CN104119163B - The production method of attapulgite mud compression Nutrition Soil - Google Patents
The production method of attapulgite mud compression Nutrition Soil Download PDFInfo
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- 239000002689 soil Substances 0.000 title claims abstract description 93
- 235000016709 nutrition Nutrition 0.000 title claims abstract description 87
- 230000035764 nutrition Effects 0.000 title claims abstract description 84
- 238000007906 compression Methods 0.000 title claims abstract description 51
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
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- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 7
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 6
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- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 6
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Landscapes
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Fertilizers (AREA)
- Cultivation Of Plants (AREA)
Abstract
The invention discloses the production method of a kind of attapulgite mud compression Nutrition Soil, its technical scheme is characterized by, first attapulgite and mud are carried out acidification, then the dispensing that attapulgite mud compresses Nutrition Soil is stirred, compresses, be packaged as finished product after microwave low temperature sterilization；Attapulgite mud compression Nutrition Soil is made up of materials such as the Plant fiber after the mud after attapulgite clay after the acidify, acidifying, quick dissolved sodium silicate, peat, flower ceramsite, biogas slurry, pulverizing and High hydrophilous resins.Containing substantial amounts of nitrogen, phosphorus, potassium, organic matter and various trace elements in attapulgite mud compression Nutrition Soil; it is provided that nutrient necessary to plant growing; reduce the harm of pathogen and pests on plants; the normal growth being conducive to plant is grown; preserve the ecological environment; avoiding and surrounding enviroment cause secondary pollution, the production method of attapulgite mud compression Nutrition Soil is applicable to produce the attapulgite mud compression Nutrition Soil of various different formulations.
Description
Technical field
The present invention relates to Nutrition Soil, be specifically related to the production method of a kind of attapulgite mud compression Nutrition Soil.
Background technology
Attapulgite has the dispersion of uniqueness, good colloidal nature and the higher absorbability such as saline and alkaline high temperature resistant, anti-, and has certain plasticity and cohesive force.
Mud is the paste that a kind of easy corruption produced in sewage disposal process is smelly, it is enriched the pollutant in sewage, containing poisonous and harmful substances such as the nutrient substance such as a large amount of nitrogen, phosphorus and Organic substance, viral micro-organisms, parasitic ovum, heavy metals, without effectively processing disposal, environment will be produced serious harm.
Sludge moisture content >=80% that municipal sewage plant produces, mud is mostly in alkalescence, and pH value is 8～10, should not be directly produced the product of recycling.
Investigation display, current China has the mud of 80% not to be effectively addressed, and even has and is simply discarded in the public environment such as farmland, river greatly, becomes new polluter.
At present the mud of a large amount of non-stabilized treatment has become the heavy burden of sewage treatment plant, and mud how that yield is huge, complicated component carries out properly processing safely so that it is innoxious, minimizing, resource, it has also become deeply concerned key subjects.
Nutrition Soil be in order to meet seedling growth grow and particular formulation containing multiple mineral nutrition, loose ventilation, water conservation fertilizer-preserving ability is strong, without the soil of pest and disease damage.General native by fertile land for growing field crops and decomposed dung mixed preparing forms, also have selected from import high-quality peat, coconut palm bran, the Nutrition Soil mixed in specific proportions, but these Nutrition Soils are not through rational dispensing and strict sterilization, are unfavorable for that the normal growth of nursery stock is grown.
Owing to Nutrition Soil after treatment is relatively lighter and loose, the conventional products volume of Nutrition Soil is relatively large, is unfavorable for reducing the cost producing and transporting.
Chinese patent Authorization Notice No.: CN100559932C, authorized announcement date: on November 18th, 2009, name is called that " compressed type plant culture stroma " discloses a kind of substrate being exclusively used in roof greening, container plant culture, the composition and ratio of its each material is: wooden nutrient 40～50, fertilizer 20～35, attapulgite 25～30, composite bacteria 0.2～0.3, rare earth addition 0.2～0.3；Its processing step is by 5～50 wooden nutrients of purpose, with fertilizer and composite bacteria, attapulgite, mix and blend, briquet.
The weak point of above-mentioned patent is: " compressed type plant culture stroma " is simple by dispensing mix and blend, briquet, after selected wooden nutrient briquet, is difficult to provide nutritional labeling for the plant of cultivation at short notice；Relevant standard specifies content >=5% of fertilizer, and above-mentioned patent " content of fertilizer is preferably 20～25 " can not reach；Attapulgite is the common concave-convex rod soil not past modification, and the viscosity of common concave-convex rod soil is poor, can not play binding agent effect, simply a kind of filler, antiscour and the drought-enduring effect of water conservation are also bad, are only used for plant cultivation in seedling stage, are not suitable for roof greening.
Summary of the invention
It is an object of the invention to overcome weak point in prior art, it is provided that the production method of a kind of attapulgite mud compression Nutrition Soil.
The production method of attapulgite mud compression Nutrition Soil: first attapulgite and mud are carried out acidification, then the dispensing that attapulgite mud compresses Nutrition Soil is stirred, compresses, be packaged as finished product after microwave low temperature sterilization.
Attapulgite mud compression Nutrition Soil is made up of materials such as the Plant fiber after the mud after attapulgite clay after the acidify, acidifying, quick dissolved sodium silicate, polyvinyl alcohol, ferrous sulfate, peat, flower ceramsite, highly viscous attapulgite clay, biogas slurry, biogas residue, pulverizing, expanded vermiculite, expanded perlite and High hydrophilous resins.
Attapulgite has the dispersion of uniqueness, good colloidal nature and the higher absorbability such as saline and alkaline high temperature resistant, anti-, and has certain plasticity and cohesive force.Attapulgite clay after the acidify can adsorb the foreign odor taste in mud, heavy metal ion and carcinogen, the nutritional labeling in mud is kept not run off, be conducive to the growth promoter of plant, the present invention selects the attapulgite clay after pulverizing, fineness of the particles≤5 millimeter of attapulgite clay, water content≤15% of attapulgite clay.
Sulphuric acid selects concentration to be the concentrated sulphuric acid of 98%.
Quick dissolved sodium silicate is white powder material, can rapid solution in water, have that cohesive force is strong, intensity is higher, acid resistance, heat-resist, the feature of alkali resistance and poor water resistance.
Polyethenol series white solid, external form divide cotton-shaped, graininess, Powdered three kinds；Nonpoisonous and tasteless, graininess can be dissolved in 80--90 DEG C of water, pulverous other powders pre-dispersed after can dissolve at normal temperatures.There is good viscosity, polymerism, caking property and water-retaining property.
Hydroxypropyl methyl cellulose has thickening capabilities, salt discharge, pH stability, water-retaining property, dimensional stability, excellent film property and the feature such as resistance to enzyme, dispersibility and caking property widely.
Anhydrous slufuric acid ferrous iron is white powder, ferrous sulfate containing water of crystallization is pale green crystals, Herba Cladoniae rangiferinae is acidity by the ferrous sulfate of 10% aqueous solution, pH value is about 3.7, not only can neutralizing the alkalescence of attapulgite mud compression Nutrition Soil in the present invention, as the supplement of plant ferro element, there is physiological disturbance in preventing and treating plant because of iron deficiency, make leaves of plants color chlorosis, it is also possible to be used for killing lichen.
Sodium carbonate has the general character and the heat stability of salt, soluble in water, and its aqueous solution, in alkalescence, is used for adjusting attapulgite clay after the acidify pH value in the present invention.
For tackling the significant challenge of water resource environment, China will continue to strengthen the investment of urban infrastructure.The energy-conserving and environment-protective requirement, the continuation opening of municipal public use, the propelling of Environmental Industry policy and being gradually improved of investment and financing environment, wastewater treatment in China and the regeneration cause that day by day improve along with government will welcome Historic Opportunities for th e Development.
Containing a considerable amount of nitrogen, phosphorus, potassium and trace element in the mud of city domestic sewage treatment plant, through suitable PROCESS FOR TREATMENT, as cultivation medium soil, soil improvement material, also can as the raw material making fertilizer, the present invention selects the mud that city domestic sewage treatment plant discharges, water content≤90% of mud.
Highly viscous attapulgite clay is the attapulgite clay that the processing technique adopting and improving viscosity of attapulgite clay produces, attapulgite clay is after dispensing stirs, carrying out pulverizing in input grinding machine is highly viscous attapulgite clay powder, fineness of the particles≤0.074 millimeter.
Highly viscous attapulgite clay soil property is fine and smooth, has oily soapy, and light weight, property are crisp, fracture is conchoidal or irregular shape, and water absorption is strong, tool viscosity and plasticity time wet, the viscosity of highly viscous attapulgite clay powder >=2200mPa s, adhesive force is good, is conducive to the bonding between raw material.
Gravel attapulgite flower ceramsite rough surface porous, it it is a kind of lightweight, intensity is big, water absorption rate is high flower ceramsite, gravel attapulgite flower ceramsite can be immersed in water throughout the year and will not produce to burst apart, and constantly nutrition required for slow releasing flowers, the present invention selects the fineness of the particles of gravel attapulgite flower ceramsite to control at 1～3 millimeter.
Peat is also called the peat composed of rotten mosses or peat soil, and peat venting capability is good, light weight, water holding, fertilizer conservation, be conducive to microbial activities, strengthen biological property, nutritious, it is cultivation matrix, it it is again good soil mediator agent, and containing significantly high organic matter, humic acid and nutrition, the peat after pulverizing is to pulverize after being dried by peat, peat fineness of the particles≤2 millimeter after pulverizing, water content≤15% of peat.
Biogas slurry, through microbial decomposition, has killed harmful virus bacterium, containing the nutrient of various plants growth, abundant aminoacid and various growth hormone, vitamin etc., is a kind of quick-acting and the long-lasting liquid fertilizer having both and becoming thoroughly decomposed.
Biogas residue, rich in organic matter, humus, nitrogen, phosphorus, potassium, micronutrient element, several amino acids, enzyme and beneficial microbe, can play the effect well improveing soil, water content≤15% of biogas residue.
Plant fiber after pulverizing pulverizes after being dried by the plants such as the straw stalk of crops, wood flour, bamboo bits and leaves, plant fiber length≤15 millimeter after pulverizing, water content≤15% of Plant fiber.
Vermiculitum is after high-temperature roasting, and its volume energy expands rapidly several times to tens times, and the Vermiculitum after volumetric expansion expanded vermiculite, is one of the lightest in the world mineral；Expanded vermiculite is used as soil conditioner, can improve the structure of soil, and water storage preserves soil moisture, and improves the breathability of soil and the property of water-bearing, plays the multiple actions such as fertilizer conservation, water conservation, water storage, ventilative and mineral fertilizer.
Perlite is expanded and becomes a kind of lightweight, multifunctional novel shaped material.Having the features such as apparent density is light, heat conductivity is low, chemical stability is good, expanded perlite is fertilizer conservation, water conservation, aseptic, good permeability on agricultural, gardens.
The water absorbent rate of High hydrophilous resin is up to the hundreds times even thousands of times of own wt, and the present invention selects the water absorbent rate of High hydrophilous resin to be 100～300 times.
The technical scheme is that:
1, the production method of attapulgite mud compression Nutrition Soil:
(1) the dispensing that attapulgite mud compresses Nutrition Soil inputs stirring in the blender operated, and inputs boil down to attapulgite mud compression Nutrition Soil tablet in tablet machine after stirring, and attapulgite mud compresses the THICKNESS CONTROL of Nutrition Soil tablet at 5～30 millimeters；(2) attapulgite mud compresses Nutrition Soil tablet be transported in belt type microwave dry sterilizer and carry out low temperature sterilization and dry, temperature controls at 60～100 DEG C, time controls at 30～120 minutes, and sterilizing and dried attapulgite mud compress Nutrition Soil tablet water content≤15%；(3) Nutrition Soil tablet is compressed in sterilizing and dried attapulgite mud, it is transported in insulated sterilizing storehouse, utilize the waste heat of self in attapulgite mud compression Nutrition Soil tablet, proceed sterilizing and dry, after the compression Nutrition Soil tablet cooling of attapulgite mud, be packaged as the finished product of attapulgite mud compression Nutrition Soil.
The dispensing of attapulgite mud compression Nutrition Soil is made up of following component by weight percentage: mud 25～55% after attapulgite clay after the acidify 15～35%, acidifying, highly viscous attapulgite clay 2～15%, biogas slurry soak after gravel attapulgite flower ceramsite 2～15%, pulverize after peat 2～15%, biogas residue 2～15%, pulverize after Plant fiber 1～10%, expanded vermiculite 0.5～5%, expanded perlite 0.5～5% and High hydrophilous resin 0.1～5%.
2, attapulgite clay after the acidify dispensing is made up of following component by weight percentage: attapulgite clay after the acidify semi-finished product 90～99%, quick dissolved sodium silicate 0.1～5%, polyvinyl alcohol 0.1～5%, hydroxypropyl methyl cellulose 0.01～3% and sodium carbonate 0～3%；The production method of attapulgite clay after the acidify: attapulgite clay after the acidify dispensing is inputted pulverizing in grinding machine, and fineness of the particles≤0.074 millimeter, the powder after pulverizing is attapulgite clay after the acidify.
The half-finished production method of attapulgite clay after the acidify: (1) the dispensing of attapulgite clay mixture is inputted stirring in the blender operated, then dilute sulfuric acid is slowly added in attapulgite clay mixture carry out acidification；(2), by the attapulgite clay mixture after acidification, input twin rollers extruding is tablet, thickness≤3 millimeter of tablet；(3) tablet is transported to roasting in swinging drying oven, and roasting time is 1～3 hour, and sintering temperature controls at 250～350 DEG C, tablet water content≤5% after roasting, and the tablet after roasting is attapulgite clay after the acidify semi-finished product.
The dispensing of attapulgite clay mixture is made up of following component by weight percentage: attapulgite clay 97～99.5% and magnesium oxide 0.5～3%.The dispensing of acidification is made up of following component by weight percentage: attapulgite clay mixture 65～95% and dilute sulfuric acid 5～35%；The dispensing of dilute sulfuric acid is made up of following component by weight percentage: concentration is concentrated sulphuric acid 1～10% and the water 90～99% of 98%, concentration be 98% concentrated sulphuric acid percentage ratio be weight percentage.
3, the dispensing of mud acidification is made up of following component by weight percentage: mud 68～95%, attapulgite clay after the acidify 2～30% and ferrous sulfate 0.01～5%；The production method of the mud after acidifying: the dispensing of mud acidification is inputted stirring in the blender operated, it is transported in fermentation vat natural fermentation 3～14 days after stirring, sludge pH after natural fermentation controls 5.0～7.0, and the mud after natural fermentation process is the mud after acidifying.
4, the gravel attapulgite flower ceramsite that fineness of the particles is 1～3 millimeter is inputted immersion in biogas slurry pond, gravel attapulgite flower ceramsite is after soaking, can quickly absorb substantial amounts of biogas slurry, soak time controls at 30～60 minutes, take out the gravel attapulgite flower ceramsite after biogas slurry is soaked and carry out dry in the sun, gravel attapulgite flower ceramsite water content≤15% after dry in the sun.
The dispensing of gravel attapulgite flower ceramsite is made up of following component by weight percentage: highly viscous attapulgite clay powder 1～10%, attapulgite clay powder 5～25%, red bentonite in powder 5～20%, mud 45～65%, kieselguhr mine tailing 5～20% and powdered rice hulls 1～10%；
The production method of gravel attapulgite flower ceramsite: inputting Squeezinggranulator pelletize after (1) the dispensing of gravel attapulgite flower ceramsite being added stirrer for mixing, particle diameter controls at 8～25 millimeters, and particle length controls at 10～40 millimeters；(2) the granule after pelletize inputs internal heating type revolution roasting in kilns, and sintering temperature controls at 550～850 DEG C, and roasting time controlled at 1～6 hour；(3) being inputted by the granule after roasting and pulverize in disintegrating machine as gravel granule and sieve, fineness of the particles controls at 1～12 millimeter, for gravel attapulgite flower ceramsite.
Gravel attapulgite flower ceramsite is to adopt to be applied for " gravel attapulgite flower ceramsite " by the present inventor on November 10th, 2011, and Chinese patent Authorization Notice No. is: CN102503372B, authorized announcement date: on 04 17th, 2013.
5, highly viscous attapulgite clay is the attapulgite clay that the processing technique adopting and improving viscosity of attapulgite clay produces, it is characterised in that from the attapulgite clay of mining area exploitation, it is necessary to through the weathering of 30～120 days；Modification processing method is: calculate by weight percentage, takes the attapulgite clay after weathering 94～98%, is uniformly added into 2～6% sodium carbonate, in common input fermentation vat, adds clear water and carries out soaking ageing, and soak time is 72～120 hours；Take the attapulgite clay after immersion, input blender is stirred, and by the attapulgite clay after stirring, being extruded into thin slice through extruder, its THICKNESS CONTROL is at 0.5～2 millimeter, by attapulgite clay thin slice, carry out dry in the sun, the attapulgite clay thin slice after dry in the sun, its water content≤15%；Dispensing is calculated by weight percentage: attapulgite clay 94～98% after dry in the sun, High hydrophilous resin 0.5～5% and cellulose 0.5～3%, above-mentioned dispensing is stirred, and inputs in grinding machine and carry out pulverizing, fineness of the particles≤0.074 millimeter after stirring.
Above-mentioned production technology is to adopt to be applied for " improving the processing technique of viscosity of attapulgite clay " by the present inventor on June 20th, 2005, and Chinese patent Authorization Notice No. is: CN1317067C, authorized announcement date: on May 23rd, 2007.
The detection method of highly viscous attapulgite clay: take 28.0g attapulgite clay powder sample, add in the suspension cup of homogenizer, add 372g water, suspension cup is placed on homogenizer, stir 20 minutes under the rotating speed of 11000 revs/min, in the beaker pouring 250mL through high-speed stirred sample suspension into, NDJ-1 type rotating cylinder viscometer being used to carry out the viscosity of test suspension again, tested viscosity value >=2200mPa s is highly viscous attapulgite clay.
Heretofore described PCm is all weight percentage.
After the acidified process of attapulgite clay, pH value controls 5.0～7.0, it is possible to improve the utilization rate of attapulgite clay, not only can bring good economic benefit, environmental benefit and social benefit, and can realize turning waste into wealth.Attapulgite clay after the acidify has good thixotropy, plasticity and close-burning feature.
After the acidified process of mud, pH value controls 5.0～7.0, it is possible to improves the utilization rate of mud, is conducive to the nutrition in plant overall absorption mud, it is ensured that plant can grow by normal fast-growth.
The fresh sludge that city domestic sewage treatment plant produces is mostly in alkalescence, pH value is 8～10, after in fresh sludge, addition attapulgite clay after the acidify and ferrous sulfate carry out acidification, mud is faintly acid, and pH value controls 5.0～7.0, can natural fermentation under the normal temperature condition of temperature >=20 DEG C, in natural fermentation process, N P and K and Organic substance nutrient substance in mud obtain further raising, and foul smell significantly reduces, and its inherent moisture also will significantly decline.
Nutrition Soil tablet is compressed in sterilizing and dried attapulgite mud and is transported in insulated sterilizing storehouse, utilize waste heat to continue that attapulgite mud compresses Nutrition Soil and carry out sterilizing and dry, can continue to kill attapulgite mud compression Nutrition Soil stays excrement colibacillus group, roundworm egg, pathogenic bacteria and the insect such as nematicide, can also the weed seed in mud and peat be steamed dead, it is to avoid the germination again of weed seed.
Ferrous sulfate not only can the acid-base value of conditioning of mud, moreover it is possible to promotes chlorophyll formation, can prevent and treat the yellows that HUAMU causes because of iron deficiency, is the acid indispensable element of HUAMU of happiness.
Gravel attapulgite flower ceramsite is inputted in biogas slurry pond and soak, a large amount of biogas slurry inside gravel attapulgite flower ceramsite, will be sucked, to increase effective nutritional labeling of attapulgite mud compression Nutrition Soil；Gravel attapulgite flower ceramsite compresses at attapulgite mud can also play adjustment soil aggregate in Nutrition Soil, coordinate moisture and breathability, is conducive to crop root to stretch and normal growth.
The mud directly utilizing city domestic sewage treatment plant is primary raw material, the acidified attapulgite mud compression Nutrition Soil modifiying, stir, compress and producing after low temperature sterilization a kind of lamellar, small product size is than the volume-diminished less than 25% before compression, greatly reduce production and the cost of transportation of product, increase the economic benefit of enterprise.
The using method of attapulgite mud compression Nutrition Soil: attapulgite mud compression Nutrition Soil is put into after soaking 5 minutes in water, the attapulgite mud compression Nutrition Soil of lamellar is quickly reduced to loose Nutrition Soil, and the weight of the former compression Nutrition Soil of weight ratio of Nutrition Soil loose after water suction adds more than 5 times.
Attapulgite mud compression Nutrition Soil can be used for construction and the maintenance processes in green land in town system or forest land, suburb, as cultivation medium soil, soil improvement material, quality meets the national standard of " GB/T23486-2009 urban wastewater treatment firm sludge treatment afforestation shale ".
The production method adopting the present invention produces attapulgite mud compression Nutrition Soil; production technology is simple; individually mud need not be concentrated, recuperate under medical treatment, dehydration, stably, the course of processing of mummification or burning; whole production process does not have waste gas, dust and dry sound; be conducive to preserving the ecological environment, it is to avoid surrounding enviroment are caused secondary pollution.
Containing substantial amounts of nitrogen, phosphorus, potassium, organic matter and various trace elements in attapulgite mud compression Nutrition Soil, be that a kind of nutrition is complete, fertilizer efficiency is high, nontoxic, aseptic, harmless, odorless and the good high-quality Nutrition Soil of water retention property, it is provided that nutrient necessary to plant growing, do not use chemical fertilizer and chemical pesticide, reduce the harm of pathogen and pests on plants, be conducive to the normal growth of plant to grow.
Attapulgite mud compression Nutrition Soil can also be used to produce variously-shaped attapulgite clay compression planting brick.
The various garbages of a large amount of employing in the dispensing of attapulgite mud compression Nutrition Soil, not only contribute to improve resource utilization, turn waste into wealth, moreover it is possible to reduce land occupation, protection and environment purification, save the energy, reduction production cost, increase economic efficiency.
The production method of attapulgite mud compression Nutrition Soil is applicable to produce the attapulgite mud compression Nutrition Soil of different formulations.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
1, the production method of attapulgite mud compression Nutrition Soil: the dispensing that (1) attapulgite mud compress Nutrition Soil inputs stirring in the blender operated, inputting boil down to attapulgite mud compression Nutrition Soil tablet in tablet machine after stirring, the THICKNESS CONTROL of attapulgite mud compression Nutrition Soil tablet is at 22 millimeters；(2) attapulgite mud compresses Nutrition Soil tablet be transported in belt type microwave dry sterilizer and carry out low temperature sterilization and dry, temperature controls at 70～90 DEG C, time controls at 45 minutes, and sterilizing and dried attapulgite mud compress Nutrition Soil tablet water content≤15%；(3) Nutrition Soil tablet is compressed in sterilizing and dried attapulgite mud, it is transported in insulated sterilizing storehouse, utilize the waste heat of self in attapulgite mud compression Nutrition Soil tablet, proceed sterilizing and dry, after the compression Nutrition Soil tablet cooling of attapulgite mud, be packaged as the finished product of attapulgite mud compression Nutrition Soil.
The dispensing of attapulgite mud compression Nutrition Soil is made up of following component by weight percentage: mud 52% after attapulgite clay after the acidify 20%, acidifying, highly viscous attapulgite clay 7%, biogas slurry soak after gravel attapulgite flower ceramsite 6%, pulverize after peat 5%, biogas residue 4%, pulverize after Plant fiber 4%, expanded vermiculite 0.8%, expanded perlite 0.6% and High hydrophilous resin 0.6%.
2, attapulgite clay after the acidify dispensing is made up of following component by weight percentage: attapulgite clay after the acidify semi-finished product 97.5%, quick dissolved sodium silicate 1.2%, polyvinyl alcohol 0.8%, hydroxypropyl methyl cellulose 0.5% and sodium carbonate 0%；The production method of attapulgite clay after the acidify: attapulgite clay after the acidify dispensing is inputted pulverizing in grinding machine, and fineness of the particles≤0.074 millimeter, the powder after pulverizing is attapulgite clay after the acidify.
The half-finished production method of attapulgite clay after the acidify: (1) the dispensing of attapulgite clay mixture is inputted stirring in the blender operated, then dilute sulfuric acid is slowly added in attapulgite clay mixture carry out acidification；(2), by the attapulgite clay mixture after acidification, input twin rollers extruding is tablet, thickness≤3 millimeter of tablet；(3) tablet is transported to roasting in swinging drying oven, and roasting time is 2 hours, and sintering temperature controls at 300～350 DEG C, tablet water content≤5% after roasting, and the tablet after roasting is attapulgite clay after the acidify semi-finished product.
The dispensing of attapulgite clay mixture is made up of following component by weight percentage: attapulgite clay 98.5% and magnesium oxide 1.5%；The dispensing of acidification is made up of following component by weight percentage: attapulgite clay mixture 72% and dilute sulfuric acid 28%；The dispensing of dilute sulfuric acid is made up of following component by weight percentage: concentration is concentrated sulphuric acid 4% and the water 96% of 98%.
3, the dispensing of mud acidification is made up of following component by weight percentage: mud 82%, attapulgite clay after the acidify 17.4% and ferrous sulfate 0.6%；The production method of the mud after acidifying: the dispensing of mud acidification is inputted stirring in the blender operated, it is transported in fermentation vat natural fermentation 6 days after stirring, sludge pH after natural fermentation controls 5.5～7.0, and the mud after natural fermentation process is the mud after acidifying.
4, the gravel attapulgite flower ceramsite that fineness of the particles is 1～3 millimeter is inputted immersion in biogas slurry pond, gravel attapulgite flower ceramsite is after soaking, can quickly absorb substantial amounts of biogas slurry, soak time controls at 45 minutes, take out the gravel attapulgite flower ceramsite after biogas slurry is soaked and carry out dry in the sun, gravel attapulgite flower ceramsite water content≤12% after dry in the sun.
Embodiment 1:
1, fresh sludge takes from ×× sewage treatment plant of Jiangsu Province, and sludge moisture content is 82.4%, and mud has obvious stink, after acidified process and natural fermentation 7 days, pH value is 6.1, and attapulgite mud compression Nutrition Soil finished product water content is 9.4%, pH value is 6.4, it does not have stink.
2, weigh 100 grams of attapulgite mud compression Nutrition Soil finished products put into water soaks 5 minutes after take out, weighing after draining the water is 512 grams.
Embodiment 2:
1, fresh sludge takes from ×× sewage treatment plant of Gansu Province, and sludge moisture content is 80.1%, and mud has particularly apparent foul smell, after acidified process and natural fermentation 8 days, pH value is 6.4, and attapulgite mud compression Nutrition Soil finished product water content is 8.9%, pH value is 6.8, slightly puts stink.
2, weigh 100 grams of attapulgite mud compression Nutrition Soil finished products put into water soaks 5 minutes after take out, weighing after draining the water is 545 grams.
Embodiment testing result:
Taking above-mentioned attapulgite mud compression 2 samples of Nutrition Soil, detect according to the national standard of " GB/T23486-2009 urban wastewater treatment firm sludge treatment afforestation shale ", testing result is as follows:
Claims (5)
1. the production method of an attapulgite mud compression Nutrition Soil, it is characterized in that, (1) the dispensing that attapulgite mud compresses Nutrition Soil inputs stirring in the blender operated, and inputs boil down to tablet in tablet machine after stirring, and the THICKNESS CONTROL of tablet is at 5～30 millimeters；(2) being transported to by tablet in belt type microwave dry sterilizer and carry out low temperature sterilization and dry, temperature controls at 60～100 DEG C, and the time controls at 30～120 minutes, and sterilizing and dried attapulgite mud compress Nutrition Soil tablet water content≤15%；(3) Nutrition Soil tablet is compressed in sterilizing and dried attapulgite mud, it is transported in insulated sterilizing storehouse, utilize the waste heat of self in attapulgite mud compression Nutrition Soil tablet, proceed sterilizing and dry, after the compression Nutrition Soil tablet cooling of attapulgite mud, be packaged as attapulgite mud compression Nutrition Soil finished product；
The dispensing of described attapulgite mud compression Nutrition Soil is made up of following component by weight percentage: mud 25～55% after attapulgite clay after the acidify 15～35%, acidifying, highly viscous attapulgite clay 2～15%, biogas slurry soak after gravel attapulgite flower ceramsite 2～15%, pulverize after peat 2～15%, biogas residue 2～15%, pulverize after Plant fiber 1～10%, expanded vermiculite 0.5～5%, expanded perlite 0.5～5% and High hydrophilous resin 0.1～5%；
Attapulgite clay after the acidify dispensing is made up of following component by weight percentage: attapulgite clay after the acidify semi-finished product 90～99%, quick dissolved sodium silicate 0.1～5%, polyvinyl alcohol 0.1～5%, hydroxypropyl methyl cellulose 0.01～3% and sodium carbonate 0～3%；The production method of attapulgite clay after the acidify: attapulgite clay after the acidify dispensing is inputted pulverizing in grinding machine, and fineness of the particles≤0.074 millimeter, the powder after pulverizing is attapulgite clay after the acidify；
The half-finished production method of attapulgite clay after the acidify: (1) the dispensing of attapulgite clay mixture is inputted stirring in the blender operated, then dilute sulfuric acid is slowly added in attapulgite clay mixture carry out acidification；(2), by the attapulgite clay mixture after acidification, input twin rollers extruding is tablet, thickness≤3 millimeter of tablet；(3) tablet is transported to roasting in swinging drying oven, and roasting time is 1～3 hour, and sintering temperature controls at 250～350 DEG C, tablet water content≤5% after roasting, and the tablet after roasting is attapulgite clay after the acidify semi-finished product；
The dispensing of attapulgite clay mixture is made up of following component by weight percentage: attapulgite clay 97～99.5% and magnesium oxide 0.5～3%；The dispensing of acidification is made up of following component by weight percentage: attapulgite clay mixture 65～95% and dilute sulfuric acid 5～35%；The dispensing of dilute sulfuric acid is made up of following component by weight percentage: concentration is concentrated sulphuric acid 1～10% and the water 90～99% of 98%；
The dispensing of the mud after acidifying is made up of following component by weight percentage: mud 68～95%, attapulgite clay after the acidify 2～30% and ferrous sulfate 0.01～5%；The production method of the mud after acidifying: the dispensing of the mud after acidifying is inputted stirring in the blender operated, it is transported in fermentation vat natural fermentation 3～14 days after stirring, sludge pH after natural fermentation controls 5.0～7.0, and the mud after natural fermentation process is the mud after acidifying.
2. attapulgite mud compresses the production method of Nutrition Soil according to claim 1, it is characterized in that, gravel attapulgite flower ceramsite after biogas slurry immersion: the gravel attapulgite flower ceramsite that fineness of the particles is 1～3 millimeter is inputted in biogas slurry pond and soaks, gravel attapulgite flower ceramsite is after soaking, can quickly absorb substantial amounts of biogas slurry, soak time controls at 30～60 minutes, take out the gravel attapulgite flower ceramsite after biogas slurry is soaked and carry out dry in the sun, gravel attapulgite flower ceramsite water content≤15% after dry in the sun；
The dispensing of gravel attapulgite flower ceramsite is made up of following component by weight percentage: highly viscous attapulgite clay powder 1～10%, attapulgite clay powder 5～25%, red bentonite in powder 5～20%, mud 45～65%, kieselguhr mine tailing 5～20% and powdered rice hulls 1～10%；
The production method of gravel attapulgite flower ceramsite: inputting Squeezinggranulator pelletize after (1) the dispensing of gravel attapulgite flower ceramsite being added stirrer for mixing, particle diameter controls at 8～25 millimeters, and particle length controls at 10～40 millimeters；(2) the granule after pelletize inputs internal heating type revolution roasting in kilns, and sintering temperature controls at 550～850 DEG C, and roasting time controlled at 1～6 hour；(3) being inputted by the granule after roasting and pulverize in disintegrating machine as gravel granule and sieve, fineness of the particles controls at 1～12 millimeter, for gravel attapulgite flower ceramsite.
3. attapulgite mud compresses the production method of Nutrition Soil according to claim 1, it is characterised in that peat fineness of the particles≤2 millimeter after pulverizing, water content≤15% of peat, water content≤15% of biogas residue, plant fiber length≤15 millimeter after pulverizing, water content≤15% of Plant fiber.
4. attapulgite mud compresses the production method of Nutrition Soil according to claim 1, it is characterised in that fineness of the particles≤5 millimeter of attapulgite clay, water content≤15% of attapulgite clay.
5. attapulgite mud compresses the production method of Nutrition Soil according to claim 1, it is characterised in that water content≤90% of mud.
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