Liquid deacidification device

Abstract

The utility model relates to a liquid deacidification device which is characterized in that a first transfer tank is connected with a film evaporator, a second transfer tank is connected with the first transfer tank, the acid concentration of fluorinated liquid in the first transfer tank is monitored at any time, and one end of a feeding pipe is connected with the first transfer tank through a first circulating pipe; when the acid concentration of the fluorination liquid in the first transfer tank is qualified, feeding and discharging are carried out synchronously, the fluorination liquid with the acid concentration reaching the standard is discharged through the first discharging pipe, and the subsequently input fluorination liquid is subjected to acid removal through the film evaporator, passes through the first connecting pipe and the second connecting pipe, and then passes through the first circulating pipe and the second circulating pipe. The fluorination liquid flows into the first transfer tank, flows into the second transfer tank and then enters the feeding pipe again through the second circulating pipe, so that the fluorination liquid enters the first transfer tank after circulating deacidification and discharging are finished, and the acid concentration of the fluorination liquid is detected again. Therefore, the fluorination liquid can be continuously fed, the fluorination liquid is subjected to circulating deacidification, and the deacidification benefit is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technology of chemical industry acid removal equipment, especially relates to a liquid acid removal device. BACKGROUND

[0002] Fluorinated liquid is a kind of colorless, odorless, insulating and non-flammable organic solvent, has multiple excellent characteristics, such as low surface tension, low viscosity, high boiling point, low freezing point, good chemical inertness and electrical insulation etc.Fluorinated liquid may be contaminated by acidic substances in the production and use process, and the acidic impurities in fluorinated liquid can reduce the purity and quality of fluorinated liquid, and the acidic impurities may corrode the equipment in the use process of fluorinated liquid.Therefore, it is necessary to carry out acid removal treatment to fluorinated liquid, to ensure the purity and quality of fluorinated liquid, and to ensure the stability of fluorinated liquid in use process.

[0003] The principle of fluorinated liquid acid removal device is based on the boiling point difference between substances, that is, by heating fluorinated liquid, the acidic components in fluorinated liquid are evaporated, and the acidic components are condensed and treated, and the acid concentration of fluorinated liquid is detected, and the discharge is carried out after the acid concentration reaches the qualified standard, to realize the separation of acidic components and fluorinated liquid body, so as to reduce the acid concentration in fluorinated liquid.The existing fluorinated liquid acid removal device cannot open the discharge port at the same time when feeding, and needs to monitor the acid concentration of fluorinated liquid after suspending feeding, and discharges after passing, so that feeding and discharging cannot be carried out at the same time, reduces the acid removal efficiency, limits the acid removal amount of fluorinated liquid, and leads to low efficiency. UTILITY MODEL CONTENT

[0004] In view of the above problems, the present application provides a kind of liquid acid removal device, to solve the technical problems that existing liquid acid removal device cannot carry out feeding and discharging simultaneously, and acid removal efficiency is limited.

[0005] To achieve the above object, the first aspect of the present application provides a liquid acid removal device, comprising a feeding pipe, a thin film evaporator, a condenser, an acid receiving tank, a vacuum pump, a first transfer tank, a second transfer tank, a first nitrogen pipe, a first circulation pipe, a second circulation pipe, a first connecting pipe, a second connecting pipe, a first discharging pipe and a second discharging pipe, the feeding pipe is connected with the top of the thin film evaporator, the top of the condenser is connected with one side of the thin film evaporator, the outer side wall of the thin film evaporator is provided with a jacket, and the jacket is sequentially provided with a hot water inlet pipeline and a hot water outlet pipeline in sequence from top to bottom, the bottom of the condenser is connected with the acid receiving tank, the vacuum pump is connected with the acid receiving tank, the vacuum pump is provided with a vacuum tail gas pipe, the first nitrogen pipe is communicated with the vacuum pump, the first transfer tank is provided with a monitoring meter, the monitoring meter is used for monitoring the acidity of the material in the first transfer tank, the top of the first transfer tank is provided with a first connecting port and a second connecting port, the bottom of the first transfer tank is provided with a first discharging port, the bottom of the second transfer tank is provided with a second discharging port, the first connecting pipe is used for connecting the first connecting port and the thin film evaporator, the second connecting pipe is used for connecting the first connecting pipe and the second transfer tank, the first circulation pipe is used for connecting the second connecting port and the feeding pipe, the first connecting port is provided with a first control valve, the second connecting port is provided with a second control valve, the second connecting pipe is provided with a third control valve, the first discharging port is connected with the first discharging pipe, the second discharging port is connected with the second discharging pipe, the first discharging pipe is provided with a fourth control valve, the second discharging pipe is provided with a fifth control valve, one end of the second circulation pipe is connected with the feeding pipe, the other end of the second circulation pipe is connected with the second discharging pipe, and the second circulation pipe is provided with a sixth control valve.

[0006] As an embodiment of the present application, the first circulation pipe is provided with a first fluid pump, and the second discharging pipe is provided with a second fluid pump, and the second fluid pump is used for transmitting the liquid in the second discharging pipe to the second circulation pipe.

[0007] As an embodiment of the present application, the first circulation pipe is provided with a first fluid pump, and the second discharging pipe is provided with a second fluid pump, and the second fluid pump is used for transmitting the liquid in the second discharging pipe to the second circulation pipe.

[0008] As an embodiment of the present application, the first circulation pipe is provided with a first fluid pump, and the second discharging pipe is provided with a second fluid pump, and the second fluid pump is used for transmitting the liquid in the second discharging pipe to the second circulation pipe.

[0009] As an embodiment of the utility model, still include balance pipe, the top of first transfer tank is equipped with third connecting port, the top of second transfer tank is equipped with fourth connecting port, balance pipe is equipped with three ports, one port is used for docking vacuum pump, two ports are used for docking third connecting port and fourth connecting port respectively.

[0010] As an embodiment of the utility model, still include second nitrogen pipe, the top of first transfer tank is equipped with fifth connecting port, the top of second transfer tank is equipped with sixth connecting port, second nitrogen pipe is connected with fifth connecting port, sixth connecting port.

[0011] As an embodiment of the utility model, second nitrogen pipe includes second nitrogen main pipe, first branch pipe and second branch pipe, first branch pipe and second branch pipe are arranged in parallel on the downside of second nitrogen main pipe, first branch pipe is used for connecting fifth connecting port with second nitrogen main pipe, eighth control valve is equipped on first branch pipe, second branch pipe is used for connecting sixth connecting port with second nitrogen main pipe, ninth control valve is equipped on second branch pipe.

[0012] As an embodiment of the utility model, still include vacuum buffer tank, fifth connecting pipe and sixth connecting pipe, vacuum buffer tank is equipped with seventh connecting port, eighth connecting port and ninth connecting port, seventh connecting port is connected with acid receiving tank through fifth connecting pipe, eighth connecting port is connected with first nitrogen pipe, ninth connecting port is connected with vacuum pump through sixth connecting pipe, one end of sixth connecting pipe is equipped with tenth control valve, the other end of sixth connecting pipe is equipped with eleventh control valve.

[0013] As an embodiment of the utility model, first nitrogen pipe includes first nitrogen main pipe, third branch pipe and fourth branch pipe, third branch pipe and fourth branch pipe are arranged in parallel on the downside of first nitrogen main pipe, third branch pipe is used for connecting first nitrogen main pipe with fifth connecting pipe, twelfth control valve is equipped on third branch pipe, fourth branch pipe is used for connecting first nitrogen main pipe with eighth connecting port, thirteenth control valve is equipped on fourth branch pipe.

[0014] Distinguish from prior art, the technical scheme of the application is connected with the first transfer tank and the thin film evaporator, the second transfer tank is connected with the first transfer tank, the monitor is arranged on the first transfer tank, the acid concentration of the fluorination liquid in the first transfer tank is monitored at any time, one end of the feeding pipe is connected with the first transfer tank through the first circulating pipe, the other end of the feeding pipe is connected with the second transfer tank through the second circulating pipe, when the acid concentration of the fluorination liquid in the first transfer tank is qualified, the feeding and discharging are synchronously carried out, the first control valve is closed, the third control valve is opened, the fluorination liquid with the qualified acid concentration is discharged through the first discharging pipe, the subsequent input fluorination liquid is deacidified through the thin film evaporator, then flows into the second transfer tank through the first connecting pipe and the second connecting pipe, and then enters the feeding pipe again through the second circulating pipe, so that the fluorination liquid is circulated and deacidified, after the discharging is finished, the fluorination liquid enters the first transfer tank, and the acid concentration of the fluorination liquid is detected again.

[0015] The above-mentioned utility model content related record is only the summary of the technical scheme of the application, in order to let the ordinary skilled person in the art can more clearly understand the technical scheme of the application, then can be implemented according to the content of the description and the drawings, and in order to let the above-mentioned purpose of the application and other purposes, characteristics and advantages can be more easily understood, the following combining the specific embodiment of the application and the drawings are described. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings are only used to show the principle, implementation mode, application, characteristics and effect of the specific embodiment of the application and other related contents, and cannot be considered as the limitation of the application.

[0017] In the drawings of the specification:

[0018] Figure 1 The structure diagram of the liquid deacidification device of the application Figure One ;

[0019] Figure 2 The structure diagram of the liquid deacidification device of the application Figure Two ;

[0020] Figure 3 The structure diagram of the liquid deacidification device of the application Figure Three ;

[0021] Figure 4 The structure diagram of the liquid deacidification device of the application Figure Four ;

[0022] Figure 5 The structure diagram of the liquid deacidification device of the application Figure Five .

[0023] The reference signs involved in the above-mentioned figures are explained as follows:

[0024] 1. feed pipe,

[0025] 2. thin film evaporator, 201. hot water inlet pipe, 202. hot water outlet pipe, 203. third outlet,

[0026] 3. condenser,

[0027] 4. acid receiving tank,

[0028] 5. vacuum pump, 501. vacuum exhaust pipe,

[0029] 6. first transfer tank, 601. monitoring meter, 602. first connecting port, 6021. first control valve, 603. second connecting port, 6031. second control valve, 604. first outlet, 605. third connecting port, 606. fifth connecting port,

[0030] 7. second transfer tank, 701. second outlet, 702. fourth connecting port, 703. sixth connecting port,

[0031] 8. first nitrogen pipe, 801. first nitrogen main pipe, 802. third branch pipe, 8021. twelfth control valve, 803. fourth branch pipe, 8031. thirteenth control valve,

[0032] 9. first circulation pipe, 901. first fluid pump,

[0033] 10. second circulation pipe, 1001. sixth control valve,

[0034] 11. first connecting pipe,

[0035] 12. second connecting pipe, 1201. third control valve,

[0036] 13. first outlet pipe, 1301. fourth control valve, 1302. third fluid pump,

[0037] 14. second outlet pipe, 1401. fifth control valve, 1402. second fluid pump,

[0038] 15. third connecting pipe, 1501. seventh control valve,

[0039] 16. fourth connecting pipe,

[0040] 17. balance pipe,

[0041] 18. second nitrogen pipe, 1801. second nitrogen main pipe, 1802. first branch pipe, 18021. eighth control valve, 1803. second branch pipe, 18031. ninth control valve,

[0042] 19. vacuum buffer tank, 1901. seventh connection port, 1902. eighth connection port, 1903. ninth connection port,

[0043] 20. fifth connection pipe,

[0044] 21. sixth connection pipe, 2101. tenth control valve, 2102. eleventh control valve. DETAILED DESCRIPTION

[0045] In order to describe possible application scenarios, technical principles, specific implementation schemes, and purposes and effects of the present application in detail, the following will be described in detail in combination with specific embodiments and with reference to the drawings. The embodiments described herein are only used to more clearly illustrate the technical schemes of the present application, and therefore cannot be used to limit the protection scope of the present application.

[0046] In this document, the term "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical scheme.

[0047] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms in this document is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0048] In the description of the present application, the word "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, X and / or Y, which means that there are three cases: X exists, Y exists, and X and Y exist at the same time. In addition, the character " / " in this document generally represents that the associated objects before and after are a "or" logical relationship.

[0049] In the present application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary or order relationship between the entities or operations.

[0050] In the present application, the terms "comprise", "contain", "include", or other similar phrases used in the description means to encompass non-exclusive inclusion, and the terms do not exclude the presence of additional elements in the process, method or product comprising the stated elements, so that the process, method or product comprising a series of elements can not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0051] In the present application, the terms "greater than", "less than", "exceed" and the like are understood as not including the number itself; the terms "above", "below", "within" and the like are understood as including the number itself. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly specified.

[0052] In the description of the embodiments of the present application, the spatial-related terms used, such as "center", "lengthwise", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or the drawings, and are only used to facilitate the description of the specific embodiments of the present application or to facilitate the reader's understanding, and do not indicate or imply that the indicated device or component must have a particular position, a particular orientation, or be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0053] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", and the like should be understood broadly. For example, the "connection" can be a fixed connection, or a detachable connection, or an integral setting; it can be a mechanical connection, or an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] According to some embodiments of the present application, please refer to Figures 1 to 5The embodiment relates to a liquid acid removal device, which comprises a feeding pipe 1, a thin film evaporator 2, a condenser 3, an acid receiving tank 4, a vacuum pump 5, a first transfer tank 6, a second transfer tank 7, a first nitrogen pipe 8, a first circulation pipe 9, a second circulation pipe 10, a first connecting pipe 11, a second connecting pipe 12, a first discharging pipe 13 and a second discharging pipe 14, the feeding pipe 1 is connected with the top of the thin film evaporator 2, the top of the condenser 3 is connected with one side of the thin film evaporator 2, the outer side wall of the thin film evaporator 2 is provided with a jacket, the jacket is sequentially provided with a hot water inlet pipeline 201 and a hot water outlet pipeline 202 which are in communication with the jacket from top to bottom, the bottom of the condenser 3 is connected with the acid receiving tank 4, the vacuum pump 5 is connected with the acid receiving tank 4, the vacuum pump 5 is provided with a vacuum tail gas pipe 501, the first nitrogen pipe 8 is in communication with the vacuum pump 5, the first transfer tank 6 is provided with a monitoring meter 601, the monitoring meter 601 is used for monitoring the acidity of materials in the first transfer tank 6, the top of the first transfer tank 6 is provided with a first connecting port 602 and a second connecting port 603, the bottom of the first transfer tank 6 is provided with a first discharging port 604, the bottom of the second transfer tank 7 is provided with a second discharging port 701, the first connecting pipe 11 is used for connecting the first connecting port 602 and the thin film evaporator 2, the second connecting pipe 12 is used for connecting the first connecting pipe 11 and the second transfer tank 7, the first circulation pipe 9 is used for connecting the second connecting port 603 and the feeding pipe 1, the first connecting port 602 is provided with a first control valve 6021, the second connecting port 603 is provided with a second control valve 6031, the second connecting pipe 12 is provided with a third control valve 1201, the first discharging port is connected with the first discharging pipe 13, the second discharging port 701 is connected with the second discharging pipe 14, the first discharging pipe 13 is provided with a fourth control valve 1301, the second discharging pipe 14 is provided with a fifth control valve 1401, one end of the second circulation pipe 10 is connected with the feeding pipe 1, the other end of the second circulation pipe 10 is connected with the second discharging pipe 14, and the second circulation pipe 10 is provided with a sixth control valve 1001.

[0055] Differing from the prior art, the technical scheme of the application is characterized in that the first transfer tank 6 is connected with the thin film evaporator 2, the second transfer tank 7 is connected with the first transfer tank 6, a monitor is arranged on the first transfer tank 6 to monitor the acid concentration of the fluorination liquid in the first transfer tank 6 at any time, one end of the feeding pipe 1 is connected with the first transfer tank 6 through the first circulating pipe 9, the other end of the feeding pipe 1 is connected with the second transfer tank 7 through the second circulating pipe 10, when the acid concentration of the fluorination liquid in the first transfer tank 6 is qualified, the feeding and discharging are simultaneously performed, the first control valve 6021 is closed, the third control valve 1201 is opened, the fluorination liquid with the qualified acid concentration is discharged through the first discharging pipe 13, the subsequent input fluorination liquid is deacidified through the thin film evaporator 2, then flows into the second transfer tank 7 through the first connecting pipe 11 and the second connecting pipe 12, and then enters the feeding pipe 1 again through the second circulating pipe 10, so that the fluorination liquid is circulated and deacidified, after the discharging is completed, the fluorination liquid enters the first transfer tank 6, and the acid concentration of the fluorination liquid is detected again. Therefore, the fluorination liquid can be continuously fed, the fluorination liquid is circulated and deacidified, and the deacidification efficiency is improved.

[0056] According to some embodiments of the application, optionally, the first circulating pipe 9 is provided with a first fluid pump 901, and the second discharging pipe 14 is provided with a second fluid pump 1402, and the second fluid pump 1402 is used to transmit the liquid in the second discharging pipe 14 to the second circulating pipe 10.

[0057] Therefore, when the monitor 601 detects that the acidity of the fluorination liquid in the first transfer tank 6 is too high and does not meet the product standard, the second control valve 6031 on the first transfer tank 6 is opened, the fluorination liquid is driven by the first fluid pump 901, enters the first circulating pipe 9 through the second connecting port 603, and is upwardly conveyed to the feeding pipe 1, so that the fluorination liquid with the acidity higher than the standard concentration is circulated and deacidified. When the fluorination liquid in the first transfer tank 6 meets the standard, the second control valve 6031 and the sixth control valve 1001 are opened, and the first control valve 6021 is closed, the fluorination liquid is discharged through the first discharging pipe 13, the subsequent fluorination liquid is deacidified in the thin film evaporator 2, then flows into the second transfer tank 7 through the first connecting pipe 11 and the second connecting pipe 12, flows into the second circulating pipe 10 under the driving of the second fluid pump 1402, and is upwardly conveyed to the feeding pipe 1, so that the feeding is continuously performed for the circulation and deacidification when the discharging is performed in the first transfer tank 6.

[0058] According to some embodiments of the application, optionally, the third connecting pipe 15 is further included, the third connecting pipe 15 is used to connect the first discharging pipe 13 and the second circulating pipe 10, the third connecting pipe 15 is provided with a seventh control valve 1501, and the first discharging pipe 13 is provided with a third fluid pump 1302, and the third fluid pump 1302 is used to transmit the liquid in the first discharging pipe 13 to the third connecting pipe 15.

[0059] Thus, when the acidity of the fluorinated liquid in the first transfer tank 6 is too high and does not meet the standard, the fourth control valve 1301 is closed and the seventh control valve 1501 is opened, and the fluorinated liquid flows to the sixth connecting pipe 21 through the first discharge pipe 13 under the drive of the third fluid pump 1302, and is transported upward to the feed pipe 1 and then enters the thin film evaporator 2 again to remove the acid and improve the acid removal efficiency.

[0060] According to some embodiments of the present application, the fourth connecting pipe 16 is further included, and the top of the thin film evaporator 2 is provided with a third discharge port 203, and the third discharge port 203 is connected to the condenser 3 through the fourth connecting pipe 16.

[0061] Thus, the fluorinated liquid enters the thin film evaporator 2 through the feed pipe 1 for heating, and the acid impurities contained in the fluorinated liquid are evaporated and float on the top of the thin film evaporator 2, the fifth control valve 1401 is opened, and the fluorinated liquid flows into the fourth connecting pipe 16 through the third discharge port 203 and is liquefied by condensation in the condenser 3.

[0062] According to some embodiments of the present application, the balance pipe 17 is further included, the top of the first transfer tank 6 is provided with a third connecting port 605, the top of the second transfer tank 7 is provided with a fourth connecting port 702, and the balance pipe 17 is provided with three ports, one of which is used to connect to the vacuum pump 5, and the other two are used to connect to the third connecting port 605 and the fourth connecting port 702 respectively.

[0063] Thus, the balance pipe 17 connects the receiving tanks in the upper and lower parts of the entire device together, so that the vacuum pressures of the vacuum pump 5, the first transfer tank 6 and the second transfer tank 7 are consistent, ensuring stable operation of the system and improving the safety and stability of the equipment.

[0064] According to some embodiments of the present application, the second nitrogen pipe 18 is further included, the top of the first transfer tank 6 is provided with a fifth connecting port 606, the top of the second transfer tank 7 is provided with a sixth connecting port 703, and the second nitrogen pipe 18 is connected to the fifth connecting port 606 and the sixth connecting port 703.

[0065] According to some embodiments of the present application, the second nitrogen pipe 18 includes a second nitrogen main pipe 1801, a first branch pipe 1802 and a second branch pipe 1803, the first branch pipe 1802 and the second branch pipe 1803 are arranged in parallel on the lower side of the second nitrogen main pipe 1801, the first branch pipe 1802 is used to connect the fifth connecting port 606 and the second nitrogen main pipe 1801, and the eighth control valve 18021 is arranged on the first branch pipe 1802, the second branch pipe 1803 is used to connect the sixth connecting port 703 and the second nitrogen main pipe 1801, and the ninth control valve 18031 is arranged on the second branch pipe 1803.

[0066] Thus, the nitrogen gas in the second nitrogen gas pipe 18 enters the first transfer tank 6 through the first branch pipe 1802 from the fifth connection port 606, and enters the second transfer tank 7 through the second branch pipe 1803 from the sixth connection port 703, effectively expelling the oxygen gas in the tank, creating an oxygen-free, dry environment for the first transfer tank 6 and the second transfer tank 7, reducing the possibility of corrosion of the fluorinated liquid.

[0067] According to some embodiments of the present application, optionally, a vacuum buffer tank 19, a fifth connection pipe 20 and a sixth connection pipe 21 are further included, the vacuum buffer tank 19 is provided with a seventh connection port 1901, an eighth connection port 1902 and a ninth connection port 1903, the seventh connection port 1901 is connected with the acid receiving tank 4 through the fifth connection pipe 20, the eighth connection port 1902 is connected with the first nitrogen gas pipe 8, and the ninth connection port 1903 is connected with the vacuum pump 5 through the sixth connection pipe 21, one end of the sixth connection pipe 21 is provided with a tenth control valve 2101, and the other end of the sixth connection pipe 21 is provided with an eleventh control valve 2102.

[0068] Thus, when the vacuum pump 5 is running, the gas in the device is extracted, and the pressure in the container will decrease rapidly. The presence of the vacuum buffer tank 19 can play a buffering role, so that the gas pressure and temperature entering the vacuum pump 5 are more stable, preventing damage to the vacuum pump 5 due to sudden pressure changes.

[0069] According to some embodiments of the present application, optionally, the first nitrogen gas pipe 8 includes a first nitrogen gas main pipe 801, a third branch pipe 802 and a fourth branch pipe 803, the third branch pipe 802 and the fourth branch pipe 803 are arranged in parallel on the lower side of the first nitrogen gas main pipe 801, the third branch pipe 802 is used to connect the first nitrogen gas main pipe 801 with the fifth connection pipe 20, the third branch pipe 802 is provided with a twelfth control valve 8021, and the fourth branch pipe 803 is used to connect the first nitrogen gas main pipe 801 with the eighth connection port 1902, the fourth branch pipe 803 is provided with a thirteenth control valve 8031.

[0070] Thus, the nitrogen gas in the first nitrogen gas main pipe 801 enters the fourth connection pipe 16 through the third branch pipe 802, and then enters the system, pressing the acidic material into the acid receiving tank 4 through the pipeline, while the nitrogen gas enters the vacuum buffer tank 19 through the fourth branch pipe 803, effectively expelling the oxygen gas in the tank.

[0071] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, the combination of features of different embodiments means within the scope of the present application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A liquid acid removal device, characterized by, The device comprises a feeding pipe, a thin film evaporator, a condenser, an acid receiving tank, a vacuum pump, a first transfer tank, a second transfer tank, a first nitrogen pipe, a first circulation pipe, a second circulation pipe, a first connecting pipe, a second connecting pipe, a first discharging pipe and a second discharging pipe. The feeding pipe is connected to the top of the thin film evaporator. The top of the condenser is connected to one side of the thin film evaporator. The outer wall of the thin film evaporator is provided with a jacket, which is sequentially provided with a hot water inlet pipe and a hot water outlet pipe from top to bottom. The bottom of the condenser is connected to the acid receiving tank. The vacuum pump is connected to the acid receiving tank. The vacuum pump is provided with a vacuum exhaust pipe. The first nitrogen pipe is connected to the vacuum pump. The first transfer tank is provided with a monitoring meter for monitoring the acidity of the material in the first transfer tank. The top of the first transfer tank is provided with a first connecting port and a second connecting port. The bottom of the first transfer tank is provided with a first discharging port. The bottom of the second transfer tank is provided with a second discharging port. The first connecting pipe is used to connect the first connecting port and the thin film evaporator. The second connecting pipe is used to connect the first connecting pipe and the second transfer tank. The first circulation pipe is used to connect the second connecting port and the feeding pipe. The first connecting port is provided with a first control valve. The second connecting port is provided with a second control valve. The second connecting pipe is provided with a third control valve. The first discharging port is connected to the first discharging pipe. The second discharging port is connected to the second discharging pipe. The first discharging pipe is provided with a fourth control valve. The second discharging pipe is provided with a fifth control valve. One end of the second circulation pipe is connected to the feeding pipe. The other end of the second circulation pipe is connected to the second discharging pipe. The second circulation pipe is provided with a sixth control valve.

2. The liquid acid removal device of claim 1, wherein, The first circulation pipe is provided with a first fluid pump. The second discharging pipe is provided with a second fluid pump, which is used to transport the liquid in the second discharging pipe to the second circulation pipe.

3. The liquid acid removal device of claim 2, wherein, The device further comprises a third connecting pipe, which is used to connect the first discharging pipe and the second circulation pipe. The third connecting pipe is provided with a seventh control valve. The first discharging pipe is provided with a third fluid pump, which is used to transport the liquid in the first discharging pipe to the third connecting pipe.

4. The liquid acid removal device of claim 1, wherein, The device further comprises a fourth connecting pipe. The top of the thin film evaporator is provided with a third discharging port. The third discharging port is connected to the condenser through the fourth connecting pipe.

5. The liquid acid removal device of claim 1, wherein, The device further comprises a balance pipe. The top of the first transfer tank is provided with a third connecting port. The top of the second transfer tank is provided with a fourth connecting port. The balance pipe is provided with three ports. One port is used to connect the vacuum pump. Two ports are used to connect the third connecting port and the fourth connecting port, respectively.

6. The liquid acid removal device of claim 1, wherein, The device further comprises a second nitrogen pipe. The top of the first transfer tank is provided with a fifth connecting port. The top of the second transfer tank is provided with a sixth connecting port. The second nitrogen pipe is connected to the fifth connecting port and the sixth connecting port.

7. The liquid acid removal device of claim 6, wherein, The second nitrogen pipe comprises a second nitrogen main pipe, a first branch pipe and a second branch pipe, the first branch pipe and the second branch pipe are arranged in parallel on the lower side of the second nitrogen main pipe, the first branch pipe is used for connecting the fifth connecting port and the second nitrogen main pipe, the first branch pipe is provided with an eighth control valve, the second branch pipe is used for connecting the sixth connecting port and the second nitrogen main pipe, and the second branch pipe is provided with a ninth control valve.

8. The liquid acid removal device of claim 1, wherein, The vacuum buffer tank, the fifth connecting pipe and the sixth connecting pipe are further included, the vacuum buffer tank is provided with a seventh connecting port, an eighth connecting port and a ninth connecting port, the seventh connecting port is connected with the acid receiving tank through the fifth connecting pipe, the eighth connecting port is connected with the first nitrogen pipe, the ninth connecting port is connected with the vacuum pump through the sixth connecting pipe, one end of the sixth connecting pipe is provided with a tenth control valve, and the other end of the sixth connecting pipe is provided with an eleventh control valve.

9. The liquid acid removal device of claim 8, wherein, The first nitrogen pipe comprises a first nitrogen main pipe, a third branch pipe and a fourth branch pipe, the third branch pipe and the fourth branch pipe are arranged in parallel on the lower side of the first nitrogen main pipe, the third branch pipe is used for connecting the first nitrogen main pipe and the fifth connecting pipe, the third branch pipe is provided with a twelfth control valve, the fourth branch pipe is used for connecting the first nitrogen main pipe and the eighth connecting port, and the fourth branch pipe is provided with a thirteenth control valve.

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