distance and speed in the feeding table can be adjusted according to actual production needs. According to the analysis of the blanket feeder, it can be divided into the arc blanket type feeder and the inclined blanket type feeder. Among them, the inclined blanket type feeder has a wide application range and good application effect. The inclined blanket feeder feeding table is linear, and the inclination angle formed between the horizontal plane and the horizontal plane changes due to the difference of the movement trajectory. When the movement trajectory changes, the thickness in the upper layer of the feeding table also changes. Under the action of the feeding shovel at the front end of the feeder, the batch material is pushed into the kiln to complete the feeding of the feeder.
3. Application of inclined blanket type feeder in float glass production line
The analysis of the float glass furnace shows that it has a large melting amount, and its furnace structure is mostly dominated by a cross-fired kiln. The feeding tank is located at the front end of the melting tank, and its size is the size of the melting tank and the feeder. The quantity is determined together with the method of feeding. Most of the traditional flat glass production is based on a ridge type feeder, so that the size of the feed tank is set, and the width of the feed tank is also largely determined according to the number of ridge type feeders applied. With the advent of float glass production process, at present, the inclined blanket type feeder has become a widely used feeder in the production process of float glass. Therefore, this chapter focuses on the application of the inclined blanket type feeder in the float glass production line. Explore.
3.1, feeding method
The analysis of the front wall of the transverse flame glass melting furnace shows that the fish belly structure is applied at one time, so it is greatly affected by high temperature and alkali steam environment and flying material, and the service life is relatively short. There are two types of feed tanks at the feed port of the furnace, which are single feed tanks and double feed tanks. For a single feed tank, the width is about 75% of the width of the melt pool, while the double feed tank is 60% to 70% of the width of the melt pool, in order to ensure the safety and reliability of the front wall structure of the furnace. Sex.
In recent years, as the tonnage of the melting furnace continues to increase, the width of the feeding tank has gradually increased. Some manufacturers have converted the wider feeding tank into a double feeding tank, but there is still a problem of corrosion in the traditional feeding tank, and it is difficult to mix the material in the melting zone. Full coverage. After the emergence of the inclined blanket feeder, the traditional single feeding tank and the narrow feeding tank began to change to the feeding tank of the full kiln width, but the actual transformation process of the feeding tank during the float glass production process was relatively slow, and there were many successive occurrences. The arrangement of the feeding machine feeding tank. For example, the two feeders are symmetrically arranged with a gap of about 550 mm in the middle, and a collecting water bag is placed in this space, so that the occurrence of the eight-character material during the advancement of the batch material can be alleviated, but due to the space gap Smaller and the water pack capacity is not large, so the effect is not obvious. In recent years, a feeding idea based on the linkage operation of two feeders has been proposed, that is, through the linkage operation of two feeders, the batching materials are evenly arranged in the width direction, thereby ensuring the stability and regularity of the bubble boundary line. In solving the problem of pool wall erosion, it can be solved by strengthening cooling and related methods such as brick and water-filling, and at the same time, by fully utilizing the flame coverage area, it not only saves energy, but also promotes the material melting rate to be greatly improved.
3.2. Operation and adjustment of inclined blanket feeder
After the batch material is poured into the glass melting furnace, its shape and thickness and the melting speed should be relatively stable under certain conditions, but the melting of the different shapes and thickness and melting rate of the batch in the melting furnace is not the same. Therefore, it is necessary to make scientific adjustments to ensure the overall quality and energy consumption level of glass melting. If the thickness of the layer is too thin, the reaction process between the feeding process and the batching material in the feeding tank is unstable, and the too thick layer will cause the melting difficulty to be too large and the energy consumption is serious. Therefore, it is necessary to scientifically determine the thickness of the layer to ensure the glass. The various indicators in the melting process are relatively stable. The inclined blanket type feeder is used to adjust the batch material into a horizontal monopoly, thereby increasing the surface area of ​​the heat radiation and speeding up the melting rate of the batch material. However, the analysis of the inclined blanket feeder can show that although the feeding shovel will have a downward driving force to the compound, the force is relatively small, and it is difficult to form a transverse ridge layer, but it can be adjusted reasonably. The fracture of the layer is promoted. The specific method is: according to the actual mixing material of the float glass, the thickness of the feeding material is appropriately increased, the height of the rear wheel is increased, the inclination angle of the crucible is increased, and the ratio between the pushing plate of the feeding machine and the molten glass surface of the tin liquid is expanded. distance. According to past experience, the kiln with a specification of 300t/d can be filled with a thickness of 100mm, while the kiln with a specification of 500t/d or more should have a thickness of about 180mm.
The accuracy of the operation of the feeder has an important influence on the melting speed of the batch material in the production process of the float glass and the position of the bubble boundary and the position of the pile. The uniformity of the movement of the feeder and the opening of the gate are directly related to the correct feeding. In order to ensure that the thickness of the pile is relatively uniform and the material level is stable, the position of the feeder must be accurately adjusted to ensure the synchronization of the motion of the two sides of the feeder and the reasonable opening of the respective gates.
During the operation, the control requirements of the (slant blanket type) feeder are as follows: (1) The feeding shovel should ensure that the material layer is fully covered on the glass surface while ensuring that the material layer is thin and straight, ensuring that it is against the melting pool. The impact force of the wall is relatively small and the material layer is not doped with the material; (2) the rationality of the feeding position of the feeder is ensured, usually the central opening is 150-200 mm, and the edge opening is 100- 150mm is appropriate, at the same time, to ensure that the mixing material in the process of entering the feeding machine has a small drop, and keep the material stacking line clear and tidy; (3) when it is found that there are eight characters or biased materials, it should be timely Adjust the opening of the feeder shutter to ensure that the compound material type can return to normal in a short time.
The specific requirements for the operation of the feeder are as follows: (1) At the beginning of the feeding, the working performance of the feeder is studied, including the speed of the feeder, the opening of the ram, the height of the hoe, the angle of inclination, etc., to ensure that the feeder is Good state is put into the feeding process of float glass production; (2) When the equipment is in operation state, it is necessary to carry out real-time inspection of each traditional component according to relevant regulations and operation requirements to judge whether it is in normal working state and observe at the same time Whether the fastening parts are loose or not, and the smoothness of the feeding table is determined; (3) If there is a need for manual feeding, the feeding amount should be adjusted in time, and on the basis of maintaining the original liquid level, It is necessary to check the motor voltage, current and operating temperature of the feeder and the normal operation of the traditional system to ensure the accuracy and reliability of manual feeding, and to ensure the personal safety during the feeding process; (4) Keep the feeder always in good condition. Hygienic state, especially for traditional parts, does not allow any debris, in addition to the need to Ensure that each lubrication part has a good lubrication effect. It should be noted that it is necessary to check the lubrication condition of the bearing frequently. The oil temperature needs to be kept within 40 °C at all times, and according to the corresponding lubrication regulations, each lubricating point should be regularly filled with lubricating grease to prevent the feeding machine from being in a state of lack of oil. put into service.
4, the conclusion
In this paper, through the analysis of the production process of float glass, the characteristics of the ridge type feeder and the blanket type feeder are explored, and the inclined blanket type feeder in the blanket type feeder is taken as an example, respectively, from the feeding mode and The operation and adjustment aspects of the oblique blanket feeder in the float glass production line are fully explored. The research results show that the introduction and application of the inclined blanket feeder in the float glass production line can reduce the energy consumption of the glass production and standardize the material type and increase the melting speed, which plays an important role in improving the production efficiency and quality of the float glass. significance.
Men Boots Welt Goodyear Construction
Ture Potential Limited , https://www.ldgsshoes.com