CN111170790A - Method for preparing water-soluble liquid fertilizer from household classified kitchen waste - Google Patents
Method for preparing water-soluble liquid fertilizer from household classified kitchen waste Download PDFInfo
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- CN111170790A CN111170790A CN202010087403.XA CN202010087403A CN111170790A CN 111170790 A CN111170790 A CN 111170790A CN 202010087403 A CN202010087403 A CN 202010087403A CN 111170790 A CN111170790 A CN 111170790A
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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
- C05D9/02—Other inorganic fertilisers containing trace elements
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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
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Abstract
The invention discloses a method for preparing water-soluble liquid fertilizer from household classified kitchen waste, belonging to the field of kitchen waste recycling treatment. The method for preparing the water-soluble liquid fertilizer by treating the household classified kitchen garbage has the advantages that the treatment time is short, only 6 hours are needed, only 2% of impurities which are not easy to hydrolyze are obtained in the treatment process, the impurities are treated by a government sanitation department, 98% of the impurities are recycled, and the generated small-molecular organic liquid fertilizer is suitable for water and fertilizer integration of modern agriculture and is used for drip irrigation, micro irrigation and unmanned aerial vehicle fertilization; the treatment process does not discharge waste water, waste gas and odor, is a water-soluble liquid fertilizer product with high added value, changes waste into valuable, has small application amount and good application effect, improves soil and improves the quality of agricultural products.
Description
Technical Field
The invention belongs to the technical field of resourceful treatment of kitchen waste, and particularly relates to a method for preparing water-soluble liquid fertilizer from household classified kitchen waste.
Background
At present, two treatment methods for household compulsory classification of kitchen garbage basically exist, one is aerobic fermentation, then solid-water separation, organic sewage treatment is carried out on sewage, the separated slag is buried or incinerated, the fermentation time is long, and secondary pollution of greenhouse gas, especially odor pollution, is generated. This method is actually a reduction, and is not rendered harmless. The other method is anaerobic fermentation to produce marsh gas, marsh liquid and marsh slag. After biogas is purified, the fuel gas is used for generating power, biogas slurry is treated by high-concentration organic sewage and is difficult to discharge up to the standard, most of biogas residues are buried or burned, and a small amount of biogas residues are used as organic fertilizer additives. The method also has the disadvantages that the fermentation time is as long as one month to two months, and greenhouse gas pollution, especially foul smell pollution is generated in the fermentation process. The method is more profitable than power generation.
Disclosure of Invention
The invention aims to provide a method for preparing water-soluble liquid fertilizer from household classified kitchen waste, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for preparing water-soluble liquid fertilizer from household classified kitchen garbage comprises the following steps:
s1, pulping: the classified kitchen garbage is barreled and then transported to a treatment plant, the garbage in the garbage channel is poured into a storage tank by a lifting and dumping device, the garbage enters a crusher to be crushed, and the crushed garbage is placed in a slurry forming machine to be prepared into slurry;
s2, hydrolysis: putting the slurry into a reaction tank, adding a catalyst for catalytic reaction, placing the raw materials subjected to catalytic reaction into a rotary sieve for sieving, handing the obtained waste residues to a sanitation department, and placing the slurry into a hydrolysis tank for chemical catalytic hydrolysis;
s3, batching: grinding the material after chemical catalytic hydrolysis in a grinder to colloid the material, centrifuging the colloid material in a centrifuge to obtain centrifugal slag, hydrolyzing and grinding the centrifugal slag, adding the filtrate in a material compounding tank, and compounding with dissolved chemical fertilizer and trace element fertilizer in certain proportion;
s4, fertilizer forming and packaging: and (3) putting the proportioned raw materials into a vacuum evaporation and concentration unit for evaporation and concentration, evaporating redundant water, cooling and recovering the obtained water, adding a stabilizer into the concentrated solution for stabilization, metering, canning and warehousing the product.
The invention also has the following technical scheme:
in said S1, the crusher comprises coarse crushing and fine crushing.
In the step S1, during pulping, the piston hot air compressor is used to pressurize the pulping machine and regulate the pressure for pulping.
The pressure of the piston hot air compressor is controlled to be 0.3 Mpa-0.6 Mpa, and the temperature of hot air is controlled to be 110 ℃ to 130 ℃.
In the S2, the catalyst for chemical catalytic hydrolysis is solid acid, and the addition amount of the solid acid is 2-5% of that of the water-soluble liquid fertilizer.
In S2, during hydrolysis, the piston hot air compressor is used for pressurizing and regulating the pressure of the hydrolysis tank, and fan forced circulation indirect heating is carried out through electric heating air to accelerate the efficiency of chemical catalytic hydrolysis.
The pressure of the piston compressor is controlled to be 0.6Mpa to 0.9Mpa, the reaction temperature is controlled to be 110 ℃ to 120 ℃, and the reaction time is controlled to be 1h to 4 h.
In S3, the grinding machine includes coarse grinding and fine grinding.
In the S3, the dissolved fertilizer is a fertilizer containing any one or a combination of several of nitrogen, phosphorus pentoxide and potassium oxide, and the total amount of the dissolved fertilizer is 8-10% of the water-soluble fertilizer; the dissolved trace element fertilizer is any one or more of a mixed fertilizer containing single metal of iron, manganese, copernicium, zinc, molybdenum and boron, and the total amount of the dissolved trace element fertilizer is 2-5% of the water-soluble fertilizer.
In the S4, the stabilizer is any one of polyacrylic acid, polyvinyl alcohol and polyvinylpyrrolidone.
Compared with the prior art, the invention has the beneficial effects that:
the method for preparing the water-soluble liquid fertilizer by treating the household classified kitchen garbage has the advantages that the treatment time is short, only 6 hours are needed, only 2% of impurities which are not easy to hydrolyze are obtained in the treatment process, the impurities are treated by a government sanitation department, 98% of the impurities are recycled, and the generated small-molecular organic liquid fertilizer is suitable for water and fertilizer integration of modern agriculture and is used for drip irrigation, micro irrigation and unmanned aerial vehicle fertilization; the treatment process does not discharge waste water, waste gas and odor, is a water-soluble liquid fertilizer product with high added value, changes waste into valuable, has small application amount and good application effect, improves soil and improves the quality of agricultural products.
Drawings
FIG. 1 is a process flow diagram of a method for producing water-soluble liquid fertilizer from household classified kitchen waste;
Detailed Description
The present invention will be further described with reference to the following examples.
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple modifications of the method of the present invention based on the concept of the present invention are within the scope of the claimed invention.
Example 1
Referring to fig. 1, the invention provides a method for preparing water-soluble liquid fertilizer from household classified kitchen waste, which comprises the following steps:
s1, pulping: the classified kitchen garbage is barreled and then transported to a treatment plant, the garbage in the garbage bin is poured into a storage tank by a lifting and dumping device, the garbage enters a crusher to be crushed, the garbage is coarsely crushed and finely crushed by the crusher, the garbage is placed in a pulping machine, the pressure of a piston hot air compressor is controlled to be 0.3-0.6 Mpa, the temperature of hot air is controlled to be 110-130 ℃, and the pulping machine is pressurized and pressure-regulated by the piston hot air compressor to prepare pulp.
S2, hydrolysis: putting the slurry into a reaction tank, adding solid acid with the addition of 2-5% of the water-soluble liquid fertilizer for catalytic reaction, putting the raw material subjected to catalytic reaction into a rotary sieve for sieving, handing the obtained waste residues by a sanitation department, and putting the slurry into a hydrolysis tank for chemical catalytic hydrolysis; during hydrolysis, the pressure of the plug compressor is controlled to be 0.6-0.9 Mpa, the reaction temperature is controlled to be 110-120 ℃, the reaction time is controlled to be 1-4 h, the piston hot air compressor is used for pressurizing and regulating the pressure of the hydrolysis tank, and fan forced circulation indirect heating is carried out through electric heating air to accelerate the efficiency of chemical catalytic hydrolysis.
S3, batching: placing the material after chemical catalytic hydrolysis in a grinder, firstly carrying out coarse grinding and then carrying out fine grinding to enable the raw material to be gelatinized, then placing the gelatinized raw material in a centrifuge for centrifugal separation, returning the obtained centrifugal slag to hydrolysis and grinding, placing the obtained filtrate in a proportioning tank, and proportioning by using the dissolved fertilizer and the trace element fertilizer according to a proportion.
Wherein the dissolved fertilizer is a fertilizer containing any one or a combination of several of nitrogen, phosphorus pentoxide and potassium oxide, and the total amount of the dissolved fertilizer is 8-10% of that of the water-soluble fertilizer; the dissolved trace element fertilizer is any one or more of a mixed fertilizer containing single metal of iron, manganese, copernicium, zinc, molybdenum and boron, and the total amount of the dissolved trace element fertilizer is 2-5% of the water-soluble fertilizer.
S4, fertilizer forming and packaging: putting the mixed raw materials into a vacuum evaporation concentration unit for evaporation and concentration, evaporating redundant water, cooling and recovering the obtained water, adding polyacrylic acid, polyvinyl alcohol or polyvinylpyrrolidone into the concentrated solution for stabilization, metering and canning, and putting the product into a warehouse.
The specific implementation case is as follows:
10 tons of household classified kitchen waste is treated every day (20 hours), 0.5 ton of household classified kitchen waste is treated every hour on average, the garbage can is transported to a treatment plant by a transport vehicle, the garbage in a garbage bin is poured into a storage tank by a lifting and dumping device to be crushed in a crusher, the garbage is crushed into paste, the garbage is coarsely crushed and finely crushed by the crusher, the garbage is placed in a slurry forming machine, the pressure of a piston hot air compressor is controlled to be 0.3 Mpa-0.6 Mpa, the temperature of hot air is controlled to be 110-130 ℃, the temperature is kept for 20 minutes, the crushed kitchen waste is converted into slurry material from the paste, the slurry is placed in a reaction tank, solid acid with the addition of 2-5% of water-soluble liquid fertilizer is added for catalytic reaction, the raw material after the reaction is placed in a rotary sieve for sieving, and the impurities are sieved, the sundries account for about 2 percent of the kitchen garbage, namely 0.2 ton per day, and are separately treated by the environmental sanitation department. The weight of the impurity slurry with 2 percent of deduction is 9.8 tons per day, the water content is 90 percent, namely 8.82 tons, and the dry basis is 0.98 ton. Placing the slurry in a hydrolysis tank, heating the hot air in a heater to 300 ℃, performing indirect cyclic heating on the hydrolysis tank by using a high-temperature fan, controlling the pressure of a plug compressor to be 0.6-0.9 Mpa, simultaneously turning on a piston air compressor to directly heat the slurry in the hydrolysis tank, stopping heating when the temperature of the slurry in the hydrolysis tank reaches 115-120 ℃, and maintaining the hydrolysis reaction for 1-4 h. After the hydrolysis reaction is finished, the slurry is conveyed into a grinding machine for grinding, after the coarse grinding and the fine grinding are carried out by the grinding machine, the raw material is in a colloid shape, then the colloid raw material is placed in a centrifugal machine for centrifugal separation, the obtained centrifugal slag is returned for hydrolysis and grinding, the obtained filtrate is placed in a proportioning tank, dissolved fertilizer and trace element fertilizer are added according to the proportion that the water-soluble fertilizer is 18 percent of the organic slurry, 1.76 tons of the water-soluble trace element fertilizer is added every day, and the proportion of the water-soluble fertilizer is 7 percent. Adding 0.7 ton of the mixture with the water content of 20% every day for blending, putting the blended raw materials into a vacuum evaporation concentration unit for evaporation and concentration, and evaporating 9.22% of redundant water, namely 1.3 ton. And the condensed water formed after the evaporated steam is cooled is recycled. After concentration, the concentrated solution is placed in a stabilizing unit, and a certain amount of stabilizing agent is added for stabilizing treatment for 1 hour, so that the water-soluble fertilizer is stabilized, and does not crystallize, precipitate or delaminate. And finally, metering and canning through a metering and canning device to obtain 16.36 tons of the liquid fertilizer product with the concentration of the hydrolyzed small-molecular water-soluble liquid fertilizer product of 22.4 percent. And (5) warehousing products.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A method for preparing water-soluble liquid fertilizer from household classified kitchen garbage is characterized by comprising the following steps:
s1, pulping: the classified kitchen garbage is barreled and then transported to a treatment plant, the garbage in the garbage channel is poured into a storage tank by a lifting and dumping device, the garbage enters a crusher to be crushed, and the crushed garbage is placed in a slurry forming machine to be prepared into slurry;
s2, hydrolysis: putting the slurry into a reaction tank, adding a catalyst for catalytic reaction, placing the raw materials subjected to catalytic reaction into a rotary sieve for sieving, handing the obtained waste residues to a sanitation department, and placing the slurry into a hydrolysis tank for chemical catalytic hydrolysis;
s3, batching: grinding the material after chemical catalytic hydrolysis in a grinder to colloid the material, centrifuging the colloid material in a centrifuge to obtain centrifugal slag, hydrolyzing and grinding the centrifugal slag, adding the filtrate in a material compounding tank, and compounding with dissolved chemical fertilizer and trace element fertilizer in certain proportion;
s4, fertilizer forming and packaging: and (3) putting the proportioned raw materials into a vacuum evaporation and concentration unit for evaporation and concentration, evaporating redundant water, cooling and recovering the obtained water, adding a stabilizer into the concentrated solution for stabilization, metering, canning and warehousing the product.
2. The method for producing water-soluble liquid fertilizer from household classified kitchen garbage according to claim 1, wherein in S1, the crusher comprises coarse crushing and fine crushing.
3. The method for producing water-soluble liquid fertilizer from household classified kitchen waste as claimed in claim 1, wherein in step S1, the pulping machine is pressurized and pressure-regulated by a piston hot air compressor.
4. The method for preparing the water-soluble liquid fertilizer from the household classified kitchen wastes as claimed in claim 3, wherein the pressure of the piston hot air compressor is controlled to be 0.3MPa to 0.6MPa, and the temperature of the hot air is controlled to be 110 ℃ to 130 ℃.
5. The method for producing the water-soluble liquid fertilizer from the household classified kitchen waste as claimed in claim 1, wherein in the step S2, the catalyst for chemical catalytic hydrolysis is solid acid, and the addition amount of the solid acid is 2-5% of the water-soluble liquid fertilizer.
6. The method for preparing water-soluble liquid fertilizer from household classified kitchen wastes as claimed in claim 1, wherein in step S2, the efficiency of chemical catalytic hydrolysis is increased by pressurizing and regulating the pressure of the hydrolysis tank with a piston hot air compressor and indirectly heating with forced circulation of a fan by electrically heating air.
7. The method for preparing the water-soluble liquid fertilizer from the household classified kitchen wastes as claimed in claim 6, wherein the pressure of the piston compressor is controlled to be 0.6MPa to 0.9MPa, the reaction temperature is controlled to be 110 ℃ to 120 ℃, and the reaction time is controlled to be 1h to 4 h.
8. The method for producing water-soluble liquid fertilizer from household classified kitchen garbage according to claim 1, wherein in S3, the grinder comprises coarse grinding and fine grinding.
9. The method for producing the water-soluble liquid fertilizer from the household classified kitchen wastes as claimed in claim 1, wherein in S3, the dissolved fertilizer is a fertilizer containing any one or a combination of several of nitrogen, phosphorus pentoxide and potassium oxide, and the total amount of the dissolved fertilizer is 8-10% of the water-soluble fertilizer; the dissolved trace element fertilizer is any one or more of a mixed fertilizer containing single metal of iron, manganese, copernicium, zinc, molybdenum and boron, and the total amount of the dissolved trace element fertilizer is 2-5% of the water-soluble fertilizer.
10. The method for producing the water-soluble liquid fertilizer from the household classified kitchen waste as claimed in claim 1, wherein in the step S4, the stabilizer is any one of polyacrylic acid, polyvinyl alcohol and polyvinyl pyrrolidone.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010087403.XA CN111170790A (en) | 2020-02-11 | 2020-02-11 | Method for preparing water-soluble liquid fertilizer from household classified kitchen waste |
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| CN202010087403.XA CN111170790A (en) | 2020-02-11 | 2020-02-11 | Method for preparing water-soluble liquid fertilizer from household classified kitchen waste |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112939667A (en) * | 2021-03-11 | 2021-06-11 | 刘文治 | Total-nutrient water-soluble fertilizer and production method thereof |
| CN116854523A (en) * | 2023-06-01 | 2023-10-10 | 播乐(海南)生态科技院(有限合伙) | Preparation method, product and application of small molecular organic water-soluble fertilizer |
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| EP0817763A1 (en) * | 1995-03-13 | 1998-01-14 | Jerry W. Finney | Biomass reduction and bioremediation processes and products |
| CN101863688A (en) * | 2009-04-16 | 2010-10-20 | 宋荟 | Method for preparing water soluble quick-acting organic fertilizer from activated sludge |
| CN107226723A (en) * | 2017-06-12 | 2017-10-03 | 吉林农业大学 | A kind of method that utilization agricultural organic waste degraded prepares fertilizer |
| CN109081758A (en) * | 2018-09-30 | 2018-12-25 | 上海集熠节能环保技术有限公司 | The production method and energy fertilizer finished product of kitchen garbage production small molecule organic energy fertilizer |
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2020
- 2020-02-11 CN CN202010087403.XA patent/CN111170790A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0817763A1 (en) * | 1995-03-13 | 1998-01-14 | Jerry W. Finney | Biomass reduction and bioremediation processes and products |
| CN101863688A (en) * | 2009-04-16 | 2010-10-20 | 宋荟 | Method for preparing water soluble quick-acting organic fertilizer from activated sludge |
| CN107226723A (en) * | 2017-06-12 | 2017-10-03 | 吉林农业大学 | A kind of method that utilization agricultural organic waste degraded prepares fertilizer |
| CN109081758A (en) * | 2018-09-30 | 2018-12-25 | 上海集熠节能环保技术有限公司 | The production method and energy fertilizer finished product of kitchen garbage production small molecule organic energy fertilizer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112939667A (en) * | 2021-03-11 | 2021-06-11 | 刘文治 | Total-nutrient water-soluble fertilizer and production method thereof |
| WO2022188317A1 (en) * | 2021-03-11 | 2022-09-15 | 刘文治 | Full-nutrient water-soluble fertilizer and production method therefor |
| CN116854523A (en) * | 2023-06-01 | 2023-10-10 | 播乐(海南)生态科技院(有限合伙) | Preparation method, product and application of small molecular organic water-soluble fertilizer |
| CN116854523B (en) * | 2023-06-01 | 2024-11-08 | 播乐(海南)生态科技院(有限合伙) | A method for preparing small molecule organic water-soluble fertilizer, and its products and applications |
| WO2024245130A1 (en) * | 2023-06-01 | 2024-12-05 | 贺敏 | Method for preparing small-molecule organic water-soluble fertilizer using biomass and waste thereof, and product and application |
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Application publication date: 20200519 |