Redissolving device for unqualified urea

Abstract

The utility model relates to an unqualified urea remelting device which comprises a recovery tank, a first protection box is arranged on one side of the recovery tank, a first single-shaft-extension motor is arranged in the first protection box, an output shaft of the first single-shaft-extension motor is upwards and fixedly connected with a rotating disc, an inverted-L-shaped support is arranged on the rotating disc, and a hydraulic cylinder is arranged on the horizontal part of the support. A piston rod of the hydraulic cylinder is downwards and fixedly connected with a second protection box, a second single-shaft-extension motor is arranged in the second protection box, an output shaft of the second single-shaft-extension motor is downwards and fixedly connected with an inverted-U-shaped rotating plate, a third protection box is arranged on one vertical part of the rotating plate, a rotating shaft is rotationally arranged on the other vertical part of the rotating plate, and a double-shaft-extension motor is arranged in the third protection box. A net cylinder is detachably arranged between the tail end of one output shaft, close to the rotating shaft, of the double-shaft-extension motor and the end, close to the third protection box, of the rotating shaft. The tail end of the other output shaft of the double-shaft-extension motor and the other end of the rotating shaft are fixedly connected with disc turbine stirrers. The urea dissolving device can improve the dissolving efficiency and quality through multidirectional movement of urea, and is more practical.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of urea production, and particularly relates to a re-melting device for unqualified urea. BACKGROUND

[0002] Currently, in the production process of urea, due to factors such as fluctuations in production lines and equipment, the problem of the generation of unqualified urea generally exists, and unqualified urea is not easy to sell and has a low price, so it will be re-melted, recovered into urea, and then added to the evaporation system to mix with the urea in the original production line, remove excess moisture, and granulate, thereby producing qualified urea particles. When melting the unqualified urea, the existing method is to first send the unqualified urea into the corresponding recovery equipment, and then add a certain temperature and a certain amount of process condensate for melting and dissolution. However, since the urea is stationary, the overall melting rate is slow, the melting quality is not high, and it is not conducive to subsequent processing, which needs to be improved. UTILITY MODEL CONTENTS

[0003] In view of this, the purpose of the utility model is to provide a re-melting device for unqualified urea, which can improve the efficiency and quality of melting through the multidirectional movement of urea to solve the above problems.

[0004] In order to achieve the above object, the utility model adopts the technical scheme: a kind of unqualified urea re-melting device, including recovery tank, process condensate input pipeline is communicated on the upper portion of one side of the recovery tank, solution output pipeline is communicated in the bottom, the first protective box is equipped in the side of the recovery tank, first single-shaft extension motor is fixed in the first protective box, the output shaft of the first single-shaft extension motor is upwards and is fixedly connected with carousel and is fixedly connected with inverted U-shaped rotating plate, the second single-shaft extension motor is fixed in the second protective box, the output shaft of the second single-shaft extension motor is downwards and is fixedly connected with inverted U-shaped rotating plate, the rotating plate is inserted into recovery tank and its one vertical portion is fixedly connected with third protective box and is rotatably provided with rotating shaft, double-shaft extension motor is fixed in the third protective box, the two output shafts of the double-shaft extension motor are all inserted into third protective box and its one output shaft tail end close to rotating shaft and the one end of rotating shaft close to third protective box are all fixedly connected with U-shaped mounting seat, the openings of two mounting seats are oppositely arranged and the upper portions of the openings are all provided with first internal thread through hole, and the lower portions of the openings are all provided with internal thread blind hole, net cylinder is arranged between two mounting seats, mounting plate is fixedly connected on the left and right outer sides of the net cylinder, second internal thread through hole is formed in the mounting plate, the mounting plate is inserted into the mounting seat on the same side and the first internal thread through hole, second internal thread through hole and internal thread blind hole on the same side are correspondingly arranged and are screw-connected with same butterfly bolt, the other end of the other output shaft of the double-shaft extension motor and the other end of rotating shaft are all fixedly connected with disc turbine agitator.

[0005] Preferably, the process condensate input pipeline is provided with an inlet control valve and a metering pump.

[0006] Preferably, the solution output pipeline is provided with an outlet control valve and a transfer pump.

[0007] Preferably, the net cylinder comprises a cylinder body and a cylinder cover arranged above the cylinder body, the top of the cylinder body is open and fixedly connected with an external thread connecting ring, the bottom of the cylinder cover is fixedly connected with an internal thread connecting ring, and the internal thread connecting ring is threadedly sleeved with the external thread connecting ring.

[0008] Preferably, the lower portion of the recovery tank is connected with a saturated steam input pipeline, a plurality of concentric ring pipes are arranged in the lower portion of the recovery tank, the ring pipes are connected through cross pipes, a plurality of injection holes are formed in the top of each ring pipe, and the outer side of the outermost ring pipe is connected with the saturated steam input pipeline.

[0009] Preferably, the saturated steam input pipeline is provided with a flow regulating valve.

[0010] The utility model discloses a beneficial effect is: initial state, the rotary plate is located at the recovery groove outside one side and is placed in the lower position. When the unqualified urea is dissolved again, a plurality of net tubes can be prepared in advance, and the unqualified urea is loaded into the net tube, and then a net tube is installed between the two mounting seat, and the specific is: first, the mounting plate on the two sides of the net tube is aligned with the corresponding mounting seat and is inserted into the position, makes the second internal thread through -hole with corresponding first internal thread through -hole and internal thread blind hole alignment, and then the butterfly bolt of convenient hand screw operation is screwed into the position, and the net tube can be fixed and installed between the two mounting seat. Then, the hydraulic cylinder is operated, and the piston rod is retracted, drives the rotary plate whole and moves up to the height higher than the recovery groove, and then the first single -shaft extension motor is operated, and the rotary plate and the support whole are rotated 180 degrees, and the rotary plate can be rotated to the recovery groove above, and then the hydraulic cylinder is operated again, and the piston rod is elongated, and the rotary plate can be driven to move down into the recovery groove, and the unqualified urea feeding is completed. Then, the process condensate input pipeline is used to input the appropriate process condensate into the recovery groove, and the re-dissolution can be carried out. During the dissolving process, the operation of the second single -shaft extension motor can drive the rotary plate and the net tube whole to rotate on the horizontal plane, and the operation of the double -shaft extension motor can drive the net tube to rotate on the vertical plane under the cooperation of the rotary shaft, so that the net tube and the solid unqualified urea in it can move in multiple directions, so that the unqualified urea can be in contact with the process condensate more fully, and the two disc turbine agitator can also revolve with the rotary plate whole and rotate under the drive of the double -shaft extension motor and the rotary shaft, so that the solution can be further stirred efficiently and with high quality, and the cooperation can greatly enhance the dissolving effect, improve the efficiency and quality of the unqualified urea dissolving, and the setting of the net tube can also intercept the impurities and other insoluble substances carried by the unqualified urea in the net tube, which is more beneficial to subsequent treatment and more practical.

[0011] After the dissolving is completed, the urea solution can be discharged to the subsequent process through the solution output pipeline, then the hydraulic cylinder can be operated first, the piston rod is retracted, the rotary plate and the net tube are moved up out of the recovery groove, the first single -shaft extension motor is operated, the support is reversed 180 degrees, then the piston rod of the hydraulic cylinder is elongated, the rotary plate is lowered to the original position. At this time, the butterfly bolt is unscrewed, and the mounting plate is pushed out, so that the original net tube can be disassembled, then another net tube containing unqualified urea is installed according to the foregoing, and the dissolving operation can be continued, so that the feeding operation is more convenient, and it is also convenient to clean and maintain the parts on the rotary plate at the station, and the whole use is more flexible and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the front view structure schematic diagram of the utility model;

[0013] Fig. 2 It is the front view structure schematic diagram of the rotary plate and the upper part thereof of the utility model;

[0014] Fig. 3It is the main view structural schematic drawing of the mounting seat of the utility model;

[0015] Fig. 4 It is the main view structural schematic drawing of the net cylinder of the utility model;

[0016] Fig. 5 It is the plan view structural schematic drawing of the ring pipe of the utility model.

[0017] Marked number in the drawing: 1 is recovery tank, 2 is process condensate input pipeline, 3 is solution output pipeline, 4 is first protective box, 5 is first single-shaft extension motor, 6 is rotating disc, 7 is support, 8 is hydraulic cylinder, 9 is second protective box, 10 is second single-shaft extension motor, 11 is rotating plate, 12 is third protective box, 13 is rotating shaft, 14 is double-shaft extension motor, 15 is mounting seat, 16 is first internal thread through hole, 17 is internal thread blind hole, 18 is net cylinder, 19 is mounting plate, 20 is second internal thread through hole, 21 is butterfly bolt, 22 is disc turbine agitator, 23 is liquid inlet control valve, 24 is metering pump, 25 is liquid outlet control valve, 26 is transfer pump, 27 is cylinder body, 28 is cylinder cover, 29 is external thread connecting ring, 30 is internal thread connecting ring, 31 is saturated steam input pipeline, 32 is ring pipe, 33 is cross pipe, 34 is injection hole, 35 is flow regulating valve. DETAILED DESCRIPTION

[0018] The utility model will be described further in detail in combination with the specific embodiment and the drawing:

[0019] As Figs. 1 to 5As shown, a kind of re-dissolving device of unqualified urea, including recovery tank 1, process condensate input pipeline 2 is communicated on the upper portion of one side of recovery tank 1, and solution output pipeline 3 is communicated in the bottom.Recovery tank 1 is equipped with the first protective box 4 on one side, and the first single-shaft extension motor 5 is fixed in the first protective box 4, the output shaft of the first single-shaft extension motor 5 is upwards and is fixedly connected with the rotating disc 6, the inverted L-shaped support 7 is fixed on the rotating disc 6, the hydraulic cylinder 8 is vertically fixed on the horizontal portion of support 7, the piston rod of the hydraulic cylinder 8 is downwards and is fixedly connected with the second protective box 9, the second single-shaft extension motor 10 is fixed in the second protective box 9, the output shaft of the second single-shaft extension motor 10 is downwards and is fixedly connected with the inverted U-shaped rotating plate 11.Rotating plate 11 extends into recovery tank 1, and its one vertical portion is horizontally penetrated and is fixed with the third protective box 12, and the other vertical portion is horizontally penetrated and is rotatably provided with the rotating shaft 13, the double-shaft extension motor 14 is fixed in the third protective box 12, the two output shafts of the double-shaft extension motor 14 are all extended from the third protective box 12, and the output shaft tail end of the double-shaft extension motor 14 close to the rotating shaft 13 and the one end of the rotating shaft 13 close to the third protective box 12 are all fixed with the U-shaped mounting seat 15, the openings of the two mounting seats 15 are oppositely arranged, and the upper portions of the two mounting seats 15 are all provided with the first internal thread through hole 16, and the lower portions of the two mounting seats 15 are all provided with the internal thread blind hole 17.Two mounting seats 15 are equipped with the mesh tube 18, the left and right outer sides of the mesh tube 18 are both fixed with the mounting plate 19, the second internal thread through hole 20 is formed in the mounting plate 19, the mounting plate 19 is inserted on the mounting seat 15 on the same side, and the first internal thread through hole 16, the second internal thread through hole 20 and the internal thread blind hole 17 on the same side are correspondingly arranged and are screwed with the same butterfly bolt 21.The other output shaft tail end of the double-shaft extension motor 14 and the other end of the rotating shaft 13 are both fixedly connected with the disc turbine agitator 22;

[0020] In the initial state, the rotating plate 11 is located at the outside of the recovery tank 1 and placed at a lower position. When re-melting the unqualified urea, a plurality of mesh tubes 18 can be prepared in advance, and the unqualified urea is loaded into the mesh tube 18, and then a mesh tube 18 is installed between the two mounting seats 15. Specifically, the mounting plate 19 on both sides of the mesh tube 18 is aligned with the corresponding mounting seat 15 and is inserted into place, the second internal threaded hole 20 is aligned with the corresponding first internal threaded hole 16 and the internal threaded blind hole 17, and then the butterfly bolt 21 convenient for hand screwing operation is tightened into place, so that the mesh tube 18 is fixedly installed between the two mounting seats 15. Then, the hydraulic cylinder 8 is operated, the piston rod is retracted, the rotating plate 11 is driven to move upward as a whole to a height higher than the recovery tank 1, the first single-shaft extension motor 5 is operated, the rotating disc 6 and the support 7 are driven to rotate 180 degrees as a whole, the rotating plate 11 is rotated to above the recovery tank 1, and then the hydraulic cylinder 8 is operated again, the piston rod is elongated, the rotating plate 11 is driven to move downward into the recovery tank 1, and the feeding of the unqualified urea is completed. Then, a proper amount of process condensate is input into the recovery tank 1 through the process condensate input pipeline 2, and the re-melting is carried out. During the melting process, the operation of the second single-shaft extension motor 10 can drive the rotating plate 11 and the mesh tube 18 to rotate on the horizontal plane as a whole, and the operation of the double-shaft extension motor 14 can drive the mesh tube 18 to rotate on the vertical plane under the cooperation of the rotating shaft 13 arranged in rotation, so that the mesh tube 18 and the solid unqualified urea in it can move in multiple directions, so that the unqualified urea can be more fully contacted with the process condensate. At the same time, the two disc turbine agitators 22 can also revolve as a whole with the rotating plate 11 and rotate under the driving of the double-shaft extension motor 14 and the rotating shaft 13, which can further efficiently and high-quality stir the solution, and the cooperation can greatly enhance the melting effect and improve the efficiency and quality of the unqualified urea melting. In addition, the mesh tube 18 can also intercept the impurities and other insoluble substances carried by the unqualified urea inside the mesh tube 18, which is more conducive to subsequent processing and more practical.

[0021] After the melting is completed, the urea solution can be discharged to the subsequent process through the solution output pipeline 3, then the hydraulic cylinder 8 is operated first, the piston rod is retracted, the rotating plate 11 and the mesh tube 18 are driven to move upward out of the recovery tank 1, the first single-shaft extension motor 5 is operated, the support 7 is driven to reverse 180 degrees, then the piston rod of the hydraulic cylinder 8 is elongated, the rotating plate 11 is lowered to the original position. At this time, the butterfly bolt 21 is unscrewed, the mounting plate 19 is pushed out, the original mesh tube 18 is disassembled, then another mesh tube 18 containing unqualified urea is installed as described above, and the melting operation is continued, so that the feeding operation is more convenient, and it is also convenient to clean and maintain the parts on the rotating plate 11 at this station, and the overall use is more flexible and convenient.

[0022] In the embodiment, the process condensate input pipeline 2 is provided with an inlet control valve 23 and a metering pump 24 to facilitate the quantitative delivery of the process condensate.

[0023] In the embodiment, the solution output pipeline 3 is provided with a liquid outlet control valve 25 and a transfer pump 26, so that after the dissolving is completed, the urea solution in the recovery tank is discharged by opening the liquid outlet control valve 25 and is transported to the subsequent process under the pumping of the transfer pump 26.

[0024] In the embodiment, the mesh cylinder 18 includes a cylinder body 27 and a cylinder cover 28 arranged above the cylinder body 27, the top of the cylinder body 27 is open and is fixedly connected with an outer threaded connecting ring 29, the bottom of the cylinder cover 28 is fixedly connected with an inner threaded connecting ring 30, and the inner threaded connecting ring 30 is threadedly sleeved with the outer threaded connecting ring 29, so as to facilitate the opening and closing of the mesh cylinder 18, and realize the filling of the unqualified urea material and the cleaning and discharge of the insoluble substances remaining in the mesh cylinder 18 after the dissolving.

[0025] In the embodiment, the recovery tank 1 is communicated with a saturated steam input pipeline 31 at the lower part of one side, and a plurality of concentric ring pipes 32 are arranged in the lower part of the recovery tank 1, the ring pipes 32 are communicated through cross pipes 33, a plurality of spray holes 34 are arranged at the top of each ring pipe 32, and the outer side of the outermost ring pipe 32 is communicated with the saturated steam input pipeline 31, so that during the dissolving process, the saturated steam with a certain temperature can be input into the plurality of ring pipes 32 through the saturated steam input pipeline 31 and is uniformly sprayed upwards into the solution through the spray holes 34, which is more conducive to the uniform and complete mixing of the saturated steam and the solution in cooperation with the stirring of the disc turbine stirrer 22, so that the required temperature and concentration for the dissolving can be provided by the saturated steam, and the dissolving quality is ensured.

[0026] In the embodiment, the saturated steam input pipeline 31 is provided with a flow regulating valve 35, so as to facilitate the adjustment of the input flow of the saturated steam.

[0027] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for resolubilizing off-grade urea, characterized in that, The utility model provides a recovery tank, one side upper portion of the recovery tank is connected with process condensate input pipeline, bottom is connected with solution output pipeline, one side of the recovery tank is equipped with first protective box, first single shaft extension motor is fixedly arranged in the first protective box, the output shaft of first single shaft extension motor goes up and is fixedly connected with rotating disc in first protective box, the rotating disc is fixedly arranged with inverted L shaped support, the hydraulic cylinder is fixedly arranged on the horizontal part of the support, the piston rod of the hydraulic cylinder is fixedly connected with second protective box, second single shaft extension motor is fixedly arranged in the second protective box, the output shaft of second single shaft extension motor goes down and is fixedly connected with inverted U shaped rotating plate, the rotating plate goes into the recovery tank and its one vertical part is fixedly arranged with third protective box, the other vertical part is fixedly arranged with rotating shaft, double shaft extension motor is fixedly arranged in the third protective box, the two output shafts of double shaft extension motor all go out third protective box and its one output shaft tail end near the rotating shaft and the one end of rotating shaft near third protective box are all fixedly arranged with U shaped mounting seat, the openings of two mounting seats are oppositely arranged and the upper portions of two mounting seats are all provided with first internal thread through hole, the lower portions of two mounting seats are all provided with internal thread blind hole, the net cylinder is arranged between two mounting seats, the left and right outer sides of the net cylinder are both fixedly arranged with mounting plate, the second internal thread through hole is formed in the mounting plate, the mounting plate is inserted into the mounting seat on the same side and the first internal thread through hole, the second internal thread through hole and the internal thread blind hole on the same side are all correspondingly arranged and are screwed with the same butterfly bolt, the other output shaft tail end of double shaft extension motor and the other end of rotating shaft are all fixedly connected with disc turbine agitator.

2. The apparatus for resolubilization of off-grade urea according to claim 1, characterized in that, The process condensate input pipeline is provided with a liquid inlet control valve and a metering pump.

3. The apparatus for resolubilizing off-grade urea of claim 1, wherein, The solution output pipeline is provided with a liquid outlet control valve and a transfer pump.

4. The apparatus for resolubilizing off-grade urea of claim 1, wherein, The net cylinder comprises a cylinder body and a cylinder cover arranged above the cylinder body, the top of the cylinder body is open and fixedly connected with an external thread connecting ring, the bottom of the cylinder cover is fixedly connected with an internal thread connecting ring, and the internal thread connecting ring is threadedly sleeved with the external thread connecting ring.

5. The apparatus for resolubilizing off-grade urea of claim 1, wherein, The recovery tank is connected with a saturated steam input pipeline at the lower portion of one side, a plurality of concentric ring pipes are arranged in the lower portion of the recovery tank, the ring pipes are connected through cross pipes, a plurality of injection holes are formed in the top of each ring pipe, and the outer side of the outermost ring pipe is connected with the saturated steam input pipeline.

6. The apparatus for resolubilization of off-grade urea according to claim 5, characterized in that, The saturated steam input pipeline is provided with a flow regulating valve.

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