Tail gas recovery device for oil separation tank

Abstract

The utility model discloses a tail gas recovery device for an oil separator. The tail gas recovery device comprises the oil separator, a gas collecting pipe, a gas collecting disc and a gas mixing disc which are sequentially arranged from bottom to top, a top cover is arranged on the oil separation tank, the gas collecting pipe comprises two conical pipes which are symmetrically arranged, the two conical pipes are connected through a throat pipe, a gas spraying pipe is arranged in the throat pipe, the end parts of the two conical pipes are respectively connected with a straight pipe section, one straight pipe section is communicated with an inner cavity of the top cover, and the other straight pipe section is communicated with an inner cavity of the gas collecting disc; a communicating pipe communicated with the gas mixing disc is arranged in the center of the gas collecting disc, a spiral flow channel is arranged in the gas mixing disc, an exhaust pipe is connected to an outlet of the spiral flow channel, and a plurality of gas mixing mechanisms are further arranged in the spiral flow channel; negative pressure is formed above the liquid surface of the oil separation tank, volatile combustible gas is pumped out and can be efficiently mixed with air in the process, the downstream can be directly sent into an incinerator for ignition and heat energy recovery operation, the tail gas of the oil separation tank can be prevented from polluting the environment, and the energy utilization rate is improved.

Description

Technical Field

[0001] The utility model relates to the field of fitness equipment, in particular to a grease trap tail gas recovery device. Background Art

[0002] A grease trap is a device that separates oil and water by using the difference in density between oil and water and the principle that oil and water are immiscible. Its liquid surface will volatilize a variety of flammable gases. If they are not collected, it will not only cause energy waste but also pollute the environment. Therefore, an exhaust gas recovery device suitable for a grease trap is needed. Utility Model Content

[0003] In view of the problems existing in the background technology, the purpose of the utility model is to provide a grease trap tail gas recovery device, which effectively solves the problems existing in the background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An exhaust gas recovery device for a grease trap comprises a grease trap, an air collecting pipe, an air collecting plate and an air mixing plate which are arranged in sequence from bottom to top; a spherical top cover is arranged on the grease trap, the air collecting pipe comprises two symmetrically arranged conical pipes, the two conical pipes are connected via a throat, an upward jetting pipe is coaxially arranged in the throat, and the ends of the two conical pipes are respectively connected with straight pipe sections, one of which is connected with the inner cavity of the top cover, and the other is connected with the inner cavity of the air collecting plate; a connecting pipe connected with the air mixing plate is arranged at the center of the air collecting plate, a spiral flow channel is arranged in the air mixing plate, the connecting pipe corresponds to the inlet of the spiral flow channel, an exhaust pipe is connected to the outlet of the spiral flow channel, and a plurality of air mixing mechanisms are also arranged in the spiral flow channel;

[0006] The mixing mechanism includes a flow channel plate, a guide cone and a rectifying grid which are arranged in sequence. The flow channel plates are multiple and are respectively fixed on the inner wall of the spiral flow channel. The flow channel plates and the inner wall of the spiral flow channel together form a peripheral flow channel. All the flow channel plates together form a central flow channel. The peripheral flow channel is provided with an air outlet facing the central flow channel; the guide cone is coaxially arranged with the central flow channel and the apex of the guide cone faces the incoming air direction; the rectifying grid is located downstream of the guide cone, and the rectifying grid includes multiple vertical plates and horizontal plates.

[0007] Furthermore, there are multiple air collecting pipes, and the multiple air collecting pipes are evenly distributed along the circumference of the cross-section of the top cover.

[0008] Furthermore, an air supply pipe is arranged at the periphery of the air collecting pipe, and the air supply pipe is connected with the air injection pipe.

[0009] Furthermore, the cross section of the spiral flow channel is rectangular.

[0010] Furthermore, the number of the flow channel plates is four, and the four flow channel plates are respectively arranged on four inner walls of the spiral flow channel.

[0011] Furthermore, the guide cone is fixed on the inner wall of the spiral flow channel through a connecting rod.

[0012] The utility model has the following beneficial technical effects:

[0013] The utility model can form negative pressure above the liquid surface of the grease trap to extract volatile combustible gas, which can also be efficiently mixed with air during the extraction process. The downstream can be directly sent to the incinerator for ignition and heat recovery operations. The application is novel in design and safe in operation. It can not only avoid environmental pollution caused by exhaust gas from the grease trap but also improve energy utilization, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the embodiment of the utility model after removing the gas mixing mechanism;

[0015] Figure 2 This is a schematic diagram of the structure of the gas collecting pipe in the embodiment of the utility model;

[0016] Figure 3 It is a top view of the internal structure of the gas mixing disk after removing the gas mixing mechanism in the embodiment of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the gas mixing mechanism in the embodiment of the utility model;

[0018] Figure 5 It is a side view of the assembly structure of the flow channel plate and the spiral flow channel in the embodiment of the utility model;

[0019] Figure 6 It is a side view of the rectifying grid in the embodiment of the utility model. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0021] In the description of the present utility model, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does 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 cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] like Figure 1-6 As shown, the grease trap tail gas recovery device described in this embodiment includes a grease trap 1, an air collecting pipe 2, an air collecting plate 3 and an air mixing plate 4 arranged in sequence from bottom to top; a spherical top cover 5 is provided on the grease trap 1, and the air collecting pipe 2 includes two symmetrically arranged conical pipes 6, which are connected by a throat 7, and an upward jet pipe 8 is coaxially arranged in the throat 7. The ends of the two conical pipes 6 are also connected with straight pipe sections, one of which is connected to the inner cavity of the top cover 5, and the other is connected to the inner cavity of the air collecting plate 3. The number of the preferred air collecting pipes 2 is multiple , multiple gas collecting pipes 2 are evenly distributed along the cross-section of the top cover 5, and an air supply pipe 9 is arranged on the periphery of the gas collecting pipe 2, and the air supply pipe 9 is connected to the injection pipe 8, and the air supply pipe 9 is connected to an air compressor or a compressed gas storage bottle upstream; a connecting pipe 10 connected to the mixing plate 4 is arranged at the center of the gas collecting plate 3, and a spiral flow channel 11 is arranged in the mixing plate 4, and the connecting pipe 10 corresponds to the inlet of the spiral flow channel 11, and the outlet of the spiral flow channel 11 is connected to an exhaust pipe 12, and the exhaust pipe 12 can be directly connected to the air inlet of the incinerator, and a plurality of mixing mechanisms are arranged in the spiral flow channel 11 from upstream to downstream;

[0023] The above-mentioned mixing mechanism includes a flow channel plate 13, a guide cone 14 and a rectifying grid 15 which are arranged in sequence. The cross section of the spiral flow channel 11 is rectangular. There are four flow channel plates 13 which are respectively fixed on the four inner walls of the spiral flow channel 11. The flow channel plates 13 and the inner wall of the spiral flow channel 11 form a peripheral flow channel 16. All the flow channel plates form a central flow channel 17. The peripheral flow channel 16 is provided with an outlet hole 18 facing the central flow channel; the guide cone 14 is fixed on the inner wall of the spiral flow channel 11 through a connecting rod and the guide cone 14 is coaxially arranged with the central flow channel 17, and the vertex of the guide cone 14 faces the incoming gas direction; the rectifying grid 15 is located downstream of the guide cone 14. The rectifying grid 15 includes a plurality of vertical plates and horizontal plates. A rectangular flow channel 19 is formed between the vertical plates and the horizontal plates and between the vertical plates and the horizontal plates and the spiral flow channel 11. The gas is combed when passing through the rectifying grid 15.

[0024] The working principle of this embodiment is:

[0025] The jet pipe 8 sprays upward, and a negative pressure is formed at the lower end of the gas collecting pipe 2, which sucks the gas in the top cover 5. The gas enters the gas collecting plate 3 through the gas collecting pipe 2, and then enters the entrance of the spiral flow channel 11 in the mixing plate 4 through the connecting pipe 10. The gas moves along the spiral flow channel 11 while passing through the mixing mechanism. The gas close to the inner wall of the spiral flow channel 11 is forced to be diverted and mixed with the gas at the center of the spiral flow channel 11, and then is dispersed by the guide cone 14 and refills the spiral flow channel 11. The gas continues to flow stably after being combed by the rectifying grid 15. After the action of all the mixing mechanisms, the volatile combustible gas is completely mixed with the air, and then is sent to the incinerator by the exhaust pipe 12; this embodiment forms a negative pressure above the liquid surface of the grease trap 1 to extract the volatile combustible gas, which can also be efficiently mixed with the air during the extraction process, and can be directly sent to the incinerator downstream for ignition and heat recovery operations. The present application is novel in design and safe in operation. It can not only avoid the environmental pollution caused by the tail gas of the grease trap but also improve the energy utilization rate, and has strong practicality.

[0026] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific uses.

Claims

1. Grease trap tail gas recovery device, characterized in that: It comprises an oil separator, an air collecting pipe, an air collecting plate and an air mixing plate which are arranged in sequence from bottom to top; the oil separator is provided with a spherical top cover, the air collecting pipe comprises two symmetrically arranged conical pipes, the two conical pipes are connected by a throat pipe, an air jet pipe spraying upward is coaxially arranged in the throat pipe, and the ends of the two conical pipes are respectively connected with straight pipe sections, one of which is connected with the inner cavity of the top cover, and the other is connected with the inner cavity of the air collecting plate; a connecting pipe connected with the air mixing plate is arranged at the center of the air collecting plate, a spiral flow channel is arranged in the air mixing plate, the connecting pipe corresponds to the inlet of the spiral flow channel, an exhaust pipe is connected at the outlet of the spiral flow channel, and a plurality of air mixing mechanisms are also arranged in the spiral flow channel; The mixing mechanism includes a flow channel plate, a guide cone and a rectifying grid which are arranged in sequence. The flow channel plates are multiple and are respectively fixed on the inner wall of the spiral flow channel. The flow channel plates and the inner wall of the spiral flow channel together form a peripheral flow channel. All the flow channel plates together form a central flow channel. The peripheral flow channel is provided with an air outlet facing the central flow channel; the guide cone is coaxially arranged with the central flow channel and the apex of the guide cone faces the incoming air direction; the rectifying grid is located downstream of the guide cone, and the rectifying grid includes multiple vertical plates and horizontal plates.

2. The grease trap tail gas recovery device according to claim 1, characterized in that: There are multiple air collecting pipes, and the multiple air collecting pipes are evenly distributed along the circumference of the cross section of the top cover.

3. The grease trap tail gas recovery device according to claim 1 or 2, characterized in that: An air supply pipe is arranged on the periphery of the air collecting pipe, and the air supply pipe is communicated with the air injection pipe.

4. The grease trap tail gas recovery device according to claim 1, characterized in that: The cross section of the spiral flow channel is rectangular.

5. The grease trap tail gas recovery device according to claim 4, characterized in that: The number of the flow channel plates is four, and the four flow channel plates are respectively arranged on the four inner walls of the spiral flow channel.

6. The grease trap tail gas recovery device according to claim 1, characterized in that: The guide cone is fixed on the inner wall of the spiral flow channel through a connecting rod.

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