Tubular climbing film evaporator

Abstract

The utility model provides a tubular climbing film evaporator, and belongs to the technical field of climbing film evaporators. The tubular climbing film evaporator comprises a heat exchange assembly and a stirring assembly, the heat exchange assembly comprises an evaporator main body, a heat exchange tube, a flow guide cover and a separator, the heat exchange tube is arranged in the evaporator main body, the stirring assembly comprises a stirring frame and a motor, the stirring frame is rotationally arranged at the bottom in the evaporator main body, and the motor is arranged in the evaporator main body. Through the arrangement of the evaporator main body, the heat exchange pipe, the flow guide covers and the separator and the multiple flow guide covers arranged on the surface of the heat exchange pipe, water flow can be effectively guided to directly drop, the situation that the stability of feed liquid conveyed upwards is reduced due to the fact that water flows downwards along the heat exchange pipe is avoided, secondary steam obtained after gas-liquid separation of the separator is reused, and energy consumption is reduced; raw material liquid can be stirred, the uniformity of the raw material liquid is kept, the quality of product liquid is guaranteed, and long-time blockage caused by sedimentation is avoided.

Description

Technical Field

[0001] The present application relates to the field of rising film evaporators, and in particular to a tubular rising film evaporator. Background Art

[0002] The rising film evaporator feeds the raw liquid preheated to near the boiling point from the bottom feed port of the evaporator, and then heats the heating tube in the heating chamber through the heating steam introduced from the outside, so that the liquid reaches the boiling point. The steam generated by boiling forms a steam column in the center of the heating tube. The steam column makes the boiling liquid form a film-like fluid on one side along the inner wall of the heating tube and rises. When it reaches the top, the steam carries the liquid through the demister and enters the separator for gas-liquid separation, completing the concentration of the raw liquid.

[0003] At present, most rising film evaporators use internal heat exchange tubes to exchange heat, which makes the internal liquid boil. However, the water droplets formed on the outer wall after heat exchange slide down the outer wall of the heat exchange tube and contact the preheated liquid at the bottom of the heat exchange tube, thereby lowering its temperature and greatly increasing energy consumption. In addition, a small amount of particles in some liquid will settle and accumulate at the bottom, which may cause blockage for a long time. The uneven liquid will also affect the quality of the finished liquid. Utility Model Content

[0004] In order to make up for the above shortcomings, the present application provides a tubular rising film evaporator, aiming to improve the problems raised in the above background technology.

[0005] An embodiment of the present application provides a tubular rising film evaporator including a heat exchange component and a stirring component.

[0006] The heat exchange assembly includes an evaporator body, a heat exchange tube, a guide cover and a separator. The heat exchange tube is arranged in the evaporator body, and the evaporator body is sleeved on the outside of the heat exchange tube. The air inlet end of the separator is connected to the top of the evaporator body, and the air outlet end of the separator is connected to the outside of the evaporator body.

[0007] The stirring assembly comprises a stirring frame and a motor. The stirring frame is rotatably arranged at the bottom of the evaporator body. The motor is installed at the bottom of the evaporator body and is transmission-connected to the stirring frame.

[0008] In a specific embodiment, the flow guide cover is conical, and a plurality of the flow guide covers are evenly arranged.

[0009] In the above implementation process, by evenly arranging the conical flow guide hood, water droplets are formed after the steam contacts the heat exchange tube and exchanges heat with the internal liquid. The water droplets flow along the conical flow guide hood and then drip to the bottom of the evaporator body instead of flowing down along the heat exchange tube, thereby ensuring the temperature of the liquid in the heat exchange tube.

[0010] In a specific embodiment, the top end of the evaporator body is connected to the air inlet end of the separator through an air outlet pipe, and the air outlet end of the separator is connected to the outer wall of the evaporator body through an air return pipe.

[0011] In the above implementation process, an air outlet pipe is provided to introduce the gas-liquid mixed gas into the separator for gas-liquid separation, and a gas return pipe is used to reintroduce the gas after gas-liquid separation into the evaporator body.

[0012] In a specific embodiment, an air inlet pipe is connected to the outside of the evaporator body, and a feed pipe is connected to the bottom of the evaporator body.

[0013] In the above implementation process, an air inlet pipe is provided to introduce high-temperature steam supplied from the outside, and a feed pipe is used to introduce raw material liquid.

[0014] In a specific embodiment, the heat exchange component further includes a preheater, which is located outside the evaporator body, and the feed pipe and the return pipe both pass through the preheater.

[0015] In the above implementation process, by providing a preheater, the feed pipe and the return pipe can be heated to ensure the temperature of the medium inside the feed pipe and the return pipe when necessary.

[0016] In a specific embodiment, the stirring frame includes a rotating shaft and a stirring rod, the rotating shaft is rotatably arranged at the bottom of the evaporator body, and the stirring rod is fixedly connected to the surface of the rotating shaft.

[0017] In the above implementation process, by setting the rotating shaft and the stirring rod, the motor is started, the motor drives the rotating shaft to rotate, and the rotating shaft drives multiple stirring rods to rotate. The stirring rods stir the internal raw material liquid to ensure the uniformity of the raw material liquid and greatly reduce sedimentation.

[0018] In a specific embodiment, a partition is disposed in the evaporator body, a drain pipe is disposed in communication with the evaporator body, and the evaporator body is inclined toward the drain pipe.

[0019] In the above implementation process, by arranging the partition to be inclined toward the drain pipe, on the one hand, the liquid is prevented from contacting the top of the liquid bin, and on the other hand, the condensed water is guided to flow toward the drain pipe for discharge.

[0020] In a specific embodiment, support legs are arranged on the outside of the evaporator body, and anti-slip pads are arranged on the bottom of the support legs.

[0021] Beneficial effects: The present application provides a tubular rising film evaporator, which, by arranging an evaporator body, a heat exchange tube, a guide cover and a separator, has multiple guide covers arranged on the surface of the heat exchange tube, which can effectively guide the water flow to drip directly, avoid reducing the stability of the upwardly transported liquid along the downstream of the heat exchange tube, and reuse the secondary steam after gas-liquid separation in the separator, thereby reducing energy consumption. By arranging a stirring rack and a motor, the raw material liquid can be stirred to maintain the uniformity of the raw material liquid to ensure the quality of the product liquid, while avoiding sedimentation and long-term blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of a tubular rising film evaporator provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the heat exchange assembly structure provided for an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of the return air pipe provided in the embodiment of the present application;

[0026] Figure 4 A schematic diagram of the stirring frame structure provided in an embodiment of the present application.

[0027] In the figure: 100-heat exchange component; 110-evaporator body; 111-air outlet pipe; 113-support leg; 120-heat exchange tube; 130-air deflector; 140-separator; 141-return air pipe; 150-inlet pipe; 160-feed pipe; 170-preheater; 180-partition; 190-drain pipe; 200-stirring component; 210-stirring frame; 211-rotating shaft; 212-stirring rod; 220-motor. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0029] See also Figure 1-Figure 4 The present application provides a tubular rising film evaporator including a heat exchange component 100 and a stirring component 200 .

[0030] See also Figure 1 ,2 and 3, the heat exchange assembly 100 includes an evaporator body 110, a heat exchange tube 120, a guide cover 130 and a separator 140, the heat exchange tube 120 is arranged in the evaporator body 110, the evaporator body 110 is sleeved on the outside of the heat exchange tube 120, the air inlet end of the separator 140 is connected to the top of the evaporator body 110, and the air outlet end of the separator 140 is connected to the outside of the evaporator body 110.

[0031] In a specific embodiment, the guide cover 130 is conical, and a plurality of guide covers 130 are evenly arranged. By evenly arranging the conical guide covers 130, water droplets are formed after the steam contacts the heat exchange tubes 120 and exchanges heat with the internal liquid. The water droplets flow along the conical guide covers 130 and then drip to the bottom of the evaporator body 110 instead of flowing down along the heat exchange tubes 120, thereby ensuring the temperature of the liquid in the heat exchange tubes 120.

[0032] Among them, the top of the evaporator body 110 is connected to the air inlet end of the separator 140 through the air outlet pipe 111, and the air outlet end of the separator 140 is connected to the outer wall of the evaporator body 110 through the air return pipe 141. The air outlet pipe 111 is set to introduce the gas-liquid mixed gas into the separator 140 for gas-liquid separation, and the air return pipe 141 is used to re-introduce the gas after gas-liquid separation into the evaporator body 110.

[0033] In this embodiment, an air inlet pipe 150 is connected to the outside of the evaporator body 110, and a feed pipe 160 is connected to the bottom of the evaporator body 110. The air inlet pipe 150 is used to introduce high-temperature steam supplied from the outside, and the feed pipe 160 is used to introduce raw material liquid.

[0034] Specifically, the heat exchange component 100 also includes a preheater 170, which is located outside the evaporator body 110, and the feed pipe 160 and the return air pipe 141 both pass through the preheater 170. By setting the preheater 170, the feed pipe 160 and the return air pipe 141 can be heated to ensure the temperature of the medium inside the feed pipe 160 and the return air pipe 141 when necessary.

[0035] In a specific embodiment, a support leg 113 is disposed on the outside of the evaporator body 110 , and an anti-slip pad is disposed on the bottom of the support leg 113 .

[0036] It should be noted that a partition 180 is provided in the evaporator body 110, and a drain pipe 190 is connected to the evaporator body 110. The evaporator body 110 is inclined toward the drain pipe 190. By setting the partition 180 to be inclined toward the drain pipe 190, on the one hand, the liquid is prevented from contacting the top of the liquid bin, and on the other hand, the condensed water is guided to flow to the drain pipe 190 for discharge.

[0037] See also Figure 1 , 2, 3 and 4, the stirring assembly 200 includes a stirring frame 210 and a motor 220, the stirring frame 210 is rotatably arranged at the bottom of the evaporator body 110, and the motor 220 is installed at the bottom of the evaporator body 110 and is transmission-connected to the stirring frame 210.

[0038] Among them, the stirring frame 210 includes a rotating shaft 211 and a stirring rod 212. The rotating shaft 211 is rotatably set at the bottom of the evaporator body 110, and the stirring rod 212 is fixedly connected to the surface of the rotating shaft 211. By setting the rotating shaft 211 and the stirring rod 212, the motor 220 is started, the motor 220 drives the rotating shaft 211 to rotate, and the rotating shaft 211 drives multiple stirring rods 212 to rotate. The stirring rods 212 stir the internal raw material liquid to ensure the uniformity of the liquid and greatly reduce sedimentation.

[0039] The working principle of the tubular rising film evaporator is as follows: when in use, the feed liquid is passed through the feed pipe 160 into the feed liquid bin at the bottom of the feed pipe 160, and then enters the heat exchange tube 120, and the high-temperature steam is passed through the air inlet pipe 150. The high-temperature steam contacts the heat exchange tube 120, and the feed liquid in the heat exchange tube 120 exchanges heat with the high-temperature steam. The condensed water generated by the heat exchange flows along the conical guide cover 130 and then drips onto the baffle 180 at the bottom of the evaporator body 110, instead of flowing down along the heat exchange tube 120, so as to ensure the temperature of the feed liquid in the heat exchange tube 120. The inclined baffle 180 guides the condensed water to flow to the drain pipe 190 for discharge, and at the same time When the raw material liquid enters the liquid silo, the motor 220 is started, and the motor 220 drives the rotating shaft 211 to rotate, and the rotating shaft 211 drives multiple stirring rods 212 to rotate. The stirring rods 212 stir the internal raw material liquid to ensure the uniformity of the liquid and greatly reduce sedimentation. The gas-liquid mixed gas generated after the heat exchange is introduced into the separator 140 for gas-liquid separation. The return pipe 141 is used to reintroduce the secondary steam after gas-liquid separation into the evaporator body 110 for reuse to reduce energy consumption. In order to ensure stability, the preheater 170 can be turned on to ensure the temperature of the medium inside the feed pipe 160 and the return pipe 141 when necessary.

[0040] It should be noted that the specific models and specifications of the separator 140, preheater 170 and motor 220 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it will not be described in detail.

[0041] The power supply and principle of the separator 140, the preheater 170 and the motor 220 are clear to those skilled in the art and will not be described in detail herein.

[0042] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A tubular rising film evaporator, characterized in that: include A heat exchange component (100), the heat exchange component (100) comprising an evaporator body (110), a heat exchange tube (120), a flow guide cover (130) and a separator (140), the heat exchange tube (120) being arranged in the evaporator body (110), the evaporator body (110) being sleeved on the outside of the heat exchange tube (120), the air inlet end of the separator (140) being connected to the top of the evaporator body (110), and the air outlet end of the separator (140) being connected to the outside of the evaporator body (110); A stirring assembly (200), the stirring assembly (200) comprising a stirring frame (210) and a motor (220), the stirring frame (210) being rotatably disposed at the bottom of the evaporator body (110), and the motor (220) being installed at the bottom of the evaporator body (110) and being transmission-connected to the stirring frame (210).

2. A tubular rising film evaporator according to claim 1, characterized in that: The air guide cover (130) is conical, and a plurality of the air guide covers (130) are evenly arranged.

3. A tubular rising film evaporator according to claim 1, characterized in that: The top end of the evaporator body (110) is connected to the air inlet end of the separator (140) via an air outlet pipe (111), and the air outlet end of the separator (140) is connected to the outer wall of the evaporator body (110) via an air return pipe (141).

4. A tubular rising film evaporator according to claim 3, characterized in that: An air inlet pipe (150) is disposed in communication with the outside of the evaporator body (110), and a feed pipe (160) is disposed in communication with the bottom of the evaporator body (110).

5. A tubular rising film evaporator according to claim 4, characterized in that: The heat exchange component (100) further comprises a preheater (170), wherein the preheater (170) is located outside the evaporator body (110), and the feed pipe (160) and the return air pipe (141) both pass through the preheater (170).

6. The tubular rising film evaporator according to claim 1, characterized in that: The stirring frame (210) comprises a rotating shaft (211) and a stirring rod (212); the rotating shaft (211) is rotatably disposed at the bottom of the evaporator body (110); and the stirring rod (212) is fixedly connected to the surface of the rotating shaft (211).

7. The tubular rising film evaporator according to claim 1, characterized in that: A partition plate (180) is arranged inside the evaporator body (110), and a liquid drain pipe (190) is arranged in communication with the evaporator body (110), and the evaporator body (110) is inclined toward the liquid drain pipe (190).

8. The tubular rising film evaporator according to claim 1, characterized in that: A support leg (113) is provided on the outside of the evaporator body (110), and an anti-slip pad is provided on the bottom of the support leg (113).

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