CN106034436A - Method for recovering tilth of soil after thermal desorption - Google Patents
Method for recovering tilth of soil after thermal desorption Download PDFInfo
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- CN106034436A CN106034436A CN201610345651.3A CN201610345651A CN106034436A CN 106034436 A CN106034436 A CN 106034436A CN 201610345651 A CN201610345651 A CN 201610345651A CN 106034436 A CN106034436 A CN 106034436A
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- mixed soil
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- thermal desorption
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- Biotechnology (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Biochemistry (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Inorganic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a method for recovering tilth of soil after thermal desorption. The method comprises the following steps: 1) preheating flow-state livestock and poultry manures by utilizing low-temperature waste heat generated by a thermal desorption system; 2) adding the preheated flow-state livestock and poultry manures into the soil treated by thermal desorption, carrying out uniform mixing so as to obtain a mixed soil system A, and subjecting the mixed soil system A to heat-preserving and sterilization for 30 to 60 min so as to obtain aseptic mixed soil; 3) preheating a next batch of to-be-treated flow-state livestock and poultry manures by utilizing waste heat of the aseptic mixed soil; and 4) adding water, straw powder and a compound microbial preparation into the naturally-cooled aseptic mixed soil, carrying out uniform mixing under stirring so as to obtain a mixed soil system B, stacking the mixed soil system B, and carrying out fermentation at room temperature for 7 to 15 days. The method provided by the invention is simple, has low cost, can rapidly improve organic matter content, nitrogen and phosphorus contents and moisture content in the soil after thermal desorption, and recovers the fertility and the water content of the soil after thermal desorption, thereby recovering the tilth of the soil after thermal desorption.
Description
Technical field
The invention belongs to environmental conservation and technical field of soil remediation, be specifically related to soil cultivation after a kind of recovery heat desorption
The method of property, the method can improve and recover the organic polluted soil repaired by high-temperature hot desorption method or mercury contaminated soil
Drafting Ability, realizes the disposal of resources to feces of livestock and poultry simultaneously.
Background technology
Thermal desorption technology as a kind of non-burning technology, Pollutant Treatment wide ranges, equipment are removable, repair after soil can
Recycling, particularly to chlorinated organics, the processing mode of non-oxide burning can avoid the generation of dioxin, has been widely used in
Organic pollutants contaminated soil and the reparation of mercury contaminated soil.
Chinese patent application " mercury contaminated soil thermal desorption and hydrargyrum recovery method and integration apparatus " (application number:
201510294274.0) disclose a kind of method that mercury contaminated soil thermal desorption is repaired.The method specific as follows: by mercury pollution
Adding villaumite and water after soil breaking, mud is made in stirring, regulates mud pH to 6.5-7.5 with acidic aqueous solution, and mud is natural
Crush after Feng Ganing, pending soil is carried out under the conditions of 150-300 DEG C thermal desorption, under natural cooling, reclaim hydrargyrum.But,
After the method carries out the heating of 150-300 DEG C to soil, a large amount of losses of the soil organism, the soil after thermal desorption will necessarily be caused
Earth farming ability is remarkably decreased.
Chinese patent application " two-part rotary kiln indirect thermal desorption apparatus " (application number: CN201510053096.2) is open
A kind of renovation of organic pollution soil or the thermal desorption device of mercury contaminated soil.This device is by feed hopper, charging flapper, upper strata
Rotary kiln drying room, aerator, lower floor's rotary kiln pyrogenation analysis part composition such as room and discharge bucket.This device passes through 200-650 DEG C
High temperature soil is carried out thermal desorption process, to after soil UTILIZATION OF VESIDUAL HEAT IN discharge.But, what the method used is up to 650 DEG C
Soil Thermal desorption condition almost can be pyrolyzed completely by the soil organism or volatile flow loses, and causes the barren of soil after thermal desorption,
The most suitably plant.
Even if the soil after thermal desorption method processes still contains more heat after using conventional waste heat recovery, it is allowed to
Natural cooling does not meets the policy of China's energy-saving and emission-reduction in atmosphere.And the waste heat recovery that the preheating in soil carries out the degree of depth needs
Device to be increased, increases the cost that thermal desorption processes.Additionally, the soil after thermal desorption is solid-state, use common heat exchange
Method is difficult to reach preferable heat exchanger effectiveness.
At present, on the one hand, due to developing rapidly of livestock culture industry, fowl and animal excrement generation amount improves the most year by year, if not
It is acted upon and utilizes, it will environment is caused pollution greatly.Fowl and animal excrement is the fertilizer that a class compares high-quality in fact, special
Other chicken manure, the feedstuff taken in due to chicken does not has catapepsis absorption, and the nutrient that there are about 40%-70% is excreted, because of
This chicken manure nutrient in the middle of all fowl and animal excrements is the highest.Chicken manure contains purity nitrogen, phosphorus (P2O5), potassium (K2O) be about 1.63%,
1.54%, 0.85%.But the parasite in chicken manure and ovum thereof, and more communicable pathogenic bacterias lead to hinder chicken manure should
With.And on the other hand, chicken farm every day of China all can the substantial amounts of chicken manure of output, mostly these chicken manures are that moisture content reaches 70% even
The wet chicken manure of 80%, needs through drying or being just easy to use as fertilizer after hot fermentation.But fermentation needs take greatly
The place of amount, dries and needs to consume the substantial amounts of energy, thus of disposal Ye Shi China poultry husbandry of these wet chicken manures at present
A difficult problem.
On the other hand, Open Burning Crop Residue remains incessant after repeated prohibition in China, but straw-returning is but one very ecological, environmental protective
The method increase soil fertility, straw can increase carbon source content and other nutrition content of soil.
Summary of the invention
For solving the problem that above-mentioned prior art exists, the invention provides soil cultivation after a kind of recovery heat is desorbed
Method, the method is simple, low cost, can quickly improve the content of organic matter, nitrogen and phosphorus content and moisture content in soil after thermal desorption,
The fertility of soil and water content after recovery heat desorption, thus the farming of soil after recovery heat desorption.
Realizing the technical scheme that above-mentioned purpose of the present invention used is:
After a kind of recovery heat desorption, the method for soil cultivation, comprises the steps:
1) utilize the low temperature exhaust heat preheating fluidised form feces of livestock and poultry that thermal desorption system produces, make in the temperature of fluidised form feces of livestock and poultry
Rise to 50-80 DEG C；
2) soil after thermal desorption processes still has the temperature of 200 DEG C-650 DEG C, by the fluidised form feces of livestock and poultry of hot prognosis
Joining in the soil after thermal desorption processes, the quality that the fluidised form feces of livestock and poultry of hot prognosis adds is after thermal desorption processes
The 5%-25% of soil quality, mix homogeneously, obtain mixed soil system A, mixed soil system A still has 150 DEG C-250 DEG C
Temperature, by mixed soil system A insulated sterilizing 30-60 minute, obtains aseptic mixed soil, and the most aseptic mixed soil still has 80
The temperature of DEG C-120 DEG C；
3) utilize the fluidised form feces of livestock and poultry that aseptic mixed soil waste heat preheating next group is pending, make next group pending
The temperature of fluidised form feces of livestock and poultry rises to 50 DEG C-80 DEG C, makes to be down at a temperature of aseptic mixed soil 50 DEG C-80 DEG C simultaneously, then
Aseptic mixed soil is allowed to naturally cool to less than 40 DEG C；
4) the aseptic mixed soil after natural cooling adds water, stalk powder and complex micro organism fungicide, powder of straw
The 1%-5% that quality is aseptic mixed soil quality that end adds, the quality that complex micro organism fungicide adds is aseptic composite soil
The 0.1%-1% of loamy texture amount, stirs, and obtains mixed soil system B, and the moisture content of mixed soil system B is 30%-45%,
Mixed soil system B is banked up, natural fermentation 7-15 days.
Described fluidised form feces of livestock and poultry is any one in chicken manure, pig manure and cattle manure, or the most several combinations, stream
The moisture content of state feces of livestock and poultry is 70%-200%.
A length of below the 2cm of described stalk powder.
Step 4) in, the water added in the aseptic mixed soil after natural cooling is the water recycled, by with lower section
Method recycles and obtains: by step 1) in the steam that produces during heat preheating fluidised form feces of livestock and poultry, and step 2) in heat pre-
After fluidised form feces of livestock and poultry with through thermal desorption process after mixing with soil, insulation sterilization process in produce steam first collect, so
Water vapour in rear condensation recovered steam, then condensation is reclaimed discharge after the tail gas activated carbon adsorption produced processes.
Described complex micro organism fungicide is by blown-ball Azotobacter, bacillus megaterium, Lactobacillus plantarum, actinomycetes, yeast
Bacterium and rhodospirillum are constituted, blown-ball Azotobacter (AzotobacferchroococcumBeijerick, ACCC 10002), huge bud
Spore bacillus (Bacillus megaterium, ACCC 10010 or ACCC 10011), Lactobacillus plantarum (Lactobacillus
Plantarum, CGMCC1.555 or ACCC10533 or ACCC10644), actinomycetes (Dactylosporangiumsp,
ACCC40661), yeast (Saccharomyces cerevisiae, ATCC204508), rhodospirillum
The mass fraction of (Rhodospirillumsp, CGMCC 6869) be respectively 5%-20%, 10%-20%, 5%-15%,
10%-25%, 10%-20%, 5%-20%.
Compared with prior art, advantages of the present invention and having the beneficial effects that:
1) present invention is by comprehensively utilizing the waste heat of soil, feces of livestock and poultry and straw after thermal desorption, solves and works as
After front thermal desorption processes, soil fertility lacks, it is impossible to the problem of farming, by barren heat in the case of without any chemical fertilizer
Desorption processes soil and is converted into suitable anthropogenic soil, and feces of livestock and poultry and straw both materials also achieve resource profit simultaneously
With.
2) soil after the present invention uses the thermal desorption of fluidised form feces of livestock and poultry and solid-state to process carries out heat exchange, significantly carries
High thermal desorption is processed after the utilization rate of waste heat of soil, thus improve the economic benefit of soil remediation engineering.
3) the inventive method is the most ingenious simply, low cost, and achieves recycling and the protection to environment, suitable
Close popularization and application on a large scale.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1
1) utilize the fluidised form chicken manure that low temperature exhaust heat preheating moisture content is 82% that thermal desorption system produces, make fluidised form chicken manure
Temperature rises to 63 DEG C；
2) temperature of the soil after thermal desorption processes is 262 DEG C, is joined by the fluidised form feces of livestock and poultry of 63 DEG C and takes off through heat
In soil after attached process, the quality that the fluidised form feces of livestock and poultry of 63 DEG C just adds is the soil quality after thermal desorption processes
13%, mix homogeneously, obtain mixed soil system A that temperature is 186 DEG C, by mixed soil system A insulated sterilizing 30 minutes, obtain warm
Degree is the aseptic mixed soil of 116 DEG C, insulation sterilization can not only kill fluidised form chicken manure just in pathogenic microorganism, moreover it is possible to mixing
Soil system A carries out mummification；First collect the steam produced during heat preheating fluidised form feces of livestock and poultry in this step, Yi Jire simultaneously
The fluidised form feces of livestock and poultry of prognosis and the steam of generation in the mixing with soil after thermal desorption processes, insulation sterilization process, the coldest
Discharge after water vapour in solidifying recovered steam, then the tail gas activated carbon adsorption process that condensation recovery is produced.
3) waste heat utilizing aseptic mixed soil preheats the pending fluidised form chicken manure of next group 20 minutes, and now next group is treated
The fluidised form feces of livestock and poultry processed all reaches 69 DEG C with the temperature of aseptic mixed soil, then allows aseptic mixed soil naturally cool to 39
℃；
4) in the aseptic mixed soil after natural cooling add step 2) in condensation reclaim water, be crushed to a length of
The stalk powder of 2cm, complex micro organism fungicide, quality is aseptic mixed soil quality the 2% of stalk powder addition, compound micro-
Bacteria agent add quality is aseptic mixed soil quality 0.5%, this complex micro organism fungicide is by blown-ball Azotobacter, huge
Bacillus cereus, Lactobacillus plantarum, actinomycetes, yeast and rhodospirillum are constituted, blown-ball Azotobacter, bacillus megaterium, plant breast
Bacillus, actinomycetes, yeast, the mass fraction of rhodospirillum are respectively 15%, 12%, 13%, 22%, 18%, 20%, and stirring is all
Even, obtain mixed soil system B, the moisture content of mixed soil system B is 30%, mixed soil system B is banked up, room temperature (25 ± 5
DEG C) ferment 10 days.
After testing, after fermenting 10 days, this soil with organic matter content reaches 6.2%, and total nitrogen content brings up to 95mg/Kg,
Phosphorus (P2O5) content brings up to 113mg/Kg potassium (K2O) content brings up to 186mg/Kg, has been particularly suitable for cultivating crops.
Embodiment 2
1) utilize the fluidised form chicken manure that low temperature exhaust heat preheating moisture content is 78% that thermal desorption system produces, make fluidised form chicken manure
Temperature rises to 57 DEG C；
2) temperature of the soil after thermal desorption processes is 244 DEG C, is joined by the fluidised form feces of livestock and poultry of 57 DEG C and takes off through heat
In soil after attached process, the quality that the fluidised form feces of livestock and poultry of 57 DEG C adds is the soil quality after thermal desorption processes
10%, mix homogeneously, obtain mixed soil system A that temperature is 171 DEG C, by mixed soil system A insulated sterilizing 30 minutes, obtain warm
Degree is the aseptic mixed soil of 112 DEG C, insulation sterilization can not only kill fluidised form chicken manure just in pathogenic microorganism, moreover it is possible to mixing
Soil system A carries out mummification；First collect the steam produced during heat preheating fluidised form feces of livestock and poultry in this step, Yi Jire simultaneously
The fluidised form feces of livestock and poultry of prognosis and the steam of generation in the mixing with soil after thermal desorption processes, insulation sterilization process, the coldest
Discharge after water vapour in solidifying recovered steam, then the tail gas activated carbon adsorption process that condensation recovery is produced.
3) waste heat utilizing aseptic mixed soil preheats the pending fluidised form chicken manure of next group 20 minutes, and now next group is treated
The temperature of fluidised form feces of livestock and poultry processed rises to 55 DEG C, is down to 66 DEG C at a temperature of aseptic mixed soil, then allows aseptic mixing
Soil natural is cooled to 38 DEG C；
4) in the aseptic mixed soil after natural cooling add step 2) in condensation reclaim water, be crushed to a length of
The stalk powder of 2cm, complex micro organism fungicide, quality is aseptic mixed soil quality the 2% of stalk powder addition, compound micro-
Bacteria agent add quality is aseptic mixed soil quality 0.5%, this complex micro organism fungicide is by blown-ball Azotobacter, huge
Bacillus cereus, Lactobacillus plantarum, actinomycetes, yeast and rhodospirillum are constituted, blown-ball Azotobacter, bacillus megaterium, plant breast
Bacillus, actinomycetes, yeast, the mass fraction of rhodospirillum are respectively 13%, 12%, 15%, 22%, 18%, 20%, and stirring is all
Even, obtain mixed soil system B, the moisture content of mixed soil system B is 30%, mixed soil system B is banked up, room temperature (25 ± 5
DEG C) ferment 11 days.
After testing, after fermenting 11 days, this soil with organic matter content reaches 6.7%, and total nitrogen content brings up to 102mg/Kg,
Phosphorus (P2O5) content brings up to 125mg/Kg potassium (K2O) content brings up to 174mg/Kg, has been particularly suitable for cultivating crops.
Claims (5)
1. the method for soil cultivation after a recovery heat desorption, it is characterised in that comprise the steps:
1) utilize the low temperature exhaust heat preheating fluidised form feces of livestock and poultry that thermal desorption system produces, make the temperature of fluidised form feces of livestock and poultry rise to
50-80℃；
2) soil after thermal desorption processes still has the temperature of 200 DEG C-650 DEG C, is added by the fluidised form feces of livestock and poultry of hot prognosis
In the soil after thermal desorption processes, the quality that the fluidised form feces of livestock and poultry of hot prognosis adds is the soil after thermal desorption processes
The 5%-25% of quality, mix homogeneously, obtain mixed soil system A, mixed soil system A still has the temperature of 150 DEG C-250 DEG C,
By mixed soil system A insulated sterilizing 30-60 minute, obtain aseptic mixed soil, the most aseptic mixed soil still have 80 DEG C-
The temperature of 120 DEG C；
3) utilize the fluidised form feces of livestock and poultry that aseptic mixed soil waste heat preheating next group is pending, make the fluidised form that next group is pending
The temperature of feces of livestock and poultry rises to 50 DEG C-80 DEG C, makes to be down at a temperature of aseptic mixed soil 50 DEG C-80 DEG C simultaneously, then allows nothing
Bacterium mixed soil naturally cools to less than 40 DEG C；
4) adding water, stalk powder and complex micro organism fungicide in the aseptic mixed soil after natural cooling, stalk powder adds
The quality entered is the 1%-5% of aseptic mixed soil quality, and the quality that complex micro organism fungicide adds is aseptic composite soil loamy texture
The 0.1%-1% of amount, stirs, obtains mixed soil system B, and the moisture content of mixed soil system B is 30%-45%, will be mixed
Close soil system B to bank up, natural fermentation 7-15 days.
The method of soil cultivation after recovery heat the most according to claim 1 desorption, it is characterised in that: described fluidised form poultry
Poultry manure is any one in chicken manure, pig manure and cattle manure, or the most several combinations, and the moisture content of fluidised form feces of livestock and poultry is
70%-200%.
The method of soil cultivation after recovery heat the most according to claim 1 desorption, it is characterised in that: described powder of straw
A length of below the 2cm at end.
The method of soil cultivation after recovery heat the most according to claim 1 desorption, it is characterised in that step 4) in, to certainly
The water so added in the aseptic mixed soil after cooling is the water recycled, following methods recycle and obtain: by step
1) in heat preheating fluidised form feces of livestock and poultry during produce steam, and step 2) in hot prognosis fluidised form feces of livestock and poultry with through heat
Desorption process after mixing with soil, insulation sterilization process in produce steam first collect, then condensation recovered steam in water steam
Vapour, then condensation is reclaimed discharge after the tail gas activated carbon adsorption produced processes.
The method of soil cultivation after recovery heat the most according to claim 1 desorption, it is characterised in that: described is compound micro-
Bacteria agent is made up of blown-ball Azotobacter, bacillus megaterium, Lactobacillus plantarum, actinomycetes, yeast and rhodospirillum, and brown ball is solid
Nitrogen bacterium, bacillus megaterium, Lactobacillus plantarum, actinomycetes, yeast, the mass fraction of rhodospirillum be respectively 5%-20%,
10%-20%, 5%-15%, 10%-25%, 10%-20%, 5%-20%.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1332659A2 (en) * | 2002-02-05 | 2003-08-06 | CLAAS Selbstfahrende Erntemaschinen GmbH | Automotive agricultural working vehicle localizing system |
| CN103718691A (en) * | 2013-12-17 | 2014-04-16 | 吉林农业大学 | Soil improvement method |
| CN104761385A (en) * | 2015-04-11 | 2015-07-08 | 黑龙江八一农垦大学 | Multifunctional microbial organic fertilizer and preparation method thereof |
| CN105198677A (en) * | 2015-11-12 | 2015-12-30 | 四川亨润农业科技股份有限公司 | Selenium-rich biological organic fertilizer and preparation method thereof |
-
2016
- 2016-05-23 CN CN201610345651.3A patent/CN106034436B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1332659A2 (en) * | 2002-02-05 | 2003-08-06 | CLAAS Selbstfahrende Erntemaschinen GmbH | Automotive agricultural working vehicle localizing system |
| CN103718691A (en) * | 2013-12-17 | 2014-04-16 | 吉林农业大学 | Soil improvement method |
| CN104761385A (en) * | 2015-04-11 | 2015-07-08 | 黑龙江八一农垦大学 | Multifunctional microbial organic fertilizer and preparation method thereof |
| CN105198677A (en) * | 2015-11-12 | 2015-12-30 | 四川亨润农业科技股份有限公司 | Selenium-rich biological organic fertilizer and preparation method thereof |
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