Rotational flow extraction device

Abstract

The utility model provides a rotational flow extraction device, which belongs to the technical field of extraction equipment and comprises a straight pipe section, a reducing section, a connecting section and an annular screen, the straight pipe section is of a tubular structure with one closed end and the other open end, and the closed end is provided with an overflow port; the straight pipe section is provided with a first feed port which is tangentially arranged, the inner diameter in the reducing section is gradually reduced from the first end to the second end, and an outlet of the second end is an underflow port; the connecting section is of a hollow tubular structure, one end of the connecting section is connected with the end, away from the overflow opening, of the straight pipe section, the other end of the connecting section is connected with the end, away from the underflow opening, of the reducing section, and the connecting section is provided with a second feeding opening. The annular screen is arranged in the connecting section in a sleeved mode, and the two ends of the annular screen abut against the straight pipe section and the reducing section respectively. Light-phase fluid and heavy-phase fluid are separately fed, the heavy-phase fluid flows downwards in a rotational flow form after entering, and all the light-phase fluid can reach the center of equipment only after penetrating through the heavy-phase fluid, so that short circuit of the light-phase fluid is avoided, and the extraction effect can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of extraction equipment, specifically to a cyclone extraction device. BACKGROUND

[0002] As a conventional chemical separation technology, extraction utilizes the difference in distribution coefficient of solute between two immiscible liquid phases to purify or concentrate it. The extraction process includes two processes of mixing and separation of two-phase fluid. In an ideal extraction process, it is desirable that the two-phase fluid is mixed uniformly to increase the contact area and improve the mass transfer efficiency, and that the two phases are separated quickly after extraction. Cyclone extraction combines cyclone technology with extraction operation to achieve countercurrent mass transfer of two phases with different densities at a relatively high speed, which well meets the above-mentioned objectives.

[0003] Currently, there are various cyclone extraction devices. For example, CN201410175459.5 discloses a cyclone enhanced extraction device for heavy metal ions in wastewater. The two-phase fluid is first mixed, then further mixed by a spiral mixer, and finally sent to a spiral separator for two-phase separation. The whole process is long and the equipment is complex. Some devices directly mix the raw materials and then send them to a cyclone separator. As known, the fluid enters the separator in a cyclone manner at a high speed and with strong turbulence, which has a certain mixing effect. Therefore, the mixing and separation are achieved by cyclone action. For example, CN201611210759.8 discloses a three-phase cyclone extraction device. This type of device saves the front mixing device and makes the process simpler. However, the mixing and separation are performed simultaneously, the light and heavy phases enter the cyclone at the same time, part of the light phase is separated from the heavy phase at the inlet, the mixing degree is not strong, and the contact time is short, which leads to relatively poor overall mixing effect and further poor extraction effect. SUMMARY

[0004] To solve the above problems, the utility model provides a cyclone extraction device, which feeds the light phase fluid and the heavy phase fluid separately, so that the light phase fluid needs to pass through the heavy phase fluid completely to reach the middle position of the cyclone, and then overflow and discharge, which enables the light and heavy phases to mix fully and improves the extraction efficiency.

[0005] To achieve the above-mentioned purposes, the utility model provides the following solutions:

[0006] A cyclone extraction device, comprising:

[0007] A cyclone extraction tank, comprising:

[0008] The straight pipe section is a tubular structure with one end closed and the other end open, and the inner diameters of the straight pipe section are equal, and the closed end is provided with an overflow port.

[0009] The reduced-diameter section is a tubular structure with both ends open, and the reduced-diameter section includes a first end and a second end, the inner diameter of the reduced-diameter section gradually decreases from the first end to the second end, and the second end outlet is a underflow port.

[0010] The connecting section is a hollow tubular structure, one end of the connecting section is connected to the end of the straight pipe section away from the overflow port, the other end is connected to the end of the reduced-diameter section away from the underflow port, and the connecting section is provided with a second feed port.

[0011] The annular screen is sleeved in the connecting section, and the two ends of the annular screen abut against the straight pipe section and the reduced-diameter section respectively, so as to form an annular channel between the inner wall of the connecting section and the outer wall of the annular screen for the light phase fluid to flow through.

[0012] A first feed pump with an outlet communicating with the first feed port is used to transport the heavy phase fluid.

[0013] A second feed pump with an outlet communicating with the second feed port is used to transport the light phase fluid.

[0014] A light phase fluid product collection tank communicating with the overflow port;

[0015] A heavy phase fluid product collection tank communicating with the underflow port.

[0016] As a specific embodiment of the present application, the first feed port has at least two, and all the first feed ports are arranged in an annular array along the straight pipe section.

[0017] As a specific embodiment of the present application, the annular screen has two, and the two annular screens are coaxially arranged and spaced apart by a certain distance, so as to form an annular cavity between the two annular screens for accommodating the particulate material, and the particle size of the particulate material is greater than the screen hole on the annular screen.

[0018] Further, one end of the two annular screens is connected to each other by an annular plate.

[0019] As a specific embodiment of the present application, the height of the connecting section is less than the height of the annular screen, and the two ends of the connecting section are threadedly connected to the reduced-diameter section and the straight pipe section respectively.

[0020] Further, the outer wall of the connecting section is threadedly connected to the inner wall of the reduced-diameter section and the inner wall of the straight pipe section respectively, and a sealing ring is arranged at each end of the connecting section, one side of the sealing ring abuts against the end face of the connecting section, and the other side abuts against the inner wall of the reduced-diameter section or the inner wall of the straight pipe section.

[0021] As a specific embodiment of the utility model, still include circulating pump, the inlet of circulating pump is connected with heavy phase fluid product collecting tank bottom, the outlet is provided with two branch pipes, one branch pipe is connected with first feed pump outlet.

[0022] Compared with the prior art, the utility model has the advantages of:

[0023] The utility model discloses a light heavy phase fluid is arranged into feed pipe respectively, and the feed of heavy phase fluid is located above the feed of light phase fluid, and the heavy phase fluid flows downward in the form of cyclone after entering, and all light phase fluids must pass through heavy phase fluid to reach the center of equipment, thereby avoiding the short circuit of light phase fluid, can improve mixing effect, thereby improving the mass transfer efficiency of extraction, simultaneously, after the distribution of light heavy phase fluid, the flow velocity when two are contacted is not necessarily equal, and two are mixed in the mode of certain speed difference, this can further improve the uniformity of mixing, further improve the mass transfer efficiency of extraction, furthermore, annular screen net plays the role of distributor, and light phase fluid enters heavy phase fluid along each direction of circumference, this is favorable to the more uniform addition of light phase fluid into heavy phase fluid, also can improve mixing effect, improve the mass transfer efficiency of extraction, and the utility model discloses relative to prior art, can obviously improve extraction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the overall structure schematic diagram of a specific embodiment of the utility model cyclone extraction device;

[0025] Figure 2 It is Figure 1 It is the section view of cyclone extraction tank;

[0026] Figure 3 It is Figure 1 It is the plan view of cyclone extraction tank;

[0027] Figure 4 It is Figure 2 It is the layout drawing of first feed pipe;

[0028] Figure 5 It is Figure 2 It is the connection structure schematic diagram of two annular screen nets;

[0029] Figure 6 It is the schematic diagram of two annular screen nets;

[0030] In the drawing: cyclone extraction tank 100;First feed pump 200, second feed pump 300, extraction phase product collecting tank 400;Extraction agent storage tank 500;Extraction residual phase product collecting tank 600;Raw material liquid storage tank 700;Circulating pump 800;

[0031] Straight pipe section 110; reduced diameter section 120; connecting section 130; annular screen 140; granular material 150; sealing ring 160;

[0032] Overflow port 111; first feed port 112; underflow port 121; second feed port 131. DETAILED DESCRIPTION

[0033] The utility model will be further explained in detail in combination with the embodiments and drawings, but the implementation of the utility model is not limited to this.

[0034] Embodiment

[0035] The purpose of the utility model is to improve the degree of liquid-liquid mixing in the existing cyclone extractor, thereby improving the extraction efficiency. This embodiment is illustrated with raw material liquid and extractant. In this embodiment, the density of the raw material liquid is greater than that of the extractant. Therefore, the raw material liquid will be described as the heavy phase fluid, and the extractant will be described as the light phase fluid.

[0036] Please refer to Figures 1 to 5 , which shows the structure of a specific embodiment of the cyclone extraction device of the utility model. The cyclone extraction device of the utility model comprises a cyclone extraction tank 100, a first feed pump 200, a second feed pump 300, an extraction phase product collection tank 400, an extractant storage tank 500, an extraction residual phase product collection tank 600, a raw material liquid storage tank 700, and a circulating pump 800. Among them, the extractant storage tank 500 and the raw material liquid storage tank 700 store the extractant and the raw material liquid respectively, the first feed pump 200 and the second feed pump 300 respectively send the raw material of the raw material liquid storage tank 700 and the extractant storage tank 500 into the cyclone extraction tank 100 for extraction and separation operation, and form the extraction phase product and the extraction residual phase product after separation. The extraction phase product collection tank 400 and the extraction residual phase product collection tank 600 correspondingly collect the extraction phase product and the extraction residual phase product.

[0037] The cyclone extraction tank 100 of the utility model comprises a straight pipe section 110, a reduced diameter section 120, a connecting section 130, and an annular screen 140.

[0038] The straight pipe section 110 is a tubular structure with one end closed and the other end open, and its inner diameter remains consistent. An overflow port 111 is arranged at the closed end of the straight pipe section 110 as an overflow channel for the extraction phase. A first feed port 112 is arranged on the straight pipe section 110 along the tangent as a feed channel for the raw material liquid. The raw material liquid is fed along the tangent, so that it can form strong vortex motion, i.e. cyclone, in the straight pipe section 110 after entering the straight pipe section 110.

[0039] The reduced-diameter section 120 is a tubular structure with two open ends, including a first end and a second end opposite to the first end, and the inner diameter of the reduced-diameter section 120 gradually decreases from the first end to the second end, and the opening of the second end is a bottom flow port 121 for discharging the raffinate.

[0040] The connecting section 130 is a hollow tubular structure, one end of which is connected to the end of the straight pipe section 110 away from the overflow port 111, and the other end is connected to the end of the reduced-diameter section 120 away from the bottom flow port 121. The connecting section 130 is provided with a second feed port 131 as a feed port for the extractant. The annular screen 140 is coaxially arranged in the connecting section 130, and the two ends of the annular screen 140 abut against the straight pipe section 110 and the reduced-diameter section 120 respectively, so as to form an annular passage between the inner wall of the connecting section 130 and the outer wall of the annular screen 140 for the flow of the extractant.

[0041] In use, the raw material liquid forms a cyclone after entering the cyclone extractor and flows downward under the action of gravity, and the extractant needs to pass through the raw material liquid to be discharged outside through the overflow port 111, which can effectively avoid the short circuit of the extractant, so that the extractant and the raw material liquid are fully mixed, thereby improving the extraction efficiency. In the utility model, the extractant and the raw material liquid are fed separately, and the two feeding speeds are not necessarily equal, and the difference in feeding speed is also conducive to the mixing of the two, thereby further improving the extraction efficiency. At the same time, the annular screen 140 plays the role of a distributor, and the extractant enters the raw material liquid in each direction along the circumference, which is conducive to more uniformly adding the extractant to the raw material liquid, increasing the contact area between the extractant and the raw material liquid, thereby improving the mass transfer effect and improving the extraction efficiency.

[0042] In some embodiments, the first feed port 112 is provided with one, and in other embodiments, the first feed port 112 is provided with two or more, and all the first feed ports 112 are arranged in an annular array along the straight pipe section 110, which is conducive to enhancing the strength of the cyclone formed thereby, thereby enhancing the extraction efficiency.

[0043] In some embodiments, the annular screen 140 is one, but when the flow of the extractant is small, flow deviation is prone to occur, that is, part of the screen holes has high flow, and part of the screen holes has low flow, which is not conducive to full mixing. In view of this, in some embodiments, as shown in Figure 2 two annular screens 140 are provided, the two annular screens 140 are coaxially arranged and spaced apart by a certain distance, so as to form an annular cavity between the two annular screens 140 for accommodating the particulate material 150. The particle size of the particulate material 150 is greater than that of the screen holes on the annular screen 140, so as to use the gap between the solid particles as a fluid flow channel, which improves the flow resistance of the extractant and is conducive to improving the distribution effect, thereby improving the extraction efficiency. As for the particulate material 150, conventional fillers currently used in filters can be selected, such as modified quartz sand, anthracite particles, modified resin particles, etc.

[0044] Two annular screens 140 can be independent as shown in Figure 6 , or one end of the two annular screens 140 can be connected by an annular plate as shown in Figure 5 , that is, the distance between the two annular screens 140 is fixed by the annular plate, which facilitates installation.

[0045] Please refer to Figure 2 , the height of the connecting section 130 is less than the height of the annular screen 140. The outer wall of the connecting section 130 is respectively screwed with the inner wall of the reduced diameter section 120 and the inner wall of the straight pipe section 110, and a sealing ring 160 is arranged at both ends of the connecting section 130. One side of the sealing ring 160 abuts against the end face of the connecting section 130, and the other side abuts against the inner wall of the reduced diameter section 120 or the inner wall of the straight pipe section 110. In this way, the two ends of the annular screen 140 can be pressed against the reduced diameter section 120 and the straight pipe section 110 respectively, and at the same time, the sealing effect between the connecting section 130 and the reduced diameter section 120 and the straight pipe section 110 can be enhanced.

[0046] In addition, the cyclone extraction tank 100 mainly forms cyclone by the high speed of the raw material liquid when entering, and when the storage of the raw material liquid is insufficient, the extraction residual phase product can be backflowed to improve the speed of the raw material liquid entering the cyclone extraction tank 100, so a circulating pump 800 is arranged in the embodiment, the inlet of the circulating pump 800 is communicated with the bottom of the extraction residual phase product collecting tank 600, and the outlet is provided with two branch pipes, one of which is communicated with the outlet of the first feed pump 200, and the material of the other branch pipe is discharged. In order to facilitate the adjustment of flow, adjusting valves are arranged at the outlets of the first feed pump 200 and the circulating pump 800 respectively, and a flowmeter is arranged on the feed pipeline of the first feed inlet of the cyclone extraction tank 100.

[0047] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the embodiments of the present application, which should be covered within the protection scope of the present application.

Claims

1. A cyclonic extraction device, characterized by The application relates to a cyclone extraction tank. The cyclone extraction tank comprises: a straight pipe section which is a tubular structure with one end closed and the other end open, the inner diameter of the straight pipe section is equal, and an overflow port is arranged at the closed end; a tangential first feed inlet is arranged on the straight pipe section; a reduced-diameter section which is a tubular structure with both ends open, the reduced-diameter section comprises a first end and a second end, the inner diameter of the reduced-diameter section gradually decreases from the first end to the second end, and the second end is provided with an underflow port; a connecting section which is a hollow tubular structure, one end of the connecting section is connected to one end of the straight pipe section away from the overflow port, the other end of the connecting section is connected to one end of the reduced-diameter section away from the underflow port, and the connecting section is provided with a second feed inlet; an annular screen which is sleeved in the connecting section, two ends of the annular screen abut against the straight pipe section and the reduced-diameter section respectively, so that an annular channel is formed between the inner wall of the connecting section and the outer wall of the annular screen; a first feed pump with an outlet communicating with the first feed inlet, used for conveying a heavy phase fluid; a second feed pump with an outlet communicating with the second feed inlet, used for conveying a light phase fluid; a light phase fluid collecting tank communicating with the overflow port; a heavy phase fluid collecting tank communicating with the underflow port.

2. The cyclonic extraction device of claim 1, wherein The first feed inlet is at least two, and all the first feed inlets are arranged in an annular array along the straight pipe section.

3. The cyclonic extraction device of claim 1, wherein The annular screen is two, the two annular screens are coaxially arranged and spaced apart at a certain distance, so that an annular cavity is formed between the two annular screens for accommodating a particulate material, and the particle size of the particulate material is greater than the screen hole of the annular screen.

4. The cyclonic extraction device of claim 3, wherein, One end of the two annular screens is connected to each other through an annular plate.

5. The cyclonic extraction device of claim 1, wherein, The height of the connecting section is less than the height of the annular screen, and the two ends of the connecting section are threadedly connected to the reduced-diameter section and the straight pipe section respectively.

6. The cyclonic extraction arrangement of claim 5, wherein, The outer wall of the connecting section is threadedly connected to the inner wall of the reduced-diameter section and the inner wall of the straight pipe section respectively, and a sealing ring is arranged at each end of the connecting section, one side of the sealing ring abuts against the end face of the connecting section, and the other side of the sealing ring abuts against the inner wall of the reduced-diameter section or the inner wall of the straight pipe section.

7. The cyclonic extraction device of claim 1, wherein, The application further comprises a circulating pump, the inlet of the circulating pump is communicated with the bottom of the heavy phase fluid collecting tank, and the outlet of the circulating pump is provided with two branch pipes, one of which is communicated with the outlet of the first feed pump.

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