CN105080293B - Remove the device and method of organic sulfur in yellow phosphoric tail gas - Google Patents
Remove the device and method of organic sulfur in yellow phosphoric tail gas Download PDFInfo
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- CN105080293B CN105080293B CN201510527313.7A CN201510527313A CN105080293B CN 105080293 B CN105080293 B CN 105080293B CN 201510527313 A CN201510527313 A CN 201510527313A CN 105080293 B CN105080293 B CN 105080293B
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Abstract
The present invention relates to tail gas disposal technique fields, provide the device of organic sulfur in removing yellow phosphoric tail gas, including oil scrubber, regenerator and oil-poor storage tank, oil scrubber is equipped with inlet exhaust gas, oil-poor import, offgas outlet and oil rich outlet, regenerator is equipped with rich oil import, oil-poor outlet and organic sulfur outlet, oil-poor import is connected to oil-poor storage tank, and oil rich outlet and rich oil inlet communication, oil-poor outlet is connected to oil-poor storage tank.The present apparatus is simple in structure, at low cost, and removal efficiency is high.The method for additionally providing organic sulfur in removing yellow phosphoric tail gas, including：A, the organic sulfur in yellow phosphoric tail gas is absorbed using heavy aromatic solvent, obtains yellow phosphoric tail gas a and mixed solution b；B, the organic sulfur in flash separation mixed solution b, obtains organic sulfur and heavy aromatic solvent；C, the heavy aromatic solvent for obtaining step B is used for step A；D, step B and C are repeated.This method reuses heavy aromatic solvent, reduces cost；Merely with the physical property of organic sulfur, new impurity is avoided to generate.
Description
Technical field
The present invention relates to tail gas disposal technique field, the device of organic sulfur and side in especially a kind of removing yellow phosphoric tail gas
Method.
Background technology
Yellow phosphorus is the waxy solid of yellow, and matter is soft, not soluble in water, is slightly soluble in alcohol, is dissolved in liquid caustic soda, benzene, ether, chloroform, first
Benzene is soluble in carbon disulfide；It is a kind of important basic industries raw material, is mainly used for the multiple fields such as chemical industry, pesticide.
Currently, the production of yellow phosphorus is all using high temperature reduction method, raw material is rock phosphate in powder, silica and coke, by phosphorus when production
Ore, silica and coke put into electric furnace with granularity by a certain percentage, and the phosphorus of oxidation state is reduced into list in the case where spending high temperature 1000 more
Matter phosphorus steam, using product is obtained after cooling, rinsing, high temperature furnace slag is directly discharged from electric furnace, is discharged in production process
Gas is yellow phosphoric tail gas.
Phosphorus production industry belongs to highly energy-consuming, high pollution, high-risk industry, and the constituent of yellow phosphoric tail gas is sufficiently complex,
Predominantly carbon monoxide, accounts for about 80~92%, followed by hydrogen, oxygen, carbon dioxide, methane and small molecule hydro carbons, and about hundred
/ more than ten, pollutant component has hydrogen sulfide, sulphur carbonoxide, carbon disulfide, methyl mercaptan, hydrogen phosphide, hydrogen cyanide, elemental phosphorous and thin
Micro dust.Wherein, concentration of hydrogen sulfide about 15000~20000PPm, sulphur oxidation concentration of carbon about 2200~2500PPm, carbon disulfide
Concentration about 300~400PPm, phosphine concentration about 650~800PPm.Yellow phosphoric tail gas removing pollutant purification treatment technology be
Extremely complex and difficult, for yellow phosphoric tail gas desulfurization, the technology of depriving hydrogen sulphide is more ripe, has commercial Application, hydrogen sulfide
Removal efficiency can reach 90% or more.But the removing of sulphur carbonoxide and carbon disulfide, up to the present, there are no effective methods.
Invention content
Technical problem to be solved by the invention is to provide a kind of device and method of organic sulfur in removing yellow phosphoric tail gas, energy
Organic sulfur in enough effectively removing yellow phosphoric tail gas.
The technical solution adopted by the present invention to solve the technical problems is：Remove the device of organic sulfur in yellow phosphoric tail gas, packet
Oil scrubber, regenerator and oil-poor storage tank are included, the oil scrubber is provided with inlet exhaust gas, oil-poor import, offgas outlet and rich oil and goes out
Mouthful, the regenerator is provided with rich oil import, oil-poor outlet and organic sulfur outlet, the oil-poor import and passes through pipe with oil-poor storage tank
Road is connected to, and the oil rich outlet is connected to rich oil import by pipeline, and the oil-poor outlet is connected to oil-poor storage tank by pipeline.
Further, it is provided with organic sulfur liquid separation tank, the first import, first outlet are provided on the organic sulfur liquid separation tank
And refluxing opening, first import are communicated with the outlet of the organic sulfur of regenerator, the rich oil import phase of the refluxing opening and regenerator
It is logical.
Further, it is provided with adsorption tower, main pipe rail is imported and exports main pipe rail, the adsorption tower is provided with the 4th import
With the 5th outlet, the 4th import is communicated by importing main pipe rail with the offgas outlet of oil scrubber, and the described 5th exports and lead
Go out main pipe rail to be connected.
The adsorption tower be it is multiple, multiple adsorption towers be connected in parallel after reconnect import main pipe rail and export main pipe rail it
Between.
Further, the 4th import of each adsorption tower is provided with the first pipe communicated with importing main pipe rail, and the 5th goes out
Mouth is provided with the second pipe communicated with export main pipe rail；
It is provided with shunt conduit, described shunt conduit one end is the first connecting pin, and the other end is second connection end, described the
One connecting pin is connected with export main pipe rail, and second connection end is connected with second pipe；
The first valve, circulating fan and the second valve are disposed in the shunt conduit；
Third valve is provided on the second pipe, the third valve is set to second connection end and export main pipe rail
Between；
It is provided with the second liquid separation tank, the second liquid separation tank is provided with the second import, second outlet and liquid outlet, each
The third pipeline of connection first pipe and the second import, the third pipeline and the are provided in the first pipe of the adsorption tower
The connected one end of one pipeline is third connecting pin, and the second outlet is communicated with main pipe rail is exported, the liquid outlet with it is oil-poor
Storage tank communicates；
It is provided with the 4th valve on the third pipeline；
The 5th valve is provided in the first pipe, the 5th valve is set to third connecting pin and imports main pipe rail
Between.
The method for removing organic sulfur in yellow phosphoric tail gas, includes the following steps：
A, yellow phosphoric tail gas is passed through heavy aromatic solvent, heavy aromatic solvent sponges carbon disulfide and sulphur oxygen in yellow phosphoric tail gas
Change carbon, obtains the yellow phosphoric tail gas a and mixed solution b of removing organic sulfur；
B, the carbon disulfide and sulphur carbonoxide in flash separation mixed solution b obtains gaseous carbon disulfide and sulphur oxidation
Carbon products, the heavy aromatic solvent of liquid；
C, the heavy aromatic solvent obtained in step B is used for step A, carries out cyclic absorption；
D, step B and step C is repeated.
Further, the heavy aromatic solvent carried secretly in yellow phosphoric tail gas a is absorbed using adsorbent.
Further, the adsorbent uses activated carbon.
Further, freeze the obtained carbon disulfide of step B and sulphur oxidation carbon products to 46.5 DEG C~53 DEG C, isolate
The heavy aromatic solvent of liquid.
Further, organic sulfur is removed using the device of organic sulfur in above-mentioned removing yellow phosphoric tail gas.
The beneficial effects of the invention are as follows：The device of organic sulfur in yellow phosphoric tail gas is removed, injects suitable compounding in oil scrubber
Heavy aromatic hydrocarbon solvent as washing oil, then by yellow phosphoric tail gas be passed through washing oil in, organic sulfur sulphur carbonoxide and carbon disulfide are molten
Xie Yu washing oil, detaches from yellow phosphoric tail gas.The rich oil for absorbing organic sulfur is heated to be passed through regenerator after set temperature, and
The lower organic sulfur of flash separation boiling point in regenerator, to be re-converted into the rich oil containing organic sulfur without organic sulfur
It is oil-poor, be passed through oil-poor storage tank and reused.The present apparatus is removed using the physical property of organic sulfur, and principle is simple, pair sets
Standby requirement is low；Without chemical reaction in processing procedure, new pollutant not will produce, can prevent secondary pollution；And washing oil
It can reuse, consumption is low, reduces implementation cost.
The method for removing organic sulfur in yellow phosphoric tail gas：Organic sulfur carbon disulfide and sulphur carbonoxide are soluble in heavy aromatic solvent,
The removal efficiency of sulphur carbonoxide can reach 85%, and the removal efficiency of carbon disulfide can reach 99.5%.The boiling point of heavy aromatic solvent is high, and
The boiling point of carbon disulfide is about 46.5 DEG C, and the boiling point of sulphur carbonoxide is about subzero 50 DEG C, and therefore, being divided by the way of flash distillation will have
Machine sulphur and heavy aromatic solvent separation.Obtained heavy aromatic solvent can reuse, and reduce processing cost；Carbon disulfide and sulphur oxygen
Change carbon and can be used as raw materials for production, there is preferable economic benefit.This method whole process all of organic sulfur physical property,
Chemical change does not occur, new impurity is avoided to generate, it is therefore prevented that subsequent processing is convenient in the secondary pollution of yellow phosphoric tail gas；It protects simultaneously
The organic sulfur purity isolated has been demonstrate,proved, it is made to can be directly used for raw materials for production.
Description of the drawings
Fig. 1 is the flow diagram of the device of organic sulfur in present invention removing yellow phosphoric tail gas；
Reference numeral：1-oil scrubber；2-regenerators；3-oil-poor storage tanks；4-primary heaters；5-organic sulfur liquid separations
Tank；6-adsorption towers；7-first pipes；8-second pipes；9-shunt conduits；10-circulating fans；11-inlet exhaust gas；
12-oil-poor imports；13-offgas outlets；14-oil rich outlets；21-rich oil imports；22-oil-poor outlets；23-organic sulfurs go out
Mouthful；51-the first import；52-first outlets；53-refluxing openings；61-the four import；62-the five outlet；91-the first connects
Connect end；92-second connection ends；110-the first valve；120-the second valve；130-third valves；140-third pipelines；
141-third connecting pins；150-the four valve；160-the five valve；170-the second liquid separation tank；171-the second import；
172-second outlets；173-liquid outlets；180-secondary heaters；190-coolers；200-heat exchangers；210-import
Main pipe rail；220-export main pipe rails；230-the second cooler；240-the second heat exchanger；250-oil washes pump；251-thirds
Import；252-thirds export；253-the four outlet；260-rich oil pans；270-rich oils pump；280-oil-poor pumps.
Specific implementation mode
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1, in the removing yellow phosphoric tail gas of the present invention organic sulfur device, including oil scrubber 1, regenerator 2 and poor
Oil tank 3, the oil scrubber 1 are provided with inlet exhaust gas 11, oil-poor import 12, offgas outlet 13 and oil rich outlet 14, it is described again
Raw tower 2 is provided with rich oil import 21, oil-poor outlet 22 and organic sulfur outlet 23, and the oil-poor import 12 passes through with oil-poor storage tank 3
Pipeline is connected to, and the oil rich outlet 14 is connected to rich oil import 21 by pipeline, and the oil-poor outlet 22 passes through with oil-poor storage tank 3
Pipeline is connected to.
General absorption tower can be used in oil scrubber 1, and in order to make yellow phosphoric tail gas be come into full contact with washing oil, oil scrubber 1 is preferred
Using packed tower；Inlet exhaust gas 11 is set to the lower part of oil scrubber 1, for being passed through yellow phosphoric tail gas；Oil-poor import 12 is set to
The top of oil scrubber 1, oil-poor for being passed through, oil-poor is that can be used multiple without the low washing oil of organic sulfur or organic sulfur content
The heavy aromatic hydrocarbon solvent matched；Offgas outlet 13 is set to the top of oil scrubber 1, for the yellow phosphorus tail after removing organic sulfur to be discharged
Gas；Oil rich outlet 14 is set to the bottom of oil scrubber 1, and for rich oil to be discharged, rich oil is the washing oil after absorbing organic sulfur.Work
When making, yellow phosphoric tail gas is passed through oil scrubber 1 from the inlet exhaust gas 11 of 1 lower part of oil scrubber, meanwhile, by oil-poor from oil-poor storage tank 3
Extraction, and it is passed through oil scrubber 1 from oil-poor import 12.Yellow phosphoric tail gas flows up, and is inversely contacted on filler surface with oil-poor, wherein
Sulphur carbonoxide and the organic sulfurs such as carbon disulfide be dissolved in it is oil-poor in, to be detached from yellow phosphoric tail gas.Remove the Huang of organic sulfur
Phosphorus tail gas is discharged from offgas outlet 13, and the organic sulfur content index being discharged in tail gas passes through oil-poor inlet amount and oil-poor flowing velocity
Control is adjusted；Become rich oil after Poor oil absorbing organic sulfur, is discharged from oil rich outlet 14.
Packed tower both can be used in regenerator 2, and board-like valve tower can also be used, and is provided simultaneously with flash distillation, stripping, rectifying function.
Rich oil import 21 is set to the middle part or top of regenerator 2；Oil-poor outlet 22 is set to the bottom of regenerator 2；Organic sulfur exports
23 are set to the top of regenerator 2.It is passed through again from rich oil import 21 after the rich oil that is discharged from 1 oil rich outlet 14 of oil scrubber is pressurized
Pressure reducing valve is arranged in rich oil import 21 in raw tower 2, and the lower sulphur carbonoxide of boiling point and carbon disulfide are flashed from rich oil and released
Come, organic sulfur remains gaseous state, and 23 discharge is recycled from the outlet of the organic sulfur of regenerator 2.The rich oil of removing organic sulfur becomes poor
Oil, and from 22 discharge of oil-poor outlet, flow into oil-poor storage tank 3, reused.
The present apparatus, simple in structure, device requirement amount is few, and implementation condition is mild, and implementation cost is low；Merely with the object of organic sulfur
Rationality matter absorbs and removing, will not chemically react, therefore, not will produce new pollutant, prevent from bringing secondary pollution.It is former
Reason is simple, and treatment conditions are mild, the security risk for preventing high temperature and pressure from bringing.The equipment amount of demand is low, and washing oil can weigh
Multiple to utilize, consumption is few, is conducive to save processing cost.The heavy aromatics oil of compounding is to the sulphur carbonoxide and two sulphur in yellow phosphoric tail gas
Change carbon absorption performance is good, and organic sulfur removal is efficient, and the removal efficiency of sulphur carbonoxide and carbon disulfide respectively reaches 85% He
99.5% or more, the yellow phosphoric tail gas quality after removal of organic sulfur meets requirement.The sulphur carbonoxide that is removed from yellow phosphoric tail gas and
Carbon disulfide can be used for produce sulfur product or after simple separation as product it is for sale, realize Sulphur ressource change give up into
Treasured has preferable economic benefit.
The organic sulfur that flash separation goes out in regenerator 2 can carry a small amount of washing oil secretly, in order to improve the pure of organic sulfur
Degree is isolated and is recycled the washing oil of entrainment, avoids wasting, be provided with organic sulfur liquid separation tank 5, on the organic sulfur liquid separation tank 5
It is provided with the first import 51, first outlet 52 and refluxing opening 53, first import 51 and the organic sulfur of regenerator 2 export 23 phases
Logical, the refluxing opening 53 is communicated with the rich oil import 21 of regenerator 2.The organic sulfur isolated is dropped from 23 discharge of organic sulfur outlet
After temperature to suitable temperature, it is transported to organic sulfur liquid separation tank 5 through pipeline, and enter organic sulfur liquid separation tank 5 from the first import 51, it is organic
Sulphur content flow container 5 detaches the washing oil of liquid and gaseous organic sulfur, and gaseous organic sulfur is discharged from first outlet 52 and recycles, and
The washing oil of liquid is rich oil, is discharged from refluxing opening 53, reenters regenerator 2 and carries out desulfurization process.
Some washing oil can be carried secretly from the yellow phosphoric tail gas that oil scrubber 1 is discharged, in order to remove these washing oil, avoid washing
Oil becomes new impurity, is provided with adsorption tower 6, imports main pipe rail 210 and export main pipe rail 220, the adsorption tower 6 are provided with the
Four imports 61 and the 5th outlet 62,13 phase of offgas outlet that the 4th import 61 passes through importing main pipe rail 210 and oil scrubber 1
Logical, the 5th outlet 62 is connected with export main pipe rail 220.Two kinds of adsorbents are usually loaded in adsorption tower 6, one of which is
Primary sorbent is activated carbon, and another kind is additional adsorbents, is silica gel, aluminium oxide or molecular sieve.The yellow phosphorus of entrainment washing oil
Tail gas is passed through adsorption tower 6 after importing main pipe rail 210, from the 4th import 61, and washing oil is adsorbed by the adsorbent in adsorption tower 6
It absorbs, the yellow phosphoric tail gas without washing oil is again from 62 discharge of the 5th outlet.Adsorption tower 6 eliminate washing oil, avoid washing oil at
For new impurity, yellow phosphoric tail gas is facilitated to carry out subsequent processing.
Since the sorbent quantity that adsorption tower 6 loads is limited, when adsorbent washing oil reaches a certain amount of, absorption
Effect can weaken or disappear, it is necessary to replace adsorbent or carry out adsorbent reactivation, in order to ensure replacing adsorbent or being inhaled
When attached dose of regeneration, the continual operation of device, the adsorption tower 6 is multiple, and multiple adsorption towers 6 are reconnected after being connected in parallel and led
Enter between main pipe rail 210 and export main pipe rail 220.Yellow phosphoric tail gas is passed through an adsorption tower 6, when its uptake reaches saturation,
By valve transfer yellow phosphoric tail gas glide path, yellow phosphoric tail gas is passed through to other adsorption tower 6.More adsorption towers 6 alternately absorb,
Ensure whole device continuous work, improves working efficiency.
Adsorbent is replaceable, still, replaces adsorbent and needs to dismantle adsorption tower 6, takes out old adsorbent, and load newly
Adsorbent, troublesome in poeration, repeated disassembled and assembled is also unfavorable for being used for a long time for adsorption tower 6.And purchase adsorbent needs certain cost,
It is therefore preferable that by the way of adsorbent reactivation, adsorption tower 6 is set to have absorption de-oiling function again, specifically, each adsorption tower
6 the 4th import 61 is provided with the first pipe 7 communicated with importing main pipe rail 210, and the 5th outlet 62 is provided with and export manifold
The second pipe 8 that road 220 communicates；It is provided with shunt conduit 9,9 one end of the shunt conduit is the first connecting pin 91, and the other end is
Second connection end 92, first connecting pin 91 are connected with export main pipe rail 220, and second connection end 92 is connected with second pipe 8
's；The first valve 110, circulating fan 10 and the second valve 120 are disposed in the shunt conduit 9；The second pipe 8
On be provided with third valve 130, the third valve 130 is set between second connection end 92 and export main pipe rail 220；Setting
There are the second liquid separation tank 170, the second liquid separation tank 170 to be provided with the second import 171, second outlet 172 and liquid outlet 173,
The third pipeline 140 of connection first pipe 7 and the second import 171, institute are provided in the first pipe 7 of each adsorption tower 6
It is third connecting pin 141, the second outlet 172 and export main pipe rail to state one end that third pipeline 140 is connected with first pipe 7
220 communicate, and the liquid outlet 173 is communicated with oil-poor storage tank 3；It is provided with the 4th valve 150 on the third pipeline 140；Institute
It states and is provided with the 5th valve 160 in first pipe 7, the 5th valve 160 is set to third connecting pin 141 and imports main pipe rail
Between 210.Adsorption tower 6 can be arranged 2-4, by taking 2 adsorption towers 6 as an example, First adsorption tower 6 first be used to carry out washing oil
Absorption absorbs, and when the adsorbent saturation in First adsorption tower 6, closes the 5th valve in the first pipe 7 communicated therewith
160, it prevents yellow phosphoric tail gas from continuing to be passed through, opens simultaneously the 5th valve in the first pipe 7 communicated with second adsorption tower 6
160, yellow phosphoric tail gas is passed through second adsorption tower 6, at this point, the adsorbent in First adsorption tower 6 is regenerated.When regeneration,
The third valve 130 on the second pipe 8 being connected with First adsorption tower 6 is closed, point communicated with First adsorption tower 6 is opened
The first valve 110 on flow tube road 9 and the second valve 120 are opened on the third pipeline 140 communicated with First adsorption tower 6
4th valve 150, then circulating fan 10 is opened, the yellow phosphoric tail gas in main pipe rail 220 will be exported and extracted, successively through the first connecting pin
91, the first valve 110, the pressurization of circulating fan 10, the second valve 120, second connection end 92, second pipe 8 enter First and inhale
Attached tower 6, the washing oil on adsorbent detach from adsorbent and enter in yellow phosphoric tail gas under the washing away of yellow phosphoric tail gas.Carrying is washed
The yellow phosphoric tail gas for washing oil enters the second liquid separation tank through first pipe 7, third connecting pin 141, third pipeline 140, the second import 171
170, the washing oil of liquid detaches in the second liquid separation tank 170 from yellow phosphoric tail gas, and is flowed out from liquid outlet 173, and entrance is poor
Oil tank 3 is recycled, and yellow phosphoric tail gas is discharged from second outlet 172, into export main pipe rail 220, can be used as regeneration
Gas circulation uses, and can also be expelled to other processing equipments.The reproduction speed of adsorbent is related with the flow velocity of yellow phosphoric tail gas, yellow phosphorus
The speed of tail gas is faster, and the reproduction speed of adsorbent is faster, and the speed of yellow phosphoric tail gas is controlled by circulating fan 10.First is inhaled
After the completion of the adsorbent reactivation of attached tower 6, each valve communicated with First adsorption tower 6 and circulating fan 10 are closed, suction is carried out
The preparation of attached washing oil.This structure can not only make adsorbent reactivation, additionally it is possible to recycle and reuse washing oil, avoid
Waste, further saves implementation cost.
Temperature is higher, and the kinetic energy of gas molecule is bigger, in order to accelerate the reproduction speed of adsorbent, improves regeneration efficiency, institute
It states and is provided with secondary heater 180 in shunt conduit 9, cooler 190 is provided on the third pipeline 140.By yellow phosphoric tail gas
After the heating of secondary heater 180, molecular motion is more violent, and after being reversely passed through adsorption tower 6, oil is washed to adsorbent surface
Souring power bigger, accelerate washing oil from adsorbent falling speed, improve regeneration efficiency.Cooler 190 will wash oil
It is cooled to suitable temperature with yellow phosphoric tail gas, convenient for gas-liquid separation in the second liquid separation tank 170.
For the thermal energy for making full use of secondary heater 180 to generate, the energy of secondary heater 180 and cooler 190 is reduced
Consumption, it is cost-effective, it is provided with heat exchanger 200 on the third pipeline 140 between the cooler 190 and first pipe 7, described the
Shunt conduit 9 between two heaters 180 and export main pipe rail 220 passes through the heat exchanger 200.By the yellow phosphorus of adsorption tower 6
Also contain a large amount of thermal energy in tail gas, then be passed into before cooler 190 freezed, with the yellow phosphoric tail gas that will be heated
It exchanges heat in heat exchanger 200, to make the yellow phosphoric tail gas temperature by adsorption tower 6 reduce, makes that the second heating will be entered
The yellow phosphoric tail gas temperature of device 180 increases, and takes full advantage of thermal energy, increases economic efficiency.
Primary heater 4 is provided on pipeline between the oil rich outlet 14 and rich oil import 21.Primary heater 4 is right
The rich oil that regenerator 2 will be entered is heated, and is reduced the solubility of volatile sulfur gases, is released part volatile sulfur gases；Together
When, the pressure in pipeline is increased, pressure difference when flash distillation is improved, reaches better flash evaporation effect, makes organic sulfur separation more
Thoroughly.It is higher from the oil-poor temperature of oil-poor 22 discharge of outlet of regenerator 2, and temperature is higher, gaseous state organic sulfur sulphur carbonoxide and two
The solubility of nitric sulfid is lower, is unfavorable for the absorption of organic sulfur, influences the removal efficiency of organic sulfur.Therefore, the oil-poor outlet 22
The second cooler 230 is provided on pipeline between oil-poor storage tank 3.Oil-poor freeze regenerator 2 is regenerated to suitable
After temperature, then it is passed through the storage of oil-poor storage tank 3, when it is recycled to oil scrubber 1, the absorption of sulphur carbonoxide and carbon disulfide can be made
More fully, removal efficiency is improved.
In order to reduce the energy consumption of primary heater 4 and the second cooler 230, second cooler 230 and oil-poor outlet
The second heat exchanger 240 is provided between 22, the pipeline between the oil rich outlet 14 and primary heater 4 is changed by described second
Hot device 240.The second heat exchanger 240 is first passed through from oil-poor 22 the oil-poor of discharge of outlet of regenerator 2, and primary heater will be passed through
4 rich oil exchanges heat, and to make oil-poor temperature reduce, then is passed through the second cooler 230 refrigeration, and the temperature liter of rich oil
Height, then be passed through the heating of primary heater 4, to make full use of thermal energy, reduces loss, reduces energy consumption, and improve heating or
Refrigerating efficiency.
It is provided with oil wash pump 250, the oil wash pump 250 is provided with third import 251, third outlet 252 and the 4th outlet
253, the third import 251 is communicated with oil rich outlet 14, third outlet 252 be provided with valve and with 12 phase of oil-poor import
Logical, the 4th outlet 253 is provided with valve and is communicated with rich oil import 21.The rich oil being discharged from 1 oil rich outlet 14 of oil scrubber
In, the organic sulfur of absorption is limited, not up to saturation state, therefore, can repeatedly be absorbed, make organic sulfur content therein i.e.
When being up to saturation, then it is passed through regenerator 2 and is regenerated.For oil wash pump 250 for extracting rich oil out from oil rich outlet 14, part is rich
Oil is by three outlets 252, after being mixed with oil-poor from oil-poor storage tank 3, reenters oil scrubber 1 from oil-poor import 12 and carries out weight
Receipts are relapsed, and part rich oil is sent into regenerator 2 by the 4th outlet 253, and third outlet 252 and the 4th outlet are controlled by valve
253 washing oil stream amount, to control the liquid level equilibrium of oil scrubber 1.
For the ease of controlling the liquid level equilibrium of regenerator 2 and oil scrubber 1, the installation of pipeline is facilitated to connect, the second heat exchanger
Rich oil pans 260, refluxing opening 53, the oil of organic sulfur liquid separation tank 5 are provided between 240 and the 4th outlet 253 of oil wash pump 250
The 4th outlet 253, the rich oil import 21 of regenerator 2 for washing pump 250 are communicated with rich oil pans 260.
For the ease of controlling the fluid flow rate in each pipeline, realization automation will be in oil-poor storage tank 3 using oil-poor pump 280
Oil-poor pump to oil scrubber 1；The rich oil in rich oil pans 260 is extracted using rich oil pump 270, after rich oil is largely heated
It is passed through regenerator 2 from rich oil import 21；Fraction is directly sent into regenerator 2 from the top of regenerator 2, to regulate and control temperature in tower,
Reduce the vapour pressure of washing oil.A small amount of rich oil is sent into the top of organic sulfur liquid separation tank 5 make leacheate use when necessary.
The method for removing organic sulfur in yellow phosphoric tail gas, includes the following steps：A, yellow phosphoric tail gas is passed through heavy aromatic solvent, weight
Aromatic solvent sponges carbon disulfide and sulphur carbonoxide in yellow phosphoric tail gas, obtains yellow phosphoric tail gas a and the mixing of removing organic sulfur
Solution b；B, the carbon disulfide and sulphur carbonoxide in flash separation mixed solution b, obtains gaseous carbon disulfide and sulphur carbonoxide
Product, the heavy aromatic solvent of liquid；C, the heavy aromatic solvent obtained in step B is used for step A, carries out cyclic absorption；D, again
Multiple step B and step C.
Heavy aromatic solvent is using the mixed xylenes and trimethylbenzene compounded.Organic sulfur carbon disulfide and sulphur carbonoxide are soluble in
The removal efficiency of heavy aromatic solvent, sulphur carbonoxide can reach 85%, and the removal efficiency of carbon disulfide can reach 99.5%.Heavy aromatic solvent
Boiling point it is high, and the boiling point of carbon disulfide is about 46.5 DEG C, and the boiling point of sulphur carbonoxide is about subzero 50 DEG C, therefore, using flash distillation
Mode point organic sulfur and heavy aromatic solvent are detached.Obtained heavy aromatic solvent can reuse, and reduce processing cost；Two
Nitric sulfid and sulphur carbonoxide can be used as raw materials for production, have preferable economic benefit.This method whole process is all of organic
The physical property of sulphur, does not occur chemical change, and new impurity is avoided to generate, it is therefore prevented that the secondary pollution of yellow phosphoric tail gas, after being convenient for
Continuous processing；It ensure that the organic sulfur purity isolated simultaneously, it made to can be directly used for raw materials for production.
Some heavy aromatic solvents can be carried when passing through heavy aromatic solvent due to yellow phosphoric tail gas secretly, it is molten in order to remove these heavy aromatics
Agent avoids it from becoming impurity new in yellow phosphoric tail gas, and the heavy aromatic solvent carried secretly in yellow phosphoric tail gas a is absorbed using adsorbent.It inhales
Attached dose can be used silica gel, aluminium oxide or molecular sieve etc., it is preferred that the adsorbent uses activated carbon.It is charcoal-stripped strong, it inhales
Attached effect is good, and chemical property and physical property are stablized, and at low cost.
When carrying out flash separation, part heavy aromatic solvent can become flash-off steam, be blended in carbon disulfide and sulphur oxidation
In carbon gas, in order to ensure that carbon disulfide and sulphur aoxidize the purity of carbon products, to the obtained carbon disulfide of step B and sulphur carbonoxide
Product freezes to 46.5 DEG C~53 DEG C, isolates the heavy aromatic solvent of liquid.Heavy aromatic solvent boiling point is higher than 140 DEG C, when to two
Nitric sulfid and sulphur oxidation carbon products are when freezing to 46.5 DEG C~53 DEG C, and heavy aromatic solvent condenses into liquid, and carbon disulfide and sulphur
Carbonoxide is gaseous state, to detach carbon disulfide and sulphur oxidation carbon products with heavy aromatic solvent.It can be again by carbon disulfide and sulphur
Oxidation carbon products are passed through except liquid equipment, are further separated out heavy aromatic solvent, improve the purity of carbon disulfide and sulphur carbonoxide.
Claims (7)
1. removing the device of organic sulfur in yellow phosphoric tail gas, it is characterised in that：Including oil scrubber (1), regenerator (2) and oil-poor storage tank
(3), the oil scrubber (1) is provided with inlet exhaust gas (11), oil-poor import (12), offgas outlet (13) and oil rich outlet (14),
The regenerator (2) is provided with rich oil import (21), oil-poor outlet (22) and organic sulfur outlet (23), the oil-poor import (12)
It is connected to by pipeline with oil-poor storage tank (3), the oil rich outlet (14) is connected to rich oil import (21) by pipeline, described oil-poor
Outlet (22) is connected to oil-poor storage tank (3) by pipeline；
It is provided with adsorption tower (6), imports main pipe rail (210) and export main pipe rail (220), the adsorption tower (6) is provided with the 4th
Import (61) and the 5th outlet (62), the 4th import (61) are gone out by importing main pipe rail (210) and the tail gas of oil scrubber (1)
Mouth (13) communicates, and the 5th outlet (62) is connected with export main pipe rail (220)；
The adsorption tower (6) is multiple, and multiple adsorption towers (6) reconnect after being connected in parallel is importing main pipe rail (210) and export
Between main pipe rail (220)；
4th import (61) of each adsorption tower (6) is provided with the first pipe (7) communicated with importing main pipe rail (210), and the 5th
Outlet (62) is provided with the second pipe (8) communicated with export main pipe rail (220)；
It is provided with shunt conduit (9), described shunt conduit (9) one end is the first connecting pin (91), and the other end is second connection end
(92), first connecting pin (91) is connected with export main pipe rail (220), and second connection end (92) is connected with second pipe (8)
's；
The first valve (110), circulating fan (10) and the second valve (120) are disposed on the shunt conduit (9)；
Third valve (130) is provided on the second pipe (8), the third valve (130) is set to second connection end
(92) between export main pipe rail (220)；
It is provided with the second liquid separation tank (170), the second liquid separation tank (170) is provided with the second import (171), second outlet
(172) and liquid outlet (173), be provided in the first pipe (7) of each adsorption tower (6) connection first pipe (7) with
The third pipeline (140) of second import (171), one end that the third pipeline (140) is connected with first pipe (7) connect for third
End (141) is connect, the second outlet (172) communicates with export main pipe rail (220), the liquid outlet (173) and oil-poor storage tank
(3) it communicates；
It is provided with the 4th valve (150) on the third pipeline (140)；
The 5th valve (160) is provided on the first pipe (7), the 5th valve (160) is set to third connecting pin
(141) it and imports between main pipe rail (210).
2. removing the device of organic sulfur in yellow phosphoric tail gas as described in claim 1, it is characterised in that：It is provided with organic sulfur liquid separation
Tank (5), is provided with the first import (51), first outlet (52) and refluxing opening (53) on the organic sulfur liquid separation tank (5), and described
One import (51) is communicated with the organic sulfur of regenerator (2) outlet (23), the rich oil import of the refluxing opening (53) and regenerator (2)
(21) it communicates.
3. removing the device of organic sulfur in yellow phosphoric tail gas as claimed in claim 1 or 2, it is characterised in that：It is provided with oil wash pump
(250), oil wash pump (250) is provided with third import (251), third outlet (252) and the 4th exports (253), and described the
Triple feed inlet (251) is communicated with oil rich outlet (14), third outlet (252) be provided with valve and with oil-poor import (12) phase
Logical, the 4th outlet (253) is provided with valve and is communicated with rich oil import (21).
4. the method for removing organic sulfur in yellow phosphoric tail gas, which is characterized in that yellow using removing as claimed in claim 1,2 or 3
The device of organic sulfur removes organic sulfur in phosphorus tail gas, includes the following steps：
A, yellow phosphoric tail gas is passed through heavy aromatic solvent, heavy aromatic solvent sponges carbon disulfide and sulphur oxidation in yellow phosphoric tail gas
Carbon obtains the yellow phosphoric tail gas a and mixed solution b of removing organic sulfur；
B, the carbon disulfide and sulphur carbonoxide in flash separation mixed solution b obtains gaseous carbon disulfide and the production of sulphur carbonoxide
Product, the heavy aromatic solvent of liquid；Heavy aromatic solvent is passed through oil-poor storage tank (3) and is reused；
C, the heavy aromatic solvent obtained in step B is used for step A, carries out cyclic absorption；
D, step B and step C is repeated.
5. the method for removing organic sulfur in yellow phosphoric tail gas as claimed in claim 4, which is characterized in that utilize multiple absorption in parallel
Adsorbent in tower (6) absorbs the heavy aromatic solvent carried secretly in yellow phosphoric tail gas a.
6. the method for removing organic sulfur in yellow phosphoric tail gas as claimed in claim 5, which is characterized in that the adsorbent is using work
Property charcoal.
7. the method for organic sulfur in the removing yellow phosphoric tail gas as described in claim 4,5 or 6, which is characterized in that obtained to step B
Carbon disulfide and sulphur oxidation carbon products freeze to 46.5 DEG C~53 DEG C, isolate the heavy aromatic solvent of liquid.
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|---|---|---|---|
| CN201510527313.7A CN105080293B (en) | 2015-08-25 | 2015-08-25 | Remove the device and method of organic sulfur in yellow phosphoric tail gas |
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| CN101289162B (en) * | 2008-05-24 | 2011-01-12 | 孔庆然 | Process for producing hydrogen gas and carbon disulphide from hydrogen sulfide |
| CN101912718B (en) * | 2010-08-20 | 2012-05-23 | 重庆紫光化工股份有限公司 | Device and method for absorbing carbon disulfide in hydrogen sulfide gas by using solvent |
| CN204911164U (en) * | 2015-08-25 | 2015-12-30 | 成都德美工程技术有限公司 | Device of organic sulfur in desorption yellow phosphoric tail gas |
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