CN116079942A - Treatment process for reducing impurity particles in PVC resin production process - Google Patents
Treatment process for reducing impurity particles in PVC resin production process Download PDFInfo
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- CN116079942A CN116079942A CN202211518942.XA CN202211518942A CN116079942A CN 116079942 A CN116079942 A CN 116079942A CN 202211518942 A CN202211518942 A CN 202211518942A CN 116079942 A CN116079942 A CN 116079942A
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- Prior art keywords
- pvc resin
- drying
- hot air
- production process
- impurity particles
- 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.)
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- 239000011347 resin Substances 0.000 title claims abstract description 48
- 229920005989 resin Polymers 0.000 title claims abstract description 48
- 239000012535 impurity Substances 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000002245 particle Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000008569 process Effects 0.000 title claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 65
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000012216 screening Methods 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 description 10
- 230000006872 improvement Effects 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
- B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/16—Auxiliary treatment of granules
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a treatment process for reducing impurity particles in the production process of PVC resin, which comprises the following steps: the method comprises the following steps of: pre-drying PVC resin powder; step 2: the PVC resin is sent into a drying tower for drying; step 3: the PVC resin after drying is selected and sent into a drying bed through a separator; step 4: screening the dried materials by a cyclone separator and then sending the screened materials into a vibrating screen; step 5: falls into the discharging bin through the vibrating screen. The invention has the beneficial effects that: the high quality rate of the products is improved, the impurities are reduced, and the equipment modification cost is low.
Description
Technical Field
The invention relates to a PVC resin production process, in particular to a treatment process for reducing impurity particles in the PVC resin production process.
Background
In the current stage, the high impurity content in the pvc resin production process is an important reason for influencing the product yield; the high impurity content can influence the stability of PVC resin, and at the production technology stage, because the humidity of raw materials is high, processing equipment has the dead angle, simultaneously in the drying tower when the product ginseng produce pile up, be heated for a long time, lead to the resin to receive the high temperature and stay time overlength to lead to producing the matter particle of discolouring in the PVC resin.
Disclosure of Invention
In order to solve the problems, the invention discloses a treatment process for reducing impurity particles in the PVC resin production process, which improves the quality rate of products, reduces impurities and has low equipment modification cost.
The treatment process for reducing impurity particles in the PVC resin production process comprises the following steps: comprises the steps of,
step 1: pre-drying PVC resin powder;
step 2: the PVC resin is sent into a drying tower for drying;
step 3: the PVC resin after drying is selected and sent into a drying bed through a separator;
step 4: screening the dried materials by a cyclone separator and then sending the screened materials into a vibrating screen;
step 5: falls into the discharging bin through the vibrating screen.
The further improvement is that: the drying bed adopts a cyclone drying bed; the uniformity of hot air distribution is improved, and the heating stability is ensured; the periphery of the drying bed is free of dead angles, and effective flow of resin is achieved.
The further improvement is that: the drying temperature of the step 1 is 100-120 ℃.
The further improvement is that: the temperature in the drying tower in the step 3 is 130-145 ℃.
The further improvement is that: the bottom of the drying tower is provided with two branch bins; the connection between each branch bin is an arc transition surface; each branch bin is provided with a hot air port; the two ends of the total hot air blower are respectively connected with a hot air pipe; one end of the hot air pipe is connected with the hot air port; wherein the top of the drying tower is connected with the cyclone separator through a discharge hole; wherein a plurality of perforated plates are sequentially arranged above each hot air port; wherein the feed inlet is positioned above the perforated plate; wherein the size of the perforated plate is sequentially reduced from top to bottom; and each hot air port is provided with a regulating valve.
The further improvement is that: and a manhole is arranged on the branch bin, so that the overhaul is convenient.
The further improvement is that: the vibrating screen is a multilayer vibrating screen, the discharging is uniform, and the collecting is convenient.
The further improvement is that: the drying in the step 1 comprises the steps of feeding the materials into an oven for pre-drying for 30-60 minutes.
The working principle of the invention is as follows: firstly, the PVC resin raw material is sent into a drying oven to be pre-dried, the PVC resin raw material is dehumidified, then the PVC resin raw material is sent into a drying tower, hot air is sent into the drying tower through a hot air pipe by a total hot air machine, the pre-dried PVC resin raw material is sent into the drying tower, hot air is used for drying the PVC resin raw material and sent into a cyclone separator through a discharge hole to be subjected to winnowing and collection, and as 2 hot air pipes are arranged in the drying tower, when the PVC resin raw material is winnowed upwards along with hot air, a part of materials with heavy particles can fall on an opening plate, and the falling materials can be prevented from being gathered together by arranging the 2 hot air pipes, so that the distribution is facilitated, finally, the PVC resin raw material is screened layer by layer through the opening plate, impacted into powder, and then the hot air is upwards sent, so that the accumulation in the drying tower is reduced, and long-time accumulation and high temperature of the PVC resin raw material are prevented; impurities are produced.
The adjusting valve is arranged to adjust the air outlet rate of hot air, so that the hot air quantity in the drying tower is adjusted through the change of the air quantity, and the drying uniformity of PVC materials in the drying tower is further improved.
The invention has the beneficial effects that: the high quality rate of the products is improved, the impurities are reduced, and the equipment modification cost is low.
Drawings
FIG. 1 is a schematic diagram of a drying tower according to the present invention;
list of reference numerals:
wherein 1-a drying tower; 2-branch bins; 3-a hot air port; 4-a discharge hole; a 5-cyclone separator; 6-opening plate; 7-a regulating valve; 8-manhole; 9-a total hot air blower; 10-a hot air pipe; 11-a feed inlet.
Detailed Description
The present invention is further illustrated in the following drawings and detailed description, which are to be understood as being merely illustrative of the invention and not limiting the scope of the invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
The treatment process for reducing impurity particles in the PVC resin production process of the embodiment comprises the following steps,
step 1: pre-drying PVC resin powder; the drying temperature of the step 1 is 100 ℃; and (5) sending the mixture into an oven for pre-drying for 30-60 minutes.
Step 2: the PVC resin is sent into a drying tower for drying; the temperature in the drying tower in the step 3 is 130-145 ℃. The bottom of the drying tower 1 is provided with two branch bins 2; the connection between each branch bin 2 is an arc transition surface; a hot air port 3 is arranged on each branch bin 2; the two ends of the total hot air blower 9 are respectively connected with a hot air pipe 10; one end of the hot air pipe 10 is connected with the hot air port 3; wherein the top of the drying tower 1 is connected with a cyclone separator 5 through a discharge port 4; wherein a plurality of perforated plates 6 are sequentially arranged above each hot air port 3; wherein the feed inlet 11 is positioned above the perforated plate 6; wherein the size of the perforated plate 6 is sequentially reduced from top to bottom; each hot air port 3 is provided with a regulating valve 7; and a manhole 8 is arranged on the branch bin 2.
According to the embodiment, hot air is conveyed into the drying tower through the hot air pipe by the total hot air blower, the pre-dried PVC resin raw material is conveyed into the drying tower, the hot air is dried and conveyed into the cyclone separator through the discharge hole for winnowing and collection, and as the drying tower is internally provided with 2 hot air pipes, when the PVC resin material is winnowed upwards along with the hot air, the materials with a part of particles which are heavy and clustered together can fall on the perforated plate conveniently, and the falling materials can be prevented from being clustered together by arranging the 2 hot air pipes, so that the distribution is convenient, finally, the PVC resin material is screened layer by layer through the perforated plate and impacted into powder, and then conveyed upwards through the hot air, so that the accumulation of the PVC resin material in the drying tower is reduced, and long-time accumulation and high temperature of the PVC resin material are prevented; impurities are produced.
The adjusting valve is arranged to adjust the air outlet rate of hot air, so that the hot air quantity in the drying tower is adjusted through the change of the air quantity, and the drying uniformity of PVC materials in the drying tower is further improved.
Step 3: the PVC resin after drying is selected and sent into a drying bed through a separator; the temperature in the drying tower bed in the step 3 is 130-145 ℃; the periphery of the drying bed has no dead angle.
Step 4: screening the dried materials by a cyclone separator and then sending the screened materials into a vibrating screen; the vibrating screen is a multilayer vibrating screen
Step 5: falls into the discharging bin through the vibrating screen.
By the process of the embodiment, compared with the prior art, the impurity content is obviously reduced, and the purity of the PVC resin is 99.98 percent
The technical means disclosed by the scheme of the invention is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features.
Claims (9)
- A treatment process for reducing impurity particles in the production process of PVC resin is characterized by comprising the following steps: comprises the steps of,step 1: pre-drying PVC resin powder;step 2: the PVC resin is sent into a drying tower for drying;step 3: the PVC resin after drying is selected and sent into a drying bed through a separator;step 4: screening the dried materials by a cyclone separator and then sending the screened materials into a vibrating screen;step 5: falls into the discharging bin through the vibrating screen.
- 2. The process for reducing impurity particles in the production process of PVC resin according to claim 1, wherein: the drying bed adopts a cyclone drying bed.
- 3. The process for reducing impurity particles in the production process of PVC resin according to claim 1, wherein: the drying temperature of the step 1 is 100-120 ℃.
- 4. The process for reducing impurity particles in the production process of PVC resin according to claim 1, wherein: the temperature in the drying bed in the step 3 is 130-145 ℃.
- 5. The process for reducing impurity particles in the production process of PVC resin according to claim 1, wherein: the bottom of the drying tower (1) is provided with two branch bins (2); the connection between each branch bin (2) is an arc transition surface; a hot air port (3) is arranged on each branch bin (2); two ends of the total hot air blower (9) are respectively connected with a hot air pipe (10); one end of the hot air pipe (10) is connected with the hot air port (3); wherein the top of the drying tower (1) is connected with a cyclone separator (5) through a discharge hole (4); wherein a plurality of perforated plates (6) are sequentially arranged above each hot air port (3); wherein the feed inlet (11) is positioned above the perforated plate (6); wherein the size of the opening plate (6) is sequentially reduced from top to bottom; each hot air port (3) is provided with a regulating valve (7).
- 6. The process for reducing foreign particles in a PVC resin production process according to claim 5, wherein: and a manhole (8) is arranged on the branch bin (2).
- 7. The process for reducing impurity particles in the production process of PVC resin according to claim 1, wherein: the periphery of the drying bed has no dead angle.
- 8. The process for reducing impurity particles in the production process of PVC resin according to claim 1, wherein: the vibrating screen is a multilayer vibrating screen.
- 9. The process for reducing impurity particles in the production process of PVC resin according to claim 1, wherein: the drying in the step 1 comprises the steps of feeding the materials into an oven for pre-drying for 30-60 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211518942.XA CN116079942A (en) | 2022-11-30 | 2022-11-30 | Treatment process for reducing impurity particles in PVC resin production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211518942.XA CN116079942A (en) | 2022-11-30 | 2022-11-30 | Treatment process for reducing impurity particles in PVC resin production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116079942A true CN116079942A (en) | 2023-05-09 |
Family
ID=86201494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211518942.XA Pending CN116079942A (en) | 2022-11-30 | 2022-11-30 | Treatment process for reducing impurity particles in PVC resin production process |
Country Status (1)
| Country | Link |
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| CN (1) | CN116079942A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1196154A (en) * | 1966-08-31 | 1970-06-24 | Sermia Soc D Etudes Et De Rech | Improvements in or relating to a Drying Apparatus for Granular Products |
| JPH05231772A (en) * | 1991-09-06 | 1993-09-07 | Iseki & Co Ltd | Device for preventing straw dust accumulation in grain drying machine |
| CN204822743U (en) * | 2015-07-23 | 2015-12-02 | 云南金色大地科技发展有限公司 | Special feed bin is stored to seed |
| CN107449264A (en) * | 2017-09-15 | 2017-12-08 | 四川宏图普新微波科技有限公司 | A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying system and method |
| CN208588170U (en) * | 2018-07-27 | 2019-03-08 | 河南神马氯碱发展有限责任公司 | PVC drying tower |
| CN214371310U (en) * | 2021-03-02 | 2021-10-08 | 合肥铭盛制药有限公司 | Energy-saving environment-friendly efficient boiling dryer for producing Yidan tablets |
-
2022
- 2022-11-30 CN CN202211518942.XA patent/CN116079942A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1196154A (en) * | 1966-08-31 | 1970-06-24 | Sermia Soc D Etudes Et De Rech | Improvements in or relating to a Drying Apparatus for Granular Products |
| JPH05231772A (en) * | 1991-09-06 | 1993-09-07 | Iseki & Co Ltd | Device for preventing straw dust accumulation in grain drying machine |
| CN204822743U (en) * | 2015-07-23 | 2015-12-02 | 云南金色大地科技发展有限公司 | Special feed bin is stored to seed |
| CN107449264A (en) * | 2017-09-15 | 2017-12-08 | 四川宏图普新微波科技有限公司 | A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying system and method |
| CN208588170U (en) * | 2018-07-27 | 2019-03-08 | 河南神马氯碱发展有限责任公司 | PVC drying tower |
| CN214371310U (en) * | 2021-03-02 | 2021-10-08 | 合肥铭盛制药有限公司 | Energy-saving environment-friendly efficient boiling dryer for producing Yidan tablets |
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