Freeze concentration device

Abstract

The invention belongs to the technical field of freeze concentration, and relates to a freeze concentration device which comprises a dissolving assembly and a gas treatment assembly, the dissolving assembly comprises a rotating assembly and a fixing assembly; the rotating assembly is a cylindrical jacket box body, the inner side wall of the box body is composed of an air hole plate, and the outer wall is a filtering mechanism; the fixing assembly comprises a fixing shaft and a solution receiving device; the rotating assembly is arranged on the fixed shaft, the solution receiving device is fixed on the fixed shaft and surrounds the rotating assembly, the fixed assembly is provided with a gas inlet, the solution receiving device is provided with a gas outlet, and a channel is formed between the filtering mechanism of the rotating assembly and the inner side wall of the solution receiving device; dry gas treated by the gas treatment assembly passes through a tubular gas pore plate on the fixed shaft, enters the rotating assembly and penetrates through the crushed frozen material; solutions with different concentrations are received in sections to realize freeze concentration.

Description

Technical Field

[0001] The invention belongs to the technical field of freeze concentration, and in particular relates to a freeze concentration device. Background Art

[0002] Among the existing freeze concentration methods, there are mainly two types of freeze concentration methods with two different physical principles. The first type: a concentration technology that uses the solid-liquid phase relationship of a substance below the crystallization point (such as using an aqueous solution at the freezing point); for example, when the solvent is water, the concentration is achieved by freezing the water into ice crystals and removing the solvent (water) in a solid form through solid-liquid separation (separation of ice crystals from concentrated solution). The second type: a technical method for freeze concentration that uses the negative correlation between the melting point and the solute content (concentration); that is, a method of heating and dissolving the frozen material and collecting dissolved solutions of different concentrations to achieve a concentrated freeze concentration method.

[0003] The first freeze concentration method is a concentration technology that uses the solid-liquid phase relationship between a dilute solution and ice below the freezing point. There are two main methods: suspended crystallization freeze concentration and progressive freeze concentration. The principle of the suspended crystallization freeze concentration method is that when a dilute solution is frozen, the free small ice crystals suspended in the liquid are continuously removed to increase the liquid concentration. The principle of the progressive freeze concentration method is that when a dilute solution is frozen, as the ice layer is generated and grows on the cooling surface, the solute near the solid-liquid interface is removed to the liquid phase side, resulting in a concentration method in which the mass concentration of the solute in the liquid phase gradually increases. The existing freeze concentration methods have complex equipment structures, high equipment costs and production costs, and low efficiency.

[0004] The second freeze concentration method: using the negative correlation between melting point and solute content (concentration), concentration is achieved by heating, dissolving and separating the frozen material. For example, when ice melts naturally, a relatively high concentration solution will be dissolved first. Using this phenomenon, the concentration of the dilute solution can be increased by freezing the solution into a solid and then dissolving it multiple times. This is a freeze concentration method using the natural dissolution of ice. In addition, the natural dissolution of ice is a way of dissolving by heat. Similarly, heating and dissolving ice in other ways will also produce a concentrated solution, achieving freeze concentration. At present, the concentration effect and efficiency of this method are very low.

[0005] The above two freeze concentration methods based on different physical principles have a major problem: the effect and efficiency of freeze concentration are low. In particular, the existing freeze concentration method of heating and dissolving (traditional conventional heating method) has a lower concentration effect and efficiency than the existing method of using the solid-liquid phase relationship of the substance below the crystallization point (such as using the aqueous solution at the freezing point) to achieve concentration.

[0006] The reason that affects the concentration effect and efficiency of the first freeze concentration method is that the physical principle it adopts inevitably leads to the problem of solute entrainment during solid-liquid separation. The separation effect of ice crystals and the control of solute loss caused by ice crystal entrainment are extremely important for the successful application of freeze concentration under this physical principle, which is also one of the reasons for the complex structure, high equipment cost and complex operation of existing freeze concentration equipment.

[0007] The second freeze concentration method can solve the solute entrainment problem of the first method. However, there are factors that affect the concentration effect and efficiency of the second freeze concentration method: factors such as the dense ice layer with low solute content on the cooling surface of the frozen material and the solid structure inside the frozen material will hinder the heat transfer when it is heated and dissolved, as well as the separation and outflow of the dissolved solution of the frozen material. These two hindering factors seriously affect the concentration effect and efficiency of the freeze concentration under this method. Summary of the invention

[0008] In order to solve the problems existing in the prior art, the present invention proposes a freeze concentration device, which adopts a method of using dry gas as an energy medium and allowing it to penetrate broken frozen materials to transfer heat. The problem of adverse effects on heat conduction or radiation caused by the irregular arrangement (stacking) of the broken frozen materials and the existence of gaps (including air in the gaps) between the broken frozen materials, which affects the further improvement of the freeze concentration effect and efficiency, is solved. The centrifugal force is used to improve the separation efficiency of the solution, thereby improving the freeze concentration effect and efficiency.

[0009] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions: A freezing concentration device comprises: a dissolution component and a gas processing component; The dissolving assembly includes a rotating assembly and a fixed assembly; the rotating assembly is a cylindrical jacketed box, the inner wall of the box is composed of a gas hole plate (i.e., a plate with holes evenly distributed for gas to pass through), and the outer wall is a filtering mechanism; the fixed assembly includes a fixed shaft and a solution receiving device; the rotating assembly is arranged on the fixed shaft, the solution receiving device is fixed on the fixed shaft and surrounds the rotating assembly, the fixed assembly is provided with a gas inlet, the solution receiving device is provided with a gas outlet, and a channel is formed between the filtering mechanism of the rotating assembly and the inner wall of the solution receiving device (the channel is both a gas channel and a solution channel); The dry gas processed by the gas processing component enters the rotating component through the fixed shaft and passes through the crushed frozen material, and then is discharged through the gas outlet. The dissolved solution flows out through the channel, and the solution is retained in sections to obtain solutions of different concentrations to achieve freeze concentration.

[0010] As a preferred embodiment of the freeze concentration device described in the present invention, the gas processing component includes a gas drying device, a gas temperature regulating device, and a fan which are connected in sequence.

[0011] As a preferred embodiment of the freezing concentration device described in the present invention, the fixed component also includes a pore tube (i.e. a tube with evenly distributed holes for gas to pass through) mounted on the fixed shaft, and the dry gas enters the rotating component through the pore tube on the fixed shaft.

[0012] As a preferred embodiment of the freezing concentration device described in the present invention, the filtering mechanism is a filter screen or a filter membrane.

[0013] As a preferred embodiment of a freezing concentration device described in the present invention, wherein: As a preferred embodiment of a freezing concentration device described in the present invention, wherein: the axial length of the air hole plate is equal to or slightly smaller than the axial length of the internal space of the rotating component.

[0014] As a preferred embodiment of the freezing concentration device described in the present invention, the dilute solution is frozen into solid frozen material in other refrigeration equipment; and the frozen material is crushed in other equipment.

[0015] As a preferred embodiment of the freezing concentration device described in the present invention, the drying gas is air or nitrogen.

[0016] As a preferred embodiment of the freezing concentration device described in the present invention, the gas inlet is connected to the fan, and the gas outlet is connected to the gas drying equipment, so that the dry gas can be recycled after treatment.

[0017] As a preferred embodiment of the freezing concentration device described in the present invention, the device further comprises a bracket, and the fixing assembly is fixed to the bracket via a fixing shaft.

[0018] As a preferred embodiment of the freezing concentration device described in the present invention, the motor is connected to the rotating assembly via a power transmission belt to provide rotational power to the rotating assembly.

[0019] As a preferred solution of the freezing concentration device described in the present invention, the motor is installed on the bracket.

[0020] As a preferred embodiment of the freezing concentration device described in the present invention, the solution receiving device is provided with a solution outlet, and the solution outlet is provided with a solution outlet valve.

[0021] As a preferred embodiment of the freezing concentration device described in the present invention, the device further includes a control component for realizing the operation of the device and the control of the heat source switch and temperature.

[0022] As a preferred embodiment of the freezing concentration device described in the present invention, the fixed axis is arranged along the horizontal direction or along the vertical direction.

[0023] To solve the above technical problem, according to another aspect of the present invention, the present invention provides the following technical solution: The above-mentioned freezing concentration device is used in the fields of food, cosmetics, biomedicine, petrochemical industry, environmental protection treatment, etc.

[0024] The above-mentioned freezing concentration device is used in the fields of milk, vinegar (vinegar-containing food, beverages, condiments, etc.), wine, beverages (such as juice, coffee, tea, soy milk, soy milk, etc.), chemical liquid, Chinese herbal liquid, plant extract, petroleum purification, chemical purification, seawater purification, wastewater treatment, etc.

[0025] An application of the above-mentioned freezing concentration device in the field of freezing concentration and separation and purification of heat-sensitive raw materials.

[0026] The above-mentioned freezing concentration device is used in the fields of freezing concentration and separation and purification of milk, vinegar (vinegar-containing food, beverages, condiments, etc.), wine, beverages (such as juice, coffee, tea, soy milk, soy milk, etc.), chemical liquid, Chinese herbal liquid, plant extract, seawater purification, petroleum purification, chemical purification, wastewater treatment, etc.

[0027] The beneficial effects of the present invention are as follows: The present invention proposes a freezing concentration device, comprising a dissolving component and a gas processing component; the dissolving component comprises a rotating component and a fixed component; the rotating component is a cylindrical jacketed box, the inner wall of the box body is composed of an air hole plate, and the outer wall is a filtering mechanism; the fixed component comprises a fixed shaft and a solution receiving device; the rotating component is arranged on the fixed shaft, the solution receiving device is fixed on the fixed shaft and surrounds the rotating component, the fixed component is provided with a gas inlet, the solution receiving device is provided with a gas outlet, and a channel is formed between the filtering mechanism of the rotating component and the inner wall of the solution receiving device; the dry gas processed by the gas processing component enters the rotating component through the fixed shaft and passes through the crushed frozen material, and then is discharged through the gas outlet, the dissolved solution flows out through the channel, and the solution is retained in sections to obtain solutions of different concentrations, thereby realizing freezing concentration. The present invention adopts a method of using dry gas as an energy medium and allowing it to penetrate broken frozen materials to transfer heat, thereby solving the problem that the broken frozen materials have irregular arrangement (stacking) of frozen materials and there are gaps (including air in the gaps) between the frozen materials, which have an adverse effect on heat conduction or radiation and affect the further improvement of the freeze concentration effect and efficiency. The present invention also uses centrifugal force to improve the separation efficiency of the solution, thereby improving the freeze concentration effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 It is a schematic cross-sectional view of a freezing concentration device of the present invention.

[0030] In the figure, 1-crushed frozen material, 2-rotating component, 3-filtering mechanism, 4-solution receiving device, 5-solution outlet, 6-box cover, 6a-solution receiving device cover, 7-air hole tube, 8-transmission mechanism, 8a-closing component, 9-bracket, 10-motor, 11-power conveyor belt, 12-control component, 13-air hole plate, 13a-fixed shaft, 14-channel, 15-fan, 16-gas temperature regulating device, 17-gas drying device, 18-gas inlet, 19-gas outlet.

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The present invention provides a freezing concentration device, such as Figure 1 As shown, it includes: a dissolving component and a gas processing component; The dissolving assembly includes a rotating assembly 2 and a fixed assembly; the rotating assembly 2 is a cylindrical jacket box, the inner wall of the box is composed of an air hole plate 13 (i.e., a plate with holes evenly distributed for gas to pass through), and the outer wall is a filtering mechanism 3; the fixed assembly includes a fixed shaft 13a and a solution receiving device 4; the rotating assembly 2 is arranged on the fixed shaft 13a through a transmission mechanism 8, the solution receiving device 4 is fixed on a bracket 9 and the fixed shaft 13a and surrounds the rotating assembly 2, the bracket 9 is provided with a gas inlet 18, and is connected to the air hole tube 7 through a conduit; the solution receiving device 4 is provided with a gas outlet 19, and a channel 14 (which is both a gas channel and a solution channel) is formed between the filtering mechanism 3 of the rotating assembly 2 and the inner wall of the solution receiving device 4; The dry gas processed by the gas processing component passes through the fixed axis gas inlet 18, enters the rotating component 2 through the pore tube 7 and passes through the crushed frozen material 1, and then is discharged through the gas outlet 19. The dissolved solution flows out through the channel 14, and the solution is retained in sections to obtain solutions of different concentrations to achieve freeze concentration.

[0034] In one embodiment of the present invention, the gas processing assembly includes a gas drying device 17, a gas temperature regulating device 16, and a fan 15 which are connected in sequence.

[0035] In one embodiment of the present invention, the filtering mechanism 3 is a filter screen or a filter membrane.

[0036] In one embodiment of the present invention, the drying gas is air or nitrogen, or other gases that do not affect the freeze concentration process.

[0037] In one embodiment of the present invention, the gas inlet 18 is connected to the fan 15, and the gas outlet 19 is connected to the gas drying device 17, so that the dried gas can be recycled after treatment. The gas circulation can be, for example, as follows Figure 1 As shown, the gas forms a gas circulation loop between the dissolving component, the gas drying device 17, the gas temperature regulating device 16, and the fan 15; the energy medium gas is continuously dried, the temperature is adjusted, and the crushed solid is heated and dissolved in the circulation loop. The gas drying device 17 is a condensing device, and condensate (containing a small amount of beneficial substances) will be obtained in the gas drying device 17; the gas temperature regulating device 16 is a heat exchange device. The reasonable cooperation between the two can utilize the refrigerant and waste heat of the refrigeration equipment to save energy.

[0038] In one embodiment of the present invention, the device further comprises a bracket 9 , the fixing assembly is fixed to the bracket 9 via a fixing shaft 13 a , and a reinforcement structure connected to the bracket 9 is disposed on the outer side of the side wall of the solution receiving device 4 of the fixing assembly.

[0039] In one embodiment of the present invention, the rotating assembly 2 is arranged on the fixed shaft 13 a through transmission mechanisms 8 at both ends. The transmission mechanism 8 is connected to the motor 10 through a power transmission belt 11 to provide rotational power to the rotating assembly 2 .

[0040] In one embodiment of the present invention, the motor 10 is mounted on the bracket 9 .

[0041] In one embodiment of the present invention, the solution receiving device 4 is provided with a solution outlet 5, and the solution outlet 5 is provided with a solution outlet valve.

[0042] In one embodiment of the present invention, the device further comprises a control component 12 for realizing the control of the device action and the airflow.

[0043] In one embodiment of the present invention, the fixed axis 13a is arranged in the horizontal direction or in the vertical direction (such as Figure 1 ) settings.

[0044] In one embodiment of the present invention, the sealing between the solution receiving device 4 and the transmission mechanism 8 is achieved by a sealing component 8a.

[0045] In one embodiment of the present invention, a solution receiving device cover 6 a is provided on the top of the solution receiving device 4 , which cooperates with the box cover 6 to feed the crushed frozen material 1 into the rotating assembly 2 .

[0046] In one embodiment of the present invention, the device further comprises a control component 12 for realizing the operation of the device and the control of the heat source switch and temperature.

[0047] In one embodiment of the present invention, the fixed axis 13a is arranged in the horizontal direction or in the vertical direction (such as Figure 1 ) settings.

[0048] When freeze concentration is performed using the freeze concentration device of the present invention, the dilute solution is frozen into a solid or a solid-liquid mixture in the freezing device, the solid or solid-liquid mixture is crushed to obtain the crushed frozen material 1 which is loaded into the box of the rotating component 2, the box cover 6 and the solution receiving device cover 6a are tightly closed, the energy medium gas (such as nitrogen, air, etc.) is treated in the gas drying device 17 to obtain a dry energy medium gas, the dry energy medium gas is heated to the required temperature in the gas temperature regulating device 16, and then passes through the fan 15 through the gas inlet 18 to the pore tube 7, and enters the rotating component through the pore plate 13 2, passes through the crushed frozen material 1 and transfers heat to it, and the gas passing through the crushed frozen material 1 passes through the channel 14 and leaves the box through the gas outlet 19. During this period, the rotation speed of the rotating component 2 is set by the control component 12, and the rotation control switch is turned on to make the rotating component 2 start to rotate. After the solution passes through the filtering mechanism 3 under the action of centrifugal force, it enters the solution receiving device 4 through the channel 14; through the solution outlet 5 and the solution outlet valve, the solution is retained in sections, and the solution that meets the target concentration is retained for standby use, and the solution that does not meet the target concentration is continuously frozen and dissolved using the freezing concentration device to achieve dilute solution concentration.

[0049] In one embodiment of the present invention, the gas passes through the connection port (gas inlet 18 and gas outlet 19) to form a gas circulation loop among the dissolving component, the gas drying device 17, the gas temperature regulating device 16, and the fan 15; the energy medium gas is continuously dried, the temperature is adjusted, and the crushed solid is heated and dissolved in the circulation loop.

[0050] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A freeze concentration device, characterized in that: include: Dissolution components, gas handling components; The dissolving component includes a rotating component and a fixed component; The rotating assembly is a cylindrical jacketed box, the inner wall of the box is composed of an air hole plate, and the outer wall is a filtering mechanism; the fixed assembly includes a fixed shaft and a solution receiving device; the rotating assembly is arranged on the fixed shaft, the solution receiving device is fixed on the fixed shaft and surrounds the rotating assembly, the fixed assembly is provided with a gas inlet, the solution receiving device is provided with a gas outlet, and a channel is formed between the filtering mechanism of the rotating assembly and the inner wall of the solution receiving device; The dry gas processed by the gas processing component enters the rotating component through the fixed shaft and passes through the crushed frozen material, and then is discharged through the gas outlet. The dissolved solution flows out through the channel, and the solution is retained in sections to obtain solutions of different concentrations to achieve freeze concentration.

2. The freeze concentration device according to claim 1, characterized in that: The gas processing assembly includes a gas drying device, a gas temperature regulating device, and a fan which are connected in sequence.

3. The freeze concentration device according to claim 1, characterized in that: The fixed component also includes an air hole tube sleeved on the fixed shaft, and the dry gas enters the rotating component through the air hole tube on the fixed shaft.

4. The freeze concentration device according to claim 1, characterized in that: The dilute solution is frozen into solid frozen material in other refrigeration equipment; the frozen material is crushed in other equipment.

5. The freeze concentration device according to claim 1, characterized in that: The drying gas is air or nitrogen.

6. The freeze concentration device according to claim 1, characterized in that: The gas inlet is connected to the fan, and the gas outlet is connected to the gas drying equipment, so that the dry gas can be recycled after being processed.

7. The freeze concentration device according to claim 1, characterized in that: The motor is connected to the rotating component through a power transmission belt, and is used to provide rotational power to the rotating component.

8. The freeze concentration device according to claim 1, characterized in that: The solution receiving device is provided with a solution outlet, and the solution outlet is provided with a solution outlet valve.

9. Application of the freezing concentration device according to any one of claims 1 to 8 in the fields of food, cosmetics, biomedicine, and environmental protection treatment.

10. Application of the freezing concentration device according to any one of claims 1 to 8 in the fields of milk, vinegar, wine, beverages, chemical liquids, Chinese herbal medicine liquids, plant extracts, seawater purification, and wastewater treatment.

Images