WO2020156994A1 - Use of plate heat exchangers in combination with exothermal reactors - Google Patents

Use of plate heat exchangers in combination with exothermal reactors Download PDF

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Publication number
WO2020156994A1
WO2020156994A1 PCT/EP2020/051905 EP2020051905W WO2020156994A1 WO 2020156994 A1 WO2020156994 A1 WO 2020156994A1 EP 2020051905 W EP2020051905 W EP 2020051905W WO 2020156994 A1 WO2020156994 A1 WO 2020156994A1
Authority
WO
WIPO (PCT)
Prior art keywords
reactors
exothermal
plate heat
reaction
combination
Prior art date
Application number
PCT/EP2020/051905
Other languages
French (fr)
Inventor
Emil Andreas TJÄRNEHOV
Original Assignee
Haldor Topsøe A/S
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 Haldor Topsøe A/S filed Critical Haldor Topsøe A/S
Priority to AU2020214700A priority Critical patent/AU2020214700A1/en
Priority to CN202080007296.3A priority patent/CN113226536A/en
Publication of WO2020156994A1 publication Critical patent/WO2020156994A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0006—Controlling or regulating processes
    • B01J19/0013—Controlling the temperature of the process
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0006—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the plate-like or laminated conduits being enclosed within a pressure vessel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00168—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles
    • B01J2208/00176—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles outside the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00168—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles
    • B01J2208/00212—Plates; Jackets; Cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00168—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles
    • B01J2208/00256—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles in a heat exchanger for the heat exchange medium separate from the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00051—Controlling the temperature
    • B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
    • B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
    • B01J2219/00096—Plates
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0022—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for chemical 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0075—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for syngas or cracked gas cooling systems

Definitions

  • the present invention relates to the use of a plate heat exchanger as feed/effluent heat exchanger in multiple reactor systems.
  • Plate heat exchangers are generally formed by an elongate impervious chamber and a bundle of plates arranged in the chamber and providing therewith a free space.
  • the plate bundle consists of a stack of mutually parallel plates that provide between them a double circuit for the flow of two independent and generally counter-current fluids.
  • a plate heat exchanger is a compact, cost efficient heat exchanger solution which is used whenever the process conditions can allow it. High pressure, above 10-20 bar, and a heavy fouling feed stream represent typical
  • feed/effluent exchangers E are used as shown in the appended figure.
  • the principle is that cold feed gas (1) is heated by the outlet gas (2) from the reactor (s) R.
  • the absolute pressure in such a feed/effluent exchanger can be high, i.e. up to several hundred bars, but the pressure difference is limited to the pressure drop in the reactor system, which can be kept below 20 bar, preferably below 10 bar. This allows for use of a plate heat exchanger as feed/effluent exchanger, provided that it is installed in a pressure shell that can withstand the high absolute pressure.
  • US 9.120.068 describes a chemical isothermal reactor with an internal plate heat exchanger having heat exchange radial plates and radial ducts parallel to sides of the plates for distributing and collecting a heat exchange fluid. A part of the radial ducts has a smaller cross section near the inner converging ends .
  • WO 2007/096699 describes a multiple reactor chemical production system, where multiple reactors in a common pressure shell one by one are connected to multiple plate type feed/effluent exchangers in a common pressure shell.
  • reaction conditions are adjustable to the respective local
  • composition of the reaction mixture and variable over the reactor length A comparison of one standard shell-and-tube type heat exchanger with a plate heat exchanger in a pressure shell results in an advantage for the shell-and-tube type.
  • the present invention relates to a process for performing one or more exothermal reactions, wherein a plate heat exchanger is used as feed/effluent exchanger in connection with two or more reactors, which are operating in parallel performing exothermal reaction (s) at a pressure above 30 bar abs .
  • the reactors are preferably boiling water reactors, quench type reactors, adiabatic reactors or any combination of these reactors working in series.
  • the primary reaction in the reactors is preferably a conversion of synthesis gas to methanol or ammonia or dimethyl ether (DME) or any other exothermal reaction.
  • DME dimethyl ether
  • this invention provides a process of

Abstract

In a process for performing one or more exothermal reactions, a plate heat exchanger is used as feed/effluent exchanger in connection with two or more reactors, which are operating in parallel. The reactors perform the exothermal reaction (s) at a pressure above 30 bar abs.

Description

Title: Use of plate heat exchangers in combination with exothermal reactors
The present invention relates to the use of a plate heat exchanger as feed/effluent heat exchanger in multiple reactor systems.
Plate heat exchangers are generally formed by an elongate impervious chamber and a bundle of plates arranged in the chamber and providing therewith a free space. The plate bundle consists of a stack of mutually parallel plates that provide between them a double circuit for the flow of two independent and generally counter-current fluids. A plate heat exchanger is a compact, cost efficient heat exchanger solution which is used whenever the process conditions can allow it. High pressure, above 10-20 bar, and a heavy fouling feed stream represent typical
limitations for the use of plate heat exchangers in the industry.
Many exothermal reaction systems include use of one or more feed/effluent exchangers E as shown in the appended figure. The principle is that cold feed gas (1) is heated by the outlet gas (2) from the reactor (s) R. The absolute pressure in such a feed/effluent exchanger can be high, i.e. up to several hundred bars, but the pressure difference is limited to the pressure drop in the reactor system, which can be kept below 20 bar, preferably below 10 bar. This allows for use of a plate heat exchanger as feed/effluent exchanger, provided that it is installed in a pressure shell that can withstand the high absolute pressure.
Regarding prior art, US 9.120.068 describes a chemical isothermal reactor with an internal plate heat exchanger having heat exchange radial plates and radial ducts parallel to sides of the plates for distributing and collecting a heat exchange fluid. A part of the radial ducts has a smaller cross section near the inner converging ends .
WO 2007/096699 describes a multiple reactor chemical production system, where multiple reactors in a common pressure shell one by one are connected to multiple plate type feed/effluent exchangers in a common pressure shell.
In EP 3 401 299 A1 , a reactor for conducting exothermic equilibrium reactions, especially for methanol synthesis by heterogeneously catalyzed conversion of synthesis gas, is described. The reactor enables re-adjustment and hence optimization of the reaction conditions along the
longitudinal coordinate of the reactor. It is divided into a multitude of series-connected reaction cells, each of which comprising a pre-heating zone, a cooled reaction zone, one or more cooling zones and a deposition zone for condensable reaction products. This way, the reaction conditions are adjustable to the respective local
composition of the reaction mixture and variable over the reactor length. A comparison of one standard shell-and-tube type heat exchanger with a plate heat exchanger in a pressure shell results in an advantage for the shell-and-tube type. For large capacity reactor systems, where two or more reactors operating in parallel are connected to two or more
feed/effluent exchangers of shell-and-tube type, it has however been found that these exchangers can be replaced by a single plate heat exchanger in a pressure shell, which results in a considerable cost saving.
Thus, the present invention relates to a process for performing one or more exothermal reactions, wherein a plate heat exchanger is used as feed/effluent exchanger in connection with two or more reactors, which are operating in parallel performing exothermal reaction (s) at a pressure above 30 bar abs .
The reactors are preferably boiling water reactors, quench type reactors, adiabatic reactors or any combination of these reactors working in series.
In the process according to the invention, the primary reaction in the reactors is preferably a conversion of synthesis gas to methanol or ammonia or dimethyl ether (DME) or any other exothermal reaction.
In one aspect, this invention provides a process of
(a) using a plate heat exchanger as feed/effluent
exchanger in connection with two or more reactors operating in parallel and performing one or more exothermal reaction (s) at a pressure above 30 bar abs, (b) wherein the reactors in (a) are boiling water reactors or quench type reactors or adiabatic reactors or any combination of these working in series, (c) and wherein the primary reaction in the reactors
(a) and (b) is a conversion of synthesis gas to methanol or ammonia or dimethyl ether (DME) or any other exothermal reaction. The invention is described in more detail in the example which follows.
Example
For a large scale methanol plant producing 5000 MT methanol per day, requiring 3 boiling water reactors in parallel, the standard use of 3 shell-and-tube feed/effluent heat exchangers has been compared with the use of only one plate heat exchanger installed in a pressure shell. The cost reduction by doing so was more than 25%.

Claims

Claims :
1. A process for performing one or more exothermal reactions, wherein a plate heat exchanger is used as feed/effluent exchanger in connection with two or more reactors, which are operating in parallel performing the exothermal reaction (s) at a pressure above 30 bar abs .
2. Process according to claim 1, wherein the
reactors are boiling water reactors, quench type reactors, adiabatic reactors or any combination of these reactors working in series.
3. Process according to claim 1 or 2, wherein the primary reaction in the reactors is a conversion of synthesis gas to methanol or ammonia or dimethyl ether (DME) or any other exothermal reaction.
PCT/EP2020/051905 2019-02-01 2020-01-27 Use of plate heat exchangers in combination with exothermal reactors WO2020156994A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2020214700A AU2020214700A1 (en) 2019-02-01 2020-01-27 Use of plate heat exchangers in combination with exothermal reactors
CN202080007296.3A CN113226536A (en) 2019-02-01 2020-01-27 Combined use of plate heat exchanger and exothermic reactor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201900151 2019-02-01
DKPA201900151 2019-02-01

Publications (1)

Publication Number Publication Date
WO2020156994A1 true WO2020156994A1 (en) 2020-08-06

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Application Number Title Priority Date Filing Date
PCT/EP2020/051905 WO2020156994A1 (en) 2019-02-01 2020-01-27 Use of plate heat exchangers in combination with exothermal reactors

Country Status (4)

Country Link
CN (1) CN113226536A (en)
AR (1) AR117912A1 (en)
AU (1) AU2020214700A1 (en)
WO (1) WO2020156994A1 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6180846B1 (en) * 1998-09-08 2001-01-30 Uop Llc Process and apparatus using plate arrangement for combustive reactant heating
WO2007096699A2 (en) 2005-09-23 2007-08-30 Heatric Multiple reactor chemical production system
EP1995545A2 (en) * 2007-05-23 2008-11-26 Mingatec GmbH Plate heater for heat transfer processes
DE102009033661A1 (en) * 2009-07-17 2011-01-20 Bayer Technology Services Gmbh Heat exchanger module and heat exchanger in a compact design
US9120068B2 (en) 2008-02-18 2015-09-01 Casale Sa Isothermal chemical reactor with plate heat exchanger
US20150267128A1 (en) * 2014-03-18 2015-09-24 Quanta Associates, L.P. Treatment of Heavy Crude Oil and Diluent
CN105399604A (en) * 2015-10-12 2016-03-16 上海国际化建工程咨询公司 Energy-efficient super-large scale methanol-synthesizing method with production of steam of different grades and apparatus thereof
WO2017167642A1 (en) * 2016-03-30 2017-10-05 Haldor Topsøe A/S A methanol synthesis process layout for large production capacity
EP3401299A1 (en) 2017-05-12 2018-11-14 L'air Liquide, Société Anonyme Pour L'Étude Et L'exploitation Des Procédés Georges Claude Reactor for carrying out exothermic equilibrium reactions

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1310475A1 (en) * 2001-11-11 2003-05-14 Methanol Casale S.A. Process and plant for the heterogeneous synthesis of chemical compounds
DE10344283A1 (en) * 2003-09-24 2005-04-21 Basf Ag Process for controlling the reactor inlet temperature during methylamine production
CN101514134B (en) * 2008-02-23 2012-08-22 中国石化集团洛阳石油化工工程公司 Method for adjusting feed temperature in reaction of transforming compound containing oxygen into olefin
WO2017025272A1 (en) * 2015-08-12 2017-02-16 Haldor Topsøe A/S A novel process for methanol production from low quality synthesis gas
GB201600794D0 (en) * 2016-01-15 2016-03-02 Johnson Matthey Davy Technologies Ltd Methanol process

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6180846B1 (en) * 1998-09-08 2001-01-30 Uop Llc Process and apparatus using plate arrangement for combustive reactant heating
WO2007096699A2 (en) 2005-09-23 2007-08-30 Heatric Multiple reactor chemical production system
EP1995545A2 (en) * 2007-05-23 2008-11-26 Mingatec GmbH Plate heater for heat transfer processes
US9120068B2 (en) 2008-02-18 2015-09-01 Casale Sa Isothermal chemical reactor with plate heat exchanger
DE102009033661A1 (en) * 2009-07-17 2011-01-20 Bayer Technology Services Gmbh Heat exchanger module and heat exchanger in a compact design
US20150267128A1 (en) * 2014-03-18 2015-09-24 Quanta Associates, L.P. Treatment of Heavy Crude Oil and Diluent
CN105399604A (en) * 2015-10-12 2016-03-16 上海国际化建工程咨询公司 Energy-efficient super-large scale methanol-synthesizing method with production of steam of different grades and apparatus thereof
WO2017167642A1 (en) * 2016-03-30 2017-10-05 Haldor Topsøe A/S A methanol synthesis process layout for large production capacity
EP3401299A1 (en) 2017-05-12 2018-11-14 L'air Liquide, Société Anonyme Pour L'Étude Et L'exploitation Des Procédés Georges Claude Reactor for carrying out exothermic equilibrium reactions

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Publication number Publication date
AR117912A1 (en) 2021-09-01
AU2020214700A1 (en) 2021-06-10
CN113226536A (en) 2021-08-06

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