WO2009022060A1 - Procédé pour améliorer la performance d'un réacteur à lit circulant, et réacteur à lit circulant apte à mettre en œuvre le procédé - Google Patents

Procédé pour améliorer la performance d'un réacteur à lit circulant, et réacteur à lit circulant apte à mettre en œuvre le procédé Download PDF

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Publication number
WO2009022060A1
WO2009022060A1 PCT/FI2008/050464 FI2008050464W WO2009022060A1 WO 2009022060 A1 WO2009022060 A1 WO 2009022060A1 FI 2008050464 W FI2008050464 W FI 2008050464W WO 2009022060 A1 WO2009022060 A1 WO 2009022060A1
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WO
WIPO (PCT)
Prior art keywords
fluidized material
return channels
channel
bed reactor
flow
Prior art date
Application number
PCT/FI2008/050464
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English (en)
Inventor
Seppo Ruottu
Original Assignee
Einco Oy
Ruottu, Lauri
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 Einco Oy, Ruottu, Lauri filed Critical Einco Oy
Publication of WO2009022060A1 publication Critical patent/WO2009022060A1/fr

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Classifications

    • 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 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
    • F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
    • F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue 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 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus

Definitions

  • the invention relates to a method for improving the performance of a circulating bed reactor, in which circulating bed reactor at least some of the heat, possessed by combustion gases evolving in the circulating bed reactor, transfers into a fluidized material adapted to circulate within the circulating bed reactor, and which circulating bed reactor comprises air distribution means, fuel supply means, a fluidization chamber, a riser chamber, a separator means for separating the fluidized material from combustion gases, a set of return channels by way of which the fluidized material is returnable back into the fluidization chamber, as well as heat transfer elements for the vaporization of water and/or for the superheating of vaporized water.
  • the invention also relates to a circulating bed reactor capable of implementing the method.
  • the circulating bed reactor refers to a system which comprises at least air distribution means, fuel supply means, a fluidization chamber, a riser chamber, as well as a cyclone separator and a set of return channels for a fluidized material adapted to circulate within the circulating bed reactor.
  • the circulating bed reactor it is also possible to speak about steam boilers provided with a fluidized material recycling feature, when dealing with a system intended for the vaporization and superheating of water, which is also known as a circulating fluidized bed furnace.
  • the walls of riser channels in circulating bed reactors, and generally in steam boilers, are in a cooled condition. What is meant by this is that the walls are fitted with heat transfer elements to receive heat from combustion gases, as well as with steam generators and superheaters. It is an objective to have the riser channel and the heat transfer elements dimensioned in such a way that, with a nominal power of the boiler and with a certain fuel or fuel mixture, the temperature would settle within a desired range in the riser chamber's upper part. Thus, when the operating conditions change, the temperatures in all parts of the riser channel will also change. Indeed, in steam boilers, the highest temperature of a riser channel is usually established between upper and lower parts of the riser channel in a difficult- to-predict manner. The riser channel's temperature fluctuations are a source of many problems, such as a deterioration of the combustion result, as a consequence of increased emissions and the soiling of heat transfer surfaces.
  • US patent 6,293,781 Bl discloses another method and apparatus for solving the foregoing problem. It concentrates on preventing compounds, which are problematic for heat transfer surfaces, from getting in contact with heat transfer surfaces by positioning the heat transfer surfaces in a bubbling fluidized bed located in the return channel of a circulating bed reactor. The solution is based on the fact that, at this stage, the fluidizing gas does not contain corrosive compounds as yet.
  • the fluidized material circulating in a circulating bed reactor i.e. a sand material intended for this purpose and having a certain grain size, is conveyed prior to a heat transfer element into a fluidized bed which does not include heat transfer surfaces.
  • this fluidized bed is to reduce the concentration of corrosive compounds upstream of a heat transfer element.
  • the fluidized gas flow can be divided in various ways in said fluidization chambers, also in vertical direction, for an optimum result.
  • One task of the present invention is to eliminate or alleviate these drawbacks found in the US patent 6,293,781 Bl.
  • Another essential objective is to avoid the above-mentioned corrosion problems and to enable a higher-than-before final temperature of superheated steam for improving electricity efficiency, as well as to enable superheated steam and reactor temperatures to remain more steadily than before at the set values thereof in diverse operating conditions.
  • the objective is to provide a solution much easier to control than before.
  • the method of the invention provides a way of protecting the heat transfer surfaces of both a vaporizer and particularly a superheater from harmful substances and compounds in a simple and simultaneously an energy-efficiency enhancing manner.
  • the solution is structurally simple, attractive in terms of its costs, and provides a distinct improvement in the efficiency of an energy production process, especially in the performance of electricity production.
  • the mechanical stress applied to heat transfer surfaces is decisively lesser than before and consequently the apparatus has a service life which is substantially longer than before.
  • the circulating bed reactor's riser channel be given a substantially adiabatic design.
  • the meaning of this is that, in the riser channel intended for combustion gases and located downstream of the fluidized bed, heat transfer to a significant extent only occurs between combustion gases flowing therein and a fluidized material, specifically its particles, rising up along with said gases.
  • the circulating bed reactor's riser channel is substantially heat-insulated, such that the thermal energy, contained in combustion gases flowing in the riser channel as well as being released in response to combustion reactions still going on therein, becomes engaged primarily with the combustion gases and with the fluidized material circulating by way of the riser channel. Consequently, the fluidized material is capable of being returned by way of a set of uncooled return channels at a temperature which is at least more or less constant, i.e. no loss of thermal energy is allowed to happen.
  • the fluidized material which is heating in the riser channel and, moreover, separated from the combustion gas flow by means of a separator device, such as a separator cyclone, disposed in engagement with an upper part of the riser channel, is delivered into a set of return channels provided for the fluidized material.
  • the fluidized material return channels disposed circumferentially around the riser channels, are now divided according to the invention into cooled and uncooled ones. A desired portion of the fluidized material flow is returned back into the fluidization chamber by deflecting it to flow through the cooled channels.
  • the hot fluidized material delivers some of its heat to heat transfer elements disposed in these channels.
  • the fluidized material can be regulated in terms of its flow rate and dwell time in the channels in order to achieve a desired heat flow from the fluidized material to the heat transfer elements.
  • That portion of the fluidized material which does not fit in to flow through the cooled return channels or which is just deflected to bypass the cooled return channels, can be simply returned in the form of an overflow into the uncooled channels and further directly back into the fluidization chamber at its hot temperature.
  • both vaporization and especially superheating take place by guiding the hot fluidized material, separated in the cyclone, to flow in contact with vaporizers and superheaters located in the set of return channels.
  • the cooled return channels can be designed in such a way that the hot fluidized material packs in the channels effectively in response to gravity alone and proceeds in the way of a homogeneous fluid flow downward at a desired rate controlled by appropriate regulation elements. Ensured at the same time is an efficient transfer of heat between fluidized material and heat transfer surfaces.
  • the packed fluidized material does not contain, in a harmful degree, for example gas bubbles appearing in a bubbling fluidized bed, which would have an impact on its fluid-like behavior and would inflict disturbances and confusion in the flow of sand material.
  • the packed sand is adaptable to flow by the action of gravity alone.
  • a smooth flow of fluidized material can also be assisted by the disposition and design of heat transfer elements.
  • the heat transfer surfaces are arranged in a parallel relationship with the fluidized material flowing direction.
  • heat transfer surfaces can be provided particularly on the wall faces of return channels.
  • FIG. 1 shows a circulating bed reactor of the invention in a view of vertical section
  • Fig. 2 shows a set of return channels of fig. 1 in a view of horizontal section along a sectional line A-A
  • Fig. 3 shows a second embodiment of the invention in a view of horizontal section consistent with fig. 2.
  • FIG. 1 there is illustrated one circulating bed reactor 1 embodying a solution according to the invention.
  • the combustion air is supplied by way of an assembly 31 into an air cabinet 34, from which it is delivered through a grate 30 into a fluidization chamber 4.
  • the fluidization chamber is also supplied with a fuel by way of a feed assembly 26, and non- fluidizing material is discharged therefrom by way of an outlet assembly 25.
  • a fluidized material 2 having established a fluidized bed 33 on the fluidization chamber's floor by means of the combustion air supplied through the grate 30, bubbles in a fluid-like behavior and, at the same time, the fluidized bed releases particles of the fluidized material along with combustion gas flows up towards a riser channel 7.
  • Proceeding simultaneously in the fluidized bed 33 is a process of drying and igniting a fuel mixed therewith, as well as ultimately also, to a large extent, of burning a residual carbon of the fuel.
  • the riser channel 7 is not provided with heat transfer elements and the flow therethrough proceeds in a substantially adiabatic manner.
  • the extra thermal energy which is already contained in combustion gases, as well as also releasing as a result of oxidation reactions and bonding to combustion gases, has a portion thereof transferring into a flow of fluidized material, which proceeds in the riser channel 7 and has become snatched from the bubbling fluidized bed 33 present on top of the grate 30 to join the combustion gas flows.
  • the heat flow to the riser channel's walls 73 is insignificant, and a cooling action in the riser channel is provided exclusively by particles of the fluidized material flowing therealong.
  • temperatures existing in the circulating bed reactor lie generally within the range between the temperature of the fluidization chamber 4 and that of the riser channel 7.
  • the temperature of the entire fluidization element 4 remains sufficiently high.
  • all temperatures observed in the riser chamber 7 settle within a desired temperature window.
  • the mixture of combustion gases and the fluidized material 2 finds its way from the riser channel 7 into a fluidized material separator device provided at the top thereof, in this case, for example, to a separator cyclone's vane system 8 arranged in an annular configuration relative to the riser channel. Thence, the combustion gases and the fluidized material proceed, while rotating tangentially relative to the riser channel, into a cyclone chamber 9. In response to radial and tangential velocities, the fluidized material migrates onto a wall of the cyclone chamber 9 while the combustion gases maintain the vortex motion and climb towards a central pipe 28 present in an upper part of the cyclone chamber 9 for a final exit therethrough.
  • a circulating bed reactor of the invention can also be adapted to implement the recovery of heat from combustion gases directly from the combustion gases as well. This is preferably carried out by means of extra heat transfer elements included for example in the cyclone chamber 9 or in subsequent process steps.
  • the fluidized material separated onto the cyclone wall trickles by way of a guide funnel 29 to a preferably annularly configured top part 18 of the set of return channels and thence into various return channels 17, 20, 21 of the set of return channels, which in this case are configured axial-symmetrically as a ring around the riser channel 7.
  • the return channels 17, 20, 21 are arranged to provide at least two, preferably mutually heat-insulated zones around the riser channel 7. In this embodiment, the disposition of channels is such that an inner position is occupied by the uncooled return channel 17 established by a continuous ring.
  • Outer positions are in this case occupied by the cooled return channels 20, 21 in a sector-like configuration, one 20 of which is here provided with the heat transfer surfaces of vaporizers 11 and the other 21 is provided with the heat transfer surfaces of superheaters 13.
  • a preferably annular thermal insulation 14 In view of blocking a transfer of heat from the uncooled return channel 17 to the steam-generating and superheating return channel 20, 21, there is further interposed between the same, in this case, a preferably annular thermal insulation 14.
  • the number of vaporizers, as well as that of superheaters, is by no means limited to any particular number or return channel 20, 21. Neither is the shape of the riser channel 7 restricted to a shape of circular cross-section, which is just one highly preferred embodiment of the invention.
  • the flow of fluidized material is distributed in desired proportions into the uncooled return channel 17, the steam-generating return channel 20, and the superheating return channel 21.
  • the steam-generating and superheating return channels have bottom ends thereof fitted with actuators 55 and 56, which are used for regulating the rates of fluidized material flows proceeding through said return channels in line with desired heat transfer rates.
  • the actuators 55 and 56 for the cooled return channels can be mechanical or pneumatic control equipment of the prior art.
  • a fluidized material flow in the uncooled return channel 17 will be determined as a difference between a total flow of fluidized material received in a preferably self-guided manner in the guide funnel 19 and the flows of fluidized material proceeding through the cooled return channels 20, 21.
  • the flow of material along the return channel 17 can preferably be implemented as a simple overflow, i.e. the portion of a fluidized bed material flow, which does not fit in the cooled return channels, is guided as such preferably either gravitationally or in an assisted manner into the uncooled return channel and returns at its hot temperature directly into the fluidization chamber 4.
  • the set of return channels be provided also at its inlet end with actuators, such that a flow rate into the channel 17 or a portion of the total flow can be adjusted irrespective of the amount of fluidized material being guided into the cooled return channels 20, 21 or the degree of fullness of the channels 20, 21.
  • the channels 17 need not necessarily consist of totally independent flow channels as in the embodiment of fig. 1. What is essential about uncooled return channels is to organize a return of the fluidized material 2 back into the fluidization chamber 34 without adapting the fluidized material to deliver any significant amount of its bonded thermal energy to its surroundings or to have the fluidized material returnable by way of the return channel 17 without a delivery of heat in a substantially adiabatic manner.
  • the return channels 17 can also be provided in a direct communication with the riser channel 7, as illustrated, for example, in the cross-section of fig. 3. In that case, the return channels 17 are separated from the riser channel 7 by means of separation walls 17b.
  • the fluidized material flows purely by gravity alone into return channels, becoming tightly packed therein.
  • a consequence of the fluidized material becoming tightly packed is that the combustion gas flow into cooled return channels is in all instances already insignificant as such. Neither is there any possibility of any significant vertical blending of gases taking place in the return channels.
  • the employed pure eventual flushing gas, rising counter-currently with respect to the fluidized material is able to clean the cooled return channel as effectively as possible.
  • flushing gas 40 for example combustion air functioning as secondary or tertiary air
  • the employed flushing gas may also consist of other gases or gas mixtures preferably as inert as possible. It is even conceivable to use a combustion gas, which has been cleaned of detrimental compounds and impurities.
  • the flushing gas is preferably preheated for improving energy economy, in the case of combustion air for example in a LUVO.
  • the amount of a necessary flushing gas is small and, if for example the above-mentioned actuators 55 and 56 for regulating the flow rates of a fluidized bed material are chosen to be pneumatic, just actuator air 24 needed thereby will be sufficient in most cases for blocking the admission of a combustion gas into the cooled return channels, thus eliminating the need for other flushing gas.
  • the amount and feeding pressure of a flushing gas is thus selectable, in terms of both the amount and the type of fluidized material present in the cooled return channels, in such a way that the flushing gas enables providing a controlled gas flow, which runs counter to the fluidized material flowing direction, yet, at the same time, retains its strength at such a level that, for example, the formation of gas bubbles typical of a fluidized bed, and the powerful upward migration thereof, is disabled at least to a substantial degree. What is ensured at the same time is a smooth flow of the fluidized material in the vicinity of heat transfer surfaces and also a mechanical wear of the heat transfer surfaces as little as possible.
  • an option is provided for reducing the internal load of a circulating bed reactor as a result of avoiding a fan power required by fluidization vaporizers and superheaters for a fluidizing gas or an abundant flushing gas.
  • a fluidized material separated by the cyclone 9 shall be distributed axial-symmetrically, whereby the uncooled return channels develop on top of themselves an axial-symmetric, sloping bed of fluidized material, which is almost independent of fluidized material flows in the cooled return channels.
  • the portion of fluidized material, which is not directed into the cooled return channels 20, 21, will be self-guided gravitational Iy as an overflow into the uncooled return channel 17. Being implemented like this, the flow of fluidized material, as far as the uncooled return channel is concerned, does not require any actuators. It does not need any sort of regulation and a sufficient supply of fluidized material for the cooled return channels is always ensured. In the uncooled return channel, most preferably, the fluidized material flows gravitationally and freely in an unpacked condition.
  • the fluidized material is able to fall freely by way of the return channel back in the fluidization chamber and into the fluidized bed.
  • This particular disposition of return channels also makes it possible that the uncooled return channel can have its flow rate fluctuating freely over a wide range without causing any trouble to the process in its operation.
  • the system will be simplified in terms of managing its flow technology, as the flow of fluidized material proceeds along all of the cooled return channels preferably in a packed condition and along the uncooled return channel in an unpacked condition.
  • the set of cooled return channels 20, 21 is adaptable to consist of just one, preferably annular channel, which has both superheating and vaporizing heat transfer elements disposed therein, or of several discrete channels, which only includes either vaporizing or superheating heat transfer elements or both.
  • the invention is able to provide also numerous other major benefits and improvements over prior known solutions. Since there is now provided a capability of effectively preventing the heat transfer surfaces from making contact with corrosive compounds contained in combustion gases, it is possible to increase a steam superheating temperature significantly from the current values, used primarily in the incineration of wastes. By virtue of this, the method according to the invention is capable of enhancing the electricity efficiency of a plant. In addition, because the fluidized material, which delivers heat to heat transfer surfaces, flows smoothly in its packed condition without applying a powerful abrasive grinding action to the heat transfer surfaces, the mechanical wearing of the heat transfer surfaces will be remarkably lesser than what it is in conventional heat transfer elements placed in a fluidized bed.
  • the wearing is further reduced by the fact that the actuators 55, 56 enable setting up the flow of fluidized material in the channels 20, 21 in a pulsed manner, i.e. the fluidized material advances over a desired displacement at a time and holds its position for a desired period before the next displacement.
  • the longevity of heat transfer elements can be significantly increased by means of solutions according to the invention.
  • the riser chamber must have its upper part 71 at a temperature of not lower than 850 0 C for ensuring an incineration process as complete and pure as possible.
  • the temperature of a fluidization chamber remains sufficiently high.
  • the fluidization chamber's adequate temperature is ensured in such a way that the flow of hot fluidized material in an uncooled return channel is upheld at a sufficiently high rate in all conditions.
  • the method according to the invention it is possible to make sure in a simple manner that a sufficient portion of the fluidized material migrating by way of the riser channel 7 shall be returned by way of the uncooled return channel 17 to a lower part of the riser channel 72.
  • the temperature of a fluidized portion remains at not lower than 750 0 C for ensuring a quick ignition of the fuel supplied into the fluidized bed.
  • the temperature of a fluidized portion is readily maintainable within the range of >800°C, whereby the reaction kinetics of burning is rapid, the emissions are minimized, yet the melting of ash is avoided.
  • the riser chamber in a method of the invention preferably does not include any heat transfer surfaces at all, meaning that such surfaces cannot become soiled or corroded under any circumstances. Because the vaporizer and superheater pipes do not end up in any sort of contact with a combustion gas, the temperature of heat transfer elements' external surfaces can be increased significantly from previously used values. By virtue of a method according to the invention, the temperature of superheated steam can thus be respectively increased to over 500° without problems.
  • Upholding a temperature consistent with waste incineration regulations in fluctuating process conditions can also be managed in a method of the invention in an easily controlled manner.
  • a preferred way of performing the adjustment is such that a flow of fluidized material passing through the vaporizer is controlled as a set value adjustment for the temperature of the upper part 71 of the riser channel 7. As the flow of fluidized material, having cooled in the vaporizer and returning to the fluidized portion, is reheated in the riser channel to a temperature consistent with the set value, it creates in the riser channel 7 an adiabatic cooling effect precisely equal to the vaporization efficiency.
  • the temperature of superheated steam is also maintainable in a fluctuating vapor stream at its set value by controlling a flow of fluidized material passing through the superheater 13 as a set value adjustment for the temperature of superheated steam.
  • the flow of fluidized material returning from the superheater to the fluidized portion also creates in the riser channel an accumulating, adiabatically effected cooling.
  • the cooling processes have a total effect such that the temperature of the riser channel's upper part 71 remains at its set value.
  • the vaporizer's automatic control system performs an opposite adjustment operation to compensate for whatever effect the change in the superheater has on the temperature of the riser channel's upper part. Accordingly, in a method according to the invention, the temperature of the riser channel's upper part 71 remains at its set value regardless of fluctuations in the superheater's vapor stream.
  • the solution according to the invention has a multi-beneficial effect also on the adjustability of a plant.
  • the riser channel's temperature remains now, more easily than before, within a set temperature window while the process conditions fluctuate over a wide range. At the same time, this is managed without the use of a booster fuel.
  • the activation of a steam boiler is facilitated as the superheater is not exposed to overheating prior to a commencement of the boiler's own steam generation, nor is there a separate auxiliary boiler needed for the protection of superheaters. Emissions are also minimized as temperatures existing in the fluidization chamber and in the riser channel remain at optimum values thereof and the combustion can be performed as completely as possible.
  • the riser channel does not include erosion-susceptible heat transfer surfaces
  • the flow rates of combustion gases can also be increased significantly with respect to rates used in traditional circulating bed reactors. This results in an expansion of the power control range available for the reactor.
  • the transfer of heat can be adjusted precisely over a highly extensive performance range.
  • the flow of fluidized material in the vaporizing return channel 20 is preferably controllable as a set value adjustment for a temperature Tl of the upper part of the riser channel 7, as shown in fig. 1. If Tl>set value, the flow of fluidized material will be increased by, and otherwise maintained the same or reduced, by the actuator 55. Respectively, the flow of fluidized material in the superheating return channel 21 is controllable as a set value adjustment for a temperature T2 of superheated steam. If T2>set value, the flow of fluidized material in the superheating return channel 21 will be reduced by, and otherwise maintained the same or increased, by the actuator 56.
  • the actuators 55 and 56 are most conveniently pneumatic, the controls thereof taking place for example by means of valves 22 and 23.
  • control system provides for a simple way of managing the flows of fluidized material in cooled return channels and in an uncooled one, and makes the system straightforward in terms of its configuration.
  • the arrangement in terms of control is such that the fluidized material present in the vaporizer and in the superheater is in a packed condition, as indicated by means of an arrow 27, and that its flow is regulated by means of sub-vaporizer and sub- superheater actuators, which are controlled intermittently such that the flow of fluidized material fluctuates between zero and a selected rate.
  • the described mode of control namely, enables obviating a few discovered practical problems relevant to applying a method according to the invention.
  • the most essential of such practically discovered problems consist of three phenomena as follows:
  • the regulating actuators 55, 56 are prone to accumulate coarse material, which undermines predictability of the actuators' control responses. Such enrichment is likely to occur both in mechanical as well as in pneumatic actuators.
  • the pulsed regulation is preferably implementable in such a way that the duration and strength of a control pulse are selected and the pulse rate is controlled as a set value adjustment of temperature. This method is highly applicable in terms of both a vaporizer and a superheater.
  • the operability of a plant can be improved to a degree that enables also an unmanned running of the plant and thereby reduced operating costs.
  • another advantage is a possibility of totally omitting a traditional injection adjustment of the superheater temperature.
  • Energy efficiency is also improved by a reduced internal load, as it has been possible to completely omit the fan power required by fluidization vaporizers and superheaters.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Abstract

L'invention porte sur un procédé pour améliorer la performance d'un réacteur à lit circulant, dans lequel au moins une partie de la chaleur est transférée dans un matériau fluidisé. Le procédé comprend la réalisation d'un ensemble de canaux de retour d'au moins un canal de retour refroidi, dans lesquels une partie de l'énergie thermique, possédée par le matériau fluidisé passant par celui-ci, est récupérée, ainsi que d'au moins un canal de retour non refroidi, dans lequel un écoulement du matériau fluidisé passant par celui-ci peut être adapté pour devenir sensiblement adiabatique, et le transport du matériau fluidisé dans l'ensemble de canaux de retour, de telle sorte que la différence entre un écoulement total du matériau fluidisé passant par le canal d'amenée et un écoulement du matériau fluidisé retournant par les canaux de retour refroidis peut être guidée dans le canal de retour non refroidi.
PCT/FI2008/050464 2007-08-16 2008-08-15 Procédé pour améliorer la performance d'un réacteur à lit circulant, et réacteur à lit circulant apte à mettre en œuvre le procédé WO2009022060A1 (fr)

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FI20075574 2007-08-16
FI20075574A FI20075574A0 (fi) 2007-08-16 2007-08-16 Menetelmä kiertomassareaktorin toiminnan parantamiseksi sekä menetelmän toteuttava kiertomassareaktori

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2012101324A1 (fr) 2011-01-24 2012-08-02 Endev Oy Procédé d'amélioration du fonctionnement d'un réacteur à masse circulante et réacteur permettant de mettre en œuvre un tel procédé
CN114950283A (zh) * 2022-06-24 2022-08-30 洛阳融惠化工科技有限公司 一种超细颗粒表面包覆的流化反应系统及其使用方法

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GB591417A (en) * 1945-02-05 1947-08-18 Standard Oil Dev Co Improved hydrocarbon conversion process and apparatus
US4552203A (en) * 1982-04-28 1985-11-12 Creusot-Loire Method and device for controlling the temperature of a reaction carried out in a fluidized bed
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WO2012101324A1 (fr) 2011-01-24 2012-08-02 Endev Oy Procédé d'amélioration du fonctionnement d'un réacteur à masse circulante et réacteur permettant de mettre en œuvre un tel procédé
CN103339442A (zh) * 2011-01-24 2013-10-02 恩迪夫公司 增强循环质量反应器操作的方法以及执行该方法的反应器
KR20140006906A (ko) * 2011-01-24 2014-01-16 엔데브 오이 순환 매스 반응기의 작동을 향상시키기 위한 방법 및 이러한 방법을 실시하기 위한 반응기
JP2014510248A (ja) * 2011-01-24 2014-04-24 エンデヴ オサケユキチュア 循環質量式反応器の作動を向上させる方法及び循環質量式反応器
US9470416B2 (en) 2011-01-24 2016-10-18 Endev Oy Method to enhance operation of circulating mass reactor and method to carry out such reactor
CN103339442B (zh) * 2011-01-24 2017-02-15 恩迪夫公司 增强循环质量反应器操作的方法以及执行该方法的反应器
KR101972502B1 (ko) 2011-01-24 2019-08-23 엔데브 오이 순환 매스 반응기의 작동을 향상시키기 위한 방법 및 이러한 방법을 실시하기 위한 반응기
CN114950283A (zh) * 2022-06-24 2022-08-30 洛阳融惠化工科技有限公司 一种超细颗粒表面包覆的流化反应系统及其使用方法
CN114950283B (zh) * 2022-06-24 2023-06-16 洛阳融惠化工科技有限公司 一种超细颗粒表面包覆的流化反应系统及其使用方法

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