Ammonia regeneration system taking ammonia water as raw material
By adopting an ammonia regeneration system with ammonia as raw material in the optoelectronic industry, the ammonia in wastewater is processed, and the problem of high ammonia treatment cost in traditional technology is solved, and efficient and environmentally friendly ultra-pure ammonia production is achieved, which reduces production cost and meet the requirements of electronic grade standards.
Patent Information
- Application Number
- CN202420988553.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-08
AI Technical Summary
In the prior art, the cost of treating ammonia with higher content in wastewater is higher, and the cost of producing ultrapure ammonia with traditional industrial ammonia as the raw material is higher, which affects the economic benefits of the optoelectronic industry.
An ammonia regeneration system using ammonia water as raw material is used to treat ammonia water through pretreatment unit, reprocessing unit and impurity removal unit to obtain high concentration of ammonia and high purity liquid ammonia. The system includes a first dehydration tower, a first reboiler, a second dehydration tower, a first condenser, a delight tower, a second reboiler and a second condenser, and is processed by circulating a plurality of towers and condensers, Achieve concentration of ammonia and removal of impurities.
It reduces the production cost of ultra-pure ammonia and meets the environmental protection needs of enterprises. The ultra-pure ammonia obtained meets the electronic-grade standards to meet user needs, while achieving efficient reuse of ammonia.
Smart Images
Figure CN222517745U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of wastewater treatment, and in particular to an ammonia regeneration system using aqueous ammonia as a raw material. 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 cost for the preparation of ultrapure ammonia. The residual ammonia in the tail gas during the production of solar cells and LEDs needs to be treated separately. At present, wastewater contains a large amount of ammonia, and the treatment of these ammonia-containing wastewaters requires a high treatment cost. Utility Model Content
[0003] In view of this, the present application proposes an ammonia regeneration system using aqueous ammonia as raw material to reuse wastewater.
[0004] According to one aspect of the present application, an ammonia regeneration system using ammonia water as a raw material is provided, comprising: a pretreatment unit, the pretreatment unit comprising: a first dehydration tower and a first reboiler, the first dehydration tower is suitable for connecting to an ammonia water discharge device, and the bottom of the first dehydration tower is connected to the first reboiler to discharge low-content wastewater, and the top is connected to the second dehydration tower to discharge concentrated ammonia;
[0005] The reprocessing unit comprises: a second dehydration tower and a first condenser, the bottom of the second dehydration tower is connected to the top of the first dehydration tower, and the condensed ammonia water is discharged into the second dehydration tower, and the top is connected to the light removal tower through the first condenser, and the heavy ammonia gas is discharged into the second dehydration tower;
[0006] The impurity removal unit, the pretreatment unit includes: a light removal tower, a second reboiler and a second condenser, the top of the light removal tower is connected to the second condenser to discharge non-condensable gas, and the bottom is connected to the second reboiler to obtain high-purity liquid ammonia.
[0007] In one possible implementation, the first dehydration tower is connected to the second dehydration tower in a loop.
[0008] In one possible implementation, the first condenser is communicated with the bottom of the second dehydration tower.
[0009] In a possible implementation, the input end of the first condenser is connected to the top of the second dehydration tower;
[0010] The first output end of the first condenser is communicated with the lightness removal tower;
[0011] The second output end of the first condenser is communicated with the interior of the second dehydration tower.
[0012] In a possible implementation, the input end of the second condenser is communicated with the top of the light removal tower;
[0013] The first output end of the second condenser discharges non-condensable gas;
[0014] The second output end of the second condenser is communicated with the interior of the light removal tower.
[0015] In one possible implementation, the invention further comprises: a finished product tank;
[0016] The bottom of the light removal tower is connected to the finished product tank through the second reboiler.
[0017] The beneficial effects of the ammonia regeneration system using ammonia water as raw material in the embodiment of the present application are as follows: using ammonia water produced by waste gas treatment as raw material reduces production costs compared to the traditional production of industrial ammonia as raw material, and better meets the environmental protection needs of enterprises. The recovered ammonia water is treated by the pretreatment unit to obtain ammonia gas with a higher concentration, which is distilled in a reprocessing unit in one step, and finally input into the impurity removal unit to remove other gas impurities to obtain liquid ammonia with higher purity. This purification method is simple and easy to operate, and can obtain ultra-pure ammonia that meets electronic grade standards, which better meets user needs. Specifically, 3%-8% ammonia water is injected into the interior of the first dehydration tower, concentrated to ammonia gas with a content of 20%-40% and transported to the second dehydration tower, and water with an ammonia content of less than 50ppm is discharged from the bottom of the first dehydration tower through the first reboiler, and 3%-6% ammonia water in the bottom of the second dehydration tower is returned to the first dehydration tower for circulation and concentration, and the heavy ammonia gas at the top of the tower enters the light removal tower, and the ammonia gas enters the light removal tower. The ammonia gas containing non-condensable gases (O2, N2, H2, CO2, etc.) at the top of the tower is discharged to the tail gas pipe as tail gas, and high-purity liquid ammonia is produced from the bottom of the tower. The high-purity liquid ammonia is pumped into the finished product tank by the light removal tower through the pressure difference, and then enters the use end from the finished product tank. In addition, the ammonia water with a content of 3%-6% condensed at the top of the second dehydration tower can be returned to the interior of the first dehydration tower for concentration again, so as to realize the reuse of the condensed ammonia water.
[0018] 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
[0019] 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.
[0020] Figure 1 A schematic diagram of an ammonia regeneration system using aqueous ammonia as a raw material according to an embodiment of the present application is shown. DETAILED DESCRIPTION
[0021] 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.
[0022] Among them, it needs to 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 utility model 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 cannot be understood as a limitation on the utility model.
[0023] 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0024] 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.
[0025] 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.
[0026] See also Figure 1The ammonia regeneration system using ammonia water as a raw material in the embodiment of the present application includes: a pretreatment unit, a retreatment unit and an impurity removal unit. The pretreatment unit includes: a first dehydration tower 110 and a first dehydration tower 120. The first dehydration tower 110 is used to connect to the ammonia water discharge device, and the bottom of the first dehydration tower 110 is connected to the first dehydration tower 120 to discharge low-content wastewater, and the top is connected to the second dehydration tower 210 to discharge concentrated ammonia. The treatment unit includes: a second dehydration tower 210 and a first condenser 220. The bottom of the second dehydration tower 210 is connected to the top of the first dehydration tower 110 to discharge condensed ammonia water, and the top is connected to the light removal tower 310 through the first condenser 220 to discharge heavy ammonia. The pretreatment unit includes: a light removal tower 310, a second reboiler 330 and a second condenser 320. The top of the light removal tower 310 is connected to the second condenser 320 to discharge non-condensable gas and is connected to the second reboiler 330 to obtain high-purity liquid ammonia.
[0027] In this embodiment, the ammonia water produced by waste gas treatment is used as raw material, which reduces production costs and better meets the environmental protection needs of enterprises compared with the traditional production of industrial ammonia as raw material. The recovered ammonia water is treated by the pretreatment unit to obtain ammonia gas with a higher concentration, which is distilled in a reprocessing unit and finally input into the impurity removal unit to remove other gas impurities to obtain liquid ammonia with higher purity. This purification method is simple and easy to operate, and can obtain ultra-pure ammonia that meets electronic grade standards, which better meets user needs. Specifically, 3%-8% ammonia water is injected into the interior of the first dehydration tower 110, concentrated to an ammonia gas with a content of 20%-40%, and transported to the second dehydration tower 210, and water with an ammonia content of less than 50 ppm is discharged from the bottom of the first dehydration tower 110 through the first dehydration tower 120, and 3%-6% ammonia water in the bottom of the second dehydration tower 210 returns to the first dehydration tower 110 for circulation and concentration, and the deheavy ammonia gas at the top of the tower enters the light removal tower 310, and the ammonia gas enters the light removal tower 310, and the ammonia gas containing non-condensable gases (O2, N2, H2, CO2, etc.) at the top of the tower is discharged to the tail gas pipe as exhaust gas, and the high-purity liquid ammonia extracted from the bottom of the tower is pumped into the finished product tank 400 by the pressure difference from the light removal tower 310, and then enters the use end from the finished product tank 400. In addition, the ammonia water with a content of 3%-6% condensed from the top of the second dehydration tower 210 can be returned to the inside of the first dehydration tower 110 for concentration, thereby realizing the reuse of the condensed ammonia water.
[0028] In a specific embodiment, the first dehydration tower 110 is connected to the second dehydration tower 210 in a loop, so as to discharge the ammonia water condensed in the second dehydration tower 210 into the interior of the first dehydration tower 110, thereby realizing the circulation concentration of the ammonia water, so that the ammonia water can be concentrated to an ammonia gas with a content of 20%-40% and transported to the interior of the second dehydration tower 210.
[0029] In this embodiment, the first condenser 220 is connected to the bottom of the second dehydration tower 210. After the first condenser 220 condenses the ammonia gas, the generated ammonia water will be recovered at the bottom of the second dehydration tower 210 and then returned to the inside of the first dehydration tower 110 for concentration.
[0030] In a specific embodiment, the input end of the first condenser 220 is connected to the top of the second dehydration tower 210, and is used to receive the ammonia inside the second dehydration tower 210 and de-weight the ammonia. The first output end of the first condenser 220 is connected to the de-light tower 310 to transport the de-weighted ammonia to the interior of the de-light tower 310, and the second output end of the first condenser 220 is connected to the interior of the second dehydration tower 210, so that the ammonia water formed after condensation can be discharged into the interior of the second dehydration tower 210, and then discharged into the interior of the first dehydration tower 110 for circulation and concentration.
[0031] In a specific embodiment, the input end of the second condenser 320 is connected to the top of the light-removal tower 310, and is used to receive the ammonia gas inside the light-removal tower 310. The first output end of the second condenser 320 is used to discharge non-condensable gas. The second output end of the second condenser 320 is connected to the interior of the light-removal tower 310, and the liquid ammonia after dehydration can be discharged into the interior of the second dehydration tower 210.
[0032] In a specific embodiment, it also includes: a finished product tank 400. The bottom of the light removal tower 310 is connected to the finished product tank 400 through a second reboiler 330, so that high-purity liquid ammonia can be collected and reused.
[0033] 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 ammonia regeneration system using aqueous ammonia as raw material, characterized in that: include: A pretreatment unit, the pretreatment unit comprising: a first dehydration tower and a first reboiler, the first dehydration tower is suitable for connecting to an ammonia water discharge device, and the bottom of the first dehydration tower is connected to the first reboiler to discharge low-content wastewater, and the top of the first dehydration tower is suitable for connecting to a second dehydration tower to discharge concentrated ammonia gas; The reprocessing unit comprises: a second dehydration tower and a first condenser, the bottom of the second dehydration tower is connected to the top of the first dehydration tower, and condensed ammonia water is discharged into the second dehydration tower, and the top is suitable for connecting to the light removal tower through the first condenser, and the heavy ammonia gas is discharged into the second dehydration tower; The impurity removal unit, the pretreatment unit includes: a light removal tower, a second reboiler and a second condenser, the top of the light removal tower is connected to the second condenser to discharge non-condensable gas, and the bottom is connected to the second reboiler to obtain high-purity liquid ammonia.
2. The ammonia regeneration system using aqueous ammonia as raw material according to claim 1, characterized in that: The first dehydration tower is connected to the second dehydration tower loop.
3. The ammonia regeneration system using aqueous ammonia as raw material according to claim 2, characterized in that: The first condenser is communicated with the bottom of the second dehydration tower.
4. The ammonia regeneration system using aqueous ammonia as raw material according to any one of claims 1 to 3, characterized in that: The input end of the first condenser is communicated with the top of the second dehydration tower; The first output end of the first condenser is communicated with the lightness removal tower; The second output end of the first condenser is communicated with the interior of the second dehydration tower.
5. The ammonia regeneration system using aqueous ammonia as raw material according to claim 1, characterized in that: The input end of the second condenser is communicated with the top of the light removal tower; The first output end of the second condenser discharges non-condensable gas; The second output end of the second condenser is communicated with the interior of the light removal tower.
6. The ammonia regeneration system using aqueous ammonia as raw material according to claim 1, characterized in that: Also includes: Finished cans; The bottom of the light removal tower is connected to the finished product tank through the second reboiler.