Three-phase separator

Abstract

The embodiment of the utility model provides a three-phase separator, and relates to the field of kitchen waste treatment. The three-phase separator comprises a three-phase separator body, an oil discharge pipeline, a pressure balance pipeline and a cooling device, the oil discharge pipeline is connected to the three-phase separator body, one end of the pressure balance pipeline is communicated with the oil discharge pipeline, and the other end of the pressure balance pipeline is communicated with a deodorization air pipe of a deodorization system. The cooling device is arranged on the pressure balance pipeline, and the cooling device can cool the grease-containing gas in the pressure balance pipeline, so that the temperature of the gas entering the deodorization air pipe is reduced, and the deodorization air pipe is prevented from being burnt and deformed.

Description

Technical Field

[0001] This utility model relates to the field of food waste treatment, specifically to a three-phase separator. Background Technology

[0002] In the treatment of food waste, pretreatment systems typically employ three-phase separators to separate oil, water, and residue from the food waste slurry, specifically to extract grease. The working principle of a three-phase separator is to amplify the density difference between oil, water, and residue through high-speed rotation, accelerating the stratification and sedimentation of each material, thereby achieving grease extraction. The discharge pipes of the three-phase separator are all sealed. This sealing is necessary to prevent odor escape and slurry splashing. The inventors discovered that the internal rotating components of the three-phase separator, during high-speed rotation, agitate the gas inside the machine and some of the gas in the discharge pipe, creating a localized positive pressure near the discharge outlet, hindering material discharge. Based on this, the inventors connected the grease discharge pipe to the deodorization system via a pipeline to balance the gas pressure. However, because the temperature of the grease-containing gas separated by the three-phase separator can reach 70°C or higher, it is extremely easy to damage the deodorization pipes. Utility Model Content

[0003] This invention provides a three-phase separator that can cool down high-temperature gases containing grease, preventing damage to deodorization pipes.

[0004] The embodiments of this utility model can be implemented as follows:

[0005] An embodiment of this utility model provides a three-phase separator, which includes:

[0006] Three-phase separator body;

[0007] Oil drain pipe, which is connected to the body of the three-phase separator;

[0008] The pressure balancing pipe is connected at one end to the oil drain pipe and at the other end to the deodorizing duct of the deodorizing system.

[0009] The cooling device is installed in the pressure balancing pipeline and can cool the oil-containing gas in the pressure balancing pipeline.

[0010] Optionally, the cooling device is a heat exchanger, which is installed in the pressure balancing pipeline.

[0011] Optionally, the pressure balancing pipeline includes a connecting pipeline and a negative pressure pipeline. The connecting pipeline has a first end and a second end, with the height of the first end being lower than the height of the second end. The first end is connected to the oil drain pipeline, and the second end is connected to the negative pressure pipeline. The connecting pipeline, the heat exchanger, and the negative pressure pipeline are connected in sequence.

[0012] Optionally, the heat exchanger has an internal chamber and a heat exchange chamber surrounding the internal chamber. The internal chamber and the heat exchange chamber are isolated from each other. The connecting pipe, the internal chamber and the negative pressure pipe are connected in sequence. The heat exchange chamber is used to circulate the cooling medium, which can exchange heat with the internal chamber.

[0013] Optionally, the bottom of the heat exchanger is provided with an oil drain port that communicates with the internal chamber;

[0014] The three-phase separator also includes an oil storage tank and an oil recovery pipe. One end of the oil recovery pipe is connected to the oil storage tank, and the other end of the oil recovery pipe is connected to the oil drain port.

[0015] The oil drain pipe is also connected to the grease storage tank.

[0016] Optionally, at least one inner wall surface of the internal chamber is inclined toward the oil drain port.

[0017] Optionally, the heat exchanger has a heat inlet end and a heat outlet end, both of which are connected to the internal chamber. A connecting pipe is connected to the heat inlet end, and a negative pressure pipe is connected to the heat outlet end. The height of the heat inlet end is lower than the height of the heat outlet end.

[0018] Optionally, the heat exchanger has a cold flow inlet end and a cold flow outlet end, both of which are connected to the heat exchange chamber, and the height of the cold flow inlet end is higher than the height of the cold flow outlet end.

[0019] Optionally, the three-phase separator also includes a hot water storage tank, a hot water delivery pipe and a cold water delivery pipe, one end of the hot water delivery pipe is connected to the hot water storage tank, the other end of the hot water delivery pipe is connected to the cold flow outlet, and the cold water delivery pipe is connected to the cold flow inlet.

[0020] Optionally, the three-phase separator also includes a negative pressure generator, and at least one of the connecting pipe and the negative pressure pipe is equipped with a negative pressure generator.

[0021] The beneficial effects of this utility model embodiment:

[0022] The three-phase separator of this utility model includes a three-phase separator body, an oil drain pipe, a pressure balancing pipe, and a cooling device. The oil drain pipe is connected to the three-phase separator body. One end of the pressure balancing pipe is connected to the oil drain pipe, and the other end of the pressure balancing pipe is connected to the deodorization duct of the deodorization system. The cooling device is installed in the pressure balancing pipe and can cool the oil-containing gas in the pressure balancing pipe, thereby reducing the temperature of the gas when it enters the deodorization duct and preventing the deodorization duct from being scalded and deformed. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the three-phase separator provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the connection structure of the heat exchanger provided in an embodiment of this utility model.

[0026] Icons: 1-Pressure balancing pipe; 11-Connecting pipe; 111-First end; 112-Second end; 12-Negative pressure pipe; 2-Negative pressure generator; 3-Heat exchanger; 31-Hot flow inlet end; 32-Hot flow outlet end; 33-Internal chamber; 34-Cold flow inlet end; 35-Cold flow outlet end; 36-Heat exchange chamber; 37-Oil drain port; 4-Grease recovery pipe; 5-Three-phase separator body; 51-Oil drain pipe; 52-Condensed grease; 6-Deodorizing air duct; 7-Grease temporary storage tank; 8-Hot water storage tank; 81-Hot water delivery pipe; 82-Cold water delivery pipe. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Unless otherwise explicitly specified and limited, terms such as "setup" and "connection" should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0035] Please refer to Figure 1 This utility model provides a three-phase separator, including: a three-phase separator body 5, an oil drain pipe 51, a pressure balancing pipe 1, and a cooling device. The oil drain pipe 51 is connected to the three-phase separator body 5. One end of the pressure balancing pipe 1 is connected to the oil drain pipe 51, and the other end of the pressure balancing pipe 1 is connected to the deodorizing duct 6 of the deodorizing system. The cooling device is installed in the pressure balancing pipe 1 and can cool the oil-containing gas in the pressure balancing pipe 1, thereby reducing the temperature of the gas when it enters the deodorizing duct 6 and preventing the deodorizing duct 6 from being scalded and deformed.

[0036] In this embodiment, the pressure balancing pipe 1 is connected to the oil drain pipe 51 near the outlet, so that the pressure balancing pipe 1 can quickly balance the air pressure at the outlet of the oil drain pipe 51.

[0037] It should be noted that in this embodiment, the air pressure in the pressure balancing pipe 1 is lower than the air pressure in the oil drain pipe 51. Therefore, the air pressure in the pressure balancing pipe 1 is negative relative to the air pressure in the oil drain pipe 51, thereby balancing the air pressure in the oil drain pipe 51.

[0038] It is understood that the pressure balancing pipe 1 and the oil drain pipe 51 are connected in a sealed manner. The pressure balancing pipe 1 and the oil drain pipe 51 can be connected by any of the following methods: sealing ring / gasket, sealant, or welding. The end of the oil drain pipe 51 is connected to the three-phase separator body 5, which is existing equipment and will not be described in detail here.

[0039] Since the temperature of the grease-containing gas separated by the three-phase separator body 5 can reach 70°C or higher, the pressure balancing pipe 1 needs to be made of high-temperature resistant material, and the sealing facilities at the pressure balancing pipe 1 and the oil drain pipe 51 also need to have high-temperature resistant properties.

[0040] Of course, the pressure balancing pipe 1 can be a straight pipe or a bent pipe in the length direction; in the radial direction, the pressure balancing pipe 1 can be a circular pipe of equal diameter, a circular pipe of varying diameter, or any of the various shapes such as square pipe or elliptical pipe.

[0041] In this embodiment, the pressure balancing pipeline 1 includes a connecting pipeline 11 and a negative pressure pipeline 12, both of which are straight pipes. The connecting pipeline 11 is inclined relative to the vertical oil drain pipeline 51, while the negative pressure pipeline 12 is horizontal. That is, the connecting pipeline 11 and the oil drain pipeline 51 have an angle of less than 90°.

[0042] The connecting pipe 11 has a first end 111 and a second end 112. The first end 111 is connected to the oil discharge pipe 51, and the second end 112 is connected to the negative pressure pipe 12. The height of the first end 111 is lower than the height of the second end 112. Since the temperature of the three-phase separator body 5 can reach 70°C or higher when rotating and separating grease from the kitchen slurry, the gas flowing through the oil discharge pipe 51 has a high temperature. Furthermore, some of the floating grease droplets in the oil discharge pipe 51 will escape into the connecting pipe 11. By tilting the connecting pipe 11 so that the first end 111 is lower than the second end 112, the hot gas in the oil discharge pipe 51 can quickly enter the connecting pipe 11, thus quickly balancing the local positive pressure at the outlet of the oil discharge pipe 51. Simultaneously, the grease droplets entering the connecting pipe 11 with the hot gas will adhere to the inner wall of the connecting pipe 11 and then flow back to the oil discharge pipe 51 along the tilted connecting pipe 11, thereby improving the grease recovery rate and reducing grease waste and environmental pollution.

[0043] The angle of inclination between the connecting pipe 11 and the drain pipe 51 is greater than or equal to 0° and less than 90°, with common values ​​being 30°, 45°, and 60°.

[0044] The length of the connecting pipe 11 depends on the specific circumstances. The longer the connecting pipe 11 is, the better the effect of adhering grease droplets. For example, when the hot gas in the oil drain pipe 51 contains a higher content of grease droplets, the length of the connecting pipe 11 can be increased, thereby increasing the grease recovery rate.

[0045] At least one of the connecting pipe 11 and the negative pressure pipe 12 is equipped with a negative pressure generator 2. For example, a negative pressure generator 2 may be installed on the connecting pipe 11, or on the negative pressure pipe 12, or on both the connecting pipe 11 and the negative pressure pipe 12. The number of negative pressure generators 2 installed is not limited, but the number of negative pressure generators 2 is greater than or equal to one. The negative pressure generator 2 is used to discharge the gas in the pressure balancing pipe 1 to the outside, so that the internal air pressure of the pressure balancing pipe 1 is lower than the air pressure in the oil discharge pipe 51, thereby balancing the local positive pressure at the outlet of the oil discharge pipe 51, so that the grease in the oil discharge pipe 51 can flow smoothly to the grease storage tank 7.

[0046] In this embodiment, the negative pressure generator 2 is installed on the negative pressure pipe 12 so that the negative pressure generator 2 is far away from the oil drain pipe 51. The grease droplets that escape into the connecting pipe 11 first flow through the connecting pipe 11, causing some of the grease droplets to adhere to the inner wall of the connecting pipe 11, thereby reducing the amount of grease droplets adhering to the negative pressure generator 2 and preventing excessive grease accumulation on the negative pressure generator 2 from affecting its normal operation.

[0047] In this embodiment, the negative pressure generator 2 can be selected from devices that can generate negative pressure, such as axial flow fans, vacuum generators, and vacuum pumps. The negative pressure generator 2 makes the air pressure in the negative pressure pipeline 12 and the connecting pipeline 11 lower than the air pressure in the oil drain pipeline 51.

[0048] As mentioned above, the hot gas entering the connecting pipe 11 from the oil drain pipe 51 has a high temperature, and the grease droplets contained in the hot gas cannot be completely adhered and recovered when they flow through the connecting pipe 11. In order to further improve the grease recovery rate and avoid the waste of heat from the hot gas, a heat exchanger 3 is selected as the cooling device. The heat exchanger 3 can recover the heat from the hot gas on the one hand, and recover the grease droplets in the hot gas on the other hand.

[0049] Please refer to Figure 2In this embodiment, the heat exchanger 3 is disposed between the connecting pipe 11 and the negative pressure pipe 12. The connecting pipe 11, the heat exchanger 3, and the negative pressure pipe 12 are connected in sequence, and the heat exchanger 3 is simultaneously connected to both the connecting pipe 11 and the negative pressure pipe 12. In other embodiments, the heat exchanger 3 may also be disposed on the connecting pipe 11, or on the negative pressure pipe 12, or two heat exchangers 3 may be disposed on both the connecting pipe 11 and the negative pressure pipe 12.

[0050] The heat exchanger 3 in this embodiment has an internal chamber 33 and a heat exchange chamber 36 surrounding the internal chamber 33. The internal chamber 33 and the heat exchange chamber 36 are isolated from each other. The connecting pipe 11, the internal chamber 33 and the negative pressure pipe 12 are connected in sequence. The heat exchange chamber 36 is used to circulate the cooling medium. The cooling medium can exchange heat with the internal chamber 33, thereby recovering the heat of the hot gas.

[0051] Specifically, the heat exchanger 3 has a hot flow inlet end 31 and a hot flow outlet end 32, both of which are connected to the internal chamber 33. A connecting pipe 11 is connected to the hot flow inlet end 31, and a negative pressure pipe 12 is connected to the hot flow outlet end 32. The heat exchanger 3 also has a cold flow inlet end 34 and a cold flow outlet end 35, both of which are connected to the heat exchange chamber 36. The heat exchange chamber 36 is connected to a cooling medium, which flows within the chamber. When the hot gas in the connecting pipe 11 enters the internal chamber 33, the heat carried by the hot gas exchanges heat with the cooling medium, thereby lowering the temperature of the hot gas and completing heat recovery.

[0052] Optionally, the height of the heat inlet end 31 is lower than the height of the heat outlet end 32. Due to the low density of hot gas, the hot gas will flow to the upper part of the internal chamber 33 after entering the internal chamber 33. Therefore, the position of the heat outlet end 32 is set higher than the heat inlet end 31, which is conducive to the flow of hot gas. After the heat exchange is completed, the hot gas in the internal chamber 33 is discharged from the heat outlet end 32.

[0053] In order to fully exchange heat with the hot gas and improve the heat exchange rate, the height of the cold flow inlet 34 is higher than the height of the cold flow outlet 35. That is, the cold flow inlet 34 is located in the upper part near the heat exchange chamber 36, and the cold flow outlet 35 is located in the lower part near the heat exchange chamber 36. The cooling medium flows from the upper part to the lower part of the heat exchange chamber 36, so that the direction of the cooling medium flow is opposite to the direction of the hot gas flow, increasing the heat exchange path and improving the heat exchange rate.

[0054] Similarly, the heat inlet end 31 and the heat outlet end 32 are located on opposite sides of the internal chamber 33, respectively. The hot gas needs to flow from one side of the internal chamber 33 to the other side, increasing the flow path of the hot gas in the internal chamber 33, thereby improving the heat exchange rate.

[0055] Continue to refer to Figure 2 In this embodiment, the heat exchanger 3 is a cylindrical body with a hollow interior forming an internal chamber 33. The heat inlet end 31 and the heat outlet end 32 penetrate the side wall of the cylindrical body. A heat exchange chamber 36 is formed inside the side wall of the cylindrical body. The heat exchange chamber 36 can be a continuous channel surrounding the internal chamber 33. The continuous channel is spirally coiled or distributed in a zigzag pattern, thereby ensuring sufficient heat exchange between the cooling medium and the hot gas. It is worth noting that the opening of the heat inlet end 31 and the heat outlet end 32 needs to avoid the continuous channel.

[0056] Of course, to further improve heat exchange efficiency, the residence time of hot gas in the internal chamber 33 can be increased by reducing the flow velocity of the hot gas. For example, a baffle can be installed in the internal chamber 33, with the baffle surface facing the heat inlet end 31. The hot gas discharged from the connecting pipe 11 directly impacts the baffle, reducing the movement velocity of the hot gas and extending its residence time in the internal chamber 33. Furthermore, the travel distance of the hot gas from the heat inlet end 31 to the heat outlet end 32 is also further increased, resulting in more efficient heat exchange. The baffle can be U-shaped, with one side fixedly connected to the inner wall of the internal chamber 33, and the other side suspended in the internal chamber 33 and located in front of the heat inlet end 31. It is important to note that the baffle also needs to have thermal conductivity, such as being made of metal materials like iron or copper, to conduct heat to the shell of the heat exchanger 3.

[0057] In other embodiments, the heat exchanger 3 may also be a plurality of spiral tubes that are in contact with each other and are wound together. Here, "a plurality of tubes" means that there are no fewer than two spiral tubes, and the interior of each spiral tube is hollow. At least one spiral tube is connected to the connecting pipe 11 and the negative pressure pipe 12, and at least one spiral tube is connected to the cooling medium, thereby realizing the recovery of heat from the hot gas.

[0058] In this embodiment, the cooling medium can be a liquid or a gas. For example, using cold water as the cooling medium is not only economical but also convenient to operate.

[0059] After the hot gas completes heat exchange in the internal chamber 33, its temperature drops, and the temperature of the grease droplets moving with the hot gas also drops. The small-volume grease droplets floating in the internal chamber 33 gradually converge to form a large-volume condensed grease 52. The condensed grease 52 drips to the bottom of the internal chamber 33, thus completing the further recovery of grease.

[0060] In order to discharge the condensed grease 52 accumulated in the internal chamber 33 in a timely manner, an oil drain port 37 communicating with the internal chamber 33 is provided at the bottom of the heat exchanger 3, and the condensed grease 52 is discharged from the oil drain port 37.

[0061] The three-phase separator also includes a grease storage tank 7 and a grease recovery pipe 4. One end of the grease recovery pipe 4 is connected to the grease storage tank 7, and the other end is connected to the oil drain port 37. The condensed grease 52 in the internal chamber 33 of the heat exchanger 3 enters the grease recovery pipe 4 through the oil drain port 37, and the grease recovery pipe 4 guides the condensed grease 52 into the grease storage tank 7. Of course, the oil drain pipe 51 is also connected to the grease storage tank 7, which is located at the lower part of the oil drain pipe 51 and the heat exchanger 3.

[0062] It should be understood that, in this embodiment, a switch valve can also be installed on the grease recovery pipe 4 and the oil discharge pipe 51 to control the opening and closing of the grease recovery pipe 4 and the oil discharge pipe 51.

[0063] Optionally, at least one inner wall surface of the internal chamber 33 is inclined toward the oil drain port 37, so that the oil drain port 37 gradually contracts from top to bottom, which avoids the accumulation of condensed grease 52 from not being able to be discharged in time and quickly. At the same time, the gradually contracting oil drain port 37 also helps to gather the dispersed condensed grease 52 together.

[0064] Optionally, the inner wall of the internal chamber 33 is a continuous smooth surface, allowing grease droplets to slide down from top to bottom and eventually converge. This improves the grease recovery rate and prevents condensed grease 52 from adhering to the inner wall of the internal chamber 33 for an extended period, thus avoiding affecting the heat exchange effect of the subsequently entering hot gas.

[0065] Understandably, the negative pressure generator 2 is installed on the negative pressure pipe 12, located behind the heat exchanger 3. The grease content in the hot gas discharged from the heat exchanger 3 has been greatly reduced after secondary recovery by the heat exchanger 3, thereby reducing the accumulation of grease on the negative pressure generator 2.

[0066] After shutdown, the internal rotating and spiral structures of the three-phase separator body 5 must be cleaned with hot water to avoid dynamic balance problems during the next startup. In this embodiment of the invention, a heat exchanger 3 is used to recover heat from the hot gas in the pressure balance pipe 1. The recovered heat can be used to heat water, which is then used to rinse the internal rotating and spiral structures of the three-phase separator body 5.

[0067] Refer again Figure 1The three-phase separator also includes a hot water storage tank 8, a hot water delivery pipe 81, and a cold water delivery pipe 82. One end of the hot water delivery pipe 81 is connected to the hot water storage tank 8, and the other end is connected to the cold flow outlet 35. The cold water delivery pipe 82 is connected to the cold flow inlet 34. The cooling medium is process tap water. The process tap water flows from the cold water delivery pipe 82 into the heat exchange space, exchanges heat with the hot gas, and then exits from the cold flow outlet 35. It then flows through the hot water delivery pipe 81 into the hot water storage tank 8 for rinsing the three-phase separator body 5. This method of directly using process tap water to exchange heat with the hot gas in the internal chamber 33 of the heat exchanger 3 reduces intermediate processes, avoids heat loss, and achieves heat recovery with high heat exchange efficiency.

[0068] exist Figure 1 In the diagram, solid arrows represent the flow paths of hot gas and grease, while hollow arrows represent the flow paths of the cooling medium. Hot gas containing grease droplets is discharged to the oil drain pipe 51 after rotating and stratifying in the three-phase separator body 5. Most of the hot gas containing grease droplets enters the grease storage tank 7, while the remaining hot gas enters the internal chamber 33 of the heat exchanger 3 through the connecting pipe 11 to achieve secondary grease recovery and heat exchange of the hot gas. The heat-exchanged hot gas is discharged from the negative pressure pipe 12, and the recovered grease is stored uniformly in the grease storage tank 7. The cooling medium flows in from the cold water delivery pipe 82, and then exchanges heat with the hot gas in the internal chamber 33 of the heat exchange chamber 36. The heated cooling medium is discharged from the cold flow outlet 35, and then discharged into the hot water storage tank 8 through the hot water delivery pipe 81.

[0069] The hot gas discharged from the negative pressure pipe 12 is odorous. In this embodiment, the negative pressure pipe 12 is connected to the deodorizing air pipe 6, and the connection between the negative pressure pipe 12 and the deodorizing air pipe 6 is sealed.

[0070] The three-phase separator of this utility model embodiment has at least the following beneficial effects:

[0071] (1) A pressure balancing pipe 1 was installed, which balanced the positive pressure at the outlet of the oil drain pipe 51, thus solving the problem that the grease could not flow to the grease storage tank 7 due to the positive pressure at the outlet of the oil drain pipe 51.

[0072] (2) A heat exchanger 3 was installed to perform secondary recovery of grease through the heat exchanger 3, which improved the grease recovery rate and solved the problem of grease accumulation and solidification at the bottom of the pipeline; moreover, the heat of the hot gas was recovered, avoiding heat loss and solving the problem of pipeline deformation and collapse caused by high temperature hot gas.

[0073] (3) A hot water storage tank 8 and a hot water delivery pipe 81 are set up to exchange heat with the process tap water and hot gas. The hot water generated is used to clean the three-phase separator body 5, and at the same time, it accelerates the condensation speed of grease in the internal chamber 33.

[0074] (4) The negative pressure pipe 12 is connected to the deodorizing air pipe 6 to prevent odor from overflowing; the amount of grease entering the deodorizing air pipe 6 is greatly reduced, which reduces the difficulty of waste gas treatment and extends the service life of the deodorizing system packing.

[0075] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A three-phase separator, characterized in that, The application relates to a three-phase separator body (5), an oil discharge pipeline (51) connected to the three-phase separator body (5), a pressure balance pipeline (1) with one end communicated with the oil discharge pipeline (51) and the other end communicated with a deodorization air pipe (6) of a deodorization system, and a cooling device arranged in the pressure balance pipeline (1) and capable of cooling oil-containing gas in the pressure balance pipeline (1). The cooling device is a heat exchanger (3) arranged in the pressure balance pipeline (1). The pressure balance pipeline (1) comprises a communication pipeline (11) with a first end (111) and a second end (112), wherein the height of the first end (111) is lower than that of the second end (112), the first end (111) is connected with the oil discharge pipeline (51), the second end (112) is connected with the negative pressure pipeline (12), and the communication pipeline (11), the heat exchanger (3) and the negative pressure pipeline (12) are sequentially connected. The heat exchanger (3) has an inner chamber (33) and a heat exchange chamber (36) surrounding the inner chamber (33), the inner chamber (33) and the heat exchange chamber (36) are isolated from each other, the communication pipeline (11), the inner chamber (33) and the negative pressure pipeline (12) are sequentially communicated, the heat exchange chamber (36) is used for flowing cooling medium, and the cooling medium can exchange heat with the inner chamber (33). The bottom of the heat exchanger (3) is provided with an oil discharge port (37) communicated with the inner chamber (33).

2. The three-phase separator of claim 1, wherein, The three-phase separator further comprises a grease temporary storage tank (7) and a grease recovery pipeline (4), one end of the grease recovery pipeline (4) is communicated with the grease temporary storage tank (7), and the other end of the grease recovery pipeline (4) is connected with the oil discharge port (37).

3. The three-phase separator of claim 2, wherein, The oil discharge pipeline (51) is also communicated with the grease temporary storage tank (7).

4. The three-phase separator of claim 3, wherein, At least one inner wall surface of the inner chamber (33) is obliquely arranged towards the oil discharge port (37).

5. The three-phase separator of claim 4, wherein, The heat exchanger (3) has a hot flow inlet end (31) and a hot flow outlet end (32), the hot flow inlet end (31) and the hot flow outlet end (32) are both communicated with the inner chamber (33), the communication pipeline (11) is connected with the hot flow inlet end (31), the negative pressure pipeline (12) is connected with the hot flow outlet end (32), and the height of the hot flow inlet end (31) is lower than that of the hot flow outlet end (32). The heat exchanger (3) has a cold flow inlet end (34) and a cold flow outlet end (35), the cold flow inlet end (34) and the cold flow outlet end (35) are both communicated with the heat exchange chamber (36), and the height of the cold flow inlet end (34) is higher than that of the cold flow outlet end (35). ​ 6. The three-phase separator of claim 5, wherein, ​ 7. The three-phase separator of claim 4, wherein, ​ 8. The three-phase separator of claim 4, wherein, ​ 9. The three-phase separator of claim 8, wherein, The three-phase separator further comprises a hot water storage tank (8), a hot water delivery pipe (81) and a cold water delivery pipe (82), one end of the hot water delivery pipe (81) being in communication with the hot water storage tank (8), the other end of the hot water delivery pipe (81) being in communication with the cold flow outlet end (35), the cold water delivery pipe (82) being in communication with the cold flow inlet end (34).

10. The three-phase separator of any one of claims 3 to 9, wherein, The three-phase separator further comprises a negative pressure generator (2), the communication pipe (11) and at least one of the negative pressure pipes (12) being provided with the negative pressure generator (2).

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