CN203686582U - Conveying device for preparing hydrogenation working section dimethyl oxalate in glycol with synthesis gas - Google Patents
Conveying device for preparing hydrogenation working section dimethyl oxalate in glycol with synthesis gas Download PDFInfo
- Publication number
- CN203686582U CN203686582U CN201320872613.5U CN201320872613U CN203686582U CN 203686582 U CN203686582 U CN 203686582U CN 201320872613 U CN201320872613 U CN 201320872613U CN 203686582 U CN203686582 U CN 203686582U
- Authority
- CN
- China
- Prior art keywords
- dimethyl oxalate
- pipeline
- feed pump
- valve
- solution feed
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model provides a conveying device for preparing hydrogenation working section dimethyl oxalate in glycol with synthesis gas. The conveying device comprises a dimethyl oxalate storage tank and an evaporating tank, wherein a material outlet of the storage tank is connected with a liquid inlet of the evaporating tank via a liquid supply pump, and the liquid inlet of the evaporating tank is connected with a material outlet of a methanol tank via a pipeline. According to the conveying device, methanol is connected into the evaporating tank of a hydrogenation working section, so that blocking of pipelines and the liquid supply pump caused by crystallization of dimethyl oxalate can be avoided when an adjoining pipe steam blind spot exists, the problem of incapable second restart of the liquid supply pump is solved, a reaction is normal, and the production cost is lowered.
Description
Technical field
The utility model relates to synthetic technology of ethylene glycol field, is specifically related to the feedway that a kind of synthetic gas is prepared hydrogenation workshop section dimethyl oxalate in ethylene glycol.
Background technique
Ethylene glycol is a kind of important Organic Chemicals, and traditional ethylene glycol production method is to walk petrochemical industry route, obtains ethene by petroleum processing, uses silver catalyst that ethylene is generated to ethylene oxide, then by ethylene oxide hydration generating glycol.
Along with the day by day shortage of world petroleum resource, and the few Energy Situation of China's coal heavy wool, existing adopt prepared this technique of ethylene glycol with producing synthesis gas from coal and dimethyl oxalate (DMO) hydrogenation reaction more.Because dimethyl oxalate is colourless monoclinic crystal, be solid at normal temperatures, fusing point is 57 DEG C, need aborning to be formed liquid mobile in pipeline, now how dimethyl oxalate is dissolved in methyl alcohol and forms the methanol solution that mass percent is 10-50%, its methanol usage is larger, and the reaction later stage also relates to the recycling of dimethyl oxalate and methyl alcohol, increase equipment, and can cause the waste of cost increase and raw material.
The main adjoining pipe steam that adopts prevents that dimethyl oxalate from solidifying in pipeline at present, and it is liquid making it in pipeline.But also can there is blind spot in adjoining pipe steam, or occur improper accident as adjoining pipe quits work, production system is while stopping, the dimethyl oxalate in process pipelines can solidify and spread rapidly, and causes the accident that some equipment cannot restarting.
Model utility content
In order to overcome problems of the prior art, the utility model provides synthetic gas to prepare the feedway of hydrogenation workshop section dimethyl oxalate in ethylene glycol, prevents dimethyl oxalate blocking pipeline and the pump housing.
For achieving the above object, the utility model has adopted following technological scheme: synthetic gas is prepared the feedway of hydrogenation workshop section dimethyl oxalate in ethylene glycol, comprise basin and the evaporating pot of dimethyl oxalate, the discharge port of described basin is connected with the liquid entering hole of evaporating pot by solution feed pump, and the liquid entering hole of described evaporating pot is connected by pipeline with the discharge port of methanol tank.
Further, the pipeline between discharge port and the solution feed pump of described basin is provided with the first valve, and the discharge port of described methanol tank is connected on the pipeline between described the first valve and solution feed pump, and the mouth of pipe place of the discharge nozzle of methanol tank is provided with the second valve; Pipeline between described solution feed pump and the liquid entering hole of evaporating pot is provided with the 3rd valve.
The utility model passes into methyl alcohol in the evaporating pot of hydrogenation workshop section, before synthetic reaction driving work and while parking, passes into methyl alcohol, is used for preventing dimethyl oxalate blocking pipeline or equipment.Production system is first opened the second valve and the 3rd valve before driving, and by solution feed pump, the methyl alcohol in a certain amount of methanol tank is transported to evaporating pot, and pipeline and solution feed pump are cleaned; Open again the first valve, in basin, dimethyl oxalate liquid is sent in evaporating pot by solution feed pump, control the liquid level of evaporating pot in 40-60% left and right, pass into hydrogen simultaneously and carry out vaporization cycle, finally dimethyl oxalate gas is passed in hydrogenator together with hydrogen, under the effect of catalyzer, react generating glycol.After evaporation finishes, close the first valve; Open again second valve door and by solution feed pump, the methyl alcohol in a certain amount of methanol tank is transported in evaporating pot, dimethyl oxalate remaining in pipeline and solution feed pump is flushed in evaporating pot, to prevent the object of dimethyl oxalate blocking pipeline or equipment.
The beneficial effects of the utility model have:
1, the utility model is at the evaporating pot access methyl alcohol of hydrogenation workshop section, in the time having the blind spot of adjoining pipe steam or improper accident occurs, can prevent that dimethyl oxalate Crystallization Plugging pipeline and relevant device are as solution feed pump, and then the problem of having avoided solution feed pump can not secondary to restart.
2, the utility model utilizes a solution feed pump for delivery of dimethyl oxalate and methyl alcohol, saving equipment and pipeline, thus reduce cost of production.
3,, in the time of orderly shutdown, can utilize washed with methanol to rest on the dimethyl oxalate in pipeline and the solution feed pump pump between the first valve and evaporating pot, thereby reach the object that prevents dimethyl oxalate Crystallization Plugging pipeline and the pump housing.
4, in the time that solution feed pump need to overhaul, first clean solution feed pump with methyl alcohol, the dimethyl oxalate in pipeline and the pump housing is transported in evaporating pot, make the outer row of material, reach environmental protection, economize in raw materials.
Brief description of the drawings
Fig. 1 is the utility model structural representation;
In figure: 1-methanol tank, 2-basin, 3-solution feed pump, 4-evaporating pot, 5-1 the first valve, 5-2 the second valve, 5-3 the 3rd valve.
Embodiment
As shown in Figure 1, synthetic gas is prepared the feedway of hydrogenation workshop section dimethyl oxalate in ethylene glycol, comprise the basin 2 and evaporating pot 4 of dimethyl oxalate, the discharge port of described basin 2 is connected with the liquid entering hole of evaporating pot 4 by solution feed pump 3, and the liquid entering hole of described evaporating pot 4 is connected by pipeline with the discharge port of methanol tank 1.Pipeline between the discharge port of basin 2 and solution feed pump 3 is provided with the first valve 5-1, and the discharge port of described methanol tank 1 is connected on the pipeline between the first valve 5-1 and solution feed pump 3, and the mouth of pipe place of the discharge nozzle of methanol tank 1 is provided with the second valve 5-2; Pipeline between described solution feed pump 3 and the liquid entering hole of evaporating pot 4 is provided with the 3rd valve 5-3.
When production, first open the first valve 5-1, the 3rd valve 5-3, the interior dimethyl oxalate liquid of basin 2 is sent in evaporating pot 4 by solution feed pump 3, pass into hydrogen simultaneously and carry out vaporization cycle, finally dimethyl oxalate gas is passed in hydrogenator together with hydrogen, under the effect of catalyzer, react generating glycol.After evaporation finishes, close the first valve 5-1; Open again the second valve 5-2 and by solution feed pump 3, the methyl alcohol in methanol tank 1 is transported in evaporating pot 4, the dimethyl oxalate in pipeline and solution feed pump 3 is rinsed well, avoid dimethyl oxalate to stop up connecting line and solution feed pump 3.
Above embodiment is not limited only to protection domain of the present utility model, all modify based on basic thought of the present utility model or change all belong to protection domain of the present utility model.
Claims (2)
1. synthetic gas is prepared the feedway of hydrogenation workshop section dimethyl oxalate in ethylene glycol, comprise basin and the evaporating pot of dimethyl oxalate, it is characterized in that: the discharge port of described basin is connected with the liquid entering hole of evaporating pot by solution feed pump, the liquid entering hole of described evaporating pot is connected by pipeline with the discharge port of methanol tank.
2. synthetic gas according to claim 1 is prepared the feedway of hydrogenation workshop section dimethyl oxalate in ethylene glycol, it is characterized in that: the pipeline between discharge port and the solution feed pump of described basin is provided with the first valve, the discharge port of described methanol tank is connected on the pipeline between described the first valve and solution feed pump, and the mouth of pipe place of the discharge nozzle of methanol tank is provided with the second valve; Pipeline between described solution feed pump and the liquid entering hole of evaporating pot is provided with the 3rd valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320872613.5U CN203686582U (en) | 2013-12-27 | 2013-12-27 | Conveying device for preparing hydrogenation working section dimethyl oxalate in glycol with synthesis gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320872613.5U CN203686582U (en) | 2013-12-27 | 2013-12-27 | Conveying device for preparing hydrogenation working section dimethyl oxalate in glycol with synthesis gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203686582U true CN203686582U (en) | 2014-07-02 |
Family
ID=51008480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320872613.5U Expired - Fee Related CN203686582U (en) | 2013-12-27 | 2013-12-27 | Conveying device for preparing hydrogenation working section dimethyl oxalate in glycol with synthesis gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203686582U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107879362A (en) * | 2016-09-29 | 2018-04-06 | 内蒙古乌海化工有限公司 | A kind of induction system for evaporation of chlorine-alkali |
-
2013
- 2013-12-27 CN CN201320872613.5U patent/CN203686582U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107879362A (en) * | 2016-09-29 | 2018-04-06 | 内蒙古乌海化工有限公司 | A kind of induction system for evaporation of chlorine-alkali |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204572417U (en) | Urea pump test bench | |
| CN104307241B (en) | The purging method of a kind of ceramic filter | |
| CN102994061A (en) | Wax cleaning agent for hot water dispensing deep well high-pour point wax | |
| CN203686582U (en) | Conveying device for preparing hydrogenation working section dimethyl oxalate in glycol with synthesis gas | |
| CN205850808U (en) | Catalyst injection device | |
| CN203235705U (en) | Automatic cleaning device of solar photovoltaic module | |
| CN205182674U (en) | Stifled device is prevented to thick liquid attitude bed reactor distributor | |
| CN201596639U (en) | Groove type cleaning device and cleaning machine | |
| CN108191033A (en) | A kind of discarded sodium hypochlorite recycling and processing device | |
| CN202700875U (en) | Special cleaning device for cleaning valves | |
| CN202099246U (en) | Natural rock asphalt purification device | |
| CN202410883U (en) | Raw material spraying system for sandwich panel production line | |
| CN101530851B (en) | Cleaning device for valve scaling | |
| CN204111621U (en) | A kind of synthetic gas prepares the refining system of ethylene glycol | |
| CN205055708U (en) | A washing system for methyl alcohol system alkene | |
| CN203999439U (en) | Synthetic gas is prepared the hydrogenation workshop section heating device of ethylene glycol | |
| CN202538667U (en) | Alternative jet flow disturbance system | |
| CN201288230Y (en) | Water-supply device for winding machine | |
| CN203382526U (en) | Water treatment regeneration washing water multiplexing system | |
| CN202277990U (en) | Air knife cleaning device | |
| CN206240311U (en) | Asphalt mixing plant flue gas desulfurization systems denitrification apparatus | |
| CN202893172U (en) | Catalytic cracking dry-gas refinement separation system | |
| CN204627797U (en) | A kind of gas electricity unit blending LNG fuel apparatus | |
| CN205188170U (en) | Comprehensive utilization system is retrieved to useless methyl alcohol of different water content of synthetic gas system ethylene glycol technology | |
| CN203382532U (en) | Novel horizontal tower injection type deoxidization device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20171227 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |