A methylhydrazine separation device

Abstract

This invention belongs to the field of methylhydrazine production technology, specifically a methylhydrazine separation device, including a separation tank, an isolation column located below the separation tank, a circulation mechanism installed outside the separation tank, a separation mechanism installed above the separation tank, and a coarse screening mechanism installed inside the separation tank. By setting up the coarse screening mechanism, the raw material enters the primary ultrafiltration cartridge and then flows through the return pipe into the annular pipe, dispersing the raw material within the annular pipe into the modified ultrafiltration cartridge. When some primary ultrafiltration cartridges are no longer in use, the connecting assembly connects to the fixed pipe, connecting the shaped tube to the fixed pipe and the branch pipe. The control valve closes the connection between the shaped tube and the annular pipe, allowing the annular pipe to operate normally. Only the connection between the primary ultrafiltration cartridge and the modified ultrafiltration cartridge is severed, separating the clean area from the working area. This traps large impurities inside the primary ultrafiltration cartridge, reducing the impurity content in the raw material and minimizing damage to the modified ultrafiltration cartridge.

Description

Technical Field

[0001] This invention belongs to the field of methylhydrazine production technology, specifically a methylhydrazine separation device. Background Technology

[0002] Methylhydrazine, a crucial chemical raw material, is widely used in aerospace, pharmaceutical, and agricultural fields both domestically and internationally. In the aerospace field, methylhydrazine is a storable fuel for spacecraft; in the pharmaceutical field, it is an important raw material for synthesizing various drugs; and in the agricultural field, it can be used to produce highly effective herbicides and pesticides.

[0003] Existing separation devices for methylhydrazine production introduce modifiers such as silica, carbon nanotubes, and zinc oxide through blending modification and surface grafting to improve the hydrophilicity, mechanical strength, and antifouling performance of the membrane. In terms of the separation process, attempts are made to optimize parameters such as operating pressure, temperature, and feed concentration to improve the separation efficiency and product purity of methylhydrazine. However, during cross-flow operation, the feed liquid washes the membrane surface at a high speed. If the feed contains a small amount of particulate matter or colloids, long-term washing may cause the hollow fiber membrane filaments to become thinner or clogged. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this invention is: a methylhydrazine separation device, comprising a separation tank, and further comprising: The isolation column is located below the separation tank, the circulation mechanism is installed outside the separation tank, the separation mechanism is installed above the separation tank, and the coarse screening mechanism is installed inside the separation tank. The separation mechanism includes a feed pipe installed above the separation tank, a cleaning assembly disposed inside the feed pipe, and a rotating filter element rotatably connected inside the feed pipe.

[0005] Furthermore, it also includes: A modified ultrafiltration cartridge is installed inside a separation tank. The upper part of the modified ultrafiltration cartridge is connected to the lower part of a coarse screening mechanism. The separation tank has an internal interlayer, and the coarse screening mechanism is located inside the interlayer. The coarse screening mechanism screens the raw materials.

[0006] Furthermore, the circulation mechanism includes: Branch pipe, which is installed above the coarse screening mechanism, is a three-ended pipe that connects the four primary ultrafiltration cartridges of the coarse screening mechanism together, so that the raw material enters from the separation mechanism and enters the primary ultrafiltration cartridges respectively. The valve is installed above the branch pipe. Initially, the valve is closed, allowing the raw material entering the separation mechanism to directly enter the primary ultrafiltration element. After the primary ultrafiltration element has been used for a period of time, the valve is opened and the feed end of the branch pipe is closed, allowing the remaining material to be backwashed in the primary ultrafiltration element and then discharged. An adjusting pipe is installed at the end of the branch pipe away from the separation mechanism. The adjusting pipe can rotate at one end of the branch pipe to facilitate the addition of cleaning agent.

[0007] Furthermore, the circulation mechanism also includes: A connecting component, which is mounted below the regulating pipe; A connecting pipe is provided at one end of the connecting assembly, and the other end of the connecting pipe is connected to the outside of the coarse screening mechanism. A sleeve baffle is provided at one end of the connecting pipe. The connecting assembly can only be connected to the connecting pipe after being inserted into it. When separated, one end of the connecting pipe is in a blocked state. The track is installed on the outside of the separation tank, and the connecting assembly is slidably connected on the track.

[0008] Furthermore, the coarse screening mechanism includes: A partition, which is installed above the interior of the separation tank; A primary ultrafiltration element is installed inside the separation tank. The inner diameter of the primary ultrafiltration element is larger than that of the modified ultrafiltration element, and it performs a second separation on the material that has passed through the separation mechanism. A fixed tube is installed above the primary ultrafiltration element and is connected to a branch tube to inject raw materials into the primary ultrafiltration element.

[0009] Furthermore, the coarse screening mechanism also includes: A reflux pipe is installed below the primary ultrafiltration cartridge and connects the primary ultrafiltration cartridge to the shaped tube. The irregularly shaped tube is disposed inside the interlayer, and its upper part is connected to the lower part of the return pipe.

[0010] Furthermore, the coarse screening mechanism also includes: A control valve is installed below the shaped tube, and the other end of the control valve is connected to the top of the modified ultrafiltration element. The control valve can control the connection and closure between the shaped tube and the circulation mechanism. An annular pipe is located below the shaped tube and is connected to the outside of the modified ultrafiltration cartridge. The annular pipe can simultaneously inject the raw material filtered by each primary ultrafiltration cartridge into the modified ultrafiltration cartridge below. When the primary ultrafiltration cartridges are used alternately, the annular pipe is connected to the primary ultrafiltration cartridge in operation, so that the modified ultrafiltration cartridge can maintain normal operation.

[0011] Furthermore, the connection component includes: A movable block is slidably connected on a track. The movable block has a cavity inside, and gears are rotatably connected inside the cavity. There are four sets of gears, which are located around the bend. The gears rotate under the drive of the movable block, causing the protrusions on the bend to be rotated by the gears, thereby moving the bend inward and outward respectively.

[0012] Furthermore, the connection component also includes: A bend is provided below the adjusting pipe. The other end of the bend is slidably connected to the inside of the moving pipe. A protrusion is provided on the side of the bend near the moving block. The end of the bend near the moving block is inserted into the connecting pipe.

[0013] Furthermore, the cleaning component includes: The mounting ring is disposed inside the injection tube; The scraper is located below the mounting ring, and the top of the scraper is slidably connected to the bottom of the mounting ring. The scraper can scrape along the inside of the arc-shaped piece under the drive of the mounting ring, so that the colloid and impurities on the arc-shaped piece are concentrated together for easy cleaning. An arc-shaped plate is installed inside the injection tube, with the bottom of the arc-shaped plate in contact with the outside of the rotating filter element, and the outside of the scraper blade in contact with the inside of the arc-shaped plate.

[0014] The beneficial effects of this invention are as follows: 1. This invention, by setting up a coarse screening mechanism, allows raw materials to enter the primary ultrafiltration cartridge and then pass through the return pipe into the annular pipe, dispersing the raw materials in the annular pipe into the modified ultrafiltration cartridge. When some primary ultrafiltration cartridges are no longer in use, the connecting assembly connects to the fixed pipe, connecting the shaped tube to the fixed pipe and the branch pipe. The control valve closes the connection between the shaped tube and the annular pipe, allowing the annular pipe to continue normal operation. Only the connection between the primary ultrafiltration cartridge and the modified ultrafiltration cartridge is severed, separating the clean area from the working area. This traps large impurities inside the primary ultrafiltration cartridge, reducing the impurity content in the raw materials and minimizing damage to the modified ultrafiltration cartridge.

[0015] 2. This invention incorporates a circulation mechanism. A cleaning agent is injected into the regulating pipe, which is then connected to the connecting assembly. This allows the cleaning agent to circulate throughout the branch pipe, connecting pipe, connecting assembly, and irregularly shaped pipe. A built-in water pump backwashes the primary ultrafiltration cartridge, ultimately discharging the cleaning agent for future use. By using three sets of primary ultrafiltration cartridges alternately for preliminary filtration, impurities in the raw materials are reduced. This prevents hard impurities inside the modified ultrafiltration cartridge from damaging it and increasing separation costs. The invention also enables the equipment to be used cyclically, completing cleaning during the alternating use process and saving maintenance time.

[0016] 3. This invention, through the setting of a separation mechanism, allows the raw material to first pass through a rotating filter element to pre-filter relatively large impurities. During the long feeding process, the rotating filter element is in a slow rotation state, and the arc-shaped plate scrapes the surface of the rotating filter element, trapping colloidal impurities and particles inside the arc-shaped plate. When the rotating filter element rotates to the opposite position, the colloids blocked in the holes of the rotating filter element are flushed by the raw material, causing a small amount of impurities to be washed out. Then, it passes through the primary ultrafiltration element for further filtration and finally enters the modified ultrafiltration element for separation. The cleaning component centrally treats the impurities inside to prevent impurities from blocking the rotating filter element again. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the circulation mechanism of the present invention; Figure 4 This is a schematic diagram of the separation mechanism of the present invention; Figure 5 This is a schematic diagram of the coarse screening mechanism of the present invention; Figure 6 This is the present invention. Figure 5 Schematic diagram of the structure at point A; Figure 7 This is a schematic diagram of the structure of the connecting component of the present invention; Figure 8 This is a schematic diagram of the cleaning component of the present invention.

[0018] In the diagram: 1. Separation tank; 2. Isolation column; 3. Circulation mechanism; 301. Branch pipe; 302. Valve; 303. Adjusting pipe; 304. Connecting assembly; 3041. Moving block; 3042. Cavity; 3043. Gear; 3044. Bend; 3045. Protrusion; 305. Connecting pipe; 306. Track; 4. Separation mechanism; 401. Injection pipe; 402. Cleaning assembly; 4021. Mounting ring; 4022. Scraper; 4023. Arc-shaped plate; 403. Rotary filter element; 5. Jacket; 6. Coarse screening mechanism; 601. Partition plate; 602. Primary ultrafiltration element; 603. Fixed pipe; 604. Return pipe; 605. Irregularly shaped pipe; 606. Control valve; 607. Annular pipe; 7. Modified ultrafiltration element. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0020] Example 1, please refer to Figures 1-5 The present invention provides a technical solution: a methylhydrazine separation device is described below.

[0021] Including separation tank 1, it also includes: The isolation column 2 is located below the separation tank 1, the circulation mechanism 3 is installed outside the separation tank 1, the separation mechanism 4 is installed above the separation tank 1, and the coarse screening mechanism 6 is installed inside the separation tank 1. Also includes: The modified ultrafiltration element 7 is installed inside the separation tank 1. The upper part of the modified ultrafiltration element 7 is connected to the lower part of the coarse screening mechanism 6. The separation tank 1 is provided with a jacket 5, and the coarse screening mechanism 6 is located inside the jacket 5. The coarse screening mechanism 6 screens the raw materials.

[0022] During operation, the raw material enters through the separation mechanism 4, which performs preliminary screening to intercept large particulate impurities and colloidal impurities. The raw material then enters the coarse screening mechanism 6, and then enters the modified ultrafiltration cartridge 7. Finally, the raw material filtered by the modified ultrafiltration cartridge 7 is discharged. The modified ultrafiltration cartridge 7 adopts a multi-layer gradient pore structure design, which precisely controls the pore size distribution of the macroporous support layer, transition layer, and precision separation layer to achieve graded interception of impurities of different molecular weights in the methylhydrazine aqueous solution. The feed liquid flows along the membrane surface in a cross-flow manner. Under the drive of the transmembrane pressure difference, two-phase separation occurs. The coarse screening mechanism 6 is provided with three sets, which are used alternately. After a period of use, the coarse screening mechanism 6 is connected by the circulation mechanism 3. After a period of use, the coarse screening mechanism 6 and the circulation mechanism 3 are backwashed in a closed state.

[0023] The separation mechanism 4 includes a feed pipe 401 installed above the separation tank 1, a cleaning assembly 402 disposed inside the feed pipe 401, and a rotating filter element 403 rotatably connected inside the feed pipe 401.

[0024] During use, the raw material enters the branch pipe 301 through the feed pipe 401, and then enters the primary ultrafiltration element 602. The rotating filter element 403 is inside the feed pipe 401, so that the raw material first passes through the rotating filter element 403 to pre-filter relatively large impurities. During the long feeding process, the rotating filter element 403 is in a slow rotating state. The arc-shaped plate 4023 scrapes the surface of the rotating filter element 403, trapping colloidal impurities and particles inside the arc-shaped plate 4023. When the colloid blocked in the holes of the rotating filter element 403 rotates to the opposite position, it is flushed by the raw material, so that a small amount of impurities are washed out. Then, it passes through the primary ultrafiltration element 602 for further filtration, and finally enters the modified ultrafiltration element 7 for separation. The cleaning component 402 centrally treats the impurities inside to prevent impurities from blocking the rotating filter element 403 again.

[0025] The circulation mechanism 3 includes: Branch pipe 301 is installed above the coarse screening mechanism 6. Branch pipe 301 is a three-ended pipe that connects the four primary ultrafiltration elements 602 of the coarse screening mechanism 6 together, so that the raw material enters from the separation mechanism 4 and enters the primary ultrafiltration elements 602 respectively. Valve 302 is installed above branch pipe 301. Valve 302 is initially closed, allowing the raw material entering the separation mechanism 4 to directly enter the primary ultrafiltration element 602. After the primary ultrafiltration element 602 has been used for a period of time, valve 302 is opened and the feed end of branch pipe 301 is closed, allowing the remaining material to be backwashed in the primary ultrafiltration element 602 and then discharged. The regulating pipe 303 is installed at the end of the branch pipe 301 away from the separation mechanism 4. The regulating pipe 303 can rotate at one end of the branch pipe 301, which facilitates the addition of cleaning agent into the connecting assembly 304.

[0026] The circulation mechanism 3 also includes: Connection component 304 is installed below regulating pipe 303; The connecting pipe 305 is located at one end of the connecting assembly 304, and the other end of the connecting pipe 305 is connected to the outside of the coarse screening mechanism 6. A sleeve baffle is provided at one end of the connecting pipe 305. The connecting assembly 304 and the connecting pipe 305 can be connected together. When they are separated, one end of the connecting pipe 305 is blocked. Track 306 is installed on the outside of the separation bucket 1, and connecting assembly 304 is slidably connected on track 306.

[0027] When the primary ultrafiltration element 602 is in normal use, the branch pipe 301 connected to it keeps valve 302 closed, allowing the raw material to enter the primary ultrafiltration element 602 from the connecting end of the branch pipe 301, and then directly into the modified ultrafiltration element 7. However, if the primary ultrafiltration element 602 has been used for an extended period or is clogged to a certain extent, it needs to be cleaned. In this case, the branch pipe 301 remains closed, and no more raw material enters. The raw material enters from another branch pipe 301 to continue operation. When residual raw material enters the modified ultrafiltration element 7, valve 302 opens, causing the regulating pipe 303 at one end of the branch pipe 301 to rotate, injecting cleaning agent into the regulating pipe 303. The regulating pipe 303 is connected to the connecting component 304, allowing the cleaning agent to circulate throughout the branch pipe 301, connecting pipe 305, connecting component 304, and shaped pipe 605. The built-in water pump backwashes the primary ultrafiltration element 602, and finally discharges the cleaning agent, ready for the next use. By setting up three sets of primary ultrafiltration elements 602, they are used alternately for preliminary filtration, reducing impurities in the raw materials. This prevents the raw materials containing hard impurities from entering the modified ultrafiltration element 7, which could easily damage the modified ultrafiltration element 7 and increase separation costs. The equipment can be used in a cyclical manner, and cleaning is completed during the alternating use process, saving equipment maintenance time.

[0028] The coarse screening mechanism 6 includes: Partition 601 is installed above the inside of the separation tank 1; Primary ultrafiltration element 602 is installed inside the separation tank 1. The inner diameter of the primary ultrafiltration element 602 is larger than that of the modified ultrafiltration element 7, and it performs a second separation on the material that has passed through the separation mechanism 4. The fixed tube 603 is installed above the primary ultrafiltration element 602. The fixed tube 603 is connected to the branch tube 301 to inject raw materials into the primary ultrafiltration element 602.

[0029] The coarse screening mechanism 6 also includes: The return pipe 604 is installed below the primary ultrafiltration element 602 and connects the primary ultrafiltration element 602 to the shaped tube 605. The irregular tube 605 is disposed inside the interlayer 5, and the upper part of the irregular tube 605 is connected to the lower part of the return pipe 604.

[0030] The coarse screening mechanism 6 also includes: Control valve 606 is installed below the shaped tube 605. The other end of control valve 606 is connected to the top of the modified ultrafiltration element 7. Control valve 606 can control the connection and closure between the shaped tube 605 and the circulation mechanism 3. An annular pipe 607 is located below the shaped pipe 605. The lower part of the annular pipe 607 is connected to the outside of the modified ultrafiltration element 7. The annular pipe 607 can simultaneously inject the raw material filtered by each set of primary ultrafiltration elements 602 into the modified ultrafiltration element 7 below. When the primary ultrafiltration elements 602 are used alternately, the annular pipe 607 is connected to the primary ultrafiltration element 602 that is in operation, so that the modified ultrafiltration element 7 can maintain normal operation.

[0031] During normal use, the raw material enters the primary ultrafiltration element 602 and then flows through the return pipe 604 into the annular pipe 607, dispersing the raw material in the annular pipe 607 into the modified ultrafiltration element 7. When some of the primary ultrafiltration elements 602 are no longer in use, the connecting component 304 connects to the fixed pipe 603, connecting the shaped pipe 605 to the fixed pipe 603 and the branch pipe 301. The control valve 606 closes the connection between the shaped pipe 605 and the annular pipe 607, allowing the annular pipe 607 to continue operating normally. Only the connection between the primary ultrafiltration element 602 and the modified ultrafiltration element 7 is severed, separating the clean area from the working area. This traps large impurities inside the primary ultrafiltration element 602, reducing the impurity content in the raw material and minimizing damage to the modified ultrafiltration element 7.

[0032] Example 2, please refer to Figures 1-8 The present invention provides a technical solution: based on embodiment 1, the connecting component 304 includes: The movable block 3041 is slidably connected on the track 306. The movable block 3041 has a cavity 3042 inside. Gears 3043 are rotatably connected inside the cavity 3042. There are four sets of gears 3043, which are located around the bend 3044. The gears 3043 rotate under the drive of the movable block 3041, causing the protrusions 3045 on the bend 3044 to rotate, thereby moving the bend 3044 inward and outward respectively.

[0033] Connection component 304 also includes: The bend 3044 is located below the adjusting tube 303. The other end of the bend 3044 is slidably connected to the inside of the moving tube. A protrusion 3045 is provided on the side of the bend 3044 near the moving block 3041. The end of the bend 3044 near the moving block 3041 is inserted into the connecting tube 305.

[0034] During normal filtration, the bent tube 3044 is not connected to the fixed tube 603. When the primary ultrafiltration element 602 needs to be cleaned after it has finished working, the moving block 3041 drives the gear 3043 to rotate, so that the gear 3043 drives the bent tube 3044 to be inserted into the fixed tube 603, forming a complete and sealed passage. Then, cleaning agent is poured in, so that the circulation mechanism 3 and the coarse sieve mechanism 6 cooperate to backwash the primary ultrafiltration element 602, thereby clearing out the blockage and ensuring the normal circulation and use of the primary ultrafiltration element 602, thus improving its service life.

[0035] Cleanup component 402 includes: Mounting ring 4021 is disposed inside the injection pipe 401; Scraper 4022 is located below the mounting ring 4021. The top of scraper 4022 is slidably connected to the bottom of the mounting ring 4021. Scraper 4022 can scrape along the inside of the arc-shaped plate 4023 under the drive of the mounting ring 4021, so that the colloid and impurities on the arc-shaped plate 4023 are concentrated together for easy cleaning. The arc-shaped plate 4023 is installed inside the injection tube 401. The bottom of the arc-shaped plate 4023 is in contact with the outside of the rotating filter element 403, and the outside of the scraper 4022 is in contact with the inside of the arc-shaped plate 4023.

[0036] When the rotary filter element 403 filters larger impurities in the raw material, the arc-shaped plate 4023 scrapes the surface of the rotary filter element 403, trapping colloidal impurities and particles inside the arc-shaped plate 4023. The colloids blocked in the holes of the rotary filter element 403 are flushed by the raw material when the rotation is reversed, causing a small amount of impurities to be washed out. This allows for further filtration through the primary ultrafiltration element 602, and finally into the modified ultrafiltration element 7 for separation. The scraper plate 4022, driven by the mounting ring 4021, concentrates the impurities inside the arc-shaped plate 4023 to prevent impurities from blocking the rotary filter element 403 again. This only performs preliminary screening of the raw material and maintains the filtration effect of the rotary filter element 403, further reducing the probability of clogging of the modified ultrafiltration membrane.

[0037] The specific workflow is as follows: During operation, the raw material enters from the separation mechanism 4, which performs preliminary screening to intercept large particulate impurities and colloidal impurities. The raw material then enters the coarse screening mechanism 6, and then enters the modified ultrafiltration cartridge 7. Finally, the raw material filtered by the modified ultrafiltration cartridge 7 is discharged. The modified ultrafiltration cartridge 7 adopts a multi-layer gradient pore structure design to precisely control the pore size distribution of the macroporous support layer, transition layer, and precision separation layer, so as to achieve graded interception of impurities of different molecular weights in the methylhydrazine aqueous solution. The feed liquid flows along the membrane surface in a cross-flow manner. Under the drive of the transmembrane pressure difference, two-phase separation occurs. The coarse screening mechanism 6 is set with three sets, which are used alternately. After a period of use, the coarse screening mechanism 6 is connected by the circulation mechanism 3. After a period of use, the coarse screening mechanism 6 and the circulation mechanism 3 are backwashed in a closed state. During use, the raw material enters the branch pipe 301 through the feed pipe 401, and then enters the primary ultrafiltration element 602. The rotating filter element 403 is inside the feed pipe 401, so that the raw material first passes through the rotating filter element 403 to pre-filter relatively large impurities. During the long feeding process, the rotating filter element 403 is in a slow rotating state. The arc plate 4023 scrapes the surface of the rotating filter element 403, trapping colloidal impurities and particles inside the arc plate 4023. When the colloid blocked in the holes of the rotating filter element 403 rotates to the opposite position, it is flushed by the raw material, so that a small amount of impurities are washed out. Then, it passes through the primary ultrafiltration element 602 for further filtration, and finally enters the modified ultrafiltration element 7 for separation. The cleaning component 402 centrally processes the impurities inside. When the primary ultrafiltration element 602 is in normal use, the branch pipe 301 connected to it keeps valve 302 closed, allowing the raw material to enter the primary ultrafiltration element 602 from the connecting end of the branch pipe 301, and then directly enter the modified ultrafiltration element 7. However, if the primary ultrafiltration element 602 has been used for an extended period or is clogged to a certain extent, it needs to be cleaned. In this case, the branch pipe 301 remains closed, and no more raw material enters. The raw material enters from another branch pipe 301 to continue operation. When residual raw material enters the modified ultrafiltration element 7, valve 302 opens, allowing the regulating pipe 30 at one end of the branch pipe 301 to open. 3. Rotate to inject cleaning agent into regulating pipe 303, then connect regulating pipe 303 to connecting component 304, so that cleaning agent circulates in the entire branch pipe 301, connecting pipe 305, connecting component 304 and special-shaped pipe 605. The primary ultrafiltration element 602 is flushed back by the built-in water pump, and finally the cleaning agent is discharged, waiting for the next use. By setting three sets of primary ultrafiltration elements 602, they are used alternately for preliminary filtration to reduce impurities in the raw materials and prevent the raw materials containing hard impurities from entering the modified ultrafiltration element 7, which can easily damage the modified ultrafiltration element 7. When some primary ultrafiltration cartridges 602 are no longer in use, the connecting assembly 304 is connected to the fixed pipe 603, so that the shaped pipe 605 is connected to the fixed pipe 603 and the branch pipe 301 connecting pipe 305. The control valve 606 closes the connection between the shaped pipe 605 and the annular pipe 607, so that the annular pipe 607 can continue to be used normally. Only the connection between the primary ultrafiltration cartridge 602 and the modified ultrafiltration cartridge 7 is cut off, separating the clean area from the working area.

[0038] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A methylhydrazine separation device, comprising a separation tank (1), characterized in that, Also includes: The isolation column (2) is set below the separation tank (1), the circulation mechanism (3) is installed outside the separation tank (1), the separation mechanism (4) is installed above the separation tank (1), and the coarse screening mechanism (6) is installed inside the separation tank (1). The separation mechanism (4) includes a feed pipe (401) installed above the separation tank (1), a cleaning assembly (402) disposed inside the feed pipe (401), and a rotating filter element (403) rotatably connected inside the feed pipe (401).

2. The methylhydrazine separation device according to claim 1, characterized in that: Also includes: A modified ultrafiltration element (7) is installed inside a separation tank (1). The upper part of the modified ultrafiltration element (7) is connected to the lower part of a coarse sieve mechanism (6). A jacket (5) is provided inside the separation tank (1), and the coarse sieve mechanism (6) is located inside the jacket (5).

3. The methylhydrazine separation device according to claim 1, characterized in that: The circulation mechanism (3) includes: Branch pipe (301), said branch pipe (301) is installed above the coarse screening mechanism (6); Valve (302), said valve (302) is installed above branch pipe (301); The regulating pipe (303) is installed at the end of the branch pipe (301) away from the separation mechanism (4).

4. The methylhydrazine separation device according to claim 3, characterized in that: The circulation mechanism (3) further includes: A connecting assembly (304) is mounted below the regulating pipe (303); A connecting pipe (305) is provided at one end of the connecting assembly (304), and the other end of the connecting pipe (305) is connected to the outside of the coarse screening mechanism (6). The track (306) is installed outside the separation bucket (1), and the connecting assembly (304) is slidably connected on the track (306).

5. The methylhydrazine separation device according to claim 1, characterized in that: The coarse screening mechanism (6) includes: A partition (601) is installed above the interior of the separation tank (1); Primary ultrafiltration element (602), which is installed inside the separation tank (1); A fixed tube (603) is installed above the primary ultrafiltration element (602).

6. The methylhydrazine separation apparatus according to claim 5, characterized in that: The coarse screening mechanism (6) also includes: A return pipe (604) is installed below the primary ultrafiltration element (602); A shaped tube (605) is disposed inside the interlayer (5), and the upper part of the shaped tube (605) is connected to the lower part of the return pipe (604).

7. The methylhydrazine separation apparatus according to claim 1, characterized in that: The coarse screening mechanism (6) also includes: Control valve (606), the control valve (606) is installed below the shaped tube (605), and the other end of the control valve (606) is connected to the top of the modified ultrafiltration element (7); An annular pipe (607) is disposed below the shaped pipe (605), and the lower part of the annular pipe (607) is connected to the outside of the modified ultrafiltration element (7).

8. The methylhydrazine separation device according to claim 4, characterized in that: The connection component (304) includes: A movable block (3041) is slidably connected on a track (306). A cavity (3042) is provided inside the movable block (3041), and a gear (3043) is rotatably connected inside the cavity (3042).

9. The methylhydrazine separation apparatus according to claim 8, characterized in that: The connection component (304) further includes: A bend (3044) is provided below the adjusting pipe (303). The other end of the bend (3044) is slidably connected to the inside of the moving pipe. A protrusion (3045) is provided on the side of the bend (3044) near the moving block (3041). The end of the bend (3044) near the moving block (3041) is inserted into the connecting pipe (305).

10. The methylhydrazine separation apparatus according to claim 1, characterized in that: The cleaning component (402) includes: Mounting ring (4021), wherein the mounting ring (4021) is disposed inside the injection tube (401); A scraper (4022) is disposed below the mounting ring (4021), and the top of the scraper (4022) is slidably connected to the bottom of the mounting ring (4021); An arc-shaped plate (4023) is installed inside the injection tube (401). The bottom of the arc-shaped plate (4023) is in contact with the outside of the rotating filter element (403). The outside of the scraper (4022) is in contact with the inside of the arc-shaped plate (4023).

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