CN205382111U - System of getting rid of of impurity in benzene solution - Google Patents
System of getting rid of of impurity in benzene solution Download PDFInfo
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- CN205382111U CN205382111U CN201521105836.4U CN201521105836U CN205382111U CN 205382111 U CN205382111 U CN 205382111U CN 201521105836 U CN201521105836 U CN 201521105836U CN 205382111 U CN205382111 U CN 205382111U
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Abstract
The utility model relates to a system of getting rid of of impurity in benzene solution, including blender (1), separator (2), treating column (3), wherein blender (1) enters the mouth and is used for the outflow even have between treating column (3) export of benzene solution pump (4), blender (1) the export with separator (2) entry linkage, the rare alkali liquor tube line of entry linkage of pump (4) gets into pipeline (15) of pump, this pipe connection rare alkali liquor tube line (5) and desalinized water pipeline (6), rare alkali liquor tube line (5) are parallelly connected with desalinized water pipeline (6). The utility model discloses an impurity in the benzene solution can high -efficient be got rid of by the system, ensures that impurity contents such as methyl alcohol in the metaformaldehyde, formaldehyde are stable to accord with technology technical requirement.
Description
Technical field
This utility model relates to feed separation technical field, is specifically related in benzole soln, especially metaformaldehyde benzole soln the removal system of the impurity such as formaldehyde, methanol.
Background technology
In metaformaldehyde preparation technology of the prior art, in metaformaldehyde, formaldehyde, methanol content are always unstable, and formaldehyde, methanol content exceed standard seriously, cause that metaformaldehyde is polymerized, and polyformaldehyde grinding, end-blocking, granulation zone are frequently occluded, it is impossible to produce continuously.As shown in Figure 1, original process is: be provided with the blender 1 of DN100 × 800 before equipment static separation device 2, sig water horizontally enters into blender 1 respectively with the benzole soln containing metaformaldehyde, through blender 1 mix laggard enter static separator 2, by simple mixing, separating effect is not good, it is difficult to remove the impurity such as the methanol in benzole soln, formaldehyde.Cause following production predicament:
1, dilute alkaline soln and benzole soln can not be sufficiently mixed, and the clearance such as methanol, formaldehyde is low, the contaminant overstandard such as methanol, formaldehyde in metaformaldehyde.
2, the frequent returning charge of metaformaldehyde off quality is refined again to treating column 3, and the tower that causes gently boiling, reboiling tower power consumption are double, add production cost.
3, metaformaldehyde solution quality is defective, and frequent returning charge is processed again, it is impossible to produce continuously, and device load cannot be mentioned, and less than the 10% of design load, causes that device production efficiency is low, cost 11000 yuan/ton.
Utility model content
For the problem solving existing process, this utility model provides in a kind of benzole soln, the especially removal system of impurity in metaformaldehyde benzole soln, including blender 1, separator 2, treating column 3, wherein said blender 1 entrance and the treating column 3 for flowing out described benzole soln are connected with pump 4 between exporting, and the outlet of described blender 1 is connected with described separator 2 entrance；
The entrance of described pump 4 connects sig water pipeline and enters the pipeline 15 of pump, and this pipeline connects sig water pipeline 5 and desalted water pipeline 6, and described sig water pipeline 5 is in parallel with desalted water pipeline 6.
Preferably, described benzole soln is metaformaldehyde benzole soln.
Preferably, described desalted water pipeline 6 arranges adjustment valve 7.
Preferably, described sig water pipeline enters and arranges alkali liquor dilution mixture device 8 on the pipeline 15 of pump.
Preferably, the pipeline 15 of described sig water pipeline entrance pump is vertical with the entrance of described pump 4 is connected.
Preferably, the nominal diameter of the pipeline 15 that described sig water pipeline enters pump is 40mm.
Preferably, the entrance pipeline 14 connecting the blender between described blender 1 entrance and pump 4 is 150 meters.
The removal system of impurity in the benzole soln that this utility model provides, it is removed technique processing method and realizes the materials such as the formic acid in effective removal benzole soln, formaldehyde mainly through following four steps:
(1) increase of desalted water pipeline devises adjustment valve group 7, and sig water pipeline increase devises blender 8, makes sig water and the accurate proportioning of desalted water, after being sufficiently mixed, enters back into pump intake.
(2) sodium hydroxide sig water is added by mixer entrance level, change into and vertically being added by pump intake, benzole soln is formed shear action by the dilute alkaline soln added, pump has also functioned to the effect of stirring and evenly mixing, two kinds of liquid blend at pipe-line blending under the promotion of shear force, make fully reaction such as dilute alkaline soln and the formic acid in benzole soln, low molecule paraformaldehyde, formaldehyde etc. in pipeline.
(3) process of this utility model system also overstriking dilute alkaline soln enters pump intake pipeline, the pipeline that pipeline technological transformation is 40mm of nominal diameter 25mm, makes dilute alkaline soln normalization, is more beneficial for producing stable operation.
(4) the 150 mitron roads (dilute alkaline soln mixes with benzole soln) entering blender serve the effect of pipeline reactor, effectively eliminate the materials such as the formic acid in benzole soln, formaldehyde.Dilute alkaline soln and benzole soln can be sufficiently mixed, make the impurity in the benzole soln containing metaformaldehyde be dissolved into greatest extent in sig water, fully decomposed by sig water, dissolve, finally taken away by aqueous phase, guaranteeing that metaformaldehyde steady quality is qualified, process units runs continuously.
The removal system of impurity in the metaformaldehyde benzole soln that this utility model provides, compared with the process unit before improving, has the advantage that
1, devising adjustment valve group 7 in desalted water pipeline increase, sig water pipeline increase devises blender 8, it is achieved that the accurate proportioning of dilute alkaline soln, improves controllability and the promptness of operation.
2, being added from pump discharge level by dilute alkaline soln, technological transformation is for vertically to add from pump intake.Many-sided multi-angle improves the mixed effect of dilute alkaline soln and benzole soln, has been finally reached the target of reaction, extraction, separation.
3, overstriking dilute alkaline soln pipeline, by the pipeline that pipeline technological transformation is 40mm of nominal diameter 25mm, has reached the purpose of dilute alkaline soln normalization.
4, sig water and benzole soln are sufficiently mixed by blender, and the clearance such as methanol, formaldehyde is high, and in metaformaldehyde, the Control of Impurities such as methanol, formaldehyde is within the scope of technic index, i.e. metaformaldehyde quality standard: formaldehyde≤50ppm, methanol≤25ppm.
5, metaformaldehyde is up-to-standard, it is not necessary to before returning, workshop section's treating column is refined again, and the production continuously for device provides sufficient principal monomer, reaches device design load more than 85%, reduces production cost.
Accompanying drawing explanation
Fig. 1 represents original technical matters device schematic diagram.
Fig. 2 represents the schematic diagram of the removal system of impurity in metaformaldehyde benzole soln of the present utility model.
Accompanying drawing labelling:
1-blender M-248；
2-separator V-248；
3-treating column T-233；
4-pump P-233A/B；
5-sig water adds pipeline；
6-desalted water pipeline；
7-regulates valve；
8-technological transformation increases alkali liquor dilution mixture device newly；
9-extraction tower；
10-aqueous phase pipeline；
The 11-benzene phase solution line containing metaformaldehyde；
12-metaformaldehyde；
13-benzene phase；
The entrance pipeline of 14-blender 1；
15-sig water pipeline enters the pipeline of pump 4.
Detailed description of the invention
Following example are only and schematically illustrate content of the present utility model, are not limited to protection domain of the present utility model.
Embodiment
As shown in Figure 2, the removal system of impurity in a kind of metaformaldehyde benzole soln, including blender 1, separator 2, treating column 3, wherein said blender 1 entrance and the treating column 3 for flowing out described benzole soln are connected with pump 4 between exporting, and the outlet of described blender 1 is connected with described separator 2 entrance；The entrance of described pump 4 connects sig water pipeline and enters the pipeline 15 of pump, and this pipeline connects sig water pipeline 5 and desalted water pipeline 6, and described sig water pipeline 5 is in parallel with desalted water pipeline 6.
Described desalted water pipeline 6 arranges one group and regulates valve 7.Described sig water pipeline enters and is provided with an alkali liquor dilution mixture device 8 on the pipeline 15 of pump, makes sig water and the accurate proportioning of desalted water, after being sufficiently mixed, enters back into pump 4 entrance.The pipeline 15 of described sig water pipeline entrance pump is vertical with the entrance of described pump 4 to be connected to be added thus benzole soln is produced shear action sodium hydroxide sig water by pump 4 entrance is vertical, and pump 4 also has the effect of stirring and evenly mixing.
Described metaformaldehyde benzole soln flows into blender 1 from treating column 3 through pump 4.
The nominal diameter overstriking of the pipeline 15 that described sig water pipeline enters pump makes dilute alkaline soln normalization to 40mm, is more beneficial for producing stable operation.The pipeline 14 that enters of the blender of 150 meters of entrance blender 1 serves the effect of pipeline reactor, effectively removes the material such as formic acid, formaldehyde in benzole soln.
The mensuration of metaformaldehyde product quality:
It is embodied as being proposed a plan by Shenhua Ningxia polyformaldehyde factory of Coal Industry Group coal chemical industry branch company, the many petrochemical industry project company limiteies in Shanghai are entrusted to complete layout design, constructing and completed by Shenhua Ningxia safety check company of Coal Industry Group coal chemical industry branch company, the acceptance of work is organized and implemented by machine power portion of Ningxia Coal Industry Group coal chemical industry branch company of Shenhua.
As shown in table 2 below, wherein methanol content detection adopts chromatography, each sample introduction 1 microlitre, and content of formaldehyde detection adopts spectrophotometer method, and sampling is diluted to 50 milliliters as required.
The production effect reached:
Foregoing invention implementation achievement: metaformaldehyde solution quality has reached technological design index, and device load is increased to more than 85%, ensure that production continuous and steady operation for a long time.
The quality of the metaformaldehyde product that the process of employing Fig. 1 device produces before table 1 invention:
The quality of the metaformaldehyde product that the process of table 2 this utility model structure produces:
Be can be seen that by upper table 1 and table 2, apply in metaformaldehyde benzole soln of the present utility model before the removal system of impurity, methanol in metaformaldehyde solution, formaldehyde are serious, and impurity content is unstable, applying in metaformaldehyde benzole soln of the present utility model after the removal system of impurity, in metaformaldehyde solution, formaldehyde, methanol content meet technological requirement and steady quality, meet polyformaldehyde device production at high load ability, for the technical guarantee that the stable operation offer of device is solid.
Claims (7)
1. the removal system of impurity in a benzole soln, it is characterized in that, including blender (1), separator (2), treating column (3), wherein said blender (1) entrance and the treating column (3) for flowing out described benzole soln are connected with pump (4) between exporting, and described blender (1) outlet is connected with described separator (2) entrance；
The entrance of described pump (4) connects sig water pipeline and enters the pipeline (15) of pump, this pipeline connects sig water pipeline (5) and desalted water pipeline (6), and described sig water pipeline (5) is in parallel with desalted water pipeline (6).
2. the removal system of impurity in benzole soln according to claim 1, it is characterised in that described benzole soln is metaformaldehyde benzole soln.
3. the removal system of impurity in benzole soln according to claim 1, it is characterised in that adjustment valve (7) is set on described desalted water pipeline (6).
4. the removal system of impurity in the benzole soln according to any one of claim 1-3, it is characterised in that described sig water pipeline enters and arranges alkali liquor dilution mixture device (8) on the pipeline (15) of pump.
5. the removal system of impurity in benzole soln according to claim 4, it is characterised in that the pipeline (15) of described sig water pipeline entrance pump is vertical with the entrance of described pump (4) to be connected.
6. the removal system of impurity in benzole soln according to claim 5, it is characterised in that the nominal diameter of the pipeline (15) that described sig water pipeline enters pump is 40mm.
7. the removal system of impurity in the benzole soln according to claim 1-3 or any one of 5-6, it is characterised in that
The entrance pipeline (14) connecting the blender between described blender (1) entrance and pump (4) is 150 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521105836.4U CN205382111U (en) | 2015-12-25 | 2015-12-25 | System of getting rid of of impurity in benzene solution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521105836.4U CN205382111U (en) | 2015-12-25 | 2015-12-25 | System of getting rid of of impurity in benzene solution |
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| Publication Number | Publication Date |
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| CN205382111U true CN205382111U (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521105836.4U Active CN205382111U (en) | 2015-12-25 | 2015-12-25 | System of getting rid of of impurity in benzene solution |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107382955A (en) * | 2017-08-24 | 2017-11-24 | 开封龙宇化工有限公司 | A kind of benzene recovery device for steam in metaformaldehyde production process |
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2015
- 2015-12-25 CN CN201521105836.4U patent/CN205382111U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107382955A (en) * | 2017-08-24 | 2017-11-24 | 开封龙宇化工有限公司 | A kind of benzene recovery device for steam in metaformaldehyde production process |
| CN107382955B (en) * | 2017-08-24 | 2023-06-16 | 开封龙宇化工有限公司 | Benzene vapour recovery unit in trioxymethylene production process |
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| GR01 | Patent grant |