EP2995858A1 - Procédé pour brûler des effuents gazeux avec apport d'oxygène - Google Patents

Procédé pour brûler des effuents gazeux avec apport d'oxygène Download PDF

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Publication number
EP2995858A1
EP2995858A1 EP14003811.8A EP14003811A EP2995858A1 EP 2995858 A1 EP2995858 A1 EP 2995858A1 EP 14003811 A EP14003811 A EP 14003811A EP 2995858 A1 EP2995858 A1 EP 2995858A1
Authority
EP
European Patent Office
Prior art keywords
oxygen
flame
gas
containing gas
combustion
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.)
Withdrawn
Application number
EP14003811.8A
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German (de)
English (en)
Inventor
Joachim Goldbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Priority to US14/827,610 priority Critical patent/US20160076765A1/en
Priority to PCT/EP2015/001828 priority patent/WO2016037706A1/fr
Priority to CN201580049034.2A priority patent/CN107076413A/zh
Priority to BR112017004793A priority patent/BR112017004793A2/pt
Priority to RU2017112021A priority patent/RU2017112021A/ru
Publication of EP2995858A1 publication Critical patent/EP2995858A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F23G7/08—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases using flares, e.g. in stacks

Definitions

  • the invention relates to a method for combustion of exhaust gases, which emerge from an exhaust pipe, wherein the exhaust gases are burned to form a flame at the outlet end of the exhaust pipe and a device for combustion of exhaust gases, which an exhaust pipe with an outlet end for the exhaust gas and one with a Oxygen tank connected oxygen supply and an igniter includes.
  • Flaring is widely used in refineries and in the chemical industry to remove waste gases, particularly during start-up and shut-down procedures and at pressure relief and discharge facilities. Even in the case of incidents, large quantities of gas can escape.
  • the flaring is used where another use for the flared gas according to the prior art or the market demand does not make sense or financially uninteresting.
  • Such a method for combustion of exhaust gas has a flare with a steam supply, wherein the exhaust gas is ignited and burned at the outlet end of a chimney-like pipe.
  • the steam is introduced into the flame at high speed and draws in ambient air and thus oxygen into the core of the flame, thus improving combustion.
  • a method is known, for example, from the company brochure "Fackelsystem” SPG Prematechnik GmbH. It is often the case that large volumes of steam are generated in chemical plants, which are available for combustion. But if there is a lockout due to a malfunction or to an unexpected shutdown of the chemical plant, no more steam is available and the air is no longer drawn into the flame by the lack of steam, so that the inside of the flame is not enough oxygen is available for complete combustion, resulting in heavy soot.
  • Another method of combusting exhaust gases includes introducing an oxygen-fuel mixture into the flame, wherein the oxygen and the fuel are fed to and mixed by two conduits to a burner. Thereby, a high-temperature flame is formed, whereby the oxygen-fuel ratio of the mixture is adjusted according to the desired oxidation potential of the combustion.
  • a method is for example from US 3,864,072 known.
  • Object of the present invention is to provide a method for combustion of exhaust gases from a refinery or a chemical operation, so that the exhaust gases can be burned more effectively, completely and soot-free especially in case of incidents of the plant.
  • This object is achieved by a method for combustion of exhaust gases with the features of claim 1, wherein the exhaust gases from an exhaust pipe and are burned to form a flame at the outlet end of the exhaust pipe, wherein an oxygen-containing gas having an oxygen content of more than 22% in the flame is introduced.
  • a device for combustion of exhaust gases which comprises an exhaust pipe with an outlet end and a supply and an ignition device, wherein the supply is designed as an oxygen supply and is connected to an oxygen tank.
  • an oxygen-containing gas having an oxygen content of more than 22% is introduced into the exhaust gas, so that sufficient oxygen is available in the interior of the flame and an efficient and complete and soot-free combustion of exhaust gases is achieved.
  • the exhaust gases originate from a refinery or a chemical operation.
  • the exhaust gases for example, accumulate during a mass transfer process or are no longer usable gaseous waste products, e.g. from internal combustion engines or technical incinerators.
  • the invention is particularly used when the exhaust gases are harmful and hazardous to humans and / or the environment.
  • an oxygen-containing gas in particular oxygen-enriched air having an oxygen content of more than 30% by volume, more than 50% by volume, more than 80% by volume or technically pure oxygen having an oxygen content of more than 95% Vol% or more than 99% by volume used, so that the exhaust gas reacts with the oxygen more effectively and a complete combustion is performed. Due to the supply of oxygen, the combustion of the carbon compounds in the exhaust gas improves. This has the advantage that less soot is formed and also the nitrogen oxides in the exhaust gas are reduced.
  • the process is used when the exhaust gas contains hydrocarbons or other toxic, polluting or harmful substances, e.g. Carbon monoxide, nitrogen oxide, sulfur oxide.
  • hydrocarbons or other toxic substances e.g. Carbon monoxide, nitrogen oxide, sulfur oxide.
  • the hydrocarbons or other toxic substances are produced, for example, in a refinery or in a chemical operation with incomplete combustion of carbonaceous fuel.
  • the oxygen-containing gas is preferably at high speed, preferably 0.1 to 3 times the speed of sound, more preferably 0.5 to 2 times, most preferably 0.8 to 1.2 times the speed of sound is sent through a nozzle and brought into the interior of the flame.
  • the speed is above the nozzle cross section and the supply pressure determined and set on the form at startup and set before installation of the system. As the speed increases, more ambient air is drawn in, leading to more oxygen in the core of the flame, so that the exhaust gas burns better.
  • the injection of the oxygen-containing gas into the combustion zone causes turbulence in the flame, so that the air is mixed with the exhaust gas for smokeless combustion.
  • the oxygen-containing gas is introduced into the flame near the outlet end of the exhaust pipe at an angle of 0 to 45 degrees, preferably 10 to 30 degrees to the vertical, to maintain the flame even in crosswinds.
  • the oxygen-containing gas is sprayed into the flame to draw in additional ambient air and to convey further oxygen into the flame kernel.
  • the oxygen supply is used in accidents of operation when no or not enough steam is generated, e.g. in case of lockout due to a malfunction or unforeseen shutdown of the chemical plant.
  • the exhaust gases can then be burned effectively and without soot without steam supply.
  • the combustion device comprises an exhaust pipe with an outlet end for the exhaust gas and a supply and an ignition device which ignites the gas mixture from the exhaust pipe and forms a flame, for. B. pilot burner, ignition electrode, gas ignition burner, etc., wherein the supply is designed as an oxygen supply and is connected to an oxygen tank.
  • the apparatus is constructed so that the oxygen supply ends near the exit end of the exhaust pipe, so that the oxygen-containing gas is introduced into the flame while sucking air into the combustion zone and generates air turbulence to supply the air with the exhaust gas for smokeless combustion Mix.
  • the oxygen supply is preferably established at an angle of 0 to 45 degrees, preferably 10 to 30 degrees to the vertical, so that the flame is maintained upright in crosswinds.
  • a nozzle is used to inject the oxygen into the flame to draw in additional ambient air and to convey further oxygen into the flame kernel.
  • a nozzle is understood to mean a pipe section with a cross-sectional constriction and / or a cross-sectional widening and / or further complex shapes, in particular a venturi nozzle.
  • the oxygen tank is a liquid tank, wherein the liquid oxygen from the liquid tank is converted into gaseous oxygen with an evaporator and introduced into the flame through the exit end of the oxygen supply.
  • the oxygen supply is connected via a valve to an oxygen tank, which serves to release the fixed set amount of oxygen and is formed as a shut-off valve.
  • an oxygen tank which serves to release the fixed set amount of oxygen and is formed as a shut-off valve.
  • a second line is additionally used in the device, so that the exhaust gases can be burned with a gas other than oxygen, in particular steam, if enough other gas from the chemical plant or the chemical operation is available to sufficient air in the To burn in the combustion zone of the flame.
  • FIG. 1 a schematic view of a device according to the invention for the combustion of exhaust gases is shown.
  • the device consists of an exhaust pipe 1, an ignition device 2 and an oxygen line 3, which is connected to an oxygen tank 4.
  • the exhaust gases which are produced, for example, in a refinery or in a chemical operation with incomplete combustion of carbonaceous fuel, exit through the exhaust pipe 1 and are ignited with the ignition device 2 to form a flame.
  • An oxygen-containing gas in particular oxygen-enriched air having an oxygen content of more than 30% by volume, more than 50% by volume, more than 80% by volume or technically pure oxygen having an oxygen content of more than 95% by volume or more 99 vol%, is introduced through the oxygen line 3 into the flame, wherein the oxygen is introduced from a liquid oxygen tank 4 via a valve 5.
  • the valve 5 is used to release the fixed set amount of oxygen and is designed as a shut-off valve. In addition, it is easier to provide oxygen in a tank system than to produce steam, especially if there is an accident.
  • the oxygen supply according to the invention introduces more oxygen into the core of the flame, resulting in an advantage of complete combustion and less soot formation.
  • the oxygen supply is preferably arranged in the vicinity of the exhaust pipe at an angle of 0 to 45 degrees, preferably 10 to 30 degrees to the vertical upward, so that the flame is maintained upright in crosswinds.
  • the oxygen-containing gas is preferably sprayed into the flame with a nozzle, in particular a Venturi nozzle, in order to suck in additional more ambient air and to convey further oxygen into the flame kernel.
  • the oxygen-containing gas can be introduced at the speed of sound or similar high speed, with more ambient air is drawn into the combustion zone with increasing speed and there vortexes are generated, which lead to an effective and smokeless combustion.
  • FIG. 2 shows an alternative device according to the invention.
  • identical elements are provided with the same reference numbers.
  • a second line 6 is provided in the device according to FIG. 2 .
  • the exhaust gases are normally burned under supply of another gas, in particular steam, as the oxygen-containing gas.
  • the normal case is when the other gas in the chemical plant is sufficiently generated or otherwise made available, so that sufficient air is drawn by the supply of the other gas in the flame.
  • oxygen-containing gas is additionally introduced from the oxygen pipe 3 into the flame.
  • the flame is thus supplied to both the oxygen-containing gas and the other gas, for example steam.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)
EP14003811.8A 2014-09-11 2014-11-12 Procédé pour brûler des effuents gazeux avec apport d'oxygène Withdrawn EP2995858A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US14/827,610 US20160076765A1 (en) 2014-09-11 2015-08-17 Method for combusting exhaust gas with oxygen feed line
PCT/EP2015/001828 WO2016037706A1 (fr) 2014-09-11 2015-09-10 Procédé de combustion d'effluents gazeux avec alimentation en oxygène
CN201580049034.2A CN107076413A (zh) 2014-09-11 2015-09-10 借助氧供应装置燃烧废气的方法
BR112017004793A BR112017004793A2 (pt) 2014-09-11 2015-09-10 método para a combustão de gás de exaustão com alimentação de oxigênio
RU2017112021A RU2017112021A (ru) 2014-09-11 2015-09-10 Способ сжигания отходящего газа с подводом кислорода

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014134741 2014-09-11

Publications (1)

Publication Number Publication Date
EP2995858A1 true EP2995858A1 (fr) 2016-03-16

Family

ID=51900079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14003811.8A Withdrawn EP2995858A1 (fr) 2014-09-11 2014-11-12 Procédé pour brûler des effuents gazeux avec apport d'oxygène

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EP (1) EP2995858A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3864072A (en) 1973-10-10 1975-02-04 Airco Inc Combustion system for Flare Gas
GB1413793A (en) * 1971-12-10 1975-11-12 Exxon Research Engineering Co Flame combustion
US6638059B1 (en) * 1998-12-30 2003-10-28 Total Raffinage Distribution S.A. Burner-type apparatus and fuel combustion method
US20080145807A1 (en) * 2004-12-02 2008-06-19 Saudi Arabian Oil Company Flare stack combustion method and apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1413793A (en) * 1971-12-10 1975-11-12 Exxon Research Engineering Co Flame combustion
US3864072A (en) 1973-10-10 1975-02-04 Airco Inc Combustion system for Flare Gas
US6638059B1 (en) * 1998-12-30 2003-10-28 Total Raffinage Distribution S.A. Burner-type apparatus and fuel combustion method
US20080145807A1 (en) * 2004-12-02 2008-06-19 Saudi Arabian Oil Company Flare stack combustion method and apparatus

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