Potassium perchlorate preparation wastewater treatment device

Abstract

The present application relates to wastewater treatment technical field, especially a kind of potassium perchlorate preparation wastewater treatment device, including condensing unit, steam filtering unit, evaporation unit and doctor blade stirring unit, evaporation unit is connected with vacuum system, evaporation unit is respectively communicated with condensing unit, steam filtering unit by pipeline, doctor blade stirring unit is installed in evaporation unit inside, doctor blade stirring unit includes rotary drum, the outer wall of rotary drum is equipped with multiple groups of scraping mechanism, and the nozzle corresponding with the hinge joint of scraping mechanism, adjustment mechanism and vibration mechanism are installed in rotary drum inside.It is intermittent adjustment to the impact force of nozzle by adjustment mechanism using the adjustment of rotary drum rotating speed in the process of device shutdown cleaning, control cost is low, the targeted flushing of hinge joint of doctor blade arm is realized, and the targeted vibration of hinge joint of doctor blade arm is carried out simultaneously with vibration mechanism, can accelerate the drop of hinge joint crystal, improve cleaning efficiency.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a device for treating wastewater from potassium perchlorate preparation. Background Technology

[0002] Potassium perchlorate is usually produced by electrolytic oxidation or chemical oxidation of sodium chlorate, and then crystallized after a metathesis reaction with potassium salt. The wastewater generated during its preparation process is characterized by perchlorate, high salinity, and may be acidic or alkaline. In order to improve resource utilization, evaporation and cooling methods are often used to recover valuable components such as potassium and sodium salts from the wastewater during wastewater treatment.

[0003] Currently, high-vacuum low-temperature crystallization equipment is commonly used for the evaporation and cooling of potassium perchlorate preparation wastewater. High-vacuum low-temperature crystallization equipment has advantages such as low energy consumption, good crystal quality, and high degree of compact integration. It mainly consists of a vacuum system, a heat pump system, an evaporation system, a condensation system, a steam filtration system, and a scraper stirring system. Among them, the scraper stirring system is the core guarantee for the stable, efficient, and continuous operation of the entire set of equipment.

[0004] For conditions involving potassium perchlorate wastewater crystallization, a hinged scraper system is a superior choice. It effectively addresses the challenge of hard potassium perchlorate scale, automatically compensating for equipment deformation and wear, and ensuring continuous and stable operation. However, crystals tend to accumulate at the hinge joints of the scraper system. Existing nozzles installed in the evaporation chamber cannot effectively clean these joints, creating cleaning dead zones and affecting the flexibility of the scraper arm's rotation.

[0005] To remove stubborn crystals, the scraper agitator system currently needs to be periodically removed from the evaporation system. The crystals at the hinge points are then dislodged by vibration from an external vibrator or by tapping with a rubber mallet. However, the external vibrator method can easily cause vibration damage to the overall structure of the scraper agitator system, while the rubber mallet method relies on manual operation, which is unstable and inefficient. In addition, the disassembly of the scraper agitator system takes a certain amount of time, affecting the efficiency of wastewater treatment. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a wastewater treatment device for potassium perchlorate preparation to overcome the shortcomings of the prior art. The device includes a condensation unit, a steam filtration unit, an evaporation unit, and a scraper stirring unit. The evaporation unit is externally connected to a vacuum system. The evaporation unit is connected to the condensation unit and the steam filtration unit through pipes. The scraper stirring unit is installed inside the evaporation unit.

[0007] The scraper stirring unit includes a rotating drum rotatably installed inside the evaporation unit. The rotating drum is driven to rotate by an external motor that is detachably connected to it. The rotating drum has a hollow structure, and multiple scraping mechanisms are hinged to the outer wall of the rotating drum.

[0008] The outer wall of the rotating drum is also equipped with a nozzle corresponding to the hinge of the scraping mechanism. The end of the nozzle near the rotating drum is located inside the rotating drum and connected to a flexible hose. The flexible hose is connected to a water supply pipe installed inside the rotating drum and penetrating the outer wall of the evaporation unit through a pipe.

[0009] The rotating drum is equipped with an adjustment mechanism for intermittently squeezing the hose. The impact force of the cleaning fluid sprayed from the nozzle is adjusted by the adjustment mechanism to achieve a pulse effect.

[0010] The rotating drum is also equipped with a vibration mechanism for targeted vibration of the hinge joint of the scraping mechanism.

[0011] Preferably, the scraping mechanism includes a scraper arm hinged to the outer wall of the rotating drum via a pin; the outer wall of the rotating drum has a rotating groove corresponding to the scraper arm, the rotating groove is an arc-shaped structure, and the end of the scraper arm near the rotating drum is an arc-shaped structure that fits into the rotating groove; the scraper arms in the same group are evenly distributed along the length direction of the rotating drum, and the ends of the scraper arms in the same group are jointly mounted with a mounting plate, and multiple inclined scrapers are evenly mounted on the side of the mounting plate away from the scraper arm along its length direction.

[0012] Preferably, the outer wall of the rotating drum is provided with a sliding groove that corresponds to and communicates with the rotating groove. The end of the scraper arm located in the rotating groove is fitted with a sliding block. The sliding block is slidably installed in the sliding groove along the width direction of the rotating drum. A push spring is connected between the sliding block and the sliding groove.

[0013] Preferably, the adjustment mechanism includes an extension plate installed on the side of the sliding block near the inside of the rotating drum, an adjustment block installed on the side wall of the extension plate, and the two sides of the adjustment block arranged along the length of the rotating drum are inclined surfaces; the adjustment mechanism also includes a fixed plate installed inside the rotating drum by a support frame, a squeezing block slidably installed on the fixed plate along the length of the rotating drum, a hose located between the squeezing block and the fixed plate, a return spring connected between the squeezing block and the fixed plate, a trapezoidal plate installed on the side of the squeezing block away from the fixed plate, the side of the trapezoidal plate away from the squeezing block being inclined and fitting against the inclined surface of the adjustment block.

[0014] Preferably, the vibration mechanism includes a guide cylinder installed inside the rotating drum and corresponding to the scraper arm. A vibration block is slidably installed inside the guide cylinder along its length. A mounting spring connects the vibration block and the guide cylinder. Multiple evenly distributed vibration columns are installed at one end of the vibration block near the outer wall of the rotating drum to further improve the vibration targeting.

[0015] Preferably, the vibration mechanism further includes a first cylinder, the middle part of the adjustment block is a hollow structure, the lower part of the vibration block is located inside the hollow structure of the adjustment block, a plurality of second cylinders are evenly installed on the inner wall of the hollow structure of the adjustment block along the width direction of the rotating cylinder, a plurality of first cylinders are evenly installed on the two side walls of the vibration block along the length direction of the rotating cylinder, and a plurality of first cylinders are evenly arranged along the width direction of the rotating cylinder. The top of the second cylinder on the upper side of the rotating cylinder is higher than the top of the corresponding first cylinder, and the bottom of the second cylinder on the upper side of the rotating cylinder is lower than the top of the corresponding first cylinder.

[0016] Preferably, the second cylinder is slidably connected to the vibrating block along the length of the rotating cylinder. The vibrating block has a storage groove inside for the second cylinder to retract. The second cylinder on the same side of the vibrating block is connected to one end of the storage groove with a connecting plate. A cooperating spring connects the connecting plate and the storage groove.

[0017] Preferably, the outer wall of the water supply pipe is connected to a telescopic pipe corresponding to the vibration block, and a conical block is installed at the end of the telescopic pipe away from the water supply pipe.

[0018] Preferably, the rotating drum consists of an outer cylinder with one end open, an inner cylinder that is fixedly inserted into the outer cylinder by bolts, and an end cap that is detachably installed at the open end of the outer cylinder. The end cap has a round hole in the middle for a water supply pipe to pass through, and the outer cylinder is detachably rotatably connected to the evaporation unit.

[0019] Preferably, the inner cylinder is composed of multiple detachable sections of cylinder body, and the cylinder body is composed of two equally divided parts, upper and lower.

[0020] As can be seen from the above technical solutions, the potassium perchlorate preparation wastewater treatment device designed in this invention has the following beneficial effects: 1. During the shutdown and cleaning process of the device, this invention uses the adjustment mechanism to adjust the rotation speed of the drum to intermittently adjust the impact force of the nozzle, which has low control cost and achieves targeted rinsing of the scraper arm hinge. At the same time, the vibration mechanism is used to perform targeted vibration on the scraper arm hinge, which can accelerate the shedding of crystals at the hinge and improve cleaning efficiency.

[0021] 2. The vibration mechanism and adjustment mechanism in this invention are both located inside the rotating drum, which can avoid direct contact with wastewater and prevent the operation effect from being affected by long-term impact from wastewater or by the adhesion of crystals, thus ensuring service life and extending the maintenance cycle. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0024] Figure 2 This is a three-dimensional structural diagram of the rotating drum and scraping mechanism of the present invention (the rotating drum has been cut off).

[0025] Figure 3 This is a three-dimensional structural diagram of the water delivery pipe, adjustment mechanism, and vibration mechanism of the present invention.

[0026] Figure 4 This is a side cross-sectional view of the outer cylinder, inner cylinder, sliding block, etc. of the present invention.

[0027] Figure 5 This is a front sectional view of the outer cylinder, inner cylinder, water delivery pipe, etc. of the present invention.

[0028] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0029] Figure 7 This is a three-dimensional structural diagram of the inner cylinder of the present invention.

[0030] Figure 8 yes Figure 6 Enlarged view of point B in the middle.

[0031] Reference numerals: 1. Condensation unit; 2. Steam filtration unit; 3. Evaporation unit; 4. Scraper stirring unit; 41. Rotary drum; 411. Outer drum; 412. Inner drum; 413. End cap; 42. Scraping mechanism; 421. Scraper arm; 422. Mounting plate; 423. Scraper; 424. Sliding block; 43. Nozzle; 44. Hose; 45. Water supply pipe; 46. Adjusting mechanism; 461. Extension plate; 462. Adjusting block; 463. Fixing plate; 464. Extrusion block; 465. Trapezoidal plate; 47. Vibration mechanism; 471. Guide cylinder; 472. Vibrating block; 473. Vibrating column; 474. Second cylinder; 475. First cylinder; 476. Connecting plate; 477. Telescopic pipe; 478. Conical block. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] See Figure 1 A wastewater treatment device for potassium perchlorate preparation includes a condensation unit 1, a steam filtration unit 2, an evaporation unit 3, and a scraper stirring unit 4. The evaporation unit 3 is connected to an external vacuum system (not shown in the figure). The evaporation unit 3 is connected to the condensation unit 1 and the steam filtration unit 2 through pipes. The scraper stirring unit 4 is installed inside the evaporation unit 3.

[0034] See Figure 1 and Figure 2 The scraper stirring unit 4 includes a rotating drum 41 rotatably installed in the evaporation unit 3. The rotating drum 41 is driven to rotate by an external motor that is detachably connected to the rotating drum 41. The rotating drum 41 has a hollow structure, and multiple scraping mechanisms 42 are hinged to the outer wall of the rotating drum 41.

[0035] See Figure 2 and Figure 3 The outer wall of the rotating drum 41 is also equipped with a nozzle 43 corresponding to the hinge of the scraping mechanism 42. One end of the nozzle 43 near the rotating drum 41 is located inside the rotating drum 41 and is connected to a hose 44. The hose 44 is connected to a water supply pipe 45 installed inside the rotating drum 41 and penetrating the outer wall of the evaporation unit 3 through a pipe.

[0036] See Figure 2 and Figure 3 The rotating drum 41 is equipped with an adjustment mechanism 46 for intermittently squeezing the hose 44. The adjustment mechanism 46 can adjust the impact force of the cleaning fluid sprayed from the nozzle 43 to achieve a pulse effect. The rotating drum 41 is also equipped with a vibration mechanism 47, which is used to provide targeted vibration at the hinge of the scraping mechanism 42 to reduce crystal adhesion. The adjustment mechanism 46 and the vibration mechanism 47 are evenly distributed in the circumferential and axial directions of the rotating drum 41 to ensure the stability of the rotating drum 41 during rotation.

[0037] The preheated wastewater is fed into evaporation unit 3. Due to the vacuum environment, the wastewater boils at a low temperature, the water evaporates, the solution is concentrated and crystals precipitate. The steam generated by evaporation unit 3 enters steam filtration unit 2, where impurities are intercepted, ensuring that only pure steam enters the next stage, protecting condensation unit 1 and the vacuum system. The pure steam enters condensation unit 1 and is condensed into liquid distilled water by cooling water, thus achieving complete separation of water and solute.

[0038] In evaporation unit 3, crystals form a slurry, which is continuously extracted and subjected to solid-liquid separation. The separated solids are recycled as valuable products, while most of the mother liquor is returned to evaporation unit 3 to continue to participate in concentration and crystallization, forming an internal cycle.

[0039] Throughout the evaporation process, the scraper stirring unit 4 continuously scrapes the heat exchange surface to prevent scaling, enhance heat transfer, and ensure that the evaporation unit 3 can operate stably and efficiently for a long time.

[0040] The internal cavity of the evaporation unit 3 is cylindrical. The scraper stirring unit 4 can thoroughly clean the internal cavity of the evaporation unit 3 during rotation. The evaporation unit 3, condensation unit 1 and steam filtration unit 2 all adopt existing technologies. Their specific composition and working principle will not be described in detail here. Multiple flushing nozzles are installed on the inner wall of the evaporation chamber of the evaporation unit 3 to perform overall flushing of the scraper stirring unit 4 when the machine is stopped.

[0041] See Figure 2 and Figure 4 The scraping mechanism 42 includes a scraper arm 421 hinged to the outer wall of the rotating drum 41 via a pin; the outer wall of the rotating drum 41 is provided with a rotating groove corresponding to the scraper arm 421, the rotating groove is an arc-shaped structure, and the end of the scraper arm 421 near the rotating drum 41 is an arc-shaped structure that fits into the rotating groove; the scraper arms 421 in the same group are evenly distributed along the length direction of the rotating drum 41, and the ends of the scraper arms 421 in the same group are all mounted with a mounting plate 422, and a plurality of inclined scrapers 423 are evenly mounted on the side of the mounting plate 422 away from the scraper arm 421 along its length direction.

[0042] See Figure 4 The outer wall of the rotating drum 41 is provided with a sliding groove that corresponds to and communicates with the rotating groove. The end of the scraper arm 421 located in the rotating groove is fixedly attached to a sliding block 424. The sliding block 424 is slidably installed in the sliding groove along the width direction of the rotating drum 41. A push spring is connected between the sliding block 424 and the sliding groove.

[0043] In the initial state, when the rotating drum 41 has not started to rotate, the scraper arm 421 is tilted due to the friction between the scraper arm 421 and the rotating groove and the elastic support force of the push spring on the scraper arm 421. In this tilted state, the end of the scraper 423 is not in contact with the inner wall of the evaporation unit 3. When the external motor drives the rotating drum 41 to rotate at a set speed (the speed of the rotating drum 41 is determined by the technicians after testing), under the action of centrifugal force, the scraper arm 421 drives the end of the scraper 423 to contact the inner wall of the evaporation unit 3, thereby scraping off the crystals attached to the inner wall of the evaporation unit 3 through the scraper 423.

[0044] See Figure 2 and Figure 5 The rotating drum 41 consists of an outer drum 411 with one end open, an inner drum 412 fixedly inserted into the outer drum 411 by bolts (not shown in the figure), and an end cap 413 detachably installed at the open end of the outer drum 411. The end cap 413 has a round hole in the middle for the water supply pipe 45 to pass through. The outer drum 411 is detachably and rotatably sealed to the evaporation unit 3. The specific connection method can be selected from existing technologies, which will not be described in detail here.

[0045] A circular end plate is provided at the left end of the evaporation unit 3 cavity. The circular end plate is detachably connected to the left end of the cavity (e.g., by bolt installation). After removing the circular end plate, the scraper stirring unit 4 can be removed from the evaporation unit 3.

[0046] See Figure 3The adjustment mechanism 46 includes an extension plate 461 installed on the side of the sliding block 424 near the inside of the rotating cylinder 41. An adjustment block 462 is installed on the side wall of the extension plate 461, and the two sides of the adjustment block 462 arranged along the length of the rotating cylinder 41 are inclined surfaces. The extension plate 461 has a U-shaped structure, and the two vertical sections of the extension plate 461 slide through the inner wall of the rotating cylinder 41 and are slidably and sealingly connected to the rotating cylinder 41 (existing contact dynamic sealing technology can be used) to maintain the isolation between the internal and external environments of the rotating cylinder 41.

[0047] like Figure 3 and Figure 4 As shown, in order to improve the stability of the movement of the adjusting block 462, a guide rod can be provided on the inner wall of the rotating drum 41 to guide the adjusting block 462.

[0048] See Figure 3 , Figure 6 and Figure 8 The adjustment mechanism 46 also includes a fixed plate 463 installed inside the rotating drum 41 via a support frame. A pressing block 464 is slidably installed on the fixed plate 463 along the length of the rotating drum 41. A hose 44 is located between the pressing block 464 and the fixed plate 463. A return spring (not shown in the figure) is connected between the pressing block 464 and the fixed plate 463. A trapezoidal plate 465 is installed on the side of the pressing block 464 away from the fixed plate 463. The side of the trapezoidal plate 465 away from the pressing block 464 is an inclined surface and fits against the inclined surface of the adjustment block 462.

[0049] After a period of evaporation and crystallization, the flow of potassium perchlorate wastewater is stopped. After all the wastewater in the evaporation unit 3 is treated, the scraper stirring unit 4 is cleaned. The end of the water supply pipe 45 is connected to the water pump through a rotary joint (existing technology), and cleaning liquid is introduced into the water supply pipe 45. At the same time, the external motor drives the rotating drum 41 to rotate at a set speed. Under the action of centrifugal force, compared with the initial state, the pressure of the scraper arm 421 on the push spring is reduced. Therefore, the push spring is extended and the sliding block 424 drives the adjusting block 462 to move through the extension plate 461. During the movement of the adjusting block 462, the relative movement of its inclined surface and the inclined surface of the trapezoidal plate 465 drives the squeezing block 464 to move closer to the fixed plate 463, thereby squeezing the hose 44 between the squeezing block 464 and the fixed plate 463, so that the cross-section of the hose 44 is reduced.

[0050] Under the premise that the flow rate of the cleaning fluid pumped in by the water pump remains unchanged, the reduction of the cross-section of the hose 44 will result in a greater impact force of the cleaning fluid sprayed from the nozzle 43. Moreover, the greater the rotation speed, the greater the centrifugal force on the scraper arm 421, and the greater the distance that the sliding block 424 drives the extension plate 461 to move. Therefore, during the cleaning process, the flushing force of the nozzle 43 can be controlled by adjusting the rotation speed of the drum 41, which helps to specifically clean the stubborn crystals at the hinge of the scraper arm 421.

[0051] Compared to prolonged high-intensity rinsing, the above-described rinsing method helps save energy and avoids structural damage to the hinge joints caused by prolonged heavy impact. Furthermore, by intermittently changing the rotation speed of the drum 41, the tilt state of the scraper arm 421 can be altered, causing the contact position between the scraper arm 421 and the rotating groove to continuously change. This relative movement between the two accelerates the shedding of crystals at corresponding locations, further improving the cleaning effect.

[0052] Regarding the setting of the rotation speed of the rotating drum 41, it should be noted that before the device is officially put into use, the external motor drives the rotating drum 41 to rotate from slow to fast, and monitors whether the scraper 423 is in close contact with the inner wall of the evaporation unit 3 cavity (this can be judged by the sound during operation; when the sound of the scraper 423 contacting the evaporation unit 3 becomes a continuous and steady "hissing" sound, it means that the scraper 423 is just in contact with the inner wall of the cavity). The speed at which the scraper 423 is just in contact with the inner wall of the evaporation unit 3 cavity is recorded. This speed is used as a reference and is taken as the rotation speed when the scraper 423 cleans the inner wall of the evaporation unit 3. When it is necessary to clean the scraper stirring unit 4, the rotation speed can be increased in stages based on the reference speed to intermittently change the cross-sectional size of the hose 44.

[0053] See Figure 3 , Figure 6 and Figure 8 The vibration mechanism 47 includes a guide cylinder 471 installed inside the rotating drum 41 and corresponding one-to-one with the scraper arm 421. A vibration block 472 is slidably installed inside the guide cylinder 471 along its length direction. A mounting spring connects the vibration block 472 and the guide cylinder 471. A plurality of evenly distributed vibration columns 473 are installed at one end of the vibration block 472 near the outer wall of the rotating drum 41 to further improve the vibration targeting.

[0054] See Figure 3 , Figure 6 and Figure 8 The vibration mechanism 47 also includes a first cylinder 475. The middle part of the adjusting block 462 is a hollow structure. The lower part of the vibration block 472 is located inside the hollow structure of the adjusting block 462. Multiple second cylinders 474 are evenly installed on the inner wall of the hollow structure of the adjusting block 462 along the width direction of the rotating cylinder 41. Multiple first cylinders 475 are evenly installed on the two side walls of the vibration block 472 along the length direction of the rotating cylinder 41. Taking the second cylinder 474 on the upper side of the rotating cylinder 41 as an example, the position of the second cylinder 474 is higher than that of the first cylinder 475. Specifically, the top of the second cylinder 474 is higher than the top of the first cylinder 475, and the bottom of the second cylinder 474 is lower than the top of the first cylinder 475.

[0055] See Figure 5 and Figure 7To improve the convenience of maintenance, the vibration mechanism 47 and the adjustment mechanism 46 (except for the extension plate 461) are both installed on the inner cylinder 412. The inner cylinder 412 is composed of multiple sections of cylinder that can be detachably spliced ​​together. The cylinder is composed of two equal parts, upper and lower, so as to maintain the internal components of the inner cylinder 412.

[0056] As the adjusting block 462 moves with the sliding block 424, the second cylinder 474 on it moves synchronously. When the second cylinder 474 comes into contact with the first cylinder 475, it applies downward pressure to the vibrating block 472 through the first cylinder 475, causing the vibrating block 472 to move downward. When the second cylinder 474 moves to separate from the first cylinder 475, the vibrating block 472 returns to its original position under the elastic force of the installed spring, so that the vibrating column 473 strikes the inner wall of the rotating drum 41 at the hinge of the scraper arm 421. This process is repeated, and during the cleaning process, targeted vibration and striking are achieved at the hinge of the scraper arm 421, which helps the crystals to fall off quickly.

[0057] Compared to disassembling the entire scraper stirring unit 4 and then using a vibrator or rubber hammer to vibrate or tap it, the above method is more convenient and faster. Compared to adding a pulse generator to the nozzle flushing system, it does not require a high-frequency switching valve or a complex control system, resulting in low control costs. Furthermore, the vibration mechanism 47 is located inside the rotating drum 41 and will not come into direct contact with wastewater or crystals, thus eliminating the need for frequent maintenance.

[0058] To prevent vibration of the scraper arm 421 by the vibrating block 472 due to changes in the rotational speed of the drum 41 during operation, which could affect the crystallization effect or cause structural fatigue, the vibration mechanism 47 has been improved as follows: (See attached document) Figure 6 The second cylinder 474 is slidably connected to the vibrating block 472 along the length of the rotating cylinder 41. The vibrating block 472 has a storage groove for the second cylinder 474 to retract. The second cylinder 474 on the same side of the vibrating block 472 is connected to a connecting plate 476 at one end of the storage groove. A cooperating spring connects the connecting plate 476 and the storage groove.

[0059] See Figure 6 and Figure 8 The outer wall of the water supply pipe 45 is connected to a telescopic pipe 477 corresponding to the vibration block 472, and a conical block 478 is installed at the end of the telescopic pipe 477 away from the water supply pipe 45.

[0060] After the water pump introduces cleaning fluid into the water delivery pipe 45, some of the cleaning fluid enters the telescopic pipe 477 and expands it, causing the telescopic pipe 477 to move the conical block 478 closer to the vibrating block 472. The conical block 478, through the pushing action of the connecting plates 476 on both sides, causes the second cylinder 474, which was originally located in the receiving groove, to move outward. Then, the second cylinder 474 can cooperate with the first cylinder 475 to make the vibrating block 472 reciprocate, thereby achieving targeted vibration at the hinge of the scraper arm 421 and accelerating the shedding of crystals at the hinge.

[0061] After cleaning is completed, the cleaning liquid in the water supply pipe 45 is completely extracted by the water pump. The telescopic pipe 477 retracts and drives the conical block 478 to move out between the connecting plates 476 on both sides. With the help of the spring, the connecting plate 476 is reset, so that the second cylinder 474 moves into the receiving tank. Therefore, in the subsequent evaporation and crystallization process, the first cylinder 475 will not cooperate with the second cylinder 474, and the vibrating block 472 will not transmit vibration to the hinge of the scraper arm 421, thus not affecting the crystallization process and the reliability of the device structure.

[0062] It should be noted that, in order to ensure that the telescopic tube 477 can retract to the position where the conical block 478 does not contact the connecting plate 476 after the cleaning fluid in the water supply pipe 45 is completely extracted, a helical spring can be installed between the telescopic tube 477 and the water supply pipe 45. The elastic force of the helical spring will assist the telescopic tube 477 to retract to its original state.

[0063] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0064] In the description of this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0066] The above provides a detailed description of a potassium perchlorate preparation wastewater treatment device provided by the present invention. For those skilled in the art, based on the ideas of the embodiments of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A wastewater treatment device for potassium perchlorate preparation, comprising a condensation unit, a steam filtration unit, an evaporation unit, and a scraper stirring unit, wherein the evaporation unit is connected to the condensation unit and the steam filtration unit respectively via pipelines, and the scraper stirring unit is installed inside the evaporation unit, characterized in that: The scraper stirring unit includes a rotating drum rotatably installed inside the evaporation unit. The rotating drum has a hollow structure and multiple scraping mechanisms are hinged to the outer wall of the rotating drum. The outer wall of the rotating drum is also equipped with a nozzle corresponding to the hinge of the scraping mechanism. The end of the nozzle near the rotating drum is located inside the rotating drum and connected to a hose. The hose is connected to a water supply pipe installed inside the rotating drum and penetrating the outer wall of the evaporation unit through a pipe. The rotating drum is equipped with an adjustment mechanism for intermittently squeezing the hose. The impact force of the cleaning fluid sprayed from the nozzle is adjusted by the adjustment mechanism to achieve a pulse effect. The rotating drum is also equipped with a vibration mechanism for targeted vibration of the hinge joint of the scraping mechanism. The scraping mechanism includes a scraper arm that is hinged to the outer wall of the rotating drum via a pin. The outer wall of the rotating drum is provided with rotating grooves that correspond one-to-one with the scraper arms. The rotating grooves are arc-shaped, and the end of the scraper arm near the rotating drum is an arc-shaped structure that fits into the rotating groove. The scraper arms in the same group are evenly distributed along the length of the rotating drum, and the ends of the scraper arms in the same group are all equipped with a fixing plate. On the side of the fixing plate away from the scraper arm, multiple inclined scrapers are evenly installed along its length. The outer wall of the rotating drum is provided with a sliding groove that corresponds to and communicates with the rotating groove. The end of the scraper arm located in the rotating groove is attached to a sliding block. The sliding block is slidably installed in the sliding groove along the width direction of the rotating drum. A push spring is connected between the sliding block and the sliding groove. The adjustment mechanism includes an extension plate installed on the side of the sliding block near the inside of the rotating cylinder. An adjustment block is installed on the side wall of the extension plate, and the two sides of the adjustment block arranged along the length of the rotating cylinder are inclined surfaces. The adjustment mechanism also includes a fixed plate installed inside the rotating drum via a support frame. A squeezing block is slidably installed on the fixed plate along the length of the rotating drum. A hose is located between the squeezing block and the fixed plate. A return spring is connected between the squeezing block and the fixed plate. A trapezoidal plate is installed on the side of the squeezing block away from the fixed plate. The side of the trapezoidal plate away from the squeezing block is inclined and fits against the inclined surface of the adjustment block.

2. The potassium perchlorate preparation wastewater treatment device according to claim 1, characterized in that, The vibration mechanism includes guide cylinders installed inside the rotating drum and corresponding to the scraper arms one by one. Vibration blocks are slidably installed inside the guide cylinders along their length. A mounting spring connects the vibration blocks to the guide cylinders. Multiple evenly distributed vibration columns are installed at one end of the vibration blocks near the outer wall of the rotating drum.

3. The potassium perchlorate preparation wastewater treatment device according to claim 2, characterized in that, The vibration mechanism also includes a first cylinder, the middle part of the adjustment block is a hollow structure, the lower part of the vibration block is located inside the hollow structure of the adjustment block, and multiple second cylinders are evenly installed on the inner wall of the hollow structure of the adjustment block along the width direction of the rotating cylinder. On both side walls of the vibrating block arranged along the length of the rotating cylinder, there are multiple No. 1 cylinders evenly arranged along the width of the rotating cylinder. The top of the No. 2 cylinder on the upper side of the rotating cylinder is higher than the top of the corresponding No. 1 cylinder, and the bottom of the No. 2 cylinder on the upper side of the rotating cylinder is lower than the top of the corresponding No. 1 cylinder.

4. The potassium perchlorate preparation wastewater treatment device according to claim 3, characterized in that, The second cylinder is slidably connected to the vibrating block along the length of the rotating cylinder. The vibrating block has a storage groove inside for the second cylinder to retract. The second cylinder on the same side of the vibrating block is connected to a connecting plate at one end of the storage groove. A cooperating spring connects the connecting plate and the storage groove.

5. The potassium perchlorate preparation wastewater treatment device according to claim 4, characterized in that, The outer wall of the water supply pipe is connected to a telescopic pipe that corresponds to the vibrating block. A conical block is installed at the end of the telescopic pipe away from the water supply pipe.

6. The potassium perchlorate preparation wastewater treatment device according to claim 1, characterized in that, The rotating drum consists of an outer cylinder with one end open, an inner cylinder fixedly inserted inside the outer cylinder, and an end cap that can be detachably installed at the opening end of the outer cylinder. The end cap has a round hole in the middle for the water supply pipe to pass through. The outer cylinder is detachably and rotatably connected to the evaporation unit.

7. The potassium perchlorate preparation wastewater treatment device according to claim 6, characterized in that, The inner cylinder is composed of multiple detachable sections, and the cylinder itself consists of two equal parts, upper and lower.

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