Technological process and method for preparing water-soluble foliar fertilizer from wild jujube liquid

Abstract

The invention discloses a technological process and method for preparing a water-soluble foliar fertilizer from a wild jujube liquid, and relates to the technical field of preparation of the water-soluble foliar fertilizer from the wild jujube liquid, and the technological process comprises the steps of raw material treatment and fermentation, fermentation biogas collection, fermentation biogas utilization, biogas heat energy circulation heat supply, wild jujube liquid preparation, waste treatment and water-soluble foliar fertilizer preparation. According to the technological process and method for preparing the water-soluble foliar fertilizer from the wild jujube liquid, biogas generated by the technological process is used for supplying heat to the fermentation process, consumption of external energy is greatly reduced, energy self-circulation of a technological system is achieved, the optimal temperature needed by fermentation is maintained through precise circulating heat supply, the fermentation period is shortened, and the production cost is reduced. The yield and quality of the wild jujube liquid are improved, the liquid base fertilizer is obtained by carrying out solid-liquid separation on the fermentation product, the solid waste and the wild jujube raw material are mixed, pollutant reduction and resource reutilization are achieved, the waste is converted into resources, and the overall cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of preparing water-soluble fertilizer foliar fertilizer from liquid of Chinese jujube, in particular to a process flow and method for preparing water-soluble fertilizer foliar fertilizer from liquid of Chinese jujube. BACKGROUND

[0002] As a kind of medicinal and edible plant resources, Chinese jujube leaves contain rich bioactive components such as flavonoids, saponins and amino acids, which have great potential to be developed into efficient and green water-soluble fertilizer and foliar fertilizer. Currently, the process of preparing liquid fertilizer from Chinese jujube mainly focuses on fermentation method, which converts macromolecular organic matter into small molecular nutrients that are more easily absorbed by crops through microbial degradation.

[0003] The typical process flow of the existing technology is usually as follows: after cleaning and crushing, the Chinese jujube is mixed with water in a certain proportion and placed in a fermentation tank (or fermentation pool) for anaerobic or aerobic fermentation. After fermentation is completed, the fermented mash is subjected to solid-liquid separation, and the obtained liquid is filtered and formulated to obtain the Chinese jujube liquid fertilizer product.

[0004] However, the temperature is extremely sensitive during the preparation process, especially during anaerobic fermentation. In order to maintain a suitable and stable fermentation temperature, most of the existing technologies rely on external energy to heat and insulate the fermentation tank. This is particularly prominent in cold northern regions or winter, resulting in high production cost, significant carbon footprint and weakened market competitiveness of the product. Methane-containing biogas is inevitably produced during anaerobic fermentation, and most of the existing processes do not have effective collection and utilization devices, and are usually directly discharged without organization or simply ignited to empty. This not only is a serious waste of energy, but also brings greenhouse gas emissions and safety hazards. Therefore, a process flow and method for preparing water-soluble fertilizer foliar fertilizer from liquid of Chinese jujube are proposed. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a process flow and method for preparing water-soluble fertilizer foliar fertilizer from liquid of Chinese jujube, which solves the problems raised in the background art.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: a process flow for preparing water-soluble fertilizer foliar fertilizer from liquid of Chinese jujube, comprising raw material treatment and fermentation, fermentation biogas collection, fermentation biogas utilization, biogas heat energy recycling for heating, Chinese jujube liquid preparation, waste treatment, water-soluble fertilizer foliar fertilizer preparation; The raw material treatment and fermentation process: after mixing the Chinese jujube raw material with the recycled material in a certain proportion, it is sent into a closed fermentation tower for anaerobic fermentation; The fermentation biogas collection process: a biogas collection device is installed at the top of the Chinese jujube liquid fermentation tower, and the biogas produced during the fermentation process of the Chinese jujube raw material inside the Chinese jujube liquid fermentation tower is collected and stored; The fermentation biogas utilization process: the collected biogas is introduced into a dedicated biogas combustion furnace for combustion as fuel; The biogas heat energy circulation heating process: the heat generated by combustion is circulated through a medium to the heat exchange system on the fermentation tower to heat the fermentation raw materials inside the fermentation tank; The preparation process of the liquid from the sour jujube: after fermentation, the fermentation product is subjected to solid-liquid separation, and the separated liquid part is the water-soluble fertilizer foliar fertilizer base fertilizer; The waste treatment process: the solid fermentation waste and process tail water generated by separation are further treated and reused; The preparation process of the water-soluble fertilizer foliar fertilizer: according to the required functional effects, the comprehensive effects of the foliar fertilizer are improved, and other natural ingredients are added to the base fertilizer to form a functional formula.

[0007] Preferably, the waste treatment process includes a waste reuse process, and the waste reuse process: the wet waste obtained by solid-liquid separation is mixed with new sour jujube raw materials in a certain proportion, and the process tail water is used as water distribution, and they are together introduced into the fermentation tower for a new round of anaerobic fermentation.

[0008] Preferably, in the fermentation biogas utilization process and the biogas heat energy circulation heating process, the heat generated by the combustion of fermentation biogas is fully utilized through a PLC controller, a temperature sensing system, a proportional regulating valve and a flue gas waste heat recovery device.

[0009] Preferably, the fermentation biogas utilization process: the biogas collected from the top of the sour jujube liquid fermentation tower is first subjected to a gas-water separator to remove part of the condensed water, then the biogas enters a desulfurization tower to remove hydrogen sulfide, the purified biogas enters a dehydration device, the treated clean biogas is sent to a gas storage tank for storage, the biogas in the gas storage tank is transported to a combustion furnace through a pipeline, and the combustion furnace automatically adjusts the air ratio according to the biogas pressure to achieve full combustion.

[0010] Preferably, the heat exchange system of the fermentation tower is divided into a lower heat exchange circuit, a middle heat exchange circuit and an upper heat exchange circuit, and each heat exchange circuit is connected to a circulating pipeline through an adjustable electric regulating valve and a flowmeter for controlling the flow of medium entering the circuit, thereby controlling the heat exchange temperature of each heat exchange circuit.

[0011] Preferably, the temperature sensing system installed inside the fermentation tower is divided into upper, middle and lower temperature sensing zones, and the upper, middle and lower temperature sensing zones are matched with the lower heat exchange circuit, the middle heat exchange circuit and the upper heat exchange circuit, and the heat exchange temperature of the lower heat exchange circuit, the middle heat exchange circuit and the upper heat exchange circuit is controlled through real-time detection of temperature data by the upper, middle and lower temperature sensing zones.

[0012] Preferably, a conical gas collecting hood is installed at the top of the fermentation tower to cover the entire liquid surface.

[0013] The process flow for preparing water-soluble fertilizer foliar fertilizer from Chinese jujube juice comprises the following steps: S1: mix Chinese jujube raw materials with recycled materials according to a preset ratio, and send them into a closed fermentation tower; S2: when fermentation is carried out in the fermentation tower, the fermentation temperature of each region in the fermentation tower is monitored in real time through each temperature sensor in the upper, middle and lower temperature sensing zones; S3: biogas generated by fermentation is collected by a conical gas collecting hood at the top of the fermentation tower, the collected biogas is removed of condensed water and hydrogen sulfide through a desulfurization tower, a dehydration device is used to reduce the dew point of the biogas to below the required value, clean biogas is obtained, and the purified biogas is sent to a gas storage tank for storage; S4: the biogas in the gas storage tank is transported to a special combustion furnace. The combustion furnace automatically adjusts the air ratio according to the biogas pressure to ensure sufficient combustion; S5: according to the real-time monitoring of the fermentation raw material temperature distribution data in the raw material fermentation tower, the biogas flow to the combustion furnace is automatically adjusted according to the temperature feedback of the sensor through a proportional regulating valve, the fire size is controlled, and precise temperature control is realized; S6: the heat generated by combustion is circulated through a medium, and the PLC independently controls the medium flow and temperature of the three heat exchange circuits according to the data of the three temperature sensing zones, so as to ensure the uniformity of the temperature in the fermentation tower; S7: a flue gas waste heat recovery device is used, a flue gas heat exchanger is installed on the flue gas discharge pipeline of the combustion furnace, and the waste heat of the high-temperature flue gas is used to preheat the medium in the heat supply circulation pipeline that returns to the combustion furnace. S8: after fermentation is completed, the fermentation product is subjected to solid-liquid separation, and the liquid part separated is the water-soluble fertilizer foliar fertilizer base fertilizer.

[0014] The present application provides a process flow and method for preparing water-soluble fertilizer foliar fertilizer from Chinese jujube juice, which has the following beneficial effects: The process flow and method for preparing water-soluble fertilizer foliar fertilizer from Chinese jujube juice use the biogas generated by themselves to supply heat for the fermentation process, greatly reducing the consumption of external energy, realizing energy self-circulation of the process system, maintaining the optimal temperature required for fermentation through precise circulating heat supply, shortening the fermentation period, improving the yield and quality of Chinese jujube juice, obtaining liquid base fertilizer through solid-liquid separation of the fermentation product, and mixing solid waste with Chinese jujube raw materials to realize pollution reduction and resource recycling. The present process converts waste into resources, reducing the overall cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 The process flow chart of the present application; Fig. 2 The equipment schematic diagram of the present application. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0017] Please refer to Figs. 1-2 The present application provides a technical solution: a process for preparing water-soluble fertilizer foliar fertilizer from Chinese jujube juice, including raw material processing and fermentation, fermentation biogas collection, fermentation biogas utilization, biogas heat energy recycling heating, Chinese jujube juice preparation, waste treatment, and water-soluble fertilizer foliar fertilizer preparation. The raw material processing and fermentation process: after mixing the Chinese jujube raw materials and recycled materials in a certain proportion, they are sent into a closed fermentation tower for anaerobic fermentation. The fermentation biogas collection process: a biogas collection device is installed at the top of the Chinese jujube juice fermentation tower, and the biogas generated during the fermentation of the Chinese jujube raw materials inside the Chinese jujube juice fermentation tower is collected and stored. The fermentation biogas utilization process: the collected biogas is introduced into a dedicated biogas combustion furnace for combustion as fuel. The biogas heat energy recycling heating process: the heat generated by combustion is circulated through a medium to the heat exchange system on the fermentation tower to heat the fermentation raw materials inside the fermentation tank. The Chinese jujube juice preparation process: after fermentation is completed, the fermentation product is subjected to solid-liquid separation, and the liquid part separated is the water-soluble fertilizer foliar fertilizer base fertilizer. The waste treatment process: the solid fermentation waste and process tail water generated by separation are further treated and recycled. The water-soluble fertilizer foliar fertilizer preparation process: according to the required functional effects, the comprehensive effect of the foliar fertilizer is improved by adding other natural ingredients to the base fertilizer to form a functional formula.

[0018] In the fermentation biogas utilization process and the biogas heat energy recycling heating process, the heat generated by the combustion of fermentation biogas is fully utilized through the PLC controller, the temperature sensing system, the proportional regulating valve, and the flue gas waste heat recovery device.

[0019] The fermentation biogas utilization process: the biogas collected from the top of the Chinese jujube juice fermentation tower is first subjected to gas-water separation to remove part of the condensed water, then the biogas enters a desulfurization tower, the desulfurization tower uses biological desulfurization or dry desulfurization to remove hydrogen sulfide, the purified biogas enters a dehydration device, the clean biogas after treatment is sent to a gas storage tank for storage, the biogas in the gas storage tank is transported to a combustion furnace through a pipeline, the combustion furnace automatically adjusts the air ratio according to the biogas pressure to achieve full combustion.

[0020] The heat exchange system of the fermentation tower is divided into a lower heat exchange circuit, a middle heat exchange circuit and an upper heat exchange circuit, and each heat exchange circuit is connected to a circulating pipeline through an adjustable electric regulating valve and a flowmeter for controlling the medium flow entering the circuit, thereby controlling the heat exchange temperature of each heat exchange circuit.

[0021] The temperature sensing system installed inside the fermentation tower is divided into upper, middle and lower temperature sensing zones, which are matched with the lower heat exchange circuit, the middle heat exchange circuit and the upper heat exchange circuit. The heat exchange temperatures of the lower heat exchange circuit, the middle heat exchange circuit and the upper heat exchange circuit are controlled by real-time detection of temperature data of the upper, middle and lower temperature sensing zones.

[0022] A conical gas collecting hood is installed at the top of the fermentation tower to cover the entire liquid surface.

[0023] The process flow method for preparing water-soluble fertilizer foliar fertilizer from Chinese jujube juice includes the following steps: S1: Mix the Chinese jujube raw materials with the recycled materials according to the preset ratio and send them into a closed fermentation tower; S2: During fermentation inside the fermentation tower, the fermentation temperature of each region inside the fermentation tower is monitored in real time by each temperature sensor in the upper, middle and lower temperature sensing zones; S3: The biogas produced by fermentation is collected by a conical gas collecting hood at the top of the fermentation tower. The collected biogas is dehydrated to reduce the dew point below the required value, and the purified biogas is sent to a gas storage tank for storage; S4: The biogas in the gas storage tank is transported to a special combustion furnace. The combustion furnace automatically adjusts the air ratio according to the biogas pressure to ensure sufficient combustion; S5: According to the real-time monitoring of the fermentation raw material temperature distribution data inside the raw material fermentation tower, the biogas flow to the combustion furnace is automatically adjusted by a proportional regulating valve according to the temperature feedback of the sensor to control the fire size and achieve precise temperature control; S6: The heat generated by combustion is circulated by medium. PLC independently controls the medium flow and temperature of the three heat exchange circuits according to the data of the three temperature sensing zones to ensure uniform temperature inside the fermentation tower; S7: By using a flue gas waste heat recovery device, a flue gas heat exchanger is installed on the flue gas discharge pipeline of the combustion furnace. The waste heat of high-temperature flue gas is used to preheat the medium circulating in the pipeline inside the combustion furnace; S8: After fermentation is completed, the fermentation product is subjected to solid-liquid separation. The liquid part separated is the water-soluble fertilizer foliar fertilizer base fertilizer. The wet waste obtained by solid-liquid separation is mixed with new Chinese jujube raw materials in a certain proportion, and the process tail water is used as water distribution, which are all put into the fermentation tower for a new round of anaerobic fermentation.

[0024] The implementation of the water-soluble fertilizer foliar fertilizer function formula formed by adding other natural ingredients to the base fertilizer is as follows: Example one: flower and fruit protection formula: jujube liquid base fertilizer, potassium dihydrogen phosphate, boric acid, trace element mixture and water.

[0025] Example two: formula for enhancing crop resistance and recovery: jujube liquid base fertilizer, betaine, S-elicitor, vitamin mixture and water.

[0026] The standard parts used in the present application can be purchased from the market, and can be ordered according to the description and drawings, and the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the mechanical, part and equipment adopt the conventional type in the prior art, the installation mode between the equipment is the same as the conventional installation mode in the prior art, such as the two ends of the shaft part are connected by bearings, the connection position of the valve part is provided with a leakage-proof rubber strip, the outer side of the threaded rod or screw rod is provided with a dustproof sleeve, the equipment can be driven by any of the built-in battery or external power supply, etc., the control mode is automatically controlled by the controller, the control circuit of the controller can be realized by simple programming by the person skilled in the art, which belongs to the common knowledge in the art, and the present application is mainly used for protecting the mechanical device, therefore, the control mode and circuit connection of the present application will not be explained in detail, and the external controller mentioned in the specification can control the electrical elements mentioned herein, and the external controller is a conventional known device.

[0027] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical solution and inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A process flow for preparing water-soluble fertilizer foliar fertilizer from Chinese jujube juice, characterized in that: The process comprises raw material processing and fermentation, fermentation biogas collection, fermentation biogas utilization, biogas heat energy recycling heating, acid jujube liquid preparation, waste treatment, water-soluble fertilizer foliar fertilizer preparation; The raw material processing and fermentation process comprises the following steps: mixing the acid jujube raw material and the recycled material according to a certain proportion, and then feeding them into a closed fermentation tower for anaerobic fermentation; The fermentation biogas collection process comprises the following steps: installing a biogas collection device on the top of the acid jujube liquid fermentation tower, and collecting and storing the biogas generated during the fermentation of the acid jujube raw material in the acid jujube liquid fermentation tower; The fermentation biogas utilization process comprises the following steps: guiding the collected biogas into a dedicated biogas combustion furnace for combustion as fuel; The biogas heat energy recycling heating process comprises the following steps: guiding the heat generated by combustion to the heat exchange system on the fermentation tower through a medium flow to heat the fermentation raw material in the fermentation tank; The acid jujube liquid preparation process comprises the following steps: after the fermentation is completed, the fermentation product is subjected to solid-liquid separation, and the separated liquid part is the water-soluble fertilizer foliar fertilizer base fertilizer; The waste treatment process comprises the following steps: further treating the solid-state fermentation waste and process tail water generated by the separation, and recycling them; The water-soluble fertilizer foliar fertilizer preparation process comprises the following steps: according to the required functional effect, the comprehensive effect of the foliar fertilizer is improved by adding other natural ingredients to the base fertilizer to form a functional formula.

2. The process flow and method for preparing water-soluble fertilizer foliar fertilizer from acid jujube juice according to claim 1, characterized in that: The waste treatment process comprises a waste recycling process, and the waste recycling process comprises the following steps: mixing the wet waste obtained by solid-liquid separation with new acid jujube raw material according to a certain proportion, and using the process tail water as water distribution, and then feeding them into the fermentation tower for a new round of anaerobic fermentation.

3. The process flow and method for preparing water-soluble fertilizer foliar fertilizer from acid jujube juice according to claim 1, characterized in that: In the fermentation biogas utilization process and the biogas heat energy recycling heating process, the heat generated by the combustion of the fermentation biogas is fully utilized through a PLC controller, a temperature sensing system, a proportional regulating valve and a flue gas waste heat recovery device.

4. The process flow and method for preparing water-soluble fertilizer foliar fertilizer from acid jujube juice according to claim 1, characterized in that: The fermentation biogas utilization process comprises the following steps: collecting the biogas from the top of the acid jujube liquid fermentation tower, removing part of the condensed water through a gas-water separator, then feeding the biogas into a desulfurization tower to remove hydrogen sulfide, feeding the purified biogas into a dehydration device, feeding the treated clean biogas into a gas storage tank for storage, and feeding the biogas in the gas storage tank into a combustion furnace through a pipeline, and the combustion furnace automatically adjusts the air ratio according to the biogas pressure to achieve full combustion.

5. The process flow and method for preparing water-soluble fertilizer foliar fertilizer from acid jujube juice according to claim 1, characterized in that: The fermentation tower heat exchange system comprises a lower heat exchange circuit, a middle heat exchange circuit and an upper heat exchange circuit, and each heat exchange circuit is connected to a circulating pipeline through an adjustable electric regulating valve and a flowmeter for controlling the flow of the medium entering the circuit and thus controlling the heat exchange temperature of each heat exchange circuit.

6. The process flow and method for preparing water-soluble fertilizer foliar fertilizer from acid jujube juice according to claim 1, characterized in that: The temperature sensing system installed in the fermentation tower comprises an upper temperature sensing zone, a middle temperature sensing zone and a lower temperature sensing zone, which are matched with the lower heat exchange circuit, the middle heat exchange circuit and the upper heat exchange circuit, and the heat exchange temperature of the lower heat exchange circuit, the middle heat exchange circuit and the upper heat exchange circuit is controlled by the real-time detection of the temperature data of the upper temperature sensing zone, the middle temperature sensing zone and the lower temperature sensing zone.

7. The process flow and method for preparing water-soluble fertilizer foliar fertilizer from acid jujube juice according to claim 1, characterized in that: A conical gas collecting hood is installed on the top of the fermentation tower to cover the entire liquid surface.

8. The process for the preparation of water soluble foliar fertilizer from the liquid of the fruit of Elaeagnus commutata based on claims 1-7 characterized by: The process comprises the following steps: S1: mixing the acid jujube raw material and the recycled material according to a predetermined proportion, and feeding them into a closed fermentation tower; S2: during the fermentation in the fermentation tower, the fermentation temperature in each region of the fermentation tower is monitored in real time by each temperature sensor in the upper, middle and lower temperature sensing zones. S3: The biogas produced by fermentation is collected by a conical gas collecting hood at the top of the fermentation tower. The collected biogas is removed of condensed water and hydrogen sulfide by a desulfurization tower. A dehydration device is used to reduce the dew point of the biogas to below the required value, obtaining clean biogas. The purified biogas is sent to a gas storage tank for storage. S4: The biogas in the gas storage tank is transported to a dedicated combustion furnace. The combustion furnace automatically adjusts the air ratio according to the biogas pressure to ensure sufficient combustion. S5: According to the real-time monitoring of the temperature distribution data of the fermentation raw materials inside the fermentation tower, the biogas flow to the combustion furnace is automatically adjusted by a proportional regulating valve according to the temperature feedback of the sensor, controlling the fire size and achieving precise temperature control. S6: The heat generated by combustion is circulated by a medium. The PLC independently controls the medium flow and temperature of the three heat exchange circuits according to the data of the three temperature sensing areas, ensuring uniform temperature inside the fermentation tower. S7: By using a flue gas waste heat recovery device, a flue gas heat exchanger is installed on the flue gas discharge pipeline of the combustion furnace. The waste heat of high-temperature flue gas is used to preheat the medium inside the heat supply circulation pipeline that returns to the combustion furnace. S8: After fermentation is completed, the fermentation product is subjected to solid-liquid separation. The liquid part separated is the water-soluble fertilizer foliar fertilizer base fertilizer.

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