Continuous sublimation device for purification
By using two sublimators and a cold trap design with one in use and one as a backup, continuous sublimation purification is achieved, solving the problem of synchronous operation in existing technologies, improving production efficiency and preventing blockage of the vacuum system.
Patent Information
- Application Number
- CN202422706595.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-07
AI Technical Summary
Existing sublimation purification processes cannot achieve simultaneous sublimation and deposition, making continuous operation impossible.
The design employs two sublimators, one in use and one on standby. Continuous operation of the sublimator is achieved by switching between refrigerant and heat transfer medium. A cold trap, one in use and one on standby, is also provided to capture uncondensed material and prevent blockage of the vacuum system.
It has achieved a continuous sublimation and purification process, solved the problem of vacuum system blockage, and improved production efficiency.
Smart Images
Figure CN223504866U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material separation and purification technology, and in particular to a continuous sublimation apparatus for purification. Background Technology
[0002] Sublimation purification is a method for separating and purifying substances. Its principle lies in utilizing the direct transformation of substances between solid and gaseous states. In the sublimation process, the substance to be purified is first heated above its sublimation temperature, causing it to transform into a gaseous state. Then, by cooling, the gaseous molecules re-condense into a solid, thus purifying the substance. During this process, impurities typically do not sublimate with the substance but remain in the solid, thereby achieving separation and purification.
[0003] In existing technologies, sublimation purification processes typically involve heating solid materials in a sublimator to induce sublimation, and then using a condenser to condense the gaseous material. Once condensation reaches a certain level, the vacuum outlet valve of the condenser is closed, and the heat exchanger switches to a heat medium to melt the condensate into a liquid, which is then discharged from the liquid phase outlet, thus achieving the purification of the solid material. However, in the above process, because only one condenser is used, the sublimated material must complete its liquid transformation before the next process cycle can begin, making it impossible to achieve simultaneous sublimation and condensation. Summary of the Invention
[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a continuous sublimation device for purification. This device is connected to two condensers, one in use and one on standby. While one condenser performs liquid-phase condensation and the condensate melts into liquid and is discharged into a storage tank from the liquid phase outlet, the other condenser cooperates with the sublimer to perform condensation operation, thereby achieving continuous sublimation. The technical solution adopted is as follows: A continuous sublimation device for purification, comprising a sublimer, a condenser, and a tail gas treatment section, characterized in that: the sublimer includes a material inlet and a material outlet; the material outlet of the sublimer is connected to the gas phase inlet of the condenser; the liquid phase outlet of the condenser is connected to the inlet of the storage tank; and the vacuum outlet of the condenser is connected to the tail gas treatment section; the tail gas treatment section includes a cold trap, the heat medium of which is steam or hot water, etc., used to melt the material condensed in the cold trap; the cooling medium of the cold trap is low-temperature water or other cooling medium, used to capture uncondensed material contained in the tail gas of the condenser; the condenser includes condenser I and condenser II. Solid material enters the device through the material inlet of the sublimator. Under the action of the heat exchanger built into the sublimator, the solid material is heated and sublimated into a gaseous state, which enters the gas phase inlet of one of the condensers through the material outlet. Cooling medium is introduced into the heat exchanger of the condenser, causing the gaseous material to condense. After the material on the surface of the heat exchanger condenses to a certain extent, the vacuum outlet valve of the condenser is closed, and the heat exchanger switches to the heat medium to melt the condensate into a liquid, which is discharged into the storage tank through the liquid phase outlet, thereby purifying the material. At the same time, the process switches to another condenser for condensation operation.
[0005] The cold traps include Cold Trap I and Cold Trap II, which are used alternately in a one-in-one standby configuration. Materials escaping from the sublimation purification process are cooled in the cold traps and then transported to the exhaust gas outlet by a vacuum pump. To prevent blockage of the vacuum pump, the heat exchangers in the cold traps can switch between refrigerant and heat transfer media. In operation, refrigerant is used to condense all condensable substances in the vacuum gas discharged from the sublimator. Then, the system periodically switches to regeneration mode, where heat transfer media is introduced to melt the condensate from the heat exchanger surface and discharge it, restoring the heat exchanger's heat exchange capacity.
[0006] The sublimator includes a sublimator heat medium inlet and a sublimator heat medium outlet, and also includes a residue outlet. The heat exchanger of the sublimator transfers the heat energy in the heat medium to the material, thereby causing easily sublimable materials to switch from a solid state to a gaseous state.
[0007] The beneficial effects of this utility model are as follows: This device solves the technical problem that continuous sublimation and purification cannot be achieved in the prior art by using two sublimators, one for use and one for backup; This device uses a cold trap, one for use and one for backup, with the heat medium of the cold trap being steam or hot water, to melt the material condensed in the cold trap, so as to capture the uncondensed material contained in the exhaust gas of the sublimator, thereby solving the problem of vacuum system blockage caused by easily sublimable substances. Attached Figure Description
[0008] AppendixFigure 1 This is a schematic diagram of the structure of this utility model, wherein 1 is a sublimator, 2 is a condenser I, 3 is a condenser II, 4 is a storage tank, 5 is a cold trap I, 6 is a cold trap II, and 7 is a vacuum pump. Detailed Implementation
[0009] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.
[0010] This utility model discloses a continuous sublimation device for purification, which includes a sublimator 1, a condenser, and a tail gas treatment section. The sublimator 1 includes a material inlet and a material outlet. The material outlet of the sublimator 1 is connected to the gas phase inlet of the condenser, and the liquid phase outlet of the condenser is connected to the inlet of a storage tank 4. The vacuum outlet of the condenser 2 is connected to the tail gas treatment section. The condenser includes condenser I 2 and condenser II 3. The tail gas treatment section includes a cold trap. The heat medium of the cold trap is steam or hot water, used to melt the material condensed in the cold trap. The cooling medium of the cold trap is low-temperature water or other cooling medium, used to capture uncondensed material contained in the tail gas of the condenser. The cold trap includes cold trap I 5 and cold trap II 6.
[0011] Sublimator 1 includes a sublimator heat medium inlet and a sublimator heat medium outlet, and also includes a residue outlet. The cold trap includes a refrigerant inlet and a refrigerant outlet.
[0012] The heat exchangers involved in this device can use steam heat exchange or heat transfer oil or hot water for insulation and heat tracing to prevent material condensation.
[0013] Of course, the above description is not a limitation of this utility model, and this utility model is not limited to the examples mentioned above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model are also within the protection scope of this utility model.
Claims
1. A continuous sublimation apparatus for purification, comprising a sublimator, a condenser, and a tail gas treatment section, characterized in that: The sublimator includes a material inlet and a material outlet. The material outlet of the sublimator is connected to the gas phase inlet of the condenser, the liquid phase outlet of the condenser is connected to the inlet of the storage tank, and the vacuum outlet of the condenser is connected to the tail gas treatment section. The tail gas treatment section includes a cold trap. The condenser includes condenser I and condenser II.
2. The continuous sublimation apparatus for purification according to claim 1, characterized in that: The cold trap includes cold trap I and cold trap II.
3. The continuous sublimation apparatus for purification according to claim 2, characterized in that: The sublimator includes a sublimator heat medium inlet and a sublimator heat medium outlet, and the sublimator also includes a residue outlet.
4. The continuous sublimation apparatus for purification according to claim 2, characterized in that: The cold trap also includes a refrigerant inlet and a refrigerant outlet.