CA1164187A - Method of purifying reaction products - Google Patents
Method of purifying reaction productsInfo
- Publication number
- CA1164187A CA1164187A CA000378438A CA378438A CA1164187A CA 1164187 A CA1164187 A CA 1164187A CA 000378438 A CA000378438 A CA 000378438A CA 378438 A CA378438 A CA 378438A CA 1164187 A CA1164187 A CA 1164187A
- Authority
- CA
- Canada
- Prior art keywords
- combustion
- cludes
- heat
- additives
- material flow
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/02—Use of additives to fuels or fires for particular purposes for reducing smoke development
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/003—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J7/00—Arrangement of devices for supplying chemicals to fire
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
TITLE OF THE INVENTION:
METHOD OF PURIFYING REACTION PRODUCTS
ABSTRACT OF THE DISCLOSER;
A method of purifying reaction products that result from flame combustion of high-calorie fuels containing contaminants, such as sulfur-, chlorine-, and fluorine-compounds. The purification includes the addition of additives in the combustion chamber for binding the contaminants. The temperature necessary for binding the noxious materials is maintained by giving off a portion of the heat quantity released during the combustion of high-calorie fuels to the heat-absorbing material flow introduced directly into the combustion zone. The mixing degree of the con-stituents of the reaction necessary for binding the noxious materials is obtained by adding the additives directly to the fuel and/or to the air for combustion.
METHOD OF PURIFYING REACTION PRODUCTS
ABSTRACT OF THE DISCLOSER;
A method of purifying reaction products that result from flame combustion of high-calorie fuels containing contaminants, such as sulfur-, chlorine-, and fluorine-compounds. The purification includes the addition of additives in the combustion chamber for binding the contaminants. The temperature necessary for binding the noxious materials is maintained by giving off a portion of the heat quantity released during the combustion of high-calorie fuels to the heat-absorbing material flow introduced directly into the combustion zone. The mixing degree of the con-stituents of the reaction necessary for binding the noxious materials is obtained by adding the additives directly to the fuel and/or to the air for combustion.
Description
116418~
The present invention relates to a method of purifying reaction products ~ich result from flame combustion of high~calo~ie ~lels containing impurities or contaminants such as sulfur-, chlorine-, and fluorine-compounds; such purification is undertaken by the addition of additives into the combustion chamber for binding the contaminants.
Methods are ~lown for carrying out a dry purifi-cation of reaction products from a combustion of fuels c~ontaining contaminants such as sulfur, chlorine and fluorine. In this connection, the additives for bind-ing the contaminants are introduced into the combustion chamber in different ways.
With one known method the additives are injected above the flame region into the combustion chamber with the aid of air streams. The drawback of this known method consists in that the type of introduction of the additives into the combustion chamber does not assure binding of the contaminants by the additives, because the relatively low mixing energy of the air stream is not sufficient to attain a good mixing efficiency of the constituents which take part in ~he reaction. Additionally, the mixing of these ~ ~6~18 ~
constituents occurs to the greatest extent in tempera~
ture ranges which do not assure optimum reaction con-di~ions. Furthermore 9 the duration or retention time available for conclusion of the reaction is insuffi-cient because the injection of the additives generally occurs in reaction-inert regions~
With another kno~l method, the additives are admixed to the fuel directly before introduction of the fuels into the burner. Disadvantageous with this method up to now has been the fact that the additives are subjected to the entire temperature spectrum of the flame, whereby temperature ranges must be traversed which led to inactivation of the additives. This is true especially with fuels having a high heating value, which necessarily lead to flames wQth high temperatures.
It is therefore an object of the present invention to influence the flame temperature during the com-bustion of high calorie fossil fuels, and the condi-tions necessary for the binding of the noxious material as to temperature and mixing degree~ in such a way that by addition of gaseous or fine-gr.~nular additives, the binding of the nox;ous material is already initi-ated during the combustion.
The present invention relates to a method of purifying reaction products ~ich result from flame combustion of high~calo~ie ~lels containing impurities or contaminants such as sulfur-, chlorine-, and fluorine-compounds; such purification is undertaken by the addition of additives into the combustion chamber for binding the contaminants.
Methods are ~lown for carrying out a dry purifi-cation of reaction products from a combustion of fuels c~ontaining contaminants such as sulfur, chlorine and fluorine. In this connection, the additives for bind-ing the contaminants are introduced into the combustion chamber in different ways.
With one known method the additives are injected above the flame region into the combustion chamber with the aid of air streams. The drawback of this known method consists in that the type of introduction of the additives into the combustion chamber does not assure binding of the contaminants by the additives, because the relatively low mixing energy of the air stream is not sufficient to attain a good mixing efficiency of the constituents which take part in ~he reaction. Additionally, the mixing of these ~ ~6~18 ~
constituents occurs to the greatest extent in tempera~
ture ranges which do not assure optimum reaction con-di~ions. Furthermore 9 the duration or retention time available for conclusion of the reaction is insuffi-cient because the injection of the additives generally occurs in reaction-inert regions~
With another kno~l method, the additives are admixed to the fuel directly before introduction of the fuels into the burner. Disadvantageous with this method up to now has been the fact that the additives are subjected to the entire temperature spectrum of the flame, whereby temperature ranges must be traversed which led to inactivation of the additives. This is true especially with fuels having a high heating value, which necessarily lead to flames wQth high temperatures.
It is therefore an object of the present invention to influence the flame temperature during the com-bustion of high calorie fossil fuels, and the condi-tions necessary for the binding of the noxious material as to temperature and mixing degree~ in such a way that by addition of gaseous or fine-gr.~nular additives, the binding of the nox;ous material is already initi-ated during the combustion.
- 2 -. ~
~1641~
This object, and other objects and advantages of the present invention, will appear more clearly from the following specificakion in connection with the accompanying drawing, which is a schematic dr~wing of a coal dust or pulverized coal test burner.
By one aspect of this invention, there is pro-vided a method of purifying reaction pro*ucts which result from flame combustion, in a combustion chamber, of high calorie fuels which contain contaminants such as sulfur-, chlorine-, and fluorine-compounds which result in noxious materials during com~ustion of said fuels~ said method comprising the steps of: adding additives into said combustion chamber to bind said contaminants and noxious materials; adding said addi-tives directly to at least one of said fuel and air for combustion to obtain the mixing degree of the constituents of the reaction necessary for said bind-ing; adding a heat-absorbing material flow directly into the combustion zone of said fuel in said combus-tion chamber; and giving off a portion of the heatreleased during combustion of said fuel to said heat-absorbing material flow to maintain the temperature necessary for said binding ~641~
Different materials carl be used as heat absorb-ing material flow for limiting of the temperature necessary for the reaction. According to one embodi-ment of the present inventive method, the heat-absorb-ing material flow can be cooled-off flue gas poor in oxygen, from ~he combustion procedure itself and re-turned from the outside, or from a separate combustion process.
~ nother possibility also exists according to the present invention to utilize the flue gas from a gas turbine process simultaneously as an oxidation medium and heat-absorbing material flow.
Another possibility is to use recirculated flue gases drawn into the flame as a heat-absorbing material flow within the combustion chamber.
The additives themselves can also serve as heat-absorbing material flow according to the method; this is applicable, for instance, when, during the addition of limestone or dolomite, the energy required for the initiated calcination is withdrawn from the flame.
Reactive gases and metal oxides~ hydroxides, and carbonates, as well as aqueous suspensions thereof, can serve as additives.
l1~41~7 By adding heat~absorbing material flow in the region of the flame, the temp,erature and mixing degree necessary for the reaction of the additives contained in the fuel ~nd/or in the air for combustion ~re obtained.
Referring now to the drawing in detail, the test burner~ which comprises a core-air tube 2, a fuel or coal dust and additive carrier-air part l, and a mantle-air part 3, forms a primary combustion zone 6 having an air number ranging between 0.6 and l.l times the sto~chiometry.
The burner is so embodied that with certain measures (twist of the mantle air, conocally widened burner mouth or opening closed core-air), in the interior of the flame there is generated a zone of intensive back flow or remixing 5 from a region of already advanced combustion. In this way, the fuel-air mixture is rapidly heated up a~d ignited. The heating up and ignition can be influenced by adjusting the core-air quantity.
The remaining air for combustion is iniected as a partial air flow 4 (also known as stepped or differ-ential air flow) along the periphery by means of ~418 ~
several noæzles in such R way that externally of theprimary flame there is formed the secondary flame or post-reaction zone 7.
Along those sections of the peripheral surface of the flame which do not adjoin the partial air flow, the cold flue gases are drawn in from the combustion chamber by momentum or impulse exchange. Consequent-ly the flame temperature is reduced, which contrib~tes to an advantageous influencing of the reaction progress between additives and gaseous noxious materials. Ref-erence numeral 8 designates the inner flue-gas recir-culation.
, . .
.d D
~ ...
~1641~
This object, and other objects and advantages of the present invention, will appear more clearly from the following specificakion in connection with the accompanying drawing, which is a schematic dr~wing of a coal dust or pulverized coal test burner.
By one aspect of this invention, there is pro-vided a method of purifying reaction pro*ucts which result from flame combustion, in a combustion chamber, of high calorie fuels which contain contaminants such as sulfur-, chlorine-, and fluorine-compounds which result in noxious materials during com~ustion of said fuels~ said method comprising the steps of: adding additives into said combustion chamber to bind said contaminants and noxious materials; adding said addi-tives directly to at least one of said fuel and air for combustion to obtain the mixing degree of the constituents of the reaction necessary for said bind-ing; adding a heat-absorbing material flow directly into the combustion zone of said fuel in said combus-tion chamber; and giving off a portion of the heatreleased during combustion of said fuel to said heat-absorbing material flow to maintain the temperature necessary for said binding ~641~
Different materials carl be used as heat absorb-ing material flow for limiting of the temperature necessary for the reaction. According to one embodi-ment of the present inventive method, the heat-absorb-ing material flow can be cooled-off flue gas poor in oxygen, from ~he combustion procedure itself and re-turned from the outside, or from a separate combustion process.
~ nother possibility also exists according to the present invention to utilize the flue gas from a gas turbine process simultaneously as an oxidation medium and heat-absorbing material flow.
Another possibility is to use recirculated flue gases drawn into the flame as a heat-absorbing material flow within the combustion chamber.
The additives themselves can also serve as heat-absorbing material flow according to the method; this is applicable, for instance, when, during the addition of limestone or dolomite, the energy required for the initiated calcination is withdrawn from the flame.
Reactive gases and metal oxides~ hydroxides, and carbonates, as well as aqueous suspensions thereof, can serve as additives.
l1~41~7 By adding heat~absorbing material flow in the region of the flame, the temp,erature and mixing degree necessary for the reaction of the additives contained in the fuel ~nd/or in the air for combustion ~re obtained.
Referring now to the drawing in detail, the test burner~ which comprises a core-air tube 2, a fuel or coal dust and additive carrier-air part l, and a mantle-air part 3, forms a primary combustion zone 6 having an air number ranging between 0.6 and l.l times the sto~chiometry.
The burner is so embodied that with certain measures (twist of the mantle air, conocally widened burner mouth or opening closed core-air), in the interior of the flame there is generated a zone of intensive back flow or remixing 5 from a region of already advanced combustion. In this way, the fuel-air mixture is rapidly heated up a~d ignited. The heating up and ignition can be influenced by adjusting the core-air quantity.
The remaining air for combustion is iniected as a partial air flow 4 (also known as stepped or differ-ential air flow) along the periphery by means of ~418 ~
several noæzles in such R way that externally of theprimary flame there is formed the secondary flame or post-reaction zone 7.
Along those sections of the peripheral surface of the flame which do not adjoin the partial air flow, the cold flue gases are drawn in from the combustion chamber by momentum or impulse exchange. Consequent-ly the flame temperature is reduced, which contrib~tes to an advantageous influencing of the reaction progress between additives and gaseous noxious materials. Ref-erence numeral 8 designates the inner flue-gas recir-culation.
, . .
.d D
~ ...
Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of purifying reaction products which result from flame combustion, in a combustion chamber, of high calorie fuels which contain contami-nants such as sulfur-, chlorine-, and fluorine-com-pounds which result in noxious materials during com-bustion of said fuels, said method comprising the steps of:
adding additives into said combustion chamber to bind said contaminants and noxious materials;
adding said additives directly to at least one of said fuel and air for combustion to obtain the mixing degree of the constituents of the reaction necessary for said binding;
adding a heat-absorbing material flow directly into the combustion zone of said fuel in said combustion chamber; and giving off a portion of the heat released during combustion of said fuel to said heat-absorbing material flow to maintain the temperature necessary for said binding.
adding additives into said combustion chamber to bind said contaminants and noxious materials;
adding said additives directly to at least one of said fuel and air for combustion to obtain the mixing degree of the constituents of the reaction necessary for said binding;
adding a heat-absorbing material flow directly into the combustion zone of said fuel in said combustion chamber; and giving off a portion of the heat released during combustion of said fuel to said heat-absorbing material flow to maintain the temperature necessary for said binding.
2. A method according to claim 1, which in-cludes the step of providing cooled-off flue gas which is poor in oxygen as said heat-absorbing material flow.
3. A method according to claim 2, which in-cludes the step of providing said flue gas from the combustion procedure by means of external recycling.
4. A method according to claim 2, which in-cludes the step of providing said flue gas from an external combustion process.
5. A method according to claim 4, which in-cludes the steps of providing said flue gas from a gas turbine process, and using same as an oxidation medium.
6. A method according to claim 1, which in-cludes the step of using recirculated flue gases drawn into the flame as said heat-absorbing material flow within said combustion chamber.
7. A method according to claim 1, which in-cludes the step of selecting said additives from the group consisting of reactive gases, metal oxides, hydroxides, and carbonates, and aqueous suspensions thereof.
8. A method according to claim 17 which in-cludes the step of simultaneously using said additives as said heat-absorbing material flow.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803020145 DE3020145A1 (en) | 1980-05-28 | 1980-05-28 | METHOD FOR CLEANING REACTION PRODUCTS |
| DEP3020145.7 | 1980-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1164187A true CA1164187A (en) | 1984-03-27 |
Family
ID=6103377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000378438A Expired CA1164187A (en) | 1980-05-28 | 1981-05-27 | Method of purifying reaction products |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPS5710006A (en) |
| AU (1) | AU7109681A (en) |
| BE (1) | BE889035A (en) |
| CA (1) | CA1164187A (en) |
| DE (1) | DE3020145A1 (en) |
| DK (1) | DK233981A (en) |
| FR (1) | FR2483452A1 (en) |
| GB (1) | GB2079442B (en) |
| HK (1) | HK78484A (en) |
| IT (1) | IT1194799B (en) |
| MY (1) | MY8500558A (en) |
| NL (1) | NL8102612A (en) |
| SG (1) | SG17584G (en) |
| ZA (1) | ZA813622B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3409862A1 (en) * | 1984-03-17 | 1985-09-19 | Burkel, Wolfgang, Dr.-Ing., 8200 Rosenheim | Method for producing environmentally safe solid fuels |
| US4555996A (en) * | 1984-07-06 | 1985-12-03 | Acurex Corp. | Method for reduction of sulfur products in the exhaust gases of a combustion chamber |
| DE102004059679B4 (en) * | 2003-12-16 | 2005-12-22 | Alstom Power Boiler Gmbh | Round burner for combustion of dusty fuel |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1095436B (en) * | 1957-04-03 | 1960-12-22 | Deutsche Erdoel Ag | Device for metering and introducing dust-like, corrosion-inhibiting additives into the combustion chamber of oil firing systems by means of an air stream |
| GB899744A (en) * | 1957-07-11 | 1962-06-27 | Bohdan Jan Zaczek | Improvements in or relating to the injection of fuel additives |
| US4023921A (en) * | 1975-11-24 | 1977-05-17 | Electric Power Research Institute | Oil burner for NOx emission control |
| CH602166A5 (en) * | 1976-02-12 | 1978-07-31 | Mueller Ernst Kg | Removing sulphur and its cpds. from waste combustion gas |
| CA1070963A (en) * | 1976-03-08 | 1980-02-05 | Exxon Research And Engineering Company | Minimizing nox production in operation of gas turbine combustors |
| DE2932676C2 (en) * | 1979-08-11 | 1983-01-27 | L. & C. Steinmüller GmbH, 5270 Gummersbach | Process for binding sulfur, chlorine and fluorine compounds during combustion |
-
1980
- 1980-05-28 DE DE19803020145 patent/DE3020145A1/en not_active Withdrawn
-
1981
- 1981-05-27 AU AU71096/81A patent/AU7109681A/en not_active Abandoned
- 1981-05-27 FR FR8110570A patent/FR2483452A1/en active Pending
- 1981-05-27 DK DK233981A patent/DK233981A/en not_active Application Discontinuation
- 1981-05-27 NL NL8102612A patent/NL8102612A/en not_active Application Discontinuation
- 1981-05-27 CA CA000378438A patent/CA1164187A/en not_active Expired
- 1981-05-28 IT IT22012/81A patent/IT1194799B/en active
- 1981-05-28 JP JP8021381A patent/JPS5710006A/en active Pending
- 1981-05-28 GB GB8116365A patent/GB2079442B/en not_active Expired
- 1981-05-29 ZA ZA00813622A patent/ZA813622B/en unknown
- 1981-06-01 BE BE0/204959A patent/BE889035A/en not_active IP Right Cessation
-
1984
- 1984-02-29 SG SG175/84A patent/SG17584G/en unknown
- 1984-10-18 HK HK784/84A patent/HK78484A/en unknown
-
1985
- 1985-12-30 MY MY558/85A patent/MY8500558A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5710006A (en) | 1982-01-19 |
| BE889035A (en) | 1981-10-01 |
| DK233981A (en) | 1981-11-29 |
| IT8122012A0 (en) | 1981-05-28 |
| ZA813622B (en) | 1982-07-28 |
| SG17584G (en) | 1985-03-08 |
| HK78484A (en) | 1984-10-26 |
| DE3020145A1 (en) | 1981-12-10 |
| FR2483452A1 (en) | 1981-12-04 |
| MY8500558A (en) | 1985-12-31 |
| AU7109681A (en) | 1981-12-03 |
| NL8102612A (en) | 1981-12-16 |
| GB2079442A (en) | 1982-01-20 |
| IT8122012A1 (en) | 1982-11-28 |
| GB2079442B (en) | 1984-01-04 |
| IT1194799B (en) | 1988-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1316329C (en) | Apparatus and method of reducing nitrogen oxide emissions | |
| CN1276214C (en) | Low nitrogen oxide emissions using three stages of fuel oxidation and in-situ furnance fuel gas recirculation | |
| US4331638A (en) | Method of dry scrubbing reaction products resulting from flame burning | |
| CA2057221C (en) | Segregated zoning combustion | |
| JP2942711B2 (en) | Deep stage combustion method | |
| CA2072893A1 (en) | Combustion process | |
| AU2001265303A1 (en) | Low nitrogen oxides emissions using three stages of fuel oxidation and in-situ furnace flue gas recirculation | |
| GB2048456A (en) | Reducing NOx emission from burners | |
| US5501162A (en) | Method of fuel combustion | |
| ATE199280T1 (en) | RAW GAS BURNER AND METHOD FOR BURNING OXYGEN CONTAINING COMPONENTS IN A PROCESS GAS | |
| CN103791493B (en) | Pulverized coal flame preheating fires system again | |
| CA1164187A (en) | Method of purifying reaction products | |
| US5655899A (en) | Apparatus and method for NOx reduction by controlled mixing of fuel rich jets in flue gas | |
| ATE106127T1 (en) | PROCESS AND COMBUSTION PLANT FOR REDUCING NITROUS OXIDE FORMATION WHEN COMBUSTING FOSSIL FUELS. | |
| RU2089270C1 (en) | Method and installation for complete dry desulfurization of effluent combustion gases containing sulfur dioxide | |
| RU2107223C1 (en) | Furnace | |
| CN205842694U (en) | A kind of low NOx incinerator processing nitrogenous waste gas, waste liquid | |
| CN107937034A (en) | A kind of more burner entrained flow gasification furnace ignitings go into operation integrated apparatus and the method for feeding intake | |
| CN207659403U (en) | More burner entrained flow gasification furnace ignitings go into operation the integrated apparatus that feeds intake | |
| RU2350838C1 (en) | High-temperature cyclone reactor | |
| SU1695036A1 (en) | Boiler furnace | |
| SU1236249A1 (en) | Furnace device | |
| SU457845A1 (en) | A method of reducing the concentration of nitrogen oxides in gaseous emissions of thermal aggregates | |
| CA1145657A (en) | Method of reducing no.sub.x-emission | |
| SU1638447A1 (en) | Boiler furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |