Organic fertilizer desalination system and organic fertilizer desalination method

Abstract

The invention discloses an organic fertilizer desalination system and an organic fertilizer desalination method, wherein the organic fertilizer desalination system comprises a leaching system, an evaporation system and a reflux system; the leaching system comprises a salinity adjustment tank, a filtering mechanism and an online salinity detection system; the salinity adjustment tank comprises a tank body, a central screw, a screw sleeve and a driver; the central screw is rotatably connected in the tank body along the central axis of the tank body, and the upper end of the central screw is rotatably connected to the top wall of the tank body; the driver is fixedly connected to the outer side of the top wall of the tank body, the upper end of the central screw extends from the top wall of the tank body and is transmission-connected to the driver; the screw sleeve is arranged on the central screw by a threaded sleeve, the inner surface of the tank body is provided with a longitudinally extending limit strip, the side of the screw sleeve is provided with a longitudinal limit port adapted to the limit strip, and the central screw is driven to rotate by the driver. The invention reduces the salt content in the organic fertilizer and reduces the production cost of the organic fertilizer.

Description

Technical Field

[0001] The invention relates to the technical field of organic fertilizers, and in particular to an organic fertilizer desalination system and an organic fertilizer desalination method. Background Art

[0002] Organic fertilizer is an important material for improving soil fertility in agricultural production. It is mainly divided into plant-based organic fertilizer and animal-based organic fertilizer. The processing raw materials of plant-based organic fertilizer are usually wastes such as plant straw, and animal-based organic fertilizer is usually livestock and poultry manure, and can also be urban organic garbage and waste. Unlike plant-based organic fertilizer, animal-based organic fertilizer usually has a higher salt content due to the large amount of salt ingested during the animal breeding stage, usually containing 5kg-20kg per ton of organic fertilizer. The salt in animal-based organic fertilizer will limit its use, resulting in seedling burn when large amounts of organic fertilizer are applied. At the same time, long-term application of organic fertilizer will cause salt to accumulate in the soil, resulting in land salinization and inhibiting crop growth.

[0003] To address the above problems, the existing treatment method is to reduce the salt content in organic fertilizers by leaching and desalination. However, the leaching and desalination method consumes a lot of water and produces a large amount of sewage. The treatment cost of sewage is high, which leads to high production costs of organic fertilizers. Summary of the invention

[0004] In view of the defects in the prior art, the salt content in organic fertilizers is reduced, and at the same time, the production cost of organic fertilizers is reduced. The present invention provides an organic fertilizer desalination system; it includes a leaching system, an evaporation system and a reflux system; the leaching system includes a salinity adjustment tank, a filtering mechanism and an online salinity detection system; the salinity adjustment tank includes a tank body, a central screw, a screw sleeve and a driver; the central screw is rotatably connected to the tank body along the central axis of the tank body, and the upper end of the central screw is rotatably connected to the top wall of the tank body; the driver is fixedly connected to the outer side of the top wall of the tank body, the upper end of the central screw extends from the top wall of the tank body and is transmission-connected to the driver; the screw sleeve is threadedly sleeved on the central screw, the inner surface of the tank body is provided with a longitudinally extending limit strip, the side of the screw sleeve is provided with a longitudinal limit opening adapted to the limit strip, the central screw is driven to rotate by the driver, and the longitudinal limit opening of the screw sleeve is sealed and slid along the limit strip on the inner wall of the tank body; the upper part of the tank body is provided with a A feed pipe and a discharge port are provided on the bottom wall of the tank body, and the filtering mechanism is installed at the discharge port for filtering and discharging materials; the online salinity detection system includes a salinity detection probe and a water supply nozzle, and the salinity detection probe and the water supply nozzle are both inserted into the tank body from the outside of the tank body; the evaporation system includes an evaporation pool and a light-transmitting arch shed; the light-transmitting arch shed covers the top of the evaporation pool, and the lower side of the light-transmitting arch shed is fixed to the pool edge of the evaporation pool, so that the light-transmitting arch shed seals the evaporation pool; the pool edge is provided with a confluence trough located on the inner side of the lower side of the light-transmitting arch shed, and the discharge port is connected to the evaporation pool, and the water in the brine in the evaporation pool is evaporated and condensed on the inner surface of the light-transmitting arch shed, so that the salt in the brine is retained in the evaporation pool and the condensed water flows into the confluence trough along the inner surface of the light-transmitting arch shed; the water in the confluence trough is connected to the water supply nozzle through the reflux system.

[0005] The beneficial effects of this device are:

[0006] 1. The leaching system mainly uses water to repeatedly rinse and stir the organic fertilizer evenly. An online salinity detection system is set up in the tank to monitor the salt content of the current salt water in real time. Due to the even stirring, the salt content of the salt water is approximately equal to the salt content of the organic fertilizer. After multiple rinses, stirring, and filtration, the salt content of the organic fertilizer is finally reduced to a qualified level, thus solving the problem of excessive salt content in the organic fertilizer.

[0007] 2. The evaporation pool uses evaporation to evaporate the water in the salt water produced by the leaching system. Especially in areas with sufficient sunlight, the temperature rises rapidly by using solar energy, which is conducive to improving the evaporation effect. The water vapor encounters the inner surface of the arch shed and condenses into liquid. After a large amount of water vapor condenses, it flows down the arch shed to the water collection tank, and finally passes through the reflux system to the leaching system, thus realizing the repeated use of salt-free water. The evaporation pool can also collect salt products as by-products, which not only saves a lot of water, but also increases the salt by-products, thereby reducing the production cost of organic fertilizers.

[0008] Preferably, two limit strips are provided, and the two limit strips are relatively distributed on the inner surface of the tank body; the side of the screw sleeve is provided with longitudinal limit openings corresponding to the two limit strips. Multiple salinity detection probes and water supply nozzles are provided respectively, and all salinity detection probes are embedded in the upper, middle and lower parts of the same limit strip. All water supply nozzles are divided into two rows, and the two rows of water supply nozzles are embedded in the two limit strips one by one, and all salinity detection probes and all water supply nozzles are exposed inside the tank body. The salinity detection probe takes the salinity values ​​of the three places in the tank body, namely the upper, middle and lower parts, and obtains an average salinity value through calculation, so that the detection data of the online salinity detection system is more accurate. The two rows of water supply nozzles replenish water from multiple places, and mixing is easier.

[0009] Preferably, the side of the central screw is provided with a plurality of longitudinal grooves with staggered distribution, each longitudinal groove is provided with a magnetic stirring rod, the upper end of each stirring rod is hinged to the upper part of the corresponding longitudinal groove, and the hinge shaft of the stirring rod is provided with a torsion spring; the lower part of each longitudinal groove is provided with an electromagnet, and the electromagnet loses power, so that the stirring rod swings to the horizontal under the elastic force of the torsion spring. The central screw has two functions, one is to provide a moving path for the screw sleeve, squeeze the organic fertilizer, and quickly discharge the salt water. The second is to provide a connecting structure and rotational power for the stirring rod, and the connecting structure of the stirring rod affects the movement of the screw sleeve, and the two do not affect each other. The stirring function and the extrusion function are combined into one structure, avoiding a complex structure.

[0010] Preferably, the thickness of the stirring rod is not greater than the depth of the longitudinal groove, and the lower end of each stirring rod is provided with a downward inclined surface, and the inclined surface faces the side of the central screw rod. When the screw rod sleeve moves upward through the longitudinal groove, the corresponding stirring rod shall not be raised to avoid the conflict between the two. Therefore, the inclined surface at the lower end of the stirring rod and the depth dimension of the longitudinal groove are designed to ensure that the two do not affect each other.

[0011] Preferably, the filtering mechanism comprises a filter frame, a sealing gate, a first telescopic motor and a second telescopic motor; the sides of the tank body are respectively provided with sockets adapted to the filter frame and the sealing gate, and both sockets are horizontally passed through the discharge port; the cylinder seat of the first telescopic motor and the cylinder seat of the second telescopic motor are both fixedly connected to the side of the tank body, and the telescopic rod of the first telescopic motor is fixedly connected to the filter frame, and the telescopic rod of the second telescopic motor is fixedly connected to the sealing gate, and the first telescopic motor is telescopic to drive the filter frame to extend into or be pulled out from the corresponding socket, and the second telescopic motor is telescopic to drive the sealing gate to extend into or be pulled out from the corresponding socket. The function of the sealing gate is to keep the water in the tank from leaking during the stirring process, and the function of the filter frame is to filter out the salt water, so that the organic fertilizer is retained in the tank body and is subjected to the next step of dilution or the final squeezing and drying process.

[0012] Preferably, a sealing ring is provided between the filter frame and the corresponding socket and between the sealing gate and the corresponding socket, and the length of the sealing ring corresponding to the filter frame is not less than the side length of the filter frame. Since there is a risk of water leakage during the extraction of the filter frame, the length of the sealing ring is extended, and a seal is formed between the frame of the filter frame and the sealing ring during the extraction process to form a waterproof structure, thereby solving the problem of water leakage during the extraction of the filter frame.

[0013] Preferably, the reflux system includes a water storage tank arranged directly below the evaporation tank and a water replenishment tank placed next to the evaporation tank, the confluence trough extends to the water storage tank, the water storage tank is connected to the water replenishment tank through a first pumped pipe, each water supply nozzle extends out of the tank body through a valved joint, and the water replenishment tank is connected to all valved joints through a second pumped pipe.

[0014] Preferably, the top and side of the light-transmitting arch shed are respectively provided with an air inlet pipe and an air outlet pipe located outside the light-transmitting arch shed, a gas deodorizer is provided between the air inlet pipe and the air outlet pipe, and a moisture filter pad is provided at the air inlet of the air inlet pipe. Since the salt water contains other substances in addition to salt, various gases will be generated during the evaporation process, which will increase the air pressure in the shed and make the odor strong. The odor deodorizer is used to remove the odor. In addition, the odor deodorizer uses a balanced air pressure valve to balance the air pressure in the shed. The moisture filter pad can prevent most of the water vapor from entering the gas deodorizer and will not affect the condensation of water vapor.

[0015] The present invention also provides an organic fertilizer desalination method, which is applied to the above-mentioned organic fertilizer desalination system, and the steps are as follows:

[0016] S1. The driver drives the central screw to reverse, so that the screw sleeve moves up to the top of the tank body, and the filter frame and the sealing gate are inserted into the corresponding sockets;

[0017] S2, the crushed organic fertilizer raw material is added into the tank through the feed pipe, and salt-free water is added;

[0018] S3, all electromagnets lose power, and all stirring rods swing upward from a vertical state to a horizontal state under the elastic force of the corresponding torsion springs;

[0019] S4, the driver drives the central screw rod to reciprocate forward and reverse, so that the stirring rod mixes the organic fertilizer raw materials and the salt-free water to form salt-containing water, and the salinity detection probe detects the salt content in the salt-containing water;

[0020] S5. If the real-time salt content value detected by the salinity detection probe is higher than the set salt content value, the second telescopic motor drives the sealing gate to be partially or completely withdrawn from the corresponding socket, the driver drives the central screw to rotate forward, the screw sleeve moves downward and squeezes the organic fertilizer raw material on the filter frame, squeezes out most of the salt water in the organic fertilizer raw material, and the excess salt water is discharged to the evaporation pool;

[0021] During the process of the screw sleeve in S6 and S5 moving down along the central screw, the stirring rod is squeezed by the screw sleeve to swing downward to the corresponding longitudinal groove, and the electromagnet in the longitudinal groove is energized to attract the stirring rod, the driver drives the central screw to reverse and make the screw sleeve slide up and reset, and the second telescopic motor drives the sealing gate to insert into the corresponding socket;

[0022] S7, the water in the salt water evaporates and condenses on the inner surface of the light-transmitting arch shed, the condensed water flows into the water storage tank through the confluence trough and forms salt-free water, and the salt-free water flows back to the tank through the first pump pipeline, the water replenishment tank and the second pump pipeline;

[0023] S8, repeat S3-S7 until the real-time salt content value detected by the salinity detection probe is less than or equal to the set salt content value;

[0024] S9, the second telescopic motor drives the sealing gate to be completely withdrawn from the corresponding socket, the driver drives the central screw to rotate forward, the screw sleeve squeezes and filters out most of the salt water in the organic fertilizer raw material, the driver drives the central screw to reverse, and the screw sleeve resets;

[0025] S10; the first telescopic motor drives the filter frame to be completely pulled out from the corresponding socket, and the squeezed organic fertilizer raw material is discharged from the discharge port, and the desalination is completed.

[0026] The beneficial effect of the method is that it adopts a brand-new organic fertilizer desalination treatment method to achieve zero sewage discharge, and simultaneously produces desalted organic fertilizer and soluble salt products, and the soluble salt products can be subsequently processed to produce value-added products. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0028] Figure 1 It is a structural schematic diagram of the organic fertilizer desalination system in Example 1;

[0029] Figure 2 for Figure 1 A partial enlarged view of the medium salinity adjustment tank;

[0030] Figure 3 for Figure 2 Schematic diagram showing that all stirring rods are in a horizontal state.

[0031] In the accompanying drawings, there are a tank body 1, a central screw 2, a screw sleeve 3, a driver 4, a feed pipe 5, a discharge port 6, a bearing seat assembly 7, a driving pulley 8, a driven pulley 9, a limit strip 10, a longitudinal limit port 11, a longitudinal groove 12, a stirring rod 13, a torsion spring 14, an electromagnet 15, a slope 16, a salinity detection probe 17, a water supply nozzle 18, a filter frame 19, a sealing gate 20, a first telescopic motor 21, a second telescopic motor 22, a socket 23, a sealing ring 24, an evaporation tank 25, a light-transmitting arch shed 26, a confluence trough 27, a water reservoir 28, a water replenishment tank 29, a valved joint 30, a first pump pipe 31, a second pump pipe 32, an air inlet pipe 33, an air outlet pipe 34, a gas deodorizer 35, and a moisture filter pad 36. DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0033] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0034] Embodiment 1:

[0035] like Figure 1 As shown, the first embodiment provides an organic fertilizer desalination system, including a leaching system, an evaporation system and a reflux system, wherein the leaching system includes a salinity adjustment tank, a filtering mechanism and an online salinity detection system, and the salinity adjustment tank includes a tank body 1, a central screw 2, a screw sleeve 3 and a driver 4. A feed pipe 5 is provided at the upper part of the tank body 1, and a discharge port 6 is provided at the bottom wall of the tank body 1. The crushed organic fertilizer is added into the tank body 1 from the feed pipe 5, and the discharge port 6 can filter water and discharge the organic fertilizer after the salinity is adjusted.

[0036] The center screw 2 is rotatably connected to the tank body 1 along the central axis of the tank body 1, and the upper end of the center screw 2 is rotatably connected to the top wall of the tank body 1. Specifically, a bearing seat assembly 7 is provided at the upper end of the tank body 1, and the upper end of the center screw 2 passes through the bearing seat assembly 7, so that the center screw 2 and the tank body 1 form a rotational connection relationship. The driver 4 is fixedly connected to the outer side of the top wall of the tank body 1, and the upper end of the center screw 2 extends from the top wall of the tank body 1 and is transmission-connected to the driver 4. The output shaft of the driver 4 is provided with a driving pulley 8, and the upper end of the center screw 2 is provided with a driven pulley 9, and the driving pulley 8 and the driven pulley 9 are connected by belt transmission. In order to avoid excessive rotation speed of the center screw 2, the ratio of the driving pulley 8 to the driven pulley 9 should not be greater than 1:15.

[0037] like Figure 2 As shown, the screw sleeve 3 is sleeved on the central screw 2 through a thread, and the inner surface of the tank body 1 is provided with a longitudinally extending limit strip 10, and the side of the screw sleeve 3 is provided with a longitudinal limit opening 11 adapted to the limit strip 10. The central screw 2 is driven to rotate by the driver 4, so that the longitudinal limit opening 11 of the screw sleeve 3 slides along the limit strip 10 on the inner wall of the tank body 1 in a sealed manner. The screw sleeve 3 forms a sliding seal with the inner surface of the tank body 1, and the screw sleeve 3 converts the rotation of the central screw 2 into an up-and-down linear motion, and there are two limit strips 10, which are relatively distributed on the inner surface of the tank body 1; the side of the screw sleeve 3 is provided with a longitudinal limit opening 11 corresponding to the two limit strips 10, and there are two groups of limit strips 10 and longitudinal limit openings 11, so that the screw sleeve 3 is subjected to force balance in the up-and-down linear motion.

[0038] like Figure 2 and Figure 3As shown, in order to fully mix the organic fertilizer and water in the tank body 1, a plurality of longitudinal grooves 12 with staggered distribution are provided on the side of the central screw rod 2, and a magnetic stirring rod 13 is provided in each longitudinal groove 12, and the upper end of each stirring rod 13 is hinged to the upper part of the corresponding longitudinal groove 12, and the hinge shaft of the stirring rod 13 is provided with a torsion spring 14, and the elastic force of the torsion spring 14 can keep the stirring rod 13 in a horizontal state. The lower part of each longitudinal groove 12 is provided with an electromagnet 15, and the electromagnet 15 loses power, so that the stirring rod 13 is swung to the horizontal under the elastic force of the torsion spring 14. On the contrary, the electromagnet 15 is energized to keep the stirring rod 13 in the corresponding longitudinal groove 12, and the torsion spring 14 stores energy. The central screw rod 2 has two functions, one is to provide a moving path for the screw rod sleeve 3, squeeze the organic fertilizer, and quickly discharge the salt water. Second, a connection structure and a rotational power are provided for the stirring rod 13, and the connection structure of the stirring rod 13 affects the movement of the screw sleeve 3, and the two do not affect each other. The stirring function and the extrusion function are structurally combined into one, avoiding a complex structure. In addition, the thickness of the stirring rod 13 is not greater than the depth of the longitudinal groove 12, and the lower end of each stirring rod 13 is provided with a downward inclined surface 16, and the inclined surface 16 faces the side of the central screw 2. When the screw sleeve 3 moves upward through the longitudinal groove 12, the corresponding stirring rod 13 shall not be raised to avoid the conflict between the two. Therefore, the lower end inclined surface 16 of the stirring rod 13 and the depth dimension design of the longitudinal groove 12 are adopted to ensure that the two do not affect each other.

[0039] The online salinity detection system in this embodiment includes a salinity detection probe 17 and a water supply nozzle 18, both of which penetrate into the tank body 1 from the outside of the tank body 1. Specifically, there are three salinity detection probes 17 and six water supply nozzles 18, and the three salinity detection probes 17 are all embedded in the upper, middle and lower parts of the same limit strip 10. The six water supply nozzles 18 are divided into two rows, and the two rows of water supply nozzles 18 are embedded in the two limit strips 10 one by one, and all the salinity detection probes 17 and all the water supply nozzles 18 are exposed in the tank body 1. The salinity detection probe 17 takes the salinity values ​​of the three places in the tank body 1, namely the upper, middle and lower places, and obtains an average salinity value through calculation, so that the detection data of the online salinity detection system is more accurate. The two rows of water supply nozzles 18 replenish water from multiple places, and mixing is easier. The salinity detection probe 17 and the water supply nozzle 18 are both embedded in order to avoid the salinity detection probe 17 and the water supply nozzle 18 from touching the screw sleeve 3. Of course, since the salinity detection probe 17 and the water supply nozzle 18 are embedded in the corresponding limit strips 10, there are gaps in the embedded places. When the screw sleeve 3 moves downward, a very small amount of water overflows from these gaps, but it does not affect the normal operation of the entire device.

[0040] The filter mechanism in this embodiment is installed at the discharge port 6 for filtering and discharging materials. The specific structure of the filter mechanism is: the filter mechanism includes a filter frame 19, a sealing gate 20, a first telescopic motor 21 and a second telescopic motor 22. The side of the tank body 1 is provided with sockets 23 adapted to the filter frame 19 and the sealing gate 20, and the two sockets 23 both penetrate the discharge port 6 horizontally. The cylinder seat of the first telescopic motor 21 and the cylinder seat of the second telescopic motor 22 are both fixedly connected to the side of the tank body 1, and the telescopic rod of the first telescopic motor 21 is fixedly connected to the filter frame 19, and the telescopic rod of the second telescopic motor 22 is fixedly connected to the sealing gate 20. The first telescopic motor 21 is telescopic to drive the filter frame 19 to extend into or be pulled out from the corresponding socket 23, and the second telescopic motor 22 is telescopic to drive the sealing gate 20 to extend into or be pulled out from the corresponding socket 23. The function of the sealing gate 20 is to keep the water in the tank from leaking during the stirring process, and the function of the filter frame 19 is to filter out the salt water so that the organic fertilizer is retained in the tank body 1 and undergoes the next step of dilution or the final squeezing and drying process. Furthermore, a sealing ring 24 is provided between the filter frame 19 and the corresponding socket 23 and between the sealing gate 20 and the corresponding socket 23, and the length of the sealing ring 24 corresponding to the filter frame 19 is not less than the side length of the filter frame 19. Since there is a risk of water leakage during the extraction process of the filter frame 19, the length of the sealing ring 24 is extended, and a seal is formed between the frame of the filter frame 19 and the sealing ring 24 during the extraction process to form a waterproof structure, thereby solving the problem of water leakage during the extraction process of the filter frame 19.

[0041] The salinity adjustment tank in this embodiment can achieve the stirring and squeezing of organic fertilizer. The filter frame 19 and the sealing gate 20 of the filter mechanism can be used to discharge the salt water, and then add the salt-free water, and then mix and stir, and the salt water is discharged again, and the cycle continues, that is, the salt content in the organic fertilizer is reduced by dilution until the content does not exceed the set range. A large amount of salt water is generated after dilution in the salinity adjustment tank. In order to achieve water circulation, an evaporation system and a reflux system are used in this embodiment to solve this problem, wherein the specific structure of the evaporation system is as follows:

[0042] like Figure 1As shown, the evaporation system includes an evaporation pool 25 and a light-transmitting arch 26. The light-transmitting arch 26 covers the top of the evaporation pool 25, and the bottom of the light-transmitting arch 26 is fixed to the pool edge of the evaporation pool 25, so that the light-transmitting arch 26 seals the evaporation pool 25; the pool edge is provided with a confluence trough 27 located on the inner side of the bottom of the light-transmitting arch 26, and the discharge port 6 is connected to the evaporation pool 25 through a downwardly inclined inclined pipe. The reflux system includes a water reservoir 28 arranged directly below the evaporation pool 25 and a water replenishment pool 29 placed next to the evaporation pool 25. The confluence trough 27 extends to the water reservoir 28, and the water reservoir 28 is connected to the water replenishment pool 29 through a first pumped pipeline 31. Each water supply nozzle 18 extends out of the tank body 1 through a valved joint 30, and the water replenishment pool 29 is connected to all valved joints 30 through a second pumped pipeline 32. By evaporating the water in the salt water in the evaporation pool 25 and condensing it on the inner surface of the light-transmitting arch 26, the salt in the salt water is retained in the evaporation pool 25 and the condensed water flows along the inner surface of the light-transmitting arch 26 and the confluence trough 27, and finally flows into the water reservoir 28. The water in the water reservoir 28 is pumped into the water replenishment pool 29 through the first pump pipeline 31. The water replenishment pool 29 is also provided with an external water supply pipe to avoid water shortage in the water replenishment pool 29. Tap water can be added through the external water supply pipe. After each filtration, the second pump pipeline 32 sprays the water in the water replenishment pool 29 into the tank body 1 through the water supply nozzle 18 to realize water circulation.

[0043] In addition, an air inlet pipe 33 and an air outlet pipe 34 located outside the light-transmitting arch shed 26 are respectively provided at the top and side of the light-transmitting arch shed 26, a gas deodorizer 35 is provided between the air inlet pipe 33 and the air outlet pipe 34, and a moisture filter pad 36 is provided at the air inlet of the air inlet pipe 33. Since the salt water contains other substances in addition to salt, various gases will be generated during the evaporation process, which increases the air pressure in the shed and makes the odor strong. An odor deodorizer is used to remove the odor. The specific type of the gas deodorizer 35 can be formulated accordingly according to the generated gas, and this embodiment does not limit it. In addition, the odor deodorizer uses a balanced air pressure valve to balance the air pressure in the shed. The moisture filter pad 36 can prevent most of the water vapor from entering the gas deodorizer 35 without affecting the condensation of water vapor.

[0044] Embodiment 2:

[0045] Embodiment 2 provides an organic fertilizer desalination method, based on the organic fertilizer desalination system of embodiment 1. The reference numerals in embodiment 2 are the same as those in embodiment 1. This embodiment includes an industrial computer, a driver 4 using a motor, the driver 4, all salinity detection probes 17, all solenoid valves with valve connectors 30, all electromagnets 15, a first water pump with a pump pipeline 31, a second water pump with a pump pipeline 32, a first telescopic motor 21, a second telescopic motor 22 and a gas deodorizer 35 are electrically connected, and the following desalination operations are automatically completed by the setting program of the industrial computer:

[0046] Initial state: the industrial computer drives the driver 4 to drive the central screw 2 to reverse, so that the screw sleeve 3 moves up to the top of the tank body 1. The first telescopic motor 21 drives the filter frame 19 to be inserted into the corresponding socket 23, and the second telescopic motor 22 drives the sealing gate 20 to be inserted into the corresponding socket 23. All electromagnets 15 are energized, and all stirring rods 13 are stored in the corresponding longitudinal grooves 12.

[0047] The crushed organic fertilizer raw material is added into the tank body 1 through the feed pipe 5. For the first desalination, a certain amount of salt-free water needs to be added from the feed pipe 5. The industrial computer makes all the electromagnets 15 lose power, and all the stirring rods 13 swing upward from the vertical state to the horizontal state under the elastic force of the corresponding torsion springs 14. Then, the driver 4 drives the central screw 2 to reciprocate forward and reverse, for example, rotate forward 10 times, and then rotate backward 10 times, and reciprocate forward and reverse in this way, so that the stirring rod 13 mixes the organic fertilizer raw material and the salt-free water to form salt water, and the salinity detection probe 17 detects the salt content in the salt water, and feeds back the real-time salt content value to the industrial computer.

[0048] After data comparison and processing by the industrial computer, if the real-time salt content value detected by the salinity detection probe 17 is higher than the set salt content value, the industrial computer causes the second telescopic motor 22 to drive the sealing gate 20 to be partially or completely withdrawn from the corresponding socket 23, and the driver 4 drives the central screw 2 to rotate forward, and the screw sleeve 3 moves down and squeezes the organic fertilizer raw material on the filter frame 19, squeezing out most of the salt water in the organic fertilizer raw material, and the excess salt water is discharged to the evaporation pool 25. Since all the stirring rods 13 are hinged in the corresponding longitudinal grooves 12 through the hinge shaft, when the screw sleeve 3 moves down along the central screw 2, the stirring rod 13 is squeezed by the screw sleeve 3 and swings downward to the corresponding longitudinal groove 12, and the electromagnet 15 in the longitudinal groove 12 is energized to absorb the stirring rod 13, so that the stirring rod 13 does not protrude from the outer surface of the central screw 2. During the process that the driver 4 drives the central screw 2 to reverse and slide the screw sleeve 3 upward to reset, the stirring rod 13 does not conflict with the central screw 2. Finally, the second telescopic motor 22 drives the sealing gate plate 20 to be inserted into the corresponding socket 23.

[0049] However, if the real-time salt content value detected by the salinity detection probe 17 is not higher than the set salt content value, the industrial computer will also cause the second telescopic motor 22 to drive the sealing gate 20 to be completely withdrawn from the corresponding socket 23, and will also cause the screw sleeve 3 to move down and squeeze the organic fertilizer. However, the difference is that after the organic fertilizer is squeezed until there is no water dripping, the screw sleeve 3 moves up and resets, and the industrial computer then causes the first telescopic motor 21 to drive the filter frame 19 to be withdrawn, and the squeezed organic fertilizer is discharged from the discharge port 6, and desalination is completed.

[0050] In the actual treatment process, most organic fertilizers need to be diluted more than twice to make the salt content meet the standard, but at the same time, water should be saved. Therefore, the water in the salt water is evaporated and condensed on the inner surface of the light-transmitting arch shed 26. The condensed water flows into the reservoir 28 through the confluence trough 27 and forms a salt-free water. The salt-free water then flows back to the tank body 1 through the first pump pipeline 31, the water replenishment tank 29 and the second pump pipeline 32. During this period, the industrial computer supplies pressure through the water pump of the second pump pipeline 32, and one or more solenoid valves with valve connectors 30 are opened to press the salt-free water into the tank body 1.

[0051] Repeat the above dilution and salt water treatment operations until the real-time salt content value detected by the salinity detection probe 17 is less than or equal to the set salt content value, the industrial computer drives the second telescopic motor 22 to drive the sealing gate 20 to be completely withdrawn from the corresponding socket 23, the driver 4 drives the central screw 2 to rotate forward, the screw sleeve 3 squeezes and filters out most of the salt water in the organic fertilizer raw material, the driver 4 drives the central screw 2 to reverse, and the screw sleeve 3 is reset. Finally, the first telescopic motor 21 drives the filter frame 19 to be completely withdrawn from the corresponding socket 23, and the squeezed organic fertilizer raw material is discharged from the discharge port 6, and the desalination is completed.

[0052] Compared with the existing elution desalination method, the organic fertilizer desalination method of this embodiment can recycle salt water, which not only reduces the water consumption, but also obtains soluble salt byproducts, thereby reducing the production cost of organic fertilizer.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An organic fertilizer desalination system; characterized in that: Including elution system, evaporation system and reflux system; The elution system comprises a salinity adjustment tank, a filtering mechanism and an online salinity detection system; the salinity adjustment tank comprises a tank body, a central screw, a screw sleeve and a driver; the central screw is rotatably connected to the tank body along the central axis of the tank body, and the upper end of the central screw is rotatably connected to the top wall of the tank body; the driver is fixedly connected to the outer side of the top wall of the tank body, and the upper end of the central screw extends from the top wall of the tank body and is transmission-connected to the driver; the screw sleeve is sleeved on the central screw by a thread, and a longitudinally extending limit strip is provided on the inner surface of the tank body, and a longitudinal limit opening adapted to the limit strip is provided on the side of the screw sleeve, and the central screw is driven to rotate by the driver, so that the longitudinal limit opening of the screw sleeve slides sealedly on the inner wall of the tank body along the limit strip; a feed pipe is provided on the upper part of the tank body and a discharge opening is provided on the bottom wall of the tank body, and the filtering mechanism is installed on the discharge opening for filtering and discharging materials; the online salinity detection system comprises a salinity detection probe and a water supply nozzle, and both the salinity detection probe and the water supply nozzle are inserted into the tank body from the outside of the tank body; The evaporation system comprises an evaporation pool and a light-transmitting arch shed; the light-transmitting arch shed covers the top of the evaporation pool, and the bottom of the light-transmitting arch shed is fixed to the pool edge of the evaporation pool, so that the light-transmitting arch shed seals the evaporation pool; the pool edge is provided with a confluence trough located on the inner side of the bottom of the light-transmitting arch shed, and the discharge port is connected to the evaporation pool, and the water in the brine in the evaporation pool is evaporated and condensed on the inner surface of the light-transmitting arch shed, so that the salt in the brine is retained in the evaporation pool and the condensed water flows into the confluence trough along the inner surface of the light-transmitting arch shed; The water in the confluence trough is connected to the water supply nozzle through a reflux system; The limit strips are provided with two, and the two limit strips are relatively distributed on the inner surface of the tank body; the side of the screw rod sleeve is provided with longitudinal limit openings corresponding to the two limit strips one by one; The salinity detection probes and water supply nozzles are provided in plurality, all of which are embedded in the upper, middle and lower parts of the same limit strip, all of which are divided into two rows, and the two rows of water supply nozzles are embedded in the two limit strips one by one, and all of which are exposed inside the tank body; The side of the central screw rod is provided with a plurality of staggered longitudinal grooves, each of which is provided with a magnetic stirring rod, the upper end of each stirring rod is hinged to the upper part of the corresponding longitudinal groove, and the hinge shaft of the stirring rod is provided with a torsion spring; the lower part of each longitudinal groove is provided with an electromagnet, and the electromagnet is de-energized, so that the stirring rod is swung to a horizontal position under the elastic force of the torsion spring.

2. An organic fertilizer desalination system according to claim 1, characterized in that: The thickness of the stirring rod is not greater than the depth of the longitudinal groove, and the lower end of each stirring rod is provided with a downward inclined surface, and the inclined surface faces the side of the central screw rod.

3. An organic fertilizer desalination system according to claim 1, characterized in that: The filtering mechanism includes a filter frame, a sealing gate, a first telescopic motor and a second telescopic motor; the sides of the tank body are respectively provided with sockets adapted to the filter frame and the sealing gate, and both sockets penetrate the discharge port transversely; the cylinder seat of the first telescopic motor and the cylinder seat of the second telescopic motor are both fixedly connected to the side of the tank body, and the telescopic rod of the first telescopic motor is fixedly connected to the filter frame, and the telescopic rod of the second telescopic motor is fixedly connected to the sealing gate, the first telescopic motor is telescoped to drive the filter frame to extend into or be pulled out from the corresponding socket, and the second telescopic motor is telescoped to drive the sealing gate to extend into or be pulled out from the corresponding socket.

4. An organic fertilizer desalination system according to claim 3, characterized in that: A sealing ring is provided between the filter frame and the corresponding socket and between the sealing gate and the corresponding socket, and the length of the sealing ring corresponding to the filter frame is not less than the side length of the filter frame.

5. An organic fertilizer desalination system according to claim 4, characterized in that: The reflux system includes a water storage tank arranged directly below the evaporation tank and a water replenishment tank placed next to the evaporation tank. The confluence trough extends to the water storage tank. The water storage tank is connected to the water replenishment tank through a first pumped pipeline. Each water supply nozzle extends out of the tank body through a valved joint. The water replenishment tank is connected to all valved joints through a second pumped pipeline.

6. An organic fertilizer desalination system according to claim 1, characterized in that: The top and side of the light-transmitting arch shed are respectively provided with an air inlet pipe and an air outlet pipe located outside the light-transmitting arch shed, a gas deodorizer is provided between the air inlet pipe and the air outlet pipe, and a moisture filter pad is provided at the air inlet of the air inlet pipe.

7. A method for desalting organic fertilizer, characterized in that: Applied to the organic fertilizer desalination system described in claim 5, the steps are as follows: S1. The driver drives the central screw to reverse, so that the screw sleeve moves up to the top of the tank body, and the filter frame and the sealing gate are inserted into the corresponding sockets; S2, the crushed organic fertilizer raw material is added into the tank through the feed pipe, and salt-free water is added; S3, all electromagnets lose power, and all stirring rods swing upward from a vertical state to a horizontal state under the elastic force of the corresponding torsion springs; S4, the driver drives the central screw rod to reciprocate forward and reverse, so that the stirring rod mixes the organic fertilizer raw materials and the salt-free water to form salt-containing water, and the salinity detection probe detects the salt content in the salt-containing water; S5. If the real-time salt content value detected by the salinity detection probe is higher than the set salt content value, the second telescopic motor drives the sealing gate to be partially or completely withdrawn from the corresponding socket, the driver drives the central screw to rotate forward, the screw sleeve moves downward and squeezes the organic fertilizer raw material on the filter frame, squeezes out most of the salt water in the organic fertilizer raw material, and the excess salt water is discharged to the evaporation pool; During the process of the screw sleeve in S6 and S5 moving down along the central screw, the stirring rod is squeezed by the screw sleeve to swing downward to the corresponding longitudinal groove, and the electromagnet in the longitudinal groove is energized to attract the stirring rod, the driver drives the central screw to reverse and make the screw sleeve slide up and reset, and the second telescopic motor drives the sealing gate to insert into the corresponding socket; S7, the water in the salt water evaporates and condenses on the inner surface of the light-transmitting arch shed, the condensed water flows into the water storage tank through the confluence trough and forms salt-free water, and the salt-free water flows back to the tank through the first pump pipeline, the water replenishment tank and the second pump pipeline; S8, repeat S3-S7 until the real-time salt content value detected by the salinity detection probe is less than or equal to the set salt content value; S9, the second telescopic motor drives the sealing gate to be completely withdrawn from the corresponding socket, the driver drives the central screw to rotate forward, the screw sleeve squeezes and filters out most of the salt water in the organic fertilizer raw material, the driver drives the central screw to reverse, and the screw sleeve resets; S10; the first telescopic motor drives the filter frame to be completely pulled out from the corresponding socket, and the squeezed organic fertilizer raw material is discharged from the discharge port, and the desalination is completed.

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