CN110115929A - A kind of sulfur recovery facility sour gas alkali washing process - Google Patents
A kind of sulfur recovery facility sour gas alkali washing process Download PDFInfo
- Publication number
- CN110115929A CN110115929A CN201810110776.7A CN201810110776A CN110115929A CN 110115929 A CN110115929 A CN 110115929A CN 201810110776 A CN201810110776 A CN 201810110776A CN 110115929 A CN110115929 A CN 110115929A
- Authority
- CN
- China
- Prior art keywords
- tower
- recovery facility
- sulfur recovery
- washing process
- alkali washing
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of alkali washing process of sulfur recovery facility acid tail gas, first spray acid tail gas using recirculated water, so that its temperature is down to 60 DEG C or so and (be appropriate for SO2The temperature range of absorption) after, then pass through the SO in sodium hydroxide solution and sour gas2Equal ingredients react, to reduce SO in tail gas2Content, so that it is met the requirement of qualified discharge.The present invention has the advantages of desulfuration efficiency is high, and water consumption is low, and liquid wastes generally not will cause secondary pollution less.
Description
Technical field
The invention belongs to petrochemical industries, and in particular to sulfur recovery facility incinerator emission desulphurisation treater
Skill.
Background technique
With the development of society, problem of environmental pollution has become the restraining factors of rapid economic development, industrially developed country
It is very strict to sulphur emissions, American National Environmental Protection Agency rules and regulations petroleum refining industry flue gas of heating furnace, sulfur recovery facility tail
Gas and regeneration fume from catalytic cracking discharge SO2Concentration limit is about in 100mg/m3Left and right.It is domestic at present territorial development density
Higher, environmental bearing capacity starts to weaken or atmospheric environment capacity is smaller, ecological environment frailty, is easy to happen serious atmospheric ring
Border pollution problem and the area for needing to take special protection measure, to sulfur recovery facility tail gas SO2Limit discharge capacity be≤
100mg/m3, even≤50mg/m3。
Currently, in the sulfur method of practical application, practical SO2Discharge amount can achieve≤100mg/m3, even≤
50mg/m3Most effective mode still need to realize by alkali wash.Lye absorbs the temperature of limitation compared with amine liquid class absorbent
Temperature it is higher, it is possible to reduce the energy loss of fast cool zone, and plant investment is lower.
Summary of the invention
The purpose of the present invention is developing a kind of sulfur recovery facility sour gas alkali washing process, sulfur recovery facility is both avoided
Exhaust emissions problem not up to standard, also reduces the cost of tail gas recycle.
The present invention cools down to the flue gas from upstream incinerator using recirculated water, cuts the amount and temperature control according to flue gas
The inflow needed is made, realization is while cool down to flue gas, so that the acid least amount of water of discharge, or even close to zero-emission
It puts.The flue gas for carrying out cooling enters back into caustic wash tower, by spray sodium hydroxide solution to the SO in sour gas2Equal ingredients carry out
Reactive absorption controls the PH of tower bottom, and suitably supplements fresh lye, to realize the internal row recycled and reduce salkali waste
It puts, while spent lye is delivered to sewage treatment plant after PH is controlled.
Technical process of the invention is as follows: in sulfur recovery facility, according to the exhaust gas volumn that incinerator generates, with matching
Quantity of circulating water chilling spray is carried out to flue gas so that flue gas is cooled to suitable temperature, about 60 DEG C or so, be most useful for
NaOH absorbs SO2Temperature range.Flue gas after cooled enters caustic wash tower from tower bottom, and NaOH solution counter current contacting, so that
SO2It is come into full contact with NaOH solution, it is 7 or so that tower bottom, which controls tower bottom liquid PH,.Optimized chilling tower tower bottom liquid measure is seldom,
It is sent together with caustic wash tower tower bottom liquid after increasing liquid to caustic wash tower tower bottom reflux pump, is divided into two-way by about 2kg/h or so: all the way with
The new lye of supplement is back to cyclic absorption sulfur dioxide in caustic wash tower together, is sent to salkali waste flow container all the way, during spent lye PH is
Property, sewage treatment plant, which can be sent to, after oxidation processes is handled.SO in caustic wash tower tower overhead gas2< 50ppm can pass through air inducing
Machine is directly from smoke stack emission to atmosphere.
Absorb SO2Absorbent be 18%(wt) NaOH solution.Lye is carried out in lye batch tank with postponing, and is passed through
It is pumped to 18% alkali liquid tank, is being pumped to alkali cleaning column overhead by lye.
At 62 DEG C or so, tower bottom liquid is controlled in 2kg/h or so the control of chilling column overhead temperatures.
At 70 DEG C or so, tower bottom liquid controls PH and is slightly larger than 7 caustic wash tower temperature.
Since the flue gas pressures come out from incinerator are tiny structure, an air-introduced machine need to be increased, pressurization 5kpa makes
Purified flue gas drains into atmosphere from chimney.
SO2 is absorbed using 18%NaOH solution, is reacted as follows:
2NaOH + SO2=Na2SO3 + H2O
When NaOH deficiency, react as follows:
Na2SO3+SO2+H2O=2NaHSO3。
Process of the present invention simple process, process is short, easy to operate, economical rationality, energy consumption are lower.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
It is as follows to represent meaning for each number in figure: 1: chimney；2: chilling tower；3: pressure difference transmitter；4: Liquid level；5: drawing
Blower；6: caustic wash tower；7: pressure difference transmitter；8: Liquid level；9: analysis meter；10: Liquid level；11: liquidometer；12: alkali
Liquid batch tank；13: lye delivery pump；14: alkali liquid tank；15: lye pump；16: NaOH solution circulating pump；17: salkali waste tank；18: salkali waste pump.
Specific embodiment
The present invention solves sulphur recovery in most cases by providing a kind of sulfur recovery facility sour gas alkali washing process
Device exhaust discharges SO2The case where need≤100ppm, reduces seriously polluted problem.Optimal control of the present invention chilling tower tower bottom is useless
The salkali waste liquid measure that water and caustic wash tower tower bottom generate, reduces the discharge of spent lye, effectively reduces plant investment and operation cost.
Solve the above problems, main thought of the invention is: the embodiment of the present invention is according to the original of vapor latent heat and sensible heat
Reason, can control most of water of feeding chilling tower will be down to 60 from the flue-gas temperature that incinerator comes out while becoming vapor
DEG C or so, and only there are about 2kg/h for the liquid that tower bottom comes out.For caustic wash tower, NaOH absorbs SO2Optimum temperature be also 60 DEG C of left sides
It is right.Not only reduce the consumption of water and the yield of waste water in this way, but also is in SO2The optimum state of absorption.Caustic wash tower tower bottom
Tower bottom liquid pH value is analyzed by analysis meter, supplement lye amount is adjusted, so that the PH of circulation alkali liquor makes assimilation effect best.Separately
Outer control tower bottom liquid PH makes waste water be in neutral and is handled convenient for sending to sewage treatment plant.
The equipment that sulfur removal technology of the embodiment of the present invention includes has: chilling tower (including gas inlet, outlet, circulation water inlet,
Outlet), caustic wash tower (including cooled flue gas entrance, outlet, circulation alkali liquor entrance, spent lye outlet), air-introduced machine, chimney, lye
Configured slot, alkali liquid tank, salkali waste tank, lye delivery pump, lye pump and NaOH solution circulating pump.
The present invention is applicable not only to newly-built sulfur recovery facility (SO2Emission request is stringent), it applies also for according to original
The sulfur recovery facility of the need transformation of normative construction.Construction cost of the present invention is low, and sulfur dioxide absorption effect is obvious, convenient for behaviour
Make, can easily be accommodated.
In order to which above and other purpose, feature and the advantage of the present invention can be clearer and more comprehensible, special embodiment below is come
Illustrate sulfur recovery facility tail gas treatment process of the present invention.
Embodiment
The following are the relevant parameters of sulfur recovery facility incinerator emission:
Tail gas is sent into chilling tower, chilling tower operating condition is as follows:
Tail gas after cooling is sent into caustic wash tower, and caustic wash tower operating condition is as follows:
Compared with existing alkaline cleaner and other devices, the cooling temperature of the process unit is controlled at 60 ~ 70 DEG C, is steamed according to water
The physical property of gas, so that the acid water generated is less, and cooling flue-gas temperature is also appropriate for lye absorption.By excellent
After change, temperature control, PH control etc., the lye amount of caustic wash tower is also controlled in most economical range.
Present invention process process is simple, and controllability is strong, and vent gas treatment effect is good, is not necessarily to special installation, raw material, and generate
Acid water and salkali waste liquid measure it is less, waste water control is in neutrality convenient for sending to sewage treatment plant.With SO in the future2Discharge amount requirement
Increasingly tighter, which is also able to satisfy emission request.
Claims (13)
1. a kind of sulfur recovery facility sour gas alkali washing process, it is characterised in that: in sulfur recovery facility, produced according to incinerator
Raw exhaust gas volumn carries out chilling spray to flue gas with the quantity of circulating water to match, as flue gas be cooled to suitable temperature.
2. the flue gas after cooled enters caustic wash tower from tower bottom, and NaOH solution counter current contacting, so that SO2It is abundant with NaOH solution
Contact, tower bottom control tower bottom liquid PH and are greater than 7.
3. optimized chilling tower tower bottom liquid measure is seldom, it is sent together with caustic wash tower tower bottom liquid to caustic wash tower tower bottom and is flowed back
After pump increases liquid, it is divided into two-way: is sent to salkali waste flow container all the way, is back to recycle in caustic wash tower all the way together with the new lye of supplement and inhale
Receive sulfur dioxide.
4. SO in caustic wash tower tower overhead gas2≤ 100ppm, can be by air-introduced machine directly from smoke stack emission to atmosphere.
5. a kind of sulfur recovery facility sour gas alkali washing process according to claim 1, it is characterised in that the sour gas
Outlet of still tail gas is burned for the sulfur recovery facility.
6. a kind of sulfur recovery facility sour gas alkali washing process according to claim 1, it is characterised in that for cooling acid
The medium of property tail-gas is recirculated water.
7. a kind of sulfur recovery facility sour gas alkali washing process according to claim 1, it is characterised in that for absorbing acid
The absorbing liquid of property gas is NaOH solution.
8. a kind of sulfur recovery facility sour gas alkali washing process according to claim 1, it is characterised in that the tower of chilling tower
It pushes up temperature control and is conducive to NaOH solution at 60 ~ 70 DEG C, at a temperature of this and absorb SO2。
9. if desired lower temperature, the present invention can also meet demand, temperature range is up to 45 ~ 100 DEG C.
10. a kind of sulfur recovery facility sour gas alkali washing process according to claim 1, it is characterised in that chilling tower tower bottom
The acid water water of generation in 1 ~ 10kg/h, if tower top temperature need it is lower, tower bottom acidity water can according to require to increase to 1 ~
1500kg/h。
11. a kind of sulfur recovery facility sour gas alkali washing process according to claim 1, it is characterised in that caustic wash tower tower bottom
PH is controlled 7 ~ 8.
12. a kind of sulfur recovery facility sour gas alkali washing process according to claim 1, it is characterised in that caustic wash tower is logical
It crosses circulation alkali liquor and carries out acid aspiration.
13. a kind of sulfur recovery facility sour gas alkali washing process according to claim 1, it is characterised in that caustic wash tower outlet
Equipped with air-introduced machine, air-introduced machine 4 ~ 10kpa of boost range is discharged after pressurization from chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810110776.7A CN110115929A (en) | 2018-02-05 | 2018-02-05 | A kind of sulfur recovery facility sour gas alkali washing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810110776.7A CN110115929A (en) | 2018-02-05 | 2018-02-05 | A kind of sulfur recovery facility sour gas alkali washing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110115929A true CN110115929A (en) | 2019-08-13 |
Family
ID=67519250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810110776.7A Pending CN110115929A (en) | 2018-02-05 | 2018-02-05 | A kind of sulfur recovery facility sour gas alkali washing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110115929A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113877232A (en) * | 2020-07-02 | 2022-01-04 | 中国石油化工股份有限公司 | Method and system for treating aniline-containing gas |
| CN113941330A (en) * | 2020-07-15 | 2022-01-18 | 中国石油天然气股份有限公司 | Sulfur recovery catalyst and preparation method thereof |
| CN114602306A (en) * | 2022-03-22 | 2022-06-10 | 常熟宏智仓储有限公司 | Sulfur-containing waste gas treatment system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164666A (en) * | 2007-08-17 | 2008-04-23 | 中国神华能源股份有限公司 | Fume automatic ventilated spraying system for adsorption tower |
| CN203648375U (en) * | 2014-01-10 | 2014-06-18 | 天津仁德科技有限公司 | Sodium-method desulfurization system of FCC petroleum catalytic cracking unit |
| CN104555941A (en) * | 2015-01-19 | 2015-04-29 | 西安长庆科技工程有限责任公司 | Natural gas purification plant acid gas sulfur recovery system and method |
| CN105271132A (en) * | 2015-09-29 | 2016-01-27 | 山东三维石化工程股份有限公司 | SWSR-6 sulfur recovery technology and apparatus thereof |
-
2018
- 2018-02-05 CN CN201810110776.7A patent/CN110115929A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164666A (en) * | 2007-08-17 | 2008-04-23 | 中国神华能源股份有限公司 | Fume automatic ventilated spraying system for adsorption tower |
| CN203648375U (en) * | 2014-01-10 | 2014-06-18 | 天津仁德科技有限公司 | Sodium-method desulfurization system of FCC petroleum catalytic cracking unit |
| CN104555941A (en) * | 2015-01-19 | 2015-04-29 | 西安长庆科技工程有限责任公司 | Natural gas purification plant acid gas sulfur recovery system and method |
| CN105271132A (en) * | 2015-09-29 | 2016-01-27 | 山东三维石化工程股份有限公司 | SWSR-6 sulfur recovery technology and apparatus thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113877232A (en) * | 2020-07-02 | 2022-01-04 | 中国石油化工股份有限公司 | Method and system for treating aniline-containing gas |
| CN113877232B (en) * | 2020-07-02 | 2024-01-26 | 中国石油化工股份有限公司 | Treatment method and system for aniline-containing gas |
| CN113941330A (en) * | 2020-07-15 | 2022-01-18 | 中国石油天然气股份有限公司 | Sulfur recovery catalyst and preparation method thereof |
| CN114602306A (en) * | 2022-03-22 | 2022-06-10 | 常熟宏智仓储有限公司 | Sulfur-containing waste gas treatment system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102198365B (en) | Processing method of acid gas | |
| CN203781842U (en) | New sulfur recovery device | |
| CN104548902B (en) | Acetylene gas purifier and technique thereof | |
| CN110115929A (en) | A kind of sulfur recovery facility sour gas alkali washing process | |
| CN110314505B (en) | Device and method for treating ammonia-containing tail gas in ammonium drying section in alkali industry | |
| CN107115779A (en) | A kind of method of exhuast gas desulfurization | |
| CN105195005A (en) | Dual-effect purification system for integrated treatment of coked fuel gas and ammonia containing wastewater | |
| CN106621768A (en) | Ammonia process of desulfurization integral purification device and method for acid gas sulfur recovery tail gas | |
| CN101301567B (en) | Process for removing contaminants from gas streams | |
| CN109331625A (en) | Vanadium trioxide restores tail gas purification tower | |
| CN104119946B (en) | A kind of catalytic cracking flue gas desulfurization and Acidic Gas Treating technique | |
| CN210826085U (en) | Blast furnace gas catalytic desulfurization device | |
| CN105148706A (en) | Energy conservation and emission reduction integral method for natural gas boilers | |
| CN111023076A (en) | Full-open type absorption heat pump for flue gas waste heat full-heat gradient depth recovery | |
| CN107673314A (en) | A kind of low concentration SO2One turn of two suction sulfuric acid preparation method of flue gas | |
| CN108050850A (en) | A kind of yellow phosphoric tail gas boiler flue gas purification system and purification method | |
| CN106586972B (en) | Energy-saving and environment-friendly low emission recovery technology of sulfur | |
| CN205145959U (en) | Coking flue gas and processing economic benefits and social benefits clean system that unifies including ammonia wastewater | |
| CN205392144U (en) | Vanadium slag calcination vent gas treatment system in | |
| CN108786397A (en) | A kind of processing method and system of Claus device exhausts | |
| CN104971601B (en) | Acid gas vertical reactor and processing method | |
| CN110591769A (en) | Blast furnace gas catalytic desulfurization device and method | |
| CN111135698A (en) | Sintering flue gas desulfurization, white removal and denitration comprehensive treatment system and process | |
| CN206823499U (en) | A kind of processing system of Claus device exhausts | |
| CN110252090A (en) | A method of sodium sulfite sulfur removal technology absorptive capacity and utilization rate are improved using triethanolamine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190813 |