A method and system for producing fertilizer containing glutamic acid fermentation waste liquid

Abstract

The present invention belongs to the technical field of fertilizer production, and discloses a fertilizer production method and system containing glutamic acid fermentation waste liquid, the method includes soil conditioner production and organic-inorganic compound fertilizer production, and the fertilizer production system containing glutamic acid fermentation waste liquid is provided with a detection terminal for detecting fertilizer composition; a soil conditioner device connected to the detection terminal for realizing soil conditioning; and an organic-inorganic compound fertilizer preparation device connected to the detection terminal for realizing fertilizer conditioning. By adding 200-300 mesh primary granulation fertilizer powder from the initial batching, adjusting the proportion of granulation liquid in dry matter, especially the proportion of fine particle organic matter, improving material conditions, thereby effectively reducing the spraying granulation temperature, shortening the residence time of the liquid in the granulator, and then effectively improving the solubility of the final product.

Description

Technical Field

[0001] The invention belongs to the technical field of fertilizer production, and in particular relates to a method and system for producing fertilizer containing glutamic acid fermentation waste liquid. Background Art

[0002] At present, after glutamic acid is extracted from the fermentation liquid, the waste liquid contains a large amount of bacterial protein and organic matter. Usually, bacterial protein is extracted to make protein feed, and the waste liquid after extraction is concentrated and then spray granulated to make soil conditioner or organic-inorganic compound fertilizer. However, in the prior art, if spray granulation is directly performed, the high temperature (650-680℃ at the head and 130-150℃ at the tail) granulation process will cause low solubility of the finished fertilizer, affecting the fertilizer efficiency; on the other hand, organic matter will produce a large odorous smoke at high temperature, causing environmental pollution and increasing the cost of environmental protection treatment.

[0003] Although the country does not have relevant standards for fertilizer solubility, solubility has a direct impact on fertilizer effectiveness and utilization rate.

[0004] The company's internal solubility determination method is as follows:

[0005] Weigh a certain mass of fertilizer sample, put it into a 400ml beaker, add 100ml of distilled water, stir at a certain speed at 20℃ for 1h, then pass it through a 100-mesh sieve, rinse the material on the sieve, dry it and weigh it.

[0006] W(%)=(M1-M0) / M*100

[0007] Where: W—solubility

[0008] M1—Mass of dried material plus sieve

[0009] M0—mass of the sieve

[0010] M—Sample quality

[0011] At present, in order to solve the problem of low fertilizer solubility, the main processes adopted in the industry include:

[0012] Process to increase the organic matter content of materials: This process is to add a large amount of organic matter such as humic acid to the concentrated waste liquid, increase the organic matter content in the material, shorten the granulation time during the spray granulation process, and thus increase the solubility of the fertilizer. However, the disadvantage of this process is that the amount of humic acid added is large, usually accounting for 30% of the liquid, which increases the product cost; at the same time, the organic matter burns at high temperature to produce a large amount of odorous smoke, causing air pollution, which is not conducive to environmental protection.

[0013] Sugar and acid reduction process: This process adds lactic acid bacteria to the waste liquid and uses lactic acid bacteria fermentation to reduce the residual sugar and organic acid content in the waste liquid, avoiding the low solubility and flue gas pollution caused by sugar gelatinization and organic acid combustion during high-temperature granulation. However, this technology consumes the residual sugar and organic acid by adding lactic acid bacteria fermentation, which has a long cycle and high cost. In addition, since it does not effectively improve the organic matter content in the material components, the solubility improvement effect is average.

[0014] Through the above analysis, the problems and defects of the prior art are as follows:

[0015] (1) By adding a large amount of humic acid to improve the organic matter content in the material components, due to the large amount of humic acid added, usually accounting for 30% of the liquid feed, the product cost increases and the odor of the flue gas in the granulation process is difficult to control.

[0016] (2) Although the solubility of the final product can be improved to a certain extent through the process of reducing sugar and acid, the process has a long cycle and requires large equipment investment, which is not conducive to promotion.

[0017] The difficulty of solving the above problems and defects is:

[0018] After the fermentation waste liquid is concentrated and adjusted, it passes through the spray granulation process. The material is atomized at a high temperature of about 600°C and then forms granular fertilizer with small particles. In order to control the solubility of the final product, it is necessary to adjust the material components. However, the production of organic fertilizer from glutamate fermentation waste liquid itself is a waste recycling technology. If exogenous raw materials or high-input process technology are used, it will inevitably lead to an increase in production costs and lose the meaning of waste liquid recycling.

[0019] In addition, attempts were made to reduce the head temperature and spraying volume, increase the air volume, and modify the internal structure of the granulator. Except for changing the material composition through batching, which had a better effect, other methods had no obvious effect on improving the solubility and only played an auxiliary role.

[0020] The significance of solving the above problems and defects is:

[0021] Through various tests, it is proved that the key to improve the solubility of fertilizers and reduce odor emissions is to change the material composition. Start with increasing the dry matter content of the liquid feed. The added material must be able to make the liquid feed easy to granulate and dry. The material granulates quickly in the granulator and has a short residence time. Only in this way can the temperature at the tail of the machine drop naturally, the solubility can be improved, and the odor can be relatively reduced.

[0022] Through the process technology of the present invention, on the basis of not changing the existing production process, the defective waste generated in the production process is crushed to a certain particle size by grinding equipment and then mixed with fermentation waste liquid concentrate in a certain proportion for spray granulation, thereby effectively solving the problem of low solubility of the final product. In addition, the process is simple to operate, uses waste raw materials, and does not increase costs. Summary of the invention

[0023] In order to solve the problems existing in the prior art, the present invention provides a method and system for producing a fertilizer containing glutamic acid fermentation waste liquid.

[0024] The present invention is achieved in that the method for producing fertilizer containing glutamic acid fermentation waste liquid comprises: producing soil conditioner and producing organic-inorganic compound fertilizer, wherein:

[0025] The soil conditioner production method comprises: concentrated fermentation waste liquid and crushed soil conditioner particles after primary spraying granulation are put into a batching box for mixing; the mixed liquid is sprayed granulated to form soil conditioner, the finished product is put into storage, and the defective product is crushed and then mixed with concentrated post-fermentation waste liquid and granulated;

[0026] The production method of organic-inorganic compound fertilizer includes: concentrated fermentation waste liquid and crushed soil conditioner particles are put into a batching box for mixing, the mixed slurry contains dry matter, potassium chloride, potassium sulfate and ammonium sulfate are added to the slurry in the compound fertilizer batching box to adjust the nitrogen and potassium content to appropriate levels, and then the slurry enters a spray granulator, and magnesium oxide is added during the process to adjust the pH to 5.5-8.0 to prepare the organic-inorganic compound fertilizer.

[0027] Furthermore, in the production of soil conditioners, the concentrated fermentation liquid is controlled at 27-29°Bé, 48-52% dry matter content, and pH 3.0-3.5; the mesh size of the material after crushing is 200-300 mesh; and the material after crushing and mixing with the fermentation waste liquid contains 58-62% dry matter and 31-32°Bé.

[0028] Further, in the production of soil conditioner, the mixed liquid is sprayed and granulated to produce soil conditioner with a pH of 3.0-4.0;

[0029] In the production of organic-inorganic compound fertilizer, the pH value of the organic-inorganic compound fertilizer is 5.5-8.0.

[0030] Furthermore, in the production of organic-inorganic compound fertilizers, the nitrogen / potassium ratio is 12:3-12:4.

[0031] Another object of the present invention is to provide a system for realizing the method for producing fertilizer containing glutamic acid fermentation waste liquid, the system being provided with a detection terminal for detecting the composition of the fertilizer;

[0032] A soil conditioner device connected to the detection terminal for conditioning the soil;

[0033] An organic-inorganic compound fertilizer preparation device connected to a detection terminal for realizing fertilizer regulation.

[0034] Furthermore, a batching box is installed inside the soil conditioner device.

[0035] Furthermore, the interior of the batching box is divided into a plurality of units by partitions, and a mixer is installed inside each of the partition units, and the mixer is gear-connected to a driving device.

[0036] Furthermore, the head and the tail of the batching box are both equipped with heating devices.

[0037] Furthermore, the head temperature of the granulator is 600-650°C, and the tail temperature is 110-130°C.

[0038] Combining all the above technical solutions, the advantages and positive effects of the present invention are as follows:

[0039] First, by adding 200-300 mesh primary granulation fertilizer powder from the initial ingredients, the proportion of granulation liquid in dry matter, especially the proportion of fine particle organic matter, is adjusted to improve material conditions, thereby effectively reducing the spray granulation temperature, shortening the residence time of the liquid in the granulator, and effectively improving the solubility of the final product.

[0040] Second, the organic odor in the granulation process has been effectively controlled. The specific comparison is shown in the following table.

[0041] Product indicators and equipment operating parameters before and after process improvement

[0042] BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 It is a principle structure diagram of a fertilizer production system containing glutamate fermentation waste liquid provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] In view of the problems of low solubility and odorous smoke pollution in the prior art of using fermentation waste liquid spraying to produce organic fertilizer, the present invention provides a fertilizer production method and system containing glutamic acid fermentation waste liquid. The present invention is described in detail below in conjunction with the accompanying drawings.

[0047] Preparation method of soil conditioner: concentrated fermentation waste liquid (27-29°Bé, dry matter content 48-52%, pH 3.0-3.5) and soil conditioner particles (200-300 mesh) crushed by Raymond mill are put into the batching box for mixing. The mixed liquid contains 58-62% dry matter and 31-32°Bé. The mixed liquid is sprayed and granulated to form soil conditioner (pH 3.0-4.0). The finished product is stored in the warehouse. The defective product is crushed by Raymond mill and then mixed with concentrated fermentation waste liquid and granulated, and the cycle is repeated.

[0048] The method for preparing organic-inorganic compound fertilizer is as follows: concentrated fermentation waste liquid (27-29°Bé, dry matter content 48-52%, pH 3.0-3.5) and soil conditioner particles (200-300 mesh) crushed by Raymond mill are put into a batching box for mixing. After mixing, the slurry contains 58-62% dry matter and 31-32°Bé. Potassium chloride, potassium sulfate and ammonium sulfate are added to the slurry in the compound fertilizer batching box to adjust the slurry to a suitable nitrogen and potassium content, and then the slurry enters a spray granulator. During the process, magnesium oxide is added to adjust the pH to 5.5-8.0 to prepare the organic-inorganic compound fertilizer.

[0049] The batching box is 10*10*5 meters, divided into 4 units of 5*5*5, each unit is equipped with a mixer, and in order to facilitate batching and the production of soil-adjusted fertilizers and organic-inorganic fertilizers, the bottoms of the 4 units are interconnected, and 2 pumps are installed for seasoning and circulation.

[0050] Granulator: Granulator head temperature is 600-650℃, tail temperature is 110-130℃.

[0051] The utilization method includes a soil conditioner production method and / or an organic-inorganic compound fertilizer production method, wherein:

[0052] The soil conditioner production method comprises:

[0053] The concentrated fermentation waste liquid and the crushed soil conditioner particles after primary spraying granulation are put into the batching box for mixing. The mixed liquid is made into soil conditioner through spraying granulation, and the finished product is put into storage. The defective products are crushed and mixed with the concentrated fermentation waste liquid and granulated, and the cycle continues.

[0054] The organic-inorganic compound fertilizer preparation method:

[0055] The concentrated fermentation waste liquid and the crushed soil conditioner particles are put into the batching box for mixing. The mixed liquid contains dry matter. The liquid enters the compound fertilizer batching box, potassium chloride, potassium sulfate, and ammonium sulfate are added to adjust the nitrogen and potassium content to the appropriate level, and then enters the spray granulator. During the process, magnesium oxide is added to adjust the pH to 5.5-8.0 to prepare an organic-inorganic compound fertilizer.

[0056] The concentrated fermentation broth is controlled at 27-29°Bé, 48-52% dry matter content, and pH 3.0-3.5;

[0057] The mesh size of the material after crushing is 200-300 mesh;

[0058] After the crushed material is mixed with the fermentation waste liquid, the liquid contains 58-62% dry matter and 31-32°Bé;

[0059] The mixed liquid is sprayed and granulated to form a soil conditioner with a pH of 3.0-4.0;

[0060] The pH of organic-inorganic compound fertilizer is 5.5-8.0;

[0061] Organic-inorganic compound fertilizer can be adjusted to a nitrogen / potassium ratio of 12 / 3 or 12 / 4 as required.

[0062] The batching box is 10*10*5 meters and is divided into 4 units of 5*5*5. Each unit is equipped with a mixer. To facilitate batching and the production of soil-adjusted fertilizers and organic-inorganic fertilizers, the bottoms of the 4 units are interconnected and 2 pumps are installed for seasoning and circulation.

[0063] The head temperature of the granulator is 600-650℃, and the tail temperature is 110-130℃.

[0064] Working principle part:

[0065] The concentrated fermentation waste liquid and the crushed fertilizer particles after primary spray granulation are put into the batching box and the mixture is divided into 1m 3 The concentrated finished liquid is mixed with 20-25% 200 mesh fertilizer powder. The mixed liquid is made into fertilizer granules through spray granulation. The finished products are put into storage, and the defective products are crushed and then mixed with the concentrated post-fermentation waste liquid and granulated, and the cycle continues.

[0066] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A method for producing fertilizer containing glutamic acid fermentation waste liquid, characterized in that: The fertilizer production method containing glutamic acid fermentation waste liquid includes: soil conditioner production and organic-inorganic compound fertilizer production, wherein: The soil conditioner production method comprises: concentrated fermentation waste liquid and crushed soil conditioner particles after primary spraying granulation are put into a batching box for mixing; the mixed liquid is sprayed granulated to form soil conditioner, the finished product is put into storage, and the defective product is crushed and then mixed with concentrated post-fermentation waste liquid and granulated; The production method of organic-inorganic compound fertilizer comprises: concentrated fermentation waste liquid and crushed soil conditioner particles are put into a batching box for mixing, the mixed liquid contains dry matter, the liquid enters the compound fertilizer batching box, potassium chloride, potassium sulfate, and ammonium sulfate are added to adjust the nitrogen and potassium content to a suitable level, and then enters a spray granulator, and magnesium oxide is added during the process to adjust the pH to 5.5-8.0 to prepare the organic-inorganic compound fertilizer; In the production of soil conditioners, the concentrated fermentation liquid is controlled at 27-29°Bé, dry matter content 48-52%, pH 3.0-3.5; the mesh size of the material after crushing is 200-300 mesh; the material after crushing and fermentation waste liquid are mixed to contain 58-62% dry matter and 31-32°Bé; In the production of soil conditioner, the mixed liquid is sprayed and granulated to make soil conditioner with a pH of 3.0-4.0; In the production of organic-inorganic compound fertilizer, the pH value of the organic-inorganic compound fertilizer is 5.5-8.

0.

2. The method for producing fertilizer containing glutamic acid fermentation waste liquid as claimed in claim 1, characterized in that: In the production of organic-inorganic compound fertilizers, the nitrogen / potassium ratio is 12:3-12:

4.

3. A system for realizing the method for producing fertilizer containing glutamic acid fermentation waste liquid as claimed in any one of claims 1 to 2, characterized in that: The system is provided with a detection terminal for detecting the composition of the fertilizer; A soil conditioner device connected to the detection terminal for conditioning the soil; An organic-inorganic compound fertilizer preparation device connected to a detection terminal for realizing fertilizer regulation.

4. The fertilizer production system containing glutamic acid fermentation waste liquid according to claim 3, characterized in that: A batching box is installed inside the soil conditioner device.

5. The fertilizer production system containing glutamic acid fermentation waste liquid according to claim 4, characterized in that: The interior of the batching box is divided into a plurality of units by partitions, and a mixer is installed inside each of the partition units, and the mixer is gear-connected to a driving device.

6. The fertilizer production system containing glutamic acid fermentation waste liquid according to claim 4, characterized in that: The head and tail of the batching box are both equipped with heating devices.

7. The fertilizer production system containing glutamic acid fermentation waste liquid according to claim 3, characterized in that: The head temperature of the granulator is 600-650℃, and the tail temperature is 110-130℃.

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