WO2016056488A1 - Appareil d'accumulation de chaleur chimique - Google Patents

Appareil d'accumulation de chaleur chimique Download PDF

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Publication number
WO2016056488A1
WO2016056488A1 PCT/JP2015/078104 JP2015078104W WO2016056488A1 WO 2016056488 A1 WO2016056488 A1 WO 2016056488A1 JP 2015078104 W JP2015078104 W JP 2015078104W WO 2016056488 A1 WO2016056488 A1 WO 2016056488A1
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Prior art keywords
reactor
temperature
electric heater
reservoir
reaction medium
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PCT/JP2015/078104
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English (en)
Japanese (ja)
Inventor
康 佐竹
野口　幸宏
浩康 河内
Original Assignee
株式会社豊田自動織機
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Priority to JP2016553084A priority Critical patent/JPWO2016056488A1/ja
Publication of WO2016056488A1 publication Critical patent/WO2016056488A1/fr

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    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • the present invention relates to a chemical heat storage device.
  • a device described in Patent Document 1 As a conventional chemical heat storage device, for example, a device described in Patent Document 1 is known.
  • the chemical heat storage device described in Patent Document 1 is disposed on the entire outer surface of the diesel oxidation catalyst, and includes a reactor having a reaction material that chemically reacts with ammonia (NH 3 ), and an adsorbent that physically adsorbs NH 3.
  • An adsorber and a connection line for moving NH 3 between the reactor and the adsorber are provided.
  • NH 3 When the temperature of the exhaust gas discharged from the engine is lower than a predetermined temperature, NH 3 is moved from the adsorber to the reactor. Thereby, NH 3 and the reaction material chemically react to generate heat, and the heat is transmitted to the diesel oxidation catalyst.
  • the exhaust heat of the exhaust gas is given to the reaction material of the reactor, whereby NH 3 and the reaction material are separated, and the separated NH 3 is separated from the reactor. It is collected in the adsorber.
  • the amount of heat generated from the reaction material in the reactor is determined by the amount of NH 3 stored in the adsorber.
  • the amount of NH 3 stored in the adsorber is determined by the amount of NH 3 stored in the adsorber.
  • the exhaust heat is sufficiently reactive material of the exhaust gases, etc. If it can not be sufficiently recovered NH 3 in adsorber, are limited amount of NH 3 is stored in the adsorber If it is, the desired amount of heat cannot be generated from the reaction material, and as a result, there is a possibility that heating of the heating target becomes insufficient.
  • An object of the present invention is to provide a chemical heat storage device that can prevent insufficient heating of a heating target.
  • a chemical heat storage device includes a storage device that stores a reaction medium, and a reaction material that generates heat by a chemical reaction with the reaction medium and desorbs the reaction medium by heat storage, and cooperates with the storage device.
  • a reactor that heats the object to be heated, a supply pipe that connects the reservoir and the reactor so that the reaction medium can flow between the reservoir and the reactor, and a reactor adjacent to the reactor. And an electric heater for heating an object to be heated.
  • the reaction material when the reaction medium is supplied from the reservoir to the reactor through the supply pipe, the reaction material is caused by a chemical reaction between the reaction material of the reactor and the reaction medium. Generates heat. The heat is transmitted to the heating object, and the heating object is heated. At this time, when the heating target is insufficiently heated, the electric heater arranged adjacent to the reactor heats the heating target. This prevents the heating of the heating target from becoming insufficient.
  • the apparatus further includes a temperature detection unit that detects the temperature of the heating target, and a first heater control unit that controls ON / OFF of the electric heater when the reaction material generates heat.
  • the first heater control unit is controlled by the temperature detection unit. When the detected temperature of the heating target is lower than a predetermined temperature, the electric heater may be controlled to be turned on.
  • the electric heater when the temperature of the heating target is lower than the predetermined temperature, the electric heater is automatically turned on, and the heating target is heated by the electric heater. Thereby, it becomes easy and reliably prevented that the heating target is insufficiently heated.
  • the first heater controller is controlled by the valve controller. After the first predetermined time has elapsed since the control to open the heater, the electric heater may be controlled to be turned on when the temperature of the heating target detected by the temperature detection unit is lower than the predetermined temperature. .
  • the first heater control unit may perform control so that the electric heater is turned off after a second predetermined time longer than the first predetermined time elapses after the valve control unit controls the valve to open.
  • the electric heater is automatically turned off when the second predetermined time has elapsed since the valve was controlled to open. Therefore, the electric heater need not be turned on unnecessarily, and the power consumption can be further reduced.
  • the object to be heated is a fluid
  • the electric heater may be arranged adjacent to the reactor on the upstream side in the direction in which the fluid flows than the reactor.
  • the reaction medium When the heat of the fluid to be heated is applied to the reaction material of the reactor, the reaction medium is detached from the reaction material. The desorbed reaction medium returns to the reservoir through the supply pipe and is collected. At this time, the electric heater is disposed upstream of the reactor in the direction in which the fluid flows. For this reason, when the collection
  • a second heater control further comprising: an estimation unit that estimates an amount of the reaction medium in the reservoir; and a second heater control unit that controls ON / OFF of the electric heater when the reaction medium is detached from the reaction material.
  • the unit controls to turn on the electric heater when the amount of the reaction medium in the reservoir estimated by the estimation unit is smaller than a predetermined amount, and the amount of the reaction medium in the reservoir estimated by the estimation unit When is equal to or greater than a predetermined amount, the electric heater may be controlled to be turned off.
  • the amount of the reaction medium in the reservoir is estimated, and when the amount of the reaction medium in the reservoir is less than a predetermined amount, the electric heater is automatically turned on, and the object to be heated is set by the electric heater. Heated. This easily and reliably prevents the recovery of the reaction medium into the reservoir from becoming insufficient. Further, when the amount of the reaction medium in the reservoir is a predetermined amount or more, the electric heater is automatically turned off. Therefore, the electric heater need not be turned on unnecessarily, and power consumption can be reduced.
  • a chemical heat storage device that can prevent heating of a heating target from becoming insufficient.
  • FIG. 1 is a schematic configuration diagram illustrating an exhaust purification system including an embodiment of a chemical heat storage device.
  • FIG. 2 is a schematic configuration diagram showing a control system of the chemical heat storage device shown in FIG.
  • FIG. 3 is a cross-sectional view of the heat exchanger and reactor shown in FIG.
  • FIG. 4 is a flowchart showing details of a heating assist control processing procedure executed by the controller shown in FIG.
  • FIG. 5 is a flowchart showing details of the forced recovery control processing procedure executed by the controller shown in FIG.
  • FIG. 6 is a graph showing an example of an NH 3 saturated vapor pressure curve and NH 3 adsorption characteristics.
  • FIG. 1 is a schematic configuration diagram illustrating an exhaust purification system including an embodiment of a chemical heat storage device.
  • an exhaust purification system 1 is provided in an exhaust system of a diesel engine 2 (hereinafter simply referred to as “engine 2”) of a vehicle, and purifies harmful substances (environmental pollutants) contained in exhaust gas discharged from the engine 2. To do.
  • the exhaust purification system 1 includes a heat exchanger 3, a diesel oxidation catalyst (DOC) 4, a diesel exhaust particulate filter (DPF) 5, a selective reduction catalyst (SCR) 6, and ammonia.
  • a slip catalyst (ASC: Ammonia Slip Catalyst) 7 is provided.
  • the heat exchanger 3, DOC 4, DPF 5, SCR 6, and ASC 7 are located downstream of the exhaust gas flowing from the upstream side in the direction in which the exhaust gas flows (hereinafter simply upstream) in the middle of the exhaust passage 8 connected to the engine 2. It arranges in order toward the side (hereinafter, simply downstream).
  • the heat exchanger 3 includes a cylindrical outer tube 9 and a honeycomb-structured heat exchange unit 10 disposed in the outer tube 9.
  • the outer cylinder 9 has a function as an exhaust pipe that forms a part of the exhaust passage 8.
  • the outer cylinder 9 is made of, for example, stainless steel.
  • the heat exchange unit 10 forms an exhaust gas passage 10a through which exhaust gas flows, and performs heat exchange between the exhaust gas and a reaction material 17 (described later).
  • the heat exchanging portion 10 is made of ceramic such as SiSiC (non-oxide ceramic silicon carbide) having high thermal conductivity. Note that the material of the heat exchange unit 10 may be a metal such as stainless steel having high thermal conductivity.
  • the heat exchanger 3 constitutes a flow path forming part through which exhaust gas flows.
  • the DOC 4 oxidizes and purifies HC, CO, and the like contained in the exhaust gas.
  • the DPF 5 collects particulate matter (PM) contained in the exhaust gas and removes PM from the exhaust gas.
  • the SCR 6 reduces and purifies NOx contained in the exhaust gas with urea or ammonia (NH 3 ).
  • ASC7 oxidizes NH 3 passing through the SCR6.
  • the exhaust purification system 1 also includes a chemical heat storage device 11 that uses a reversible chemical reaction to heat (warm up) the exhaust gas to be heated via the heat exchanger 3 without external energy. .
  • the chemical heat storage device 11 stores the heat (exhaust heat) of the exhaust gas inside by separating the reaction material 17 (described later) and the reaction medium.
  • the chemical heat storage device 11 supplies the reaction medium to the reaction material 17 when necessary, and causes the reaction medium and the reaction material 17 to chemically react (chemical adsorption), thereby using the reaction heat during the chemical reaction.
  • ammonia NH 3
  • NH 3 ammonia
  • the chemical heat storage device 11 is configured so that NH 3 can flow between the ring-shaped reactor 12, the adsorber 14, and the reactor 12 and the adsorber 14. And an NH 3 supply pipe 13 for connecting the reactor 12 and the adsorber 14 to each other.
  • the NH 3 supply pipe 13 is provided with a valve 15 that opens and closes a flow path between the reactor 12 and the adsorber 14.
  • the reactor 12 heats the exhaust gas through the heat exchanger 3 in cooperation with the adsorber 14.
  • the reactor 12 is disposed around the outer cylinder 9 of the heat exchanger 3.
  • the reactor 12 includes a container 16 and a reaction material 17 accommodated in the container 16.
  • the reaction material 17 is configured to generate heat by chemical reaction with NH 3, and desorbs NH 3 by storing heat by receiving exhaust heat from the exhaust gas heated to high temperature.
  • the container 16 is made of a metal such as stainless steel.
  • the reaction material 17 is accommodated in the container 16 so as to contact the outer peripheral surface of the outer cylinder 9 of the heat exchanger 3.
  • MXa a halide represented by the composition formula MXa is used.
  • M is an alkaline earth metal such as Mg, Ca or Sr, or a transition metal such as Cr, Mn, Fe, Co, Ni, Cu or Zn.
  • X is Cl, Br, I or the like.
  • a is a number specified by the valence of M, and is 2 to 3.
  • the reaction material 17 may be in the form of powder or a press-molded body. Further, the reaction material 17 may be mixed with an additive for improving thermal conductivity. As the additive, carbon fiber, carbon bead, SiC bead, metal bead, polymer bead, polymer fiber or the like is used. Examples of the metal material of the metal beads include Cu, Ag, Ni, Ci—Cr, Al, Fe, and stainless steel.
  • a heat insulating material 18 is arranged in a ring shape between the container 16 and the reaction material 17.
  • glass wool or the like is used as the heat insulating material 18.
  • One end of the NH 3 supply pipe 13 is connected to the reaction material 17 through the container 16 and the heat insulating material 18.
  • a porous body (not shown) that forms a NH 3 flow path is interposed between the reaction material 17 and the heat insulating material 18.
  • the adsorber 14 includes an adsorbent 19 capable of leaving the holding and NH 3 by physical adsorption of NH 3.
  • adsorbent 19 capable of leaving the holding and NH 3 by physical adsorption of NH 3.
  • activated carbon, carbon black, mesoporous carbon, nanocarbon, zeolite, or the like is used as the adsorbent 19.
  • the adsorber 14 constitutes a reservoir for storing NH 3 by physically adsorbing NH 3 on the adsorbent 19.
  • the adsorbent of the adsorber 14 NH 3 desorbed from 19 is supplied to the reactor 12 through the NH 3 supply pipe 13.
  • the reaction material 17 for example, MgCl 2
  • the reaction material 17 chemically react to generate heat from the reaction material 17. That is, a reaction from the left side to the right side (exothermic reaction) in the following reaction formula (A) occurs.
  • heat generated from the reaction material 17 is transmitted to the heat exchanger 3.
  • the exhaust gas flowing through the heat exchanger 3 is heated as the heat exchanger 3 is heated.
  • the heated exhaust gas raises the DOC 4 to an activation temperature suitable for purification of pollutants.
  • the chemical heat storage device 11 includes an electric heater 20 disposed adjacent to the reactor 12 on the upstream side of the reactor 12.
  • the electric heater 20 is composed of, for example, a heating wire or other heating means.
  • the electric heater 20 is disposed around an exhaust pipe (not shown) that is connected to the outer cylinder 9 of the heat exchanger 3 and forms a part of the exhaust passage 8.
  • the electric heater 20 heats the exhaust gas upstream of the reactor 12.
  • the electric heater 20 is connected to a battery 22 via a heater switch 21.
  • the chemical heat storage device 11 includes temperature sensors 23 to 25, a pressure sensor 26, and a controller 27.
  • the temperature sensor 23 detects the temperature of the exhaust gas flowing through the portion of the exhaust passage 8 upstream of the electric heater 20.
  • the temperature sensor 24 detects the temperature of the exhaust gas flowing through the portion of the exhaust passage 8 downstream of the reactor 12.
  • the temperature sensors 23 and 24 constitute a temperature detection unit that detects the temperature of the heating target.
  • the temperature sensor 25 detects the temperature of the adsorber 14.
  • the pressure sensor 26 detects the pressure in the adsorber 14.
  • the controller 27 is connected to an engine ECU 29 that performs start / stop control of the engine 2, fuel injection control, and the like.
  • the engine ECU 29 is connected to an ignition switch (IG switch) 28 for switching between starting and stopping of the engine 2.
  • An output signal (ignition signal) of the IG switch 28 is sent to the engine ECU 29.
  • the controller 27 inputs detection values of the temperature sensors 23 to 25 and the pressure sensor 26, performs a predetermined process, outputs a command to the engine ECU 29, and controls the valve 15 and the heater switch 21.
  • the controller 27 has a heating assist control function for controlling heating of exhaust gas by chemical heat storage and a forced recovery control function for controlling NH 3 to be forcibly recovered by the adsorber 14. .
  • FIG. 4 is a flowchart showing details of the heating assist control processing procedure executed by the controller 27. At the start of execution of this process, the engine 2 is stopped, the valve 15 is closed, and the electric heater 20 is turned off.
  • the controller 27 first determines whether or not the engine 2 has been started by inputting an ignition ON signal of the IG switch 28 to the engine ECU 29 (step S101).
  • the controller 27 determines whether or not the exhaust gas temperature T1 detected by the temperature sensor 23 is equal to or higher than the warm-up start temperature (step S102).
  • the warm-up start temperature is a temperature at which the exhaust gas purification rate can be increased to a predetermined value (for example, 50%) or more by heating the exhaust gas by the chemical heat storage device 11, and is 150 ° C., for example.
  • the controller 27 controls the valve 15 to open (step S103).
  • the controller 27 determines whether or not the first predetermined time has elapsed since the control to open the valve 15 (step S104).
  • the first predetermined time is a time until the temperature of the exhaust gas reaches a temperature corresponding to the heat generation temperature of the reaction material 17 under normal traveling conditions, and is, for example, 100 seconds.
  • the controller 27 determines whether or not the temperature T2 of the exhaust gas detected by the temperature sensor 24 is equal to or higher than the heater operation reference temperature when the first predetermined time has elapsed since the control to open the valve 15 ( Procedure S105).
  • the heater operation reference temperature is a temperature corresponding to the heat generation temperature of the reaction material 17 and is, for example, 230 ° C.
  • the controller 27 controls the heater switch 21 to turn on the electric heater 20 (step S106), and executes step S105 again. Thereby, heating of the exhaust gas by chemical heat storage is assisted by the electric heater 20.
  • the controller 27 determines whether or not the second predetermined time has elapsed since the valve 15 was controlled to open (step S107).
  • the second predetermined time is a time required for heating the exhaust gas by the heat generated in the reactor 12, and is, for example, 400 seconds. That is, the second predetermined time is longer than the first predetermined time.
  • the controller 27 executes the step S105 again, and the second predetermined time has elapsed after controlling to open the valve 15. If so, the heater switch 21 is controlled to turn off the electric heater 20 (step S108).
  • step S102 the exhaust gas temperature T1 detected by the temperature sensor 23 is compared with the warm-up start temperature.
  • the exhaust gas temperature T2 detected by the temperature sensor 24 is warmed up. You may compare with temperature. In this case, the warm-up start temperature is set lower than the above numerical value.
  • the controller 27 includes a first heater control unit that controls ON / OFF of the electric heater 20 and a valve control unit that controls opening and closing of the valve 15 when the reaction material 17 generates heat.
  • the above steps S104 to S108 function as a first heater control unit.
  • the procedures S102 and 103 function as a valve control unit.
  • FIG. 5 is a flowchart showing details of the forced recovery control processing procedure executed by the controller 27. At the start of execution of this process, the engine 2 is operating, the valve 15 is open, and the electric heater 20 is OFF.
  • the controller 27 first determines whether or not the ignition OFF signal of the IG switch 28 is input from the engine ECU 29 (step S111). When the ignition OFF signal is input, the NH 3 adsorption amount of the adsorber 14 is determined. Is estimated (step S112).
  • the NH 3 adsorption amount is estimated using the NH 3 saturated vapor pressure curve shown in FIG. 6A and the NH 3 adsorption characteristic shown in FIG.
  • the NH 3 saturated vapor pressure curve shown in FIG. 6A is a graph showing the relationship between the temperature of the adsorber 14 and the NH 3 saturated vapor pressure. As the temperature of the adsorber 14 increases, the NH 3 saturated vapor pressure increases in a curve.
  • the NH 3 adsorption characteristic shown in FIG. 6B is a graph showing the relationship between the relative pressure and the NH 3 adsorption amount of the adsorber 14. As the relative pressure increases, the NH 3 adsorption amount of the adsorber 14 increases in a curve.
  • the relative pressure is a ratio (P / Psat) between the NH 3 saturated vapor pressure Psat and the pressure P in the adsorber 14.
  • the controller 27 first NH 3 from the saturated vapor pressure curve, determine the NH 3 saturated vapor pressure Psat corresponding to the temperature T of the adsorbent 14 which is detected by the temperature sensor 25. Then, the controller 27 calculates a relative pressure that is a ratio between the NH 3 saturated vapor pressure Psat and the pressure P in the adsorber 14 detected by the pressure sensor 26. Then, the controller 27 obtains the NH 3 adsorption amount Anh3 corresponding to the relative pressure from the NH 3 adsorption characteristics.
  • the controller 27 determines whether the NH 3 adsorption amount of the adsorber 14 is a predetermined amount or more (step S113).
  • the predetermined amount is a minimum amount necessary for carrying out the exothermic reaction, and is, for example, 100 g.
  • the controller 27 controls the heater switch 21 to turn on the electric heater 20 when the NH 3 adsorption amount of the adsorber 14 is smaller than a predetermined amount (step S114). Thereby, the exhaust gas is heated by the electric heater 20.
  • the controller 27 determines whether or not the exhaust gas temperature T2 detected by the temperature sensor 24 is equal to or higher than the recovery temperature (procedure S115), and when the exhaust gas temperature T2 is equal to or higher than the recovery temperature, the procedure is again performed. S112 is executed.
  • the recovery temperature is a temperature at which NH 3 can be recovered in the adsorber 14 by the heat of the exhaust gas, and is 300 ° C., for example.
  • the controller 27 controls the heater switch 21 to turn off the electric heater 20 when the NH 3 adsorption amount of the adsorber 14 is equal to or larger than a predetermined amount (step S116). Then, the controller 27 performs control so as to close the valve 15 (procedure S117), and further outputs a command to the engine ECU 29 so as to stop the engine 2 (procedure S118).
  • the controller 27 estimates the amount of the reaction medium in the adsorber 14 and the second heater control that controls ON / OFF of the electric heater 20 when the reaction medium is desorbed from the reaction material 17. And a valve control unit that controls opening and closing of the valve 15.
  • the procedure S112 functions as an estimation unit.
  • the above steps S113 to S116 function as a second heater control unit.
  • the procedure S117 functions as a valve control unit.
  • the electric heater 20 for heating the exhaust gas is disposed adjacent to the reactor 12. Therefore, when heating of the exhaust gas is insufficient only by heating the exhaust gas through the heat exchanger 3 by the heat generated by the chemical reaction between the reactant 17 of the reactor 12 and NH 3 , the electric heater 20 can assist in heating the exhaust gas. Thereby, exhaust gas can be heated to desired temperature and it can prevent that heating of exhaust gas becomes inadequate. As a result, it is possible to construct the exhaust purification system 1 having a high purification rate.
  • the electric heater 20 when the exhaust gas temperature T2 detected by the temperature sensor 24 is lower than the heater operation reference temperature, the electric heater 20 is automatically turned on, and the electric heater 20 assists in heating the exhaust gas. As a result, the exhaust gas can be easily and reliably heated to a desired temperature.
  • the controller 27 determines whether or not the exhaust gas temperature T2 is higher than the heater operation reference temperature. Thus, since the controller 27 determines whether or not to turn on the electric heater 20, it is not necessary to turn the electric heater 20 on unnecessarily, and power consumption can be reduced.
  • the electric heater 20 is automatically turned off, so that it is not necessary to turn the electric heater 20 on unnecessarily. Can be further reduced.
  • the electric heater 20 is disposed upstream of the reactor 12, when the recovery of NH 3 to the adsorber 14 due to the heat of the exhaust gas is insufficient, the electric heater 20 is operated to Heat of the exhaust gas heated by the heater 20 can be applied to the reaction material 17. Thereby, the regeneration reaction in which NH 3 is desorbed from the reaction material 17 can be promoted, and the recovery of NH 3 to the adsorber 14 can be prevented from becoming insufficient.
  • the electric heater 20 is automatically turned ON, the exhaust gas is heated by the electric heater 20 Is done. Thereby, reproduction
  • the electric heater 20 is automatically turned off, so that the electric heater 20 does not need to be turned on unnecessarily, and power consumption is reduced. Can do.
  • the present invention is not limited to the above embodiment.
  • the electric heater 20 is disposed adjacent to the reactor 12 on the upstream side of the reactor 12, but the arrangement location of the electric heater 20 is not particularly limited thereto. You may arrange
  • the reaction medium is not particularly limited to NH 3 , for example, CO 2.
  • H 2 O or the like may be used.
  • the reactant 17 that chemically reacts with CO 2 includes MgO, CaO, BaO, Ca (OH) 2 , Mg (OH) 2 , Fe (OH) 2 , and Fe (OH). 3 , FeO, Fe 2 O 3 or Fe 3 O 4 can be used.
  • H 2 O is used as the reaction medium
  • CaO, MnO, CuO, Al 2 O 3 or the like can be used as the reaction material 17 that chemically reacts with H 2 O.
  • the reactor 12 is arrange
  • this invention has multiple reactors and heat exchangers which have a reaction material inside an exhaust pipe.
  • the present invention is also applicable to chemical heat storage devices that are alternately stacked one by one.
  • the electric heater may be disposed adjacent to all the reactors, or the electric heater may be disposed adjacent to only an arbitrary reactor.
  • the said embodiment is the chemical thermal storage apparatus 11 which heats exhaust gas via the heat exchanger 3
  • this invention is applicable also to the chemical thermal storage apparatus which heats exhaust gas via an exhaust pipe.
  • the present invention is also applicable to a chemical heat storage device that heats exhaust gas discharged from a gasoline engine.
  • the present invention can be applied to a chemical heat storage device that heats oil, for example, in addition to exhaust gas.
  • the present invention is not limited to a chemical heat storage device that heats a fluid such as exhaust gas, and can also be applied to a chemical heat storage device that heats a catalyst such as DOC4. In this case, the catalyst is heated by the electric heater 20.
  • the present invention can be applied to an apparatus other than the engine exhaust system, for example, heating pipes provided in an oil circulation system.
  • the present invention may heat various heat media in vehicles such as engine oil, transmission oil, cooling water, or air.
  • the reactor of the chemical heat storage device may be disposed on the outer periphery (a part of the outer periphery or the entire periphery of the outer periphery) of the heat medium channel through which the heat medium flows to heat the heat medium channel itself.
  • the electric heater is disposed inside the heat medium flow channel or on the outer periphery of the heat medium flow channel on the upstream side or the downstream side of the portion of the heat medium flow channel where the reactor is provided.
  • a heat exchanger may be disposed in the heat medium flow path through which the heat medium flows, and the heat medium may be heated via the heat exchanger in a reactor disposed on the outer periphery of the heat medium flow path.
  • the electric heater is disposed inside the heat medium flow channel or on the outer periphery of the heat medium flow channel on the upstream side or the downstream side of the portion of the heat medium flow channel where the reactor is provided.
  • a heat exchange unit integrated reactor is configured in which a plurality of reaction units including heat storage materials and heat exchange units such as heat exchange fins are alternately stacked, and the heat exchange unit integrated reactor is heated. You may arrange
  • the electric heater is disposed inside the heat medium flow channel or on the outer periphery of the heat medium flow channel on the upstream side or the downstream side of the portion of the heat medium flow channel where the reactor is provided.
  • the present invention is also applicable to a chemical heat storage device arranged other than the engine.
  • 11 chemical heat storage device, 12 ... reactor, 13 ... NH 3 supply pipe, 14 ... adsorber (reservoir), 15 ... valve, 17 ... reaction member, 20 ... electric heater, 23, 24 ... temperature sensor (temperature detection Part), 27... Controller (first heater control unit, valve control unit, estimation unit, second heater control unit).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
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  • Combustion & Propulsion (AREA)
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Abstract

La présente invention concerne un appareil d'accumulation de chaleur chimique au moyen duquel peut être empêché un chauffage insuffisant d'un objet destiné à être chauffé. Cet appareil (11) d'accumulation de chaleur chimique est pourvu : d'un réservoir (14) permettant de stocker un milieu de réaction; d'un réacteur (12) qui comporte un réactif (17) permettant d'émettre de la chaleur par le biais d'une réaction chimique avec le milieu de réaction, et de désorber le milieu de réaction par accumulation de chaleur, et qui, en coopération avec le réservoir (14), chauffe un objet destiné à être chauffé; d'un tube d'alimentation (13) raccordé au réservoir (14) et au réacteur (12) de sorte qu'un écoulement du milieu de réaction soit possible entre le réservoir (14) et le réacteur (12); et d'un dispositif de chauffage électrique (20) agencé à proximité du réacteur, permettant de chauffer un objet destiné à être chauffé.
PCT/JP2015/078104 2014-10-09 2015-10-02 Appareil d'accumulation de chaleur chimique WO2016056488A1 (fr)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
JP2017025728A (ja) * 2015-07-17 2017-02-02 株式会社豊田中央研究所 排気浄化装置

Citations (2)

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Publication number Priority date Publication date Assignee Title
JPH11130405A (ja) * 1997-10-28 1999-05-18 Ngk Insulators Ltd 改質反応装置、触媒装置、それらに用いる発熱・触媒体、及び改質反応装置の運転方法
JP2014085093A (ja) * 2012-10-26 2014-05-12 Toyota Industries Corp 蓄熱装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11130405A (ja) * 1997-10-28 1999-05-18 Ngk Insulators Ltd 改質反応装置、触媒装置、それらに用いる発熱・触媒体、及び改質反応装置の運転方法
JP2014085093A (ja) * 2012-10-26 2014-05-12 Toyota Industries Corp 蓄熱装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017025728A (ja) * 2015-07-17 2017-02-02 株式会社豊田中央研究所 排気浄化装置

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