CN218047236U - Acetylene tail gas treatment system - Google Patents
Acetylene tail gas treatment system Download PDFInfo
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- CN218047236U CN218047236U CN202222054738.9U CN202222054738U CN218047236U CN 218047236 U CN218047236 U CN 218047236U CN 202222054738 U CN202222054738 U CN 202222054738U CN 218047236 U CN218047236 U CN 218047236U
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Abstract
The utility model discloses an acetylene tail gas processing system, including combination tower and the same absorption tower and analytic tower of structure, all be provided with acetylene gas export on absorption tower and the analytic tower, the organic solvent import, acetylene tail gas import, the organic solvent export, the combination tower includes the ordinary pressure degassing tower, the vacuum degassing tower, the solvent storage tower, the organic solvent export of absorption tower and the organic solvent access connection of analytic tower, the organic solvent export of analytic tower and the organic solvent access connection on the ordinary pressure degassing tower, the acetylene gas export of ordinary pressure degassing tower and the acetylene tail gas access connection of analytic tower, the organic solvent export of ordinary pressure degassing tower and the organic solvent access connection of vacuum degassing tower, the organic solvent export of vacuum degassing tower and the organic solvent access connection of solvent storage tower, the organic solvent export of solvent storage tower and the organic solvent access connection of absorption tower; the utility model discloses can realize that the high efficiency of acetylene gas absorbs the analysis, effectively improve the off-the-shelf purity of acetylene gas simultaneously.
Description
Technical Field
The utility model belongs to the technical field of acetylene tail gas treatment retrieves, specifically be an acetylene tail gas processing system.
Background
Acetylene is an important basic organic raw material, can be used for preparing vinyl chloride, polyvinyl chloride (PVC), acetaldehyde and the like, can be used for cutting or welding metal by high-temperature oxyacetylene flame generated during combustion, and is an important energy material indispensable in industrial production. In China, the proportion of acetylene produced by a calcium carbide method is over 80 percent, wherein a wet acetylene production process is mostly adopted, the slurry discharged by a wet acetylene generator also contains 250 to 400mg/L of acetylene gas according to industrial data, and if the acetylene gas is directly discharged along with the calcium carbide slurry, the environment is polluted, raw material waste is caused, and potential safety hazards are also generated. With the continuous promotion of the state to the energy saving and consumption reduction and the clean production standard of the chemical industry and the continuous increase of the energy price, how to reduce the production energy consumption of the device and ensure the quality of the raw materials becomes a problem which is urgently needed to be solved by the production enterprises. In order to ensure good atmospheric environment and reduce production cost, the addition of an acetylene tail gas recovery device is a necessary choice for related production enterprises.
The existing acetylene tail gas recovery device is used for absorbing and resolving the acetylene tail gas by arranging an independent recovery tower, but in the process of absorbing and resolving, the acetylene gas can be fused into an organic solvent, so that the yield of the final acetylene gas is reduced, and the purity of the final acetylene gas finished product is also reduced. Moreover, the existing acetylene tail gas recovery device directly leads acetylene tail gas into an organic solvent, so that the reaction efficiency between the acetylene tail gas and the organic solvent is insufficient, and the absorption and analysis efficiency of acetylene gas is further reduced.
Consequently, absorb the defect that analytic efficiency is not enough, final acetylene gas finished product output and purity are not enough to exist among the analytic process to current acetylene tail gas absorption, the utility model discloses an acetylene tail gas processing system.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an acetylene tail gas processing system can realize carrying out the high efficiency to acetylene gas and absorb analytic processing, effectively guarantees final acetylene gas off-the-shelf output and purity simultaneously.
The utility model discloses a following technical scheme realizes:
the utility model provides an acetylene tail gas processing system, includes combination tower and absorption tower and analytic tower that the structure is the same, the inside of absorption tower and analytic tower is all from last to being provided with comdenstion water sprinkler, tower tray, filler down, all from last to having set gradually acetylene gas export, organic solvent import, acetylene tail gas import, organic solvent export on absorption tower and the analytic tower down, the combination tower includes from last to the atmospheric degassing tower of the built-in filler that sets gradually, the vacuum degassing tower of built-in bubble cap, solvent storage tower down, the organic solvent export of absorption tower and the organic solvent access connection of analytic tower, the organic solvent export of analytic tower and the organic solvent access connection on the atmospheric degassing tower, the acetylene gas export at atmospheric degassing tower top and the acetylene tail gas access connection of analytic tower, the organic solvent export of the bottom of the atmospheric degassing tower and the organic solvent access connection at vacuum degassing tower top, the organic solvent export of vacuum tower bottom and the organic solvent access connection at solvent storage tower top, the organic solvent export of solvent storage tower bottom and the organic solvent access connection of absorption tower of solvent storage tower bottom are connected.
It should be noted that the absorption tower and the desorption tower have the same structure, and the absorption tower is only used for absorbing acetylene tail gas for the first time, and the desorption tower is used for desorbing and purifying acetylene tail gas for the second time.
Acetylene tail gas to be treated enters the absorption tower through an acetylene tail gas inlet on the absorption tower, meanwhile, an organic solvent from the solvent storage tower enters the absorption tower through an organic solvent inlet on the absorption tower, the acetylene tail gas and the organic solvent pass through the filler and react in the filler, and the acetylene tail gas is absorbed by the organic solvent. The unabsorbed acetylene tail gas is discharged upwards through an acetylene gas outlet at the top of the absorption tower, and the residual organic solvent is pumped downwards to the desorption tower through an organic solvent outlet at the bottom of the absorption tower to participate in acetylene purification.
Acetylene gas from the atmospheric degassing tower enters the desorption tower through an acetylene tail gas inlet on the desorption tower, meanwhile, the organic solvent from the absorption tower enters the desorption tower through an organic solvent inlet on the desorption tower, and the acetylene tail gas and the organic solvent are subjected to secondary absorption and purification through a filler in the desorption tower. The acetylene gas after purification is discharged through an acetylene gas outlet at the top of the desorption tower and collected, the residual organic solvent is pumped to the atmospheric degassing tower through an organic solvent outlet at the bottom of the desorption tower, the organic solvent entering the atmospheric degassing tower participates in the absorption of the acetylene gas, the residual organic solvent enters the vacuum degassing tower downwards, the acetylene gas dissolved in the organic solvent entering the vacuum degassing tower is separated out due to the fact that a gas tower in the vacuum degassing tower is far lower than the air pressure in the atmospheric degassing tower, and the organic solvent separating out the acetylene gas flows to a solvent storage tower through an organic solvent outlet at the bottom of the vacuum degassing tower and is stored. The organic solvent entering the solvent storage tower is pumped back to the absorption tower to participate in acetylene tail gas absorption, and then the acetylene is circularly absorbed and purified.
In order to better realize the utility model, the device further comprises an organic solvent circulating device and a heat exchange device, wherein the liquid inlet end of the organic solvent circulating device is connected with an organic solvent outlet at the bottom of the vacuum degassing tower, the first liquid outlet end of the organic solvent circulating device is connected with the top of the vacuum degassing tower in a backflow manner, and the second liquid outlet end of the organic solvent circulating device is connected with a solvent storage tower through the heat exchange device; and an organic solvent outlet of the desorption tower is connected with the normal-pressure degassing tower through a heat exchange device.
The organic solvent after the acetylene is separated out in the vacuum degassing tower is divided into two parts, the first part of the organic solvent returns to the top of the vacuum degassing tower from the bottom of the vacuum degassing tower through a first liquid outlet end of the organic solvent circulating device and then flows to the bottom of the vacuum degassing tower from the top of the vacuum degassing tower again to realize the self-circulation of the organic solvent in the vacuum degassing tower, the acetylene gas in the organic solvent is further separated out, and the second part of the organic solvent is pumped to the heat exchange device through a second liquid outlet end of the organic solvent circulating device. Because the temperature of the organic solvent from the vacuum degassing tower is higher than that of the organic solvent from the desorption tower, in the heat exchange device, the organic solvent from the vacuum degassing tower is cooled and flows to the solvent storage tower for storage, and the organic solvent from the desorption tower is heated and then enters the atmospheric degassing tower to participate in acetylene tail gas absorption.
In order to realize better the utility model discloses, it is further, organic solvent circulating device includes organic solvent circulating pump, organic solvent heater, the inlet end of organic solvent circulating pump and the organic solvent exit linkage of vacuum degassing tower bottom, the first play liquid end of organic solvent circulating pump is connected with vacuum degassing tower top through organic solvent heater, the second play liquid end of organic solvent circulating pump passes through heat transfer device and is connected with the solvent storage tower.
In order to realize better the utility model discloses, it is further, heat transfer device includes organic solvent heat exchanger, organic solvent condenser, the organic solvent export of analytic tower bottom is passed through the organic solvent heat exchanger and is connected with the ordinary pressure degasification tower, and organic solvent circulating device's second goes out the liquid end and loops through organic solvent heat exchanger, organic solvent condenser and solvent storage tower and be connected.
In order to better realize the utility model discloses, it is further, be provided with gaseous phase circulating device between ordinary pressure degasification tower and the vacuum degassing tower, gaseous phase circulating device's inlet end is connected with the vacuum degassing tower, gaseous phase circulating device's the end of giving vent to anger is connected with ordinary pressure degasification tower.
In order to better realize the utility model discloses, it is further, gaseous phase circulating device includes the circulating gas compressor, the inlet end of circulating gas compressor and the first gaseous phase exit linkage on the vacuum degassing tower, the gaseous phase access connection on the end of giving vent to anger and the atmospheric pressure degassing tower of circulating gas compressor.
In order to realize the utility model discloses better, it is further, be provided with the export of second gaseous phase on the vacuum degassing tower, the export of second gaseous phase is connected with vacuum tail gas processing apparatus.
In order to realize better the utility model discloses, it is further, the acetylene gas export at absorption tower top is connected with the inlet end of the outer defroster of first tower, the outer defroster of first tower is given vent to anger the end and is connected with tail gas torch treater, the play liquid end of the outer defroster of first tower and the backward flow access connection of absorption tower bottom.
In order to realize better the utility model discloses, it is further, the acetylene gas export at analytic tower top is connected with the inlet end of the outer defroster of second tower, the end of giving vent to anger of the outer defroster of second tower is connected with acetylene product gas holder, the play liquid end of the outer defroster of second tower and the backward flow access connection of analytic tower bottom.
In order to better realize the utility model discloses, it is further, the organic solvent export of absorption tower bottom and the organic solvent import on the desorption tower are through the tube coupling that has the solvent pump.
In order to better realize the utility model discloses, it is further, the organic solvent export of desorption tower bottom is through the pipeline that has the solvent pump respectively with the organic solvent import of atmospheric degassing tower and the organic solvent access connection of solvent storage tower.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
(1) The utility model carries out primary absorption and analysis on the acetylene tail gas by arranging the absorption tower, then leads the residual organic solvent in the absorption and analysis process into the analysis tower, and carries out secondary absorption and analysis operation with the acetylene tail gas from the atmospheric degassing tower, thereby improving the absorption and analysis efficiency of the acetylene tail gas;
(2) The utility model discloses a set up ordinary pressure degasification tower and vacuum degassing tower, let into the organic solvent that has fused acetylene gas in the analytic tower and carry out the once of acetylene gas and separate out in the room temperature degasification tower, then continue letting in organic solvent in the vacuum degassing tower for organic solvent realizes that acetylene gas's secondary is separated out in the environment that atmospheric pressure is lower, and then effectively draws the acetylene gas that has fused organic solvent in the absorption analytic process, and then improves the finished output of acetylene gas and purity of final output;
(3) The utility model discloses a set up gaseous phase circulating device between atmospheric degassing tower and vacuum degassing tower, through gaseous phase circulating device with acetylene gas circulation reflux to atmospheric degassing tower that separates out in the vacuum degassing tower, and then there is the difference in temperature in the inside of the acetylene gas that makes the backward flow and atmospheric degassing tower for acetylene gas carries out high-efficient analysis once more in atmospheric degassing tower is inside, further promotes the purity of acetylene gas, makes the purity of the acetylene tail gas of retrieving can reach 98%, and no waste water waste gas produces.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an acetylene tail gas treatment system;
FIG. 2 is a schematic diagram of the structure of an absorption column or a desorption column;
FIG. 3 is a schematic view of the structure of a combination column.
Wherein: 1-an absorption column; 2-a resolution tower; 31-atmospheric degassing tower; 32-vacuum degassing tower; 33-a solvent storage column; 41-organic solvent circulating pump; 42-organic solvent heater; 43-organic solvent heat exchanger; 44-organic solvent condenser; 45-solvent transfer vessel; 51-recycle gas compressor; 52-vacuum tail gas treatment device; 6-a tail gas flare processor; 7-acetylene product gas holder; 8-a cyclone demister; 9-condensed water spray; 01-an acetylene gas outlet; 02-an organic solvent inlet; 03-acetylene tail gas inlet; 04-an organic solvent outlet; 05-a shielding gas inlet; 06-reflux liquid inlet; 101-a first gas phase outlet; 202-a second gas phase outlet; 111-a first external tower demister; 222-a second external tower demister.
Detailed Description
Example 1:
an acetylene tail gas processing system of this embodiment, as shown in fig. 1-fig. 3, including combination tower and absorption tower 1 and analytic tower 2 that the structure is the same, all be provided with condensate water sprinkler, tray, filler from last to down in absorption tower 1 and analytic tower 2's inside, all from last to having set gradually acetylene gas outlet 01, organic solvent import 02, acetylene tail gas import 03, organic solvent export 04 on absorption tower 1 and the analytic tower 2, combination tower includes from last to down the atmospheric degassing tower 31 of the built-in filler that sets gradually, vacuum degassing tower 32, the solvent storage tower 33 of built-in bubble cap, the organic solvent export 04 of absorption tower 1 is connected with the organic solvent import 02 of analytic tower 2, the organic solvent export 04 of analytic tower 2 is connected with organic solvent import 02 on atmospheric degassing tower 31 and the organic solvent import 02 on solvent storage tower 33 respectively, the acetylene gas outlet 01 at atmospheric degassing tower 31 top is connected with the acetylene tail gas import 03 of analytic tower 2, the organic solvent export 04 at the bottom of atmospheric degassing tower 31 is connected with the organic solvent import 02 at the top of vacuum degassing tower 32, the organic solvent export 04 at the bottom of atmospheric degassing tower 31 is connected with organic solvent import 33 and the organic solvent import of organic solvent storage tower 02 and organic solvent storage tower 33 respectively the organic solvent import 04 is connected.
The top of absorption tower 1 is provided with acetylene gas export 01, and the bottom is provided with organic solvent export 04, and the inside of absorption tower 1 has set gradually comdenstion water sprinkler, tower tray, filler from last to down, sets up organic solvent import 02 between the bottom that lies in the top of filler and tower tray on the shaft of absorption tower 1, and the bottom that lies in the filler on the shaft of absorption tower 1 is provided with acetylene tail gas import 03. Acetylene tail gas enters the absorption tower 1 through an acetylene tail gas inlet 03, and simultaneously, the organic solvent from the solvent storage tower 33 enters the absorption tower 1 through an organic solvent inlet 02. Acetylene tail gas upwards passes through the filler, and the organic solvent downwards passes through the filler, so that the acetylene tail gas and the organic solvent react in the filler, and the acetylene tail gas is absorbed. The residual acetylene tail gas continuously passes through the tower tray upwards and then is discharged through an acetylene gas outlet 01 at the top of the absorption tower 1, and the residual organic solvent is pumped to a desorption tower 2 downwards through an organic solvent outlet at the bottom of the absorption tower 1.
The top of desorption tower 2 is provided with acetylene gas export 01, and the bottom is provided with organic solvent export 04, and desorption tower 2's inside has set gradually comdenstion water sprinkler, tower tray, filler from last to down, lies in on the shaft of desorption tower 2 to set up organic solvent import 02 between the top of filler and the bottom of tower tray, and the bottom that lies in the filler on the shaft of desorption tower 2 is provided with acetylene tail gas import 03. Acetylene tail gas from the atmospheric degassing tower 31 enters the desorption tower 2 through an acetylene tail gas inlet 03, and simultaneously the organic solvent from the absorption tower 1 enters the desorption tower 2 through an organic solvent inlet 02. Acetylene tail gas upwards passes through the filler, and the organic solvent downwards passes through the filler, so that the acetylene tail gas and the organic solvent react in the filler, and secondary desorption and absorption of the acetylene tail gas are realized. The residual acetylene tail gas continuously passes through the tower tray upwards and then is discharged through an acetylene gas outlet 01 at the top of the desorption tower 2, and the residual organic solvent is pumped to the atmospheric degassing tower 31 downwards through an organic solvent outlet at the bottom of the desorption tower 2.
In the combined tower, the organic solvent mixed with acetylene gas from the desorption tower 2 enters the atmospheric degassing tower 31 through the organic solvent inlet 02, the middle part of the inner side of the atmospheric degassing tower 31 is provided with a filler, and the temperature inside the atmospheric degassing tower 31 is maintained at 70 ℃ or higher. The organic solvent entering the atmospheric degassing tower 31 passes through the packing from top to bottom, and under the action of high temperature inside the atmospheric degassing tower 31, part of acetylene gas in the organic solvent is separated out, and the acetylene gas is discharged through an acetylene gas outlet 01 at the top of the atmospheric degassing tower 31. The bottom of the atmospheric degassing tower 31 is provided with an organic solvent outlet 04, the top of the vacuum degassing tower 32 is provided with an organic solvent inlet 02 connected with the organic solvent outlet 04 at the bottom of the atmospheric degassing tower 31 through a connecting pipeline, and the connecting pipeline is provided with an electromagnetic valve to control the on-off of the connecting pipeline. The inside of the vacuum degassing tower 32 is located between the top and the bottom and is provided with a plurality of layers of bubble caps from top to bottom in sequence, the organic solvent entering the vacuum degassing tower 32 passes through the bubble caps from top to bottom in sequence under the action of gravity, and simultaneously, the acetylene in the organic solvent is separated out in a large amount because the air pressure in the vacuum degassing tower 32 is far lower than the internal air pressure in the normal-pressure degassing tower 31. The organic solvent is deposited to the bottom of the vacuum degassing tower 32, flows to the solvent storage tower 33 through the organic solvent outlet 04 at the bottom of the vacuum degassing tower 32 for storage, and the organic solvent in the solvent storage tower 33 is pumped to the absorption tower 1 to participate in the cyclic absorption treatment of acetylene.
Further, a solvent outlet with an electromagnetic valve is provided at the bottom of the vacuum degassing tower 32, and when the amount of the solvent deposited in the vacuum degassing tower 32 reaches a set value after the solvent in the vacuum degassing tower 32 is self-circulated for a certain period of time, the electromagnetic valve on the solvent outlet is opened to discharge the solvent in the vacuum degassing tower 32 in time.
Further, the inboard top of ordinary pressure degasification tower 31 corresponds acetylene gas outlet 01 and is provided with whirl defroster 8, and the water smoke in the acetylene gas can effectively be held back through whirl defroster 8 at first through the whirl defroster 8 of acetylene gas outlet 01 exhaust acetylene, and inside water smoke formed the water droplet in whirl defroster 8 outside and fallen back to ordinary pressure degasification tower 31, the realization was to the effective dehydration of acetylene gas.
Further, an arc-shaped liquid storage part is arranged at the bottom of the inner side of the atmospheric degassing tower 31, and an organic solvent outlet 04 connected with an organic solvent inlet 02 at the top of the vacuum degassing tower 32 is arranged at the bottom of the arc-shaped liquid storage part.
Example 2:
the present embodiment is further optimized on the basis of embodiment 1, and as shown in fig. 1, the present embodiment further includes an organic solvent circulation device and a heat exchange device, a liquid inlet end of the organic solvent circulation device is connected to an organic solvent outlet 04 at the bottom of the vacuum degassing tower 32, a first liquid outlet end of the organic solvent circulation device is connected to the top of the vacuum degassing tower 32 in a reflux manner, and a second liquid outlet end of the organic solvent circulation device is connected to the solvent storage tower 33 through the heat exchange device; the organic solvent outlet 04 of the desorption tower 2 is connected with the atmospheric degassing tower 31 through a heat exchange device.
The organic solvent circulation device is used for realizing self circulation of the organic solvent in the vacuum degassing tower 32 and conveying the organic solvent in the vacuum degassing tower 32 to the solvent storage tower 33 for storage. Part of the organic solvent at the bottom of the vacuum degassing tower 32 flows back to the top of the vacuum degassing tower 32 through the first liquid outlet end of the organic solvent circulating device, so that the organic solvent at the bottom of the vacuum degassing tower 32 flows from the top of the vacuum degassing tower 32 to the bottom again, and the acetylene gas in the organic solvent is further separated out by matching with a bubble cap inside the vacuum degassing tower 32. Another part of the organic solvent at the bottom of the vacuum degassing tower 32 is transported to the heat exchange device through the second liquid outlet end of the organic solvent circulation device, and the organic solvent from the organic solvent outlet 04 of the desorption tower 2 is introduced into the heat exchange device. Since the temperature of the organic solvent in the vacuum degassing tower 32 is higher than that of the organic solvent in the desorption tower 2, the organic solvent from the vacuum degassing tower 32 is cooled and flows to the solvent storage tower 33, and the organic solvent from the desorption tower 2 is heated and flows to the atmospheric degassing tower 31 to participate in the absorption of acetylene gas in the heat exchange device.
Further, as shown in fig. 1, the organic solvent circulation device includes an organic solvent circulation pump 41 and an organic solvent heater 42, a liquid inlet end of the organic solvent circulation pump 41 is connected to an organic solvent outlet 04 at the bottom of the vacuum degassing tower 32, a first liquid outlet end of the organic solvent circulation pump 41 is connected to the top of the vacuum degassing tower 32 through the organic solvent heater 42, and a second liquid outlet end of the organic solvent circulation pump 41 is connected to the solvent storage tower 33 through a heat exchange device.
The liquid inlet end of the organic solvent circulating pump 41 is connected with the organic solvent outlet 04 at the bottom of the vacuum degassing tower 32 through a pipeline, the liquid outlet end of the organic solvent circulating pump 41 is provided with a double-way pipe, one pipeline of the double-way pipe is a first liquid outlet end and is connected with the top of the vacuum degassing tower 32 through a pipeline with an organic solvent heater 42, and the other pipeline of the double-way pipe is a second liquid outlet end and is connected with the solvent storage tower 33 through a pipeline after passing through the heat exchange part of the heat exchange device. Part of the organic solvent from the bottom of the vacuum degassing tower 32 is heated by the organic solvent heater 42 and then refluxed to the top of the vacuum degassing tower 32, and then circulated from top to bottom inside the vacuum degassing tower 32, thereby realizing self-circulation of the organic solvent inside the vacuum degassing tower 32. The other part of the organic solvent from the bottom of the vacuum degassing tower 32 enters the heat exchange part of the heat exchange device, exchanges heat with the organic solvent with lower temperature from the bottom of the desorption tower 2, reduces the temperature, and flows to the solvent storage tower 33 for storage.
Further, as shown in fig. 1, the heat exchange device includes an organic solvent heat exchanger 43 and an organic solvent condenser 44, the organic solvent outlet 04 at the bottom of the desorption tower 2 is connected to the atmospheric degassing tower 31 through the organic solvent heat exchanger 43, and the second liquid outlet end of the organic solvent circulation device is connected to the solvent storage tower 33 through the organic solvent heat exchanger 43 and the organic solvent condenser 44 in sequence.
Further, as shown in fig. 1, the system further comprises a solvent transfer container 45, a first liquid inlet end of the solvent transfer container 45 is connected with the organic solvent outlet 04 at the bottom of the desorption tower 2 through a pipeline with a solvent pump, and a second liquid inlet end of the solvent transfer container 45 is connected with an external solvent replenishing tank. The analysis tower 2 and the external solvent replenishing tank synchronously convey the organic solvent to the solvent transfer container 45 to replenish the organic solvent, and simultaneously cool the organic solvent from the analysis tower 2, and then the liquid outlet end of the solvent transfer container 45 is connected with the heat exchange part of the heat exchange device through a pipeline.
Other parts of this embodiment are the same as those of embodiment 1, and thus are not described again.
Example 3:
this embodiment is further optimized based on the above embodiment 1 or 2, as shown in fig. 1 and fig. 3, a gas phase circulation device is disposed between the atmospheric degassing tower 31 and the vacuum degassing tower 32, a gas inlet of the gas phase circulation device is connected to the vacuum degassing tower 32, and a gas outlet of the gas phase circulation device 4 is connected to the atmospheric degassing tower 31.
After the acetylene gas in the organic solvent in the vacuum degassing tower 32 is separated out, the acetylene gas is circulated from the vacuum degassing tower 32 to the atmospheric degassing tower 31 by a gas phase circulation device, and then reacts with the organic solvent in the atmospheric degassing tower 31 in the packing.
Further, the gas phase circulation device comprises a recycle gas compressor 51, wherein the gas inlet end of the recycle gas compressor 51 is connected with the first gas phase outlet 101 on the vacuum degassing tower 32, and the gas outlet end of the recycle gas compressor 51 is connected with the gas phase inlet on the atmospheric degassing tower 31. The recycle gas compressor 51 is arranged on the gas phase circulation pipeline, the gas inlet end of the gas phase circulation pipeline is connected with the first gas phase outlet 101 on the vacuum degassing tower 32, the gas outlet end of the gas phase circulation pipeline is connected with the gas phase inlet on the normal pressure degassing tower 31, and then under the action of the recycle gas compressor 51, the acetylene gas separated out in the vacuum degassing tower 32 enters the normal pressure degassing tower 31 to participate in the reabsorption operation.
Further, a second gas phase outlet 202 is disposed on the vacuum degassing tower 32, and the second gas phase outlet 202 is connected to the vacuum tail gas treatment device 52. In order to avoid the overpressure in the atmospheric degassing tower 31, part of the acetylene gas precipitated in the vacuum degassing tower 32 does not flow back to the atmospheric degassing tower 31, but is directly discharged to the vacuum tail gas treatment device 52 through the second gas phase outlet 202 for harmless treatment and then discharged.
The rest of this embodiment is the same as embodiment 1 or 2, and therefore, the description thereof is omitted.
Example 4:
in this embodiment, a swirl demister 8 is disposed at the top of the inner side of the absorption tower 1 corresponding to the acetylene gas outlet 01, the acetylene gas outlet 01 at the top of the absorption tower 1 is connected to the gas inlet of a first outer-tower demister 111, the gas outlet of the first outer-tower demister 111 is connected to the tail gas flare processor 6, and the liquid outlet of the first outer-tower demister 111 is connected to the reflux inlet 06 at the bottom of the absorption tower 1, as shown in fig. 1 and 2.
The inside acetylene gas of absorption tower 1 at first carries out the whirl defogging through whirl defroster 8 before passing through the outer row of 01 acetylene gas export, effectively dewaters acetylene gas. Acetylene gas through primary dehydration is discharged to the outer defroster 111 of first tower through the acetylene gas export 01 and is carried out the secondary defogging, and the liquid phase that the defogging condenses flows back to the inlet 06 of reflux liquid of absorption tower 1 bottom through the play liquid end of the outer defroster 111 of first tower, and the gaseous phase of separation then gives vent to anger through the outer defroster 111 of first tower end flow direction tail gas torch treater 6 and burns innoxious outer the arranging.
Other parts of this embodiment are the same as any of embodiments 1 to 3, and thus are not described again.
Example 5:
in this embodiment, a swirl demister 8 is disposed at the top of the inner side of the desorption tower 2 corresponding to the acetylene gas outlet 01, as shown in fig. 1 and fig. 2, the acetylene gas outlet 01 at the top of the desorption tower 2 is connected to the gas inlet end of a second external tower demister 222, the gas outlet end of the second external tower demister 222 is connected to the acetylene product gas tank 7, and the liquid outlet end of the second external tower demister 222 is connected to a reflux inlet 06 at the bottom of the desorption tower 2.
The acetylene gas inside the analytic tower 2 is firstly subjected to cyclone defogging through the cyclone defogger 8 before being discharged through the acetylene gas outlet 01, so that the acetylene gas is effectively dehydrated. The acetylene gas after primary dehydration is discharged to a second tower outer demister 222 through an acetylene gas outlet 01 for secondary demisting, a demisting condensed liquid phase flows back to a reflux inlet 06 at the bottom of the desorption tower 2 through a liquid outlet end of the second tower outer demister 222, and a separated gas phase flows to an acetylene product gas cabinet 7 through a gas outlet end of the second tower outer demister 222 for finished acetylene storage.
Other parts of this embodiment are the same as any of embodiments 1 to 4, and thus are not described again.
Example 6:
this embodiment is further optimized on the basis of any one of the above embodiments 1 to 5, and as shown in fig. 1, the organic solvent outlet 04 at the bottom of the absorption tower 1 is connected with the organic solvent inlet 02 on the desorption tower 2 through a pipeline with a solvent pump. And pumping the organic solvent at the bottom of the absorption tower 1 to the desorption tower 2 through a solvent pump to participate in reabsorption and desorption, thereby realizing the purification of the acetylene gas.
The rest of this embodiment is the same as any of embodiments 1 to 5 described above, and therefore, the description thereof is omitted.
Example 7:
this embodiment is further optimized on the basis of any one of the above embodiments 1 to 6, and as shown in fig. 1, the organic solvent outlet 04 at the bottom of the desorption tower 2 is connected to the organic solvent inlet 02 of the atmospheric degassing tower 31 and the organic solvent inlet 02 of the solvent storage tower 33 through pipelines with solvent pumps, respectively. The organic solvent at the bottom of the desorption tower 2 is pumped to a heat exchange device through a solvent pump for heat exchange and temperature rise, and then is conveyed to the normal-pressure degassing tower 31 for acetylene gas separation operation.
Other parts of this embodiment are the same as any of embodiments 1 to 6, and thus are not described again.
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.
Claims (10)
1. The utility model provides an acetylene tail gas processing system, is including combination tower and absorption tower (1) and analytic tower (2) that the structure is the same, all be provided with comdenstion water sprinkler, tray, filler from last to down in absorption tower (1) and analytic tower (2) inside, its characterized in that, all from last to having set gradually acetylene gas export (01), organic solvent import (02), acetylene tail gas import (03), organic solvent export (04) on absorption tower (1) and analytic tower (2), combination tower includes from last to the atmospheric degassing tower (31) of the built-in filler that sets gradually down, vacuum degassing tower (32), the solvent storage tower (33) of built-in bubble cap, organic solvent export (04) and the organic solvent import (02) of analytic tower (2) are connected, the organic solvent export (04) of analytic tower (2) and the organic solvent import (02) on atmospheric degassing tower (31) are connected, the acetylene gas export (01) and the tail gas import (2) at atmospheric degassing tower (31) top of atmospheric tower (31) top are connected with the organic solvent import (32) of atmospheric degassing tower (04) and the organic solvent import (33) are connected the organic solvent export (04) of atmospheric degassing tower (02) and the organic solvent import (04) of atmospheric degassing tower (33) are connected Then, an organic solvent outlet (04) at the bottom of the solvent storage tower (33) is connected with an organic solvent inlet (02) of the absorption tower (1).
2. An acetylene tail gas treatment system according to claim 1, characterized by further comprising an organic solvent circulation device and a heat exchange device, wherein the liquid inlet end of the organic solvent circulation device is connected with an organic solvent outlet (04) at the bottom of the vacuum degassing tower (32), the first liquid outlet end of the organic solvent circulation device is connected with the top of the vacuum degassing tower (32) in a reflux manner, and the second liquid outlet end of the organic solvent circulation device is connected with a solvent storage tower (33) through the heat exchange device; the organic solvent outlet (04) of the desorption tower (2) is connected with the atmospheric degassing tower (31) through a heat exchange device.
3. An acetylene tail gas treatment system according to claim 2, characterized in that the organic solvent circulation device comprises an organic solvent circulation pump (41) and an organic solvent heater (42), the liquid inlet end of the organic solvent circulation pump (41) is connected with the organic solvent outlet (04) at the bottom of the vacuum degassing tower (32), the first liquid outlet end of the organic solvent circulation pump (41) is connected with the top of the vacuum degassing tower (32) through the organic solvent heater (42), and the second liquid outlet end of the organic solvent circulation pump (41) is connected with the solvent storage tower (33) through a heat exchange device.
4. An acetylene tail gas treatment system according to claim 2, wherein the heat exchange device comprises an organic solvent heat exchanger (43) and an organic solvent condenser (44), an organic solvent outlet (04) at the bottom of the desorption tower (2) is connected with the atmospheric degassing tower (31) through the organic solvent heat exchanger (43), and a second liquid outlet end of the organic solvent circulation device is connected with the solvent storage tower (33) through the organic solvent heat exchanger (43) and the organic solvent condenser (44) in sequence.
5. An acetylene tail gas treatment system according to claim 1, characterized in that a gas phase circulation device is arranged between the atmospheric degassing tower (31) and the vacuum degassing tower (32), the gas inlet end of the gas phase circulation device is connected with the vacuum degassing tower (32), and the gas outlet end of the gas phase circulation device (4) is connected with the atmospheric degassing tower (31).
6. An acetylene tail gas treatment system according to claim 5, characterized in that the gas phase circulation device comprises a recycle gas compressor (51), the gas inlet end of the recycle gas compressor (51) is connected with the first gas phase outlet (101) on the vacuum degassing tower (32), and the gas outlet end of the recycle gas compressor (51) is connected with the gas phase inlet on the atmospheric degassing tower (31).
7. An acetylene tail gas treatment system according to claim 6, characterized in that the vacuum degassing tower (32) is provided with a second gas phase outlet (202), and the second gas phase outlet (202) is connected with a vacuum tail gas treatment device (52).
8. An acetylene tail gas treatment system according to any one of claims 1 to 7, characterized in that an acetylene gas outlet (01) at the top of the absorption tower (1) is connected with a gas inlet end of a first outer tower demister (111), a gas outlet end of the first outer tower demister (111) is connected with a tail gas torch treater (6), and a liquid outlet end of the first outer tower demister (111) is connected with a reflux liquid inlet (06) at the bottom of the absorption tower (1).
9. An acetylene tail gas treatment system according to any one of claims 1 to 7, characterized in that an acetylene gas outlet (01) at the top of the desorption tower (2) is connected with a gas inlet end of a second outer-tower demister (222), a gas outlet end of the second outer-tower demister (222) is connected with an acetylene product gas holder (7), and a liquid outlet end of the second outer-tower demister (222) is connected with a reflux liquid inlet (06) at the bottom of the desorption tower (2).
10. An acetylene tail gas treatment system according to any one of claims 1 to 7, characterized in that the organic solvent outlet (04) at the bottom of the absorption tower (1) is connected with the organic solvent inlet (02) on the desorption tower (2) through a pipeline with a solvent pump; the organic solvent outlet (04) at the bottom of the desorption tower (2) is respectively connected with the organic solvent inlet (02) of the atmospheric degassing tower (31) and the organic solvent inlet (02) of the solvent storage tower (33) through a pipeline with a solvent pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222054738.9U CN218047236U (en) | 2022-08-05 | 2022-08-05 | Acetylene tail gas treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222054738.9U CN218047236U (en) | 2022-08-05 | 2022-08-05 | Acetylene tail gas treatment system |
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| CN218047236U true CN218047236U (en) | 2022-12-16 |
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| CN202222054738.9U Active CN218047236U (en) | 2022-08-05 | 2022-08-05 | Acetylene tail gas treatment system |
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