US3901643A - Temperature-pressure activated purge gas flow system for flares - Google Patents

Temperature-pressure activated purge gas flow system for flares Download PDF

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Publication number
US3901643A
US3901643A US502159A US50215974A US3901643A US 3901643 A US3901643 A US 3901643A US 502159 A US502159 A US 502159A US 50215974 A US50215974 A US 50215974A US 3901643 A US3901643 A US 3901643A
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US
United States
Prior art keywords
temperature
gas
flare
pressure
purge 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.)
Expired - Lifetime
Application number
US502159A
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English (en)
Inventor
Robert D Reed
John S Zink
Robert E Schwartz
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.)
KGI Inc
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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 US502159A priority Critical patent/US3901643A/en
Priority to GB30255/75A priority patent/GB1490591A/en
Priority to NLAANVRAGE7509255,A priority patent/NL177774C/nl
Priority to CA233,451A priority patent/CA1053137A/en
Priority to DE2537351A priority patent/DE2537351C2/de
Application granted granted Critical
Publication of US3901643A publication Critical patent/US3901643A/en
Priority to IT51092/75A priority patent/IT1041543B/it
Priority to JP50104862A priority patent/JPS5150036A/ja
Priority to FR7526718A priority patent/FR2283396A1/fr
Assigned to KOCH ENGINEERING COMPANY, INC. reassignment KOCH ENGINEERING COMPANY, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: JOHN ZINK COMPANY
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/025—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using electrical or electromechanical means
    • 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
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2207/00—Control
    • F23G2207/10—Arrangement of sensing devices
    • F23G2207/101—Arrangement of sensing devices for temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2207/00—Control
    • F23G2207/10—Arrangement of sensing devices
    • F23G2207/102—Arrangement of sensing devices for pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2208/00—Safety aspects
    • F23G2208/10—Preventing or abating fire or explosion, e.g. by purging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/40—Air or oxygen enriched air, i.e. generally less than 30mol% of O2

Definitions

  • the second factor is temperature change within the system, dueto either meteorological conditions, or due to the flaring of waste gases-at significant temperature level.
  • the system volume is approximately 2400 cubic feet. Assuming such a volume is filled with flare gases at 250 F. during a flaring period and wheri the discharge of hot gases is stopped, the systern will cool to ambient temperature in about minutes I
  • the volume of gases within the flare stack at atmospheric pressure would decrease proportionately to the absolute temperature to approximately 1700 cubic feet.
  • air will be drawn into the stack in the amount of 2400 minus 1700 or approximately 700 cubic feet. This would cause an air penetration down the stack of approximately 150 feet. Since this column of air wouldv travel for approximately 15 minutes it cor- 30 inch stack would require about 700 cubic feet of purge gas, or to provide a margin of safety, approximately 800 cubic feet each 15 minutes.
  • the hourly volume would be about 3200 SCFH.
  • purge or sweep gas are used interchangeably.
  • gas can be any substance which is in gaseous phase at any temperature to which it may be subjected in this system.
  • purge gases are methane, ethane, propane, and nitrogen, but other gases such as argon can be used.
  • the purpose of the use of purge gases in flare systems is to avoid allowing a static, or reversed flow, in the entire flare system and to always maintain some small flow toward the discharge point of the flare system.
  • the flare system does not become dangerous until such time as air or oxygen is present within the system; If the system flow is allowed to reverse,'air is drawn into the system and there is immediate hazard of explosion or detonation, whenever normal forward flow is reestablished andthe air-gas mixture meets the pilot flame.
  • the purge rate of 0.05 feet per second is considered satisfactory for a drop in system temperature of 20F in 15 minutes (such as from F. to 60F.) But, if the temperature drop should be 40 F. in 15 minutes it is necessary to increase purge gas volume to maintain the same condition of flare safety because the gas volume is proportional to absolute temperature at the same 3 pressure condition.
  • FIGS. 2 aha 3 illustrate the situation where there is no water seal in the flare systein, but the flare gas is controlled specifically'by the temperature in the flare system and the pressure in the flare system.
  • FIG. 1 there is shown a flare system indicated generally by the numeral 10; a purge gas system indicated generally by the numerallZ, and a pressure control system indicated generally by the numeral 14.
  • the system of FIG. 1 includes as part of the flow system, a water seal in the base of the flare stack wherein a column of water 28 has immersed in it, the flare gas conduit 24 which has a downwardly depending portion 26 immersed in the water toa depth H.
  • the depth H is sufficient so that there'is substantially no danger that the water level will be drawn down to the point where gas in thestack-can leak back into the conduit 24.
  • the base of the stack 16 rests on the grade surface 46 and comprises a plurality. of sections 18 terminating at the top opening 22.
  • flare stack and the pressure of the gas in the flare stack 'toso control the flow of purge gas as to prevent any entry of air into thestack through the opening 22, and to provide thiscontrotwith a minimum total flow of purge gas, for the purpose of fuel and cost saving.
  • a temperature sensor 48 which can be of a thermistor, thermocouple, capillary, or other type in accordance with the teachings of US. Pat. No. 3,741,743 is inserted into the-flare stack 16 18. With a suitable control means 50, as well known in the .art, a signal is sent to a thermal controlller T indicated by numeral 52.
  • the pressure switch 56 prevents the passage of signal from the temperature controller 52 to the valve, so the valve remains closed.
  • the pressure switch 56 closes permitting the signal from thethermal' control 52 to control the valve 58 and cause purge gas to flow into the flare stack.
  • the purgegas flows and as the gas in the flare stack cools the temperature indicated by sen sor 48 eventually reaches normal value and the thermal control 52 causes the valve 58 to .close and cut the flow of purge gas to the stack.
  • FIG. 1 the control system indicated by numeral 12 employing thermal and pressure switches provides a more controlled flow of purge gas in accordance with the temperature and pressure in the stack than does the prior art.
  • FIG. I shows also an additional feature which has been used in prior art systems namely of the water seal at 28.
  • FIG. 1 there is a further control indicated by numeral 14 which, as needed, delivers a flow of purge gas in to the conduit 24 to maintain pres sure. This involves the pressure switch 34 and control valve 40.
  • Pressure in 24 should always be above atmospheric pressure to avoid leakage-entry of air to 24; also to avoid withdrawing water 28 from the base of 16 which can occur if initial gas temperature is high enough as gas flow ceases. Normal pressure in 24 is greater than atmospheric.
  • the system indicated by 14 incorporates means to admit purge gas from substantial pressure to 24 when the pressure internal of 24 falls to just above atmospheric pressure.
  • Pressure switch P senses the internal pressure of 24 through 32. As the pressure internal of 24 falls for any reason to near atmospheric pressure, the switch P 34) closes. Power from 36 then is applied through 38 to a gas valve 40 which then opens to allow passage of purge gas from 42 to 44 and thence to 24 for immediate restoration of pressure within 24.
  • the control valve 58 is preferably one in which the rate of flow of purge gas through the valve from pipe 60 to pipe 62 is variably controlled in accordance with the temperature difference between the sensor temperature and the preselected ambient temperature, so that as the temperature difference increases the rate of flow of purge gas increases proportionately.
  • the type of to line 44 However, when flow ceases in 24 and pressure inside 24 falls to just above atmospheric for some reason, controls 14 immediately admit purge gas from 42 through 40 and 44 to 24 for immediate restoration of pressure in 24. Control of the rate of flow of purge gas through valve 40 is not precisely controlled as is the fb w through valve 58.
  • FIGS. 2 and 3 there is shown a modification of the system of FIG. 1 in which the water trap comprising the water .column 28 and inverted conduit 26, is 'not presem and the entire control of purge gas is by asystem similar to that indicated generally by numeral 12 in FIG. 1.
  • a pressure lead 74 connected from the conduit 72 to a pressure switch 56 interposed between the temperature controller 52 and the valve 76.
  • the temperature sensor 48 controls the valve 76 as a function of the temperature measured.
  • the control signal from the thermal controller 52 is controlled further by the pressure switch 56 responsive to the pressure in the conduit 72 which is indicated on lead 74.
  • the pressure switch 56 is closed and transmits the signal from the thermal controller 52 to the valve 76 permitting a controlled flow of purge gas through line 80 into the conduit 72 and to the stack.
  • the pressure in the conduit 72 is high and the temperature at 48 is also high, indicating that there is a flow or flare gas at that time, there is no need for purge gas so thatthe pressure switch 56 will open and prevent the signal from the thermal controller reaching the valve 76.
  • FIG. 3 is shown a system similar to that of FIG. 2 except that it uses a type of thermal sensor which is a liquid-filled capillary type of sensing device well known in the art.
  • the type of thermal control 88 would be different from the control 52 inasmuch as the thermal sensor 86 is different from that of 48.
  • the commercial devices which are available on the market provide the proper control between temperature and switch opening and closing, so that with the proper control device any one of the conventional types of thermal sensors can be used, as is well known in the art.
  • control system is shown as a series of separate elements, such as sensor 48, sensor control 50, lead 57, temperature controller 52, pressure switch 56 and valve 76, these elements could be combined in any desired way to provide the equivalent, overall system. Irrespective of the individual elements and their names, etc., the novelty of this system resides in the dual control of purge gas based on the temperature and the pressure in the flare system. It also includes proportional control of the purge gas based on temperature difference.
  • FIG. 1 where there is a water-seal formed by immersion of 26 in 28 to depth H, immersion is critical to avoid reversed gas flow from the interior of 16 above 28.
  • a level indicating device 30 is provided. Visual check of level at 30 is a gesture toward safety but in the absence of visual check, an alarm can be sounded when the level of 28 falls because of leakage, drainage or other cause. Any typical alarm device can be used.
  • the element 30 can also be adapted, by means commercially available, for addition of water to 28 if it is needed for any reason and as it is needed normally.
  • the temperature-pressure activiated purge gas flow system for waste gas flares comprising;
  • a flare gas system including flare stack conduit means to introduce flare gas into said stack, pilot ignition means and means to introduce purge gas into said system;
  • control valve means responsive to said means to control the flow of purge gas into said system.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
  • Chimneys And Flues (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Gas Burners (AREA)
US502159A 1974-08-30 1974-08-30 Temperature-pressure activated purge gas flow system for flares Expired - Lifetime US3901643A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US502159A US3901643A (en) 1974-08-30 1974-08-30 Temperature-pressure activated purge gas flow system for flares
GB30255/75A GB1490591A (en) 1974-08-30 1975-07-18 Temperature pressure activated purge gas flow system for flares
NLAANVRAGE7509255,A NL177774C (nl) 1974-08-30 1975-08-04 Fakkelbrander.
CA233,451A CA1053137A (en) 1974-08-30 1975-08-14 Temperature pressure activated purge gas flow system for flares
DE2537351A DE2537351C2 (de) 1974-08-30 1975-08-21 Fackelkamin
IT51092/75A IT1041543B (it) 1974-08-30 1975-08-28 Apparecchiatura di alimentazione di gas di spurgo per camini a torcia
JP50104862A JPS5150036A (en) 1974-08-30 1975-08-29 Paajigasuryudosochi
FR7526718A FR2283396A1 (fr) 1974-08-30 1975-08-29 Installation de reglage du debit de gaz de purge envoye dans une torche de brulage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US502159A US3901643A (en) 1974-08-30 1974-08-30 Temperature-pressure activated purge gas flow system for flares

Publications (1)

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US3901643A true US3901643A (en) 1975-08-26

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US502159A Expired - Lifetime US3901643A (en) 1974-08-30 1974-08-30 Temperature-pressure activated purge gas flow system for flares

Country Status (8)

Country Link
US (1) US3901643A (nl)
JP (1) JPS5150036A (nl)
CA (1) CA1053137A (nl)
DE (1) DE2537351C2 (nl)
FR (1) FR2283396A1 (nl)
GB (1) GB1490591A (nl)
IT (1) IT1041543B (nl)
NL (1) NL177774C (nl)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994663A (en) * 1975-11-28 1976-11-30 John Zink Company Method and apparatus to prevent air flow inversion in flare stacks
US4101261A (en) * 1977-02-17 1978-07-18 Combustion Unlimited Incorporated Flare gas stack with purge gas conservation system
US4214880A (en) * 1977-05-03 1980-07-29 Kamphorst Hendrik A Liquid seal system, e.g. for a flare stack
US4265611A (en) * 1979-03-15 1981-05-05 John Zink Company Control system for purge gas to flare
US4559006A (en) * 1984-06-22 1985-12-17 Mcgill Incorporated Purging process
US4634369A (en) * 1984-06-22 1987-01-06 Mcgill Incorporated Purging process
US5386080A (en) * 1992-12-22 1995-01-31 Thermotech Systems Corporation Apparatus and methods for controlling high temperature gases
EP0645585A2 (de) * 1993-09-17 1995-03-29 Linde Aktiengesellschaft Verfahren zum Betreiben einer Tauchung und Tauchung
US5829964A (en) * 1997-06-16 1998-11-03 Pegasus International Inc. Flare line gas purge system
US20060240368A1 (en) * 2005-04-26 2006-10-26 Heat Recovery Systems, Llc Gas induction bustle for use with a flare or exhaust stack
US20060240369A1 (en) * 2005-04-26 2006-10-26 Heat Recovery Systems, Llc Waste heat recovery system
WO2008055829A1 (en) * 2006-11-08 2008-05-15 Nv Bekaert Sa Modular flare stack and method of flaring waste gas
US8585869B1 (en) 2013-02-07 2013-11-19 Heartland Technology Partners Llc Multi-stage wastewater treatment system
US8679291B2 (en) 2007-03-13 2014-03-25 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US8721771B2 (en) 2011-01-21 2014-05-13 Heartland Technology Partners Llc Condensation plume mitigation system for exhaust stacks
US8741101B2 (en) 2012-07-13 2014-06-03 Heartland Technology Partners Llc Liquid concentrator
US8741100B2 (en) 2007-03-13 2014-06-03 Heartland Technology Partners Llc Liquid concentrator
US8790496B2 (en) 2007-03-13 2014-07-29 Heartland Technology Partners Llc Compact wastewater concentrator and pollutant scrubber
US8801897B2 (en) 2007-03-13 2014-08-12 Heartland Technology Partners Llc Compact wastewater concentrator and contaminant scrubber
US8808497B2 (en) 2012-03-23 2014-08-19 Heartland Technology Partners Llc Fluid evaporator for an open fluid reservoir
US8967995B1 (en) * 2013-08-14 2015-03-03 Danny Edward Griffin High-efficiency dual flare system
US9199861B2 (en) 2013-02-07 2015-12-01 Heartland Technology Partners Llc Wastewater processing systems for power plants and other industrial sources
US9296624B2 (en) 2011-10-11 2016-03-29 Heartland Technology Partners Llc Portable compact wastewater concentrator
WO2017092027A1 (zh) * 2015-12-04 2017-06-08 深圳智慧能源技术有限公司 基于燃料成份的压力控制固定值调整***
US9808738B2 (en) 2007-03-13 2017-11-07 Heartland Water Technology, Inc. Compact wastewater concentrator using waste heat
US10005678B2 (en) 2007-03-13 2018-06-26 Heartland Technology Partners Llc Method of cleaning a compact wastewater concentrator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58164919A (ja) * 1982-03-26 1983-09-29 Ishikawajima Harima Heavy Ind Co Ltd フレアスタツクの爆鳴気発生防止装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2779399A (en) * 1952-02-29 1957-01-29 Zink Co John Flare stack gas burner
US3578892A (en) * 1968-03-21 1971-05-18 Airoil Burner Gaseous sealing devices
US3658482A (en) * 1970-09-08 1972-04-25 College Research Corp Afterburner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3741713A (en) * 1972-03-10 1973-06-26 Zink Co John Purge gas admission control for flare system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2779399A (en) * 1952-02-29 1957-01-29 Zink Co John Flare stack gas burner
US3578892A (en) * 1968-03-21 1971-05-18 Airoil Burner Gaseous sealing devices
US3658482A (en) * 1970-09-08 1972-04-25 College Research Corp Afterburner

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994663A (en) * 1975-11-28 1976-11-30 John Zink Company Method and apparatus to prevent air flow inversion in flare stacks
US4101261A (en) * 1977-02-17 1978-07-18 Combustion Unlimited Incorporated Flare gas stack with purge gas conservation system
US4139339A (en) * 1977-02-17 1979-02-13 Combustion Unlimited Incorporated Flare gas stack with purge control
US4214880A (en) * 1977-05-03 1980-07-29 Kamphorst Hendrik A Liquid seal system, e.g. for a flare stack
US4265611A (en) * 1979-03-15 1981-05-05 John Zink Company Control system for purge gas to flare
US4559006A (en) * 1984-06-22 1985-12-17 Mcgill Incorporated Purging process
WO1986000392A1 (en) * 1984-06-22 1986-01-16 Mcgill Incorporated Purging process
US4634369A (en) * 1984-06-22 1987-01-06 Mcgill Incorporated Purging process
US5386080A (en) * 1992-12-22 1995-01-31 Thermotech Systems Corporation Apparatus and methods for controlling high temperature gases
EP0645585A2 (de) * 1993-09-17 1995-03-29 Linde Aktiengesellschaft Verfahren zum Betreiben einer Tauchung und Tauchung
EP0645585A3 (de) * 1993-09-17 1995-08-23 Linde Ag Verfahren zum Betreiben einer Tauchung und Tauchung.
US5829964A (en) * 1997-06-16 1998-11-03 Pegasus International Inc. Flare line gas purge system
US8459984B2 (en) 2005-04-26 2013-06-11 Heartland Technology Partners Llc Waste heat recovery system
US20060240369A1 (en) * 2005-04-26 2006-10-26 Heat Recovery Systems, Llc Waste heat recovery system
US7442035B2 (en) 2005-04-26 2008-10-28 Gei Development, Llc Gas induction bustle for use with a flare or exhaust stack
US20090053659A1 (en) * 2005-04-26 2009-02-26 Gei Development Llc Gas induction bustle for use with a flare or exhaust stack
US8172565B2 (en) 2005-04-26 2012-05-08 Heartland Technology Partners Llc Gas induction bustle for use with a flare or exhaust stack
US20060240368A1 (en) * 2005-04-26 2006-10-26 Heat Recovery Systems, Llc Gas induction bustle for use with a flare or exhaust stack
WO2008055829A1 (en) * 2006-11-08 2008-05-15 Nv Bekaert Sa Modular flare stack and method of flaring waste gas
US20090233248A1 (en) * 2006-11-08 2009-09-17 Nv Bekaert Sa Modular flare stack and method of flaring waste gas
US8282389B2 (en) * 2006-11-08 2012-10-09 Nv Bekaert Sa Modular flare stack and method of flaring waste gas
US8801897B2 (en) 2007-03-13 2014-08-12 Heartland Technology Partners Llc Compact wastewater concentrator and contaminant scrubber
US10005678B2 (en) 2007-03-13 2018-06-26 Heartland Technology Partners Llc Method of cleaning a compact wastewater concentrator
US11376520B2 (en) 2007-03-13 2022-07-05 Heartland Water Technology, Inc. Compact wastewater concentrator using waste heat
US10946301B2 (en) 2007-03-13 2021-03-16 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US8741100B2 (en) 2007-03-13 2014-06-03 Heartland Technology Partners Llc Liquid concentrator
US8790496B2 (en) 2007-03-13 2014-07-29 Heartland Technology Partners Llc Compact wastewater concentrator and pollutant scrubber
US10596481B2 (en) 2007-03-13 2020-03-24 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US10179297B2 (en) 2007-03-13 2019-01-15 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US8679291B2 (en) 2007-03-13 2014-03-25 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US9926215B2 (en) 2007-03-13 2018-03-27 Heartland Technology Partners Llc Compact wastewater concentrator and pollutant scrubber
US9808738B2 (en) 2007-03-13 2017-11-07 Heartland Water Technology, Inc. Compact wastewater concentrator using waste heat
US9617168B2 (en) 2007-03-13 2017-04-11 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US8721771B2 (en) 2011-01-21 2014-05-13 Heartland Technology Partners Llc Condensation plume mitigation system for exhaust stacks
US9296624B2 (en) 2011-10-11 2016-03-29 Heartland Technology Partners Llc Portable compact wastewater concentrator
US9943774B2 (en) 2012-03-23 2018-04-17 Heartland Technology Partners Llc Fluid evaporator for an open fluid reservoir
US8808497B2 (en) 2012-03-23 2014-08-19 Heartland Technology Partners Llc Fluid evaporator for an open fluid reservoir
US8741101B2 (en) 2012-07-13 2014-06-03 Heartland Technology Partners Llc Liquid concentrator
US9199861B2 (en) 2013-02-07 2015-12-01 Heartland Technology Partners Llc Wastewater processing systems for power plants and other industrial sources
US8585869B1 (en) 2013-02-07 2013-11-19 Heartland Technology Partners Llc Multi-stage wastewater treatment system
US8967995B1 (en) * 2013-08-14 2015-03-03 Danny Edward Griffin High-efficiency dual flare system
WO2017092027A1 (zh) * 2015-12-04 2017-06-08 深圳智慧能源技术有限公司 基于燃料成份的压力控制固定值调整***

Also Published As

Publication number Publication date
DE2537351A1 (de) 1976-03-11
IT1041543B (it) 1980-01-10
JPS5150036A (en) 1976-05-01
FR2283396B1 (nl) 1979-05-25
NL7509255A (nl) 1976-03-02
FR2283396A1 (fr) 1976-03-26
NL177774B (nl) 1985-06-17
GB1490591A (en) 1977-11-02
DE2537351C2 (de) 1983-10-27
JPS5723848B2 (nl) 1982-05-20
CA1053137A (en) 1979-04-24
NL177774C (nl) 1985-11-18

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