Method for producing liquid compound fertilizer by using biogas slurry

A technology of compound fertilizer and biogas slurry, which is applied in application, fertilization equipment, fertilizer mixture, etc., can solve the problems of increasing fertilizer production cost, limiting production speed, and secondary pollution, so as to improve agricultural utilization value, increase production efficiency, and avoid loss effect

Active Publication Date: 2015-03-25
唐山盈和瑞环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The direct discharge of these biogas slurry into the environment will bring serious secondary pollution
Studies have shown that biogas slurry is a high-quality organic fertilizer rich in N, P, K and other elements essential for plant growth, but it is difficult to be widely used due to its nutrient imbalance and low fertilizer efficiency
[0003] The existing method of using biogas to produce liquid compound fertilizer requires heating the biogas slurry to 70°C. Although the properties of the biogas slurry are relatively stable, the high energy consumption required for heating directly increases the production cost of fertilizers; the high temperature state of 70°C It also deactivates the active substances in the biogas slurry due to high temperature denaturation, which reduces the fertilizer efficiency of the finished fertilizer. In addition, due to the large specific heat capacity of the liquid, it takes more time to heat a large amount of biogas slurry, which also limits the production speed and affects the quality of the product. Productivity

Method used

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  • Method for producing liquid compound fertilizer by using biogas slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Preparation of a widely adaptable flush-release fertilizer

[0037] The fertilizer formula is shown in Table 1:

[0038] Table 1 Formula of widely applicable flush-release fertilizer

[0039] raw material weight percentage Biogas slurry 45% Potassium humate 10% Urea 30% superphosphate 20% Potassium chloride 5%

[0040] Preparation of flush-release fertilizers as described in the table above:

[0041] a. Use a vibrating screening machine to screen and filter the biogas slurry to remove solid particles with a particle size larger than 0.25mm in the biogas slurry;

[0042] b. According to the ratio of 5kg citric acid and 2kg polypropylene glycol per ton of fertilizer, add citric acid as a flocculant and polypropylene glycol as a defoaming agent to the biogas slurry, and then use nitric acid to adjust the pH of the biogas slurry to 5.5-8.5; During the process of adding flocculant and defoamer, conventional e...

Embodiment 2

[0049] Example 2 A special foliar fertilizer for tomatoes

[0050] The fertilizer formula is shown in the table below:

[0051] Table 3 Formula of special foliar fertilizer for tomatoes

[0052] raw material name weight percentage Biogas slurry 90% Urea 4% superphosphate 2% Potassium chloride 1% Potassium humate 1% Ferrous sulfate 0.5% Magnesium sulfate 0.5% copper sulfate 0.2% Manganese sulfate 0.3% Zinc sulfate 0.2% Borax 0.3%

[0053] Preparation of the foliar fertilizers recorded in the table above:

[0054] a. Use a vibrating screening machine to screen and filter the biogas slurry to remove solid particles with a particle size larger than 0.25mm in the biogas slurry;

[0055]b. According to the ratio of 5kg citric acid and 2kg polypropylene glycol per ton of fertilizer, add citric acid as a flocculant and polypropylene glycol as a defoamer to the biogas slurry, and then adjust the...

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Abstract

The invention provides a method for producing liquid compound fertilizer using biogas slurry, which is characterized in that it comprises the following steps: a. screening and filtering the biogas slurry to remove solid particles with a particle size greater than 0.25mm in the biogas slurry; b. Add flocculants, defoamers and humic acid substances to the biogas slurry, and then adjust the pH of the biogas slurry to 5.5-8.5; measure the content of various nutrients in the biogas slurry; c, take part of the biogas slurry in step b for Heating to 30-40°C, adding supplementary elements to the heated biogas slurry, and then stirring until dissolved; d. Adding the heated biogas slurry with supplementary elements in step c to the biogas slurry in step b that has not been taken In, after dilution, mix and stir until uniform. The beneficial effects of the invention are: the technical solution of the invention reduces the time and energy consumption required for heating, and improves the production efficiency.

Description

technical field [0001] The invention relates to a method for producing liquid compound fertilizer by utilizing biogas slurry. Background technique [0002] In today's increasingly scarce energy, the use of biogas provides a solution to the energy crisis. Then large and medium-sized biogas projects will produce a large amount of biogas slurry after anaerobic fermentation of organic waste. The direct discharge of these biogas slurry into the environment will cause serious secondary pollution. Studies have shown that biogas slurry is a high-quality organic fertilizer rich in N, P, K and other elements essential for plant growth, but it is difficult to be widely used due to its nutrient imbalance and low fertilizer efficiency. [0003] The existing method of using biogas to produce liquid compound fertilizer requires heating the biogas slurry to 70°C. Although the properties of the biogas slurry are relatively stable, the high energy consumption required for heating directly i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00
Inventor 张伟
Owner 唐山盈和瑞环保设备有限公司
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