Scraper film evaporator

Abstract

The utility model discloses a scraper film evaporator, which belongs to the technical field of evaporators and comprises an evaporation barrel and a lower barrel, a rotating shaft is rotatably mounted at the top end of the inner wall of the evaporation barrel, a driving part is mounted at the top end of the rotating shaft, and a stirring shaft is rotatably mounted in the lower barrel. The top end of the stirring shaft extends into the evaporation barrel and is connected with the rotating shaft in a clamped mode, a scraper assembly is installed on the outer side of the stirring shaft, a material inlet, a steam outlet and a steam inlet are formed in the outer side of the evaporation barrel, a material outlet is formed in the bottom end of the lower barrel, and the outer side of the evaporation barrel is fixedly sleeved with a heat preservation sleeve. The top end of the heat preservation sleeve is communicated with the steam outlet through a connecting pipe, an air outlet pipe is arranged at the bottom end of one side of the heat preservation sleeve, the equipment is convenient to disassemble, the scraper body can be conveniently replaced in the later period, meanwhile, the heat preservation sleeve can enable flowing-out steam to annularly surround the outer side of the evaporation barrel, and heat of the steam is fully utilized; and waste caused by fast heat loss is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of film evaporators, in particular to a scraper thin film evaporator. Background Art

[0002] At present, thin film evaporator is a type of evaporator, characterized by the material liquid flowing along the heating tube wall in a film-like manner to transfer heat and evaporate, with the advantages of high heat transfer efficiency, fast evaporation speed, and short material residence time. The evaporator has the characteristics of large production capacity, high efficiency, and short material heating time. It is suitable for the concentration of dilute solutions in the pharmaceutical, food, chemical and other industries.

[0003] In the prior art, there is a thin film evaporator with a scraper structure with application number CN202320622252.2, which includes an evaporator body, a motor is fixedly connected to the top outer wall of the evaporator body, a rotating shaft is rotatably connected to the top inner wall of the evaporator body, and one end of the motor output shaft passes through the evaporator body and is fixed to the rotating shaft, a fixed frame is fixedly connected to the bottom inner wall of the evaporator body, a rotating frame is rotatably connected to the top of the fixed frame, and the rotating shaft is fixed to the rotating frame, a sliding groove is provided inside the rotating frame, a sliding rod is slidably connected in the sliding groove, and a scraper is fixedly connected to one side of the sliding rod. The utility model can not only effectively fit the scraper body to the inner wall of the evaporator body through the coordinated use of the sliding rod and the spring, thereby improving the use effect of the device, but also can make the scraper body scrape the raw materials attached to the inner wall of the evaporator body through the rotating frame, thereby improving the cleanliness of the device.

[0004] However, in the solutions in the prior art, during the processing, the heat energy of the steam is consumed quickly and the utilization rate is low. At the same time, when the scraper is damaged at a later stage, it is inconvenient to remove and replace it. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a scraper film evaporator, which aims to improve the problems of fast thermal energy consumption of steam and low utilization rate, and the inconvenience of removing and replacing the scraper when it is damaged in the later stage.

[0006] The utility model is implemented as follows: a scraper film evaporator comprises an evaporating cylinder and a lower cylinder, the bottom end of the evaporating cylinder is sealedly connected to the top end of the lower cylinder, a rotating shaft is rotatably installed on the top end of the inner wall of the evaporating cylinder, a driving member is installed on the top end of the rotating shaft, a stirring shaft is rotatably installed in the lower cylinder, the top end of the stirring shaft extends into the evaporating cylinder and is clamped with the rotating shaft, a scraper assembly is installed on the outside of the stirring shaft, a material inlet, a steam outlet and a steam inlet are arranged on the outside of the evaporating cylinder, a material outlet is arranged at the bottom end of the lower cylinder, an insulation sleeve is fixedly sleeved on the outside of the evaporating cylinder, the top end of the insulation sleeve is connected to the steam outlet through a connecting pipe, and an air outlet pipe is arranged on the bottom end of one side of the insulation sleeve.

[0007] In the preferred technical solution of the present utility model, the driving member includes a motor, which is fixedly mounted on the top of the evaporating cylinder, the output end of the motor passes through the top of the evaporating cylinder and is keyed to the top of the rotating shaft, a protective box is fixedly mounted on the top of the evaporating cylinder, and the motor is arranged in the protective box.

[0008] In the preferred technical solution of the present utility model, a distributor and a separator are also installed in the evaporator cylinder, the distributor is arranged on the inner wall of the evaporator cylinder, the distributor is connected with the material inlet, the separator is located above the distributor, the side wall of the separator is inclined, the separator is located below the steam outlet, and there is a gap between the outer side wall of the separator and the inner wall of the evaporator cylinder to facilitate the falling of liquid. The distributor can make the material evenly distributed when falling, and prevent the material from splashing into the evaporator cylinder. Spraying steam flow is conducive to eliminating foam so that the material can only evaporate along the side wall of the evaporator cylinder, while the separator can reduce the material contained in the discharged steam. The separator is fixedly mounted on the rotating shaft, and the material, moisture, etc. contained in the steam fall onto the distributor along the side wall of the separator and re-exchange heat.

[0009] In the preferred technical solution of the present utility model, the first side panel and the second side panel are symmetrically fixedly installed on the outer sides of the evaporator cylinder and the lower cylinder respectively. After the evaporator cylinder and the lower cylinder are sealed and connected, the first side panel and the second side panel can be fixed by bolts. A sealing ring is fixedly installed on the top end of the lower cylinder, and a sealing groove cooperating with the sealing ring is provided at the bottom end of the evaporator cylinder.

[0010] In the preferred technical solution of the utility model, a cross plate is fixedly installed on the top of the stirring shaft, and a cross groove cooperating with the cross plate is provided at the bottom end of the rotating shaft. The cross plate is slidably connected to the inner wall of the cross groove. When the evaporating cylinder and the lower cylinder are sealed and connected, the cross plate is completely inserted into the cross groove.

[0011] In the preferred technical solution of the utility model, the scraper assembly includes a positioning ring, a support plate and a scraper body, a plurality of the positioning rings are fixedly installed on the outside of the stirring shaft, a plurality of the support plates are fixedly installed on the outside of the positioning ring, a clamping block is fixedly installed at one end of the support plate, the scraper body is fixedly connected to the plurality of the clamping blocks on the same side by bolts, and the clamping block is U-shaped.

[0012] In the preferred technical solution of the utility model, an insulation layer is formed between the inner wall of the insulation sleeve and the outer side of the evaporating cylinder, and a plurality of isolation rings are fixedly installed in the insulation layer. Each isolation ring is provided with a circular hole, and the circular holes on two adjacent isolation rings are staggered.

[0013] In the preferred technical solution of the utility model, a plurality of support plates are fixedly installed in an annular shape on the inner wall of the lower cylinder, a bottom plate is fixedly installed on one end of the support plate, the stirring shaft is rotatably installed on the top of the bottom plate, and a conical head is fixedly installed on the outer side of the bottom plate.

[0014] The beneficial effects of the utility model are as follows: the scraper film evaporator obtained by the utility model through the above design, when in use, starts the motor to drive the rotating shaft to rotate, the rotation of the rotating shaft drives the stirring shaft to rotate, thereby driving the scraper assembly to rotate to work, puts the material into the material inlet and then enters the distributor to evenly enter the evaporating cylinder body, and then adds steam through the steam inlet, and the steam enters the evaporating cylinder body and flows upward to the separator for separation, and the exhaust gas is discharged from the steam outlet and enters the insulation sleeve through the connecting pipe, and then the isolation ring and the circular hole cooperate to make the exhaust gas flow evenly in the insulation sleeve to insulate the evaporating cylinder body, this equipment is easy to disassemble, and it is convenient to replace the scraper body at a later time, and at the same time the insulation sleeve can make the outflowing steam surround the outside of the evaporating cylinder body in a ring shape, fully utilizing the heat of the steam and avoiding waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of a scraped thin film evaporator provided by an embodiment of the utility model;

[0017] Figure 2 A cross-sectional view of a scraped thin film evaporator is provided for an embodiment of the utility model;

[0018] Figure 3 A schematic diagram of the structure of a scraper assembly is provided for an embodiment of the utility model;

[0019] Figure 4 A schematic diagram of the internal structure of a thermal insulation sleeve is provided for an embodiment of the utility model.

[0020] In the figure: 110-evaporation cylinder; 111-rotating shaft; 112-material inlet; 113-steam outlet; 114-steam inlet; 115-motor; 116-distributor; 117-separator; 120-lower cylinder; 121-stirring shaft; 122-material outlet; 130-scraper assembly; 131-positioning ring; 132-support plate; 133-scraper body; 134-clamping block; 140-insulation sleeve; 141-connecting pipe; 142-exhaust pipe; 143-isolating ring; 144-circular hole;. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1 and Figure 2 The utility model provides a technical solution: a scraper thin film evaporator, including an evaporation cylinder 110 and a lower cylinder 120, the bottom end of the evaporation cylinder 110 is sealed and connected to the top of the lower cylinder 120, a rotating shaft 111 is rotatably installed on the top of the inner wall of the evaporation cylinder 110, a driving member is installed on the top of the rotating shaft 111, a stirring shaft 121 is rotatably installed in the lower cylinder 120, the top of the stirring shaft 121 extends into the evaporation cylinder 110 and is clamped with the rotating shaft 111, a scraper assembly 130 is installed on the outside of the stirring shaft 121, and the outside of the evaporation cylinder 110 is provided with a scraper assembly 130. A material inlet 112, a steam outlet 113 and a steam inlet 114 are provided on the side, a material outlet 122 is provided at the bottom end of the lower cylinder 120, an insulation sleeve 140 is fixedly sleeved on the outside of the evaporating cylinder 110, the top of the insulation sleeve 140 is connected with the steam outlet 113 through a connecting pipe 141, an air outlet pipe 142 is provided at the bottom end of one side of the insulation sleeve 140, a plurality of support plates are fixedly installed in an annular manner on the inner wall of the lower cylinder 120, one end of the support plate is fixedly installed on the bottom plate, a stirring shaft 121 is rotatably installed on the top of the bottom plate, and a conical head is fixedly installed on the outside of the bottom plate.

[0023] In some specific embodiments, the driving member includes a motor 115, which is fixedly mounted on the top of the evaporating cylinder 110. The output end of the motor 115 passes through the top of the evaporating cylinder 110 and is keyed to the top of the rotating shaft 111. A protective box is fixedly mounted on the top of the evaporating cylinder 110, and the motor 115 is arranged in the protective box. The protective box protects the motor 115.

[0024] In some specific embodiments, a distributor 116 and a separator 117 are also installed in the evaporation cylinder 110. The distributor 116 is arranged on the inner wall of the evaporation cylinder 110, and the distributor 116 is connected to the material inlet 112. The separator 117 is located above the distributor 116, and the side wall of the separator 117 is inclined. The separator 117 is located below the steam outlet 113. There is a gap between the outer side wall of the separator 117 and the inner side wall of the evaporation cylinder 110 to facilitate the falling of the liquid. The distributor 116 can make the material evenly distributed when falling, and at the same time prevent the material from splashing into the evaporation cylinder 110. Spraying steam flow into the interior of the evaporation cylinder 110 is conducive to eliminating foam so that the material can only evaporate along the side wall of the evaporation cylinder 110, and the separator 117 can reduce the material contained in the discharged steam. The separator 117 is fixedly mounted on the rotating shaft 111, and the material, moisture, etc. contained in the steam fall along the side wall of the separator 117 onto the distributor 116 for re-heat exchange.

[0025] In some specific implementation schemes, the first side panel and the second side panel are symmetrically fixedly installed on the outer sides of the evaporating cylinder 110 and the lower cylinder 120 respectively. After the evaporating cylinder 110 and the lower cylinder 120 are sealed and connected, the first side panel and the second side panel can be fixed by bolts. A sealing ring is fixedly installed on the top of the lower cylinder 120, and a sealing groove cooperating with the sealing ring is provided at the bottom end of the evaporating cylinder 110, thereby improving the sealing performance when the evaporating cylinder 110 and the lower cylinder 120 are connected.

[0026] In some specific implementation schemes, a cross plate is fixedly installed on the top of the stirring shaft 121, and a cross groove matching the cross plate is provided at the bottom of the rotating shaft 111. The cross plate is slidably connected to the inner wall of the cross groove. When the evaporating cylinder 110 and the lower cylinder 120 are sealed and connected, the cross plate is completely inserted into the cross groove, so that the stirring shaft 121 and the rotating shaft 111 can be quickly connected and rotate synchronously.

[0027] See also Figure 3 The scraper assembly 130 includes a positioning ring 131, a support plate 132 and a scraper body 133. Multiple positioning rings 131 are fixedly installed on the outside of the stirring shaft 121, multiple support plates 132 are fixedly installed on the outside of the positioning ring 131, and a clamping block 134 is fixedly installed at one end of the support plate 132. The scraper body 133 is fixedly connected to the multiple clamping blocks 134 on the same side by bolts. The clamping block 134 is U-shaped, which is convenient for installing and disassembling the scraper body 133.

[0028] See also Figure 4 An insulation layer is formed between the inner wall of the insulation sleeve 140 and the outer side of the evaporation cylinder 110, and a plurality of isolation rings 143 are fixedly installed in the insulation layer. Each isolation ring 143 is provided with a circular hole 144, and the circular holes 144 on two adjacent isolation rings 143 are staggered. The discharged steam can flow in a ring around the outer side of the evaporation cylinder 110 to prevent the heat in the evaporation cylinder 110 from being lost too quickly.

[0029] Working principle: When in use, start the motor 115 to drive the rotating shaft 111 to rotate, and the rotation of the rotating shaft 111 drives the stirring shaft 121 to rotate, thereby driving the scraper assembly 130 to rotate to work, and the material is put into the material inlet 112 and enters the distributor 116 to evenly enter the evaporation cylinder 110, and then steam is added through the steam inlet 114. After the steam enters the evaporation cylinder 110, it flows upward to the separator 117 for separation, and the exhaust gas is discharged from the steam outlet 113 and enters the insulation sleeve 140 through the connecting pipe 141, and then the isolation ring 143 and the circular hole 144 cooperate to make the exhaust gas flow evenly in the insulation sleeve 140 to keep the evaporation cylinder 110 warm.

[0030] The above description is only the preferred implementation 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 scraped film evaporator, characterized in that: The invention comprises an evaporating cylinder body and a lower cylinder body, the bottom end of the evaporating cylinder body is sealedly connected with the top end of the lower cylinder body, a rotating shaft is rotatably installed at the top end of the inner wall of the evaporating cylinder body, a driving member is installed at the top end of the rotating shaft, a stirring shaft is rotatably installed in the lower cylinder body, the top end of the stirring shaft extends into the evaporating cylinder body and is clamped with the rotating shaft, a scraper assembly is installed at the outside of the stirring shaft, a material inlet, a steam outlet and a steam inlet are arranged at the outside of the evaporating cylinder body, a material outlet is arranged at the bottom end of the lower cylinder body, an insulation sleeve is fixedly sleeved on the outside of the evaporating cylinder body, the top end of the insulation sleeve is connected with the steam outlet through a connecting pipe, and an air outlet pipe is arranged at the bottom end of one side of the insulation sleeve.

2. A wiped film evaporator according to claim 1, characterized in that: The driving member comprises a motor, which is fixedly mounted on the top of the evaporating cylinder. The output end of the motor passes through the top of the evaporating cylinder and is key-connected with the top of the rotating shaft.

3. The wiped film evaporator according to claim 1, characterized in that: A distributor and a separator are also installed in the evaporation cylinder. The distributor is arranged on the inner wall of the evaporation cylinder. The distributor is connected with the material inlet. The separator is located above the distributor. The side wall of the separator is inclined. The separator is located below the steam outlet. There is a gap between the outer side wall of the separator and the inner wall of the evaporation cylinder to facilitate the falling of liquid.

4. The wiped film evaporator according to claim 1, characterized in that: The first side plate and the second side plate are symmetrically fixedly installed on the outer sides of the evaporating cylinder and the lower cylinder respectively. After the evaporating cylinder and the lower cylinder are sealed and connected, the first side plate and the second side plate can be fixed by bolts.

5. The wiped film evaporator according to claim 1, characterized in that: A cross plate is fixedly mounted on the top of the stirring shaft, a cross groove matched with the cross plate is arranged at the bottom of the rotating shaft, and the cross plate is slidably connected with the inner wall of the cross groove.

6. The wiped film evaporator according to claim 1, characterized in that: The scraper assembly includes a positioning ring, a support plate and a scraper body. A plurality of positioning rings are fixedly installed on the outer side of the stirring shaft, a plurality of support plates are fixedly installed on the outer side of the positioning ring, a clamping block is fixedly installed at one end of the support plate, and the scraper body is fixedly connected to the plurality of clamping blocks on the same side by bolts.

7. The wiped film evaporator according to claim 1, characterized in that: A heat-insulating layer is formed between the inner wall of the heat-insulating sleeve and the outer side of the evaporating cylinder body, and a plurality of isolating rings are fixedly installed in the heat-insulating layer, and each of the isolating rings is provided with a circular hole.

8. The wiped film evaporator according to claim 1, characterized in that: A plurality of support plates are fixedly installed in an annular manner on the inner wall of the lower cylinder, a bottom plate is fixedly installed on one end of the support plate, the stirring shaft is rotatably installed on the top of the bottom plate, and a conical head is fixedly installed on the outer side of the bottom plate.

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