CN1974613A - Desolventizing apparatus for chlorinating solution of chlorinated polyvinyl chloride - Google Patents
Desolventizing apparatus for chlorinating solution of chlorinated polyvinyl chloride Download PDFInfo
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- CN1974613A CN1974613A CN 200610147342 CN200610147342A CN1974613A CN 1974613 A CN1974613 A CN 1974613A CN 200610147342 CN200610147342 CN 200610147342 CN 200610147342 A CN200610147342 A CN 200610147342A CN 1974613 A CN1974613 A CN 1974613A
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- vaporizer
- polyvinyl chloride
- desolventizing
- chlorinated polyvinyl
- solvent
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Abstract
The present invention discloses desolventizing apparatus for chlorinating solution of chlorinated polyvinyl chloride, and belongs to the field of polymer solution desolventizing technology. The desolventizing apparatus includes an atomizer, a gasifier, a stripping chamber, connecting pipes and a U-shaped liquid seal material outlet. The apparatus of the present invention eliminate most of the solvent from the chlorinating solution, and has low solvent consumption, less pollution to atmosphere, high atomizing effect, high desolventizing efficiency, simple structure and easy operation.
Description
Technical field
The present invention relates to a kind of from macromolecular solution the device of the desolventizing of Desolventizing apparatus, particularly a kind of chlorinated polyvinyl chloride chloride solution, be used for the macromolecular material production field.
Background technology
It all is polyvinyl chloride resin to be dissolved in carry out chlorating in the solvent that solvent method is produced chlorinated polyvinyl chloride resin, used solvent is chlorobenzene or the mixed solvent be made up of the lower boiling halohydrocarbon, and the chlorated liquid that obtains after the chlorination reaction need remove solvent and obtain the chlorinated polyvinyl chloride resin product.Present reported chlorated liquid removes solvent device two kinds: a kind of is to adopt the elutriation tower, as Yao Jinyu at " produce about supervinyi chloride resin in elutriation problem inquire into " (polyvinyl chloride, 1997, (5), 27-31) with the Desolventizing apparatus described in the USSR (Union of Soviet Socialist Republics) patent SU 1082792, its principal character is: three elutriation tower shared vaporizers in parallel, and two passage exterior mixing airflow atomizing nozzles are adopted in the chlorated liquid atomizing, and this device adopts the continous way operation.Second kind is adopted the elutriation still, and as the Desolventizing apparatus that German patent DE 4237148 is introduced, its principal character is: the elutriation still is a still formula container that has stirring, and this device can only adopt batch operation.On existing literature, when adopting the elutriation tower apparatus to remove solvent, a large amount of solvents that remove from chlorated liquid are dissolved in the hot water again, residual solvent is more in effusive hot water and the resin from the elutriation tower, when liquid-solid separation, solvent evaporates in a large number, causes the high and serious atmosphere polluting problem of solvent unit consumption; And when adopting the elutriation kettle device, resin particle bonds mutually during solvent removal, easily forms the bulk resin and occluding device.
Summary of the invention
The present invention is directed to the deficiencies in the prior art and defective, a kind of Desolventizing apparatus of chlorinated polyvinyl chloride chloride solution efficiently is provided, can reduce the solvent unit consumption, alleviate solvent atmospheric pollution.
Technical scheme:
The present invention is achieved through the following technical solutions: a kind of Desolventizing apparatus of chlorinated polyvinyl chloride chloride solution, it is characterized in that, described Desolventizing apparatus comprises: the spraying gun 1 of vaporizer 2 and portion mounted thereto, the top of vaporizer 2 is provided with a steam outlet pipe 7, the bottom is provided with hot water inlet pipe 6, inner side-wall around vaporizer 2 is equipped with shower 8, one end of stripping chamber 4 links to each other with vaporizer 2 by pipe connecting 3, the other end is connected with U type fluid-tight discharge port 5, and a stripping vapour pipe 9 runs through the bottom that is installed in vaporizer 2 and stripping chamber 4.
Described spraying gun 1 is a Y type air-blast atomization nozzle.
Be uniform-distribution with the spray apertures of φ 1-3mm on the described shower 8, pitch of holes is 50mm.
On the described stripping vapour pipe 9 every interval 50mm along caliber to the steam hole of opening two φ 1-3mm.
In chlorated liquid spraying desolventizing process, chlorated liquid and water vapor mix the back atomizing in spraying gun, and droplet directly sprays into the gas-phase space of vaporizer, and most of solvent is removed in vaporizer, the solidified chlorinated polyvinyl chloride resin of formation.The cured resin that the hot water that feeds from vaporizer bottom hot water inlet pipe will fall into hot water is taken vaporizer out of and is entered the stripping chamber, the water vapor of stripped vapor pipe ejection carries out the cross-flow stripping to the hot water that has carried resin, further remove the solvent of the remnants in hot water and the resin, effusive hot water forms liquid film in the spray apertures of vaporizer inner side-wall shower on the vaporizer wall, prevents that resin from sticking on the vaporizer wall.U type fluid-tight discharge port can prevent that vaporizer and the indoor steam of stripping from flowing out from discharge port.The solvent vapo(u)r that produces behind spraying and cross-flow stripping and the mixture of water vapor flow out from the vaporizer steam outlet pipe, after the condenser condenses of postorder,, flow out the entrained resin of hot water through U type fluid-tight discharge port and in postorder equipment, carry out obtaining product after solid-liquid separation, the drying to reclaim solvent.
Beneficial effect
The used spraying gun of apparatus of the present invention can make full-bodied chlorated liquid form good atomizing, and the Sauter mean diameter of the cured resin particles of formation (SMD) is between 70～250 μ m; Apparatus of the present invention can make the most solvents in the chlorated liquid remove in vaporizer, enter resin carry in the agent hot water quantity of solvent seldom, greatly reduced the solvent evaporates amount in the postorder solid-liquid separation process, both reduced the solvent unit consumption greatly, alleviated solvent again atmospheric pollution; In addition, the anti-blocking performance of device of the present invention is good, and the situation because of resin caking occluding device can not take place during the continous way operation.Therefore the present invention has important techniques meaning and economic implications for the desolventizing of chlorinated polyvinyl chloride chloride solution.
Description of drawings
Fig. 1 device synoptic diagram of the present invention
The 1-spraying gun, 2-vaporizer, 3-pipe connecting, 4-stripping chamber, 5-U type fluid-tight discharge port, 6-hot water inlet pipe, 7-steam outlet pipe, 8-shower, 9-stripped vapor pipe, the import of 10-stripped vapor import 11-spray water.
Embodiment
As shown in Figure 1, the present invention includes: comprising: spraying gun (1), vaporizer (2), pipe connecting (3), stripping chamber (4), U type fluid-tight discharge port (5), hot water inlet pipe (6) is arranged at vaporizer (2) bottom, steam outlet pipe (7) is arranged at the vaporizer top, the vaporizer inner side-wall is equipped with shower (8), one end of stripping chamber (4) is connected with vaporizer (2) by pipe connecting (3), the other end of stripping chamber (4) is connected with U type fluid-tight discharge port (5), and vaporizer (2) and stripping chamber (4) bottom are equipped with stripped vapor pipe (9).Spraying gun adopts internal mixing type atomizer, be uniform-distribution with the spray apertures of φ 1-3mm on the shower, pitch of holes is 50mm, the end that vapour is caught the chamber is connected with vaporizer by pipe connecting, the other end of stripping chamber is connected with U type fluid-tight discharge port, vaporizer and stripping chamber bottom is equipped with the stripped vapor pipe, on the stripped vapor pipe every interval 50mm along caliber to the steam hole of opening two φ 1-3mm.
Embodiment 1
The chlorinated polyvinyl chloride chloride solution that contains chlorobenzene 85wt%, after spraying gun 1 atomizing, droplet sprays into vaporizer 2, and most of solvent is removed in vaporizer, chlorobenzene in the chlorated liquid droplet of atomizing is evaporation in a large number in the vaporizer gas phase, the cured resin particles of formation.The cured resin that the hot water that feeds from vaporizer 2 bottom hot water inlet pipes 6 will fall into hot water is taken vaporizer 2 out of and is entered stripping chamber 4, the water vapor of stripped vapor pipe 9 ejections carries out the cross-flow stripping to the hot water that has carried resin, further removes the solvent of the remnants in hot water and the resin.The solvent vapo(u)r that produces behind spraying and cross-flow stripping and the mixture of water vapor flow out from vaporizer steam outlet pipe 7, after the condenser condenses of postorder,, flow out the entrained resin of hot water through U type fluid-tight discharge port 5 and in postorder equipment, carry out obtaining product after solid-liquid separation, the drying to reclaim solvent.Through gas Chromatographic Determination, chlorobenzene content is 2.0wt% from the effusive resin of discharge port, and chlorobenzene content is 12.8mg/L in the hot water, and chlorobenzene content is 161mg/m in the gas phase of discharge port top
3
Claims (4)
1, a kind of Desolventizing apparatus of chlorinated polyvinyl chloride chloride solution, it is characterized in that, described Desolventizing apparatus comprises: the spraying gun (1) of vaporizer (2) and portion mounted thereto, the top of vaporizer (2) is provided with a steam outlet pipe (7), the bottom is provided with hot water inlet pipe (6), inner side-wall around vaporizer (2) is equipped with shower (8), one end of stripping chamber (4) links to each other with vaporizer (2) by pipe connecting (3), the other end is connected with U type fluid-tight discharge port (5), and a stripping vapour pipe (9) runs through the bottom that is installed in vaporizer (2) and stripping chamber 4.
2, the Desolventizing apparatus of chlorinated polyvinyl chloride chloride solution as claimed in claim 1 is characterized in that, described spraying gun (1) is a Y type air-blast atomization nozzle.
3, the Desolventizing apparatus of chlorinated polyvinyl chloride chloride solution as claimed in claim 1 is characterized in that, is uniform-distribution with the spray apertures of φ 1-3mm on the described shower (8), and pitch of holes is 50mm.
4, the Desolventizing apparatus of chlorinated polyvinyl chloride chloride solution as claimed in claim 1 is characterized in that, described stripping vapour pipe (9) go up every interval 50mm along caliber to the steam hole of opening two φ 1-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610147342 CN1974613A (en) | 2006-12-15 | 2006-12-15 | Desolventizing apparatus for chlorinating solution of chlorinated polyvinyl chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610147342 CN1974613A (en) | 2006-12-15 | 2006-12-15 | Desolventizing apparatus for chlorinating solution of chlorinated polyvinyl chloride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1974613A true CN1974613A (en) | 2007-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610147342 Pending CN1974613A (en) | 2006-12-15 | 2006-12-15 | Desolventizing apparatus for chlorinating solution of chlorinated polyvinyl chloride |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109369829A (en) * | 2018-10-26 | 2019-02-22 | 山东高信化学股份有限公司 | The injection molding preparation method of high-performance chlorinated polyvinyl chloride |
-
2006
- 2006-12-15 CN CN 200610147342 patent/CN1974613A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109369829A (en) * | 2018-10-26 | 2019-02-22 | 山东高信化学股份有限公司 | The injection molding preparation method of high-performance chlorinated polyvinyl chloride |
| CN109369829B (en) * | 2018-10-26 | 2021-04-13 | 山东高信化学股份有限公司 | Preparation method of high-performance chlorinated polyvinyl chloride for injection molding |
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