一种循环再利用凹印环保节能减排热风干燥系统Recycling and recycling gravitation environmental protection energy saving and reducing hot air drying system
本发明涉及凹印机技术领域，尤其是涉及一种循环再利用凹印环保节能减排热风干燥系统。The invention relates to the technical field of gravure printing machines, in particular to a recycling and recycling gravitation environmental protection energy-saving and emission reduction hot air drying system.
干燥系统的优劣和利用率直接影响了能源的消耗，在传统的干燥系统中，凹印烘道内设置有拱形导辊，通过的气流被加热为热风，采用直流式烘干过程，由进气口进入凹印烘道，再由排气口直接排放，其结构不合理，烘干效果差，常用的凹印机的凹印烘道都是采用传统的结构设计。The advantages and disadvantages of the drying system and the utilization rate directly affect the energy consumption. In the traditional drying system, the arched guide roller is arranged in the gravure drying tunnel, and the passing airflow is heated to hot air, and the direct current drying process is adopted. The gas inlet enters the gravure drying tunnel and is directly discharged from the exhaust port. The structure is unreasonable and the drying effect is poor. The gravure drying tunnel of the commonly used gravure printing machine adopts the traditional structural design.
这种传统热风干燥系统的缺点在能源消耗大，热量利用率非常低，主要原因是：1)由于热风流动速度快，热风流动方向与材料运动的方向平行，导致了热风与材料接触不充分，烘干效果差；2)烘干过程大部分热量直接向外散发而流失，而且热风没有重复利用，造成能源的浪费。因此，凹印机干燥系统亟需得到改善。The disadvantages of this traditional hot air drying system are high energy consumption and low heat utilization. The main reasons are: 1) Due to the fast flow of hot air, the direction of hot air flow is parallel to the direction of material movement, resulting in insufficient contact between hot air and materials. The drying effect is poor; 2) Most of the heat in the drying process is directly emitted and lost, and the hot air is not reused, resulting in waste of energy. Therefore, the gravure drying system needs to be improved.
【发明内容】[Summary of the Invention]
针对现有技术的不足，本发明的目的在于一种循环再利用凹印环保节能减排热风干燥系统，采用该系统可以将凹印烘道内的热风重复应用从而实现热风回用，提高了烘干效果和热能利用率。In view of the deficiencies of the prior art, the object of the present invention is a recycling and recycling gravitation environmental protection energy-saving and emission reduction hot air drying system, which can repeatedly apply hot air in the gravure drying tunnel to realize hot air recycling and improve drying. Effect and heat utilization.
为实现上述目的，本发明提供的方案为：To achieve the above object, the present invention provides a solution of:
一种循环再利用凹印环保节能减排热风干燥系统，包括凹印烘道和气管，所述凹印烘道内设置有若干用于输送材料的导辊，所述凹印烘道沿材料输送方向分为依次串联的若干个烘箱单元，其特征在于：各所述烘箱单元内有若干个喷嘴，各所述烘箱单元均设置有进气口和排气口，所述烘干空气通过气管进入位于出膜端烘箱单元的进气口，其余各烘箱单元进气口分别连接上一个烘箱单 元的排气口，入膜端烘箱单元的排气口排出。A recycling and recycling gravitation environmental protection energy-saving and emission reduction hot air drying system comprises a gravure drying tunnel and a gas pipe, wherein the gravure drying tunnel is provided with a plurality of guiding rollers for conveying materials, and the gravure drying tunnel is along the material conveying direction The plurality of oven units are sequentially connected in series, wherein each of the oven units has a plurality of nozzles, and each of the oven units is provided with an air inlet and an exhaust port, and the drying air is located through the air pipe. The air inlet of the oven unit of the film exiting end, the air inlets of the remaining oven units are respectively connected to the exhaust port of the upper oven unit, and the exhaust port of the oven unit of the film inlet end is discharged.
进一步地，各所述喷嘴分别位于导辊上方。Further, each of the nozzles is located above the guide roller.
更进一步地，所述喷嘴的朝向垂直于导辊上方材料的表面。这使得材料在烘箱单元内可以快速平稳均匀地干燥。Still further, the nozzle is oriented perpendicular to the surface of the material above the guide roller. This allows the material to dry quickly and evenly in the oven unit.
进一步地，所述各串联的烘箱单元呈半个拱门的形状。Further, each of the series of oven units is in the shape of a half arch.
进一步地，所述位于出膜端烘箱单元的进气口通过气管与热泵连接，风机将热风送入进气口。热泵技术是近年来在全世界倍受关注的新能源技术。它是一种能从自然界的空气、水或土壤中获取低位热能，经过电能做功，提供可被人们所用的高位热能的装置。也可以采用其它类似的热源代替热泵。Further, the air inlet of the oven unit located at the outlet end is connected to the heat pump through a gas pipe, and the fan sends hot air to the air inlet. Heat pump technology is a new energy technology that has received worldwide attention in recent years. It is a device that can obtain low-level heat energy from the air, water or soil of nature, and work through electric energy to provide high-level heat energy that can be used by people. Other similar heat sources can be used instead of the heat pump.
更进一步地，所述各烘箱单元的热风经过排气口通过风机送到下一个烘箱单元中。也就是说，除了位于出膜端烘箱单元，其余各烘箱单元进气口分别连接上一个烘箱单元的排气口，进气口与排气口之间有风机连接，进行抽气和进气交换。这可以加快烘干空气的流动速度，增强烘干效果。Further, the hot air of each of the oven units is sent to the next oven unit through the exhaust port through the fan. That is to say, in addition to the oven unit located at the exit end, the air inlets of the remaining oven units are respectively connected to the exhaust port of the previous oven unit, and there is a fan connection between the air inlet and the exhaust port for pumping and air exchange. . This can speed up the flow of the drying air and enhance the drying effect.
进一步地，各所述烘箱单元由档板将凹印烘道分隔而成，挡板开有可让材料通过的细缝。挡板将凹印烘道分隔使得烘箱单元内的材料和挡板之间的热风形成独立循环，提高热能功效。Further, each of the oven units is separated by a baffle plate, and the baffle is provided with a slit for allowing material to pass through. The baffles separate the gravure drying channels so that the hot air between the material in the oven unit and the baffles form an independent cycle, improving thermal energy efficiency.
优选地，所述烘箱单元内有风压检测装置，用于监测烘箱单元内的风压。Preferably, the oven unit has a wind pressure detecting device for monitoring the wind pressure in the oven unit.
优选地，所述烘箱单元内有温度检测装置，用于监测烘箱单元内的温度。Preferably, the oven unit has temperature sensing means for monitoring the temperature within the oven unit.
优选地，所述烘箱单元的数量为四个。Preferably, the number of oven units is four.
本发明对照现有技术的有益效果是：The beneficial effects of the present invention against the prior art are:
1)、凹印烘道中的若干个烘箱单元串联连接，每个烘箱单元用挡板隔离，烘箱内的热风流动的方向与材料垂直，使得烘干空气与材料的接触面积增大，并且让尽可能多的烘干空气都能够与材料之间进行热传递，从而提高了烘干空气的利用率，改善了烘干效果；1) Several oven units in the gravure drying tunnel are connected in series, and each oven unit is isolated by a baffle, and the direction of the hot air flowing in the oven is perpendicular to the material, so that the contact area between the drying air and the material is increased, and the exhausting is completed. There may be more dry air that can transfer heat between the materials, thereby improving the utilization of the dry air and improving the drying effect;
2)而通过对热风的不断分段烘干，从而让热量得到充分利用，提高了烘干效果和热能利用率。2) By continuously drying the hot air, the heat is fully utilized, and the drying effect and heat utilization rate are improved.
2)、各烘箱单元的排气口分别连接下一个烘箱单元的进气口，组成封闭的内循环干燥系统，实现了对热风的多次循环利用，提高能源利用率，节省了能源成本，降低了废弃排量，达到节能减排作用。2) The exhaust ports of the oven units are respectively connected to the air inlets of the next oven unit to form a closed internal circulation drying system, which realizes multiple recycling of hot air, improves energy utilization, saves energy costs, and reduces Abandoned displacement to achieve energy saving and emission reduction.
【附图说明】[Description of the Drawings]
图1为本发明干燥系统的立体图；Figure 1 is a perspective view of the drying system of the present invention;
图2为本发明干燥系统的结构示意图。2 is a schematic view showing the structure of a drying system of the present invention.
图中：1-第一烘箱单元；2-第二烘箱单元；3-第三烘箱单元；4-第四烘箱单元；5-凹印烘道；6-第一气管；7-第二气管；8-第三气管；9-第四气管；10-第五气管；11-导辊；12-第一喷嘴；13-第二喷嘴；14-第三喷嘴；15-第四喷嘴；16-挡板；17-第一进气口；18-第一排气口；19-第二进气口；20-第二排气口；21-第三进气口；22-第三排气口；23-第四进气口；24-第四排气口；25-第一风机；26-第二风机；27-第三风机；28-第四风机；29-第五风机。In the figure: 1-first oven unit; 2-second oven unit; 3-third oven unit; 4-fourth oven unit; 5-gravure drying tunnel; 6-first air tube; 7-second air tube; 8-third air pipe; 9-fourth air pipe; 10- fifth air pipe; 11-guide roller; 12-first nozzle; 13-second nozzle; 14-third nozzle; 15-four nozzle; 16-block Plate; 17-first air inlet; 18-first air outlet; 19-second air inlet; 20-second air outlet; 21-third air inlet; 22-third air outlet; 23-fourth intake port; 24-fourth exhaust port; 25-first fan; 26-second fan; 27-third fan; 28-fourth fan; 29-fifth fan.
下面结合具体实施例对本发明作进一步说明：The present invention will be further described below in conjunction with specific embodiments:
本发明公开了应用于循环再利用凹印环保节能减排热风干燥系统，参见图1和图2，本发明热风干燥系统包括凹印烘道5和气管。凹印烘道5内设置有若干用于输送材料的导辊11，所述凹印烘道5沿材料输送方向分为依次串联的若干个烘箱单元，本实施例中第一烘箱单元1的左下侧箭头为出膜端，第四烘箱单元4右下侧箭头为进膜端，由导辊11构成的输送线上的材料依次通过第四烘箱单元4、第三烘箱单元3、第二烘箱单元2和第一烘箱单元1，所述第一烘箱单元1的第一进气口17通过第一气管6与热泵连接，所述第四烘箱单元4的排气口通过第五气管10连接排除气体。本实施例中烘箱单元的数量是四个，分别是第一烘箱单元1，第二烘箱单元2，第三烘箱单元3，第四烘箱单元4，四个烘箱单元依次串联起来呈半个拱门形状。The invention discloses an environmental protection energy-saving and emission reduction hot air drying system applied to the recycling and re-use gravure. Referring to FIG. 1 and FIG. 2, the hot air drying system of the present invention comprises a gravure drying tunnel 5 and a gas pipe. A plurality of guide rollers 11 for conveying materials are disposed in the gravure drying tunnel 5, and the gravure drying tunnels 5 are divided into a plurality of oven units connected in series in the material conveying direction, and the lower left side of the first oven unit 1 in this embodiment The side arrow is the film exit end, the arrow on the lower right side of the fourth oven unit 4 is the film entrance end, and the material on the conveyor line formed by the guide roller 11 sequentially passes through the fourth oven unit 4, the third oven unit 3, and the second oven unit. 2 and the first oven unit 1, the first air inlet 17 of the first oven unit 1 is connected to the heat pump through the first air pipe 6, and the exhaust port of the fourth oven unit 4 is connected to the exhaust gas through the fifth air pipe 10. . In this embodiment, the number of oven units is four, which are a first oven unit 1, a second oven unit 2, a third oven unit 3, a fourth oven unit 4, and four oven units are connected in series to form a half arch shape. .
为了有效利用凹印烘道内热风所含的热能，在发明中，将当前烘箱单元的多余热风送往相邻烘箱单元内。本实施例中，第一烘箱单元1的第一排气口18与第二烘箱单元2的第二进气口19通过第二气管7连接，中间经过第二风机26，进行热风的抽气和进气交换。同理，第二烘箱单元2的第二排气口20与第三烘箱单元3的第三进气口21通过第三气管8连接，中间经过第三风机27，进行热风的抽气和进气交换。同理，第三烘箱单元3的第三排气口22与第四烘箱单元4的第四进气口23通过第四气管9连接，中间经过第四风机28，进行热风的抽气和进行交换。最后第四烘箱单元4的第四排气口24通过第五气管10连接第五风机29，将气体排出。In order to effectively utilize the heat energy contained in the hot air in the gravure drying tunnel, in the invention, the excess hot air of the current oven unit is sent to the adjacent oven unit. In this embodiment, the first exhaust port 18 of the first oven unit 1 and the second air inlet 19 of the second oven unit 2 are connected by the second air pipe 7, and the second fan 26 is passed through, and the hot air is pumped and Intake exchange. Similarly, the second exhaust port 20 of the second oven unit 2 is connected to the third intake port 21 of the third oven unit 3 through the third air pipe 8, and passes through the third fan 27 in the middle to perform suction and intake of hot air. exchange. Similarly, the third exhaust port 22 of the third oven unit 3 and the fourth air inlet 23 of the fourth oven unit 4 are connected by the fourth air pipe 9, and the fourth fan 28 is passed through, and the hot air is pumped and exchanged. . Finally, the fourth exhaust port 24 of the fourth oven unit 4 is connected to the fifth fan 29 through the fifth air pipe 10 to discharge the gas.
所述烘箱单元内还设有检测风力大小的压力传感器、检测温度高低的温度传感器。The oven unit is further provided with a pressure sensor for detecting the magnitude of the wind and a temperature sensor for detecting the temperature.
基于上述设置，本发明所述热风干燥系统工作时，第一风机25将热泵的烘干空气(热风)通过第一气管6从第一进气口17送入第一烘箱单元1内，第一烘箱单元1内的第一喷嘴12将热风喷到导辊6的材料上，受到挡板16阻挡，热风在第一烘箱单元1内形成一个小的内循环，使第一烘箱单元1内的材料可以快速平稳均匀地干燥，提高烘干效果，而回流热风又通过第一烘箱单元1的第一排气口18进入第二气管7，第二风机26在第二气管7中进行了抽气和进气的交换，将热风从第二进气口19送入第二烘箱单元2中。同理，第二烘箱单元2内的第二喷嘴13将热风均匀喷到导辊的材料上，受到挡板阻挡，热风在第二烘箱单元2内形成一个小的内循环，使第二烘箱单元2内材料快速均匀地干燥，提高烘干效果，而回流热风又通过第二烘箱单元2的第二排气口20进入第三气管8，第三风机27在第三气管8中进行了抽气和进气的交换，将热风从第三进气口21送入第三烘箱单元3中。同理，第三烘箱单元3内的第三喷嘴14将热风均匀喷到导辊的材料上，受到挡板阻挡，热风在第三烘箱单元3内形成一个小的内循环，使第三烘箱单元3内材料快速均匀地干燥，提高烘干效果，而回流热风又通过第三烘箱单元3的第三排气口22进入第四气管9，第四风机28在 第四气管9中进行了抽气和进气的交换，将热风从第四进气口23送入第四烘箱单元4中。最后，第四烘箱单元4内的第四喷嘴15将热风均匀喷到导辊的材料上，受到挡板阻挡，热风在第四烘箱单元4内形成一个小的内循环，使第四烘箱单元4内材料快速均匀地干燥，提高烘干效果，热风通过第四排气口24进入第五气管10，第五风机29把热气抽出，热泵再次利用抽出的热气进行循环的操作直到废气无法利用后排出。此外，可以对第四排气口24排出气体的溶剂废气的排气浓度进行检测，当该排气浓度超过国家标准值(或者涂布工艺中溶剂的LEL(爆炸下限)等预设的值)时，需要生产者根据实际情况加大第四烘箱单元4的排气量。Based on the above arrangement, when the hot air drying system of the present invention is in operation, the first fan 25 sends the dry air (hot air) of the heat pump through the first air pipe 6 from the first air inlet 17 into the first oven unit 1, first The first nozzle 12 in the oven unit 1 sprays hot air onto the material of the guide roller 6, blocked by the baffle 16, and the hot air forms a small internal circulation in the first oven unit 1, so that the material in the first oven unit 1 is made. The drying can be quickly and smoothly dried to improve the drying effect, and the return hot air enters the second air pipe 7 through the first exhaust port 18 of the first oven unit 1, and the second fan 26 performs pumping in the second air pipe 7. The exchange of intake air sends hot air from the second intake port 19 into the second oven unit 2. Similarly, the second nozzle 13 in the second oven unit 2 uniformly sprays hot air onto the material of the guide roller, is blocked by the baffle, and the hot air forms a small inner circulation in the second oven unit 2, so that the second oven unit 2 The inner material is quickly and evenly dried to improve the drying effect, and the return hot air enters the third air pipe 8 through the second exhaust port 20 of the second oven unit 2, and the third fan 27 performs pumping in the third air pipe 8. In exchange with the intake air, hot air is sent from the third intake port 21 into the third oven unit 3. Similarly, the third nozzle 14 in the third oven unit 3 uniformly sprays hot air onto the material of the guide roller, is blocked by the baffle, and the hot air forms a small inner circulation in the third oven unit 3, so that the third oven unit 3 The material is quickly and uniformly dried to improve the drying effect, and the return hot air enters the fourth gas pipe 9 through the third exhaust port 22 of the third oven unit 3, and the fourth fan 28 is pumped in the fourth gas pipe 9. In exchange with the intake air, hot air is sent from the fourth intake port 23 into the fourth oven unit 4. Finally, the fourth nozzle 15 in the fourth oven unit 4 uniformly sprays hot air onto the material of the guide roller, is blocked by the baffle, and the hot air forms a small inner circulation in the fourth oven unit 4, so that the fourth oven unit 4 The inner material is quickly and evenly dried to improve the drying effect. The hot air enters the fifth air pipe 10 through the fourth exhaust port 24, and the fifth fan 29 extracts the hot air, and the heat pump uses the extracted hot gas to perform the cycle operation until the exhaust gas cannot be used. . In addition, the exhaust gas concentration of the solvent exhaust gas from which the fourth exhaust port 24 is exhausted may be detected, and when the exhaust gas concentration exceeds a national standard value (or a preset value such as a solvent LEL (explosion lower limit) in the coating process) At the time, the producer needs to increase the displacement of the fourth oven unit 4 according to the actual situation.
对比传统的干燥系统，本发明的干燥系统在能源利用率方面获得极大的提高，独立的烘箱单元保证烘干效果，循环热风的回收节省了能源消耗，起到了节能减排效果。Compared with the traditional drying system, the drying system of the invention is greatly improved in energy utilization rate, the independent oven unit ensures the drying effect, the recycling of the circulating hot air saves energy consumption, and the energy saving and emission reduction effect is achieved.
此外，需要说明的是，本说明书中所描述的具体实施例，其各部分名称等可以不同，凡依本发明专利构思所述的构造、特征及原理所做的等效或简单变化，均包括于本发明专利的保护范围内。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，只要不偏离本发明的结构或者超越本权利要求书所定义的范围，均应属于本发明的保护范围。In addition, it should be noted that the specific embodiments described in the specification may have different names and the like, and equivalent or simple changes made by the structures, features and principles described in the patent concept of the present invention include Within the scope of protection of the present invention. A person skilled in the art can make various modifications or additions to the specific embodiments described or in a similar manner, without departing from the scope of the invention or the scope defined by the claims. All should fall within the scope of protection of the present invention.