A wastewater treatment device for pharmaceutical intermediate production

Abstract

The invention relates to the technical field of wastewater treatment devices, and specifically discloses a wastewater treatment device for pharmaceutical intermediate production, including an air flotation tank, a scraper assembly, a scraper propulsion mechanism, and a slag discharge trough. The scraper assembly includes: a scraper unit, a plurality of scraper units are arranged in sequence from left to right, each scraper unit includes a bracket installed on the scraper propulsion mechanism, a scraper assembled below the bracket for left and right movement, a spring connected between the scraper and the bracket, and a storage chamber is formed between two adjacent scrapers; a linkage unit, the linkage unit is connected between two adjacent scraper units, each linkage unit includes a trigger rod, the left end of the trigger rod is installed on the scraper on the left, and the right end of the trigger rod can be inserted into the scraper on the right; the main scraper unit includes a fixed scraper, and the auxiliary scraper unit includes a telescopic scraper. The wastewater treatment device for pharmaceutical intermediate production can automatically adjust the position of the scraper according to the collection of slag to avoid overflow caused by overloading of a single scraper.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment devices, and in particular to a wastewater treatment device for the production of pharmaceutical intermediates. Background Art

[0002] Pharmaceutical intermediates refer to intermediate chemicals made in the process of chemical drug synthesis and are fine chemical products. They play an important role in the pharmaceutical industry chain, connecting the basic chemical raw material manufacturing industry and the chemical drug API and preparation manufacturing industry. The production process of pharmaceutical intermediates is a complex and strictly controlled process involving multiple key steps and quality control measures. During the process, wastewater with high organic content, complex composition and poor biodegradability will be produced, which requires wastewater treatment to reduce the impact on the environment. The flotation machine is one of the wastewater treatment devices commonly used for wastewater produced by pharmaceutical intermediates. Its working principle is to inject a large number of tiny bubbles into the wastewater so that suspended matter, grease and other pollutants with a smaller specific gravity in the wastewater can attach to the bubbles, and float to the water surface with the bubbles to form scum, and then the scum is scraped off the water surface by a scraper, thereby achieving solid-liquid separation.

[0003] A Chinese patent document with authorization announcement number CN214936195U discloses a scraper machine and an air flotation machine thereof, which can adjust the depth of the scraper extending into the flotation tank through a vertical lifting frame according to the liquid level of sewage in the flotation tank to adapt to the liquid level of sewage, thereby ensuring the scraping efficiency and avoiding excessive sewage from being discharged into the slag discharge trough along with the slag, resulting in excessive sludge moisture.

[0004] However, during the operation of the scraper machine and its flotation machine in the prior art, when the scum layer generated in the flotation tank is thick, as the scraper moves toward the slag discharge trough, the scum collected at the front end of the scraper will gradually increase, and even overflow from the lower end of the scraper. The pollutants in the overflowing scum will sink back into the wastewater, reducing the flotation efficiency. Summary of the invention

[0005] The invention provides a wastewater treatment device for pharmaceutical intermediate production, aiming to solve the problem that when the scum layer generated in the flotation tank of the scraper machine and its flotation machine in the related art is thick, the scum may overflow from the lower end of the scraper.

[0006] The present invention provides a wastewater treatment device for pharmaceutical intermediate production using the following technical solutions:

[0007] A wastewater treatment device for the production of pharmaceutical intermediates, comprising an air flotation tank, wherein a scraper assembly is arranged in the air flotation tank, a scraper propulsion mechanism for driving the scraper assembly to propel from the left end to the right end of the air flotation tank, and a slag discharge trough located at the right end of the air flotation tank, wherein the scraper assembly comprises: a scraper unit, wherein a plurality of the scraper units are arranged in sequence from left to right, wherein each of the scraper units comprises a bracket mounted on the scraper propulsion mechanism, a scraper mounted below the bracket for left-right movement, and a spring connected between the scraper and the bracket, wherein a storage chamber for accommodating slag is formed between two adjacent scrapers; and a linkage unit, wherein the linkage unit is connected to the adjacent two scrapers. Between the scraper units, each linkage unit includes a trigger rod, the left end of each trigger rod is installed on the scraper on the left side to move left and right with the scraper on the left side, and the right end of each trigger rod passes through the bracket on the right side and can be inserted into the scraper on the right side to limit the scraper on the right side from moving downward; the scraper unit at the left end is set as the main scraper unit, and the other scraper units are set as auxiliary scraper units, the main scraper unit includes a fixed scraper, and the auxiliary scraper unit includes a telescopic scraper, the trigger rod inserted into the telescopic scraper moves to the left with the scraper on the left side until it is detached, and the telescopic scraper can extend downward to cover the storage chamber.

[0008] By adopting the above technical solution, the scraper assembly is set as a main scraper unit, a plurality of spare auxiliary scraper units that can take over the work of the main scraper unit, and a linkage unit connected between two adjacent scraper units. The fixed scraper of the main scraper unit is responsible for the main scum collection work. When the weight of the scum collected by the fixed scraper of the main scraper unit reaches a certain value, that is, close to the load limit, the linkage unit is triggered, so that the telescopic scraper of the first auxiliary scraper unit enters the extension state and covers the storage chamber to take over the fixed scraper to collect the scum and share part of the load. When the weight of the scum collected by the telescopic scraper of the first auxiliary scraper unit is close to the load limit, the second auxiliary scraper unit can take over the work of the first auxiliary scraper unit. In this way, continuous collection of scum is allowed, and even in the case of a thick scum layer and a large amount of scum, a high flotation efficiency can be maintained, and overflow caused by overloading of a single scraper can be avoided. The position of the scraper can be automatically adjusted according to the weight of the scum and the collection situation, which has good flexibility and strong adaptability, improves the efficiency and reliability of scum collection, and also reduces the loss caused by scum overflow.

[0009] Furthermore, the telescopic scraper includes a shell and a plate body assembled in the shell for vertical movement, the upper end of the plate body has a limiting portion, and the lower end of the shell has an anti-slip stopper for preventing the limiting portion from moving downward.

[0010] Furthermore, the plate body is provided with a slot for inserting the trigger rod, and the right end of the trigger rod has an inclined surface that slopes downward from right to left.

[0011] By adopting the above technical solution, the inclined surface arranged at the right end of the trigger rod can serve as a guide to help the trigger rod to be smoothly inserted into the card slot, thereby reducing the deviation and misalignment during the plug-in process.

[0012] Furthermore, the telescopic scraper is provided with an extending shaft, the scraper propulsion mechanism is a U-shaped conveyor belt, the conveyor belt has an upward stroke and a downward stroke, and the side wall of the flotation tank is provided with a reset block at the upward stroke of the conveyor belt, and the reset block has a guiding inclined surface for pushing the extending shaft downward to reset the telescopic scraper.

[0013] Furthermore, each linkage unit also includes a driving rod corresponding to the trigger rod one by one, the left end of the trigger rod has a slide groove extending up and down, the left end of the driving rod passes through the left bracket and is fixed to the scraper on the left, and the right end of the driving rod is installed in the slide groove through the driving shaft.

[0014] By adopting the above technical solution, the setting of the driving shaft and the slide groove enables the trigger rod and the driving rod to rotate and bend relative to each other, so that the linkage unit has a certain flexibility in the length direction of the conveyor belt, and can smoothly pass through the turning point of the U-shaped conveyor belt to avoid getting stuck.

[0015] Furthermore, the bracket includes a connecting part, a top plate and a mounting part which are distributed in sequence from top to bottom, the connecting part is fixed on the scraper propulsion mechanism, the top plate is fixedly connected to the connecting part, the relative surfaces of two adjacent top plates are abutted, the mounting part has a mounting groove opening facing downward for installing a spring and a scraper, the mounting part of the main scraper unit is fixedly mounted on the lower surface of the top plate, and the mounting part of the auxiliary scraper unit is movably mounted left and right on the lower surface of the top plate.

[0016] Furthermore, each linkage unit also includes rotating arms arranged in pairs and hinged to each other, hinge shafts arranged at the hinges of the paired rotating arms, and torsion springs connected between the paired rotating arms. The paired rotating arms are rotatably mounted on the mounting portion at one end away from each other. The torsion springs are used to apply elastic force to the paired rotating arms so that the paired rotating arms are opened into a straight line. A trigger block is provided on the side wall of the flotation tank near the slag discharge trough. The trigger block has a guiding inclined surface for pushing the hinge shaft downward to allow the paired rotating arms to be retracted into a V-shape.

[0017] By adopting the above technical solution, when the collected scum is pushed to the scum discharge trough, the scraper on the right is driven close to the scraper on the left, and the storage chamber space between the two scrapers is reduced, so as to apply pressure to the scum and flotation liquid collected in the storage chamber, so that the flotation liquid is squeezed out of the storage chamber, so that the scum and the flotation liquid can be effectively separated, reducing the consumption and loss of the flotation agent and improving the flotation efficiency.

[0018] Furthermore, each linkage unit also includes a filter plate, a gear, a rack, a push rod, and a connecting rod. The filter plate is rotatably mounted on the lower end of the left scraper plate, the gear is mounted on the filter plate, the rack moves up and down and is assembled on the left scraper plate and meshes with the gear, the upper end of the connecting rod is rotatably mounted on the mounting portion on the left, the lower end of the connecting rod has a limiting groove extending along the length direction of the connecting rod, the upper end of the rack is provided with a limiting shaft installed in the limiting groove, the right end of the push rod is fixed on the mounting portion on the right, and the left end of the push rod is used to push the connecting rod.

[0019] By adopting the above technical solution, when the scraper on the right side approaches the scraper on the left side, the left end of the push rod can push the connecting rod to make the connecting rod rotate around the upper end of the connecting rod, thereby driving the rack to move upward, and the rack drives the filter plate to rotate around the gear through the meshing driving gear. The filter plate can rotate toward the storage chamber to assist the scraper to push the scum into the scum discharge trough to prevent the scum from overflowing, and further squeeze and filter the scum, thereby effectively removing the flotation liquid in the scum and improving the flotation efficiency.

[0020] The beneficial effect of a wastewater treatment device for the production of pharmaceutical intermediates provided by the present invention is that the scraper assembly is set as a main scraper unit, a plurality of spare auxiliary scraper units that can take over the work of the main scraper unit, and a linkage unit connected between two adjacent scraper units, and the fixed scraper of the main scraper unit is responsible for the main scum collection work. When the weight of the scum collected by the fixed scraper of the main scraper unit reaches a certain value, that is, close to the load limit, the linkage unit is triggered, so that the telescopic scraper of the first auxiliary scraper unit enters an extended state and covers the storage chamber to take over the fixed scraper to collect the scum and share part of the load. When the weight of the scum collected by the telescopic scraper of the first auxiliary scraper unit is close to the load limit, the second auxiliary scraper unit can take over the work of the first auxiliary scraper unit. In this way, the scum is allowed to be collected continuously, and even when the scum layer is thick and the scum amount is large, a high flotation efficiency can be maintained, avoiding overflow of a single scraper due to overloading, and the position of the scraper can be automatically adjusted according to the weight of the scum and the collection situation. It has good flexibility and strong adaptability, which improves the efficiency and reliability of scum collection, and also reduces the losses caused by scum overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the external structure of the wastewater treatment device for the production of pharmaceutical intermediates of the present invention.

[0022] Figure 2 It is a cross-sectional view of the flotation tank of the wastewater treatment device for the production of pharmaceutical intermediates of the present invention.

[0023] Figure 3 It is a first structural schematic diagram of the scraper assembly of the wastewater treatment device for the production of pharmaceutical intermediates of the present invention.

[0024] Figure 4 It is a second structural schematic diagram of the scraper assembly of the wastewater treatment device for the production of pharmaceutical intermediates of the present invention.

[0025] Figure 5 It is a cross-sectional view of a scraper assembly of a wastewater treatment device for producing pharmaceutical intermediates according to the present invention.

[0026] Figure 6 It is a schematic structural diagram of a plate body of a wastewater treatment device for producing pharmaceutical intermediates according to the present invention.

[0027] Reference numerals:

[0028] 10, air flotation tank; 110, reset block; 120, trigger block; 20, scraper assembly; 30, scraper propulsion mechanism; 40, slag trough; 50, scraper unit; 501, main scraper unit; 502, auxiliary scraper unit; 510, bracket; 511, connecting part; 512, top plate; 513, mounting part; 520, scraper; 530, spring; 550, fixed scraper; 560, telescopic scraper; 5 61. housing; 5610. anti-drop block; 562. plate body; 5621. slot; 5622. extension shaft; 60. linkage unit; 610. trigger lever; 611. slide slot; 620. drive lever; 621. drive shaft; 630. rotating arm; 631. hinge shaft; 640. filter plate; 650. gear; 660. rack; 661. limit shaft; 670. push rod; 680. connecting rod. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] like Figure 1 and Figure 2 As shown, and refer to Figure 1In the orientation shown, an embodiment of the wastewater treatment device for the production of pharmaceutical intermediates according to the present invention includes a flotation tank 10, a scraper assembly 20, a scraper propulsion mechanism 30, and a slag discharge trough 40. The flotation tank 10 is generally rectangular in shape. The scraper propulsion mechanism 30 is a conveyor belt in a shape of a rectangle with a loop. Two conveyor belts are installed opposite to each other front and back above the flotation tank 10, and two scraper assemblies 20 are respectively installed on the upper and lower sides of the conveyor belt to alternately collect the floating slag. The slag discharge trough 40 is arranged at the right end position inside the flotation tank 10 for collecting and discharging the floating slag. Specifically, the conveyor belt has an upward travel and a downward travel. During the downward travel, the scraper propulsion mechanism 30 drives the scraper assembly 20 to advance from the left end to the right end of the flotation tank 10. The scraper assembly 20 moves along the liquid surface and pushes the collected floating slag towards the slag discharge trough 40. During the upward travel, the scraper propulsion mechanism 30 drives the scraper assembly 20 to return from the right end to the left end of the flotation tank 10, and the scraper assembly 20 moves above the liquid surface to prepare for the next collection cycle.

[0031] As Figure 3 shown, the scraper assembly 20 includes a scraper unit 50 and a linkage unit 60. Four scraper units 50 are arranged in sequence from left to right, and the linkage unit 60 is connected between two adjacent scraper units 50.

[0032] As Figures 3 to 6 shown, each scraper unit 50 includes a bracket 510, a scraper 520, and a spring 530. The bracket 510 is installed on the conveyor belt. The bracket 510 includes a connecting portion 511, a top plate 512, and a mounting portion 513 that are distributed in sequence from top to bottom. The connecting portion 511 is fixed on the conveyor belt, the top plate 512 is fixedly connected to the connecting portion 511, the opposite surfaces of two adjacent top plates 512 are in contact with each other, and the mounting portion 513 is installed on the lower surface of the top plate 512. The mounting portion 513 has a mounting groove with an opening facing downwards for installing the spring 530 and the scraper 520. The upper end of the scraper 520 is movably assembled left and right in the mounting groove of the mounting portion 513, and the spring 530 is connected between the left side wall of the scraper 520 and the mounting groove. The right side wall of the scraper 520 is used to push and collect the floating slag. The spring 530 is used to detect the weight of the floating slag collected by the scraper 520. A storage chamber for accommodating the floating slag is formed between two adjacent scrapers 520.

[0033] The scraper unit 50 at the left end is set as the main scraper unit 501, which is responsible for the main scum collection work, and the other scraper units 50 are set as auxiliary scraper units 502 as spares, which can take over the work of the main scraper unit 501. The mounting portion 513 of the main scraper unit 501 is fixedly assembled on the lower surface of the top plate 512, and the mounting portion 513 of the auxiliary scraper unit 502 is movably assembled on the lower surface of the top plate 512. The main scraper unit 501 includes a fixed scraper 550, and the auxiliary scraper unit 502 includes a telescopic scraper 560. The telescopic scraper 560 includes a shell 561 and a plate body 562 that is movably assembled in the shell 561 up and down, and the upper end of the plate body 562 has a limit portion, and the lower end of the shell 561 has an anti-slip stopper 5610 for blocking the limit portion from moving downward. A plurality of left-right extending slots 5621 are opened in the front and rear directions of the plate body 562, and the front and rear ends of the plate body 562 are respectively fixed with extension shafts 5622.

[0034] like Figures 2 to 6 As shown, each linkage unit 60 includes a trigger rod 610 , a driving rod 620 , a rotating arm 630 , a filter plate 640 , a gear 650 , a rack 660 , a push rod 670 and a connecting rod 680 .

[0035] The left end of the trigger rod 610 has a slide groove 611 extending up and down. The left end of the driving rod 620 passes through the bracket 510 on the left and is fixed on the scraper 520 on the left to move left and right with the scraper 520 on the left. The right end of the driving rod 620 is installed in the slide groove 611 through the driving shaft 621 to drive the trigger rod 610 to move left and right with the scraper 520 on the left. The setting of the driving shaft 621 and the slide groove 611 allows the trigger rod 610 and the driving rod 620 to rotate and bend relative to each other, so that the linkage unit 60 has a certain flexibility in the length direction of the conveyor belt, and can smoothly pass through the turning point of the U-shaped conveyor belt to avoid being stuck. The right end of the trigger rod 610 has an inclined surface inclined downward from right to left, which is used to insert the slot 5621 of the telescopic scraper 560 on the right to limit the downward movement of the plate body 562 on the right, so that the telescopic scraper 560 on the right remains in a shortened state. The inclined surface provided at the right end of the trigger rod 610 can serve as a guide to help the trigger rod 610 to be smoothly inserted into the slot 5621, thereby reducing deviation and misalignment during the plugging process.

[0036] It should be noted that when the weight of the scum collected by the scraper unit 50 on the left reaches a certain value, the spring 530 of the scraper unit 50 on the left is compressed and drives the trigger rod 610 to move to the left, the trigger rod 610 is disengaged from the slot 5621, and the plate body 562 on the right can move downward, that is, the telescopic scraper 560 on the right enters the extended state and covers the storage chamber to take over the scraper 520 on the left to collect the scum and share part of the load. In this way, the scum can be collected continuously, and even in the case of a thick scum layer and a large amount of scum, a high flotation efficiency can be maintained, and the overflow of a single scraper 520 due to overload can be avoided. Moreover, the position of the scraper 520 can be automatically adjusted according to the weight of the scum and the collection situation, which has good flexibility and strong adaptability, improves the efficiency and reliability of scum collection, and also reduces the loss caused by scum overflow.

[0037] A reset block 110 is provided on the side wall of the flotation tank 10 at the upward stroke of the conveyor belt. The reset block 110 has a guiding inclined surface for pushing the extending shaft 5622 so that the extending shaft 5622 drives the plate body 562 to move downward, so that the plate body 562 extended from the shell 561 can move downward and reset into the shell 561, completing the reset of the telescopic scraper 560.

[0038] The rotating arms 630 are arranged in pairs and hinged to each other, and the ends of the rotating arms 630 of the pair away from each other are rotatably mounted on the adjacent mounting parts 513. The hinge shaft 631 is arranged at the hinge of the rotating arms 630 of the pair. The torsion spring is connected between the rotating arms 630 of the pair, and is used to apply elastic force to the rotating arms 630 of the pair, so that the rotating arms 630 of the pair are opened in a straight line.

[0039] A trigger block 120 is provided on the side wall of the flotation tank 10 near the slag discharge trough 40. The trigger block 120 has a guiding inclined surface for pushing the hinge shaft 631 downward so that the paired rotating arms 630 are gathered into a V shape, so that when the collected slag is pushed toward the slag discharge trough 40, the scraper 520 on the right is driven close to the scraper 520 on the left, and the storage chamber space between the two scrapers 520 is reduced to apply pressure to the slag and flotation liquid collected in the storage chamber, so that the flotation liquid is squeezed out of the storage chamber, so that the slag and the flotation liquid can be effectively separated, the consumption and loss of the flotation agent are reduced, and the flotation efficiency is improved.

[0040] The filter plate 640 is rotatably mounted on the lower end of the left scraper plate 520, the gear 650 is mounted on the filter plate 640, the rack 660 is moved up and down and assembled on the left scraper plate 520 and meshes with the gear 650, the upper end of the connecting rod 680 is rotatably mounted on the left mounting portion 513, the lower end of the connecting rod 680 has a limiting groove extending along the length direction of the connecting rod 680, the upper end of the rack 660 is provided with a limiting shaft 661 installed in the limiting groove, the right end of the push rod 670 is fixed on the right mounting portion 513, and the left end of the push rod 670 is used to push the connecting rod 680. In this way, when the scraper 520 on the right side approaches the scraper 520 on the left side, the left end of the push rod 670 can push the connecting rod 680 to make the connecting rod 680 rotate around the upper end of the connecting rod 680, thereby driving the rack 660 to move upward, and the rack 660 drives the filter plate 640 to rotate around the gear 650 by meshing with the driving gear 650. The filter plate 640 can rotate toward the storage chamber to assist the scraper 520 in pushing the scum into the scum discharge trough 40 to prevent the scum from overflowing, and further squeeze and filter the scum, thereby effectively removing the flotation liquid in the scum and improving the flotation efficiency.

[0041] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A wastewater treatment device for the production of pharmaceutical intermediates, comprising an air flotation tank, a scraper assembly, a scraper propulsion mechanism for driving the scraper assembly from the left end to the right end of the air flotation tank, and a slag discharge trough at the right end of the air flotation tank, characterized in that: The scraper assembly includes: A scraper unit, wherein the plurality of scraper units are arranged in sequence from left to right, each scraper unit comprises a bracket mounted on the scraper propulsion mechanism, a scraper mounted below the bracket for left and right movement, and a spring connected between the scraper and the bracket, and a storage chamber for accommodating scum is formed between two adjacent scrapers; the bracket comprises a connecting portion, a top plate and a mounting portion distributed in sequence from top to bottom, the connecting portion is fixed on the scraper propulsion mechanism, the top plate is fixedly connected to the connecting portion, the opposite surfaces of two adjacent top plates are in contact, and the mounting portion has a mounting groove with an opening facing downwards for mounting the spring and the scraper; A linkage unit, the linkage unit is connected between two adjacent scraper units, each linkage unit comprises a trigger rod, rotating arms arranged in pairs and hinged to each other, a hinge shaft arranged at the hinge of the pair of rotating arms, and a torsion spring connected between the pair of rotating arms, the left end of each trigger rod is installed on the left scraper to move left and right with the left scraper, the right end of each trigger rod passes through the right bracket and can be inserted into the right scraper to limit the right scraper from moving downward; the ends of the paired rotating arms away from each other are rotatably installed on the mounting portion, and the torsion spring is used to apply elastic force to the paired rotating arms so that the paired rotating arms are opened in a straight line; The scraper unit at the left end is set as the main scraper unit, and the other scraper units are set as auxiliary scraper units. The mounting portion of the main scraper unit is fixedly assembled on the lower surface of the top plate, and the mounting portion of the auxiliary scraper unit is movably assembled on the lower surface of the top plate; the main scraper unit includes a fixed scraper, and the auxiliary scraper unit includes a telescopic scraper. The trigger rod inserted into the telescopic scraper moves to the left with the scraper on the left until it is disengaged, and the telescopic scraper can be extended downward to cover the storage chamber; The telescopic scraper comprises a shell and a plate body assembled in the shell for upward and downward movement, the upper end of the plate body is provided with a limit portion, and the lower end of the shell is provided with an anti-slip stopper for preventing the limit portion from moving downward; A trigger block is arranged at a position near the slag discharge chute on the side wall of the air flotation tank. The trigger block has a guiding inclined surface for pushing the hinge shaft downward to make the paired rotating arms gather into a V shape.

2. A wastewater treatment device for pharmaceutical intermediate production according to claim 1, characterized in that: The plate body is provided with a slot for inserting the trigger rod, and the right end of the trigger rod has an inclined surface that slopes downward from right to left.

3. A wastewater treatment device for pharmaceutical intermediate production according to claim 1, characterized in that: The telescopic scraper is provided with an extension shaft, the scraper propulsion mechanism is a U-shaped conveyor belt, the conveyor belt has an upward stroke and a downward stroke, and the side wall of the flotation tank is provided with a reset block at the upward stroke of the conveyor belt, and the reset block has a guiding inclined surface for pushing the extension shaft downward to reset the telescopic scraper.

4. A wastewater treatment device for pharmaceutical intermediate production according to claim 1, characterized in that: Each linkage unit also includes a driving rod corresponding to the trigger rod one by one, the left end of the trigger rod has a slide groove extending up and down, the left end of the driving rod passes through the left bracket and is fixed to the scraper on the left, and the right end of the driving rod is installed in the slide groove through the driving shaft.

5. A wastewater treatment device for pharmaceutical intermediate production according to claim 1, characterized in that: Each of the linkage units also includes a filter plate, a gear, a rack, a push rod, and a connecting rod. The filter plate is rotatably mounted on the lower end of the left scraper plate, the gear is mounted on the filter plate, the rack moves up and down and is assembled on the left scraper plate and meshes with the gear, the upper end of the connecting rod is rotatably mounted on the mounting portion on the left, the lower end of the connecting rod has a limiting groove extending along the length direction of the connecting rod, the upper end of the rack is provided with a limiting shaft installed in the limiting groove, the right end of the push rod is fixed on the mounting portion on the right, and the left end of the push rod is used to push the connecting rod.

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