A coating oven waste heat utilization device

Abstract

The utility model relates to coating machine oven waste heat utilization technical field especially relates to a kind of coating machine oven waste heat utilization device, including waste heat utilization unit, waste heat distribution unit and coating machine, the heat exchanger of waste heat utilization unit is communicated with the oven of coating machine, heat exchanger is communicated with waste heat distribution unit, the first waste heat distribution pipe of waste heat distribution unit is communicated with coating machine feed inlet, the second waste heat distribution pipe of waste heat distribution unit is communicated with coating machine discharge port.The utility model uses the above structure of a kind of coating machine oven waste heat utilization device, by waste heat recovery-heat exchange-directional distribution closed loop design, realize the energy saving and process optimization of coating machine oven.

Description

Technical Field

[0001] This utility model relates to the field of waste heat utilization technology of coating machine ovens, and in particular to a waste heat utilization device for coating machine ovens. Background Technology

[0002] In the coating industry, coating machine ovens generate a large amount of high-temperature waste heat during operation. Traditional processes typically discharge this waste heat directly to the outside, leading to energy waste and environmental thermal pollution. Existing waste heat recovery systems suffer from the following problems: Low heat utilization rate: Waste heat is only used in a single stage (such as preheating some materials), failing to form a systematic heat recycling system; Dispersed layout: Waste heat recovery devices are separated from the main body of the coating machine, resulting in complex piping connections and significant heat loss; Limited functionality: It is impossible to simultaneously control the temperature of the coating machine's inlet and outlet, making it difficult to meet the heat requirements for material pretreatment and cooling in the coating process; Insufficient insulation performance: Traditional pipelines lack insulation, leading to significant heat loss during transmission and further reducing recovery efficiency.

[0003] Therefore, there is an urgent need for a waste heat utilization device that is compact, has high thermal efficiency, and can cover multiple stages, in order to solve the problems of energy waste, unreasonable layout, and single function in the existing technology. Utility Model Content

[0004] The purpose of this invention is to provide a waste heat utilization device for coating machine ovens. This invention achieves energy saving and process optimization of coating machine ovens and improves waste heat utilization efficiency through a systematic closed-loop design of waste heat recovery, heat exchange and directional distribution.

[0005] To achieve the above objectives, this utility model provides a waste heat utilization device for a coating machine oven, comprising a waste heat utilization unit, a waste heat distribution unit, and a coating machine. The oven of the coating machine is connected to the heat exchanger of the waste heat utilization unit. The heat exchange outlet of the heat exchanger is connected to the waste heat distribution unit through a heat exchange tee. The first waste heat distribution pipe of the waste heat distribution unit is connected to the feed inlet of the coating machine, and the second waste heat distribution pipe of the waste heat distribution unit is connected to the discharge outlet of the coating machine. Both the first and second waste heat distribution pipes are connected to the heat exchange tee.

[0006] Preferably, the waste heat utilization unit includes a mounting frame, a waste heat inlet pipe, and a heat exchanger. One end of the waste heat inlet pipe is connected to a waste heat fan at the outlet of the oven, and the other end is connected to the waste gas inlet of the heat exchanger. The heat exchanger's heat exchange inlet is connected to an air fan.

[0007] Preferably, the end of the first waste heat distribution pipe of the waste heat distribution unit that is away from the heat exchange tee is connected to the feed port of the coating machine, and the end of the second waste heat distribution pipe that is away from the heat exchange tee is connected to the discharge port of the coating machine.

[0008] Preferably, the exhaust gas outlet of the heat exchanger is connected to the exhaust gas pipe, and the mounting bracket of the heat exchanger is located on one side of the coating machine.

[0009] Preferably, the exhaust pipe, the first waste heat distribution pipe, and the second waste heat distribution pipe are all wrapped with an insulation layer.

[0010] Preferably, the exhaust pipe, the first waste heat distribution pipe, and the second waste heat distribution pipe are all located at the top of the coating machine.

[0011] Therefore, the waste heat utilization device for a coating machine oven with the above-described structure has the following advantages:

[0012] 1. This utility model achieves energy saving and process optimization of coating machine ovens through a systematic closed-loop design of waste heat recovery-heat exchange-directional distribution, thereby improving waste heat utilization efficiency;

[0013] 2. Compared with the traditional direct emission process, the device provided by this utility model increases the heat recovery rate by about 30%-50%, reduces the energy consumption of the coating machine oven, and achieves an energy saving rate of 20-40%.

[0014] 3. This utility model optimizes the coating process of the coating machine through bidirectional temperature control, preheats the feed inlet of the coating machine to reduce drying time, heats and insulates the discharge outlet of the coating machine to avoid thermal stress, and the uniform temperature distribution reduces coating defects and improves product quality.

[0015] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a waste heat utilization device for a coating machine oven according to the present invention;

[0017] Figure 2 This is a top view of a waste heat utilization device for a coating machine oven according to this utility model.

[0018] Figure label:

[0019] 1. Coating machine; 11. Coating machine inlet; 12. Coating machine outlet; 13. Waste heat blower; 2. Heat exchanger; 3. Waste heat distribution unit; 31. First waste heat distribution pipe; 32. Second waste heat distribution pipe; 33. Heat exchange tee; 4. Air blower; 5. Mounting bracket; 6. Exhaust gas pipe. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. Unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The features mentioned above or in the specific examples mentioned in this invention can be combined arbitrarily, and these specific embodiments are only used to illustrate this invention and are not intended to limit the scope of this invention.

[0021] Example 1

[0022] like Figure 1 and Figure 2 As shown, this utility model provides a waste heat utilization device for a coating machine oven, including a waste heat utilization unit, a waste heat distribution unit 3, and a coating machine 1. The oven of the coating machine 1 is connected to the heat exchanger 2 of the waste heat utilization unit, and the heat exchanger 2 is connected to the waste heat distribution unit 3. The first waste heat distribution pipe 31 of the waste heat distribution unit 3 is connected to the feed inlet 11 of the coating machine, and the second waste heat distribution pipe 32 of the waste heat distribution unit 3 is connected to the discharge outlet 12 of the coating machine.

[0023] During the operation of the coating machine 1 oven, the hot exhaust gas generated is recycled through heat exchanger 2, and the preheated air is reintroduced into the coating machine 1, forming a thermal circulation process. This invention directly utilizes waste heat to preheat the coating machine inlet 11 and outlet 12, reducing the energy consumption required for heating the coating machine 1 oven, balancing the temperature distribution inside the coating machine 1, and avoiding coating quality problems caused by localized temperature differences.

[0024] The waste heat utilization unit includes a mounting frame 5, a waste heat inlet pipe and a heat exchanger 2. One end of the waste heat inlet pipe is connected to the waste heat fan 13 at the outlet of the oven, and the other end is connected to the waste gas inlet of the heat exchanger 2. The heat exchange outlet of the heat exchanger 2 is connected to the heat exchange tee 33.

[0025] Waste heat blower 13 sends hot waste gas from the oven into heat exchanger 2, where it exchanges heat with fresh air. The waste gas and fresh air flow in opposite directions to maximize the temperature difference and improve heat exchange efficiency. The resulting preheated air then enters the waste heat distribution unit. The heat exchange tee 33 allows for flexible adjustment of the preheated air ratio between the coating machine inlet 11 and outlet 12, adapting to different process requirements and enhancing equipment versatility.

[0026] The first waste heat distribution pipe 31 and the second waste heat distribution pipe 32 of the waste heat distribution unit are both connected to the heat exchange tee 33. The end of the first waste heat distribution pipe 31 away from the heat exchange tee 33 is connected to the feed inlet 11 of the coating machine, and the end of the second waste heat distribution pipe 32 away from the heat exchange tee 33 is connected to the discharge outlet 12 of the coating machine.

[0027] The first waste heat distribution pipe 31 supplies preheated air to the feed inlet 11 of the coating machine to preheat the cold material, reduce the temperature difference between the material and the drying oven of the coating machine 1, and reduce energy consumption in the initial stage of drying. The second waste heat distribution pipe 32 supplies preheated air to the discharge outlet 12 of the coating machine to maintain the temperature of the discharge area, uniformly cool down to reduce stress concentration, and prevent the product from shrinking and deforming due to excessive cooling.

[0028] The exhaust gas outlet of heat exchanger 2 is connected to exhaust gas pipe 6, and the mounting bracket 5 of heat exchanger 2 is located on one side of coating machine 1. Exhaust gas pipe 6, the first waste heat distribution pipe 31, and the second waste heat distribution pipe 32 are all arranged at the top of coating machine 1, shortening the pipe length and, in conjunction with the insulation layer, reducing heat loss during transmission. The exhaust gas after heat exchange is discharged through exhaust gas pipe 6. The location of the mounting bracket 5 facilitates individual maintenance of heat exchanger 2.

[0029] The exhaust pipe 6, the first waste heat distribution pipe 31, and the second waste heat distribution pipe 32 are all wrapped with an insulation layer. The insulation layer further reduces the environmental heat exchange loss, reduces the heat loss of the exhaust pipe 6, the first waste heat distribution pipe 31, and the second waste heat distribution pipe 32, and ensures that the preheated air is delivered to the target location at a higher temperature, thereby improving the actual effective heat utilization rate.

[0030] The exhaust pipe 6, the first waste heat distribution pipe 31, and the second waste heat distribution pipe 32 are all located at the top of the coating machine 1, utilizing the natural rising characteristics of hot air, while avoiding occupying ground space and facilitating maintenance.

[0031] Example 2

[0032] A method for using a waste heat recovery device for a coating machine oven, using the waste heat recovery device for a coating machine oven in Example 1, includes the following steps:

[0033] S1. Start the drying oven of coating machine 1 to dry the product entering through the feed inlet 11 of the coating machine.

[0034] S2. Start the waste heat blower 13 to send the waste heat air from the coating machine 1 into the heat exchanger 2. After heat exchange, the waste gas enters the waste gas pipe 6 through the waste gas outlet. The waste heat blower 13 actively extracts the waste gas to ensure that the waste heat utilization device and the drying oven of the coating machine 1 operate synchronously.

[0035] S3. Air blower 4 delivers fresh air into heat exchanger 2. Heat exchanger 2 uses the heat from waste hot air to heat the fresh air. The preheated air then enters heat exchange tee 33. The flow rate and temperature of the preheated air are controlled by adjusting the speed of air blower 4.

[0036] By linking and controlling the waste heat fan 13 and the air fan 4, the automated operation of waste heat recovery and preheated air supply is realized, reducing manual intervention.

[0037] S4, the heat exchange tee 33 directs preheated air into the coating machine inlet 11 and the coating machine outlet 12 via the first waste heat distribution pipe 31 and the second waste heat distribution pipe 32, respectively.

[0038] Therefore, this utility model is a waste heat utilization device for a coating machine oven with the above-mentioned structure. Through a systematic closed-loop design of waste heat recovery-heat exchange-directional distribution, this utility model achieves energy saving and process optimization of the coating machine oven and improves waste heat utilization efficiency.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A coater oven waste heat utilization device, characterized by: It includes a waste heat utilization unit, a waste heat distribution unit, and a coating machine. The oven of the coating machine is connected to the heat exchanger of the waste heat utilization unit. The heat exchange outlet of the heat exchanger is connected to the waste heat distribution unit through a heat exchange tee. The first waste heat distribution pipe of the waste heat distribution unit is connected to the feed inlet of the coating machine, and the second waste heat distribution pipe of the waste heat distribution unit is connected to the discharge outlet of the coating machine. Both the first and second waste heat distribution pipes are connected to the heat exchange tee.

2. The coating oven waste heat utilization device according to claim 1, characterized in that: The waste heat utilization unit includes a mounting frame, a waste heat inlet pipe, and a heat exchanger. One end of the waste heat inlet pipe is connected to the waste heat fan at the outlet of the oven, and the other end is connected to the waste gas inlet of the heat exchanger. The heat exchanger's heat exchange inlet is connected to the air fan.

3. The coating oven waste heat utilization device according to claim 1, characterized in that: The end of the first waste heat distribution pipe of the waste heat distribution unit that is away from the heat exchange tee is connected to the feed port of the coating machine, and the end of the second waste heat distribution pipe that is away from the heat exchange tee is connected to the discharge port of the coating machine.

4. The coating oven waste heat utilization device according to claim 1, characterized in that: The exhaust outlet of the heat exchanger is connected to the exhaust pipe, and the mounting bracket of the heat exchanger is located on one side of the coating machine.

5. The coating oven waste heat utilization device according to claim 4, characterized in that: The exhaust pipe, the first waste heat distribution pipe, and the second waste heat distribution pipe are all wrapped with an insulation layer.

6. The coating oven waste heat utilization device according to claim 4, characterized in that: The exhaust pipe, the first waste heat distribution pipe, and the second waste heat distribution pipe are all located at the top of the coating machine.

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