CN211056976U - Preparation equipment of liquid slow-release fertilizer - Google Patents
Preparation equipment of liquid slow-release fertilizer Download PDFInfo
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- CN211056976U CN211056976U CN201921338986.8U CN201921338986U CN211056976U CN 211056976 U CN211056976 U CN 211056976U CN 201921338986 U CN201921338986 U CN 201921338986U CN 211056976 U CN211056976 U CN 211056976U
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Abstract
The utility model is suitable for a fertilizer equipment technical field provides a fertile preparation equipment of liquid slowly-releasing, including formaldehyde storage tank, aqueous ammonia storage tank, first reation kettle, second reation kettle, raw materials dosing unit, microfilter and first lifting machine, formaldehyde storage tank communicates in first reation kettle, and the aqueous ammonia storage tank is through communicateing in first reation kettle, and first lifting machine sets up between raw materials dosing unit and first reation kettle, and first reation kettle communicates in second reation kettle, and second reation kettle communicates in microfilter, and microfilter communicates in the finished product storage tank. The utility model provides a preparation device of liquid slow release fertilizer, which can be used for storing and using the liquid slow release fertilizer prepared by the device in the northern area in winter; the multi-stage nutrient supply function with quick, medium and long effects is realized; the preparation process flow is simple and convenient to operate; is beneficial to environmental protection; is favorable for large-scale popularization and use.
Description
Technical Field
The utility model belongs to the technical field of fertilizer equipment, especially, relate to a preparation equipment of liquid slowly-releasing fertilizer.
Background
In recent years, with the implementation of national policies such as zero growth of chemical fertilizers and integration of water and fertilizer, liquid fertilizers are gradually favored by farmers due to good water solubility, fast fertilizer efficiency, high utilization rate and convenient use. However, as the liquid fertilizer industry in China starts late, many liquid fertilizer products still have some problems or defects: liquid fertilizer varieties with higher nutrients are easy to crystallize at low temperature, and are not suitable for storage and use in northern areas in winter; the common liquid fertilizer has short fertilizer efficiency period and needs a small amount of application for many times, thereby increasing the labor cost; some manufacturers add urease inhibitors, nitrification inhibitors and other components to prolong the release period of the fertilizer to a certain extent, but the different additives have high requirements on the pH value, the temperature, the humidity and the like of soil, and the effect is not obvious; many liquid fertilizers are blended by a simple physical method, and the product has single function and low technical content.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving at least one of the technical problems, and provides a preparation device of liquid slow release fertilizer, which is characterized in that the liquid slow release fertilizer prepared by the device is not easy to crystallize at low temperature, and can be suitable for storage and use in northern areas in winter; the fertilizer has quick-acting, medium-acting and long-acting multi-level nutrient supply functions, does not need to be applied in small quantity and for multiple times, so that the labor cost is saved, and the release period of the fertilizer is prolonged without adding components such as urease inhibitor, nitrification inhibitor and the like, so that the requirements on the pH value, the temperature, the humidity and the like of soil are wide; the preparation process flow is simple, the operation is convenient, and the production mode of no dust, no waste gas, no waste water and no waste residue is favorable for environmental protection; the equipment has small floor area, less investment and quick response, and is favorable for large-scale popularization and use.
The technical scheme of the utility model is that: a preparation device of a liquid slow-release fertilizer comprises a formaldehyde storage tank, an ammonia water storage tank, a first reaction kettle, a second reaction kettle, a raw material proportioning device, a microfilter and a first elevator used for conveying materials in the raw material proportioning device to the first reaction kettle,
the formaldehyde storage tank through first pipeline communicate in first reation kettle, the aqueous ammonia storage tank through the second pipeline communicate in first reation kettle, first lifting machine set up in raw materials dosing unit with between the first reation kettle, first reation kettle through the third pipeline communicate in the second reation kettle, the second reation kettle through the fourth pipeline communicate in the microfilter, the microfilter communicates in the finished product storage tank through the fifth pipeline.
Optionally, the apparatus further includes a liquid finished product packaging device for packaging and warehousing the liquid slow-release fertilizer, and the finished product storage tank is communicated with the liquid finished product packaging device through a sixth pipeline.
Optionally, the equipment further comprises a preheating mixer for heating the medium elements, the trace elements or/and the nitrogen, phosphorus and potassium raw materials and a second elevator for conveying the medium elements, the trace elements or/and the nitrogen, phosphorus and potassium raw materials in the preheating mixer to the second reaction kettle,
the raw materials dosing unit with preheat and be provided with the compounding belt feeder between the blendor, the second lifting machine set up in preheat the blendor with between the second reation kettle.
Optionally, the preparation equipment further comprises a tap water preheating storage tank, and the tap water preheating storage tank is communicated with the second reaction kettle through a seventh pipeline.
Optionally, the first pipeline is further connected with a formaldehyde pump and a formaldehyde flow meter; the second pipeline is also connected with an ammonia water pump and an ammonia water flowmeter.
Optionally, the number of the micro filters is at least two, and each micro filter is arranged in parallel; the finished product storage tanks are at least two, and all the finished product storage tanks are arranged in parallel.
Optionally, a stirring device and a heating and heat-preserving device are arranged in the formaldehyde storage tank, the ammonia water storage tank, the first reaction kettle and the second reaction kettle.
Optionally, level meters are arranged in the formaldehyde storage tank and the ammonia water storage tank.
Optionally, the formaldehyde storage tank and the ammonia water storage tank are made of 304 stainless steel, and the first reaction kettle and the second reaction kettle are made of 304 stainless steel or 316L stainless steel.
Optionally, the formaldehyde pump, the formaldehyde flow meter, the ammonia water pump and the ammonia water flow meter are all made of 304 stainless steel.
The utility model provides a preparation equipment of liquid slow release fertilizer, the liquid slow release fertilizer prepared by the equipment is not easy to crystallize at low temperature, and can be suitable for storage and use in northern areas in winter; the fertilizer has quick-acting, medium-acting and long-acting multi-level nutrient supply functions, does not need to be applied in small quantity and for multiple times, so that the labor cost is saved, and the release period of the fertilizer is prolonged without adding components such as urease inhibitor, nitrification inhibitor and the like, so that the requirements on the pH value, the temperature, the humidity and the like of soil are wide; the preparation process flow is simple, the operation is convenient, and the production mode of no dust, no waste gas, no waste water and no waste residue is favorable for environmental protection; the equipment has small floor area, less investment and quick response, and is favorable for large-scale popularization and use.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a preparation device for a liquid slow-release fertilizer provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, directly disposed, installed, connected, or indirectly disposed and connected through intervening components and intervening structures.
In addition, in the embodiments of the present invention, if there are any indications of "long", "short", "out", "in", "out", "high", "low", etc. of orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the conventional placing state or using state, it is only for convenience of description and simplification of description, but does not indicate or imply that the structures, features, devices or elements indicated must have a specific orientation, be constructed in a specific orientation and be operated, and thus should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The various features and embodiments described in the detailed description may be combined in any suitable manner, for example, different embodiments may be formed by combining different features/embodiments, and various combinations of features/embodiments are not separately described in order to avoid unnecessary repetition in the present disclosure.
As shown in figure 1, the embodiment of the utility model provides a preparation equipment of liquid slowly-releasing fertilizer, including formaldehyde storage tank 1, aqueous ammonia storage tank 2, first reation kettle 3, second reation kettle 4, raw materials dosing unit 7, microfilter 10 and first lifting machine 5. First reation kettle 3 can be used to supply the material in raw materials dosing unit 7 to carry to first reation kettle 3. The formaldehyde storage tank 1 can be communicated with the first reaction kettle 3 through a first pipeline 101; the ammonia water storage tank 2 can be communicated with the first reaction kettle 3 through a second pipeline 102; the first hoister 5 can be arranged between the raw material batching device 7 and the first reaction kettle 3, namely, the medium in the raw material batching device 7 is conveyed to the first reaction kettle 3 through the first hoister 5; the first reaction kettle 3 can be communicated with the second reaction kettle 4 through a third pipeline 103; seventh pipe 107 second reaction vessel 4 may be connected to microfilter 10 via fourth pipe 104; the microfilter 10 may be connected to the product tank 13 via a fifth pipe 105, and the microfilter 10 may be used for filtering out impurities in the slurry from the second reaction tank 4. The embodiment of the utility model provides a preparation equipment of liquid slow release fertilizer, its liquid slow release fertilizer who prepares through this equipment is difficult to the crystallization at low temperature, can be adapted to in winter and store, use in northern area; the fertilizer has quick-acting, medium-acting and long-acting multi-level nutrient supply functions, and can achieve the purpose of applying fertilizer once without additional fertilizer or reducing the additional fertilizer frequency, thereby saving the labor cost, and prolonging the release period of the fertilizer without adding components such as urease inhibitor, nitrification inhibitor and the like, thereby having wide requirements on the pH value, the temperature, the humidity and the like of soil; the preparation process flow is simple, the operation is convenient, and the production mode of no dust, no waste gas, no waste water and no waste residue is favorable for environmental protection; the equipment has small floor area, less investment and quick response, and is favorable for large-scale popularization and use.
Optionally, the formaldehyde storage tank 1 may be made of 304 stainless steel or glass steel, the exterior of the formaldehyde storage tank needs to be made of a heat insulating material, the interior of the formaldehyde storage tank may be provided with a heating and heat insulating device, and the temperature of the formaldehyde storage tank is not lower than 15 ℃ when the internal medium is formaldehyde (the heating and heat insulating device is not required to be opened when the internal medium is urea formaldehyde pre-condensed liquid). The heating and heat preservation device can adopt steam, heat conduction oil or water for heating and heat preservation. In addition, the formaldehyde tank 1 may be provided with a liquid level meter.
The first pipeline 101 can be further connected with a formaldehyde pump 11 and a formaldehyde flow meter 12, the formaldehyde pump 11 can control the formaldehyde storage tank 1 to be opened or closed, the formaldehyde flow meter 12 can meter the required medium amount, and the required medium amount flows into the first reaction kettle 3 from the formaldehyde storage tank 1 through the first pipeline 101 after the metering is finished. The formaldehyde pump 11 may be a corrosion-resistant pump, and both the formaldehyde pump 11 and the formaldehyde flow meter 12 may be made of 304 stainless steel.
Optionally, the ammonia water storage tank 2 may be made of 304 stainless steel or glass steel, or carbon steel with an inner rubber lining, and an outer heat insulation material. In addition, the ammonia water tank 2 may be provided with a liquid level meter.
The second pipeline 102 can also be connected with an ammonia water pump 21 and an ammonia water flowmeter 22, the ammonia water pump 21 can control the ammonia water storage tank 2 to be opened or closed, the ammonia water flowmeter 22 can measure the required medium amount, and the required medium amount flows into the first reaction kettle 3 from the ammonia water storage tank 2 after the measurement is finished. Wherein, the ammonia pump 21 can be a corrosion-resistant pump, and both the ammonia pump 21 and the ammonia flowmeter 22 can be made of 304 stainless steel.
Alternatively, the raw material dosing unit 7 may comprise at least one raw material bin, at least one electronic belt scale and a mixing belt conveyor. In the embodiment, 4-6 raw material bins are arranged, and 4-6 electronic belt weighers are arranged corresponding to the raw material bins.
Alternatively, the first reaction vessel 3 and the second reaction vessel 4 may be made of 304 stainless steel or 316L stainless steel, and have a stirring device and a heating and heat-preserving device, wherein the heating and heat-preserving device may use steam, heat-conducting oil or water for heating and heat-preserving, the materials in the reaction vessels are ensured to have corresponding reaction temperature by controlling the heating and heat-preserving device, and the stirring device may enable various materials entering the reaction vessels to be uniformly mixed and ensure normal reaction of the internal materials.
Optionally, the preparation equipment may further include a tap water preheating storage tank 9, and the tap water preheating storage tank 9 may be communicated with the second reaction kettle 4 through a seventh pipeline.
Alternatively, the tap water preheating storage tank 9 may be made of 304 stainless steel, and a stirring device and a heating and heat-preserving device are arranged inside the tank. Wherein, the stirring device is responsible for stirring the water entering the tap water preheating storage tank 9 to ensure that the water is heated uniformly; the heating and heat-insulating device can be heated by adopting steam, heat-conducting oil or water, and the tap water is enabled to preheat the materials in the storage tank 9 by controlling the heating and heat-insulating device so as to ensure the corresponding temperature. In addition, the tap water preheating storage tank 9 may be provided with a liquid level meter.
The seventh pipe 107 may further be connected to a tap water flow meter 91 for measuring the instantaneous flow and the accumulated flow of the hot water entering the second reaction vessel 4. The tap water flow meter 91 may be made of 304 stainless steel.
Alternatively, the tap water preheating tank 9 may be externally connected to the tap water source 15 through an eighth pipe. The source of tap water 15 may be from a utility responsible for supplying water to the facility.
Alternatively, the microfilter 10 may be provided with at least two, and two or more microfilters 10 may be provided in parallel. Of course, only one microfilter 10 may be provided. In this embodiment, two microfilters 10 are provided, one of which can be used as a spare, and the other can be used as an open for cleaning, and the microfilter 10 can be made of 304 stainless steel or other materials.
Alternatively, at least two product tanks 13 may be provided, and two or more product tanks 13 may be provided in parallel. Of course, only one finished tank 13 may be provided. In this embodiment, two finished product storage tanks 13 are provided corresponding to the two micro filters 10, each finished product storage tank 13 is connected to one micro filter 10, and the two finished product storage tanks 13 can be used alternately, so that the temperature of the finished products is reduced to an appropriate temperature for packaging and warehousing.
Optionally, the apparatus may further include a liquid finished product packaging device 14 for packaging and warehousing the liquid slow-release fertilizer, and the finished product storage tank 13 may be communicated with the liquid finished product packaging device 14 through a seventh pipeline. The device can fill bottle-shaped packages with different volumes, can also fill bag-type packages or barrel-shaped packages with larger volumes, and can be arranged according to actual requirements.
Optionally, the apparatus may further include a preheating mixer 8 and a second elevator 6, the preheating mixer 8 may be configured to heat the medium elements, the trace elements, or/and the npk raw material, and the second elevator 6 may be configured to convey the medium elements, the trace elements, or/and the npk raw material in the preheating mixer 8 to the second reaction vessel 4. A mixing belt conveyor (not shown in the figure) can be arranged between the raw material batching device 7 and the preheating mixer 8, namely, the medium elements, the trace elements or/and the nitrogen, phosphorus and potassium raw materials in the raw material batching device 7 are conveyed to the preheating mixer 8 through the mixing belt conveyor. The second lifting machine 6 can be arranged between the preheating mixer 8 and the second reaction kettle 4, namely, the urea-formaldehyde slurry added with the medium elements, the trace elements or/and the nitrogen, phosphorus and potassium raw materials in the preheating mixer 8 is conveyed to the second reaction kettle 4 through the second lifting machine 6.
Alternatively, the pre-heating mixer 8 may be provided with stirring means and heating and heat-insulating means. The stirring device is responsible for uniformly mixing various materials entering the preheating mixer 8 and ensuring uniform preheating of the materials. The medium of the heating and heat-insulating device can be heated by steam, heat-conducting oil or water, and the materials in the preheating mixer 8 are enabled to be at corresponding temperatures by controlling the heating and heat-insulating device.
In order to make the preparation equipment of the liquid slow-release fertilizer provided by the embodiment of the present invention easier to understand, the following embodiment is further described:
the first embodiment is as follows:
the preparation method of the liquid slow-release fertilizer comprises the following specific steps:
s1, opening the formaldehyde pump 11, and enabling the formaldehyde or urea-formaldehyde pre-condensed liquid in the formaldehyde storage tank 1 to flow into the first reaction kettle 3 after being measured by the formaldehyde flow meter 12 according to the proportion of the formaldehyde in the formula for preparing the liquid slow-release fertilizer.
And S2, opening the ammonia water pump 21, and making the ammonia water in the ammonia water storage tank 2 flow into the first reaction kettle 3 after being measured by the ammonia water flowmeter 22 according to the amount of the ammonia water in the formula for preparing the liquid slow release fertilizer.
S3, the first reaction kettle 3 can stir and heat the formaldehyde in the step S1 and the ammonia water in the step S2 through a stirring device and a heating and heat preserving device, so that the mixed liquid of the formaldehyde and the ammonia water is slowly heated to 50-70 ℃ for standby.
S4, opening the first hoister 5, slowly conveying the urea in the raw material batching device 7 to the first reaction kettle 3 by the first hoister 5 according to the proportion of the urea in the formula for preparing the liquid slow-release fertilizer, continuously heating the first reaction kettle 3 in the process, keeping the temperature of the slurry in the first reaction kettle 3 at 60-95 ℃ until the urea is completely dissolved, and continuously heating the slurry at the temperature of 30-90 min to obtain the urea-formaldehyde slurry.
S5, opening the overflow valve of the first reaction kettle 3, making the urea-formaldehyde slurry in the first reaction kettle 3 completely flow into the second reaction kettle 4, and closing the overflow valve of the first reaction kettle 3. (if preparing the liquid slow-release functional fertilizer, the liquid slow-release compound fertilizer or the functional liquid slow-release fertilizer, a process is needed to be added, which comprises the steps of conveying at least one of the medium elements such as calcium, magnesium, zinc, boron and the like and at least one of the nitrogen-phosphorus-potassium raw materials such as potassium dihydrogen phosphate, potassium nitrate, potassium sulfate, industrial-grade monoammonium phosphate and the like in the raw material batching device 7 to the preheating mixer 8 according to the proportion of the medium elements, the trace elements or/and the nitrogen-phosphorus-potassium raw materials in the formula for preparing the liquid slow-release fertilizer, opening the stirring device and the heating and heat-insulating device of the preheating mixer 8 to ensure that the temperature of the medium elements, the trace elements and the nitrogen-phosphorus-potassium raw materials in the preheating mixer 8 reaches 60-95 ℃, then opening the second lifting machine 6, opening the discharge valve of the preheating mixer 8, conveying the medium elements, the trace elements and the nitrogen-phosphorus-potassium raw materials to the second reaction kettle 4 by the second lifting machine 6), the urea-formaldehyde slurry is stirred and heated by the second reaction kettle 4, the temperature of the urea-formaldehyde slurry is kept at 60-95 ℃, the reaction is continued for 30-60 minutes, and in the period, a proper amount of caustic soda is added to adjust the pH value of the urea-formaldehyde slurry to be 7.0-9.5.
An outlet valve of the tap water source 15 and an inlet valve of the tap water preheating storage tank 9 are opened, and the inlet valve of the tap water preheating storage tank 9 is closed when the water level reaches the required height. And opening a stirring device and a heating and heat-preserving device of the tap water preheating storage tank 9 to heat and keep the temperature of the water in the tap water preheating storage tank 9 at 60-95 ℃. And opening the water outlet valve of the tap water preheating storage tank 9, the water inlet valve of the tap water flowmeter 91, the water outlet valve of the tap water flowmeter 91 and the water inlet valve of the second reaction kettle 4 in sequence, after hot water is conveyed to the second reaction kettle 4 according to the proportion, closing the water outlet valve of the tap water flowmeter 91, the water inlet valve of the tap water flowmeter 91 and the water outlet valve of the tap water preheating storage tank 9 in sequence, and finally closing the water inlet valve of the second reaction kettle 4.
S6, opening the feed valves of the microfilter 10 and the finished product tank 13, and then opening the overflow valve of the second reaction vessel 4, so that the urea-formaldehyde slurry (or the urea-formaldehyde slurry added with medium elements, trace elements or/and nitrogen, phosphorus and potassium raw materials) in the second reaction vessel 4 completely flows into the finished product tank 13 after being filtered by the microfilter 10, and the liquid slow-release fertilizer can be prepared.
And S7, after the liquid slow release fertilizer in the step S6 is cooled, enabling the liquid slow release fertilizer to flow into the liquid finished product packaging device 14, and packaging and warehousing the liquid slow release fertilizer by the liquid finished product packaging device 14 to obtain a liquid slow release fertilizer product with a corresponding specification.
The embodiment of the utility model provides a preparation equipment of liquid slow release fertilizer, it contains slow-release urea-formaldehyde nitrogen in the liquid slow release fertilizer who prepares through this equipment, contains ammonium nitrogen and amide nitrogen that do not participate in chemical reaction simultaneously, and ammonium nitrogen can be absorbed the utilization by the crop very fast; the amide nitrogen is decomposed into ammonium nitrogen under the action of urease to be absorbed by crops; the urea-formaldehyde nitrogen needs to be decomposed into amide nitrogen and ammonium nitrogen under the action of microorganisms, and the amide nitrogen is decomposed into ammonium nitrogen again to be absorbed by crops, namely the liquid slow-release fertilizer has quick-acting, medium-acting and long-acting multi-level nutrient supply functions, accords with the fertilizer using rule of the crops in the growth period, has high fertilizer utilization rate and does not fall off the fertilizer, so that the purposes of one-time fertilizer application without additional fertilizer or reduction of additional fertilizer frequency can be achieved, and the labor cost is reduced. The urea-formaldehyde reactant obtained by the on-line chemical reaction of the liquid slow-release fertilizer can effectively reduce the crystallization temperature of the liquid fertilizer, is 5-10 ℃ lower than the crystallization temperature of the common liquid fertilizer, can reach the temperature of minus 15-25 ℃, can not crystallize, and is suitable for all regions in the south of China and most regions in the north. The liquid slow release fertilizer is a clear liquid type liquid fertilizer, has stable product quality, is fully water-soluble and free of impurities, and is suitable for various fertilizing modes such as sprinkling irrigation, dropper, foliage spraying and the like. The device has no dust, waste gas, waste water and waste slag in the preparation process, and belongs to environment-friendly process complete equipment; the process flow is simple, the operation is convenient, and the method is suitable for large-scale industrial production; in addition, the device has compact layout, small floor area, less investment and quick effect, and is beneficial to large-scale popularization and use.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. A preparation device of a liquid slow-release fertilizer is characterized by comprising a formaldehyde storage tank, an ammonia water storage tank, a first reaction kettle, a second reaction kettle, a raw material proportioning device, a microfilter and a first lifter for conveying materials in the raw material proportioning device to the first reaction kettle,
the formaldehyde storage tank through first pipeline communicate in first reation kettle, the aqueous ammonia storage tank through the second pipeline communicate in first reation kettle, first lifting machine set up in raw materials dosing unit with between the first reation kettle, first reation kettle through the third pipeline communicate in the second reation kettle, the second reation kettle through the fourth pipeline communicate in the microfilter, the microfilter communicates in the finished product storage tank through the fifth pipeline.
2. The apparatus for preparing a liquid slow-release fertilizer according to claim 1, further comprising a liquid finished product packaging device for packaging and warehousing the liquid slow-release fertilizer, wherein the finished product storage tank is communicated with the liquid finished product packaging device through a sixth pipeline.
3. The apparatus for preparing liquid slow release fertilizer according to claim 1, further comprising a pre-heating mixer for heating the medium elements, the trace elements or/and the NPK raw materials and a second elevator for conveying the medium elements, the trace elements or/and the NPK raw materials in the pre-heating mixer to the second reaction vessel,
the raw materials dosing unit with preheat and be provided with the compounding belt feeder between the blendor, the second lifting machine set up in preheat the blendor with between the second reation kettle.
4. The preparation equipment of the liquid slow-release fertilizer as claimed in claim 1, further comprising a tap water preheating storage tank, wherein the tap water preheating storage tank is communicated with the second reaction kettle through a seventh pipeline.
5. The preparation equipment of the liquid slow release fertilizer as claimed in claim 1, wherein the first pipeline is further connected with a formaldehyde pump and a formaldehyde flow meter; the second pipeline is also connected with an ammonia water pump and an ammonia water flowmeter.
6. The apparatus for preparing a liquid slow-release fertilizer according to claim 1, wherein at least two microfilters are provided, and each microfilter is provided in parallel; the finished product storage tanks are at least two, and all the finished product storage tanks are arranged in parallel.
7. The apparatus for preparing the liquid slow-release fertilizer as claimed in claim 1, wherein the formaldehyde storage tank, the ammonia water storage tank, the first reaction kettle and the second reaction kettle are all provided with a stirring device and a heating and heat-insulating device.
8. The apparatus for preparing liquid slow-release fertilizer according to claim 1, wherein liquid level meters are arranged in the formaldehyde storage tank and the ammonia water storage tank.
9. The preparation equipment of the liquid slow-release fertilizer as claimed in claim 1, wherein the formaldehyde storage tank and the ammonia water storage tank are made of 304 stainless steel, and the first reaction kettle and the second reaction kettle are made of 304 stainless steel or 316L stainless steel.
10. The apparatus for preparing liquid slow release fertilizer according to claim 5, wherein the formaldehyde pump, the formaldehyde flow meter, the ammonia water pump and the ammonia water flow meter are all made of 304 stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921338986.8U CN211056976U (en) | 2019-08-14 | 2019-08-14 | Preparation equipment of liquid slow-release fertilizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921338986.8U CN211056976U (en) | 2019-08-14 | 2019-08-14 | Preparation equipment of liquid slow-release fertilizer |
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| CN211056976U true CN211056976U (en) | 2020-07-21 |
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| CN201921338986.8U Active CN211056976U (en) | 2019-08-14 | 2019-08-14 | Preparation equipment of liquid slow-release fertilizer |
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