CN113020247A - Granulating process of contaminated soil remediation conditioner - Google Patents
Granulating process of contaminated soil remediation conditioner Download PDFInfo
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- CN113020247A CN113020247A CN202110432399.0A CN202110432399A CN113020247A CN 113020247 A CN113020247 A CN 113020247A CN 202110432399 A CN202110432399 A CN 202110432399A CN 113020247 A CN113020247 A CN 113020247A
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- 239000002689 soil Substances 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000008569 process Effects 0.000 title claims abstract description 32
- 238000005067 remediation Methods 0.000 title claims description 51
- 239000010902 straw Substances 0.000 claims abstract description 74
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000005469 granulation Methods 0.000 claims abstract description 32
- 230000003179 granulation Effects 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000292 calcium oxide Substances 0.000 claims abstract description 20
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 229910052588 hydroxylapatite Inorganic materials 0.000 claims abstract description 8
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 20
- 239000011812 mixed powder Substances 0.000 claims description 18
- 235000007164 Oryza sativa Nutrition 0.000 claims description 16
- 235000009566 rice Nutrition 0.000 claims description 16
- 241000209140 Triticum Species 0.000 claims description 10
- 235000021307 Triticum Nutrition 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 229910021536 Zeolite Inorganic materials 0.000 claims description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 4
- 239000010457 zeolite Substances 0.000 claims description 4
- 240000008042 Zea mays Species 0.000 claims description 3
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 3
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 3
- 235000005822 corn Nutrition 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000009736 wetting Methods 0.000 claims description 2
- 239000005909 Kieselgur Substances 0.000 claims 1
- 240000007594 Oryza sativa Species 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- -1 biochar Chemical compound 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 241000209094 Oryza Species 0.000 description 15
- 239000000126 substance Substances 0.000 description 7
- 229910001385 heavy metal Inorganic materials 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
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- 239000002154 agricultural waste Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
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- 238000006243 chemical reaction Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
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- 239000000047 product Substances 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 3
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- 229910000514 dolomite Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
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- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 235000013339 cereals Nutrition 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a granulating process of a contaminated soil restoration conditioner, which takes hydroxyapatite, biochar, diatomite, nano iron powder and quicklime as granulating raw materials, and is granulated together with crushed straws, the water content characteristic of the straws is utilized to replace the traditional water so as to provide the water required during granulation, and the soil restoration conditioner is prepared and used for treating the contaminated soil. The method has the advantages of waste control by waste, simple process flow, environmental protection, economy, high universality, low cost, good granulation effect, large-scale popularization and good economic and social benefits.
Description
Technical Field
The invention relates to the technical field of soil conditioners for repairing polluted soil, in particular to a granulation process of a polluted soil repairing conditioner.
Background
Due to the rapid increase of population and the rapid development of industry, solid wastes are continuously piled and dumped to the surface of soil, harmful wastewater continuously permeates into the soil, and harmful gas and floating dust in the atmosphere continuously fall into the soil along with rainwater and are accumulated in the soil, thereby further causing soil pollution. Furthermore, with the rapid development of agriculture in China, the excessive use of chemical fertilizers and the increase of cultivation period, the problem of soil quality degradation is increasingly serious, and the use of soil restoration conditioners instead of traditional fertilizers becomes a hotspot. The soil restoration conditioner is used as a novel functional restoration material and has the characteristics of adsorbing and passivating pollutants, being environment-friendly, retaining water, increasing fertilizer and ventilating, and being pollution-free and pollution-free.
The existing soil restoration conditioner generally takes natural minerals (dolomite, limestone and potassium-containing shale) or other organic matters as main raw materials, and a large amount of water wetting materials are added in the process of agglomeration, and then the mixture is granulated to form a product. Because the material generally contains a large amount of quicklime, the soil remediation conditioner is formed by heat release when meeting water. However, the water content is too high, the temperature can reach 700 ℃ during heat release, the structure of the material is easy to damage, the duration is short, and the curing molding is not thorough. For the soil remediation conditioner which does not contain self-exothermic materials such as quicklime and the like, the soil remediation conditioner is usually formed by adopting pellet equipment, the process flow is complex, and the consumption cost is high.
The straws are common agricultural wastes, generally directly burn in the field, cause air pollution or are piled up in situ to occupy the farming area; but it also contains rich water, and has the functions of reducing soil water evaporation and maintaining water storage capacity of the plough layer. Therefore, the method combines soil remediation and conditioning and straw returning to fields, treats waste with waste, and has great significance for agricultural development.
Disclosure of Invention
Aiming at the technical problems, the invention provides a granulation process of a contaminated soil remediation conditioner, which uses waste straws to replace the traditional water to provide water required by granulation, and has the advantages of treating waste by waste, simple process flow, environmental protection, economy, high universality, low cost and good granulation effect.
The technical scheme of the invention is as follows:
a granulation process of a contaminated soil remediation conditioner comprises the following steps:
s1, stirring and mixing the main material and the auxiliary material to obtain mixed powder;
s2, crushing straws, and placing the mixed powder obtained in the step S1 and the crushed straws into a crushing granulator for granulation to obtain the granular soil remediation conditioner.
The working principle of the technical scheme is as follows:
the polluted soil restoration conditioner is a powdery substance which is generally prepared by calcining natural mineral substances (dolomite, limestone and potassium-containing shale) or other organic substances serving as main raw materials at high temperature. The main component of the quicklime is CaO, which can release heat to generate Ca (OH) when meeting water2And the temperature in the reaction process can reach the calcining temperature in the preparation process of the soil remediation conditioner, so the method utilizes the self-heating property of the quicklime and simplifies the process technology.
The straws are common agricultural wastes, contain rich water, have the humidity as high as 80 percent, can release a large amount of heat when being contacted with a mixture containing quicklime, and the generated temperature ensures that the soil remediation conditioner is sintered and molded and simultaneously promotes the straws to be carbonized and decomposed, so that the straws are returned to the field without secondary pollution. The powder after straw carbonization has adhesive property after absorbing moisture, and is beneficial to solidification and molding of the conditioner in the granulating process.
In a further technical scheme, the main material in the step S1 is a raw material mixture formed by mixing hydroxyapatite, zeolite, diatomite, activated carbon and nano iron powder according to a preset mass ratio; the auxiliary material is quicklime.
The soil restoration conditioner prepared by the raw materials has strong ion exchangeability and high adsorption performance, and quicklime can improve the pH value of soil, change the valence state of heavy metal in the soil, form a complex with the heavy metal ions to lose bioactivity, and effectively improve the soil.
In a further technical scheme, the straws crushed in the step S2 are wheat straws, rice straws, rape straws or corn straws.
The plants in China mainly comprise wheat, rice, corn and rape, the production area is large, a large amount of surplus straws are produced after harvesting, the crop yield is increased by more than 10% after straw returning is carried out, and the economic benefit of farmers can be increased.
In a further technical scheme, in the step S2, the average humidity value of the straw to be crushed is 50-85%.
By the inventor's field test, the moisture content was tested on the crop within 30 days after harvest using a moisture tester, in which the rape straw moisture was compared to the lowest, with an average moisture value of 63.96%. Wherein the humidity of the rice straw is highest, and the average humidity value is as high as 80.74%. The experiment is also suitable for other crop straws, so that the humidity value is 50-85%, and the granulation object is wider.
In a further technical scheme, when the average humidity value of the straws to be crushed is lower than 50%, the mixed powder and the crushed straws are placed in a crushing granulator, and water accounting for 2-10% of the mass of the mixed powder is added.
For the long-time waste straws, the humidity is too low through sunlight irradiation, the water is not enough, and proper water can be added to ensure that the waste straws are completely carbonized. Under the condition, the straws can be returned to the field, the used water amount is far lower than that of the prior art, the cost is lower, the added water is higher when the humidity is lower, and the technical problem of difficult straw recovery can be further solved by controlling the water amount to be 2-10% of the mass of the mixed powder.
In a further technical scheme, the mass ratio of the mixed powder to the straws is 1: 2-10.
The humidity is inconsistent due to factors such as straw type and cultivated land type, the heat release temperature of the soil restoration conditioner for solidification and molding can be reached when the mass ratio of the straw with high humidity is 1:2, the mass ratio can be properly increased when the straw with low humidity is used, sufficient moisture in the granulation process is ensured, and the molding quantity of soil restoration conditioner particles is increased. Therefore, the control ratio of 1:2-10 is a suitable technical parameter.
In a further technical scheme, the granular soil remediation conditioner prepared in the step S2 is a wet soil remediation conditioner or a set soil remediation conditioner.
The humidity and therefore the water content vary. Preferably, the soil remediation conditioner is just solidified and formed in some reaction processes, and can be directly granulated. For another example, the amount of water added was not easily controlled and the soil remediation conditioner was prepared in a granular state of the wet type.
In the technical scheme that the granular soil remediation conditioner prepared in the step S2 is a wet soil remediation conditioner or a solidification soil remediation conditioner, when the prepared granular soil remediation conditioner is a wet soil remediation conditioner, the wet soil remediation conditioner is dried to be solidified, and then is cooled and bagged. When the prepared granular soil restoration conditioner is a solidification type soil restoration conditioner, directly cooling and bagging the solidification type soil restoration conditioner.
The moist soil restoration conditioner needs to be dried, and then can be conveniently bagged and stored.
In a further technical scheme, the particle size of the soil remediation conditioner prepared in the step S2 is 3-10 mm.
Generally speaking, the granular soil remediation conditioner is easy to be applied in a scattering manner, and the small-granular soil remediation conditioner has a large specific surface area, is easy to adsorb heavy metal ions in soil, is easy to combine with soil organic matters, improves the soil hardening condition, and accelerates the conditioning adsorption time.
The invention has the beneficial effects that:
1. in the granulating process, the straw is granulated together with the crushed straw, so that the waste is treated by waste, the process technology is simple, the economic income of farmers can be increased, and the economic situation of sustainable development is met;
2. the invention can completely carbonize and decompose the straws, so that the straws are returned to the field, secondary pollution is not generated, the cost is low, the universality is high, and large-scale popularization can be carried out;
3. the powder obtained after straw carbonization can absorb moisture, has adhesive property, is beneficial to mixing and forming of a conditioner, is economical and friendly, and has good granulating effect;
4. hydroxyapatite, active carbon and the like in the polluted soil restoration conditioner have strong ion exchangeability; the adsorption performance is high; the quicklime can improve the pH value of the soil, so that the heavy metal valence state in the soil is changed, and the quicklime and the heavy metal ions form a complex to lose biological activity; the soil can be effectively improved;
5. the invention only needs the conventional granulator and bagging machine, has the advantages of parent price and easy selection of experimental sites, can be directly sowed on the soil on site after granulation is finished, and is suitable and convenient.
Drawings
FIG. 1 is a flow chart of a granulation process of a contaminated soil remediation conditioner according to example 1 of the present invention.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
as shown in fig. 1, a granulation process of a contaminated soil remediation conditioner comprises the following steps:
s1, stirring and mixing the main material and the auxiliary material to obtain mixed powder;
s2, crushing straws, and placing the mixed powder obtained in the step S1 and the crushed straws into a crushing granulator for granulation to obtain the granular soil remediation conditioner.
In the above-described embodiment 1, the first embodiment,
the polluted soil restoration conditioner is a powdery substance which is generally prepared by calcining natural mineral substances (dolomite, limestone and potassium-containing shale) or other organic substances serving as main raw materials at high temperature. The main component of the quicklime is CaO, which can release heat to generate Ca (OH) when meeting water2And the temperature in the reaction process can reach the calcining temperature in the preparation process of the soil remediation conditioner, so the method utilizes the self-heating property of the quicklime and simplifies the process technology.
The straws are common agricultural wastes, contain rich water, have the humidity as high as 80 percent, can release a large amount of heat when being contacted with a mixture containing quicklime, and the generated temperature ensures that the soil remediation conditioner is sintered and molded and simultaneously promotes the straws to be carbonized and decomposed, so that the straws are returned to the field without secondary pollution. The powder after straw carbonization has adhesive property after absorbing moisture, and is beneficial to solidification and molding of the conditioner in the granulating process.
In another implementation derived from example 1, the main material in step S1 is a raw material mixture formed by mixing hydroxyapatite, zeolite, diatomite, activated carbon and nano iron powder according to a predetermined mass ratio; the auxiliary material is quicklime.
In another embodiment derived from embodiment 1, the straw pulverized in step S2 is rice straw. The rice straw has high humidity and is a better granulating raw material.
In another embodiment derived from example 1, in step S2, the average moisture value of the rice straw to be pulverized is 78.72%. The humidity is 78.72% and is suitable for granulation, which is measured by a Ketuo humidity tester.
In another embodiment derived from embodiment 1, the mass ratio of the mixed powder to the rice straw is 1: 2. The rice contains higher humidity, the mass ratio of the rice to the rice is 1:2, the heat release temperature of the soil restoration conditioner for solidification and molding can be reached, and sufficient moisture in the granulation process is ensured.
In another embodiment derived from example 1, the granular soil remediation conditioner prepared in step S2 is a set soil remediation conditioner. The soil restoration conditioner is just solidified and formed in the reaction process, and can be directly granulated.
In another embodiment derived from example 1, the set soil remediation conditioner is cooled and bagged directly. After cooling, the safety of bagging is ensured, and the pellet can be directly used after granulation is finished.
In another embodiment derived from example 1, the soil remediation conditioner produced in step S2 has a particle size of 3 mm. The granular soil restoration conditioner is easy to be applied in a scattering way, and the small-granular soil restoration conditioner has large specific surface area, is easy to absorb heavy metal ions in soil, is easy to combine with soil organic matters, improves the soil hardening condition and quickens the conditioning time.
Example 2:
a granulation process of a contaminated soil remediation conditioner comprises the following steps:
pretreatment: adding raw materials into a granulator according to a preset mass ratio, and uniformly mixing by using a stirring rod to obtain mixed powder, wherein the raw materials comprise hydroxyapatite, zeolite, quicklime and nano iron powder.
And (3) granulating: the wheat straw which is selected from the open farmland and is piled up on the spot after being harvested and the test humidity is 60 percent is firstly crushed into small segments, the crushing mode can be manual and mechanical, most of the wheat straw which is easy to break and is harvested is cut off, and the wheat straw which is selected is preferably manually crushed into longer wheat straw. Adding the crushed wheat straws into a granulator, starting the granulator to granulate, and closing the granulator when a solidified granular state is observed. The mass ratio of the mixed material to the wheat straw is set to be 1: 4.
Bagging: and (3) cooling the prepared solidified granular soil restoration conditioner to below 30 ℃ by prolonging the distance between the granules and a bagging machine, controlling the grain size of the prepared soil restoration conditioner to be 3mm, and bagging by using a bagging machine to obtain a finished product of the soil restoration conditioner.
Example 3:
a granulation process of a contaminated soil remediation conditioner comprises the following steps:
pretreatment: adding raw materials into a granulator according to a preset mass ratio, and uniformly mixing by using a stirring rod to obtain mixed powder, wherein the raw materials comprise hydroxyapatite, biochar, quicklime and nano iron powder.
And (3) granulating: the rape straws which are piled on the spot after being harvested on an open farmland and tested to have the humidity of 65% are crushed into small segments. Adding the crushed rape straws into a granulator, starting the granulator to granulate, and closing the granulator when a solidified granular state is observed. The mass ratio of the mixed material to the rape straw is set to be 1: 6.
Bagging: and (3) cooling the prepared solidified granular soil restoration conditioner to below 30 ℃ by prolonging the distance between the granules and a bagging machine, controlling the grain size of the prepared soil restoration conditioner to be 5mm, and bagging by using a bagging machine to obtain a finished product of the soil restoration conditioner.
Example 4:
a granulation process of a contaminated soil remediation conditioner comprises the following steps:
pretreatment: adding raw materials into a granulator according to a preset mass ratio, and uniformly mixing by using a stirring rod to obtain mixed powder, wherein the raw materials comprise hydroxyapatite, diatomite, quicklime and nano iron powder.
And (3) granulating: the rice straw is selected from rice straw which is cut in the open field and then is piled up on the spot and the humidity is tested to be 30%, the rice straw is selected from agricultural waste which is cut after being cut before 3 months, the rice straw is firstly crushed into small segments, the crushed rice straw is added into the granulator, meanwhile, water accounting for 5% of the mass of the mixed powder is added, the granulator is started, granulation is started, and when a wet particle state is observed, the granulator is closed. The mass ratio of the mixed material to the wheat straw is set to be 1: 10.
Bagging: drying the obtained wet soil restoration conditioner at 90 ℃ to obtain solidified granular soil restoration conditioner, reducing the temperature of the solidified granular soil restoration conditioner to below 30 ℃ by prolonging the distance of granulation and bagging, controlling the particle size of the prepared soil restoration conditioner to be 3mm, and bagging by using a bagging machine to obtain a finished product of the soil restoration conditioner.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. A granulation process of a contaminated soil remediation conditioner is characterized by comprising the following steps:
s1, stirring and mixing the main material and the auxiliary material to obtain mixed powder;
s2, crushing straws, and putting the mixed powder obtained in the step S1 and the crushed straws into a crushing granulator for granulation at the same time to obtain the granular soil remediation conditioner.
2. The granulation process of the contaminated soil remediation conditioner of claim 1, wherein the main material in step S1 is a raw material mixture formed by mixing hydroxyapatite, zeolite, diatomaceous earth, activated carbon and nano iron powder according to a predetermined mass ratio; the auxiliary material is quicklime.
3. The granulation process of the contaminated soil remediation conditioner of claim 1, wherein the straw pulverized in step S2 is wheat straw, rice straw, rape straw or corn straw.
4. The granulation process of the contaminated soil remediation conditioner of claim 1, wherein in step S2, the average moisture value of the straw to be crushed is 50% -85%.
5. The granulation process of the contaminated soil remediation conditioner of claim 1, wherein when the average moisture value of the straw to be crushed is less than 50%, the mixed powder and the crushed straw are placed in a crushing granulator, and water is added in an amount of 2% -10% by mass of the mixed powder.
6. The granulation process of the contaminated soil remediation conditioner of claim 1, wherein the mass ratio of the mixed powder to the straw is 1: 2-10.
7. The granulation process of the contaminated soil remediation conditioner of claim 1, wherein the granular soil remediation conditioner prepared in step S2 is a wetting soil remediation conditioner or a setting soil remediation conditioner.
8. The granulation process of the contaminated soil remediation conditioner of claim 7, further comprising the steps of:
when the prepared granular soil restoration conditioner is a wet soil restoration conditioner, drying the wet soil restoration conditioner to be solidified, cooling and bagging;
when the prepared granular soil restoration conditioner is a solidification type soil restoration conditioner, directly cooling and bagging the solidification type soil restoration conditioner.
9. The granulation process of the contaminated soil remediation conditioner of claim 1, wherein the particle size of the soil remediation conditioner prepared in step S2 is 3mm to 10 mm.
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