A solid-liquid separation flushing device for industrialized batch production of semi-finished potassium nitrate

Abstract

This invention discloses a solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate, relating to the field of industrial-scale potassium nitrate production technology. It includes a feeding mechanism and a rotating screw mechanism. When the rotating screw mechanism rotates, the material is separated into solid and liquid phases by the sieving action of the filtration mechanism. A material leveling and anti-clogging mechanism and an elastic adjustment mechanism are installed above the filtration mechanism, and a rinsing mechanism is also installed above the filtration mechanism. This invention provides a solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate. By incorporating the material leveling and anti-clogging mechanism and the elastic adjustment mechanism, dynamic adjustment and mechanical cleaning of the filter cloth are achieved during the filtration process, preventing the adhesion and aggregation of potassium nitrate crystals and maintaining unobstructed filtration channels. Through the synergistic effect of the inclined feeding mechanism and the rotating screw mechanism, uniform distribution and continuous conveying of the material are achieved, avoiding local accumulation and channeling phenomena.

Description

Technical Field

[0001] This invention relates to the field of industrial mass production technology of potassium nitrate, specifically to a solid-liquid separation and rinsing device for industrial mass production of semi-finished potassium nitrate. Background Technology

[0002] Potassium nitrate (KNO3) is an important inorganic compound widely used in agricultural fertilizers, industrial glass manufacturing, metal heat treatment, food processing, and pharmaceuticals. Currently, the main processes for producing potassium nitrate include the sodium nitrate-potassium chloride conversion method, the ammonium nitrate-potassium chloride metathesis method, the ammonium nitrate-potassium chloride ion exchange method, and the nitrate-potassium chloride solvent extraction method. The ammonium nitrate-potassium chloride metathesis method has become the mainstream process for industrial production of potassium nitrate due to its advantages such as strong raw material adaptability, simple equipment, low investment cost, and safety without pollution. The basic principle of this process is to utilize the metathesis reaction between ammonium nitrate and potassium chloride at high temperature to produce potassium nitrate and ammonium chloride. The reaction equation is as follows: NH4NO3 + KCl → KNO3 + NH4Cl; Traditional three-legged centrifuges or horizontal screw discharge centrifuges are widely used in potassium nitrate production. However, conventional centrifuges have the following technical problems when processing potassium nitrate slurry: 1. Potassium nitrate crystals easily adhere to the surface of the filter cloth during the separation process, forming a dense filter cake layer, which leads to a sharp increase in filtration resistance and a significant decrease in separation efficiency. Especially in industrial mass production, the continuous operating time is limited, and frequent shutdowns are required to clean or replace the filter cloth, which seriously affects production efficiency and equipment utilization. 2. Many existing equipment operate intermittently, with separation, washing, and unloading processes carried out in separate steps. Materials need to be transferred multiple times, which not only increases labor intensity but also easily causes crystal breakage and material loss, making it difficult to meet the continuous and automated requirements of industrial mass production. 3. Existing washing methods are mostly simple spraying or soaking, resulting in insufficient contact between the washing liquid and solids, and incomplete removal of impurities. To meet product quality requirements, multiple washes or large amounts of washing water are often required, which not only increases production costs but also generates a large amount of saline wastewater, increasing the economic burden of subsequent treatment.

[0003] Therefore, improvements were made to address the aforementioned technical issues. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate. By incorporating a material equalization and anti-clogging mechanism and an elastic adjustment mechanism, the device achieves dynamic adjustment and mechanical cleaning of the filter cloth during the filtration process, preventing the adhesion and aggregation of potassium nitrate crystals and maintaining unobstructed filtration channels. The synergistic action of the inclined feeding mechanism and the rotating screw mechanism ensures uniform distribution and continuous conveying of materials, avoiding localized accumulation and channeling. The optimized rinsing mechanism achieves uniform spraying and efficient contact of the washing liquid, improving impurity removal efficiency and reducing washing water consumption. Through the coordinated operation and automated control of various mechanisms, continuous operation of feeding, separation, washing, and discharging is achieved, improving production efficiency and reducing labor intensity.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate includes an inclined feeding mechanism and a rotating screw mechanism. The feeding mechanism is used to transport the material into the rotating screw mechanism. When the rotating screw mechanism rotates, the material is separated into solid and liquid phases by the screening action of the filtration mechanism. A uniform material anti-clogging mechanism and an elastic adjustment mechanism are provided above the filtration mechanism to prevent the material from sticking and agglomerating. A rinsing mechanism is provided above the filtration mechanism to perform spray washing operation on the material in the rotating screw mechanism.

[0006] As a further improvement to the above solution, the feeding mechanism includes a material cylinder, a feeding section is provided at the top of the material cylinder, the feeding section has a bucket-shaped structure, a pushing component is provided inside the material cylinder, a blocking component is provided at the top of the pushing component at the lower part of the feeding section, the side of the pushing component away from the rotating screw mechanism is connected to the telescopic shaft end of the linear drive component, and a first rotating drive component and a reducer are provided on the side of the housing.

[0007] As a further improvement to the above solution, the rotating spiral mechanism includes a drive shaft and spiral blades. The drive shaft is connected to the filter screen in the filtration mechanism through a connecting rod. The filter screen has a sieve structure, and a filter cloth is provided on the outside of the filter screen. The filter cloth has an hourglass-shaped structure with large diameters at both ends and a small diameter in the middle. An elastic adjustment mechanism is provided at the smallest diameter position in the middle of the filter cloth. The elastic adjustment mechanism includes an elastic telescopic belt with a ring structure. The elastic telescopic belt has a circumferential array of collars, which are sleeved on a smooth guide rod. The smooth guide rod is set in the housing through a mounting rod.

[0008] As a further improvement to the above solution, the collar has a ring-shaped structure, and a notch is provided at the end of the collar facing the mounting rod.

[0009] As a further improvement to the above solution, the flushing mechanism includes an infusion pipeline, with multiple flushing nozzles arranged below the infusion pipeline, and one end of the infusion pipeline extending to connect to the first pipeline inside the infusion supply mechanism.

[0010] As a further improvement to the above solution, one end of the first pipeline is connected to a first control valve, a temperature sensor, and a flow sensor, and the other end of the first pipeline is connected to the output end of a liquid pump. The input end of the liquid pump is connected to a second pipeline from which an external cleaning fluid is supplied, and a second control valve is installed on the second pipeline.

[0011] As a further improvement to the above solution, the material leveling and anti-clogging mechanism includes a crankshaft, a first connecting rod hinged on the crankshaft, a second connecting rod hinged at the lower end of the first connecting rod, a contact plate for pressing the filter cloth is provided at the end of the second connecting rod that passes downward through the housing, and one end of the crankshaft is connected to the output shaft end of the third rotary drive component.

[0012] As a further improvement to the above solution, a discharge mechanism is provided on the side of the rotating screw mechanism. The discharge mechanism includes a second rotating drive member. The discharge rotating rod connected to the output shaft end of the second rotating drive member passes downward through the housing, the first discharge cylinder, and the second discharge cylinder. A first discharge plate is provided between the first discharge cylinder and the second discharge cylinder and on the discharge rotating rod. A second discharge plate is provided inside the second discharge cylinder and on the discharge rotating rod.

[0013] As a further improvement to the above scheme, the second discharge cylinder, the first discharge cylinder, and the side of the housing away from the drive shaft are respectively provided with a second solid phase discharge pipe, a first solid phase discharge pipe, and a liquid discharge pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: By incorporating a material leveling and anti-clogging mechanism and an elastic adjustment mechanism, the filter cloth is dynamically adjusted and mechanically cleaned during the filtration process, preventing potassium nitrate crystals from adhering and agglomerating, and keeping the filtration channel unobstructed. The synergistic action of the inclined feeding mechanism and the rotating screw mechanism ensures uniform material distribution and continuous conveying, avoiding local accumulation and channeling. The optimized rinsing mechanism achieves uniform spraying and efficient contact of the washing liquid, improving impurity removal efficiency and reducing washing water consumption. Through the mutual coordination and automated control of various mechanisms, continuous operation of feeding, separation, washing, and discharging is achieved, improving production efficiency and reducing labor intensity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0016] Figure 2 This is a partially enlarged schematic diagram of the feeding mechanism of the present invention.

[0017] Figure 3 This is a partially enlarged schematic diagram of the location of the material leveling and anti-blocking mechanism of the present invention.

[0018] Figure 4 This is a partially enlarged schematic diagram of the location of the material discharge mechanism of the present invention.

[0019] Figure 5 For the present invention Figure 1 Schematic diagram of the cross-sectional structure at point AA.

[0020] Figure 6 This is a partially enlarged schematic diagram of the collar position of the present invention.

[0021] The text labels in the diagram represent: 1. Feeding section; 2. Feeding mechanism; 3. Rotary screw mechanism; 4. Filtration mechanism; 5. Discharge mechanism; 6. Uniform material anti-clogging mechanism; 7. Elastic adjustment mechanism; 8. Flushing mechanism; 9. Liquid supply mechanism; 201. Material stop; 202. Material pusher; 203. Linear drive; 204. First rotary drive; 205. Reducer; 206. Housing; 207. Material cylinder; 301. Spiral blade; 302. Drive shaft; 303. Connecting rod; 401. Filter cloth; 402. Filter screen; 501. Discharge rotating rod; 502. Second rotary drive; 503. First discharge cylinder; 504. First discharge plate; 505. Second discharge cylinder; 506. Second discharge plate; 507. Discharge pipe; 508. First solid phase discharge pipe; 509. Second solid phase discharge pipe; 601. Crankshaft; 602. Third rotary drive component; 603. First connecting rod; 604. Second connecting rod; 605. Contact plate; 701. Elastic telescopic belt; 702. Smooth guide rod; 703. Notch; 704. Collar; 705. Mounting rod; 801. Flushing nozzle; 802. Infusion pipeline; 901. Flow sensor; 902. Temperature sensor; 903. First control valve; 904. First pipeline; 905. Liquid pump; 906. Second pipeline; 907. Second control valve. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0023] like Figures 1-6 As shown, the specific solution of this embodiment is as follows: a solid-liquid separation and rinsing device for industrial mass production of semi-finished potassium nitrate, including an inclined feeding mechanism 2 and a rotating screw mechanism 3. The feeding mechanism 2 is used to transport the material into the rotating screw mechanism 3. When the rotating screw mechanism 3 rotates, the material is separated into solid phase and liquid phase under the screening action of the filtration mechanism 4. A uniform material anti-blocking mechanism 6 and an elastic adjustment mechanism 7 are provided above the filtration mechanism 4 to prevent the material from sticking and agglomerating. A rinsing mechanism 8 is provided above the filtration mechanism 4 to perform spray washing operation on the material in the rotating screw mechanism 3.

[0024] More specifically, the feeding mechanism 2 adopts an inclined arrangement, utilizing gravity to assist material conveying and reduce pushing resistance. At the same time, the inclined angle is optimized to ensure that the material can smoothly enter the rotating screw mechanism 3 and avoid material accumulation. The angle between the inclined angle and the horizontal plane is not less than 25°. The feeding mechanism 2 is used to push and convey the material into the rotating screw mechanism 3. The filtration mechanism 4 is used to separate the semi-finished potassium nitrate material into solid and liquid phases. The material moves forward in a rotating motion within the filter screen 402 along the axial direction of the drive shaft 302. The spiral blades 301 play a role in stirring and dispersing to prevent material accumulation. The material leveling and anti-clogging mechanism 6 plays a role in leveling and anti-clogging the filter cloth 401. The elastic adjustment mechanism 7 plays a role in elastically adjusting the diameter of the middle part of the filter cloth 401.

[0025] As a preferred embodiment of the above, the feeding mechanism 2 includes a material cylinder 207, a feeding part 1 is provided at the top of the material cylinder 207, the feeding part 1 has a bucket-shaped structure, a pusher 202 is provided inside the material cylinder 207, a stopper 201 is provided at the top of the pusher 202 and is located at the lower part of the feeding part 1, the side of the pusher 202 away from the rotating screw mechanism 3 is connected to the telescopic shaft end of the linear drive 203, and a first rotating drive 204 and a reducer 205 are provided on the side of the housing 206.

[0026] More specifically, the feed section 1 has a bucket-shaped structure with a large opening area, facilitating the receipt of potassium nitrate slurry from upstream processes (such as crystallizers). Simultaneously, the bucket-shaped structure acts as a guide, causing the material to concentrate and fall into the feed cylinder 207. The linear drive component 203 can be a hydraulic cylinder. Driving the linear drive component 203, the pusher component 202 pushes the material in the feed cylinder 207 towards the rotating screw mechanism 3. The drive shaft 302 passes through the middle of the pusher component 202. When the pusher component 202 performs linear motion, it does not affect the rotational motion of the drive shaft 302. A rotary drive component 204 uses a motor, and a reducer 205 reduces the rotational speed of the drive shaft 302. The spiral blades 301 rotate under the drive shaft 302, applying axial thrust and radial centrifugal force to the incoming potassium nitrate slurry. The axial thrust moves the material towards the discharge end, achieving continuous conveying; the radial centrifugal force causes the liquid in the material to be thrown outward through the filter cloth 401, achieving preliminary solid-liquid separation. The drive shaft 302 is connected to the filter screen 402 via a connecting rod 303, causing the filter screen 402 to rotate synchronously with the drive shaft 302. The advantages of this design are: the rotating filter screen 402 drives the filter cloth 401 to rotate together, generating centrifugal force to enhance the separation effect; at the same time, the rotational motion continuously disturbs the material layer on the surface of the filter cloth 401, reducing adhesion; the screen structure of the filter screen 402 can perform sieving operations and also provides support for the filter cloth 401, preventing excessive deformation or damage to the filter cloth 401 under centrifugal force.

[0027] As a preferred embodiment of the above, the rotating spiral mechanism 3 includes a drive shaft 302 and a spiral blade 301. The drive shaft 302 is connected to the filter screen 402 in the filter mechanism 4 through a connecting rod 303. The filter screen 402 has a sieve structure. A filter cloth 401 is provided on the outside of the filter screen 402. The filter cloth 401 has an hourglass-shaped structure with large diameters at both ends and a small diameter in the middle. An elastic adjustment mechanism 7 is provided at the smallest diameter position in the middle of the filter cloth 401. The elastic adjustment mechanism 7 includes an elastic telescopic belt 701. The elastic telescopic belt 701 has a ring structure. A collar 704 is arranged in a circumferential array on the elastic telescopic belt 701. The collar 704 is sleeved on the smooth guide rod 702. The smooth guide rod 702 is set in the housing 206 through a mounting rod 705.

[0028] More specifically, the filter cloth 401 is designed as an hourglass-shaped structure with large diameters at both ends and a small diameter in the middle. As the material enters from the large diameter end and moves towards the small diameter end, the flow cross-sectional area gradually decreases and the flow velocity gradually increases, forming a velocity gradient. This is beneficial for the liquid to permeate and separate outwards. The material is subjected to greater compression in the small diameter region. The hourglass-shaped structure allows the material to enter the expansion section after passing through the smallest diameter region, where the pressure is released, which is beneficial for the loosening of solids and prevents excessive compaction that could cause the filter cloth 401 to become clogged.

[0029] The elastic adjustment mechanism 7 facilitates the dynamic adjustment of the filter cloth 401 during the filtration process. Based on changes in material load and slurry concentration, the elastic stretch belt 701 automatically adjusts the degree of shrinkage of the filter cloth 401, maintaining appropriate filtration pressure and ensuring the stability of the separation effect. During rotation, the elastic stretch belt 701 rotates with the filter cloth 401. Due to its own elasticity and centrifugal force, it generates periodic squeezing and releasing action on the filter cloth 401, forming a pulsating filtration effect, promoting liquid discharge and preventing filter pore blockage. The elastic stretch belt 701 forms a sliding guide structure on the collar 704, allowing the filter cloth 401 to elastically deform in the radial direction while limiting its excessive displacement, maintaining the shape stability of the filter cloth 401. The smooth guide rod 702 has a polished surface, forming a low-friction pair with the collar 704, ensuring smooth rotation of the filter cloth 401 and reducing energy consumption.

[0030] As a preferred embodiment of the above, the collar 704 has a ring-shaped structure, and a notch 703 is provided at the end of the collar 704 facing the mounting rod 705.

[0031] More specifically, a low-friction pair is formed between the smooth guide rod 702 and the collar 704, which allows the elastic stretch band 701 to continuously shrink and expand. The smooth guide rod 702 has a variable diameter ring structure, which provides the necessary basic conditions for the dynamic adjustment of the filter cloth 401. The notch 703 is used to avoid gaps in the mounting rod 705, so that the collar 704 can pass through the smooth guide rod 702 without obstruction.

[0032] As a preferred embodiment of the above, the flushing mechanism 8 includes an infusion pipe 802, with a plurality of flushing nozzles 801 disposed below the infusion pipe 802, and one end of the infusion pipe 802 extending to connect to a first pipe 904 within the liquid supply mechanism 9.

[0033] As a preferred embodiment of the above, one end of the first pipe 904 is connected to the first control valve 903, the temperature sensor 902, and the flow sensor 901, and the other end of the first pipe 904 is connected to the output end of the liquid pump 905. The input end of the liquid pump 905 is connected to the second pipe 906, which is an external source of cleaning fluid. A second control valve 907 is provided on the second pipe 906.

[0034] More specifically, the infusion pipeline 802 serves as the main distribution pipe for the washing liquid, arranged along the length of the filter mechanism 4 to ensure that each rinsing nozzle 801 receives a uniform supply of washing liquid. The arrangement of multiple rinsing nozzles 801 covers the entire filtration area, allowing the washing liquid to be sprayed evenly on the material surface, avoiding localized over-washing or under-washing. The second pipeline 906 is connected to an external source of cleaning liquid, which can be a saturated potassium nitrate solution or distilled water. The first control valve 903 and the second control valve 907 are used to control the on / off operation of the liquid. The temperature sensor 902 is used to sense the temperature, and the flow sensor 901 is used to monitor the flow rate. The connection and configuration between the temperature sensor 902, the flow sensor 901, and the central control processor are conventional technical solutions in the field of electrical control technology, and will not be described in detail here.

[0035] As a preferred embodiment of the above, the material leveling and anti-blocking mechanism 6 includes a crankshaft 601, a first connecting rod 603 hinged to the crankshaft 601, a second connecting rod 604 hinged to the lower end of the first connecting rod 603, a contact plate 605 for pressing the filter cloth 401 is provided at the end of the second connecting rod 604 that passes downward through the housing 206, and one end of the crankshaft 601 is connected to the output shaft end of the third rotary drive 602.

[0036] More specifically, the material leveling and anti-clogging mechanism 6 provided in this application serves as a mechanical cleaning mechanism. The crankshaft 601 rotates under the drive of the third rotary drive component 602 (such as a motor). Through the first connecting rod 603 and the second connecting rod 604, the rotational motion is converted into the reciprocating linear motion of the contact plate 605, transforming continuous rotational motion into periodic linear impact motion. This allows the contact plate 605 to press against the filter cloth 401 at a certain frequency. The crankshaft 601 is mounted on the housing 206 via a mounting base, ensuring smooth rotational motion. By adjusting the eccentricity of the crankshaft 601 or the length of the connecting rod, the stroke and impact force of the contact plate 605 can be changed to adapt to different working conditions. The linkage mechanism has a simple structure and strong load-bearing capacity, making it suitable for long-term stable operation in chemical production environments. The contact plate 605 is located at the lower end of the second linkage 604 and acts directly on the surface of the filter cloth 401. The contact plate 605 periodically presses the filter cloth 401, generating mechanical vibration, which causes the potassium nitrate crystals adhering to the surface of the filter cloth 401 to fall off, preventing blockage. The vibration action redistributes the material layer on the surface of the filter cloth 401, eliminating local accumulation and improving filtration uniformity. The material uniformity and anti-blocking mechanism 6 and the elastic adjustment mechanism 7 work together to achieve dynamic adjustment and mechanical cleaning of the filter cloth 401 during the filtration process, preventing the adhesion and aggregation of potassium nitrate crystals, keeping the filtration channel unobstructed, and achieving significant results.

[0037] As a preferred embodiment of the above, a discharge mechanism 5 is provided on the side of the rotating screw mechanism 3. The discharge mechanism 5 includes a second rotating drive member 502. The discharge rotating rod 501 connected to the output shaft end of the second rotating drive member 502 passes downward through the housing 206, the first discharge cylinder 503, and the second discharge cylinder 505. A first discharge plate 504 is provided between the first discharge cylinder 503 and the second discharge cylinder 505 and on the discharge rotating rod 501. A second discharge plate 506 is provided inside the second discharge cylinder 505 and on the discharge rotating rod 501.

[0038] As a preferred embodiment of the above, the second discharge cylinder 505, the first discharge cylinder 503, and the side of the housing 206 away from the drive shaft 302 are respectively provided with a second solid phase discharge pipe 509, a first solid phase discharge pipe 508, and a liquid discharge pipe 507.

[0039] More specifically, the solid and liquid phases are discharged separately through the second discharge cylinder 505, the first discharge cylinder 503, the second solid phase discharge pipe 509, the first solid phase discharge pipe 508, and the liquid discharge pipe 507. The rotating first discharge plate 504 and the second discharge plate 506 apply a pushing force to the material to overcome the adhesion and accumulation pressure of the material and ensure smooth discharge.

[0040] The specific working principle of this invention is as follows: The feed section 1 has a bucket-shaped structure with a large opening area, facilitating the receipt of potassium nitrate slurry from upstream processes (such as crystallizers). Simultaneously, the bucket-shaped structure acts as a guide, causing the material to concentrate and fall into the feed cylinder 207. The linear drive 203 can be a hydraulic cylinder. Driving the linear drive 203, the pusher 202 pushes the material in the feed cylinder 207 towards the rotating screw mechanism 3. The drive shaft 302 passes through the middle of the pusher 202. When the pusher 202 moves linearly, it does not affect the rotational movement of the drive shaft 302. The first rotation... The drive unit 204 uses a motor, and the reducer 205 reduces the rotational speed of the drive shaft 302. The spiral blades 301 rotate under the drive shaft 302, applying axial thrust and radial centrifugal force to the incoming potassium nitrate slurry. The axial thrust moves the material towards the discharge end, achieving continuous conveying; the radial centrifugal force causes the liquid in the material to be thrown outward through the filter cloth 401, achieving preliminary solid-liquid separation. The drive shaft 302 is connected to the filter screen 402 through the connecting rod 303, so that the filter screen 402 rotates synchronously with the drive shaft 302. The advantages of this design are: the rotating filter screen 402 drives the filter cloth 401 to rotate together, generating centrifugal force to enhance the separation effect; at the same time, the rotational motion continuously disturbs the material layer on the surface of the filter cloth 401, reducing adhesion; the screen structure of the filter screen 402 can perform sieving operations, and also provides support for the filter cloth 401, preventing the filter cloth 401 from being excessively deformed or damaged under the action of centrifugal force.

[0041] It should be noted that, in this document, the terms "including," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the present invention. These examples are merely for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be pointed out that, due to the limitations of written expression and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or variations without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate, characterized in that, It includes an inclined feeding mechanism (2) and a rotating screw mechanism (3). The feeding mechanism (2) is used to transport the material into the rotating screw mechanism (3). When the rotating screw mechanism (3) rotates, the material is separated into solid and liquid phases under the screening action of the filtration mechanism (4). A uniform material anti-blocking mechanism (6) and an elastic adjustment mechanism (7) are provided above the filtration mechanism (4) to prevent the material from sticking and agglomerating. A rinsing mechanism (8) is provided above the filtration mechanism (4) to perform spray washing operation on the material in the rotating screw mechanism (3).

2. The solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate according to claim 1, characterized in that, The feeding mechanism (2) includes a material cylinder (207), a feeding part (1) is provided at the top of the material cylinder (207), the feeding part (1) has a bucket-shaped structure, a pusher (202) is provided inside the material cylinder (207), a stopper (201) is provided at the top of the pusher (202) and is located at the bottom of the feeding part (1), the side of the pusher (202) away from the rotating screw mechanism (3) is connected to the telescopic shaft end of the linear drive (203), and a first rotating drive (204) and a reducer (205) are provided on the side of the housing (206).

3. A solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate according to claim 1, characterized in that, The rotating spiral mechanism (3) includes a drive shaft (302) and a spiral blade (301). The drive shaft (302) is connected to the filter screen (402) in the filter mechanism (4) through a connecting rod (303). The filter screen (402) has a sieve structure. A filter cloth (401) is provided on the outside of the filter screen (402). The filter cloth (401) has an hourglass-shaped structure with large diameters at both ends and small diameters in the middle. An elastic adjustment mechanism (7) is provided at the smallest diameter position in the middle of the filter cloth (401). The elastic adjustment mechanism (7) includes an elastic telescopic belt (701). The elastic telescopic belt (701) has a ring structure. A collar (704) is arranged in a circular array on the elastic telescopic belt (701). The collar (704) is sleeved on the smooth guide rod (702). The smooth guide rod (702) is set in the housing (206) through a mounting rod (705).

4. A solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate according to claim 3, characterized in that, The collar (704) has a ring-shaped structure, and a notch (703) is provided at the end of the collar (704) facing the mounting rod (705).

5. A solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate according to claim 1, characterized in that, The flushing mechanism (8) includes an infusion pipe (802), and multiple flushing nozzles (801) are provided below the infusion pipe (802). One end of the infusion pipe (802) extends to connect to the first pipe (904) inside the liquid supply mechanism (9).

6. A solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate according to claim 5, characterized in that, One end of the first pipe (904) is connected to the first control valve (903), temperature sensor (902), and flow sensor (901). The other end of the first pipe (904) is connected to the output end of the liquid pump (905). The input end of the liquid pump (905) is connected to the second pipe (906) from the external cleaning fluid source. The second pipe (906) is equipped with a second control valve (907).

7. A solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate according to claim 1, characterized in that, The material leveling and anti-clogging mechanism (6) includes a crankshaft (601), a first connecting rod (603) is hinged on the crankshaft (601), a second connecting rod (604) is hinged at the lower end of the first connecting rod (603), a contact plate (605) for pressing the filter cloth (401) is provided at the end of the second connecting rod (604) that passes downward through the housing (206), and one end of the crankshaft (601) is connected to the output shaft end of the third rotary drive (602).

8. A solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate according to claim 1, characterized in that, The rotating screw mechanism (3) is provided with a discharge mechanism (5) on its side. The discharge mechanism (5) includes a second rotating drive (502). The discharge rotating rod (501) connected to the output shaft end of the second rotating drive (502) passes downward through the housing (206), the first discharge cylinder (503), and the second discharge cylinder (505). A first discharge plate (504) is provided between the first discharge cylinder (503) and the second discharge cylinder (505) and on the discharge rotating rod (501). A second discharge plate (506) is provided inside the second discharge cylinder (505) and on the discharge rotating rod (501).

9. A solid-liquid separation and rinsing device for the industrial-scale mass production of semi-finished potassium nitrate according to claim 8, characterized in that, The second discharge cylinder (505), the first discharge cylinder (503), and the housing (206) are respectively provided with a second solid phase discharge pipe (509), a first solid phase discharge pipe (508), and a liquid discharge pipe (507) on the side away from the drive shaft (302).

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