CN212954950U - Device for reducing trace impurities in reflux liquid of coal-to-ethylene glycol refining tower - Google Patents
Device for reducing trace impurities in reflux liquid of coal-to-ethylene glycol refining tower Download PDFInfo
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- CN212954950U CN212954950U CN202021457498.1U CN202021457498U CN212954950U CN 212954950 U CN212954950 U CN 212954950U CN 202021457498 U CN202021457498 U CN 202021457498U CN 212954950 U CN212954950 U CN 212954950U
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Abstract
The utility model discloses a device for reducing trace impurity in coal-based ethylene glycol refining tower reflux, it includes the reflux hydrogenation pipeline that locates on the reflux pipeline, reflux hydrogenation pipeline and hydrogen pipeline intercommunication, reflux hydrogenation pipeline end and hydrogenation ware feed inlet are connected, and the hydrogenation ware discharge gate is connected with the gas-liquid separation jar through the discharge line, and the gas-liquid separation jar gas outlet is connected with the torch mouth through the exhaust pipe line, and the gas-liquid separation jar leakage fluid dram is communicated with the reflux pipeline through the drainage pipeline; the utility model discloses can handle the trace impurity in the ethylene glycol, effectively solve the trace impurity and handled the problem that causes pressure and influence ethylene glycol product quality to follow-up refined system.
Description
Technical Field
The utility model relates to an ethylene glycol edulcoration technical field specifically indicates a device for reducing trace impurity in coal system ethylene glycol refining tower reflux.
Background
Ethylene glycol is an important chemical raw material and strategic material, is used for manufacturing polyester, explosive and glyoxal, and can be used as an antifreezing agent, a plasticizer, a hydraulic fluid, a solvent and the like. The coal-made glycol is used for producing glycol by replacing petroleum ethylene with coal. The technical route conforms to the resource characteristics of oil shortage, gas shortage and relatively rich coal resources in China.
Compared with ethylene glycol prepared by a petroleum ethylene method, the ethylene glycol prepared by coal has some trace impurities which are difficult to separate, the ultraviolet light transmittance of the ethylene glycol at 220nm and 275nm is influenced, and the rectification difficulty of the trace impurities is high. At present, the treatment is mainly carried out through a product refining tank, so that the adsorbent in the refining tank is frequently replaced, and the cost is increased.
In order to improve the quality of ethylene glycol products and reduce the treatment pressure of a subsequent product refining tank, the treatment of trace impurities (such as unsaturated aldehydes and ketones) in the rectification process is urgent.
Disclosure of Invention
An object of the utility model is to overcome the above-mentioned not enough, provide a device for reducing trace impurity in coal system ethylene glycol refining tower reflux to the trace impurity in the ethylene glycol is handled, can effectively solve trace impurity and handle the problem that causes pressure and influence ethylene glycol product quality to follow-up refined system.
The utility model discloses a solve above-mentioned technical problem, the technical scheme who adopts is: the utility model provides a device for reducing trace impurity in coal system ethylene glycol refining tower backward flow liquid, it is including locating the backward flow liquid hydrogenation pipeline on the return line, backward flow liquid hydrogenation pipeline and hydrogen pipeline intercommunication, the backward flow liquid hydrogenation pipeline end is connected with hydrogenation ware feed inlet, and the hydrogenation ware discharge gate passes through discharge line and is connected with the gas-liquid separation jar, and the gas-liquid separation jar gas outlet passes through the exhaust pipe line and is connected with the torch mouth, and the gas-liquid separation jar leakage fluid dram passes through drainage line and return line intercommunication.
Preferably, one end of the return pipeline is connected with an exhaust port of the ethylene glycol refining tower, and the other end of the return pipeline is connected with a reflux liquid inlet of the ethylene glycol refining tower.
Preferably, the return pipeline is sequentially provided with a condenser, a return tank and a first valve, and the position of the return liquid hydrogenation pipeline communicated with the return pipeline is positioned between the return tank and the first valve.
Preferably, a second valve is arranged on the reflux liquid hydrogenation pipeline.
Preferably, a third valve is arranged on the liquid discharge pipeline, and a fourth valve is arranged on the exhaust pipeline.
Preferably, a feeding pipeline is arranged on one side of the ethylene glycol refining tower, a side production pipeline is arranged on the other side of the ethylene glycol refining tower, and a discharge pipeline is arranged at the bottom of the ethylene glycol refining tower.
Preferably, the hydrogenation reactor includes the retort, the retort upper end is equipped with the baffle, and the lower extreme is equipped with down the baffle, goes up the baffle and fills with the regional packing of baffle place down has the resin that contains the hydrogenation catalyst, still be equipped with the hollow dish of dispersion in the retort, many dispersion pipes are installed perpendicularly to the hollow dish one side of dispersion, evenly seted up a plurality of dispersion holes on the dispersion pipe, the hollow dish opposite side of dispersion is equipped with the inlet pipe, inlet pipe and the terminal intercommunication of backward flow hydrogenation pipeline.
Preferably, the upper clapboard is provided with through holes matched with the feeding pipe, and the lower clapboard is uniformly provided with sieve pores.
The utility model has the advantages that: the utility model adds a hydrogenation reactor in the reflux pipeline flow of the ethylene glycol refining tower, can process trace impurities (unsaturated aldehyde and ketone substances) in the ethylene glycol in the rectification process, solves the problem that the trace impurities in the ethylene glycol influence the ultraviolet light transmittance of the ethylene glycol at 220nm and 275nm, prolongs the service life of a subsequent refining tank, and has simple structural design, low operation cost and high reliability; effectively solves the problems that trace impurities cause pressure to the subsequent refining system treatment and influence the quality of the glycol product.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for reducing trace impurities in a reflux liquid of a coal-to-ethylene glycol refining tower;
FIG. 2 is a schematic diagram of the structure of the hydrogenation reactor of FIG. 1;
FIG. 3 is a schematic top view of the discrete hollow disc of FIG. 2;
FIG. 4 is a schematic bottom view of the discrete hollow disc of FIG. 2;
in the figure, a reflux pipeline 1, a reflux liquid hydrogenation pipeline 2, a hydrogenation reactor 3, a reaction tank 3.1, an upper baffle plate 3.2, a lower baffle plate 3.3, a dispersion hollow disc 3.4, a dispersion pipe 3.5, dispersion holes 3.6, a feeding pipe 3.7, a discharging pipeline 4, a gas-liquid separation tank 5, a gas exhaust pipeline 6, a liquid discharge pipeline 7, an ethylene glycol refining tower 8, a condenser 9, a reflux tank 10, a first valve 11, a second valve 12, a third valve 13, a fourth valve 14, a feeding pipeline 15, a side production pipeline 16 and a discharging pipeline 17.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1 to 4, a device for reducing trace impurities in reflux of a coal-to-ethylene glycol refining tower comprises a reflux hydrogenation pipeline 2 arranged on a reflux pipeline 1, wherein the reflux hydrogenation pipeline 2 is communicated with a hydrogen pipeline 2.1, the tail end of the reflux hydrogenation pipeline 2 is connected with a feed inlet of a hydrogenation reactor 3, a discharge outlet of the hydrogenation reactor 3 is connected with a gas-liquid separation tank 5 through a discharge pipeline 4, a gas outlet of the gas-liquid separation tank 5 is connected with a torch opening through a gas exhaust pipeline 6, and a liquid discharge opening of the gas-liquid separation tank 5 is communicated with the reflux pipeline 1 through a liquid discharge pipeline 7.
Preferably, one end of the return pipeline 1 is connected with an exhaust port of the ethylene glycol refining tower 8, and the other end is connected with a reflux liquid inlet of the ethylene glycol refining tower 8.
Preferably, a condenser 9, a reflux tank 10 and a first valve 11 are sequentially arranged on the reflux pipeline 1, and the position of the reflux liquid hydrogenation pipeline 2 communicated with the reflux pipeline 1 is positioned between the reflux tank 10 and the first valve 11.
Preferably, a second valve 12 is arranged on the reflux liquid hydrogenation pipeline 2.
Preferably, a third valve 13 is arranged on the liquid discharge line 7, and a fourth valve 14 is arranged on the exhaust line 6.
Preferably, a feeding pipeline 15 is arranged on one side of the ethylene glycol refining tower 8, a side production pipeline 16 is arranged on the other side of the ethylene glycol refining tower 8, and a discharge pipeline 17 is arranged at the bottom of the ethylene glycol refining tower 8. In this example, the raw material is fed from the feed line 15 into the ethylene glycol refining column 8 to be subjected to the refining process, while liquid ethylene glycol of higher purity is discharged from the side draw line 16 and stored, and liquid ethylene glycol of lower purity is discharged from the discharge line 17 to be fed to the next refining process.
Preferably, the hydrogenation reactor 3 comprises a reaction tank 3.1, an upper partition plate 3.2 is arranged at the upper end of the reaction tank 3.1, a lower partition plate 3.3 is arranged at the lower end of the reaction tank, a resin containing a hydrogenation catalyst is filled in the area where the upper partition plate 3.2 and the lower partition plate 3.3 are located, a dispersion hollow disc 3.4 is further arranged in the reaction tank 3.1, a plurality of dispersion pipes 3.5 are vertically arranged on one side of the dispersion hollow disc 3.4, a plurality of dispersion holes 3.6 are uniformly formed in each dispersion pipe 3.5, a feeding pipe 3.7 is arranged on the other side of the dispersion hollow disc 3.4, and the feeding pipe 3.7 is communicated with the tail end of the reflux hydrogenation pipeline 2. In this embodiment, the resin used may be macroporous adsorption resin, and the hydrogenation catalyst is a commonly used metal oxide catalyst, such as copper oxide-copper chromite, alumina-zinc oxide-chromium oxide catalyst, which can be used in hydrogenation processes of aldehyde, ketone, ester, acid, co, etc.; after the resin adsorbs the catalyst, the resin can be used as a carrier to react with liquid flowing from top to bottom to catalyze the hydrogenation process; because the liquid enters the dispersion hollow disc 3.4 from the feed pipe 3.7 and then is uniformly dispersed from the dispersion holes 3.6 of the plurality of dispersion pipes 3.5, the liquid can uniformly react with the resin, and the catalytic hydrogenation reaction efficiency is improved.
Preferably, the upper partition plate 3.2 is provided with a through hole matched with the feeding pipe 3.7, and the lower partition plate 3.3 is uniformly provided with sieve pores.
The working principle of the embodiment is as follows:
in this embodiment, the return line 1 is provided with a return pump, so that the liquid on the whole return line 1 can flow directionally; the gas phase part of the ethylene glycol refining tower 8 enters the reflux pipeline 1 from a top exhaust port, then is condensed by the condenser 9 to form liquid, and is stored in the reflux tank 10, then the first valve 11 is closed, the second valve 12 is opened, the liquid in the reflux tank 10 is pumped into the reflux liquid hydrogenation pipeline 2 by the reflux pump, then the hydrogen pipeline 2.1 sends hydrogen and the liquid in the reflux liquid hydrogenation pipeline 2 to be mixed together and enters the hydrogenation reactor 3 for hydrogenation reaction, namely unsaturated aldehyde and ketone substances in the ethylene glycol are subjected to hydrogenation process, the gas-liquid mixture after reaction passes through the sieve mesh of the lower clapboard 3.3, then enters the discharge pipeline 4 and finally is sent into the gas-liquid separation tank 5 for gas-liquid separation process, the gas-liquid separation tank 5 used in the embodiment is a gas-liquid separator, and the exhaust pipeline 6 is opened and is provided with a fourth valve 14, the separated gas phase is discharged from the exhaust pipeline 6 to a torch, after a third valve 13 on the liquid discharge pipeline 7 is opened, the liquid phase enters the liquid discharge pipeline 7 from a liquid discharge port, and finally the liquid returns to the return pipeline 1 and then flows back to the ethylene glycol refining tower 8.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (8)
1. The utility model provides a device for reducing trace impurity in coal system ethylene glycol refining tower reflux which characterized in that: it is including locating reflux hydrogenation pipeline (2) on return line (1), reflux hydrogenation pipeline (2) and hydrogen pipeline (2.1) intercommunication, reflux hydrogenation pipeline (2) end is connected with hydrogenation ware (3) feed inlet, and hydrogenation ware (3) discharge gate passes through discharge pipeline (4) and is connected with gas-liquid separation jar (5), and gas-liquid separation jar (5) gas outlet passes through exhaust pipe (6) and is connected with the torch mouth, and gas-liquid separation jar (5) leakage fluid dram passes through drainage pipeline (7) and return line (1) intercommunication.
2. The device for reducing the trace impurities in the reflux liquid of the coal-to-ethylene-glycol refining tower as claimed in claim 1, wherein: one end of the reflux pipeline (1) is connected with an exhaust port of the ethylene glycol refining tower (8), and the other end of the reflux pipeline is connected with a reflux liquid inlet of the ethylene glycol refining tower (8).
3. The device for reducing trace impurities in the reflux liquid of the coal-to-ethylene-glycol refining tower as claimed in claim 1 or 2, wherein: the reflux pipeline (1) is sequentially provided with a condenser (9), a reflux tank (10) and a first valve (11), and the reflux liquid hydrogenation pipeline (2) is communicated with the reflux pipeline (1) and is positioned between the reflux tank (10) and the first valve (11).
4. The device for reducing the trace impurities in the reflux liquid of the coal-to-ethylene-glycol refining tower as claimed in claim 1, wherein: and a second valve (12) is arranged on the reflux liquid hydrogenation pipeline (2).
5. The device for reducing the trace impurities in the reflux liquid of the coal-to-ethylene-glycol refining tower as claimed in claim 1, wherein: and a third valve (13) is arranged on the liquid drainage pipeline (7), and a fourth valve (14) is arranged on the exhaust pipeline (6).
6. The device for reducing the trace impurities in the reflux liquid of the coal-to-ethylene-glycol refining tower as claimed in claim 2, wherein: one side of the ethylene glycol refining tower (8) is provided with a feeding pipeline (15), the other side of the ethylene glycol refining tower is provided with a side extraction pipeline (16), and the bottom of the ethylene glycol refining tower (8) is provided with a discharge pipeline (17).
7. The device for reducing the trace impurities in the reflux liquid of the coal-to-ethylene-glycol refining tower as claimed in claim 1, wherein: hydrogenation ware (3) are including retort (3.1), retort (3.1) upper end is equipped with baffle (3.2), and the lower extreme is equipped with down baffle (3.3), goes up baffle (3.2) and lower baffle (3.3) place regional packing have the resin that contains hydrogenation catalyst, still be equipped with dispersion hollow dish (3.4) in retort (3.1), many dispersion pipes (3.5) are installed perpendicularly to dispersion hollow dish (3.4) one side, evenly seted up a plurality of dispersion holes (3.6) on dispersion pipe (3.5), dispersion hollow dish (3.4) opposite side is equipped with inlet pipe (3.7), inlet pipe (3.7) and backward flow liquid hydrogenation pipeline (2) end intercommunication.
8. The device for reducing the trace impurities in the reflux liquid of the coal-to-ethylene-glycol refining tower as claimed in claim 7, wherein: the upper partition plate (3.2) is provided with through holes matched with the feeding pipe (3.7), and the lower partition plate (3.3) is uniformly provided with sieve meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021457498.1U CN212954950U (en) | 2020-07-22 | 2020-07-22 | Device for reducing trace impurities in reflux liquid of coal-to-ethylene glycol refining tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021457498.1U CN212954950U (en) | 2020-07-22 | 2020-07-22 | Device for reducing trace impurities in reflux liquid of coal-to-ethylene glycol refining tower |
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| Publication Number | Publication Date |
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| CN212954950U true CN212954950U (en) | 2021-04-13 |
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| CN202021457498.1U Active CN212954950U (en) | 2020-07-22 | 2020-07-22 | Device for reducing trace impurities in reflux liquid of coal-to-ethylene glycol refining tower |
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| CN (1) | CN212954950U (en) |
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- 2020-07-22 CN CN202021457498.1U patent/CN212954950U/en active Active
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