CN100475744C - Method for producing agricultural fertilizer by using waste liquid of monosodium glutamate - Google Patents
Method for producing agricultural fertilizer by using waste liquid of monosodium glutamate Download PDFInfo
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- CN100475744C CN100475744C CNB2007101075734A CN200710107573A CN100475744C CN 100475744 C CN100475744 C CN 100475744C CN B2007101075734 A CNB2007101075734 A CN B2007101075734A CN 200710107573 A CN200710107573 A CN 200710107573A CN 100475744 C CN100475744 C CN 100475744C
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- monosodium glutamate
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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Abstract
The invention discloses a method for producing farm fertilizer by monosodium glutamate tail washings with a primary raw materials: monosodium glutamate tail washings containing a solid content of 8-50%, active sludge with an organic matter content more than 50%, sulphuric acid with a concentration of 90-98%, potassium chloride with a pureness of 95-98%, powdered monoammonium phosphate with a total nutrition of 55-60%, liquid ammonia. The potasium bisulfate is got by a reaction of potassium chloride and concentrated sulfuric acid. A mixing ammonium liquid is obtained by introducing the powdered monoammonium phosphate and active sludge into the monosodium glutamate tail washings. The mixing ammonium liquid mixes with the potasium bisulfate to form mixed acid. Slurry is produced by feeding the gas ammonia into the mixed acid for a neutralization reaction. The slurry produces the compound fertilizer of potassium sulfate style and organic-mineral compound fertilizers by spouting of stock, prilling and drying. The method can make the material fully mix and get an even slurry liquid with an excellent flowability which fits for the spouting of stock and prilling. Therefore, it may produce standard compound fertilizer containing organic matters and organic-mineral compound fertilizers in potassium sulfate style with a low, medium, high concentration.
Description
Technical field
The present invention relates to a kind of method of producing agricultural fertilizer, a kind ofly more precisely utilize the production of monosodium glutamate tail washings to contain the organic potassium sulfate compound fertilizer material and the method for potassium sulfate type organic-inorganic complex fertilizer.
Background technology
China is glutamate production big country, annual production occupies first of the world, monosodium glutamate per ton in process of production, 15 tons of organic tail washings of high density of capital discharging, contain 8% solid substance in the monosodium glutamate tail washings, the N that wherein contains, P, K, S and organic amino acid etc. all can be made full use of by agricultural, increase output, improve the soil, and can make the gourmet powder waste water pollution obtain administering.
General treatment process has two kinds now: a kind of is tail washings to be concentrated become concentrated solution, solid content is about 40%, the concentrated solution spray granulating is made nitrogen content at 16% fertilizer, this kind fertilizer does not meet national fertilizer standard, cause very big difficulty to market sale, because of this kind fertilizer pH value low (about 3), life-time service can bring disadvantageous effect to soil simultaneously; Also, cause the throughput of spray granulation drier to reduce because of concentrated solution water content height; Another kind of is tail washings to be concentrated become concentrated solution, solid content is about 40%, concentrated solution is spray dried to powdery, add solid phosphate fertilizer then, potash fertilizer carries out secondary drum granulating production particulate state composite fertilizer, because this method need be carried out secondary processing to fertilizer, waste energy, poor product quality is so this kind technology is seldom used.
Chinese patent CN00116087.7 disclosed " the multiple fertile method of organic waste water from gourmet powder production "; its technology is that to transfer pH value be 4.5 with adding liquefied ammonia in the organic waste water from gourmet powder; the vaporizer of packing into makes its concentrated 3-4 doubly; reach the concentrated solution of Baume 24.5-25.5 degree; concentrated solution nitrogenous 16%; sulphur 20%; reinstall agitated pool; add monoammonium phosphate or Repone K; or monoammonium phosphate and Repone K compound body; stir into homogenate; pump into the spray granulating machine; cooling afterwards; sieve into series compound fertilizer; monosodium glutamate concentrated solution after this kind technology greatest drawback is to neutralize can only dissolve a small amount of powder monoammonium phosphate; and Repone K is dissolved in the monosodium glutamate concentrated solution hardly, so this Technology is only limited to theory, can't use in actual production.In addition; present each monosodium glutamate producer all is that the monosodium glutamate tail washings after directly will concentrating carries out spray granulating; because concentrated solution only is concentrated to solid content about 40%; therefore contain the moisture content about 60% in the monosodium glutamate concentrated solution; directly carry out spray granulating; ton product fertilizer will consume a large amount of energy; make the throughput of spray granulating machine very low; and only contain 16% nitrogen in the product; be a kind of fertilizer that does not meet any country or industry, local agricultural fertilizer standard, so cause very big difficulty for the sale of fertilizer.
In sum, the present home and abroad monosodium glutamate tail washings also of no use preferred approach of producing standard compliant agricultural fertilizer.
Summary of the invention
At the problem that prior art exists, the object of the present invention is to provide a kind of method (meeting national standard " organic-inorganic complex fertilizer " GB18877-2002) of utilizing the production of monosodium glutamate tail washings to contain organic potassium sulfate compound fertilizer material (meeting national standard " composite fertilizer (compound manure) " GB15063-2001) and utilizing monosodium glutamate tail washings production potassium sulfate type organic-inorganic complex fertilizer.This method less investment, cost is low, flow process is short, constant product quality, can be used for producing containing the organic basic, normal, high concentration potassium sulfate compound fertilizer material and the organic-inorganic complex fertilizer of potassium sulfate type.
The object of the present invention is achieved like this:
A kind of method of utilizing monosodium glutamate waste liquid production to contain organic potassium sulfate compound fertilizer material, its main raw material has:
Solid content is the monosodium glutamate waste liquid of 8-50%
Concentration is the sulfuric acid of 90-98%
Purity is the Repone K of 95-98%
Total nutrient is the powdery monoammonium phosphate of 55-60%
Liquefied ammonia
Comprise following manufacture craft:
1) Repone K and strong sulfuric acid response are produced sal enixum, the conversion reaction temperature is at 110-150 ℃, and the conversion reaction time was at 2-3 hour;
2) powdery monoammonium phosphate is joined in proportion formation mixing ammonium liquid in the monosodium glutamate tail washings, its mixing temperature adds the powdery monoammonium phosphate of 1%-60% at 10-90 ℃ in the monosodium glutamate tail washings per ton;
3) above-mentioned mixing ammonium liquid is mixed the back with sal enixum and form nitration mixture, add the sal enixum of 1%-60% in the mixing ammonium liquid per ton;
4) liquefied ammonia is flashed to gas ammonia;
5) add gas ammonia in the nitration mixture that step (3) makes and carry out neutralization reaction generation slip, pressure is at 0.2-0.3MPa in the neutralization reaction process, and temperature is at 120-150 ℃;
6) slip is produced the potassium sulfate compound fertilizer material through the spray granulating drying.
Sulfuric acid and Repone K add in two each and every one the placed in-line reactive tanks by the metering back respectively in the described step (1), make Repone K finish replacement(metathesis)reaction, the sal enixum continuous overflow that generates is to the nitration mixture groove, the gas that two reactive tanks come out enters graphite heat exchanger simultaneously, introduce two placed in-line falling-film absorbers with blower fan then, the water counter-current operation absorbs, make hydrochloric acid, unabsorbed gases again after two placed in-line absorption towers wash with water by smoke stack emission, the absorption tower that tail gas washing liquid is sent into the front as absorption liquid absorbs the HCL by-product hydrochloric acid.
Nitration mixture and gas ammonia carry out neutralization reaction in the described step (5) in tubular reactor, enter neutralizing well then and further react the generation slip, slip sprays in the spray granulation drier after atomizing with pressurized air, send into vibratory screening apparatus by bucket elevator behind the material granulating, after screening, add in the scraper plate machine after entering the chain breaker fragmentation greater than the particle of 4mm, particle less than 1mm enters returning charge scraper plate machine, send in the spray granulation drier granulating again by returning charge scraper plate machine, qualified particle becomes finished product through metering packing below air cooling to 40 ℃ in conveyor is sent into cooler.The spray granulating head temperature is at 450-500 ℃, and spray granulating tail temperature is at 75-85 ℃.
The hotblast stove of described spray granulation drier adopts fired coal combustion, stack gas is sent in the spray granulation drier by calorifier, the tail gas that steam that tail gas behind the dry multiple fertilizer evaporates together with neutralization and cooling are discharged, enter Venturi scrubber again, wash with water, after tail gas washing tower is with the alkaline water washing, extract emptying out again by exhaust blower.
A kind of method of utilizing the monosodium glutamate tail washings to produce the potassium sulfate type organic-inorganic complex fertilizer,
Its main raw material has:
Solid content is the monosodium glutamate waste liquid of 30-40%
Concentration is the sulfuric acid of 90-98%
Purity is the Repone K of 95-98%
Total nutrient is the powdery monoammonium phosphate of 55-60%
The active sludge of organic content 〉=50%
Liquefied ammonia
Comprise following manufacture craft:
1) Repone K and strong sulfuric acid response are produced sal enixum, the conversion reaction temperature is at 110-150 ℃, and the conversion reaction time was at 2-3 hour;
2) powdery monoammonium phosphate and active sludge are joined in proportion in the monosodium glutamate tail washings to form and mixes ammonium liquid, its mixing temperature is at 10-90 ℃, the powdery monoammonium phosphate of adding 1%-7.5% in the monosodium glutamate tail washings per ton, the active sludge of 7%-10%;
3) above-mentioned mixing ammonium liquid is mixed the back with sal enixum and form nitration mixture, add the sal enixum of 1%-7.5% in the mixing ammonium liquid per ton;
4) liquefied ammonia is flashed to gas ammonia;
5) add gas ammonia in nitration mixture and carry out neutralization reaction generation slip, pressure is at 0.2-0.3MPa in the neutralization reaction process, and temperature is at 120-150 ℃;
6) slip is produced the potassium sulfate type organic-inorganic complex fertilizer through the spray granulating drying.
Sulfuric acid and Repone K add in two each and every one the placed in-line reactive tanks by the metering back respectively in the described step (1), make Repone K finish replacement(metathesis)reaction, the sal enixum continuous overflow that generates is to the nitration mixture groove, the gas that two reactive tanks come out enters graphite heat exchanger simultaneously, introduce two placed in-line falling-film absorbers with blower fan then, the water counter-current operation absorbs, make hydrochloric acid, unabsorbed gases again after two placed in-line absorption towers wash with water by smoke stack emission, the absorption tower that tail gas washing liquid is sent into the front as absorption liquid absorbs the HCL by-product hydrochloric acid.
Nitration mixture and gas ammonia carry out neutralization reaction in the described step (5) in tubular reactor; enter neutralizing well then and further react the generation slip; slip sprays in the spray granulation drier after atomizing with pressurized air; send into vibratory screening apparatus by bucket elevator behind the material granulating; after screening; add in the scraper plate machine after entering the chain breaker fragmentation greater than the particle of 4mm; particle less than 1mm enters returning charge scraper plate machine; send in the spray granulation drier granulating again by returning charge scraper plate machine; qualified particle is in conveyor is sent into cooler; below air cooling to 40 ℃, the spray granulating head temperature is at 450-500 ℃, and spray granulating tail temperature is at 75-85 ℃.
The hotblast stove of described spray granulation drier adopts fired coal combustion, stack gas is sent in the spray granulation drier by calorifier, the tail gas that steam that tail gas behind the dry multiple fertilizer evaporates together with neutralization and cooling are discharged, enter Venturi scrubber again, wash with water, after tail gas washing tower is with the alkaline water washing, extract emptying out again by exhaust blower.
Substantive distinguishing features that the present invention gives prominence to and significant technical progress just are, solved in the monosodium glutamate tail washings and can not directly add solid phosphate fertilizer, potash fertilizer is produced the defective of compound manure, because prove solid Repone K by experiment, solid sulphuric acid potassium is dissolved in present monosodium glutamate tail washings hardly, other agricultural phosphate fertilizer, potash fertilizer is same because can not mix fully, can not form the emulsion that mixes, make the granular compound fertilizer material so can't carry out spray granulating, and this technology is converted into sal enixum with Repone K, sal enixum and powdery monoammonium phosphate, the monosodium glutamate tail washings mixes back feeding gas ammonia and carries out neutralization reaction, reacts as follows:
1. conversion reaction KCl+H
2SO
4=KHSO
4+ HCL
2. neutralization reaction KHSO
4+ NH
3=K (NH
4) SO
4
NH
4H
2PO
4+NH
3＝(NH
4)
2HPO
4
H
2SO
4+2NH
3＝(NH
4)
2SO
4
Pressure is at 0.2-0.3MPa in the above-mentioned neutralization reaction process, and temperature is at 120-150 ℃, and material has carried out sufficient mixing, can generate uniform paste liquid, and has extraordinary flowability, is fit to spray granulating.
After this technology is transformed former spray granulating production equipment; the energy consumption of ton product fertilizer reduces greatly; the former technology of tablets press of Φ 4250 * 14500 models per hour can only be produced 4-5 ton fertilizer; and can reach the 10-15 ton by output after this technological transformation; because this technology has just increased solid substance in the monosodium glutamate tail washings---phosphate fertilizer and potash fertilizer; do not increase any moisture content; so total energy of granulation workshop section; coal; the consumption of water is with identical originally; just increased the potassium conversion system; so coal of last finished product fertilizer per ton;; the consumption of water equal energy source reduces 50-70%; meet very much country and require the energy-saving and cost-reducing development need of all trades and professions now; very outstanding of its environmental protection and energy saving effect; the utilization ratio that with fixed resource is former granulating system has simultaneously improved 2-3 doubly; can be according to the difference of producing the compound manure prescription; the monosodium glutamate tail washings is concentrated to solid content below 40%, between 8%-30%, gets final product, saved the energy consumption of monosodium glutamate tail washings concentration process so again.
In addition, contain organic potassium sulfate compound fertilizer material and the potassium sulfate type organic-inorganic complex fertilizer that utilizes this method to produce also has following characteristics:
1) because Repone K conversion reaction temperature is controlled at low temperature range between 110-150 ℃, so chloride ion content minimumly reaches 0.2% less than 0.8% in the product, far below the index that requires the fertile chloride ion content of sulfenyl less than 3% in the national standard;
2) can produce the potassium sulfate compound fertilizer material of the various prescriptions of basic, normal, high concentration according to surveying the requirement of soil prescription, potassium sulfate compound fertilizer material low, middle concentration belongs to the market vacancy, has extraordinary market outlook.The present invention is monosodium glutamate tail washings and the powdery monoammonium phosphate with the 8-50% solid content, sal enixum mixes the back and carries out neutralization reaction with gas ammonia, reacted slip is made the finished product compound manure through spray granulating, the material of finished product fertilizer consists of ammonium-potassium sulfate, and (nitrogen content is 10%, potassium content is 30%, total nutrient 40%), (nitrogen content is 11% to monoammonium phosphate, phosphorus content is 44-49%, total nutrient is 55-60%) and monosodium glutamate tail washings solid (nitrogen content is 16%), so as long as monosodium glutamate tail washings and powdery monoammonium phosphate, sal enixum mixes in different ratios, just can be adjusted to the ratio of three kinds of materials in the product composite fertilizer, produce total nutrient 〉=25% of all size, 〉=30%, 〉=40% low, in, the high-concentration compound fertilizer material;
3) product P H value is moderate, and the compound manure pH value of this kind explained hereafter is 5-6, be fit to various soil, and the pH value of former explained hereafter is 3.5, is not suitable for long-term application;
4) owing to reduced drying temperature, the spray granulating head temperature is being reduced to 450-500 ℃ by more than 600 degree, and spray granulating tail temperature drops to 75-85 ℃ by 95-110 ℃, thereby has reduced the charing of organic matter in the monosodium glutamate waste liquid, helps improving fertilizer efficiency;
5) add the organic content that active sludge can improve finished product fertilizer, make it to meet national standard " organic-inorganic complex fertilizer " GB18877-2002, the organic matter that contains 5-15% in the product, the needed methionine(Met) of amino acid crop of 5-10%, tens seed amino acids such as Methionin, to regulating soil, improve crop quality extraordinary effect is arranged, belong to nuisanceless green fertilizer, be applicable to various farm crop and cash crop, because of it belongs to sulfenyl fertilizer, so be specially adapted to tobacco, fruit tree, cash crop such as vegetables, can significantly improve the quality of crop, and play the effect of improving the soil, extraordinary market outlook are arranged.
Description of drawings
Fig. 1 is the process flow sheet of the present invention first to fourth embodiment, and adding in its monosodium glutamate waste liquid has powdery monoammonium phosphate, is used to produce the potassium sulfate compound fertilizer material that contains organic matter;
Fig. 2 is the process flow sheet of the present invention the 5th to the 7th embodiment, and adding in its monosodium glutamate waste liquid has powdery monoammonium phosphate and active sludge, is used to produce the potassium sulfate type organic-inorganic complex fertilizer.
Specific embodiment
Embodiment 1
The technical process of this embodiment as shown in Figure 1, its main raw material has:
Solid content is 8% monosodium glutamate waste liquid
Concentration is 90% sulfuric acid
Purity is 95% Repone K
Total nutrient is 55% powdery monoammonium phosphate
Liquefied ammonia
Its technological process of production is as follows:
1) sulfuric acid and Repone K are added in two placed in-line reactive tanks by the metering back respectively, 130 ℃ of conversion reaction temperature, 2.5 hours conversion reaction time, make Repone K finish replacement(metathesis)reaction, the sal enixum continuous overflow that generates is to the nitration mixture groove, the gas that two reactive tanks come out enters graphite heat exchanger simultaneously, introduce two placed in-line falling-film absorbers with blower fan then, the water counter-current operation absorbs, make 31% hydrochloric acid, unabsorbed gases washes with water through two placed in-line absorption towers again, reaches after the national specified discharge standard by smoke stack emission, and the absorption tower that tail gas washing liquid is sent into the front as absorption liquid absorbs the HCL by-product hydrochloric acid;
2) powdery monoammonium phosphate is joined in proportion formation mixing ammonium liquid in the monosodium glutamate waste liquid, its mixing temperature is 90 ℃, adds 60% powdery monoammonium phosphate in the monosodium glutamate tail washings per ton;
3) sal enixum that step (1) is made mixes back formation nitration mixture with the ammonium liquid that mixes that step (2) makes, and adds 28% sal enixum in the mixing ammonium liquid per ton;
4) liquefied ammonia is flashed to gas ammonia;
5) nitration mixture and gas ammonia are carried out neutralization reaction in tubular reactor, pressure is at 0.25MPa in the neutralization reaction process, and temperature enters neutralizing well then and further reacts the generation slip at 135 ℃;
6) slip is sprayed in the spray granulation drier with after the pressurized air atomizing; the hotblast stove of spray granulation drier adopts fired coal combustion; stack gas is sent in the spray granulation drier by calorifier; the spray granulating head temperature is at 450 ℃; spray granulating tail temperature is at 75 ℃; send into vibratory screening apparatus by bucket elevator behind the material granulating; after screening; add in the returning charge worm conveyor after entering the chain breaker fragmentation greater than the particle of 4mm; particle less than 1mm enters returning charge scraper plate machine; send in the spray granulation drier granulating again by returning charge scraper plate machine; qualified particle below air cooling to 40 ℃, is sent into finished belt in conveyor is sent into cooler; deliver to the finished product packing warehouse, through metering; packing back buttress sign indicating number is stacked for export trade.
The tail gas that steam that tail gas behind the multiple fertilizer of above-mentioned drying evaporates together with neutralization and cooling are discharged enters Venturi scrubber again, washes with water, after tail gas washing tower is with the alkaline water washing, extracts emptying out by exhaust blower again.
Embodiment 2
The technical process of this embodiment as shown in Figure 1, its main raw material has:
Solid content is 30% monosodium glutamate waste liquid
Concentration is 93% sulfuric acid
Purity is 96% Repone K
Total nutrient is 55% powdery monoammonium phosphate
Liquefied ammonia
Its technological process of production is:
1) Repone K and strong sulfuric acid response are produced sal enixum, the conversion reaction temperature is at 150 ℃, and the conversion reaction time was at 3 hours;
2) powdery monoammonium phosphate is joined in proportion formation mixing ammonium liquid in the monosodium glutamate tail washings, its mixing temperature adds 1% powdery monoammonium phosphate at 10 ℃ in the monosodium glutamate tail washings per ton;
3) above-mentioned mixing ammonium liquid is mixed the back with sal enixum and form nitration mixture, add 60% sal enixum in the mixing ammonium liquid per ton;
4) liquefied ammonia is flashed to gas ammonia;
5) add gas ammonia in nitration mixture and carry out neutralization reaction and generate slip, pressure is at 0.3MPa in the neutralization reaction process, and temperature is at 150 ℃;
6) slip is produced the potassium sulfate compound fertilizer material through the spray granulating drying;
All the other parameters and equipment used are identical with first embodiment, just repeat no more here.
Embodiment 3
The technical process of this embodiment as shown in Figure 1, its main raw material has:
Solid content is 40% monosodium glutamate waste liquid
Concentration is 96% sulfuric acid
Purity is 97% Repone K
The powdery monoammonium phosphate of total nutrient 58%
Liquefied ammonia
Its technological process of production is:
1) Repone K and strong sulfuric acid response are produced sal enixum, the conversion reaction temperature is at 130 ℃, and the conversion reaction time was at 2.5 hours;
2) powdery monoammonium phosphate is joined in proportion formation mixing ammonium liquid in the monosodium glutamate tail washings, its mixing temperature adds 30% powdery monoammonium phosphate at 30 ℃ in the monosodium glutamate tail washings per ton;
3) above-mentioned mixing ammonium liquid is mixed the back with sal enixum and form nitration mixture, add 27% sal enixum in the mixing ammonium liquid per ton;
4) liquefied ammonia is flashed to gas ammonia;
5) add gas ammonia in nitration mixture and carry out neutralization reaction generation slip, pressure is at 0.25MPa in the neutralization reaction process, and temperature is at 135 ℃;
6) slip is produced the potassium sulfate compound fertilizer material through the spray granulating drying;
All the other parameters and equipment used are identical with first embodiment, just repeat no more here.
Embodiment 4
The technical process of this embodiment as shown in Figure 1, its main raw material has:
Solid content is 50% monosodium glutamate waste liquid
Concentration is 98% sulfuric acid
Purity is 98% Repone K
The powdery monoammonium phosphate of total nutrient 60%
Liquefied ammonia
Its technological process of production is:
1) Repone K and strong sulfuric acid response are produced sal enixum, the conversion reaction temperature is at 110 ℃, and the conversion reaction time was at 2 hours;
2) powdery monoammonium phosphate is joined in proportion formation mixing ammonium liquid in the monosodium glutamate tail washings, its mixing temperature adds 23% powdery monoammonium phosphate at 20 ℃ in the monosodium glutamate tail washings per ton;
3) above-mentioned mixing ammonium liquid is mixed the back with sal enixum and form nitration mixture, add 1% sal enixum in the mixing ammonium liquid per ton;
4) liquefied ammonia is flashed to gas ammonia;
5) add gas ammonia in nitration mixture and carry out neutralization reaction generation slip, pressure is at 0.2MPa in the neutralization reaction process, and temperature is at 120 ℃;
6) slip is produced the potassium sulfate compound fertilizer material through the spray granulating drying;
All the other parameters and equipment used are identical with first embodiment, just repeat no more here.
Embodiment 5
The technical process of this embodiment as shown in Figure 2, its main raw material has:
Solid content is 30% monosodium glutamate waste liquid
Concentration is 90% sulfuric acid
Purity is 95% Repone K
Total nutrient is 55% powdery monoammonium phosphate
Organic content is 60% active sludge
Liquefied ammonia
Its technological process of production is:
1) Repone K and strong sulfuric acid response are produced sal enixum, the conversion reaction temperature is at 110 ℃, and the conversion reaction time was at 2 hours;
2) powdery monoammonium phosphate, active sludge are joined in proportion formation mixing ammonium liquid in the monosodium glutamate tail washings, its mixing temperature adds 7.5% powdery monoammonium phosphate, 10% active sludge at 90 ℃ in the monosodium glutamate tail washings per ton;
3) above-mentioned mixing ammonium liquid is mixed the back with sal enixum and form nitration mixture, add 1% sal enixum in the mixing ammonium liquid per ton;
4) liquefied ammonia is flashed to gas ammonia.
5) add gas ammonia in nitration mixture and carry out neutralization reaction generation slip, pressure is at 0.2MPa in the neutralization reaction process, and temperature is at 120 ℃;
6) slip is produced the potassium sulfate type organic-inorganic complex fertilizer through the spray granulating drying;
All the other parameters and equipment used are identical with first embodiment, just repeat no more here.
Embodiment 6
The technical process of this embodiment as shown in Figure 1, its main raw material has:
Solid content is 35% monosodium glutamate waste liquid
Concentration is 95% sulfuric acid
Purity is 97% Repone K
Total nutrient is 60% powdery monoammonium phosphate
Organic content is 50% active sludge
Liquefied ammonia
Its technological process of production is:
1) Repone K and strong sulfuric acid response are produced sal enixum, the conversion reaction temperature is at 150 ℃, and the conversion reaction time was at 3 hours;
2) powdery monoammonium phosphate is joined in proportion formation mixing ammonium liquid in the monosodium glutamate tail washings, its mixing temperature adds 1% powdery monoammonium phosphate, 8.5% active sludge at 10 ℃ in the monosodium glutamate tail washings per ton;
3) above-mentioned mixing ammonium liquid is mixed the back with sal enixum and form nitration mixture, add 7.5% sal enixum in the mixing ammonium liquid per ton;
4) liquefied ammonia is flashed to gas ammonia.
5) add gas ammonia in nitration mixture and carry out neutralization reaction generation slip, pressure is at 0.3MPa in the neutralization reaction process, and temperature is at 150 ℃;
6) slip is produced the potassium sulfate type organic-inorganic complex fertilizer through the spray granulating drying;
All the other parameters and equipment used are identical with first embodiment, just repeat no more here.
Embodiment 7
The technical process of this embodiment as shown in Figure 1, its main raw material has:
Solid content is 40% monosodium glutamate waste liquid
Concentration is 98% sulfuric acid
Purity is 98% Repone K
Total nutrient is 58% powdery monoammonium phosphate
Organic content is 70% active sludge
Liquefied ammonia
Its technological process of production is:
1) Repone K and strong sulfuric acid response are produced sal enixum, the conversion reaction temperature is at 130 ℃, and the conversion reaction time was at 2.5 hours;
2) powdery monoammonium phosphate is joined in proportion formation mixing ammonium liquid in the monosodium glutamate tail washings, its mixing temperature adds 5% powdery monoammonium phosphate, 7% active sludge at 45 ℃ in the monosodium glutamate tail washings per ton;
3) above-mentioned mixing ammonium liquid is mixed the back with sal enixum and form nitration mixture, add 5% sal enixum in the mixing ammonium liquid per ton;
4) liquefied ammonia is flashed to gas ammonia.
5) add gas ammonia in nitration mixture and carry out neutralization reaction generation slip, pressure is at 0.2MPa in the neutralization reaction process, and temperature is at 135 ℃;
6) slip is produced the potassium sulfate type organic-inorganic complex fertilizer through the spray granulating drying;
All the other parameters and equipment used are identical with first embodiment, just repeat no more here.
The various embodiments described above products obtained therefrom is its testing data such as following table after tested:
The present invention is not limited to above-mentioned specific embodiment; anyone can draw other various forms of variations under enlightenment of the present invention; no matter substitute or improve but what kind of is done, every identical with the application or akin technical scheme all drops within protection scope of the present invention.
Claims (8)
1, a kind of method of utilizing the production of monosodium glutamate tail washings to contain organic potassium sulfate compound fertilizer material, its main raw material has:
Solid content is the monosodium glutamate tail washings of 8-50%
Concentration is the sulfuric acid of 90-98%
Purity is the Repone K of 95-98%
Total nutrient is the powdery monoammonium phosphate of 55-60%
Liquefied ammonia
Comprise following manufacture craft:
1) Repone K and strong sulfuric acid response are produced sal enixum, the conversion reaction temperature is at 110-150 ℃, and the conversion reaction time was at 2-3 hour;
2) powdery monoammonium phosphate is joined in proportion formation mixing ammonium liquid in the monosodium glutamate tail washings, its mixing temperature adds the powdery monoammonium phosphate of 1%-60% at 10-90 ℃ in the monosodium glutamate tail washings per ton;
3) above-mentioned mixing ammonium liquid is mixed the back with sal enixum and form nitration mixture, add the sal enixum of 1%-60% in the mixing ammonium liquid per ton;
4) liquefied ammonia is flashed to gas ammonia;
5) add gas ammonia in the nitration mixture that step (3) makes and carry out neutralization reaction generation slip, pressure is at 0.2-0.3MPa in the neutralization reaction process, and temperature is at 120-150 ℃;
6) slip is produced through the spray granulating drying and is contained organic potassium sulfate compound fertilizer material.
2, the method of utilizing monosodium glutamate waste liquid production to contain organic potassium sulfate compound fertilizer material according to claim 1, it is characterized in that, sulfuric acid and Repone K add in two placed in-line reactive tanks by the metering back respectively in the described step (1), make Repone K finish replacement(metathesis)reaction, the sal enixum continuous overflow that generates is to the nitration mixture groove, the gas that two reactive tanks come out enters graphite heat exchanger simultaneously, introduce two placed in-line falling-film absorbers with blower fan then, the water counter-current operation absorbs, make hydrochloric acid, unabsorbed gases again after two placed in-line absorption towers wash with water by smoke stack emission, the absorption tower that tail gas washing liquid is sent into the front as absorption liquid absorbs the HCL by-product hydrochloric acid.
3; the method of utilizing monosodium glutamate waste liquid production to contain organic potassium sulfate compound fertilizer material according to claim 1; it is characterized in that; nitration mixture and gas ammonia carry out neutralization reaction in the described step (5) in tubular reactor; enter neutralizing well then and further react the generation slip; slip sprays in the spray granulation drier after atomizing with pressurized air; send into vibratory screening apparatus by bucket elevator behind the material granulating; after screening; add in the scraper plate machine after entering the chain breaker fragmentation greater than the particle of 4mm; particle less than 1mm enters returning charge scraper plate machine; send in the spray granulation drier granulating again by returning charge scraper plate machine; qualified particle is in conveyor is sent into cooler; become finished product composite fertilizer through metering packing below air cooling to 40 ℃, the spray granulating head temperature is at 450-500 ℃, and spray granulating tail temperature is at 75-85 ℃.
4, the method for utilizing monosodium glutamate waste liquid production to contain organic potassium sulfate compound fertilizer material according to claim 3, it is characterized in that, the hotblast stove of described spray granulation drier adopts fired coal combustion, stack gas is sent in the spray granulation drier by calorifier, the tail gas that steam that tail gas behind the dry multiple fertilizer evaporates together with neutralization and cooling are discharged enters Venturi scrubber again, washes with water, after tail gas washing tower is with the alkaline water washing, extract emptying out again by exhaust blower.
5, a kind of method of utilizing the monosodium glutamate tail washings to produce the potassium sulfate type organic-inorganic complex fertilizer, its main raw material has:
Solid content is the monosodium glutamate waste liquid of 30-40%
Concentration is the sulfuric acid of 90-98%
Purity is the Repone K of 95-98%
Total nutrient is the powdery monoammonium phosphate of 55-60%
The active sludge of organic content 〉=50%
Liquefied ammonia
Comprise following manufacture craft:
1) Repone K and strong sulfuric acid response are produced sal enixum, the conversion reaction temperature is at 110-150 ℃, and the conversion reaction time was at 2-3 hour;
2) powdery monoammonium phosphate and active sludge are joined in proportion in the monosodium glutamate tail washings to form and mixes ammonium liquid, its mixing temperature is at 10-90 ℃, the powdery monoammonium phosphate of adding 1%-7.5% in the monosodium glutamate tail washings per ton, the active sludge of 7%-10%;
3) above-mentioned mixing ammonium liquid is mixed the back with sal enixum and form nitration mixture, add the sal enixum of 1%-7.5% in the mixing ammonium liquid per ton;
4) liquefied ammonia is flashed to gas ammonia;
5) add gas ammonia in nitration mixture and carry out neutralization reaction generation slip, pressure is at 0.2-0.3MPa in the neutralization reaction process, and temperature is at 120-150 ℃;
6) slip is produced the potassium sulfate type organic-inorganic complex fertilizer through the spray granulating drying.
6, the method of utilizing the monosodium glutamate tail washings to produce the potassium sulfate type organic-inorganic complex fertilizer according to claim 5, it is characterized in that, sulfuric acid and Repone K add in two each and every one the placed in-line reactive tanks by the metering back respectively in the described step (1), make Repone K finish replacement(metathesis)reaction, the sal enixum continuous overflow that generates is to the nitration mixture groove, the gas that two reactive tanks come out enters graphite heat exchanger simultaneously, introduce two placed in-line falling-film absorbers with blower fan then, the water counter-current operation absorbs, make hydrochloric acid, unabsorbed gases again after two placed in-line absorption towers wash with water by smoke stack emission, the absorption tower that tail gas washing liquid is sent into the front as absorption liquid absorbs the HCL by-product hydrochloric acid.
7; the method of utilizing the monosodium glutamate tail washings to produce the potassium sulfate type organic-inorganic complex fertilizer according to claim 5; it is characterized in that; nitration mixture and gas ammonia carry out neutralization reaction in the described step (5) in tubular reactor; enter neutralizing well then and further react the generation slip; slip sprays in the spray granulation drier after atomizing with pressurized air; send into vibratory screening apparatus by bucket elevator behind the material granulating; after screening; add in the scraper plate machine after entering the chain breaker fragmentation greater than the particle of 4mm; particle less than 1mm enters returning charge scraper plate machine; send in the spray granulation drier granulating again by returning charge scraper plate machine; qualified particle is in conveyor is sent into cooler; become finished product through metering packing below air cooling to 40 ℃, the spray granulating head temperature is at 450-500 ℃, and spray granulating tail temperature is at 75-85 ℃.
8, the method for utilizing the monosodium glutamate tail washings to produce the potassium sulfate type organic-inorganic complex fertilizer according to claim 7, it is characterized in that, the hotblast stove of described spray granulation drier adopts fired coal combustion, stack gas is sent in the spray granulation drier by calorifier, the tail gas that steam that tail gas behind the dry multiple fertilizer evaporates together with neutralization and cooling are discharged enters Venturi scrubber again, washes with water, after tail gas washing tower is with the alkaline water washing, extract emptying out again by exhaust blower.
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| CN101898909A (en) * | 2009-05-31 | 2010-12-01 | 倪丹仙 | Method for producing circular granular potassium and organic-inorganic compound fertilizer through organic waste liquor |
| CN103044117A (en) * | 2012-12-23 | 2013-04-17 | 菱花集团有限公司 | Organic fertilizer based on solid waste comprehensive utilization of monosodium glutamate industry |
| CN103030440A (en) * | 2012-12-23 | 2013-04-10 | 菱花集团有限公司 | Organic fertilizer based on monosodium glutamate desalination solution and preparation method |
| CN103044098A (en) * | 2012-12-23 | 2013-04-17 | 菱花集团有限公司 | Organic fertilizer based on desalting solution, sludge and humic acid and preparation method of same |
| CN104163677A (en) * | 2014-08-08 | 2014-11-26 | 西安济邦新农化实业有限公司 | Carbon-base polymorphic-nitrogen ecological fertilizer and production method thereof |
| CN104446795B (en) * | 2014-12-02 | 2017-03-15 | 江苏省地矿复合肥厂 | A kind of adjustable potassium sulfate compound fertilizer ammonification production technology of reaction heat |
| CN105418267A (en) * | 2015-12-25 | 2016-03-23 | 福建省南平市建阳区好与佳生物制肥有限公司 | Preparation method of slow-release granular fertilizer |
| CN107619305A (en) * | 2017-03-29 | 2018-01-23 | 济南航晨生物科技有限公司 | A kind of method that monosodium glutamate waste liquid prepares potassium sulfate powdery fertilizer |
| CN111087262A (en) * | 2018-10-24 | 2020-05-01 | 河南聚丰肥业有限公司 | Fertilizer deacidification agent |
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| 味精废水治理的现状及进展. 陶涛，詹德昊，芦秀青，金儒霖.环境污染治理技术与设备，第3卷第1期. 2002 |
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