Automatic defoaming type evaporating crystallizer

Abstract

The utility model discloses an automatic defoaming type evaporation crystallizer which comprises a shell, a heating evaporation assembly arranged in the shell, a feeding pipe arranged at the bottom of the shell and an air outlet pipe arranged at the top of the shell. The heating evaporation assembly comprises a uniform mixing assembly arranged in the shell, a floating plate assembly arranged on the inner wall of the shell in a sliding manner, and an electric heating rod arranged in the shell and used for heating a solution; the floating plate assembly comprises a first mounting plate, two second mounting plates of which one ends are fixedly connected with the first mounting plate and the other ends are connected with the inner wall of the shell in a sliding manner, and a defoaming assembly which is arranged on the second mounting plates and is used for puncturing foams; according to the utility model, the defoaming component is arranged at the hollow structure position on the surface of the floating plate component, so that foam floating on the surface of a solution after stirring can be effectively punctured, and the heat transfer efficiency of the evaporator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporation crystallization, in particular to an automatic defoaming evaporation crystallizer. Background Art

[0002] An evaporation crystallizer is a device used for the solute in a solution to crystallize by evaporating water. Its working principle is based on the fact that the concentration of the solution gradually increases as water evaporates. When the concentration reaches the saturation point, the solute begins to precipitate and form crystals. By controlling the temperature, pressure, and solution concentration during the evaporation process, effective separation and purification of the solute can be achieved. The evaporation crystallizer mainly consists of components such as a heater, an evaporator, a crystallizer, a condenser, a separator, and a control system. The heater is responsible for providing the heat required for evaporation. The evaporator is the main place for the solution to evaporate. The crystallizer is used to collect the precipitated crystals. The condenser is used to cool the evaporated steam. The separator is used to separate solids and liquids. The control system monitors and regulates the entire evaporation crystallization process. Evaporation crystallizers are widely used in industries such as chemical engineering, pharmaceuticals, food, and environmental protection. Specifically, it can be used to produce chemicals such as salts, sugars, amino acids, and antibiotics, and can also be used for salt removal and harmful substance concentration in wastewater treatment.

[0003] The main purpose of stirring in evaporation crystallization is to promote the uniform mixing of the liquid, prevent local concentration from being too high or too low, and accelerate the crystallization rate of the solute. When the stirrer rotates or moves in the solution, it breaks the surface tension of the liquid, causing some air to be entrained into the liquid, forming a large amount of foam. If these foams are not removed in time, they may overflow from the evaporator, resulting in material loss and environmental pollution. At the same time, the presence of foam will hinder heat transfer and reduce the heat transfer efficiency of the evaporator. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides an automatic defoaming evaporation crystallizer.

[0005] The technical solution of the utility model is: an automatic defoaming evaporation crystallizer, including a housing, a heating and evaporation assembly arranged in the housing, a feed pipe arranged at the bottom of the housing, and an air outlet pipe arranged at the top of the housing;

[0006] The heating and evaporation assembly includes a mixing assembly arranged in the housing, a floating plate assembly slidably arranged on the inner wall of the housing, and an electric heating rod arranged inside the housing for heating the solution; a first air column is provided between the floating plate assembly and the housing;

[0007] The mixing component includes a screw rod with one end rotatably connected to the bottom of the housing and the other end penetrating through the top of the housing, a driving unit arranged at the upper end of the screw rod, a mounting seat threadedly sleeved on the screw rod, and multiple groups of stirring blades circumferentially arranged on the mounting seat; the driving unit consists of a sealing cavity and an impeller arranged at the end of the screw rod; the screw rod is rotatably and sealingly connected to both the floating plate component and the bottom of the sealing cavity; the first air column is communicated with the sealing cavity through a pipeline.

[0008] Description: This evaporation crystallizer can use the upward movement of the floating plate component to further drive the mixing component, which can effectively reduce the use of motors. The mixing component can effectively promote the uniform mixing in the solution, prevent local concentration from being too high or too low, and thus accelerate the crystallization rate of the solute.

[0009] Furthermore, the floating plate component includes a first mounting plate, two second mounting plates with one end fixedly connected to the first mounting plate and the other end slidably connected to the inner wall of the housing, and a defoaming component arranged on the second mounting plate for foam piercing treatment; the second mounting plate is perpendicular to the first mounting plate, and a hollow structure is formed between the two second mounting plates.

[0010] Description: The above setting can install the defoaming component at the hollow structure position on the surface of the floating plate component, which can effectively pierce the foam floating on the surface of the solution after stirring, thereby improving the heat transfer efficiency of the evaporator.

[0011] Furthermore, a second air column is provided between the bottom of the mounting seat and the bottom of the housing;

[0012] The defoaming component includes a chute arranged in the second mounting plate, a rack on the inner wall of the chute, a rotating gear slidably arranged in the chute and meshing with the rack, a third air column with one end connected to the rotating shaft of the rotating gear and the other end connected to the inner wall of the chute, and a defoaming roller arranged on the rotating gear; the rotating shaft is rotatably connected to the rotating gear; thorns are circumferentially arranged on the defoaming roller, and the second air column is communicated with the third air column;

[0013] Description: The above setting can effectively utilize the vertical movement of the mounting seat inside the mixing component, so that the mounting seat acts on the second air column, further driving the horizontal movement of the rotating gear in the chute, and then realizing the rotational driving effect on the defoaming roller through the meshing transmission between the rack and the rotating gear, further piercing the foam on the surface layer of the solution. The above setting further reduces the power consumption of the device, is more environmentally friendly and has a lower cost.

[0014] Even further, the materials of the first mounting plate, the second mounting plate, and the defoaming roller are all made of EVA ethylene-vinyl acetate copolymer;

[0015] Description: The above settings can enable the floating plate assembly to better play the role of the floating plate, and also improve the processing efficiency of the foam removal assembly for the foam on the surface of the solution from another aspect.

[0016] Further, it further includes a refrigeration chamber which is inclinedly arranged in the shell and above the heating and evaporation assembly. A number of fine holes with a diameter of 0.3 - 0.5 mm are evenly arranged on the refrigeration chamber. One end of the refrigeration chamber is provided with a water inlet, and the other end is provided with a water outlet. An opening is provided on the refrigeration chamber. The screw rod passes through the opening, and a sealing gasket which is rotationally and sealingly connected with the inner wall of the opening is arranged at a position corresponding to the opening on the screw rod;

[0017] Description: The above settings are used to further process the aqueous solution evaporated into gas by the refrigeration chamber. When the water vapor still contains impurities, the low-temperature treatment will further promote the crystallization of this part of the impurities, so that the remaining part of the crystals adheres to the inside of the refrigeration chamber, thereby effectively improving the crystallization efficiency.

[0018] Further, the water inlet and the water outlet are respectively communicated with a refrigeration box. The refrigeration box is filled with water, and the temperature in the refrigeration box is -8 to -2 °C;

[0019] Description: At the above temperatures, the water vapor containing impurities is more likely to crystallize.

[0020] Further, the stirring blade includes a mounting block fixedly arranged on the surface of the mounting seat, a sinking groove arranged on the surface of the mounting block, a spring member arranged in the sinking groove, and a blade body slidably arranged in the sinking groove and connected with the spring member;

[0021] Description: The above settings can enable the blade body to effectively expand the stirring range under the action of centrifugal force, and the function of the spring member can enable the blade body to quickly reset.

[0022] The beneficial effects of the present utility model are:

[0023] (1) The present utility model can utilize the synergistic effect of the floating plate assembly and the mixing assembly, can effectively reduce the use of the motor, and can effectively promote the uniform mixing in the solution by the mixing assembly, prevent the local concentration from being too high or too low, thereby accelerating the crystallization rate of the solute. Through the setting of the refrigeration chamber, the situation where the water vapor contains impurities can be further processed, and the influence on the operating environment can also be reduced.

[0024] (2) The foam removing component of the present utility model is installed at the hollow structure position on the surface of the floating plate component, which can effectively puncture the foam floating on the surface of the solution after stirring, thereby improving the heat transfer efficiency of the evaporator. And by utilizing the synergistic effect of the mixing component and the foam removing component, the driving of the horizontal movement and rotational movement of the foam removing roller is realized, so as to effectively improve the foam removal efficiency of the foam removing component while reducing the use of motors. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the external structure of Embodiment 1 of the present utility model;

[0026] Figure 2 is a schematic diagram of the internal structure of Embodiment 1 of the present utility model;

[0027] Figure 3 is a schematic diagram of the positional relationship between the mixing component and the floating plate component of Embodiment 1 of the present utility model;

[0028] Figure 4 is Figure 3 a partial enlarged view of Location A of

[0029] Figure 5 is a schematic diagram of the positional relationship of the refrigeration chamber of Embodiment 2 of the present utility model;

[0030] Wherein, 1 - housing, 11 - feed pipe, 12 - air outlet pipe, 2 - heating and evaporation component, 21 - mixing component, 211 - screw, 212 - driving unit, 2121 - sealing cavity, 2122 - impeller, 213 - mounting seat, 2131 - second air column, 214 - stirring blade, 2141 - mounting block, 2142 - sinking groove, 2143 - spring member, 2144 - blade body, 22 - floating plate component, 221 - first mounting plate, 222 - second mounting plate, 223 - foam removing component, 2231 - rack, 2232 - rotating gear, 2233 - third air column, 2234 - foam removing roller, 2235 - puncturing needle, 23 - electric heating rod, 24 - first air column, 3 - refrigeration chamber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The present utility model will be further described in detail below in conjunction with the specific embodiments to better reflect the advantages of the present utility model.

[0032] Embodiment 1: As Figure 1 shown, an automatic defoaming evaporation crystallizer includes a housing 1, a heating and evaporation component 2 arranged in the housing 1, a feed pipe 11 arranged at the bottom of the housing 1, and an air outlet pipe 12 arranged at the top of the housing 1;

[0033] As Figure 2As shown, the heating and evaporation assembly 2 includes a mixing assembly 21 disposed within the housing 1, a floating plate assembly 22 slidably disposed on the inner wall of the housing 1, and an electric heating rod 23 disposed inside the housing 1 for heating the solution; a first air column 24 is provided between the floating plate assembly 22 and the housing 1; According to Figure 2 As shown, the electric heating rod 23 is specifically disposed at the inner bottom of the housing 1;

[0034] As Figure 2 、 Figure 3 As shown, the mixing assembly 21 includes a screw 211 having one end rotatably connected to the bottom of the housing 1 and the other end passing through the top of the housing 1, a driving unit 212 disposed at the upper end of the screw 211, a mounting seat 213 threadedly sleeved on the screw 211, and six groups of stirring blades 214 circumferentially disposed on the mounting seat 213; the driving unit 212 is composed of a sealing cavity 2121 and an impeller 2122 disposed at the end of the screw 211; the screw 211 is rotatably and sealingly connected to both the floating plate assembly 22 and the bottom of the sealing cavity 2121; the first air column 24 is communicated with the sealing cavity 2121 through a pipeline;

[0035] The stirring blade 214 includes a mounting block 2141 fixedly disposed on the surface of the mounting seat 213, a sink 2142 disposed on the surface of the mounting block 2141, a spring member 2143 disposed in the sink 2142, and a blade body 2144 slidably disposed in the sink 2142 and connected to the spring member 2143;

[0036] The floating plate assembly 22 includes a first mounting plate 221, two second mounting plates 222 having one end fixedly connected to the first mounting plate 221 and the other end slidably connected to the inner wall of the housing 1, and a defoaming assembly 223 disposed on the second mounting plate 222 for piercing foam; the second mounting plate 222 is perpendicularly disposed with respect to the first mounting plate 221, and a hollow structure is formed between the two second mounting plates 222;

[0037] A second air column 2131 is provided between the bottom of the mounting seat 213 and the bottom of the housing 1;

[0038] As Figure 4 As shown, the defoaming assembly 223 includes a chute disposed within the second mounting plate 222, a rack 2231 on the inner wall of the chute, a rotating gear 2232 slidably disposed within the chute and meshing with the rack 2231, a third air column 2233 having one end connected to the rotating shaft of the rotating gear 2232 and the other end connected to the inner wall of the chute, and a defoaming roller 2234 disposed on the rotating gear 2232; the rotating shaft is rotatably connected to the rotating gear 2232; thorns 2235 are circumferentially disposed on the defoaming roller 2234, and the second air column 2131 is communicated with the third air column 2233;

[0039] The materials of the first mounting plate 221, the second mounting plate 222, and the demisting roller 2234 are all made of EVA ethylene-vinyl acetate copolymer;

[0040] The working principle of this embodiment is as follows: The solution is introduced into the shell 1 along the feed pipe 11. The electric heating rod 23 is turned on to heat the inside of the solution. Then, as the solution increases, the floating plate assembly 22 moves upward, and then the first air column 2131 is compressed. The gas enters the sealing cavity 2121, drives the impeller 2122, and drives the screw 211 to rotate, so that the stirring blades 214 at the bottom quickly stir the inside of the solution, further promoting the evaporation and crystallization efficiency. Then, as the water evaporates, the concentration of the solution gradually increases. When it reaches the saturation point, the solute begins to precipitate and form crystals, staying on the bottom surface of the shell 1. At the same time, the demisting assembly 223 is used to pierce the foam on the surface of the solution. After the water evaporates into water vapor, it is discharged along the air outlet 12.

[0041] Embodiment 2: The difference between this embodiment and Embodiment 1 is that, as Figure 5 shown, it further includes a refrigeration cavity 3 disposed in the shell 1 at an inclination of 30° and located above the heating and evaporation assembly 2. A number of fine holes with a diameter of 0.4 mm are evenly opened on the refrigeration cavity 3. One end of the refrigeration cavity 3 is provided with a water inlet, and the other end is provided with a water outlet. There is an opening on the refrigeration cavity 3, and a sealing gasket is provided at a position corresponding to the opening on the screw 211 and is rotationally and sealingly connected to the inner wall of the opening; it can be understood that during the rotation of the screw 211, the outside of the sealing gasket is always sealingly connected to the opening, and the inside is always sealingly connected to the screw 211 to ensure that the water vapor will not directly flow out along the opening, achieving the purpose of enhancing the further treatment effect of the refrigeration cavity 3 on the water vapor;

[0042] The water inlet and the water outlet are respectively connected to the refrigeration box. The refrigeration box is filled with water, and the temperature inside the refrigeration box is -8°C.

[0043] The working principle of this embodiment is basically the same as that of Embodiment 1. The difference is that the water vapor after water evaporation contacts the refrigeration cavity 3. If the water vapor does not contain impurities, the gas flows out through the fine holes on the surface of the refrigeration cavity 3 and is discharged along the air outlet 12. If the water vapor contains impurities, the impurities further crystallize when cooled, further improving the crystallization efficiency and also reducing the pollution to the environment caused by the direct discharge of the water vapor.

Claims

1. An automatic defoaming evaporation crystallizer, characterized in that: It comprises a shell (1), a heating and evaporating component (2) arranged in the shell (1), a feed pipe (11) arranged at the bottom of the shell (1), and an air outlet pipe (12) arranged at the top of the shell (1); The heating evaporation component (2) comprises a mixing component (21) arranged in the shell (1), a floating plate component (22) slidably arranged on the inner wall of the shell (1), and an electric heating rod (23) arranged inside the shell (1) for heating the solution; a first air column (24) is provided between the floating plate component (22) and the shell (1); The mixing component (21) comprises a screw (211) having one end rotatably connected to the bottom of the shell (1) and the other end penetrating the top of the shell (1), a driving unit (212) arranged at the upper end of the screw (211), a mounting seat (213) threadedly sleeved on the screw (211), and a plurality of groups of stirring blades (214) circumferentially arranged on the mounting seat (213); the driving unit (212) is composed of a sealed cavity (2121) and an impeller (2122) arranged at the end of the screw (211); the screw (211) is rotatably sealedly connected to the floating plate component (22) and the bottom of the sealed cavity (2121); and the first air column (24) is connected to the sealed cavity (2121) via a pipeline.

2. An automatic defoaming evaporation crystallizer as claimed in claim 1, characterized in that: The floating plate assembly (22) comprises a first mounting plate (221), two second mounting plates (222) one end of which is fixedly connected to the first mounting plate (221) and the other end of which is slidably connected to the inner wall of the shell (1), and a defoaming assembly (223) arranged on the second mounting plate (222) and performing a foam puncture treatment; the second mounting plate (222) is arranged perpendicular to the first mounting plate (221), and a hollow structure is formed between the two second mounting plates (222).

3. An automatic defoaming evaporation crystallizer as claimed in claim 2, characterized in that: A second air column (2131) is provided between the bottom of the mounting seat (213) and the bottom of the housing (1); The defoaming assembly (223) includes a slide groove arranged in the second mounting plate (222), the inner wall of the slide groove has a rack (2231), a rotating gear (2232) meshing with the rack (2231) is slidably arranged in the slide groove, a third air column (2233) connected to the rotating shaft of the rotating gear (2232) at one end and connected to the inner wall of the slide groove at the other end, and a defoaming roller (2234) arranged on the rotating gear (2232); the rotating shaft is rotatably connected to the rotating gear (2232); a needle (2235) is circumferentially arranged on the defoaming roller (2234), and the second air column (2131) is connected to the third air column (2233).

4. An automatic defoaming evaporation crystallizer as claimed in claim 3, characterized in that: The first mounting plate (221), the second mounting plate (222), and the foam removal roller (2234) are all made of EVA ethylene-vinyl acetate copolymer.

5. The automatic defoaming evaporation crystallizer according to claim 1, characterized in that: It also comprises a refrigeration chamber (3) which is obliquely arranged in the shell (1) and located above the heating evaporation component (2), the refrigeration chamber (3) being evenly provided with a plurality of fine holes with a diameter of 0.3 to 0.5 mm, and a water inlet is provided at one end of the refrigeration chamber (3) and a water outlet is provided at the other end, the refrigeration chamber (3) is provided with an opening, the screw (211) passes through the opening, and a sealing gasket which is rotatably sealed and connected to the inner wall of the opening is provided at a position on the screw (211) corresponding to the opening.

6. An automatic defoaming evaporation crystallizer as claimed in claim 5, characterized in that: The water inlet and the water outlet are respectively connected to a refrigeration box, the refrigeration box is filled with water, and the temperature in the refrigeration box is -8 to -5°C.

7. The automatic defoaming evaporation crystallizer according to claim 1, characterized in that: The stirring blade (214) comprises a mounting block (2141) fixedly arranged on the surface of the mounting seat (213), a recessed groove (2142) arranged on the surface of the mounting block (2141), a spring member (2143) arranged in the recessed groove (2142), and a blade body (2144) slidably arranged in the recessed groove (2142) and connected to the spring member (2143).

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