WO2020244802A1 - Verfahren und vorrichtung zur schwefelgewinnung - Google Patents
Verfahren und vorrichtung zur schwefelgewinnung Download PDFInfo
- Publication number
- WO2020244802A1 WO2020244802A1 PCT/EP2020/025234 EP2020025234W WO2020244802A1 WO 2020244802 A1 WO2020244802 A1 WO 2020244802A1 EP 2020025234 W EP2020025234 W EP 2020025234W WO 2020244802 A1 WO2020244802 A1 WO 2020244802A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acid gas
- water vapor
- hydrogen sulfide
- enriched
- gas
- 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.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
- C01B17/0404—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process
- C01B17/0413—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process characterised by the combustion step
- C01B17/0417—Combustion reactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/002—Avoiding undesirable reactions or side-effects, e.g. avoiding explosions, or improving the yield by suppressing side-reactions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/26—Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
- B01J4/002—Nozzle-type elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/001—Controlling catalytic processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
- C01B17/0404—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process
- C01B17/0408—Pretreatment of the hydrogen sulfide containing gases
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
- C01B17/05—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by wet processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/0053—Controlling multiple zones along the direction of flow, e.g. pre-heating and after-cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00121—Controlling the temperature by direct heating or cooling
- B01J2219/00123—Controlling the temperature by direct heating or cooling adding a temperature modifying medium to the reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00157—Controlling the temperature by means of a burner
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00159—Controlling the temperature controlling multiple zones along the direction of flow, e.g. pre-heating and after-cooling
Definitions
- the invention relates to a process for the production of sulfur, in which an acid gas enriched with water vapor is formed from an acid gas containing hydrogen sulfide by admixing water, which acid gas is introduced together with an oxygen-rich gas and air via a burner into a Claus reactor in order to under Formation of a flame into one in a Claus process
- the invention also relates to a device for producing sulfur which can be operated according to the method according to the invention.
- Main components hydrogen sulfide and carbon dioxide typically also other sulfur compounds such as mercaptans, COS or CS 2 as well as aromatic hydrocarbons, especially benzene, toluene and xylenes (BTX for short).
- sulfur compounds such as mercaptans, COS or CS 2 as well as aromatic hydrocarbons, especially benzene, toluene and xylenes (BTX for short).
- a device called SRU (Sulfur Recovery Unit) used for this type of sulfur recovery comprises a reactor (Claus reactor) which is divided into a thermal and a catalytic part.
- the thermal part essentially consists of a furnace (Claus furnace) into which the acid gas and an oxidizing agent containing oxygen, such as air, are introduced via a burner in order to react with one another to form a flame, with part of the hydrogen sulfide contained in the acid gas burns to sulfur dioxide.
- the thermal part of the Claus reactor is followed by the catalytic part consisting of two to three Claus stages, where the sulfur dioxide formed during combustion with hydrogen sulfide according to
- one third of the hydrogen sulfide used is converted into sulfur dioxide during combustion in the Claus furnace, which reacts completely with the remaining hydrogen sulfide in the catalytic part of the Claus reactor.
- a very small excess of hydrogen sulfide can also be set in order to prevent sulfate formation on the Claus catalyst.
- the sulfur formed is in elemental form in the effluent of the catalytic part of the Claus reactor in the gas phase, from which it is condensed out, in particular by cooling in the separating part of the SRU.
- the Claus furnace can use an oxygen-rich gas as
- Oxidizing agents are fed in, wherein an oxygen-rich gas is to be understood as a gas which has a higher oxygen content than atmospheric air; in the extreme case, the oxygen-rich gas is technically pure
- Oxygen consisting of at least 95% oxygen. Corresponding processes are known to experts as Claus processes with oxygen enrichment (English Oxygen Enrichment). Due to the increased amount of oxygen and the lower
- Inert gas ballasts allow these processes to convert more hydrogen sulfide per unit of time in the Claus furnace, and thus in the SRU, than when using atmospheric air.
- the object of the present invention is to provide a method of the generic type and a device for carrying it out, by means of which it is possible to obtain sulfur more effectively than is possible according to the prior art. In terms of the method, this object is achieved according to the invention in that a first part of the acid gas containing hydrogen sulfide is added to the with water
- Water vapor-enriched acid gas is mixed and then introduced together with the oxygen-rich gas into the inner region of the flame, while the remaining second part contains the hydrogen sulfide
- Sour gas is fed together with the air to the outside of the flame.
- the method according to the invention allows high temperatures to be generated in the flame core and the advantages described above, which result from the enrichment of water vapor in the acid gas, to be largely fully utilized. Because water is not added, the second part has the
- Sour gas containing hydrogen sulfide has a higher calorific value than the sour gas enriched with water vapor generated from the first part. This makes it possible to reach temperatures of more than 1,100 ° C in the jacket of the flame in spite of the nitrogen ballast introduced with the air, at which BTX contained in the acid gas is safely destroyed. At the same time, the flame jacket is cold enough to effectively protect the Claus reactor from the heat of the flame core.
- the first part of the first print is preferred
- Sour gas containing hydrogen sulfide is supplied to a steam jet pump known from the prior art for enrichment with water vapor, in which water vapor at a higher than the first pressure is used as the propellant medium.
- the sour gas is sucked in by the water vapor and mixed with it so that a substance mixture consisting of water and the acid gas containing hydrogen sulfide leaves the steam jet pump.
- the mixture of substances is fed to the burner either directly or after any water that may be present in liquid form as acid gas enriched with water vapor in order to be fed to the inner flame area.
- the invention also relates to a device for the extraction of sulfur, with a mixing device for the formation of an acid gas enriched with water vapor by adding water to an acid gas containing hydrogen sulphide, a Claus reactor with a burner, via which the water vapor
- Enriched acid gas can be introduced into the Claus reactor together with an oxygen-rich gas and air in order to be converted into an effluent comprising elemental sulfur with the formation of a flame in a Claus process, as well as a separation part for the separation of elemental sulfur from the effluent.
- the object is achieved in that the device comprises a separating device that allows the acid gas containing hydrogen sulfide to be separated into a first and a second part, of which the first can be introduced into the mixing device to form the acid gas enriched with water vapor , and the burner has at least four concentrically arranged supply channels, with the oxygen-rich gas via the innermost supply channel, the acid gas enriched with water vapor in the innermost supply channel next to it, the outermost supply channel air and the supply channel next to the outermost supply channel containing the second part of the acid gas containing hydrogen sulfide can be introduced into the reactor.
- the feed channels are preferably formed by straight tubes with a circular cross-section, the walls of which delimit the feed channels from one another.
- the diameter of one or more of the tubes can change along the longitudinal axis, so that, for example, one or more of the supply channels end in a nozzle on the reactor side.
- the separating device arranged upstream of the mixing device and connected to it and to the burner preferably comprises a branch pipe, for example designed as a Y-pipe or T-piece, to which one or more control elements connect, via which the proportion between the first and the second part of the hydrogen sulfide-containing acid gas is adjustable.
- a variant of the device according to the invention provides that the mixing device is designed with a mixing element.
- This mixing element to which the first part of the acid gas containing hydrogen sulfide and water can be fed, can consist, for example, of a pipe section whose cross section is constant or variable along its axis.
- the pipe section can be one or more static mixers included.
- the mixing element is as
- the mixing device can also comprise a phase separator arranged downstream of the mixing element, with which liquid water can be separated from the mixture of substances generated by the mixing element in order to obtain the acid gas enriched with water vapor.
- FIGS. 1 and 2 Two exemplary embodiments shown schematically in FIGS. 1 and 2.
- FIG. 1 shows an SRU with a Claus reactor, which is operated according to a preferred variant of the method according to the invention.
- FIG. 2 shows part of the head of a burner which can be operated according to the invention for the Claus reactor of an SRU.
- Figure 1 is a hydrogen sulfide-containing
- Sour gas 11 is separated into a first 12 and a second part 13 with the aid of the separating device T, of which the first 12 is mixed in the mixing device M with water 14 supplied in liquid or vapor form in order to obtain an acid gas 15 enriched with water vapor, which then Introduced into the Claus reactor R via the burner B and burned in the Claus furnace O with the formation of the core K of a flame F with an oxygen-rich gas 16, which is, for example, technically pure oxygen.
- Sour gas containing hydrogen sulfide 1 1 is also supplied to the Claus furnace O via the burner B and burned with air 17, the flame jacket A being created in which temperatures of more than 1,100 ° C. are reached due to the lack of water vapor, which is particularly safe Ensure BTX decomposition.
- the flame jacket A is cold enough to prevent damage to the Claus furnace O from the extreme heat of the flame core K.
- Hydrogen sulfide and sulfur dioxide are present in a ratio of 2: 1, is via line 18 the catalytic part D of the Claus reactor R supplied. Elemental sulfur 20 is separated off in separating section Z from the effluent 19 comprising elemental sulfur obtained here.
- the burner head shown in longitudinal section in FIG. 2 comprises the four concentrically arranged burner tubes O, H, G and L, each of which has a circular cross section and four which are open towards the reaction space R of the Claus furnace C
- Form feed channels 21, 22, 23 and 24 Form feed channels 21, 22, 23 and 24.
- an oxygen-rich gas can be introduced into the reaction space R via the innermost 21 and air can be introduced into the outermost supply channel 24.
- the oxygen-rich gas 21 mixes predominantly with the acid gas enriched with water vapor, which can be supplied via the next adjacent channel 22, in order to burn with this with the formation of the hot flame core K.
- Acid gas can be introduced into the reaction space R via the supply channel 23 next to it to the outermost channel 24, where it predominantly mixes with the air 24 and burns with it, the comparatively cold flame jacket A being formed.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020217039884A KR20220016479A (ko) | 2019-06-05 | 2020-05-20 | 황을 획득하기 위한 방법 및 장치 |
| CA3141922A CA3141922A1 (en) | 2019-06-05 | 2020-05-20 | Process and apparatus for obtaining sulfur |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019003985.8A DE102019003985A1 (de) | 2019-06-05 | 2019-06-05 | Verfahren und Vorrichtung zur Schwefelgewinnung |
| DE102019003985.8 | 2019-06-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020244802A1 true WO2020244802A1 (de) | 2020-12-10 |
Family
ID=70975835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2020/025234 Ceased WO2020244802A1 (de) | 2019-06-05 | 2020-05-20 | Verfahren und vorrichtung zur schwefelgewinnung |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20220016479A (de) |
| CA (1) | CA3141922A1 (de) |
| DE (1) | DE102019003985A1 (de) |
| WO (1) | WO2020244802A1 (de) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015176180A1 (en) | 2014-05-20 | 2015-11-26 | Elmo Nasato | Method and apparatus for sulfur recovery |
-
2019
- 2019-06-05 DE DE102019003985.8A patent/DE102019003985A1/de not_active Withdrawn
-
2020
- 2020-05-20 CA CA3141922A patent/CA3141922A1/en active Pending
- 2020-05-20 KR KR1020217039884A patent/KR20220016479A/ko not_active Withdrawn
- 2020-05-20 WO PCT/EP2020/025234 patent/WO2020244802A1/de not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015176180A1 (en) | 2014-05-20 | 2015-11-26 | Elmo Nasato | Method and apparatus for sulfur recovery |
Non-Patent Citations (2)
| Title |
|---|
| "Ullmann's Encyclopedia of Industrial Chemistry", vol. 35, 2012 |
| "Ullmann's encyclopedia of industrial chemistry, 7th edition", vol. 35, 2006, WILEY-VCH, Weinheim, ISBN: 3-527-32943-9, article 6: "The Claus Process (Sulfur)", pages: 17 - 31, XP009521958 * |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20220016479A (ko) | 2022-02-09 |
| CA3141922A1 (en) | 2020-12-10 |
| DE102019003985A1 (de) | 2020-12-10 |
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