CN205913977U - Oxygen bearing tail gas embrane method recovery unit of liquefied gas removal of mercaptans - Google Patents
Oxygen bearing tail gas embrane method recovery unit of liquefied gas removal of mercaptans Download PDFInfo
- Publication number
- CN205913977U CN205913977U CN201620796977.3U CN201620796977U CN205913977U CN 205913977 U CN205913977 U CN 205913977U CN 201620796977 U CN201620796977 U CN 201620796977U CN 205913977 U CN205913977 U CN 205913977U
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- CN
- China
- Prior art keywords
- absorption tower
- tail gas
- membrane separator
- mercaptans
- spray head
- 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.)
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Abstract
The utility model relates to an oxygen bearing tail gas embrane method recovery unit of liquefied gas removal of mercaptans. Its technical scheme is: the middle part on absorption tower is connected to the lower part of removal of mercaptans tail gas end go -between liquid compressor, the upper portion of ring liquid compressor, and the bottom on absorption tower is connected the rich solution and is returned the end, and the upper portion on absorption tower is equipped with vapour oil spraying and drenches the head, and vapour oil spraying drenches the head and connects petrol and supply with the end, the top junctional membrane separator on absorption tower, and the top of membrane separator is connected the secondary and is taken off the hydrocarbon device, and the upper portion of vacuum pump is connected in the left side of membrane separator, vapour oil spraying drench the head including three shower head. The beneficial effects of the utility model are that: reach the requirement of emission standard non -methane total hydrocarbon class concentration after the device handles, discharge in direct high altitude, reduces the pollution to the environment, and the system utilizes petrol as the sealed liquid of compressor and the absorbent on absorption tower, can not cause secondary pollution, and vapour oil spraying drenches the spraying of first spun and for fan -shaped, has saved petrol to the assimilation effect is good.
Description
Technical field
This utility model is related to a kind of LPG Desulfurization processing meanss, oxygen-containing particularly to a kind of liquid gas sweetening
Tail gas embrane method retracting device.
Background technology
Oil plant can produce the liquefied petroleum gas (lpg) of high added value in crude oil deep-processing process.Lpg is domestic gas
Important sources, lpg, in addition to containing acidic components such as hydrogen sulfide and carbon dioxide, also contains the organic sulfurs such as mercaptan, thioether.Especially
It is mercaptan therein, due to severe toxicity, has volatility, corrosivity and nauseating bad odor, environment is caused greatly pollute.
If lpg is not carried out with removal of mercaptans refine, it will pipeline and storage container are caused corrode, shortening device cycle of operation, more can lead
Cause the product quality such as downstream polypropylene and methyl tertiary butyl ether(MTBE) unqualified it is impossible to produce for following process.Petro-chemical corporation adopts
Liquid gas sweetening technique refines to lpg, and technique mainly includes removal of mercaptans and alkali liquor oxidized regeneration two parts.Removal of mercaptans work
Skill: pending liquefied gas enters mercaptan extractive reaction device and alkali liquor counter current contacting, completes removal of mercaptans;Remove big again through water elution
Device is gone out after part alkali liquor and free moisture.Alkali liquor oxidized regeneration technology: alkali liquor heats up and enters oxidizing tower bottom of towe, with air following current
Contact.Sodium mercaptides under catalyst action, and oxygen reaction, Partial Conversion generates sodium hydroxide and disulphide.Mixture from
Tower top goes out, and enters into disulphide knockout drum, completes gas-liquid separation, and tail gas enters and goes sulfur unit furnace to carry out at burning
Reason.Alkali liquor goes out from separation tank bottom, is pumped into extraction tower and recycles after cooling.From disulphide knockout drum and oxidizing tower out
Tail gas contains a lot of hydrocarbon components and the disulphide of volatilization, and other main components are nitrogen and unreacted oxygen.As
Due to containing oxygen when using for fuel gas, dangerous matter sources can be formed in operation fluctuation, and formed after burning in stove two
Sulfur oxide can form corrosion to boiler tube.
Content of the invention
The purpose of this utility model is aiming at the drawbacks described above of prior art presence, provides a kind of liquid gas sweetening to contain
Oxygen tail gas embrane method retracting device, reaches the requirement of discharge standard NMHC class concentration after process.
Its technical scheme is: include removal of mercaptans tail gas end, ring hydraulic compression machine, absorption tower, rich solution return terminal, membrane separator,
Vacuum pump, gas supply end, secondary de- hydrocarbon device, the bottom of removal of mercaptans tail gas end connection ring hydraulic compression machine, ring hydraulic compression machine
The middle part on top connection absorption tower, the bottom on absorption tower connects rich solution return terminal, and the top on absorption tower is provided with gasoline spray head, vapour
Oily spray head connects gas supply end, and the top on absorption tower connects membrane separator, and the top connecting secondary of membrane separator takes off hydrocarbon dress
Put, the left side of membrane separator connects the top of vacuum pump, the bottom of vacuum pump is connected to removal of mercaptans tail gas end and ring hydraulic compression machine
Between, described gasoline spray head includes being atomized seat, atomization lid, annular groove, liquid outlet, and the liquid outlet of atomization seat is provided with atomization lid,
It is provided with liquid outlet at the center of atomization lid, the periphery with liquid outlet as the center of circle is provided with annular groove.
Above-mentioned gasoline spray head is provided with three, and forms rounded projections arranged, and connecting pipeline passes through three electromagnetic valves respectively
It is connected on three gasoline spray heads, it is possible to achieve the control respectively to three gasoline spray heads.
The beneficial effects of the utility model are: this device reaches wanting of discharge standard NMHC class concentration after processing
Ask, direct high altitude discharge, reduce the pollution to environment, system is by the use of gasoline as the absorption of the sealing fluid of compressor and absorption tower
Agent, does not result in secondary pollution, and the gasoline after absorbing again returns to device and processes further, the spraying that gasoline spray head sprays
For sector, and three gasoline spray heads pass through three solenoid valve controls, realize flexibly spraying, so, save gasoline, reduce
Expense, and good absorbing effect.
Brief description
Accompanying drawing 1 is structural representation of the present utility model；
Accompanying drawing 2 is the structural representation of gasoline spray head；
Accompanying drawing 3 is the top view of three gasoline spray heads and connecting pipeline；
Upper in figure: removal of mercaptans tail gas end 1, ring hydraulic compression machine 2, absorption tower 3, rich solution return terminal 4, membrane separator 5, vacuum pump
6th, gas supply end 7, secondary de- hydrocarbon device 8, gasoline spray head 9, connecting pipeline 10, electromagnetic valve 11；Atomization seat 9.1, atomization lid
9.2nd, annular groove 9.3, liquid outlet 9.4.
Specific embodiment
In conjunction with accompanying drawing 1-3, the utility model will be further described:
This utility model includes removal of mercaptans tail gas end 1, ring hydraulic compression machine 2, absorption tower 3, rich solution return terminal 4, membrane separator
5th, vacuum pump 6, gas supply end 7, secondary de- hydrocarbon device 8, the bottom of removal of mercaptans tail gas end 1 connection ring hydraulic compression machine 2, ring hydraulic pressure
The middle part on the top connection absorption tower 3 of contracting machine 2, the bottom on absorption tower 3 connects rich solution return terminal 4, and the top on absorption tower 3 is provided with vapour
Oily spray head 9, gasoline spray head connects gas supply end 7, and the top on absorption tower 3 connects membrane separator 5, the top of membrane separator 5
Portion's connecting secondary takes off hydrocarbon device 8, and the left side of membrane separator 5 connects the top of vacuum pump 6, and the bottom of vacuum pump 6 is connected to desulfurization
Between alcohol tail gas end 1 and ring hydraulic compression machine 2, described gasoline spray head 9 include be atomized seat 9.1, atomization lid 9.2, annular groove 9.3,
Liquid outlet 9.4, the liquid outlet of atomization seat 9.1 is provided with atomization lid 9.2, goes out liquid what the center of atomization lid 9.2 was provided with cone shape
Hole 9.4, the periphery with liquid outlet 9.4 as the center of circle is provided with annular groove 9.3, and the section of the spraying that liquid outlet 9.4 sprays is sector structure,
As shown in the α of in figure, so, save gasoline, reduce expense, and good absorbing effect.
In addition, gasoline spray head 9 is provided with three, and form rounded projections arranged, connecting pipeline 10 passes through three electromagnetic valves 11
Be connected respectively on three gasoline spray heads 9, it is possible to achieve the control respectively to three gasoline spray heads, can fully open or
Person partially opens, and then flexible control, realizes more preferable assimilation effect.
Removal of mercaptans tail gas is forced into 0.23 MPa through ring hydraulic compression machine, and ring hydraulic compression machine provides vapour by gas supply end
Oil seal, forms non-contacting sealing ring, can eliminate the heat of gas compression generation, and the gas after compression is together entered with ring liquid
In the middle part of absorption tower, ring liquid can be separated with compressed gas in Ta Nei；Removal of mercaptans tail gas flow through from bottom to top in tower packing layer with
The gasoline counter current contacting spraying from top to bottom, the hydro carbons in tail gas and disulphide are absorbed in gasoline, form the oil of enrichment
Product, the oil product of enrichment returns rich solution return terminal under the effect of the pressure, and the gas after process enters membrance separation after tower top outflow
Device；Vacuum pump produces vacuum in the per-meate side of film, to improve the efficiency of membrance separation；Gaseous mixture split is become two strands by membrane separator,
Containing a small amount of hydro carbons and beneficiation of hydrocarbons.A small amount of hydro carbons enter secondary de- hydrocarbon device, hydro carbons is removed further, tail gas concentration meets
Discharge standard of air pollutants, direct high altitude discharge, secondary de- hydrocarbon device is parsed with vacuum pump, resolution gas and enrichment
Hydro carbons is recycled to ring hydraulic compression machine entrance in the lump, mixes with former removal of mercaptans tail gas, carries out above-mentioned circulation.
This device reaches the requirement of discharge standard NMHC class concentration, direct high altitude discharge after processing, reduce to ring
The pollution in border, system does not result in secondary pollution by the use of gasoline as the absorbent of the sealing fluid of compressor and absorption tower, and inhales
Gasoline after receipts again returns to device and processes further, and the spraying that gasoline spray head sprays is sector, so, saves gasoline,
Reduce expense, and good absorbing effect.
The above, be only preferred embodiment of the present utility model, and any those of ordinary skill in the art all may profit
With the technical scheme of above-mentioned elaboration, this utility model is changed or be revised as equivalent technical scheme.Therefore, foundation
Any simple modification or substitute equivalents that the technical solution of the utility model is carried out, belong to the greatest extent what this utility model claimed
Scope.
Claims (2)
1. the oxygen-containing tail gas embrane method retracting device of a kind of liquid gas sweetening, is characterized in that: includes removal of mercaptans tail gas end, ring hydraulic compression
Machine (2), absorption tower (3), rich solution return terminal (4), membrane separator (5), vacuum pump (6), gas supply end (7), secondary de- hydrocarbon dress
Put (8), the bottom of removal of mercaptans tail gas end (1) connection ring hydraulic compression machine (2), the top connection absorption tower (3) of ring hydraulic compression machine (2)
Middle part, the bottom of absorption tower (3) connects rich solution return terminal (4), and the top of absorption tower (3) is provided with gasoline spray head (9), gasoline
Spray head connects gas supply end (7), and the top of absorption tower (3) connects membrane separator (5), and the top of membrane separator (5) connects
Secondary de- hydrocarbon device (8), the left side of membrane separator (5) connects the top of vacuum pump (6), and the bottom of vacuum pump (6) is connected to de-
Between mercaptan tail gas end (1) and ring hydraulic compression machine (2), described gasoline spray head (9) includes atomization seat (9.1), atomization lid
(9.2), annular groove (9.3), liquid outlet (9.4), the liquid outlet of atomization seat (9.1) is provided with atomization lid (9.2), in atomization lid (9.2)
Center be provided with liquid outlet (9.4), the periphery with liquid outlet (9.4) as the center of circle is provided with annular groove (9.3).
2. the oxygen-containing tail gas embrane method retracting device of liquid gas sweetening according to claim 1, is characterized in that: described gasoline
Spray head (9) is provided with three, and forms rounded projections arranged, and connecting pipeline (10) is connected respectively to three by three electromagnetic valves (11)
On individual gasoline spray head (9), it is possible to achieve the control respectively to three gasoline spray heads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620796977.3U CN205913977U (en) | 2016-07-27 | 2016-07-27 | Oxygen bearing tail gas embrane method recovery unit of liquefied gas removal of mercaptans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620796977.3U CN205913977U (en) | 2016-07-27 | 2016-07-27 | Oxygen bearing tail gas embrane method recovery unit of liquefied gas removal of mercaptans |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205913977U true CN205913977U (en) | 2017-02-01 |
Family
ID=57873515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620796977.3U Expired - Fee Related CN205913977U (en) | 2016-07-27 | 2016-07-27 | Oxygen bearing tail gas embrane method recovery unit of liquefied gas removal of mercaptans |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205913977U (en) |
-
2016
- 2016-07-27 CN CN201620796977.3U patent/CN205913977U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170201 Termination date: 20200727 |