CN104557291A - Production technology of slurry type compound fertilizer - Google Patents
Production technology of slurry type compound fertilizer Download PDFInfo
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- CN104557291A CN104557291A CN201410827095.4A CN201410827095A CN104557291A CN 104557291 A CN104557291 A CN 104557291A CN 201410827095 A CN201410827095 A CN 201410827095A CN 104557291 A CN104557291 A CN 104557291A
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- Prior art keywords
- sludge
- fertilizer
- type composite
- source
- composite fertilizer
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/20—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for preventing the fertilisers being reduced to powder; Anti-dusting additives
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/02—Superphosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the field of compound fertilizer production, and discloses a production technology of a slurry type compound fertilizer. In the preparation process, an anti-blocking agent in added to effectively solve the crystallization and hardening problems of the slurry type compound fertilizer; the preparation of the compound fertilizer is not limited by the types of the nitrogen fertilizers, but can be precisely matched according to the plant nutritional requirement; the prepared slurry type compound fertilizer can be preserved for at least four months above at normal temperature, is not required to be stirred regularly, and further cannot generate the crystallization or hardening phenomenon; when being applied as a leaf fertilizer, the anti-blocking agent can be dissolved in water, so that the slurry type compound fertilizer cannot block a sprayer; after application of the fertilizer, the anti-blocking agent can be quickly decomposed, so as not to generate environment pollution; in the slurry grinding process, the ingredients are simply added, so that the production technology is simple, convenient and feasible in processing process, capable of saving labor and effort, and low in cost.
Description
Technical field
The present invention relates to field of compound fertilizer production, refer to a kind of production technique of sludge-type composite fertilizer especially.
Background technology
Liquid composite fertilizer is also known as fluid composite fertilizer, comprise clear liquid type (solution-type), suspension type (suspension) and sludge-type (slurry type), wherein clear liquid type fertilizer all dissolves, not containing solid particulate, limpid transparent, composite fertilizer's nutrient density is lower, nutrient total content (N+P
2o
5+ K
2o) general not higher than 35%; Suspension type fertilizer is the fluid compound fertilizer being added with suspension agent, and suspension agent is under agitation can the clay mineral of pulping, if wilkinite, carclazyte, attapulgite, kaolin, sepiolite etc. are sorbent material, and the use atlapulgite that the U.S. is more, consumption is about 1-2%; Sludge-type fertilizer is than suspension type fertilizer more thickness, and in muddy, composite fertilizer's nutrient total content can reach 50-60%, almost suitable with the solid fertilizer content of high density.Existing sludge-type composite fertilizer, take clay mineral as carrier, consumption about 5%, is equipped with special facilities periodic agitation in use procedure, and the process of depositing can produce crystallization and harden, and impact uses, and the use seriously constraining high density liquid fertilizer is promoted.In the U.S., sludge-type composite fertilizer, only has the area comparatively improving the defeated fertile system of pipeline to develop to some extent in minority.Urea is the fertilizer that nitrogen content is the highest, but considers the characteristic being easy to moisture absorption and crystallization of urea, and during preparation sludge-type composite fertilizer, raw material often selects fertilizer beyond urea as nitrogenous source, and this can strongly limit the raising of nitrogen element content in composite fertilizer.
Compare traditional solid composite fertilizer, liquid compound fertilizer material has the following advantages: 1. production cost is low, and technical process simplifies, and equipment is simple, less investment; 2. producing, use, transport in there will not be dust, smog, pollute few; 3. there is not sucting wet problem in product; 4. can with sterilant, sterilant, herbicide mixture, and to mix; 5. foliage-spray, Sui Shuichong can execute, also can spray, drip irrigation or pouring, easy to use, cost saving, produces effects fast.In the U.S., liquid fertilizer accounts for about 30% of whole chemical fertilizer total amount.In states such as Britain, Germany, Belgium, Holland, Mexico, Russia also at the various liquid fertilizer of extensive application.The development trend of current chemical fertilizer is in the world high density, fluidization, some agriculture developed countries are all improving constantly concentration of fertilizer in the world, as the concentration of fertilizer average out to 42.9% of the U.S., state's average out to 40% such as Japan, France, Germany, Britain, Russia is 37%.And the mean concns of the current fertilizer of China is only about 20%.According to pertinent data introduction, concentration of fertilizer often improves 10%, just can reduce more than 20% of the expenses such as fertilizer packaging, storage, transport and management.Productive expense is low, nutrient content is high owing to having for liquid fertilizer, be easy to compound, can directly be absorbed by farm crop, be convenient to the plurality of advantages such as rational application of fertilizers (balance fertilizing) and mechanized application, is more and more subject to the common concern of various countries.In the world the intensive agriculture of developed country and industrialization level high, for mechanization of agriculture farming and mechanized application create good condition, therefore liquid fertilizer is widely applied in these countries.International fertilizer consumption is to the future development of high density, Composite, fluidization.
Summary of the invention
The present invention proposes a kind of production technique of sludge-type composite fertilizer, urea can be selected as nitrogenous source, and fertilizer can keep proterties for a long time, is convenient to storage.
Technical scheme of the present invention is achieved in that
A production technique for sludge-type composite fertilizer, is characterized in that, comprises the following steps:
(1) NR needed for plant, the ratio of allotment nitrogenous source, phosphorus source, potassium source and each raw material of trace element, in raw material total mass, add anti-hard caking agent and the 10-40% water of 1-3%, stirring and evenly mixing, obtains mixture;
(2) mixture of step (1) gained is added paste roller mill, carry out defibrination, obtain sludge-type composite fertilizer;
(3) the sludge-type compound solution that step (2) processes is distributed into storehouse.
Further, described nitrogenous source is the mixture of one or more in urea, ammonium nitrate, ammonium chloride, liquefied ammonia.
Further, described anti-hard caking agent is starch.
Further, described starch is pasted starch.
Further, described step (2) paste roller mill rotating speed 700-900r/min, defibrination is less than 0.15mm to particle diameter.
Further, the mass ratio of described nitrogenous source, phosphorus source, potassium source and each raw material of trace element is, nitrogenous source: phosphorus source: potassium source: trace element=10-40:10-30:20-50:5-15.
Beneficial effect of the present invention:
The multiplex clay of existing sludge-type composite fertilizer is carrier.With the fertilizer of this carrier, can not deposit, need periodic agitation.And the present invention with the addition of starch as anti-hard caking agent, N, C, H, O etc. of containing in the molecule of the compound of starch molecule and composition fertilizer can be interacted by the reactive force such as Van der Waals force, hydrogen bond, form metastable structure, the suspended state of obtained sludge-type composite fertilizer can be stablized, avoid the generation of crystallization, the sludge-type composite fertilizer of making, preserves more than 3 months at normal temperatures, can not produce crystallization, caking phenomenon.Deposit in process and can keep flow-like for a long time, do not need periodic agitation, use easy to operate.When using as foliage fertilizer, the starch water soluble used, can not produce the phenomenon of blocking atomizer; After Fertilizer application, starch can be decomposed rapidly, can not produce environmental pollution; Directly add in defibrination process and prepare burden, the course of processing is simple and easy to do, saves labor, cheap, has good promotion prospect.
Urea has economy, broad spectrum is good, nitrogen content is high feature, is good nitrogenous source.But due to the easy moisture absorption crystallization of urea, prior art can not solve the recrystallization problem of sludge-type composite fertilizer, therefore, when making sludge-type composite fertilizer, usually select fertilizer beyond urea as nitrogenous source.And urea is the nitrogenous fertilizer that nitrogen element content is the highest, if replace to other nitrogenous fertilizer, identical nitrogen element content is reached, the consumption of nitrogenous fertilizer will inevitably be increased, increase production cost.The present invention well solves the problem of urea in the crystallization of sludge-type composite fertilizer, urea can be selected as nitrogenous source, expand the source of sludge-type composite fertilizer material, simplify production technique, reduce the cost of sludge-type composite heat transfer, have significant economic implications.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 sludge-type composite heat transfer of the present invention schema.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
A production technique for sludge-type composite fertilizer, comprises the following steps:
(1) nutrient ratio needed for plant, the ratio of allotment nitrogenous source, phosphorus source, potassium source and each raw material of trace element, to add the total mass of fertilizer, add starch and 10% water of 1%, stirring and evenly mixing, obtains mixture; The fertilizer added selects urea, potassium sulfate, potassium primary phosphate, magnesium sulfate and zinc sulfate, its concrete proportions is allocated according to different plant physiology features, and wherein the mass ratio of nitrogenous source, phosphorus source, potassium source and trace element is nitrogenous source: phosphorus source: potassium source: trace element=10:10:20:5;
(2) mixture of step (1) gained is added paste roller mill, carry out defibrination; Defibrination is less than 0.15mm to particle diameter, obtains sludge-type compound solution;
(3) sludge-type compound solution packing step (2) processed, warehouse-in.
Embodiment 2
A production technique for sludge-type composite fertilizer, comprises the following steps:
(1) nutrient ratio needed for plant, the ratio of allotment nitrogenous source, phosphorus source, potassium source and each fertilizer of trace element, to add the total mass of fertilizer, add pasted starch and 25% water of 2%, stirring and evenly mixing, obtains mixture; The fertilizer added selects ammonium nitrate, ammonium chloride, potassium primary phosphate, sulphate of potash and magesium, concrete ratio adjusts needed for plant-growth, wherein the mass ratio of nitrogenous source, phosphorus source, potassium source and trace element is, nitrogenous source: phosphorus source: potassium source: trace element=25:20:35:10;
(2) mixture of step (1) gained is added paste roller mill, carry out defibrination; Defibrination to particle diameter is less than 0.15mm and obtains sludge-type composite fertilizer;
(3) sludge-type composite fertilizer bottling step (2) processed, proceeds to storehouse and preserves.
Embodiment 3
A production technique for sludge-type composite fertilizer, comprises the following steps:
(1) nutrient ratio needed for plant, the ratio of allotment nitrogenous source, phosphorus source, potassium source and each raw material of trace element, to add fertilizer total mass, adds the pasted starch of 3% and the water of 40%, stirring and evenly mixing; Add fertilizer and select urea, liquefied ammonia, Secondary ammonium phosphate, Repone K and zinc sulfate; Concrete proportions adjusts needed for plant-growth, and wherein the mass ratio of nitrogenous source, phosphorus source, potassium source and trace element is, nitrogenous source: phosphorus source: potassium source: trace element=40:30:50:15;
(2) mixture of step (1) gained is added paste roller mill, carry out defibrination; Defibrination 8min, obtains sludge-type compound solution;
(3) sludge-type compound solution bottling step (2) processed, proceeds to storehouse and preserves.
Embodiment 4
A production technique for sludge-type composite fertilizer, comprises the following steps:
(1) nutrient ratio needed for plant, the ratio of allotment nitrogenous source, phosphorus source, potassium source and each raw material of trace element, adds the starch of raw material total mass 2.5%, stirring and evenly mixing; Add fertilizer and select urea, liquefied ammonia, double superhosphate and saltpetre; Concrete proportions adjusts needed for plant-growth, and the mass ratio of its nitrogenous source, phosphorus source, potassium source and each raw material of trace element is, nitrogenous source: phosphorus source: potassium source: trace element=25:10:50:10;
(2) mixture of step (1) gained is added paste roller mill, carry out defibrination; Defibrination 8min, obtains sludge-type compound solution;
(3) sludge-type compound solution bottling step (2) processed, proceeds to storehouse and preserves.
Its production scheme of above embodiment as shown in Figure 1.
Sludge-type composite fertilizer of the present invention study on the stability
For investigating the stability adopting sludge-type compound fertilizer production technology of the present invention to produce the sludge-type composite fertilizer of gained, allocate 4 parts of fertilizer material production sludge-type composite fertilizers respectively, the concrete production decision of its experimental group is as follows:
Scheme 1: the technological process of production is identical with embodiment 1.
Scheme 2: the technological process of production is identical with embodiment 2.
Scheme 3: the technological process of production is identical with embodiment 3.
Scheme 4: the technological process of production is identical with embodiment 4.
Scheme 5: fertilizer only selects urea, its technological process of production is with reference to embodiment 1.
In above scheme, fertilizer material total mass is 50kg.The quality such as anti-hard caking agent replaces to are crossed 100 object kaolin as a control group, the technological process of production is constant.Preserve at normal temperatures, the sludge-type composite fertilizer of record gained occurs the time of crystallization or caking phenomenon the results are shown in Table 1.
Table 1 the present invention produce sludge-type composite fertilizer stability compare
As shown in Table 1, the sludge-type composite fertilizer that the preparation method using the present invention's 4 embodiments to provide obtains, can preserve more than 120 days (4 months) at normal temperatures, and proterties keeps stable, there will not be the phenomenon such as crystallization or caking.Even if fertilizer used is single urea, proterties still at least can stablize maintenance more than 100 days, can meet in production the needs transporting, sell, use, and is conducive to the factorial praluction realizing sludge-type composite fertilizer.And anti-hard caking agent is replaced to the mistake 100 object kaolin of equivalent by control group, the time that proterties can stablize maintenance shortens greatly, and especially fertilizer is the control group of urea, cannot meet the needs of factorial praluction.
Adopt above experimental group and control group gained sludge-type composite fertilizer to carry out spraying experiment to find, control group gained sludge-type composite fertilizer is poorly soluble, and the situation spraying solution blocking atomizer in process frequently occurs, and has had a strong impact on working efficiency.And experimental group gained sludge-type composite fertilizer can all dissolve, solvability is good, easy to operate; Spray the situation that atomizer does not appear blocking in solution in process, substantially increase working efficiency, to the popularization of sludge-type compound, there is great promoter action.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a production technique for sludge-type composite fertilizer, is characterized in that, comprises the following steps:
(2) NR needed for plant, the ratio of allotment nitrogenous source, phosphorus source, potassium source and each fertilizer of trace element, in the fertilizer total mass added, add anti-hard caking agent and the 10-40% water of 1-3%, stirring and evenly mixing, obtains mixture;
(3) mixture of step (1) gained is added paste roller mill, carry out defibrination and obtain sludge-type composite fertilizer;
(4) sludge-type compound solution packing step (2) processed, proceeds to storehouse and preserves.
2. the production technique of a kind of sludge-type composite fertilizer according to claim 1, is characterized in that: described nitrogenous source is one or more mixture in urea, ammonium nitrate, ammonium chloride, liquefied ammonia.
3. the production technique of a kind of sludge-type composite fertilizer according to claim 1, is characterized in that: described anti-hard caking agent is starch.
4. the production technique of a kind of sludge-type composite fertilizer according to claim 3, is characterized in that: described starch is pasted starch.
5. the production technique of a kind of sludge-type composite fertilizer according to claim 1, is characterized in that: the particle diameter that described step (2) is ground to fertilizer is less than 0.15mm.
6. the production technique of a kind of sludge-type composite fertilizer according to claim 1 and 2, it is characterized in that, the mass ratio of described nitrogenous source, phosphorus source, potassium source and each raw material of trace element is, nitrogenous source: phosphorus source: potassium source: trace element=10-40:10-30:20-50:5-15.
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