Device for immobilizing and converting biomass enzyme into carbon dioxide

Abstract

The utility model provides a device for immobilizing and converting carbon dioxide by using biomass enzyme, which overcomes the defects that the carbon sequestration stability is poor and the conversion efficiency does not reach the expected effect when the carbon dioxide is immobilized and converted by using the biomass enzyme in the prior art. The device comprises a reaction tank, a fixed catalysis unit, a stirring unit, a purification unit and a storage tank, wherein the fixed catalysis unit comprises a plurality of porous partition plates which are arranged at intervals from top to bottom and are detachably mounted in the reaction tank in a matched manner; each porous partition plate comprises an upper-layer partition plate and a lower-layer partition plate, the two partition plates are mounted in an up-down matching manner to form a cavity capable of accommodating an immobilized carrier, and biomass enzyme is attached and fixed in the immobilized carrier. According to the utility model, the biomass enzyme is immobilized, and CO2 is converted into bicarbonate, so that the recovery rate, stability and reusability of the enzyme are improved, the total cost of the enzyme is reduced, and meanwhile, the rate of converting CO2 into bicarbonate and the conversion rate are also favorably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of carbon dioxide fixation and conversion, and specifically relates to a device for biomass enzyme fixation and conversion of carbon dioxide. Background Art

[0002] Since the Industrial Revolution, the burning of large amounts of fossil fuels has caused a sharp increase in CO2 emissions, making the global climate even worse. In order to achieve the goals of carbon peak and carbon neutrality, carbon capture, utilization and storage technologies are indispensable. Reducing CO2 emissions and developing new technologies for low-cost and high-efficiency CO2 resource utilization have become urgent tasks.

[0003] Based on its unique advantages in CO2 conversion, enzyme technology has gradually attracted people's attention. Among the six natural carbon fixation pathways discovered in nature, most of them are catalyzed by core carbon fixation enzymes; however, these core carbon fixation enzymes have slow catalytic rates, complex reaction processes, and are difficult to modify and optimize. Therefore, in the field of CO2 recycling, biomass enzymes came into being. Biomass enzymes can convert CO2 into bicarbonate for CO2 reuse, and are increasingly favored due to their catalytic advantages such as high efficiency, high selectivity, and mild conditions. However, in actual application, the recycling rate of biomass enzymes is low, and the efficiency of carbon dioxide fixation conversion is not high, which cannot achieve the expected effect.

[0004] In view of this, the present invention considers it necessary to improve the technology of biomass enzyme fixation and conversion of carbon dioxide. Summary of the invention

[0005] The utility model aims to solve the shortcomings of low recycling rate and low conversion efficiency of existing biomass enzyme fixed carbon dioxide conversion, and to provide a biomass enzyme fixed carbon dioxide conversion device.

[0006] The inventive concept of the utility model:

[0007] In view of the existing problems, the research team of the utility model analyzed the reasons and found that the main reason for the low efficiency of bicarbonate conversion is that the biomass enzyme in the fixed carbon dioxide conversion device is not fixed, so that the biomass enzyme moves during use, resulting in unstable catalytic performance and failure to play the best carbon fixation effect. Therefore, the utility model improves the biomass enzyme fixed carbon dioxide conversion device to improve the stability and efficiency of biomass enzyme fixed carbon dioxide conversion.

[0008] Based on the above invention concept, in order to achieve the invention purpose, the specific technical solution provided by the utility model is as follows:

[0009] A biomass enzyme fixed carbon dioxide conversion device, which is special in that:

[0010] It includes a reaction tank, a fixed catalytic unit, a stirring unit, a purification unit and a storage tank;

[0011] The reaction tank is used for fixed conversion reaction, and has a carbon dioxide inlet, a liquid inlet and a product reflux inlet on the top; a support leg is provided at the bottom, and a product outlet is provided at the bottom; a carbon dioxide delivery pipe directly connected to the bottom of the reaction tank is installed at the carbon dioxide inlet; the liquid inlet is for the convenience of adding water used for the reaction into the reaction tank;

[0012] The fixed catalytic unit includes a plurality of porous baffles which are arranged at intervals from top to bottom and can be detachably adapted to be installed in the reaction tank (the fixed catalytic unit should be arranged as a whole downward so that the whole is immersed below the liquid surface and is in full contact with water and carbon dioxide); each porous baffle includes an upper baffle and a lower baffle, and the two baffles are installed in a coordinated manner up and down to form a cavity capable of accommodating an immobilized carrier, and a biomass enzyme is attached and fixed in the immobilized carrier, and the biomass enzyme can be attached and fixed by soaking the immobilized carrier (such as hydrogel) in a biomass enzyme solution. At this time, the biomass enzyme is stably filled in the reaction tank by the immobilized carrier, and the biomass enzyme will not move, even flow, or become inactivated, thereby improving the stability of the biomass enzyme itself, thereby maximizing its carbon fixation effect; at the same time, this fixing method is also conducive to the recovery of the biomass enzyme;

[0013] The upper baffle and the lower baffle are provided with a first through hole, a second through hole and a plurality of third through holes correspondingly; wherein the first through hole is coaxially arranged with the reaction tank to reserve a working space for the stirring unit; the second through hole is arranged corresponding to the carbon dioxide inlet end to reserve an installation space for the carbon dioxide delivery pipe, that is, the carbon dioxide delivery pipe passes through the second through holes of each porous baffle in sequence until it reaches the bottom of the reaction tank; the third through hole is for making water and carbon dioxide fully contact with the biomass enzyme;

[0014] The stirring unit is installed on the top of the reaction tank, and its stirring end is located in the working space formed by the first through holes of each porous partition, so that the stirring end can fully stir the reaction liquid, promote the carbon fixation reaction, and improve the carbon fixation efficiency;

[0015] The purification unit comprises a product reflux pipe, and a first switch valve, a pump, and a second switch valve sequentially arranged on the product reflux pipe along the product reflux direction; wherein the inlet of the product reflux pipe is connected to the product outlet end, and the outlet is connected to the product reflux inlet end; after the carbon fixation reaction is completed, the first switch valve and the second switch valve are opened, and the pump pumps the bicarbonate solution generated by the reaction in the reaction tank back to the reaction tank through the product reflux pipe for further reaction, so as to obtain a high-concentration bicarbonate solution;

[0016] The storage tank is connected to the product outlet through a product delivery pipe, and is provided with a third switch valve for storing the final bicarbonate solution product.

[0017] Furthermore, a carbon dioxide equalizer is installed at the outlet of the carbon dioxide delivery pipe;

[0018] The carbon dioxide equalizer is horizontally arranged below the fixed catalytic unit, close to the bottom of the reaction tank, and includes a plurality of equalizer tubes; the plurality of equalizer tubes are evenly distributed radially around the central axis of the reaction tank, and each equalizer tube is provided with a plurality of air outlet holes along the length direction, so that the carbon dioxide gas can evenly enter the reaction tank and fully participate in the reaction.

[0019] Furthermore, the stirring unit includes a transmission motor, a transmission shaft and a stirring paddle;

[0020] The transmission motor is located at the top of the reaction tank;

[0021] The transmission shaft is coaxially arranged in the reaction tank, the upper end of which is connected to the output shaft of the transmission motor, and the lower end of which is connected to the stirring paddle;

[0022] The stirring paddle comprises a plurality of vertically arranged stirring rods; the plurality of stirring rods are connected to the lower end of the transmission shaft through a crossbeam and are evenly distributed on the same circumference. The stirring paddle has a stronger stirring capacity and can fully stir the reaction liquid while reducing energy consumption.

[0023] Furthermore, the porous partition is installed in the reaction tank by means of a snap assembly (the existing snap assembly can be used), which is convenient for assembly and disassembly, and convenient for recycling and replacing the immobilized carrier and the biomass enzyme.

[0024] Furthermore, the product reflux pipe is connected to the product outlet end through a product delivery pipe between the third valve and the product outlet end.

[0025] Furthermore, the main body of the reaction tank is cylindrical, and its top and bottom are both hemispherical; there is an openable and closable structure between the top and the main body to facilitate maintenance or replacement of components; the bottom is located in a protective support, and the supporting legs are provided at the bottom of the protective support.

[0026] Furthermore, the immobilization carrier is a hydrogel, which is a porous, highly water-absorbent material containing a large number of attachment sites and capable of immobilizing biomass enzymes. Of course, other types of immobilization carriers may also be used;

[0027] The biomass enzyme is a zinc-based metalloenzyme CA, which is usually found in mammals, plants, algae, archaea, vertebrates and bacteria in nature. It regulates the biological processes of humans and other organisms, and its most important function is to catalyze the reversible hydration reaction of CO2. The simple CO2 hydration process is very slow, with a first-order reaction rate constant of only 5×10 -2 s -1 , but CA converts CO2 into bicarbonate very quickly.

[0028] The advantages of the utility model are:

[0029] 1. The utility model improves the device for fixing and converting carbon dioxide by biomass enzymes, uses an immobilized carrier (such as hydrogel) to fix the biomass enzymes, and converts CO2 into bicarbonate through the biomass enzymes for reuse; the device uses multiple porous partitions to fix the carriers loaded with biomass enzymes. Enzyme immobilization can make the reaction tank design more flexible, while improving the recovery rate, stability and reusability of the enzymes, reducing the total cost of the enzymes, and is also beneficial to improving the rate and conversion rate of CO2 conversion to bicarbonate.

[0030] 2. The utility model introduces carbon dioxide evenly into the reaction tank through the carbon dioxide equalizer, so that the contact area between the gas, the liquid and the immobilized carrier becomes larger, which is beneficial to the reaction.

[0031] 3. In order to increase the concentration of bicarbonate, the utility model designs a purification unit, and uses a pump to further reflux the bicarbonate solution obtained by the reaction into the reaction tank for further reaction, thereby obtaining a bicarbonate solution with a higher concentration.

[0032] 4. The utility model has a simple structure, ingenious design, and is easy to manufacture. It can increase the contact area of ​​the reaction materials within the limited reaction tank space, ensure the stability of the biomass enzyme, and has a wide range of application scenarios. The service life of the immobilized enzyme is longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the structure of a biomass enzyme fixation and carbon dioxide conversion device of the utility model;

[0034] Figure 2 This is a schematic diagram of the cross-sectional structure of the reaction tank of the utility model;

[0035] Figure 3 This is a schematic diagram of the porous partition of the utility model;

[0036] Figure 4 This is a schematic diagram of the carbon dioxide equalizer of the present utility model.

[0037] The reference numerals are as follows:

[0038] 1-reaction tank, 2-storage tank, 3-pump, 4-second switch valve, 5-first switch valve, 6-third switch valve, 11-carbon dioxide inlet end, 12-porous partition, 121-upper partition, 122-buckle assembly, 123-lower partition, 124-first through hole, 125-second through hole, 126-third through hole, 13-carbon dioxide equalizer, 131-air outlet, 14-stirring unit, 141-transmission motor, 142-transmission shaft, 143-stirring paddle, 15-product outlet end, 16-product reflux inlet end, 17-liquid inlet end, 18-protective support, 19-carbon dioxide delivery pipe, 20-product reflux pipe, 21-product delivery pipe. DETAILED DESCRIPTION

[0039] The following is a further detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments:

[0040] Figure 1-Figure 4 As shown, a biomass enzyme fixed carbon dioxide conversion device includes a reaction tank, a fixed catalytic unit, a stirring unit, a purification unit and a storage tank.

[0041] The main body of the reaction tank is cylindrical, and its top and bottom are both hemispherical; the top and the main body are separated and can be opened and closed for easy maintenance and replacement of components; the bottom is located in a protective support with support legs. The reaction tank is used for fixed conversion reactions, and its top is provided with a carbon dioxide inlet, a liquid inlet, and a product reflux inlet; its bottom is provided with a product outlet, wherein a carbon dioxide delivery pipe that passes directly through the bottom of the reaction tank is installed at the carbon dioxide inlet; a carbon dioxide equalizer is also installed at the outlet of the carbon dioxide delivery pipe; the carbon dioxide equalizer is horizontally arranged near the bottom of the reaction tank, and includes a plurality of equalizer pipes; the plurality of equalizer pipes are evenly distributed radially around the central axis of the reaction tank, and each equalizer pipe is provided with a plurality of air outlets along the length direction, so that carbon dioxide gas can evenly enter the reaction tank and fully participate in the reaction.

[0042] The fixed catalytic unit includes a plurality of porous partitions spaced from top to bottom and adapted to be installed in the reaction tank through a snap assembly (four porous partitions are used in this embodiment, and the specific number can vary according to the size of the reaction tank), and the lowest porous partition is located above the carbon dioxide equalizer. Each porous partition includes an upper partition and a lower partition, and the two partitions are installed in coordination with each other to form a cavity capable of accommodating a hydrogel, and a large amount of zinc-based metalloenzymes are attached and fixed in the hydrogel (the zinc-based metalloenzyme solution can be fixed by soaking the hydrogel). A first through hole, a second through hole and a plurality of third through holes are correspondingly arranged on the upper partition and the lower partition; wherein the first through hole is coaxially arranged with the reaction tank to reserve a working space for the stirring unit; the second through hole is arranged corresponding to the carbon dioxide inlet end to reserve an installation space for the carbon dioxide delivery pipe; the third through hole is for water and carbon dioxide to fully contact with the biomass enzyme.

[0043] The stirring unit includes a transmission motor, a transmission shaft and a stirring paddle; the transmission motor is located at the top of the reaction tank; the transmission shaft is coaxially arranged in the reaction tank, the upper end of which is connected to the output shaft of the transmission motor, and the lower end of which is connected to the stirring paddle; the stirring paddle is located in the working space formed by the first through holes of each porous partition, and includes a plurality of vertically arranged stirring rods; the plurality of stirring rods are connected to the lower end of the transmission shaft through a cross beam and are evenly distributed on the same circumference.

[0044] The storage tank is connected with the product outlet through a product delivery pipe, on which a third switch valve is arranged.

[0045] The purification unit includes a product reflux pipe, and a first switch valve, a pump, and a second switch valve sequentially arranged on the product reflux pipe along the product reflux direction; wherein the inlet of the product reflux pipe is connected to the product outlet end through a product delivery pipe between the third valve and the product outlet end, and the outlet is connected to the product reflux inlet end;

[0046] The fixed conversion principle is as follows:

[0047] Water and CO2 react under the action of biomass enzymes to generate bicarbonate solution, which is further returned to the reaction tank through a pump for purification and then enters the storage tank, achieving the purpose of fixing, converting and storing carbon dioxide.

[0048] The working process is as follows:

[0049] The hydrogel with biomass enzyme fixed thereon is filled in the porous partition 12, and each porous partition 12 is installed inside the reaction tank 1 through the snap assembly, and then water is added to the reaction tank 1 from the liquid inlet end 17. CO2 gas enters the bottom of the reaction tank 1 through the carbon dioxide inlet end 11, the carbon dioxide delivery pipe 19 and the carbon dioxide equalizer 13 in sequence, and under the stirring action of the stirring unit 14, CO2 and water fully undergo hydration reaction under the action of the biomass enzyme (in this process, the first switch valve 5, the second switch valve 4, and the third switch valve 6 are all closed).

[0050] The first switch valve 5 and the second switch valve 4 are opened, and the liquid flowing out of the product outlet port 15 is refluxed into the reaction tank 1 through the product reflux inlet port 16 by the action of the pump 3 (then the first switch valve 5 and the second switch valve 4 are closed), and further hydration reaction occurs to increase the concentration of the bicarbonate solution. After the reaction is completed, the third switch valve 6 is opened, and the obtained bicarbonate solution is stored in the storage tank 2.

[0051] The above process completes a cycle of carbon dioxide fixation and conversion. The fixation and conversion of carbon dioxide can be achieved by repeating the above process.

[0052] The above description is only a specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present utility model, and these modifications or substitutions should be included in the protection scope of the present utility model.

Claims

1. A biomass enzyme fixation and carbon dioxide conversion device, characterized in that: It includes a reaction tank, a fixed catalytic unit, a stirring unit, a purification unit and a storage tank; The top of the reaction tank is provided with a carbon dioxide inlet, a liquid inlet and a product reflux inlet; the bottom is provided with support legs and a product outlet; wherein a carbon dioxide delivery pipe directly connected to the bottom of the reaction tank is installed at the carbon dioxide inlet; The fixed catalytic unit comprises a plurality of porous partitions which are arranged at intervals from top to bottom and are detachably adapted to be installed in the reaction tank; each porous partition comprises an upper partition and a lower partition, and the two partitions are installed in a vertically coordinated manner to form a cavity capable of accommodating an immobilized carrier, wherein the biomass enzyme is attached and fixed in the immobilized carrier; The upper and lower baffles are provided with a first through hole, a second through hole and a plurality of third through holes correspondingly; wherein the first through hole is coaxially arranged with the reaction tank to reserve a working space for the stirring unit; the second through hole is arranged corresponding to the carbon dioxide inlet end to reserve an installation space for the carbon dioxide delivery pipe; the third through hole is used to allow water and carbon dioxide to fully contact with the biomass enzyme; The stirring unit is installed on the top of the reaction tank, and its stirring end is located in the working space formed by the first through holes of each porous partition; The purification unit comprises a product reflux pipe, and a first switch valve, a pump, and a second switch valve sequentially arranged on the product reflux pipe along the product reflux direction; wherein the inlet of the product reflux pipe is connected to the product outlet end, and the outlet is connected to the product reflux inlet end; The storage tank is connected to the product outlet through a product delivery pipe, on which a third switch valve is arranged.

2. The biomass enzyme fixation and carbon dioxide conversion device according to claim 1, characterized in that: A carbon dioxide equalizer is installed at the outlet of the carbon dioxide delivery pipe; The carbon dioxide distributor is horizontally arranged below the fixed catalytic unit, and includes a plurality of distributors; the plurality of distributors are evenly distributed radially around the central axis of the reaction tank, and each distributor is provided with a plurality of air outlets along the length direction.

3. The biomass enzyme fixation and carbon dioxide conversion device according to claim 1 or 2, characterized in that: The stirring unit includes a transmission motor, a transmission shaft and a stirring paddle; The transmission motor is located at the top of the reaction tank; The transmission shaft is coaxially arranged in the reaction tank, the upper end of which is connected to the output shaft of the transmission motor, and the lower end of which is connected to the stirring paddle; The stirring paddle comprises a plurality of vertically arranged stirring rods; the plurality of stirring rods are connected to the lower end of the transmission shaft through a crossbeam and are evenly distributed on the same circumference.

4. The biomass enzyme fixation and carbon dioxide conversion device according to claim 3, characterized in that: The porous partition is installed in the reaction tank through a snap assembly.

5. The biomass enzyme fixation and carbon dioxide conversion device according to claim 4, characterized in that: The product reflux pipe is communicated with the product outlet end through the product delivery pipe between the third valve and the product outlet end.

6. The device for biomass enzyme fixation and conversion of carbon dioxide according to claim 5, characterized in that: The main body of the reaction tank is cylindrical, and its top and bottom are both hemispherical. The bottom is located in the protective support, and the supporting legs are arranged at the bottom of the protective support.

7. The device for biomass enzyme fixation and conversion of carbon dioxide according to claim 6, characterized in that: The immobilization carrier is a hydrogel; The biomass enzyme is a zinc-based metal enzyme.

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