Combined film evaporator

Abstract

The utility model discloses a combined film evaporator which at least comprises a first-stage film evaporator and a second-stage film evaporator which are used for evaporating materials, a material outlet of the first-stage film evaporator is connected with a material inlet of the second-stage film evaporator, and a vacuum outlet is formed in the first-stage film evaporator. Materials sequentially flow through the first-stage film evaporator and the second-stage film evaporator, the materials vaporized by the first-stage film evaporator flow out of the vacuum outlet, and the materials vaporized by the second-stage film evaporator flow back to the first-stage film evaporator and then flow out of the vacuum outlet. According to the combined type film evaporator, through multi-stage evaporation, evaporation materials and concentration materials can be separated conveniently, the organic solvent residual rate is reduced, and evaporation and concentration of different materials are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to thin film evaporator technical field especially relates to a combined thin film evaporator. BACKGROUND

[0002] High -efficient rotary thin film evaporator, it is a kind of " air knife " forced film formation by fixed rotary scraper high -speed rotation, can be carried out falling film evaporation under certain vacuum condition, new type high -efficient evaporator,

[0003] Patent CN209005225U discloses a kind of main evaporator and including the thin film evaporator of main evaporator, by multiple thin film evaporator connection, realize twice evaporation to feed liquid, guarantee that organic solvent in feed liquid can be fully separated, further improve the quality of finished feed liquid.But, for high viscosity, poor mobility, final product is solid, powder or semi-solid etc., since the mobility of concentrated material is poor, cannot flow, thereby leading to cannot be discharged from thin film evaporator cylinder, therefore this thin film evaporator even uses multiple level form, also cannot meet this working condition, cannot reach the demand of low organic solution residual rate. SUMMARY

[0004] The utility model solves the technical problems in prior art that thin film evaporator cannot meet complex working conditions, and provides a combined thin film evaporator, which separates evaporated material and concentrated material through multi-stage evaporation, reduces organic solution residual rate and meets evaporation and concentration of different materials.

[0005] The utility model solves the technical problems and adopts the technical scheme that a kind of combined thin film evaporator, at least including the first stage thin film evaporator and second stage thin film evaporator for evaporating material, the material outlet of the first stage thin film evaporator is connected with the material import of second stage thin film evaporator, vacuum outlet is equipped on the first stage thin film evaporator, material flows through first stage thin film evaporator and second stage thin film evaporator in sequence, material vaporized by first stage thin film evaporator flows out from vacuum outlet, material vaporized by second stage thin film evaporator flows back to first stage thin film evaporator and then flows out from vacuum outlet.

[0006] Further, to separate and collect concentrated material and evaporated material, the first stage thin film evaporator includes a first evaporation cylinder, a first jacket is provided in the first evaporation cylinder, the first jacket has a distributor inside, the first evaporation cylinder is provided with a first feed inlet above the distributor, and the first evaporation cylinder is provided with a first discharge outlet below the distributor.

[0007] Further, in order to separate and collect the concentrated material and the evaporated material, the secondary thin film evaporator comprises a second evaporation cylinder, a second jacket is arranged in the second evaporation cylinder, screw type paddles are arranged on the inner side of the second jacket, a second feeding port is arranged on the upper side of the second evaporation cylinder, and a second discharging port is arranged on the lower side of the second evaporation cylinder, and the second feeding port is connected with the first discharging port.

[0008] Further, in order to collect the evaporated material of the primary thin film evaporator and the secondary thin film evaporator, the vacuum outlet is arranged above the first feeding port.

[0009] Further, the first jacket and the second jacket are both provided with a jacket inlet and a jacket outlet for the flow of heat medium.

[0010] Further, in order to observe the actual running state in the evaporation cylinder, the first evaporation cylinder and the second evaporation cylinder are provided with sight glasses.

[0011] Further, the primary thin film evaporator is a vertical thin film evaporator, and the secondary thin film evaporator is a horizontal thin film evaporator.

[0012] Further, the primary thin film evaporator is connected above the secondary thin film evaporator.

[0013] Further, in order to meet the requirement of low organic solvent residue, a plurality of primary thin film evaporators and secondary thin film evaporators are connected in sequence.

[0014] Compared with the prior art, the thin film evaporator has the following beneficial effects:

[0015] 1. The thin film evaporator is connected with the primary thin film evaporator and the secondary thin film evaporator, so that the evaporated material and the concentrated material are separated, the evaporated material is collected, the organic solvent residue is reduced, and the evaporation and concentration of different materials are met.

[0016] 2. The primary thin film evaporator is a vertical thin film evaporator, the material can smoothly pass through the evaporation cylinder by utilizing the effect that the material gravity is greater than the material adhesion.

[0017] 3. The secondary thin film evaporator is a horizontal thin film evaporator, screw type paddles are used to transport high-viscosity materials, solids and semi-solids, and different working conditions are met. BRIEF DESCRIPTION OF DRAWINGS

[0018] The thin film evaporator will be further described below in combination with the drawings and embodiments.

[0019] Figure 1 FIG. 1 is a structural schematic view of the thin film evaporator;

[0020] Figure 2 Structure diagram of a primary thin film evaporator;

[0021] Figure 3 Structure diagram of a secondary thin film evaporator;

[0022] In the figure: 1, primary thin film evaporator, 11, first evaporation cylinder, 12, first jacket, 13, distributor, 14, first feed inlet, 15, first discharge outlet, 16, vacuum outlet, 17, sight glass, 2, secondary thin film evaporator, 21, second evaporation cylinder, 22, second jacket, 23, screw blade, 24, second feed inlet, 25, second discharge outlet. DETAILED DESCRIPTION

[0023] The utility model will be explained in further detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the utility model in a schematic manner, so they only show the structure related to the utility model.

[0024] In the description of the utility model, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the features limited as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0025] In the description of the utility model, it is to be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] As Figure 1 shown, a combined thin film evaporator at least includes a primary thin film evaporator 1 and a secondary thin film evaporator 2 for evaporating materials. The primary thin film evaporator 1 is connected above the secondary thin film evaporator 2.

[0027] In this embodiment, as shown in Figure 2 The primary thin film evaporator 1 is selected as a vertical evaporator.

[0028] The primary thin film evaporator 1 comprises a first evaporation cylinder 11. The first evaporation cylinder 11 is provided with a first jacket 12. The first jacket 12 is provided with a jacket inlet and a jacket outlet for the flow of heat medium. The inner side of the first jacket 12 is provided with a distributor 13. The first evaporation cylinder 11 is provided with a first feed inlet 14 above the distributor 13 and a first discharge outlet 15 below the distributor 13. A vacuum outlet 16 is located above the first feed inlet.

[0029] The material enters the first evaporation cylinder 11 from the first feed inlet 14, and the heat medium enters the jacket. Under the action of the top distributor 13, the material is distributed to the inner wall of the evaporation cylinder, and under the joint action of the temperature and vacuum in the first evaporation cylinder 11 (the principle of pressure reduction evaporation), part of the material is vaporized, and then the vaporized material becomes gaseous and flows to the vacuum outlet 16. The material that has not been vaporized and is still in liquid state flows to the first discharge outlet 15, thereby achieving separation of evaporation and concentration.

[0030] In this embodiment, as shown in Figure 3 The secondary thin film evaporator 2 is selected as a horizontal evaporator.

[0031] The secondary thin film evaporator 2 comprises a second evaporation cylinder 21, and the second evaporation cylinder 21 is provided with a second jacket 22. The second jacket 22 is provided with a jacket inlet and a jacket outlet for the flow of heat medium. The inner side of the second jacket 22 is provided with a screw type paddle 23. The second evaporation cylinder 21 is provided with a second feed inlet 24 above and a second discharge outlet 25 below. The second feed inlet 24 is connected to the first discharge outlet 15.

[0032] The material that flows out of the first discharge outlet 15 and is still in liquid state without being vaporized enters the second evaporation cylinder 21 through the second feed inlet 24. Under the joint action of the temperature and vacuum in the second evaporation cylinder 21 (the principle of pressure reduction evaporation), part of the material is vaporized, and then the vaporized material becomes gaseous and flows to the vacuum outlet 16 through the second feed inlet 24, the first discharge outlet 15 and the first evaporation cylinder 11. The material that has not been vaporized and is still in liquid, solid or semi-solid state remains in the second evaporation cylinder 21 and is forced to be transported to the second discharge outlet 25 by the screw type paddle 23, thereby achieving separation of evaporation and concentration.

[0033] The first evaporation cylinder 11 and the second evaporation cylinder 21 are provided with a sight glass 17, which can be used to observe the actual running condition of the evaporation cylinder at any time.

[0034] The vacuum outlet 16 of the primary thin film evaporator 1 is used as a concentrated outlet of all evaporated materials, so that the evaporated materials and concentrated materials can be collected separately.

[0035] In order to meet the demand of low organic solvent residue, a plurality of secondary thin film evaporators can be connected behind the primary thin film evaporator, so that multi-stage evaporation and concentration of the materials can be realized, the organic solvent residue is further reduced, and the evaporation and concentration of high-viscosity, solid and semi-solid materials can be met.

[0036] In conclusion, the combined thin film evaporator can separate the evaporated materials and concentrated materials through multi-stage evaporation, reduce the organic solvent residue, and meet the evaporation and concentration of different materials.

[0037] According to the ideal embodiments of the utility model, the related personnel can make various changes and modifications without deviating from the technical thought of the utility model. The technical scope of the utility model is not limited to the content in the specification, and must be determined by the scope of claims.

Claims

1. A combined thin film evaporator comprising at least a primary thin film evaporator (1) and a secondary thin film evaporator (2) for evaporating a material, the material outlet of the primary thin film evaporator (1) being connected to the material inlet of the secondary thin film evaporator (2), characterized in that The primary thin film evaporator (1) is provided with a vacuum outlet (16), the material flows through the primary thin film evaporator (1) and the secondary thin film evaporator (2) in sequence, the material vaporized by the primary thin film evaporator (1) flows out from the vacuum outlet (16), and the material vaporized by the secondary thin film evaporator (2) flows back to the primary thin film evaporator (1) and then flows out from the vacuum outlet (16).

2. The combined thin film evaporator of claim 1, wherein, The primary thin film evaporator comprises a first evaporation cylinder (11), the first evaporation cylinder (11) is provided with a first jacket (12) inside, the inside of the first jacket (12) is provided with a distributor (13), the first evaporation cylinder (11) is provided with a first feeding port (14) above the distributor (13), and the first evaporation cylinder (11) is provided with a first discharging port (15) below the distributor (13).

3. The combined thin film evaporator of claim 2, wherein, The secondary thin film evaporator (2) comprises a second evaporation cylinder (21), the second evaporation cylinder (21) is provided with a second jacket (22) inside, the inside of the second jacket (22) is provided with a screw type paddle (23), the upper portion of the second evaporation cylinder (21) is provided with a second feeding port (24), and the lower portion of the second evaporation cylinder (21) is provided with a second discharging port (25), the second feeding port (24) is connected with the first discharging port (15).

4. The combined thin-film evaporator according to claim 2 or 3, characterized in that The vacuum outlet (16) is located above the first feeding port (14).

5. The combined thin film evaporator of claim 4, wherein, The first jacket and the second jacket (22) are both provided with a jacket inlet and a jacket outlet for the flow of heat medium.

6. The combined thin film evaporator of claim 4, wherein, The first evaporation cylinder (11) and the second evaporation cylinder (21) are both provided with a sight glass (17).

7. The combined thin film evaporator of claim 4, wherein, The primary thin film evaporator (1) is a vertical thin film evaporator, and the secondary thin film evaporator (2) is a horizontal thin film evaporator.

8. The combined thin film evaporator of claim 7, wherein, The primary thin film evaporator (1) is connected above the secondary thin film evaporator (2).

9. The combined thin film evaporator of claim 1, wherein, A plurality of the primary thin film evaporators (1) and the secondary thin film evaporators (2) are connected in sequence.

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