A waste acid buffer tank for a methyl methacrylate plant

Abstract

The present application relates to methyl methacrylate production equipment technical field, specifically disclose a kind of waste acid buffer tank for methyl methacrylate device, including tank body, foot stool, inlet, exhaust port and liquid discharge pipe, the core is in the top of tank body and is provided with flush and scrape washing mechanism: its push position structure is driven by cylinder three-stage support linkage lift scraping head structure, cooperate V-shaped rotating bar constraint transmission trajectory, make scraping head accurate positioning to tank wall arbitrary height;Scraping head structure is driven by double motor respectively and rotates in circumference and radially telescopic, hinged scraper plate is through slot self-adapting and is pasted conical tank bottom, simultaneously by spiral hose conveying flush fluid immediate flushing and peeling off;Protective shed structure is driven by motor L-shaped slot frame linkage door component, realize when cleaning unobstructed deployment and closed dynamic sealing.The present application solves the problem of waste acid fouling, corrosive medium erosion components and high-risk problem of artificial tank cleaning, with efficient buffering, self-adapting cleaning, long-term protection of core components and compact space deployment advantage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of methyl methacrylate production equipment, in particular to a waste acid buffer tank for a methyl methacrylate device. BACKGROUND

[0002] Methyl methacrylate (MMA) is a key raw material for organic glass (PMMA) monomer and special coating. Its industrial production mainly adopts the acetone cyanhydrin method. The waste acid generated at the end of the process contains high-concentration sulfuric acid and methyl methacrylate polymer, which is strongly corrosive, easily crystallizes and is temperature sensitive.

[0003] At present, Chinese patent application No. CN202421104830.4 discloses a waste acid buffer tank for a methyl methacrylate device, which comprises a support and a buffer tank. The top of the support is provided with the buffer tank. The waste acid buffer tank for the methyl methacrylate device further comprises a power device fixedly arranged at the top of the buffer tank and a cleaning member slidingly arranged at the bottom of the power device.

[0004] However, the waste acid buffer tank of the prior art is inconvenient to match the changes in the inclination of the inner side wall and the bottom of the tank body when in use through the fixed scraper. Moreover, the cleaning effect on the sulfate crystalline substance is affected by the fact that the tank is usually cleaned only by the mechanical scraper arm. In addition, the dynamic sealing protection is poor, the high-temperature acid mist of the waste liquid easily corrodes the components, affects the service life of the components, and causes manual tank cleaning to become a high-risk and high-frequency maintenance burden. SUMMARY

[0005] The present application aims to provide a waste acid buffer tank for a methyl methacrylate device to solve the problems raised in the background.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: a waste acid buffer tank for a methyl methacrylate device, comprising a tank body, a foot support, a liquid inlet, an exhaust port, a liquid discharge pipe and a flushing and scraping cleaning mechanism. The foot support is tightly fastened to the bottom of the tank body. The liquid inlet is formed in the upper middle part of the front part of the tank body. The exhaust port is arranged on the upper side of the rear part of the tank body. The bottom of the tank body is conical in shape, and the conical bottom is provided with the liquid discharge pipe. The flushing and scraping cleaning mechanism is tightly locked and fixed to the upper side of the inside of the tank body. The flushing and scraping cleaning mechanism comprises a tank cover tightly locked and fixed to the top side of the tank body. The tank cover is provided with a ring seat on the bottom outer side, and the outer surface of the ring seat is in contact with the inner wall of the tank body. The tank cover is tightly locked and fixed with a push position structure on the middle side of the bottom. The push position structure is connected with a flushing liquid pipe on the upper side of the inside. The push position structure is provided with a scraper head structure on the inner bottom side. The flushing liquid pipe is arranged through the inside of the tank cover. The push position structure and the scraper head structure are provided with a protective cage structure outside for preventing direct contact with high-temperature gas, and the protective cage structure is embedded in the inside of the ring seat on the outer upper side.

[0007] Preferably, the inner wall of the tank is embedded with heat exchange pipes, and the upper and lower ends of the heat exchange pipes are respectively provided with heat exchange inlet pipes and heat exchange outlet pipes, the heat exchange inlet pipes are arranged through the upper side of the side of the tank, and the heat exchange outlet pipes are arranged through the lower side of the side of the tank.

[0008] Preferably, the push position structure comprises a bearing frame fastened to the tank cover at the top, a first support fixedly connected to the bottom of the bearing frame, a pneumatic cylinder rotationally connected to the front top of the first support, a power rod connected to the bottom output shaft of the pneumatic cylinder, the power rod being rotationally connected to the first support at the left rear of the power rod, the first gear rotating rod being rotationally connected to the first support at the right end of the power rod, the second support being rotationally connected to the rear of the first gear rotating rod, the first gear rotating rod being meshed with the second gear rotating rod at the bottom, the second gear rotating rod being rotationally connected to the left lower front of the second support, the bottom rod being rotationally connected to the right end of the second gear rotating rod, the third support being rotationally connected to the rear of the bottom rod, the first support, the second support and the third support being arranged in parallel from top to bottom, a spiral hose being mounted in the bearing frame, the top end of the spiral hose being connected to the flushing liquid pipe, the spiral hose being arranged in the second support and the third support at the bottom of the first support, and the bottom end of the spiral hose being connected to the scraping head structure, the scraping head structure being fastened to the middle lower side of the third support.

[0009] Preferably, the first V-shaped rotating rod is rotationally arranged at the right rear of the first support and the second support, and the second V-shaped rotating rod is rotationally arranged at the right rear of the second support and the third support.

[0010] Preferably, the scraping head structure comprises a disc seat fastened to the middle lower side of the third support, a first motor fixedly arranged in the right side of the disc seat, a driving gear connected to the bottom output shaft of the first motor, a gear ring meshed and driven on the left side of the driving gear, a cover seat fixedly arranged on the middle side of the bottom of the gear ring, a second motor fixedly arranged in the left side of the cover seat, a first bevel gear connected to the bottom output shaft of the second motor, a second bevel gear meshed and driven on the left side of the first bevel gear, a first screw coaxially rotationally arranged on the right middle of the second bevel gear, a sleeve rod threadedly connected to the outer surface of the first screw, a cover frame fastened to the right end of the sleeve rod, a nozzle arranged in the right side of the cover frame, a first scraper fastened to the rear of the cover frame, and a second scraper rotationally connected to the bottom of the first scraper, the top middle side of the cover seat being rotationally connected to the disc seat, the left middle side of the second bevel gear being rotationally connected to the cover seat, the sleeve rod being slidably arranged in the right side of the cover seat, the bottom left side of the cover frame being rotationally connected to the second scraper, and the rear liquid inlet of the nozzle being connected to the spiral hose.

[0011] Preferably, the inside left side of the sleeve rod is provided with an internally threaded block threadedly connected with the first screw rod, and the upper and lower sides of the sleeve rod are provided with protrusions, both of which slide horizontally inside the right side of the cover base.

[0012] Preferably, the second scraper is arranged in an inclined manner, and a through slot is formed in the right side of the second scraper in an inclined manner, and a rotating column at the connection between the first scraper and the second scraper is arranged to penetrate into the through slot.

[0013] Preferably, the protective cage structure comprises a cage cover and first and second door assembly components arranged inside the cage cover on the left and right sides, respectively, the first and second door assembly components are the same in structure and size and are arranged in a left-right symmetrical manner, a rectangular opening is formed in the bottom of the cage cover, a sealing strip is arranged above the rectangular opening, and the top side of the sealing strip is in contact with the first and second door assembly components, respectively.

[0014] Preferably, the second door assembly component comprises a rectangular seat fixed to the top side of the cage cover, a third motor fixedly locked inside the back side of the rectangular seat, a second screw rod connected to the bottom output shaft of the third motor, an L-shaped groove frame fixed to the front bottom side of the rectangular seat, a displacement block longitudinally and slidingly connected to the front side of the L-shaped groove frame, a pull rod rotationally connected to the front bottom side of the displacement block, a first door plate rotationally connected to the back bottom side of the displacement block, and a second door plate rotationally connected to the side of the pull rod away from the displacement block, an internally threaded strip is arranged on the upper side of the back part of the displacement block, and the internally threaded strip is threadedly connected to the outer surface of the second screw rod inside the back side.

[0015] Preferably, the displacement block and the second screw rod are arranged on the front and back sides inside the cage cover, respectively, and do not interfere with the movement of the first and second door plates, a first roller is rotationally arranged on the left side of the front part of the first door plate, a second roller is rotationally arranged on the right side of the front part of the second door plate, and both the first and second rollers are slidingly connected inside the L-shaped groove frame.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] Based on the multi-layer transmission of the pushing structure and the self-adaptive design of the scraping head structure, the present application combines mechanical scraping and fluid flushing functions: the pushing mechanism drives the scraping head to accurately position at any height of the tank wall, the rotating assembly realizes 360° circumferential coverage, the telescopic scraper is automatically attached to the wall surface with different inclination angles through the hinge structure and the through slot, especially for the conical bottom to realize no dead angle scraping; the synchronously sprayed flushing liquid instantly flushes away the peeled material, completely solves the problem of scaling and blockage caused by strongly corrosive waste acid, and greatly reduces the equipment maintenance frequency and intensity.

[0018] The protective cage structure of the application realizes dynamic sealing through the blocking door linkage mechanism: when cleaning, the blocking door is stably unfolded along the L-shaped groove frame and stored in the side wall of the cage cover, providing an unobstructed passage for the movement of the scraping head; after the operation is completed, the blocking door is accurately closed and the sealing strip is pressed tightly, forming a barrier to isolate the high-temperature corrosive medium, ensuring the efficient operation of the impact and scraping washing mechanism, and avoiding the acid mist corrosion of the core components such as gear transmission assembly and motor, significantly prolonging the overall service life of the equipment.

[0019] The application ensures that the deposits in the waste acid liquid are efficiently collected to the liquid discharge port through the cooperative design of the conical tank bottom and the embedded heat exchange pipe, and the heat exchange medium circulates in the tank wall to accurately control the material temperature, fundamentally avoiding the decomposition or crystallization of waste acid caused by temperature fluctuation; cooperate with the dynamic maintenance of tank pressure balance through the exhaust port, the three synergies make the waste acid keep stable physical and chemical properties during the temporary storage process, and provide a safe and reliable buffer environment for the downstream processing link.

[0020] The application realizes efficient deployment of multifunctional modules in limited tank space through the high integration of the impact and scraping washing mechanism and the dynamic expansion mechanism of the protective cage structure: the folding transmission bracket of the push position structure and the compact arrangement of the spiral hose significantly compress the longitudinal space occupation, so that the cleaning component is completely stored in the protective cage in the non-working state, creating the possibility for narrow factory deployment. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the application;

[0022] Figure 2 It is a structural schematic diagram of the tank body inside the application;

[0023] Figure 3 It is a structural schematic diagram of the impact and scraping washing mechanism of the application;

[0024] Figure 4 It is a structural schematic diagram of the push position structure of the application;

[0025] Figure 5 It is a structural schematic diagram of the scraping head structure of the application;

[0026] Figure 6 It is a structural schematic diagram of the protective cage structure of the application;

[0027] Figure 7 It is a connection structure schematic diagram of the L-shaped groove frame and the first roller and the second roller of the application.

[0028] In the figure: tank body-2, foot support-1, liquid inlet-3, exhaust port-4, liquid discharge pipe-5, flushing and scraping mechanism-6, heat exchange liquid inlet pipe-7, heat exchange liquid outlet pipe-8, tank cover-61, ring seat-62, push position structure-63, flushing liquid pipe-64, scraper head structure-65, protective cover structure-66, bearing frame-631, first support-632, air cylinder-633, power rod-634, first gear rotating rod-635, second support-636, second gear rotating rod-637, bottom rod-638, third support-639, spiral hose-6310, first V-shaped rotating rod-6321, second V-shaped rotating rod-6361, disc seat-651, first motor-652, gear wheel-653, gear ring-654, cover seat-655, second motor-656, first bevel gear-657, second bevel gear-658, first screw-659, sleeve rod-6510, cover frame-6511, spray head-6512, first scraper-6513, second scraper-6514, slot-65141, cover-661, first door assembly-662, second door assembly-663, rectangular seat-6631, third motor-6632, second screw-6633, L-shaped slot frame-6634, displacement block-6635, pull rod-6636, first door plate-6637, second door plate-6638, first roller-66371, second roller-66381. DETAILED DESCRIPTION

[0029] In order to further explain the technical solutions of the present application, specific embodiments are described in detail below.

[0030] Please refer to Figure 1 and Figure 2 , the present application provides a waste acid buffer tank for methyl methacrylate device, including tank body 2, foot support 1, liquid inlet 3, exhaust port 4, liquid discharge pipe 5 and flushing and scraping mechanism 6, the tank body 2 bottom is fastened with foot support 1, the tank body 2 front part upper side is provided with liquid inlet 3 for receiving waste acid liquid from upstream process, the tank body 2 rear part upper side is provided with exhaust port 4, the tank body 2 bottom is conical shape, and the conical shape bottom is installed with liquid discharge pipe 5, in order to completely discharge the liquid and sediment in the tank body 2, the tank body 2 inside upper side is locked and fixed with flushing and scraping mechanism 6 for flushing and scraping cleaning of the tank body inner wall, in order to prevent fouling and blockage in the tank body 2, the tank body 2 inner wall is embedded with heat exchange pipe, and the heat exchange pipe upper and lower ends are respectively provided with heat exchange liquid inlet pipe 7 and heat exchange liquid outlet pipe 8, the heat exchange liquid inlet pipe 7 is throughly arranged in the tank body 2 side part upper side, the heat exchange liquid outlet pipe 8 is throughly arranged in the tank body 2 side part lower side, in order to pass into heat exchange medium, realize the control of the material temperature in the tank body 2.

[0031] Please refer to Figure 1 , Figure 2 and Figure 3The application provides a waste acid buffer tank for a methyl methacrylate device, and the flushing and scraping mechanism 6 comprises a tank cover 61 fastened to the top side of the tank body 2, an annular seat 62 is arranged on the bottom outer side of the tank cover 61, and the outer surface of the annular seat 62 is in contact with the inner wall of the tank body 2, so as to enhance the stability of the mechanism in the tank body 2, a push position structure 63 is locked and fixed to the middle side of the bottom of the tank cover 61, a flushing liquid pipe 64 is connected to the inner upper side of the push position structure 63, a scraping head structure 65 is installed on the inner bottom side of the push position structure 63, the push position structure 63 provides driving force for the scraping head structure 65, so that the scraping head structure 65 moves up and down along the tank wall to change position, the flushing liquid pipe 64 is arranged through the inside of the tank cover 61, so as to introduce flushing liquid from outside the tank body 2, so that the flushing liquid is conveyed into the scraping head structure 65 after passing through the push position structure 63, so as to perform scraping and flushing actions on the tank wall to remove attached matters, the push position structure 63 and the scraping head structure 65 are provided with a protective cage structure 66 for preventing direct contact with high-temperature gas, and the protective cage structure 66 is embedded into the inside of the annular seat 62 on the outer upper side, so as to protect the internal precise transmission components from direct erosion of high-temperature, corrosive gas or liquid in the tank.

[0032] Please refer to Figure 3 、 Figure 4 and Figure 5 The application provides a waste acid buffer tank for a methyl methacrylate device, and the push position structure 63 comprises a bearing frame 631 fastened to the top of the tank cover 61, a first support 632 is fixedly connected to the bottom of the bearing frame 631, a gas cylinder 633 is rotationally connected to the top front side of the first support 632, and a power rod 634 is connected to the bottom output shaft of the gas cylinder 633, so that the gas cylinder 633 is used as a power source to transmit telescopic movement to the power rod 634, the power rod 634 is rotationally connected to the first gear rotating rod 635 at the end away from the first support 632, the first gear rotating rod 635 is rotationally connected to the second support 636 at the rear end away from the power rod 634, the bottom of the first gear rotating rod 635 is meshed with the second gear rotating rod 637, and the second gear rotating rod 637 is rotationally connected to the front left lower side of the second support 636, so that the first gear rotating rod 635 and the second gear rotating rod 637 are meshed to change the movement direction and transmit power through the support point of the second support 636.

[0033] The second gear rotating rod 637 is rotatably connected with the bottom rod 638 at one end away from the first gear rotating rod 635, and transmits the movement to the structure below. The bottom rod 638 is rotatably connected with the third support 639 at the rear end away from the second gear rotating rod 637, and the third support 639 provides a support point for the bottom rod 638. The first support 632, the second support 636 and the third support 639 are arranged in parallel from top to bottom, forming a multi-layer stable structure to ensure stable transmission. The inside of the bearing frame 631 is provided with a spiral hose 6310. The top end of the spiral hose 6310 is connected with the washing liquid pipe 64. The spiral hose 6310 located at the bottom side of the first support 632 spirally distributes inside the second support 636 and the third support 639, and the bottom end of the spiral hose 6310 is connected with the scraper head structure 65, providing flexible connection, allowing the washing liquid pipe 64 and the moving scraper head structure 65 to continuously transport washing liquid without being pulled and damaged. The scraper head structure 65 is fastened to the middle and lower side inside the third support 639, so that the scraper head structure 65 moves with the push position structure 63 as a whole to change the height position.

[0034] The first V-shaped rotating rod 6321 is rotatably arranged at the right rear part of the first support 632, and the middle connecting part of the first V-shaped rotating rod 6321 is located at the same horizontal height as the connecting part of the power rod 634 and the first gear rotating rod 635. The second V-shaped rotating rod 6361 is rotatably arranged at the right rear part of the second support 636 and the third support 639, and the middle connecting part of the second V-shaped rotating rod 6361 is located at the same horizontal height as the connecting part of the second gear rotating rod 637 and the bottom rod 638. The first V-shaped rotating rod 6321 and the second V-shaped rotating rod 6361 are arranged at the side parts of the three supports respectively to play a limiting and auxiliary supporting role, preventing the second support 636 and the third support 639 from moving downward or upward and causing position deviation, and ensuring the transmission accuracy and stable amplification effect.

[0035] The scraper head structure 65 includes a disc seat 651 fastened to the middle and lower side inside the third support 639, a first motor 652 locked and fixed to the right side inside the disc seat 651, a driving gear 653 connected to the bottom output shaft of the first motor 652, a gear ring 654 meshing and transmitting with the left side of the driving gear 653, and a cover seat 655 fixed horizontally to the bottom middle side of the gear ring 654. The first motor 652 provides rotary power to drive the driving gear 653 to drive the gear ring 654 to transmit rotary motion to the cover seat 655 to provide an installation base, and drive the components below to rotate.

[0036] The second motor 656 is fixed inside the left side of the cover base 655, the first bevel gear 657 is connected to the output shaft of the bottom of the second motor 656, the second bevel gear 658 is engaged and driven on the left bottom of the first bevel gear 657, the first screw rod 659 is coaxially rotated on the right middle part of the second bevel gear 658, the second motor 656 transmits horizontal rotary motion to the first screw rod 659 through two bevel gears, the sleeve rod 6510 is connected to the outer surface of the first screw rod 659, and the rotary motion of the first screw rod 659 is converted into linear motion of the sleeve rod 6510, the cover frame 6511 is fastened to the right end of the sleeve rod 6510, the nozzle 6512 is arranged inside the right side of the cover frame 6511, the first scraper 6513 is fastened to the rear side of the cover frame 6511, and the second scraper 6514 is rotationally connected to the bottom of the first scraper 6513, the rotation design between the first scraper 6513 and the second scraper 6514 can better adapt to the conical bottom or uneven surface of the tank wall, and the scraping effect is enhanced, the top middle side of the cover base 655 is rotationally connected with the disc base 651, allowing the cover base 655 and the upper parts thereof to rotate as a whole around a vertical axis, the left middle part of the second bevel gear 658 is rotationally connected with the cover base 655, the sleeve rod 6510 is slid through the right inside of the cover base 655, the bottom left side of the cover frame 6511 is rotationally connected with the second scraper 6514, so that the second scraper 6514 can slightly rotate relative to the cover frame 6511 to better fit the tank wall, and the rear liquid inlet of the nozzle 6512 is connected with the spiral hose 6310, so that the nozzle 6512 receives the flushing liquid from the spiral hose 6310.

[0037] The left side of the inside of the sleeve rod 6510 is provided with an internal threaded block threadedly connected with the first screw rod 659, realizing threaded transmission between the sleeve rod 6510 and the first screw rod 659, and converting rotary motion into linear motion, the upper and lower sides of the sleeve rod 6510 are both provided with protrusions, forming sliding guide keys, both of which slide horizontally inside the right side of the cover base 655, limiting the sleeve rod 6510 to only linear motion and preventing rotation, ensuring stable scraping direction, the second scraper 6514 is arranged in an inclined manner, and a through slot 65141 is formed in an inclined manner on the right side of the second scraper 6514, a rotating column at the connection between the first scraper 6513 and the second scraper 6514 is arranged inside the through slot 65141, providing a space for the rotating shaft between the first scraper 6513 and the second scraper 6514 to change the included angle within a certain range to adapt to the wall surface.

[0038] Please refer to Figure 3 , Figure 6 and Figure 7The application provides a waste acid buffer tank for a methyl methacrylate device, and the protective cabin structure 66 comprises a cabin cover 661, a first door stopper assembly 662 and a second door stopper assembly 663 arranged on the left and right sides of the cabin cover 661 respectively, the first door stopper assembly 662 and the second door stopper assembly 663 are symmetrical in structure and size, and are arranged in a left-right symmetrical manner, so that the bilateral synchronous opening and closing can be realized, a rectangular-shaped opening is formed in the bottom of the cabin cover 661 to provide a channel for the extension of the scraping head structure 65, a sealing strip is arranged above the rectangular-shaped opening, the top side of the sealing strip is in contact with the first door stopper assembly 662 and the second door stopper assembly 663 respectively, so that the opening in the bottom of the cabin cover 661 is closed or opened by the first door stopper assembly 662 and the second door stopper assembly 663, the internal mechanism is protected or the scraping head structure 65 is allowed to extend and work, and the sealing is provided when the two door stopper assemblies are closed, so that the medium in the tank does not enter the inside of the cabin cover 661.

[0039] The second door stopper assembly 663 comprises a rectangular seat 6631 fixed to the top side of the cabin cover 661, a third motor 6632 fixedly connected to the rear side of the inside of the rectangular seat 6631, a second screw rod 6633 connected to the output shaft at the bottom of the third motor 6632, an L-shaped groove frame 6634 fixed to the front side of the bottom of the rectangular seat 6631, a displacement block 6635 longitudinally and slidingly connected to the front side of the L-shaped groove frame 6634, an internally-threaded strip arranged on the rear upper side of the displacement block 6635, and the internally-threaded strip is threadedly connected to the outer surface of the second screw rod 6633 at the rear inside, so that the third motor 6632 is used as a power source to convert the rotary motion into the linear motion of the displacement block 6635, a pull rod 6636 rotatably connected to the front bottom side of the displacement block 6635, a first door plate 6637 rotatably connected to the rear bottom side of the displacement block 6635, and a second door plate 6638 rotatably connected to the side of the pull rod 6636 away from the displacement block 6635, so that the linear motion of the displacement block 6635 is converted into the opening and closing motion of the two door plates, the two door plates are moved in linkage, and the opening or closing is formed above the opening in the bottom of the cabin cover 661.

[0040] The displacement block 6635 and the second screw rod 6633 are respectively arranged on the front and rear sides of the inside of the cabin cover 661, do not interfere with the motion of the first door plate 6637 and the second door plate 6638, and ensure smooth opening and closing of the door stopper, the first door plate 6637 is rotatably arranged on the left side of the front of the first door plate 6637, the second door plate 6638 is rotatably arranged on the right side of the front of the second door plate 6638, the first roller 66371 and the second roller 66381 are slidingly connected to the inside of the L-shaped groove frame 6634, and accurate guidance is provided for the motion of the two door plates, so that the door plates are stably opened and closed along the track of the L-shaped groove frame 6634, the two door plates are sequentially slid into the sidewall position of the cabin cover 661 when opened, do not interfere with the scraping head structure 65, are accurately positioned when closed, and ensure the sealing effect after being closed.

[0041] The working principle of the waste acid buffer tank for methyl methacrylate device is as follows:

[0042] First, waste acid treatment and temperature control:

[0043] When the waste acid liquid generated by the upstream process enters the tank body 2 through the liquid inlet 3, the conical tank bottom design allows the liquid and sediment to naturally collect at the liquid discharge pipe 5. At the same time, the heat exchange pipe embedded in the inner wall of the tank body 2 is connected to the external heat exchange medium. The medium flows into the heat exchange inlet pipe 7, circulates through the heat exchange pipe, and then is discharged from the heat exchange outlet pipe 8, achieving precise temperature control of the materials in the tank. When the waste acid liquid enters the tank body 2, the exhaust port 4 continuously discharges high-temperature and reaction gas, maintaining the pressure balance inside the tank body 2.

[0044] Second, positioning and protection of the flushing and scraping mechanism:

[0045] When the cleaning program is not performed, the warehouse cover 661 of the warehouse protection structure 66 wraps the push position structure 63 and the scraping head structure 65, and the sealing strip on the warehouse cover 661 tightly fits the bottom of the first and second door components 662 and 663, isolating the corrosive medium. When the cleaning program is started, the bottom of the first and second door components 662 and 663 is opened, then the power rod 634 is driven to move by the air cylinder 633 of the push position structure 63, the power direction is converted by the meshing of the first and second gear rotating rods 635 and 637, the bottom rod 638 is connected to drive the third support 639 to rise and fall as a whole, the first and second V-shaped rotating rods 6321 and 6361 respectively constrain the displacement trajectories of the first, second, and third supports 632, 636, and 639 to prevent transmission deviation. During the movement process, the spiral hose 6310 expands and deforms with the downward movement of the second and third supports 636 and 639, continuously delivering the flushing liquid to the scraping head structure 65;

[0046] Third, combined cleaning of scraping and flushing:

[0047] When the scraping head structure 65 is accurately positioned to the target height by the pushing position structure 63, the cleaning action is started synchronously, the first motor 652 drives the driving gear 653 to engage the gear ring 654, drives the cover seat 655 and the bottom assembly to rotate around the vertical shaft, drives the spray head 6512 to cover the entire circumferential area of the tank wall, then the second motor 656 is controlled to start, the power output by the second motor 656 is transmitted to the second bevel gear 658 through the first bevel gear 657, is converted into horizontal axial rotation to drive the first screw rod 659 to rotate, the sleeve rod 6510 is engaged with the first screw rod 659 through the internal threaded block, under the sliding constraint of the upper and lower convex strips and the cover seat 655, converts the rotary motion into horizontal linear motion, drives the cover frame 6511 to drive the first scraper 6513 to abut against the tank wall in the radial direction, the flushing liquid is transported to the spray head 6512 through the spiral hose 6310 to flush the adhering objects in time, the first scraper 6513 and the second scraper 6514 are adaptively adjusted in angle through the slot 65141 when located at the bottom position, the bottom of the second scraper 6514 abuts against the conical bottom of the tank body 2 when the scraping head structure 65 moves to the bottom side, so that the scraping effect on the bottom side of the tank body 2 is ensured;

[0048] Fourth, the opening and closing and sealing of the protective shed:

[0049] Before cleaning, the third motor 6632 in the first door assembly 662 and the second door assembly 663 is started to drive the second screw rod 6633 to rotate, the displacement block 6635 is moved upward along the L-shaped groove frame 6634, the first door plate 6637 and the second door plate 6638 are slid upward into the sidewall position of the shed 661 through the pull rod 6636, so that the bottom position is opened, and the scraping head structure 65 and the pushing position structure 63 are moved out for cleaning; after the cleaning is completed, the third motor 6632 is reversed to move the displacement block 6635 downward, drives the first roller 66371 and the second roller 66381 to roll along the L-shaped groove frame 6634 to close the first door plate 6637 and the second door plate 6638 above the through hole at the bottom of the shed 661, and the sealing strip is compressed to form a barrier, so that the components in the shed 661 are protected.

[0050] The above only describes the preferred examples of the present application and is not used to limit the present application. Although the present application is described in detail with reference to the foregoing examples, those skilled in the art can still modify the technical solutions recorded in the foregoing examples or equivalently replace some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A waste acid buffer tank for a methyl methacrylate device, comprising a tank body (2), a foot stand (1) is fastened to the bottom of the tank body (2), a liquid inlet (3) is formed in the upper middle of the front of the tank body (2), an exhaust port (4) is arranged on the upper side of the rear of the tank body (2), the bottom of the tank body (2) is in a conical shape, and a liquid discharge pipe (5) is installed at the bottom of the conical shape, characterized in that: The inside upper side of the tank body (2) is locked and fixed with a flushing and scraping washing mechanism (6), the flushing and scraping washing mechanism (6) comprises a tank cover (61) fastened to the top side of the tank body (2), the bottom outer side of the tank cover (61) is provided with a ring seat (62), and the outer surface of the ring seat (62) is in contact with the inner wall of the tank body (2), the bottom middle side of the tank cover (61) is locked and fixed with a push position structure (63), the inside upper side of the push position structure (63) is connected with a flushing liquid pipe (64), the bottom inner side of the push position structure (63) is installed with a scraping head structure (65), the flushing liquid pipe (64) is provided in the inside of the tank cover (61), the outside of the push position structure (63) and the scraping head structure (65) is provided with a protective shed structure (66) for preventing direct contact with high temperature gas, and the outside upper side of the protective shed structure (66) is embedded in the inside of the ring seat (62); The push position structure (63) comprises a bearing frame (631) fastened to the top of the tank cover (61), the bottom of the bearing frame (631) is fixedly connected with a first support (632), the top front side of the first support (632) is rotatably connected with a gas cylinder (633), and the bottom output shaft of the gas cylinder (633) is connected with a power rod (634), the rear left side of the power rod (634) is rotatably connected with the first support (632), and the end of the power rod (634) away from the first support (632) is rotatably connected with a first gear rotating rod (635), the rear end of the end of the first gear rotating rod (635) away from the power rod (634) is rotatably connected with a second support (636), and the bottom of the first gear rotating rod (635) is engaged with a second gear rotating rod (637), the second gear rotating rod (637) is rotatably connected to the front left lower side of the second support (636), the end of the second gear rotating rod (637) away from the first gear rotating rod (635) is rotatably connected with a bottom rod (638), and the rear end of the end of the bottom rod (638) away from the second gear rotating rod (637) is rotatably connected with a third support (639), the first support (632), the second support (636) and the third support (639) are arranged in parallel from top to bottom, a spiral hose (6310) is installed in the inside of the bearing frame (631), the top end of the spiral hose (6310) is connected with the flushing liquid pipe (64), the spiral hose (6310) located at the bottom side of the first support (632) is spirally arranged in the inside of the second support (636) and the third support (639), and the bottom end of the spiral hose (6310) is connected with the scraping head structure (65), and the scraping head structure (65) is fastened to the inside middle lower side of the third support (639); The scraper head structure (65) comprises a disc seat (651) fixed to the inner lower side of the third support (639), a first motor (652) fixed to the inner right side of the disc seat (651), a driving gear (653) connected to the output shaft at the bottom of the first motor (652), a gear ring (654) meshingly driven to the left side of the driving gear (653), a cover seat (655) fixed horizontally to the bottom middle side of the gear ring (654), a second motor (656) fixed through the inner left side of the cover seat (655), a first bevel gear (657) connected to the output shaft at the bottom of the second motor (656), a second bevel gear (658) meshingly driven to the left bottom of the first bevel gear (657), a first screw rod (659) coaxially rotating to the right middle part of the second bevel gear (658), a sleeve rod (6510) threadedly connected to the outer surface of the first screw rod (659), a cover frame (6511) fixed to the right end of the sleeve rod (6510), a nozzle (6512) arranged to the inner right side of the cover frame (6511), a first scraper (6513) fixed to the rear side of the cover frame (6511), and a second scraper (6514) rotationally connected to the bottom of the first scraper (6513), the top middle side of the cover seat (655) is rotationally connected with the disc seat (651), the left middle part of the second bevel gear (658) is rotationally connected with the cover seat (655), the sleeve rod (6510) penetrates and slides in the right inner side of the cover seat (655), the bottom left side of the cover frame (6511) is rotationally connected with the second scraper (6514), and the rear liquid inlet of the nozzle (6512) is connected with the spiral hose (6310).

2. The waste acid surge tank for a methyl methacrylate plant of claim 1, wherein: The inner wall of the tank body (2) is embedded with heat exchange pipes, and the upper and lower ends of the heat exchange pipes are respectively provided with heat exchange liquid inlet pipes (7) and heat exchange liquid outlet pipes (8). The heat exchange liquid inlet pipes (7) are penetratingly arranged on the middle upper side of the side of the tank body (2), and the heat exchange liquid outlet pipes (8) are penetratingly arranged on the lower side of the side of the tank body (2).

3. The waste acid surge tank for a methyl methacrylate plant of claim 1, wherein: The first V-shaped rotating rod (6321) is rotationally arranged on the right rear part of the first support (632), and the middle connecting part of the first V-shaped rotating rod (6321) is located at the same horizontal height as the connecting parts of the power rod (634) and the first gear rotating rod (635). The second V-shaped rotating rod (6361) is rotationally arranged on the right rear part of the second support (636), and the middle connecting part of the second V-shaped rotating rod (6361) is located at the same horizontal height as the connecting parts of the second gear rotating rod (637) and the bottom rod (638).

4. The waste acid surge tank for a methyl methacrylate plant of claim 1, wherein: The inner left side of the sleeve rod (6510) is provided with an internal thread block threadedly connected with the first screw rod (659), and the upper and lower sides of the sleeve rod (6510) are both provided with protrusions, and the two protrusions are horizontally slid in the right inner side of the cover seat (655).

5. The waste acid surge tank for a methyl methacrylate plant of claim 1, wherein: The second scraper (6514) is arranged in an inclined manner, and a through slot (65141) is formed in the right side of the second scraper (6514) in an inclined manner. The rotating column at the connecting part of the first scraper (6513) and the second scraper (6514) penetrates the through slot (65141).

6. The waste acid surge tank for a methyl methacrylate plant of claim 1, wherein: The protection warehouse structure (66) comprises a warehouse cover (661), a first door assembly (662) and a second door assembly (663) arranged on the left and right sides of the warehouse cover (661) respectively, the first door assembly (662) and the second door assembly (663) are symmetrical in structure and size, the bottom of the warehouse cover (661) is provided with a rectangular opening, and a sealing strip is arranged above the rectangular opening.

7. The waste acid surge tank for a methyl methacrylate plant of claim 6, wherein: The second door assembly (663) comprises a rectangular seat (6631) fixed to the top side of the warehouse cover (661), a third motor (6632) fixed to the rear side of the inside of the rectangular seat (6631), a second screw rod (6633) connected to the bottom output shaft of the third motor (6632), an L-shaped groove frame (6634) fixed to the front bottom side of the rectangular seat (6631), a displacement block (6635) longitudinally and slidingly connected to the front side of the L-shaped groove frame (6634), a pull rod (6636) rotationally connected to the front bottom side of the displacement block (6635), a first door plate (6637) rotationally connected to the rear bottom side of the displacement block (6635), and a second door plate (6638) rotationally connected to the side away from the displacement block (6635) of the pull rod (6636), and an internally threaded strip is arranged on the rear upper side of the displacement block (6635), and the internally threaded strip is threadedly connected to the outer surface of the second screw rod (6633).

8. The waste acid surge tank for a methyl methacrylate plant of claim 7, wherein: The displacement block (6635) and the second screw rod (6633) are respectively arranged on the front and rear sides of the inside of the warehouse cover (661), and do not interfere with the movement of the first door plate (6637) and the second door plate (6638), a first roller (66371) is rotationally arranged on the left front side of the first door plate (6637), a second roller (66381) is rotationally arranged on the right front side of the second door plate (6638), and the first roller (66371) and the second roller (66381) are slidingly connected to the inside of the L-shaped groove frame (6634).

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