The purifier of sulfur-bearing conversion gas
Technical field
The present invention relates to the purified treatment field of sulfur-bearing conversion gas, in particular to a kind of purification of sulfur-bearing conversion gas
Device.
Background technology
It is simply that sulfide therein, ammonia, carbon dioxide etc. will be removed, the purification of Coal Chemical Industry conversion gas is unfavorable for that postorder produces
Component, particularly to remove the sulfide that postorder is normally harmful to.Current purification technique has: nhd desulfurization and decarburization method, low temperature
Methyl alcohol washes method.
Nhd desulfurization and decarburization method: nhd desulfurization and decarburization method is to select a kind of NHD organic solvent ordered as nhd,
Solvability sulfide in gas and carbon dioxide being had using it, the sulfide in removing process gas and carbon dioxide,
Because in process gas, carbon dioxide content is high, nhd solvent solvability determines solvent internal circulating load larger, process fluid
The energy consumption of conveying is higher.
Low-temp methanol washes method: the low-temp methanol method of washing is to select methanol solvate, using it to sulfide in gas and titanium dioxide
The solvability that carbon has, the sulfide in removing process gas and carbon dioxide, due to carbon dioxide content height, first in process gas
The solvability of alcoholic solvent determines that solvent internal circulating load is larger, and the energy consumption that there is process fluid conveying is higher, furthermore by
During methanol purification degree require higher, complex process.
As can be seen here, existing nhd desulfurization and decarburization method, low-temp methanol wash method all can certain solvent loss and desulfurization effect
Rate is low, energy consumption is higher.Based on this it is necessary to provide a kind of low solvent loss, the purifier of efficient sulfur-bearing conversion gas.
Content of the invention
Present invention is primarily targeted at providing a kind of purifier of sulfur-bearing conversion gas, to solve sulfur-bearing in prior art
The problem that during desulfuration of shift gas, solvent loss is high, efficiency is low.
To achieve these goals, according to an aspect of the invention, it is provided a kind of purifier of sulfur-bearing conversion gas,
It includes desulfurizing tower, and desulfurizing tower is provided with liquid carbon dioxide import;Liquid carbon dioxide feeding mechanism, liquid carbon dioxide
Feeding mechanism is connected with liquid carbon dioxide import.
Further, desulfurizing tower is provided with sulfur-bearing conversion gas import, purifier also includes: extraneous cold supplements heat exchange
Device, with sulfur-bearing conversion gas inlet communication.
Further, desulfurizing tower is provided with sulfur-containing liquid outlet, sulfur-bearing conversion gas import and extraneous cold supplement heat exchange
First carbon dioxide heat exchange of flash evaporation device is additionally provided with the stream between device, the first carbon dioxide heat exchange of flash evaporation device is provided with
One import, the second import first outlet corresponding with the first import and the second outlet corresponding with the second import;Extraneous
Cold supplements and is provided with triple feed inlet and threeth outlet corresponding with triple feed inlet on heat exchanger;Wherein, the first import and
Three outlets are connected, and first outlet is connected with sulfur-bearing conversion gas import, and the second import is connected with sulfur-containing liquid outlet.
Further, desulfurizing tower is provided with desulfurized gas outlet, purifier also includes liquid CO 2 knockout drum, liquid
Sweet gas import is provided with body carbon dioxide separation tank, sweet gas import is connected with desulfurized gas outlet.
Further, liquid CO 2 knockout drum is provided with liquid CO 2 outlet, purifier also includes the
Two carbon dioxide heat exchange of flash evaporation devices, the second carbon dioxide heat exchange of flash evaporation device are provided with the 4th import, the 5th import is entered with the 4th
The 4th corresponding outlet of mouth and the corresponding with the 5th import the 5th outlet;Wherein, the 4th import and desulfurized gas outlet phase
Connection, the 4th outlet is connected with sweet gas import, and the 5th import is connected with liquid CO 2 outlet.
Further, liquid CO 2 outlet is connected with liquid carbon dioxide import.
Further, the stream between liquid CO 2 outlet and liquid carbon dioxide import is provided with delivery pump.
Further, the stream between delivery pump and liquid carbon dioxide import is provided with first flow regulating valve.
Further, the stream between the 5th import and liquid CO 2 outlet is provided with second flow regulating valve.
Further, purifier also includes cooling dewatering unit, and cooling dewatering unit is provided with de- moisture outlet, takes off
Moisture outlet is connected with triple feed inlet.
In above-mentioned purifier provided by the present invention, liquid carbon dioxide import is arranged on desulfurizing tower.Different from biography
System sulfur-bearing conversion gas introduce the scheme of third party's medium when purifying, using the purifier in the present invention, with liquid CO 2
Do absorbent, the sulfide in removing sulfur-bearing conversion gas.Liquid carbon dioxide, to sulfide, especially has good to hydrogen sulfide
Select absorbability, steam forces down, during operating, solvent consume is few, is a kind of comparatively ideal physical absorbent, is particularly suitable for coal
(oily) is raw material, the gas purification of the sulfur-bearing conversion gas such as higher synthesis gas of acid gas partial pressure.And adopt liquid carbon dioxide desulfurization
When energy consumption low, be a kind of purification method of low energy consumption.Sum it up, purifier provided by the present invention, solvent loss is low, energy
Consumption is low, desulfuration efficiency is high, is especially suitable for industrial large-scale application.
Brief description
The Figure of description constituting the part of the application is used for providing a further understanding of the present invention, and the present invention shows
Meaning property embodiment and its illustrate for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the schematic diagram according to the purifier of sulfur-bearing conversion gas in an embodiment of the present invention.
Wherein, above-mentioned accompanying drawing include the following drawings mark:
10th, desulfurizing tower;101st, sulfur-bearing conversion gas import;102nd, desulfurized gas outlet;103rd, liquid carbon dioxide import;104、
Sulfur-containing liquid exports;20th, extraneous cold supplements heat exchanger;30th, the first carbon dioxide heat exchange of flash evaporation device;40th, liquid CO 2
Knockout drum;50th, the second carbon dioxide heat exchange of flash evaporation device;60th, delivery pump;401st, first flow regulating valve;402nd, second flow is adjusted
Section valve.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Mutually combine.To describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As described by background technology, in prior art, during sulfur-bearing desulfuration of shift gas, have that solvent loss is high, efficiency is low
Problem.In order to solve this problem, the invention provides a kind of purifier of sulfur-bearing conversion gas, as shown in figure 1, it includes
Desulfurizing tower 10 and liquid carbon dioxide feeding mechanism (not shown), are wherein provided with containing liquid carbon dioxide on desulfurizing tower 10
Import 103;Liquid carbon dioxide feeding mechanism is connected with liquid carbon dioxide import 103.
In above-mentioned purifier provided by the present invention, liquid carbon dioxide import 103 is arranged on desulfurizing tower 10.Different
Introduce the scheme of third party's medium when traditional sulfur-bearing conversion gas purify, using the purifier in the present invention, with liquid dioxy
Change carbon and do absorbent, the sulfide in removing sulfur-bearing conversion gas.Liquid carbon dioxide, to sulfide, especially has good to hydrogen sulfide
Good selection absorbability, steam forces down, and during operating, solvent consume is few, is a kind of comparatively ideal physical absorbent, is particularly suitable for
With coal (oily) as raw material, the gas purification of the sulfur-bearing conversion gas such as higher synthesis gas of acid gas partial pressure.And adopt liquid carbon dioxide
During desulfurization, energy consumption is low, is a kind of purification method of low energy consumption.Sum it up, purifier provided by the present invention, solvent loss
Low, energy consumption is low, desulfuration efficiency is high, is especially suitable for industrial large-scale application.
In a kind of preferred embodiment, desulfurizing tower 10 is provided with sulfur-bearing conversion gas import 101, purifier also includes
Extraneous cold supplements heat exchanger 20, and it is connected with sulfur-bearing conversion gas import 101.This extraneous cold supplements heat exchanger 20 can be to containing
Sulphur conversion gas are lowered the temperature, to improve the desulfuration efficiency of later stage liquid carbon dioxide.
In a kind of preferred embodiment, desulfurizing tower 10 is provided with sulfur-containing liquid outlet 104, sulfur-bearing conversion gas import
It is additionally provided with the first carbon dioxide heat exchange of flash evaporation device the 30, the 1st on stream between 101 and the supplementary heat exchanger 20 of extraneous cold
Be provided with carbonoxide heat exchange of flash evaporation device 30 first import, the second import first outlet corresponding with the first import and with
The corresponding second outlet of second import;Extraneous cold supplements and is provided with triple feed inlet and relative with triple feed inlet on heat exchanger 20
The 3rd outlet answered;Wherein, the first import is connected with the 3rd outlet, and first outlet is connected with sulfur-bearing conversion gas import 101,
Second import is connected with sulfur-containing liquid outlet 104.This kind of set-up mode, exports 104 temperature out from sulfur-containing liquid relatively low
Sulfur-containing liquid carbon dioxide can further sulfur-bearing conversion gas be lowered the temperature, on the one hand further increase the desulfurization in later stage
Effect, on the other hand takes full advantage of the cold of liquid CO 2 (sulfur-containing liquid), can reducing energy consumption further, make desulfurization
Process more environmental protection.Additionally, form the carbon dioxide acidity pneumatic transmission of sulfur compound from second outlet sulfur-containing liquid out
Toward downstream treatment process.
In a kind of preferred embodiment, desulfurizing tower 10 is provided with desulfurized gas outlet 102, above-mentioned purifier also includes
Liquid CO 2 knockout drum 40, liquid CO 2 knockout drum 40 is provided with sweet gas import, sweet gas import and desulfurization
Gas outlet 102 is connected.
Setting liquid CO 2 knockout drum 40, the liquid that can will carry secretly from desulfurized gas outlet 102 sweet gas out
State carbon dioxide separation out, makes sweet gas be purified further, from the clean gas outlet of liquid CO 2 knockout drum 40
Discharge.
In a kind of preferred embodiment, liquid CO 2 knockout drum 40 is provided with liquid CO 2 outlet, on
State purifier and also include the second carbon dioxide heat exchange of flash evaporation device 50, the second carbon dioxide heat exchange of flash evaporation device 50 is provided with the 4th
Import, the 5th import fourth outlet corresponding with the 4th import and the corresponding with the 5th import the 5th outlet;Wherein,
4th import is connected with desulfurized gas outlet 102, and the 4th outlet is connected with sweet gas import, the 5th import and liquid titanium dioxide
Carbon outlet is connected.
Above-mentioned setting can be lowered the temperature further to the sweet gas out from desulfurized gas outlet 102, thus be conducive to into
One step improves the separation of later stage liquid carbon dioxide, so that gas is further purified.Meanwhile, using the 5th import and liquid
Body carbon dioxide outlet is connected, then be that the liquid CO 2 separating liquid CO 2 knockout drum 40 is transported to
Two carbon dioxide heat exchange of flash evaporation devices 50, flash vaporized and reclaim cold, form atmospheric carbon dioxide product.
In a kind of preferred embodiment, liquid CO 2 outlet is also connected with liquid carbon dioxide import 103.This
The liquid CO 2 that partially liq carbon dioxide separation tank 40 can be separated by sample setting is transported in desulfurizing tower 10
Row recycles, it is possible to increase the desulfuration efficiency of device, and saving energy consumption and solvent use.
A kind of stream in preferred embodiment, between liquid CO 2 outlet and liquid carbon dioxide import 103
On be provided with delivery pump 60.Delivery pump 60 can be carried out to the liquid CO 2 that liquid CO 2 knockout drum 40 is separated
Pressure-raising, to make it into desulfurizing tower 10.
In a kind of preferred embodiment, the stream between delivery pump 60 and liquid carbon dioxide import 103 is provided with
First flow regulating valve 401.
In a kind of preferred embodiment, the stream between the 5th import and liquid CO 2 outlet is provided with second
Flow control valve 402.Setting first flow regulating valve 401 and second flow regulating valve 402 can more effectively control sulfur-bearing to become
The desulfurized effect of ventilation.
In a kind of preferred embodiment, purifier also includes cooling dewatering unit, and cooling dewatering unit is provided with
De- moisture outlet, de- moisture outlet is connected with triple feed inlet.So arrange, be by sulfur-bearing conversion gas after lyophilization again
Enter follow-up desulfurization process, can be conducive to being further ensured that production to prevent the solidification of low temperature carbon dioxide hydrate
Carrying out.Specific cooling dewatering unit is referring to patent cn201510236855.9.
In actual mechanical process, the amount of liquid CO 2 is by the pressure of the sulfur-bearing conversion gas after chilled dehydration and fall
The degree of temperature determines;Liquid CO 2 flash process need to control under certain temperature, pressure, to prevent consolidating of carbon dioxide
Change, stop the carrying out producing, referring to patent cn2014104285005.
As can be seen from the above description, in above-mentioned purifier provided by the present invention, desulfurizing tower is arranged and contains
Sulphur conversion gas import, desulfurized gas outlet, liquid carbon dioxide import and sulfur-containing liquid outlet.Net different from traditional sulfur-bearing conversion gas
Introduce the scheme of third party's medium during change, using the purifier in the present invention, absorbent is done with liquid CO 2, removing contains
Sulfide in sulphur conversion gas.This purifier solvent loss is low, energy consumption is low, desulfuration efficiency is high, is especially suitable for industrial big
Sizable application.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.