CN210362967U

CN210362967U - Drying box of gravure printing machine

Info

Publication number: CN210362967U
Application number: CN201920635778.8U
Authority: CN
Inventors: 沈伟荣; 韩伟平; 吴建军; 庄权
Original assignee: Shanghai Jielong Yongfa Printing & Packing Co ltd
Current assignee: Shanghai Jielong Yongfa Printing & Packing Co ltd
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2020-04-21
Anticipated expiration: 2029-05-06

Abstract

The utility model relates to an intaglio press stoving case, including the air inlet chamber, dry by the fire the material chamber and air exhaust the chamber, the air inlet chamber is equipped with the air intake, it is equipped with feed inlet and discharge gate to dry by the fire the material chamber, it is equipped with a plurality of deflector rolls on the conveying path of material intracavity portion edge printing material to dry by the fire, air inlet chamber and dry by the fire and be equipped with a plurality of tuyeres between the material chamber, the air inlet end and the air inlet chamber intercommunication of tuyeres, the air-out end is relative with the conveying path of printing material, air exhaust the chamber and separate the chamber of discharging under and form through the baffle, it communicates through a plurality of first air pipes to discharge the chamber down with the conveying path anterior segment that dries by the fire the material chamber, it communicates through a plurality of second air pipes to go up air exhaust chamber and the conveying path rear. The utility model discloses be favorable to improving energy-conserving effect, be favorable to the solution of waste gas thermal pollution and organic matter pollution problem.

Description

Drying box of gravure printing machine

Technical Field

The utility model belongs to the technical field of intaglio printing ink is dried, especially, relate to an intaglio printing machine stoving case.

Background

In the intaglio printing process, in order to dry the printing ink, a drying box is arranged on the intaglio printing press, after the air at normal temperature is heated by a heating box, the hot air is blown out of the drying box through an air nozzle and is blown to the surface of the printing material so as to dry the printing ink on the surface of the printing material. This process consumes a large amount of heat, and after the hot air is used to dry the printing substrate, in order to save energy, a part of the high-temperature exhaust gas containing a certain organic solvent is generally recycled, and the recycled hot air of this part cannot be recycled too much, for reasons including the following:

first, the exhaust gas containing a certain concentration of organic solvent directly affects the volatilization speed of the solvent in the ink, and when the exhaust gas containing the organic solvent reaches the saturation concentration, the solvent in the ink can not be volatilized any more theoretically.

Secondly, when too much volatile organic solvent waste gas is recycled to the electric heating box, the heating box is easy to explode.

The structure of the existing drying box generally comprises an air inlet, which is used for feeding hot air heated by a heating box into the drying box through a blower; and the air outlet is used for discharging the waste gas with the volatile organic solvent with certain concentration in the drying box out of the drying box. In fact, the printing material has a certain path length in the process of passing through the drying box, when the printing material just enters the first half section of the drying box, the solvent volatilization amount on the printing material is the largest, the non-volatilized solvent on the printing material is rapidly reduced along with the advance of the printing material, and the volatilized organic solvent amount in the second half section of the drying box is only 1/3-1/5 of the solvent volatilization amount in the first half section of the drying box. Therefore, the concentration of the waste gas volatilized from the front half section of the drying box is far higher than that of the waste gas volatilized from the rear half section of the drying box, and the existing drying box does not utilize the characteristic.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a photogravure press stoving case is provided, improves energy-conserving effect, is favorable to the solution of waste gas thermal pollution and organic matter pollution problem.

The technical proposal adopted by the utility model to solve the technical problems is to provide a drying box of the gravure printing machine, which comprises an air inlet cavity, a material drying cavity and an air exhaust cavity, the air inlet cavity is provided with an air inlet, the material drying cavity is provided with a feed inlet and a discharge outlet, a plurality of guide rollers are arranged in the material drying cavity along the conveying path of the printing material, a plurality of air nozzles are arranged between the air inlet cavity and the material drying cavity, the air inlet end of each air nozzle is communicated with the air inlet cavity, the air outlet end of each air nozzle is opposite to the conveying path of the printing material, the exhaust cavity is divided by a partition plate to form an upper exhaust cavity and a lower exhaust cavity, the lower exhaust cavity is communicated with the front section of the conveying path of the material drying cavity through a plurality of first air pipes, the upper air exhaust cavity is communicated with the rear section of a conveying path of the material drying cavity through a plurality of second air exhaust pipes, the lower air exhaust cavity is provided with a first air exhaust opening, and the upper air exhaust cavity is provided with a second air exhaust opening.

The number of the blast nozzles is the same as that of the guide rollers, and the air outlet end of each blast nozzle corresponds to each guide roller respectively.

The inside reducing structure that forms of tuyere air-out section and air-out end form outside hem.

The guide rollers are arranged to be 6-15, and the distance between every two adjacent guide rollers is larger than or equal to 150 mm.

Advantageous effects

The utility model discloses in, exhaust structural design can collect respectively the high concentration volatile organic compounds waste gas that the material chamber transport path anterior segment produced and the low concentration volatile organic compounds waste gas that the material chamber transport path back end produced, wherein low concentration volatile organic compounds waste gas can direct retrieval and utilization be used for printing ink to dry, energy-conserving effect is improved, high concentration volatile organic compounds waste gas can be handled and utilize its heat and organic matter more conveniently, the work efficiency of volatile organic compounds treatment facility is improved and the treatment cost is reduced, be favorable to the solution of printing stoving waste gas thermal pollution and organic matter pollution problem.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention and a printing machine.

Fig. 2 is a schematic diagram of the external side view structure of the present invention.

Fig. 3 is a schematic diagram of the internal side view structure of the present invention.

Fig. 4 is a schematic view of the internal front structure of the present invention.

Fig. 5 is a schematic structural view of the tuyere of the present invention.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

The drying box of the intaglio printing press as shown in figures 1 to 4 comprises an air inlet chamber 1, a material drying chamber 2 and an air exhaust chamber 3.

As shown in fig. 1, the drying box is arranged on a printing path of an intaglio printing press, the drying cavity 2 is provided with a feeding port 5 and a discharging port 6, ten guide rollers 8 are arranged on a conveying path along a printing material 7 inside the drying cavity 2, the printing material 7 enters the drying cavity 2 of the drying box through the feeding port 5 after being subjected to intaglio printing, the printing material 7 is supported by the guide rollers 8, and the printing material 7 is dried in the conveying process and is led out through the discharging port 6, so that the purpose of drying the ink on the printing material 7 is achieved.

The air inlet cavity 1 is provided with an air inlet 4, the air inlet 4 is communicated with an air outlet of the air heater, and hot air heated by the air heater is sent into the air inlet cavity 1 of the drying box through the air inlet 4. Ten air nozzles 9 are welded between the air inlet cavity 1 and the material drying cavity 2, the air inlet end of each air nozzle 9 is communicated with the air inlet cavity 1, the air outlet end of each air nozzle 9 corresponds to each guide roller 8, and the printing materials 7 penetrate between the guide rollers 8 and the air nozzles 9 for drying.

As shown in fig. 5, a reducing structure is formed inside the tuyere 9 near the air outlet end, which is beneficial to increasing the wind speed, and the air outlet end forms an outward folded edge, which is beneficial to hot air diffusion. The optimal width of the air outlet of the air nozzle 9 is 3mm, the width of the folded edge of the air outlet end of the air nozzle 9 is at least more than 30mm, the optimal width is 60mm, and the distance between the adjacent guide rollers 8 is more than or equal to 150 mm. The number of the air nozzles 9 and the number of the guide rollers 8 in the drying box are determined by factors such as the printing speed of the printing machine, and the higher the printing speed is, the more the number of the guide rollers 8 and the air nozzles 9 in the drying box is, and the number is usually between 6 and 15.

The hot air after drying the ink on the surface of the printing material 7 is the waste gas containing volatile organic compounds, and needs to be discharged from the material drying chamber 2. The exhaust cavity 3 is divided by a partition plate 10 to form an upper exhaust cavity 3-1 and a lower exhaust cavity 3-2, the lower exhaust cavity 3-2 is provided with a first exhaust port 13, and the upper exhaust cavity 3-1 is provided with a second exhaust port 14. The upper exhaust cavity 3-1 is communicated with the rear section of the conveying path of the material drying cavity 2 through five rows of second air passing pipes 12, and the volatile organic compounds in the waste gas generated at the rear section of the material drying cavity 2 have low concentration, enter the upper exhaust cavity 3-1 through the second air passing pipes 12 under the action of negative pressure and are exhausted through a second air outlet 14. The concentration of volatile organic compounds in the part of waste gas is low, and the part of waste gas can directly return to the air heater for recycling the heat of the waste gas, so that the heating energy consumption can be reduced by more than 20%.

The lower air exhaust cavity 3-2 is communicated with the front section of the conveying path of the material drying cavity 2 through four rows of first air exhaust pipes 11, volatile organic compounds in waste gas generated by the front section of the material drying cavity 2 are high in concentration, enter the lower air exhaust cavity 3-2 through the first air exhaust pipes 11 under the action of negative pressure, and are exhausted through the first air exhaust port 13. The volatile organic compounds contained in the part of waste gas have higher concentration, the purposes of reducing wind and increasing concentration are realized, namely, the exhaust air volume is reduced, the concentration of the volatile organic solvents in the waste gas is increased, and the high-concentration waste gas can be reused in two ways: the first method is to exchange heat between the heat in the waste gas and the fresh air at normal temperature in a heat exchange and mass exchange-free manner, and exchange the heat into the fresh air of the printing machine, so as to further reduce the energy consumption; the second method is to send the high-concentration waste gas to an RTO volatile organic solvent recovery system to burn off the volatile organic solvent, so that the use efficiency of energy can be further improved, and the purposes of energy conservation, consumption reduction, environmental protection and continuous development are achieved.

Claims

1. The utility model provides an intaglio press stoving case, includes air inlet chamber (1), dries by fire material chamber (2) and air exhaust chamber (3), its characterized in that: the air inlet cavity (1) is provided with an air inlet (4), the material drying cavity (2) is provided with a feed inlet (5) and a discharge outlet (6), a plurality of guide rollers (8) are arranged in the material drying cavity (2) along a conveying path of a printing material (7), a plurality of air nozzles (9) are arranged between the air inlet cavity (1) and the material drying cavity (2), an air inlet end of each air nozzle (9) is communicated with the air inlet cavity (1), an air outlet end of each air nozzle is opposite to the conveying path of the printing material (7), the air exhaust cavity (3) is separated by a partition plate (10) to form an upper air exhaust cavity (3-1) and a lower air exhaust cavity (3-2), the lower air exhaust cavity (3-2) is communicated with the front section of the conveying path of the material drying cavity (2) through a plurality of first air-passing pipes (11), the upper air exhaust cavity (3-1) is communicated with the rear section of the conveying path of the material drying cavity (2) through a plurality of, the lower air exhaust cavity (3-2) is provided with a first air exhaust opening (13), and the upper air exhaust cavity (3-1) is provided with a second air exhaust opening (14).

2. An intaglio printing press drying box according to claim 1, characterized in that: the number of the blast nozzles (9) is the same as that of the guide rollers (8), and the air outlet ends of the blast nozzles (9) correspond to the guide rollers (8) respectively.

3. An intaglio printing press drying box according to claim 1, characterized in that: the inside reducing structure that forms of tuyere (9) air-out section and air-out end form outside hem.

4. An intaglio printing press drying box according to claim 1, characterized in that: the guide rollers (8) are arranged to be 6-15, and the distance between every two adjacent guide rollers (8) is larger than or equal to 150 mm.