WO2021170898A1 - Procédé et dispositif de purification de gaz de combustion contenant de fines particules - Google Patents

Procédé et dispositif de purification de gaz de combustion contenant de fines particules Download PDF

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Publication number
WO2021170898A1
WO2021170898A1 PCT/FI2020/050119 FI2020050119W WO2021170898A1 WO 2021170898 A1 WO2021170898 A1 WO 2021170898A1 FI 2020050119 W FI2020050119 W FI 2020050119W WO 2021170898 A1 WO2021170898 A1 WO 2021170898A1
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WO
WIPO (PCT)
Prior art keywords
flue gas
water
flue
pipes
evaporation
Prior art date
Application number
PCT/FI2020/050119
Other languages
English (en)
Inventor
Petteri Mikko Samuli PENTTINEN
Original Assignee
21Tdmc Group Oy
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 21Tdmc Group Oy filed Critical 21Tdmc Group Oy
Priority to PCT/FI2020/050119 priority Critical patent/WO2021170898A1/fr
Publication of WO2021170898A1 publication Critical patent/WO2021170898A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/005—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for draining or otherwise eliminating condensates or moisture accumulating in the apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/14—Evaporating with heated gases or vapours or liquids in contact with the liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/05—Separating dispersed particles from gases, air or vapours by liquid as separating agent by condensation of the separating agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
    • B01D5/006—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with evaporation or distillation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/0205—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • 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
    • B01D53/26—Drying gases or vapours
    • B01D53/265—Drying gases or vapours by refrigeration (condensation)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/10—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for stationary applications
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00—Preventing emissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00—Treatment devices
    • F23J2219/70—Condensing contaminants with coolers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/30—Technologies for a more efficient combustion or heat usage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a method for purifying flue gas con taining fine particles as defined in the preamble of claim 1, and to an apparatus for purifying flue gas containing fine particles as defined in the preamble of claim 8.
  • the method and apparatus according to the invention are also referred to as the solution according to the invention.
  • the present invention relates to a method and apparatus for purifying flue gas containing fine particles, in which method the flue gas is cooled to below the condensation point of water vapour.
  • the fine particles in the flue gas are bound to con densed water drops or droplets with which the fine particles are collected from the flow of flue gas. Combustion produces impurities that are detrimental to nature and people. Recently, fine particle emissions have received much attention.
  • the matter concerns heating units of all sizes, i.e. from the size of the boiler in a one-family house to large power plants. In large units, electric filters are used, but these become very expensive at a small scale.
  • Another alternative is various kinds of flue-gas washers in which water is sprayed to the flue gas flow, which water col lects fine particles and other impurities. Sprayed water drops to the bottom of the washer, from where it is pumped again in the cycle.
  • Finnish patent No. FI108404 discloses a flue-gas washer, which also recovers heat.
  • the flue gases are strongly cooled in washing and correspondingly the wash water heats up.
  • the heat can be easily led to a desired point of use achieving a much higher energy efficiency.
  • Systems exploiting the higher thermal value have not become widely used due to their expense.
  • it was held to be axiomatic that the final temperature of flue gases must not drop below the boundary temperature typical for the fuel, so that a condensation would not occur in either the boiler or the chimney.
  • a combustion plant also requires a chimney and a washer or an electric filter or similar between them.
  • the present invention is based largely on the insight that there is a considerable amount of water in flue gases. Though a sufficient amount of water for operation according to the invention is created purely as a result of combustion, moisture in the fuel will increase the amount of water in the flue gases, which can be taken into account in the design of the cleaning device. The fine particles, fly ash, and chemical compounds in the flue gas, which condense at a temperature of lower than 40°C at normal pressure, can be removed from flue gases using this method.
  • the condensation of flue gas is an undesirable phe nomenon, as it causes disintegration and corrosion in the chimney and other duct components and leads to noxious waste.
  • the water vapour of the flue gas is exploited by condensing and evaporating it in a cycle repeatedly.
  • the water obtained in the condensation is repeatedly vaporised with the heat of the flue gas and condensed back to water in the heat-exchanger which allows a significant energy recovery from the system.
  • the method of the invention creates a closed cycle of water that cumulates water in the cycle during the combustion.
  • the cumulated water in the system is repeatedly attached to impu rities in the flue gas and thereby rinsing down the particles in the flue gas.
  • the amount of the water in the cycle can be controlled by controlling the efficiency of the combustion or cooling in the heat-exchanger or draining the water through the exit pipe.
  • the method results clean water and waste in a solid form, which can be easily disposed of.
  • the invention comprises a vertical-type heat exchanger, in which water drops or droplets fall down because of gravity.
  • the fine particles of the flue gas act as condensation surfaces or condensation nuclei, to which the cooled water molecules adhere as liquid. This is a question of a so-called diffusion phoretic deposition. Once enough condensation has accumulated, drops start to form and fall despite the flue gas flows up wards. It is obvious that the height of the heat exchanger, the efficiency of the cooling, the flow velocity, and some other technical factors in the heat exchanger will affect how much condensate will be condensed and collected from the water vapour in the flue gas.
  • the method according to the invention can be applied to small and medium-sized combustion units and plants using all kinds of fuels, as well as to stationary engines.
  • Examples of appli cations include heating boilers in one-family houses, district heating plants, generating stations, and for instance, engines of ships.
  • One preferred device-technical embodiment is a chimney con struction, in which the flue gas is led in one or more pipes through a cooling-water chamber, to condense the vapour in the flue gas to water drops for the fine particles of the flue gas to adhere.
  • the condensing vapour will attach to small impurity particles while becoming to water. In this way the flue gas is cleaned.
  • the condensed water including the wanted impurity particles falls to the opposite direction compared to the flue gas flow.
  • the descending water drops fall on heat conductive hot elements which elements are heated by the flue gas flow.
  • the solution according to the invention comprises a vaporisa- tion-condensing cycle where the water and energy is harvested from the combusting material with the help of resulting flue gas.
  • the vaporisation-condensing cycle of the water is re peated, and the amount of the water will cumulate to a certain balanced level in the cycle. The balance level is depending on the temperature, pressure and the cumulated humidity inside the system.
  • the heat conductive elements are heated by the flue gas and they act as evaporating surfaces for the water.
  • the solution of the invention needs no external energy or water to purify the flue gas.
  • the construction of solution according to the invention is simple and economical because external washer structures with external electric energy are not needed.
  • the flue gas leaves the chimney low in particles and energy, because the invention recovers the energy of the flue gas to heating energy and collects the particles inside the evaporat ing chamber.
  • the construction is integrated in one structure.
  • One advantage is a good self-cleaning of the chimney structure because the water is evaporated several times.
  • the use of the device will cut fuel consumption in heating by an average of 20%, as the higher thermal value of the fuel can be exploited.
  • the method solves the fine particle problems caused by the small-scale combustion.
  • the reduction in fine particle emissions is 50 % or greater.
  • the present invention is intended to create an entirely new method and apparatus for binding fine particles and for gen erally reducing emissions from flue gases of combustion.
  • the method for purifying flue gas containing fine particles ac cording to the invention is characterized by what is presented in the characterization part of claim 1.
  • the apparatus for purifying flue gas containing fine particles according to the invention is characterized by what is pre sented in the characterization part of claim 8.
  • Other embodi ments of the invention are characterized by what is presented in the other claims. LIST OF FIGURES
  • Fig. 1 shows in a side view and partially cross-sectioned a chimney cleaner according to the invention, in connec tion with a heating boiler
  • Fig. 2 shows in a side view and cross-sectioned an evaporating chamber of the cleaner of Fig. 1, together with its evaporation plates
  • Fig. 3 shows in a top view a cross-section of a heat exchanger used in the invention
  • Fig. 4 shows in a side view a cross-section A-A according to Fig. 3.
  • Figure 1 and 2 present a chimney cleaner 1 according to the invention.
  • Figure 1 presents the chimney cleaner 1 in connec tion with a heat exchanger 3 comprising a cooling medium space or water space 3a, a heating boiler 6 and a blower unit 3b that is connected by two tubes 3c and 3d to the heat exchanger 3 to form a cooling circuit which provide cooling water.
  • Figure 2 presents an evaporation chamber 4 used in the solution ac cording to the invention.
  • the flue gas purifying device 1 or shorter the cleaner 1 according to the invention is connected to an apparatus producing heat, for example to a heating boiler 6 of a building.
  • the cleaner 1 is built inside the chimney 2, for which a feed-through has been made in the roof 2a.
  • the chimney 2 comprises a heat exchanger component 3 or shorter a heat exchanger 3.
  • the heat exchanger 3 has an elongated vertical structure.
  • the water space 3a of the heat exchanger 3 is a substantially closed space inside the chimney 2 for a cooling medium, such as water.
  • a vent pipe 10 extends to the very top of the water space 3a of the heat exchanger 3. It can be used to remove air that collects on top of the water space 3a.
  • the chimney 2 with the heat exchanger 3 and the evaporating chamber 4 are insulated with a conventional insulated arrangement, for example with an insulator layer 2b and a shell of sheet metal outside the insulator layer 2b.
  • the apparatus comprises flue gas pipes 5 for the flue gas 7 of the heating boiler 6 which flue gas pipes 5 are placed inside the chimney 2 through the water space 3a of the heat exchanger 3.
  • the heat exchanger 3 gets its heat from the flue gas 7 which flows upwards in the flue gas pipes 5.
  • the flue gas pipes 5 are vertical.
  • the cooling of the heat exchanger 3 is implemented locally in a suitable manner.
  • the example as shown in Figure 1 shows a blower unit 3b, which produces heat, for example, for an air heating system.
  • a blower unit 3b which produces heat, for example, for an air heating system.
  • the heat exchanger 3 operates on the parallel-flow principle, in which the flue gas 7 cools and the circulating cooling water in the water space 3a heats as they both rise upwards.
  • the cooling water is led to the water space 3a with the help of a pump 8 substantially at the lower end of the water space 3a through an input tube 3c.
  • the input tube 3c is connected between the blower unit 3b and the heat exchanger 3 at the lower end of water space 3a so that the cold cooling water flows substantially upwards inside the water space 3a to the same direction as the flue gas 7.
  • the open first end or upper end of the return tube 3d is placed inside the water space 3a near the top of the water space 3a.
  • the second end of the return tube 3d is connected to the blower unit 3b.
  • the flue gas 7 After leaving the heating boiler 6 the flue gas 7 enters the evaporation chamber 4, where it gets in contact with a group of evaporating elements 4a.
  • the evaporating elements 4a are plate like metal elements. The flue gas 7 cools down in contact with the evaporating elements 4a and the evap orating elements 4a are therefore heated by the flue gas 7.
  • the lower ends of the flue gas pipes 5 are in connection with the upper part of the evaporation chamber 4, and in the upper part of the evaporation chamber 4 the flue gas 7 is led inside the flue gas pipes 5 to flow through the flue gas pipes 5 inside the heat-exchanger 3, and finally out from the flue gas pipes 5 on top of the chimney 2.
  • the temperature of the flue gas 7 has reduced down to about 40°C. All the water vapour in the flue gas 7 has at that stage condensed to water drops or droplets around fine impurity particles in the flue gas 7.
  • the flue gas 7 On its way up towards the flue gas pipes 5 the flue gas 7 has cooled down correspondingly and heated the group of evaporat ing elements 4a to different temperature levels. This has led to a process where condensed water travels downwards in the opposite direction to the flue gas 7 and collects impurities from the flue gas 7.
  • the water in the flue gas 7 condenses on the fine impurity parti cles comprised by the flue gas 7 substantially by the same mechanism as the clouds form in the sky.
  • the impurities 7b remain in the condensed water 7a.
  • the dirty condensation water 7a falls downwards and drops onto the heat conductive evapo- rating elements 4a.
  • the condensed water 7a vaporises again or fall a step down onto another heat conductive evaporating element 4a.
  • the evap orating elements 4a act as plates where the impurities 7b are collected.
  • the group of evaporation elements 4a which are positioned along the route of the flue gas 7 achieve different levels of tem perature and humidity at every evaporation element 4a. This allows various evaporation levels inside the evaporation cham ber 4 and the water cannot escape from the process.
  • the con densed water drops 7a that have dropped onto the evaporation element 4a can evaporate quickly, so that the impurities remain as a solid sediment of impurities 7b on the upper surface of the evaporation element 4a.
  • the solid sediments of impurities 7b are removed from the evaporation element 4a at regular intervals, for example, in connection with the sweeping of the boiler 6.
  • the chamber 4 can be opened and the said evaporation elements 4a cleaned.
  • the vapour evaporated from the evaporation elements 4a is led finally to the flue gas pipes 5 where it is condensed back to water.
  • the temperature of the evaporating element 4a, the hu midity rate of the flue gas 7 and pressure in the flue gas 7 defines the evaporating rate and condensing rate at each evap oration element 4a.
  • the evaporation of the water to water drops 7a is reversed in the heat exchanger 3 and the condensation is reversed on the evaporating element 4a with the help of thermal energy of the flue gas 7.
  • Figures 3 and 4 present the top part of the chimney 2 with the heat exchanger 3 inside the chimney.
  • Figure 3 presents in a top view a cross-section of the chimney 2 and the heat ex changer 3 used in the invention. The cross-section is taken above the evaporation chamber 4.
  • Figure 4 presents in a side view a cross-section A-A according to Figure 3.
  • the water space 3a belongs to the heat exchanger 3 and is installed inside the chimney 2.
  • nine flue gas pipes 5 are installed in the water space 3a of the heat exchanger 3 inside the chimney 2.
  • the amount of flue gas pipes 5 may also be different, for instance any suitable number from one onwards.
  • the upper end of the return tube 3d is also very high inside the water space 3a, whereas the first end of the input tube 3c is connected at the lower end of water space 3a so that the cold cooling water flows substantially upwards inside the water space 3a to the same direction as the flue gas 7.
  • the function of the cleaner 1 is advantageously based on the same mechanism by which clouds form in the sky.
  • the condensa tion of the moisture of the flue gas 7 onto the chimney struc ture or to the inner surface of the flue gas pipes 5 is mini mized, and only fine particles in the flue gas 7 form needed surfaces or nuclei for condensation.
  • Each small particle in the flue gas 7 represents a condensation nucleus for the water vapour of the flue gas 7 to condensate.
  • the water condensed from the flue gas 7 is re-evaporated sev eral times on the evaporation elements 4a which gives an ad vantage to achieve self-cleaning.
  • the meaning of the evapora tion elements 4a is substantially important.
  • the flow of the flue gas 7 is arranged as undisturbed as possible. Even a small turbulence may disturb the formation of the vapour cloud.
  • the basic principle of the invention differs from the devices according to the prior art which devices have washer mechanisms to spray the washing water with a great pressure to the flue gas, in which case the adhesion of the water and fine particles in the flue gas becomes more diffi cult.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

L'invention concerne un procédé et un appareil de purification de gaz de combustion (7) contenant de fines particules, dans lequel le gaz de combustion (7) est refroidie au-dessous du point de condensation de la vapeur d'eau et des fines particules dans le gaz de combustion (7) sont liées principalement à des gouttes d'eau (7a) qui, conjointement avec les fines particules, sont collectés à partir de l'écoulement de gaz de combustion (7), et dans lequel les gouttes (7a) sont créées dans un ou plusieurs tuyaux de gaz de combustion (5) principalement à partir de l'eau contenue dans le gaz de combustion (7) lorsqu'il se condense. Le gaz de combustion (7) est conduit vers un ou plusieurs tuyaux de gaz de combustion (5) à travers une chambre d'évaporation (4) où la température du gaz de combustion (7) est réduite.
PCT/FI2020/050119 2020-02-25 2020-02-25 Procédé et dispositif de purification de gaz de combustion contenant de fines particules WO2021170898A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2020/050119 WO2021170898A1 (fr) 2020-02-25 2020-02-25 Procédé et dispositif de purification de gaz de combustion contenant de fines particules

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2020/050119 WO2021170898A1 (fr) 2020-02-25 2020-02-25 Procédé et dispositif de purification de gaz de combustion contenant de fines particules

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WO2021170898A1 true WO2021170898A1 (fr) 2021-09-02

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1955755A2 (fr) * 2007-02-07 2008-08-13 Samuli Penttinen Procédé et dispositif pour purifier un gaz d'évacuation contenant des particules fines
WO2008129136A1 (fr) * 2007-04-23 2008-10-30 Beneq Oy Collecte de particules
US20190015771A1 (en) * 2016-01-11 2019-01-17 Sang Young Son Droplet generating device and droplet generating method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1955755A2 (fr) * 2007-02-07 2008-08-13 Samuli Penttinen Procédé et dispositif pour purifier un gaz d'évacuation contenant des particules fines
WO2008129136A1 (fr) * 2007-04-23 2008-10-30 Beneq Oy Collecte de particules
US20190015771A1 (en) * 2016-01-11 2019-01-17 Sang Young Son Droplet generating device and droplet generating method

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