A calcium chloride production evaporation device and process

Abstract

The present invention relates to the technical field of evaporation devices, and specifically discloses a calcium chloride production evaporation device and process. The device includes an installation box, in which two flexible plates opposite to each other on the left and right and two push table assemblies opposite to each other on the front and back are arranged. The front and rear ends of the flexible plates are respectively in contact with and sealed with the push table assemblies. The flexible plates and the push table assemblies are both sealed with the installation box. The bottom of the installation box, the two flexible plates, and the two push table assemblies jointly form an evaporation space. A driving mechanism for driving each flexible plate to move left and right is also arranged in the installation box, and sliders are fixedly arranged on the front and rear ends of the flexible plates. In the process of the flexible plate changing from a bent state to a straight state, the flexible plate scrapes off the crystals on the inner wall of the push table and the bottom wall of the installation box. The present invention scrapes off the crystals on the inner wall of the push table by changing the flexible plate from a bent state to a straight state, and scrapes off the crystals on the bottom wall of the installation box through the bottom of the flexible plate.

Description

Technical Field

[0001] The invention relates to the technical field of evaporation devices, and in particular to an evaporation device and process for producing calcium chloride. Background Art

[0002] Calcium chloride is a salt composed of chlorine and calcium. It is slightly bitter and tasteless. It is a typical ionic halide, white, hard pieces or granules at room temperature. Common applications of calcium chloride include brine used in refrigeration equipment, road deicing agents and desiccants. Relevant studies have shown that the composite adsorbent prepared by carrying calcium chloride on molecular sieves has better adsorption performance and stability than a single adsorbent. When producing calcium chloride, it needs to be evaporated and crystallized, so a dedicated calcium chloride evaporation equipment is required.

[0003] The calcium chloride evaporation equipment of the prior art is generally shown in the Chinese patent document with the authorization announcement number CN212214660U, which discloses a high-efficiency brine evaporation and crystallization device for industrial salt production, including an evaporation box and a solution tank, the solution tank is located inside the evaporation box and is detachably connected, the bottom end and the inner wall of the evaporation box are both installed with an electric heating box, the surface of the evaporation box is plugged with a stirring mechanism, the outer wall of the evaporation box is movably connected to the insulation layer, a desiccant box is installed at the top position of the evaporation box, the upper surface of the evaporation box is plugged with an exhaust pipe, the open end of the exhaust pipe is connected to the exhaust gas treatment mechanism, the exhaust gas treatment mechanism respectively includes a water tank, an activated carbon mesh plate, an air guide pipe and a blower, and the upper surface of the evaporation box is plugged with a temperature sensor. In this patent document, the water in the solution tank is stirred by using a stirring mechanism to improve the heating effect of the brine and improve the production efficiency. The exhaust gas discharged is filtered and cleaned by the exhaust gas treatment mechanism, which is beneficial to environmental protection.

[0004] When the calcium chloride evaporation equipment of the prior art is used, after evaporation is completed, crystals will remain on the wall and bottom of the solution tank, which need to be scraped off manually, which is time-consuming and laborious. Summary of the invention

[0005] The invention provides a calcium chloride production evaporation device and process, aiming to solve the problem in the related art that the calcium chloride production evaporation device needs to clean the evaporation chamber after evaporation is completed.

[0006] The present invention provides the following technical solutions: a calcium chloride production evaporation device, comprising an installation box, wherein two flexible plates opposite to each other on the left and right sides and two pusher assemblies opposite to each other on the front and back sides are arranged in the installation box, the front and back ends of the flexible plates are respectively in contact with the pusher assemblies and sealed, the flexible plates and the pusher assemblies are both sealed with the installation box, and the bottom of the installation box, the two flexible plates and the two pusher assemblies jointly form an evaporation space;

[0007] A driving mechanism for driving each flexible board to move left and right is also provided in the installation box. Sliders are fixed at both the front and rear ends of the flexible board. The slides slide and cooperate with the pushing platform assembly at the corresponding end in the left and right directions. The pushing platform assembly is guided front and back and is assembled in the installation box with left and right limits, so that the flexible board has a straight state and a bent state during the left and right movement. When the flexible board changes from a bent state to a straight state, the crystals on the bottom of the installation box and the pushing platform assembly are scraped off and the crystals on the flexible board itself fall off.

[0008] An evaporation space is formed between the two flexible plates and the installation box. After the evaporation is completed, the two flexible plates are brought close to each other to clean the crystals on the push table assembly and the installation box. After the two flexible plates are transformed from a bent state to a straight state, the crystals on the flexible plates will fall off and be collected at the bottom of the installation box by the flexible plates, avoiding the need to manually remove the crystals after the crystallization is completed.

[0009] Preferably, the pushing table assembly includes two pushing tables arranged on the left and right and connected to the two flexible plates one by one. The two pushing tables on the same pushing table assembly slide and seal in the front-to-back direction. A pushing mechanism is also provided on the installation box. The pushing mechanism is used to push one of the flexible plates to move back and forth when the two flexible plates are close to and fit each other. The pushing table connected to the flexible plate is connected to the pushing mechanism. The pushing mechanism is used to cause relative displacement between the two pushing tables on the same pushing table assembly to rub off the unfallen crystals on the flexible plate.

[0010] Preferably, the pushing mechanism includes a pushing member and a reset member, one of the two pushing platforms connected to the same flexible board is provided with the pushing member, and the other pushing platform is installed with the reset member; the two pushing platforms on the same pushing platform assembly are caused to slide relative to each other through the pushing mechanism.

[0011] Preferably, a crystal collecting groove extending forward and backward is provided in the middle of the bottom of the installation box, and a through hole which can be closed and opened is provided in the middle of the collecting groove; the collection of crystals is facilitated by providing the collecting groove and the through hole.

[0012] Preferably, a folding plate assembly is installed on the side of the two flexible plates facing away from each other, which is used to make the flexible plates have multiple curved surfaces when they are in a bent state. The folding plate assembly includes multiple folding plates hinged to each other. The flexible plate is connected to the hinge axis between the two adjacent folding plates, and the folding plates at both ends are hinged to the pushing platform at the corresponding end. The folding plate assembly is used to make the bending angle of the flexible plate larger.

[0013] Preferably, the driving mechanism includes an elastic pull plate, both ends of which are hinged on two sliders respectively. The driving mechanism also includes an electric push rod which is arranged on the installation box and can be extended left and right, and the electric push rod is connected to the middle part of the elastic pull plate; the two flexible plates are moved away and bent through the driving mechanism.

[0014] Preferably, the electric push rod is fixed on the mounting box, the elastic pull plate is provided with a horizontal slot extending forward and backward, the movable end of the electric push rod is provided with two retaining rings, and the two retaining rings are arranged on the left and right sides of the elastic pull plate to avoid interference with the connection between the electric push rod and the elastic pull plate when the push platform moves.

[0015] Preferably, an elastic member is provided between the slider and the pushing platform, and the elastic member is used to apply a force to the slider to bring the two flexible plates closer to each other, so that when the flexible plates recover from a bent state to an extended state, the two flexible plates can fit together; by providing the elastic member, the two flexible plates can fit together when they are close to each other.

[0016] The present invention discloses an evaporation process of a calcium chloride production device, which uses the above calcium chloride production evaporation device, and comprises the following steps: S1, driving two flexible plates to move away from each other and bend by a driving mechanism, and installing the bottom of the box, the two flexible plates, and the two pusher platform components together to form an evaporation chamber;

[0017] S2, injecting calcium chloride solution into the evaporation chamber and evaporating it until the liquid in the evaporation space is completely evaporated, leaving calcium chloride crystals;

[0018] S3. The driving mechanism drives the two flexible plates to approach each other and transform into a straight state. In the process of the two flexible plates approaching each other, the crystals on the push table assembly and the bottom of the installation box are scraped off. In the process of the flexible plates transforming from a bent state to a straight state, the crystals on themselves fall off.

[0019] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0020] 1. Since the pushing platform assembly is guided along the front-to-back direction and is assembled in the installation box with left and right limits, the two flexible plates can bend when they move away from each other, and can change from a bent state to an extended state when the two flexible plates are close to each other, thereby causing the crystals on the flexible plates themselves to fall off; at the same time, since the front and rear ends of the flexible plates are in contact with the pushing platform assembly, the flexible plates can scrape off the crystals on the pushing platform assembly when they move left and right; the pushing platform assembly and the flexible plates can scrape off the crystals on the bottom of the installation box during the movement, without the need for manual scraping of the crystals, thus saving manpower.

[0021] 2. When two flexible plates are attached to each other, the pushing mechanism can drive one of the flexible plates to move forward and backward through the pushing platform, so that the two flexible plates can move forward and backward relative to each other and the remaining crystals on the flexible plates can be ground off.

[0022] 3. A collection tank is provided in the middle of the bottom of the installation box, and a through hole that can be closed and opened is provided to facilitate the centralized collection of crystals.

[0023] 4. The folding component can form multiple curved surfaces when the flexible board is in a bent state, which makes it easier for its own crystals to fall when it changes from a bent state to a straight state. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the appearance diagram of the calcium chloride production evaporation device of the present invention.

[0025] Figure 2 The first schematic diagram of the calcium chloride production evaporation device of the present invention after removing the box cover.

[0026] Figure 3 The second schematic diagram of the calcium chloride production evaporation device of the present invention after removing the box cover.

[0027] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0028] Figure 5 The top view of the calcium chloride production evaporation device of the present invention after removing the box cover.

[0029] Figure 6 The present invention is a schematic diagram of the cooperation between the elastic pull plate, the folding plate assembly, the push table assembly and the electric push rod in the calcium chloride production evaporation device of the present invention.

[0030] Figure 7 It is a schematic structural diagram of the flexible plate and folding plate assembly in the calcium chloride production evaporation device of the present invention.

[0031] Figure numerals: 1. Installation box; 11. Box bottom; 12. Box body; 13. Box cover; 14. U-shaped plate; 15. Arc plate; 2. Flexible plate; 3. Pushing platform assembly; 31. Slide; 32. Slide groove; 33. Sliding block; 34. Elastic member; 35. Horizontal slot; 36. Retaining ring; 4. Folding plate assembly; 5. Pushing mechanism; 51. Pushing member; 52. Resetting member; 521. Sleeve; 522. Movable rod; 523. Compression spring; 6. Driving mechanism; 61. Elastic pull plate; 62. Electric push rod; 7. Collecting trough; 8. Through hole. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0033] In the first embodiment of the present invention, the following technical solution is provided: a calcium chloride production evaporation device includes an installation box 1, a flexible plate 2, a pushing table assembly 3, a folding plate assembly 4, a driving mechanism 6, and a pushing mechanism 5.

[0034] like Figure 1-Figure 7As shown, the installation box 1 includes a box bottom 11, a box body 12 and a box cover 13, and also includes two U-shaped plates 14 arranged front to back and two arc-shaped plates 15 arranged left to right and fixed in the box body 12. The two arc-shaped plates 15 are connected to the U-shaped plates 14 on both sides. The box bottom 11 is also provided with a slide 31 extending in the front and back directions, which pushes the platform assembly 3 to slide and be sealedly connected with the slide 31.

[0035] In a specific embodiment of the present invention, the pushing platform assembly 3 includes two pushing platforms arranged on the left and right and connected to the two flexible plates 2 one by one. The two pushing platforms on the same pushing platform assembly are slidingly and sealedly matched along the front and rear directions. The two pushing platform assemblies are respectively slidably and sealedly connected to the U-shaped plate 14. When the two pushing platforms on the pushing platform assembly 3 slide in the slide 31 and approach each other, the flexible plate 2 is bent. A slide groove 32 is opened on each of the pushing platforms along the left and right directions, and a slider 33 is slidingly arranged in the slide groove 32. The slider 33 is sealed and slidably connected to the slide groove 32 and the pushing platform.

[0036] In a specific embodiment of the present invention, an elastic member 34 is arranged between the slider 33 and the pushing platform, so that the two flexible plates 2 can fit together when the flexible plates 2 are restored from a bent state to an extended state; when the elastic pull plate 61 is restored to a vertical state, the flexible plates 2 are fitted together under the push of the elastic members 34 on both sides. Specifically, the elastic member 34 is a spring, one end of the spring is connected to the installation box 1, and the other end is connected to the slider 33.

[0037] There are two flexible plates 2 arranged along the left and right directions, and the two ends of the flexible plate 2 are respectively sealed and connected to the two sliders 33. The end of the flexible plate 2 can contact the pushing platform. A sealing strip is provided at the bottom of the flexible plate 2. The flexible plate 2 is sealed and connected to the inner bottom wall of the installation box 1 in both the straight state and the bent state. When the sliders 33 are away from each other to the maximum distance in the slide groove 32, the two flexible plates 2 are in a bent state. At this time, the bottom 11 of the installation box 1, the two flexible plates 2, and the two pushing platform assemblies 3 jointly form an evaporation chamber.

[0038] In a specific embodiment of the present invention, a folding plate assembly 4 for making the flexible plate 2 have multiple curved surfaces is installed on one side of the two groups of flexible plates 2 away from each other, and each folding plate assembly 4 includes multiple folding plates, and adjacent folding plates are hinged, and the folding plates at both ends are hinged to the pushing platform; when calcium chloride evaporates, part of the crystals adhere to the flexible plate 2, and when the flexible plate 2 changes from a bent state to a straight state, the crystals will fall off from the flexible plate 2, and the greater the bending angle of the flexible plate 2, when the flexible plate 2 changes from a bent state to a straight state, the more the crystals will detach from the flexible plate 2. Thoroughly, by setting the folding plate assembly 4, the flexible plate 2 can be bent into a wave shape when it is bent. When the flexible plate 2 recovers from the bent state to the straight state, the calcium chloride crystals are separated more thoroughly. It should be noted that in order to avoid the flexible plate 2 bending in the same direction when it is bent, resulting in a small bending angle of the flexible plate 2, the torsion spring arranged between the two folding plates can make the folding plate have a tendency to bend in a zigzag shape in the initial position. When pressure is applied at both ends of the folding plate assembly 4, the folding plate assembly 4 bends in a zigzag shape. Since the flexible plate 2 is connected to the hinge shaft, the flexible plate 2 bends in a wave shape when it is bent.

[0039] When evaporating calcium chloride, the two flexible plates 2 are moved away from each other and bent by the driving mechanism 6, and the bottom 11 of the installation box 1, the two flexible plates 2, and the two pushing platform assemblies 3 jointly form an evaporation space, and the calcium chloride solution is poured into the evaporation chamber for evaporation. After the evaporation is completed, the flexible plate 2 is transformed from a bent state to an extended state by the driving mechanism 6, and the calcium chloride crystals attached to the flexible plate 2 will fall off at this time. When the two flexible plates 2 are close to each other, the crystals on the pushing platform assembly 3 are scraped off, and then the calcium chloride crystals that have not fallen off on the two flexible plates 2 are caused to fall off by the relative displacement of the two pushing platforms.

[0040] The driving mechanism 6 includes an elastic pull plate 61 and an electric push rod 62, the two ends of the elastic pull plate 61 are respectively hinged on two sliders 33, the electric push rod 62 is installed in the middle of the elastic pull plate 61, and is used to pull the elastic pull plate 61 to bend, one end of the electric push rod 62 is set on the inner wall of the installation box 1, and the other end is connected to the elastic pull plate 61; the electric push rod 62 pulls the elastic pull plate 61 to bend, and the elastic pull plate 61 bends to make the push platform slide in the slide 31, and the slider 33 slides in the slide groove 32, so that the two flexible plates 2 are moved away from each other and bent to form an evaporation space.

[0041] like Figure 6As shown, it should be noted that a horizontal slot 35 is provided on the elastic pull plate 61, and two retaining rings 36 are provided at the movable end of the electric push rod 62, and the two retaining rings 36 are respectively located on both sides of the horizontal slot 35; when the pushing platform assembly 3 slides in the slide 31, a relative displacement occurs between the movable end of the electric push rod 62 and the horizontal slot 35, so as to prevent the movement of the pushing platform from affecting the connection between the electric push rod 62 and the elastic pull plate 61.

[0042] After the solution in the evaporation cavity is completely evaporated, the electric push rod 62 restores the elastic pull plate 61 to a straight plate state, thereby restoring the folding plate assembly 4 to a straight line state. At the same time, under the action of the elastic member 34, the two flexible plates 2 slide toward each other, and under the action of the elastic member 34, the two flexible plates 2 are fitted together. It should be noted that in this process, both ends of the flexible plate 2 contact the pushing platform and scrape off the crystals on the inner wall of the pushing platform, and the bottom of the flexible plate 2 contacts the inner bottom wall of the installation box 1 and scrapes off the crystals on the inner bottom wall. The flexible plate 2 and the elastic pull plate 61 are both made of memory metal material, and the flexible plate 2 and the elastic pull plate 61 can still recover after bending.

[0043] In the specific implementation of the present invention, when the flexible board 2 is transformed from a bent state to a straight state, part of the crystals on the flexible board 2 will be removed. In order to ensure that the crystals on the flexible board 2 can be removed cleanly, a relative displacement occurs between the two flexible boards 2 through a pushing mechanism 5. The pushing mechanism 5 includes a pushing member 51 and a reset member 52. The pushing member 51 is an electric telescopic rod. The reset member 52 includes a sleeve 521, a movable rod 522 and a compression spring 523. One end of the electric telescopic rod is arranged on the U-shaped plate 14, and the other end is connected to the pushing platform assembly 3. The reset member 52 includes a sleeve 521 fixedly arranged on the U-shaped plate 14. 1, a movable rod 522 is slidably arranged in the sleeve 521, an abutment plate is arranged at the end of the movable rod 522, and a compression spring 523 is arranged between the abutment plate and the U-shaped plate 14; the pushing mechanism 5 makes the pushing platform slide in the slideway 31, at this time, the pushing platform on the other side will push the movable rod 522 to move and compress the compression spring 523, after the pushing member 51 shortens and loses the thrust on the pushing platform, the compression spring 523 rebounds and makes the pushing platform move in the opposite direction in the slideway 31, and the pushing member 51 makes the pushing platform reciprocate in the slideway 31 for many times, and the two flexible plates 2 rub against each other, so that the remaining crystals on the flexible plate 2 are removed.

[0044] A collecting groove 7 parallel to the flexible plate 2 is provided in the middle of the installation box 1, and a through hole 8 is provided in the middle of the collecting groove 7. The through hole 8 can be opened or closed. When the evaporation operation is performed, the through hole 8 is closed. When the evaporated crystals need to be removed, the through hole 8 is closed. The length of the collecting groove 7 is substantially equal to the length of the flexible plate 2 after being straightened. After the flexible plate 2 scrapes off the crystals on the push platform and the installation box 1, the crystals are directly pushed into the collecting groove 7, and it is convenient for the cleaning personnel to remove the crystals from the through hole 8.

[0045] An evaporation process of a calcium chloride production evaporation device comprises the following steps:

[0046] S1. The two flexible plates 2 are driven away from each other and in a bent state by a driving mechanism 6, and the bottom 11 of the installation box 1, the two flexible plates 2, and the two pusher assemblies 3 together form an evaporation chamber;

[0047] S2. Injecting calcium chloride solution into the evaporation chamber and evaporating until the liquid in the evaporation space is evaporated, leaving calcium chloride crystals;

[0048] S3. The two flexible plates 2 are driven to approach each other and transform into a straight state through the driving mechanism 6. In the process of the two flexible plates 2 approaching each other, the crystals on the push table assembly 3 and the bottom 11 of the installation box 1 are scraped off, and in the process of the flexible plate 2 transforming from a bent state to a straight state, the crystals on itself fall off.

[0049] In the second embodiment of the present invention, different from the first embodiment, the two pushing platforms on the pushing platform assembly 3 are integrated, and no relative displacement occurs between the two pushing platforms. At this time, there is no need to set up a pushing mechanism 5. In the specific implementation process, after the flexible board 2 is transformed from a bent state to a straight state, if the crystals on the flexible board 2 fall off more comprehensively and there is no large amount of attachment, this embodiment can be adopted.

[0050] In the third embodiment of the present invention, different from the first embodiment, the electric push rod 62 in the driving mechanism 6 can be replaced by a hydraulic rod.

[0051] In the fourth embodiment of the present invention, different from the first embodiment, the pushing mechanism 5 only includes a pushing member 51, the end of the pushing member 51 is fixedly connected to the pushing platform, and the pushing platform is driven by the pushing member 51 to perform reciprocating motion, thereby rubbing off the crystals on the flexible plate 2. The pushing member 51 in this embodiment can be replaced by a hydraulic rod.

[0052] Specific working principle:

[0053] The flexible plate 2 is bent by the driving mechanism 6. At this time, the two flexible plates 2 move away from each other and form an evaporation cavity between the two flexible plates 2 and the installation box 1. Calcium chloride solution is poured into the evaporation cavity and evaporated until the evaporation is completed. After the evaporation is completed, the driving mechanism 6 straightens the flexible plate 2, and the elastic member 34 makes the two flexible plates 2 fit together. During the process of the flexible plate 2 changing from a bent state to a vertical state, the crystals of the bent part of the flexible plate 2 fall off, and the two ends of the flexible plate 2 will push the crystals on the inner wall of the table to scrape off the crystals, and the bottom of the flexible plate 2 will scrape off the material on the bottom wall of the installation box 1, and then the remaining crystals on the flexible plate 2 are ground off by the relative displacement between the two flexible plates 2. The two flexible plates 2 push the crystals into the collecting tank 7 for the convenience of cleaning by the cleaning personnel. The above-mentioned evaporation device does not require the operator to clean the inner wall of the evaporation box, and only the fallen crystals need to be removed.

[0054] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A calcium chloride production evaporation device, comprising an installation box, characterized in that: Two flexible plates opposite to each other on the left and right and two pusher assemblies opposite to each other on the front and back are arranged in the installation box. The front and back ends of the flexible plates are respectively in contact with and sealed with the pusher assemblies. The flexible plates and the pusher assemblies are both sealed with the installation box. The bottom of the installation box, the two flexible plates and the two pusher assemblies jointly form an evaporation chamber. The installation box is also provided with a driving mechanism for driving each flexible board to move left and right. Slide blocks are fixedly provided at both the front and rear ends of the flexible board. The slide blocks slide and cooperate with the push table assembly at the corresponding end in the left and right directions. The push table assembly is guided front and back and is assembled in the installation box with left and right limit positions, so that the flexible board has a straight state and a bent state during the left and right movement. When the flexible board changes from the bent state to the straight state, the crystals on the bottom of the installation box and the push table assembly are scraped off and the crystals on the flexible board itself fall off. The driving mechanism includes an elastic pull plate, both ends of which are hinged on two sliders respectively, and the driving mechanism also includes an electric push rod which is arranged on the installation box and can be extended left and right, and the electric push rod is connected to the middle part of the elastic pull plate; The electric push rod is fixed on the installation box, the elastic pull plate is provided with a horizontal slot extending forward and backward, and the movable end of the electric push rod is provided with two retaining rings, which are respectively arranged on the left and right sides of the elastic pull plate.

2. A calcium chloride production evaporation device according to claim 1, characterized in that, The pushing platform assembly includes two pushing platforms arranged on the left and right and connected to the two flexible plates one by one. The two pushing platforms on the same pushing platform assembly slide and seal in the front-to-back direction. A pushing mechanism is also provided on the installation box. The pushing mechanism is used to push one of the flexible plates to move back and forth when the two flexible plates are close to and fitted to each other. The pushing platform connected to the flexible plate is connected to the pushing mechanism.

3. A calcium chloride production evaporation device according to claim 2, characterized in that, The pushing mechanism comprises a pushing member and a resetting member. The pushing member is installed on one of the two pushing platforms connected to the same flexible board, and the resetting member is installed on the other pushing platform.

4. A calcium chloride production evaporation device according to claim 1, 2 or 3, characterized in that, A crystal collecting groove extending forward and backward is arranged in the middle of the bottom of the installation box, and a through hole which can be closed and opened is arranged in the middle of the collecting groove.

5. A calcium chloride production evaporation device according to claim 2 or 3, characterized in that, A folding plate assembly is installed on the side where the two flexible plates are away from each other, which is used to make the flexible plates have multiple curved surfaces when they are in a bent state. The folding plate assembly includes multiple folding plates hinged to each other. The flexible plate is connected to the hinge axis between the two adjacent folding plates, and the folding plates at both ends are hinged to the pushing platform at the corresponding end.

6. A calcium chloride production evaporation device according to claim 2 or 3, characterized in that, An elastic member is provided between the slider and the pushing platform, and the elastic member is used to apply a force to the slider to bring the two flexible plates closer to each other, so that when the flexible plates are restored from a bent state to an extended state, the two flexible plates can fit each other.

7. An evaporation process of a calcium chloride production evaporation device, using the calcium chloride production evaporation device as claimed in any one of claims 1 to 6, comprising the following steps: S1, driving the two flexible plates away from each other and in a bent state through a driving mechanism, and the bottom of the installation box, the two flexible plates, and the two push platform components together form an evaporation chamber; S2, injecting calcium chloride solution into the evaporation chamber and evaporating it until the liquid in the evaporation space is completely evaporated, leaving calcium chloride crystals; S3. The driving mechanism drives the two flexible plates to approach each other and transform into a straight state. In the process of the two flexible plates approaching each other, the crystals on the push table assembly and the bottom of the installation box are scraped off. In the process of the flexible plates transforming from a bent state to a straight state, the crystals on themselves fall off.

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