CN101898909A - Method for producing circular granular potassium and organic-inorganic compound fertilizer through organic waste liquor - Google Patents
Method for producing circular granular potassium and organic-inorganic compound fertilizer through organic waste liquor Download PDFInfo
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- CN101898909A CN101898909A CN2009102033102A CN200910203310A CN101898909A CN 101898909 A CN101898909 A CN 101898909A CN 2009102033102 A CN2009102033102 A CN 2009102033102A CN 200910203310 A CN200910203310 A CN 200910203310A CN 101898909 A CN101898909 A CN 101898909A
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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
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- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
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Abstract
The invention relates to a method for producing circular granular potassium and organic-inorganic compound fertilizer through organic waste liquor, which comprises the following steps of: (1) neutralizing organic acidic wastewater by using synthesis ammonia until the wastewater is neutral; (2) adding bedding materials such as sylvite, urea, ammonium phosphate and the like in a 'tumbling and pelleting' device according to the requirement of a formula; (3) sprinkling neutral organic liquor obtained by the step (1) on a charge returning bed in a pelletizer to prepare a semi-finished product; and (4) drying, sieving and cooling the semi-finished product obtained by the step (3) to obtain a product. The method has the advantages that: 1, the produced circular granular potassium used as basic fertilizer for blending fertilizer is superior to flaky granular potassium produced by adopting the extrusion technology at present; and 2, the circular granular potassium and the organic-inorganic compound fertilizer which are produced by adopting the technology solve the problems that organic charring decomposition is easy to occur and the emission of tail gas does not reach the standard in a process that production enterprises of glutamic acid and monosodium glutamate produce the organic fertilizer by using the organic acidic wastewater and adopting 'tumbling, spouting and pelleting'.
Description
Technical field
The present invention relates to a kind of organic liquid waste and produce the method for circular granular potassium and organic-inorganic compound mixed fertilizer, particularly a kind of organic acidity waste water that adopts manufacturing enterprises such as L-glutamic acid, monosodium glutamate, Repone K (or vitriolate of tartar), urea, ammonium phosphate etc. are the main circular granular potassium and the method for organic-inorganic compound mixed fertilizer for raw material production contains potassium; Belong to fertilizer field.
Background technology
The developmental stage of (compound) fertilizer from the straight fertilizer to the compound has been passed through in the production of chemical fertilizer and use, has developed into the stage of organic-inorganic complex fertilizer from inorganic complex fertilizer, and has begun to have entered into the stage of fertilization compositions based on earth measurement.Organic-inorganic complex fertilizer, be with the raw materials for production of inorganic nutrients such as nitrogenous, phosphorus, potassium with containing organic organic fertilizer production raw material, the fertilizer of making by " compound " technology; Fertilization compositions based on earth measurement is the fertility situation according to nutritional needs and the soil of plant, produces and use the fertilizer of proper ratio nutrient.
Independent application of organic fertilizers, though organic fertilizer contains more organic matter, contained N, P, K nutrient are lower, can not be because of organic matter directly by plant absorbing, so fertilizer efficiency is slow, use can't be satisfied the growth needs of farm crop separately; Use inorganic fertilizer separately, though mineral manure is compared with organic fertilizer, have nutrient height, fertilizer efficiency fast, store and use advantages such as convenient, the nutrients ratio of soil can also be regulated, promote the crop stable and high yields, but the long-term application inorganic fertilizer organic content wretched insufficiency in the soil can be made, cause soil compaction, water-permeable, ventilation property and light transmission variation are ploughed and ecotope is damaged, the sustainable development of influence agricultural.Produce and use organic-inorganic compound mixed fertilizer and can solve that single organic fertilizer nutrient is low, fertilizer efficiency waits drawback slowly, can solve again and singly execute the shortcoming that inorganic fertilizer can make soil and environment be damaged.Organic-inorganic complex fertilizer has overcome the shortcoming that fertilizer and inorganic fertilizer are used separately, has given full play to the advantage of the two, can guarantee the crop stable and high yields, also can improve the quality of crop simultaneously, improves soil property and environment.At present, the production technology of organic-inorganic complex fertilizer mainly is the inorganic fertilizer raw material with nitrogenous, phosphorus, potassium, and contains the organic just fertilizer raw material such as excrement of fowl that holds, and produces by extrusion or " compound " technology.
Straight fertilizer, the compound manure of industrialized mass because of the kind limited amount of product, are difficult to satisfy preferably the needs of fertilization compositions based on earth measurement at present.The production method that a kind of being referred to as " blending " fertilizer is arranged, promptly according to the requirement of nutrient proportioning, with solid base fertilizers such as the various nitrogen that obvious chemical reaction, granularity and circularity basically identical do not take place, phosphorus, potassium is raw material, and the method by blending is mixed with the fertilizer that nutrient is evenly distributed.This fertilizer course of processing is simple, and plant investment expense and processing charges are lower, is a kind of fertilizer variety that is very suitable for fertilization compositions based on earth measurement.This fertilizer when production, accumulating, use, extremely emphasize particle size, severe and the circularity of various base fertilizers basically identical, make the phenomenon that occurs caking, pulverizing and low moisture absorption point after the unlikely generation blending.
Produce the bulk blended fertilizer kind that is suitable for the fertilization compositions based on earth measurement demand most, the agglomeration technique of the circular granular simple substance base fertilizer of present needed nitrogenous fertilizer, phosphate fertilizer is very ripe, and the base fertilizer of potassium, what generally adopt at present both at home and abroad is the extruder grain technology, the particle potassium product that this technology is produced, be the irregular particle of a kind of sheet (ability of single series production equipment is less, is generally ten thousand tons/year of 1-5).
The base fertilizer of " blending " potassium that fertilizer uses in the existing market, because what generally use is the irregular particle of sheet that adopts the extruder grain explained hereafter, the segregation layering in storage and transport process, occurs easily, make nutrient difference big (the sale radius of U.S.'s restriction " blending " fertilizer product should in 60 kilometers).For the base fertilizer that overcomes potassium in " blending " fertiliser production is the defective of sheet irregular particle, domestic in recent years existing utilize rotary drum granulator by steam with powdery sylvite and clay reunion process for granulating, this method generally needs relatively large steam and clay, production cost is higher, the adding of clay has reduced the content of effective constituent potassium, is not suitable for scale operation; Also have by adding high polymer binder to be configured to the aqueous solution powdered sylvite is carried out agglomeration granulation, because of the binding agent costliness, granulation need use steam, and sylvite needs operations such as further pulverizing, and production cost is also higher, also is difficult to realize industrialization.Therefore, provide a kind of technology rationally and the production method of the lower circular granular potassium of production cost just become this technical field and be badly in need of the technical barrier that will solve.
The manufacturing enterprise of L-glutamic acid, monosodium glutamate in process of production, can produce the acid waste water that contains a certain amount of organic matter in a large number, average every day need be discharged about 2000 tons of organic acidity waste water that contain organism about 20% by general 200,000 tons the L-glutamic acid or the enterprise of msg product of producing per year.The manufacturing enterprise of L-glutamic acid, monosodium glutamate is to containing the treatment process of organic acid waste water at present, be that organic acidity waste water is concentrated to water content about 40% with steam heating through multiple-effect evaporation at large, " rotary drum spray granulating " technology that adopts granulation-drying to be integrated is then produced the organic fertilizer that contains certain organic matter and low concentration inorganic nutrients.But one of greatest drawback of this technology is exactly granulation-drying temperature has relatively high expectations, and dry hot air temperature is up to 450-600 ℃.Thus, the one, in granulation-drying process, be easy to generate organic decomposition charing, influence the quality of fertilizer; The 2nd, the organism that is decomposed in granulation-drying process is difficult to by washing recovery with water, and granulation-dry discharge tail gas is difficult to satisfy environmental requirement.Therefore, provide a kind of technology reasonable, and the manufacturing enterprise that can solve L-glutamic acid, monosodium glutamate will contain organic acid waste water produce be prone to organic charing decomposition in the process of fertilizer, granulation-dried tail gas discharging is difficult to problem up to standard, also is that this technical field is badly in need of the technical barrier that will solve.
Summary of the invention
Purpose of the present invention, the one, at " blending " fertilizer that is suitable for most at present fertilization compositions based on earth measurement, the base fertilizer of the potash fertilizer that uses generally is the defective that adopts the platy shaped particle potash fertilizer existence of extruder grain production aborning; The 2nd, will contain organic acid waste water at the manufacturing enterprise of L-glutamic acid, monosodium glutamate and produce and be prone to organic charing in the process of fertilizer and decompose, both influenced the quality of fertilizer, cause problems such as granulation-dried tail gas discharging is not up to standard again; Make full use of and contain organic liquor (hereinafter to be referred as " organic liquor ") the physical property that viscosity big of organic acid waste water after concentrating in L-glutamic acid, the glutamate production process, provide a kind of technology rationally and the production method of the lower circular granular potash fertilizer of production cost.Simultaneously, use this technology,, add the raw materials for production of a certain amount of nitrogenous, phosphorus, potassium, can be used to produce organic-inorganic complex fertilizer should " organic liquor " by adjusting prescription.
Above-mentioned purpose of the present invention reaches by the following technical programs:
A kind of organic liquid waste is produced the method for circular granular potassium and organic-inorganic compound mixed fertilizer, and its step is as follows:
(1) acid waste water that contains organic matter that the manufacturing enterprise of L-glutamic acid, monosodium glutamate is discharged, adopting steam to be concentrated to water content by multiple-effect evaporation is 30-40%, temperature is 70-80 ℃, forms good fluidity, the concentrated organic liquor that viscosity is more suitable (hereinafter to be referred as " organic liquor ").
(2) " organic liquor " fed a certain amount of ammonia synthesis reaction in the normal pressure neutralizing well and make neutral organic liquor (according to the product specification of being produced, also can in " organic liquor ", add certain amount of urea and form common solution), or " organic liquor " directly sent in the tubular reactor, feed a certain amount of ammonia synthesis reaction simultaneously and make neutral organic liquor.
When (3) producing circular granular potassium, in " rotary drum granulator ", drop into sylvite (Repone K or vitriolate of tartar) bed material; When producing organic-inorganic compound mixed fertilizer, in " rotary drum granulator " by the dry material of solid material such as prescription requirement input sylvite (Repone K or vitriolate of tartar), urea, ammonium phosphate and " organic liquor " as bed material.The 3-5 that the circular flow of bed material reaches " organic liquor " instantaneous delivery that will drop into the drum granulating device doubly, the starting granulation returning charge recycle system, and system is preheated to the bed material temperature reaches 60-70 ℃.
(4) step (2) gained is accounted for the neutral organic liquor of raw material gross weight (butt, as follows) 10.0-75.0%, send in described " rotary drum granulator " that bed material is housed of step (3) by shurry pump; Or step (1) gained accounted for raw material gross weight (butt; as follows) 10.0-75.0% " organic liquor "; send into tubular reactor by shurry pump pressurization, add a certain amount of ammonia synthesis reaction simultaneously and enter to the neutrality in described " rotary drum granulator " that bed material is housed of step (3).From the neutral organic liquor of step poly-(2), or from " organic liquor " in step poly-(1) and through the neutral organic liquor behind tubular reactor and ammonia synthesis reaction, on the returning charge bed in shower nozzle is sprayed at tablets press.Meanwhile to the returning charge recycle system input of drum granulating device account for raw material gross weight 10.0-90.0% sylvite (Repone K or vitriolate of tartar), account for raw material gross weight 0-15% ammonium phosphate when circular granular potassium (produce is zero), account for the urea (can be zero when producing circular granular potassium) of raw material gross weight 0-30%; by coating and bonding reunion granulating, formation temperature is 70-80 ℃, the semi-product material of water content 5-10% in tablets press.
(5) semi-product material of step (4) gained is sent into drying machine, drying machine is 120-350 ℃ from the hot air temperature of roasting kiln, and the temperature of dry back product is 70-90 ℃; Dried material is sent into vibratory screening apparatus and is sieved, and the aperture of the levels screen cloth of vibratory screening apparatus is respectively 4.75 and 2.00mm; Large granular materials after the screening is sent into the returning charge recycle system with the fine powder of screening after fragmentation, the qualified particle after the screening is sent into cooler, is cooled to 40-50 ℃, obtains circular granular potassium or organic-inorganic compound mixed fertilizer that particle diameter is 2-4.75mm.
A kind of optimal technical scheme is characterized in that backing material formula described in the described step (3): when producing circular potassium is the Repone K (60%K of 600-900kg/t
2O) or vitriolate of tartar (50%K
2O), " organic liquor " dry material (water content 1-2%) 100-400kg/t; When producing organic-inorganic compound mixed fertilizer is the Repone K (60%K of 100-150kg/t
2O) or vitriolate of tartar (50%K
2O), the urea of 10-300kg/t, the ammonium phosphate of 100-150kg/t (11%N, 44%P
2O
5), " organic liquor " dry material (water content 1-2%) of 430-760kg/t.
A kind of optimal technical scheme is characterized in that: " organic liquor " contains described in the described step (1): organic matter=15-35% (butt).
Beneficial effect:
The circular granular potassium that the present invention is prepared had both contained higher K
2Inorganic nutrients such as O also contain the required organic nutrients of plant such as a certain amount of organic matter; This product both can be used separately according to plant and soil fertility situation, more can use with blending such as particle nitrogen fertilizer, granulated phosphate fertilizer or composite fertilizers, can satisfy the market requirement of fertilization compositions based on earth measurement to greatest extent to fertilizer variety; The present invention produces the acid waste water spissated " organic liquor " that contains organic matter in process of production with the manufacturing enterprise of L-glutamic acid, monosodium glutamate, reunion technology by " drum granulating " is produced circular granular potassium, can fundamentally solve " rotary drum spray granulating " technology that the manufacturing enterprise of present L-glutamic acid, monosodium glutamate generally adopts granulation-drying to be integrated, because of required granulating and drying temperature height, easily produce organic decomposition charing, both influenced the fertilizer quality, again problem of environment pollution caused.The present invention is with " organic liquor ", the organic-inorganic compound mixed fertilizer that reunion technology by " drum granulating " is produced, be a kind of inorganic nutrients such as N, P, K that both contained, contain a certain amount of organic matter again, can guarantee the crop stable and high yields, simultaneously can improve the quality of crop again, improve the fertilizer of soil property and environment.
The technology of circular granular potassium of the present invention and organic-inorganic compound mixed fertilizer is easy to realize large-scale industrial production, can produce favorable economic benefit and social benefit.
The present invention will be further described below by embodiment, but and do not mean that limiting the scope of the invention.
Embodiment:
Embodiment 1: " 1-0-52 " contains the production that potassium is master's circular granular potassium
Composition of raw materials is: (wherein contain organic matter=35% (butt), nitrogenous=6% contains H to " organic liquor ": 200kg/t
2SO
4%=2.5, moisture %=40.0); Repone K: 880kg/t (60%K
2O, H
2O%1).Production stage is as follows:
(1), in " organic liquor " groove of drum granulating device, add 70-80 ℃ of organic liquor from the organic liquid waste enrichment process, and starting stirring rake feeds 0.87% the synthetic ammonia (NH of " organic liquor " amount
3) with " organic liquor " in H
2SO
4Reaction is neutralized to neutrality with it.
(2), in rotary drum granulator, drop into the Repone K bed material, the circular flow of bed material reaches 4-5 times of organic liquor (butt) instantaneous delivery that will drop into the drum granulating device, the starting granulation returning charge recycle system, and system is preheated to the bed material temperature reaches 60-70 ℃;
(3), start organic liquid pump, with in the organic liquid bath of step (1) through being neutralized to the neutral organic liquor, press the flow of 15.13t/h, send to " drum granulating " device; Or in the tubular reactor of " drum granulating " device, feed the synthetic ammonia of 0.13t/h when sending into " organic liquor ", with the H in " organic liquor " by the flow of every 15.00t/h
2SO
4Reaction is neutralized to neutrality with it.Neutral organic liquor after the neutralization is sprayed on the returning charge bed by shower nozzle, presses composition of raw materials is pressed 66.00t/h in the returning charge recycle system of " drum granulating " device flow input Repone K simultaneously.The drop temperature of tablets press is 70-80 ℃.
(4), the material after the granulation, drying (drying machine is 120-350 ℃ from the hot air temperature of roasting kiln, and the temperature of dry back product is 70-90 ℃, and the residence time of material in drying machine is about 50 minutes); Dried material is sent into vibratory screening apparatus and is sieved, and the aperture of the levels screen cloth of vibratory screening apparatus is respectively 4.75 and 2.00mm; Large granular materials after the screening is after fragmentation, fine powder with screening is sent into the returning charge recycle system, the product of the qualified particle after the screening (particle diameter is 2-4.75mm) is sent into cooler (residence time is about 20 minutes), and cooled product (temperature is 40-50 ℃) is sent to packing storage operation.
The product specification of producing by this composition of raw materials is (1-0-52): K
2O%=52.38; N%=1.33; Organic %=4.17; H
2O%=1.49; Granularity (2-4.75mm%) 〉=90; Granule strength 〉=15N.
The outstanding advantage of the circular granular potassium of the embodiment of the invention is:
1. contain 53.71% K in this product
2Outside the inorganic nutrients of O and N, also contain 4.17% organic matter, it is a kind of nitrogen-potassium fertilizer that potassium is master's high-quality and efficient organic-inorganic compoiste that contains, according to plant and soil fertility situation, both can use separately, more can use, can satisfy the market requirement of fertilization compositions based on earth measurement to greatest extent fertilizer variety with blending such as particle nitrogen fertilizer, granulated phosphate fertilizer or composite fertilizers.
2. this product compares with the platy shaped particle potash fertilizer that generally is used as bulk blended fertilizer at present both at home and abroad as the base fertilizer of potassium in the Bulk Blending Fertilizer, and product is a circular granular, can overcome bulk blended fertilizer and easily produce the defective that the segregation layering influences quality product.
3. after the manufacturing enterprise of this product and present domestic L-glutamic acid, monosodium glutamate will contain organic acid waste water and concentrate, the technology that " the rotary drum spray granulating " that is integrated by granulation-drying produced fertilizer relatively, because of " drum granulating " required prilling temperature low (70-80 ℃), can fundamentally solve " rotary drum spray granulating " because of granulating and drying temperature height (450-600 ℃), organic matter is prone to a large amount of decomposition charings in granulation-drying process, both influenced the fertilizer quality, again problem of environment pollution caused.
4. the production technology of this product, compare (the single series unit scale is ten thousand tons/year of 1-5) with the base fertilizer that generally is employing extruder grain production sheet potassium at present both at home and abroad, to contain organic acid waste water with the manufacturing enterprise of present domestic L-glutamic acid, monosodium glutamate and concentrate technology that the back produces organic fertilizer product relatively (industrial scale of single series device is ten thousand tons/year of 5-10), production equipment can be realized maximizing (industrial scale of single series device can reach ten thousand tons/year of 60-100), can produce scale and benefit preferably.
Embodiment 2: " 6-0-36 " contains the production that potassium is master's circular granular potassium
Composition of raw materials is: (wherein contain organic matter=15% (butt), nitrogenous=10% contains H to " organic liquor ": 650kg/t
2SO
4%=2.5; Moisture %=40.0); Repone K: 600kg/t (60%K
2O, H
2O%1).Production stage is as follows:
(1), in " organic liquor " groove of drum granulating device, add 70-80 ℃ of organic liquor from the organic liquid waste enrichment process, and starting stirring rake feeds 0.87% the synthetic ammonia (NH of " organic liquor " amount
3) with " organic liquor " in H
2SO
4Reaction is neutralized to neutrality with it.
(2), in rotary drum granulator, drop into Repone K, the 4-5 that the circular flow of bed material reaches organic liquor (butt) instantaneous delivery that will drop into the drum granulating device doubly, the starting granulation returning charge recycle system, and system is preheated to the bed material temperature reaches 60-70 ℃;
(3), start organic liquid pump, with in the organic liquid bath of step (1) through being neutralized to the neutral organic liquor, press the flow of 49.17t/h, send to the drum granulating device; Or in the tubular reactor of drum granulating device, feed the synthetic ammonia of 0.42t/h when sending into " organic liquor ", with the H in " organic liquor " by the flow of every 48.75t/h
2SO
4Reaction is neutralized to neutrality with it.Neutral organic liquor after the neutralization is sprayed on the returning charge bed by shower nozzle, presses composition of raw materials is pressed 45.47t/h in the returning charge recycle system of drum granulating device flow input Repone K simultaneously.The drop temperature of tablets press is 70-80 ℃.
(4), the material after the granulation, drying (drying machine is 120-350 ℃ from the hot air temperature of roasting kiln, and the temperature of dry back product is 70-90 ℃, and the residence time of material in drying machine is about 50 minutes); Dried material is sent into vibratory screening apparatus and is sieved, and the aperture of the levels screen cloth of vibratory screening apparatus is respectively 4.75 and 2.00mm; Large granular materials after the screening is after fragmentation, fine powder with screening is sent into the returning charge recycle system, the product of the qualified particle after the screening (particle diameter is 2-4.75mm) is sent into cooler (residence time is about 20 minutes), and cooled product (temperature is 40-50 ℃) is sent to packing storage operation.
The product specification of producing by this composition of raw materials is (6-0-36): K
2O%=35.83; N%=6.47; Organic %=5.82; H
2O%=1.51; Granularity (2-4.75mm%) 〉=90; Granule strength 〉=20N.
Embodiment 3: the production of the organic-inorganic compound mixed fertilizer of " 20-5-8, organic 15% "
Composition of raw materials is: (wherein contain organic matter=35% (butt), nitrogenous=6% contains H to " organic liquor ": 716.67kg/t
2SO
4%=2.5; Moisture %=40.0); Urea (%N46, H
2O%1) 299.85kg/t; MAP (%N11, P
2O
5%44, H
2O%2) 136kg/t; Repone K: 135kg/t (60%K
2O, H
2O%1).Production stage is as follows:
(1), in " organic liquor " groove of drum granulating device, add 70-80 ℃ of organic liquor from the organic liquid waste enrichment process, and starting stirring rake feeds 0.87% the synthetic ammonia (NH of " organic liquor " amount
3) with " organic liquor " in H
2SO
4Reaction is neutralized to neutrality with it.
(2), in rotary drum granulator, make bed material by prescription requirements input Repone K, urea, MAP and through the dry material that is neutralized to neutral organic liquor; the circular flow of bed material reaches 4-5 times of organic liquor (butt) instantaneous delivery that will drop into the drum granulating device; the starting granulation returning charge recycle system, and system is preheated to the bed material temperature reaches 60-70 ℃.
(3), start organic liquid pump, with in the organic liquid bath of step (1) through being neutralized to the neutral organic liquor, press the flow of 54.22t/h, send to the drum granulating device; Or in the tubular reactor of drum granulating device, feed the synthetic ammonia of 0.47t/h when sending into " organic liquor ", with the H in " organic liquor " by the flow of every 53.75t/h
2SO
4Reaction is neutralized to neutrality with it.Organic liquor after the neutralization is sprayed on the returning charge bed by shower nozzle, presses composition of raw materials simultaneously and presses the flow input Repone K of 10.13t/h, urea and the 10.20t/hMAP of 22.49t/h in the returning charge recycle system of drum granulating device.The drop temperature of tablets press is 70-80 ℃.
(4), the material after the granulation, drying (drying machine is 120-350 ℃ from the hot air temperature of roasting kiln, and the temperature of dry back product is 70-90 ℃, and the residence time of material in drying machine is about 50 minutes); Dried material is sent into vibratory screening apparatus and is sieved, and the aperture of the levels screen cloth of vibratory screening apparatus is respectively 4.75 and 2.00mm; Large granular materials after the screening is after fragmentation, fine powder with screening is sent into the returning charge recycle system, the product of the qualified particle after the screening (particle diameter is 2-4.75mm) is sent into cooler (residence time is about 20 minutes), and cooled product (temperature is 40-50 ℃) is sent to packing storage operation.
The product specification of producing by this composition of raw materials is (20-5-8): N%=19.72; P
2O
5%=5.87; K
2O%=7.95; Organic %=14.76; H
2O%=1.90; Granularity (2-4.75mm%) 〉=90; Granule strength 〉=25N.
Example 4: the production of the organic-inorganic compound mixed fertilizer of " 15-4-8, organic 15% "
Composition of raw materials is: (wherein contain organic matter=20% (butt), nitrogenous=10% contains H to " organic liquor ": 1250kg/t
2SO
4%=2.5; Moisture %=40.0); Urea (%N46, H
2O%1): 14.71kg/t; MAP (%N11, P
2O
5%44, H
2O%2): 92.77kg/t; Repone K: 135kg/t (60%K
2O, H
2O%1).Production stage is as follows:
(1), in " organic liquor " groove of drum granulating device, add 70-80 ℃ of organic liquor from the organic liquid waste enrichment process, and starting stirring rake feeds 0.87% the synthetic ammonia (NH of " organic liquor " amount
3) with " organic liquor " in H
2SO
4Reaction is neutralized to neutrality with it.
(2), in rotary drum granulator, drop into Repone K, urea, MAP and make bed material through the dry material that is neutralized to neutral organic liquor, the circular flow of bed material reaches 4-5 times of organic liquor (butt) instantaneous delivery that will drop into the drum granulating device, the starting granulation returning charge recycle system, and system is preheated to the bed material temperature reaches 60-70 ℃;
(3), start organic liquid pump, with in the organic liquid bath of step (1) through being neutralized to the neutral organic liquor, press the flow of 94.57t/h, send to the drum granulating device; Or in the tubular reactor of drum granulating device, feed the synthetic ammonia of 0.82t/h when sending into " organic liquor ", with the H in " organic liquor " by the flow of every 93.75t/h
2SO
4Reaction is neutralized to neutrality with it.Organic liquor after the neutralization is sprayed on the returning charge bed by shower nozzle, presses composition of raw materials is pressed 10.13t/h in the returning charge recycle system of drum granulating device flow input chlorination, the urea of 1.10t/h and the MAP of 6.96t/h simultaneously.The drop temperature of tablets press is 70-80 ℃.
(4), the material after the granulation, drying (drying machine is 120-350 ℃ from the hot air temperature of roasting kiln, and the temperature of dry back product is 70-90 ℃, and the residence time of material in drying machine is about 50 minutes); Dried material is sent into vibratory screening apparatus and is sieved, and the aperture of the levels screen cloth of vibratory screening apparatus is respectively 4.75 and 2.00mm; Large granular materials after the screening is after fragmentation, fine powder with screening is sent into the returning charge recycle system, the product of the qualified particle after the screening (particle diameter is 2-4.75mm) is sent into cooler (residence time is about 20 minutes), and cooled product (temperature is 40-50 ℃) is sent to packing storage operation.
The product specification of producing by this composition of raw materials is (15-4-8): N%=14.82; P
2O
5%=4.01; K
2O%=7.95; Organic %=14.73; H
2O%=1.80; Granularity (2-4.75mm%) 〉=90; Granule strength 〉=25N.
Claims (3)
1. an organic liquid waste is produced the method for circular granular potassium and organic-inorganic compound mixed fertilizer
(1) acid waste water that contains organic matter that the manufacturing enterprise of L-glutamic acid, monosodium glutamate is discharged, adopting steam to be concentrated to water content by multiple-effect evaporation is 30-40%, temperature is 70-80 ℃, forms good fluidity, the concentrated organic liquor that viscosity is more suitable (hereinafter to be referred as " organic liquor ").
(2) " organic liquor " fed a certain amount of ammonia synthesis reaction in the normal pressure neutralizing well and make neutral organic liquor (according to the product specification of being produced, also can in " organic liquor ", add certain amount of urea and form common solution), or " organic liquor " directly sent in the tubular reactor, feed a certain amount of ammonia synthesis reaction simultaneously and make neutral organic liquor.
When (3) producing circular granular potassium, in " rotary drum granulator ", drop into sylvite (Repone K or vitriolate of tartar) bed material; When producing organic-inorganic compound mixed fertilizer, in " rotary drum granulator " by the dry material of solid material such as prescription requirement input sylvite (Repone K or vitriolate of tartar), urea, ammonium phosphate and " organic liquor " as bed material.The 3-5 that the circular flow of bed material reaches " organic liquor " instantaneous delivery that will drop into the drum granulating device doubly, the starting granulation returning charge recycle system, and system is preheated to the bed material temperature reaches 60-70 ℃.
(4) step (2) gained is accounted for the neutral organic liquor of raw material gross weight (butt, as follows) 10.0-75.0%, send in described " rotary drum granulator " that bed material is housed of step (3) by shurry pump; Or step (1) gained accounted for raw material gross weight (butt; as follows) 10.0-75.0% " organic liquor "; send into tubular reactor by shurry pump pressurization, add a certain amount of ammonia synthesis reaction simultaneously and enter to the neutrality in described " rotary drum granulator " that bed material is housed of step (3).From the neutral organic liquor of step poly-(2), or from " organic liquor " in step poly-(1) and through the neutral organic liquor behind tubular reactor and ammonia synthesis reaction, on the returning charge bed in shower nozzle is sprayed at tablets press.Meanwhile to the returning charge recycle system input of drum granulating device account for raw material gross weight 10.0-90.0% sylvite (Repone K or vitriolate of tartar), account for raw material gross weight 0-15% ammonium phosphate when circular granular potassium (produce is zero), account for the urea (can be zero when producing circular granular potassium) of raw material gross weight 0-30%; by coating and bonding reunion granulating, formation temperature is 70-80 ℃, the semi-product material of water content 5-10% in tablets press.
(5) semi-product material of step (4) gained is sent into drying machine, drying machine is 120-350 ℃ from the hot air temperature of roasting kiln, and the temperature of dry back product is 70-90 ℃; Dried material is sent into vibratory screening apparatus and is sieved, and the aperture of the levels screen cloth of vibratory screening apparatus is respectively 4.75 and 2.00mm; Large granular materials after the screening is sent into the returning charge recycle system with the fine powder of screening after fragmentation, the qualified particle after the screening is sent into cooler, is cooled to 40-50 ℃, obtains circular granular potassium or organic-inorganic compound mixed fertilizer that particle diameter is 2-4.75mm.
2. a kind of organic liquid waste according to claim 1 is produced the method for circular granular potassium and organic-inorganic compound mixed fertilizer, it is characterized in that backing material formula described in the described step (3): when producing circular granular potassium is the Repone K (60%K of 600-900kg/t
2O) or vitriolate of tartar (50%K
2O), " organic liquor " dry material (water content 1-2%) 100-400kg/t; When producing organic-inorganic compound mixed fertilizer is the Repone K (60%K of 100-150kg/t
2O) or vitriolate of tartar (50%K
2O), the urea of 10-300kg/t, the ammonium phosphate of 100-150kg/t (11%N, 44%P
2O
5), " organic liquor " dry material (water content 1-2%) of 430-760kg/t.
3. a kind of organic liquid waste according to claim 1 is produced the method for circular granular potassium and organic-inorganic compound mixed fertilizer, it is characterized in that " organic liquor " contains described in the described step (1): organic matter=15-35% (butt).
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