Multi-channel spiral plate heat exchanger for waste oil extraction

Abstract

The utility model discloses a multi-channel spiral plate heat exchanger for waste oil extraction, which comprises a spiral body, the spiral body is formed by winding a spiral plate, the outermost side of the spiral body is connected with a connecting port, the upper part and the lower part of the spiral body are sealed by end covers, a tubular mixer is arranged in the spiral body, and four isolation pieces are arranged on the outer side of the mixer. A liquid inlet is formed in the side edge of the closed end of the mixer, liquid inlets are correspondingly formed in the two alternate channels, a medium passes through the two alternate channels and then enters the mixer through the liquid inlets, openings are formed in the upper portions of the other two alternate channels, sleeves are arranged at the openings, and extension pipes are arranged on the sleeves. Wherein an extraction solvent and waste oil are introduced into two alternate channels, and a heat exchange medium is introduced into the other two channels, so that the temperatures of the waste oil and the extraction solvent are the same, the extraction effect is improved, and meanwhile, the mixer is combined with the heat exchanger to effectively shorten the pipeline length and reduce the cost of a delivery pump.

Description

Technical Field

[0001] The utility model relates to the technical field of waste oil recovery and utilization, in particular to a multi-channel spiral plate heat exchanger for waste oil extraction. Background Art

[0002] Extraction is a method of extracting and separating the desired substance from a solid or liquid mixture according to its characteristics using a solvent. When applied to the field of waste oil recovery, the asphalt component in the waste oil can be removed by mixing the extraction solvent with the waste oil after impurities are removed, and then the base oil component can be obtained. After subsequent desolventization treatment, pure base oil can be obtained for secondary recycling.

[0003] The extraction effects of extraction solvents are different at different temperatures. Therefore, before extraction, the waste oil to be extracted and the extraction solvent need to be kept at a certain temperature through a heat exchanger. Therefore, the waste oil and the extraction solvent need to be heated and insulated at the same time by the heat exchanger, and then mixed. In the process of transporting the waste oil and the extraction solvent through the heat exchanger to the mixer through pipelines, heat will be lost and the temperature will drop. This cooling is more obvious in winter, which will affect the extraction effect. Utility Model Content

[0004] (I) Technical solution

[0005] In order to solve the above technical problems, the utility model provides a multi-channel spiral plate heat exchanger for waste oil extraction.

[0006] The specific technical solutions are:

[0007] A multi-channel spiral plate heat exchanger for waste oil extraction comprises a spiral body, which is formed by winding four spiral plates, two adjacent plates form a channel for medium to pass through, and a total of four channels are formed. The four plates are connected to the outermost parts of the spiral body with connecting ports, and there are four connecting ports, which correspond to the outer ends of the four plates respectively. The upper and lower parts of the spiral body are sealed with end covers, and a tubular mixer is arranged inside the spiral body. Four isolation plates are arranged on the outer side of the mixer, and the four isolation plates correspond to the inner ends of the four plates. One end of the mixer extends to the outside of the spiral body, and the other end face is closed, and a liquid inlet is arranged on the side of the closed end of the mixer, and the two alternate channels are correspondingly provided with liquid inlets. After passing through the two alternate channels, the medium enters the mixer through the liquid inlet, and the other two alternate channels are opened at the top, and a sleeve is arranged at the opening, and an extension pipe is arranged on the sleeve.

[0008] Furthermore, the mixer is a static mixer, and a plurality of mixing plates are arranged inside the mixer, and the plurality of mixing plates are arranged at equal intervals.

[0009] Furthermore, the torsion angle of each mixing sheet is 90 degrees, the adjacent end sections of two adjacent mixing sheets are cross-shaped, and the spiral directions of two adjacent mixing sheets are opposite.

[0010] Furthermore, the connection port is arranged tangentially along the plate spiral, and the four connection ports are fixed at equal angles to the outer side of the spiral body.

[0011] Furthermore, flanges are provided on the extension pipe and the connection port.

[0012] Furthermore, the end cover is connected to the lower part of the spiral body by bolts, and an annular first reinforcing rib and a second reinforcing rib with an arched cross-section are provided on the outer side of the end cover, and the second reinforcing ribs are multiple and arranged at equal angles.

[0013] Furthermore, a distance column is provided on the inner side of the plate, the cross section of the distance column along the length direction is a rhombus, and the distance columns are arranged in an equilateral triangle.

[0014] (II) Beneficial effects

[0015] Compared with the prior art, the technical solution proposed by the utility model has the following advantages:

[0016] (1) Four channels are used simultaneously, with the two alternate channels introducing the extraction solvent and waste oil, and the other two channels introducing the heat exchange medium, which can ensure that the waste oil and the extraction solvent have the same temperature, thus improving the extraction effect;

[0017] (2) The heated extraction solvent and waste oil are directly mixed in the mixer to ensure sufficient mixing without heat loss, which can effectively ensure the extraction effect. At the same time, the combination of the mixer and the heat exchanger can effectively shorten the pipeline length and reduce the cost of the delivery pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the structure of a spiral plate heat exchanger;

[0020] Figure 2 This is a schematic diagram of the structure after the lower end cover is removed;

[0021] Figure 3 It is a schematic diagram of the structure of the mixer and the mixing piece;

[0022] Figure 4It is a schematic diagram of the connection between the end cap and the spiral body;

[0023] Figure 5 This is the plate unfolding diagram;

[0024] In the figure: 1-plate, 2-connecting port, 3-end cover, 4-mixer, 5-spacer, 6-casing, 7-extension pipe, 8-mixing plate, 9-flange, 10-first reinforcing rib, 11-second reinforcing rib, 12-distance column. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. The described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the related prior art, the extraction effects of the extraction solvent at different temperatures are different. Therefore, before extraction, the waste oil to be extracted and the extraction solvent need to be kept at a certain temperature through a heat exchanger. Therefore, the waste oil and the extraction solvent need to be heated and insulated by the heat exchanger at the same time, and then mixed. In the process of transporting the waste oil and the extraction solvent through the heat exchanger to the mixer through the pipeline, heat will be lost and the temperature will drop. This cooling is more obvious in winter, which will affect the extraction effect.

[0027] In order to solve the problems existing in the related prior art, the utility model proposes a multi-channel spiral plate heat exchanger for waste oil extraction. The principle and structure of the utility model are described in detail below in conjunction with the drawings and embodiments.

[0028] Embodiment 1

[0029] See also Figures 1 to 3The utility model proposes a multi-channel spiral plate heat exchanger for waste oil extraction, including a spiral body, which is formed by winding four spiral plates 1, and two adjacent plates 1 form a channel for medium to pass through. Specifically, the four plates are wound to form four channels, and the end of the plate located on the inner side of the spiral body formed by winding is defined as the inner end, and the outer side is defined as the outer end. The outer ends of the four plates 1 are connected with connecting ports 2, and each plate 1 corresponds to a connecting port, that is, there are four connecting ports 2, which correspond to the outer ends of the four plates 1 respectively. The upper and lower parts of the spiral body are sealed with end covers 3, and a tubular mixer 4 is provided inside the spiral body. Four isolation sheets 5 are provided on the outer side of the mixer 4. The four isolation sheets 5 are provided on the outer side of the mixer 4. The sheet 5 corresponds to the inner ends of the four plates 1, one end of the mixer 4 extends to the outside of the spiral body, and the other end face is closed, and a liquid inlet is provided on the side of the closed end of the mixer 4, and the liquid inlet is correspondingly provided on the two alternate channels. The medium enters the mixer 4 through the liquid inlet after passing through the two alternate channels. The upper parts of the other two alternate channels are open, and a sleeve 6 is provided at the opening, and an extension tube 7 is provided on the sleeve 6, so that a total of four channels are formed, the outer ends of the two alternate spiral channels are connected to the connection port 2, and the inner sides are connected to the inside of the mixer 4 through the liquid inlet, and the outer sides of the other two alternate spiral channels are connected to the other two connection ports 2, and the inner sides are connected to the sleeve 6 and the extension tube 7 through the upper opening.

[0030] The specific working principle is as follows: the extension pipe 7 is connected to the heat exchange medium discharge port, the two connection ports 2 connected to the extension pipe 7 are connected to the heat exchange medium return pipe, and the other two connection ports 2 are respectively connected to the extraction solvent outlet pipe and the waste liquid pipe outlet pipe, and the upper end of the mixer 4 is connected to the separation tank. In this way, when in use, the extraction solvent and waste oil enter the heat exchanger through the two connection ports, flow from the outside to the inside, pass through the two spiral channels, and then enter the mixer 4 through the liquid inlet for mixing, and finally enter the separation tank, while the heat exchange medium passes through the extension pipe 7 and The sleeve 6 enters the heat exchanger and flows from the inside to the outside, and is finally discharged from two corresponding connection ports. The four channels are used at the same time, and the two alternate channels are connected to the extraction solvent and the waste oil, and the other two channels are connected to the heat exchange medium, which can ensure that the waste oil and the extraction solvent have the same temperature, which is beneficial to improving the extraction effect; at the same time, the heated extraction solvent and waste oil are directly mixed in the mixer, without heat loss, which can effectively ensure the extraction effect. At the same time, the combination of the mixer and the heat exchanger can effectively shorten the pipeline length and reduce the cost of the delivery pump.

[0031] See also Figure 3The mixer 4 is a static mixer, and a plurality of mixing blades 8 are arranged inside the mixer 4. The mixing blades 8 are spiral-shaped, and the plurality of mixing blades 8 are arranged at equal intervals. At the same time, the torsion angle of each mixing blade 8 is 90 degrees, and the adjacent end sections of two adjacent mixing blades 8 are cross-shaped, that is, along the liquid flow direction, the tail of the previous mixing blade is horizontal, and the head end of the next mixing blade is vertical, and the spiral directions of the two adjacent mixing blades 8 are opposite. The plurality of mixing blades 8 with opposite rotating directions mix with each other, which can effectively mix inside the mixer 4, and at the same time can improve the mixing effect compared with the traditional simple spiral mixing blade.

[0032] See also Figure 1 The connection port 2 is arranged tangentially along the spiral of the plate 1, and the four connection ports 2 are fixed at equal angles on the outer side of the spiral body. Flanges 9 are provided on the extension pipe 7 and the connection port 2. The tangential arrangement of the connection port can effectively reduce the resistance of the liquid flow, and the flange structure is also more convenient to connect with other pipelines.

[0033] See also Figure 4 The end cover 3 is connected to the lower part of the spiral body by bolts. The outer side of the end cover 3 is provided with a first annular reinforcing rib 10 and a second reinforcing rib 11 with an arched cross section. The second reinforcing rib 11 is multiple and arranged at equal angles. Such a multiple reinforcing rib structure makes the whole end cover more evenly stressed. If it is only an ordinary plate, the side pressure will be greater than the middle pressure, which will easily cause leakage in the middle due to insufficient pressure.

[0034] See also Figure 5 A distance column 12 is provided on the inner side of the plate 1. The cross-section of the distance column 12 along the length direction is a rhombus. The arrangement direction of the distance column 12 is an equilateral triangle arrangement. The distance between one of the distance columns 12 and the surrounding adjacent distance columns is the same. This can ensure the supporting strength on the one hand, and reduce the resistance when the fluid flows on the other hand.

[0035] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multi-channel spiral plate heat exchanger for waste oil extraction, characterized in that: The invention comprises a spiral body, which is formed by winding four spiral plates (1), two adjacent plates (1) form a channel for medium to pass through, and a total of four channels are formed, and a connection port (2) is connected to the outermost part of the four plates (1) of the spiral body, and the connection ports (2) are four and correspond to the outer ends of the four plates (1), respectively, and the upper and lower parts of the spiral body are sealed with end caps (3), and a tubular mixer (4) is arranged inside the spiral body, and the outer side of the mixer (4) is provided with four partitions. The four isolation sheets (5) correspond to the inner ends of the four plates (1); one end of the mixer (4) extends to the outside of the spiral body, and the other end face is closed, and a liquid inlet is provided on the side of the closed end of the mixer (4); the two alternate channels are provided with liquid inlets, and the medium enters the mixer (4) through the liquid inlet after passing through the two alternate channels; the other two alternate channels are open at the top, and a sleeve (6) is provided at the opening, and an extension tube (7) is provided on the sleeve (6).

2. A multi-channel spiral plate heat exchanger for waste oil extraction according to claim 1, characterized in that: The mixer (4) is a static mixer. A plurality of mixing plates (8) are arranged inside the mixer (4), and the plurality of mixing plates (8) are arranged at equal intervals.

3. A multi-channel spiral plate heat exchanger for waste oil extraction according to claim 2, characterized in that: The twist angle of each mixing sheet (8) is 90 degrees, the adjacent end sections of two adjacent mixing sheets (8) are cross-shaped, and the spiral directions of the two adjacent mixing sheets (8) are opposite.

4. The multi-channel spiral plate heat exchanger for waste oil extraction according to claim 1, characterized in that: The connection port (2) is arranged tangentially along the spiral of the plate (1), and the four connection ports (2) are fixed at equal angles on the outer side of the spiral body.

5. The multi-channel spiral plate heat exchanger for waste oil extraction according to claim 1, characterized in that: The extension pipe (7) and the connection port (2) are both provided with flanges (9).

6. The multi-channel spiral plate heat exchanger for waste oil extraction according to claim 1, characterized in that: The end cover (3) is connected to the lower part of the spiral body by bolts. The outer side of the end cover (3) is provided with an annular first reinforcing rib (10) and a second reinforcing rib (11) with an arched cross section. The second reinforcing rib (11) is multiple and arranged at equal angles.

7. The multi-channel spiral plate heat exchanger for waste oil extraction according to claim 1, characterized in that: The inner side of the plate (1) is provided with a distance column (12), the section of the distance column (12) along the length direction is a rhombus, and the arrangement direction of the distance column (12) is an equilateral triangle arrangement.

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