Oil smoke separation device suitable for tempering furnace

Abstract

The oil fume separation device is arranged at a waste gas discharge port of the tempering furnace and comprises a waste gas collection cover covering the waste gas discharge port, a waste gas conveying pipe, an oil fume separation barrel, a separation gas inlet pump and an air conveying pipe, an exhaust gas inlet, an air inlet and an oil-gas discharge outlet are respectively formed in the side wall of the lower part, the top and the bottom of the oil-smoke separation cylinder; one end of the waste gas conveying pipe is communicated with the waste gas collecting cover and the other end is communicated with the waste gas inlet; the output end of the separation air inlet pump is communicated with the air inlet through an air conveying pipe; the separation air inlet pump introduces air through the input end and pumps the air into the oil fume separation barrel through the air conveying pipe from the output end, and waste gas exhausted from the waste gas exhaust port is collected by the waste gas collection cover and input into the oil fume separation barrel through the waste gas conveying pipe. Waste gas in the oil-smoke separation cylinder is cooled by air, and liquid waste oil is separated out by the oil-smoke separation mechanism and is discharged through the oil-gas discharge port, so that oil smoke in the waste gas is effectively separated.

Description

Technical Field

[0001] The utility model relates to a waste gas treatment technology in the field of workpiece heat treatment, in particular to an oil fume separation device suitable for a tempering furnace. Background Art

[0002] At present, tempering furnaces used in the workpiece heat treatment industry are rarely equipped with exhaust gas purification devices or exhaust gas filtering devices. The exhaust gas generated by the tempering furnace is usually caused by the quenching oil attached to the workpiece turning into oil smoke after the oil-containing workpiece is heated in the tempering furnace. During the heat treatment, the tempering furnace directly discharges the generated exhaust gas to the outside of the workshop through the exhaust gas discharge port by introducing air from the air inlet. Since the temperature of the exhaust gas is relatively low, it is not suitable to be treated by exhaust gas combustion. In the long run, the direct discharge of the exhaust gas will have an adverse effect on the health of the operators and the surrounding environment. However, with the continuous improvement of people's health awareness and the gradual improvement of the country's environmental protection requirements, the untreated emission method of the exhaust gas from the tempering furnace has been difficult to meet the operating requirements. Therefore, how to provide a waste gas treatment device that can effectively treat the exhaust gas of the tempering furnace and effectively separate the main harmful components (quenching oil) therein has become one of the technical problems that need to be solved in the field of workpiece heat treatment. Utility Model Content

[0003] The technical problem to be solved by this technical solution is how to provide a waste gas treatment device that can effectively separate the oil smoke from the waste gas discharged from the tempering furnace.

[0004] In order to solve the above technical problems, the present technical scheme provides an oil fume separation device suitable for a tempering furnace, the oil fume separation device is installed at the exhaust gas discharge port of the tempering furnace and comprises: an exhaust gas collecting hood, an exhaust gas delivery pipe, an oil fume separation cylinder, a separation air intake pump and an air delivery pipe, wherein the exhaust gas collecting hood is covered at the exhaust gas discharge port, one end of the exhaust gas delivery pipe is connected to the exhaust gas collecting hood, the oil fume separation cylinder is vertically arranged and an oil fume separation mechanism is arranged inside the cylinder, and the lower side wall, top and bottom of the oil fume separation cylinder are respectively provided with The waste gas inlet, air inlet and oil and gas discharge port are connected to each other, the other end of the waste gas delivery pipe is connected to the waste gas inlet, and the output end of the separation air intake pump is connected to the air inlet through the air delivery pipe, wherein the separation air intake pump introduces air through its input end and pumps it into the oil fume separation cylinder through the air delivery pipe from the output end, and the waste gas discharged from the waste gas discharge port is collected by the waste gas collecting hood and input into the oil fume separation cylinder through the waste gas delivery pipe, in the oil fume separation cylinder, the waste gas is cooled by air and at the same time, the liquid waste oil is separated by the oil fume separation mechanism and discharged through the oil and gas discharge port. Accordingly, the exhaust gas is thoroughly cooled by the air in the oil fume separation cylinder, so that the main harmful component quenching oil in the exhaust gas is condensed by the oil fume separation mechanism to separate into liquid waste oil. Afterwards, under the action of gravity and the slight positive pressure in the oil fume separation cylinder, the separated liquid waste oil and the separated light exhaust gas (basically air) will be discharged through the oil and gas discharge port together with the introduced air, so that the main harmful component quenching oil in the exhaust gas is finally effectively separated, and the separated light exhaust gas is further diluted by the introduced air to greatly reduce its harmfulness, thereby greatly reducing the adverse effects on the operators and the surrounding environment, and making the discharged exhaust gas meet environmental protection requirements.

[0005] As another implementation of the present technical solution, the oil fume separation cylinder is a vertically arranged columnar body and an oil fume separation chamber is formed therein. The oil fume separation mechanism is composed of several bowl-shaped separation bowls which are inverted and arranged in the oil fume separation chamber at the same intervals from bottom to top, and an annular smoke escape distance is formed between the outer edges of the several separation bowls and the inner side wall of the oil fume separation cylinder. The exhaust gas inlet is opened on the side wall of the oil fume separation cylinder below the lowest separation bowl, and the other end of the exhaust gas conveying pipe is fixedly connected to the exhaust gas inlet and the port at the other end of the exhaust gas conveying pipe extends to below the lowest separation bowl. Accordingly, the exhaust gas input from the lower part of the oil fume separation cylinder rises due to its temperature and is blocked by the inverted separation bowl, causing most of the exhaust gas to be retained in the space inside the separation bowl and further cooled, and the exhaust gas overflowing upward from the smoke escape distance will also be blocked and cooled by the air introduced from above and enter the separation bowl above. The oil fume (vapor quenching oil) in the exhaust gas in the separation bowl will be cooled and condensed on the wall of the separation bowl to form oil droplets. Since the separation bowl is inverted, the condensed liquid oil droplets will drip downward under the action of gravity and the blowing of the introduced air, gather and finally be discharged from the oil and gas discharge port.

[0006] As another implementation of the technical solution, the bottom of the oil fume separation chamber is funnel-shaped, and the oil and gas discharge port is located at the center of the bottom of the oil fume separation chamber. This is not only conducive to the collection of liquid waste oil, but also more conducive to the discharge of liquid waste oil.

[0007] As another implementation of the present technical solution, the exhaust gas discharge port is equipped with an exhaust gas discharge pipe, the outlet end of the exhaust gas discharge pipe extends to the outside of the tempering furnace and is vertically arranged upward, the exhaust gas collection cover is in the shape of an inverted funnel and its open end is downwardly covered at the outlet end and the port of the outlet end is located in the exhaust gas collection cover, and its contracted end is connected and communicated with one end of the exhaust gas delivery pipe. Since the exhaust gas discharged from the tempering furnace has temperature and dissipates in an upward state, the outlet end of the exhaust gas discharge pipe arranged vertically upward and the exhaust gas collection cover arranged in the shape of an inverted funnel can effectively ensure that the discharged exhaust gas is collected and prevented from dissipating outward, and the inverted funnel-shaped exhaust gas collection cover can also inhale air from the open end when collecting and transporting the exhaust gas, so as to preliminarily cool the exhaust gas in the process of inputting the exhaust gas into the oil fume separation cylinder.

[0008] As another implementation of the technical solution, the oil fume separation device further includes: an oil and gas discharge pipe, one end of which is connected to the oil and gas discharge port, and the other end of which is provided with a waste oil recovery device. Thus, the separated liquid waste oil, light waste gas and introduced air can be guided through the oil and gas discharge pipe and discharged into the waste oil recovery device, thereby facilitating the collection of waste gas separations.

[0009] As another implementation of the technical solution, the waste oil recovery device is a movable waste liquid barrel, the upper part of which is open, and the other end of the oil and gas discharge pipe is suspended at the open part of the waste liquid barrel. In this way, it is convenient to collect the separated liquid waste oil and to discharge the further diluted mild waste gas.

[0010] As another implementation of the technical solution, a control valve is provided at the other end of the oil and gas discharge pipe, so that the oil and gas discharge pipe can be closed when the waste liquid barrel is replaced.

[0011] As another implementation of the technical solution, the oil fume separation device further comprises: a fixing frame, the fixing frame is fixedly mounted on the outer wall of the furnace body of the tempering furnace, the exhaust gas conveying pipe and the oil fume separation cylinder are mounted on the upper part of the fixing frame, and the separation air intake pump is mounted on the side end of the fixing frame away from the outer wall of the furnace body. In this way, the structural strength of the oil fume separation device can be enhanced and the maintenance of the components can be facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a side sectional view of the oil fume separation device suitable for a tempering furnace according to the utility model.

[0013] Explanation of symbols in the accompanying drawings: 1 oil fume separation device suitable for tempering furnace; 10 exhaust gas collecting hood; 20 exhaust gas conveying pipe; 21 port at the other end; 30 oil fume separation cylinder; 31 oil fume separation mechanism; 311 separation bowl; 32 exhaust gas inlet; 33 air inlet; 34 oil and gas discharge port; 35 oil fume separation chamber; 40 separation air intake pump; 41 output end; 42 input end; 50 air conveying pipe; 60 oil and gas discharge pipe; 61 control valve; 70 waste oil recovery device; 80 fixing frame; 9 tempering furnace; 90 exhaust gas discharge port; 91 exhaust gas discharge pipe; 92 outlet end. DETAILED DESCRIPTION

[0014] The detailed description and technical contents of the present invention are described below with reference to the accompanying drawings. However, the accompanying drawings are only provided for reference and description and are not intended to limit the present invention.

[0015] In the context of this specification, any two or more embodiments of the present invention may be arbitrarily combined, and the technical solution thus formed belongs to part of the original disclosure of this specification and also falls within the protection scope of the present invention.

[0016] like Figure 1FIG. 1 is a side cross-sectional view of a specific embodiment of the utility model of an oil fume separation device 1 (solid line part) for tempering furnace installed at an exhaust gas outlet 90 of a tempering furnace 9 (dotted line part) of an existing furnace structure. The oil fume separation device 1 for tempering furnace (hereinafter referred to as the oil fume separation device 1) includes an exhaust gas collection cover 10, an exhaust gas conveying pipe 20, an oil fume separation cylinder 30, a separation air intake pump 40 and an air conveying pipe 50. Among them, the exhaust gas collecting hood 10 is covered on the exhaust gas discharge port 90, one end of the exhaust gas conveying pipe 20 is connected to the exhaust gas collecting hood 10, the oil fume separation cylinder 30 is vertically arranged and has an oil fume separation mechanism 31 inside, and the lower side wall, top and bottom of the oil fume separation cylinder 30 are respectively provided with an exhaust gas inlet 32, an air inlet 33 and an oil and gas discharge port 34 which are communicated with the inside of the oil fume separation cylinder 30, the other end of the exhaust gas conveying pipe 20 is connected to the exhaust gas inlet 32, and the output end 41 of the separation air intake pump 40 is connected to the air inlet 33 through the air conveying pipe 50. When the oil fume separation device 1 is in operation, the separation air intake pump 40 introduces external air with relatively low temperature through its input end 42 and pumps it into the oil fume separation cylinder 30 through the output end 41 via the air delivery pipe 50, while the relatively high temperature exhaust gas discharged from the exhaust gas discharge port 90 is collected by the exhaust gas collection hood 10 and input into the oil fume separation cylinder 30 through the exhaust gas delivery pipe 20. In the oil fume separation cylinder 30, the exhaust gas is cooled by air and at the same time, the liquid waste oil is separated by the oil fume separation mechanism 31 and discharged through the oil and gas discharge port 34. It should be noted that during the heat treatment process of the workpiece, the tempering furnace 9 will discharge the exhaust gas generated inside through the exhaust gas discharge port 90 by introducing air from the air inlet (not shown in the figure). Therefore, the exhaust gas has a certain kinetic energy when it is discharged. That is to say, after the exhaust gas is discharged, it can enter the oil fume separation cylinder 30 through the exhaust gas collection hood 10 and the exhaust gas delivery pipe 20 under the action of its kinetic energy, and will not cause backflow due to the air introduced by the separation air intake pump 40 (low power), and the input exhaust gas and air can form a slightly positive pressure environment in the oil fume separation cylinder 30, so as to promote the separated liquid waste oil, light exhaust gas and introduced air to be discharged through the oil and gas discharge port 34.

[0017] Specifically, the oil fume separation cylinder 30 is a vertically arranged columnar body and an oil fume separation chamber 35 is formed therein. The oil fume separation mechanism 31 is composed of a plurality of bowl-shaped separation bowls 311 which are inverted and arranged in the oil fume separation chamber 35 at the same interval from bottom to top. The separation bowls 311 can be fixedly mounted on the inner wall of the oil fume separation cylinder 30 by a fixing component (not shown in the figure), and a ring-shaped smoke escape interval (not shown in the figure) is formed between the outer periphery of the plurality of separation bowls 311 and the inner wall of the oil fume separation cylinder 30. The exhaust gas inlet 32 ​​is opened on the side wall of the oil fume separation cylinder 30 below the lowest separation bowl 311, and the other end of the exhaust gas conveying pipe 20 is fixedly connected to the exhaust gas inlet 32 ​​and the port 21 at the other end of the exhaust gas conveying pipe 20 extends to the bottom of the lowest separation bowl 311. The exhaust gas input from the lower part of the oil fume separation cylinder 30 rises due to its temperature and is blocked by the separation bowl 311 set in an inverted shape, so that most of the exhaust gas is retained in the space inside the separation bowl 311 and is further cooled, and the exhaust gas overflowing upward from the exhaust gas escape interval will also be blocked and cooled by the air introduced from above and enter the separation bowl 311 above, and the oil fume (vapor quenching oil) in the exhaust gas in the separation bowl 311 will be cooled and condensed on the wall of the separation bowl 311 to form oil droplets, and because the separation bowl 311 is in an inverted shape, the condensed liquid oil droplets will drip downward under the action of gravity and the blowing of the introduced air and finally be discharged from the oil and gas discharge port 34. The bottom of the oil fume separation chamber 35 can be set in a funnel shape (not shown in the figure), and the oil and gas discharge port 34 is located at the center of the bottom of the oil fume separation chamber 35, which is not only conducive to the collection of liquid waste oil, but also more conducive to the discharge of liquid waste oil.

[0018] In addition, an exhaust gas discharge pipe 91 may be installed at the exhaust gas discharge port 90 of the tempering furnace 9, and the outlet end 92 of the exhaust gas discharge pipe 91 extends to the outside of the tempering furnace 9 and is vertically arranged upward. The exhaust gas discharge pipe 91 can guide the exhaust gas inside the tempering furnace 9 to be discharged in a set direction. The exhaust gas collection cover 10 is in the shape of an inverted funnel, and its open end is downwardly covered on the outlet end 92 of the exhaust gas discharge pipe 91, so that the port of the outlet end 92 is located in the exhaust gas collection cover 10, and the constricted end of the exhaust gas collection cover 10 is connected and communicated with one end of the exhaust gas delivery pipe 20. Since the exhaust gas discharged from the tempering furnace 9 has temperature and dissipates in an upward state, the outlet end 92 of the exhaust gas discharge pipe 91 arranged vertically upward and the exhaust gas collecting hood 10 arranged in an inverted funnel shape can effectively ensure that the exhausted exhaust gas is collected to prevent the exhaust gas from dissipating outward, and the inverted funnel-shaped exhaust gas collecting hood 10 can also inhale air from the outside through the open end when collecting and transporting the exhaust gas, so as to preliminarily cool the exhaust gas in the process of inputting the exhaust gas into the oil fume separation cylinder 30.

[0019] In this embodiment, the oil fume separation device 1 may also include an oil and gas discharge pipe 60, one end of which is connected to the oil and gas discharge port 34, and the other end of which is provided with a waste oil recovery device 70. The separated liquid waste oil, light waste gas and introduced air can be guided and discharged into the waste oil recovery device 70 through the oil and gas discharge pipe 60, so as to facilitate the collection of waste gas separations. Further, the waste oil recovery device 70 can be a movable waste liquid barrel, the upper part of the waste liquid barrel has an opening, and the other end of the oil and gas discharge pipe 60 is suspended at the opening of the waste liquid barrel, so as to facilitate the collection of the separated liquid waste oil and the discharge of the further diluted light waste gas. Furthermore, the other end of the oil and gas discharge pipe 60 can also be provided with a control valve 61, so as to facilitate the closing operation of the oil and gas discharge pipe 60 when the waste liquid barrel is replaced.

[0020] In addition, the oil fume separation device 1 may further include a fixing frame 80, which may be composed of a rod structure or a plate splicing structure, etc., which is not limited by the present invention. The fixing frame 80 is fixedly mounted on the outer wall of the furnace body of the tempering furnace 9, the exhaust gas conveying pipe 20 and the oil fume separation cylinder 30 are mounted on the upper part of the fixing frame 80, and the separation air intake pump 40 is mounted on the side end of the fixing frame 80 away from the outer wall of the furnace body, thereby strengthening the structural strength of the oil fume separation device 1 and facilitating the loading and unloading and maintenance of the components.

[0021] In summary, the oil fume separation device of the utility model can be used to thoroughly cool the exhaust gas discharged from the tempering furnace in the oil fume separation cylinder and separate the oil fume, so that the quenching oil, the main harmful component in the exhaust gas, is condensed by the oil fume separation mechanism to separate and form liquid waste oil, and under the action of gravity and the slight positive pressure in the oil fume separation cylinder, the separated liquid waste oil and the separated light exhaust gas (basically air) will be discharged through the oil and gas exhaust port together with the introduced air, and finally the quenching oil, the main harmful component in the exhaust gas, is effectively separated, and the separated light exhaust gas is further diluted by the introduced air to greatly reduce its harmfulness, thereby greatly reducing the adverse effects on the operators and the surrounding environment, and making the discharged exhaust gas meet environmental protection requirements.

[0022] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Other equivalent changes made using the patent concept of the present invention should all fall within the patent protection scope of the present invention.

Claims

1. An oil fume separation device suitable for a tempering furnace, installed at the exhaust gas discharge port of the tempering furnace, characterized in that: The oil fume separation device comprises: an exhaust gas collection hood, an exhaust gas delivery pipe, an oil fume separation cylinder, a separation air intake pump and an air delivery pipe. The exhaust gas collection hood is arranged on the exhaust gas discharge port, one end of the exhaust gas delivery pipe is connected to the exhaust gas collection hood, the oil fume separation cylinder is arranged vertically and an oil fume separation mechanism is arranged inside the cylinder, and the lower side wall, top and bottom of the oil fume separation cylinder are respectively provided with an exhaust gas inlet, an air inlet and an oil gas discharge port communicated with the interior thereof, and the other end of the exhaust gas delivery pipe is connected to the exhaust gas inlet. The output end of the separation air intake pump is connected to the air inlet through the air delivery pipe, wherein the separation air intake pump introduces air through its input end and pumps the air from the output end into the oil fume separation cylinder through the air delivery pipe, and the exhaust gas discharged from the exhaust gas discharge port is collected by the exhaust gas collecting hood and input into the oil fume separation cylinder through the exhaust gas delivery pipe, in the oil fume separation cylinder, the exhaust gas is cooled by the air and at the same time, the liquid waste oil is separated by the oil fume separation mechanism and discharged through the oil and gas discharge port.

2. The oil fume separation device according to claim 1, characterized in that: The oil fume separation cylinder is a vertically arranged columnar body and an oil fume separation chamber is formed therein. The oil fume separation mechanism is composed of several bowl-shaped separation bowls which are inverted and arranged in the oil fume separation chamber at the same interval from bottom to top, and an annular smoke escape distance is formed between the outer peripheries of the several separation bowls and the inner side walls of the oil fume separation cylinder. The exhaust gas inlet is opened on the side wall of the oil fume separation cylinder below the lowest separation bowl, and the other end of the exhaust gas conveying pipe is fixedly connected to the exhaust gas inlet and the port at the other end of the exhaust gas conveying pipe extends to below the lowest separation bowl.

3. The oil fume separation device according to claim 2, characterized in that: The bottom of the oil fume separation chamber is funnel-shaped, and the oil and gas discharge port is located at the center of the bottom of the oil fume separation chamber.

4. The oil fume separation device according to claim 1, characterized in that: The exhaust gas discharge port is equipped with an exhaust gas discharge pipe, the outlet end of the exhaust gas discharge pipe extends to the outside of the tempering furnace and is vertically arranged upward, the exhaust gas collecting cover is in the shape of an inverted funnel and its open end is downwardly covered on the outlet end so that the port of the outlet end is located in the exhaust gas collecting cover, and its contracted end is connected to one end of the exhaust gas delivery pipe.

5. The oil fume separation device according to claim 1, characterized in that: Also includes: An oil and gas discharge pipe, one end of which is connected to the oil and gas discharge port, and the other end of which is provided with a waste oil recovery device.

6. The oil fume separation device according to claim 5, characterized in that: The waste oil recovery device is a movable waste liquid barrel, the upper part of the waste liquid barrel is provided with an opening, and the other end of the oil and gas discharge pipe is suspended at the opening of the waste liquid barrel.

7. The oil fume separation device according to claim 6, characterized in that: The other end of the oil and gas discharge pipe is provided with a control valve.

8. The oil fume separation device according to claim 1, characterized in that: It also includes: a fixing frame, which is fixedly mounted on the outer wall of the furnace body of the tempering furnace, the exhaust gas conveying pipe and the oil fume separation cylinder are mounted on the upper part of the fixing frame, and the separation air intake pump is mounted on the side end of the fixing frame away from the outer wall of the furnace body.

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