A freezing concentration device

Abstract

The present invention belongs to the technical field of freeze concentration, and relates to a freeze concentration device, including a dissolution component and a gas processing component; a filter element is arranged in the dissolution component, and the filter element divides the dissolution component into two parts, the upper part of the dissolution component is used to load the crushed solid, and the lower part of the dissolution component is used to load the dissolved solution; the gas processing component includes a gas drying device, a gas temperature regulating device, and a fan connected in sequence; a gas inlet is arranged on the side wall or the top of the upper part of the dissolution component, and the gas inlet is connected to the fan outlet, and a gas outlet is arranged on the side wall of the lower part of the dissolution component. The dry gas entering from the gas inlet is an energy medium, which penetrates the crushed solid in the upper part of the dissolution component and transfers heat, and then is discharged from the gas outlet of the lower part of the dissolution component, and the dissolved solution enters the lower part of the dissolution component through the filter element, and the solution is retained in sections to obtain solutions of different concentrations, thereby realizing the freeze concentration of the dilute solution.

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 main purpose of the present invention is to provide a freezing concentration device.

[0009] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0010] A freezing concentration device, comprising:

[0011] Dissolution components, gas handling components;

[0012] The dissolving component is provided with a filter element, which divides the dissolving component into two parts: the upper part of the dissolving component is used to load the crushed solid, the crushed solid is obtained by crushing the solid or solid-liquid mixture frozen from the dilute solution, and the lower part of the dissolving component is used to load the dissolved solution;

[0013] The gas processing assembly includes a gas drying device, a gas temperature regulating device, and a fan connected in sequence;

[0014] A gas inlet is arranged on the upper side wall or the top of the dissolving component, the gas inlet is connected to the fan outlet, and a gas outlet is arranged on the lower side wall of the dissolving component.

[0015] As a preferred embodiment of the freezing concentration device described in the present invention, a pore plate (i.e. a plate with evenly distributed holes for gas to pass through) is also provided on the upper part of the dissolution component, and the pore plate is arranged at a position lower than the gas inlet and higher than the upper surface of the loaded crushed solid.

[0016] As a preferred embodiment of the freezing concentration device described in the present invention, the area of ​​the pore plate is equal to or slightly smaller than the cross-sectional area of ​​the internal space of the dissolution component.

[0017] As a preferred embodiment of the freezing concentration device described in the present invention, a solution outlet is provided at the bottom of the lower part of the dissolution component.

[0018] As a preferred embodiment of the freezing concentration device described in the present invention, the filter element is a filter screen or a membrane.

[0019] As a preferred embodiment of the freezing concentration device described in the present invention, the dilute solution is frozen into a solid in other freezing equipment; and the solid formed by freezing the dilute solution is crushed in other equipment.

[0020] As a preferred embodiment of the freezing concentration device described in the present invention, a cover body may be provided on the top of the dissolving component, and the gas inlet and the air hole plate are both provided on the cover body.

[0021] As a preferred embodiment of the freezing concentration device described in the present invention, the dry gas entering from the gas inlet is an energy medium, which penetrates the crushed solid in the upper part of the dissolution component and transfers heat, and is then discharged from the gas outlet of the lower part of the dissolution component. The dissolved solution enters the lower part of the dissolution component through the filter element, and the solution is retained in sections to obtain solutions of different concentrations.

[0022] As a preferred embodiment of the freezing concentration device described in the present invention, the drying gas is air or nitrogen.

[0023] As a preferred embodiment of the freeze concentration device described in the present invention, the gas outlet is connected to a gas drying device so that the dry gas can be recycled after being processed.

[0024] To solve the above technical problem, according to another aspect of the present invention, the present invention provides the following technical solution:

[0025] The above-mentioned freezing concentration device is used in the fields of food, cosmetics, biomedicine, petrochemical industry, environmental protection treatment, etc.

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

[0027] An application of the above-mentioned freezing concentration device in the field of freezing concentration and separation and purification of heat-sensitive raw materials.

[0028] The above-mentioned freezing concentration device is used in the fields of freezing concentration and separation and purification of milk, wine, vinegar (including raw materials containing vinegar, vinegar beverages, condiments), beverages (such as juice, coffee, tea, soy milk, soy milk, etc.), chemical liquids, Chinese herbal medicine liquids, plant extracts, seawater purification, petroleum purification, chemical purification, wastewater treatment, etc.

[0029] The beneficial effects of the present invention are as follows:

[0030] The present invention proposes a freezing concentration device, including a dissolving component and a gas processing component; a filter element is arranged in the dissolving component, and the filter element divides the dissolving component into two parts: the upper part of the dissolving component is used to load the crushed solid, and the crushed solid is obtained by crushing the solid or solid-liquid mixture frozen from the dilute solution, and the lower part of the dissolving component is used to load the dissolved solution; the gas processing component includes a gas drying device, a gas temperature regulating device, and a fan connected in sequence; a gas inlet is arranged on the side wall or the top of the upper part of the dissolving component, and the gas inlet is connected to the fan outlet, and a gas outlet is arranged on the side wall of the lower part of the dissolving component. The dry gas entering from the gas inlet is an energy medium, which penetrates the crushed solid in the upper part of the dissolving component and transfers heat, and then is discharged from the gas outlet of the lower part of the dissolving component, and the dissolved solution enters the lower part of the dissolving component through the filter element, and the solution is retained in sections to obtain solutions of different concentrations, thereby realizing the freezing concentration of the dilute solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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.

[0032] Figure 1 It is a structural schematic diagram of the freezing concentration device of the present invention.

[0033] In the figure, 1-dissolving component, 2-cover body, 3-gas inlet, 4-gas outlet, 5-orifice plate, 6-crushed solid, 7-filter element, 8-solution, 9-solution outlet, 10-bracket, 11-fan, 12-gas temperature regulating device, 13-gas drying device.

[0034] 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

[0035] 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.

[0036] Example 1

[0037] One embodiment of the present invention provides a freeze concentration device, comprising:

[0038] Dissolution component 1, gas processing component;

[0039] The dissolving component 1 is provided with a filter element 7, which divides the dissolving component 1 into two parts: the upper part of the dissolving component is used to load the crushed solid 6, which is obtained by crushing a solid or a solid-liquid mixture frozen from a dilute solution (the dilute solution is frozen into a solid in other equipment; crushed in other equipment), and the lower part of the dissolving component is used to load the dissolved solution 8;

[0040] The gas processing assembly includes a gas drying device 13, a gas temperature regulating device 12, and a fan 11 connected in sequence;

[0041] A gas inlet 3 is provided on the upper side wall or the top of the dissolving component, and the gas inlet 3 is connected to the outlet of the fan 11 . A gas outlet 4 is provided on the lower side wall of the dissolving component.

[0042] Furthermore, a pore plate 5 is also provided on the upper part of the dissolving component, and the pore plate 5 is provided at a position lower than the position of the gas inlet 3 and higher than the upper surface of the loaded crushed solid 6 .

[0043] Furthermore, the area of ​​the pore plate 5 is equal to or slightly smaller than the cross-sectional area of ​​the inner space of the dissolving component 1 .

[0044] Furthermore, a solution outlet 9 is provided at the bottom of the lower part of the dissolving component, and a valve is provided on the solution outlet 9 for realizing segmented solution retention.

[0045] Furthermore, the filter element 7 is a filter screen or a membrane.

[0046] Furthermore, the freezing concentration device also includes a bracket 10 disposed at the bottom of the dissolution component for supporting the device.

[0047] Furthermore, the drying gas is air or nitrogen.

[0048] Example 2

[0049] Another embodiment of the present invention provides a freeze concentration device, such as Figure 1As shown, the difference from Example 1 is that a cover body 2 may be further provided on the top of the dissolving component, and the gas inlet 3 and the air hole plate 5 are both provided on the cover body 2 .

[0050] Preferably, the gas outlet 4 is connected to a gas drying device 13 so that the dried gas can be recycled after treatment. The gas circulation can be, for example, Figure 1 As shown, the gas forms a gas circulation loop between the dissolving component 1, the gas drying device 13, the gas temperature regulating device 12, and the fan 11; the energy medium gas is continuously dried, the temperature is adjusted, and the crushed solid 6 is heated and dissolved in the circulation loop. The gas drying device 13 is a condensing device, and condensate (containing a small amount of beneficial substances) will be obtained in the gas drying device 13; the gas temperature regulating device 12 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.

[0051] Specific operation: When the present invention is in use, the energy medium gas (such as nitrogen, air, etc.) is processed in the gas drying equipment 13 to obtain dry energy medium gas, and the dry energy medium gas is heated to the required temperature in the gas temperature regulating equipment 12, and then sent into the dissolution component 1 from the gas inlet 3 through the fan 11. The dry energy medium gas penetrates the crushed solid 6 in the upper part of the dissolution component 1 (the crushed solid is obtained by freezing a dilute solution to obtain a solid or a solid-liquid mixture, crushing the frozen solid or solid-liquid mixture, or separating the solid-liquid mixture and then crushing the solid), and performs heat transfer, and then is discharged from the gas outlet 4 of the lower part of the dissolution component, and the dissolved solution 8 enters the lower part of the dissolution component through the filter element 7 and is discharged from the solution outlet 9, and the solution is retained in sections to obtain solutions of different concentrations.

[0052] The gas discharged from the gas outlet 4 forms a gas circulation loop among the dissolving component 1, the gas drying device 13, the gas temperature regulating device 12, and the fan 11; the energy medium gas is continuously dried, the temperature is adjusted, and the crushed solid is heated and dissolved in the circulation loop.

[0053] 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 is provided with a filter element, which divides the dissolving component into two parts: the upper part of the dissolving component is used to load the crushed solid, the crushed solid is obtained by crushing the solid or solid-liquid mixture frozen from the dilute solution, and the lower part of the dissolving component is used to load the dissolved solution; The gas processing component is connected to a gas inlet arranged on the upper side wall or the top of the dissolving component, and a gas outlet is arranged on the lower side wall of the dissolving component.

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 upper part of the dissolving component is also provided with an air hole plate, and the setting position of the air hole plate is lower than the position of the gas inlet and higher than the upper surface of the loaded crushed solid.

4. The freeze concentration device according to claim 3, characterized in that: The area of ​​the pore plate is equal to or slightly smaller than the cross-sectional area of ​​the internal space of the dissolving component.

5. The freeze concentration device according to claim 1, characterized in that: A solution outlet is arranged at the bottom of the lower part of the dissolving component; and the filtering element is a filtering net or a membrane.

6. The freeze concentration device according to claim 1, characterized in that: Dilute solutions are frozen into solids in other freezing equipment; solids frozen from dilute solutions are crushed in other equipment.

7. The freeze concentration device according to claim 1, characterized in that: A cover body is also arranged on the top of the dissolving component, and the gas inlet and the air hole plate are arranged on the cover body.

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

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

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