A material washing unit

Abstract

The utility model relates to a kind of material washing unit, including feed pipeline, booster mixing device, static mixer, connecting pipeline, oil-water separator and discharge pipeline, the booster mixing device is set on feed pipeline, for the booster and mixing of material and washing liquid, static mixer is composed of pipeline shell and the static element fixedly arranged in shell interior, static element includes at least one spiral vane that penetrates static mixer, the spiral direction of spiral vane is continuous, static mixer is connected with the outlet end of booster mixing device by connecting pipeline, for the sufficient washing of material and the reduction emulsification, oil-water separator is connected with the outlet end of static mixer by connecting pipeline, the outlet end of oil-water separator is connected discharge pipeline. Through continuous spiral channel, reduce the emulsification jamming situation of mixture in washing process, through booster mixing device, the effect of washing can be further improved.

Description

Technical Field

[0001] This utility model relates to a material washing unit. Background Technology

[0002] Alkaline washing or water washing is a crucial step in chemical production, especially for materials containing acidic substances or metal ions, such as recycled cumene or cumene containing hydrogen peroxide. Removing acidic substances and metal ions through alkaline washing and / or water washing can reduce side reactions in subsequent processes, thereby improving the overall utilization efficiency of raw materials. Initially, washing equipment typically uses washing tanks. For example, in alkaline washing, alkaline solution is added to the tank containing the material, followed by appropriate stirring and sedimentation. However, this method does not allow for sufficient contact between the alkaline solution and the material, resulting in poor washing effectiveness.

[0003] To improve the washing effect, a system and method for pretreatment of cumene feedstock in a CHPPO unit was published in CN111892474A. The system uses mechanical stirring to improve the mixing effect between cumene and alkaline solution. However, the alkaline washing mixture obtained by this method has severe emulsification, which results in a thick emulsion layer and difficulty in oil-water separation.

[0004] To reduce the negative impact of emulsification and improve the oil-water separation effect, a raw material processing method for the production of CHP by cumene peroxidation, published in CN116462563A, uses a static mixer filled with corrugated plates as the main alkaline washing device to enhance the dispersion effect of cumene and alkaline solution, while completing oil-water separation in the aggregator. However, the corrugated plate structure used in this method makes it easy for insoluble impurities in the alkaline washing mixture to aggregate into scale, which in turn causes the static mixer to become clogged.

[0005] Therefore, there is still a need in the field for a washing unit with good washing effect and good oil-water separation effect to improve the production efficiency of material washing. Utility Model Content

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0007] The technical problem this invention aims to solve is how to reduce emulsification and clogging of the mixture during the washing process while ensuring the washing effect.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a material washing unit, including a feed pipe, a pressurizing and mixing device, a static mixer, a connecting pipe, an oil-water separator, and a discharge pipe. The pressurizing and mixing device is installed on the feed pipe and is used for pressurizing and mixing the material and the washing liquid. The static mixer consists of a pipe-shaped shell and a stationary element fixedly installed inside the shell. The stationary element includes at least one spiral blade penetrating the static mixer. The spiral direction of the spiral blade is continuous. The static mixer is connected to the outlet end of the pressurizing and mixing device through the connecting pipe and is used for thorough washing of the material and reduction of emulsification. The oil-water separator is connected to the outlet end of the static mixer through the connecting pipe, and the outlet end of the oil-water separator is connected to the discharge pipe.

[0009] In a preferred embodiment of the material washing unit of this utility model, the stationary element consists of a central shaft and a first spiral blade, with the central shaft fixedly disposed inside the housing and the first spiral blade fixedly disposed on the central shaft.

[0010] In a preferred embodiment of the material washing unit of this utility model, the stationary element consists of a central shaft, a first spiral blade, and a second spiral blade. The central shaft is fixedly installed inside the housing, and the first spiral blade and the second spiral blade are fixedly installed parallel to each other on the central shaft.

[0011] In a preferred embodiment of the material washing unit of this utility model, the stationary element is a first spiral blade, which is fixedly disposed inside the housing.

[0012] In a preferred embodiment of the material washing unit of this utility model, the stationary element is composed of a first spiral blade and a second spiral blade, which are fixedly arranged in parallel within the housing, and the spiral directions of the first spiral blade and the second spiral blade are the same.

[0013] In a preferred embodiment of the material washing unit of this utility model, the pressurizing and mixing device is a pressurizing pipeline, which includes a three-way pipeline, a first pressurizing element, and a second pressurizing element. The first pressurizing element is disposed at the first port of the three-way pipeline. The material enters the three-way pipeline through the feed pipeline and the first pressurizing element. The second pressurizing element is disposed at the second port of the three-way pipeline. The washing liquid enters the three-way pipeline through the feed pipeline and the second pressurizing element. The third port of the three-way pipeline is connected to the inlet end of the static mixer through a connecting pipeline. The first pressurizing element is a first pressurizing valve or a first pressurizing pump, and the second pressurizing element is a second pressurizing valve or a second pressurizing pump.

[0014] As a preferred embodiment of the material washing unit of this utility model, the pressurized mixing device is a jet mixer, which is provided with a jet inlet and a side suction inlet. The washing liquid enters the jet mixer through the jet inlet via the feed pipe, and the material enters the jet mixer through the side suction inlet via the feed pipe. The outlet end of the jet mixer is connected to the inlet end of the static mixer via a connecting pipe.

[0015] In a preferred embodiment of the material washing unit of this utility model, the pressurized mixing device is a collision mixer, which includes a mixing chamber and a nozzle. The nozzle is disposed in the mixing chamber, and the material and washing liquid enter the mixing chamber through the nozzle via the feed pipe.

[0016] As a preferred embodiment of the material washing unit of this utility model, the discharge pipeline is provided with a circulation device for recycling the washing liquid. The circulation device includes a washing liquid tank and a transfer pump. The inlet end of the washing liquid tank is connected to the water phase outlet end of the oil-water separator through the discharge pipeline. The inlet end of the transfer pump is connected to the outlet end of the washing liquid tank through a pipeline. The outlet end of the transfer pump is connected to the washing liquid inlet end of the pressurized mixing device through the feed pipeline.

[0017] In a preferred embodiment of the material washing unit of this utility model, a pressure reducing component is provided on the connecting pipeline between the static mixer and the oil-water separator.

[0018] Beneficial effects:

[0019] 1. This material washing unit combines a pressurized mixing device and a static mixer with a spiral channel. The continuous spiral channel reduces the occurrence of emulsification and clogging of the mixture during the washing process, while the pressurized mixing device further improves the washing effect.

[0020] 2. This material washing unit has a simple overall structure, is easy to operate, and has a reasonable cost. It can be used for alkaline or water washing of cumene streams or cumene streams containing CHP in the process of preparing propylene oxide by the hydroperoxide (CHP) method. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0022] Figure 1 This is a schematic diagram of the overall structure of the material washing unit.

[0023] Figure 2 This is a schematic diagram of the first type of pressurized mixing device.

[0024] Figure 3 This is a schematic diagram of the first type of static mixer.

[0025] Figure 4 This is a schematic diagram of the second type of pressurized mixing device.

[0026] Figure 5 This is a schematic diagram of the second type of static mixer.

[0027] Figure 6 This is a schematic diagram of the third type of pressurized mixing device.

[0028] Figure 7 This is a schematic diagram of the third type of static mixer.

[0029] Figure 8 This is a schematic diagram of the fourth type of pressurized mixing device.

[0030] Figure 9 This is a schematic diagram of the fourth type of static mixer.

[0031] In the diagram: 1. Pressurized mixing device; 11. First pressurized valve; 12. Second pressurized valve; 13. Three-way pipe; 14. Jet inlet; 15. Side suction inlet; 16. First pressurized pump; 17. Second pressurized pump; 18. First nozzle; 19. Second nozzle; 2. Static mixer; 21. Housing; 221. First helical blade; 222. Second helical blade; 23. Central shaft; 3. Oil-water separator; 4. Pressure reducing valve; 5. Washing liquid tank; 61. First delivery pump; 62. Second delivery pump; A1. First feed pipe; A2. Second feed pipe; B1. First discharge pipe; B2. Second discharge pipe; C1. First connecting pipe; C2. Second connecting pipe. Detailed Implementation

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0035] Example 1

[0036] Reference Figure 1-9 This embodiment provides a material washing unit, including a feed pipe, a pressurizing mixing device 1, a static mixer 2, a connecting pipe, an oil-water separator 3, and a discharge pipe. The pressurizing mixing device 1 is disposed on the feed pipe and is used for pressurizing and mixing the material and the washing liquid. The static mixer 2 consists of a pipe-shaped housing 21 and a stationary element fixedly disposed inside the housing 21. The stationary element includes at least one spiral blade penetrating the static mixer, and the spiral direction of the spiral blade is continuous. The static mixer 2 is connected to the outlet end of the pressurizing mixing device 1 through the connecting pipe for thorough washing of the material and reduction of emulsification. The oil-water separator 3 is connected to the outlet end of the static mixer 2 through the connecting pipe, and the outlet end of the oil-water separator 3 is connected to the discharge pipe.

[0037] In this embodiment, the feed pipeline includes a first feed pipeline A1 for conveying materials and a second feed pipeline A2 for conveying washing liquid. Both the first feed pipeline A1 and the second feed pipeline A2 are connected to the pressurizing and mixing device 1, so that the materials and washing liquid are respectively conveyed to the pressurizing and mixing device 1 through the first feed pipeline A1 and the second feed pipeline A2, and the pressurizing and mixing device 1 pressurizes and mixes the materials and washing liquid. The connecting pipeline includes a first connecting pipeline C1 and a second connecting pipeline C2. A static mixer 2 is installed on the right side of the pressurizing and mixing device 1. The outlet end is connected to the inlet end of the static mixer 2 via the first connecting pipe C1, so that the material and washing liquid initially mixed in the pressurized mixing device 1 can enter the static mixer 2. The static mixer 2 consists of a pipe-shaped shell 21 and a stationary element fixedly installed inside the shell 21. The stationary element includes at least one spiral blade penetrating the static mixer. The spiral direction of the spiral blade is continuous, so that the material can be thoroughly washed and emulsified by the static mixer 2. An oil-water separator 3 is installed on the right side of the static mixer 2. The outlet end of the static mixer 2 is connected to the oil... The inlet end of the water separator 3 is connected to the top, and the discharge pipeline includes a first discharge pipeline B1 and a second discharge pipeline B2. Two outlet ends are provided at the bottom of the oil-water separator 3. One outlet end is connected to the first discharge pipeline B1 so that the oil phase separated from the oil-water separator 3 can be discharged through the first discharge pipeline B1. The other outlet end is connected to one end of the second discharge pipeline B2 so that the water phase separated from the oil-water separator 3 can be discharged through the second discharge pipeline B2. The existing static mixer 2 is configured with a left-handed and a right-handed rotation to improve the mixing effect. Although this configuration can achieve thorough washing... However, the washing mixture is severely emulsified, and insoluble impurities such as organic salts easily accumulate at the connection between the left-hand and right-hand rotating elements, leading to blockage. Therefore, this embodiment reduces the emulsification and blockage of the washing mixture by using a continuous spiral channel, and further improves the washing effect by using a pressurized mixing device. This not only improves the production efficiency of material washing, but also reduces the volume of the oil-water separator 3. It should be noted that the pressurized mixing device and the static mixer in this embodiment are composed of multiple structures, and the pressurized mixing device and the static mixer can be arbitrarily combined according to actual usage requirements.

[0038] Furthermore, a pressure reducing device is installed on the connecting pipeline between the static mixer 2 and the oil-water separator 3.

[0039] In this embodiment, a pressure reducing device is installed on the second connecting pipeline C2 between the static mixer 2 and the oil-water separator 3 to reduce pressure, thereby achieving better oil-water separation efficiency. While taking into account ease of use, the pressure reducing device in this embodiment can be a pressure reducing valve 4.

[0040] During operation, the material and washing liquid are conveyed to the pressurized mixing device 1 through the first feed pipe A1 and the second feed pipe A2, respectively. The front end of the first feed pipe A1 is connected to the material conveying pump (not shown in the figure). The pressurized mixing device 1 can achieve preliminary mixing of the material and washing liquid. The mixed liquid is conveyed to the static mixer 2 through the first connecting pipe C1. The static mixer 2 thoroughly washes the material. The washed liquid is conveyed to the oil-water separator 3 through the second connecting pipe C2. During this process, the pressure reducing valve 4 on the second connecting pipe C2 can reduce the pressure of the liquid. After the oil and water are separated in the oil-water separator 3, the oil phase is discharged through the first discharge pipe B1, and the water phase is discharged through the second discharge pipe B2.

[0041] Example 2

[0042] Reference Figure 2 and Figure 3 This embodiment is based on Embodiment 1 and is used for washing materials with water.

[0043] Specifically, the pressurized mixing device 1 is a pressurized pipeline, which includes a three-way pipeline 13, a first pressurizing element, and a second pressurizing element. The first pressurizing element and the second pressurizing element are a first pressurizing valve 11 and a second pressurizing valve 12, respectively. The first pressurizing valve 11 is located at the first port of the three-way pipeline 13. The material enters the three-way pipeline 13 through the feed pipeline and the first pressurizing valve 11. The second pressurizing valve 12 is located at the second port of the three-way pipeline 13. Water enters the three-way pipeline 13 through the feed pipeline and the second pressurizing valve 12. The third port of the three-way pipeline 13 is connected to the inlet end of the static mixer 2 through a connecting pipeline.

[0044] In this embodiment, the pressurized mixing device 1 is a pressurized pipeline, which mainly consists of a three-way pipe 13, a first pressurized valve 11, and a second pressurized valve 12. The first pressurized valve 11 is installed at the first port of the three-way pipe 13. The inlet end of the first pressurized valve 11 is connected to the first feed pipe A1 so that the material enters the three-way pipe 13 after being pressurized by the first pressurized valve 11 through the first feed pipe A1. The second pressurized valve 12 is installed at the second port of the three-way pipe 13. The inlet end of the second pressurized valve 12 is connected to the second feed pipe A2 so that water enters the three-way pipe 13 through the second feed pipe A2 and the second pressurized valve 12 to perform preliminary mixing with the material. The pressurized valve increases the flow rate of the material and water, thereby increasing the mixing power and improving the mixing effect of the material and water. The third port of the three-way pipe 13 serves as the outlet of the entire pressurized mixing device 1, and it is connected to the inlet end of the static mixer 2 through the first connecting pipe C1.

[0045] Specifically, the stationary element consists of a central shaft 23 and a first helical blade 221. The central shaft 23 is fixedly installed inside the housing 21, and the first helical blade 221 is fixedly installed on the central shaft 23.

[0046] The static mixer 2 in this embodiment mainly consists of a housing 21, a central shaft 23, and a first helical blade 221. The housing 21 has a cylindrical structure and serves as the mounting base for the static mixer 2. The central shaft 23 is fixedly installed in the center of the housing 21, and a first helical blade 221 with the same helical direction is fixedly installed on the central shaft 23. The length of the first helical blade 221 is the same as the length of the central shaft 23 to ensure sufficient washing length. The central shaft 23 and the first helical blade 221 constitute the helical component of the static mixer 2. The gap between the first helical blade 221, the central shaft 23, and the housing 21 forms a helical channel, allowing the mixture to flow continuously along the helical channel. The continuous spiral channel is connected at one end to the inlet of the static mixer 2 and at the other end to the outlet of the static mixer 2. In this embodiment, the static mixer 2 adopts a fixed continuous spiral channel setting, which ensures that the material can be fully mixed and washed while reducing the occurrence of emulsification in the washing mixture, avoiding scaling and clogging, and reducing the problem of excessively long oil-water separation time caused by emulsification. This saves oil-water separation time and facilitates the timely discharge of the fully separated material from the oil-water separator 3, thereby reducing the volume of the oil-water separator 3 by 30% (compared to the volume of the oil-water separator 3 matched with the SK type static mixer), saving equipment costs and space occupied by the equipment.

[0047] In use, the material in the first feed pipe A1 and the water in the second feed pipe A2 enter the three-way pipe 13 through the first pressure-boosting valve 11 and the second pressure-boosting valve 12 respectively for pressurization and mixing. Then, the material enters the static mixer 2 through the first connecting pipe C1 from the third port of the three-way pipe 13 for thorough water washing. Then, it enters the oil-water separator 3 through the second connecting pipe C2 for oil-water separation. The oil phase is discharged through the first discharge pipe B1, and the water phase is discharged through the second discharge pipe B2.

[0048] Example 3

[0049] Reference Figure 4 and Figure 5 This embodiment is based on embodiment 1, and the difference between this embodiment and embodiment 2 is the structure of the pressurized mixing device 1 and the static mixer 2, which are used to perform alkaline washing on the materials.

[0050] Specifically, the pressurized mixing device 1 is a jet mixer, which is provided with a jet inlet 14 and a side suction port 15. The alkali solution enters the jet mixer through the feed pipe and the jet inlet 14, and the material enters the jet mixer through the feed pipe and the side suction port 15. The outlet end of the jet mixer is connected to the inlet end of the static mixer 2 through a connecting pipe. The static element is the first spiral blade 221, which is fixedly installed in the housing 21.

[0051] In this embodiment, the pressurized mixing device 1 is a jet mixer, which is provided with a jet inlet 14 and a side suction inlet 15. The jet inlet 14 is the first pressurized inlet, and the side suction inlet 15 is the second pressurized inlet. The second feed pipe A2 is connected to the first pressurized inlet, and the first feed pipe A1 is connected to the second pressurized inlet. In this embodiment, the jet mixer increases the pressure of the alkali fluid by increasing the flow rate of the alkali solution. The high flow rate drives the material to self-suction and generate a collision mixing effect, which can further improve the dispersion of the material in the alkali solution and the effective contact area between the material and the alkali solution, improve the mixing effect of the material and the alkali solution, and thus improve the production efficiency of alkali washing.

[0052] The static mixer 2 is mainly composed of a shell 21 and a first spiral blade 221 with the same spiral direction. The first spiral blade 221 is fixedly installed inside the shell 21. The length of the first spiral blade 221 is the same as the inner cavity length of the static mixer 2 to ensure sufficient alkaline washing length. The first spiral blade 221 constitutes the spiral component of the static mixer 2. The gap between the first spiral blade 221 and the shell 21 forms a spiral channel to reduce emulsification and clogging problems. As a result, the volume of the oil-water separator 3 can be reduced by 35% (compared to the volume of the oil-water separator 3 matched with the SK type static mixer), saving equipment costs and space occupied by the equipment.

[0053] In use, the alkali solution in the second feed pipe A2 is sprayed out at high speed through the first pressurization inlet, creating a negative pressure in the spray mixer cavity to transport the material in the first feed pipe A1 to the second pressurization inlet. The material and alkali solution are pressurized and mixed in the spray mixer cavity, and then enter the static mixer 2 from the outlet end of the spray mixer through the first connecting pipe C1 for thorough alkali washing. Then, it enters the oil-water separator 3 through the second connecting pipe C2 for oil-water separation. The oil phase is discharged through the first discharge pipe B1, and the water phase is discharged through the second discharge pipe B2.

[0054] Example 4

[0055] Reference Figure 6 and Figure 7This embodiment is based on embodiment 1, and the difference between this embodiment and embodiments 2 and 3 is the structure of the pressurized mixing device 1 and the static mixer 2, which are used to perform alkaline washing on the materials.

[0056] Specifically, the pressurized mixing device 1 is a pressurized pipeline equipped with a pressurized pump, which includes a three-way pipeline 13, a first pressurized element, and a second pressurized element. The first pressurized element and the second pressurized element are a first pressurized pump 16 and a second pressurized pump 17, respectively. The first pressurized pump 16 is located at the first port of the three-way pipeline 13. The material enters the three-way pipeline 13 through the feed pipeline via the first pressurized pump 16. The second pressurized pump 17 is located at the second port of the three-way pipeline 13. The alkali solution enters the three-way pipeline 13 through the feed pipeline via the second pressurized pump 17. The third port of the three-way pipeline 13 is connected to the inlet end of the static mixer 2 through a connecting pipeline. The static element consists of a first helical blade 221 and a second helical blade 222. The first helical blade 221 and the second helical blade 222 are fixedly arranged in parallel within the housing 21, and the helical directions of the first helical blade 221 and the second helical blade 222 are the same.

[0057] In this embodiment, the pressurized mixing device 1 is a pressurized pipeline equipped with a pressurized pump. It mainly consists of a three-way pipe 13, a first pressurized pump 16, and a second pressurized pump 17. The first pressurized pump 16 is installed at the first port of the three-way pipe 13, and the first feed pipe A1 is connected to the first pressurized pump 16, allowing material to enter the three-way pipe 13 through the first feed pipe A1 and the first pressurized pump 16. The second pressurized pump 17 is installed at the second port of the three-way pipe 13, and the second feed pipe A2 is connected to... The second booster pump 17 is connected so that the alkali solution can enter the three-way pipe 13 through the second feed pipe A2 and the second booster pump 17 to be initially mixed with the material. The third port of the three-way pipe 13 serves as the outlet of the entire booster mixing device 1, and it is connected to the inlet of the static mixer 2 through the first connecting pipe C1. In this embodiment, by adding a booster pump to the three-way pipe 13, the boosting effect and mixing power of the booster mixing device 1 are improved, thereby improving the mixing effect of the material and the alkali solution.

[0058] The static mixer 2 mainly consists of a shell 21, a first helical blade 221, and a second helical blade 222. The first helical blade 221 and the second helical blade 222 are fixedly installed in parallel inside the shell 21, and the helical directions of the first helical blade 221 and the second helical blade 222 are consistent. The lengths of the first helical blade 221 and the second helical blade 222 are the same as the inner cavity length of the static mixer 2 to ensure sufficient alkali washing length. The first helical blade 221 and the second helical blade 222 constitute the helical component of the static mixer 2. The gap between the first helical blade 221, the second helical blade 222 and the shell 21 forms a helical channel. The double helical blades provide three continuous helical channels for the mixed material, which can further reduce the occurrence of emulsification. As a result, the volume of the oil-water separator 3 can be reduced by 40% (compared to the volume of the oil-water separator 3 matched with the SK type static mixer), saving equipment costs and space occupied by the equipment.

[0059] In use, the first booster pump 16 delivers the material through the first feed pipe A1 to the three-way pipe 13, and the second booster pump 17 delivers the alkali solution through the second feed pipe A2 to the three-way pipe 13. After pressurization and mixing, the mixed solution enters the static mixer 2 from the third port of the three-way pipe 13 through the first connecting pipe C1 for thorough alkali washing. Then, after depressurization through the pressure reducing valve 4 on the second connecting pipe C2, it enters the oil-water separator 3 for oil-water separation. The oil phase is discharged through the first discharge pipe B1, and the water phase is discharged through the second discharge pipe B2.

[0060] Example 5

[0061] Reference Figure 8 and Figure 9 This embodiment is based on embodiment 1, and the difference between this embodiment and embodiments 2, 3 and 4 is the structure of the pressurized mixing device 1 and the static mixer 2, which are used to perform alkaline washing on the materials.

[0062] Specifically, the pressurized mixing device 1 is a collision mixer, which includes a mixing chamber and a nozzle. The nozzle is located in the mixing chamber, and the material and alkali solution enter the mixing chamber through the nozzle via the feed pipe. The stationary element consists of a central shaft 23, a first spiral blade 221, and a second spiral blade 222. The central shaft 23 is fixedly installed inside the housing 21, and the first spiral blade 221 and the second spiral blade 222 are fixedly installed parallel to each other on the central shaft 23.

[0063] In this embodiment, the pressurized mixing device 1 is a collision mixer, which mainly consists of a mixing chamber and two nozzles. The two nozzles are a first nozzle 18 and a second nozzle 19, and the included angle between the centerlines of the first nozzle 18 and the second nozzle 19 is 180°. The first nozzle 18 serves as the first pressurized inlet and is connected to the first feed pipe A1 so that the material in the first feed pipe A1 enters the mixing chamber through the first nozzle 18. The second nozzle 19 serves as the second pressurized inlet and is connected to the second feed pipe A2 so that the alkali in the second feed pipe A2 enters the mixing chamber through the first nozzle 18. The liquid enters the mixing chamber through the second nozzle 19 and is initially mixed with the material. The pressurized mixing device 1 uses a collision mixer to further reduce the dispersed particle size of the material, making the alkali washing more thorough. It should be noted that this embodiment does not limit the specific number of nozzles. In other embodiments, the number of nozzles can also be four, with the included angle between two adjacent nozzles being 90°. Two of the nozzles are connected to the first pressurized inlet and the first feed pipe A1, and the other two nozzles are connected to the second pressurized inlet and the second feed pipe A2, so as to further improve the mixing effect of the material and the alkali solution.

[0064] The static mixer 2 mainly consists of a housing 21, a central shaft 23, a first helical blade 221, and a second helical blade 222. The central shaft 23 is fixedly installed inside the housing 21. The first helical blade 221 and the second helical blade 222 are fixedly installed parallel to each other on the central shaft 23. The helical directions of the first helical blade 221 and the second helical blade 222 are consistent, and the lengths of both the first helical blade 221 and the second helical blade 222 are the same as the length of the central shaft 23 to ensure sufficient alkali washing length. The spiral components that make up the static mixer 2, the first spiral blade 221, the second spiral blade 222, the central shaft 23 and the shell 21 form a spiral channel, which allows the material to flow continuously along the spiral channel. One end of the continuous spiral channel is connected to the inlet end of the static mixer 2 and the other end is connected to the outlet end of the static mixer 2, so as to reduce emulsification and avoid scaling and clogging. In this way, the volume of the oil-water separator 3 can be reduced by 50% (compared to the volume of the oil-water separator 3 matched with the SK type static mixer), saving equipment costs and space occupied by the equipment.

[0065] In use, the material in the first feed pipe A1 and the alkaline solution in the second feed pipe A2 are sprayed into the mixing chamber through the first nozzle 18 and the second nozzle 19, respectively. After being pressurized and mixed, the material flows from the outlet end of the collision mixer into the first connecting pipe C1 and is then transported to the static mixer 2 through the first connecting pipe C1 for thorough alkaline washing. After being depressurized by the pressure reducing valve 4 on the second connecting pipe C2, the material enters the oil-water separator 3 for oil-water separation. The oil phase is discharged through the first discharge pipe B1, and the water phase is discharged through the second discharge pipe B2.

[0066] Example 6

[0067] Reference Figure 8 This embodiment provides a recyclable material washing unit. This embodiment is based on embodiments 1-5 and can be applied to any of the above embodiments.

[0068] Specifically, a circulation device is installed on the discharge pipeline for recycling the washing liquid. The circulation device includes a washing liquid tank 5 and a transfer pump. The inlet end of the washing liquid tank 5 is connected to the water phase outlet end of the oil-water separator 3 through the discharge pipeline. The inlet end of the transfer pump is connected to the outlet end of the washing liquid tank 5 through a pipeline. The outlet end of the transfer pump is connected to the washing liquid inlet end of the pressurizing mixing device 1 through the feed pipeline.

[0069] The circulation device in this embodiment mainly consists of a washing liquid tank 5, a first transfer pump 61, and a second transfer pump 62. The washing liquid tank 5 is installed at the bottom of the oil-water separator 3. The inlet of the washing liquid tank 5 is connected to the water phase outlet of the oil-water separator 3 via a second discharge pipe B2. The inlet of the first transfer pump 61 is connected to the outlet of the washing liquid tank 5 via a pipe, and the outlet of the first transfer pump 61 is connected to the washing liquid inlet of the pressurized mixing device 1 via a second feed pipe A2, so that the first transfer pump 61 can transport the washing liquid in the washing liquid tank 5 to the pressurized mixing device 1. Inside, a second delivery pump 62 can be installed on the first connecting pipeline C1 between the pressurized mixing device 1 and the static mixer 2. This pump can quickly deliver the mixture of the pre-mixed material and the washing liquid into the static mixer 2, thereby improving the production efficiency of material washing. In this embodiment, the washing liquid tank 5 and the delivery pump cooperate with each other to realize the recovery, storage and circulation of the aqueous phase after washing, thereby realizing the recycling of the washing liquid. It should be noted that this embodiment does not limit the specific number of delivery pumps. The number of delivery pumps in the circulation device can be selected according to the actual usage requirements.

[0070] In use, the material and washing liquid are conveyed to the pressurized mixing device 1 through the first feed pipe A1 and the second feed pipe A2, respectively. The front end of the first feed pipe A1 is connected to the material conveying pump (not shown in the figure). The pressurized mixing device 1 can realize the initial mixing of the material and washing liquid. The mixed liquid is conveyed to the static mixer 2 through the first connecting pipe C1. The static mixer 2 thoroughly washes the material. The washed liquid is conveyed to the oil-water separator 3 through the second connecting pipe C2. After the oil and water are separated in the oil-water separator 3, the oil phase is discharged through the first discharge pipe B1, and the water phase enters the washing liquid tank 5 through the second discharge pipe B2. The washing liquid in the washing liquid tank 5 is conveyed to the pressurized mixing device through the first conveying pump 61 and the second feed pipe A2 to realize the recycling of the washing liquid.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A material washing unit, characterized in that: The system includes a feed pipeline, a pressurizing and mixing device (1), a static mixer (2), a connecting pipeline, an oil-water separator (3), and a discharge pipeline. The pressurizing and mixing device (1) is located on the feed pipeline and is used for pressurizing and mixing the material and the washing liquid. The static mixer (2) consists of a pipe-shaped shell (21) and a stationary element fixed inside the shell (21). The stationary element includes at least one spiral blade that penetrates the static mixer (2). The spiral direction of the spiral blade is continuous. The static mixer (2) is connected to the outlet end of the pressurizing and mixing device (1) through the connecting pipeline and is used for thorough washing of the material and reduction of emulsification. The oil-water separator (3) is connected to the outlet end of the static mixer (2) through the connecting pipeline. The outlet end of the oil-water separator (3) is connected to the discharge pipeline.

2. The material washing unit as described in claim 1, characterized in that, The stationary element consists of a central shaft (23) and a first helical blade (221). The central shaft (23) is fixedly installed inside the housing (21), and the first helical blade (221) is fixedly installed on the central shaft (23).

3. The material washing unit according to claim 1, characterized in that, The stationary element consists of a central shaft (23), a first helical blade (221), and a second helical blade (222). The central shaft (23) is fixedly installed inside the housing (21), and the first helical blade (221) and the second helical blade (222) are fixedly installed parallel to each other on the central shaft (23).

4. The material washing unit according to claim 1, characterized in that, The stationary element is the first helical blade (221), which is fixedly disposed inside the housing (21).

5. The material washing unit according to claim 1, characterized in that, The stationary element consists of a first helical blade (221) and a second helical blade (222). The first helical blade (221) and the second helical blade (222) are fixedly arranged in parallel inside the housing (21), and the helical directions of the first helical blade (221) and the second helical blade (222) are the same.

6. The material washing unit as described in any one of claims 1 to 5, characterized in that: The pressurized mixing device (1) is a pressurized pipeline, which includes a three-way pipeline (13), a first pressurizing element and a second pressurizing element. The first pressurizing element is located at the first port of the three-way pipeline (13). The material enters the three-way pipeline (13) through the feed pipeline and the first pressurizing element. The second pressurizing element is located at the second port of the three-way pipeline (13). The washing liquid enters the three-way pipeline (13) through the feed pipeline and the second pressurizing element. The third port of the three-way pipeline (13) is connected to the inlet end of the static mixer (2) through a connecting pipeline.

7. The material washing unit as described in any one of claims 1 to 5, characterized in that: The pressurized mixing device (1) is a jet mixer. The jet mixer is provided with a jet inlet (14) and a side suction port (15). The washing liquid enters the jet mixer through the jet inlet (14) via the feed pipe. The material enters the jet mixer through the side suction port (15) via the feed pipe. The outlet end of the jet mixer is connected to the inlet end of the static mixer (2) via a connecting pipe.

8. The material washing unit as described in any one of claims 1 to 5, characterized in that: The pressurized mixing device (1) is a collision mixer, which includes a mixing chamber and a nozzle. The nozzle is located in the mixing chamber, and the material and washing liquid enter the mixing chamber through the nozzle via the feed pipe.

9. The material washing unit as described in any one of claims 1 to 5, characterized in that: The discharge pipeline is equipped with a circulation device for recycling the washing liquid. The circulation device includes a washing liquid tank (5) and a delivery pump. The inlet end of the washing liquid tank (5) is connected to the water phase outlet end of the oil-water separator (3) through the discharge pipeline. The inlet end of the delivery pump is connected to the outlet end of the washing liquid tank (5) through a pipeline. The outlet end of the delivery pump is connected to the washing liquid inlet end of the pressurizing mixing device (1) through the feed pipeline.

10. The material washing unit as described in claim 1, characterized in that: A pressure reducing device is installed on the connecting pipeline between the static mixer (2) and the oil-water separator (3).

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