CN114769204B - System and process for washing and removing impurities of solid powdery material - Google Patents
System and process for washing and removing impurities of solid powdery material Download PDFInfo
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- CN114769204B CN114769204B CN202210339193.8A CN202210339193A CN114769204B CN 114769204 B CN114769204 B CN 114769204B CN 202210339193 A CN202210339193 A CN 202210339193A CN 114769204 B CN114769204 B CN 114769204B
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- 238000005406 washing Methods 0.000 title claims abstract description 225
- 239000000463 material Substances 0.000 title claims abstract description 130
- 239000012535 impurity Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000007787 solid Substances 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 239000007788 liquid Substances 0.000 claims abstract description 87
- 238000004064 recycling Methods 0.000 claims abstract description 32
- 230000003068 static effect Effects 0.000 claims abstract description 20
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 238000004821 distillation Methods 0.000 claims description 33
- 238000011084 recovery Methods 0.000 claims description 24
- 239000002699 waste material Substances 0.000 claims description 21
- 239000012153 distilled water Substances 0.000 claims description 19
- 239000002351 wastewater Substances 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000005201 scrubbing Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 18
- BEFDCLMNVWHSGT-UHFFFAOYSA-N ethenylcyclopentane Chemical compound C=CC1CCCC1 BEFDCLMNVWHSGT-UHFFFAOYSA-N 0.000 description 12
- 229940075582 sorbic acid Drugs 0.000 description 12
- 235000010199 sorbic acid Nutrition 0.000 description 12
- 239000004334 sorbic acid Substances 0.000 description 12
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 7
- 239000000460 chlorine Substances 0.000 description 7
- 229910052801 chlorine Inorganic materials 0.000 description 7
- 239000012043 crude product Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000008234 soft water Substances 0.000 description 6
- 239000011343 solid material Substances 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000012847 fine chemical Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000005570 vertical transmission Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/102—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration with means for agitating the liquid
Landscapes
- Centrifugal Separators (AREA)
Abstract
The invention discloses a system and a process for washing and removing impurities of solid powdery materials, which belong to the technical field of material washing and removing impurities, and comprise a conveyor, a countercurrent washing device and a centrifuge; the countercurrent washing device comprises a tower body and a collecting bin, and the collecting bin is provided with a feed inlet; a rotating shaft, a static cone plate and a dynamic cone disc are arranged in the tower body; the movable cone disc is in an inverted disc-shaped structure and is connected with the rotating shaft; the static cone plate is in a conical tubular structure with a large upper part and a small lower part and is connected with the inner wall of the tower body; the bottom of the tower body is provided with a discharge hole, the lower part of the tower body is provided with a washing liquid recycling hole, and the collecting bin is provided with a washing liquid outlet. The materials are fed through a feed port, and washing water is introduced into the lower part of the tower body; the materials fall from top to bottom under the dead weight and the rotation of the movable conical disk, are in reverse contact with the washing water, are soaked and washed, and the material slurry enters the centrifugal machine from the discharge hole to carry out centrifugal operation, so that the materials can be fully and efficiently washed and decontaminated. The device has the advantages of simple integral structure and process, small volume, low operation energy consumption, reduction of solid-liquid contact dead zones and good practicality.
Description
Technical Field
The invention belongs to the technical field of material washing and impurity removal, and particularly relates to a solid powdery material washing and impurity removal system and process.
Background
In the fine chemical production, various raw materials and products have higher purity standards, especially the content requirements on impurity ions such as sodium, potassium, chlorine, sulfate radical and the like or other soluble impurities are more strict, and the process of washing and impurity removal is usually required in the production process of the products. The washing and impurity removal is an important means for material purification, plays a vital role in product quality control, so that the washing and impurity removal process is widely applied to the fields of fine chemical industry, medicines, chemical fertilizers and the like.
If in the process of producing sorbic acid, the crude sorbic acid product generated by acidolysis reaction contains about 2% -3% of hydrochloric acid, the washing and impurity removal process is needed, and the chloride ion content in the washed crude product is controlled to be less than 1000mg/kg and then the subsequent production process can be carried out to ensure that the produced sorbic acid finished product is qualified in chloride ion. The sorbic acid crude product is a solid particle which is slightly soluble in water, is difficult to disperse in water, is easy to cluster and aggregate, adopts a conventional washing mode, needs long-time stirring and repeated washing and centrifugation for many times, is complex in operation, and has large labor capacity and huge personnel and cost investment.
Currently, a series intermittent washing method is commonly adopted in the industry, and the washing flow is as follows: firstly mixing the solid material with desalted water (or industrial water) according to a certain proportion, fully stirring in a container for a period of time, then sending the mixture into a centrifuge or filtering equipment for solid-liquid separation, mixing the separated solid material with desalted water (or washing liquid) again according to a certain proportion, and repeating the above operation until the impurity content in the separated solid material is qualified.
However, the above-described tandem batch washing method has the following drawbacks:
1. the production efficiency is extremely low, repeated operation links such as mixing, stirring, sedimentation, centrifugal separation, conveying and the like are needed to achieve the washing effect, the operation period is long, and the washing efficiency is low;
2. Washing liquid is usually adopted for repeated washing, so that a large amount of washing wastewater is generated, and the wastewater treatment difficulty and the wastewater treatment cost are increased;
3. A complete set of equipment such as a matched feeding device, a stirring tank, a centrifugal machine or a filter press, a storage tank, a material transferring pump and the like is needed, so that the equipment investment is huge; under the condition of considering waste water reuse, different cleaning sequences are needed to ensure the cleaning effect, and a complete automatic control device is needed.
Disclosure of Invention
In order to solve the problems, the invention provides a system and a process for washing and removing impurities from solid powdery materials, which can realize full contact between the materials and washing water, effectively reduce solid-liquid contact dead zones and ensure full, thorough and efficient washing and removing impurities from the materials.
The invention is realized by the following technical scheme:
A system for washing and removing impurities from solid powdery materials comprises a conveyor, a countercurrent washing device and a centrifuge; the countercurrent washing device comprises a tower body and a collecting bin connected to the upper part of the tower body, and a feed inlet connected with the outlet end of the conveyor is arranged at the top of the collecting bin; a vertical rotating shaft, a plurality of static cone plates and a plurality of dynamic cone plates are arranged in the tower body at intervals from top to bottom; the movable cone disc is in an inverted disc-shaped structure and is connected with the rotating shaft; the static cone plate is in a conical tubular structure with a large upper part and a small lower part and is connected and installed with the inner wall of the tower body; the bottom of the tower body is provided with a discharge hole connected with the centrifugal machine, the lower part of the tower body is provided with a washing liquid recycling hole, and the collecting bin is provided with a washing liquid outlet.
The invention further improves that the static cone plate comprises a cone-shaped upper cone plate; the movable cone disc comprises a semi-open impeller capable of centrifugally pushing materials and a lower cone plate connected to the outer edge of the semi-open impeller, the semi-open impeller is connected with the rotating shaft, the lower cone plate is of a conical tubular structure with a small upper part and a large lower part, and a gap is reserved between the lower edge of the lower cone plate and the inner wall of the tower body.
The invention is further improved, and the included angles between the upper cone plate and the lower cone plate and the horizontal line are J1 and J2 respectively; j1 And the angle of repose of the material in the still water is more than or equal to the angle of repose of the material in the still water, and J2 is less than the angle of repose of the material in the still water.
The invention further improves that the lower edge of the upper conical plate is connected with a cylinder.
The invention is further improved, the distance between the lower edge of the cylinder and the upper surface of the semi-open impeller is H, the inner diameter of the cylinder is R1, and the radius of the semi-open impeller is R2; r2 is more than or equal to R1+H.
The invention further improves that the lower part of the aggregate bin is in a conical tubular structure.
The invention further improves that the bottom of the tower body is in a cone-shaped structure, and the included angle between the side wall of the cone-shaped structure and the horizontal line is larger than the repose angle of the material in still water.
The invention further improves, also comprises a washing liquid inlet arranged at the lower part of the tower body; the washing water outlet of the centrifugal machine is connected with the washing liquid inlet through a recycling washing water conveying pipe.
The invention further improves, also comprises a distillation recovery device and an oil drain port which is connected with the side wall of the tower body and is arranged at the lower side of the upper edge connecting position of each upper conical plate; the oil drain port is connected with the distillation recovery device through an oily wastewater conveying pipe; the washing liquid outlet is connected with the distillation recovery device through a washing waste liquid conveying pipe, and the distilled water outlet of the distillation recovery device is connected with the washing liquid recycling port through a recycling distilled water conveying pipe.
The other aspect of the invention is realized by the following technical scheme:
a washing and impurity removing process for solid powdery materials comprises the following steps:
1) Introducing washing water into a countercurrent washing device through a washing liquid recycling port; the material to be washed is conveyed to a collecting bin at the top of the countercurrent washing device through a conveyor, the material falls down step by step from top to bottom under the action of self gravity and the rotation of a movable conical disc driven by a rotating shaft, and in the falling process of the material, the material is in reverse full contact with washing water, is soaked and washed, and soluble impurities in the material are diffused into the washing water;
2) The washed material slurry enters a centrifugal machine from the bottom of a countercurrent washing device to carry out centrifugal operation, and finished material and recycled washing water are produced after the centrifugal operation; the finished product material is conveyed to the next working procedure through a finished product conveying pipe, and the recycled washing water sequentially enters the bottom of the countercurrent washing device through the recycled washing water conveying pipe and the washing liquid inlet to participate in washing again;
3) The washed waste liquid enters a distillation recovery device from a washing liquid outlet and a washing waste liquid conveying pipe at the upper part of the countercurrent washing device; distilled water generated by distillation is conveyed into a countercurrent washing device through a recycled distilled water conveying pipe and a washing liquid recycling port to participate in washing again; the residual oil residue generated by distillation is sent to coal blending treatment through a discharge pipe;
4) The oily wastewater discharged from each stage in the countercurrent washing device sequentially enters the distillation recovery device through the oil discharge port and the oily wastewater conveying pipe; and the waste washing liquid are distilled by a distillation recovery device.
From the technical scheme, the beneficial effects of the invention are as follows:
The conveyor conveys solid powdery materials to be washed and decontaminated to a collecting bin for temporary storage through a charging port, the soft water conveying pipe adds washing water to the lower part of the tower body through a washing liquid recycling port, and the rotating shaft drives the movable cone disc to rotate; under the action of self gravity and the rotation of the movable conical disc, the materials fall from top to bottom step by step, the washing water flows from bottom to top, and in the falling process of the materials, the materials are in reverse full contact with the washing water, are soaked and washed, and soluble impurities in the materials are diffused into the washing water; the washing waste liquid is discharged from a washing liquid outlet at the upper part, and the washed material slurry enters a centrifugal machine from a discharge hole at the bottom to carry out centrifugal operation, so that continuous, full and efficient washing and impurity removal of solid powdery materials, especially viscous, easy-to-cluster and condensed organic materials, are realized, and finished product materials are obtained. The device has the advantages of simple integral structure and process, convenient operation, small volume, low manufacturing cost and low equipment operation energy consumption, and can realize full contact of materials and washing water by a plurality of static cone plates and dynamic cone plates which are arranged up and down in pairs, effectively reduce solid-liquid contact dead areas and ensure full, thorough and efficient washing and impurity removal of the materials. The production amount of the washing wastewater is less, the material carrying loss of the washing liquid is greatly reduced, and the labor intensity and the washing time are greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a system according to an embodiment of the present invention.
FIG. 2 is a schematic view of a countercurrent washing apparatus according to an embodiment of the present invention.
FIG. 3 is a schematic view of a structure of a moving cone disc and a static cone disc according to an embodiment of the present invention.
Fig. 4 is a schematic top view of a movable cone disc according to an embodiment of the present invention.
In the accompanying drawings: 1. a collecting bin; 2. a feed inlet; 3. a washing liquid outlet; 4. a tower body; 5. a movable cone disc; 51. a semi-open impeller; 52. a blade; 53. a lower cone plate; 6. a static cone plate; 61. a cylinder; 62. an upper cone plate; 7. a washing liquid inlet; 8. a stirrer; 9. a manhole; 10. a discharge port; 11. a washing liquid recycling port; 12. an observation hole; 13. a variable frequency motor; 14. pin wheel cycloidal reducer; 15. a rotating shaft; 16. an oil drain port; 17. a bearing seat; 18. a conveyor; 19. a distillation recovery device; 20. a washing waste liquid conveying pipe; 21. an oily wastewater delivery pipe; 22. recycling distilled water conveying pipes; 23. a soft water delivery pipe; 24. a discharge pipe; 25. a solid slurry delivery pipe; 26. a centrifuge; 27. a recycled washing water conveying pipe; 28. and (5) a finished product conveying pipe.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the invention are intended to be within the scope of the patent protection.
As shown in fig. 1-4, the present invention discloses a solid powder material scrubbing and impurity removal system comprising a conveyor 18, a counter-current scrubbing device and a centrifuge 26; the countercurrent washing device comprises a vertical cylindrical tower body 4 and a collecting bin 1 connected to the upper part of the tower body 4, wherein the top of the collecting bin 1 is provided with a feed inlet 2 connected with the outlet end of a conveyor 18; the tower body 4 is rotatably provided with a vertical rotating shaft 15, a plurality of static cone plates 6 and a plurality of dynamic cone plates 5 which are arranged at intervals from top to bottom; the movable cone disc 5 is in an inverted disc-shaped structure, and the center of the movable cone disc is fixedly connected and installed with the rotating shaft 15; the static cone plate 6 is in a conical tubular structure with a large upper part and a small lower part, and the outer edge of the static cone plate is welded, sealed and fixed with the inner wall of the tower body 4; the bottom of the tower body 4 is provided with a discharge hole 10 connected with a centrifugal machine 26, the lower part of the tower body 4 is provided with a washing liquid recycling hole 11, and the collecting bin 1 is provided with a washing liquid outlet 3. The washing liquid recycling port 11 is connected with a soft water conveying pipe 23; the discharge port 10 is connected with a centrifugal machine 26 through a solid slurry conveying pipe 25, and finished product materials centrifuged by the centrifugal machine 26 are output through a finished product conveying pipe 28.
The conveyor 18 conveys solid powdery materials (such as sorbic acid crude products containing hydrochloric acid) to be washed and decontaminated, the solid powdery materials are temporarily stored in the collecting bin 1 through the feeding port 2, the soft water conveying pipe 23 adds washing water into the lower part of the tower body 4 through the washing liquid recycling port 11, and the rotating shaft 15 drives the movable conical disc 5 to rotate; under the action of self gravity and the rotation of the movable cone disc 5, the materials fall from top to bottom step by step, the washing water flows upwards from bottom to top, and in the falling process of the materials, the materials are fully contacted with the washing water reversely, soaked and washed, and soluble impurities in the materials are diffused into the washing water; the washing waste liquid is discharged from the washing liquid outlet 3 at the upper part, and the washed material slurry enters the centrifugal machine 26 from the discharge hole 10 at the bottom for centrifugal operation, so that the full and efficient washing and impurity removal of the solid powdery material are realized, and the finished product material is obtained. The whole structure, simple process, simple operation, small volume, low cost, through a plurality of static cone plates 6 and moving cone plates 5 arranged up and down in pairs, can realize the full contact of material and washing water, effectively reduce solid-liquid contact blind area, guarantee to wash the edulcoration of material abundant, thoroughly, efficient.
As shown in fig. 1, the system further comprises a washing liquid inlet 7 arranged at the lower part of the tower body 4; the washing water outlet of the centrifuge 26 is connected to the washing liquid inlet 7 through a recycled washing water delivery pipe 27. The washing liquid centrifuged by the centrifuge 26 flows back to the inside of the tower body 4 through the recycled washing water conveying pipe 27 for re-washing, thereby effectively saving the washing water, avoiding the waste of water resources, saving the cost and avoiding the loss and the waste of materials.
The system also comprises a distillation recovery device 19 and an oil drain port 16 which is connected to the side wall of the tower body 4 and is arranged on the lower side of the connecting position of each upper conical plate 62; the oil drain port 16 is connected with a distillation recovery device 19 through an oily wastewater conveying pipe 21; the washing liquid outlet 3 is connected with the distillation recovery device 19 through a washing waste liquid conveying pipe 20, and the distilled water outlet of the distillation recovery device 19 is connected with the washing liquid recycling port 11 through a recycling distilled water conveying pipe 22. Because the washing liquid possibly contains a small amount of insoluble light impurities such as oil (the density is less than that of the washing liquid), the insoluble light impurities can be accumulated in the lower space of the upper conical plate 62 along the connection position with the inner wall of the tower body 4 in the washing process, can be discharged at regular time through the oil drain port 16, and enter the distillation recovery device 19 together with the washing waste liquid after material washing to carry out distillation operation, and distilled water generated by distillation is conveyed to the lower part of the tower body 4 through the recycled distilled water conveying pipe 22 and the washing liquid recycling port 11 to participate in washing again; the residue from the distillation is discharged through discharge pipe 24. The washing liquid recycling can be realized, the consumption of the washing liquid is saved, the waste of water resources is avoided, the cost is saved, and the material loss and waste can be avoided.
The position of the washing liquid recycling port 11 is slightly higher than that of the washing liquid inlet 7, and the washing liquid recycling port 11 and the washing liquid recycling port are arranged opposite to the tower body 4, as the water flow in the tower body 4 is in the upward flowing direction, trace oil and the like can be contained in distilled water which flows back from the washing liquid recycling port 11, the recycled distilled water of the washing liquid recycling port 11 is pushed upward by the recycling washing liquid of the washing liquid inlet 7, the contact adhesion subsidence of the recycling distilled water containing trace oil and materials can be effectively avoided, the purity of the materials output by the discharge port 10 is ensured, and the material washing impurity removing effect is ensured.
Wherein, as shown in fig. 2-4, the static cone plate 6 comprises an upper cone plate 62 with a big upper part and a small lower part in a cone shape; the movable cone disc 5 comprises a semi-open impeller 51 capable of centrifugally pushing materials and a lower cone plate 53 connected to the outer edge of the semi-open impeller 51, the semi-open impeller 51 is connected with the rotating shaft 15, the lower cone plate 53 is of a conical tubular structure with a small upper part and a large lower part, a gap is reserved between the lower edge of the lower cone plate 53 and the inner wall of the tower body 4, and the gap is larger than the maximum particle size of the materials, so that the materials can fall smoothly. The materials are gathered through the upper conical plate 62, the materials are accumulated on the upper side of the semi-open impeller 51, the semi-open impeller 51 is driven to rotate through the rotating shaft 15, the materials are pushed and spread to the outer ring, the materials enter the next washing and impurity removing unit from the gap between the outer edge of the lower conical plate 53 and the inner wall of the tower body 4, and washing water reversely flows from bottom to top; the purity of different washing edulcoration of material can be realized through setting up a plurality of washing edulcoration units that comprise quiet cone plate 6 and movable cone dish 5, the flexibility and the convenience of use are guaranteed. Through the static cone plate 6 and the movable cone disk 5 which are arranged in pairs, the full contact between the materials and the washing water can be realized, the solid-liquid contact dead zone is reduced, and the sufficiency and the thoroughness of the impurity removal of the materials are ensured.
As shown in fig. 4, the bottom of the semi-open impeller 51 is in a circular flat plate structure, and the upper side of the semi-open impeller is provided with blades 52 capable of centrifugally pushing materials; the number of the blades 52 is one or a plurality of annular arrays, and is matched with the rotation direction of the rotating shaft 15; the materials accumulated on the upper side of the semi-open impeller 51 can be continuously pushed and spread outwards by the rotation of the blades 52.
The tower body 4, the rotating shaft 15, the movable cone disc 5 and the static cone plate 6 are all concentrically arranged.
Wherein, the included angles between the upper cone plate 62 and the lower cone plate 53 and the horizontal line are J1 and J2 respectively; j1 The repose angle of the material in the still water is not less than, the free falling of the material under the self gravity can be ensured, and the falling power of the material is ensured; j2 < the repose angle of the material in still water, and as small as possible, can reduce the height of the movable conical disc 5 to the greatest extent, thereby reducing the overall height of the countercurrent washing device, ensuring smaller volume and flexibility of use, and reducing investment cost.
Wherein, the lower edge of the upper cone plate 62 is connected with a cylinder 61. The material falling onto the semi-open impeller 51 in the upper conical plate 62 can be guided and shielded by the cylinder 61, so that the falling speed of the material is prevented from being too high.
Wherein, the distance between the lower edge of the cylinder 61 and the upper surface of the semi-open impeller 51 is H, the inner diameter of the cylinder 61 is R1, and the radius of the semi-open impeller 51 is R2; r2 is more than or equal to R1+H, H is selected to be 3 cm-20 cm, the materials are effectively prevented from being directly scattered in the area except the semi-open impeller 51, and the reliability of material washing and impurity removal is ensured.
Wherein, the radius of the inner wall of the tower body 4 is R0, R1= (1/4-1/2) R0, so that the blockage caused by too high accumulation of materials in the upper conical plate 62 is avoided, and the smoothness of the falling of the materials is ensured.
Wherein, the lower part of the aggregate bin 1 is of a cone-shaped structure, the structure is similar to the static cone plate 6, the included angle between the side wall of the cone-shaped structure and the horizontal line is more than or equal to J1, the smooth falling of materials is ensured, and the blockage of the materials is avoided. The lower edge of the conical tubular structure of the aggregate bin 1 is provided with a cylinder 61 which can be used as a washing impurity removing unit together with the movable conical disc 5 which is arranged at the uppermost end singly.
The bottom of the tower body 4 is in a conical cylindrical structure, and the included angle between the side wall of the conical cylindrical structure and a horizontal line is larger than the repose angle of the material in still water. Ensure that the washed material slurry can smoothly fall to the discharge port 10 and be discharged by the discharge port 10, thereby avoiding blockage.
As shown in fig. 2, a manhole 9 and an observation hole 12 are provided at the lower part of the tower body 4, and the observation hole 12 is provided at the upper side of the movable cone disc 5 at the lowest end. The material falling condition can be intuitively and conveniently observed through the observation hole 12, so that various parameters (material feeding speed, washing water rising speed and rotating shaft 15 rotating speed) are adjusted, the flow rate of the washing liquid is required to be ensured to be less than the sedimentation speed of the solid material, and the material can fall at a certain speed in the washing process; the manhole 9 can facilitate maintenance work for the inside of the countercurrent washing device.
Wherein, variable frequency motor 13 and pinwheel cycloidal reducer 14 are installed at collection silo 1 top, and variable frequency motor 13, pinwheel cycloidal reducer 14 and pivot 15 are vertical transmission in proper order and are connected, through adjusting variable frequency motor 13 rotational speed, can realize the regulation to pivot 15 and moving cone dish 5 rotational speed to realize piling up the nimble regulation to the outward diffusion speed of material in semi-open impeller 51 upside, thereby realize the control to blanking speed. All the rotating parts are vertically installed, the rotating shafts of all the rotating parts are on the same straight line, the equipment operates more stably, and the equipment maintenance period is long.
The lower end of the rotating shaft 15 is connected and installed with the inner wall of the tower body 4 through a bearing seat 17, so that the rotating stability and the rotating accuracy of the rotating shaft 15 are ensured; the lower extreme of pivot 15 is equipped with agitator 8, stirs the material thick liquids of tower body 4 bottom through agitator 8, guarantees the smoothness nature of material thick liquids whereabouts, avoids the material jam.
The invention also discloses a solid powdery material washing and impurity removing process, which comprises the following steps:
1) The washing water is introduced into a countercurrent washing device through a washing liquid recycling port 11; the materials to be washed are conveyed to a collecting bin 1 at the top of the countercurrent washing device through a conveyor 18, the materials fall step by step from top to bottom under the action of self gravity and the rotation of a rotating shaft 15, the materials are in reverse full contact with washing water in the falling process of the materials, the materials are soaked and washed, and soluble impurities in the materials are diffused into the washing water;
2) The washed material slurry enters a centrifugal machine 26 from the bottom of the countercurrent washing device to carry out centrifugal operation, and finished material and recycled washing water are produced after the centrifugal operation; the finished product material is conveyed to the next working procedure through a finished product conveying pipe 28, and the recycled washing water sequentially enters the bottom of the countercurrent washing device through a recycled washing water conveying pipe 27 and a washing liquid inlet 7 to participate in washing again;
3) The washed waste liquid enters a distillation recovery device 19 from a washing liquid outlet 3 and a washing liquid conveying pipe 20 at the upper part of the countercurrent washing device; distilled water generated by distillation is conveyed into a countercurrent washing device through a recycled distilled water conveying pipe 22 and a washing liquid recycling port 11 to participate in washing again through distillation recovery device 19; the residual oil residue generated by distillation is sent to coal blending treatment through a discharge pipe 24;
4) The oily wastewater discharged from each stage in the countercurrent washing device is sequentially conveyed to the distillation recovery device 19 through the oil discharge port 16 and the oily wastewater conveying pipe 21; the waste washing liquid is distilled together with the waste washing liquid by a distillation recovery device 19.
The steps are carried out at normal temperature and normal pressure.
Wherein, the soft water conveying pipe 23 can supplement water to the countercurrent washing device at regular time and quantity, thereby ensuring the sufficiency of the washing water.
The following is a further explanation of the removal of impurities by washing the crude sorbic acid product with chlorine content not less than 25000 mg/L:
In the step 1, the solid-liquid ratio of the sorbic acid crude product to the circulating amount of the washing water is 1:1-1:1.3, so that the purposes of achieving good washing effect and reducing the wastewater production are met; the soft water supplementing amount is 10% -15% of the washing water circulating amount;
In the step 2, the chlorine content of the crude sorbic acid product after washing is less than or equal to 1000mg/kg, and no obvious oil stain exists; the chlorine content of the recycled washing water is less than or equal to 80mg/L;
In the steps 3 and 4, the chloride ion of the recycled distilled water is less than or equal to 80mg/L.
In the process of producing sorbic acid, the crude sorbic acid product generated by the reaction usually contains about 2% -3% of hydrochloric acid, the process of washing and impurity removal is needed, and the chloride ion content in the washed crude product is controlled to be less than 1000ppm and then the crude product enters the subsequent production process to ensure that the produced sorbic acid finished product chloride ion is qualified.
The specific wash effect data for the conventional process versus the present process are shown in the following table:
| The washing mode is as follows: | washing with clear water and centrifuging | Multistage continuous soaking and washing |
| Amount of crude solids kg | 200 | 200 |
| The dosage L of clear water | 300 | 240 |
| Washing times | 10 | 1 (10 Level) |
| Centrifuging for several times | 10 | 1 |
| Export crude chlorine content mg/kg | 395 | 304 |
| Chlorine content mg/L at the outlet of the first washing water | 29810.2 | 33008 |
| Chlorine content mg/L of last washing water outlet | 48.1 | 49.3 |
| Number of times of material transfer | 10 | 1 |
| Washing time h | 11 | 0.6 |
As shown in the table, the sorbic acid crude product is treated by adopting the multistage continuous soaking and washing mode of the process, the washing water quantity is less, the labor intensity and the washing time are greatly reduced, and the washing efficiency is higher.
The system and the process for washing and removing impurities of the solid powdery material use the conical plate as the power for material falling, effectively solve the problems that the scraper in the traditional washing equipment cannot process viscous, easily-condensed and agglomerated organic materials, and can effectively solve the problems that the traditional equipment is easy to block, the solid materials cannot be normally discharged and the equipment fails; the washing part is more reasonable in design, the solid material advancing path in the equipment is longer, the solid-liquid contact dead zone is smaller, the solid-liquid two-phase mixing is more complete, the washing efficiency is high, the equipment operation energy consumption is low, and the washing effect is good. The whole structure and the process are simple, the operation is convenient and fast, and the volume is small.
In the present specification, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between the embodiments are only required to be referred to each other.
The terms "upper", "lower", "outside", "inside", and the like in the description and in the claims of the present invention and in the above drawings, if any, are used for distinguishing between relative relationships in position and not necessarily for giving qualitative sense. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A system for washing and decontaminating solid powdery materials, characterized by comprising a conveyor (18), a countercurrent washing device and a centrifuge (26); the countercurrent washing device comprises a tower body (4) and a collecting bin (1) connected to the upper part of the tower body (4), wherein a feed inlet (2) connected with the outlet end of a conveyor (18) is arranged at the top of the collecting bin (1); a vertical rotating shaft (15), a plurality of static cone plates (6) and dynamic cone discs (5) which are arranged at intervals from top to bottom are arranged in the tower body (4); the movable cone disc (5) is in an inverted disc-shaped structure and is connected with the rotating shaft (15); the static cone plate (6) is in a conical tubular structure with a large upper part and a small lower part, and the outer edge of the static cone plate is welded, sealed and fixed with the inner wall of the tower body (4); a discharge hole (10) connected with a centrifugal machine (26) is arranged at the bottom of the tower body (4), a washing liquid recycling hole (11) is arranged at the lower part of the tower body (4), and a washing liquid outlet (3) is arranged on the collecting bin (1); the washing liquid inlet (7) is arranged at the lower part of the tower body (4); the washing water outlet of the centrifugal machine (26) is connected with the washing liquid inlet (7) through a recycling washing water conveying pipe (27); the finished product materials centrifuged by the centrifuge (26) are output through a finished product conveying pipe (28); the static cone plate (6) comprises a cone-shaped upper cone plate (62); the movable cone disc (5) comprises a semi-open impeller (51) capable of centrifugally pushing materials and a lower cone plate (53) connected to the outer edge of the semi-open impeller (51), the semi-open impeller (51) is connected with the rotating shaft (15), the lower cone plate (53) is in a conical tubular structure with a small upper part and a large lower part, and a gap is reserved between the lower edge of the lower cone plate and the inner wall of the tower body (4); the bottom of the semi-open impeller (51) is of a circular flat plate structure, and blades (52) capable of centrifugally pushing materials are arranged on the upper side of the semi-open impeller; the vane (52) is matched with the rotation direction of the rotating shaft (15); the distillation recovery device (19) and an oil drain port (16) which is connected to the side wall of the tower body (4) and is arranged at the lower side of the upper edge connecting position of each upper conical plate (62); the oil drain port (16) is connected with a distillation recovery device (19) through an oil-containing wastewater conveying pipe (21); the washing liquid outlet (3) is connected with the distillation recovery device (19) through a washing waste liquid conveying pipe (20), and the distilled water outlet of the distillation recovery device (19) is connected with the washing liquid recycling port (11) through a recycling distilled water conveying pipe (22).
2. The solid powder material washing and impurity removing system according to claim 1, wherein the angles between the upper cone plate (62) and the lower cone plate (53) and the horizontal line are J1 and J2, respectively; j1 And the angle of repose of the material in the still water is more than or equal to the angle of repose of the material in the still water, and J2 is less than the angle of repose of the material in the still water.
3. The system for scrubbing and removing impurities from solid powder material as defined in claim 1, wherein a cylinder (61) is provided at the lower edge of the upper conical plate (62).
4. A solid powdery material washing and impurity removing system according to claim 3, wherein the space between the lower edge of the cylinder (61) and the upper surface of the semi-open impeller (51) is H, the inner diameter of the cylinder (61) is R1, and the radius of the semi-open impeller (51) is R2; r2 is more than or equal to R1+H.
5. The system for washing and removing impurities from solid powdery materials according to claim 1, wherein the lower part of the collecting bin (1) is in a conical tubular structure.
6. The system for washing and removing impurities from solid powdery materials according to claim 1, wherein the bottom of the tower body (4) is in a conical tubular structure, and the included angle between the side wall of the conical tubular structure and the horizontal line is larger than the repose angle of the materials in still water.
7. A process for washing and removing impurities from a solid powdery material, which is characterized by comprising the system for washing and removing impurities from a solid powdery material according to any one of claims 1 to 6;
The method also comprises the following steps:
1) The washing water is introduced into a countercurrent washing device through a washing liquid recycling port (11); the materials to be washed are conveyed to a collecting bin (1) at the top of the countercurrent washing device through a conveyor (18), the materials fall step by step from top to bottom under the action of self gravity and the rotation of a rotating shaft (15) to drive a movable conical disc (5), the materials are in reverse full contact with washing water in the falling process of the materials, the materials are soaked and washed, and soluble impurities in the materials are diffused into the washing water;
2) The washed material slurry enters a centrifugal machine (26) from the bottom of the countercurrent washing device to carry out centrifugal operation, and finished material and recycled washing water are produced after the centrifugal operation; the finished product material is conveyed to the next working procedure through a finished product conveying pipe (28), and the recycled washing water sequentially enters the bottom of the countercurrent washing device through a recycled washing water conveying pipe (27) and a washing liquid inlet (7) to participate in washing again;
3) The washed waste liquid enters a distillation recovery device (19) from a washing liquid outlet (3) and a washing waste liquid conveying pipe (20) at the upper part of the countercurrent washing device; distilled water generated by distillation is conveyed into a countercurrent washing device through a recycled distilled water conveying pipe (22) and a washing liquid recycling port (11) to participate in washing again; the residual oil residue generated by distillation is sent to coal blending treatment through a discharge pipe (24);
4) The oily wastewater discharged from each stage in the countercurrent washing device sequentially enters the distillation recovery device (19) through the oil discharge port (16) and the oily wastewater conveying pipe (21); the waste washing liquid is distilled together with the waste washing liquid by a distillation recovery device (19).
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| CN202210339193.8A CN114769204B (en) | 2022-04-01 | 2022-04-01 | System and process for washing and removing impurities of solid powdery material |
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| GB2018560A (en) * | 1978-04-04 | 1979-10-24 | Gen Foods Ltd | Countercurrent multi stage slurry extraction of coffee |
| CN102335520A (en) * | 2010-07-22 | 2012-02-01 | 天津科技大学 | Multilayer fluidized solid continuous distillation column |
| CN108219135A (en) * | 2017-12-25 | 2018-06-29 | 浙江新和成特种材料有限公司 | A kind of continuous washing device of polyphenylene sulfide |
| CN111036150A (en) * | 2019-12-02 | 2020-04-21 | 河南金鹏化工有限公司 | Process and device for continuously producing thiodicarb by alcohol washing |
| CN111494985A (en) * | 2020-05-25 | 2020-08-07 | 张掖征峰科技有限公司 | Multistage continuous countercurrent washing leaching equipment and method |
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2022
- 2022-04-01 CN CN202210339193.8A patent/CN114769204B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2018560A (en) * | 1978-04-04 | 1979-10-24 | Gen Foods Ltd | Countercurrent multi stage slurry extraction of coffee |
| CN102335520A (en) * | 2010-07-22 | 2012-02-01 | 天津科技大学 | Multilayer fluidized solid continuous distillation column |
| CN108219135A (en) * | 2017-12-25 | 2018-06-29 | 浙江新和成特种材料有限公司 | A kind of continuous washing device of polyphenylene sulfide |
| CN111036150A (en) * | 2019-12-02 | 2020-04-21 | 河南金鹏化工有限公司 | Process and device for continuously producing thiodicarb by alcohol washing |
| CN111494985A (en) * | 2020-05-25 | 2020-08-07 | 张掖征峰科技有限公司 | Multistage continuous countercurrent washing leaching equipment and method |
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