Quenching oil tank waste heat utilization system

Abstract

The utility model belongs to the technical field of waste heat recovery, relates to a quenching oil tank waste heat utilization system, including quenching oil tank, a plurality of plate heat exchangers connected with quenching oil tank and a plurality of cleaning machines corresponding connected with a plurality of plate heat exchangers, and the first import and the first export of plate heat exchanger are connected the oil outlet and the oil return of quenching oil tank respectively, and the second import and the second export of plate heat exchanger are connected the water outlet and the water return of cleaning machine respectively, the utility model has the advantages of simple structure, stable and reliable, reduces the consumption of cleaning machine cold water heating electricity fee, avoids the waste of the large amount of heat generated by quenching oil tank, saves the cost of specially purchasing cooling equipment to cool quenching oil tank, reaches the purpose of energy reuse, cost reduction and benefit increase.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat recovery technology, specifically relating to a waste heat utilization system for quenching oil tanks. Background Technology

[0002] In recent years, energy conservation and environmental protection have become an inevitable trend, and energy conservation, emission reduction, and the circular economy have become the inevitable choices for industry development. Against this backdrop, waste heat recovery and reuse technology has gradually emerged. Combining production processes and characteristics, a series of technical means are used to recover and reuse waste heat generated during production, broadening energy utilization channels, reducing energy costs, thereby improving competitiveness and promoting sustainable development.

[0003] As is well known, the oil bath generates a lot of heat when the workpiece is quenched, which causes the temperature of the quenching oil to rise. At this time, the quenching oil needs to be cooled to the required process temperature in order to meet the continuous operation of production. Meanwhile, the cleaning equipment of the production line needs to heat the water to ensure the cleaning effect. Therefore, it is necessary to design a circulation system that can recover the temperature of the quenching oil bath for the cleaning equipment. Utility Model Content

[0004] The purpose of this invention is to address the defects and shortcomings of existing technologies by designing a simple, stable, and reliable waste heat utilization system for quenching oil tanks that achieves energy reuse, cost reduction, and efficiency improvement.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a quenching oil tank waste heat utilization system, including a quenching oil tank, multiple plate heat exchangers connected to the quenching oil tank, and multiple cleaning machines correspondingly connected to the multiple plate heat exchangers. The first inlet and the first outlet of the plate heat exchangers are respectively connected to the oil outlet and the oil return port of the quenching oil tank, and the second inlet and the second outlet of the plate heat exchangers are respectively connected to the water outlet and the water return port of the cleaning machines.

[0006] Preferably, two plate heat exchangers are provided, namely a first plate heat exchanger and a second plate heat exchanger.

[0007] Preferably, two cleaning machines are provided: a first cleaning machine connected to a first plate heat exchanger and a second cleaning machine connected to a second plate heat exchanger. The first cleaning machine and the second cleaning machine are respectively provided with a spray chamber and a soaking chamber.

[0008] Preferably, the first inlet of the plate heat exchanger is connected to the oil outlet of the quenching oil tank via an oil outlet pipe, and an oil outlet pump and a first normally open valve are installed on the oil outlet pipe.

[0009] Preferably, the first outlet of the plate heat exchanger is connected to the return port of the quenching oil tank via a return oil pipeline, and a second normally open valve is provided on the return oil pipeline.

[0010] Preferably, the outlet of the cleaning machine is connected to an air vent pump, and the air vent pump is connected to the second inlet of the plate heat exchanger through a bypass pipeline.

[0011] After adopting the above technical solution, the quenching oil tank waste heat utilization system provided by this utility model has the following beneficial effects:

[0012] This invention utilizes a plate heat exchanger design to exchange heat between the high-temperature oil in the quenching oil tank and the cold water in the cleaning machine. This not only cools the high-temperature oil in the quenching oil tank but also heats the cold water in the cleaning machine, reducing electricity consumption for heating the cold water in the cleaning machine and avoiding the waste of the large amount of heat generated by the quenching oil tank. It also eliminates the need to purchase separate cooling equipment to cool the quenching oil tank. Therefore, this invention has a simple structure, is stable and reliable, and achieves the goals of energy reuse, cost reduction, and efficiency improvement. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a quenching oil tank waste heat utilization system according to the present invention.

[0014] The components include: 1. Quenching oil tank; 2. First inlet; 3. First outlet; 4. Oil outlet; 5. Oil return outlet; 6. Second inlet; 7. Second outlet; 8. Water outlet; 9. Water return outlet; 10. First plate heat exchanger; 11. Second plate heat exchanger; 12. First cleaning machine; 13. Second cleaning machine; 14. Spray chamber; 15. Immersion chamber; 16. Oil outlet pipe; 17. Oil outlet pump; 18. First normally open valve; 19. Oil return pipe; 20. Second normally open valve; 21. Drain pump; 22. Bypass pipe. Detailed Implementation

[0015] The present invention will now be described in further clear and complete detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0017] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0018] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0019] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0020] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0021] This utility model discloses a waste heat utilization system for quenching oil tanks, such as... Figure 1 As shown, it includes a quenching oil tank 1, multiple plate heat exchangers connected to the quenching oil tank 1, and multiple cleaning machines connected to the multiple plate heat exchangers respectively. Specifically, there are two plate heat exchangers, namely a first plate heat exchanger 10 and a second plate heat exchanger 11. There are also two cleaning machines, namely a first cleaning machine 12 connected to the first plate heat exchanger 10 and a second cleaning machine 13 connected to the second plate heat exchanger 11. The first cleaning machine 12 and the second cleaning machine 13 are respectively provided with a spray chamber 14 and a soaking chamber 15.

[0022] The first inlet 2 and the first outlet 3 of the plate heat exchanger are respectively connected to the oil outlet 4 and the oil return port 5 of the quenching oil tank 1. Specifically, the first inlet 2 of the plate heat exchanger and the oil outlet 4 of the quenching oil tank 1 are connected by an oil outlet pipe 16. An oil outlet pump 17 and a first normally open valve 18 are installed on the oil outlet pipe 16. That is, the high-temperature oil that rapidly heats up after quenching in the quenching oil tank 1 enters the first inlet 2 of the first plate heat exchanger 10 and the second plate heat exchanger 11 through the oil outlet pipe 16 under the action of the oil outlet pump 17. The first outlet 3 of the plate heat exchanger and the oil return port 5 of the quenching oil tank 1 are connected by a return pipe 19. A second normally open valve 20 is installed on the return pipe 19. That is, the low-temperature oil after heat exchange in the first plate heat exchanger 10 and the second plate heat exchanger 11 returns to the quenching oil tank 1 through the return pipe 19.

[0023] The second inlet 6 and the second outlet 7 of the plate heat exchanger are respectively connected to the outlet 8 and the return outlet 9 of the cleaning machine. Specifically, the outlet 8 of the cleaning machine is connected to the vent pump 21, and the vent pump 21 is connected to the second inlet 6 of the plate heat exchanger through the bypass pipe 22. That is, the first vent pump and the second vent pump are respectively installed at the outlet 8 of the first cleaning machine 12 and the second cleaning machine 13. The first vent pump and the second vent pump respectively send the cold water of the first cleaning machine 12 and the second cleaning machine 13 into the first plate heat exchanger 10 and the second plate heat exchanger 11 to exchange heat with the high temperature oil. The heated hot water returns to the cleaning machine through the second outlet 7 of the plate heat exchanger and the return outlet 9 of the cleaning machine.

[0024] When using the waste heat utilization system of the quenching oil tank of this utility model, the heated workpiece is rapidly descended from the upper chamber to the lower chamber of the quenching oil tank 1, generating a large amount of heat and causing the oil temperature in the quenching oil tank 1 to rise rapidly. At this time, the oil pump 17 is turned on to quickly pump the hot oil to the plate heat exchangers of the two cleaning machines. At the same time, the cold water in the cleaning machine is pumped into the plate heat exchanger through the vent pump 21. Through heat exchange between the hot oil and the cold water, not only is the hot oil cooled, but the cold water in the cleaning machine is also heated. After the hot oil is cooled, it returns to the quenching oil tank 1, and after the cold water is heated, it returns to the cleaning machine, thereby achieving the purpose of energy reuse, cost reduction and efficiency improvement.

[0025] It should be noted that, due to the large amount of heat generated during workpiece quenching, this circulation system can be kept running continuously during normal equipment operation, and then stopped when the oil temperature reaches the preset standard value.

[0026] In summary, the quenching oil tank waste heat utilization system provided by this utility model reduces the electricity consumption for heating cold water in the cleaning machine, avoids the waste of a large amount of heat generated by the quenching oil tank, and saves the cost of specially purchasing cooling equipment to cool the quenching oil tank. It has great market value and is worthy of widespread promotion and application.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A system for utilizing waste heat from a quenching oil tank, characterized in that: It includes a quenching oil tank (1), multiple plate heat exchangers connected to the quenching oil tank (1), and multiple cleaning machines connected to the multiple plate heat exchangers respectively. The first inlet (2) and the first outlet (3) of the plate heat exchangers are respectively connected to the oil outlet (4) and the oil return outlet (5) of the quenching oil tank (1). The second inlet (6) and the second outlet (7) of the plate heat exchangers are respectively connected to the water outlet (8) and the water return outlet (9) of the cleaning machines.

2. The quenching oil tank waste heat utilization system according to claim 1, characterized in that: Two plate heat exchangers are provided, namely a first plate heat exchanger (10) and a second plate heat exchanger (11).

3. The quenching oil tank waste heat utilization system according to claim 2, characterized in that: Two cleaning machines are provided, namely a first cleaning machine (12) connected to the first plate heat exchanger (10) and a second cleaning machine (13) connected to the second plate heat exchanger (11). The first cleaning machine (12) and the second cleaning machine (13) are respectively provided with a spray chamber (14) and a soaking chamber (15).

4. The quenching oil tank waste heat utilization system according to claim 1, characterized in that: The first inlet (2) of the plate heat exchanger is connected to the oil outlet (4) of the quenching oil tank (1) through an oil outlet pipe (16), and an oil outlet pump (17) and a first normally open valve (18) are provided on the oil outlet pipe (16).

5. The quenching oil tank waste heat utilization system according to claim 1, characterized in that: The first outlet (3) of the plate heat exchanger is connected to the oil return port (5) of the quenching oil tank (1) through an oil return pipe (19), and a second normally open valve (20) is provided on the oil return pipe (19).

6. The quenching oil tank waste heat utilization system according to claim 1, characterized in that: The outlet (8) of the cleaning machine is connected to the vent pump (21), and the vent pump (21) is connected to the second inlet (6) of the plate heat exchanger through the bypass pipe (22).

Images