Material taking and washing device of MVR (mechanical vapor recompression) evaporation system

Abstract

The utility model discloses an MVR evaporation system material taking and washing device, and relates to the technical field of crystallization and washing, the MVR evaporation system material taking and washing device comprises a washing tank and a separation tank, the separation tank is arranged in the washing tank, the separation tank is provided with draining holes, the separation tank is internally provided with a stirring frame, the stirring frame is internally provided with a water flow channel, the stirring frame is provided with water spraying holes, and the water spraying holes are communicated with the water flow channel. One end of the stirring frame is fixedly connected with a stirring driving unit, and washing water pipes are symmetrically arranged at the other end of the stirring frame. According to the elutriation device, through the arrangement of the rotary stirring mechanism, in the using process, a saturated solution can be fully stirred, small crystals can be rapidly and fully dissolved in the saturated solution, the dissolving amount of the small crystals is increased, and then the elutriation effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of crystal elutriation, and particularly to a material taking and elutriation device for an MVR evaporation system. Background Art

[0002] At present, enterprises using evaporation crystallization technology mostly adopt MVR (mechanical vapor recompression) or ME (multiple effect distillation) technology. However, this kind of technology mostly uses steam heating, and the temperature is relatively high. If the crystallized product is directly discharged, it will cause heat to be carried out of the evaporation system, resulting in losses. Moreover, if the crystallized product is used as a product, the particle size of the crystallized product discharged by this kind of technology varies greatly, which affects the appearance and quality of the product, may also have a certain impact on subsequent processing, reduces the added value of the product, and may increase subsequent environmental protection investment at the same time.

[0003] To solve these problems, an elutriation function is added during the process of discharging crystallized products from the salt leg. Among them, elutriation is an energy-saving measure that uses low-temperature raw material liquid with the same component as the evaporation raw material to elutriate the externally discharged crystallized product slurry in the salt leg, so as to recover part of the heat and dissolve part of the small particle crystallized products.

[0004] In the prior art, during the use of the elutriation device of the evaporation crystallization system, it is not convenient to separate normal-sized crystals and small crystals, and the dissolution efficiency of small crystals in the saturated solution is low. Summary of the Utility Model

[0005] The main purpose of the present application is to provide a material taking and elutriation device for an MVR evaporation system, aiming to solve the above technical problems.

[0006] The technical solution adopted by the present application is as follows:

[0007] A material taking and elutriation device for an MVR evaporation system includes an elutriation tank and a separation tank. The separation tank is arranged inside the elutriation tank. The separation tank is provided with water drainage holes. A stirring frame is arranged inside the separation tank. A water flow channel is arranged inside the stirring frame. Spraying holes are arranged on the stirring frame. One end of the stirring frame is fixedly connected to a stirring drive unit, and elutriation water pipes are symmetrically arranged at the other end of the stirring frame.

[0008] Optionally, the stirring drive unit includes a stirring motor and a stirring shaft. The stirring motor is fixedly arranged on the outer wall of the elutriation tank. The stirring shaft sequentially passes through the elutriation tank and the separation tank and is fixedly connected to the stirring frame.

[0009] Optionally, the elutriation tank and the separation tank are provided with a first shaft sleeve for the stirring shaft to pass through, and a first bearing rotatably assembled with the stirring shaft is arranged inside the first shaft sleeve.

[0010] Optionally, the elutriation water pipe includes a water inlet pipe and a water inlet pipe. The water inlet pipe is fixedly connected to the stirring frame. The water inlet pipe sequentially passes through the separation tank and the elutriation tank from inside to outside and is connected to the water inlet pipe through a rotary joint.

[0011] Optionally, the elutriation tank and the separation tank are provided with a second shaft sleeve for the water inlet pipe to pass through, and a second bearing rotatably assembled with the water inlet pipe is arranged inside the second shaft sleeve.

[0012] Optionally, a flushing pipe is further connected to the water inlet pipe, and flow regulating valves are independently arranged on both the water inlet pipe and the flushing pipe.

[0013] Optionally, the top of the elutriation tank is provided with an openable tank cover, and a liquid inlet pipe for introducing the crystal concentrated solution into the separation tank is arranged on the tank cover.

[0014] Optionally, a liquid outlet pipe is arranged at the bottom of the elutriation tank, and a switch valve is arranged on the liquid outlet pipe.

[0015] Optionally, the elutriation water pipe is coated with a heat insulation pipe sleeve.

[0016] Optionally, the aperture of the water draining holes is smaller than the particle size of normal crystals.

[0017] Compared with the prior art, the beneficial effects of this application are as follows:

[0018] A material taking and elutriation device for an MVR evaporation system provided by an embodiment of this application, through the arranged rotating stirring mechanism, during use, can fully stir the saturated solution, facilitating the rapid and full dissolution of small crystals in the saturated solution, increasing the dissolution amount of small crystals, thereby improving the elutriation effect and making the elutriation more thorough. At the same time, the normal crystals after elutriation are filtered by the separation tank and retained in the separation tank, thus realizing the effective separation of normal-sized crystals and small crystals. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the material taking and elutriation device for the MVR evaporation system provided by the embodiment of this application from one perspective;

[0020] Figure 2 is an internal structural schematic diagram of the material taking and elutriation device for the MVR evaporation system provided by the embodiment of this application from one perspective.

[0021] Explanation of the reference numerals in the drawings:

[0022] 100 - elutriation tank, 101 - separation tank, 102 - tank cover, 103 - liquid inlet pipe, 104 - stirring rack, 105 - water flow channel, 106 - water spraying hole, 107 - water draining hole, 108 - stirring motor, 109 - stirring shaft, 110 - first shaft sleeve, 111 - water diversion pipe, 112 - water inlet pipe, 113 - rotary joint, 114 - flushing pipe, 115 - liquid outlet pipe, 116 - second shaft sleeve. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0024] It should be noted that all the directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] In the present application, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0027] Refer to the attachedFigures 1 to 2 As shown in the figure, an embodiment of the present application provides a material-taking and elutriating device for an MVR evaporation system, which includes an elutriation tank 100 and a separation tank 101. The separation tank 101 is arranged inside the elutriation tank 100. The top of the elutriation tank 100 is provided with a removable tank cover 102 to facilitate the cleaning of normal crystals inside the separation tank 101. The tank cover 102 is centrally provided with a liquid inlet pipe 103. The liquid inlet pipe 103 extends inward into the separation tank 101. The concentrated solution to be crystallized enters the separation tank 101 from the liquid inlet pipe 103 and is elutriated by elutriation water to form crystals of normal size. Drainage holes 107 are arranged on the middle and lower tank walls of the separation tank 101. The aperture of the drainage holes 107 is smaller than the particle size of normal crystals, so that the crystals of normal size are filtered and retained in the separation tank 101. A liquid outlet pipe 115 is arranged at the bottom of the elutriation tank 100. A switching valve is arranged on the liquid outlet pipe 115. Opening the switching valve can discharge the elutriation liquid.

[0028] In the above, refer to Figure 2 As shown in the figure, a stirring frame 104 is arranged inside the separation tank 101. The stirring frame 104 can fully stir the crystallized concentrated solution and elutriation water inside the separation tank 101 to improve the dissolution rate of small crystals in the crystallized concentrated solution. A water flow channel 105 is arranged inside the stirring frame 104. Spraying holes 106 communicated with the water flow channel 105 are arranged on the stirring frame 104. One end of the stirring frame 104 is fixedly connected to a stirring drive unit, and elutriation water pipes are symmetrically arranged at the other end of the stirring frame 104. The stirring drive unit can rotate the stirring frame 104 to complete stirring. The elutriation water pipes can fill the elutriation water into the stirring frame 104 and spray it out through the spraying holes 106 to make the elutriation water and the crystallized concentrated solution fully contact.

[0029] Among them, the stirring drive unit includes a stirring motor 108 and a stirring shaft 109. The stirring motor 108 is arranged outside the elutriation tank 100. A motor mounting plate is integrally formed on the outer wall of the elutriation tank 100. The stirring motor 108 is fixed to the motor mounting plate by screws. The stirring shaft 109 is connected to the stirring motor 108 through a coupling. The elutriation tank 100 and the separation tank 101 are provided with a first shaft sleeve 110 for the stirring shaft 109 to pass through. The stirring shaft 109 passes through the first shaft sleeve 110 and extends into the interior of the separation tank 101 and is fixedly connected to the stirring frame 104. At the same time, the stirring shaft 109 and the first shaft sleeve 110 are assembled through bearings to ensure that the stirring shaft 109 can drive the stirring frame 104 to rotate.

[0030] Meanwhile, in the above, the elutriation water pipe includes a water inlet pipe 111 and a water inlet pipe 112. The water inlet pipe 112 is fixedly connected to the stirring frame 104 and communicates with the water flow channel 105. The water inlet pipe 112 passes through the separation tank 101 and the elutriation tank 100 from inside to outside in sequence. Second bushings 116 for the water inlet pipe 112 to pass through are provided on the side walls of the elutriation tank 100 and the separation tank 101, and the second bushings 116 are rotationally connected to the water inlet pipe 112 through bearings. The water inlet pipe 111 is connected to the water inlet pipe 112 through a rotary joint 113. Thus, when the stirring frame 104 rotates, the water inlet pipe 111 can be prevented from following synchronously through the rotary joint 113. The rotary joint 113 is of a conventional structure and will not be elaborated here. It can be understood that elutriation water is introduced into the stirring frame 104 through the water inlet pipe 111 and the water inlet pipe 112, and the elutriation water ejected by the stirring frame 104 makes full contact with the crystal concentrated solution, improving the elutriation efficiency. Of course, as a preference, a heat insulation sleeve can be coated outside the elutriation water pipe. The heat insulation sleeve can be made of the heat-insulating material pearlite sand, which can prevent the temperature of the elutriation liquid from dissipating before entering, ensuring a better elutriation effect.

[0031] In this embodiment, the liquid level in the separation tank 101 cannot be higher than the top of the separation tank 101, and the liquid level in the elutriation tank 100 cannot be higher than the lowest surface of the first bushing 110 and the second bushing 116.

[0032] In a preferred embodiment, as Figure 1 and Figure 2 shown, a flushing pipe 114 is further connected to the water inlet pipe 111. Flow regulating valves are independently provided on both the water inlet pipe 111 and the flushing pipe 114. By providing the flushing pipe 114, the water inlet pipe 111 has a self-cleaning function, reducing the possibility of blockage.

[0033] In summary, the embodiment of the present application provides an MVR evaporation system material taking and elutriation device. Through the provided rotating stirring mechanism, during use, the saturated solution can be fully stirred, facilitating the rapid and full dissolution of small crystals in the saturated solution, increasing the dissolution amount of small crystals, thereby improving the elutriation effect and making the elutriation more thorough. At the same time, the normal crystals after elutriation are filtered by the separation tank 101 and retained in the separation tank 101, thus realizing the effective separation of normal-sized crystals and small crystals.

[0034] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A material washing device for an MVR evaporation system, characterized in that: It comprises a washing tank and a separation tank, wherein the separation tank is arranged in the washing tank, the separation tank is provided with a drain hole, a stirring frame is arranged in the separation tank, a water flow channel is arranged in the stirring frame, a water spray hole is arranged on the stirring frame, one end of the stirring frame is fixedly connected to a stirring drive unit, and a washing water pipe is symmetrically arranged at the other end of the stirring frame.

2. The MVR evaporation system material extraction and washing device according to claim 1 is characterized in that: The stirring driving unit comprises a stirring motor and a stirring shaft. The stirring motor is fixedly arranged on the outer wall of the elutriation tank. The stirring shaft passes through the elutriation tank and the separation tank in sequence and is fixedly connected to the stirring frame.

3. The MVR evaporation system material extraction and washing device according to claim 2 is characterized in that: The washing tank and the separation tank are provided with a first shaft sleeve for the stirring shaft to pass through, and a first bearing rotatably assembled with the stirring shaft is provided in the first shaft sleeve.

4. The MVR evaporation system material extraction and washing device according to claim 1 is characterized in that: The washing water pipe comprises a water diversion pipe and a water inlet pipe, the water inlet pipe is fixedly connected to the stirring frame, the water inlet pipe passes through the separation tank and the washing tank in sequence from the inside to the outside and is connected to the water inlet pipe through a rotating joint.

5. The MVR evaporation system material extraction and washing device according to claim 4 is characterized in that: The washing tank and the separation tank are provided with a second shaft sleeve for the water inlet pipe to pass through, and a second bearing rotatably assembled with the water inlet pipe is provided in the second shaft sleeve.

6. The MVR evaporation system material extraction and washing device according to claim 4, characterized in that: The water diversion pipe is also connected to a flushing pipe, and both the water diversion pipe and the flushing pipe are independently provided with flow regulating valves.

7. The MVR evaporation system material extraction and washing device according to claim 1, characterized in that: The top of the washing tank is provided with an openable tank cover, and the tank cover is provided with a liquid inlet pipe for introducing the concentrated crystallization solution into the separation tank.

8. The MVR evaporation system material extraction and washing device according to claim 1, characterized in that: A liquid outlet pipe is arranged at the bottom of the washing tank, and a switch valve is arranged on the liquid outlet pipe.

9. The MVR evaporation system material extraction and washing device according to claim 1, characterized in that: The washing water pipe is covered with a heat-insulating pipe sleeve.

10. The MVR evaporation system material extraction and washing device according to claim 1, characterized in that: The pore size of the drainage hole is smaller than the particle size of normal crystals.

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