Potassium perchlorate preparation wastewater treatment device

Abstract

The invention relates to the technical field of wastewater treatment, in particular to a potassium perchlorate preparation wastewater treatment device which comprises a condensation unit, a steam filtering unit, an evaporation unit and a scraper stirring unit. The scraper stirring unit is installed in the evaporation unit and comprises a rotary drum, multiple sets of scraping mechanisms and nozzles corresponding to the hinged positions of the scraping mechanisms are installed on the outer wall of the rotary drum, and an adjusting mechanism and a vibration mechanism are installed in the rotary drum. In the shutdown cleaning process of the device, the impact force of the nozzle is intermittently adjusted by adjusting the rotating speed of the rotating drum through the adjusting mechanism, the control cost is low, targeted flushing of the hinged position of the scraper arm is achieved, meanwhile, targeted vibration is conducted on the hinged position of the scraper arm in cooperation with the vibration mechanism, falling of crystals at the hinged position can be accelerated, and the cleaning efficiency is improved. The cleaning efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wastewater treatment, in particular to a device for treating wastewater produced in the preparation of potassium perchlorate. BACKGROUND

[0002] Potassium perchlorate is usually prepared by electrolytic oxidation or chemical oxidation of sodium chlorate to produce sodium perchlorate, and then by double decomposition reaction with potassium salt to form crystals. The wastewater produced in the preparation process has the characteristics of high perchlorate, high salinity, and may be acidic or alkaline. In order to improve resource utilization, when treating wastewater, evaporation cooling is often used to recover valuable components such as potassium salt and sodium salt in the wastewater.

[0003] At present, high vacuum low temperature crystallization equipment is often used for evaporation cooling of potassium perchlorate wastewater. The high vacuum low temperature crystallization equipment has the advantages of low energy consumption, good crystal quality, compact equipment integration, etc. 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. The scraper stirring system is the core guarantee for stable, efficient and continuous operation of the whole equipment.

[0004] For potassium perchlorate wastewater crystallization, the hinged scraper system is a better choice, which can well cope with the challenge of hard scale layer of potassium perchlorate, automatically compensate for equipment deformation and its own wear and tear, and ensure continuous and stable operation. However, the hinge of the scraper system is prone to accumulate crystals, and the existing spray head installed in the evaporation chamber cannot effectively flush the hinge, which may form a cleaning dead angle and affect the rotation flexibility of the scraper arm.

[0005] In order to clean stubborn crystals, the scraper stirring system needs to be disassembled from the evaporation system regularly, and the crystals at the hinge are removed by external vibrator vibration or rubber hammer knocking. The external vibrator vibration method is easy to cause vibration damage to the overall structure of the scraper stirring system, while the rubber hammer knocking method relies on manual operation, which has poor stability and low efficiency. In addition, the disassembly of the scraper stirring system takes a certain amount of time, which affects the efficiency of wastewater treatment. SUMMARY

[0006] Therefore, the present application aims to provide a device for treating wastewater produced in the preparation of potassium perchlorate, which solves the above problems in the prior art. The device comprises a condensation unit, a steam filtration unit, an evaporation unit and a scraper stirring unit. The evaporation unit is 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 comprises a rotating drum rotatably installed in the evaporation unit, the rotating drum is driven to rotate by an external motor detachably connected with the rotating drum, the rotating drum is a hollow structure, and a plurality of scraping mechanisms are hingedly installed on the outer wall of the rotating drum.

[0008] The outer wall of the rotating drum is further provided with nozzles corresponding to the hinged portions of the scraping mechanisms, one end of each nozzle close to the rotating drum is located inside the rotating drum and connected with a hose, and the hose is in communication with a water supply pipe installed inside the rotating drum and penetrating through the outer wall of the evaporation unit.

[0009] The rotating drum is internally provided with an adjusting mechanism for intermittently extruding the hose, the impact force of the cleaning liquid sprayed by the nozzles is adjusted by the adjusting mechanism to achieve pulse action.

[0010] The rotating drum is further internally provided with a vibrating mechanism for targeted vibration of the hinged portions of the scraping mechanisms.

[0011] Preferably, the scraping mechanism comprises a scraper arm hingedly connected with the outer wall of the rotating drum through a pin shaft; the outer wall of the rotating drum is provided with rotating grooves corresponding to the scraper arms one by one, the rotating grooves are arc-shaped structures, and one end of the scraper arm close to the rotating drum is an arc-shaped structure matched with the rotating grooves; the scraper arms in the same group are uniformly distributed along the length direction of the rotating drum, and the end portions of the scraper arms in the same group are jointly provided with a mounting plate, and a plurality of scraper blades obliquely arranged are uniformly mounted on one side of the mounting plate away from the scraper arms along the length direction of the mounting plate.

[0012] Preferably, the outer wall of the rotating drum is provided with sliding grooves corresponding to and in communication with the rotating grooves one by one, and the end portion of the scraper arm located in the rotating groove is matched with a sliding block, the sliding block is slidingly installed in the sliding groove along the width direction of the rotating drum, and a pushing spring is connected between the sliding block and the sliding groove.

[0013] Preferably, the adjusting mechanism comprises an extension plate installed on one side of the sliding block close to the inside of the rotating drum, the extension plate is provided with an adjusting block on the side wall, and the two sides of the adjusting block arranged along the length direction of the rotating drum are inclined surfaces; the adjusting mechanism further comprises a fixed plate installed in the inside of the rotating drum through a support frame, the fixed plate is slidingly installed with a pressing block along the length direction of the rotating drum, the hose is located between the pressing block and the fixed plate, a return spring is connected between the pressing block and the fixed plate, a trapezoidal plate is installed on one side of the pressing block away from the fixed plate, and the side of the trapezoidal plate away from the pressing block is an inclined surface matched with the inclined surface of the adjusting block.

[0014] Preferably, the vibrating mechanism comprises a guide cylinder installed in the inside of the rotating drum and corresponding to the scraper arms one by one, a vibrating block is slidingly installed in the guide cylinder along the length direction of the guide cylinder, a mounting spring is connected between the vibrating block and the guide cylinder, a plurality of uniformly distributed vibrating columns are installed on one end of the vibrating block close to the outer wall of the rotating drum, so as to further improve the targeting of vibration.

[0015] Preferably, the vibration mechanism further comprises a first cylinder, the middle part of the adjusting block is a hollow structure, the lower part of the vibration block is located in the hollow structure of the adjusting block, a plurality of second cylinders are uniformly arranged on the inner wall of the hollow structure of the adjusting block along the width direction of the rotating drum, a plurality of first cylinders are uniformly arranged on the two side walls of the vibration block along the length direction of the rotating drum, the top end of the second cylinder on the upper side of the rotating drum is higher than the top end of the corresponding first cylinder, and the bottom end of the second cylinder on the upper side of the rotating drum is lower than the top end of the corresponding first cylinder.

[0016] Preferably, the second cylinder is in sliding connection with the vibration block along the length direction of the rotating drum, a receiving groove is arranged in the vibration block for receiving the second cylinder, and a connecting plate is arranged at one end of the receiving groove and connected with the second cylinder on the same side of the vibration block.

[0017] Preferably, the outer wall of the water feeding pipe is connected with a plurality of telescopic pipes corresponding to the vibration blocks, and a tapered block is arranged at the end of the telescopic pipe away from the water feeding pipe.

[0018] Preferably, the rotating drum is composed of an outer drum with an open end, an inner drum fixedly connected to the inner part of the outer drum through bolts, and an end cover detachably connected to the open end of the outer drum, a circular hole is arranged in the middle part of the end cover for the water feeding pipe to pass through, and the outer drum is detachably connected with the evaporation unit.

[0019] Preferably, the inner drum is composed of a plurality of cylinder bodies which are detachably connected, and each cylinder body is composed of two parts which are equally divided into upper and lower parts.

[0020] As can be seen from the above technical solutions, the potassium perchlorate preparation wastewater treatment device has the following advantages: 1. During the cleaning process of the device, the impact force of the nozzle is intermittently adjusted by the adjusting mechanism through the adjustment of the rotating speed of the rotating drum, the cost of control is low, the targeted flushing of the hinge part of the scraper arm is realized, and the vibration mechanism is used for targeted vibration of the hinge part of the scraper arm, which can accelerate the falling of the crystal at the hinge part and improve the cleaning efficiency.

[0021] 2. The vibration mechanism and the adjusting mechanism in the application are located in the rotating drum, which can avoid direct contact with the wastewater, will not affect the operation effect due to long-time impact of the wastewater or attachment of the crystal, and can ensure the service life and prolong the maintenance period. BRIEF DESCRIPTION OF DRAWINGS

[0022] The application will be further described below in combination with the drawings and examples.

[0023] Figure 1 is a perspective view of the application.

[0024] Figure 2 is a perspective view of the rotating drum and the scraping mechanism of the application (part of the rotating drum is cut away).

[0025] Figure 3 is the perspective view of the water delivery pipe, adjusting mechanism and vibration mechanism of the present application.

[0026] Figure 4 is the lateral sectional view of the outer cylinder, inner cylinder, sliding block and the like of the present application.

[0027] Figure 5 is the frontal sectional view of the outer cylinder, inner cylinder, water delivery pipe and the like of the present application.

[0028] Figure 6 is the Figure 5 enlarged view of A in the figure.

[0029] Figure 7 is the perspective view of the inner cylinder of the present application.

[0030] Figure 8 is the Figure 6 enlarged view of B in the figure.

[0031] Reference signs: 1, condensing unit; 2, steam filtering unit; 3, evaporating unit; 4, scraper stirring unit; 41, rotating drum; 411, outer cylinder; 412, inner cylinder; 413, end cover; 42, scraping mechanism; 421, scraper arm; 422, mounting plate; 423, scraper; 424, sliding block; 43, nozzle; 44, hose; 45, water delivery pipe; 46, adjusting mechanism; 461, extension plate; 462, adjusting block; 463, fixing plate; 464, extruding block; 465, trapezoidal plate; 47, vibration mechanism; 471, guide cylinder; 472, vibrating block; 473, vibrating column; 474, No. 2 cylinder; 475, No. 1 cylinder; 476, connecting plate; 477, telescopic pipe; 478, conical block. DETAILED DESCRIPTION

[0032] In order to make the person in the art better understand the present application scheme, the present application is further described in detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0033] Reference Figure 1 , a potassium perchlorate preparation wastewater treatment device, comprising a condensing unit 1, a steam filtering unit 2, an evaporating unit 3 and a scraper stirring unit 4, the evaporating unit 3 is connected with a vacuum system (not shown in the figure), the evaporating unit 3 is communicated with the condensing unit 1 and the steam filtering unit 2 through pipes respectively, and the scraper stirring unit 4 is installed inside the evaporating unit 3.

[0034] Reference Figure 1 andFigure 2 The scraper stirring unit 4 comprises a rotating drum 41 rotatably installed in the evaporation unit 3, the rotating drum 41 is driven to rotate by an external motor detachably connected with the rotating drum 41, the rotating drum 41 is a hollow structure, and a plurality of scraping mechanisms 42 are hingedly installed on the outer wall of the rotating drum 41.

[0035] Referring to Figure 2 and Figure 3 The outer wall of the rotating drum 41 is further provided with nozzles 43 corresponding to the hinged positions of the scraping mechanisms 42, one end of the nozzles 43 close to the rotating drum 41 is located inside the rotating drum 41 and connected with a hose 44, and the hose 44 is communicated with a water supply pipe 45 installed inside the rotating drum 41 and penetrating through the outer wall of the evaporation unit 3 through a pipeline.

[0036] Referring to Figure 2 and Figure 3 The rotating drum 41 is further provided with adjusting mechanisms 46 for intermittently pressing the hose 44, the adjusting mechanisms 46 can adjust the impact force of the cleaning liquid sprayed by the nozzles 43 to achieve pulse action; and the rotating drum 41 is further provided with vibration mechanisms 47 for targeted vibration of the hinged positions of the scraping mechanisms 42 to reduce crystal adhesion. The adjusting mechanisms 46 and the vibration mechanisms 47 are uniformly distributed in the circumferential direction and the axial direction of the rotating drum 41, so as to ensure the stability of the rotating drum 41 during rotation.

[0037] The preheated wastewater is introduced into the evaporation unit 3, the wastewater is boiled at low temperature due to the vacuum environment, the water evaporates, the solution is concentrated and the crystals are separated out, the steam generated by the evaporation unit 3 enters the steam filtering unit 2, the impurities are intercepted by the steam filtering unit 2, so that only pure steam enters the next link, and the condensing unit 1 and the vacuum system are protected, and the pure steam enters the condensing unit 1 and is condensed into liquid distilled water by cooling water, so as to realize complete separation of water and solute.

[0038] The crystals in the evaporation unit 3 form a crystal slurry, which is continuously extracted and subjected to solid-liquid separation, the separated solid is recovered as valuable product, and most of the mother liquor is returned to the evaporation unit 3 to continue participating in concentration and crystallization, forming an internal circulation.

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

[0040] The internal cavity of the evaporation unit 3 is cylindrical, and the scraper stirring unit 4 can comprehensively clean the internal cavity of the evaporation unit 3 during rotation; the evaporation unit 3, the condensing unit 1 and the steam filtering unit 2 all adopt existing technologies, and their specific compositions and working principles are not described here, a plurality of flushing nozzles are arranged on the inner wall of the evaporation chamber of the evaporation unit 3 to flush the scraper stirring unit 4 as a whole when the machine is stopped.

[0041] Referring to Figure 2 With Figure 4 , the scraping mechanism 42 comprises a scraper arm 421 hinged with the outer wall of the rotating drum 41 through a pin shaft; the outer wall of the rotating drum 41 is provided with rotating grooves corresponding to the scraper arms 421, the rotating grooves are arc-shaped structures, and the end of the scraper arm 421 close to the rotating drum 41 is arc-shaped structure that fits the rotating grooves; the scraper arms 421 in the same group are uniformly distributed along the length direction of the rotating drum 41, and the end portions of the scraper arms 421 in the same group are jointly provided with a mounting plate 422, and the side of the mounting plate 422 away from the scraper arms 421 is uniformly provided with a plurality of scraper blades 423 arranged obliquely along the length direction thereof.

[0042] Referring to Figure 4 , the outer wall of the rotating drum 41 is provided with sliding grooves corresponding to the rotating grooves and communicating with the rotating grooves, the end portion of the scraper arm 421 located in the rotating groove is fixedly fitted with a sliding block 424, the sliding block 424 is slidingly installed in the sliding groove along the width direction of the rotating drum 41, and a pushing spring is connected between the sliding block 424 and the sliding groove.

[0043] In the initial state, i.e. when the rotating drum 41 has not started to rotate, under the action of the friction between the scraper arm 421 and the rotating groove and the elastic supporting force of the pushing spring on the scraper arm 421, the scraper arm 421 is in an inclined state, and in this inclined state, the end portion of the scraper blade 423 is not fitted 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 rotating speed of the rotating drum 41 is determined by the technician after test), under the action of the centrifugal force, the end portion of the scraper blade 423 is fitted with the inner wall of the evaporation unit 3 driven by the scraper arm 421, so that the crystal adhering to the inner wall of the evaporation unit 3 is scraped off by the scraper blade 423.

[0044] Referring to Figure 2 With Figure 5 , the rotating drum 41 is composed of an outer drum 411 with an open end, an inner drum 412 fixedly inserted into the inner portion of the outer drum 411 through bolts (not shown in the figure), and an end cover 413 detachably installed at the open end of the outer drum 411, a circular hole for the water feeding pipe 45 to pass through is formed in the middle portion of the end cover 413, the outer drum 411 is detachably and rotatably sealingly connected with the evaporation unit 3, and the specific connection mode can be selected from the existing technology, which will not be described here.

[0045] A circular end plate is arranged at the left end of the cavity of the evaporation unit 3, and the circular end plate is detachably connected with the left end of the cavity (such as being installed through bolts), after the circular end plate is removed, the scraper stirring unit 4 can be removed and taken out from the evaporation unit 3.

[0046] Referring to Figure 3The adjusting mechanism 46 comprises an extension plate 461 mounted on the sliding block 424 near the inner side of the rotating drum 41, and the side wall of the extension plate 461 is provided with an adjusting block 462, and the two sides of the adjusting block 462 arranged along the length direction of the rotating drum 41 are inclined. The extension plate 461 is in U-shaped structure, and the two vertical sections of the extension plate 461 are slidably penetrated through the inner wall of the rotating drum 41 and are in sliding sealing connection with the rotating drum 41 (optional contact type dynamic sealing technology), so as to keep the isolation state of the inner and outer environments of the rotating drum 41.

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

[0048] Referring to Figure 3 , Figure 6 With Figure 8 , the adjusting mechanism 46 further comprises a fixed plate 463 mounted in the inner part of the rotating drum 41 through a support frame, and the fixed plate 463 is slidably mounted with an extrusion block 464 along the length direction of the rotating drum 41, the hose 44 is located between the extrusion block 464 and the fixed plate 463, a return spring (not shown in the figure) is connected between the extrusion block 464 and the fixed plate 463, a trapezoidal plate 465 is mounted on the side of the extrusion block 464 away from the fixed plate 463, and the side of the trapezoidal plate 465 away from the extrusion block 464 is inclined and matched with the inclined surface of the adjusting block 462.

[0049] After a period of evaporation crystallization, the inflow of potassium perchlorate wastewater is stopped, and after the wastewater in the evaporation unit 3 is completely treated, the scraper stirring unit 4 is cleaned, the end of the water feeding pipe 45 is communicated with the water pump through the rotary joint (existing technology), the cleaning liquid is fed into the water feeding pipe 45, and the rotating drum 41 is driven to rotate at a set speed through the external motor, under the action of centrifugal force, compared with the initial state, the pressure of the scraper arm 421 on the pushing spring is reduced, so that the pushing spring is elongated and the sliding block 424 drives the adjusting block 462 to move through the extension plate 461, and during the movement of the adjusting block 462, the relative movement of the inclined surface of the adjusting block 462 and the inclined surface of the trapezoidal plate 465 drives the extrusion block 464 to move close to the fixed plate 463, and then the hose 44 between the extrusion block 464 and the fixed plate 463 is extruded, so that the cross section of the hose 44 is reduced.

[0050] Under the premise that the flow of the cleaning liquid pumped by the water pump is unchanged, the reduction of the cross section of the hose 44 will cause the impact force of the cleaning liquid sprayed by the nozzle 43 to become larger, and the greater the rotating speed, the greater the centrifugal force acting on the scraper arm 421, and the greater the distance of the movement of the sliding block 424 driving the extension plate 461, so that during the cleaning process, the cleaning intensity of the nozzle 43 can be controlled by adjusting the rotating speed of the rotating drum 41, and then it is helpful to clean the stubborn crystals at the hinge of the scraper arm 421.

[0051] The above flushing mode helps save energy consumption compared to the mode of cleaning for a long time with high-intensity flushing force, and avoids structural damage caused by long-time impact on the hinge. In addition, by intermittently changing the rotating speed of the rotating drum 41, the inclination state of the scraper arm 421 can also be changed, so that the contact position of the scraper arm 421 with the rotating groove is constantly changed, and then the corresponding position of the crystal is accelerated by the relative movement of the two, thereby realizing the effect of further improving the cleaning effect.

[0052] Regarding the setting of the rotating speed of the rotating drum 41, it needs to be supplemented that before the device is officially put into use, the rotating drum 41 is driven to rotate from slow to fast by an external motor, and it is monitored whether the scraper 423 is tightly attached to the inner wall of the cavity of the evaporation unit 3 (which can be judged by the sound during operation. When the sound of the scraper 423 contacting the evaporation unit 3 becomes continuous and smooth “sizzle”, it means that the scraper 423 is just attached to the inner wall of the cavity. The speed at which the scraper 423 is just attached to the inner wall of the cavity of the evaporation unit 3 is recorded, and the speed is taken as the reference speed, and it is used as the rotating speed of the scraper 423 when cleaning the inner wall of the evaporation unit 3. When the scraper stirring unit 4 needs to be cleaned, the rotating speed can be increased on the basis of the reference speed in stages, so as to intermittently change the cross-sectional size of the hose 44.

[0053] Referring to Figure 3 , Figure 6 and Figure 8 , the vibration mechanism 47 comprises a guide cylinder 471 mounted inside the rotating drum 41 and corresponding to the scraper arm 421. The vibration block 472 is slidably mounted in the guide cylinder 471 along the length direction of the guide cylinder 471. The vibration block 472 is connected with the guide cylinder 471 through a mounting spring. A plurality of vibration columns 473 are uniformly distributed and mounted on one end of the vibration block 472 close to the outer wall of the rotating drum 41, so as to further improve the targeting of the vibration.

[0054] Referring to Figure 3 , Figure 6 and Figure 8 , the vibration mechanism 47 further comprises a first cylinder 475. The middle part of the adjusting block 462 is a hollow structure, and the lower part of the vibration block 472 is located in the hollow structure of the adjusting block 462. A plurality of second cylinders 474 are uniformly mounted on the inner wall of the hollow structure of the adjusting block 462 along the width direction of the rotating drum 41. A plurality of first cylinders 475 are uniformly arranged on the two side walls of the vibration block 472 along the width direction of the rotating drum 41. Taking the second cylinder 474 on the upper side of the rotating drum 41 as an example, the position of the second cylinder 474 is higher than that of the first cylinder 475. Specifically, the top end of the second cylinder 474 is higher than that of the first cylinder 475, and the bottom end of the second cylinder 474 is lower than that of the first cylinder 475.

[0055] Referring to Figure 5 and Figure 7In order to improve the convenience of maintenance, the vibration mechanism 47 and the adjusting mechanism 46 (except the extension plate 461) are mounted on the inner cylinder 412, and the inner cylinder 412 is detachably spliced by multiple cylinder bodies, and the cylinder body is composed of two parts divided into upper and lower parts, so as to maintain the parts inside the inner cylinder 412.

[0056] During the movement of the adjusting block 462 with the sliding block 424, the second cylinder 474 on the adjusting block 462 moves synchronously, and when the second cylinder 474 is in contact with the first cylinder 475, the first cylinder 475 applies a downward pressure to the vibration block 472, so that the vibration block 472 moves downward, and when the second cylinder 474 moves away from the first cylinder 475, the vibration block 472 is reset upward under the elastic force of the installed spring, so that the vibration cylinder 473 knocks the inner wall of the hinge part of the scraper arm 421 of the rotating drum 41, so as to reciprocate, and in the cleaning process, the targeted vibration and knocking of the hinge part of the scraper arm 421 are realized, which is helpful for the rapid falling of the crystal.

[0057] Compared with the mode of disassembling the scraper stirring unit 4 as a whole, then using a vibrator or a rubber hammer to vibrate or knock, the above-mentioned mode is more convenient and fast; compared with the mode of adding a pulse generator in the nozzle washing system, no high-frequency on-off valve is needed, and no complex control system is needed, the control cost is low, and the vibration mechanism 47 is located inside the rotating drum 41, and does not directly contact with wastewater and crystal, so frequent maintenance is not needed.

[0058] In order to avoid that the vibration block 472 vibrates the scraper arm 421 due to the change of the rotating speed of the rotating drum 41 during work, which affects the crystallization effect or causes structural fatigue, the vibration mechanism 47 is improved as follows: referring to Figure 6 , the second cylinder 474 is slidably connected with the vibration block 472 along the length direction of the rotating drum 41, the vibration block 472 is internally provided with a receiving groove for receiving the second cylinder 474, and the second cylinder 474 on the same side of the vibration block 472 is located at one end of the receiving groove and is jointly mounted with a connecting plate 476, and a cooperation spring is connected between the connecting plate 476 and the receiving groove.

[0059] Referring to Figure 6 and Figure 8 , the outer wall of the water feeding pipe 45 is communicated and mounted with a telescopic pipe 477 corresponding to the vibration block 472, and the telescopic pipe 477 is mounted with a conical block 478 away from the water feeding pipe 45.

[0060] After the water pump introduces the cleaning liquid into the inside of the water delivery pipe 45, part of the cleaning liquid enters the telescopic pipe 477 and expands the telescopic pipe 477, so that the telescopic pipe 477 drives the conical block 478 to move close to the vibrating block 472, and the conical block 478 drives the second cylinder 474 originally located in the storage groove to move outward through the pushing action of the two side connecting plates 476, and then the second cylinder 474 can cooperate with the first cylinder 475 to make the vibrating block 472 reciprocate, so as to realize the targeted vibration of the hinge part of the scraper arm 421 and accelerate the falling of the crystal at the hinge part.

[0061] After the cleaning is completed, the cleaning liquid in the water delivery pipe 45 is completely pumped out by the water pump, the telescopic pipe 477 is retracted and drives the conical block 478 to move out from between the two side connecting plates 476, and the connecting plate 476 is reset by the spring, so that the second cylinder 474 moves into the storage groove, so that 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 part of the scraper arm 421, and thus will not affect the crystallization process and the reliability of the device structure.

[0062] It should be noted that, in order to ensure that the telescopic pipe 477 can be retracted to a position where the conical block 478 does not contact the connecting plate 476 after the cleaning liquid in the water delivery pipe 45 is completely pumped out, a spiral spring can be arranged between the telescopic pipe 477 and the water delivery pipe 45 to assist the telescopic pipe 477 to retract to the original state by the elastic force of the spiral spring.

[0063] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0064] In the description of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0065] In the description of the present application, it is also necessary to explain that, unless explicitly defined and limited, the terms "set", "connected", "mounted", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0066] The above describes in detail the high-potassium perchlorate preparation wastewater treatment device provided by the present application. For those skilled in the art, the specific implementation and application range of the present application will change according to the idea of the embodiment. In summary, the content of the present application should not be understood as a limitation.

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.

2. The potassium perchlorate preparation wastewater treatment device according to claim 1, characterized in that, 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.

3. The potassium perchlorate preparation wastewater treatment device according to claim 2, characterized in that, 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.

4. The potassium perchlorate preparation wastewater treatment device according to claim 3, characterized in that, 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.

5. The potassium perchlorate preparation wastewater treatment device according to claim 4, 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.

6. The potassium perchlorate preparation wastewater treatment device according to claim 5, 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.

7. The potassium perchlorate preparation wastewater treatment device according to claim 6, 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.

8. The potassium perchlorate preparation wastewater treatment device according to claim 7, 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.

9. 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.

10. A potassium perchlorate preparation wastewater treatment device according to claim 9, 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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