Organic fertilizer applying system

Abstract

The utility model relates to the technical field of organic fertilizer fertilization, and particularly discloses an organic fertilizer fertilization system and a fertilization method, the organic fertilizer fertilization system comprises a differential pressure centrifugal filtering device, the differential pressure centrifugal filtering device comprises a device body, a centrifugal rotating disc is rotatably arranged in the device body, and a plurality of small filtering holes are formed in the middle of the side wall of the centrifugal rotating disc; a refined filtration liquid storage chamber and a slag liquid storage chamber are arranged in the device body; the bottom section cutting surfaces of the refined filtration liquid storage chamber and the slag liquid storage chamber are arranged in a manner that the middle parts are convex; the centrifugal turntable sequentially penetrates through the middle parts of the refined filtration liquid storage chamber and the slag liquid storage chamber; and a feeding pipe is arranged above the centrifugal turntable. The device has the beneficial effects of low energy consumption, high filtering efficiency, capability of meeting the requirement of applying biogas slurry to a drip irrigation system after treatment and the like.

Description

Technical Field

[0001] This utility model relates to the field of organic fertilizer application technology, specifically to an organic fertilizer application system. Background Technology

[0002] Biogas slurry fertilizer is a high-quality organic fertilizer produced by anaerobic fermentation of human and animal excrement, straw, and other organic matter in a biogas digester. It provides comprehensive nutrients to crops, promoting their growth and development, and improving yield and quality. For example, using biogas slurry fertilizer as a top dressing in vegetable cultivation can result in dark green leaves, thick stems, and improved taste and nutritional value. In traditional crop cultivation, the specific method for applying biogas slurry fertilizer is to apply it near the crop roots using trenching or hole application, followed by covering with soil. However, with agricultural technology innovation and development, drip irrigation technology has become widely used in crop cultivation. Initially, drip irrigation was mainly used for crop water supply, that is, according to the crop's water requirements, water and nutrients are dripped evenly and slowly, drop by drop, into the soil around the crop's root zone through a pipeline system and sprinklers installed on capillary tubes. Large farms have adopted drip irrigation systems for fertilization to reduce labor costs, but this currently mainly relies on inorganic fertilizers. The inorganic fertilizer is effectively dissolved in water and then pumped into the drip irrigation lines for application. Untreated biogas slurry fertilizer, due to its high impurity content, has not yet been found to be directly used in drip irrigation systems. The applicant previously attempted to use filter plates for coarse and fine filtration to meet the anti-clogging requirements of drip irrigation systems; however, in actual filtration operations, it was found to be slow, inefficient, and unsuitable for large-scale farm application. Utility Model Content

[0003] To address the above shortcomings, this utility model provides an organic fertilizer application system to meet the anti-clogging requirements of existing drip irrigation systems and reduce the probability of clogging.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An organic fertilizer application system includes a differential pressure centrifugal filtration device. The device comprises a main body with a rotatable centrifugal disc. The centrifugal disc has a wider top and narrower bottom structure, with several small filter holes in the middle of its sidewalls. A drive shaft is located at the lower part of the centrifugal disc, driven by a drive motor. The main body contains a fine filtration storage chamber and a residue-liquid storage chamber. The bottom cross-sections of both the fine filtration storage chamber and the residue-liquid storage chamber are convex in the middle. The centrifugal disc passes sequentially through the middle of both the fine filtration storage chamber and the residue-liquid storage chamber. A feed pipe is located above the centrifugal disc.

[0006] Optionally, the lower part of the feed pipe is rotatably provided with an inlet pipe.

[0007] Optionally, the diameter of the feed pipe is smaller than the diameter of the feed tube.

[0008] Optionally, both the fine filtration storage chamber and the sludge storage chamber are configured as sealed chambers; a first sealed bearing is provided between the centrifugal disc and the bottom of the fine filtration storage chamber; and a second sealed bearing is provided between the centrifugal disc and the bottom of the sludge storage chamber.

[0009] Optionally, the fine filtration storage chamber is connected to a first pressure regulating pipe, and a first air valve is provided on the first pressure regulating pipe; the sludge storage chamber is connected to a second pressure regulating pipe, and a second air valve is provided on the second pressure regulating pipe.

[0010] Optionally, a first drain pipe is provided at the bottom of the fine filtration storage chamber, and a first valve is provided on the first drain pipe; a second drain pipe is provided at the bottom of the sludge storage chamber, and a second valve is provided on the second drain pipe.

[0011] Optionally, the fine filtration storage chamber is connected to a first pressure gauge and a safety valve via a first vent pipe, and an arc-shaped protective cover is provided on the inner end of the first vent pipe; the sludge storage chamber is connected to a second pressure gauge and a safety valve via a second vent pipe, and an arc-shaped protective cover is provided on the inner end of the second vent pipe. Optionally, it also includes a gas-liquid mixing device, which includes a conical body with a spiral hole arranged from top to bottom within the conical body; the top of the spiral hole is connected to the filtrate inlet pipe and an air inlet pipe is arranged along its tangential direction; the lower end of the spiral hole is connected to the mixed gas-liquid conveying pipe.

[0012] Optionally, the helical radius of the helical hole gradually increases from top to bottom.

[0013] Optionally, the diameter of the spiral hole gradually decreases from top to bottom.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model's differential pressure centrifugal filtration device, by combining centrifugal force and differential pressure, can directly perform fine filtration of coarse biogas slurry without dilution, thereby significantly reducing filtration energy consumption. At the same time, the combined effect of centrifugal force and differential pressure not only improves fine filtration efficiency but also allows for the use of finer filter pores to meet the fineness requirements of drip irrigation systems. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the differential pressure centrifugal filtration device of this utility model;

[0018] Figure 2 This is a schematic diagram of the gas-liquid mixing device of this utility model. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "inner", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] An organic fertilizer application system includes a differential pressure centrifugal filtration device, such as... Figure 1As shown, the differential pressure centrifugal filtration device includes a device body 1, within which a centrifugal disc 21 is rotatably mounted. The centrifugal disc 21 has a structure that is wider at the top and narrower at the bottom, and several small filter holes 22 are provided in the middle of its sidewall. During processing, the hole diameter can be set according to requirements; in this embodiment, a hole diameter of less than 1 mm is preferred. A drive shaft 12 is provided at the lower part of the centrifugal disc 21. In this embodiment, the drive shaft 12 is supported by two bearings 11, which are fixed on a support 10. A support foot 14 is provided at the lower part of the support 10. The drive shaft 12 is driven by a drive motor 15. The device body contains a fine filtration liquid storage chamber 9 and a residue liquid storage chamber 5. Both the fine filtration storage chamber 9 and the sludge storage chamber 5 are circular, with their bottom cross-sections featuring a central convex shape. This design aims to encourage liquid flow outwards, preventing the centrifuged liquid from creating resistance to the rotation of the centrifugal disc 21. Specifically, the highest liquid level in both chambers is lower than their central tops. The centrifugal disc 21 passes sequentially through the middle of both chambers 9 and 5. This design allows the centrifugal disc 21 to centrifuge the liquid to be filtered, causing the filtrate to be thrown through the filter holes into the fine filtration storage chamber 9, while larger particles or thicker liquids are thrown from the top of the disc into the sludge storage chamber 5. A feed pipe 23 is located above the centrifugal disc 21. In this embodiment, considering the need for tightness, the lower part of the feed pipe 23 is rotatably equipped with an inlet pipe 13, and the diameter of the inlet pipe 13 is smaller than that of the feed pipe 23. The advantage of this design is that when there is a negative pressure above the centrifugal disc 21, the inlet pipe 13 increases the fluid resistance within the pipe. Furthermore, during use, the inlet pipe 13 is immersed below the liquid surface; its smaller diameter and rotatability improve the stability of the inlet pipe 13 under various operating conditions. Optionally, the air pressure between the fine filtration storage chamber and the sludge storage chamber can be controlled. In this embodiment, both the fine filtration storage chamber 9 and the sludge storage chamber 5 are configured as sealed chambers. A preferred scheme is as follows: a first sealing bearing 24 is provided between the centrifugal disc 21 and the bottom of the fine filtration storage chamber 9; a second sealing bearing 4 is provided between the centrifugal disc 21 and the bottom 6 of the sludge storage chamber 5. In this embodiment, as... Figure 1 As shown, a raised ring 25 is provided in the upper middle part of the centrifugal turntable 21, and the raised ring 25 is rotatably connected to the middle part of the bottom 6 of the sludge storage chamber 5 through the second sealing bearing 4.

[0023] Optionally, the fine filtration storage chamber 9 is connected to a first pressure regulating pipe 8, and a first air valve 7 is provided on the first pressure regulating pipe 8; the sludge storage chamber 5 is connected to a second pressure regulating pipe 2, and a second air valve 3 is provided on the second pressure regulating pipe 2. The purpose of this design is to allow for adjustable use as needed. For example, during operation, the outer end of the first air valve 7 can be connected to a negative pressure pipe, and the working negative pressure value of the fine filtration storage chamber 9 can be controlled through the first air valve 7 to improve the filtration effect. For example, for coarse biogas slurry (i.e., without water dilution), this device can combine centrifugal force and negative pressure to improve the filtration effect. This is also an advantage of this device over existing filtration systems. If the coarse biogas slurry is diluted before filtration, for example, biogas slurry generally needs to be diluted at a ratio of 1:2 to 1:3 for crops, and only diluted at a ratio of 1:2 before filtration, for large farms, the filtration device will increase energy consumption by more than double (the total filtration volume increases by 2 times). Existing filtration devices directly filter coarse biogas slurry, which is prone to clogging in long-term use (because drip irrigation systems require higher liquid fineness, so biogas slurry must pass through a fine sieve). Therefore, this device can significantly reduce energy consumption and meet fineness requirements compared to existing equipment, removing larger particles and viscous substances by centrifugation. The second air valve 3 can play an auxiliary enhancing role, such as introducing positive pressure air to promote airflow from the inside to the outside of the centrifugal disc 21, improving the smoothness of the biogas slurry passing through the filter holes 22 and increasing the centrifugal filtration efficiency. When periodic maintenance is required, the centrifugal disc 21 can be centrifuged and cleaned with clean water. Alternatively, reverse pressure can be used to clear the flow by connecting the outer end of the first air valve 7 to a positive pressure pipe and the outer end of the second air valve 3 to a negative pressure pipe.

[0024] Optionally, a first drain pipe 16 is provided at the bottom of the fine filtration storage chamber 9, and a first valve is provided on the first drain pipe 16; a second drain pipe 18 is provided at the bottom of the sludge storage chamber 5, and a second valve is provided on the second drain pipe.

[0025] Optionally, the fine filtration storage chamber 9 is connected to a first pressure gauge 17 and a safety valve via a first vent pipe, and an arc-shaped protective cover is provided on the inner end of the first vent pipe (to prevent the inner end of the first vent pipe from being blocked due to centrifugal movement of the biogas slurry); the sludge storage chamber 5 is connected to a second pressure gauge 19 and a safety valve via a second vent pipe, and an arc-shaped protective cover 20 is provided on the inner end of the second vent pipe. Optionally, such as Figure 2 As shown, it also includes a gas-liquid mixing device, which includes a conical body 26, with a spiral hole arranged from top to bottom inside the conical body 26; the top 27 of the spiral hole is connected to the filtrate inlet pipe 30 and an air inlet pipe 31 is arranged along its tangential direction; the lower end 28 of the spiral hole is connected to the mixed gas-liquid conveying pipe 29.

[0026] Optionally, the spiral radius of the spiral orifice gradually increases from top to bottom, and the orifice diameter gradually decreases from top to bottom. The advantage of this design is that the diluted filtrate is pumped by electric pump 33 through a pipeline to the filtrate inlet pipe 30, and then positive pressure gas is injected by air pump 32 along the tangential direction of the spiral orifice. The gradually increasing spiral radius from top to bottom increases the gas-liquid mixing contact time, while the gradually decreasing orifice diameter from top to bottom enhances the gas-liquid mixing effect through pressure.

[0027] When using this system, please follow these steps:

[0028] S1: Coarse filtration: The biogas slurry is coarsely filtered using a coarse filter screen (preferably 10-20 mesh) to obtain coarse filtered biogas slurry; S2: Differential pressure fine filtration: The coarse filtered biogas slurry is transported to a differential pressure centrifugal filtration device through a feed pipe. The fine filtration storage chamber is controlled by negative pressure. The coarse filtered biogas slurry is centrifuged by a centrifugal disc and the negative pressure of the fine filtration storage chamber is synchronized to achieve differential pressure centrifugal separation of the coarse filtered biogas slurry to obtain fine filtered biogas slurry;

[0029] S3: Dilution, dilute the finely filtered biogas slurry with water (for example, dilute it according to the ratio of finely filtered biogas slurry to water of 1:2 or 1:3) to obtain finely diluted biogas slurry;

[0030] S4: The finely filtered and diluted biogas slurry is fed into the gas-liquid mixing device through the filtrate inlet pipe. Simultaneously, positive pressure gas is introduced into the gas-liquid mixing device through the air inlet pipe, causing the finely filtered and diluted biogas slurry to mix with the gas, resulting in a gas-liquid mixed biogas slurry. The gas-liquid mixed biogas slurry is then pumped into the liquid delivery pipeline of the drip irrigation system for fertilization of crops. This is one of the core technical points of this application. Through application, it has been found that after the positive pressure gas is fully mixed with the finely filtered and diluted biogas slurry, the clogging of the drip irrigation system can be significantly reduced. This is because during the transmission of the gas-liquid mixture in the pipeline of the drip irrigation system, the gas in the gas-liquid mixture has a good agitation effect on the biogas slurry, reducing the sedimentation of the diluted biogas slurry during the transportation process. At the dripper, the positive pressure gas escapes in the form of bubbles, which has a continuous unclogging effect on the dripper, significantly reducing the clogging of the dripper.

Claims

1. An organic fertilizer application system characterized by: The application relates to a differential pressure centrifugal filtering device, which comprises a device body, a centrifugal rotating disc rotatably arranged in the device body, the centrifugal rotating disc being in a structure of being wide at the top and narrow at the bottom, a plurality of filtering holes being arranged in the middle part of the side wall of the centrifugal rotating disc, a driving rotating shaft being arranged at the lower part of the centrifugal rotating disc, the driving rotating shaft being driven by a driving motor, a fine filtering liquid storage chamber and a residue liquid storage chamber being arranged in the device body, the bottom section of the fine filtering liquid storage chamber and the residue liquid storage chamber being in a structure of being convex in the middle part, the centrifugal rotating disc penetrating the middle part of the fine filtering liquid storage chamber and the residue liquid storage chamber in sequence, a feeding pipe being arranged above the centrifugal rotating disc.

2. An organic fertilizer application system according to claim 1, characterized in that: The lower part of the feeding pipe is rotatably provided with an inlet pipe.

3. An organic fertilizer application system according to claim 2, characterized in that: The diameter of the inlet pipe is smaller than that of the feeding pipe.

4. An organic fertilizer application system according to claim 1, characterized in that: The fine filtering liquid storage chamber and the residue liquid storage chamber are arranged in a sealed chamber structure, a first sealing bearing is arranged between the centrifugal rotating disc and the bottom of the fine filtering liquid storage chamber, and a second sealing bearing is arranged between the centrifugal rotating disc and the bottom of the residue liquid storage chamber.

5. An organic fertilizer application system according to claim 1, characterized in that: The fine filtering liquid storage chamber is connected with a first air pressure adjusting pipe, and the first air pressure adjusting pipe is provided with a first air valve; the residue liquid storage chamber is connected with a second air pressure adjusting pipe, and the second air pressure adjusting pipe is provided with a second air valve.

6. An organic fertilizer application system according to claim 1, characterized in that: The bottom of the fine filtering liquid storage chamber is provided with a first liquid discharge pipe, and the first liquid discharge pipe is provided with a first valve; the bottom of the residue liquid storage chamber is provided with a second liquid discharge pipe, and the second liquid discharge pipe is provided with a second valve.

7. An organic fertilizer application system according to claim 1, characterized in that: The fine filtering liquid storage chamber is connected with a first air pressure gauge and a safety air valve through a first air pipe, and the inner side end of the first air pipe is provided with an arc-shaped protective cover; the residue liquid storage chamber is connected with a second air pressure gauge and a safety air valve through a second air pipe, and the inner side end of the second air pipe is provided with an arc-shaped protective cover.

8. An organic fertilizer application system according to claim 1, characterized in that: The application further relates to a gas-liquid mixing device, which comprises a conical body, a spiral hole being arranged in the conical body from top to bottom, the top of the spiral hole being connected with a filtered liquid inlet pipe and being provided with an air inlet pipe along the tangential direction of the filtered liquid inlet pipe, and the lower end of the spiral hole being connected with a mixed gas-liquid conveying pipe.

9. An organic fertilizer application system according to claim 8, characterized in that: The spiral radius of the spiral hole gradually increases from top to bottom.

10. An organic fertilizer application system according to claim 8, characterized in that: The hole diameter of the spiral hole gradually decreases from top to bottom.

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