Ultra-pure ammonia purification device
By designing an ultrapure ammonia purification device and using the continuous process of dehydration tower one, light removal tower and dehydration tower two to concentrate and purify ammonia water, the problem of difficulty in preparing ultrapure ammonia with existing technology has been solved, and the production of high-purity ammonia has been achieved. , reducing costs.
Patent Information
- Application Number
- CN202420988542.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-05-08
AI Technical Summary
The prior art is difficult to prepare liquid ammonia into ultrapure ammonia and cannot meet the electronics standard, resulting in high production costs in the optoelectronics industry.
An ultrapure ammonia purification device is designed, including a pretreatment unit, an impurity removal unit and a reprocessing unit. Through the continuous process of the first dehydration tower, the light removal tower and the second dehydration tower, the ammonia water is concentrated and purified to reach 7N ultrapure ammonia. of purity.
It realizes the extraction of 7N ultra-pure ammonia from ammonia water, reduces production costs, meets the needs of electronic grade standards, and simplifies the operating process.
Smart Images
Figure CN222357975U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of high-purity ammonia preparation, and in particular to an ultra-pure ammonia purification device. Background Art
[0002] In the field of optoelectronics, ultrapure ammonia is a very important raw material. The purity of ultrapure ammonia directly determines the luminous performance of light-emitting diodes, and the price of ultrapure ammonia affects the economic benefits of the optoelectronic industry. The production of ultrapure ammonia requires the use of a large amount of industrial ammonia, resulting in a high preparation cost of ultrapure ammonia. The residual ammonia in the tail gas during the production of solar cells and LEDs needs to be treated separately. Recycling ammonia in tail gas to make ultrapure ammonia can help reduce the production cost of ultrapure ammonia, while responding to the country's call for energy conservation and environmental protection. At present, there is a process for distilling ammonia water into liquid ammonia, but the purity of the liquid ammonia produced can only reach the level of industrial ammonia, far from the electronic grade standard. How to prepare liquid ammonia into ultrapure ammonia has become one of the problems that the optoelectronic industry urgently needs to solve. Utility Model Content
[0003] In view of this, the present application proposes an ultra-pure ammonia purification device to solve the above problems.
[0004] According to one aspect of the present application, an ultrapure ammonia purification device is proposed, which is suitable for using ammonia water as a raw material, and includes: a pretreatment unit, an impurity removal unit and a retreatment unit; the pretreatment unit is connected to the impurity removal unit, and the impurity removal unit is connected to the retreatment unit; the pretreatment unit includes: a dehydration tower, a first reboiler and a first condenser, one end of the dehydration tower is connected to the first reboiler, and the other end of the dehydration tower is connected to the first condenser; the impurity removal unit includes: a light removal tower, a second reboiler and a second condenser; one end of the light removal tower is connected to the second reboiler, and the other end of the light removal tower is connected to the second condenser; the retreatment unit includes: a second dehydration tower, a third reboiler and a third condenser; one end of the second dehydration tower is connected to the third reboiler, and the other end of the second dehydration tower is connected to the third condenser; the first dehydration tower is connected to the light removal tower through the first condenser, and the light removal tower is connected to the second dehydration tower through the second reboiler.
[0005] In a possible implementation, the first end of the first reboiler is connected to the first dehydration tower, the second end of the first reboiler is connected to the first dehydration tower, and the third end of the first reboiler is connected to the first discharge pipe.
[0006] In a possible implementation, the first end of the second reboiler is connected to the light removal tower, the second end of the second reboiler is connected to the light removal tower, and the third end of the second reboiler is connected to the second dehydration tower.
[0007] In a possible implementation, the first end of the third reboiler is connected to the second dehydration tower, the second end of the third reboiler is connected to the second dehydration tower, and the third end of the third reboiler is connected to the second discharge pipe.
[0008] In a possible implementation, the first end of the first condenser is connected to the first dehydration tower, the second end of the first condenser is connected to the first dehydration tower, and the third end of the first condenser is connected to the light removal tower.
[0009] In a possible implementation, the first end of the second condenser is connected to the light-removal tower, the second end of the second condenser is connected to the light-removal tower, and the third end of the second condenser is connected to the third discharge pipe.
[0010] In a possible implementation, the first end of the third condenser is connected to the second dehydration tower, the second end of the third condenser is connected to the second dehydration tower, and the third end of the third condenser is connected to the finished product tank.
[0011] In a possible implementation, the top of the first dehydration tower is connected to the bottom of the light-removal tower via a first condenser, and the bottom of the light-removal tower is connected to the top of the second dehydration tower via a second reboiler.
[0012] In a possible implementation, the first condenser is arranged between the first dehydration tower and the light-removal tower, and the first reboiler is arranged between the first dehydration tower and the light-removal tower; the second condenser is arranged between the light-removal tower and the second dehydration tower, and the second reboiler is arranged between the light-removal tower and the second dehydration tower.
[0013] In a possible implementation, the pre-processing unit is disposed adjacent to the impurity removal unit, and the impurity removal unit is disposed adjacent to the re-processing unit.
[0014] Beneficial effects of this application:
[0015] The ultra-pure ammonia purification device proposed in this application uses ammonia water from waste gas as raw material. Compared with the traditional production of industrial ammonia as raw material, it reduces production costs and better meets the needs of enterprises. After injecting ammonia water into the first dehydration tower, it enters the light removal tower and the second dehydration tower in turn to obtain 7N ultra-pure ammonia. This purification method is simple and easy to operate. At the same time, ultra-pure ammonia suitable for electronic grade standards can be obtained, which better meets the needs of users. Specifically, the first dehydration tower concentrates the ammonia water with a concentration of 3%-8% to the ammonia purity of 75%-85% at the top of the tower, and then enters the light removal tower, and the water with an ammonia content of less than 50ppm is discharged from the bottom of the tower. The light removal tower removes light component impurities (O2, N2, H2, CO2, etc.) at the top of the tower, and the kettle liquid with an ammonia content of 70%-80% after removing the light component impurities enters the second dehydration tower. The condensate of the second dehydration tower through the third condenser is partially refluxed, and part is output to the finished product tank as a 7N ultra-pure ammonia product, and then enters the use end from the finished product tank.
[0016] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.
[0018] Figure 1 A schematic structural diagram of an ultrapure ammonia purification device according to an embodiment of the present application is shown. DETAILED DESCRIPTION
[0019] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.
[0020] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0022] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.
[0023] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.
[0024] like Figure 1 As shown, the ultrapure ammonia purification device is suitable for using ammonia water as a raw material, and includes: a pretreatment unit, an impurity removal unit and a retreatment unit; the pretreatment unit is connected to the impurity removal unit, and the impurity removal unit is connected to the retreatment unit; the pretreatment unit includes: a dehydration tower 110, a first reboiler 120 and a first condenser 130, one end of the dehydration tower 110 is connected to the first reboiler 120, and the other end of the dehydration tower 110 is connected to the first condenser 130; the impurity removal unit includes: a light removal tower 210, a second reboiler 220 and a second condenser 230; the dehydration tower 110 is connected to the first reboiler 120, and the other end of the dehydration tower 110 is connected to the first condenser 130; the impurity removal unit includes: a light removal tower 210, a second reboiler 220 and a second condenser 230; One end of the light tower 210 is connected to the second reboiler 220, and the other end of the light removal tower 210 is connected to the second condenser 230; the reprocessing unit includes: a second dehydration tower 310, a third reboiler 320 and a third condenser 330; one end of the second dehydration tower 310 is connected to the third reboiler 320, and the other end of the second dehydration tower 310 is connected to the third condenser 330; the first dehydration tower 110 is connected to the light removal tower 210 through the first condenser 130, and the light removal tower 210 is connected to the second dehydration tower 310 through the second reboiler 220.
[0025] The ultra-pure ammonia purification device proposed in this embodiment uses ammonia water from waste gas as raw material, which reduces production costs compared to the traditional production of industrial ammonia as raw material, and better meets the needs of enterprises. The recovered ammonia water is treated by the pretreatment unit to obtain ammonia gas with a higher concentration, and then input into the impurity removal unit to remove other gases to obtain ammonia gas with a higher purity, and then ultra-pure ammonia is obtained by one-step distillation through the reprocessing unit. This purification method is simple and easy to operate, and at the same time, ultra-pure ammonia suitable for electronic grade standards can be obtained, which better meets the needs of users. Specifically, the dehydration tower 110 concentrates the ammonia water with a concentration of 3%-8% to 75% ammonia purity at the top of the tower, and then enters the light removal tower 210, and discharges water with an ammonia content of less than 50ppm from the tower kettle. The light removal tower 210 removes light component impurities (O2, N2, H2, CO2, etc.) at the top of the tower, and the kettle liquid with an ammonia content of 70%-80% after removing the light component impurities enters the dehydration tower 310. Part of the condensate from the second dehydration tower 310 through the third condenser 330 is refluxed, and part is output to the finished product tank as a 7N ultra-pure ammonia product, and then enters the user end from the finished product tank.
[0026] In one specific embodiment, the first end of the first reboiler 120 is connected to the first dehydration tower 110, the second end of the first reboiler 120 is connected to the first dehydration tower 110, and the third end of the first reboiler 120 is connected to the first discharge pipe 140. In this embodiment, it should be noted that the third end of the first reboiler 120 is connected to the first discharge pipe 140, which is used to transport wastewater with an ammonia content of less than or equal to 50 ppm to the outside and discharge the wastewater.
[0027] In one specific embodiment, the first end of the second reboiler 220 is connected to the light removal tower 210, the second end of the second reboiler 220 is connected to the light removal tower 210, and the third end of the second reboiler 220 is connected to the second dehydration tower 310. In this embodiment, it should be noted that, since the light component impurity tail gas needs to be removed, the light component impurities are evaporated and discharged by heating through the second reboiler 220 to obtain ammonia water with a high concentration, and the ammonia content is 70%-80%, and then the ammonia water is transmitted to the second dehydration tower 310 for further purification.
[0028] In one specific embodiment, the first end of the third reboiler 320 is connected to the second dehydration tower 310, the second end of the third reboiler 320 is connected to the second dehydration tower 310, and the third end of the third reboiler 320 is connected to the second discharge pipe 340. In this embodiment, it should be noted that the third end of the third reboiler 320 is connected to the second discharge pipe 340, which is used to transport low-concentration ammonia water to the outside, and the concentration of ammonia water in the discharged waste liquid is generally about 20%. It should also be noted that ammonia water of this concentration will generally be recycled into the raw ammonia water storage tank, so that the user can re-inject it into the first dehydration tower 110 for purification or directly use the ammonia gas in the raw ammonia water storage tank for other processes.
[0029] In one specific embodiment, the first end of the first condenser 130 is connected to the first dehydration tower 110, the second end of the first condenser 130 is connected to the first dehydration tower 110, and the third end of the first condenser 130 is connected to the light removal tower 210. In this embodiment, it should be noted that, according to the basic principle of distillation, the material in the first dehydration tower 110 is repeatedly distilled until the ammonia content delivered by the condenser to the light removal tower 210 reaches 75%-85%, and the 3%-8% ammonia water initially input to the first dehydration tower 110 is initially purified to an ammonia content of 75%-85%, which better meets the initial purification requirements of the factory.
[0030] In one specific embodiment, the first end of the second condenser 230 is connected to the light-removing tower 210, the second end of the second condenser 230 is connected to the light-removing tower 210, and the third end of the second condenser 230 is connected to the third discharge pipe 240. In this embodiment, it should be noted that the light-removing tower 210 removes light component impurities, such as oxygen, nitrogen, hydrogen, carbon dioxide, etc., at the top of the tower, so that the kettle liquid containing 70%-80% ammonia after the light component impurities are removed enters the second dehydration tower 310.
[0031] In one specific embodiment, the first end of the third condenser 330 is connected to the second dehydration tower 310, the second end of the third condenser 330 is connected to the second dehydration tower 310, and the third end of the third condenser 330 is connected to the finished product tank 400. In this embodiment, it should be noted that the third condenser 330 is arranged at the top of the second dehydration tower 310, and part of the condensate is refluxed through the third condenser 330, so that part of the condensate obtained can be extracted as a 7N product, and the 7N ultra-pure ammonia is transported to the finished product tank, and then enters the use end of electronic preparation from the finished product tank, thereby reducing the production cost of the optoelectronic industry and improving the efficiency of the preparation-related equipment of the optoelectronic industry.
[0032] In one specific embodiment, the top of the first dehydration tower 110 is connected to the bottom of the light removal tower 210 through the first condenser 130, and the bottom of the light removal tower 210 is connected to the top of the second dehydration tower 310 through the second reboiler 220. In this embodiment, it should be noted that under the same atmospheric pressure, the boiling point of water is much higher than the boiling point of ammonia. Since the first condenser 130 liquefies the high-temperature ammonia-containing gas and enters the light removal tower 210, the gas inlet of the first dehydration tower 110 and the gas inlet of the second dehydration tower 310 are set at the top, wherein the gas inlet of the first dehydration tower 110 is connected to the light removal tower 210, and the gas inlet of the second dehydration tower 310 is connected to the finished product tank, which saves more energy consumption and reduces the cost of producing ultra-pure ammonia.
[0033] In one specific embodiment, the first condenser 130 is disposed between the first dehydration tower 110 and the lightness removal tower 210, and the first reboiler 120 is disposed between the first dehydration tower 110 and the lightness removal tower 210; the second condenser 230 is disposed between the lightness removal tower 210 and the second dehydration tower 310, and the second reboiler 220 is disposed between the lightness removal tower 210 and the second dehydration tower 310. This facilitates maintenance personnel to overhaul the first reboiler 110, the second reboiler 210, the first condenser 130, and the second condenser 230.
[0034] In one specific embodiment, the pretreatment unit is arranged adjacent to the impurity removal unit, and the impurity removal unit is arranged adjacent to the reprocessing unit. In this embodiment, it should be noted that the first dehydration tower 110 is arranged adjacent to the light removal tower 210; the light removal tower 210 is arranged adjacent to the second dehydration tower 310. It is convenient for operators to detect the ammonia content output by the first dehydration tower 110, the light removal tower 210 and the second dehydration tower 310 respectively, to ensure that the final output is 7N ultra-pure ammonia, and it is also convenient for maintenance personnel to inspect the various components in the pretreatment unit, the impurity removal unit and the reprocessing unit.
[0035] In summary, it should be noted that a liquid inlet 111 is provided at the top of the first dehydration tower 110, and the liquid inlet is used to inject 3%-8% ammonia water into the first dehydration tower 110; a first end of the first condenser 130 is connected to the top of the first dehydration tower 110, and a second end of the first condenser 130 is connected to the top of the first dehydration tower 110; a first end of the first reboiler 120 is connected to the bottom of the first dehydration tower 110, and a second end of the first reboiler 120 is connected to the bottom of the first dehydration tower 110; a first end of the second condenser 230 is connected to the top of the light removal tower 210. , the second end of the second condenser 230 is connected to the top of the light removal tower 210; the first end of the second reboiler 220 is connected to the bottom of the light removal tower 210, and the second end of the second reboiler 220 is connected to the bottom of the light removal tower 210; the first end of the third condenser 330 is connected to the top of the second dehydration tower 310, and the second end of the third condenser 330 is connected to the top of the second dehydration tower 310; the first end of the third reboiler 320 is connected to the bottom of the second dehydration tower 310, and the second end of the first reboiler 120 is connected to the bottom of the second dehydration tower 310.
[0036] It should be noted that although the ultra-pure ammonia purification device is introduced as an example in this application, those skilled in the art will understand that this application should not be limited thereto. In fact, users can flexibly set it according to personal preferences and / or actual application scenarios, as long as it is reasonable.
[0037] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1. An ultrapure ammonia purification device, suitable for using aqueous ammonia as raw material, characterized in that: include: Pre-treatment unit, impurity removal unit and re-treatment unit; The pre-processing unit is connected to the impurity removal unit, and the impurity removal unit is connected to the re-processing unit; The pretreatment unit comprises: a dehydration tower, a first reboiler and a first condenser, one end of the dehydration tower is connected to the first reboiler, and the other end of the dehydration tower is connected to the first condenser; The impurity removal unit comprises: a light removal tower, a second reboiler and a second condenser; one end of the light removal tower is connected to the second reboiler, and the other end of the light removal tower is connected to the second condenser; The reprocessing unit comprises: a second dehydration tower, a third reboiler and a third condenser; one end of the second dehydration tower is connected to the third reboiler, and the other end of the second dehydration tower is connected to the third condenser; The first dehydration tower is connected to the light-removal tower through the first condenser, and the light-removal tower is connected to the second dehydration tower through the second reboiler.
2. The ultrapure ammonia purification device according to claim 1, characterized in that: The first end of the first reboiler is connected to the first dehydration tower, the second end of the first reboiler is connected to the first dehydration tower, and the third end of the first reboiler is connected to the first discharge pipe.
3. The ultrapure ammonia purification device according to claim 1, characterized in that: The first end of the second reboiler is connected to the light removal tower, the second end of the second reboiler is connected to the light removal tower, and the third end of the second reboiler is connected to the second dehydration tower.
4. The ultrapure ammonia purification device according to claim 1, characterized in that: The first end of the third reboiler is connected to the second dehydration tower, the second end of the third reboiler is connected to the second dehydration tower, and the third end of the third reboiler is connected to the second discharge pipe.
5. The ultrapure ammonia purification device according to claim 1, characterized in that: The first end of the first condenser is connected to the first dehydration tower, the second end of the first condenser is connected to the first dehydration tower, and the third end of the first condenser is connected to the light removal tower.
6. The ultrapure ammonia purification device according to claim 1, characterized in that: The first end of the second condenser is connected to the light-removal tower, the second end of the second condenser is connected to the light-removal tower, and the third end of the second condenser is connected to the third discharge pipe.
7. The ultrapure ammonia purification device according to claim 1, characterized in that: The first end of the third condenser is connected to the second dehydration tower, the second end of the third condenser is connected to the second dehydration tower, and the third end of the third condenser is connected to the finished product tank.
8. The ultrapure ammonia purification device according to any one of claims 1 to 7, characterized in that: The top of the first dehydration tower is connected to the bottom of the light-removal tower through a first condenser, and the bottom of the light-removal tower is connected to the top of the second dehydration tower through a second reboiler.
9. The ultrapure ammonia purification device according to any one of claims 1 to 7, characterized in that: The first condenser is arranged between the first dehydration tower and the light-removing tower, and the first reboiler is arranged between the first dehydration tower and the light-removing tower; the second condenser is arranged between the light-removing tower and the second dehydration tower, and the second reboiler is arranged between the light-removing tower and the second dehydration tower.
10. The ultrapure ammonia purification device according to any one of claims 1 to 7, characterized in that: The pre-processing unit is disposed adjacent to the impurity removal unit, and the impurity removal unit is disposed adjacent to the re-processing unit.