CN115475407B - Ammonium sulfate pre-thickening device and using method thereof - Google Patents

Abstract

The invention relates to the field of chemical industry, in particular to an ammonium sulfate pre-thickening device and a using method thereof, wherein the ammonium sulfate pre-thickening device comprises a pre-thickener and a crystallization reactor; the device comprises a mother liquor outlet, a mother liquor pipe, a mother liquor tank and a first communicating part, wherein the mother liquor outlet is arranged on one side of the pre-thickener; an opening and closing part for opening and closing the mother liquid outlet; the blow-washing pipe is inserted into the mother liquor pipe from the outside of the mother liquor pipe, and a plurality of air outlet holes are formed in the side surface of the blow-washing pipe; the device comprises a gas-leading pipe and a second communicating part, wherein one end of the gas-leading pipe is communicated with the crystallization reactor, and the second communicating part is arranged at the other end of the gas-leading pipe and is used for communicating the gas-leading pipe with the blow-washing pipe; and a regulating part for sealing the gas outlet when the pressure in the purge pipe is reduced to be equal to the pressure in the mother liquid pipe and opening the gas outlet when the pressure in the purge pipe is greater than the pressure in the mother liquid pipe. The invention can fully utilize the water vapor generated in the process of producing ammonium sulfate in the crystallization reactor, thereby reducing the waste of resources.

Description

Ammonium sulfate pre-thickening device and using method thereof

Technical Field

The invention relates to the field of chemical industry, in particular to an ammonium sulfate pre-thickening device and a using method thereof.

Background

The ammonium sulfate pre-thickener is an important component of an ammonium sulfate crystallization device and is pretreatment equipment for centrifugal separation of ammonium sulfate, in the pre-thickening process, redundant ammonium sulfate mother liquor overflows back to a mother liquor tank after being separated from amide oil, and because the ammonium sulfate mother liquor is supersaturated solution, crystals are separated out easily by cold and are scabbed and block a pipeline leading to the mother liquor tank, in order to solve the problem of blocking the pipeline, in the patent with the application number of CN 320601353.8 and the patent name of ammonium sulfate pre-thickener, the ammonium sulfate pre-thickener comprises an upper barrel body and a lower barrel body, and the diameter of the upper barrel body is larger than that of the lower barrel body. The thickener is provided with two magma feeding pipes, a purging steam pipe, an amide oil outlet, a mother liquor outlet, a thickened slurry outlet and an elutriation liquid inlet, and the amide oil outlet is provided with an overflow baffle. The amide oil outlet is connected with an amide oil separation device through an overflow pipeline, and the mother liquor outlet is connected with a mother liquor tank through a mother liquor pipeline. The export of steam purge pipe is located the mother liquor exit, and the overflow pipeline is equipped with sight glass and back flush pipeline, has improved the mother liquor temperature of overflow through steam purge pipe in this patent, improves the flow property of mother liquor to effectively alleviate the current situation that the pipeline that leads to the mother liquor jar is blockked up easily, but vapor needs liquid water to absorb sufficient heat vaporization production, consequently sweeps the vapor in the steam pipe and need consume extra energy, has wasted the resource.

Disclosure of Invention

In view of the above, the present invention is directed to an ammonium sulfate pre-thickening apparatus and a method for using the same, so as to solve the problem that in the pre-thickening process of a pre-thickener, a pipeline leading to a mother liquor tank is easily blocked, and additional energy is consumed to produce water vapor.

Based on the above purpose, the present invention provides an ammonium sulfate pre-thickening device, which comprises:

the bottom of the pre-thickener is provided with an elutriation liquid inlet, one side of the pre-thickener close to the bottom is provided with a thickened slurry outlet, and the top of the pre-thickener is provided with a magma feeding pipe;

the bottom of the crystallization reactor is communicated with the crystal slurry feeding pipe through a pipeline, and a hydraulic pump is arranged on the pipeline;

the ammonium sulfate pre-thickening device further comprises:

the device comprises a mother liquor outlet, a mother liquor pipe, a mother liquor tank and a first communicating part, wherein the mother liquor outlet is arranged on one side of the pre-thickener, the mother liquor tank is communicated with one end of the mother liquor pipe, and the first communicating part is used for communicating the mother liquor outlet with the other end of the mother liquor pipe;

an opening and closing part for opening and closing the mother liquid outlet;

the blow-washing pipe is inserted into the mother liquor pipe from the outside of the mother liquor pipe, a plurality of air outlet holes are formed in the side surface of the blow-washing pipe, which is positioned in the mother liquor pipe, and the air outlet holes are communicated with the inside of the blow-washing pipe;

the device comprises an air-entraining pipe and a second communicating part, wherein one end of the air-entraining pipe is communicated with the crystallization reactor, and the second communicating part is arranged at the other end of the air-entraining pipe and is used for communicating the air-entraining pipe with the blow-washing pipe;

and a regulating part for sealing the gas outlet hole when the pressure in the purge pipe is reduced to be equal to the pressure in the mother liquid pipe, and reopening the gas outlet hole when the pressure in the purge pipe is greater than the pressure in the mother liquid pipe.

Further, the ammonium sulfate pre-thickening device further comprises:

the device comprises a vertical plate, a bearing seat arranged on the front side surface of the vertical plate and a rotary table arranged on the bearing seat, wherein the rotary table is provided with a first through hole penetrating through the side surface of the rotary table, two outlets of the first through hole are respectively provided with a mother liquor pipe, one end of each mother liquor pipe is fixedly connected with the outlet corresponding to the first through hole, the mother liquor pipes are communicated with the first through holes, and one end surface of the rotary table is provided with a drainage hole communicated with the first through holes;

one end of the drainage tube is rotatably connected with the drainage hole, the outer diameter of the drainage tube is equal to the diameter of the drainage hole, and the other end of the drainage tube is communicated with the mother liquor tank;

a partition part for making one mother liquor pipe and the drainage pipe communicated after separating the other mother liquor pipe and the drainage pipe from each other;

and a rotating part for driving the turntable to rotate.

Further, the rotating portion includes:

the rotary plate comprises a motor and a rotating shaft, the motor is arranged on the front side face of the vertical plate, one end of the rotating shaft is fixedly connected with an output shaft of the motor, the rotary plate comprises a first end face and a second end face, the first through hole is formed in the first end face, the second end face is provided with a polygonal hole, and an insertion hole is formed in the end face, facing the polygonal hole, of the rotating shaft;

the device comprises a polygonal rod connected with the polygonal hole in a sliding manner and a surface ring groove arranged on the side surface of the polygonal rod;

one end of the movable rod is rotationally connected with the surface ring groove;

the first communicating portion includes:

the linkage plate is in sliding connection with a linkage groove arranged on the front side face of the vertical plate, friction force is generated between the linkage plate and the linkage groove, the linkage plate is provided with a first screw hole penetrating through the two side faces of the linkage plate, and the rotating shaft penetrates through the first screw hole;

the first end plate is provided with an end hole, and the front end of the mother liquor pipe is connected with the end hole in a sliding manner;

the side block is arranged on the outer side face of the mother liquor pipe, and the first electromagnet is arranged on the side block and faces the first end plate;

one end of each first push rod is fixed on the side surface of the linkage plate, and an inner hole is formed in the end surface, facing the pre-thickener, of each first push rod;

the extension rod is connected with the inner hole in a sliding mode, the second electromagnet is fixed at the bottom of the inner hole, one end of the second spring is fixed on the end face, located in the inner hole, of the extension rod, and the other end of the second spring is fixed at the bottom of the inner hole;

the limiting plate is fixed at one end of the extending rod on the end face outside the inner hole, and a limiting groove matched with the limiting plate is formed in the end face, facing the first push rod, of the first end plate;

the other end of the movable rod is fixedly connected with the side surface of one of the first push rods;

the ammonium sulfate pre-thickening device further comprises:

the driving plate is arranged on the side surface of the driving plate, back to the jack, and provided with a second thread matched with the first thread;

and the driving assembly is used for enabling the driving plate to be close to or far away from the central axis of the rotating shaft.

Further, the driving assembly includes:

one end face of the end block is provided with a lantern ring with a circular groove, at least two first cylinders arranged on the front side face of the vertical plate and an end block fixed to an output shaft of the first cylinders, and the end block is rotatably connected with the circular groove;

one end of the driving rod is fixed on the side face, back to the jack, of the driving plate, the inner side face of the sleeve ring is an inclined face, a driving groove is formed in the inclined face, and the other end of the driving rod is connected with the driving groove in a sliding mode.

Further, the opening and closing portion includes:

the sealing plate is arranged on the top end face of the sealing plate, and a screw is in threaded connection with the second screw;

the gear is arranged on the screw rod, and an end face annular groove is formed in one end face of the gear;

one end of each supporting rod is rotatably connected with the end face annular groove, a plurality of supporting rods are arranged, and the other end of each supporting rod is fixed on the front side face of the vertical plate;

the driving frame comprises a vertical rod and a transverse rod arranged on one side of the vertical rod, one end of the vertical rod is fixed on the side surface of one of the first push rods, and a straight rack matched with the gear is arranged on the side surface of the transverse rod.

Further, the second communicating portion includes:

the sleeve is sleeved at the end part of the air guide pipe close to the blow-washing pipe, and the second air cylinder is arranged on the front side face of the vertical plate, and an output shaft of the second air cylinder is fixed on the end face of the sleeve;

the inner plate is provided with a second through hole penetrating through two end faces of the inner plate, the diameter of the inner rod is equal to that of the second through hole, and part of the inner rod extends to the outside of the air guide pipe;

and the second end plate is arranged at the end part of the blow-wash pipe close to the air guide pipe, and the diameter of the second end plate is greater than the inner diameter of the sleeve.

Further, the adjusting portion includes:

the adjusting pipe is connected with the inside of the blow-washing pipe in a sliding mode, the outer diameter of the adjusting pipe is equal to the inner diameter of the blow-washing pipe, one end, facing the mother liquor outlet, of the adjusting pipe is in a sealed state, and one end, facing away from the mother liquor outlet, of the adjusting pipe is in an open state;

the through holes are arranged on the side surface of the adjusting pipe, are communicated with the inside of the adjusting pipe and correspond to the air outlet holes one by one;

the first through groove is formed in the side surface of the blow-washing pipe, the connecting rod is provided with a connecting end, and one end of the connecting rod is opposite to one first electromagnet on the mother liquor pipe;

one end of the first spring is fixed on the connecting end, and the other end of the first spring is fixed on one end of the first through groove.

Furthermore, the adjusting part also comprises a first pressure sensor arranged in the mother liquid pipe and a second pressure sensor arranged in the adjusting pipe.

Further, the isolation portion includes:

the two side holes are symmetrically arranged at two sides of the drainage hole, the side holes correspond to the mother liquor pipes one by one, and the side holes are close to the corresponding mother liquor pipes;

the sealing block is connected with the side hole in a sliding mode, one end of the third spring is fixedly connected with the side face, back to the first through hole, of the sealing block, and the other end of the third spring is fixed to the bottom of the side hole;

the device comprises a limiting ring groove arranged on the side surface of the polygonal rod, a second push rod with one end rotatably connected with the limiting ring groove, a stabilizing rod with one end fixedly connected with the side surface of the second push rod and a fixing block arranged on the front side surface of a vertical plate, wherein the fixing block is positioned below the polygonal rod and provided with a stabilizing hole, a gap is formed between the fixing block and a rotary plate, and the stabilizing rod is slidably connected with the stabilizing hole;

one end of the bottom rod is fixed on the side surface of the sealing block, which is opposite to the first through hole, and the second through groove is arranged on the side wall of the side hole;

the second push rod is used for entering the second through groove below the polygonal rod when the polygonal rod gradually moves towards the inside of the polygonal hole, and the sealing block gradually enters the first through hole by pushing the bottom rod.

The invention also provides a using method of the ammonium sulfate pre-thickening device, and the ammonium sulfate pre-thickening device comprises the following steps: before crystal slurry containing ammonium sulfate crystal grains is produced in a crystallization reactor, a mother liquid outlet is communicated with a mother liquid pipe through a first communicating part, and a blowing and washing pipe in the mother liquid pipe is communicated with an air entraining pipe through a second communicating part; then, producing magma containing ammonium sulfate grains in a crystallization reactor, enabling the magma containing ammonium sulfate grains to enter a pre-thickener through a magma feeding pipe through a hydraulic pump, enabling an elutriation liquid to enter the pre-thickener through an elutriation liquid inlet, opening and closing a mother liquid outlet through an opening and closing part, separating amide oil and mother liquid at the upper part of the pre-thickener, sorting ammonium sulfate crystals at the lower part of the pre-thickener and thickening the slurry, discharging the thickened slurry from a thickened slurry outlet, enabling the separated mother liquid to enter a mother liquid pipe through the mother liquid outlet, and finally recovering the mother liquid into a mother liquid tank; in the process of producing crystal slurry containing ammonium sulfate crystal grains by a crystallization reactor, generated steam enters a purging pipe, when the pressure in the purging pipe is greater than the pressure in a mother liquid pipe, the adjusting part opens the air outlet hole, so that the steam in the purging pipe is sprayed out of the mother liquid pipe through the air outlet hole, and when the pressure in the purging pipe is reduced to be equal to the pressure in the mother liquid pipe, the adjusting part seals the air outlet hole.

The invention has the beneficial effects that: by adopting the ammonium sulfate pre-thickening device and the using method thereof, a violent heat release process is generated in the process of producing ammonium sulfate in the crystallization reactor, and a large amount of water vapor is generated, so that in the process of pre-thickening in the pre-thickening device, the water vapor generated in the crystallization reactor is guided into the mother liquid pipe through the air guide pipe and the purge pipe, in order to ensure the purge effect on the interior of the mother liquid pipe, the air outlet is sealed by the adjusting part, when the pressure in the purge pipe is three to five times greater than the pressure in the mother liquid pipe, the air outlet is opened by the adjusting part, so that the water vapor in the purge pipe is sprayed into the mother liquid pipe through the air outlet, the temperature of the overflowed mother liquid is increased, the aim of improving the flowability of the mother liquid is fulfilled, the problem that the mother liquid pipe is easily blocked in the pre-thickening process is effectively relieved, when the pressure in the purge pipe is reduced to be equal to the pressure in the mother liquid pipe, the air outlet is sealed by the adjusting part, so that the pressure in the purge pipe is increased again, and the consumption of the water vapor generated in the crystallization reactor can be fully utilized, and the additional energy consumption is reduced.

Drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a front cross-sectional view of the present invention;

FIG. 2 is a schematic view of the communication between a mother liquor tube and a mother liquor outlet in the present invention;

FIG. 3 is an enlarged view taken at D in FIG. 2;

FIG. 4 is a schematic view of the connection of the conditioning tube to the purge tube of the present invention;

FIG. 5 is a front cross-sectional view of the first push rod of the present invention;

FIG. 6 is an enlarged view taken at A in FIG. 1;

FIG. 7 is an enlarged view at the side aperture of FIG. 6;

FIG. 8 is an enlarged view at B of FIG. 1;

FIG. 9 is an enlarged view at C of FIG. 1;

FIG. 10 is an enlarged view of the present invention at the pivot;

fig. 11 is an enlarged view of the collar of the present invention.

Labeled as:

1. a pre-thickener; 2. a crystallization reactor; 3. a crystal mush feeding pipe; 4. a vertical plate; 5. an inlet for elutriation liquid; 6. a thickened slurry outlet; 7. a mother liquor tube; 8. a blow-wash pipe; 9. a bleed pipe; 10. a motor; 11. a rotating shaft; 12. a linkage plate; 13. a linkage groove; 14. a first push rod; 15. a drive frame; 16. a first cylinder; 18. a mother liquor outlet; 19. closing the plate; 20. plate holes; 21. a second screw hole; 22. a screw; 23. a first end plate; 24. an end hole; 25. an adjustment tube; 26. a first electromagnet; 27. a movable rod; 29. a connecting rod; 30. a first through groove; 31. a first spring; 32. a gear; 33. an air outlet; 34. a through hole; 35. a limiting plate; 36. a limiting groove; 37. a second electromagnet; 38. an inner bore; 39. stretching the rod; 40. a second spring; 41. a turntable; 42. a drainage hole; 43. a first perforation; 44. a bearing seat; 45. a drainage tube; 46. sealing blocks; 47. side holes; 48. a third spring; 49. a surface ring groove; 50. a second through groove; 51. a limiting ring groove; 52. a polygonal rod; 53. a polygonal hole; 54. a bottom bar; 55. a second push rod; 56. a bottom hole; 57. a fixed block; 58. a stabilization well; 59. a stabilizer bar; 60. a second end plate; 61. a sleeve; 62. an inner plate; 63. a second perforation; 64. an inner rod; 65. a second cylinder; 66. a support bar; 67. an end face ring groove; 68. a collar; 70. a jack; 71. a drive plate; 72. a plate groove; 73. a circular groove; 74. an end-block; 75. a drive rod; 76. the groove is driven.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to specific embodiments below.

It is to be noted that technical terms or scientific terms used herein should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs, unless otherwise defined. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In a first aspect of the present invention, an ammonium sulfate pre-thickening apparatus is provided, as shown in fig. 1, fig. 2, and fig. 4, including:

the bottom of the pre-thickener 1 is provided with an elutriation liquid inlet 5, one side of the pre-thickener 1 close to the bottom is provided with a thickened slurry outlet 6, and the top of the pre-thickener 1 is provided with a magma feeding pipe 3;

the bottom of the crystallization reactor 2 is communicated with the crystal slurry feeding pipe 3 through a pipeline, and a hydraulic pump is arranged on the pipeline;

the ammonium sulfate pre-thickening device further comprises:

a mother liquor outlet 18 arranged at one side of the pre-thickener 1, a mother liquor pipe 7, a mother liquor tank communicated with one end of the mother liquor pipe 7 and a first communicating part used for communicating the mother liquor outlet 18 with the other end of the mother liquor pipe 7;

an opening and closing part for opening and closing the mother liquor outlet 18;

the blow-washing pipe 8 is inserted into the mother liquor pipe 7 from the outside of the mother liquor pipe 7, a plurality of air outlet holes 33 are formed in the side surface of the blow-washing pipe 8, which is positioned in the mother liquor pipe 7, and the air outlet holes 33 are communicated with the inside of the blow-washing pipe 8;

the device comprises an air entraining pipe 9 with one end communicated with the crystallization reactor 2 and a second communicating part arranged at the other end of the air entraining pipe 9, wherein the second communicating part is used for communicating the air entraining pipe 9 with the blow-washing pipe 8;

and an adjusting portion for sealing the air outlet hole 33 when the pressure in the purge pipe 8 is reduced to be equal to the pressure in the mother liquor pipe 7, and for reopening the air outlet hole 33 when the pressure in the purge pipe 8 is greater than the pressure in the mother liquor pipe 7.

In the present embodiment, before producing the magma containing ammonium sulfate crystal grains in the crystallization reactor 2, the mother liquor outlet 18 is communicated with the mother liquor pipe 7 through the first communication portion, and the purge pipe 8 in the mother liquor pipe 7 is communicated with the bleed air pipe 9 through the second communication portion; then, producing magma containing ammonium sulfate grains in a crystallization reactor 2, enabling the magma containing ammonium sulfate grains to enter a pre-thickener 1 from a magma feeding pipe 3 through a hydraulic pump, enabling an elutriation liquid to enter the pre-thickener 1 from an elutriation liquid inlet 5, opening a mother liquid outlet 18 at an opening and closing part, separating amide oil and mother liquid at the upper part of the pre-thickener 1, sorting ammonium sulfate crystals at the lower part of the pre-thickener 1 and thickening the serous liquid, discharging the thickened serous liquid from a thickened serous liquid outlet 6, enabling the separated mother liquid to enter a mother liquid pipe 7 through the mother liquid outlet 18, and finally recovering the mother liquid into a mother liquid tank; in the process of producing crystal slurry containing ammonium sulfate crystal grains by the crystallization reactor 2, the generated steam enters the blow-washing pipe 8, when the pressure in the blow-washing pipe 8 is greater than the pressure in the mother liquor pipe 7, the adjusting part opens the air outlet 33, so that the steam in the blow-washing pipe 8 is sprayed into the mother liquor pipe 7 through the air outlet 33, and when the pressure in the blow-washing pipe 8 is reduced to be equal to the pressure in the mother liquor pipe 7, the adjusting part seals the air outlet 33. In summary, during the process of producing ammonium sulfate in the crystallization reactor 2, which is a violent exothermic process, a large amount of steam is generated, so that during the process of pre-thickening in the pre-thickener 1, the steam generated in the crystallization reactor 2 is introduced into the mother liquor pipe 7 through the air-introducing pipe 9 and the purge pipe 8, and in order to ensure the purging effect on the interior of the mother liquor pipe 7, the adjusting part seals the air outlet 33, preferably, when the pressure in the purge pipe 8 is three to five times greater than the pressure in the mother liquor pipe 7, the adjusting part opens the air outlet 33, so that the steam in the purge pipe 8 is ejected into the mother liquor pipe 7 through the air outlet 33, thereby increasing the temperature of the overflowing mother liquor, achieving the purpose of improving the fluidity of the mother liquor, effectively relieving the situation that the mother liquor pipe 7 is easily blocked during the pre-thickening process, when the pressure in the purge pipe 8 is reduced to be in phase with the pressure in the mother liquor pipe 7, the air outlet 33 seals the air outlet 33, so that the pressure in the purge pipe 8 is increased, thereby fully utilizing the energy in the crystallization reactor 2 again, and reducing the waste of the steam generation.

As an embodiment, as shown in fig. 1 and 6, the ammonium sulfate pre-thickening apparatus further includes:

the device comprises a vertical plate 4, a bearing seat 44 arranged on the front side surface of the vertical plate 4 and a rotary disc 41 arranged on the bearing seat 44, wherein the rotary disc 41 is provided with a first through hole 43 penetrating through the side surface of the rotary disc, two outlets of the first through hole 43 are respectively provided with a mother liquor pipe 7, one end of each mother liquor pipe 7 is fixedly connected with the corresponding outlet of the first through hole 43, the mother liquor pipe 7 is communicated with the first through hole 43, and one end surface of the rotary disc 41 is provided with a drainage hole 42 communicated with the first through hole 43;

a drainage tube 45 with one end rotatably connected with the drainage hole 42, wherein the outer diameter of the drainage tube 45 is equal to the diameter of the drainage hole 42, and the other end of the drainage tube 45 is communicated with the mother liquor tank;

a partition for making one mother liquor pipe 7 communicate with the drainage tube 45 after separating the other mother liquor pipe 7 from the drainage tube 45;

a rotating part for driving the turntable 41 to rotate.

In this embodiment, when the rotating part drives the rotating disc 41 to rotate so that one of the mother liquor pipes 7 is opposite to the mother liquor outlet 18, the mother liquor outlet 18 is communicated with the mother liquor pipe 7 through the first communicating part, the bleed air pipe 9 is communicated with the purge pipe 8 in the mother liquor pipe 7 through the second communicating part, the mother liquor pipe 7 which is not communicated with the mother liquor outlet 18 is separated from the drainage hole 42 through the separating part, and the mother liquor pipe 7 which is communicated with the mother liquor outlet 18 is communicated with the drainage hole 42, after the completion, the opening and closing part opens the mother liquor outlet 18, during the pre-thickening process of the pre-thickener 1, the mother liquor pipe 7 is purged by the purge pipe 8, although the blockage of the mother liquor pipe 7 can be effectively relieved, after the long-time operation, because the purging of the steam is interrupted, the mother liquor pipe 7 still may be blocked if not cleaned in time, therefore, after a period of time, the opening and closing part firstly closes the mother liquor outlet 18, the first communicating part separates the mother liquor outlet 18 from the mother liquor pipe 7 used for a period of time, the second communicating part separates the bleed air pipe 9 from the blow-washing pipe 8 in the mother liquor pipe 7, then after the mother liquor in the mother liquor pipe 7 in use is discharged, the rotating part drives the rotating disc 41 to rotate, so that the other mother liquor pipe 7 rotates to the position right opposite to the mother liquor outlet 18, after the mother liquor is discharged, the mother liquor outlet 18 is communicated with the mother liquor pipe 7 through the first communicating part again, the bleed air pipe 9 is communicated with the blow-washing pipe 8 in the mother liquor pipe 7 through the second communicating part again, then the mother liquor pipe 7 which is not communicated with the mother liquor outlet 18 at the moment is separated from the drainage hole 42 through the separating part, and the mother liquor pipe 7 which is communicated with the mother liquor outlet 18 is communicated with the drainage hole 42, the opening and closing part opens the mother liquor outlet 18, so that the mother liquor can be guided into the mother liquor tank again, and an operator can clean the unused mother liquor pipe 7 for the next use.

As one embodiment, as shown in fig. 1, 2, 4, 5, 6, and 10, the rotating portion includes:

the rotary table 41 comprises a first end face and a second end face, the first through hole 43 is arranged at the first end face, the second end face is provided with a polygonal hole 53, and an end face, facing the polygonal hole 53, of the rotary shaft 11 is provided with a jack 70;

a polygonal rod 52 slidably connected to the polygonal hole 53 and a surface ring groove 49 formed in a side surface of the polygonal rod 52;

a movable rod 27 having one end rotatably connected to the surface ring groove 49;

the first communicating portion includes:

the linkage plate 12 is slidably connected with a linkage groove 13 arranged on the front side surface of the vertical plate 4, friction force is generated between the linkage plate 12 and the linkage groove 13, the linkage plate 12 is provided with a first screw hole penetrating through two side surfaces of the linkage plate, and the rotating shaft 11 penetrates through the first screw hole;

a first end plate 23 provided with an end hole 24, wherein the front end of the mother liquor pipe 7 is connected with the end hole 24 in a sliding way;

the side block is arranged on the outer side surface of the mother liquor pipe 7, the first electromagnet 26 is arranged on the side block, and the first electromagnet 26 faces the first end plate 23;

at least two first push rods 14, wherein one end of each first push rod 14 is fixed on the side surface of the linkage plate 12, and an inner hole 38 is formed in the end surface, facing the pre-thickener 1, of each first push rod 14;

a stretch rod 39 connected with the inner hole 38 in a sliding manner, a second electromagnet 37 fixed at the bottom of the inner hole 38, and a second spring 40 with one end fixed to the end surface of the stretch rod 39 located in the inner hole 38, wherein the other end of the second spring 40 is fixed at the bottom of the inner hole 38;

the limiting plate 35 is fixed at one end of the extending rod 39 on the end surface outside the inner hole 38, and the end surface of the first end plate 23 facing the first push rod 14 is provided with a limiting groove 36 matched with the limiting plate 35;

the other end of the movable rod 27 is fixedly connected with the side surface of one of the first push rods 14;

the ammonium sulfate pre-thickening device further comprises:

a plurality of plate grooves 72 which are arranged on the inner side wall of the jack 70 and penetrate through the side surface of the rotating shaft 11, and a driving plate 71 which is in sliding connection with the plate grooves 72, wherein first threads are arranged on the inner wall of the first screw hole, and second threads matched with the first threads are arranged on the side surface of the driving plate 71, which is opposite to the jack 70;

a drive assembly for moving the drive plate 71 closer to or away from the central axis of the shaft 11.

In the embodiment, during thickening of the pre-thickener 1, one mother liquor pipe 7 is communicated with the mother liquor outlet 18, at this time, the driving assembly enables the driving plate 71 to be far away from the central axis of the rotating shaft 11, the first thread is enabled to be kept in a meshed state with the second thread, the second spring 40 is in a compressed state, the limiting plate 35 is enabled to be overlapped with the limiting groove 36 through the extension rod 39, the first end plate 23 is enabled to be attached to the outer side face of the pre-thickener 1, and sealing performance between the mother liquor outlet 18 and the mother liquor pipe 7 is guaranteed; after the mother liquor pipe 7 guides the mother liquor for a period of time, in order to ensure that the mother liquor pipe 7 is not blocked, at the moment, the other mother liquor pipe 7 needs to be switched to be communicated with the mother liquor outlet 18, at the moment, the motor 10 is started and rotates forwards to drive the rotating shaft 11 to rotate, so that the linkage plate 12 moves towards the direction of the motor 10, the compression degree of the second spring 40 is gradually reduced, the pressure between the first end plate 23 and the pre-thickener 1 is also gradually reduced, in the process, the opening and closing part closes the mother liquor outlet 18, when the second spring 40 is still in a compression state, the motor 10 stops driving, the second electromagnet 37 is electrified to generate suction force to the extension rod 39, so that the extension rod 39 retracts a distance into the inner hole 38 to drive the limiting plate 35 to be away from the limiting groove 36, at the moment, the first electromagnet 26 is electrified to generate suction force to the first end plate 23, and the first end plate 23 is ensured not to be separated from the mother liquor pipe 7 in the rotating process of the rotating disc 41; here, enough friction force exists between the linkage plate 12 and the linkage groove 13, and when the motor 10 drives the linkage plate 12, the linkage plate 12 can overcome the friction force between the linkage plate and the linkage groove 13 to move; in addition, in the process that the linkage plate 12 moves towards the direction of the motor 10, a part of the polygonal rod 52 enters the jack 70 through the movable rod 27, then the driving plate 71 moves towards the central axis direction of the rotating shaft 11 through the driving assembly, and finally the polygonal rod 52 is clamped tightly, after the completion, the motor 10 rotates forwards, the rotary disc 41 is driven to rotate through the polygonal rod 52, so that the mother liquor pipe 7 above the rotary disc rotates a certain distance towards the front side of the front side face of the vertical plate 4, after the limiting plate 35 is staggered with the first end plate 23, the second electromagnet 37 is powered off, under the action of the elastic force of the second spring 40, the limiting plate 35 moves to the front of the first end plate 23, the linkage plate 12 keeps stable due to the friction force between the linkage plate 12 and the linkage groove 13, so that the limiting plate 35 and the first electromagnet 26 are located at different sides of the first end plate 23, at this time, the motor 10 rotates backwards, so that the mother liquor pipe 7 above can normally rotate towards the lower part of the rotating disc 41, and interference between the mother liquor pipe 7 and the limiting plate 35 is avoided when the rotating disc 41 rotates, before the mother liquor pipe 7 originally positioned below moves to the position right above the rotating disc 41, the second electromagnet 37 is electrified again, so that the limiting plate 35 returns to the original position, the linkage plate 12 is kept stable still through the friction force between the linkage plate 12 and the linkage groove 13, when the mother liquor pipe 7 originally positioned below is right opposite to the mother liquor outlet 18, the driving component enables the driving plate 71 to be away from the central axis of the rotating shaft 11 again, so that the first thread is meshed with the second thread again, at the moment, the motor 10 is started, so that the linkage plate 12 moves towards the pre-thickener 1, in the process, the second electromagnet 37 is electrified, so that the limiting plate 35 quickly enters the limiting groove 36, the stability of the mother liquor pipe 7 is ensured, and the rotating disc 41 is prevented from rotating under the external force, through the second spring 40, will make this moment produce pressure between first end plate 23 and the pre-thickener 1, guarantee the leakproofness between mother liquor export 18 and mother liquor pipe 7, at this moment linkage board 12 continues the motion for the second spring 40 continues the compression, thereby makes the leakproofness between mother liquor export 18 and the mother liquor pipe 7 better, opens and close the portion and also opens mother liquor export 18 at this in-process.

As an embodiment, as shown in fig. 10 and 11, the driving assembly includes:

one end face of the end plate is provided with a lantern ring 68 with an annular groove 73, at least two first air cylinders 16 arranged on the front side face of the vertical plate 4 and an end block 74 fixed on an output shaft of the first air cylinders 16, wherein the end block 74 is rotatably connected with the annular groove 73;

and one end of the driving rod 75 is fixed on the side surface of the driving plate 71 opposite to the jack 70, the inner side surface of the lantern ring 68 is an inclined surface, the inclined surface is provided with a driving groove 76, and the other end of the driving rod 75 is in sliding connection with the driving groove 76.

In this embodiment, when the first cylinder 16 drives the collar 68 to move toward the linkage plate 12, the driving plate 71 is moved toward the central axis of the rotating shaft 11 by the inclined surface, and when the first cylinder 16 drives the collar 68 to move toward the motor 10, the driving plate 71 is moved away from the central axis of the rotating shaft 11 by the inclined surface.

As one embodiment, as shown in fig. 1, 2, and 9, the opening and closing part includes:

the sealing plate 19, a second screw hole 21 arranged on the top end face of the sealing plate 19 and a screw rod 22 in threaded connection with the second screw hole 21, a plate hole 20 is arranged on the upper end face of the pre-thickener 1, the sealing plate 19 is connected with the plate hole 20 in a sliding manner, and the sealing plate 19 is in contact connection with the inner wall of the pre-thickener 1 where the mother liquor outlet 18 is located;

a gear 32 mounted on the screw 22, wherein one end face of the gear 32 is provided with an end face annular groove 67;

one end of each support rod 66 is rotatably connected with the end face ring groove 67, a plurality of support rods 66 are arranged, and the other end of each support rod 66 is fixed on the front side face of the vertical plate 4;

the driving frame 15 comprises a vertical rod and a cross rod arranged on one side of the vertical rod, one end of the vertical rod is fixed on the side surface of one of the first push rods 14, and a spur rack matched with the gear 32 is arranged on the side surface of the cross rod.

In this embodiment, when one of the mother liquid pipes 7 is communicated with the mother liquid outlet 18, the gear 32 and the spur rack are kept in a meshed state, at this time, the closing plate 19 opens the mother liquid outlet 18, when the linkage plate 12 moves towards the motor 10, the first push rod 14 also moves towards the motor 10, at this time, the limit plate 35 still coincides with the limit groove 36, at this time, although the compression amount of the second spring 40 is reduced, when the mother liquid pipe 7 and the mother liquid outlet 18 still have sealing performance, during this process, the spur rack drives the gear 32 to rotate, so that the closing plate 19 closes the mother liquid outlet 18, and finally, the spur rack is separated from the gear 32.

As an embodiment, as shown in fig. 1 and 8, the second communicating portion includes:

the sleeve 61 is sleeved at the end part of the air guide pipe 9 close to the blow-washing pipe 8, and the second cylinder 65 is arranged on the front side surface of the vertical plate 4, and an output shaft of the second cylinder 65 is fixed on the end surface of the sleeve 61;

the inner plate 62 is provided with a second through hole 63 penetrating through two end faces of the inner plate 62, the diameter of the inner plate 64 is equal to that of the second through hole 63, and a part of the inner plate 64 extends to the outside of the air guide pipe 9;

and the second end plate 60 is arranged at the end part of the blow-washing pipe 8 close to the air guide pipe 9, and the diameter of the second end plate 60 is larger than the inner diameter of the sleeve 61.

In this embodiment, during the rotation of the turntable 41, the second cylinder 65 causes the inner rod 64 to be inserted into the second through hole 63 to seal the bleed air pipe 9, and after one of the blow-wash pipes 8 is aligned with the bleed air pipe 9, the second cylinder 65 pushes the sleeve 61 to move towards the second end plate 60, so that a relatively large pressure is provided between the sleeve 61 and the second end plate 60 to ensure the sealing performance, and at this time, the inner rod 64 is separated from the second through hole 63.

As one embodiment, as shown in fig. 2, 3, 4, 10, and 11, the adjusting portion includes:

the adjusting pipe 25 is connected with the inside of the blow-washing pipe 8 in a sliding manner, the outer diameter of the adjusting pipe 25 is equal to the inner diameter of the blow-washing pipe 8, one end, facing the mother liquor outlet 18, of the adjusting pipe 25 is in a sealed state, and one end, facing away from the mother liquor outlet 18, of the adjusting pipe 25 is in an open state;

the through holes 34 are arranged on the side surface of the adjusting pipe 25, the through holes 34 are communicated with the inside of the adjusting pipe 25, and the through holes 34 correspond to the air outlet holes 33 one by one;

a first through groove 30 arranged on the side surface of the blow-washing pipe 8 and a connecting rod 29 provided with a connecting end, wherein one end of the connecting rod 29 is opposite to one of the first electromagnets 26 on the mother liquor pipe 7;

one end of the first spring 31 is fixed to the connecting end, and the other end of the first spring 31 is fixed to one end of the first through groove 30.

In this embodiment, when the first electromagnet 26 loses power, the air outlet 33 is communicated with the through hole 34, at this time, water vapor will be sprayed out from the air outlet 33, when the pressure in the adjusting pipe 25 drops to be equal to the pressure in the mother liquor pipe 7, the first electromagnet 26 is powered on, so that the adjusting pipe 25 overcomes the first spring 31 to move, the through hole 34 is staggered with the air outlet 33, and when the pressure in the adjusting pipe 25 is 3 to 5 times greater than the pressure in the mother liquor pipe 7, the first electromagnet 26 loses power.

Preferably, the adjustment unit further includes a first pressure sensor provided in the mother liquor pipe 7 for sensing the pressure in the mother liquor pipe 7 and a second pressure sensor provided in the adjustment pipe 25 for sensing the pressure in the adjustment pipe 25.

As one embodiment, as shown in fig. 1, 6, and 7, the spacer includes:

two side holes 47 are formed in the side wall of the first perforation 43, the two side holes 47 are symmetrically formed in two sides of the drainage hole 42, the side holes 47 correspond to the mother liquor pipes 7 one by one, and the side holes 47 are close to the corresponding mother liquor pipes 7;

a sealing block 46 connected with the side hole 47 in a sliding manner, and a third spring 48 with one end fixedly connected with the side surface of the sealing block 46 opposite to the first perforation 43, wherein the other end of the third spring 48 is fixed at the bottom of the side hole 47;

the fixing block 57 is positioned below the polygonal rod 52, the fixing block 57 is provided with a stabilizing hole 58, a gap is reserved between the fixing block 57 and the rotating disc 41, and the stabilizing rod 59 is connected with the stabilizing hole 58 in a sliding manner;

a bottom rod 54 with one end fixed on the side of the sealing block 46 opposite to the first through hole 43 and a second through groove 50 arranged on the side wall of the side hole 47, wherein the second through groove 50 penetrates through the side wall of the polygonal hole 53, the bottom of the side hole 47 is provided with a bottom hole 56 opposite to the bottom rod 54, the bottom hole 56 penetrates through the end surface of the rotary disc 41 facing to the fixed block 57, and the bottom hole 56 is communicated with the second through groove 50;

the second push rod 55 is used for entering the second through groove 50 located below the polygonal rod 52 when the polygonal rod 52 gradually moves towards the inside of the polygonal hole 53, and gradually enters the sealing block 46 into the first through hole 43 by pushing the bottom rod 54.

In this embodiment, when one of the mother liquor pipes 7 is communicated with the mother liquor outlet 18, at this time, due to the action of the movable rod 27, the polygonal rod 52 will drive the second push rod 55 to enter the second through groove 50 located below, so that the sealing block 46 located below enters the first through hole 43 against the third spring 48, and finally the mother liquor pipe 7 located below is completely separated from the drainage hole 42, the upper sealing block 46 is completely contracted into the side hole 47 under the action of the third spring 48, so that the mother liquor pipe 7 located above is communicated with the drainage hole 42, when the linkage plate 12 moves towards the motor 10, under the action of the movable rod 27, the polygonal rod 52 is moved towards the insertion hole 70, at this time, the second push rod 55 will gradually disengage from the second through groove 50, and finally enter the gap, the lower sealing block 46 will also be contracted into the side hole 47 under the action of the third spring 48, when the rotary disk 41 rotates 180 degrees, the mother liquor pipe 7 located above will rotate to below the rotary disk 41, at this time, the second sealing block 46 will move towards the second through groove 50, so that the linkage plate 42 moves towards the drainage hole 42, so that the second through groove 42 is completely separated from the drainage hole 42, and the linkage plate 42 moves towards the drainage hole 12, so that the mother liquor pipe 7 is completely separated from the drainage hole 1.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

The present invention is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (5)

1. An ammonium sulfate pre-thickening apparatus comprising:

the bottom of the pre-thickener (1) is provided with an elutriation liquid inlet (5), one side of the pre-thickener (1) close to the bottom is provided with a thickened slurry outlet (6), and the top of the pre-thickener (1) is provided with a magma feeding pipe (3);

the bottom of the crystallization reactor (2) is communicated with the crystal slurry feeding pipe (3) through a pipeline, and a hydraulic pump is arranged on the pipeline;

it is characterized in that the ammonium sulfate pre-thickening device further comprises:

a mother liquor outlet (18) arranged on one side of the pre-thickener (1), a mother liquor pipe (7), a mother liquor tank communicated with one end of the mother liquor pipe (7), and a first communicating part used for communicating the mother liquor outlet (18) with the other end of the mother liquor pipe (7);

an opening and closing part for opening and closing the mother liquor outlet (18);

the blow-wash pipe (8) is inserted into the mother liquor pipe (7) from the outside of the mother liquor pipe (7), a plurality of air outlet holes (33) are formed in the side surface, located inside the mother liquor pipe (7), of the blow-wash pipe (8), and the air outlet holes (33) are communicated with the inside of the blow-wash pipe (8);

the device comprises an air-entraining pipe (9) with one end communicated with the crystallization reactor (2) and a second communicating part arranged at the other end of the air-entraining pipe (9), wherein the second communicating part is used for communicating the air-entraining pipe (9) with a blow-washing pipe (8);

a regulating part for sealing the air outlet hole (33) when the pressure in the blow-washing pipe (8) is reduced to be equal to the pressure in the mother liquor pipe (7), and reopening the air outlet hole (33) when the pressure in the blow-washing pipe (8) is greater than the pressure in the mother liquor pipe (7);

the ammonium sulfate pre-thickening device further comprises:

the device comprises a vertical plate (4), a bearing seat (44) arranged on the front side face of the vertical plate (4) and a rotary table (41) installed on the bearing seat (44), wherein the rotary table (41) is provided with a first through hole (43) penetrating through the side surface of the rotary table, two outlets of the first through hole (43) are respectively provided with a mother liquor pipe (7), one end of each mother liquor pipe (7) is fixedly connected with the outlet corresponding to the first through hole (43), the mother liquor pipes (7) are communicated with the first through holes (43), and one end face of the rotary table (41) is provided with a drainage hole (42) communicated with the first through hole (43);

one end of the drainage tube (45) is rotatably connected with the drainage hole (42), the outer diameter of the drainage tube (45) is equal to the diameter of the drainage hole (42), and the other end of the drainage tube (45) is communicated with the mother liquor tank;

a partition part for communicating the other mother liquor pipe (7) with the drainage pipe (45) after separating the mother liquor pipe (7) and the drainage pipe (45) from each other;

a rotating part for driving the turntable (41) to rotate;

the rotating portion includes:

the rotary table comprises a motor (10) arranged on the front side face of a vertical plate (4) and a rotating shaft (11) with one end fixedly connected with an output shaft of the motor (10), the rotary table (41) comprises a first end face and a second end face, the first through hole (43) is arranged on the first end face, the second end face is provided with a polygonal hole (53), and an end face, facing the polygonal hole (53), of the rotating shaft (11) is provided with a jack (70);

a polygonal rod (52) connected with the polygonal hole (53) in a sliding way and a surface ring groove (49) arranged on the side surface of the polygonal rod (52);

a movable rod (27) with one end rotatably connected with the surface ring groove (49);

the first communicating portion includes:

the linkage plate (12) is connected with a linkage groove (13) arranged on the front side face of the vertical plate (4) in a sliding mode, friction force is arranged between the linkage plate (12) and the linkage groove (13), the linkage plate (12) is provided with first screw holes penetrating through the two side faces of the linkage plate, and the rotating shaft (11) penetrates through the first screw holes;

the first end plate (23) is provided with an end hole (24), and the front end of the mother liquor pipe (7) is connected with the end hole (24) in a sliding manner;

the side block is arranged on the outer side surface of the mother liquor pipe (7), the first electromagnet (26) is arranged on the side block, and the first electromagnet (26) faces the first end plate (23);

one end of each first push rod (14) is fixed on the side surface of the linkage plate (12), and an inner hole (38) is formed in the end face, facing the pre-thickener (1), of each first push rod (14);

the extension rod (39) is connected with the inner hole (38) in a sliding mode, the second electromagnet (37) is fixed to the bottom of the inner hole (38), one end of the second spring (40) is fixed to the end face, located in the inner hole (38), of the extension rod (39), and the other end of the second spring (40) is fixed to the bottom of the inner hole (38);

a limiting plate (35) with one end fixed on the end surface of the extension rod (39) positioned outside the inner hole (38), wherein a limiting groove (36) matched with the limiting plate (35) is arranged on the end surface of the first end plate (23) facing the first push rod (14);

the other end of the movable rod (27) is fixedly connected with the side surface of one of the first push rods (14);

the ammonium sulfate pre-thickening device further comprises:

the driving plate (71) is arranged on a plurality of plate grooves (72) which penetrate through the side surface of the rotating shaft (11) and are arranged on the inner side wall of the insertion hole (70), the driving plate (71) is connected with the plate grooves (72) in a sliding mode, first threads are arranged on the inner wall of the first screw hole, and second threads matched with the first threads are arranged on the side surface, back to the insertion hole (70), of the driving plate (71);

a drive assembly for moving the drive plate (71) towards and away from the central axis of the shaft (11);

the drive assembly includes:

wherein, one end surface is provided with a lantern ring (68) of a circular groove (73), at least two first cylinders (16) arranged on the front side surface of the vertical plate (4) and an end block (74) fixed on the output shaft of the first cylinder (16), the end block (74) is rotatably connected with the annular groove (73);

one end of the driving rod (75) is fixed on the side surface of the driving plate (71) opposite to the insertion hole (70), the inner side surface of the lantern ring (68) is an inclined surface, a driving groove (76) is formed in the inclined surface, and the other end of the driving rod (75) is in sliding connection with the driving groove (76);

the opening and closing part includes:

the pre-thickening device comprises a sealing plate (19), a second screw hole (21) arranged on the top end face of the sealing plate (19) and a screw rod (22) in threaded connection with the second screw hole (21), wherein a plate hole (20) is formed in the upper end face of the pre-thickening device (1), the sealing plate (19) is in sliding connection with the plate hole (20), and the sealing plate (19) is in contact connection with the inner wall of the pre-thickening device (1) where a mother liquor outlet (18) is located;

a gear (32) mounted on the screw rod (22), wherein one end face of the gear (32) is provided with an end face annular groove (67);

one end of each supporting rod (66) is rotatably connected with the end face ring groove (67), a plurality of supporting rods (66) are arranged, and the other ends of the supporting rods (66) are fixed on the front side face of the vertical plate (4);

the driving frame (15) comprises a vertical rod and a cross rod arranged on one side of the vertical rod, one end of the vertical rod is fixed on the side surface of one first push rod (14), and a spur rack matched with the gear (32) is arranged on the side surface of the cross rod;

the isolation portion includes:

two side holes (47) arranged on the side wall of the first perforation (43), wherein the two side holes (47) are symmetrically arranged on two sides of the drainage hole (42), the side holes (47) correspond to the mother liquor tubes (7) one by one, and the side holes (47) are close to the corresponding mother liquor tubes (7);

the sealing block (46) is connected with the side hole (47) in a sliding mode, one end of the third spring (48) is fixedly connected with the side face, back to the first through hole (43), of the sealing block (46), and the other end of the third spring (48) is fixed to the bottom of the side hole (47);

the fixing block (57) is positioned below the polygonal rod (52), the fixing block (57) is provided with a stabilizing hole (58), a gap is reserved between the fixing block (57) and the rotating disc (41), and the stabilizing rod (59) is in sliding connection with the stabilizing hole (58);

one end of the bottom rod (54) is fixed on the side surface of the sealing block (46) back to the first through hole (43), and the second through groove (50) is arranged on the side wall of the side hole (47), the second through groove (50) penetrates through the side wall of the polygonal hole (53), the bottom of the side hole (47) is provided with a bottom hole (56) opposite to the bottom rod (54), the bottom hole (56) penetrates through the end surface of the rotary disc (41) facing the fixed block (57), and the bottom hole (56) is communicated with the second through groove (50);

the second push rod (55) is used for entering the second through groove (50) positioned below the polygonal rod (52) when the polygonal rod (52) gradually moves towards the inside of the polygonal hole (53), and the sealing block (46) is gradually entered into the first through hole (43) by pushing the bottom rod (54).

2. The ammonium sulfate pre-thickening device according to claim 1, wherein the second communication part comprises:

the sleeve (61) is sleeved at the end part, close to the blow-washing pipe (8), of the air guide pipe (9), and the second cylinder (65) is arranged on the front side face of the vertical plate (4), and an output shaft of the second cylinder (65) is fixed to the end face of the sleeve (61);

the inner plate (62) is arranged on the inner side surface of the sleeve (61), the inner rod (64) is arranged in the air guide pipe (9), the inner plate (62) is provided with second through holes (63) penetrating through two end surfaces of the inner plate, the diameter of the inner rod (64) is equal to that of the second through holes (63), and part of the inner rod (64) extends to the outside of the air guide pipe (9);

and the second end plate (60) is arranged at the end part of the blow-washing pipe (8) close to the air-entraining pipe (9), and the diameter of the second end plate (60) is larger than the inner diameter of the sleeve (61).

3. The ammonium sulfate pre-thickening device of claim 2, wherein the adjusting portion comprises:

the adjusting pipe (25) is connected with the inside of the blow washing pipe (8) in a sliding mode, the outer diameter of the adjusting pipe (25) is equal to the inner diameter of the blow washing pipe (8), one end, facing the mother liquid outlet (18), of the adjusting pipe (25) is in a sealed state, and one end, facing away from the mother liquid outlet (18), of the adjusting pipe (25) is in an open state;

the through holes (34) are formed in the side surface of the adjusting pipe (25), the through holes (34) are communicated with the inside of the adjusting pipe (25), and the through holes (34) correspond to the air outlet holes (33) one to one;

a first through groove (30) arranged on the side surface of the blow-wash pipe (8) and a connecting rod (29) provided with a connecting end, wherein one end of the connecting rod (29) is right opposite to one first electromagnet (26) on the mother liquor pipe (7);

one end of the first spring (31) is fixed on the connecting end, and the other end of the first spring (31) is fixed on one end of the first through groove (30).

4. An ammonium sulfate pre-thickening device according to claim 3, wherein the adjusting part further comprises a first pressure sensor disposed in the mother liquor pipe (7) and a second pressure sensor disposed in the adjusting pipe (25).

5. The use method of the ammonium sulfate pre-thickening device as claimed in any one of claims 1 to 4 is characterized by comprising the following steps: before crystal mush containing ammonium sulfate crystal grains is produced in a crystallization reactor (2), a mother liquor outlet (18) is communicated with a mother liquor pipe (7) through a first communicating part, and a blow-washing pipe (8) in the mother liquor pipe (7) is communicated with a gas-introducing pipe (9) through a second communicating part; then, producing magma containing ammonium sulfate grains in a crystallization reactor (2), enabling the magma containing ammonium sulfate grains to enter a pre-thickener (1) from a magma feeding pipe (3) through a hydraulic pump, enabling an elutriation liquid to enter the pre-thickener (1) from an elutriation liquid inlet (5), opening a mother liquid outlet (18) at an opening and closing part, separating amide oil and mother liquid at the upper part of the pre-thickener (1), sorting ammonium sulfate crystals at the lower part of the pre-thickener (1) and thickening the serous fluid, discharging the thickened serous fluid from a thickened serous fluid outlet (6), enabling the separated mother liquid to enter a mother liquid pipe (7) through the mother liquid outlet (18), and finally recovering the mother liquid into a mother liquid tank; in the process of producing crystal slurry containing ammonium sulfate crystal grains by the crystallization reactor (2), generated steam enters the blowing and washing pipe (8), when the pressure in the blowing and washing pipe (8) is greater than the pressure in the mother liquor pipe (7), the adjusting part opens the air outlet (33), so that the steam in the blowing and washing pipe (8) is sprayed out of the mother liquor pipe (7) through the air outlet (33), and when the pressure in the blowing and washing pipe (8) is reduced to be equal to the pressure in the mother liquor pipe (7), the adjusting part seals the air outlet (33).

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