Tile line overall renovation program

With the continuous development of the national economy and the continuous deepening of China's accession to the WTO and economic globalization, people are increasingly aware of the importance of carton packaging in the process of commodity circulation. Through good packaging design, the purpose of product appreciation is achieved. It is difficult for a clever woman to be without straw, a quality qualified carton, if there is no qualified cardboard as a prerequisite, then talk about qualified carton it! After the corrugated board production line is used, along with the wear of equipment components, the production efficiency will be greatly reduced and the production cost will be increased. For example, the energy consumption will increase, the production speed will decrease, the sizing amount of the corrugated board will increase, and the sizing will not be accurately ensured, resulting in cardboard bonding. Bad, collapsed, compressive strength, and abrasion resistance cannot meet customer requirements. At the same time, changes in the flatness of the hot plate (baking plate) also affect the heat exchange; the loss of steam due to wear of the hydrophobic system increases, or the water cannot be properly drained due to the blockage. The temperature of the heated part cannot be guaranteed. In response to the above problems, our company has invested a lot of manpower and material resources, constantly explored and explored, summed up experience and lessons, and came up with a set of plans to transform the cardboard production line. Compared with the purchase of new cardboard lines, the company invested less, has quick results, and can achieve immediate results. Effect, the following example, talk about the transformation of corrugated board production line: the touch bar and the thermal pressure plate transformation touch bar: the traditional form of the sizing machine is to use pressure roller to complete the sizing of corrugated paper, and then adjust the pressure roller and sizing roller In the gap, corrugated paper is sized after passing through the gap.

Therefore, there are the following defects:

First, because the gap is less than the height of the corrugated paper in the free state, the corrugation is deformed after the sizing, and the paperboard is resistant to pressure and breaking.

The second reason is that the glue line is not correct and is too wide. In addition to the top of the corrugation, there is pulp on the side of the sizing. In this way, the bonded cardboard has different degrees of sloping, pitting, bending, etc., which also seriously affects the cardboard. The side pressure equal intensity, but also inconvenience to the processing of the subsequent process;

Third, due to the radial run-out of the workpieces (including anilox rollers, press rollers, etc.), the uniformity of corrugating sizing is also affected, and the phenomenon of cardboard blistering and poor adhesion is easily caused. The installation and use of the touch bar not only completely changes the occurrence of the above-mentioned undesirable phenomena, but also improves the quality of the paperboard. Moreover, due to the reduction of the amount of sizing, the glue is saved, the speed of the cardboard line is increased, the production efficiency is further improved, and the production is reduced. cost. The contact pressure bar consists of a piece of wear-resistant stainless steel (tungsten carbide can also be selected). It is driven by a spring and presses the corrugated paper pulp in an elastic state to ensure that the position of the corrugated paper and the corrugation are not damaged. Thermal platen: The working principle of thermal platen is similar to the contact pressure bar. It is also composed of a piece of wear-resistant stainless steel plate. Under the force of the spring, the corrugated board is pressed against the hot plate through the sail belt to accelerate the energy exchange and maximize the use of energy. Thermal press plates are used in the drying section of corrugated board production lines to replace traditional press rollers. Their purpose is to:

First, the traditional form of the pressure roller tends to cause partial wear on the baking sheet. A new cardboard production line, after 1 to 2 years of use, will find that with the pressure roller position, the amount of heat plate wear can reach 1mm ~ 2mm, some of the hot plate wear of our transformation line is up to 4mm. In this way, when the corrugated board is heated by a hot plate, the running trajectory of the paperboard is the “S” type, which affects the molding of the board and at the same time reduces the speed of the production line, which is not conducive to the board bonding.

Second, compared with the pressure roller, the heat pressure plate is pressed by the pressure roller, the contact area between the paperboard and the hot plate is small, and the use of the heat pressure plate to suppress the belt can greatly increase the contact area between the paperboard and the hot plate, and ensure the requirement for forming the paperboard. Heat, especially the much-needed heat set in the front part of the dryer section.

Thirdly, the use of a hot platen can overcome the poor contact between the cardboard board and the hot plate due to the thermal deformation of the baking plate and affect the heat exchange.

Fourth, since the height of the thermal platen is achieved through automatic control, it can be automatically controlled when producing different thicknesses and different layers of cardboard, which ensures the thickness of the cardboard, especially the same thickness in different width and direction. Hydrophobic system problems Traditional form of production line Hydrophobic traps used in the drain system are mostly batch type, which is not conducive to the heat demand under continuous production conditions. The straight-through high efficiency steam trap developed by our company can not only meet the requirements of continuous production of cardboard production line. The heat demand, and compared with other products of the same type, can reduce energy consumption, have a long service life, and at the same time, due to the generation of back pressure, it can increase the temperature of the heating part. The use of steam recovery machines for steam recovery machines is a new type of energy-efficient product.

The working principle is to directly press the condensate in the steam and the steam carried by it into the boiler through the double-compression cylinder, so that the boiler, the steam and the steam recovery unit form a closed circulation loop, so as to save the coal and save fuel. , provincial water, provincial water, energy saving and other energy-saving purposes. At the same time, as the number of times that the boiler replenish cold water due to evaporation decreases, the time for which the boiler maintains pressure within a set pressure range increases, ie, the number of times of reheating to increase the temperature is reduced, and the supply of heat to the heating portion of the production line is also constant. It is also beneficial to improve the quality of the board and increase the speed.

At present, the installation and use of steam recovery machines for a number of paper mills, paper mills, and plywood mills prove the high energy efficiency of steam recovery machines. Such as Guangdong Dongguan Qinghe Xiehe Paper Products Factory, Shandong Rizhao Jinbao Carton Factory and other manufacturers, after the installation of steam recovery machine, saving coal up to 18%, saving water more than 2 tons per hour. At the same time, the service life of the water pump on the boiler has also been increased by more than 60%.

Source: Guangzhou Taizan Electrical and Mechanical Equipment Co., Ltd.