A glycine mother liquor purification and separation device based on membrane treatment

Abstract

The invention discloses a glycine mother liquor purification and separation device based on membrane treatment, which relates to the technical field of impurity separation. The separation device comprises an installation substrate, a primary filtering mechanism, a secondary filtering mechanism, an impurity detection mechanism, a filter element adjustment mechanism and a purification device. The installation substrate is connected to the primary filtering mechanism, the installation substrate is connected to the secondary filtering mechanism, the installation substrate is connected to the impurity detection mechanism, the primary filtering mechanism is connected to the impurity detection mechanism, the secondary filtering mechanism is connected to the impurity detection mechanism, the secondary filtering mechanism is connected to the filter element adjustment mechanism, the secondary filtering mechanism is connected to the purification device, the impurity detection mechanism detects the impurity content of the mother liquor, the filter element adjustment mechanism is used to adjust the filtering stroke, and the purification device has a built-in material membrane.

Description

Technical Field

[0001] The invention relates to the technical field of impurity separation, in particular to a glycine mother liquor purification and separation device based on membrane treatment. Background Art

[0002] Glycine mother liquor is produced in the glycine production process. The mother liquor product has a high concentration in a saturated state, many impurities, a heavy color, and a large volume. It can be reused after being decolorized and adsorbed by activated carbon, but the effect is not good. Generally, evaporation treatment is energy-intensive, resulting in large product waste and high energy consumption costs.

[0003] During the mother liquor treatment process, there are many impurities such as particulate matter and suspended matter in the mother liquor. Failure to separate the mother liquor and impurities will affect the subsequent purification and use of the mother liquor. Conventional separation devices use filter screens to filter, which can filter the mother liquor, but the pores of the filter screen will make the filtration incomplete. When using a filter element for filtration, the filter element is fixed. No matter how much impurities are in the mother liquor, they will pass through the complete filter element. If there are fewer impurities, useless filtration will occur in the second half of the filter element, and the efficiency is low. Summary of the invention

[0004] The object of the present invention is to provide a glycine mother liquor purification and separation device based on membrane treatment to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The separation equipment includes an installation base plate, a primary filtering mechanism, a secondary filtering mechanism, an impurity detection mechanism, a filter element adjustment mechanism and a purification device. The installation base plate is connected to the primary filtering mechanism, the installation base plate is connected to the secondary filtering mechanism, the installation base plate is connected to the impurity detection mechanism, the primary filtering mechanism is connected to the impurity detection mechanism, the secondary filtering mechanism is connected to the impurity detection mechanism, the secondary filtering mechanism is connected to the filter element adjustment mechanism, the secondary filtering mechanism is connected to the purification device, the impurity detection mechanism detects the impurity content of the mother liquor, the filter element adjustment mechanism is used to adjust the filtering stroke, and the purification device has a built-in material membrane.

[0007] In the separation equipment, the device is used to perform preliminary filtering operations on the glycine mother liquor to filter out small particles and suspended matter contained in the mother liquor, ensuring safe and stable operation during subsequent material membrane separation and purification. The device is placed on the mounting substrate, and the particles and suspended matter in the mother liquor are initially filtered through the primary filtering mechanism. During the filtering process, some impurities may not be filtered out. The mother liquor after the initial filtration is detected by the impurity detection mechanism, and the interior of the secondary filtering mechanism is adjusted according to the impurity content. The mother liquor is filtered again through the secondary filtering mechanism so that the impurities in the mother liquor can be filtered out. The filter element adjustment mechanism assists the secondary filtration by adjusting the filter element, and the mother liquor after filtration is subjected to subsequent operations. The purification device is equipped with a material membrane for purifying the separated mother liquor.

[0008] The primary filtering mechanism includes a primary filtering tank, a primary filtering upper cover, a liquid outlet valve and a liquid inlet pipe. The primary filtering tank is placed on a mounting substrate. The primary filtering tank is an open cylindrical container. The opening of the primary filtering tank is tightly connected to the primary filtering upper cover. The liquid inlet pipe is fixedly connected to the primary filtering upper cover. A first liquid outlet is provided at the bottom of the primary filtering tank. A first liquid inlet is provided on the primary filtering upper cover. The first liquid inlet is communicated with the liquid inlet pipe. The primary filtering tank is connected to an impurity detection mechanism. The first liquid outlet is connected to the impurity detection mechanism. The liquid outlet valve is connected to the impurity detection mechanism. The primary filtering mechanism also includes a primary filtering screen and a metal mesh basket. The primary filtering screen is fixedly connected to the primary filtering tank. The metal mesh basket is fixedly connected to the primary filtering tank. A primary filtering cavity is provided in the primary filtering tank. The primary filtering screen is placed in the primary filtering cavity. The metal mesh basket is placed in the primary filtering cavity. The metal mesh basket is in a circular shape. The metal mesh basket is tightly connected to the inner wall of the primary filtering cavity. The primary filtering screen is in a bag shape. The opening of the primary filtering screen is tightly connected to the metal mesh basket.

[0009] In the primary filtration mechanism, the mechanism is used to perform the primary filtration on the mother liquor and filter out most of the impurities inside. The first liquid inlet of the primary filter cover is used for the entry of the mother liquor. A metal mesh basket and a primary filter screen are provided in the primary filter chamber. After the mother liquor passes through the primary filter screen, larger particulate impurities and suspended matter will be intercepted in the primary filter screen and cannot be discharged from the first liquid outlet with the mother liquor. The primary filter screen and the metal mesh basket are tightly connected. The metal mesh basket is in a circular ring shape. The metal mesh basket is tightly connected to the inner wall of the primary filter chamber. The primary filter screen is placed on the metal mesh basket to keep the top of the primary filter screen in an open state, and the size of the opening is just the same as the diameter in the primary filter chamber. In this way, In the process that the mother liquor enters the primary filter chamber from the first liquid inlet and then passes through the primary filter screen, the mother liquor will not leak and can be fully filtered. At the same time, the liquid outlet valve is connected to the impurity detection mechanism. After the liquid outlet valve is closed, the mother liquid is continuously injected into the primary filter chamber through the liquid inlet pipe. If it cannot be injected further in the later period, it proves that the primary filter tank is airtight and the mother liquor impurities can be filtered. After the device is started, the liquid outlet valve is closed, and the mother liquid is continuously injected into the primary filter chamber through the liquid inlet pipe. If it cannot be injected further in the later period, it proves that the tank body is airtight, otherwise it is not airtight. After the airtightness is detected, the liquid outlet valve is opened, and the mother liquid filtered by the primary filter screen enters the next mechanism along the pipe.

[0010] The secondary filtering mechanism includes a filter cartridge, which is placed on a mounting substrate. A secondary filter chamber is provided in the filter cartridge, a second liquid inlet and a second liquid outlet are provided on the filter cartridge, the second liquid inlet, the second liquid outlet and the secondary filter chamber are connected, the second liquid inlet is placed on the top of the secondary filter chamber, and the second liquid outlet is placed on the bottom of the secondary filter chamber. The filter cartridge is connected to an impurity detection mechanism, the second liquid inlet is connected to the impurity detection mechanism, the filter cartridge is connected to a purification device, the second liquid outlet is connected to the purification device, the filter cartridge is connected to a filter element adjustment mechanism, and the secondary filter chamber is connected to the filter element adjustment mechanism. The secondary filtering mechanism also includes a filter element and a filter element positioning rod. The filter cartridge is fixedly connected to the filter element, the filter cartridge is fixedly connected to the filter element positioning rod, the filter element and the filter element positioning rod are placed in the secondary filter chamber, the length of the filter element is the length of the secondary filter chamber, two filter element positioning rods are provided, the two filter element positioning rods are respectively fastened to the upper wall and the lower wall of the secondary filter chamber, and the two filter element positioning rods are respectively fastened to both ends of the filter element.

[0011] In the secondary filtration mechanism, the mechanism is used to perform secondary filtration on the mother liquor. The mother liquor enters the filter cartridge from the second liquid inlet, and a filter element is set at the center of the secondary filter chamber. The upper and lower ends of the filter element are just stuck at the second liquid inlet and the second liquid outlet. The filter element will become soft after encountering the solution. Therefore, two filter element positioning rods are used to fix the upper and lower sides of the filter element to prevent its position from shifting after filtering more solutions. After the device is started, the mother liquor that has undergone the initial filtration enters the secondary filter chamber from the second liquid inlet. Since the second liquid inlet is directly facing the filter element, the mother liquor directly enters the filter element for filtration. In this process, it will flow along the direction of the filter element. When the amount of mother liquor is large, the filtered mother liquor will seep out of the filter element, seep into the secondary filter chamber, and finally flow out through the second liquid outlet at the bottom, and then other subsequent operations will be performed.

[0012] The impurity detection mechanism includes a detection tank, a detection lamp and a photoresistor. The detection tank is placed on a mounting substrate. The detection tank and the detection lamp are fixedly connected. The detection tank and the photoresistor are fixedly connected. A detection cavity is arranged in the detection tank. The detection lamp and the wall of the detection cavity are tightly connected. The photoresistor and the wall of the detection cavity are tightly connected. The detection lamp and the photoresistor are placed on the wall opposite to the detection cavity. The connection line between the detection lamp and the photoresistor is perpendicular to the flow direction of the solution. The impurity detection mechanism also includes a first connecting pipe, a second connecting pipe and a first flow valve. The first liquid outlet is connected to the first connecting pipe, the first connecting pipe is connected to the detection tank, the second connecting pipe is connected to the detection tank, the first flow valve and the second connecting pipe are tightly connected. A detection inlet and a detection outlet are arranged on the detection tank. One end of the first connecting pipe is connected to the detection inlet, and one end of the first connecting pipe away from the detection inlet is connected to the first liquid outlet. The first connecting pipe is tightly connected to the liquid outlet valve, and one end of the second connecting pipe is connected to the detection outlet, and one end of the second connecting pipe away from the detection outlet is connected to the second liquid inlet.

[0013] In the impurity detection mechanism, the mechanism is used to detect the impurity content in the mother liquor after the initial filtration. The mother liquor after the initial filtration passes through the first liquid outlet to the first connecting pipe, and enters the detection tank from the first connecting pipe. The other end of the detection tank is connected to the second connecting pipe, and the second connecting pipe is provided with a first flow valve. When the mother liquor just enters the detection tank, the first flow valve is closed, and the second connecting pipe cannot allow the mother liquor to pass through. The mother liquor accumulates in the detection tank. After the detection tank is filled with mother liquid, the first flow valve is opened, the detection light is turned on, and the photoresistor is energized. The detection light and the photoresistor are respectively placed at opposite ends of the detection tank. The detection light directly shines on the photoresistor. Since there are small particles and suspended matter remaining in the mother liquor, after the first flow valve is opened, the mother liquor will flow out of the detection tank along the second connecting pipe. A large amount of mother liquor is always left in the detection tank to facilitate the detection of impurities. After the detection light is turned on, if there are no impurities, the light beam of the detection light can be fully irradiated on the photoresistor. At this time, the resistance of the photoresistor is the smallest. During the detection process, the mother liquor will flow toward the second connecting tube, and the direction of flow is perpendicular to the direction of the wiring harness. If the mother liquor contains particles and suspended impurities, the particles and suspended matter will move with the mother liquor when it flows. When passing the detection light, the wiring harness of the detection light will be blocked, and the light transmittance of the blocked wiring harness will be reduced, resulting in a decrease in the amount and intensity of light that finally shines on the photoresistor, and a larger resistance value of the photoresistor. The more particles and suspended matter there are, the larger the resistance value of the photoresistor. The impurity content in the mother liquor after the initial filtration is detected by detecting the resistance value of the photoresistor.

[0014] The filter element adjustment mechanism includes a length adjustment device, which is placed in the secondary filter chamber. The length adjustment device includes a fixed ring plate, a movable ring plate, a movable cutter, a rotating rod, a driving rod and a fixed rod. The fixed ring plate is tightly connected to the inner wall of the secondary filter chamber, and the movable ring plate is rotatably connected to the inside of the secondary filter chamber. The movable ring plate is provided with a plurality of arc grooves, and the number of the fixed rods is consistent with the number of the arc grooves. The fixed rod is movably connected to the movable ring plate, and one end of the fixed rod is tightly connected to the fixed ring plate, and the other end of the fixed rod is slidably connected to the arc groove. The number of the movable cutter, the rotating rod and the driving rod is consistent with the number of the fixed rods. One end of the rotating rod is tightly connected to the fixed ring plate, and the other end of the rotating rod is rotatably connected to the movable cutter. One end of the driving rod is rotatably connected to the movable ring plate, and the other end of the driving rod is rotatably connected to the movable cutter. The inner diameter of the fixed ring plate is smaller than that of the movable ring plate, and the inner diameter of the fixed ring plate is consistent with the diameter of the filter element. A section of the outer diameter of the movable ring plate is gear-shaped, and the movable ring plate is meshed with the output end of the motor.

[0015] In the filter element adjustment mechanism, the mechanism is used to adjust the filtering stroke of the secondary filtration of the mother liquid. The filtering stroke is changed by adjusting the length of the filter element, so that the mother liquid with less impurities passes through a shorter filtering stroke, and the mother liquid with more impurities passes through a longer filtering stroke, thereby improving the use efficiency of the filter element and reducing useless filtering of the filter element. The device cuts the filter element through a movable cutter, and the fixed ring plate provides support for the entire device. The movable ring plate is slidably connected to the wall of the secondary filter chamber and rotates after being driven by the motor to complete the cutting and return of the movable cutter. The rotating rod provides a rotating axis for the movable cutter, and the driving rod is used to push the movable cutter to extend. The device decides to start through the photoresistor in the impurity detection mechanism. Under normal circumstances, the movable cutter cuts the filter element. At this time, the filter element is cut into two sections, and the upper section is used to filter the mother liquor for the second time. When the resistance of the photoresistor becomes more than twice the original resistance, that is, when it detects that there are more impurities in the mother liquor, the motor starts and drives the movable ring plate to rotate, so that the drive rod is pulled back and the movable cutter returns. At this time, the entire filter element is circulated, the mother liquor is filtered for the second time, and then flows out through the second liquid outlet. In this way, the filtration stroke can be adjusted according to the impurity content in the mother liquor to reduce useless filtration.

[0016] The filter element adjustment mechanism also includes a flow guide device, which is connected to the length adjustment device. The flow guide device includes an inner flow guide tube and an outer connecting tube. The inner flow guide tube is connected to the length adjustment device. The inner flow guide tube is tightly connected to the fixed ring plate. A circular through hole is provided on the wall of the secondary filter chamber. The inner flow guide tube and the outer connecting tube are connected through the circular through hole. The end of the outer connecting tube away from the inner flow guide tube is connected to a pipe connected to the second liquid outlet.

[0017] In the filter element adjustment mechanism, there is also a guide device, which is used to provide guidance for the filtering space when the filter element is cut, so that when the upper section of the filter element is filtering, the filtered mother liquor can flow out and return to the normal process. The inner guide pipe and the fixed ring plate are tightly connected to connect the space of the upper section. Under normal circumstances, the movable cutter is used to cut the filter element. The filter element is cut into two sections. The mother liquor needs to be discharged after being filtered in the upper section of the filter element. The inner guide pipe and the outer connecting pipe are connected through the circular through hole on the wall of the secondary filter chamber. The mother liquor after filtration flows out through the inner guide pipe to the outer connecting pipe, and then flows through the outer connecting pipe to the pipeline connected to the second liquid outlet, and then enters the purification device together. A membrane is provided in the purification device to assist in purification.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: after the device is started, the liquid outlet valve is closed, and the mother liquid is continuously injected into the primary filter chamber through the liquid inlet pipe. If it cannot be injected later, it proves that the tank body is airtight, otherwise it is not airtight. After the airtightness is detected, the liquid outlet valve is opened, and the mother liquid filtered by the primary filter screen enters the impurity detection mechanism along the pipeline. When the mother liquid just enters the detection tank, the first flow valve is closed, and the second connecting pipe cannot allow the mother liquid to pass through. The mother liquid accumulates in the detection tank. After the detection tank is filled with mother liquid, the first flow valve is opened, the detection light is turned on, and the photoresistor is energized. If there are no impurities, the light beam of the detection light can be fully irradiated on the photoresistor. At this time, the resistance value of the photoresistor is the smallest. At this time, the movable cutter cuts the filter element, and the filter element is cut into two sections. Only the upper section can perform secondary filtration on the mother liquid. The filtered mother liquid will flow to and The next operation is carried out in the pipeline connected to the second liquid outlet; if the mother liquor contains particulate and suspended impurities, the particulate and suspended matter will move with the mother liquor when it flows, and the wiring harness of the detection lamp will be blocked when passing the detection lamp. The light transmittance of the blocked wiring harness part is reduced, resulting in the amount and intensity of light finally shining on the photoresistor becoming smaller, and the resistance of the photoresistor becoming larger. The more particulate and suspended matter there are, the larger the resistance of the photoresistor. When the resistance of the photoresistor increases by more than twice its original resistance, it is detected that there are more impurities in the mother liquor, and the motor starts to drive the movable ring plate to rotate, so that the drive rod is pulled back and the movable cutter is retracted. At this time, the filter element is fully circulated, and the mother liquor is filtered for the second time before flowing out through the second liquid outlet. In this way, the filtration stroke can be adjusted according to the content of impurities in the mother liquor to reduce useless filtration. Then they enter the purification device together, and a membrane is provided in the purification device to help purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a front view of the overall structure of the present invention;

[0021] Figure 3 It is a transverse cross-sectional view of the primary filtering mechanism of the present invention;

[0022] Figure 4 It is a transverse cross-sectional view of the secondary filtering mechanism of the present invention;

[0023] Figure 5 It is a longitudinal cross-sectional view of the impurity detection mechanism of the present invention;

[0024] Figure 6 This is an internal view of the secondary filtering mechanism of the present invention;

[0025] Figure 7 This is a diagram showing the initial state of the filter element adjustment mechanism of the present invention;

[0026] Figure 8 This is a driving state diagram of the filter element adjustment mechanism of the present invention.

[0027] In the figure: 1, mounting base plate; 2, primary filtering mechanism; 21, primary filter tank; 211, first liquid outlet; 212, primary filter chamber; 22, primary filter cover; 221, first liquid inlet; 23, liquid outlet valve; 24, liquid inlet pipe; 25, primary filter screen; 26, metal mesh basket; 3, secondary filtering mechanism; 31, filter cartridge; 311, secondary filter chamber; 312, second liquid inlet; 313, second liquid outlet; 32, filter element; 33, filter element positioning rod; 4, impurity detection mechanism; 41, detection tank; 411, detection Measuring cavity; 412, detection inlet; 413, detection outlet; 42, detection lamp; 43, photoresistor; 44, first connecting pipe; 45, second connecting pipe; 46, first flow valve; 5, filter element adjustment mechanism; 51, length adjustment device; 511, fixed ring plate; 512, movable ring plate; 5121, arc groove; 513, movable cutter; 514, rotating rod; 515, driving rod; 516, fixed rod; 52, flow guide device; 521, inner flow guide tube; 522, outer connecting pipe; 6, purification device. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example: Figure 1-Figure 8 As shown, the present invention provides a technical solution of a glycine mother liquor purification and separation device based on membrane treatment, the separation device comprises an installation substrate 1, a primary filtering mechanism 2, a secondary filtering mechanism 3, an impurity detection mechanism 4, a filter element adjustment mechanism 5 and a purification device 6, the installation substrate 1 is connected to the primary filtering mechanism 2, the installation substrate 1 is connected to the secondary filtering mechanism 3, the installation substrate 1 is connected to the impurity detection mechanism 4, the primary filtering mechanism 2 is connected to the impurity detection mechanism 4, the secondary filtering mechanism 3 is connected to the impurity detection mechanism 4, the secondary filtering mechanism 3 is connected to the filter element adjustment mechanism 5, the secondary filtering mechanism 3 is connected to the purification device 6, the impurity detection mechanism 4 detects the impurity content of the mother liquor, the filter element adjustment mechanism 5 is used to adjust the filtering stroke, and the purification device 6 has a built-in material membrane.

[0030] In the separation equipment, the device is used to perform preliminary filtering operations on the glycine mother liquor to filter out small particles and suspended matter contained in the mother liquor, ensuring safe and stable operation during subsequent material membrane separation and purification. The device is placed on the mounting substrate 1, and the particles and suspended matter in the mother liquor are initially filtered through the primary filtering mechanism 2. During the filtering process, some impurities may not be filtered out. The mother liquor after the initial filtration is detected by the impurity detection mechanism 4, and the interior of the secondary filtering mechanism 3 is adjusted according to the content of impurities. The mother liquor is filtered again by the secondary filtering mechanism 3 so that the impurities in the mother liquor can be filtered out. The filter element adjustment mechanism 5 assists the secondary filtration by adjusting the filter element, and the filtered mother liquor is subjected to subsequent operations. The purification device 6 is equipped with a material membrane for purifying the separated mother liquor.

[0031] The primary filtering mechanism 2 includes a primary filtering tank 21, a primary filtering upper cover 22, a liquid outlet valve 23 and a liquid inlet pipe 24. The primary filtering tank 21 is placed on the mounting substrate 1. The primary filtering tank 21 is an open cylindrical container. The opening of the primary filtering tank 21 is tightly connected to the primary filtering upper cover 22. The liquid inlet pipe 24 is fixedly connected to the primary filtering upper cover 22. A first liquid outlet 211 is provided at the bottom of the primary filtering tank 21. A first liquid inlet 221 is provided on the primary filtering upper cover 22. The first liquid inlet 221 is connected to the liquid inlet pipe 24. The primary filtering tank 21 is connected to the impurity detection mechanism 4. The first liquid outlet 211 and the impurity detection mechanism 4 is connected, the liquid outlet valve 23 is connected to the impurity detection mechanism 4, the primary filtering mechanism 2 also includes a primary filtering screen 25 and a metal mesh basket 26, the primary filtering screen 25 is fixedly connected to the primary filtering tank 21, the metal mesh basket 26 is fixedly connected to the primary filtering tank 21, a primary filtering chamber 212 is provided in the primary filtering tank 21, the primary filtering screen 25 is placed in the primary filtering chamber 212, the metal mesh basket 26 is placed in the primary filtering chamber 212, the metal mesh basket 26 is annular, the metal mesh basket 26 is tightly connected to the inner wall of the primary filtering chamber 212, the primary filtering screen 25 is bag-shaped, and the opening of the primary filtering screen 25 is tightly connected to the metal mesh basket 26.

[0032] In the primary filtering mechanism 2, the mechanism is used to perform the primary filtering of the mother liquor to filter out most of the impurities inside. The first liquid inlet 221 of the primary filter cover 22 is used for the entry of the mother liquor. A metal mesh basket 26 and a primary filter screen 25 are provided in the primary filter chamber 212. After the mother liquor passes through the primary filter screen 25, larger particulate impurities and suspended matter will be intercepted in the primary filter screen 25 and cannot be discharged from the first liquid outlet 211 with the mother liquor. The primary filter screen 25 and the metal mesh basket 26 are tightly connected. The metal mesh basket 26 is annular. The metal mesh basket 26 is tightly connected to the inner wall of the primary filter chamber 212. The primary filter screen 25 is mounted on the metal mesh basket 26 to keep the top of the primary filter screen 25 in an open state, and the size of the opening is just the same as the diameter in the primary filter chamber 212. In this way, in the process of the mother liquor entering the primary filter chamber 212 from the first liquid inlet 221 and then passing through the primary filter screen 25, the mother liquor will not be leaked and can be fully filtered. At the same time, the liquid outlet valve 23 is connected to the impurity detection mechanism 4. After the liquid outlet valve 23 is closed, the mother liquid is continuously injected into the primary filter chamber 212 through the liquid inlet pipe 24. If it cannot be injected in the later stage, it proves that the primary filter tank 21 is airtight and the mother liquor impurities can be filtered. After the device is started, the liquid outlet valve 23 is closed, and the mother liquid is continuously injected into the primary filter chamber 212 through the liquid inlet pipe 24. If it cannot be injected in the later stage, it proves that the tank body is airtight, otherwise it is not airtight. After the airtightness is detected, the liquid outlet valve 23 is opened, and the mother liquid filtered by the primary filter screen 25 enters the next mechanism along the pipe.

[0033] The secondary filtering mechanism 3 includes a filter cartridge 31, which is placed on the mounting substrate 1, a secondary filter chamber 311 is arranged in the filter cartridge 31, a second liquid inlet 312 and a second liquid outlet 313 are arranged on the filter cartridge 31, the second liquid inlet 312, the second liquid outlet 313 are connected to the secondary filter chamber 311, the second liquid inlet 312 is placed on the top of the secondary filter chamber 311, the second liquid outlet 313 is placed on the bottom of the secondary filter chamber 311, the filter cartridge 31 is connected to the impurity detection mechanism 4, the second liquid inlet 312 is connected to the impurity detection mechanism 4, the filter cartridge 31 is connected to the purification device 6, the second liquid outlet 313 is connected to the purification device 6, and the filter The cartridge 31 is connected to the filter element adjustment mechanism 5, the secondary filter chamber 311 is connected to the filter element adjustment mechanism 5, the secondary filtering mechanism 3 also includes a filter element 32 and a filter element positioning rod 33, the filter cartridge 31 is fixedly connected to the filter element 32, the filter cartridge 31 is fixedly connected to the filter element positioning rod 33, the filter element 32 and the filter element positioning rod 33 are placed in the secondary filter chamber 311, the length of the filter element 32 is the length of the secondary filter chamber 311, two filter element positioning rods 33 are provided, the two filter element positioning rods 33 are respectively fastened to the upper wall and the lower wall of the secondary filter chamber 311, and the two filter element positioning rods 33 are respectively fastened to both ends of the filter element 32.

[0034] In the secondary filtering mechanism 3, the mechanism is used to perform secondary filtering on the mother liquid. The mother liquid enters the filter cartridge 31 from the second liquid inlet 312. A filter element 32 is vertically arranged at the center of the secondary filter cavity 311. The upper and lower ends of the filter element 32 are just stuck at the second liquid inlet 312 and the second liquid outlet 313. The filter element 32 will become soft after encountering the solution. Therefore, two filter element positioning rods 33 are used to fix the upper and lower surfaces of the filter element 32 to prevent its position from shifting after filtering more solution. After the operation, the mother liquor that has undergone the initial filtration enters the secondary filter chamber 311 from the second liquid inlet 312. Since the second liquid inlet 312 is directly opposite to the filter element 32, the mother liquor directly enters the filter element 32 for filtration. In this process, it will flow along the direction of the filter element 32. When the amount of mother liquor is large, the filtered mother liquor will seep out of the filter element 32 and into the secondary filter chamber 311, and finally flow out through the second liquid outlet 313 at the bottom, and then other subsequent operations will be carried out.

[0035] The impurity detection mechanism 4 includes a detection tank 41, a detection lamp 42 and a photoresistor 43. The detection tank 41 is placed on the mounting substrate 1. The detection tank 41 and the detection lamp 42 are fixedly connected. The detection tank 41 and the photoresistor 43 are fixedly connected. A detection cavity 411 is arranged in the detection tank 41. The detection lamp 42 and the wall of the detection cavity 411 are tightly connected. The photoresistor 43 and the wall of the detection cavity 411 are tightly connected. The detection lamp 42 and the photoresistor 43 are placed on the opposite wall of the detection cavity 411. The straight line where the detection lamp 42 and the photoresistor 43 are located is perpendicular to the flow direction of the solution. The impurity detection mechanism 4 also includes a first connecting pipe 44, a second connecting pipe 45 and a first flow valve 46. The first liquid outlet 211 is connected to the first connecting pipe 44, the first connecting pipe 44 is connected to the detection tank 41, the second connecting pipe 45 is connected to the detection tank 41, the first flow valve 46 and the second connecting pipe 45 are tightly connected, a detection inlet 412 and a detection outlet 413 are provided on the detection tank 41, one end of the first connecting pipe 44 is connected to the detection inlet 412, the end of the first connecting pipe 44 away from the detection inlet 412 is connected to the first liquid outlet 211, the first connecting pipe 44 is tightly connected to the liquid outlet valve 23, one end of the second connecting pipe 45 is connected to the detection outlet 413, and the end of the second connecting pipe 45 away from the detection outlet 413 is connected to the second liquid inlet 312.

[0036] In the impurity detection mechanism 4, the mechanism is used to detect the impurity content in the mother liquor after the initial filtration. The mother liquor after the initial filtration passes through the first liquid outlet 211 to the first connecting pipe 44, and enters the detection tank 41 from the first connecting pipe 44. The other end of the detection tank 41 is connected to the second connecting pipe 45, and the second connecting pipe 45 is provided with a first flow valve 46. When the mother liquor just enters the detection tank 41, the first flow valve 46 is closed, and the second connecting pipe 45 cannot allow the mother liquor to pass through. The mother liquor accumulates in the detection tank 41. After the detection tank 41 is filled with mother liquor, the first flow valve 46 is turned on, the detection lamp 42 is turned on, and the photoresistor 43 is energized. The detection lamp 42 and the photoresistor 43 are respectively placed at opposite ends of the detection tank 41. The detection lamp 42 directly shines on the photoresistor 43. Since there are small particles and suspended matter remaining in the mother liquor, after the first flow valve 46 is turned on, the mother liquor will flow along the second connecting pipe 45. The pipe 45 flows out of the detection tank 41, and a large amount of mother liquor is always left in the detection tank 41 to facilitate the detection of impurities. After the detection lamp 42 is turned on, if there are no impurities, the light beam of the detection lamp 42 can be fully irradiated on the photoresistor 43. At this time, the resistance of the photoresistor 43 is the smallest. During the detection process, the mother liquor will flow toward the second connecting pipe 45, and the flow direction is perpendicular to the direction of the wire harness. If the mother liquor contains particles and suspended impurities, the particles and suspended matter will move with the mother liquor when it flows. When passing through the detection lamp 42, the wire harness of the detection lamp 42 will be blocked, and the light transmittance of the blocked wire harness portion will be reduced, resulting in the amount and intensity of light finally shining on the photoresistor 43 becoming smaller, and the resistance of the photoresistor 43 becoming larger. The more particles and suspended matter there are, the larger the resistance of the photoresistor 43. The impurity content in the mother liquor after the initial filtration is detected by detecting the resistance of the photoresistor 43.

[0037] The filter element adjustment mechanism 5 includes a length adjustment device 51, which is placed in the secondary filter chamber 311. The length adjustment device 51 includes a fixed ring plate 511, a movable ring plate 512, a movable cutter 513, a rotating rod 514, a driving rod 515 and a fixed rod 516. The fixed ring plate 511 is tightly connected to the inner wall of the secondary filter chamber 311, the movable ring plate 512 is rotatably connected to the inside of the secondary filter chamber 311, a plurality of arc grooves 5121 are provided on the movable ring plate 512, and the number of the fixed rods 516 and the arc grooves 5121 are the same. The fixed rod 516 is movably connected to the movable ring plate 512, and one end of the fixed rod 516 is tightly connected to the fixed ring plate 511. The other end of the fixed rod 516 is slidably connected to the arc groove 5121, the number of movable cutters 513, rotating rods 514, and driving rods 515 is consistent with the number of fixed rods 516, one end of the rotating rod 514 is tightly connected to the fixed ring plate 511, the other end of the rotating rod 514 is rotatably connected to the movable cutter 513, one end of the driving rod 515 is rotatably connected to the movable ring plate 512, and the other end of the driving rod 515 is rotatably connected to the movable cutter 513, the inner diameter of the fixed ring plate 511 is smaller than that of the movable ring plate 512, the inner diameter of the fixed ring plate 511 is consistent with the diameter of the filter element 32, a section of the outer diameter of the movable ring plate 512 is gear-shaped, and the movable ring plate 512 is meshed with the output end of the motor.

[0038] In the filter element adjustment mechanism 5, the mechanism is used to adjust the filtering stroke of the secondary filtration of the mother liquid. The filtering stroke is changed by adjusting the length of the filter element 32, so that the mother liquid with less impurities passes through a shorter filtering stroke, and the mother liquid with more impurities passes through a longer filtering stroke, thereby improving the use efficiency of the filter element 32 and reducing useless filtering of the filter element 32. The device cuts the filter element 32 through a movable cutter 513, and the fixed ring plate 511 provides support for the entire device. The movable ring plate 512 is slidably connected to the wall of the secondary filter chamber 311 and rotates after being driven by the motor to complete the cutting and returning of the movable cutter 513. The rotating rod 514 provides a rotating axis for the movable cutter 513, and the driving rod 515 is used to push the movable cutter 513. The knife 513 extends and retracts, and the device decides to start through the photoresistor 43 in the impurity detection mechanism 4. Under normal circumstances, the movable cutter 513 cuts the filter element 32. At this time, the filter element 32 is cut into two sections, and the upper section is used to perform secondary filtration on the mother liquor. When the resistance value of the photoresistor 43 becomes more than twice the original resistance value, that is, after detecting that there are more impurities in the mother liquor, the motor starts and drives the movable ring plate 512 to rotate, so that the driving rod 515 is pulled back and the movable cutter 513 is cut back. At this time, the filter element 32 is fully circulated, and the mother liquor is filtered twice and then flows out through the second liquid outlet 313. In this way, the filtration stroke can be adjusted according to the content of impurities in the mother liquor to reduce useless filtration.

[0039] The filter element adjustment mechanism 5 also includes a flow guide device 52, which is connected to the length adjustment device 51. The flow guide device 52 includes an inner flow guide tube 521 and an outer connecting tube 522. The inner flow guide tube 521 is connected to the length adjustment device 51. The inner flow guide tube 521 is fastened to the fixed ring plate 511. A circular through hole is provided on the wall of the secondary filter chamber 311. The inner flow guide tube 521 and the outer connecting tube 522 are connected through the circular through hole. The outer connecting tube 522 is connected to a pipe connected to the second liquid outlet 313 at one end away from the inner flow guide tube 521.

[0040] In the filter element adjustment mechanism 5, there is also a guide device 52, which is used to provide guidance for the filtering space when the filter element 32 is cut, so that when the upper section of the filter element 32 is filtering, the filtered mother liquor can flow out and return to the normal process. The inner guide pipe 521 and the fixed ring plate 511 are tightly connected to connect the space of the upper section. Under normal circumstances, the movable cutter 513 is used to cut the filter element 32. The filter element 32 is cut into two sections. The mother liquor needs to be discharged after being filtered in the upper section of the filter element 32. The inner guide pipe 521 and the outer connecting pipe 522 are connected through the circular through hole on the wall of the secondary filter chamber 311. The mother liquor after filtration flows out to the outer connecting pipe 522 through the inner guide pipe 521, and then flows to the pipeline connected to the second liquid outlet 313 through the outer connecting pipe 522, and then enters the purification device together. The purification device is provided with a membrane to assist purification.

[0041] Working principle of the present invention: After the device is started, the liquid outlet valve 23 is closed, and the mother liquid is continuously injected into the primary filter chamber 212 through the liquid inlet pipe 24. If it cannot be injected later, it proves that the tank body is airtight, otherwise it is not airtight. After the airtightness is detected, the liquid outlet valve 23 is opened, and the mother liquid filtered by the primary filter screen 25 enters the impurity detection mechanism 4 along the pipeline. When the mother liquid just enters the detection tank 41, the first flow valve 46 is closed, and the second connecting pipe 45 cannot let the mother liquid pass. The mother liquid is The mother liquid accumulates in the detection tank 41. After the detection tank 41 is filled with mother liquid, the first flow valve 46 is opened, the detection lamp 42 is turned on, and the photoresistor 43 is energized. If there are no impurities, the light beam of the detection lamp 42 can be fully irradiated on the photoresistor 43. At this time, the resistance value of the photoresistor 43 is the smallest. At this time, the movable cutter 513 cuts the filter element 32. The filter element 32 is cut into two sections. Only the upper section can perform secondary filtration on the mother liquid. The filtered mother liquid will flow through the guide device 52. The next operation is carried out in the pipeline connected to the second liquid outlet 313; if the mother liquor contains particles and suspended impurities, the particles and suspended matter will move with the mother liquor when it flows. When passing through the detection lamp 42, the wiring harness of the detection lamp 42 will be blocked, and the light transmittance of the blocked wiring harness part will be reduced, resulting in the amount and intensity of light finally shining on the photoresistor 43 becoming smaller, and the resistance of the photoresistor 43 becoming larger. The more particles and suspended matter there are, the larger the resistance of the photoresistor 43 is. When the resistance of the photoresistor 43 increases by more than twice the original resistance, it is detected that there are more impurities in the mother liquor. The motor starts and drives the movable ring plate 512 to rotate, so that the drive rod 515 is pulled back and the movable cutter 513 is cut back. At this time, the filter element 32 is fully circulated, and the mother liquor is filtered twice, and then flows out through the second liquid outlet 313. In this way, the filtering stroke can be adjusted according to the content of impurities in the mother liquor to reduce useless filtering. Then they enter the purification device together, and a membrane is provided in the purification device to help purification.

[0042] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A glycine mother liquor purification and separation device based on membrane treatment, characterized in that: The separation device comprises a mounting substrate (1), a primary filtering mechanism (2), a secondary filtering mechanism (3), an impurity detection mechanism (4), a filter element adjustment mechanism (5) and a purification device (6), wherein the mounting substrate (1) is connected to the primary filtering mechanism (2), the mounting substrate (1) is connected to the secondary filtering mechanism (3), the mounting substrate (1) is connected to the impurity detection mechanism (4), the primary filtering mechanism (2) is connected to the impurity detection mechanism (4), the secondary filtering mechanism (3) is connected to the impurity detection mechanism (4), the secondary filtering mechanism (3) is connected to the filter element adjustment mechanism (5), the secondary filtering mechanism (3) is connected to the purification device (6), the impurity detection mechanism (4) detects the impurity content of the mother liquor, the filter element adjustment mechanism (5) is used to adjust the filtering stroke, and the purification device (6) has a built-in material membrane; The secondary filtering mechanism (3) comprises a filter cartridge (31), the filter cartridge (31) being placed on a mounting substrate (1), a secondary filter chamber (311) being provided in the filter cartridge (31), a second liquid inlet (312) and a second liquid outlet (313) being provided on the filter cartridge (31), the second liquid inlet (312), the second liquid outlet (313) and the secondary filter chamber (311) being in communication, the second liquid inlet (312) being placed on the top of the secondary filter chamber (311), the second liquid outlet (313) being placed on the bottom of the secondary filter chamber (311), the filter cartridge (31) being connected to an impurity detection mechanism (4), the second liquid inlet (312) being connected to the impurity detection mechanism (4), the filter cartridge (31) being connected to a purification device (6), the second liquid outlet (313) being connected to the purification device (6), the filter cartridge (31) being connected to a filter element adjustment mechanism (5), and the secondary filter chamber (311) being connected to the filter element adjustment mechanism (5); The secondary filtering mechanism (3) further comprises a filter element (32) and a filter element positioning rod (33); the filter cartridge (31) and the filter element (32) are fixedly connected; the filter cartridge (31) and the filter element positioning rod (33) are fixedly connected; the filter element (32) and the filter element positioning rod (33) are placed in the secondary filter cavity (311); the length of the filter element (32) is the same as the length of the secondary filter cavity (311); two filter element positioning rods (33) are provided; the two filter element positioning rods (33) are respectively fastened to the upper wall and the lower wall of the secondary filter cavity (311); and the two filter element positioning rods (33) are respectively fastened to the two ends of the filter element (32); The filter element adjustment mechanism (5) comprises a length adjustment device (51), the length adjustment device (51) being disposed in the secondary filter chamber (311), the length adjustment device (51) comprising a fixed ring plate (511), a movable ring plate (512), a movable cutter (513), a rotating rod (514), a driving rod (515) and a fixed rod (516), the fixed ring plate (511) being tightly connected to the inner wall of the secondary filter chamber (311), the movable ring plate (512) being rotatably connected to the inside of the secondary filter chamber (311), the movable ring plate (512) being provided with a plurality of arc grooves (5121), the number of the fixed rods (516) being the same as the number of the arc grooves (5121), the fixed rod (516) being movably connected to the movable ring plate (512), and one end of the fixed rod (516) being tightly connected to the fixed ring plate (511). , the other end of the fixed rod (516) is slidably connected to the arc groove (5121), the number of the movable cutter (513), the rotating rod (514), and the driving rod (515) is the same as the number of the fixed rod (516), one end of the rotating rod (514) is tightly connected to the fixed ring plate (511), the other end of the rotating rod (514) is rotatably connected to the movable cutter (513), one end of the driving rod (515) is rotatably connected to the movable ring plate (512), and the other end of the driving rod (515) is rotatably connected to the movable cutter (513), the inner diameter of the fixed ring plate (511) is smaller than that of the movable ring plate (512), the inner diameter of the fixed ring plate (511) is the same as the diameter of the filter element (32), a section of the outer diameter of the movable ring plate (512) is gear-shaped, and the movable ring plate (512) is meshed with the output end of the motor; The filter element adjustment mechanism (5) further comprises a flow guide device (52), the flow guide device (52) being connected to the length adjustment device (51), the flow guide device (52) comprising an inner flow guide tube (521) and an outer connecting tube (522), the inner flow guide tube (521) being connected to the length adjustment device (51), the inner flow guide tube (521) being tightly connected to the fixed ring plate (511), a circular through hole being provided on the wall surface of the secondary filter cavity (311), the inner flow guide tube (521) being connected to the outer connecting tube (522) via the circular through hole, and an end of the outer connecting tube (522) away from the inner flow guide tube (521) being connected to a pipeline connected to the second liquid outlet (313).

2. The glycine mother liquor purification and separation device based on membrane treatment according to claim 1, characterized in that: The impurity detection mechanism (4) comprises a detection tank (41), a detection lamp (42) and a photoresistor (43); the detection tank (41) is placed on a mounting substrate (1); the detection tank (41) and the detection lamp (42) are fixedly connected; the detection tank (41) and the photoresistor (43) are fixedly connected; a detection cavity (411) is provided in the detection tank (41); the detection lamp (42) and the wall surface of the detection cavity (411) are firmly connected; the photoresistor (43) and the wall surface of the detection cavity (411) are firmly connected; the detection lamp (42) and the photoresistor (43) are placed on the wall surface opposite to the detection cavity (411); and the straight line where the detection lamp (42) and the photoresistor (43) are located is perpendicular to the flow direction of the solution.

3. The glycine mother liquor purification and separation equipment based on membrane treatment according to claim 1, characterized in that: The primary filtering mechanism (2) comprises a primary filtering tank (21), a primary filtering upper cover (22), a liquid outlet valve (23) and a liquid inlet pipe (24); the primary filtering tank (21) is placed on a mounting base plate (1); the primary filtering tank (21) is an open cylindrical container; the open portion of the primary filtering tank (21) is tightly connected to the primary filtering upper cover (22); the liquid inlet pipe (24) is fixedly connected to the primary filtering upper cover (22); a first liquid outlet (211) is provided at the bottom of the primary filtering tank (21); a first liquid inlet (221) is provided on the primary filtering upper cover (22); the first liquid inlet (221) is connected to the liquid inlet pipe (24); the primary filtering tank (21) is connected to an impurity detection mechanism (4); the first liquid outlet (211) is connected to the impurity detection mechanism (4); and the liquid outlet valve (23) is connected to the impurity detection mechanism (4).

4. The glycine mother liquor purification and separation equipment based on membrane treatment according to claim 1, characterized in that: The primary filtering mechanism (2) further comprises a primary filtering screen (25) and a metal mesh basket (26); the primary filtering screen (25) is fixedly connected to the primary filtering tank (21); the metal mesh basket (26) is fixedly connected to the primary filtering tank (21); a primary filtering cavity (212) is provided in the primary filtering tank (21); the primary filtering screen (25) is placed in the primary filtering cavity (212); the metal mesh basket (26) is placed in the primary filtering cavity (212); the metal mesh basket (26) is in a circular shape; the metal mesh basket (26) is tightly connected to the inner wall of the primary filtering cavity (212); the primary filtering screen (25) is in a bag shape; the primary filtering screen (25) is tightly connected to the metal mesh basket (26) at its open end.

5. The glycine mother liquor purification and separation equipment based on membrane treatment according to claim 3, characterized in that: The impurity detection mechanism (4) further comprises a first connecting pipe (44), a second connecting pipe (45) and a first flow valve (46); the first liquid outlet (211) is connected to the first connecting pipe (44); the first connecting pipe (44) is connected to the detection tank (41); the second connecting pipe (45) is connected to the detection tank (41); the first flow valve (46) and the second connecting pipe (45) are tightly connected; a detection inlet (412) and a detection outlet (413) are provided on the detection tank (41); one end of the first connecting pipe (44) is connected to the detection inlet (412); one end of the first connecting pipe (44) away from the detection inlet (412) is connected to the first liquid outlet (211); the first connecting pipe (44) is tightly connected to the liquid outlet valve (23); one end of the second connecting pipe (45) is connected to the detection outlet (413); and one end of the second connecting pipe (45) away from the detection outlet (413) is connected to the second liquid inlet (312).

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