EP0039376A1 - Torche à gaz et procédé pour brûler du gaz résiduel - Google Patents

Torche à gaz et procédé pour brûler du gaz résiduel Download PDF

Info

Publication number
EP0039376A1
EP0039376A1 EP80301449A EP80301449A EP0039376A1 EP 0039376 A1 EP0039376 A1 EP 0039376A1 EP 80301449 A EP80301449 A EP 80301449A EP 80301449 A EP80301449 A EP 80301449A EP 0039376 A1 EP0039376 A1 EP 0039376A1
Authority
EP
European Patent Office
Prior art keywords
steam
flow rate
air
valve
flare stack
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Withdrawn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
EP80301449A
Other languages
German (de)
English (en)
Inventor
John S. Zink
Robert D. Reed
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.)
Zinklahoma Inc
Original Assignee
John Zink Co
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 John Zink Co filed Critical John Zink Co
Priority to EP80301449A priority Critical patent/EP0039376A1/fr
Publication of EP0039376A1 publication Critical patent/EP0039376A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • F23G7/085—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 in stacks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • F23L7/002—Supplying water
    • F23L7/005—Evaporated water; Steam

Definitions

  • This invention lies in the field of gas flaring systems. More particularly, it concerns flares in which waste gases are flared and in which steam is used for injection into the flame zone for the purpose of smokeless combustion of the gases,
  • this invention is concerned with the protection of the steam injection parts from excessive heat due to the maintenance gas flow, when waste gases are not being flared.
  • the flare is either in standby condition, for emergency flaring, or is discharging and burning gases at a minimal rate, which may be of the order of 1% of design flow capacity.
  • This condition of gas burning even though it is a small portion of the flare capacity, it is still productive of enough heat to very seriously damage the steam injection parts, unless there is constant flow of a coolant medium through and from the steam injection parts.
  • a typical coolant medium is steam, and when the weather is mild, cooling by steam flow is quite satisfactory. Although the quantity of steam flowing is quite small, because the cost of steam is so great, such flow is expensive. Also, in cold weather, a large portion of the steam condenses to water, to be sprayed at random over the critical flare discharge areas. At very low temperatures, ice forms in or near the flare discharge areas to partially or completely block the flared gas passages to the atmosphere. This can bring about a condition of extreme emergency in the process operations, where flare venting of emergency relieved gases demands instant and unobstructed gas flow to the atmosphere.
  • Blower means are provided which force air through a conduit and through a remote-controlled valve, and through a series connected manual valve, into the steam line which passes up the flare stack to the burning zone.
  • the steam line which is provided to carry live steam from a distant source to the steam line up the flare stack, and to the steam injection parts at the burning zone, passes through a steam separator which separates condensate from the steam.
  • the steam then passes through a remote-controlled valve and to the steam line up the flare stack.
  • the valve in the steam line and the valve in the air line are both connected to the same signal source but they operate in opposition, such that when the air valve is open the steam valve is closed, and vice versa.
  • FIGURE 1 illustrates one embodiment of the system in which steam is applied through a steam line 50, in accordance with the arrow 68, for the purpose of injection into a steam injection apparatus 16, 18 on the top of a flare stack 10 shown in FIGURE 2.
  • the steam line includes a condensate trap 62 and condensed water outlet pipe 64, where any condensate carried by the steam 68 is separated in the form of water flow indicated by the arrow 66.
  • the steam flow 60 then proceeds through a conduit 50, through a remote-controlled valve 48, and through a pipe 28 to the base of the flare stack 10 and to steam riser pipe 22, which passes up along the side of the stack 10, as shown in FIGURE 2, to the steam injection parts 16, 18 at the top of the flare stack.
  • These steam injection parts comprise a circular manifold 16 which surrounds the flare stack at the top 12, a plurality of small diameter pipes 18 which rise up from the manifold 16, and which have radial openings or orifices, from which the steam sprays out radially across the combustion zone, immediately above the top 12 of the stack.
  • the waste gases 14 pass up through the flare stack 10, either as shown, or as in some cases through a spider arm burner, or similar device, to the flame zone.
  • the steam jets 20 are at high velocity and are directed inwardly to the hot burning gases, which cause turbulence.and mixing of the steam with the hot gases to provide the desired chemistry of smokeless burning.
  • valves 36 and 48 have operating controls 38 and 46 respectively, which are connected by control leads 44 to a control means, not shown, but well known in the art.
  • the control means may be pneumatic or electric, as is well known in the art.
  • the two valves 36 and 48 are connected so that they are in opposition, one being closed when the other is open, and vice versa.
  • the blower 42 is operated, and air is supplied through open valve 36, up pipe 22 to the steam parts 16 and 18, providing cool air through the hot parts to prevent damage due to the heat of the flame.
  • the cooling system must permit alternate selection of a cooling medium. Steam may be selected as the alternate medium, but any gaseous coolant flow would be equally good.
  • a bypass 52 is provided so that a small part of the steam 60 can go through the bypass 52, through a valve 56 and through a flow limiting orifice 54, and in accordance with arrow 57 flow back into the steam line 22, and up to the top of the flare stack.
  • valves 56 and 48 When the ambient temperature is above freezing, of course, either air or steam can be used for standby.
  • the valves 56 and 48 would be closed and the valve 36 would be open, and air would be supplied from the blower 42.
  • the valve 36 In the other case, the valve 36 would be closed, or alternately the valve 34 can be closed., and the valve 56 opened, providing a maintenance flow of steam for purposes of cooling the parts 16 and 18, etc.
  • valve 48 When the flow of waste gases is initiated, the control on 44 then opens valve 48 and closes 36 and permits a full flow of steam 60 through valve 48 and as arrow 24 to the injection parts 16 and 18, in the well known manner.
  • the preferred gas to use for cooling purposes is air, since in the use of blower-supplied air, there is no danger of carrying water to the region of the steam injection parts.
  • the use of air for cooling the steam injection part corrects for one source of water at the top of the flare stack.
  • the other source of water due to the condensation of steam inside the steam supply line is preferably corrected by means of apparatus 62, which provides a separation or trap, for the condensate, and permits the dry steam to pass on as arrow 60 to the riser pipe 22 and to the stack.
  • Such steam-induced cooling is vitally necessary to avoid severe heat damage to the steam injection parts when there is flame at the flare discharge point, and without reference to the size of the flame produced. Since steam injection parts demand cooling when flame is present, and since venting at 0.5% of design (200-1 turn-down) does not cause steam injection under control, but does create appreciable flame at the flaring point, as a source of heat damage to injection parts, it has been common practice to add a by-pass around the steam control valve to assure small steam . delivery to injection parts on a 24-hour basis via the normal steam supply system after the control valve.
  • the small steam delivery thus described suitably cools the injection parts when there is flame present as at 0.5 to 1% of design gas venting, or even more than 1% of design venting rate, as is practice-proven in hundreds of cases. But the small steam delivery is productive of an accessory problem in frigid weather when there is no gas venting, and this second problem is utterly severe. Due to cold weather, the small quantity of steam condenses when there is zero venting of gases to the flare and no flame is present at the flare discharge point. The condensed steam (water) spatters and freezes on flare parts, including the gas tube to the burning point, which may become covered with ice. Emergency venting of gases then becomes impossible, and the process facility is, totally, in danger of explosion because pressure-relief on process equipment (which is the main reason for the flare) is impossible.
  • a signal comes via 44 to 38 and 46 to cause closure of 36 and opening of 48.
  • the signal to 38 removes motive power from 42, via 72, and flow of air 32 ceases, while steam begins to flow through opened 48 via 28 to 22. Meanwhile, 56 is closed. Because 36 is closed, steam must proceed via 22 to 16 and 18 for the required smoke suppression as long as there is operating signal via 44.
  • the numeral 68 is for steam flow, as permitted, or required.
  • Condensate water
  • 62 is a trap means for condensate removal from the steam system as 66 from 64 to permit flow of dry steam as at 60.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
EP80301449A 1980-05-02 1980-05-02 Torche à gaz et procédé pour brûler du gaz résiduel Withdrawn EP0039376A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP80301449A EP0039376A1 (fr) 1980-05-02 1980-05-02 Torche à gaz et procédé pour brûler du gaz résiduel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80301449A EP0039376A1 (fr) 1980-05-02 1980-05-02 Torche à gaz et procédé pour brûler du gaz résiduel

Publications (1)

Publication Number Publication Date
EP0039376A1 true EP0039376A1 (fr) 1981-11-11

Family

ID=8187158

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80301449A Withdrawn EP0039376A1 (fr) 1980-05-02 1980-05-02 Torche à gaz et procédé pour brûler du gaz résiduel

Country Status (1)

Country Link
EP (1) EP0039376A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102374547A (zh) * 2010-07-15 2012-03-14 约翰新科公司 混合火炬装置和方法
CN106705075A (zh) * 2016-12-12 2017-05-24 深圳智慧能源技术有限公司 强制气膜冷却的火炬
CN109185901A (zh) * 2018-10-15 2019-01-11 南京工业大学 一种用于发电的火炬气回收处理系统及其回收处理方法
CN115872358A (zh) * 2022-12-06 2023-03-31 国家能源集团宁夏煤业有限责任公司 变换系统和变换系统控制方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1946526B2 (de) * 1968-09-30 1976-05-26 John Zink Co., Tulsa, OkIa. (V.St.A.) Fackelbrenner
DE1964876B2 (de) * 1969-03-20 1976-06-16 John Zink Co., Tulsa, OkIa. (V.St.A.) Fackelbrenner
DE2710493A1 (de) * 1976-03-11 1977-09-22 Zink Co John Kamin zur verbrennung von brennstoffabgasen
DE2725202A1 (de) * 1976-06-04 1977-12-15 Zink Co John Luftbeschickte abgasverbrennungsvorrichtung an fackelkaminen
DE2812161A1 (de) * 1977-03-21 1978-10-05 Zink Co John Vorrichtung zum rauchlosen abfackeln von abgasen
DE2830698A1 (de) * 1977-07-15 1979-02-01 Zink Co John Anlage zum abfackeln von abgasen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1946526B2 (de) * 1968-09-30 1976-05-26 John Zink Co., Tulsa, OkIa. (V.St.A.) Fackelbrenner
DE1964876B2 (de) * 1969-03-20 1976-06-16 John Zink Co., Tulsa, OkIa. (V.St.A.) Fackelbrenner
DE2710493A1 (de) * 1976-03-11 1977-09-22 Zink Co John Kamin zur verbrennung von brennstoffabgasen
DE2725202A1 (de) * 1976-06-04 1977-12-15 Zink Co John Luftbeschickte abgasverbrennungsvorrichtung an fackelkaminen
DE2812161A1 (de) * 1977-03-21 1978-10-05 Zink Co John Vorrichtung zum rauchlosen abfackeln von abgasen
DE2830698A1 (de) * 1977-07-15 1979-02-01 Zink Co John Anlage zum abfackeln von abgasen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102374547A (zh) * 2010-07-15 2012-03-14 约翰新科公司 混合火炬装置和方法
AU2011203216B2 (en) * 2010-07-15 2013-07-04 John Zink Company, Llc Hybrid flare apparatus and method
US8629313B2 (en) 2010-07-15 2014-01-14 John Zink Company, Llc Hybrid flare apparatus and method
CN106705075A (zh) * 2016-12-12 2017-05-24 深圳智慧能源技术有限公司 强制气膜冷却的火炬
CN106705075B (zh) * 2016-12-12 2023-12-12 深圳智慧能源技术有限公司 强制气膜冷却的火炬
CN109185901A (zh) * 2018-10-15 2019-01-11 南京工业大学 一种用于发电的火炬气回收处理系统及其回收处理方法
CN109185901B (zh) * 2018-10-15 2023-07-18 南京工业大学 一种用于发电的火炬气回收处理系统及其回收处理方法
CN115872358A (zh) * 2022-12-06 2023-03-31 国家能源集团宁夏煤业有限责任公司 变换系统和变换系统控制方法

Similar Documents

Publication Publication Date Title
US4227872A (en) Apparatus for supplying alternate gases to steam injection means on a flare stack
AU730820B2 (en) Fuel supply apparatus for gas turbine and control unit for the same
US2564310A (en) Means for controlling the head pressure in refrigerating systems
CN100572919C (zh) 安装在液化气运输船舶或者液化气终端上的气体焚烧炉
GB2241537A (en) Prevention of icing in the intakes of aerospace propulsors
US3812872A (en) System to prevent freezing of heating units such as boilers
WO2008130778A1 (fr) Vaporiseur d'air et utilisation de celui-ci dans une unité de regaséification de gnl de base
EP0039376A1 (fr) Torche à gaz et procédé pour brûler du gaz résiduel
US7870747B1 (en) Fogless ambient air vaporizer
US6102066A (en) Condensate drain for an automatic sprinkler system of the dry-pipe type
CA1134737A (fr) Dispositif d'alimentation alternee en gaz pour injecteur de vapeur sur cheminee de brulage
EP0387983B1 (fr) Chauffe-eau
US6675795B2 (en) Freeze resistant method for draining furnace condensate in low temperature environments
JPH09236025A (ja) ガスタービンの燃料供給装置およびその制御装置
US2207662A (en) Fire extinguishing system
US5085037A (en) Minimizing the effects of icing in the intakes of aerospace propulsors
JP2003138949A (ja) ガスタービン吸気装置
CN214533240U (zh) 一种天然气介质燃调系统
JPS5980600A (ja) 窒素ガス封入装置
US853345A (en) Apparatus for extracting moisture from compressed air.
RU2030194C1 (ru) Устройство для тушения пожара перегретой водой
CN114109607B (zh) 热负荷自适应燃机透平冷却空气余热回收系统及控制方法
JPH0333345B2 (fr)
JPH0633360Y2 (ja) ガス冷却装置
SU1038796A1 (ru) Устройство дл защиты рекуператоров промышленных печей при аварийном прекращении подачи воздуха

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19821021

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ZINK, JOHN S.

Inventor name: REED, ROBERT D.