A preparation system for preparing MOFs materials
By setting up baffles and blowers in the MOFs material preparation system to achieve uniform hot air distribution, and combining them with exhaust gas treatment devices and micro negative pressure devices, the problems of uneven reaction and serious pollution were solved, thus realizing the uniform preparation and environmentally friendly treatment of MOFs materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI MARITIME UNIVERSITY
- Filing Date
- 2023-04-27
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies for preparing MOF materials suffer from problems such as uneven reaction and severe contamination, especially the hydrothermal synthesis method carried out under high temperature and high pressure conditions.
By setting up baffles and blowers to achieve uniform distribution of hot air, combined with exhaust gas treatment devices including exhaust gas desulfurization, acidification absorption and activated carbon adsorption, pollutant emissions are reduced, and a micro negative pressure device ensures the smooth progress of the reaction process.
This method achieves uniform heat distribution and effective treatment of pollutants during the preparation of MOF materials, ensuring the uniformity and environmental friendliness of the reaction.
Smart Images
Figure CN116459753B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of MOF material preparation technology, and in particular to a preparation system for preparing MOF materials. Background Technology
[0002] MOFs, or metal-organic frameworks, are a class of organic-inorganic hybrid materials with a wireless network structure formed by the self-assembly of metals and ligands through coordination bonds. Due to their extremely high specific surface area, porosity, and tunable pore size / function, they have broad application prospects in gas storage, adsorption separation, carbon dioxide capture technology, gas membrane separation, photocatalysis, electrocatalysis, sensors, optics, and biomedical engineering. Especially against the backdrop of my country's dual carbon goals of reaching carbon peak by 2030 and carbon neutrality by 2060, and the "Medium- and Long-Term Plan for the Development of the Hydrogen Energy Industry (2021-2035)," MOF porous adsorption materials are expected to play a crucial role in hydrogen storage and transportation, CO2 capture, and zero-carbon chemical / power / construction industries.
[0003] Hydrothermal synthesis is a relatively traditional method for synthesizing MOF materials and is commonly used in laboratory synthesis. This method involves placing a mixed solution of metal salt and organic linker in a sealed container, then subjecting the reactor to high temperature and pressure to promote the growth of insoluble frameworks. These frameworks precipitate as crystals, and after washing and drying, the crystalline metal-organic framework material is obtained. The disadvantages of this method are that it requires high temperature and pressure, is time-consuming, and generates pollution.
[0004] Utility model patent CN 216977345 U discloses an electrically heated constant-temperature forced-air drying oven, including a chamber, a filter device, and an inert gas tank. The chamber has an air inlet and an air outlet, and a fan is installed inside the chamber. An electric heating wire is installed at the air outlet of the fan. The filter device is located at the air inlet to filter the air entering the chamber. By installing a filter device at the air inlet of the chamber, impurities in the air entering the chamber are removed, making it particularly suitable for samples with strict quality requirements. The outlet of the inert gas tank is connected to the air inlet, and the return port of the inert gas tank is connected to the air outlet. Inert gas circulates within the inert gas tank and the chamber, preventing the samples inside the chamber from reacting with oxygen in the air at high temperatures, making it particularly suitable for samples that are easily oxidized at high temperatures. However, this drying oven has a single heating point, resulting in uneven heat distribution and an inability to achieve uniform reaction.
[0005] A utility model patent with authorization announcement number CN 216716820 U describes a constant-temperature energy-saving electric heating drying oven, comprising a left chamber and a right chamber. A control console is mounted on the left chamber, and a drying chamber is located within the right chamber. Several storage nets are spaced apart within the drying chamber. A circulation chamber connects the drying chamber and the right chamber. The drying chamber contains a temperature detection mechanism and a heating mechanism, which includes a blower and an electric heating wire. The blower is located at the bottom of the drying chamber, with its inlet inside the circulation chamber and its outlet inside the drying chamber. The electric heating wire is located inside the drying chamber, near the blower's outlet. Several airflow holes are located at the top of the drying chamber, connecting it to the circulation chamber. However, this drying oven does not treat the exhaust gas, causing pollution.
[0006] In summary, there is an urgent need to develop a preparation device for MOF materials that produces uniform and pollution-free reactions. Summary of the Invention
[0007] The purpose of this invention is to overcome the shortcomings of the prior art by providing a preparation system for MOF materials. This system achieves uniform reaction by setting up a baffle plate and a blower, reduces pollution by adding an exhaust gas treatment device, and ensures a stable material preparation reaction process by adding a shock absorption mechanism.
[0008] The objective of this invention can be achieved through the following technical solutions:
[0009] The purpose of this invention is to provide a preparation system for MOF materials. The MOF material preparation system includes: a material preparation apparatus; a tail gas treatment device connected to the outlet of the material preparation apparatus via a first connecting pipe to absorb and treat different toxic and harmful gases generated during the preparation reaction; an inert gas tank connected to the inlet of the material preparation apparatus via a second connecting pipe; a micro negative pressure device to smoothly discharge the tail gas generated during the reaction; a tail gas detection device to measure and analyze the components in the tail gas; and a PLC control unit to enable signal feedback adjustment of each device in the system.
[0010] Furthermore, the material preparation device also includes a heating mechanism, a blower, a baffle plate, partitions, a shock absorption mechanism, a support frame, a reaction vessel, and a temperature sensor; the heating mechanism is located inside the material preparation device housing and on both sides of the housing; the blower is respectively located at the four corners of both sides inside the material preparation device housing to force airflow into the material preparation device, ensuring uniform circulation of hot air within the device; the baffle plates are U-shaped and symmetrically arranged inside the housing, forming symmetrical air inlets; the partitions are respectively arranged on the six sides inside the housing, and the partitions and baffles... Gaps are left between the plates, and multiple equidistant ventilation holes are provided on the partition plates; the shock absorption mechanism is installed on the partition plates, and the shock absorption mechanism includes springs. The shock absorption mechanism, under the action of the elastic potential energy of the springs, buffers the reaction vessel body on the support frame to minimize the shaking of the reaction vessel body during use; the support frame is installed on the shock absorption mechanism; the reaction vessel is placed on the support frame and is used for the preparation reaction of MOFs materials. The preparation reaction of MOFs materials is carried out in the reaction vessel; the temperature sensor is installed inside the material preparation device to sense the internal temperature changes of the material preparation device and feed the temperature signal back to the PLC control unit.
[0011] Furthermore, by setting up baffles to prevent hot air from blowing directly onto the reactor, the flow rate of the hot air can be reduced. In conjunction with the operation of the blower, the hot air is eventually blown onto the reactor through the ventilation holes on the baffle, thus achieving a lower flow rate of hot air. This ensures that the heat in the material preparation device is evenly distributed, thereby achieving uniform drying.
[0012] Furthermore, the exhaust gas treatment device includes: an exhaust gas desulfurization mechanism; an exhaust gas acidification absorption mechanism connected to the outlet of the material preparation device; and an activated carbon adsorption-desorption exhaust gas purification mechanism; the exhaust gas desulfurization mechanism, the activated carbon adsorption-desorption exhaust gas purification mechanism, and the exhaust gas acidification absorption mechanism are coupled together to achieve exhaust gas treatment.
[0013] Furthermore, when sulfides such as SO2 are generated during the MOFs material preparation reaction, the exhaust gas is discharged into an exhaust gas desulfurization unit to absorb and treat the sulfides such as SO2 in the exhaust gas; when exhaust gas that is easily soluble in acid absorbent, alkali absorbent, and water is generated during the MOFs material preparation reaction, the exhaust gas is discharged into an exhaust gas acidification absorption unit to absorb and treat the exhaust gas that is easily soluble in acid absorbent, alkali absorbent, and water; when exhaust gas containing organic compounds such as benzene, alcohols, ketones, esters, and gasoline is generated during the MOFs material preparation reaction, the exhaust gas is discharged into an activated carbon adsorption-desorption exhaust gas purification unit to absorb and treat the exhaust gas containing organic compounds such as benzene, alcohols, ketones, esters, and gasoline. Furthermore, the exhaust gas desulfurization mechanism includes: a desulfurization cylinder and a desulfurization liquid storage tank; the desulfurization cylinder is connected to the outlet of the material preparation device, the desulfurization cylinder is equipped with a desulfurization spray assembly, and the bottom of the desulfurization cylinder is equipped with a desulfurization liquid recovery tank; the desulfurization liquid storage tank is connected to the desulfurization spray assembly to provide desulfurization liquid for the desulfurization process.
[0014] Furthermore, the tail gas acidification and absorption mechanism includes: a water washing component, an acid washing component, an alkaline washing component, and a second connecting pipe; the water washing component is equipped with a water spray element, and a dilute acid recovery tank is provided at the bottom of the water washing component; the gas inlet of the water washing component is connected to the acid washing component, and the gas outlet of the water washing component is connected to the alkaline washing component; the acid washing component is equipped with an acid spray element, and a concentrated acid recovery tank is provided at the bottom of the acid washing component; the gas outlet of the acid washing component is connected to the water washing component, and the acid spray element is connected to a concentrated sulfuric acid storage tank; the alkaline washing component is equipped with an alkaline spray element, and a tail liquid recovery tank is provided at the bottom of the alkaline washing component; the gas inlet of the alkaline washing component is connected to the water washing component, and the alkaline spray element is connected to an alkaline liquid storage tank; the second connecting pipe connects the gas outlet and gas inlet of the water washing component, the acid washing component, and the alkaline washing component.
[0015] Further, the activated carbon adsorption-desorption exhaust gas purification mechanism includes: an exhaust gas filter assembly, an exhaust gas adsorption-desorption assembly, a first connecting pipe, a blower motor, and a carbon monoxide gas tank; the exhaust gas filter assembly is connected to the outlet of the material preparation device, and the exhaust gas filter assembly contains a filter element, which is used to filter impurities in the exhaust gas generated during the material preparation process; the exhaust gas adsorption-desorption assembly is connected to the outlet of the exhaust gas filter assembly, and the exhaust gas adsorption-desorption assembly contains an activated carbon adsorption plate, with a fixing ring outside the activated carbon adsorption plate, through which the activated carbon adsorption plate is installed, and the tank of the exhaust gas adsorption-desorption assembly is connected through the fixing ring, which is used to adsorb and desorb the exhaust gas; the first connecting pipe connects the outlet of the exhaust gas filter assembly to the inlet of the exhaust gas adsorption-desorption assembly; the blower motor is disposed inside the first connecting pipe; the carbon monoxide gas tank is connected to the first connecting pipe between the exhaust gas filter assembly and the blower motor, and the carbon monoxide gas tank is used to provide carbon monoxide gas catalysis for the desorption process.
[0016] Furthermore, the exhaust gas filtration assembly can filter the exhaust gas, and the exhaust gas adsorption-desorption assembly can adsorb the exhaust gas. The continuous arrangement of the exhaust gas filtration assembly and the exhaust gas adsorption-desorption assembly can simultaneously complete the filtration and adsorption of exhaust gas, resulting in high exhaust gas treatment efficiency. After the activated carbon adsorbs the exhaust gas to a certain concentration or for a certain period of time, the electric control valve is closed, and the gas is connected to a high-temperature carbon monoxide gas tank through the valve for carbon monoxide gas catalysis. In conjunction with the blower motor, the activated carbon can be desorbed, and the desorbed gas is discharged from the outlet of the exhaust gas adsorption-desorption assembly.
[0017] Furthermore, the suction port of the micro negative pressure device is connected to the exhaust port of the exhaust gas treatment device, and the exhaust port of the micro negative pressure device is connected to the exhaust gas detection device; the suction port of the micro negative pressure device can continuously form a vacuum or negative pressure, and the exhaust port of the micro negative pressure device forms a slight positive pressure, so as to smoothly remove the exhaust gas generated during the reaction process.
[0018] Furthermore, the miniature negative pressure device includes: an air collection chamber, a negative pressure sensor, and a negative pressure motor; the negative pressure sensor is installed in the air collection chamber of the miniature negative pressure device to monitor the internal pressure of the miniature negative pressure device in real time and feed back an electrical signal to the PLC control unit. By detecting the negative pressure, the speed of the negative pressure motor is adjusted to the set pressure range; the negative pressure motor discharges air to reduce the air pressure in the material preparation device and the exhaust gas treatment device, making the gas in the material preparation device and the exhaust gas treatment device rarefied and forming a negative pressure zone.
[0019] Furthermore, the negative pressure sensor monitors the internal pressure of the miniature negative pressure device in real time and feeds back an electrical signal to the PLC control unit. By detecting the negative pressure, the speed of the negative pressure motor is adjusted to reach the set pressure range.
[0020] Furthermore, the exhaust gas, after being treated by the exhaust gas desulfurization unit, the exhaust gas acidification absorption unit, and the activated carbon adsorption desorption exhaust gas purification unit, enters the exhaust gas detection device through a micro negative pressure device. If the components in the exhaust gas meet the exhaust gas emission standards, it is discharged into the atmosphere through a pipeline. If the components in the exhaust gas still do not meet the exhaust gas emission standards, the pressure range set by the system is appropriately reduced to decrease the speed of the negative pressure motor, slowing down the exhaust gas treatment process and allowing for more thorough exhaust gas absorption. Simultaneously, based on the exhaust gas component analysis provided by the exhaust gas detection device, the exhaust gas is passed back into the exhaust gas desulfurization unit, the exhaust gas acidification absorption unit, or the activated carbon adsorption desorption exhaust gas purification unit for further treatment. The treated exhaust gas then enters the exhaust gas detection device again through the micro negative pressure device. This process is repeated until the components in the exhaust gas meet the exhaust gas emission standards, at which point it is discharged into the atmosphere through a pipeline.
[0021] Furthermore, for MOF materials with strict quality requirements, inert gas is introduced into the material preparation device to circulate the inert gas tank and the material preparation device, thus preventing the sample inside the material preparation device from reacting with oxygen in the air at high temperatures. This is especially suitable for samples that are easily oxidized at high temperatures.
[0022] Furthermore, the exhaust gas treatment device is connected to the outlet of the material preparation device via a first connecting pipe.
[0023] Furthermore, the inert gas tank is connected to the air inlet of the material preparation device via a second connecting pipe.
[0024] Furthermore, the exhaust gas detection device utilizes non-dispersive infrared and electrochemical sensors to measure and analyze the components in the exhaust gas.
[0025] Furthermore, the preparation system for preparing MOFs materials also includes a temperature sensor and a negative pressure sensor; the temperature sensor is located inside the material preparation device; and the negative pressure sensor is located inside a miniature negative pressure device.
[0026] Furthermore, the PLC control unit is connected to the material preparation device, the exhaust gas treatment device, the micro negative pressure device, the exhaust gas detection device, the temperature sensor, and the negative pressure sensor to realize timely signal feedback and control adjustment.
[0027] Furthermore, the PLC control unit is communicatively connected to the material preparation device, the exhaust gas treatment device, the micro negative pressure device, the exhaust gas detection device, the temperature sensor, and the negative pressure sensor.
[0028] Furthermore, the communication connection includes a wired or wireless connection.
[0029] Furthermore, the workflow of the above-mentioned preparation system for MOF materials is as follows:
[0030] S1. When the prepared MOFs material has strict quality requirements, such as materials that are easily oxidized at high temperatures, open the valve to circulate the inert gas in the inert gas tank with the air in the material preparation device through the second connecting pipe. This prevents the sample in the material preparation device from reacting with oxygen in the air at high temperatures. When the prepared MOFs material does not have strict quality requirements, turn the valve to circulate the outside air with the air in the material preparation device through the second connecting pipe.
[0031] S2. Set the temperature required for the MOFs material preparation reaction. The temperature sensor feeds back the temperature signal to the PLC control unit. The PLC control unit controls the heating mechanism and blower to start. The heating mechanism heats the inside of the material preparation device. The blower runs and the hot air is reduced in flow rate by the baffle plate and blown into the reaction vessel through the ventilation holes on the partition, so that the heat inside the material preparation device is evenly distributed and the internal temperature reaches the set material reaction temperature. The MOFs material completes the preparation reaction in the reaction vessel.
[0032] The toxic and harmful gases generated during the reaction of S3 and MOFs materials enter the tail gas treatment device through the first connecting pipe. When the tail gas contains sulfides such as SO2, it is fed into the tail gas desulfurization unit through the first connecting pipe to desulfurize the tail gas and absorb the sulfides such as SO2. When the tail gas contains gases that are easily soluble in acid absorbent, alkali absorbent, and water, it is fed into the tail gas acidification and absorption unit through the first connecting pipe to perform acid washing, water washing, and alkali washing on the tail gas, absorbing and treating the gases that are easily soluble in acid absorbent, alkali absorbent, and water. When the exhaust gas contains organic compounds such as benzene, alcohols, ketones, esters, and gasoline, it is fed into the activated carbon adsorption-desorption exhaust gas purification mechanism through the first connecting pipe. In this system, the exhaust gas is filtered in the exhaust gas filter assembly. The filtered exhaust gas then enters the exhaust gas adsorption-desorption assembly through the first connecting pipe to complete the adsorption of the exhaust gas. After the activated carbon adsorbs the exhaust gas to a certain concentration or for a certain period of time, the electric control valve is closed, and high-temperature carbon monoxide gas is introduced through the valve to catalyze the process. In conjunction with the blower motor, the activated carbon desorption process is completed. The desorbed gas is discharged from the outlet. The organic compounds such as benzene, alcohols, ketones, esters, and gasoline in the exhaust gas have been absorbed and treated.
[0033] S4. The exhaust gas, after being treated by the exhaust gas desulfurization mechanism, the exhaust gas acidification and absorption mechanism, and the activated carbon adsorption and desorption exhaust gas purification mechanism, is smoothly discharged through the micro negative pressure device. The negative pressure motor in the micro negative pressure device discharges air to reduce the air pressure in the material preparation device and the exhaust gas treatment device. The gas in the material preparation device and the exhaust gas treatment device becomes rarefied, forming a negative pressure zone. The negative pressure sensor monitors the internal pressure of the micro negative pressure device in real time and feeds back an electrical signal to the PLC control unit. By detecting the negative pressure, the speed of the negative pressure motor is adjusted to reach the set pressure range.
[0034] S5. After the exhaust gas is discharged through the micro negative pressure device, it enters the exhaust gas detection device. If the components in the exhaust gas meet the exhaust gas emission standards, it is discharged into the atmosphere through the pipeline. If the components in the exhaust gas still do not meet the exhaust gas emission standards, the pressure range set by the system is appropriately reduced to reduce the speed of the negative pressure motor, slow down the exhaust gas treatment process, and make the exhaust gas absorption more complete. At the same time, according to the exhaust gas component analysis given by the exhaust gas detection device, the exhaust gas is passed through the pipeline again into the exhaust gas desulfurization mechanism, the exhaust gas acidification absorption mechanism, or the activated carbon adsorption desorption exhaust gas purification mechanism for treatment. The treated exhaust gas enters the exhaust gas detection device again through the micro negative pressure device. This process is repeated until the components in the exhaust gas meet the exhaust gas emission standards and are discharged into the atmosphere through the pipeline.
[0035] Compared with the prior art, the present invention has the following beneficial effects:
[0036] 1) The preparation system for preparing MOFs materials provided by the present invention avoids hot air blowing directly onto the reaction vessel by setting up a baffle and a blower, and at the same time reduces the flow rate of hot air. Finally, the hot air is blown onto the reaction vessel through the ventilation holes on the baffle, so that the hot air flows out at a lower flow rate, so that the heat in the preparation device is evenly distributed, thereby achieving uniform reaction.
[0037] 2) The preparation system for preparing MOFs materials provided by the present invention adds an exhaust gas treatment device. As needed, different toxic and harmful gases generated during the preparation reaction of different MOFs materials are selectively absorbed and treated by an exhaust gas desulfurization device, an exhaust gas acidification absorption device, and an activated carbon adsorption desorption exhaust gas purification device, thereby reducing pollution.
[0038] 3) The preparation system for preparing MOFs materials provided by this invention adds a damping mechanism to ensure that the material preparation reaction process proceeds smoothly.
[0039] 4) The preparation system for preparing MOFs materials provided by this invention can achieve the purpose of uniform reaction and no pollution. Attached Figure Description
[0040] Figure 1This is a schematic diagram of the preparation system for preparing MOFs materials in this invention.
[0041] Figure 2 This is a schematic diagram of the material preparation apparatus in this invention.
[0042] Figure 3 This is a schematic diagram of the tail gas desulfurization mechanism in this invention.
[0043] Figure 4 This is a schematic diagram of the tail gas acidification and absorption mechanism in this invention.
[0044] Figure 5 This is a schematic diagram of the activated carbon adsorption-desorption tail gas purification mechanism in this invention.
[0045] The numbers in the diagram are as follows:
[0046] 1-Inert gas tank; 2- PLC control unit; 3-Blower; 4-Heating mechanism; 5-Negative pressure sensor; 6-Wind baffle; 7-Baffle plate; 8-Ventilation hole; 9-Reaction vessel; 10-Shock absorption mechanism; 11-Temperature sensor; 12-Tail gas desulfurization mechanism; 13-Activated carbon adsorption-desorption tail gas purification mechanism; 14-Tail gas acidification absorption mechanism; 15-Material preparation device; 16-Miniature negative pressure device; 17-Tail gas detection device; 18-Desulfurization liquid storage tank; 19-Desulfurization liquid recovery tank; 20-Desulfurization cylinder; 21-Desulfurization spray assembly; 22-Filter element; 23-Tail gas filtration assembly; 24-Electrically controlled valve; 25-Blower motor; 26-First connecting pipe; 27-Tail gas adsorption-desorption assembly; 28-Fixing ring; 29-Activated carbon adsorption plate; 30-Carbon monoxide gas tank; 31-Concentrated sulfuric acid storage tank; 32-Alkali storage tank; 33-Alkali washing assembly; 34-Water washing assembly; 35-Acid washing assembly; 36-Tail liquid recovery tank; 37-Dilute acid recovery tank; 38-Concentrated acid recovery tank; 39-Alkali spray component; 40-Water spray component; 41-Acid spray component; 42-Second connecting pipe; 43-First connecting pipe; 44-Second connecting pipe; 45-Support frame; 46-Negative pressure motor; 47-Gas collection chamber;
[0047] V1~V17 - Valves. Detailed Implementation
[0048] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.
[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0050] Example
[0051] See Figures 1 to 5 This embodiment provides a preparation system for preparing MOFs materials, comprising: a material preparation device 15; an exhaust gas treatment device connected to the outlet of the material preparation device 15 via a first connecting pipe 43 to absorb and treat different toxic and harmful gases generated during the preparation reaction; an inert gas tank 1 connected to the inlet of the material preparation device 15 via a second connecting pipe 44; a micro negative pressure device 16 to facilitate the discharge of exhaust gas generated during the reaction; an exhaust gas detection device 17 to measure and analyze the components in the exhaust gas; and a PLC control unit 2 to enable signal feedback adjustment of each device in the system.
[0052] The material preparation device 15 further includes a heating mechanism 4, a blower 3, a baffle plate 6, a partition plate 7, a shock absorption mechanism 10, a support frame 45, a reaction vessel 9, and a temperature sensor 11. The heating mechanism 4 is located inside the housing of the material preparation device 15 and on both sides of the housing. The blower 3 is located at the four corners on both sides of the housing of the material preparation device 15 to force airflow into the material preparation device 15, ensuring uniform circulation of hot air within the material preparation device 15. The baffle plate 6 is U-shaped and symmetrically arranged inside the housing of the material preparation device 15, forming symmetrical air inlets between the baffle plates 6. The partition plate 7 is located on the six sides of the housing of the material preparation device 15, and the partition plate 7 and the baffle plate 6 form a symmetrical air inlet. A gap is left between the air plates 6, and multiple equidistant ventilation holes are provided on the partition plate 7; the shock absorption mechanism 10 is set on the partition plate 7, and the shock absorption mechanism 10 includes a spring. The shock absorption mechanism, under the action of the elastic potential energy of the spring, buffers the reaction vessel 9 body on the support frame 45 to minimize the bumping of the reaction vessel 9 body during use; the support frame 45 is set on the shock absorption mechanism 10; the reaction vessel 9 is placed on the support frame 45 for the preparation reaction of MOFs materials. The temperature sensor 11 is set inside the material preparation device 15 to sense the internal temperature change of the material preparation device 15 and feed the temperature signal back to the PLC control unit 2.
[0053] By setting up the baffle plate 6 to prevent hot air from blowing directly onto the reactor 9, the flow rate of the hot air can be reduced. In conjunction with the operation of the blower 3, the hot air is finally blown onto the reactor through the ventilation holes on the baffle plate 7, so that the hot air flows out at a lower flow rate, and the heat in the material preparation device 15 is evenly distributed to achieve uniform drying.
[0054] The exhaust gas treatment device includes: an exhaust gas desulfurization mechanism 12; an exhaust gas acidification absorption mechanism 14 connected to the outlet of the material preparation device 15; and an activated carbon adsorption-desorption exhaust gas purification mechanism 13; wherein the exhaust gas desulfurization mechanism 12, the activated carbon adsorption-desorption exhaust gas purification mechanism 13, and the exhaust gas acidification absorption mechanism 14 are coupled to achieve exhaust gas treatment.
[0055] When SO2 and other sulfides are generated during the MOFs material preparation reaction, the exhaust gas is discharged into the exhaust gas desulfurization unit 12 to absorb and treat the SO2 and other sulfides in the exhaust gas. When the exhaust gas that is easily soluble in acid absorbent, alkali absorbent and water is generated during the MOFs material preparation reaction, the exhaust gas is discharged into the exhaust gas acidification absorption unit 14 to absorb and treat the exhaust gas that is easily soluble in acid absorbent, alkali absorbent and water. When the exhaust gas containing organic compounds such as benzene, alcohol, ketone, ester, gasoline and other compounds is generated during the MOFs material preparation reaction, the exhaust gas is discharged into the activated carbon adsorption desorption exhaust gas purification unit 13 to absorb and treat the exhaust gas containing organic compounds such as benzene, alcohol, ketone, ester, gasoline and other compounds. The exhaust gas desulfurization mechanism 12 includes: a desulfurization cylinder 20 and a desulfurization liquid storage tank 18; the desulfurization cylinder 20 is connected to the outlet of the material preparation device 15, the desulfurization cylinder 20 is provided with a desulfurization spray assembly 21, and the bottom of the desulfurization cylinder 20 is provided with a desulfurization liquid recovery tank 19; the desulfurization liquid storage tank 18 is connected to the desulfurization spray assembly 21 to provide desulfurization liquid for the desulfurization process.
[0056] The exhaust gas acidification and absorption mechanism 14 includes: a water washing assembly 34, an acid washing assembly 35, an alkaline washing assembly 33, and a second connecting pipe 42; the water washing assembly 34 is equipped with a water spray element 40, and a dilute acid recovery tank 37 is provided at the bottom of the water washing assembly 34; the gas inlet of the water washing assembly 34 is connected to the acid washing assembly 35, and the gas outlet of the water washing assembly 34 is connected to the alkaline washing assembly 33; the acid washing assembly 35 is equipped with an acid spray element 41, and a concentrated acid recovery tank is provided at the bottom of the acid washing assembly 35. Tank 38, the gas outlet of the acid washing assembly 35 is connected to the water washing assembly 34, and the acid spray component 41 is connected to the concentrated sulfuric acid storage tank 31; the alkali washing assembly 33 is equipped with an alkali spray component 39, the bottom of the alkali washing assembly 33 is provided with a tail liquid recovery tank, the gas inlet of the alkali washing assembly 33 is connected to the water washing assembly 34, and the alkali spray component 39 is connected to the alkali storage tank 32; the second connecting pipe 42 connects the gas outlet and gas inlet of the water washing assembly 34, the acid washing assembly 35 and the alkali washing assembly 33.
[0057] The activated carbon adsorption-desorption exhaust gas purification mechanism 13 includes: an exhaust gas filter assembly 23, an exhaust gas adsorption-desorption assembly 27, a first connecting pipe 26, a blower motor 25, and a carbon monoxide gas tank 30; the exhaust gas filter assembly 23 is connected to the outlet of the material preparation device 15, and the exhaust gas filter assembly 23 is provided with a filter element 22, which is used to filter impurities in the exhaust gas generated during the material preparation process; the exhaust gas adsorption-desorption assembly 27 is connected to the outlet of the exhaust gas filter assembly 23, and the exhaust gas adsorption-desorption assembly 27 is provided with an activated carbon adsorption plate 29, and the activated carbon adsorption plate 29 is externally equipped with... A fixing ring 28 is provided, through which an activated carbon adsorption plate 29 is installed, and the tank of a tail gas adsorption-desorption assembly 27 is connected via the fixing ring 28. The tail gas adsorption-desorption assembly 27 is used for adsorption and desorption treatment of tail gas. A first connecting pipe 26 connects the outlet of the tail gas filter assembly 23 with the inlet of the tail gas adsorption-desorption assembly 27. A blower motor 25 is disposed inside the first connecting pipe 26. A carbon monoxide gas tank 30 is connected to the first connecting pipe 26 between the tail gas filter assembly 23 and the blower motor 25. The carbon monoxide gas tank 30 is used to provide carbon monoxide gas catalysis for the desorption process.
[0058] The exhaust gas filter assembly 23 can filter the exhaust gas, and the exhaust gas adsorption-desorption assembly 27 can adsorb the exhaust gas. The continuous arrangement of the exhaust gas filter assembly 23 and the exhaust gas adsorption-desorption assembly 27 can simultaneously complete the filtration and adsorption of exhaust gas, resulting in high exhaust gas treatment efficiency. After the activated carbon adsorbs the exhaust gas to a certain concentration or for a certain period of time, the electric control valve 24 is closed, and the high-temperature carbon monoxide gas tank 30 is connected through the valve for carbon monoxide gas catalysis. With the help of the blower motor 25, the activated carbon desorption treatment can be completed, and the desorbed gas is discharged from the outlet of the exhaust gas adsorption-desorption assembly 27.
[0059] The suction port of the micro negative pressure device 16 is connected to the exhaust port of the exhaust gas treatment device, and the exhaust port of the micro negative pressure device 16 is connected to the exhaust gas detection device 17. The suction port of the micro negative pressure device 16 can continuously form a vacuum or negative pressure, and the exhaust port of the micro negative pressure device 16 forms a slight positive pressure, so as to smoothly remove the exhaust gas generated during the reaction process.
[0060] The miniature negative pressure device 16 includes: an air collection chamber 47, a negative pressure sensor 5, and a negative pressure motor 46. The negative pressure sensor 5 is installed in the air collection chamber 47 of the miniature negative pressure device 16 to monitor the internal pressure of the miniature negative pressure device 16 in real time and feed back an electrical signal to the PLC control unit. By detecting the negative pressure, the speed of the negative pressure motor is adjusted to the set pressure range. The negative pressure motor 46 discharges air to reduce the air pressure in the material preparation device and the exhaust gas treatment device, making the gas in the material preparation device and the exhaust gas treatment device rarefied and forming a negative pressure zone.
[0061] The negative pressure sensor 5 monitors the internal pressure of the miniature negative pressure device 16 in real time and sends an electrical signal back to the PLC control unit 2. By detecting the negative pressure, the speed of the negative pressure motor 46 is adjusted to reach the set pressure range.
[0062] After being treated by the exhaust gas desulfurization unit 12, the exhaust gas acidification absorption unit 14, and the activated carbon adsorption desorption exhaust gas purification unit 13, the exhaust gas enters the exhaust gas detection unit 17 through the micro negative pressure device 16. If the components in the exhaust gas meet the exhaust gas emission standards, it is discharged into the atmosphere through the pipeline. If the components in the exhaust gas still do not meet the exhaust gas emission standards, the pressure range set by the system is appropriately reduced to reduce the speed of the negative pressure motor 46, slowing down the exhaust gas treatment process and making the exhaust gas absorption more complete. At the same time, according to the exhaust gas component analysis given by the exhaust gas detection unit 17, the exhaust gas is passed back into the exhaust gas desulfurization unit 12, the exhaust gas acidification absorption unit 14, or the activated carbon adsorption desorption exhaust gas purification unit 13 for treatment. The treated exhaust gas enters the exhaust gas detection unit 17 again through the micro negative pressure device 16. This process is repeated until the components in the exhaust gas meet the exhaust gas emission standards and are discharged into the atmosphere through the pipeline.
[0063] Furthermore, for MOFs materials with strict quality requirements, inert gas is introduced into the material preparation device to circulate the inert gas in the inert gas tank 1 and the material preparation device 15, so as to prevent the sample in the chamber of the material preparation device 15 from reacting with oxygen in the air at high temperature. This is especially suitable for samples that are easily oxidized at high temperatures.
[0064] The exhaust gas treatment device is connected to the outlet of the material preparation device 15 via the first connecting pipe 43.
[0065] The inert gas tank 1 is connected to the air inlet of the material preparation device 15 via the second connecting pipe 44.
[0066] The exhaust gas detection device 17 uses non-dispersive infrared and electrochemical sensors to measure and analyze the components in the exhaust gas.
[0067] The preparation system for preparing MOFs materials also includes a temperature sensor 11 and a negative pressure sensor 5; the temperature sensor 11 is located inside the material preparation device 15; the negative pressure sensor 5 is located inside the micro negative pressure device 16 5.
[0068] The PLC control unit 2 is connected to the material preparation device 15, the exhaust gas treatment device, the micro negative pressure device 16, the exhaust gas detection device 17, the temperature sensor 11, and the negative pressure sensor 5 to realize timely signal feedback and control adjustment.
[0069] The PLC control unit 2 is communicatively connected to the material preparation device 15, the exhaust gas treatment device, the micro negative pressure device 16, the exhaust gas detection device 17, the temperature sensor 11, and the negative pressure sensor 5.
[0070] The communication connection includes wired or wireless connections.
[0071] V1 to V17 are all valves, installed on each pipeline. Among them, V16 is a three-way valve, and the others are two-way valves.
[0072] The negative pressure sensor 5 is a commonly used or purchased component. Those skilled in the art are capable of selecting the appropriate specifications, models and parameters according to actual needs. In this embodiment, the negative pressure sensor 5 model is QDF70B-JX, the measurement range is -100KPa to 0 to 100KPa, the compensation temperature is 0 to 50℃, the ambient temperature is -20 to 45℃, the working mode is differential pressure, and the overload pressure is 300%FS.
[0073] Temperature sensor 11 is a commonly used or purchased component. Those skilled in the art are able to select the appropriate specifications, models and parameters according to actual needs. In this embodiment, the temperature sensor 11 model is KPS-IN600-K, the temperature range is -50~1150℃, the probe material is INCONEL600 high-temperature alloy, the temperature accuracy is ≤±1.5℃, 0.4%, the probe diameter is 2mm, and the probe length is 150mm.
[0074] The PLC control unit 2 includes a controller, which is a microcontroller or a processor based on x86, ARM, or RISC-V architecture. In this embodiment, the controller is an x86 architecture processor.
[0075] The non-dispersive infrared analyzer is used for non-dispersive infrared radiation. The electrochemical sensor is a commonly used or purchased component, and those skilled in the art are capable of selecting the appropriate specifications, models, and parameters according to actual needs. In this embodiment, the electrochemical sensor model is MQ-E3-NO2, the detected gas is nitrogen dioxide, the range is 0~20ppm, the maximum measurement limit is 150ppm, and the resolution is 0.1ppm.
[0076] The workflow of the above-mentioned preparation system for MOF materials is as follows:
[0077] S1. When the prepared MOFs material has strict quality requirements, such as materials that are easily oxidized at high temperatures, turn valve (three-way valve) V16 to circulate the inert gas in the inert gas tank 1 and the air in the material preparation device 15 through the second connecting pipe 44 to prevent the sample in the material preparation device 15 from reacting with oxygen in the air at high temperatures. When the prepared MOFs material does not have strict quality requirements, turn valve (three-way valve) V16 to circulate the outside air and the air in the material preparation device 15 through the second connecting pipe 44.
[0078] S2. Set the temperature required for the MOFs material preparation reaction. Temperature sensor 11 feeds back the temperature signal to PLC control unit 2. PLC control unit 2 controls the heating mechanism 4 and blower 3 to be turned on. Heating mechanism 4 heats the material preparation device 15. Blower 3 runs and hot air is reduced in flow rate by baffle 6 and blown into reaction vessel 9 through ventilation holes 8 on partition 7, so that the heat in the material preparation device 15 is evenly distributed and the internal temperature reaches the set material reaction temperature. The MOFs material is prepared and reacted in reaction vessel 9.
[0079] The toxic and harmful gases generated during the reaction of S3 and MOFs materials enter the tail gas treatment device through the first connecting pipe 43. When the tail gas contains sulfides such as SO2, valves V1, V13, and V4 are opened, and the tail gas is fed into the tail gas desulfurization mechanism 12 through the first connecting pipe 43 to desulfurize the tail gas and absorb the sulfides such as SO2 in the tail gas. When the tail gas contains gases that are easily soluble in acid absorbent, alkali absorbent, and water, valves V3, V7, and V12 are opened, and the tail gas is fed into the tail gas acidification absorption mechanism 14 through the first connecting pipe 43 to perform acid washing, water washing, and alkali washing on the tail gas, and absorb and treat the gases that are easily soluble in acid absorbent. When the exhaust gas contains organic compounds such as benzene, alcohols, ketones, esters, and gasoline, valves V2, V6, and V5 are opened to allow the exhaust gas to enter the activated carbon adsorption-desorption exhaust gas purification mechanism 13 through the first connecting pipe 43. In this system, the exhaust gas is filtered in the exhaust gas filter component 23. The filtered exhaust gas then enters the exhaust gas adsorption-desorption component 27 through the first connecting pipe 26 to complete the adsorption of the exhaust gas. After the activated carbon adsorbs the exhaust gas to a certain concentration or for a certain period of time, the electric control valve 24 is closed, and high-temperature carbon monoxide gas is introduced through valve V17 for catalytic oxidation. In conjunction with the blower motor 25, the activated carbon desorption process is completed. The desorbed gas is discharged from the outlet. The organic compounds such as benzene, alcohols, ketones, esters, and gasoline in the exhaust gas are absorbed and treated.
[0080] S4. The exhaust gas, after being treated by the exhaust gas desulfurization mechanism 12, the exhaust gas acidification absorption mechanism 14, and the activated carbon adsorption desorption exhaust gas purification mechanism 13, is smoothly discharged through the micro negative pressure device 16. The negative pressure motor 46 inside the micro negative pressure device 16 discharges air to reduce the air pressure inside the material preparation device and the exhaust gas treatment device, making the gas inside the material preparation device and the exhaust gas treatment device rarefied and forming a negative pressure zone. The negative pressure sensor 5 monitors the internal pressure of the micro negative pressure device 16 in real time and feeds back an electrical signal to the PLC control unit 2. By detecting the negative pressure, the speed of the negative pressure motor 46 is adjusted to reach the set pressure range.
[0081] S5. After the exhaust gas is discharged through the micro negative pressure device 16, it enters the exhaust gas detection device 17. If the components in the exhaust gas meet the exhaust gas emission standards, valve V15 is opened and the exhaust gas is discharged into the atmosphere through the pipeline. If the components in the exhaust gas still do not meet the exhaust gas emission standards, the pressure range set by the system is appropriately reduced to reduce the speed of the negative pressure motor 46, slowing down the exhaust gas treatment process and allowing for more complete exhaust gas absorption. At the same time, based on the exhaust gas component analysis given by the exhaust gas detection device 17, valve V14 is opened, and the exhaust gas is passed through the pipeline back into the exhaust gas desulfurization unit 12, the exhaust gas acidification absorption unit 14, or the activated carbon adsorption desorption exhaust gas purification unit 13 for treatment. The treated exhaust gas then enters the exhaust gas detection device 17 again through the micro negative pressure device 16. This process is repeated until the components in the exhaust gas meet the exhaust gas emission standards, at which point valve V15 is opened and the exhaust gas is discharged into the atmosphere through the pipeline.
[0082] The above-described preparation system was used to prepare MOF materials, and the preparation steps are as follows:
[0083] Take the preparation of MOF material MIL-53(Al) as an example.
[0084] The raw materials for preparation were Al(NO3)3•9H2O, terephthalic acid, and deionized water. The reaction temperature was 220℃, and the reaction time was 72h.
[0085] S1. Add the raw materials to the reaction vessel 9 in proportion, place the reaction vessel 9 into the material preparation device 15, and then power on the MOFs material preparation system.
[0086] S2. The prepared MOF material MIL-53 (Al) does not have strict quality requirements. Turn the valve (three-way valve) V16 to circulate the outside air and the air in the material preparation device 15 through the second connecting pipe 44.
[0087] S3. Set the required temperature of 220°C for the MOF material MIL-53 (Al) preparation reaction. Temperature sensor 11 feeds back the temperature signal to PLC control unit 2. PLC control unit 2 controls the heating mechanism 4 and blower 3 to be turned on. Heating mechanism 4 heats the material preparation device 15. Blower 3 runs and hot air is reduced in flow rate by baffle 6 and blown into reaction vessel 9 through ventilation holes 8 on partition 7, so that the heat in the material preparation device 15 is evenly distributed and the internal temperature reaches the set material reaction temperature of 220°C. The MOF material is prepared and reacted in reaction vessel 9.
[0088] S4, during the preparation reaction of MOF material MIL-53 (Al), toxic and harmful nitrogen oxides and organic compounds containing benzene, esters, etc., such as nitric acid, NO2, benzene dioxide, formic acid, formaldehyde, etc., are generated. Therefore, valves V2, V7, and V8 are opened, while other valves are closed, and the exhaust gas enters the exhaust gas treatment device through the first connecting pipe 43. The exhaust gas is then passed through the activated carbon adsorption-desorption exhaust gas purification mechanism 13 and the exhaust gas acidification absorption mechanism 14. The exhaust gas is filtered in the exhaust gas filter component 23 in the activated carbon adsorption-desorption exhaust gas purification mechanism 13, and the filtered exhaust gas enters the exhaust gas treatment device through the first connecting pipe 26. The adsorption-desorption assembly 27 can complete the adsorption of exhaust gas. After the activated carbon adsorbs the exhaust gas to a certain concentration or for a certain time, the electric control valve 24 is closed and the valve V17 is opened to connect the high-temperature carbon monoxide gas catalyst. In conjunction with the blower motor 25, the desorption treatment of the activated carbon is completed. The desorbed gas is discharged from the outlet. The acid washing assembly 35 in the exhaust gas acidification absorption mechanism 14 acid washes the exhaust gas. The acid-washed exhaust gas enters the water washing assembly 34 through the second connecting pipe 42. The water washing assembly 34 washes the exhaust gas with water. The water-washed exhaust gas enters the alkaline washing assembly 33 through the second connecting pipe 42. The alkaline washing assembly 33 washes the exhaust gas with alkali. The alkaline-washed exhaust gas is discharged from the outlet. The toxic and harmful organic compounds containing benzene, esters, etc., and nitrogen oxides in the exhaust gas are absorbed and treated.
[0089] S5. The exhaust gas treated by the exhaust gas acidification and absorption mechanism 14 and the activated carbon adsorption and desorption exhaust gas purification mechanism 13 is smoothly discharged through the micro negative pressure device 16. The negative pressure motor 46 in the micro negative pressure device 16 discharges air to reduce the air pressure in the material preparation device 15 and the exhaust gas treatment device. The gas in the material preparation device 15 and the exhaust gas treatment device becomes rarefied, forming a negative pressure zone. The negative pressure sensor 5 monitors the internal pressure of the micro negative pressure device 16 in real time and feeds back an electrical signal to the PLC control unit 2. By detecting the negative pressure, the speed of the negative pressure motor 46 is adjusted to reach the set pressure range.
[0090] S6. After being discharged through the micro negative pressure device 16, the exhaust gas enters the exhaust gas detection device 17. If the components in the exhaust gas meet the exhaust gas emission standards, valve V15 is opened, and the exhaust gas is discharged into the atmosphere through the pipeline. If the components in the exhaust gas still do not meet the exhaust gas emission standards, the pressure range set by the system is appropriately reduced to decrease the speed of the negative pressure motor 46, thereby slowing down the exhaust gas treatment process and allowing for more complete exhaust gas absorption. At the same time, based on the exhaust gas component analysis given by the exhaust gas detection device 17, if NO2, a gas soluble in water and alkaline solutions, is still present, valves V14, V3, and V4 are opened. With valve V8 closed, the exhaust gas is passed through the pipeline back into the exhaust gas acidification and absorption mechanism 14. If the exhaust gas still contains organic compounds such as benzene dioxide, valves V14, V2, V10, and V9 are opened, while the other valves remain closed. The exhaust gas is then passed through the pipeline back into the activated carbon adsorption and desorption exhaust gas purification mechanism 13. The treated exhaust gas then passes through the micro negative pressure device 16 into the exhaust gas detection device 17. This process is repeated until the components in the exhaust gas meet the exhaust gas emission standards. Then, valve V15 is opened, and the exhaust gas is discharged into the atmosphere through the pipeline.
[0091] The prepared MOF material was MIL-53(Al).
[0092] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.
Claims
1. A preparation system for preparing MOF materials, characterized in that, The preparation system for preparing MOF materials includes: Material preparation apparatus (15); The exhaust gas treatment device is connected to the outlet of the material preparation device (15) and is used to absorb and treat different toxic and harmful gases generated during the preparation reaction. An inert gas container (1) is connected to the inlet of the material preparation device (15); A miniature negative pressure device (16) is used to smoothly remove the tail gas generated during the reaction process; Exhaust gas detection device (17) is used to measure and analyze the components in exhaust gas; PLC control unit (2) is used to realize signal feedback regulation of each device in the preparation system; The material preparation device (15) also includes a heating mechanism (4), a blower (3), a baffle plate (6), a partition plate (7), a shock absorption mechanism (10), a support frame (45), a reaction vessel (9), and a temperature sensor (11). The heating mechanism (4) is located inside the housing of the material preparation device (15) and on both sides of the housing of the material preparation device (15); The blowers (3) are respectively set at the four corners on both sides of the inside of the material preparation device (15) to force air to the material preparation device (15) so that the hot air inside the material preparation device (15) circulates evenly. The baffle (6) is U-shaped and symmetrically arranged inside the housing of the material preparation device (15), and the baffles (6) form symmetrical air inlets. The partitions (7) are respectively set on the six sides inside the box of the material preparation device (15). There is a gap between the partitions (7) and the baffle (6). The partitions (7) are provided with a plurality of equidistant ventilation holes. The shock absorption mechanism (10) is disposed on the partition plate (7), the shock absorption mechanism (10) includes a spring, and the shock absorption mechanism (10) is used to buffer the reactor (9) body on the support frame (45); The support frame (45) is mounted on the shock absorption mechanism (10); The reactor (9) is placed on the support frame (45) for the preparation reaction of MOFs materials; The temperature sensor (11) is installed inside the material preparation device (15) to sense the internal temperature change of the material preparation device (15) and feed the temperature signal back to the PLC control unit (2).
2. The preparation system for preparing MOF materials according to claim 1, characterized in that, The exhaust gas treatment device includes: Tail gas desulfurization mechanism (12); The exhaust gas acidification and absorption mechanism (14) is connected to the outlet of the material preparation device (15); Activated carbon adsorption-desorption tail gas purification mechanism (13); The tail gas desulfurization mechanism (12), the activated carbon adsorption and desorption tail gas purification mechanism (13), and the tail gas acidification and absorption mechanism (14) are coupled together to achieve tail gas treatment.
3. The preparation system for preparing MOF materials according to claim 2, characterized in that, The tail gas desulfurization mechanism (12) includes: a desulfurization cylinder (20) and a desulfurization liquid storage tank (18). The desulfurization cylinder (20) is connected to the outlet of the material preparation device (15). The desulfurization cylinder (20) is equipped with a desulfurization spray assembly (21), and a desulfurization liquid recovery tank (19) is provided at the bottom of the desulfurization cylinder (20). The desulfurization liquid storage tank (18) is connected to the desulfurization spray assembly (21).
4. The preparation system for preparing MOF materials according to claim 2, characterized in that, The exhaust gas acidification and absorption mechanism (14) includes: a water washing assembly (34), an acid washing assembly (35), an alkaline washing assembly (33), and a second connecting pipe (42). The water washing assembly (34) is provided with a water spray component (40), and a dilute acid recovery tank (37) is provided at the bottom of the water washing assembly (34). The gas inlet of the water washing assembly (34) is connected to the acid washing assembly (35), and the gas outlet of the water washing assembly (34) is connected to the alkaline washing assembly (33). The pickling assembly (35) is equipped with an acid spraying component (41), and a concentrated acid recovery tank (38) is provided at the bottom of the pickling assembly (35). The gas outlet of the pickling assembly (35) is connected to the water washing assembly (34), and the acid spraying component (41) is connected to the concentrated sulfuric acid storage tank (31). The alkaline washing assembly (33) is equipped with an alkaline spray component (39), and the bottom of the alkaline washing assembly (33) is provided with a tail liquid recovery tank. The gas inlet of the alkaline washing assembly (33) is connected to the water washing assembly (34), and the alkaline spray component (39) is connected to the alkaline liquid storage tank (32). The second connecting pipe (42) connects the gas outlet and gas inlet of the water washing assembly (34), the acid washing assembly (35) and the alkali washing assembly (33).
5. The preparation system for preparing MOF materials according to claim 3, characterized in that, The activated carbon adsorption-desorption tail gas purification mechanism (13) includes: a tail gas filter assembly (23), a tail gas adsorption-desorption assembly (27), a first connecting pipe (26), a blower motor (25), and a carbon monoxide gas tank (30). The exhaust gas filter assembly (23) is connected to the outlet of the material preparation device (15). The exhaust gas filter assembly (23) is provided with a filter element (22). The exhaust gas filter assembly (23) is used to filter impurities in the exhaust gas generated during the material preparation process. The exhaust gas adsorption-desorption assembly (27) is connected to the outlet of the exhaust gas filter assembly (23). The exhaust gas adsorption-desorption assembly (27) is provided with an activated carbon adsorption plate (29) and a fixing ring (28) is provided outside the activated carbon adsorption plate (29). The activated carbon adsorption plate (29) is installed through the fixing ring (28) and the tank of the exhaust gas adsorption-desorption assembly (27) is connected through the fixing ring (28). The exhaust gas adsorption-desorption assembly (27) is used to adsorb and desorb exhaust gas. The first connecting pipe (26) connects the outlet of the exhaust gas filter assembly (23) and the inlet of the exhaust gas adsorption and desorption assembly (27); The blower motor (25) is installed inside the first connecting pipe (26); A carbon monoxide gas canister (30) is connected to a first connecting pipe (26) between the exhaust gas filter assembly (23) and the blower motor (25), the carbon monoxide gas canister (30) being used to provide carbon monoxide gas catalysis for the desorption process.
6. The preparation system for preparing MOF materials according to claim 1, characterized in that, The suction port of the micro negative pressure device (16) is connected to the exhaust port of the exhaust gas treatment device, and the exhaust port of the micro negative pressure device (16) is connected to the exhaust gas detection device (17). The vacuum or negative pressure at the air extraction port of the micro negative pressure device (16) can be continuously formed, and the micro positive pressure at the exhaust port of the micro negative pressure device (16) can be formed to smoothly remove the tail gas generated during the reaction.
7. The preparation system for preparing MOF materials according to claim 6, characterized in that, The miniature negative pressure device (16) includes: an air collection chamber (47), a negative pressure sensor (5), and a negative pressure motor (46). The negative pressure sensor (5) is installed in the gas collection chamber (47) of the miniature negative pressure device (16); The negative pressure motor (46) reduces the air pressure in the material preparation device and the exhaust gas treatment device by discharging air outward, making the gas in the material preparation device and the exhaust gas treatment device less dense and forming a negative pressure zone.
8. The preparation system for preparing MOF materials according to claim 1, characterized in that, The exhaust gas treatment device is connected to the outlet of the material preparation device (15) via the first connecting pipe (43).
9. The preparation system for preparing MOFs materials according to claim 1, characterized in that, The inert gas tank (1) is connected to the air inlet of the material preparation device (15) through the second connecting pipe (44).