Device for purifying oil mist waste gas

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a device for purifying oil mist waste gas, which comprises a vacuum pump unit and an oil mist waste gas purification component which are hermetically connected with each other. The oil mist waste gas purification assembly comprises a plate heat exchanger, an oil mist gas inlet pipe and a coolant inlet pipe are arranged on the two opposite side walls, close to the bottom end, of the plate heat exchanger correspondingly, and a tail gas exhaust pipe and a coolant outlet pipe are arranged on the two opposite side walls, close to the top end, of the plate heat exchanger correspondingly; compared with the prior art, the oil mist waste gas purification device has the advantages that firstly, oil mist waste gas is liquefied through the plate heat exchanger, the liquefied oil mist waste gas is recycled and retreated in time, and finally, harmful gas and dust particles in the tail gas are filtered through the oil mist filter, so that the purification work of the oil mist waste gas is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a device for purifying oil mist waste gas. Background Art

[0002] In industrial production, many equipment often produce a large amount of oil mist and oil smoke, which are directly discharged into the air without treatment, causing a large amount of waste gas pollution, polluting the environment, and having an adverse impact on our living and working environment, affecting people's health. In order to effectively solve these problems of oil mist pollution emissions, a device for purifying oil mist exhaust gas is proposed. Utility Model Content

[0003] The purpose of the utility model is to provide a device for purifying oil mist exhaust gas to solve the problems raised in the above background technology.

[0004] The technical solution adopted by the utility model is:

[0005] A device for purifying oil mist exhaust gas, comprising: a vacuum pump unit and an oil mist exhaust gas

[0006] Purification component, sealed connection between vacuum pump unit and oil mist exhaust purification component;

[0007] The oil mist exhaust gas purification component comprises:

[0008] The plate heat exchanger has oil mist inlet pipes disposed on the two opposite side walls adjacent to the bottom.

[0009] and the coolant inlet pipe, and the two opposite walls of the plate heat exchanger adjacent to the top are respectively

[0010] An exhaust gas discharge pipe and a coolant outlet pipe are provided;

[0011] The oil mist filter is arranged above the plate heat exchanger.

[0012] Preferably, the oil mist exhaust gas purification component also includes:

[0013] A first three-way pipe, arranged at one end of the oil mist inlet pipe, one end of the first three-way pipe being sealed and connected to a flange of the oil mist inlet pipe;

[0014] A second three-way pipe is arranged at one end of the exhaust gas exhaust pipe, and one end of the second three-way pipe is sealed and connected to the exhaust gas exhaust pipe flange;

[0015] an arc-shaped pipe, one end of which is sealedly connected to the second three-way pipe, and the other end of which is connected to the oil mist filter;

[0016] Wherein, the second three-way pipe is arranged above the first three-way pipe.

[0017] Preferably, the first three-way pipe and the second three-way pipe are in a T-shaped tubular structure.

[0018] Preferably, a second cap is detachably provided at the bottom end of the outlet of the second three-way pipe.

[0019] Preferably, a first cap is detachably provided at the bottom end of the outlet of the first three-way pipe.

[0020] Preferably, the vacuum pump unit comprises:

[0021] A foreline pump, which is sealed and connected to the Roots vacuum pump via a connecting pipe;

[0022] The oil mist exhaust pipe is arranged on the Roots vacuum pump, and the oil mist exhaust pipe is connected to the oil mist exhaust gas purification component through a flange seal.

[0023] Preferably, an elastic tube is provided on the connecting tube.

[0024] Preferably, a micron filter element is provided in the oil mist filter.

[0025] Preferably, the micron filter element is a 0.6 micron filter element.

[0026] Preferably, a plate heat exchanger supporting component is provided at the bottom of the plate heat exchanger.

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] In the utility model, the oil mist exhaust gas passes through the oil mist exhaust pipe and the first three-way pipe into the plate heat exchanger in cooperation with the front pump and the Roots vacuum pump. At the same time, cooling ethylene glycol is injected into the plate heat exchanger through the coolant inlet pipe. The cooling ethylene glycol and the oil mist exhaust gas flow simultaneously. During the flow, the cooling ethylene glycol takes away the heat of the oil mist exhaust gas, and converts most of the oil mist exhaust gas from a gas state to a liquid state. The oil mist exhaust gas converted into liquid passes through the tail gas discharge pipe and enters the second three-way pipe and is stored at the outlet of the second three-way pipe. The second cap is opened to recycle the liquefied oil mist exhaust gas for reprocessing. A small amount of tail gas further enters the oil mist filter through the arc pipe. The harmful gas and dust particles in the oil mist exhaust gas are filtered out by the oil mist filter, thereby completing the purification of the oil mist exhaust gas. The purified oil mist exhaust gas is discharged into the air without causing pollution to the environment or affecting people's health. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic diagram of the overall structure of this application.

[0031] Figure 2 It is a right side schematic diagram of this application.

[0032] Reference numerals:

[0033] 10. Fore pump; 11. Connecting pipe; 12. Roots vacuum pump; 13. Sealing plate; 14. Support part; 15. Base; 16. Oil mist exhaust pipe;

[0034] 20. First three-way pipe; 200. First cap; 21. Oil mist inlet pipe; 22. Coolant inlet pipe; 23. Plate heat exchanger; 24. Exhaust gas discharge pipe; 25. Coolant outlet pipe; 26. Second three-way pipe; 260. Second cap; 27. Arc pipe; 28. Oil mist filter;

[0035] 30. Replace the support components. DETAILED DESCRIPTION

[0036] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0042] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0043] As attached Figure 1 -Attached Figure 2 As shown, the embodiment of the utility model provides a device for purifying oil mist exhaust gas, including: a vacuum pump unit and an oil mist exhaust gas purification component, one side of the vacuum pump unit is sealed and connected to the oil mist exhaust gas purification component through a flange.

[0044] The vacuum pump unit comprises: a fore pump 10 , a connecting pipe 11 , a Roots vacuum pump 12 , a sealing plate 13 and an oil mist exhaust pipe 16 .

[0045] The fore pump 10 is usually a rotary vane pump or a dry pump. The fore pump 10 is mainly responsible for the initial evacuation and is responsible for reducing the pressure to a certain level so that the main pump can start working normally. The fore pump 10 is sealed and connected to the Roots vacuum pump 12 through the connecting pipe 11. In order to facilitate the installation and connection of the fore pump 10 and the Roots vacuum pump 12, seal and reduce the influence of mechanical vibration on the normal operation of the fore pump 10 and the Roots vacuum pump 12, a section of elastic tube (not shown in the figure) is usually connected to the connecting pipe 11 between the fore pump 10 and the Roots vacuum pump 12. The elastic tube can use a metal bellows, a special rubber elastic tube, or a soft plastic tube lined with a metal spring. The Roots vacuum pump 12 is a rotary vacuum pump with a relatively low compression ratio. It starts and runs stably at a relatively low pressure. It extracts air by rotating two symmetrical rotors (not shown in the figure) at high speed in the shell of the Roots vacuum pump 12. In order to facilitate opening the inside of the Roots vacuum pump 12 to overhaul various components, a sealing plate 13 is provided on the Roots vacuum pump 12. When it is necessary to overhaul the components in the Roots vacuum pump 12, the sealing plate 13 can be opened for overhaul, and the sealing plate 13 can be closed when the overhaul is completed. The Roots vacuum pump 12 is also provided with an oil mist exhaust pipe 16, and the oil mist exhaust pipe 16 is connected to the oil mist exhaust gas purification component, and the oil mist exhaust pipe 16 is connected to the oil mist exhaust gas purification component through a flange seal.

[0046] In order to better improve the sealing performance of the connection between the oil mist exhaust pipe 16 and the oil mist exhaust gas purification component, preferably, the flange sealing connection in this embodiment adopts a flat flange and a sealing groove flange that cooperate with each other, wherein a groove (not shown in the figure) is provided on the sealing surface of the sealing groove flange, and a sealing gasket (not shown in the figure) is placed in the groove, and then the flat flange is placed on the sealing gasket so that the flat flange and the sealing groove flange are aligned with each other, and finally the flat flange and the sealing groove flange are fixed together by bolts and nuts, so as to meet the requirements of the sealing connection between the oil mist exhaust pipe 16 and the oil mist exhaust gas purification component.

[0047] Furthermore, the oil mist exhaust gas purification component includes: a first three-way pipe 20, a plate heat exchanger 23, an oil mist air inlet pipe 21, a coolant inlet pipe 22, an exhaust gas exhaust pipe 24, a coolant outlet pipe 25 and a second three-way pipe 26.

[0048] The plate heat exchanger 23 is a rectangular parallelepiped structure, and the oil mist inlet pipe 21 and the coolant inlet pipe 22 are respectively arranged on the two opposite side walls near the bottom of the plate heat exchanger 23, and the exhaust gas exhaust pipe 24 and the coolant outlet pipe 25 are respectively arranged on the two opposite side walls near the top of the plate heat exchanger 23. That is to say, the oil mist inlet pipe 21 and the exhaust gas exhaust pipe 24 are on the same side wall, and the coolant inlet pipe 22 and the coolant outlet pipe 25 are on the same side wall.

[0049] The first three-way pipe 20 is arranged between the oil mist exhaust pipe 16 and the oil mist intake pipe 21. One end of the first three-way pipe 20 is connected to the oil mist exhaust pipe 16 by flange sealing, and the other end is connected to the oil mist intake pipe 21 by flange sealing. Similarly, the flange sealing connection here also adopts the method of mutual cooperation of flat flange and sealing groove flange. The first three-way pipe 20 is a T-shaped tubular structure. The liquefied oil mist exhaust gas will be stored in the pipeline at the outlet of the first three-way pipe 20. The bottom end of the outlet of the first three-way pipe 20 is detachably provided with a first cap 200. The setting of the first cap 200 can control whether the outlet of the first three-way pipe 20 is in an open state or a closed state.

[0050] The second three-way pipe 26 is arranged above the first three-way pipe 20, that is, one end of the second three-way pipe 26 is connected to the exhaust gas exhaust pipe 24 by flange sealing. Similarly, the flange sealing connection here also adopts the method of mutual cooperation between the flat flange and the sealing groove flange. The second three-way pipe 26 is a T-shaped tubular structure, and the liquefied oil mist exhaust gas will be stored in the pipe at the outlet of the second three-way pipe 26. The bottom end of the outlet of the second three-way pipe 26 is detachably provided with a second cap 260. Similarly, the setting of the second cap 260 is also to control whether the outlet of the second three-way pipe 26 is in an open state or a closed state.

[0051] More specifically, the plate heat exchanger 23 is a highly efficient heat exchange device, which is composed of a series of metal sheets (not shown in the figure) with a certain corrugated shape stacked together, and thin rectangular channels (not shown in the figure) are formed between various plates, and gas-liquid heat exchange is performed through the plates. Preferably, the liquid in this embodiment is cooling ethylene glycol, and the gas is oil mist exhaust gas. The working principle of the plate heat exchanger 23 is as follows: first, the oil mist exhaust gas passes through the first three-way pipe 20 and the oil mist air inlet pipe 21 to enter the plate heat exchanger 23, and at the same time, the cooling glycol is injected into the plate heat exchanger 23 through the coolant inlet pipe 22. At this time, the oil mist exhaust gas and the cooling glycol in the plate heat exchanger 23 flow in their own thin rectangular channels, and the two do not interfere with each other. In the process of flowing with each other, the cooling glycol takes away the heat of the oil mist exhaust gas, so that the oil mist exhaust gas is converted from a gas state to a liquid state. The converted oil mist exhaust gas passes through the tail gas discharge pipe 24 and enters the second three-way pipe 26 to be stored at the outlet of the second three-way pipe 26. The oil mist exhaust gas in a liquid state is collected and collected by the second three-way pipe 26 for subsequent treatment. The cooling glycol that has finished flowing in the plate heat exchanger 23 passes through the coolant outlet pipe 25 and enters the cooling glycol recovery device (not shown in the figure) for next use.

[0052] Furthermore, in order to purify the oil mist exhaust gas more comprehensively, the oil mist exhaust gas purification component further includes: an arc-shaped pipe 27 and an oil mist filter 28 .

[0053] The arc-shaped pipe 27 is disposed at the other end of the second three-way pipe 26 , and is sealedly connected to one end of the second three-way pipe 26 . The arc-shaped pipe 27 is in an L-shaped structure.

[0054] The oil mist filter 28 is disposed at the other end of the arc-shaped pipe 27 and is sealed and connected to the other end of the arc-shaped pipe 27. A 0.6-micron filter element (not shown in the figure) is installed in the oil mist filter 28. The 0.6-micron filter element has a high filtering accuracy and can effectively remove particles and bacteria larger than 0.1 microns, thereby ensuring that the filtered gas reaches the required purity.

[0055] Furthermore, in order to prevent the Roots vacuum pump 12 from directly contacting the ground and reduce the loss of the Roots vacuum pump 12 body caused by the ground during operation, and to make the Roots vacuum pump 12 in a more stable state, the vacuum pump unit also includes a base 15 and a support portion 14, wherein the top of the base 15 is fixedly connected to the support portion 14, and the top of the support portion 14 is fixedly connected to the Roots vacuum pump 12.

[0056] Finally, in order to enable the plate heat exchanger 23 to maintain a high degree of stability during operation, a plate heat exchanger support component 30 is further provided at the bottom of the plate heat exchanger 23 .

[0057] When the device in this embodiment is used, the fore pump 10 is first started, the pre-pump valve (not shown in the figure) on the fore pump 10 and the valve (not shown in the figure) on the air inlet pipe of the Roots vacuum pump 12 are opened, and when the pressure in the system reaches the inlet pressure allowed by the Roots vacuum pump 12, the pre-pump valve is closed and the Roots vacuum pump 12 is started. The oil mist exhaust gas passes through the oil mist exhaust pipe 16 and the first three-way pipe 20 to enter the plate heat exchanger 23 in cooperation with the fore pump 10 and the Roots vacuum pump 12. At the same time, cooling glycol is injected into the plate heat exchanger 23 through the coolant inlet pipe 22. The cooling glycol and the oil mist exhaust gas flow simultaneously. During the flow, the cooling glycol takes away the heat of the oil mist exhaust gas and converts most of the oil mist exhaust gas from a gas state to a liquid state. The oil mist exhaust gas converted into a liquid passes through the tail gas discharge pipe 24 and enters the second three-way pipe 26 to be stored at the outlet of the second three-way pipe 26. The second cap 260 is opened to recycle the liquefied oil mist exhaust gas for reprocessing. A small amount of exhaust gas further enters the oil mist filter 28 through the arc pipe 27, and harmful gases and dust particles in the oil mist exhaust gas are filtered out by the oil mist filter 28. In this way, the oil mist exhaust gas is purified, and the purified oil mist exhaust gas is discharged into the air without causing pollution to the environment or affecting people's health.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for purifying oil mist exhaust gas, characterized in that: include: Vacuum pump unit and oil mist exhaust Purification component, sealed connection between vacuum pump unit and oil mist exhaust purification component; The oil mist exhaust gas purification component comprises: The plate heat exchanger (23) has oil mist inlet pipes (21) disposed on two opposite side walls adjacent to the bottom end. and the coolant inlet pipe (22), and the plate heat exchanger (23) has two opposite side walls adjacent to the top. An exhaust gas discharge pipe (24) and a coolant outlet pipe (25) are provided; An oil mist filter (28) is arranged above the plate heat exchanger (23).

2. The device for purifying oil mist exhaust gas according to claim 1, characterized in that: The oil mist exhaust gas purification component further comprises: a first three-way pipe (20), arranged at one end of the oil mist intake pipe (21), one end of the first three-way pipe (20) being flange-sealed to the oil mist intake pipe (21); a second three-way pipe (26), arranged at one end of the exhaust gas discharge pipe (24), one end of the second three-way pipe (26) being flange-sealed to the exhaust gas discharge pipe (24); and an arc-shaped pipe (27), one end of which is sealingly connected to the second three-way pipe (26) and the other end of which is connected to the oil mist filter (28); wherein the second three-way pipe (26) is arranged above the first three-way pipe (20).

3. The device for purifying oil mist exhaust gas according to claim 2, characterized in that: The first three-way pipe (20) and the second three-way pipe (26) are in a T-shaped tubular structure.

4. The device for purifying oil mist exhaust gas according to claim 2, characterized in that: A second cover cap (260) is detachably provided at the bottom end of the outlet of the second three-way pipe (26).

5. The device for purifying oil mist exhaust gas according to claim 2, characterized in that: A first cover cap (200) is detachably provided at the bottom end of the outlet of the first three-way pipe (20).

6. The device for purifying oil mist exhaust gas according to claim 1, characterized in that: The vacuum pump unit comprises: a front pump (10) which is sealed and connected to a Roots vacuum pump (12) via a connecting pipe (11); an oil mist exhaust pipe (16) which is arranged on the Roots vacuum pump (12); the oil mist exhaust pipe (16) is sealed and connected to the oil mist exhaust gas purification component via a flange.

7. The device for purifying oil mist exhaust gas according to claim 6, characterized in that: An elastic tube is provided on the connecting tube (11).

8. The device for purifying oil mist exhaust gas according to claim 1, characterized in that: The oil mist filter (28) is provided with a micron filter element.

9. The device for purifying oil mist exhaust gas according to claim 8, characterized in that: The micron filter element is a 0.6 micron filter element.

10. The device for purifying oil mist exhaust gas according to claim 1, characterized in that: A plate heat exchanger support component (30) is provided at the bottom of the plate heat exchanger (23).

Images