Flash sublimation device for evaporation purification

Abstract

The flash evaporation sublimation device comprises a melting kettle, the right side of the top of the melting kettle is connected with a quantitative feeder, the bottom of the melting kettle is connected with a residue storage tank, the center of the top of the melting kettle is connected with an evaporator, the top of the evaporator is provided with a sublimation gas outlet, and the sublimation gas outlet is connected with a gas inlet. The sublimation gas outlet is communicated with a desublimation device through a pipeline, the lower end of the desublimation device is provided with a pure product bin, the outer wall of the pure product bin is connected with a cyclone separator, the top of the cyclone separator is connected with a bag-type dust collector, and the top of the bag-type dust collector is provided with a vacuum system; the device is reasonable in structural design, the sublimation period is greatly shortened, the heating temperature is low, and the device is suitable for large-scale continuous operation.

Description

Technical Field

[0001] The invention relates to the technical field of sublimation equipment, in particular to a flash sublimation device for evaporation and purification. Background Art

[0002] Sublimation, from a microscopic point of view, is the process in which molecules on the surface of a liquid (crystal) break free from the attraction of other molecules and run outside the liquid (crystal) to become vapor molecules. The sublimation process is, in a sense, an evaporation process. Evaporation is a very common natural phenomenon, and it is also a slow and gentle gasification phenomenon that occurs on the surface of a liquid at any temperature.

[0003] The function of stirring is to scoop up the liquid and vaporize it. The purpose of atomization is also to vaporize the liquid. The purpose of both is to turn liquid molecules into gas molecules, but the difference between the two is: the liquid molecules raised during stirring are large and have a small chance of turning into gas molecules; while the liquid molecules during spraying are small and have a high chance of turning into gas molecules.

[0004] Spraying is artificial fogging, which uses a high-pressure system to spray liquid in the form of extremely fine water particles, droplets, liquid filaments, and liquid films to reduce the evaporation boiling point. These tiny artificial fog particles have a large specific surface area and can be suspended in the air for a long time, turning into saturated steam under partial pressure and being pulled into the vacuum airflow to condense and form refined crystals.

[0005] The traditional sublimation process uses temperature and stirring. At a suitable temperature point, the saturated liquid is thrown up to form a gas-liquid interface, and the saturated liquid is atomized into gas. Since the stirring speed cannot reach the effect of centrifugal force, the gasification efficiency is very poor. Therefore, the sublimation process is relatively long, and there is a risk of coking and decomposition if heated for a long time, and the yield is very poor. For this reason, we propose a flash sublimation device for evaporation purification. Summary of the invention

[0006] The object of the present invention is to provide a flash sublimation device for evaporation purification to overcome the technical problems existing in the prior art.

[0007] In order to achieve the above technical objectives and the above technical effects, the present invention provides the following technical solutions:

[0008] A flash sublimation device for evaporation and purification comprises a melting kettle, a quantitative feeder is connected to the right side of the top of the melting kettle, a residue storage tank is connected to the bottom of the melting kettle, an evaporator is connected to the center of the top of the melting kettle, a sublimation gas outlet is provided on the top of the evaporator, the sublimation gas outlet is connected to a condenser through a pipeline, a pure product bin is installed at the lower end of the condenser, a cyclone separator is connected to the outer wall of the pure product bin, a bag dust collector is connected to the top of the cyclone separator, and a vacuum system is installed on the top of the bag dust collector.

[0009] Preferably, in a flash sublimation device for evaporation purification, an inert gas inlet is provided on the outer wall of the evaporator, an atomizer is built into the evaporator, and a hot liquid circulation pump is connected between the atomizer and the melting kettle through a pipeline.

[0010] Preferably, in a flash sublimation device for evaporation purification, the melting kettle and the evaporator are both equipped with heating jackets, and the heating jackets are of a semicircular coil structure.

[0011] Preferably, in a flash sublimation device for evaporation purification, the residue storage tank is equipped with a material level sensor, valves are installed at the upper and lower ends of the residue storage tank, and the material level sensor is electrically connected to the valve.

[0012] Preferably, in a flash sublimation device for evaporation purification, a heat-insulating jacket is installed at the end of the hot liquid circulation pump.

[0013] Preferably, in a flash sublimation device for evaporation purification, the atomizer is a non-clogging spiral atomizer.

[0014] Preferably, in a flash sublimation device for evaporation purification, the condenser is provided with a cooling jacket outside and a spiral ribbon wall scraping pusher inside.

[0015] Preferably, a flash sublimation device for evaporation purification also includes a control system, which is electrically connected to the melting kettle, the residue storage tank, the evaporator, the hot liquid circulation pump, the condenser, the cyclone separator, the bag dust collector and the vacuum system.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The structure of the present invention is reasonably designed. The device allows the saturated liquid in the molten kettle that reaches the sublimation point temperature to enter the atomizer designed in the evaporator through a hot liquid circulation pump, and becomes part of the saturated steam and saturated liquid. The saturated steam is the sublimation gas, which can be brought into the condenser by the vacuum airflow to form crystals. The device greatly shortens the sublimation cycle and has a low heating temperature, so it is suitable for large-scale continuous operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] In the figure: 1. quantitative feeder; 2. melting kettle; 3. residue storage tank; 4. inert gas inlet; 5. evaporator; 6. hot liquid circulation pump; 7. atomizer; 8. sublimation gas outlet; 9. condenser; 10. pure product silo; 11. cyclone separator; 12. bag filter; 13. vacuum system; 14. control system. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0022] See also Figure 1 As shown, this embodiment is a flash sublimation device for evaporation purification, comprising a melting kettle 2, a quantitative feeder 1 is connected to the right side of the top of the melting kettle 2, a residue storage tank 3 is connected to the bottom of the melting kettle 2, an evaporator 5 is connected to the center of the top of the melting kettle 2, a sublimation gas outlet 8 is provided on the top of the evaporator 5, and the sublimation gas outlet 8 is connected to a condenser 9 through a pipeline, a pure product silo 10 is installed at the lower end of the condenser 9, a cyclone separator 11 is connected to the outer wall of the pure product silo 10, a bag dust collector 12 is connected to the top of the cyclone separator 11, and a vacuum system 13 is installed on the top of the bag dust collector 12.

[0023] An inert gas inlet 4 is provided on the outer wall of the evaporator 5, and an atomizer 7 is built in the evaporator 5. A hot liquid circulation pump 6 is connected between the atomizer 7 and the melting kettle 2 through a pipeline to facilitate the transportation of saturated liquid reaching the sublimation point temperature.

[0024] The melting kettle 2 and the evaporator 5 are both equipped with heating jackets, which are semicircular coil structures and are non-pressure vessels. Depending on the specific situation, the melting kettle 2 can be horizontal or vertical.

[0025] The residue storage tank 3 is equipped with a material level sensor, and valves are installed at the upper and lower ends of the residue storage tank 3. The material level sensor is electrically connected to the valve. The material level is controlled by the material level sensor, and the upper and lower valves are intelligently interlocked to realize automatic slag discharge.

[0026] The end of the hot liquid circulation pump 6 is provided with a heat-insulating jacket, which has a good protection effect.

[0027] The atomizer 7 specifically adopts a non-clogging spiral atomizer, which can smoothly atomize and deliver the liquid.

[0028] The desublimator 9 is provided with a cooling jacket outside and a screw-belt wall scraper pusher inside, and can be horizontal or vertical according to specific circumstances.

[0029] It also includes a control system 14, which is electrically connected to the melting kettle 2, the residue storage tank 3, the evaporator 5, the hot liquid circulation pump 6, the condenser 9, the cyclone separator 11, the bag filter 12 and the vacuum system 13 to facilitate the operation of the control components.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A flash sublimation device for evaporation purification, comprising a melting kettle (2), characterized in that: The right side of the top of the melting kettle (2) is connected to a quantitative feeder (1), the bottom of the melting kettle (2) is connected to a residue storage tank (3), the center of the top of the melting kettle (2) is connected to an evaporator (5), the top of the evaporator (5) is provided with a sublimation gas outlet (8), the sublimation gas outlet (8) is connected to a condenser (9) through a pipeline, the lower end of the condenser (9) is equipped with a pure product bin (10), the outer wall of the pure product bin (10) is connected to a cyclone separator (11), the top of the cyclone separator (11) is connected to a bag dust collector (12), and the top of the bag dust collector (12) is equipped with a vacuum system (13).

2. A flash sublimation device for evaporation purification according to claim 1, characterized in that: An inert gas inlet (4) is provided on the outer wall of the evaporator (5), an atomizer (7) is built into the evaporator (5), and a hot liquid circulation pump (6) is connected between the atomizer (7) and the melting kettle (2) through a pipeline.

3. A flash sublimation device for evaporation purification according to claim 1, characterized in that: The melting kettle (2) and the evaporator (5) are both equipped with a heating jacket, and the heating jacket adopts a semicircular coil structure.

4. A flash sublimation device for evaporation purification according to claim 1, characterized in that: The residue storage tank (3) is provided with a material level sensor, and valves are installed at the upper and lower ends of the residue storage tank (3), and the material level sensor is electrically connected to the valve.

5. A flash sublimation device for evaporation purification according to claim 2, characterized in that: A heat-insulating jacket is installed at the end of the hot liquid circulation pump (6).

6. A flash sublimation device for evaporation purification according to claim 2, characterized in that: The atomizer (7) is specifically a non-clogging spiral atomizer.

7. A flash sublimation device for evaporation purification according to claim 1, characterized in that: The desublimator (9) is provided with a cooling jacket outside and a screw-belt type wall scraping pusher inside.

8. A flash sublimation device for evaporation purification according to claim 2, characterized in that: It also includes a control system (14), wherein the control system (14) is electrically connected to the melting kettle (2), the residue storage tank (3), the evaporator (5), the hot liquid circulation pump (6), the desublimator (9), the cyclone separator (11), the bag filter (12) and the vacuum system (13).

Images