Recycling device

Abstract

The utility model discloses a recovery device. The recovery device comprises a reaction barrel, a distillation tower, a first pipeline and a buffer barrel, a reaction cavity is formed in the reaction barrel, a distillation cavity is formed in the distillation tower, the first pipeline is arranged between the reaction barrel and the distillation tower, the first pipeline is provided with a first end and a second end which are opposite, the first end is communicated with the reaction cavity, and the second end is communicated with the distillation cavity and used for guiding reaction products in the reaction cavity to the distillation cavity; one end of the buffer barrel is communicated with the first end, and the other end is communicated with the distillation cavity for buffering reaction products. The first pipeline is arranged between the reaction barrel and the distillation tower, and reaction products in the reaction cavity are guided into the distillation cavity; meanwhile, the buffer barrel is arranged between the reaction barrel and the distillation tower, and when the flow of the reaction product introduced into the distillation cavity is increased, part of the reaction product flows into and is temporarily stored in the buffer barrel, so that the flow of the reaction product flowing into the distillation cavity is slowed down, the reaction product can be in full contact with steam, and the recovery effect of ammonia is improved.

Description

Technical Field

[0001] This application belongs to the field of soda ash production technology, specifically relating to a recovery device. Background Technology

[0002] In the current ammonia-soda process for producing soda ash, in order to recover ammonia from the preheated mother liquor, lime slurry and preheated mother liquor are fed into a pre-ash tank for mixing and reaction during the distillation process. The reaction product is then sent to a distillation tower for steam distillation, and finally the distilled ammonia is recovered and reused.

[0003] In related technologies, the flow rate of reaction products in the pre-ash tank when entering the distillation tower is unstable, which affects the recovery of ammonia. Utility Model Content

[0004] This application aims to provide a recovery device that can solve the problem of unstable flow rate of reaction products flowing into the distillation column from the pre-ash tank in related technologies, which affects ammonia recovery.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] This application provides a recycling device, including: a reaction tank, a distillation column, a first pipeline, and a buffer tank;

[0007] The reaction tank has a reaction chamber, and the distillation column has a distillation chamber. The first pipe is located between the reaction tank and the distillation column. The first pipe has a first end and a second end, which are connected to the reaction chamber. The first end is connected to the distillation chamber, and the second end is connected to the distillation chamber. The first pipe is used to guide the reaction products in the reaction tank to the distillation chamber. One end of the buffer tank is connected to the first end, and the other end is connected to the distillation chamber. The buffer tank is used to buffer the reaction products.

[0008] Optionally, the recovery device further includes a regulating valve located on the side of the first pipe near the second end, for regulating the flow rate of the reaction product introduced into the distillation chamber through the first pipe.

[0009] Optionally, the reaction vessel is provided with a first outlet, and the distillation column is provided with a first inlet. The first end is connected to the first outlet, and the second end is connected to the first inlet. In the vertical direction, the first inlet is higher than the first outlet.

[0010] Optionally, the distillation column is provided with a second inlet, and the buffer tank is connected to the second inlet. In the vertical direction, the second inlet is higher than the first outlet.

[0011] Optionally, the second inlet is higher than the first inlet in the vertical direction.

[0012] Optionally, the buffer tank is provided with a second outlet, which is higher than the first outlet in the vertical direction, and the second inlet is higher than the second outlet.

[0013] Optionally, the distillation column includes a column body and a partition plate. The column body has a chamber, and the partition plate is disposed in the chamber to divide the chamber into two chambers, one of which is a heating chamber and the other is the distillation chamber. The heating chamber is located above the distillation chamber, and the partition plate allows gas in the distillation chamber to flow unidirectionally to the heating chamber. The heating chamber is used to heat the reaction liquid and provide the heated reaction liquid to the reaction chamber.

[0014] Optionally, the tower body is provided with a third inlet, which is connected to the heating chamber and is used to introduce the reaction liquid into the heating chamber; and / or, the recovery device further includes a second pipe, one end of which is connected to the reaction chamber and the other end of which is connected to the end of the heating chamber near the partition plate, and the second pipe is used to introduce the reaction liquid in the heating chamber into the reaction chamber.

[0015] Optionally, the recovery device further includes a third pipe, one end of which is connected to the reaction chamber and the other end of which is connected to the end of the heating chamber near the partition plate, for introducing the gas in the reaction chamber into the heating chamber.

[0016] Optionally, the buffer tank is provided with a buffer chamber for buffering the reaction products, and the inner wall of the buffer chamber is provided with a heat insulation layer; and / or, the recovery device further includes a stirring mechanism, which extends at least partially into the reaction chamber for stirring the reaction liquid.

[0017] In the embodiments of this application, by providing a first pipe between the reaction tank and the distillation column, the reaction products in the reaction chamber can be introduced into the distillation chamber. Simultaneously, a buffer tank is provided between the reaction tank and the distillation column. When the flow rate of the reaction products introduced into the distillation chamber from the reaction chamber suddenly increases, some of the reaction products will flow into the buffer tank and be temporarily buffered there, slowing down the flow rate of the reaction products into the distillation chamber. This stabilizes the flow rate of the reaction products entering the distillation chamber, allowing them to fully contact the steam, thereby improving the ammonia recovery effect.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of a recycling device according to an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of a recycling device according to an embodiment of this application.

[0022] Figure label:

[0023] 100-Reaction tank, 110-First outlet, 200-Distillation tower, 210-First inlet, 220-Second inlet, 230-Tower body, 240-Baffle plate, 250-Cavity, 251-Heating chamber, 252-Distillation chamber, 260-Third inlet, 270-Third outlet, 280-Steam inlet, 290-Waste liquid outlet, 300-First pipeline, 400-Buffer tank, 410-Second outlet, 500-Regulating valve, 600-Stirring mechanism, 610-Rotating rod, 620-Impeller, 700-Third pipeline, 800-Second pipeline. Detailed Implementation

[0024] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] Before explaining the recycling device in the embodiments of this application, the application scenarios of the recycling device will be described in detail:

[0029] In the ammonia-soda process for producing soda ash, ammonia is continuously circulated, a process achieved through distillation. The ammonia stripping step utilizes distillation equipment to recover ammonia and carbon dioxide from the soda ash mother liquor and other ammonia-containing wastewater. Ammonia in the mother liquor generally exists in two forms: free ammonia, including ammonium carbonate ((NH4)2CO3) and ammonium hydroxide (NH4OH), and fixed ammonium, existing as ammonium chloride (NH4Cl) or ammonium sulfate ((NH4)2SO4). Free ammonia can be removed directly by heating and boiling, while fixed ammonium requires the addition of lime milk (Ca(OH)2) for chemical decomposition, followed by ammonia recovery through heating and distillation.

[0030] Therefore, the ammonia recovery process is usually divided into three steps: First, the free ammonia in the mother liquor is separated from the liquid phase by heating; then, the mother liquor is fed into a reaction tank, and lime slurry is fed into the reaction tank at the same time. The lime slurry mixes with the mother liquor and undergoes a chemical reaction to form reaction products; finally, the reaction products are fed from the reaction tank into a distillation tower, and the free ammonia generated by the reaction of lime slurry and fixed ammonium is heated and distilled off through distillation.

[0031] In related technologies, the reaction products in the reaction tank enter the distillation column by gravity due to the pressure difference between the reaction tank and the distillation column. During this process, the pressure difference is affected by factors such as the gas pressure in the distillation column, the vacuum level in the reaction tank, the amount of mother liquor, and the amount of lime slurry. When any of these factors changes, the pressure difference between the reaction tank and the distillation column changes. This change in pressure difference leads to a change in the flow rate of the reaction products entering the distillation column. When the flow rate of the reaction products suddenly increases, if the steam in the distillation column is not adjusted in time, the reaction products and steam cannot make sufficient contact. Some of the reaction products cannot distill off the free ammonia through distillation, causing the ammonia to be discharged from the distillation column with the distillation waste liquid, thus affecting the ammonia recovery efficiency.

[0032] Therefore, this application provides a recovery device that can stabilize the flow rate of the reaction product into the distillation column when the pressure difference between the reaction tank and the distillation column changes due to factors such as vacuum degree and mother liquor volume, so that the reaction product can fully contact the steam to carry out the distillation heating process, thereby improving the ammonia recovery effect.

[0033] The recycling device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0034] like Figure 1 and Figure 2 As shown, a recovery device according to some embodiments of this application includes: a reaction tank 100, a distillation column 200, a first pipe 300, and a buffer tank 400; the reaction tank 100 is provided with a reaction chamber, the distillation column 200 is provided with a distillation chamber, the first pipe 300 is disposed between the reaction tank 100 and the distillation column 200, the first pipe 300 has a first end and a second end opposite to each other, the first end is connected to the reaction chamber, and the second end is connected to the distillation chamber, for guiding the reaction products in the reaction chamber to the distillation chamber; one end of the buffer tank 400 is connected to the first end, and the other end is connected to the distillation chamber, for buffering the reaction products.

[0035] In this embodiment of the application, by providing a first pipe 300 between the reaction tank 100 and the distillation column 200, the reaction products in the reaction chamber can be introduced into the distillation chamber. At the same time, a buffer tank 400 is provided between the reaction tank 100 and the distillation column 200. When the flow rate of the reaction products introduced into the distillation chamber from the reaction chamber suddenly increases, some of the reaction products will flow into the buffer tank 400 and be temporarily buffered in the buffer tank 400, which slows down the flow rate of the reaction products flowing into the distillation chamber, stabilizes the flow rate of the reaction products entering the distillation chamber, and enables them to fully contact the steam, thereby improving the ammonia recovery effect.

[0036] Specifically, the recovery device of this application can be applied to ammonia recovery processes. In practical applications, the reaction liquid includes mother liquor and lime slurry. The mother liquor, heated to a preset temperature, is introduced into the reaction chamber, and simultaneously, lime slurry is introduced into the reaction chamber. The lime slurry and the preheated mother liquor mix in the reaction chamber and undergo a chemical reaction to generate reaction products. Under the pressure difference between the reaction chamber and the distillation chamber, the reaction products are introduced from the reaction chamber into the distillation chamber through the first pipe 300. The bottom of the distillation tower 200 is provided with a steam inlet 280 and a waste liquid outlet 290, both of which are connected to the distillation chamber. The steam inlet 280 is used to introduce distillation gas into the distillation chamber, and the waste liquid outlet 290 is used to discharge waste liquid from the distillation tower 200.

[0037] Furthermore, the distillation gas comes into contact with the reaction products introduced into the distillation chamber, distilling and heating the reaction products. The free ammonia in the reaction products is discharged after heating and distillation, and the remaining waste liquid is discharged through the waste liquid outlet 290. When the flow rate of lime slurry or mother liquor entering the reaction chamber suddenly increases, the pressure in the reaction chamber changes, or the flow rate of steam entering through the steam inlet 280 changes, the flow rate of reaction products entering the first pipe 300 from the reaction chamber suddenly increases. At this time, the excess reaction products enter the buffer tank 400, reducing the flow rate of reaction products entering the distillation chamber through the second end of the first pipe 300.

[0038] Optionally, such as Figure 1 and Figure 2 As shown, the recovery device also includes a regulating valve 500, which is located on the side of the first pipe 300 near the second end, and is used to regulate the flow rate of the reaction products introduced into the distillation chamber from the first pipe 300.

[0039] In this embodiment of the application, a regulating valve 500 is provided on the side of the first pipe 300 near the second end. When the flow rate of the reaction product entering the first pipe 300 changes, the flow rate of the reaction product entering the distillation chamber can be increased or decreased by changing the position of the valve core or the opening of the valve in the regulating valve 500, thereby controlling the flow rate of the reaction product within a preset range.

[0040] Specifically, the distillation chamber is equipped with a sieve plate and a downcomer (not shown in the figure). The sieve plate has several pores with a diameter of 3-8 mm to uniformly disperse the distillation gas; the downcomer is the channel for the reaction products to flow from the upper tray to the lower tray. The flow rate of the reaction products entering the distillation chamber is generally 200 m³ / s. 3 / s, when the flow rate of the reaction product entering the first pipe 300 changes, the regulating valve 500 can control the flow rate of the reaction product introduced into the distillation chamber to be within 200±10m. 3 Within a range of / s, the flow of reaction products through the sieve plate and downcomer remains stable, thereby reducing clogging of the sieve plate and downcomer and improving production stability.

[0041] In some embodiments, the regulating valve may be a pneumatic regulating valve, an electric regulating valve, or a hydraulic regulating valve, used to regulate the flow rate of the reaction products entering the distillation chamber. Of course, the selection of the regulating valve can be determined according to the actual production situation, and this embodiment does not limit it.

[0042] Optionally, such as Figure 1 and Figure 2As shown, the reaction vessel 100 is provided with a first outlet 110, and the distillation column 200 is provided with a first inlet 210. The first end is connected to the first outlet 110, and the second end is connected to the first inlet 210. In the vertical direction, the first inlet 210 is higher than the first outlet 110.

[0043] In this embodiment of the application, the position of the first inlet 210 is higher than that of the first outlet 110 in the vertical direction, which can prevent the reaction liquid (such as lime milk and mother liquor) flowing into the reaction chamber from directly entering the distillation chamber from the reaction chamber, so that the reaction liquid has sufficient time to mix and undergo chemical reaction in the reaction chamber, thereby generating reaction products that enter the distillation chamber.

[0044] Specifically, in an actual production workshop, the reaction vessel 100 and the distillation column 200 can be placed directly on a horizontal surface, with the first inlet 210 being higher than the first outlet 110. Of course, the placement of the reaction vessel 100 and the distillation column 200 can be determined based on actual production conditions, and this embodiment does not impose any restrictions on them.

[0045] Optionally, such as Figure 1 and Figure 2 As shown, the distillation column 200 is provided with a second inlet 220, and the buffer tank 400 is connected to the second inlet 220. In the vertical direction, the second inlet 220 is higher than the first outlet 110.

[0046] In this embodiment of the application, the height of the second inlet 220 is set to be higher than that of the first outlet 110 in the vertical direction. This can prevent the reaction products flowing from the reaction tank 100 into the buffer tank 400 from flowing directly into the distillation column 200, thereby allowing the reaction products to be buffered in the buffer tank 400 and achieving the purpose of stabilizing the flow rate of the reaction products entering the distillation column 200.

[0047] Optionally, such as Figure 1 and Figure 2 As shown, in the vertical direction, the second inlet 220 is higher than the first inlet 210.

[0048] In this embodiment of the application, the height of the second inlet 220 is set to be higher than that of the first inlet 210 in the vertical direction. This can prevent the reaction products from flowing directly from the reaction tank 100 into the buffer tank 400, thereby avoiding insufficient flow of the reaction products introduced into the distillation column 200, which would affect the recovery of ammonia.

[0049] Optionally, such as Figure 1 and Figure 2 As shown, the buffer tank 400 is provided with a second outlet 410. In the vertical direction, the second outlet 410 is higher than the first outlet 110, and the second inlet 220 is higher than the second outlet 410.

[0050] In this embodiment, the height of the second outlet 410 is set higher than that of the first outlet 110 in the vertical direction, and the height of the second inlet 220 is set higher than that of the second outlet 410. Thus, when the flow rate or pressure of the reaction liquid in the reaction chamber is normal, the reaction products can be introduced into the distillation chamber through the first pipe 300; when the flow rate of the reaction products entering the first pipe 300 changes, excess reaction products flow into the buffer tank 400, thereby stabilizing the flow rate of the reaction products entering the distillation chamber.

[0051] Optionally, such as Figure 1 and Figure 2 As shown, the distillation column 200 includes a column body 230 and a partition plate 240. The column body 230 is provided with a chamber 250. The partition plate 240 is disposed in the chamber 250 to divide the chamber 250 into two chambers, one of which is a heating chamber 251 and the other is a distillation chamber 252. The heating chamber 251 is located above the distillation chamber 252. The partition plate 240 allows the gas in the distillation chamber 252 to flow unidirectionally to the heating chamber 251. The heating chamber 251 is used to heat the reaction liquid and to supply the heated reaction liquid to the reaction chamber.

[0052] In this embodiment, the partition plate 240 divides the chamber 250 into a heating chamber 251 and a distillation chamber 252, with the heating chamber 251 positioned at the top. This allows the distillation gas in the distillation chamber 252 to heat the mother liquor, separating free ammonia from it. This not only makes full use of energy but also saves space and improves space utilization. In addition, the partition plate 240 allows gas from the distillation chamber 252 to be introduced into the heating chamber 251 and then discharged, while preventing the mother liquor from flowing into the distillation chamber 252, ensuring the smooth progress of the ammonia recovery process.

[0053] Optionally, such as Figure 1 and Figure 2 As shown, the tower body is provided with a third inlet 260, which is connected to the heating chamber 251 and is used to introduce the reaction liquid into the heating chamber 251.

[0054] In this embodiment of the application, the third inlet 260 is located on the side of the distillation column 200 near the top. The third inlet 260 is connected to the heating chamber 251, and the mother liquor can be introduced into the heating chamber 251 for heating through the third inlet 260.

[0055] Optionally, the recovery device also includes a second pipe 800, one end of which is connected to the reaction chamber and the other end of which is connected to the end of the heating chamber 251 near the partition plate 240. The second pipe 800 is used to introduce the reaction liquid in the heating chamber 251 into the reaction chamber.

[0056] In this embodiment, the mother liquor heated in the heating chamber 251 can be introduced into the reaction chamber through the second pipe 800 to mix with lime milk and thus undergo a chemical reaction.

[0057] Optional, such as Figure 1 and Figure 2 As shown, the recovery device also includes a third pipe 700, one end of which is connected to the reaction chamber and the other end of which is connected to the end of the heating chamber 251 near the partition plate 240, for introducing the gas in the reaction chamber into the heating chamber 251.

[0058] In this embodiment, the third pipe 700 can introduce the reaction gas in the reaction chamber into the heating chamber 251. The heat carried by the reaction gas itself can heat the mother liquor in the heating chamber 251, thereby improving the heat utilization rate.

[0059] Specifically, a third outlet 270 is provided at the top of the distillation column 200. The third outlet 270 is connected to the heating chamber 251, so that the heat generated by the heating of the mother liquor in the heating chamber 251, the free ammonia in the reaction liquid, and the gas introduced by the third pipe 700 can be discharged together through the third outlet 270.

[0060] Optional, such as Figure 1 and Figure 2 As shown, the buffer tank 400 is provided with a buffer chamber, which is used to buffer reaction products. The inner wall of the buffer chamber is provided with a heat insulation layer.

[0061] In this embodiment, the insulation layer in the buffer tank 400 can keep the reaction products buffered in the buffer tank 400 at a preset temperature, preventing the temperature of the reaction products entering the distillation chamber 252 from the buffer tank 400 from dropping, which would affect the heating and distillation process and thus the recovery of ammonia. The insulation layer can be made of insulating materials such as glass wool or rock wool. Of course, the material of the insulation layer can be selected according to actual conditions, and this embodiment does not impose any limitations on it.

[0062] Optionally, the recovery device also includes a stirring mechanism 600, which extends at least partially into the reaction chamber for stirring the reaction liquid.

[0063] In this embodiment, one end of the stirring mechanism 600 is fixed to the top of the reaction tank 100, and the other end is immersed in the mother liquor and lime slurry. The stirring mechanism 600 is electrically connected to a power source. The stirring mechanism 600 includes a rotating rod 610 and several impellers 620. The impellers 620 are sequentially fixed on the rotating rod 610 along its length. The length of the rotating rod 610 can be determined according to the height of the mixture of mother liquor and lime slurry, so that the stirring mechanism 600 can stir the mother liquor and lime slurry evenly, thereby ensuring sufficient contact between them and a more complete chemical reaction, thus improving the ammonia recovery effect.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0065] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A recycling device, characterized in that, include: Reaction tank, distillation column, first pipeline and buffer tank; The reaction tank has a reaction chamber, and the distillation column has a distillation chamber. The first pipe is located between the reaction tank and the distillation column. The first pipe has a first end and a second end, which are connected to the reaction chamber. The first end is connected to the distillation chamber, and the second end is connected to the distillation chamber. The first pipe is used to guide the reaction products in the reaction tank to the distillation chamber. One end of the buffer tank is connected to the first end, and the other end is connected to the distillation chamber. The buffer tank is used to buffer the reaction products.

2. The recycling device according to claim 1, characterized in that, It also includes a regulating valve, which is located on the side of the first pipe near the second end, for regulating the flow rate of the reaction product introduced into the distillation chamber through the first pipe.

3. The recycling device according to any one of claims 1-2, characterized in that, The reaction vessel is provided with a first outlet, and the distillation column is provided with a first inlet. The first end is connected to the first outlet, and the second end is connected to the first inlet. In the vertical direction, the first inlet is higher than the first outlet.

4. The recycling device according to claim 3, characterized in that, The distillation column is provided with a second inlet, and the buffer tank is connected to the second inlet. In the vertical direction, the second inlet is higher than the first outlet.

5. The recycling device according to claim 4, characterized in that, In the vertical direction, the second entrance is higher than the first entrance.

6. The recycling device according to claim 5, characterized in that, The buffer tank is provided with a second outlet, which is higher than the first outlet in the vertical direction, and the second inlet is higher than the second outlet.

7. The recycling device according to claim 1, characterized in that, The distillation column includes a column body and a partition plate. The column body has a chamber, and the partition plate is disposed in the chamber to divide the chamber into two chambers, one of which is a heating chamber and the other is the distillation chamber. The heating chamber is located above the distillation chamber. The partition plate allows gas in the distillation chamber to flow unidirectionally to the heating chamber. The heating chamber is used to heat the reaction liquid and to supply the heated reaction liquid to the reaction chamber.

8. The recycling device according to claim 7, characterized in that, The tower body is provided with a third inlet, which is connected to the heating chamber and is used to introduce the reaction liquid into the heating chamber. And / or, the recovery device further includes a second pipe, one end of which is connected to the reaction chamber and the other end of which is connected to the end of the heating chamber near the partition plate. The second pipe is used to introduce the reaction liquid in the heating chamber into the reaction chamber.

9. The recycling device according to claim 8, characterized in that, It also includes a third pipe, one end of which is connected to the reaction chamber and the other end of which is connected to the end of the heating chamber near the partition plate, for introducing the gas in the reaction chamber into the heating chamber.

10. The recycling device according to claim 7, characterized in that, The buffer tank is provided with a buffer cavity, which is used to buffer the reaction products. The inner wall of the buffer cavity is provided with a heat insulation layer. And / or, the recovery device further includes a stirring mechanism that extends at least partially into the reaction chamber for stirring the reaction liquid.

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