Ink drying system of printing machine

Abstract

The invention relates to the technical field of ink drying, and particularly discloses a printing machine ink drying system which comprises a cooling-water machine, a hot water pipe set and a cold water pipe set. The first heat exchange device is circularly communicated with the cooling-water machine through a hot water pipe group; the second heat exchange device is circularly communicated with the cooling-water machine through a cold water pipe group; the circulating air duct assembly is provided with an exhaust outlet, an air outlet pipe and an air inlet pipe, the circulating air duct assembly communicates with the air inlet of the first heat exchange device through the air outlet pipe, the circulating air duct assembly communicates with the air outlet of the second heat exchange device through the air inlet pipe, and an air door is installed in the exhaust outlet and used for opening or closing the exhaust outlet; the drying oven is provided with an air inlet and an air outlet, the air inlet of the drying oven is communicated with the air outlet of the first heat exchange device, and the air outlet of the drying oven is communicated with the air inlet of the second heat exchange device. The ink drying system of the printing machine is high in heat efficiency, capable of reducing energy consumption and safe and reliable to use.

Description

Technical Field

[0001] The invention relates to the technical field of ink drying, in particular to a printing press ink drying system. Background Art

[0002] According to the process requirements of gravure printing, the ink is attached to the concave points of the image on the gravure cylinder, and then transferred to the soft substrate through printing pressure for packaging of various items. During the printing process, the water and solvent in the ink of the image printed on the printing substrate need to be evaporated and discharged, and the pigment resin in the ink needs to be dried. At present, the main source of high energy consumption of gravure printing machines is the drying of printed products, that is, the energy consumption of the oven of the gravure printing machine. In order to meet the requirements of energy conservation and environmental protection, improving the thermal efficiency of the oven is an urgent problem to be solved. Summary of the invention

[0003] The purpose of the present invention is to provide a printing press ink drying system which has high thermal efficiency, can reduce energy consumption, and is safe and reliable to use.

[0004] In order to achieve the above object, the present invention provides a printing press ink drying system, comprising:

[0005] A water chiller having a hot water pipe group and a cold water pipe group;

[0006] A first heat exchange device, in circulation communication with the chiller through the hot water pipe group;

[0007] A second heat exchange device is cyclically connected to the chiller through the cold water pipe group;

[0008] a circulating air duct assembly having an air outlet, an air outlet pipe and an air inlet pipe, wherein the circulating air duct assembly is connected to the air inlet of the first heat exchange device through the air outlet pipe, and the circulating air duct assembly is connected to the air outlet of the second heat exchange device through the air inlet pipe, and a damper is installed in the air outlet, and the damper is used to open or close the air outlet; and

[0009] The oven has an air inlet and an air outlet, the air inlet of the oven is connected to the air outlet of the first heat exchange device, the air outlet of the oven is connected to the air inlet of the second heat exchange device, and the oven is used to dry the ink of the printed matter.

[0010] In some embodiments, the first heat exchange device includes a water-gas heat exchanger and an electric heat exchanger, the chiller, the water-gas heat exchanger and the electric heat exchanger are circulated and connected through the hot water pipe group, and the circulating air duct assembly, the air outlet pipe, the water-gas heat exchanger, the electric heat exchanger and the air inlet of the oven are gas-connected in sequence.

[0011] In some embodiments, the second heat exchange device includes a condensing dehumidifier and a heat exchanger, the chiller, the condensing dehumidifier and the heat exchanger are circulated and connected through the cold water pipe group, and the air outlet of the oven, the heat exchanger, the condensing dehumidifier, the air inlet pipe and the circulating air duct assembly are connected in sequence.

[0012] In some embodiments, a hot water regulating valve and a cold water regulating valve are included. The hot water regulating valve is installed on the hot water pipe group, and the cold water regulating valve is installed on the cold water pipe group.

[0013] In some embodiments, the first heat exchange device, the second heat exchange device and the oven are each provided in plurality, and the plurality of the first heat exchange devices, the plurality of the second heat exchange devices and the plurality of the ovens are arranged in one-to-one correspondence.

[0014] In some embodiments, the circulating air duct assembly includes a circulating air duct, a connecting air duct and a circulating fan, the circulating fan is circulatingly connected to the circulating air duct through the connecting air duct, the exhaust port is arranged in the connecting air duct, and the air outlet pipe and the air inlet pipe are installed in the circulating air duct.

[0015] In some embodiments, a gas concentration detector is included, and the gas concentration detector is installed in the circulating air duct to detect the gas concentration inside the circulating air duct.

[0016] In some embodiments, the circulating air duct has a negative pressure automatic air inlet and a positive pressure automatic air exhaust.

[0017] In some embodiments, a first fan is included, and an air outlet of the first heat exchange device is connected to an air inlet of the oven through the first fan.

[0018] In some embodiments, a second fan is included, and the air outlet of the second heat exchange device is connected to the air inlet pipe through the second fan.

[0019] The present invention provides a printing press ink drying system, which has the following beneficial effects compared with the prior art:

[0020] The chiller is provided with a hot water pipe group and a cold water pipe group, and the first heat exchange device is circulated and connected with the chiller through the hot water pipe group, and the second heat exchange device is circulated and connected with the chiller through the cold water pipe group, and the air inlet of the oven is connected with the air outlet of the first heat exchange device, and the air outlet of the oven is connected with the air inlet of the second heat exchange device, so that the thermal efficiency of the oven is high and the energy consumption can be reduced; the circulating air duct assembly has an exhaust port, and a damper is installed in the exhaust port, and the circulating air duct assembly can be placed in a closed state or an open device through the damper to keep it safe and reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the first principle structure of a printing press ink drying system provided in some embodiments of the present invention.

[0022] Figure 2 A second principle structural diagram of a printing press ink drying system provided in some embodiments of the present invention.

[0023] In the figure: 1. Chiller; 11. Hot water pipe group; 12. Cold water pipe group; 13. Hot water regulating valve; 14. Cold water regulating valve; 2. First heat exchange device; 21. Water-gas heat exchanger; 22. Electric heat exchanger; 3. Second heat exchange device; 31. Condensation dehumidifier; 32. Heat exchanger; 4. Circulating air duct assembly; 41. Exhaust port; 42. Air outlet duct; 43. Air inlet duct; 44. Air door; 45. Circulating air duct; 46. Connecting air duct; 47. Circulating fan; 48. Negative pressure automatic air inlet; 49. Positive pressure automatic exhaust port; 5. Oven; 6. Gas concentration detector; 7. First fan; 8. Second fan. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0025] It should be understood that, in the description of the present application, the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, that is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.

[0026] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1-Figure 2As shown, the ink drying system for a printing press provided by an embodiment of the present invention comprises a water chiller 1, a first heat exchange device 2, a second heat exchange device 3, a circulating air duct assembly 4 and an oven 5. The water chiller 1 can generate hot water and cold water to exchange heat with the first heat exchange device 2 and the second heat exchange device 3 respectively, and the first heat exchange device 2 can heat the air input to the oven 5, and the second heat exchange device 3 can extract the exhaust gas in the oven 5, and realize condensation dehumidification to recover the moisture in the air.

[0028] The water chiller 1 has a hot water pipe group 11 and a cold water pipe group 12. Specifically, the water chiller 1 is an air-cooled water chiller, which can produce cold water and hot water.

[0029] The first heat exchange device 2 is cyclically connected to the chiller 1 through the hot water pipe group 11, so that the chiller 1 and the first heat exchange device 2 can exchange heat and increase the temperature of the first heat exchange device 2 to heat the air.

[0030] The second heat exchange device 3 is cyclically connected to the chiller 1 through the cold water pipe group 12, so as to achieve heat exchange between the chiller 1 and the second heat exchange device 3 and reduce the temperature of the second heat exchange device to condense and cool the air.

[0031] The circulating air duct assembly 4 has an exhaust port 41, an air outlet pipe 42 and an air inlet pipe 43. The circulating air duct assembly 4 is connected to the air inlet of the first heat exchange device 2 through the air outlet pipe 42, and the circulating air duct assembly 4 is connected to the air outlet of the second heat exchange device 3 through the air inlet pipe 43. A damper 44 is installed in the exhaust port 41, and the damper 44 is used to open or close the exhaust port 41. In this way, when the damper 44 is tightly closed, the open mode is realized, and when the damper 44 is closed, the closed mode is realized. Specifically, when using solvent-containing ink (alcohol ink), there is a fire and explosion hazard of solvent accumulation in the circulating air duct assembly 4, and only the open mode can be used, that is, the solvent-containing waste gas needs to be discharged and connected to the VOCs (volatile organic compounds) treatment system; when using solvent-free ink, there is no solvent accumulation in the circulating air duct assembly 4, no fire and explosion hazard, and the sealed mode can be used, which can reduce heat energy loss and save energy due to the influence of climate humidity and temperature.

[0032] The oven 5 has an air inlet and an air outlet. The air inlet of the oven 5 is connected to the air outlet of the first heat exchange device 2, and the air outlet of the oven 5 is connected to the air inlet of the second heat exchange device 3. The oven 5 is used to dry the ink of the printed matter. In this way, the exhaust gas discharged from the oven 5 after drying the printed matter contains a large amount of moisture, which is condensed and dehumidified by the second heat exchange device 3 to recover the moisture in the exhaust gas; at the same time, the second heat exchange device 3 exchanges and recovers the waste heat in the exhaust gas, and the dry exhaust gas exchanged by the dehumidification heat is sent to the circulating air duct component 4. The air in the circulating air duct component 4 exchanges with the first heat exchange device 2 to increase the temperature, and enters the oven 5 at an appropriate wind speed to dry the printed matter.

[0033] Based on the above structural setting, the chiller 1 has a hot water pipe group 11 and a cold water pipe group 12, the first heat exchange device 2 is connected to the chiller 1 in a circulation manner through the hot water pipe group 11, the second heat exchange device 3 is connected to the chiller 1 in a circulation manner through the cold water pipe group 12, the circulating air duct assembly 4 is connected to the air inlet of the first heat exchange device 2 through the air outlet pipe 42, the circulating air duct assembly 4 is connected to the air outlet of the second heat exchange device 3 through the air inlet pipe 43, a damper 44 is installed in the exhaust port 41, the damper 44 is used to open or close the exhaust port 41, the air inlet of the oven 5 is connected to the air outlet of the first heat exchange device 2, and the air outlet of the oven 5 is connected to the air inlet of the second heat exchange device 3, thereby achieving high thermal efficiency, reducing energy consumption, and being safe and reliable to use.

[0034] like Figure 1 As shown, in some embodiments, the first heat exchange device 2 includes a water-gas heat exchanger 21 and an electric heat exchanger 22, the water chiller 1, the water-gas heat exchanger 21 and the electric heat exchanger 22 are circulated and connected through the hot water pipe group 11, and the circulating air duct assembly 4, the air outlet pipe 42, the water-gas heat exchanger 21, the electric heat exchanger 22 and the air inlet of the oven 5 are sequentially connected by air paths. In this way, the hot water of the water chiller 1 heats the water-gas heat exchanger 21 and the electric heat exchanger 22, and the water-gas heat exchanger 21 and the electric heat exchanger 22 can heat the air input from the circulating air duct assembly 4 to the oven 5, so as to meet the drying temperature requirements of the oven 5 for printed products.

[0035] like Figure 1 As shown, in some embodiments, the second heat exchange device 3 includes a condensation dehumidifier 31 and a heat exchanger 32, the water chiller 1, the condensation dehumidifier 31 and the heat exchanger 32 are circulated and connected through the cold water pipe group 12, and the air outlet of the oven 5, the heat exchanger 32, the condensation dehumidifier 31, the air inlet pipe 43 and the circulating air duct assembly 4 are sequentially connected by air paths. In this way, the cold water of the water chiller 1 cools the condensation dehumidifier 31 and the heat exchanger 32, and the condensation dehumidifier 31 and the heat exchanger 32 can condense and cool the air output from the oven 5 to the circulating air duct assembly 4, and obtain dry air for recycling.

[0036] In some embodiments, the ink drying system of the printing press includes a hot water regulating valve 13 and a cold water regulating valve 14, wherein the hot water regulating valve 13 is installed on the hot water pipe group 11, and the cold water regulating valve 14 is installed on the cold water pipe group 12. The water content of the ink of each printed matter is different, and the cold water flow is controlled by the cold water regulating valve 14 to save the cooling capacity of the entire system; the hot water flow is controlled by the hot water regulating valve 13, the appropriate amount of heat is controlled, and the operating power of the chiller 1 is adjusted by feedback to save energy consumption.

[0037] like Figure 2 As shown, in some embodiments, the first heat exchange device 2, the second heat exchange device 3 and the oven 5 are provided in plurality, and the plurality of first heat exchange devices 2, the plurality of second heat exchange devices 3 and the plurality of ovens 5 are provided in one-to-one correspondence. A group of chillers 1 is used to realize the drying operation of the printed matter in the plurality of ovens 5 and the waste gas recovery.

[0038] like Figure 1 and 2 As shown, in some embodiments, the circulating air duct assembly 4 includes a circulating air duct 45, a connecting air duct 46 and a circulating fan 47, the circulating fan 47 is circulated and connected with the circulating air duct 45 through the connecting air duct 46, the exhaust port 41 is arranged in the connecting air duct 46, and the air outlet pipe 42 and the air inlet pipe 43 are installed in the circulating air duct 45. In this way, when using solvent-containing ink (alcohol ink), there is a risk of fire and explosion due to the accumulation of solvent in the circulating air duct assembly 4, and only the open mode can be used, that is, the solvent-containing waste gas needs to be discharged and connected to the VOCs (volatile organic compounds) treatment system; when using solvent-free ink, there is no solvent accumulation in the circulating air duct assembly 4, no fire and explosion risk, and the sealed mode can be used, which can reduce heat energy loss and save energy due to the influence of climate humidity and temperature.

[0039] In some embodiments, the ink drying system of the printing press includes a gas concentration detector 6, which is installed in the circulating air duct 45 and is used to detect the gas concentration inside the circulating air duct 45. Specifically, a flammable concentration value is set for the gas concentration detector 6, and when the flammable concentration value is exceeded, an alarm emergency stop signal is transmitted to the printing press, and an opening signal is transmitted to the damper 44.

[0040] like Figure 2 As shown, in some embodiments, the circulating air duct 45 is provided with a negative pressure automatic air inlet 48 and a positive pressure automatic air outlet 49. The negative pressure automatic air inlet 48 and the positive pressure automatic air outlet 49 are used to maintain the gas volume balance in the circulating air duct 45. Specifically, the function of automatic ventilation is realized by installing a one-way valve in the negative pressure automatic air inlet 48 and the positive pressure automatic air outlet 49.

[0041] like Figure 1As shown, in some embodiments, the ink drying system of the printing press includes a first fan 7, and the air outlet of the first heat exchange device 2 is connected to the air inlet of the oven 5 through the first fan 7. The first fan 7 is conducive to inputting the air in the first heat exchange device 2 into the oven 5.

[0042] like Figure 1 As shown, in some embodiments, the ink drying system of the printing press includes a second fan 8, and the air outlet of the second heat exchange device 3 is connected to the air inlet pipe 43 through the second fan 8. The second fan 8 is conducive to inputting the air in the second heat exchange device 3 into the circulation duct assembly 4.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A printing ink drying system, characterized in that: include: A water chiller having a hot water pipe group and a cold water pipe group; A first heat exchange device, in circulation communication with the chiller through the hot water pipe group; A second heat exchange device is cyclically connected to the chiller through the cold water pipe group; a circulating air duct assembly having an air outlet, an air outlet pipe and an air inlet pipe, wherein the circulating air duct assembly is connected to the air inlet of the first heat exchange device through the air outlet pipe, and the circulating air duct assembly is connected to the air outlet of the second heat exchange device through the air inlet pipe, and a damper is installed in the air outlet, and the damper is used to open or close the air outlet; and The oven has an air inlet and an air outlet, the air inlet of the oven is connected to the air outlet of the first heat exchange device, the air outlet of the oven is connected to the air inlet of the second heat exchange device, and the oven is used to dry the ink of the printed matter.

2. The ink drying system for a printing press according to claim 1, characterized in that: The first heat exchange device includes a water-gas heat exchanger and an electric heat exchanger. The chiller, the water-gas heat exchanger and the electric heat exchanger are circulated and connected through the hot water pipe group. The circulating air duct assembly, the air outlet pipe, the water-gas heat exchanger, the electric heat exchanger and the air inlet of the oven are gas-connected in sequence.

3. The ink drying system for a printing press according to claim 1, characterized in that: The second heat exchange device includes a condensing dehumidifier and a heat exchanger. The chiller, the condensing dehumidifier and the heat exchanger are circulated and connected through the cold water pipe group. The air outlet of the oven, the heat exchanger, the condensing dehumidifier, the air inlet pipe and the circulating air duct assembly are connected in sequence.

4. The ink drying system for a printing press according to claim 1, characterized in that: It comprises a hot water regulating valve and a cold water regulating valve. The hot water regulating valve is installed on the hot water pipe group, and the cold water regulating valve is installed on the cold water pipe group.

5. The ink drying system for a printing press according to claim 1, characterized in that: The first heat exchange device, the second heat exchange device and the oven are each provided in plurality, and the plurality of the first heat exchange devices, the plurality of the second heat exchange devices and the plurality of the ovens are arranged in one-to-one correspondence.

6. The ink drying system for a printing press according to claim 1, characterized in that: The circulating air duct assembly includes a circulating air duct, a connecting air duct and a circulating fan. The circulating fan is in circulation communication with the circulating air duct through the connecting air duct. The exhaust port is arranged in the connecting air duct. The air outlet pipe and the air inlet pipe are installed in the circulating air duct.

7. The ink drying system for a printing press according to claim 6, characterized in that: A gas concentration detector is included, which is installed in the circulating air duct and is used to detect the gas concentration inside the circulating air duct.

8. The ink drying system for a printing press according to claim 6, characterized in that: The circulating air duct is provided with a negative pressure automatic air inlet and a positive pressure automatic air outlet.

9. The ink drying system for a printing press according to claim 1, characterized in that: It comprises a first fan, and the air outlet of the first heat exchange device is connected with the air inlet of the oven through the first fan.

10. The ink drying system for a printing press according to claim 1, characterized in that: A second fan is included, and the air outlet of the second heat exchange device is connected to the air inlet pipe through the second fan.

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