Freeze concentration device

Abstract

The invention belongs to the technical field of freeze concentration, and particularly relates to a freeze concentration device which comprises a freeze dissolution assembly and a negative pressure air extractor. The freezing and dissolving assembly comprises a container, a container upper cover, a container bottom cover, and an air guide hole and a negative pressure guide pipe channel which are arranged on the container upper cover; the negative-pressure air extractor comprises a negative-pressure guide pipe port, a negative-pressure guide pipe, a gas-liquid separation device and a negative-pressure air extractor; after the dilute solution is frozen into a solid-state or solid-liquid mixed-state frozen material in the freezing and dissolving assembly, the negative-pressure air extractor is started, and gas serves as an energy medium to enter the container to transfer heat to the frozen material for dissolving; dissolving solutions are retained in a segmented manner, solutions meeting the target concentration are retained for standby application, and solutions not meeting the target concentration are continuously frozen and dissolved by using the freezing concentration device, so that dilute solution concentration is realized.

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] The existing freeze concentration technology method is: using the solid-liquid phase relationship between a dilute solution and ice below the freezing point to achieve concentration through solid-liquid separation; this method mainly has two methods: suspension crystallization freeze concentration method and (interface) progressive freeze concentration method. In addition, there is a freeze concentration method that uses the natural dissolution of ice or heating to dissolve the ice (belonging to the traditional conventional heating and dissolving freeze concentration method). However, these three types of existing freeze concentration methods all have the problem of low concentration efficiency.

[0003] Suspended crystallization freeze concentration and progressive freeze concentration are methods of achieving concentration by separating solid and liquid (ice crystals and liquid). Both methods have the problem of ice crystals entraining solutes and low concentration efficiency. Although the traditional conventional heating and dissolving (including natural dissolution) concentration method for frozen materials does not have the efficiency problem caused by solute entrainment, it has to face a problem that technicians have been unable to solve for a long time and seriously affects the concentration efficiency: when the frozen materials are heated in the traditional conventional way, if the heating is too fast, the concentration effect will deteriorate. If low-temperature heating (such as refrigeration temperature) is used, the concentration effect will be better than that at high temperature (relative to the temperature), but it takes a very long time. For this reason, when technicians use the traditional conventional heating and dissolving freeze concentration method, they generally prefer natural dissolution at room temperature (heating and dissolving using environmental energy) or heating and dissolving at refrigeration temperature; the traditional conventional heating and dissolving (including natural dissolution at room temperature) freeze concentration is not only time-consuming, but also has a lower concentration efficiency than the first two methods (methods of achieving concentration through solid-liquid separation). Therefore, most of the current mainstream freeze concentration technology methods use the first two methods (methods of achieving concentration through solid-liquid separation).

[0004] The freeze concentration device described in the prior art includes a dissolution component and a gas treatment component; a filter element is provided 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 treatment component includes a gas drying device, a gas temperature regulating device, and a fan connected in sequence; a gas inlet is provided on the side wall or top of the upper part of the dissolution component, and the gas inlet is connected to the fan outlet, and a gas outlet is provided 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. 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. The above device improves the effect and efficiency of dissolution and separation by crushing the frozen material (solid or solid-liquid mixture) and allowing the gas of the energy medium to penetrate the crushed frozen material, thereby improving the effect and efficiency of freeze concentration. However, in the freeze concentration process, the device needs to perform an independent crushing process on the frozen material before dissolving and separating it, which increases the difficulty of operation. When concentrating a high-concentration solution, it is often necessary to operate at a deep low temperature. Moreover, the increase in operating links will also lead to more complex difficulties in the design of multi-stage freeze concentration combinations or automated control of freeze concentration devices. Summary of the invention

[0005] 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.

[0006] According to one aspect of the present invention, the present invention provides the following technical solution: A freezing concentration device, comprising: a freezing and thawing component, a negative pressure exhaust device; The freezing and thawing assembly includes a container, a container cover, and an air guide hole and a negative pressure conduit channel arranged on the container cover; The negative pressure exhaust device comprises a negative pressure catheter port, a negative pressure catheter, a gas-liquid separation device, and a negative pressure exhaust machine which are connected in sequence; When the dilute solution is frozen into a solid or solid-liquid mixed frozen material in the freeze-thaw component, the negative pressure exhaust device is started, and the gas enters the container through the air guide hole, and transfers heat to the frozen material as an energy medium to dissolve it; the solution is retained in sections, and the solution that meets the target concentration is retained for use, and the solution that does not meet the target concentration is continued to be frozen and dissolved using the freeze concentration device to achieve concentration of the dilute solution.

[0007] As a preferred embodiment of the freezing concentration device described in the present invention, after the dilute solution is completely frozen, a negative pressure conduit is set in the frozen material in the container by destroying the frozen material, the negative pressure conduit port is located at the bottom of the freeze-thaw component container, and the internal structural characteristics of the frozen material are utilized to allow the gas to penetrate the frozen material to transfer heat thereto.

[0008] As a preferred embodiment of a freezing concentration device described in the present invention, the negative pressure catheter of the negative pressure exhaust device is pre-installed in the freezing and thawing component before the dilute solution is frozen, and the negative pressure catheter port is located at the bottom of the freezing and thawing component container; the negative pressure catheter port is provided with an outlet valve; a thawing heating device is provided on the negative pressure catheter port to thaw the negative pressure catheter port and the outlet valve, and utilizes the internal structural characteristics of the frozen material to allow the gas to penetrate the frozen material to transfer heat thereto.

[0009] As a preferred embodiment of the freezing concentration device described in the present invention, the negative pressure catheter is connected via a catheter connector.

[0010] As a preferred embodiment of the freezing concentration device described in the present invention, a container bottom cover is also provided at the bottom of the container.

[0011] As a preferred embodiment of the freezing concentration device described in the present invention, the gas used as the energy medium is a gas that does not interfere with the dissolution and separation of the frozen material, such as air, inert gas, carbon dioxide gas, nitrogen gas, etc.

[0012] As a preferred embodiment of the freezing concentration device described in the present invention, the energy carried by the energy medium gas is used to transfer heat to the freezing material, and the energy medium gas is replenished with energy for recycling; or the air energy carried by the air itself is used to transfer heat to the freezing material; before the energy medium gas transfers heat to the freezing material, it can be dried as needed.

[0013] 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, metal processing, environmental protection processing, etc.

[0014] The above-mentioned freezing and concentrating device is used in the fields of milk, vinegar (including vinegar-containing food, vinegar beverages, condiments, etc.), wine, beverages (such as juice, coffee, tea, soy milk, soy milk, etc.), chemical liquid, Chinese herbal medicine liquid, plant extract, petroleum purification, chemical purification, metal separation and purification, seawater purification, wastewater treatment, etc.

[0015] An application of the above-mentioned freezing concentration device in the field of freezing concentration and separation and purification of heat-sensitive raw materials.

[0016] The above-mentioned freezing concentration device is used in the fields of freezing concentration and separation and purification of milk, vinegar (including vinegar-containing food, vinegar beverages, condiments, etc.), wine, beverages (such as juice, coffee, tea, soy milk, soy milk, etc.), chemical liquid, Chinese herbal medicine liquid, plant extract, petroleum purification, chemical purification, metal separation and purification, seawater purification, wastewater treatment, etc.

[0017] The beneficial effects of the present invention are as follows: The present invention proposes a freezing concentration device, comprising a freezing and thawing component and a negative pressure exhaust device; the freezing and thawing component comprises a container, a container upper cover, a container bottom cover, and an air guide hole and a negative pressure conduit channel arranged on the container upper cover; the negative pressure exhaust device comprises a negative pressure conduit port, a negative pressure conduit, a gas-liquid separation device, and a negative pressure exhaust fan; when a dilute solution is frozen into a solid or solid-liquid mixed state of frozen material in the freezing and thawing component, the negative pressure exhaust device is started, and gas enters the container as an energy medium to transfer heat to the frozen material for dissolution; the solution is retained in stages, 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 and thawing device to achieve concentration of the dilute solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 It is a schematic structural diagram of the freeze concentration device of the present invention.

[0020] In the figure, 1-container, 2-air guide hole, 3-container upper cover, 4-container bottom cover, 5-negative pressure catheter channel, 6-frozen material, 7-negative pressure catheter port, 8, 10, 14-negative pressure catheter, 9-catheter connector, 11-gas-liquid separation device, 12-concentrated solution, 13-concentrated solution outlet valve, 15-negative pressure vacuum pump, 16-negative pressure vacuum pump outlet, 17-gas.

[0021] 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

[0022] 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.

[0023] like Figure 1 As shown, the present invention provides a freezing concentration device, including: a freezing and thawing component, a negative pressure exhaust device; The freezing and thawing assembly comprises a container 1, a container upper cover 3, a container bottom cover 4, and an air guide hole 2 and a negative pressure conduit channel 5 arranged on the container upper cover 3; The negative pressure exhaust device includes a negative pressure conduit port 7, negative pressure conduits 8, 10, 14, a gas-liquid separation device 11, and a negative pressure exhaust machine 15 connected in sequence; After the dilute solution is frozen into a solid or solid-liquid mixed frozen material 6 in the freeze-thaw assembly, the surface structure of the frozen material 6 is destroyed, and the negative pressure catheter port 7 is set in the frozen material 6 of the container 1. The negative pressure exhaust device is started, and the pressure difference between the inside and outside of the container 1 causes the gas 17 (such as the air in the working environment) to enter the container 1 through the air guide hole 2 and penetrate the frozen material 6; the solution is retained in sections, and the solution that meets the target concentration is retained for use, and the solution that does not meet the target concentration is continued to be frozen and dissolved using the freeze concentration device to achieve concentration of the dilute solution.

[0024] In one embodiment of the present invention, the dense solid layer on the surface of the frozen material 6 in the direction of gas 17 entering and exiting is mechanically destroyed, the negative pressure catheter port 7 is set in the frozen material 6 in the container 1, and the internal structural characteristics of the frozen material 6 are utilized to allow the gas 17 to pass through the frozen material 6 to transfer heat thereto.

[0025] In one embodiment of the present invention, the solid structure of the frozen material 6 in the container 1 is directly destroyed by mechanical means, the negative pressure catheter port 7 is set in the frozen material 6 in the container 1, and the internal structural characteristics of the frozen material 6 are utilized to allow the gas 17 to pass through the frozen material 6 to transfer heat thereto.

[0026] In one embodiment of the present invention, the negative pressure tubes 8 , 10 , 14 are connected via a tube connector 9 .

[0027] In one embodiment of the present invention, the gas 17 used as the energy medium is a gas that does not interfere with the dissolution and separation of the frozen material, such as air, inert gas, carbon dioxide gas, nitrogen gas, etc.

[0028] In one embodiment of the present invention, the energy carried by the gas 17 as an energy medium is used to transfer heat to the frozen material 6, and the energy of the gas 17 as an energy medium is replenished and recycled; or the air energy carried by the air itself is used to transfer heat to the frozen material 6; before the gas 17 as an energy medium transfers heat to the frozen material 6, it can be dried as needed.

[0029] When the freezing concentration device of the present invention is in use, the container cover 3 of the freezing and dissolving component container 1 is opened, the dilute solution is injected into the container 1, the container cover 3 is closed, and the freezing and dissolving component is sent into the freezing equipment. When the dilute solution is frozen into a solid or solid-liquid mixed frozen material 6 in the freezing and dissolving component, the freezing and dissolving component is removed from the freezing equipment; the container cover 3 is opened, and the surface structure of the frozen material 6 is mechanically destroyed. Then, the negative pressure conduit port 7 is set in the frozen material 6 of the container, and the negative pressure exhaust device is started. The pressure difference between the inside and outside of the container 1 causes the gas 17 (for example, the air in the working environment) to enter the container 1 through the air guide hole 2 and penetrate the frozen material 6. After the surface structure of the frozen material 6 is destroyed, the negative pressure conduit port 7 is set in the frozen material 6 of the container, and the negative pressure exhaust device is started. After the surface of the damaged frozen material 6 is penetrated, the internal structural characteristics of the frozen material 6 are utilized to penetrate the frozen material 6; at the same time, the gas-liquid mixture passes through the negative pressure catheter port 7, the negative pressure catheter 8, the catheter connector 9, and the negative pressure catheter 10 in sequence into the gas-liquid separator device 11; the concentrated solution 12 remains below the gas-liquid separation device 11, and the gas passes through the negative pressure catheter 14 and then passes through the negative pressure vacuum pump 15 and is discharged through the negative pressure vacuum pump outlet 16; solutions of different concentrations are retained in sections through the concentrated solution outlet valve 13 of the gas-liquid separator device 11; the solution that meets the target concentration is retained for use, and the solution that does not meet the target concentration is continuously frozen and dissolved using the freezing concentration device to achieve concentration of the dilute solution.

[0030] 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: Freeze-thaw components, negative pressure exhaust device; The freezing and thawing assembly comprises a container, a container upper cover, a container bottom cover, and an air guide hole and a negative pressure conduit channel arranged on the container upper cover; The negative pressure exhaust device comprises a negative pressure catheter port, a negative pressure catheter, a gas-liquid separation device, and a negative pressure exhaust machine which are connected in sequence; When the dilute solution is frozen into a solid or solid-liquid mixed frozen material in the freeze-thaw component, the negative pressure exhaust device is started, and the gas enters the container to transfer heat to the frozen material for dissolution; the dissolved solution is retained in sections, and the solution that meets the target concentration is retained for use, and the solution that does not meet the target concentration is continued to be frozen and dissolved using the freeze concentration device to achieve concentration of the dilute solution.

2. The freeze concentration device according to claim 1, characterized in that: After the dilute solution has been completely frozen, a negative pressure conduit is placed in the frozen material in the container by disrupting the frozen material.

3. The freeze concentration device according to claim 1, characterized in that: The negative pressure catheter is pre-installed in the cryo-thawing assembly before the dilute solution is frozen.

4. The freeze concentration device according to claim 1, characterized in that: The negative pressure catheter is connected via a catheter connector.

5. The freeze concentration device according to claim 1, characterized in that: The gas used as the energy medium is a gas that does not interfere with the dissolution and separation of the cryogenic material.

6. The freeze concentration device according to claim 1, characterized in that: The energy carried by the energy medium gas is used to transfer heat to the freezing material, and the energy medium gas is replenished and recycled; or the air energy carried by the air itself is used to transfer heat to the freezing material.

7. Application of the freezing concentration device according to any one of claims 1 to 6 in the fields of food, cosmetics, biomedicine, petrochemicals, metal processing, and environmental protection processing.

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