WO1992005395A1 - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
- Publication number
- WO1992005395A1 WO1992005395A1 PCT/EP1991/001826 EP9101826W WO9205395A1 WO 1992005395 A1 WO1992005395 A1 WO 1992005395A1 EP 9101826 W EP9101826 W EP 9101826W WO 9205395 A1 WO9205395 A1 WO 9205395A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat exchanger
- cavities
- side walls
- walls
- exchanger according
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/006—Constructions of heat-exchange apparatus characterised by the selection of particular materials of glass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
Definitions
- the invention relates to a heat exchanger for cooling hot raw gas with aggressive constituents and for heating the raw gas purified to clean gas, the housing of which is formed by two side walls and an upper and lower tube sheet, with the side walls being assigned internal partition walls to form cavities and the ends of a plurality of exchanger tubes arranged parallel to one another and to the side walls are inserted in the upper and lower tube sheets and the hot raw gas flows through the exchanger tubes and the clean gas flows through the housing transversely to the exchanger tubes.
- the housing and the partition walls are preferably made of highly corrosion-resistant metal sheets and the exchanger tubes are preferably made of glass.
- Such heat exchangers are used in particular in exhaust gas cleaning systems.
- a glass tube heat exchanger of the aforementioned type is known, in which flow channels are formed on the side walls, through which hot flue gas flows to heat these walls and thus to avoid corrosive condensation.
- the intended purpose is not achieved with certainty with the known glass tube heat exchanger, since the hot flue gas in the flow channels often cools to such an extent that the acid points are undershot and, as a result, corrosion due to the aggressive constituents of the flue gas becomes effective.
- the invention has for its object to provide a heat exchanger in which the side walls can be better protected against corrosive condensation with little equipment.
- this is achieved in that the cavities formed between the side walls and the partition walls are subjected to negative pressure and that harmful gases of the clean gas diffused into the cavities through the partition walls are fed to the clean gas stream through a line, or in that the between the Side and the partitions formed cavities are pressurized.
- this measure which has hitherto been continuous, for protecting the side walls, namely heating them, is left.
- corrosion of the side walls is prevented by any harmful gases of the clean gas which have possibly penetrated into the intermediate space or cavity between the partition and the side wall being removed from the cavity immediately after their penetration due to the negative pressure and being fed to the clean gas stream.
- the time in which the harmful gas remains within the cavity or intermediate space is not sufficient for the condensation of the harmful gas and thus for any damage to the side wall.
- the cavity or space between the side and the partition is kept under positive pressure. In this way, the penetration of harmful gases into this cavity is avoided at all.
- the side walls are accordingly reliably protected against corrosion due to the condensation of harmful gases originating from the clean gas stream.
- the negative pressure in the cavities is generated by the suction of the clean gas flow generated at a connection of the line, the removal of harmful gases which have penetrated into the cavity or intermediate space can be carried out in a particularly simple manner in terms of apparatus, the negative pressure being caused solely by the suction pressure that can be generated due to the flow of the clean gas stream is applied.
- a pump can be arranged in the line connecting the cavities to the clean gas flow, as a result of which the pressure gradient can be increased. As a result of this increase in the pressure gradient, the dwell time of any harmful gases that have penetrated into the cavity can be reduced further within the cavity.
- REPLACEMENT LEAF the occurrence of damage to the partition wall can be reliably determined since any pressure drop within the cavity can be detected directly. An interruption in the operation of the heat exchanger is not necessary even if the partition is damaged, since the supply of fresh air or an inert gas into the cavity maintains the excess pressure inside the cavity and the penetration of harmful gases can be reliably prevented. The partition can then be repaired at the next scheduled shutdown.
- any defects in the partition wall can be detected visually, which means that the repair time, which is conventionally largely for the Finding any damaged areas is consumed, can be significantly reduced.
- the cavities can advantageously be subdivided into at least two sections, the overpressure or underpressure present in them being monitored by means of appropriate pressure measuring devices, as a result of which quick and easy localization of damage that has occurred is possible, in particular in the case of comparatively large designs.
- adsorbent bed in the cavities be it in the form of a flour or granules.
- Limestone, activated carbon or the like is preferably used as the adsorbent.
- the flue gas hits the bed of adsorbent first and prevents direct contact with the side walls, since the adsorbent used is not only resistant to the pollutants in the flue gas, but also adsorbs and neutralizes it. If a leak has occurred, it can easily be determined via the connecting piece provided in the walls in the upper regions of the cavities, which are used for venting or indicating leakage. Any condensate that may occur can be drawn off via drainage connections which are present in the lower regions of the cavities.
- the partitions and / or the side walls are advantageously designed to be completely or partially exchangeable and attached. arranges so that if a leak occurs, it can be exchanged in whole or in sections, and the operation of the heat exchanger can be continued.
- spacer rods can be arranged in these spacer bars, which can be welded to the corresponding walls in an interrupted manner.
- FIG 1 is a side view of an Xtfärmeleyers
- Figure 2 is a plan view of Figure 1
- Figure 3 is an illustration of parts of the heat exchanger essential to the invention.
- the housing 1 of the heat exchanger is formed by the two side walls 2, 3, which simultaneously represent the outer walls, and an upper and lower tube sheet 4, 5.
- the side walls 2, 3 are assigned inside to form cavities 6, 7 partitions 8, 9.
- the ends of a multiplicity of exchanger tubes 10 arranged parallel to one another and to the side walls 2, 3 are inserted in the upper and lower tube bases 4, 5.
- the hot raw gas flows through the exchanger tubes 10, while the cleaned clean gas flows through the housing 1 of the heat exchanger transversely to the exchanger tubes 10.
- the side walls 2, 3 and the partition walls 8, 9 and the upper and lower tube sheets 4, 5 are preferably made of highly corrosion-resistant sheets, while the exchanger tubes 10 are preferably made of glass. However, it is also possible to manufacture them from graphite or plastic, for example.
- each cavity - in the illustration according to FIG. 3 the cavity 6 - is connected via a line 11 to an external pressure source.
- a negative or positive pressure can be generated within the cavity 6 by means of the external pressure source.
- the harmful gas which enters the cavity 6 is removed so quickly that it does not condense within the cavity 6. This makes the side wall 2 reliable
- REPLACEMENT LEAF protects against corrosion g f .
- Spacer rods 13 are arranged within the cavity 6 and are welded on to the partition 8 or the side wall 2 in an interrupted manner.
- the hollow space 6 can be kept stable by means of these spacer bars.
- the line 11 can be connected to a connection 12; the connection 12 is in turn connected to the clean gas flow in such a way that the suction pressure occurring as a result of the pure gas flow can be used for generating negative pressure within the cavity 6 and serves as a negative pressure source.
- a vacuum pump can also be arranged in line 11, by means of which the generation of vacuum within cavity 6 is supported or accomplished.
- the line 11 can in addition to the overpressure source Contain pressure gauges, by means of which the excess pressure within the cavity 6 can be monitored.
- the invention is not limited to the embodiment shown and described.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Power Steering Mechanism (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP91916799A EP0502158B1 (en) | 1990-09-25 | 1991-09-25 | Heat exchanger |
DE59103907T DE59103907D1 (en) | 1990-09-25 | 1991-09-25 | HEAT EXCHANGER. |
CS921526A CS152692A3 (en) | 1990-09-25 | 1992-05-21 | Heat exchanger |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4030250.4 | 1990-09-25 | ||
DE4030250A DE4030250A1 (en) | 1990-09-25 | 1990-09-25 | HEAT EXCHANGER |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992005395A1 true WO1992005395A1 (en) | 1992-04-02 |
Family
ID=6414902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1991/001826 WO1992005395A1 (en) | 1990-09-25 | 1991-09-25 | Heat exchanger |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0502158B1 (en) |
AT (1) | ATE115715T1 (en) |
CS (1) | CS152692A3 (en) |
DE (2) | DE4030250A1 (en) |
HU (1) | HUT61399A (en) |
PL (1) | PL294836A1 (en) |
WO (1) | WO1992005395A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016114466A1 (en) * | 2016-08-04 | 2018-02-08 | Eisenmann Se | Conditioning device and method for conditioning a gaseous medium and system and method for treating workpieces |
CN110686462B (en) * | 2019-10-08 | 2021-07-20 | 太仓陶氏电气有限公司 | Adaptive ducted radiator and working method thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1398783A (en) * | 1964-01-24 | 1965-05-14 | Equip Thermiques Et De Recuper | Process and devices for protecting the exchange surfaces of a heat exchanger and exchangers protected by this process |
DE3534822A1 (en) * | 1985-09-30 | 1987-04-16 | Langbein & Engelbrecht | Glass tube heat exchanger |
US4840226A (en) * | 1987-08-10 | 1989-06-20 | The United States Of America As Represented By The United States Department Of Energy | Corrosive resistant heat exchanger |
DE3909929C1 (en) * | 1989-03-25 | 1990-05-31 | Langbein & Engelbracht Gmbh & Co Kg, 4630 Bochum, De | Glass tube heat exchanger |
WO1990009555A1 (en) * | 1989-02-20 | 1990-08-23 | Dieter Wallstein | Heat exchanger |
-
1990
- 1990-09-25 DE DE4030250A patent/DE4030250A1/en not_active Withdrawn
-
1991
- 1991-09-25 PL PL29483691A patent/PL294836A1/en unknown
- 1991-09-25 DE DE59103907T patent/DE59103907D1/en not_active Expired - Fee Related
- 1991-09-25 WO PCT/EP1991/001826 patent/WO1992005395A1/en not_active Application Discontinuation
- 1991-09-25 EP EP91916799A patent/EP0502158B1/en not_active Expired - Lifetime
- 1991-09-25 HU HU921740A patent/HUT61399A/en unknown
- 1991-09-25 AT AT91916799T patent/ATE115715T1/en not_active IP Right Cessation
-
1992
- 1992-05-21 CS CS921526A patent/CS152692A3/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1398783A (en) * | 1964-01-24 | 1965-05-14 | Equip Thermiques Et De Recuper | Process and devices for protecting the exchange surfaces of a heat exchanger and exchangers protected by this process |
DE3534822A1 (en) * | 1985-09-30 | 1987-04-16 | Langbein & Engelbrecht | Glass tube heat exchanger |
US4840226A (en) * | 1987-08-10 | 1989-06-20 | The United States Of America As Represented By The United States Department Of Energy | Corrosive resistant heat exchanger |
WO1990009555A1 (en) * | 1989-02-20 | 1990-08-23 | Dieter Wallstein | Heat exchanger |
DE3909929C1 (en) * | 1989-03-25 | 1990-05-31 | Langbein & Engelbracht Gmbh & Co Kg, 4630 Bochum, De | Glass tube heat exchanger |
Also Published As
Publication number | Publication date |
---|---|
ATE115715T1 (en) | 1994-12-15 |
DE4030250A1 (en) | 1992-03-26 |
CS152692A3 (en) | 1992-12-16 |
HU9201740D0 (en) | 1992-08-28 |
EP0502158B1 (en) | 1994-12-14 |
HUT61399A (en) | 1992-12-28 |
PL294836A1 (en) | 1992-11-16 |
EP0502158A1 (en) | 1992-09-09 |
DE59103907D1 (en) | 1995-01-26 |
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