Plant absorption liquid for absorbing CO2 as well as preparation method and application of plant absorption liquid

Abstract

The invention discloses plant absorption liquid for absorbing CO2 as well as a preparation method and application of the plant absorption liquid. The invention relates to the technical field of pollutant purification. The plant absorption liquid comprises a plant extracting solution and a chemical reagent; the plant extracting solution comprises the following components in parts by weight: 3-15 parts of an acorn branch and leaf extracting solution, 10-30 parts of a manna leaf extracting solution, 5-30 parts of an artemisia apiacea branch and leaf extracting solution, 5-10 parts of a clover extracting solution and 15-25 parts of a cypress branch and leaf extracting solution; the chemical reagent comprises magnesium hydroxide or magnesium oxide, zeolite, carbon powder and potassium hydroxide; the mass ratio of the plant extracting solution to the chemical reagent is 100: (38-60). The CO2 absorption liquid provided by the invention has a relatively good absorption effect on CO2, the absorption amount of CO2 in the CO2 absorption liquid can reach 5.0-12.0 L (CO2) / 100g (CO2 absorption liquid), and the CO2 absorption liquid also has the characteristics of low cost, low energy consumption, high safety, convenience in use and the like. In addition, the invention further provides the CO2 absorption liquid capable of being recycled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pollutant purification. More particularly, it relates to a plant absorption liquid for absorbing CO2 and a preparation method and application thereof. BACKGROUND

[0002] According to the information released by the International Energy Agency, global energy-related carbon dioxide emissions reached 37.4 billion tons in 2023, and carbon dioxide emissions have been increasing in the past two years. With the continuous advancement of industrialization, carbon dioxide emissions have become a global concern and are subject to strict regulation.

[0003] The current industrial emission reduction technology mainly adopts carbon capture and utilization storage (CUSS) technology, and the CO2 capture method is divided into three types: pre-combustion, post-combustion and oxygen-enriched combustion. The most commonly used method in post-combustion CO2 capture is absorption, which has an absorption tower and a desorption tower. After desulfurization and denitrification, the flue gas enters the absorption tower from the bottom through the induced draft fan, and the absorption liquid is sprayed from the top of the absorption tower. The flue gas and the absorption liquid react after being contacted in the absorption tower, and the absorption liquid absorbs CO2 in the flue gas to become a rich liquid containing a large amount of CO2. The rich liquid is pumped to the desorption tower, heated to 100-120℃ by a reboiler in the desorption tower, and the CO2 absorbed in the flue gas is released by decomposing the rich liquid. Finally, carbon dioxide is separated and recovered. Therefore, the performance of the absorbent is the key to capturing CO2. Common chemical absorbents include amine compounds and hot potassium base solutions. The advantage of chemical absorption is good selectivity, which can efficiently capture carbon dioxide from complex mixed gases, has absorption effect on low-concentration carbon dioxide, and has relatively low cost compared with other methods. However, the existing chemical absorption method still has problems such as low carbon dioxide absorption capacity, poor environmental protection, easy degradation of absorbent, serious side reactions, and high energy consumption during desorption. Therefore, developing a new type of absorbent with high CO2 absorption capacity, low regeneration consumption, non-toxicity, low corrosion, low cost and large-scale application in industrial production has become the key to solving the current carbon dioxide problem. SUMMARY

[0004] Based on the above defects, the first object of the present application is to provide a plant absorption liquid for absorbing CO2. The plant absorption liquid provided by the present application has good absorption effect on CO2, and the absorption amount of CO2 in the CO2 absorption liquid can reach 5.0-12.0L (CO2) / 100g (CO2 absorption liquid). In addition, it also has the characteristics of low cost, low energy consumption, high safety and convenient use.

[0005] The second object of the present application is to provide a preparation method of the plant absorption liquid for absorbing CO2 as described above.

[0006] The third object of the present application is to provide a plant absorption liquid for absorbing CO2 which can be recycled. By improving the formula of the previous CO2 absorption liquid, a recycled absorption liquid which can absorb and desorb CO2 is obtained, and the energy consumption in the desorption process is reduced by more than 30%, realizing a CO2 recycling capture-separation-capture system and further reducing the cost.

[0007] The fourth object of the present application is to provide a preparation method of the plant absorption liquid for absorbing CO2 which can be recycled as described above.

[0008] The fifth object of the present application is to provide a biochemical cleaning liquid containing the plant absorption liquid for absorbing CO2 as described above.

[0009] The sixth object of the present application is to provide a biochemical cleaning liquid containing the plant absorption liquid for absorbing CO2 which can be recycled as described above.

[0010] The seventh object of the present application is to provide a CO2 cleaning device containing the biochemical cleaning liquid as described above.

[0011] To achieve the first object described above, the present application adopts the following technical solution: The present application discloses a plant absorption liquid for absorbing CO2, which comprises a plant extraction liquid and a chemical reagent. The plant extraction liquid comprises acorn branch and leaf extraction liquid 3-15 parts, mannose leaf extraction liquid 10-30 parts, artemisia branch and leaf extraction liquid 5-30 parts, clover extraction liquid 5-10 parts, and cypress branch and leaf extraction liquid 15-25 parts, by weight. The chemical reagent comprises magnesium hydroxide or magnesium oxide, zeolite, carbon powder, and potassium hydroxide. The mass ratio of the plant extraction liquid to the chemical reagent is 100:38-60.

[0012] Further, the chemical reagent comprises 10-15 parts of magnesium hydroxide or magnesium oxide, 3-5 parts of zeolite, 5-10 parts of carbon powder, and 20-30 parts of potassium hydroxide, by weight.

[0013] To achieve the second object described above, the present application adopts the following technical solution: The present application discloses a preparation method of the plant absorption liquid for absorbing CO2 as described above, which comprises the following steps: 1) grinding each plant material, and adding the ground plant material into water and heating to extract, wherein the amount of water added is calculated based on 100-2000 parts by weight (preferably 100-500 parts by weight) of water per 100 parts by weight of plant material, and after the heating extraction is completed, the mixture is soaked for 10-24 hours, filtered to obtain the supernatant, and mixed to obtain a plant extract; 2) adding each chemical reagent into the plant extract, wherein 3-5 parts by weight of zeolite, 5-10 parts by weight of carbon powder, 20-30 parts by weight of potassium hydroxide, and 10-15 parts by weight of magnesium hydroxide or magnesium oxide are added per 100 parts by weight of plant extract, to obtain the CO2 absorption liquid.

[0014] Further, the heating extraction temperature is 100-120℃, and the heating extraction time is 0.5-2 hours.

[0015] Further, the grinding is to cut each plant material into small pieces or segments of 1-2 cm in length after washing, and then soak in water for more than 10 hours, and then grind into a slurry.

[0016] To achieve the third object, the application adopts the following technical solution: The application discloses a plant absorption liquid for absorbing CO2, which can be recycled, comprising a plant extract and a chemical reagent. The plant extract comprises acorn branch and leaf extract 3-15 parts, mannose leaf extract 10-30 parts, artemisia annua branch and leaf extract 5-30 parts, clover extract 5-10 parts, and cypress branch and leaf extract 15-25 parts. The chemical reagent comprises monoethanolamine. The mass ratio of the plant extract to the chemical reagent is 100:20-40.

[0017] By adjusting the chemical reagent, the cycle operation of CO2 capture-separation-capture can be realized, and since the plant extract formula which has a major absorption effect on CO2 is not changed, the CO2 absorption liquid not only ensures high CO2 absorption, but also further reduces the loss of the CO2 absorption liquid and the cost.

[0018] Further, the chemical reagent is 20-30 parts by weight of monoethanolamine.

[0019] To achieve the fourth object, the application adopts the following technical solution: The application discloses a preparation method of the plant absorption liquid for absorbing CO2, which can be recycled, as described above, comprising the following steps: 1) grinding each plant material, and adding the ground plant material to water and heating to extract, wherein the amount of water added is calculated based on 100-2000 parts by weight (preferably 100-500 parts by weight) of water per 100 parts by weight of plant material, and after the heating extraction is completed, the mixture is soaked for 10-24 hours, filtered to obtain the supernatant, and mixed to obtain a plant extract; 2) adding each chemical reagent to the plant extract, wherein 20-40 parts by weight of monoethanolamine is added per 100 parts by weight of plant extract, to obtain the product.

[0020] Further, the heating extraction temperature is 100-120°C, and the heating extraction time is 0.5-2 hours.

[0021] Further, the grinding is to cut each plant material after washing into small pieces or segments of 1-2 centimeters in length, and then soak in water for more than 10 hours, and after taking out, grind into a slurry.

[0022] To achieve the fifth object, the present application adopts the following technical solutions: The present application discloses a kind of biochemical cleaning liquid, including the plant absorption liquid for absorbing CO2 as described above.

[0023] To achieve the sixth object, the present application adopts the following technical solutions: The present application discloses a kind of biochemical cleaning liquid, including the plant absorption liquid for absorbing CO2 as described above.

[0024] To achieve the seventh object, the present application adopts the following technical solutions: The present application discloses a kind of CO2 cleaning device comprising the biochemical cleaning liquid as described above.

[0025] The present application has the following advantages: The present application discloses a kind of plant absorption liquid for absorbing CO2 and its preparation method and application.Compared with prior art, the technical solutions of the present application have at least the following advantages: (1) the present application selects safe and environmentally friendly plant extract as the main component of CO2 absorption, which is low in cost and high in safety, and can efficiently absorb CO2 by cooperating with common chemical reagents (such as zeolite, carbon powder, potassium hydroxide and magnesium hydroxide or magnesium oxide), the absorption amount of CO2 in CO2 absorption liquid is 5.0-12.0L (CO2) / 100g (CO2 absorption liquid). This absorbent can be used for simple CO2 absorption, without CO2 separation, so there is no need to set up a desorption tower in the process, thus saving equipment investment and reducing energy consumption.

[0026] (2) In order to expand the application of the CO2 absorption liquid, the chemical reagent is further adjusted, and monoethanolamine is used as the chemical reagent to combine with the plant extract liquid, so that the cycle operation of CO2 capture-separation-capture can be realized. The experimental results show that the absorption amount of CO2 in the recyclable CO2 absorption liquid is 5.0-12.0L(CO2) / 100g(CO2 absorption liquid), the absorption and desorption rate is 94%, the desorption tower bottom temperature is 95-98℃, the average power consumption is 1.5kW·h, and the CO2 absorption and desorption rate is high. Therefore, the CO2 absorption liquid not only ensures the high absorption of CO2, but also reduces the cost. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the present application, the present application will be further described below in conjunction with preferred embodiments. It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] Unless otherwise specified, the raw materials and reagents used in the following examples are commercially available or can be prepared by known methods.

[0029] Example 1 The branches and leaves of oak are washed, cut into small pieces or segments of 1-2 centimeters long, and then soaked in 20 times the mass of the branches and leaves of oak in water for 12 hours. After being taken out, the branches and leaves of oak are ground into a mud-like slurry, and then put back into the original soaking water. The temperature is heated to 100-120℃, and heated for 1 hour. After the fire is turned off, the branches and leaves of oak are soaked for more than 10 hours, so that the contents of plant cells are fully released. The supernatant is extracted to obtain the extract of branches and leaves of oak. The extract of branches and leaves of oak, the extract of leaves of mannose, the extract of branches and leaves of artemisia, the extract of clover, and the extract of branches and leaves of cypress are obtained by the above method. The above extract is mixed according to the mass ratio of 1:3:3:1:2, that is, the plant extract liquid I.

[0030] In 100g of the plant extract liquid I, 5g of zeolite, 5g of carbon powder, 30g of potassium hydroxide and 15g of magnesium hydroxide are added. After being mixed uniformly, the CO2 absorption liquid is obtained.

[0031] Example 2 The preparation method of the plant extract liquid I is the same as that of Example 1.

[0032] According to the amount of 5g of zeolite, 5g of carbon powder, 20g of potassium hydroxide and 15g of magnesium hydroxide per 100g of plant extract liquid, the above chemical reagent is added, and the CO2 absorption liquid is obtained after being mixed uniformly.

[0033] Example 3 The plant extract I was prepared according to the method of Example 1.

[0034] The above chemicals were added in the amount of 20 g of potassium hydroxide and 5 g of magnesium hydroxide per 100 g of the plant extract, and the CO2 absorbing solution was obtained after mixing.

[0035] Comparative Example 1 The above chemicals were added in the amount of 5 g of zeolite, 5 g of carbon powder, 30 g of potassium hydroxide and 15 g of magnesium hydroxide per 100 g of water, and the CO2 absorbing solution was obtained after mixing.

[0036] Comparative Example 2 The acorn branch leaf extract, the maple leaf extract and the clover extract were prepared according to the method of Example 1, and the plant extract control I was obtained by mixing the acorn branch leaf extract, the maple leaf extract and the clover extract in the mass ratio of 1:3:1.

[0037] The above chemicals were added in the amount of 5 g of zeolite, 5 g of carbon powder, 30 g of potassium hydroxide and 15 g of magnesium hydroxide per 100 g of the plant extract control I, and the CO2 absorbing solution was obtained after mixing.

[0038] Example 4 The plant extract I was prepared according to the method of Example 1.

[0039] The above chemicals were added in the amount of 30 g of monoethanolamine per 100 g of the plant extract, and the CO2 absorbing solution was obtained after mixing.

[0040] Example 5 The acorn branch leaves were washed, cut into small pieces or segments of 1-2 cm in length, soaked in 15 times the mass of the acorn branch leaves in water for 12 h, taken out, ground into a slurry, and then put back into the original soaking water, heated to 100-120°C, heated for 1 h, and then soaked for more than 10 h after the fire was turned off, so that the contents of the plant cells were fully released, the supernatant was extracted, and the acorn branch leaf extract was obtained. The maple leaf extract, the artemisia branch leaf extract, the clover extract and the cypress branch leaf extract were obtained according to the above method, and the plant extract II was obtained by mixing the acorn branch leaf extract, the maple leaf extract, the artemisia branch leaf extract, the clover extract and the cypress branch leaf extract in the mass ratio of 1:3:3:1:2.

[0041] The above chemicals were added in the amount of 30 g of monoethanolamine per 100 g of the plant extract II, and the CO2 absorbing solution was obtained after mixing.

[0042] Example 6 The acorn tree branches and leaves are washed, cut into 1-2 cm long pieces or segments, then soaked in 10 times the mass of the acorn tree branches and leaves of water for 12 hours, then ground into a slurry, then placed back into the original soaking water, heated to 100-120°C, heated for 1 hour, then soaked for 10 hours after the fire is turned off, so that the plant cell contents are fully released, then the supernatant is extracted, to obtain the acorn tree branch and leaf extract, and the above-mentioned methods are used to obtain the leaf extract of mannose, the branch and leaf extract of artemisia, the clover extract, and the branch and leaf extract of cypress, respectively, and the above-mentioned extracts are mixed in a mass ratio of 1:3:3:1:2 of the acorn tree branch and leaf extract, the leaf extract of mannose, the branch and leaf extract of artemisia, the clover extract, and the branch and leaf extract of cypress, to obtain the plant extract III.

[0043] The above-mentioned chemical reagents are added in an amount of 30g of monoethanolamine per 100g of plant extract III, and the CO2 absorption liquid is obtained after mixing.

[0044] Example 7 The acorn tree branches and leaves are washed, cut into 1-2 cm long pieces or segments, then soaked in 5 times the mass of the acorn tree branches and leaves of water for 12 hours, then ground into a slurry, then placed back into the original soaking water, heated to 100-120°C, heated for 1 hour, then soaked for 10 hours after the fire is turned off, so that the plant cell contents are fully released, then the supernatant is extracted, to obtain the acorn tree branch and leaf extract, and the above-mentioned methods are used to obtain the leaf extract of mannose, the branch and leaf extract of artemisia, the clover extract, and the branch and leaf extract of cypress, respectively, and the above-mentioned extracts are mixed in a mass ratio of 1:3:3:1:2 of the acorn tree branch and leaf extract, the leaf extract of mannose, the branch and leaf extract of artemisia, the clover extract, and the branch and leaf extract of cypress, to obtain the plant extract IV.

[0045] The above-mentioned chemical reagents are added in an amount of 30g of monoethanolamine per 100g of plant extract IV, and the CO2 absorption liquid is obtained after mixing.

[0046] Verification test The test information is as follows: I. Determination of CO2 absorption capacity 1. Main equipment used in the test process: 250ml three-necked flask; Oil bath pot; Matching condenser tube, cold water circulating pump; Gas metering-mass flow meter controller (MFC); Gas metering-wet type flow meter (automatic counting).

[0047] 2. Test conditions: The CO2 absorption liquid to be tested is 100 grams, the CO2 input speed is 150 milliliters per minute, the input CO2 concentration is 99.90%, the absorption time is 100-120 minutes, and the correction coefficient is 1.079.

[0048] 3. Test method: The CO2 absorption liquid to be tested is 100 grams, the CO2 input speed is 150 milliliters per minute, the input CO2 concentration is 99.90%, the absorption time is 100-120 minutes, and the correction coefficient is 1.079.

[0049] 4. Test record data and processing: The data that can be recorded include the gas input amount (controlled by a mass flow meter), the gas output amount (read by a wet flow meter), and the CO2 absorption liquid temperature change (detected by a temperature measuring couple).

[0050] CO2 absorption amount = CO2 input speed * time * calibration coefficient - gas output amount (flow meter reading) 5. Test results: The results are shown in Tables 1 and 2.

[0051] Table 1

[0052] Note: In the experiment of Comparative Example 1, crystalline bodies were formed, blocking the experiment.

[0053] Conclusion: From the comparison of Example 1 and Example 2, it is found that in the same plant extract liquid, different chemical reagents have different CO2 absorption amounts. When the chemical reagents include magnesium hydroxide or magnesium oxide, as well as zeolite, carbon powder and potassium hydroxide, the effect of absorbing carbon dioxide is better. From Comparative Example 1, it is known that under the same conditions, the chemical reagents mixed in water easily form carbonate crystals, blocking the pipeline and making the experiment impossible. Later, mass spectrometric analysis was performed on the plant extract liquid I, and it was found that it contains isophorone, acetaminophen, lauryl amide propyl amine oxide and complex terpene glycoside derivatives and other components. These components can have organic reactions with CO2, and the absorption method is completely different from the dissolution of alkaline substances in water, further proving the effect of the plant extract liquid.

[0054] From the comparison of Example 1 and Comparative Example 2, it is found that the CO2 absorption amount is different when the plant extract solution combination is different and the chemical reagent is the same. When the plant extract solution is prepared according to specific proportions from acorn branch and leaf extract solution, mannose leaf extract solution, artemisia branch and leaf extract solution, clover extract solution and cypress branch and leaf extract solution, the effect of absorbing carbon dioxide is better.

[0055] Table 2

[0056] Conclusion: When the plant extract solution is the same, the higher the concentration of the chemical reagent within a certain range, the higher the CO2 absorption amount; When the chemical reagent is the same, the higher the concentration of the plant extract solution within a certain range, the higher the CO2 absorption amount.

[0057] II. Continuous absorption and desorption experiment Introduction of experimental equipment: 1. CO2 chemical absorption and desorption continuous testing device 1.1 Main components of experimental system The experimental platform occupies an area of 3.3 m2and has a total height of 2.2 m. 2 .

[0058] The whole system includes an absorption tower and a desorption tower.

[0059] Public utilities include 2 cold water circulating machines and 1 heat conducting oil heating circulating machine.

[0060] The control system is PLC control, which automatically collects parameters such as temperature, pressure and circulation amount.

[0061] 1.2 Experimental process CO2 gas enters the absorption tower through a gas flow meter, and is in counter- contact with the absorbent (i.e. the CO2 absorption liquid of Example 4) in the absorption tower. After decarburization, it is discharged into the atmosphere through a separator. The CO2-rich absorbent solution flows out from the bottom of the absorption tower, is heated by a heat exchanger and then sent to the desorption tower. Under the action of heat provided by the heat conducting oil, the absorbent solution undergoes a reversible reaction and releases carbon dioxide gas, which is discharged through a gas flow meter, and then becomes an absorbent lean solution. The absorbent lean solution is cooled by a heat exchanger and a cooler and then sent back to the top of the absorption tower, so as to realize the regeneration and recycling of the absorbent.

[0062] 2. Specific testing method 2.1 Solution preparation and gas The absorbent solution of Example 4 is used in an amount of 15 L.

[0063] Gas: CO2 content 99.9%, gas inlet speed: 3 L / min.

[0064] 2.2 Solution cold cycle Close the absorption tower bottom rich liquid outlet valve, and open the buffer tank.

[0065] Pour the absorption liquid into the buffer tank, open the buffer tank outlet valve, and open the rich liquid pump to charge the absorption liquid to the desorption tower.

[0066] When the absorption liquid level in the desorption tower exceeds the heating coil, open the lean liquid pump to charge the absorption liquid into the absorption tower through the lean liquid pump.

[0067] When the absorption liquid level in the absorption tower rises to the middle sight glass, open the absorption tower rich liquid valve and close the buffer tank outlet valve, so that the absorption liquid circulates in the absorption tower and desorption tower through the lean liquid pump and rich liquid pump.

[0068] Adjust the lean liquid pump and rich liquid pump continuously during the circulation process until the liquid levels in the absorption tower and desorption tower tend to be stable.

[0069] 2.3 Hot start Start two cold water circulating machines and start the heat conducting oil circulating machine, heat the absorption liquid in the desorption tower with heat conducting oil until the desorption temperature or test temperature is reached.

[0070] Start the inlet flowmeter controller and introduce CO2 gas (99.9%) into the CO2 capture system.

[0071] 2.4 Working condition adjustment When the desorption tower starts to regenerate CO2, it means that the system circulation has started.

[0072] Adjust the desorption tower bottom temperature by changing the set temperature of the heat conducting oil.

[0073] Use circulating cooling water to ensure cooling effect.

[0074] The CO2 content is controlled by the mass flowmeter.

[0075] 2.5 Test data recording When the CO2 absorption and desorption efficiency reaches more than 90%, the solution inlet and outlet flow is balanced, the regenerated CO2 amount is stable for 60 min, and the system temperature changes smoothly, it is considered that the working condition is stable, the running data is recorded, and the power consumption is counted by the electric meter.

[0076] 3 Experimental results 3.1 Data collection The running time is the cumulative system time, record the data, h; The inlet gas flow is the gas flowmeter display data at the inlet, record the data, L; The desorption gas flow is the gas flowmeter display data at the outlet, record the data, L; The absorption and desorption rate is the ratio of the desorption gas amount to the gas inlet amount, and the data is calculated. The desorption temperature is the data displayed by the desorption tower bottom temperature meter, and the data is recorded, in ℃. The total power consumption is the heating consumed electric power, and the data is recorded, in kW·h. The average power consumption is the heating consumed electric power per hour, and the data is calculated, in kW·h.

[0077] 3.2 Results The results are shown in Table 3.

[0078] Table 3

[0079] Conclusion: The CO2 plant absorption liquid has a CO2 absorption and desorption efficiency of more than 94% and good stability in 102 hours of operation, and the average power consumption is 1.5 kW·h.

[0080] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description, and all the embodiments cannot be exhausted here. Any obvious changes or variations derived from the technical solutions of the present application are still within the protection scope of the present application.

Claims

1. A plant absorption liquid for absorbing CO2, characterized by, The plant extraction liquid and the chemical reagent; The plant extraction liquid comprises acorn branch and leaf extraction liquid 3-15 parts, mannose leaf extraction liquid 10-30 parts, artemisia annua branch and leaf extraction liquid 5-30 parts, clover extraction liquid 5-10 parts, and cypress branch and leaf extraction liquid 15-25 parts by weight fraction; The chemical reagent comprises magnesium hydroxide or magnesium oxide, zeolite, carbon powder, and potassium hydroxide; The mass ratio of the plant extraction liquid to the chemical reagent is 100:38-60.

2. The plant absorption solution for absorbing CO2 according to claim 1, characterized by, The chemical reagent comprises 10-15 parts of magnesium hydroxide or magnesium oxide, 3-5 parts of zeolite, 5-10 parts of carbon powder, and 20-30 parts of potassium hydroxide by weight fraction.

3. The method for preparing a plant absorption liquid for absorbing CO2 according to claim 1 or 2, characterized by, The method comprises the following steps: 1) grinding and crushing each plant raw material, adding the crushed plant raw material into water and heating extraction, wherein the water addition amount is calculated according to 100-2000 parts by weight of water per 100 parts by weight of the plant raw material, and after the heating extraction is completed, the mixture is soaked for 10-24 hours, filtered to obtain the supernatant, and then mixed to obtain the plant extraction liquid; 2) adding each chemical reagent into the plant extraction liquid, wherein 3-5 parts of zeolite, 5-10 parts of carbon powder, 20-30 parts of potassium hydroxide, and 10-15 parts of magnesium hydroxide or magnesium oxide are added per 100 parts by weight of the plant extraction liquid.

4. The production method according to claim 3, characterized by, The heating extraction temperature is 100-120°C, and the heating extraction time is 0.5-2 hours.

5. A plant absorption liquid for absorbing CO2, characterized by, The plant extraction liquid and the chemical reagent; The plant extraction liquid comprises acorn branch and leaf extraction liquid 3-15 parts, mannose leaf extraction liquid 10-30 parts, artemisia annua branch and leaf extraction liquid 5-30 parts, clover extraction liquid 5-10 parts, and cypress branch and leaf extraction liquid 15-25 parts by weight fraction; The chemical reagent comprises monoethanolamine; The mass ratio of the plant extraction liquid to the chemical reagent is 100:20-40.

6. The method for preparing a plant absorption solution for absorbing CO2 according to claim 5, wherein The method comprises the following steps: 1) grinding and crushing each plant raw material, adding the crushed plant raw material into water and heating extraction, wherein the water addition amount is calculated according to 100-2000 parts by weight of water per 100 parts by weight of the plant raw material, and after the heating extraction is completed, the mixture is soaked for 10-24 hours, filtered to obtain the supernatant, and then mixed to obtain the plant extraction liquid; 2) adding each chemical reagent into the plant extraction liquid, wherein 20-40 parts of monoethanolamine are added per 100 parts by weight of the plant extraction liquid.

7. The production method according to claim 6, wherein The heating extraction temperature is 100-120°C, and the heating extraction time is 0.5-2 hours.

8. A biochemical scavenger solution, characterized in that, The plant absorption liquid for absorbing CO2 comprises the plant absorption liquid for absorbing CO2 according to claim 1 or 2.

9. A biochemical scavenging fluid, characterized in that, The plant absorption liquid for absorbing CO2 comprises the plant absorption liquid for absorbing CO2 according to claim 5.

10. A CO2 removal device, characterized by The bio-chemical cleaning liquid comprises the bio-chemical cleaning liquid according to claim 8 or 9.

Images