CN110981575A - Fertilizer containing medium trace elements and preparation method thereof - Google Patents
Fertilizer containing medium trace elements and preparation method thereof Download PDFInfo
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- CN110981575A CN110981575A CN201911199112.3A CN201911199112A CN110981575A CN 110981575 A CN110981575 A CN 110981575A CN 201911199112 A CN201911199112 A CN 201911199112A CN 110981575 A CN110981575 A CN 110981575A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
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Abstract
The invention provides a fertilizer containing medium trace elements and a preparation method thereof. In the fertilizer and the preparation method, the intermediate sludge meeting the A-type sludge standard is selected as the matrix for preparing the fertilizer, so that the fertilizer efficiency of the fertilizer can be obviously improved. In addition, trace elements in zinc sulfate, silicon dioxide and borax are mixed in the medium sludge containing medium elements, so that the problem of application amount can be obviously solved, and the problem of environmental pollution caused by the conventional sludge treatment method can be solved. The fertilizer containing medium and trace elements provided by the invention can be used as a base fertilizer and an auxiliary fertilizer to supplement the medium and trace elements in soil.
Description
Technical Field
The invention relates to the technical field of fertilizers, in particular to a fertilizer containing medium and trace elements and a preparation method thereof.
Background
The fertilizer is a substance which provides one or more nutrient elements necessary for plants, improves the soil property and improves the soil fertility level, and is one of the material bases of agricultural production. The fertilizers mainly comprise ammonium phosphate fertilizers, macroelement water-soluble fertilizers, medium-element fertilizers, biological fertilizers, organic fertilizers, multi-dimensional field energy concentrated organic fertilizers and the like, at present, the fertilizers in China are mainly used by nitrogen, phosphorus and potassium macroelements, and the application of medium and trace elements in farmlands is omitted.
With the increasing of chemical fertilizers, the activity of soil is continuously reduced, the nutrient utilization rate is gradually insufficient, and the nitrogen-phosphorus-potassium macroelement fertilizer cannot ensure the nutrient components required by crops, so that the balance absorption of the nutrients of the crops is enhanced while the utilization of the fertilizer is improved by activating medium trace elements and organic matters.
Sludge is a product of sewage treatment, and is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids and the like. The sludge contains a large amount of organic matters and is easy to decay and stink. In addition, the sludge has fine particles and small specific gravity, and is a colloidal liquid thick substance between liquid and solid. In recent years, with the stricter agricultural standards of sludge (such as synthetic organic matter and heavy metal content), the agricultural proportion of sludge in germany, italy, danish and other countries is decreasing, and the proportion of sludge in landfills is increasing. The proportion of sludge for agricultural use is increasing in countries such as the united states, the united kingdom and japan, and the proportion of landfill is decreasing. At present, most of sludge in China is dried and then incinerated, which not only affects the air environment, but also wastes organic matters in the sludge, thereby causing resource waste.
Disclosure of Invention
The invention provides a fertilizer containing medium trace elements and a preparation method thereof, which aim to solve the problem of environmental pollution caused by the existing sludge treatment method.
Reclaimed water sludge is solid waste generated by water resource utilization and is a problem to be solved for environmental pollution. Based on the easy polluted environment of normal water sludge treatment mode and cause the wasting of resources, use normal water sludge to prepare fertilizer as the raw materials in this application, and then solve chemical industry enterprise normal water treatment technique singleness, and unable reutilization problem.
The invention provides a fertilizer containing medium trace elements, which is prepared from raw materials including reclaimed water sludge, zinc sulfate, silicon dioxide, borax and sulfuric acid. Wherein the reclaimed water sludge provides organic matters, calcium elements and magnesium elements for the fertilizer; the zinc sulfate provides zinc element for the fertilizer; the silicon dioxide provides silicon element for the fertilizer; borax provides boron element for the fertilizer; the sulfuric acid provides elemental sulfur and an activator for the fertilizer. Therefore, the fertilizer in the application contains medium elements such as calcium element, magnesium element and sulfur element, and also contains trace elements such as zinc element, silicon element and boron element. In the application, the mass ratio of reclaimed water sludge, zinc sulfate, silicon dioxide, borax and sulfuric acid is 1: (2-10): (2-10): (2-10): (6-30).
The reclaimed water sludge in the application is sludge treated by reclaimed water treatment equipment, and the analysis index of the reclaimed water sludge meets the A-type sludge standard in GB 4284-2018. More preferably, the water content of the reclaimed water sludge is 60-90%.
Based on the fertilizer containing medium trace elements provided by the invention, the invention also provides a preparation method of the fertilizer containing medium trace elements, which comprises the following steps:
s01: zinc sulfate, silicon dioxide and borax are respectively crushed and ground.
And respectively putting zinc sulfate, silicon dioxide and borax into a grinder for grinding until powder is formed. Powdered zinc sulfate, silicon dioxide and borax are beneficial to granulation of the fertilizer and appearance of finished products. Preferably, the particle sizes of the zinc sulfate, the silicon dioxide and the borax after grinding are respectively 10-100 μm.
S02: uniformly mixing the zinc sulfate, the silicon dioxide, the borax and the reclaimed water sludge after crushing and grinding to form a solid-liquid mixture.
Conveying the reclaimed water sludge with the water content of 60-90% to a mixer through a sludge conveyor. And pouring the zinc sulfate, the silicon dioxide and the borax which are crushed and ground into a mixer, and uniformly mixing the zinc sulfate, the silicon dioxide and the borax with the reclaimed water sludge through the mixer to form a solid-liquid mixture. Wherein the mass ratio of the reclaimed water sludge to the zinc sulfate, the silicon dioxide and the borax is 1: (2-10): (2-10): (2-10).
S03: and adding the solid-liquid mixture into sulfuric acid for activation to obtain an activator.
The solid-liquid mixture is poured into an activation tank containing sulfuric acid. The sulfuric acid can activate the solid-liquid mixture to obtain an activated substance. Wherein the mass ratio of the reclaimed water sludge to the sulfuric acid is 1: (6-30).
S04: and drying the activated substance at high temperature until the water content is 10-40%, and then extruding and granulating to obtain the fertilizer containing medium and trace elements.
And (4) feeding the activated substance into a dryer for drying treatment. Specifically, the activator is dried at a high temperature in a dryer at a temperature of 80-150 ℃ until the water content of the activator is 10-40%. The high-temperature drying not only can remove redundant water in the activator, but also can carry out secondary treatment on residual flora and flocculating agent in the activator so as to improve the fertilizer efficiency of the fertilizer. And extruding and granulating the dried activated substance by a granulator to obtain the fertilizer containing the medium and trace elements.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
the invention provides a fertilizer containing medium trace elements and a preparation method thereof. In the fertilizer and the preparation method, the intermediate sludge meeting the A-type sludge standard is selected as the matrix for preparing the fertilizer, so that the fertilizer efficiency of the fertilizer can be obviously improved. In addition, trace elements in zinc sulfate, silicon dioxide and borax are mixed in the medium sludge containing medium elements, so that the problem of application amount can be obviously solved, and the problem of environmental pollution caused by the conventional sludge treatment method can be solved. The fertilizer containing medium and trace elements provided by the invention can be used as a base fertilizer and an auxiliary fertilizer to supplement the medium and trace elements in soil.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a schematic flow chart of a method for preparing a fertilizer containing medium trace elements according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a fertilizer preparation system containing medium trace elements according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1 and 2, fig. 1 and 2 respectively show a flow diagram of a method for preparing a fertilizer containing medium trace elements and a structural diagram of a system for preparing a fertilizer containing medium trace elements. The following description of the embodiments is based on figures 1 and 2.
Example 1
The embodiment of the application provides a preparation method of a fertilizer containing medium and trace elements, which comprises the following steps:
s101: zinc sulfate, silicon dioxide and borax are respectively crushed and ground in a grinder until the particle size is 10 mu m.
S102: the zinc sulfate, the silicon dioxide, the borax and the reclaimed water sludge after being crushed and ground are mixed according to the mass ratio of 1: 2: 2: 2: 6, uniformly mixing in a mixer to form a solid-liquid mixture.
S103: and adding the solid-liquid mixture after uniform mixing into an activation tank containing sulfuric acid for activation treatment to obtain an activated substance.
S104: drying the activated substance in a dryer at the temperature of 80 ℃ at high temperature until the water content is 10%, and finally extruding and granulating to obtain the fertilizer containing the medium and trace elements.
Example 2
The embodiment of the application provides a preparation method of a fertilizer containing medium and trace elements, which comprises the following steps:
s201: zinc sulfate, silicon dioxide and borax are respectively crushed and ground in a grinder until the particle size is 100 mu m.
S202: the zinc sulfate, the silicon dioxide, the borax and the reclaimed water sludge after being crushed and ground are mixed according to the mass ratio of 1: 10: 10: 10: 30 are mixed evenly in a mixer to form a solid-liquid mixture.
S203: and adding the solid-liquid mixture after uniform mixing into an activation tank containing sulfuric acid for activation treatment to obtain an activated substance.
S204: drying the activated substance in a dryer at the temperature of 150 ℃ at high temperature until the water content is 40%, and finally extruding and granulating to obtain the fertilizer containing the medium and trace elements.
Example 3
The embodiment of the application provides a preparation method of a fertilizer containing medium and trace elements, which comprises the following steps:
s301: zinc sulfate, silicon dioxide and borax are respectively crushed and ground in a grinder until the particle size is 50 mu m.
S302: the zinc sulfate, the silicon dioxide, the borax and the reclaimed water sludge after being crushed and ground are mixed according to the mass ratio of 1: 5: 7: 8: 20 are mixed evenly in a mixer to form a solid-liquid mixture.
S303: and adding the solid-liquid mixture after uniform mixing into an activation tank containing sulfuric acid for activation treatment to obtain an activated substance.
S304: drying the activated substance in a drier at 100 deg.C to water content of 20%, and extruding and granulating to obtain fertilizer containing trace elements.
Example 4
The embodiment of the application provides a preparation method of a fertilizer containing medium and trace elements, which comprises the following steps:
s401: zinc sulfate, silicon dioxide and borax are respectively crushed and ground in a grinder until the particle size is 80 mu m.
S402: the zinc sulfate, the silicon dioxide, the borax and the reclaimed water sludge after being crushed and ground are mixed according to the mass ratio of 1: 6: 6: 6: 25 are mixed evenly in a mixer to form a solid-liquid mixture.
S403: and adding the solid-liquid mixture after uniform mixing into an activation tank containing sulfuric acid for activation treatment to obtain an activated substance.
S404: drying the activated substance in a dryer at 120 ℃ at high temperature until the water content is 30%, and finally extruding and granulating to obtain the fertilizer containing the medium and trace elements.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The invention is not limited to the precise arrangements described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. The fertilizer containing medium trace elements is characterized in that preparation raw materials of the fertilizer comprise reclaimed water sludge, zinc sulfate, silicon dioxide, borax and sulfuric acid, wherein the reclaimed water sludge meets the A-type sludge standard.
2. The medium trace element-containing fertilizer according to claim 1, wherein the mass ratio of the reclaimed water sludge, the zinc sulfate, the silica, the borax and the sulfuric acid is 1: (2-10): (2-10): (2-10): (6-30).
3. The fertilizer containing medium trace elements as claimed in claim 1, wherein the reclaimed water sludge is sludge treated by reclaimed water treatment equipment, and the analysis index of the reclaimed water sludge meets the standard of class A sludge in GB 4284-2018.
4. The medium trace element-containing fertilizer according to claim 1, wherein the water content of the reclaimed water sludge is 60 to 90%.
5. A preparation method of a fertilizer containing medium and trace elements is characterized by comprising the following steps:
respectively crushing and grinding zinc sulfate, silicon dioxide and borax;
uniformly mixing the zinc sulfate, the silicon dioxide, the borax and the reclaimed water sludge after crushing and grinding to form a solid-liquid mixture;
adding the solid-liquid mixture into sulfuric acid for activation to obtain an activator;
and drying the activated substance at high temperature until the water content is 10-40%, and then extruding and granulating to obtain the fertilizer containing medium and trace elements.
6. The preparation method of claim 5, wherein the particle sizes of the zinc sulfate, the silicon dioxide and the borax after grinding are respectively 10-100 μm.
7. The method according to claim 5, wherein the temperature for drying the activator at high temperature is 80-150 ℃.
8. The preparation method according to claim 5, wherein the mass ratio of the reclaimed water sludge, the zinc sulfate, the silicon dioxide, the borax and the sulfuric acid is 1: (2-10): (2-10): (2-10): (6-30).
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| CN201911199112.3A CN110981575A (en) | 2019-11-29 | 2019-11-29 | Fertilizer containing medium trace elements and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594225A (en) * | 2004-06-18 | 2005-03-16 | 李成义 | Series special fertilizer prepared by urban sludge and its preparation method |
| CN1793073A (en) * | 2005-11-15 | 2006-06-28 | 青岛地恩地生物科技有限公司 | Process for mfg. biological organic fertilizer by urban mud |
| CN101429066A (en) * | 2008-11-22 | 2009-05-13 | 寿光蔡伦中科肥料有限责任公司 | Method for producing fertilizer with papermaking sewage sludge |
| CN101525257A (en) * | 2009-04-30 | 2009-09-09 | 张芝 | New process for producing compound fertilizer by municipal sludge |
| BR102019008757A2 (en) * | 2019-04-30 | 2019-11-12 | Ambitec Solucoes Ambientais Ltda | soil compost organic compost |
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- 2019-11-29 CN CN201911199112.3A patent/CN110981575A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594225A (en) * | 2004-06-18 | 2005-03-16 | 李成义 | Series special fertilizer prepared by urban sludge and its preparation method |
| CN1793073A (en) * | 2005-11-15 | 2006-06-28 | 青岛地恩地生物科技有限公司 | Process for mfg. biological organic fertilizer by urban mud |
| CN101429066A (en) * | 2008-11-22 | 2009-05-13 | 寿光蔡伦中科肥料有限责任公司 | Method for producing fertilizer with papermaking sewage sludge |
| CN101525257A (en) * | 2009-04-30 | 2009-09-09 | 张芝 | New process for producing compound fertilizer by municipal sludge |
| BR102019008757A2 (en) * | 2019-04-30 | 2019-11-12 | Ambitec Solucoes Ambientais Ltda | soil compost organic compost |
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Application publication date: 20200410 |