Recycling system of multicolor photogravure press

Abstract

The invention belongs to the technical field of photogravure printing machines, and provides a recovery system of a multicolor photogravure printing machine, which comprises a color cell oven and a storage tank, the color cell oven is provided with an air inlet pipe and an air outlet pipe, the air inlet pipe is provided with a hot air conveying mechanism, the recovery system further comprises a heat exchange pipe and a condensation pipe, and the heat exchange pipe is provided with a closed end and an open end connected with the condensation pipe. The air outlet pipe communicates with the heat exchange pipe, and an air inducing mechanism is arranged in the condensation pipe. The air inlet pipe is located in the heat exchange pipe. The air inlet pipe of the color cell drying oven is arranged in the heat exchange pipe, and the air outlet pipe of the color cell drying oven is communicated with the heat exchange pipe, so that exhausted air can be cooled, the difficulty of subsequently recovering liquid alcohol is reduced, a heat value can be transferred to hot air in the air inlet pipe, and waste heat is fully utilized.

Description

Technical Field

[0001] The invention belongs to the technical field of gravure printing machines, in particular to a recycling system of a multi-color gravure printing machine. Background Art

[0002] The main feature of the gravure printing press is that the image and text on the plate are concave, while the blank part is convex, which is exactly the opposite of the plate structure of the letterpress printing press. When the machine prints a single color, the plate is first immersed in the ink tank and rolled, and the entire surface of the plate is then covered with a layer of ink. Then, the ink layer of the blank part of the plate surface is scraped off, the convex part becomes blank, and the concave part is filled with ink. The deeper the concave part, the thicker the ink layer. The machine transfers the ink in the concave part to the printed matter through pressure, thus obtaining a printed product.

[0003] CN202211010370.4 discloses a water-based ink drying and alcohol recovery system, including an oven, which is divided into area A and area B. Area A is connected to a plate exchanger, which is connected to a first evaporator, which is connected to a hygroscopic component, which contains a polymer hygroscopic material, and the polymer hygroscopic material includes a saturated state and an unsaturated state. The hygroscopic component is connected to a first condenser, which is connected to a fan, and the fan is connected to area A; area B is connected to a second condenser, which is connected to a second electric heater, which is connected to the hygroscopic component, which is connected to the second evaporator, and the second evaporator is connected to the first evaporator.

[0004] In the above technical solution, the air is dehumidified and heated by using the first heater and the second heater. However, in such a working mode, the heat in the air is easily lost when passing through the pipe, and the utilization rate of the residual heat is poor. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned problem and provide a recovery system for a multi-color gravure printing machine. The system can cool the exhausted air and reduce the difficulty of subsequent recovery of liquid alcohol by arranging the air inlet pipe of the color group oven in the heat exchange pipe and connecting the air outlet pipe of the color group oven with the heat exchange pipe, so as to transfer the calorific value to the hot air in the air inlet pipe and make full use of the waste heat.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A recycling system for a multi-color gravure printing machine comprises a color group oven and a storage tank, wherein the color group oven is provided with an air inlet pipe and an air outlet pipe, the air inlet pipe is provided with a hot air conveying mechanism, and further comprises a heat exchange pipe and a condenser pipe, the heat exchange pipe has a closed end and an open end connected to the condenser pipe, the air outlet pipe is connected to the heat exchange pipe, and the condenser pipe is provided with an air induction mechanism;

[0008] The air inlet pipe is located inside the heat exchange pipe, and the heat exchange pipe is used to transfer the heat value of the air exhausted from the color group oven to the air inlet pipe;

[0009] The condenser cools the air exhausted from the color group oven to convert the gaseous alcohol into liquid alcohol and transport it to the storage tank for storage.

[0010] In the above-mentioned recycling system of a multi-color gravure printing machine, the air inlet duct includes an air inlet section, a bending section and a connecting section which are connected in sequence, the air inlet section is connected to the air inlet of the color group oven, the bending section is located in the heat exchange tube, and the connecting section is connected to the output end of the hot air conveying mechanism.

[0011] In the above-mentioned recycling system of a multi-color gravure printing machine, the bending section accounts for 70% to 80% of the length of the air inlet pipe.

[0012] In the above-mentioned recycling system of a multi-color gravure printing machine, the hot air conveying mechanism is a dehumidifier.

[0013] In the above-mentioned recycling system of a multi-color gravure printing machine, the material of the air inlet pipe is stainless steel.

[0014] In the above-mentioned recycling system of a multi-color gravure printing machine, the heat exchange tube is made of PP material.

[0015] In the above-mentioned recovery system of a multi-color gravure printing machine, a plurality of condensation filters are arranged on the condensation pipe.

[0016] The above-mentioned recycling system for a multi-color gravure printing machine also includes a cooling water pool, and one end of the condenser pipe is located in the cooling water pool.

[0017] In the above-mentioned recycling system of a multi-color gravure printing machine, the air-inducing mechanism is an air-inducing fan.

[0018] In the above-mentioned recycling system of a multi-color gravure printing machine, the number of the color group ovens is multiple.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the present invention, the heat exchange tube can accommodate the air inlet pipe, and the air with high calorific value exhausted from the color group oven is used to transfer the calorific value to the air inlet pipe with lower calorific value. In this way, the exhausted air can be cooled, reducing the difficulty of subsequent recovery of liquid alcohol, and the calorific value can be transferred to the hot air in the air inlet pipe, making full use of the waste heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a recycling system of a multi-color gravure printing machine in Example 1;

[0022] Among them, the reference numerals of each figure are:

[0023] 1. Color group oven; 11. Air inlet pipe; 111. Air inlet section; 112. Bending section; 113. Connecting section; 12. Air outlet pipe; 2. Hot air conveying mechanism; 3. Heat exchange pipe; 31. Closed end; 32. Open end; 4. Condenser pipe; 41. Condensation filter; 5. Storage tank; 6. Cooling pool; 7. Air induction mechanism. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1

[0026] refer to Figure 1 A recycling system for a multi-color gravure printing machine includes a color group oven 1 and a storage tank 5. The color group oven 1 is provided with an air inlet pipe 11 and an air outlet pipe 12. The air inlet pipe 11 is provided with a hot air conveying mechanism 2. The color group oven 1 also includes a heat exchange pipe 3 and a condenser pipe 4. The heat exchange pipe 3 has a closed end 31 and an open end 32 connected to the condenser pipe 4. The air outlet pipe 12 is connected to the heat exchange pipe 3. The condenser pipe 4 is provided with an air induction mechanism 7.

[0027] The air inlet pipe 11 is located inside the heat exchange pipe 3, and the heat exchange pipe 3 is used to transfer the heat value of the air exhausted from the color group oven 1 to the air inlet pipe 11;

[0028] The condenser 4 cools down the air exhausted from the color group oven 1 to convert the gaseous alcohol into liquid alcohol, and transports the liquid alcohol to the storage tank 5 for storage.

[0029] Under this design, the hot air conveying mechanism 2 provides a hot air source to the color group oven 1, and the hot air enters the color group oven 1 after passing through the air inlet pipe 11. At the same time, the color group oven 1 will heat and heat the incoming hot air, and the color group oven 1 will exhaust the air. Under the action of the air induced mechanism 7, the exhausted air enters the heat exchange tube 3 after passing through the air outlet pipe 12. Since the air inlet pipe 11 is located in the heat exchange tube 3, the heat of the exhausted air will be transferred to the air inlet pipe 11, and then to the hot air in the air inlet pipe 11. After that, the air after heat exchange in the heat exchange tube 3 will enter the condenser 4 for cooling, so that the gaseous alcohol is converted into liquid alcohol and the liquid alcohol is transported to the storage tank 5 for storage. In this way, the exhausted air can be cooled, reducing the difficulty of subsequent recovery of liquid alcohol, and the calorific value can be transferred to the hot air in the air inlet pipe 11, so as to make full use of the waste heat.

[0030] The color group oven 1 has been disclosed in Chinese patent CN203713239U, so the structure of the color group oven 1 will not be described in detail in this embodiment.

[0031] Preferably, the air inlet pipe 11 includes an air inlet section 111, a bending section 112 and a connecting section 113 which are connected in sequence, the air inlet section 111 is connected to the air inlet of the color group oven 1, the bending section 112 is located in the heat exchange tube 3, and the connecting section 113 is connected to the output end of the hot air conveying mechanism 2;

[0032] The bending section 112 accounts for 70% to 80% of the length of the air inlet pipe 11 .

[0033] Specifically, the hot air is generated by the hot air conveying mechanism 2, and the hot air enters the color group oven 1 after passing through the connecting section 113, the bending section 112 and the air inlet section 111 in sequence, and the bending section 112 is arranged in the heat exchange tube 3, so that the hot air can prolong the flow time in the heat exchange tube 3, so that the hot air can have sufficient time to exchange heat in the heat exchange tube 3, thereby ensuring sufficient transfer of calorific value.

[0034] More preferably, the hot air conveying mechanism 2 is a dehumidifier. The dehumidifier is used to generate hot air and also to reduce the moisture in the hot air.

[0035] In this embodiment, the air inlet pipe 11 is made of stainless steel. The stainless steel air inlet pipe 11 has strong thermal conductivity, and the air with high calorific value exhausted from the color group oven 1 can better transfer the calorific value to the hot air in the air inlet pipe 11.

[0036] In practical applications, the heat exchange tube 3 is made of PP material. The heat exchange tube 3 made of PP material has good thermal insulation effect and can reduce the heat loss during the heat exchange process.

[0037] Preferably, a plurality of condensation filters 41 are provided on the condensation pipe 4. The condensation filters 41 can be made of steel wire mesh. Under the action of the air induction mechanism 7, after the air with high calorific value discharged from the color group oven 1 encounters the steel wire mesh, the air is cooled and liquefied due to the low temperature of the condensation filters 41, thereby converting the gaseous alcohol into liquid alcohol, and the liquid alcohol is stored in the storage tank 5.

[0038] More preferably, a cooling water pool 6 is further included, and one end of the condenser tube 4 is located in the cooling water pool 6. By arranging one end of the condenser tube 4 in the cooling water pool 6, the air can be further cooled.

[0039] Implicitly, the condenser tube 4 can be made of stainless steel, and the cooling water pool 6 can better cool the exhausted air.

[0040] Preferably, the air induction mechanism 7 is an induced draft fan, which is used to guide the air exhausted from the color group oven 1 to flow.

[0041] In this embodiment, there are multiple color group ovens 1. Multiple color group ovens 1 are provided, and the air outlet pipe 12 of each color group oven 1 is connected to the heat exchange pipe 3, and the air inlet pipe 11 is arranged in the heat exchange pipe 3, so that the hot air in the air inlet pipes 11 of the multiple color group ovens 1 can be heat exchanged at the same time.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements or modifications without departing from the principle of the present invention. These improvements or modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A recycling system for a multi-color gravure printing machine, comprising a color group oven and a storage tank, wherein the color group oven is provided with an air inlet pipe and an air outlet pipe, and the air inlet pipe is provided with a hot air conveying mechanism, characterized in that: It also includes a heat exchange tube and a condenser tube, wherein the heat exchange tube has a closed end and an open end connected to the condenser tube, the air outlet pipe is connected to the heat exchange tube, and an air induction mechanism is provided in the condenser tube; The air inlet pipe is located inside the heat exchange pipe, and the heat exchange pipe is used to transfer the heat value of the air exhausted from the color group oven to the air inlet pipe; The condenser cools the air exhausted from the color group oven to convert the gaseous alcohol into liquid alcohol, and transports the liquid alcohol to the storage tank for storage.

2. The recycling system of a multi-color gravure printing machine according to claim 1, characterized in that: The air inlet pipe includes an air inlet section, a bending section and a connecting section which are connected in sequence. The air inlet section is connected to the air inlet of the color group oven. The bending section is located in the heat exchange tube. The connecting section is connected to the output end of the hot air conveying mechanism.

3. The recycling system of a multi-color gravure printing machine according to claim 2, characterized in that: The bending section accounts for 70% to 80% of the length of the air inlet pipe.

4. The recycling system of a multi-color gravure printing machine according to claim 1, characterized in that: The hot air conveying mechanism is a dehumidifier.

5. The recycling system of a multi-color gravure printing machine according to claim 1, characterized in that: The material of the air inlet pipe is stainless steel.

6. The recycling system of a multi-color gravure printing machine according to claim 1, characterized in that: The heat exchange tube is made of PP material.

7. The recycling system of a multi-color gravure printing machine according to claim 1, characterized in that: A plurality of condensation filters are arranged on the condensation tube.

8. The recycling system of a multi-color gravure printing machine according to claim 1, characterized in that: It also includes a cooling water pool, and one end of the condenser is located in the cooling water pool.

9. The recycling system of a multi-color gravure printing machine according to claim 1, characterized in that: The air induced mechanism is an induced draft fan.

10. The recycling system of a multi-color gravure printing machine according to claim 1, characterized in that: The number of the color group ovens is multiple.

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