CN105131967A - Method for preparing alkali-affected soil water retention conditioner based on desulfurized gypsum - Google Patents
Method for preparing alkali-affected soil water retention conditioner based on desulfurized gypsum Download PDFInfo
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- CN105131967A CN105131967A CN201510543991.2A CN201510543991A CN105131967A CN 105131967 A CN105131967 A CN 105131967A CN 201510543991 A CN201510543991 A CN 201510543991A CN 105131967 A CN105131967 A CN 105131967A
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Abstract
The invention belongs to the field of waste utilization and provides a method for preparing alkali-affected soil water retention conditioner based on desulfurized gypsum. The method aims at solving the problems that currently, a large quantity of desulfurized gypsum waste exists in China, and due to the fact that the desulfurized gypsum is poor in grain composition, large in free water quantity, high in water requirement of normal consistency, large in content of water-soluble salt and the like, the utilization rate of the desulfurized gypsum is low. The desulfurized gypsum serves as a base to be modified, and is immersed in fermentation liquid of corn and chicken manure, and then the alkali-affected soil water retention conditioner is prepared. It is proved through living examples that the prepared water retention conditioner is low in manufacturing cost, easy to use, capable of quickly improving soil water retention performance, improving the soil physicochemical property, promoting vegetation recovery and reducing the soil alkalization degree to 3% to 6% within 1-3 months, and materials are easy to obtain.
Description
Technical field
The invention belongs to waste utilization field, is a kind of method preparing alkali-affected soil water keeping amendment based on desulfurated plaster.
Background technology
Along with enforcement and the propelling of power plant stack gas desulfurization project, create a large amount of desulfuration byproduct-desulfurated plasters, estimate, the annual production of national desulfurized gesso of flue gas in recent years about reaches 2,000 ten thousand t.Therefore, by resource utilization and Sustainable development viewpoint research desulfurated plaster and the application in building materials industry thereof, significant.Desulfurated plaster is a kind of extraordinary building resource, and its particle is tiny and size-grade distribution is more concentrated, the crystal comparison rule that aquation is formed, and wherein sulfate dihydrate calcium contents is up to 95%, is the starting material with plaster of paris equivalence.Particularly European abroad, nearly all desulfurated plaster is all widely used in building material industry.The domestic comprehensive treating process to desulfurated plaster and application start to walk, and the production of desulfurated plaster contains the huge market opportunity with application.But desulfurated plaster exists, and grain composition is poor, free-water large, mark the shortcomings such as thick water consumption is large, containing water-soluble salt is more, causes its utilization ratio lower.
All there is distribution northern China various places, and alkalinization often occurs together with demineralising process, but desalination might not cause alkalization.When alkalinization is due to Soil Desalting, sodium ion in the soil solution exchanges mutually with the calcium in soil colloid, magnesium ion, make soil colloid adsorb more exchangeable sodium, soil is strong basicity reaction, and pH is at more than 8.5-9, soil physical properties is worsened, soil high granular, expands time wet, hardens time dry, permeability is very poor, growing of serious obstruction crop.Generally account for more than 20% of exchangeable cation total amount for alkaline earth index (basicity) with exchangeable sodium.
Summary of the invention
The technical problem that the present invention mainly solves: there is a large amount of desulfurated plaster waste for current China, because desulfurated plaster exists, grain composition is poor, free-water large, mark the shortcomings such as thick water consumption is large, containing water-soluble salt is more, cause its utilization ratio lower, the invention provides a kind of based on desulfurated plaster, modification processing is carried out to it, then be soaked in the fermented liquid of corn and chicken manure, prepare alkali-affected soil water keeping amendment.
In order to solve the problem, the technical solution adopted in the present invention is:
(1) get desulfurated plaster and put into pulverizer, be ground into 40 ~ 60 order particles, its particle is put into container, add water logging wherein and do not have particle 3 ~ 5cm, add N-substituting thioureido wherein again, add-on is 0.01 ~ 0.2% of desulfurated plaster quality, add wintergreen oil again, add-on is 0.1 ~ 0.3% of desulfurated plaster quality, is sodium hydroxide solution adjust ph to 7.6 ~ 8.2 of 16 ~ 24% with massfraction, stirs 40 ~ 56min, then 10 ~ 15 are left standstill, put it in whizzer, carry out solid-liquid separation, collect solid for subsequent use;
(2) corn stalk powder is broken into 50 ~ 70 order powder, mixes according to mass ratio 1:4 with water, put it in high-pressure reactor, temperature is set as 80 ~ 100 DEG C, pressure setting is 5 ~ 12MPa, keep 40 ~ 55min, then in 5 ~ 10s pressure release to standard atmospheric pressure;
(3) the maize straw powder of above-mentioned process is put into container, add the chicken manure of maize straw powder quality 10 ~ 15% wherein, the active sludge of maize straw powder quality 5 ~ 8% and the lactic acid of maize straw powder quality 2 ~ 4%, stir, temperature is kept to be 35 ~ 40 DEG C, sealing and fermenting 1 ~ 2 day, collects fermented liquid;
(4) desulfurated plaster of the process collected by step (1) is put into container, add above-mentioned caused fermented liquid wherein and flood desulfurated plaster 3 ~ 5cm, add polyacrylamide wherein again, add-on is desulfurated plaster quality 0.1 ~ 0.3%, be heated to 70 ~ 80 DEG C, stir 30 ~ 40min;
(5) above-mentioned mixed solution is put into roll pelletizer and carry out granulation, obtained particle diameter is the particle of 1.2 ~ 2.2mm.
Application method of the present invention: according to the water keeping amendment obtained by the 45 kilograms of the present invention of every mu of alkali-affected soil, alkali-affected soil is turned over, then water keeping amendment is sprinkling upon in soil, then turn over once, water keeping amendment is carried out covering.
Beneficial effect of the present invention:
(1) the water keeping amendment cost of manufacture obtained by the present invention is cheap, draws materials conveniently, is easy to use;
(2) the present invention can improve fast and strengthen Water holding capacity of surface, improves soil physico-chemical characteristic, promote Revegetation;
(3) alkalization of soils degree can be dropped to 3 ~ 6% at 1 ~ 3 month by the water keeping amendment system obtained by the present invention.
Specific embodiments
Get desulfurated plaster and put into pulverizer, be ground into 40 ~ 60 order particles, its particle is put into container, add water logging wherein and do not have particle 3 ~ 5cm, add N-substituting thioureido wherein again, add-on is 0.01 ~ 0.2% of desulfurated plaster quality, add wintergreen oil again, add-on is 0.1 ~ 0.3% of desulfurated plaster quality, is sodium hydroxide solution adjust ph to 7.6 ~ 8.2 of 16 ~ 24% with massfraction, stirs 40 ~ 56min, then 10 ~ 15 are left standstill, put it in whizzer, carry out solid-liquid separation, collect solid for subsequent use; Corn stalk powder is broken into 50 ~ 70 order powder, mixes according to mass ratio 1:4 with water, put it in high-pressure reactor, temperature is set as 80 ~ 100 DEG C, pressure setting is 5 ~ 12MPa, keep 40 ~ 55min, then in 5 ~ 10s pressure release to standard atmospheric pressure; The maize straw powder of above-mentioned process is put into container, add the chicken manure of maize straw powder quality 10 ~ 15% wherein, the active sludge of maize straw powder quality 5 ~ 8% and the lactic acid of maize straw powder quality 2 ~ 4%, stir, temperature is kept to be 35 ~ 40 DEG C, sealing and fermenting 1 ~ 2 day, collects fermented liquid; The desulfurated plaster of collected process is put into container, add above-mentioned caused fermented liquid wherein and flood desulfurated plaster 3 ~ 5cm, then add polyacrylamide wherein, add-on is desulfurated plaster quality 0.1 ~ 0.3%, be heated to 70 ~ 80 DEG C, stir 30 ~ 40min; Above-mentioned mixed solution is put into roll pelletizer and carries out granulation, obtained particle diameter is the particle of 1.2 ~ 2.2mm.
Get 1kg desulfurated plaster and put into pulverizer, be ground into 40 order particles, its particle is put into container, add water logging wherein and do not have particle 3cm, add 0.1gN-substituting thioureido wherein again, then add 1g wintergreen oil, by the sodium hydroxide solution adjust ph to 7.6 that massfraction is 16%, stir 40min, then leave standstill 10, put it in whizzer, carry out solid-liquid separation, collect solid for subsequent use; 2kg corn stalk powder is broken into 50 order powder, mixes with water according to mass ratio 1:4, put it in high-pressure reactor, temperature is set as 80 DEG C, and pressure setting is 5MPa, keep 40min, then in 5s pressure release to standard atmospheric pressure; The maize straw powder of above-mentioned process is put into container, adds 200g chicken manure wherein, the active sludge of 100g and the lactic acid of 40g, stir, and keeps temperature to be 35 DEG C, sealing and fermenting 1 day, collects fermented liquid; The desulfurated plaster of collected process is put into container, adds above-mentioned caused fermented liquid wherein and flood desulfurated plaster 3cm, then add the polyacrylamide of 1g wherein, be heated to 70 DEG C, stir 30min; Above-mentioned mixed solution is put into roll pelletizer and carries out granulation, obtained particle diameter is the particle of 1.2mm.
According to the water keeping amendment obtained by the 45 kilograms of the present invention of every mu of alkali-affected soil, be that 21% alkali-affected soil is turned over by basicity, then the water keeping amendment obtained by the present invention is sprinkling upon in soil, turn over again once, covered by water keeping amendment, after 38 days, alkalization of soils degree drops to 5% and this soil can plant crops.
Get 1kg desulfurated plaster and put into pulverizer, be ground into 60 order particles, its particle is put into container, add water logging wherein and do not have particle 5cm, add 2gN-substituting thioureido wherein again, adding 6g wintergreen oil again, is the sodium hydroxide solution adjust ph to 8.2 of 24% with massfraction, stirs 56min, then 15 are left standstill, put it in whizzer, carry out solid-liquid separation, collect solid for subsequent use; 2kg corn stalk powder is broken into 70 order powder, mixes with water according to mass ratio 1:4, put it in high-pressure reactor, temperature is set as 100 DEG C, and pressure setting is 12MPa, keep 55min, then in 10s pressure release to standard atmospheric pressure; The maize straw powder of above-mentioned process is put into container, adds the chicken manure of 300g wherein, the active sludge of 160g and the lactic acid of 80g, stir, and keeps temperature to be 40 DEG C, sealing and fermenting 2 days, collects fermented liquid; The desulfurated plaster of collected process is put into container, adds above-mentioned caused fermented liquid wherein and flood desulfurated plaster 5cm, then add the polyacrylamide of 3g wherein, be heated to 80 DEG C, stir 40min; Above-mentioned mixed solution is put into roll pelletizer and carries out granulation, obtained particle diameter is the particle of 2.2mm.
According to the water keeping amendment obtained by the 45 kilograms of the present invention of every mu of alkali-affected soil, by basicity be 26% alkali-affected soil turn over, then the water keeping amendment obtained by the present invention is sprinkling upon in soil, turn over again once, covered by water keeping amendment, after 40 days, alkalization of soils degree drops to 5% and this soil can plant crops.
Get 1kg desulfurated plaster and put into pulverizer, be ground into 50 order particles, its particle is put into container, add water logging wherein and do not have particle 4cm, add 1.5gN-substituting thioureido wherein again, adding 4.6g wintergreen oil again, is the sodium hydroxide solution adjust ph to 7.8 of 20% with massfraction, stirs 50min, then 12 are left standstill, put it in whizzer, carry out solid-liquid separation, collect solid for subsequent use; 2kg corn stalk powder is broken into 60 order powder, mixes with water according to mass ratio 1:4, put it in high-pressure reactor, temperature is set as 90 DEG C, and pressure setting is 9MPa, keep 45min, then in 8s pressure release to standard atmospheric pressure; The maize straw powder of above-mentioned process is put into container, adds the chicken manure of 280g wherein, the active sludge of 142g and the lactic acid of 74g, stir, and keeps temperature to be 38 DEG C, sealing and fermenting 2 days, collects fermented liquid; The desulfurated plaster of collected process is put into container, adds above-mentioned caused fermented liquid wherein and flood desulfurated plaster 4cm, then add the polyacrylamide of 1.9g wherein, be heated to 75 DEG C, stir 35min; Above-mentioned mixed solution is put into roll pelletizer and carries out granulation, obtained particle diameter is the particle of 1.8mm.
According to the water keeping amendment obtained by the 45 kilograms of the present invention of every mu of alkali-affected soil, by basicity be 23% alkali-affected soil turn over, then the water keeping amendment obtained by the present invention is sprinkling upon in soil, turn over again once, covered by water keeping amendment, after 40 days, alkalization of soils degree drops to 6% and this soil can plant crops.
Claims (1)
1. prepare a method for alkali-affected soil water keeping amendment based on desulfurated plaster, it is characterized in that concrete preparation method is:
(1) get desulfurated plaster and put into pulverizer, be ground into 40 ~ 60 order particles, its particle is put into container, add water logging wherein and do not have particle 3 ~ 5cm, add N-substituting thioureido wherein again, add-on is 0.01 ~ 0.2% of desulfurated plaster quality, add wintergreen oil again, add-on is 0.1 ~ 0.3% of desulfurated plaster quality, is sodium hydroxide solution adjust ph to 7.6 ~ 8.2 of 16 ~ 24% with massfraction, stirs 40 ~ 56min, then 10 ~ 15 are left standstill, put it in whizzer, carry out solid-liquid separation, collect solid for subsequent use;
(2) corn stalk powder is broken into 50 ~ 70 order powder, mixes according to mass ratio 1:4 with water, put it in high-pressure reactor, temperature is set as 80 ~ 100 DEG C, pressure setting is 5 ~ 12MPa, keep 40 ~ 55min, then in 5 ~ 10s pressure release to standard atmospheric pressure;
(3) the maize straw powder of above-mentioned process is put into container, add maize straw powder quality wherein? the chicken manure of 10 ~ 15%, the active sludge of maize straw powder quality 5 ~ 8% and the lactic acid of maize straw powder quality 2 ~ 4%, stir, temperature is kept to be 35 ~ 40 DEG C, sealing and fermenting 1 ~ 2 day, collects fermented liquid;
(4) desulfurated plaster of the process collected by step (1) is put into container, add above-mentioned caused fermented liquid wherein and flood desulfurated plaster 3 ~ 5cm, add polyacrylamide wherein again, add-on is desulfurated plaster quality 0.1 ~ 0.3%, be heated to 70 ~ 80 DEG C, stir 30 ~ 40min;
(5) above-mentioned mixed solution is put into roll pelletizer and carry out granulation, obtained particle diameter is the particle of 1.2 ~ 2.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510543991.2A CN105131967A (en) | 2015-08-30 | 2015-08-30 | Method for preparing alkali-affected soil water retention conditioner based on desulfurized gypsum |
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| CN201510543991.2A CN105131967A (en) | 2015-08-30 | 2015-08-30 | Method for preparing alkali-affected soil water retention conditioner based on desulfurized gypsum |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106171428A (en) * | 2016-07-15 | 2016-12-07 | 山东胜伟园林科技有限公司 | A kind of method of desulfurated plaster improvement alkali-affected soil plantation Helianthi |
| CN106397014A (en) * | 2016-08-28 | 2017-02-15 | 安徽省司尔特肥业股份有限公司 | Preparation method of humic acid, silicon and calcium type soil conditioner |
| CN110156534A (en) * | 2019-05-31 | 2019-08-23 | 清华大学 | A kind of liquid desulfurized gypsum improvement saline-alkali soil synergist and its preparation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106171428A (en) * | 2016-07-15 | 2016-12-07 | 山东胜伟园林科技有限公司 | A kind of method of desulfurated plaster improvement alkali-affected soil plantation Helianthi |
| CN106397014A (en) * | 2016-08-28 | 2017-02-15 | 安徽省司尔特肥业股份有限公司 | Preparation method of humic acid, silicon and calcium type soil conditioner |
| CN110156534A (en) * | 2019-05-31 | 2019-08-23 | 清华大学 | A kind of liquid desulfurized gypsum improvement saline-alkali soil synergist and its preparation |
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Application publication date: 20151209 |
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