CN108671701A - A kind of sulfur method of hydrogen sulfide containing gas - Google Patents
A kind of sulfur method of hydrogen sulfide containing gas Download PDFInfo
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- CN108671701A CN108671701A CN201810474584.4A CN201810474584A CN108671701A CN 108671701 A CN108671701 A CN 108671701A CN 201810474584 A CN201810474584 A CN 201810474584A CN 108671701 A CN108671701 A CN 108671701A
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- hydrogen sulfide
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- rich solution
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- 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
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
- B01D53/1468—Removing hydrogen sulfide
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- 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
- B01D53/14—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 by absorption
- B01D53/1425—Regeneration of liquid absorbents
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- 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
- B01D53/14—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 by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/204—Amines
- B01D2252/20405—Monoamines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
A kind of sulfur method of hydrogen sulfide containing gas, hydrogen sulfide containing gas is set to pass through scrubbing tower, rich solution is obtained with amine absorption hydrogen sulfide gas, rich solution is parsed in plate column by heating, the hydrogen sulfide gas parsed is burned, it is converted into sulfur dioxide, sulfur dioxide is absorbed by sodium hydroxide, and nontoxic sodium sulfite is converted into after being reacted；And the hydrogen sulfide in rich solution becomes lean solution after being resolved, lean solution can be again introduced into scrubbing tower after supplementing fresh amine, recycle.It using the present invention, converts the hydrogen sulfide in gas to sodium sulfite, can thoroughly handle sulfur-containing compound, non-secondary pollution, cost is relatively low, easy to operate, and wastewater treatment is thorough, and the COD value of waste water of discharge is less than 500mg/L.
Description
Technical field
The invention belongs to the process fields of sulfurous gas, and in particular to a kind of sulfur method of hydrogen sulfide containing gas.
Background technology
Propylene is a kind of important basic organic chemical raw material, is mainly used to produce polypropylene, acrylic acid, octyl alconyl, third
Alkene nitrile, phenol, acetone etc..It is increasingly becoming the weight that numerous chemical enterprises obtain propylene feedstocks using dehydrogenating propane production propylene
Want approach.
In preparing propylene by dehydrogenating propane technique, often adds dimethyl disulfide (DMDS) and be used as quasi- burnt agent, it is anti-to reduce
Answer the coking degree in device, heating furnace.By pyroreaction, in dehydrogenation reactor, dimethyl disulfide is completely converted into sulphur
Change hydrogen, enters downstream process together with products of dehydrogenation reactions (propylene, propane, hydrogen, ethane, methane etc.).
Currently, in preparing propylene by dehydrogenating propane technique, the adsorption tanks that desulfuration adsorbent is housed often are used, it first will be anti-
The hydrogen sulfide adsorption in product is answered to get off.Then, using high temperature dry gas as regeneration gas, the hydrogen sulfide in adsorbent is parsed,
But hydrogen sulfide treatment is not thorough, and desulfuration adsorbent easy tos produce the residue contaminations such as dust.
In the prior art, to also there is the method using biological treatment or catalysis oxidation in the processing of hydrogen sulfide containing gas,
Convert hydrogen sulfide to solid S, still, biological treatment is complicated, technological temperature higher, used catalysis when catalysis oxidation
Agent is expensive, and the replacement cycle is short, and processing cost is high, complex process；And convert hydrogen sulfide to vulcanized sodium using sodium hydroxide
And NaHS, secondary pollution can be caused, need to be further processed, complex process.
Invention content
The purpose of the present invention is to provide a kind of sulfur methods of hydrogen sulfide containing gas, and the hydrogen sulfide in gas is converted
For sodium sulfite, sulfur-containing compound can be thoroughly handled, non-secondary pollution, cost is relatively low, easy to operate, and wastewater treatment is thorough, row
The COD value of waste water put is less than 500mg/L.
In order to achieve the above object, the present invention provides the following technical solutions：
A kind of sulfur method of hydrogen sulfide containing gas, includes the following steps：
1) under room temperature, the gas containing hydrogen sulfide enters scrubbing tower, is contacted with the amine liquid in scrubbing tower, vulcanization therein
Hydrogen becomes rich solution, pH 12-14 by amine absorption, and rich solution is discharged from scrubbing tower tower reactor；Residual gas is after desalted water from washing
Wash tower top discharge；
2) rich solution enters in plate column, and in plate column, rich solution is parsed by heating, after parsing hydrogen sulfide gas
Rich solution becomes lean solution, pH 9-11, and lean solution is discharged from tower reactor；The hydrogen sulfide gas parsed is discharged from tower top, after condensation
Into return tank；
3) hydrogen sulfide gas in return tank enters incinerator and is burned, and is converted into sulfur dioxide；
4) enter caustic wash tower after sulfur dioxide cooling, in caustic wash tower, sulfur dioxide is reacted with sodium hydroxide solution, conversion
For sodium sulfite, discharged after waste water, exhaust gas are up to standard.
Further, in the step 1), the amine liquid in scrubbing tower is that the methyl diethanolamine that mass fraction is 5-10% is molten
Liquid.
Also, in step 1), the scrubbing tower is two layers of packed tower.
Preferably, in step 1), the amine liquid is divided into two-way, is entered in scrubbing tower by the distributor arranged in opposite directions
Packing layer.
Further, in step 1), the rich solution of tower reactor discharge enters rich solution storage tank, enters back into plate column., new for preparing
Fresh amine liquid
Also, in step 2), in plate column, when being parsed to rich solution, pass through electric tracing, steam tracing or the cold and hot friendship of material
Swap-in row heats.
Preferably, in step 2), lean solution is discharged from tower reactor, and amine liquid storage tank is entered after condensation, after supplementing fresh amine, leads to
It crosses circulating pump and enters scrubbing tower.
Further, in step 3), residual amine liquid and water in return tank enter plate column by pipeline and are parsed.
Preferably, in step 4), a concentration of 2-3 ω t.% of the sodium hydroxide solution.
In the present invention, hydrogen sulfide containing gas is made to pass through scrubbing tower, rich solution is obtained with amine absorption hydrogen sulfide gas, it will be rich
Liquid is parsed in plate column by heating, and the hydrogen sulfide gas parsed is burned, sulfur dioxide, dioxy are converted into
Change sulphur to absorb by sodium hydroxide, is reacted, be further converted to nontoxic sodium sulfite；And the hydrogen sulfide in rich solution
Become lean solution after resolved, lean solution can be again introduced into scrubbing tower after supplementing fresh amine, recycle.
Compared with prior art, the present invention has the advantages that：
Using the sulfur method of the present invention, the hydrogen sulfide in hydrogen sulfide containing gas can be made to be eventually converted into sulfurous acid
Sodium, is not necessarily to after-treatment, and the exhaust gas waste water discharged can up to standard, H2The COD value of S≤0.33kg/h, waste water are less than 500mg/
L, and cost of investment is relatively low, operating cost is relatively low, processing is thorough.
Description of the drawings
Fig. 1 is the process flow chart in the embodiment of the present invention.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiment
Referring to Fig. 1, the dry gas containing hydrogen sulfide from preparing propylene by dehydrogenating propane technique middle and upper reaches technique knockout drum is (main
Contain hydrogen, methane and hydrogen sulfide gas), 1 lower part of scrubbing tower is entered under room temperature, desalted water enters scrubbing tower 1 through circulating pump,
It is recycled in upper layer filler 101, the lower layer that amine liquid enters scrubbing tower 1 by the redistributor 102 and 102' arranged in opposite directions fills out
Material 103, contacts with the hydrogen sulfide containing dry gas of rising, absorbs hydrogen sulfide gas therein, becomes rich solution, and pH 12-14 are remaining
Dry gas (hydrogen and methane) after desalination water washing, from tower top be discharged；Rich solution is discharged from tower reactor, enters through amine liquid circulating pump 2
Rich solution storage tank 3.Wherein, two-way pipeline is connect on amine liquid circulating pump 2, is used for cycle of the amine liquid in scrubbing tower 1 all the way, is used for all the way
Rich solution is delivered to amine liquid storage tank 3, is switched over by valve between two-way pipeline.
Rich solution in rich solution storage tank 3 enters plate column 5 by rich solution feed pump, is added by the reboiler 6 outside plate column 5
Heat, rich solution parse hydrogen sulfide gas, become lean solution, pH 9-11, and lean solution is delivered to amine after cooler cools down by delivery pump
Liquid storage tank 4 is delivered to amine liquid circulating system through delivery pump, returns in scrubbing tower 1, follow after supplementing fresh amine into amine liquid storage tank 4
Ring uses；The hydrogen sulfide gas parsed is discharged from 5 tower top of plate column, and return tank 7 is entered after overhead condenser condenses,
In, 7 peripheral hardware reflux pump of return tank sends the residual amine liquid in return tank 7 in plate column 5 by pipeline back to.
Hydrogen sulfide gas in return tank 7 enters hydrogen sulfide incinerator 8 and is burned, and sulfur dioxide is converted into, through cooling
Enter caustic wash tower 9 after device cooling, in caustic wash tower 9, sulfur dioxide is reacted with 2.5wt.% sodium hydroxide solutions, is generated sub-
Sodium sulphate is discharged after exhaust gas is up to standard from tower top, H in exhaust gas2S≤0.33kg/h is emitted into greatly after air-introduced machine by chimney 10
Gas is discharged through NaOH solution circulating pump after wastewater to reach standard, and the COD value of waste water of discharge is less than 500mg/L.
Claims (9)
1. a kind of sulfur method of hydrogen sulfide containing gas, includes the following steps：
1) under room temperature, the gas containing hydrogen sulfide enters scrubbing tower, is contacted with the amine liquid in scrubbing tower, hydrogen sulfide is inhaled by amine liquid
It receives, amine liquid becomes rich solution, pH 12-14 after absorbing hydrogen sulfide, and rich solution is discharged from scrubbing tower tower reactor；Residual gas passes through desalted water
It is discharged afterwards from scrubber overhead；
2) rich solution enters in plate column, and in plate column, heating rich solution is parsed, parsed in rich solution after hydrogen sulfide gas at
For lean solution, pH 9-11, lean solution is discharged from tower reactor；The hydrogen sulfide gas parsed is discharged from tower top, enters back after condensation
Flow tank；
3) hydrogen sulfide gas in return tank enters incinerator and is burned, and is converted into sulfur dioxide；
4) enter caustic wash tower after sulfur dioxide cooling, in caustic wash tower, sulfur dioxide is reacted with sodium hydroxide solution, is converted into Asia
Sodium sulphate is discharged after waste water, exhaust gas are up to standard.
2. the sulfur method of hydrogen sulfide containing gas according to claim 1, which is characterized in that in step 1), described washes
It is two layers of packed tower to wash tower.
3. the sulfur method of hydrogen sulfide containing gas according to claim 2, which is characterized in that in step 1), the amine liquid
It is divided into two-way, the packing layer in scrubbing tower is entered by the distributor arranged in opposite directions.
4. the sulfur method of hydrogen sulfide containing gas according to claim 1, which is characterized in that in step 1), tower reactor discharge
Rich solution be introduced into rich solution storage tank, enter back into plate column.
5. the sulfur method of hydrogen sulfide containing gas according to claim 1, which is characterized in that in step 2), in plate column,
When being parsed to rich solution, heated by electric tracing, steam tracing or the cold and hot exchange of material.
6. according to the sulfur method of the hydrogen sulfide containing gas of claim 1 or 5, which is characterized in that in step 2), lean solution from
After tower reactor discharge, enters amine liquid storage tank by condensation, after supplementing fresh amine, scrubbing tower is entered by circulating pump.
7. the sulfur method of hydrogen sulfide containing gas according to claim 1, which is characterized in that in step 3), in return tank
Residual amine liquid and water plate column is entered by pipeline and is parsed.
8. according to the sulfur method of any one of the claim 1-7 hydrogen sulfide containing gases, which is characterized in that the step 1)
In, the amine liquid in scrubbing tower is the methyldiethanolamine solution or ethanolamine solutions that mass fraction is 5-10%.
9. according to the sulfur method of any one of the claim 1-7 hydrogen sulfide containing gases, which is characterized in that the step 4)
In, the mass fraction of the sodium hydroxide solution is 2-3wt.%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810474584.4A CN108671701A (en) | 2018-05-17 | 2018-05-17 | A kind of sulfur method of hydrogen sulfide containing gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810474584.4A CN108671701A (en) | 2018-05-17 | 2018-05-17 | A kind of sulfur method of hydrogen sulfide containing gas |
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| Publication Number | Publication Date |
|---|---|
| CN108671701A true CN108671701A (en) | 2018-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810474584.4A Pending CN108671701A (en) | 2018-05-17 | 2018-05-17 | A kind of sulfur method of hydrogen sulfide containing gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109289462A (en) * | 2018-11-05 | 2019-02-01 | 北京化工大学 | High gravity desulfurization system for the discharge of multi-state sulfurous gas |
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2018
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Patent Citations (6)
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| WO1995007750A1 (en) * | 1993-09-17 | 1995-03-23 | ABB Fläkt AB | Method and apparatus for absorbing hydrogen sulphide |
| CN101258218A (en) * | 2005-08-09 | 2008-09-03 | 埃克森美孚研究工程公司 | Tetraorganoammonium and tetraorganophosphonium salts for acid gas scrubbing process |
| CN101289632A (en) * | 2007-04-20 | 2008-10-22 | 宝山钢铁股份有限公司 | Process for removing H2S and HCN in coke oven gas |
| JP2013108108A (en) * | 2011-11-17 | 2013-06-06 | Mitsubishi Heavy Ind Ltd | Direct-reduced iron production system |
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| CN105293442A (en) * | 2014-06-06 | 2016-02-03 | 中国石油化工股份有限公司 | Method for decreasing flue gas SO2 emission concentration in sulphur apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109289462A (en) * | 2018-11-05 | 2019-02-01 | 北京化工大学 | High gravity desulfurization system for the discharge of multi-state sulfurous gas |
| CN109289462B (en) * | 2018-11-05 | 2021-06-08 | 北京化工大学 | Supergravity desulfurization system for multi-working-condition sulfur-containing gas emission |
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Application publication date: 20181019 |