Ammonia recovery device based on ternary precursor production line
By designing an ammonia recovery device on the ternary precursor production line, using a blower and hood structure to reduce ammonia volatilization, and combining it with cold water and sulfuric acid absorption, the problems of large ammonia volatilization and high recovery costs were solved, achieving efficient recovery and reuse of ammonia resources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-03-31
AI Technical Summary
Traditional ammonia recovery devices have a large amount of ammonia volatilization in the ammonia storage tank, resulting in low ammonia concentration and high treatment costs for mixed ammonium sulfate and sulfuric acid wastewater.
An ammonia recovery device based on a ternary precursor production line was designed. By combining an ammonia-containing wastewater storage tank, an ammonia recovery component, and a sulfuric acid absorption tower, the device utilizes a blower and hood structure to reduce ammonia volatilization. Combined with cold water and sulfuric acid absorption, it achieves efficient recovery and reuse of ammonia.
This reduces the amount of ammonia volatilization in the ammonia storage tank, increases the concentration of ammonia water, reduces the treatment cost of mixed ammonium sulfate and sulfuric acid wastewater, and achieves efficient recovery and reuse of ammonia resources.
Smart Images
Figure CN224057083U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the field of battery production wastewater recovery, in particular to an ammonia recovery device based on a ternary precursor production line. BACKGROUND
[0002] The current ammonia recovery process for producing ternary precursors mainly uses ammonia-containing wastewater generated during production to remove ammonia in the ammonia removal tower. Another part is to recover ammonia gas escaping from the ammonia-containing storage tank by 2-3 stage ammonia gas absorption columns, and then use sulfuric acid to absorb the ammonia gas to obtain a mixture of ammonium sulfate and sulfuric acid. After adjusting the pH to greater than or equal to 12 by adding liquid alkali, the mixture is fed into the ammonia removal tower for ammonia removal treatment to obtain ammonia water with a concentration of about 10%. The ammonia water is then recycled to the front-end ammonia water storage tank for producing ternary precursors, and the ammonia water is reused in this way.
[0003] However, in the traditional ammonia recycling device, a fan is used to suck the naturally escaping ammonia gas in the ammonia-containing storage tank into the ammonia gas absorption tower. However, since the ammonia gas absorption tower and the ammonia-containing storage tank are connected by a sealed air pipe, the ammonia gas in the ammonia-containing storage tank will volatilize when the naturally escaping ammonia gas in the ammonia-containing storage tank is sucked, which reduces the ammonia content of the ammonia-containing wastewater in the ammonia-containing storage tank. After ammonia removal treatment, the ammonia water obtained has a low concentration. In addition, the mixed wastewater of ammonium sulfate and sulfuric acid generated after the ammonia gas absorption tower absorbs the ammonia gas needs to be adjusted by adding liquid alkali, which increases the recovery cost. CONTENT OF THE UTILITY MODEL
[0004] The purpose of the present disclosure is to overcome the shortcomings of the prior art and provide an ammonia recovery device based on a ternary precursor production line, which can reduce the volatilization of ammonia gas in the ammonia-containing storage tank and reduce the recovery cost.
[0005] The purpose of the present disclosure is achieved by the following technical solutions:
[0006] An ammonia recovery device based on a ternary precursor production line, comprising:
[0007] an ammonia-containing wastewater storage tank;
[0008] an ammonia gas recovery assembly, the ammonia gas recovery assembly comprising a first air pipe, a first air hood, an ammonia gas recovery main pipeline, a cold water absorption tower, a water cooler, a sulfuric acid absorption tower, and an air suction fan, one end of the first air pipe being in communication with a gas outlet end of the ammonia-containing wastewater storage tank, a wind inlet end cover of the first air hood being arranged at the other end of the first air pipe, a wind outlet end of the first air hood being in communication with the ammonia gas recovery main pipeline, the cold water absorption tower, the sulfuric acid absorption tower, and the air suction fan being sequentially arranged on the ammonia gas recovery main pipeline in the ammonia gas conveying direction, and a water outlet end of the water cooler being in communication with a water inlet end of the cold water absorption tower.
[0009] In one of the embodiments, the ammonia recovery pipeline comprises a first ammonia conveying pipeline, a second ammonia conveying pipeline and a third ammonia conveying pipeline, the first ammonia conveying pipeline is in communication with the air outlet end of the first air hood, the air inlet end of the first ammonia conveying pipeline is in communication with the air inlet end of the cold water absorption tower, the air inlet end of the second ammonia conveying pipeline is in communication with the air outlet end of the cold water absorption tower, the air inlet end of the second ammonia conveying pipeline is in communication with the air inlet end of the sulfuric acid absorption tower, the air inlet end of the third ammonia conveying pipeline is in communication with the air outlet end of the sulfuric acid absorption tower, and the air outlet end of the third ammonia conveying pipeline is in communication with the air outlet end of the air blower.
[0010] In one of the embodiments, the water cooling machine comprises a cold water circulation pipeline and a first circulation pump, one end of the cold water circulation pipeline is in communication with one end of the cold water absorption tower, the water outlet end of the cold water circulation pipeline is in communication with the water inlet end of the water cooling machine, and the first circulation pump is arranged on the cold water circulation pipeline.
[0011] In one of the embodiments, the sulfuric acid absorption tower comprises a sulfuric acid circulation pipeline and a second circulation pump, one end of the sulfuric acid circulation pipeline is in communication with the liquid outlet end of the sulfuric acid absorption tower, the liquid inlet end of the sulfuric acid circulation pipeline is in communication, and the second circulation pump is arranged on the sulfuric acid circulation pipeline.
[0012] In one of the embodiments, the ammonia recovery device based on the ternary precursor production line further comprises an ammonia water recovery assembly, the ammonia water recovery assembly comprises a microporous filter, a deamination tower and an ammonia water recycling tank, the water inlet end of the microporous filter is in communication with the water outlet end of the ammonia-containing wastewater storage tank, the water inlet end of the deamination tower is in communication with the water outlet end of the microporous filter, and the water inlet end of the ammonia water recycling tank is in communication with the water outlet end of the deamination tower and the water outlet end of the cold water absorption tower respectively.
[0013] In one of the embodiments, the ammonia water recovery assembly further comprises a wastewater discharge storage tank, the water inlet end of the wastewater discharge storage tank is in communication with the water outlet end of the microporous filter, and the water outlet end of the wastewater discharge storage tank is in communication with the water inlet end of the deamination tower.
[0014] In one of the embodiments, the ammonia water recovery assembly further comprises a second air pipe and a second air hood, one end of the second air pipe is in communication with the air outlet end of the wastewater discharge storage tank, the air inlet end of the second air hood is arranged at the other end of the second air pipe, and the air inlet end of the second air hood is in communication with the ammonia recovery pipeline.
[0015] In one of the embodiments, the first air hood and the second air hood are both horn-shaped air hoods.
[0016] In one of the embodiments, the ammonia water recovery assembly further comprises a first switch valve and a first water pump, both of which are arranged on a pipeline through which the ammonia-containing wastewater storage tank and the microporous filter are communicated.
[0017] In one of the embodiments, the ammonia water recovery assembly further comprises a second switch valve and a second water pump, both of which are arranged on a pipeline through which the ammonia water recycling tank and the cold water absorption tower are communicated.
[0018] In one of the embodiments, the ammonia water recovery assembly further comprises a third switch valve and a third water pump, both of which are arranged on a pipeline through which the wastewater discharge storage tank and the deamination tower are communicated.
[0019] Compared with the prior art, the present disclosure has at least the following advantages:
[0020] 1. The ammonia gas naturally escaping from the ammonia-containing wastewater storage tank is discharged through the first air pipe, and the air inlet end cover of the first air cover is arranged on the first air pipe. The naturally escaping ammonia gas is sucked into the ammonia gas recovery main pipeline by driving the air extractor, and the first air pipe and the ammonia gas recovery main pipeline are not directly communicated, which can avoid the negative pressure influence of the air extractor, reduce the ammonia gas volatilization amount in the ammonia-containing wastewater storage tank, increase the ammonia content of the ammonia-containing wastewater in the ammonia-containing wastewater storage tank, and make the ammonia water concentration obtained after subsequent deamination treatment higher.
[0021] 2. By making the naturally escaping ammonia gas flow through the cold water absorption tower and the sulfuric acid absorption tower in turn, and then providing cold water for the cold water absorption tower through the water cooler, most of the ammonia gas in the ammonia gas recovery main pipeline is absorbed by the cold water to become ammonia water. The ammonia water in the cold water absorption tower can be recycled to the ternary precursor production end, realizing the recycling and reuse of ammonia resources and saving production cost. The remaining small part of ammonia gas in the ammonia gas recovery main pipeline flows into the sulfuric acid absorption tower to be absorbed by sulfuric acid to form a small part of mixed wastewater of ammonium sulfate and sulfuric acid, which can reduce the treatment cost of the mixed wastewater of ammonium sulfate and sulfuric acid, thereby reducing the recovery cost. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0023] Figure 1 is a structural schematic view of an ammonia recovery device based on a ternary precursor production line in an embodiment;
[0024] Figure 2Fig. 1 is a schematic diagram of a partial structure of an ammonia recovery device based on a ternary precursor production line according to an embodiment of the present disclosure; Figure 1 Fig. 1 is a schematic diagram of a partial structure of an ammonia recovery device based on a ternary precursor production line according to an embodiment of the present disclosure;
[0025] Figure 3 Fig. 1 is a schematic diagram of a partial structure of an ammonia recovery device based on a ternary precursor production line according to an embodiment of the present disclosure; Figure 1 Fig. 1 is a schematic diagram of a partial structure of an ammonia recovery device based on a ternary precursor production line according to an embodiment of the present disclosure;
[0026] Figure 4 Fig. 1 is a schematic diagram of a partial structure of an ammonia recovery device based on a ternary precursor production line according to an embodiment of the present disclosure;
[0027] Fig. 1 is a schematic diagram of a partial structure of an ammonia recovery device based on a ternary precursor production line according to an embodiment of the present disclosure;
[0028] Fig. 1 is a schematic diagram of a partial structure of an ammonia recovery device based on a ternary precursor production line according to an embodiment of the present disclosure;
[0029] Fig. 1 is a schematic diagram of a partial structure of an ammonia recovery device based on a ternary precursor production line according to an embodiment of the present disclosure;
[0030] Fig. 1 is a schematic diagram of a partial structure of an ammonia recovery device based on a ternary precursor production line according to an embodiment of the present disclosure; DETAILED DESCRIPTION
[0031] For the purpose of the present disclosure, the following description will be made with reference to the accompanying drawings. In the drawings, the preferred embodiments of the present disclosure are shown. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present disclosure can be understood more thoroughly and completely.
[0032] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are intended for illustrative purposes only and are not intended to be the only embodiment.
[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0034] Please see Figures 1 to 3 To better understand the ammonia recovery device 10 based on a ternary precursor production line of this disclosure, the following further explanation of the ammonia recovery device 10 based on a ternary precursor production line is provided:
[0035] An ammonia recovery device 10 based on a ternary precursor production line according to one embodiment includes an ammonia-containing wastewater storage tank 100 and an ammonia recovery assembly 200. The ammonia recovery assembly 200 includes a first duct 210, a first hood 220, an ammonia recovery main pipeline 230, a cold water absorption tower 240, a water chiller 250, a sulfuric acid absorption tower 260, and an exhaust fan 270. One end of the first duct 210 is connected to the outlet of the ammonia-containing wastewater storage tank 100. The inlet of the first hood 220 is covered by the other end of the first duct 210. The outlet of the first hood 220 is connected to the ammonia recovery main pipeline 230. The cold water absorption tower 240, the sulfuric acid absorption tower 260, and the exhaust fan 270 are sequentially arranged on the ammonia recovery main pipeline 230 along the ammonia conveying direction. The outlet of the water chiller 250 is connected to the inlet of the cold water absorption tower 240.
[0036] In this embodiment, the ammonia gas that naturally escapes from the ammonia-containing wastewater storage tank 100 is discharged through the first duct 210, and the air inlet end of the first hood 220 is covered on the first duct 210. By driving the exhaust fan 270, the naturally escaped ammonia gas is drawn into the ammonia recovery main pipeline 230. Moreover, the first duct 210 and the ammonia recovery main pipeline 230 are not directly connected, which can eliminate the negative pressure effect of the exhaust fan 270, reduce the amount of ammonia volatilization in the ammonia-containing wastewater storage tank 100, increase the ammonia content of the ammonia-containing wastewater in the ammonia-containing wastewater storage tank 100, and make the ammonia water recovered after subsequent ammonia removal treatment have a higher concentration.
[0037] Furthermore, by allowing the naturally escaping ammonia gas to flow sequentially through a cold water absorption tower 240 and a sulfuric acid absorption tower 260, and then supplying cold water to the cold water absorption tower 240 via a water chiller 250, most of the ammonia gas in the ammonia recovery main pipeline 230 is absorbed by the cold water to form ammonia water. The ammonia water in the cold water absorption tower 240 can be reused at the ternary precursor production end, realizing the recovery and reuse of ammonia resources and saving production costs. The remaining small portion of ammonia gas in the ammonia recovery main pipeline 230 flows into the sulfuric acid absorption tower 260 and is absorbed by sulfuric acid to form a small portion of mixed wastewater of ammonium sulfate and sulfuric acid, which can reduce the treatment cost of mixed wastewater of ammonium sulfate and sulfuric acid, thereby reducing the recovery cost.
[0038] It should be noted that, since the cold water absorption tower 240, the sulfuric acid absorption tower 260 and the exhaust fan 270 are sequentially arranged on the ammonia gas recovery main pipeline 230 in the ammonia gas conveying direction, that is, by driving the exhaust fan 270 to output negative pressure suction force, the ammonia gas and air naturally escaping from the first air pipe 210 are sucked to the ammonia gas recovery main pipeline 230 to form an ammonia gas mixed gas stream, and the ammonia gas in the ammonia gas mixed gas stream is completely absorbed after passing through the cold water absorption tower 240 and the sulfuric acid absorption tower 260, and the remaining air stream is discharged from the exhaust end of the exhaust fan 270. Further, since the solubility of ammonia gas in water decreases with the increase of temperature, at 0℃, 1 volume of water can dissolve 1000 volumes of ammonia gas, and the solubility is extremely high. In the present embodiment, the outlet water temperature of the water cooler 250 is 0-10℃, which improves the ammonia gas absorption efficiency, reduces the processing pressure of the sulfuric acid absorption tower 260, thereby reducing the output of the mixed waste water of ammonium sulfate and sulfuric acid, and further reducing the output of liquid alkali, thereby reducing the recovery cost.
[0039] It should be noted that, Figure 4 The working principle diagram of the water cooler 250, the present disclosure only protects the connection relationship between the water cooler 250 and each component, and the working operation mode of the water cooler 250 belongs to the prior art, which is not within the protection scope of the present disclosure.
[0040] As Figure 1As shown, in one embodiment, the ammonia recovery main pipeline 230 includes a first ammonia conveying pipeline 2310, a second ammonia conveying pipeline 2320, and a third ammonia conveying pipeline 2330. The inlet end of the first ammonia conveying pipeline 2310 is connected to the outlet end of the first hood 220, the outlet end of the first ammonia conveying pipeline 2310 is connected to the inlet end of the cold water absorption tower 240, the inlet end of the second ammonia conveying pipeline 2320 is connected to the outlet end of the cold water absorption tower 240, the outlet end of the second ammonia conveying pipeline 2320 is connected to the inlet end of the sulfuric acid absorption tower 260, the inlet end of the third ammonia conveying pipeline 2330 is connected to the outlet end of the sulfuric acid absorption tower 260, and the outlet end of the third ammonia conveying pipeline 2330 is connected to the exhaust end of the exhaust fan 270. Understandably, by driving the exhaust fan 270, the ammonia gas escaping naturally from the first duct 210 and the air form an ammonia gas mixture that first flows into the first ammonia gas delivery pipe 2310. This mixture then flows through the first ammonia gas delivery pipe 2310 to the cold water absorption tower 240, where it is absorbed by cold water spray, removing most of the ammonia gas. Next, the ammonia gas mixture flows through the second ammonia gas delivery pipe 2320 to the sulfuric acid absorption tower 260, where it is absorbed by sulfuric acid spray, removing the remaining small amount of ammonia gas and converting it into air. This air then flows through the third ammonia gas delivery pipe 2330 to the exhaust fan 270 and is discharged from the exhaust end of the exhaust fan 270. This effectively reduces the ammonia evaporation from the ammonia-containing wastewater storage tank 100, increases the ammonia content of the ammonia-containing wastewater in the tank 100, and simultaneously reduces the output of the mixed wastewater of ammonium sulfate and sulfuric acid, thus lowering recovery costs.
[0041] like Figure 1 As shown, in one embodiment, the water chiller 250 includes a cold water circulation pipe 2510 and a first circulation pump 2520. One end of the cold water circulation pipe 2510 is connected to one end of the cold water absorption tower 240, and the outlet end of the cold water circulation pipe 2510 is connected to the inlet end of the water chiller 250. The first circulation pump 2520 is installed on the cold water circulation pipe 2510. It is understood that since the temperature of the cold water output from the water chiller 250 rises after contacting the ammonia gas mixture, resulting in a decrease in solubility, the first circulation pump 2520 drives the ammonia water in the cold water absorption tower 240 back to the water chiller 250 through the cold water circulation pipe 2510 for cooling. This allows the cold water to absorb ammonia gas to the maximum extent, increasing the ammonia concentration after ammonia absorption treatment in the cold water absorption tower 240. The ammonia water in the cold water absorption tower 240 can be directly reused at the ternary precursor production end, realizing the recycling and reuse of ammonia resources.
[0042] like Figure 1As shown, in one embodiment, the sulfuric acid absorption tower 260 includes a sulfuric acid circulation pipe 2610 and a second circulation pump 2620. One end of the sulfuric acid circulation pipe 2610 is connected to the outlet end of the sulfuric acid absorption tower 260, and the inlet end of the sulfuric acid circulation pipe 2610 is also connected. The second circulation pump 2620 is installed on the sulfuric acid circulation pipe 2610. It is understood that the sulfuric acid solution is added to the sulfuric acid absorption tower 260 in advance. By driving the second circulation pump 2620, the sulfuric acid absorbent is returned from the lower outlet end of the sulfuric acid absorption tower 260 to the upper inlet end of the sulfuric acid absorption tower 260 through the sulfuric acid circulation pipe 2610. This allows the sulfuric acid absorbent to fully absorb ammonia, improving the ammonia treatment efficiency, reducing the output of mixed ammonium sulfate and sulfuric acid wastewater, and thus reducing recovery costs.
[0043] like Figure 1 As shown, in one embodiment, the ammonia recovery device 10 based on the ternary precursor production line further includes an ammonia water recovery component 300. The ammonia water recovery component 300 includes a microporous filter 310, an ammonia removal tower 320, and an ammonia water reuse tank 330. The inlet of the microporous filter 310 is connected to the outlet of the ammonia-containing wastewater storage tank 100, the inlet of the ammonia removal tower 320 is connected to the outlet of the microporous filter 310, and the inlet of the ammonia water reuse tank 330 is connected to both the outlet of the ammonia removal tower 320 and the outlet of the cold water absorption tower 240. It can be understood that the microporous filter 310 removes impurities from the ammonia-containing wastewater, and the ammonia removal tower 320 then treats the ammonia-containing wastewater to remove ammonia. After the ammonia removal treatment, ammonia water is formed and stored in the ammonia water reuse tank 330, thus achieving ammonia recovery from the ammonia-containing wastewater. Meanwhile, the ammonia water generated in the cold water absorption tower 240 is returned to the ammonia water recycling tank 330, which can recover ammonia resources to the greatest extent. The ammonia water in the ammonia water recycling tank 330 can be reused in the production of ternary precursors, thereby saving the production cost of batteries.
[0044] like Figure 1 As shown, in one embodiment, the ammonia recovery assembly 300 further includes a wastewater discharge tank 340. The inlet of the wastewater discharge tank 340 is connected to the outlet of the microporous filter 310, and the outlet of the wastewater discharge tank 340 is connected to the inlet of the ammonia removal tower 320. It is understood that the wastewater discharge tank 340 is provided to handle the large volume of ammonia-containing wastewater treatment needs and to prevent the ammonia removal tower 320 from overloading.
[0045] like Figure 1 and Figure 3As shown in the drawings, in one of the embodiments, the ammonia recovery assembly 200 further comprises a second air pipe 280 and a second air hood 290, one end of the second air pipe 280 is communicated with the air outlet end of the wastewater discharge tank 340, the air inlet end of the second air hood 290 is arranged at the other end of the second air pipe 280, and the air inlet end of the second air hood 290 is communicated with the ammonia recovery main pipeline 230. It can be understood that there will also be natural escape of ammonia gas in the wastewater discharge tank 340, the ammonia gas naturally escaped from the second air pipe 280 is collected by the second air hood 290 and flows through the cold water absorption tower 240 and the sulfuric acid absorption tower 260 in turn by the ammonia recovery main pipeline 230, so that the ammonia resource can be recovered to the maximum extent.
[0046] As shown in the drawings, Figure 1 and Figure 3 As shown in the drawings, in one of the embodiments, the first air hood 220 and the second air hood 290 are both horn-shaped air hoods. It can be understood that the horn-shaped air hood can completely collect the natural escape of ammonia gas, and has higher collection efficiency than the square or circular air hood, thereby avoiding ammonia gas leakage into the workshop.
[0047] As shown in the drawings, Figure 1 As shown in the drawings, in one of the embodiments, the ammonia water recovery assembly 300 further comprises a first switch valve 350 and a first water pump 360, both of which are arranged on the pipeline communicated with the ammonia-containing wastewater tank 100 and the microporous filter 310. It can be understood that the first switch valve 350 and the first water pump 360 are used to control the ammonia-containing wastewater discharge switch of the ammonia-containing wastewater tank 100, thereby improving the automation of the ammonia recovery device 10.
[0048] As shown in the drawings, Figure 1 As shown in the drawings, in one of the embodiments, the ammonia water recovery assembly 300 further comprises a second switch valve 370 and a second water pump 380, both of which are arranged on the pipeline communicated with the ammonia water recycling tank 330 and the cold water absorption tower 240. It can be understood that the second switch valve 370 and the second water pump 380 are used to control the ammonia water discharge switch of the cold water absorption tower 240. When the cold water in the cold water absorption tower 240 fully absorbs the ammonia gas, the second switch valve 370 and the second water pump 380 are opened, so that the ammonia water in the cold water absorption tower 240 flows back to the ammonia water recycling tank 330, thereby realizing the recycling and reuse of ammonia resources.
[0049] As shown in the drawings, Figure 1 As shown in the drawings, in one of the embodiments, the ammonia water recovery assembly 300 further comprises a third switch valve 390 and a third water pump 3100, both of which are arranged on the pipeline communicated with the wastewater discharge tank 340 and the deamination tower 320. It can be understood that the third switch valve 390 and the third water pump 3100 are used to control the ammonia-containing wastewater discharge switch of the wastewater discharge tank 340, thereby improving the automation of the ammonia recovery device 10.
[0050] Compared with the prior art, the present disclosure has at least the following advantages:
[0051] 1. The ammonia gas naturally escaping from the ammonia-containing wastewater storage tank is discharged by the first air pipe, and the air inlet end cover of the first air hood is arranged on the first air pipe. The naturally escaping ammonia gas is sucked into the ammonia gas recovery main pipeline by driving the air extractor to output, and the first air pipe and the ammonia gas recovery main pipeline are not directly connected, which can avoid the negative pressure influence of the air extractor, reduce the ammonia gas volatilization amount in the ammonia-containing wastewater storage tank, increase the ammonia content of the ammonia-containing wastewater in the ammonia-containing wastewater storage tank, and make the ammonia water concentration obtained after subsequent ammonia removal treatment higher.
[0052] 2. By making the naturally escaping ammonia gas flow through the cold water absorption tower and the sulfuric acid absorption tower in turn, and then providing cold water for the cold water absorption tower by the water cooler, most of the ammonia gas in the ammonia gas recovery main pipeline is absorbed by the cold water to become ammonia water, and the ammonia water in the cold water absorption tower can be reused to the ternary precursor production end, realizing the recycling and reuse of ammonia resources and saving production cost. The remaining small part of ammonia gas in the ammonia gas recovery main pipeline flows into the sulfuric acid absorption tower and is absorbed by sulfuric acid to form a small part of ammonium sulfate and sulfuric acid mixed wastewater, which can reduce the treatment cost of ammonium sulfate and sulfuric acid mixed wastewater, thereby reducing the recovery cost.
[0053] The above-described embodiments only express several embodiments of the present disclosure, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the disclosed patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present disclosure, a number of modifications and improvements can be made, which are within the scope of the present disclosure. Therefore, the protection scope of the present disclosure patent should be subject to the appended claims.
Claims
1. An ammonia recovery device (10) based on a ternary precursor production line, characterized by, The application relates to an ammonia gas recovery system. The ammonia gas recovery system comprises an ammonia-containing wastewater storage tank (100), an ammonia gas recovery assembly (200), a first air pipe (210), a first air hood (220), an ammonia gas recovery main pipe (230), a cold water absorption tower (240), a water cooler (250), a sulfuric acid absorption tower (260) and an air extractor (270), one end of the first air pipe (210) is communicated with a gas outlet end of the ammonia-containing wastewater storage tank (100), an air inlet end cover of the first air hood (220) is arranged at the other end of the first air pipe (210), an air outlet end of the first air hood (220) is communicated with the ammonia gas recovery main pipe (230), the cold water absorption tower (240), the sulfuric acid absorption tower (260) and the air extractor (270) are sequentially arranged on the ammonia gas recovery main pipe (230) in the ammonia gas conveying direction, and a water outlet end of the water cooler (250) is communicated with a water inlet end of the cold water absorption tower (240). The ammonia gas recovery main pipe (230) comprises a first ammonia gas conveying pipe (2310), a second ammonia gas conveying pipe (2320) and a third ammonia gas conveying pipe (2330), an air inlet end of the first ammonia gas conveying pipe (2310) is communicated with an air outlet end of the first air hood (220), an air outlet end of the first ammonia gas conveying pipe (2310) is communicated with an air inlet end of the cold water absorption tower (240), an air inlet end of the second ammonia gas conveying pipe (2320) is communicated with an air outlet end of the cold water absorption tower (240), an air outlet end of the second ammonia gas conveying pipe (2320) is communicated with an air inlet end of the sulfuric acid absorption tower (260), an air inlet end of the third ammonia gas conveying pipe (2330) is communicated with an air outlet end of the sulfuric acid absorption tower (260), and an air outlet end of the third ammonia gas conveying pipe (2330) is communicated with an air extraction end of the air extractor (270).
2. Ammonia recovery unit (10) based on a ternary precursor production line according to claim 1, characterized in that, The water cooler (250) comprises a cold water circulating pipe (2510) and a first circulating pump (2520), one end of the cold water circulating pipe (2510) is communicated with one end of the cold water absorption tower (240), a water outlet end of the cold water circulating pipe (2510) is communicated with a water inlet end of the water cooler (250), and the first circulating pump (2520) is arranged on the cold water circulating pipe (2510).
3. The ammonia recovery unit (10) based on a ternary precursor production line according to claim 1, characterized in that, The sulfuric acid absorption tower (260) comprises a sulfuric acid circulating pipe (2610) and a second circulating pump (2620), one end of the sulfuric acid circulating pipe (2610) is communicated with a liquid outlet end of the sulfuric acid absorption tower (260), a liquid inlet end of the sulfuric acid circulating pipe (2610) is communicated, and the second circulating pump (2620) is arranged on the sulfuric acid circulating pipe (2610).
4. The ammonia recovery device (10) based on a ternary precursor production line according to claim 1, characterized in that, 5. The ammonia recovery unit (10) based on a ternary precursor production line according to claim 1, characterized in that, The ammonia water recovery assembly (300) further comprises a waste water discharge tank (340), a water inlet end of the waste water discharge tank (340) being communicated with a water outlet end of the microporous filter (310), and a water outlet end of the waste water discharge tank (340) being communicated with a water inlet end of the deamination tower (320).
6. Ammonia recovery unit (10) based on a ternary precursor production line according to claim 5, characterized in that, The ammonia water recovery assembly (300) further comprises a waste water discharge tank (340), a water inlet end of the waste water discharge tank (340) being communicated with a water outlet end of the microporous filter (310), and a water outlet end of the waste water discharge tank (340) being communicated with a water inlet end of the deamination tower (320).
7. Ammonia recovery unit (10) based on a ternary precursor production line according to claim 6, characterized in that, The ammonia water recovery assembly (300) further comprises a second air pipe (280) and a second air hood (290), one end of the second air pipe (280) being communicated with a gas outlet end of the waste water discharge tank (340), and an air inlet end of the second air hood (290) being disposed at the other end of the second air pipe (280) and being communicated with the ammonia water recovery main pipe (230).
8. Ammonia recovery unit (10) based on a ternary precursor production line according to claim 7, characterized in that, The first air hood (220) and the second air hood (290) are both horn-shaped air hoods.
9. The ammonia recovery unit (10) based on a ternary precursor production line according to claim 5, characterized in that, The ammonia water recovery assembly (300) further comprises a first switch valve (350) and a first water pump (360), both of which are arranged on a pipeline communicated between the ammonia-containing waste water storage tank (100) and the microporous filter (310); and / or, The ammonia water recovery assembly (300) further comprises a second switch valve (370) and a second water pump (380), both of which are arranged on a pipeline communicated between the ammonia water recycling tank (330) and the cold water absorption tower (240).
10. The ammonia recovery unit (10) based on a ternary precursor production line according to claim 6, characterized in that, The ammonia water recovery assembly (300) further comprises a third switch valve (390) and a third water pump (3100), both of which are arranged on a pipeline communicated between the waste water discharge tank (340) and the deamination tower (320).