Heat treatment equipment for quenching oil and gas reburning water purification

Abstract

The embodiment of the present invention relates to the technical field of quenching oil and gas treatment, and specifically to a heat treatment device for quenching oil and gas reburning water purification, which includes a heating furnace, a quenching oil tank, a cleaning device and a tempering furnace arranged in sequence along the flow direction of the workpiece, and also includes a quenching oil fume reflux device, the heating furnace heats the workpiece, the quenching oil tank completes quenching to change the metallographic structure and mechanical properties of the workpiece, the quenching oil fume reflux device guides the oil and gas generated during quenching to the heating furnace for repeated combustion, the cleaning device thoroughly cleans the quenching oil on the surface of the workpiece, and the tempering furnace completes tempering to remove the stress of the workpiece. The beneficial effects of the embodiment of the present invention are: saving the energy consumption of the heating furnace, and at the same time, some harmful substances in the quenching oil and gas are burned and decomposed in the furnace; under the action of the water purification device, a small amount of quenching oil and gas escaping from the quenching area is filtered and cooled by water before being discharged, and the pollutants are trapped in the water, thereby further meeting the environmental protection needs.

Description

Technical Field

[0001] The invention relates to the technical field of equipment using quenching oil for quenching treatment, and in particular to a heat treatment equipment for quenching oil gas reburning water purification. Background Art

[0002] Heat treatment equipment usually uses a heating furnace, which uses energy such as natural gas to generate high temperatures to heat various parts. One of its usage scenarios is the quenching of bearing rollers. The bearing rollers are first heated using an electric heating furnace, and then transported to the oil tank (via a conveyor chain or other conveying mechanism installed in the heating furnace). The bearing rollers fall into the quenching oil in the oil tank, which quickly cools down and completes the quenching of the bearing rollers, so that the metallographic structure of the bearing is fully or partially transformed into martensite, thereby increasing its hardness and ultimately ensuring its wear resistance.

[0003] When the high-temperature bearing roller falls into the quenching oil, the quenching oil heats up rapidly and vaporizes, carrying with it impurities such as moisture and dust in the air. If it is discharged directly into the air, it will inevitably cause serious environmental pollution. If the existing complete set of equipment is used for treatment, the cost is high and the structure is complex.

[0004] Therefore, a heat treatment device for quenching oil gas reburning water purification is needed to overcome the above problems. Summary of the invention

[0005] In order to solve the above problems, that is, to solve the problems, an embodiment of the present invention provides a quenching oil gas reburning water purification heat treatment equipment, which includes a heating furnace, a quenching oil tank, a cleaning device and a tempering furnace arranged in sequence along the flow direction of the workpiece, and the quenching oil gas reburning water purification heat treatment equipment also includes a quenching oil fume reflux device, wherein:

[0006] The heating furnace comprises a furnace body, a first workpiece conveying mechanism and a combustion mechanism arranged in the furnace body, wherein the first workpiece conveying mechanism is used to carry the workpiece and convey the workpiece from the inlet of the furnace body to the outlet of the furnace body, and the combustion mechanism is arranged around the first workpiece conveying mechanism;

[0007] The quenching oil tank is arranged below the outlet of the furnace body, and is used to receive the workpieces dropped from the outlet of the furnace body. The quenching oil tank is filled with quenching oil. A second workpiece conveying mechanism is arranged in the quenching oil tank. The workpiece loading end of the second workpiece conveying mechanism is located below the outlet of the furnace body and is immersed in the quenching oil. The top of the quenching oil tank is covered with an oil tank cover.

[0008] The quenching oil fume reflux device includes a reflux pipe and a reflux fan. The first end of the reflux pipe extends through the oil tank cover into the quenching oil tank and is located above the quenching oil. The reflux fan is installed on the reflux pipe and is used to generate negative pressure for the quenching oil gas in the quenching oil tank to flow into the reflux pipe. The second end of the reflux pipe is connected to the furnace of the combustion mechanism.

[0009] Furthermore, the cleaning device includes an ultrasonic cleaning mechanism, which includes an ultrasonic cleaning container, a third workpiece conveying mechanism and an ultrasonic generator, the workpiece conveying end of the second workpiece conveying mechanism is located above or inside the ultrasonic cleaning container, the ultrasonic generator is fixed in the ultrasonic cleaning container, and the third workpiece conveying mechanism is located in the ultrasonic cleaning container.

[0010] Furthermore, the cleaning device also includes a cold water cleaning mechanism located between the ultrasonic cleaning mechanism and the tempering furnace, the cold water cleaning mechanism includes a cold water cleaning container and a fourth workpiece conveying mechanism, the cold water cleaning container is filled with cold water at 4°C-8°C, and the fourth workpiece conveying mechanism is used to transport the water in the cold water cleaning container to the tempering furnace.

[0011] Furthermore, it also includes a water washing device, which includes a water washing pipe, a water washing fan, a water tank and an air outlet pipe, the first end of the water washing pipe is connected to the interior of at least one of the ultrasonic cleaning container and the cold water cleaning container, the second end of the water washing pipe is immersed in the water in the water tank, the water washing fan is installed on the water washing pipe, the first end of the air outlet pipe is connected to the water tank and is located above the water surface, and the second end of the air outlet pipe extends in a direction away from the water tank.

[0012] Furthermore, it also includes a spray device located between the cold water cleaning mechanism and the tempering furnace.

[0013] Furthermore, it also includes condensation louvers, which are vertically arranged and located between the quenching oil tank and the ultrasonic cleaning container, and the height of each blade of the condensation louver gradually decreases in the direction from the quenching oil tank to the ultrasonic cleaning container.

[0014] Furthermore, a baffle is fixed under the oil tank cover, the lower end of the baffle is immersed in quenching oil, and the two side edges of the baffle are respectively fixed to the two inner walls of the quenching oil tank, and the space on the side of the baffle facing the first workpiece conveying mechanism forms an oil and gas enriched area, and the space on the side of the baffle away from the first workpiece conveying mechanism forms a quenching oil and gas free area.

[0015] Furthermore, a pressure fan is installed on the oil tank cover, and the air outlet of the pressure fan is connected to the non-quenching oil and gas area.

[0016] Furthermore, the second workpiece conveying mechanism is a hoist, and a quenching oil dripping fan is fixed above the hoist, and the air outlet of the quenching oil dripping fan is arranged toward the hoist.

[0017] Furthermore, the ultrasonic cleaning device also includes an oil float salvage machine, the feed port of the oil float salvage machine is located below the water level in at least one of the ultrasonic cleaning container and the cold water cleaning container and is arranged close to the water level line, and the oil outlet of the oil float salvage machine extends to the quenching oil tank.

[0018] The beneficial effects of the embodiments of the present invention are:

[0019] The workpiece to be quenched (such as a bearing roller) is first heated by a heating furnace and then enters the quenching tank under the action of the first workpiece conveying mechanism. After being cooled by the quenching oil, the part is transformed into martensite, thereby increasing the hardness and meeting the wear resistance.

[0020] When the high-temperature workpiece enters the quenching oil, the quenching oil undergoes complete and incomplete combustion. The incomplete combustion products are returned to the heating furnace for re-combustion through the drainage of the quenching oil fume reflux device, which effectively utilizes the oil carried in the quenching oil gas and saves the energy consumption of the heating furnace, thereby avoiding the incomplete combustion products from being discharged into the air or requiring treatment with environmental protection equipment. At the same time, some toxic and harmful substances (such as dioxins) in the quenching oil gas are burned and decomposed in the furnace (the final products are only water and carbon dioxide), further reducing pollution to the environment;

[0021] Under the action of the water washing device, the cleaning oil gas (air containing oil and water) escaping from the ultrasonic cleaning container and the cold water cleaning container is filtered and cooled by water before being discharged. The pollutants are trapped in the water, thereby further reducing the pollution to the environment. The cooling effect reduces the greenhouse effect, thereby achieving zero emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of an embodiment of a heat treatment device for quenching oil gas reburning water purification;

[0023] Figure 2 for Figure 1 A partial enlarged view of the middle area Z.

[0024] In the figure:

[0025] 100, heating furnace; 110, furnace body; 120, first workpiece conveying mechanism; 130, combustion mechanism;

[0026] 200, quenching oil tank; 210, above the quenching oil tank; 220, second workpiece conveying mechanism; 230, oil tank cover; 240, baffle; 250, quenching oil and gas enrichment area; 260, quenching oil and gas free area; 270, pressure fan; 280, quenching oil dripping fan;

[0027] 300. Quenching fume reflux device; 310. Reflux duct; 320. Reflux fan;

[0028] 400, cleaning device; 410, ultrasonic cleaning mechanism; 411, ultrasonic cleaning container; 412, third workpiece conveying mechanism; 413, ultrasonic generator; 420, cold water cleaning mechanism; 421, cold water cleaning container; 422, fourth workpiece conveying mechanism; 430, condensation louver;

[0029] 500, water washing device; 510, water washing pipe; 520, water washing fan; 530, water tank; 540, air outlet pipe;

[0030] 610, quenching oil; 620, water for ultrasonic cleaning; 630, cold water; 640, water for washing;

[0031] 700. Tempering furnace. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0033] See also Figure 1 and Figure 2 The embodiment of the present invention discloses a heat treatment device for quenching oil gas reburning water purification, which includes a heating furnace 100, a quenching oil tank 200, a cleaning device 400 and a tempering furnace 700 arranged in sequence along the flow direction of the workpiece, and the heat treatment device for quenching oil gas reburning water purification also includes a quenching oil fume reflux device 300, wherein:

[0034] The heating furnace comprises a furnace body 110 and a first workpiece conveying mechanism 120 and a combustion mechanism 130 arranged in the furnace body (the combustion mechanism may be a resistance furnace, which heats the furnace body to about 850° C., and the quenching oil can be completely and thoroughly burned at this high temperature without any residue), the first workpiece conveying mechanism is used to carry the workpiece and convey the workpiece from the inlet of the furnace body to the outlet of the furnace body, and the combustion mechanism is arranged around the first workpiece conveying mechanism;

[0035] The quenching oil tank is arranged below the outlet of the furnace body, and is used to receive the workpieces dropped from the outlet of the furnace body. The quenching oil tank is filled with quenching oil 610. A second workpiece conveying mechanism is arranged in the quenching oil tank. The workpiece loading end of the second workpiece conveying mechanism 220 is located below the outlet of the furnace body and is immersed in the quenching oil. The upper part 210 of the quenching oil tank is covered with an oil tank cover 230.

[0036] The quenching oil fume reflux device includes a reflux duct 310 and a reflux fan 320. The first end of the reflux duct passes through the oil tank cover and extends into the quenching oil tank and is located above the quenching oil. The reflux fan is installed on the reflux duct and is used to generate negative pressure for the quenching oil gas in the quenching oil tank to flow into the reflux duct. The second end of the reflux duct is connected to the furnace of the combustion mechanism.

[0037] The workpiece to be quenched (such as a bearing roller) is first heated by a heating furnace and then enters the quenching tank under the action of the first workpiece conveying mechanism. After being cooled by the quenching oil, the part is transformed into martensite, thereby increasing the hardness and meeting the wear resistance.

[0038] When the high-temperature workpiece enters the quenching oil, the quenching oil undergoes complete and incomplete combustion. The incomplete combustion products are returned to the heating furnace for re-combustion through the drainage of the quenching oil fume reflux device, which effectively utilizes the oil carried in the quenching oil gas and saves the energy consumption of the heating furnace, thereby avoiding the incomplete combustion products from being discharged into the air or requiring treatment with environmental protection equipment. At the same time, some toxic and harmful substances (such as dioxins, etc.) in the quenching oil gas are burned and decomposed in the furnace, further reducing pollution to the environment;

[0039] Under the action of the water washing device 500, the cleaning oil gas (air containing oil and water) escaping from the ultrasonic cleaning container (which contains ultrasonic cleaning water 620) and the cold water cleaning container is filtered and cooled by water before being discharged, and the pollutants are trapped in the water, thereby further reducing the pollution to the environment. The cooling effect reduces the greenhouse effect, thereby achieving zero emissions.

[0040] In addition, the cleaning device includes an ultrasonic cleaning mechanism 410, which includes an ultrasonic cleaning container 411, a third workpiece conveying mechanism 412 and an ultrasonic generator 413. The workpiece conveying end of the second workpiece conveying mechanism is located above or inside the ultrasonic cleaning container, the ultrasonic generator is fixed in the ultrasonic cleaning container, and the third workpiece conveying mechanism is located in the ultrasonic cleaning container. Ultrasonic cleaning is used to ensure the cleaning effect of the quenching oil attached to the surface of the workpiece.

[0041] It should be noted that the cleaning device also includes a cold water cleaning mechanism 420 located between the ultrasonic cleaning mechanism and the tempering furnace, the cold water cleaning mechanism includes a cold water cleaning container 421 and a fourth workpiece conveying mechanism 422, the cold water cleaning container contains 4°C-8°C cold water 630, and the fourth workpiece conveying mechanism is used to convey the water in the cold water cleaning container to the tempering furnace. The purpose of cold water cleaning is to reduce the participation of austenite, ensure the toughness of the roller, apply to various working conditions, and avoid surface cracks and shedding.

[0042] It should also be noted that the embodiment of the present invention may also include a water washing device, which includes a water washing pipe 510, a water washing fan 520, a water tank 530 (containing water for washing 640) and an air outlet pipe 540. The first end of the water washing pipe is connected to the inside of at least one of the ultrasonic cleaning container and the cold water cleaning container, and the second end of the water washing pipe is immersed in the water in the water tank. The water washing fan is installed on the water washing pipe, and the first end of the air outlet pipe is connected to the inside of the water tank and is located above the water surface. The second end of the air outlet pipe extends in a direction away from the water tank. The oil and gas generated after cleaning is connected to the water in the water tank through a pipe on which the water washing fan is installed, and is discharged after being filtered and cooled by water, with zero pollution and low temperature discharge.

[0043] In addition, the embodiment of the present invention may further include a spray device located between the cold water cleaning mechanism and the tempering furnace. The spray device sprays to complete the final cleaning before the workpiece is tempered. The spray device here can be a nozzle that can spray water.

[0044] The embodiment of the present invention may further include condensation louvers 430, which are vertically arranged and located between the quenching oil tank and the ultrasonic cleaning container, and the height of each blade of the condensation louvers gradually decreases from the quenching oil tank to the ultrasonic cleaning container. The water vaporized by ultrasonic cleaning encounters the louvers and condenses, then flows back to the ultrasonic cleaning container and continues to participate in ultrasonic cleaning, avoiding entering the quenching oil tank and affecting the normal quenching.

[0045] It should be further explained that a baffle 240 is fixed below the oil tank cover, the lower end of the baffle is immersed in quenching oil, and the two side edges of the baffle are respectively fixed to the two inner walls of the quenching oil tank, and the space on the side of the baffle facing the first workpiece conveying mechanism forms an oil and gas enriched area 250, and the space on the side of the baffle away from the first workpiece conveying mechanism forms a quenching oil and gas free area 260.

[0046] A large amount of oil smoke generated at the beginning of quenching is confined in the baffle and cannot enter the back, and is limited to a small local oil and gas enriched area; due to the high temperature and high pressure of the heating furnace, it will not rush forward to the heating furnace, further confined to the narrow oil and gas enriched area; a return fan is installed on the return pipe, and under the action of the negative pressure generated by the return fan, the oil and gas in the oil and gas enriched area return to the heating furnace for re-combustion.

[0047] In addition, a pressure fan 270 is installed on the oil tank cover, and the air outlet of the pressure fan is connected to the non-quenching oil gas area. A pressure fan is installed above the quenching oil tank to form an air curtain, but it is prevented that the quenching oil gas pressure is too high to affect the sealing between the quenching oil tank and the oil tank cover.

[0048] In addition, a specific form of the second workpiece conveying mechanism is a hoist, and a quenching oil dripping fan 280 is fixed above the hoist, and the air outlet of the quenching oil dripping fan is arranged toward the hoist. A fan is installed above the hoist coming out of the quenching oil tank to promote quenching oil dripping and reduce quenching oil attached to the surface of the parts before entering the ultrasonic cleaning.

[0049] It should also be noted that the ultrasonic cleaning device also includes an oil float salvage machine, and the feed port of the oil float salvage machine is located below the water level in at least one of the ultrasonic cleaning container and the cold water cleaning container and is arranged close to the water level line. The oil float salvage machine is used to separate the oil and water in the ultrasonic cleaning water and the cold water, and the separated quenching oil and water can be recycled to save energy. In addition, the oil float salvage machine is a mature technology currently used in the market, such as the invention patent application with patent number "201810886790.6", so the specific model and corresponding structure adopted will not be further described. The oil outlet of the oil float salvage machine extends to the quenching oil tank, so that the separated quenching oil returns to the quenching oil tank for recycling.

[0050] Finally, it should be noted that the above-mentioned first workpiece conveying mechanism can adopt a metal mesh belt driven by a transmission roller, and the second workpiece conveying mechanism, the third workpiece conveying mechanism and the fourth workpiece conveying mechanism must not only realize the horizontal transfer of the workpiece but also realize the lifting of the workpiece. A hoist can be selected. Of course, technical personnel in this field will know that other structures can also be used, which are not listed one by one.

[0051] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0052] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0054] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A heat treatment equipment for quenching oil gas reburning water purification, characterized in that: It includes a heating furnace, a quenching oil tank, a cleaning device and a tempering furnace arranged in sequence along the flow direction of the workpiece, and the quenching oil gas reburning water purification heat treatment equipment also includes a quenching oil fume reflux device, wherein: The heating furnace comprises a furnace body, a first workpiece conveying mechanism and a combustion mechanism arranged in the furnace body, wherein the first workpiece conveying mechanism is used to carry the workpiece and convey the workpiece from the inlet of the furnace body to the outlet of the furnace body, and the combustion mechanism is arranged around the first workpiece conveying mechanism; The quenching oil tank is arranged below the outlet of the furnace body, and is used to receive the workpieces dropped from the outlet of the furnace body. The quenching oil tank is filled with quenching oil. A second workpiece conveying mechanism is arranged in the quenching oil tank. The workpiece loading end of the second workpiece conveying mechanism is located below the outlet of the furnace body and is immersed in the quenching oil. The top of the quenching oil tank is covered with an oil tank cover. The quenching oil fume reflux device comprises a reflux pipe and a reflux fan, wherein a first end of the reflux pipe passes through the oil tank cover and extends into the quenching oil tank and is located above the quenching oil, and the reflux fan is installed in the reflux pipe and is used to generate a negative pressure for the quenching oil gas in the quenching oil tank to flow into the reflux pipe, and a second end of the reflux pipe is connected to the furnace of the combustion mechanism; The cleaning device comprises an ultrasonic cleaning mechanism, which comprises an ultrasonic cleaning container, a third workpiece conveying mechanism and an ultrasonic generator; The cleaning device further includes a cold water cleaning mechanism located between the ultrasonic cleaning mechanism and the tempering furnace, the cold water cleaning mechanism including a cold water cleaning container and a fourth workpiece conveying mechanism; and a water washing device, the water washing device including a water washing pipe, a water washing fan, a water tank and an air outlet pipe, the first end of the water washing pipe is connected to the interior of at least one of the ultrasonic cleaning container and the cold water cleaning container, the second end of the water washing pipe is immersed in the water in the water tank, the water washing fan is installed on the water washing pipe, the first end of the air outlet pipe is connected to the water tank and is located above the water surface, and the second end of the air outlet pipe extends in a direction away from the water tank; It also includes condensation louvers, which are vertically arranged and located between the quenching oil tank and the ultrasonic cleaning container, and the height of each blade of the condensation louver gradually decreases along the direction from the quenching oil tank to the ultrasonic cleaning container.

2. The heat treatment equipment for quenching oil gas reburning water purification according to claim 1 is characterized in that: The workpiece conveying end of the second workpiece conveying mechanism is located above or inside the ultrasonic cleaning container, the ultrasonic generator is fixed in the ultrasonic cleaning container, and the third workpiece conveying mechanism is located in the ultrasonic cleaning container.

3. The heat treatment equipment for quenching oil gas reburning water purification according to claim 2 is characterized in that: The cold water cleaning container contains cold water at 4° C.-8° C., and the fourth workpiece conveying mechanism is used to convey the workpiece to the tempering furnace.

4. The heat treatment equipment for quenching oil gas reburning water purification according to claim 3 is characterized in that: It also includes a spray device located between the cold water cleaning mechanism and the tempering furnace.

5. The heat treatment equipment for quenching oil gas reburning water purification according to any one of claims 2 to 4, characterized in that: A baffle is fixed below the oil tank cover, the lower end of the baffle is immersed in quenching oil, and both side edges of the baffle are respectively fixed to the two inner walls of the quenching oil tank, and the space on the side of the baffle facing the first workpiece conveying mechanism forms an oil and gas enriched area, and the space on the side of the baffle away from the first workpiece conveying mechanism forms a quenching oil and gas free area.

6. The heat treatment equipment for quenching oil gas reburning water purification according to claim 5, characterized in that: A pressure fan is installed on the oil tank cover, and the air outlet of the pressure fan is connected to the non-quenching oil and gas area.

7. The heat treatment equipment for quenching oil gas reburning water purification according to claim 5, characterized in that: The second workpiece conveying mechanism is a hoist, and a quenching oil dripping fan is fixed above the hoist, and the air outlet of the quenching oil dripping fan is arranged toward the hoist.

8. The heat treatment equipment for quenching oil gas reburning water purification according to claim 5, characterized in that: The ultrasonic cleaning mechanism also includes an oil scavenger, a feed port of the oil scavenger is located below the water level in at least one of the ultrasonic cleaning container and the cold water cleaning container and is arranged close to the water level line, and an oil outlet of the oil scavenger extends to the quenching oil tank.

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