CN114082245A - Rinsing and purifying device and method for pentaerythritol - Google Patents
Rinsing and purifying device and method for pentaerythritol Download PDFInfo
- Publication number
- CN114082245A CN114082245A CN202111561126.2A CN202111561126A CN114082245A CN 114082245 A CN114082245 A CN 114082245A CN 202111561126 A CN202111561126 A CN 202111561126A CN 114082245 A CN114082245 A CN 114082245A
- Authority
- CN
- China
- Prior art keywords
- rinsing
- belt conveyor
- filter screen
- tank
- pentaerythritol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
- B01D21/04—Settling tanks with single outlets for the separated liquid with moving scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/28—Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
- B01D21/286—Means for gentle agitation for enhancing flocculation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/044—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are pervious for filtering
- B01D33/048—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are pervious for filtering with endless filtering bands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
- B01D33/60—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for washing
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/48—Overflow systems
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to a device and a method for rinsing and purifying pentaerythritol, which are characterized in that: the outlet at the bottom of the rinsing tank is connected with a slurry pipeline through a slurry pump, the outlet of the slurry pipeline is right opposite to the belt conveyor with the filter screen, the outlet end at the upper part of the belt conveyor with the filter screen is connected with the feed inlet of the settling tank, and the outlet end at the lower part of the belt conveyor with the filter screen is connected to the rinsing tank through a pipeline; materials at the bottom of the rinsing tank are conveyed to a belt conveyor with a filter screen through a slurry pump and a slurry pipeline, the materials are separated from the liquid in the process of conveying on the belt conveyor, and filtrate is collected by a collecting tank below the filter screen of the belt conveyor and then conveyed to the rinsing tank; and conveying the materials above the belt conveyor filter screen into a settling tank for settling. The invention has the advantages that: by adopting the rinsing device, the content of pentaerythritol reaches 95-97%, the device is not easy to damage, and the device can be cleaned once every year; if the slurry pump and the belt conveyor are damaged, the maintenance time is only 1 hour.
Description
Technical Field
The invention belongs to the technical field of chemical production, relates to the field of pentaerythritol production, and particularly relates to a device and a method for rinsing and purifying pentaerythritol.
Background
In the production of monopentaerythritol, dipentaerythritol, tripentaerythritol and polypentaerythritol are often generated due to side reactions, the extraction amount of dipentaerythritol is limited, if dipentaerythritol is not well extracted from the recovered mother liquor, the consumption of the whole production system is increased finally, the content of sodium formate as a byproduct is reduced, the viscosity of the system material is increased, the COD (chemical oxygen demand) of sewage is increased, and the quality of the pentaerythritol finished product is also reduced.
Patent publication No. CN112745197A (and CN 214233141U) discloses a device for rinsing and purifying pentaerythritol, which is capable of separating and purifying pentaerythritol according to the particle sizes of pentaerythritol, dipentaerythritol, polypentaerythritol and impurities; however, in actual production and use, the height of the bucket elevator reaches 10-15m, the bucket elevator mainly runs by a chain, and the bucket elevator is a closed box body and is easy to send out and damage (the damage period is 2-6 months), and once equipment failure occurs, the overhaul difficulty is high, the overhaul process is complicated, and the time and the production are consumed (5-10 h); this means that one overhaul needs to be forced to stop production for 5-10h, which seriously affects the continuity of production.
Disclosure of Invention
The invention aims to solve the problems that a bucket elevator in the device disclosed in the patent publication No. CN112745197A or CN214233141U is easy to damage in the using process, difficult to overhaul, long in time consumption and delayed in production; provides a device and a method for rinsing and purifying pentaerythritol.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a pentaerythritol's rinsing purification device, includes overflow launder, rinsing tank, subsider, scrapes trigger, its characterized in that: the bottom outlet of the rinsing tank is connected with a slurry pipeline through a slurry pump, the outlet of the slurry pipeline is right opposite to the belt conveyor with the filter screen (so that the solution at the outlet of the belt conveyor directly enters the belt conveyor with the filter screen), the upper outlet end of the belt conveyor with the filter screen is connected with the feed inlet of the settling tank, and the lower outlet end of the belt conveyor with the filter screen is connected to the rinsing tank through a pipeline.
Further, the slurry pipeline is vertical.
Furthermore, the upper end of the slurry pipeline is a bent pipe, and the outlet of the bent pipe at the upper part of the slurry pipeline is just opposite to the belt conveyor with the filter screen.
Furthermore, the belt conveyor with the filter screen is inclined.
Further, the inclination angle between the belt conveyor with the filter screen and the horizontal plane is 30-60 degrees.
Furthermore, the aperture of the filter screen in the belt conveyor with the filter screen is 30-50 meshes, the material of the filter screen is 316L stainless steel material, and the filter cloth is synthetic fiber.
A rinsing and purifying method of pentaerythritol comprises the prior rinsing, overflowing and settling steps, and is characterized by comprising the following steps:
conveying the material (pentaerythritol crystals) at the bottom of the rinsing tank to a belt conveyor with a filter screen through a slurry pump and a slurry pipeline, separating the material from the liquid in the process of conveying the material on the belt conveyor, and collecting filtrate through a collecting tank below the filter screen of the belt conveyor and then conveying the filtrate to the rinsing tank; and conveying the materials above the belt conveyor filter screen into a settling tank for settling.
Further, the conveying speed of the materials in the slurry pipeline is equal to the feeding speed (0.1-0.3 m) of the rinsing tank3Min) are kept consistent; if the speed is too high, the rinsing tank is pumped out, rinsing separation is insufficient, and if the speed is too low, the rinsing tank material overflows from an overflow port of the rinsing tank, so that pentaerythritol crystal liquid is lost to the next treatment section.
And further, filtrate in a collecting tank below the belt conveyor overflows to a rinsing tank by utilizing a potential difference, and the liquid level of the collecting tank is controlled by controlling washing water so as to maintain the dynamic balance of the rinsing tank.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the bucket elevator and the slide way are replaced by the slurry pump, the slurry pipeline and the belt conveyor with the filter screen, so that the equipment structure is simple, the equipment is more flexibly connected, and the equipment is easy to assemble, disassemble and maintain and is not easy to damage; thereby solving the problems of easy damage, inconvenient assembly and disassembly and long maintenance time of the bucket elevator in the original assembly device;
2. the material (pentaerythritol crystal) at the bottom of the rinsing tank is separated from the material liquid in a belt conveyor with a filter screen, filtrate can be collected by a collecting tank below the belt conveyor and recycled, large-particle material is gradually conveyed to a settling tank above the filter screen, a scraper is arranged at an outlet at the bottom of the settling tank and scrapes the material to a belt filter to produce a 95-grade pentaerythritol product, so that the purpose of separating pentaerythritol and dipentaerythritol is achieved;
3. by adopting the rinsing device, the content of pentaerythritol reaches 95-97%, the device hardly breaks down under the normal operation condition, and the device is cleaned once every year to prevent materials from depositing and blocking a filter screen and filter cloth; if the slurry pump and the belt conveyor are damaged, the overhaul time is only 1 hour.
Drawings
FIG. 1 is a schematic diagram of a device for rinsing and purifying pentaerythritol according to the present invention.
FIG. 2 is a diagram of a device for rinsing and purifying pentaerythritol disclosed in patent publication No. CN 112745197A.
Detailed Description
The invention is further illustrated with reference to fig. 1:
a rinsing and purifying device for pentaerythritol comprises the following equipment:
an overflow outlet of the rinsing tank is connected with an overflow tank, a bottom outlet of the rinsing tank is connected with an inlet of a slurry pump, an outlet of the slurry pump is connected with an upright slurry pipeline, an outlet of an upper elbow of the slurry pipeline is right opposite to a belt conveyor with a filter screen, an outlet end of the upper part of the filter screen of the belt conveyor with the filter screen is connected with a feed inlet of the settling tank, a scraper is arranged at an outlet of the bottom of the settling tank and connected with a belt filter, an outlet end of the lower part of the filter screen of the belt conveyor with the filter screen is connected to the rinsing tank through a pipeline, and an outlet of the upper part of the settling tank is connected to the rinsing tank through a pipeline;
wherein, the inclination angle between the belt conveyor with the filter screen and the horizontal plane is 45 degrees, the aperture of the filter screen is 30-50 meshes, the material of the filter screen is 316L stainless steel material, and the filter cloth is synthetic fiber.
A rinsing purification method of pentaerythritol comprises the following specific implementation steps:
example 1
(1) Sending 3000Kg of pentaerythritol crystal liquid into a rinsing tank, adding 600L of washing water (desalted water is adopted at the beginning of driving, the desalted water can also be recycled), controlling the liquid level of the rinsing tank to keep overflowing all the time, controlling the stirring speed to be 12r/min, separating large pentaerythritol crystal particles, dipentaerythritol and impurity fine particles in the rinsing tank in a layering way, and sending the liquid overflowing from the washing tank into an overflow tank;
(2) opening a slurry pump, conveying the bottom materials (large pentaerythritol crystal particles) in the washing tank to a belt conveyor with a filter screen, adding washing water (no washing water is adopted at the initial starting stage, and desalted water is adopted) into the belt conveyor, separating the materials from the liquid in the process of conveying the materials on the belt conveyor, collecting filtrate through a collecting tank below the filter screen of the belt conveyor, and then overflowing the filtrate to a rinsing tank through a pipeline; conveying the material above the belt conveyor filter screen into a settling tank for settling;
(3) opening a settling tank for stirring, controlling the stirring speed in the settling tank to be 12r/min, opening a scraper conveyor at the bottom of the settling tank after a settlement liquid level reaches an overflow port, enabling liquid overflowing out of the settling tank to enter an overflow tank, enabling materials (large pentaerythritol crystals) at the bottom of the settling tank to enter the scraper conveyor (20 r/min), then sending the materials into a belt filter for separation (adjusting the speed according to the amount of the materials to ensure that the materials are separated from mother liquor), recycling filtrate to a rinsing tank and a slideway as washing water, and separating and drying to obtain 690Kg (the content of the pentaerythritol is 94.0%) of a pentaerythritol finished product.
Example 2
(1) Sending 1200Kg of pentaerythritol crystal liquid into a rinsing tank, adding 520L of washing water (from a belt filter press in example 1) into the rinsing tank, controlling the liquid level of the rinsing tank to keep overflowing all the time, controlling the stirring speed to be 20r/min, separating large pentaerythritol crystals, dipentaerythritol and fine impurity particles in the rinsing tank in a layering manner, and feeding the liquid overflowing from a washing tank into an overflow tank;
(2) opening a slurry pump, conveying the bottom materials (large pentaerythritol crystals) in the washing tank to a belt conveyor with a filter screen, adding washing water (from a belt filter in example 1) into the belt conveyor, separating the materials from the liquid in the process of conveying the materials on the belt conveyor, collecting filtrate through a collecting tank below the filter screen of the belt conveyor, and then overflowing the filtrate to a rinsing tank through a pipeline; conveying the material above the belt conveyor filter screen into a settling tank for settling;
(3) opening a settling tank for stirring, controlling the stirring speed in the settling tank to be 20r/min, opening a scraper at the bottom of the settling tank after the settling liquid level reaches an overflow port, enabling liquid overflowing out of the settling tank to enter an overflow tank, enabling materials (large pentaerythritol crystals) at the bottom of the settling tank to enter the scraper (25 r/min), then sending the materials into a belt filter for separation, recycling filtrate to a rinsing tank and a slideway as washing water, and separating and drying to obtain 280Kg (content of 95.5%) of pentaerythritol finished products.
Example 3
(1) Delivering 4800 Kg of pentaerythritol crystal liquid into a rinsing tank, adding 780L of washing water (from a belt filter press in example 2) into the rinsing tank, controlling the liquid level of the rinsing tank to keep overflowing all the time, controlling the stirring speed to be 30r/min, separating large pentaerythritol crystals, dipentaerythritol and fine impurity particles in the rinsing tank in a layering manner, and delivering the liquid overflowing from a washing tank into an overflow tank;
(2) opening a slurry pump, conveying the bottom materials (large pentaerythritol crystals) in the washing tank to a belt conveyor with a filter screen, adding washing water (from a belt filter in example 2) into the belt conveyor, separating the materials from the liquid in the process of conveying the materials on the belt conveyor, collecting filtrate through a collecting tank below the filter screen of the belt conveyor, and then overflowing the filtrate to a rinsing tank through a pipeline; conveying the material above the belt conveyor filter screen into a settling tank for settling;
(3) opening a settling tank for stirring, controlling the stirring speed in the settling tank to be 30r/min, opening a scraper at the bottom of the settling tank after the settling liquid level reaches an overflow port, enabling liquid overflowing out of the settling tank to enter an overflow tank, enabling materials (large pentaerythritol crystals) at the bottom of the settling tank to enter the scraper (15 r/min), then sending the materials into a belt filter for separation, recycling filtrate to a rinsing tank and a slideway as washing water, and separating and drying to obtain 1200Kg (content of 96%) of pentaerythritol finished products.
Claims (10)
1. The utility model provides a pentaerythritol's rinsing purification device, includes overflow launder, rinsing tank, subsider, scrapes trigger, its characterized in that: the bottom outlet of the rinsing tank is connected with a slurry pipeline through a slurry pump, the outlet of the slurry pipeline is right opposite to the belt conveyor with the filter screen, the upper outlet end of the belt conveyor with the filter screen is connected with the feed inlet of the settling tank, and the lower outlet end of the belt conveyor with the filter screen is connected to the rinsing tank through a pipeline.
2. The rinsing and purifying device for pentaerythritol according to claim 1, characterized in that: the slurry pipeline is vertical.
3. The rinsing and purifying device for pentaerythritol according to claim 1 or 2, which is characterized in that: the upper end of the slurry pipeline is provided with a bent pipe, and the outlet of the bent pipe at the upper part of the slurry pipeline is just opposite to the belt conveyor with the filter screen.
4. The rinsing and purifying device for pentaerythritol according to claim 1, characterized in that: the belt conveyor with the filter screen is inclined.
5. The rinsing and purifying device for pentaerythritol according to claim 4, characterized in that: the inclined angle between the belt conveyor with the filter screen and the horizontal plane is 30-60 degrees.
6. The rinsing and purifying device for pentaerythritol according to claim 1, characterized in that: the aperture of the filter screen in the belt conveyor with the filter screen is 30-50 meshes, the filter screen is made of 316L stainless steel materials, and the filter cloth is made of synthetic fibers.
7. The rinsing and purifying method of the rinsing and purifying device of pentaerythritol as claimed in claim 1, which comprises the steps of rinsing, overflowing and settling, and is characterized by comprising the following steps:
materials at the bottom of the rinsing tank are conveyed to a belt conveyor with a filter screen through a slurry pump and a slurry pipeline, the materials are separated from the liquid in the process of conveying on the belt conveyor, and filtrate is collected by a collecting tank below the filter screen of the belt conveyor and then conveyed to the rinsing tank; and conveying the materials above the belt conveyor filter screen into a settling tank for settling.
8. The rinsing purification method of the rinsing purification device of pentaerythritol according to claim 1, characterized in that: the conveying speed of the materials in the slurry pipeline is consistent with the feeding speed of the rinsing tank.
9. The rinsing purification method of the rinsing purification device of pentaerythritol according to claim 8, characterized in that: the conveying speed of the materials in the slurry pipeline is 0.1-0.3m3/min。
10. The rinsing purification method of the rinsing purification device of pentaerythritol according to claim 1, characterized in that: filtrate in a collecting tank below the belt conveyor overflows to a rinsing tank by utilizing a potential difference, and the liquid level of the collecting tank is controlled by controlling washing water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561126.2A CN114082245A (en) | 2021-12-20 | 2021-12-20 | Rinsing and purifying device and method for pentaerythritol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561126.2A CN114082245A (en) | 2021-12-20 | 2021-12-20 | Rinsing and purifying device and method for pentaerythritol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114082245A true CN114082245A (en) | 2022-02-25 |
Family
ID=80308148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111561126.2A Pending CN114082245A (en) | 2021-12-20 | 2021-12-20 | Rinsing and purifying device and method for pentaerythritol |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114082245A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719578A (en) * | 2022-03-18 | 2022-07-08 | 广东潮艺金属实业有限公司 | Screw conveying mechanism and metal powder drying system |
-
2021
- 2021-12-20 CN CN202111561126.2A patent/CN114082245A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719578A (en) * | 2022-03-18 | 2022-07-08 | 广东潮艺金属实业有限公司 | Screw conveying mechanism and metal powder drying system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106140783B (en) | A kind of kitchen garbage homogenate exclusion device | |
| CN105132956A (en) | Continuous purification and impurity removing system for electrolyte | |
| CN114082245A (en) | Rinsing and purifying device and method for pentaerythritol | |
| CN208234678U (en) | A kind of tailing water sedimentation and thickening machine | |
| CN113733631A (en) | Efficient sand and impurity removing and oil extracting method and system for kitchen waste | |
| CN202860276U (en) | Tin concentrate dewatering combination equipment | |
| CN216457479U (en) | Rinsing purification device of pentaerythritol | |
| CN201737805U (en) | Wastewater treatment device made of corrugated paper | |
| CN209138863U (en) | Zero discharge system is retrieved in modularization washed-out sand | |
| CN1171905C (en) | Method and equipment for making starch | |
| CN216880986U (en) | Kitchen waste treatment system | |
| CN104436854A (en) | Slime water serial treatment system and slime water serial treatment process | |
| CN112279351B (en) | Method and system for recycling stone wastewater | |
| CN1923731A (en) | Sludge processing method for aluminum oxide factory waste water treatment station | |
| CN111359304B (en) | Slag water recovery system and recovery method for waste incineration slag separation plant | |
| CN210546982U (en) | Causticized slag recovery processing device | |
| CN101285278B (en) | Recovering process for white water of paper making by stewing type precipitation method | |
| CN208517541U (en) | A kind of micro-etched waste liquid industrial high-efficient processing unit | |
| CN208414077U (en) | A kind of secondary dense medium high efficiency water purifier handling Technique of Coal Mine Drainage | |
| CN216826638U (en) | Ore dressing system | |
| CN101053716A (en) | Coal Washing Water Separator | |
| CN204583077U (en) | A kind of powder slurry treatment system | |
| CN213049527U (en) | Automatic mud cleaning device of baffling pond | |
| CN209771439U (en) | Novel ammonia-soda process soda production waste liquid sand separating equipment | |
| CN115432794B (en) | Underground slime water treatment process and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |