CN104204712A - Rotation heat exchanger having heat exchanger plates or heat exchanger tubes made of carbon and graphite materials - Google Patents
Rotation heat exchanger having heat exchanger plates or heat exchanger tubes made of carbon and graphite materials Download PDFInfo
- Publication number
- CN104204712A CN104204712A CN201380012114.1A CN201380012114A CN104204712A CN 104204712 A CN104204712 A CN 104204712A CN 201380012114 A CN201380012114 A CN 201380012114A CN 104204712 A CN104204712 A CN 104204712A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- plate
- rotary
- gas
- rotary heat
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- 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
- F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
- F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
- F28D19/041—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier with axial flow through the intermediate heat-transfer medium
- F28D19/042—Rotors; Assemblies of heat absorbing masses
-
- 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
- F28F21/02—Constructions of heat-exchange apparatus characterised by the selection of particular materials of carbon, e.g. graphite
Abstract
A rotation heat exchanger is described for the recovery of heat with a storage mass. The rotation heat exchanger consists of heat exchanger plates or heat exchanger tubes arranged as a rotor (1) which accepts the heat from a hot gas flow and releases the heat to a colder gas flow, wherein the heat exchanger plates or heat exchanger tubes may consist of carbon composite materials and/or graphite and/or hard-baked carbon.
Description
Technical field
The present invention relates to a kind of according to the preamble of main claim for retrieving the hot rotary heat exchanger from waste gas.
Background technology
Such rotary heat exchanger is by being used suitable regenerative block that heat is passed to colder purifying gas flow from the untreated air-flow of heat.A plurality of heating element heaters form the regenerative block of regenerative heat exchanger.In these heat exchangers, represent that the heat exchanger plate of regenerative block or the mode that heat exchanger tube is such that their formation rotors (1) arrange.Heat is extracted from hot air-flow, and is released to colder air-flow.
In most of heat exchanger, also occur on the one hand by the condensation of steam and the exchange of moisture that caused by the evaporation of steam on the other hand.
Due to moisture, corrosive gas composition SO for example
2, SO
3, HCl, nitrogen oxide (NO
x) and the impact of dust, and due to common high temperature (up to more than 200 ℃), the atmosphere that is particularly conducive to corrosion process is prevailing in the region of heat exchanger plate or heat exchanger tube.
In known heat exchanger, heat exchanger plate or heat exchanger tube can be made by metal material, conventionally by the steel of carbon containing, are made.In order to protect heat exchanger plate or heat exchanger tube to avoid corrosion, the steel that is generally carbon containing provides enamel layer.
The aging of enamel plate can be explained by the combination of materials of steel and enamel, and due to different thermal coefficient of expansions, the combination of materials of steel and enamel is unsuitable for load variations frequently.
As this inevitably aging and relevant porous result of enamel layer, be positioned at the corrosion that steel plate is below subject to high level.For this reason, can only in limited scope, provide heat exchanger plate to being made by metal material or the protection of heat exchanger tube, and therefore their regular renewal is essential.According to the present invention, such heat exchanger plate or heat exchanger tube must be replaced completely after the running time of about 4 years.
When air-flow that use contains dust, the required regenerative block of regenerative heat exchanger is subject to further service requirement.Take air preheater on boiler plant or the regenerative block of the gas preheater on flue gas cleaning equipment is example, wherein the temperature of regenerative block is at least partly and/or provisionally lower than flue gas dew point, and form on regenerative block together with flying dust and/or other cigarette composition (for additive, the preparation of flue gas cleaning) or the area of heating surface of heating element heater on deposit.Described deposit has increased the through-flow pressure loss of regenerative block, and can cause in the worst case the blocking-up/obstruction completely of regenerative heat exchanger.
In order to improve dust tightness and to increase corrosion resistance, proposed to arrange on the surface that has been coated with the heating element heater of enamel plastic coating of fluoride (US6648061).The resistance to bond of fluoroplastics such as PTFE is known, but the relatively low erosion resisting of this coating is shortcoming.Due to limited erosion resisting, the heating element heater with plastic coating of fluoride is used in the regenerative heat exchanger that is exposed to the flue gas that contains particle for example can not have gratifying service life in the air preheater on coal-fired steam generator.The amount of the flying dust composition in flue gas can be more than 20g dust/Nm
3, there is the flow rate over 10m/s.
Regenerative heat exchanger comprises a plurality of heating element heaters or heat collector, described heating element heater or heat collector by hot gas for example flue gas heat, then described heating element heater or heat collector discharge the heat of storage to colder fluid for example air or gas.Such regenerative heat exchanger can be used as air preheater or the gas preheater in for example boiler plant and flue gas cleaning equipment.
Air preheater is constituted as and makes cold junction temperature more than the so-called temperature of making dirty (soiling temperature) according to prior art.The temperature of making dirty represent due to be down to dew point following and in cigarette condensate (sulfuric acid and/or sulfurous acid and/or other acid) glue into flying dust (ashes) and can be more for a long time with acceptable expense economically, control the temperature of sedimental formation.For example, because the regenerative block that plastic coating of fluoride has the heat accumulating element of resistance to bond or be made of plastics can not have gratifying service life because of the etching condition in air preheater, it also has the trend of generation creep and demonstrates disadvantageous creep behaviour.
Relatively low continuous running temperature is also the inferior position of plastics, and this has limited their use further, once and break down, there is security risk.And other security risk is the risk of catching fire.
However, for economic reasons, this relatively low continuous running temperature is better than being down to below dew point.Yet this causes still larger temperature difference and towards the additional trend of polluting, this needs further clean measure.
In order to protect stack gas desulfurization facility not corroded, EP1475597 proposes, to the shaped steel plate of the heating element heater for regenerative heat exchanger, acid-proof substrate enamel layer is set, and to its surface, anti-stick porcelain glaze coating is set.Yet therefore the etching problem that is positioned at the beneath steel plate of enamel layer still can not solve.In addition, anti-stick enamel is expensive.
The use of the heat exchanger plate of also making from the known polypropylene ketone of being strengthened by carbon fiber of DE4337895 or polybenzimidazoles.The regenerative block being made of plastics is expensive and disadvantageous, because they have low thermal capacity and heat conduction.The heat exchanger plate of even making with regard to the polypropylene ketone strengthened by carbon fiber or polybenzimidazoles, heat conduction and storage thermal capacity are also restricted, and they are only suitable in limited scope as the regenerative block using in rotary heat exchanger.
WO2001/045825 discloses a kind of for the method for gas treatment and relevant heat exchanger device then, and wherein special design is for the recovery of energy with for removing CO from waste gas or burning gases
2.
On the other hand, US2001/0047862A1 discloses special platelet heat exchangers, and it is as gas/gas or gas/liquid heat exchanger, and its fin and plate are generally made by carbon.
Better economy (better efficiency) for boiler plant, with regard to air preheater, find alap flue gas outlet temperature (flowing through regenerative heat exchanger effluent gas temperature afterwards), therefore also find the cold junction temperature of alap regenerative heat exchanger.With regard to SO
3with the flue gas that contains dust, due to fast deposition formation and poor cleaning capacity, up to the present, the horizontal dielectric imposed limits to cold junction temperature.
In order to have the economic power station operation of high efficiency and low emission, so the EGT in air preheater should reduce as far as possible, and this can only realize under the help of anticorrosion and the dustproof area of heating surface.
Summary of the invention
Therefore, problem of the present invention is to develop a kind of rotary heat exchanger, it has remunerative price design, even at high temperature and under corrosive atmosphere, also show improved anticorrosive property and longer service life, and its heating element heater has dust tightness, be corrosion resistant and erosion resistant, and additionally represented good hot memory capacity and heat conductivity, be fully heat-resisting and thermal fatigue resistance, and can originally manufacture with acceptable one-tenth economically in addition.
This problem is not limited to the corrosivity flue gas from coal combustion equipment certainly, and also extends to similarly other corrosive gas of regenerative heat exchanger, the corrosive gas for example occurring in steel mill.
It is also another problem of the present invention that heating element heater is provided, and the use of described heating element heater makes it possible to than prior art, further reduce EGT in coal-fired steam generator.
By providing a kind of rotary heat exchanger with regenerative block to address this problem, described rotary heat exchanger comprises heat exchanger plate or the heat exchanger tube being arranged in rotor (1), described heat exchanger plate or heat exchanger tube absorb from the heat of thermal current and by described heat and discharge to colder air-flow, it is characterized in that described heat exchanger plate or heat exchanger tube made by carbon composite and/or graphite and/or difficult fire coal.
According to rotary heat exchanger of the present invention, preferably by graphite or the difficult carbon or graphite and difficult combustion carbon of firing, made.
Can also be coated according to the heat exchanger plate of rotary heat exchanger of the present invention or heat exchanger tube.
Surprisingly, show, particularly preferred coating can be deposited on the differently quite coarse surface of heating element heater in the mode of viscosity extremely.Very thin layer is enough, preferably 20 to 200 μ m.Preferred coating material is PFA class (perfluoroalkoxy).PTFE (polytetrafluoroethylene (PTFE)), FEP (polytetrafluoroethylene (PTFE)-perfluoroethylene copolymer) or the coating of ETFE (ethylene-tetrafluoroethylene copolymer) are also applicable to.
New material combination has met according to character required for the present invention: resistance to bond and maximum corrosion resistance, that is, with regard to plastics, due to the use of carbon substrate, known permeability no longer works, because carbon itself is corrosion resistant.
Be designed to have according in the regenerative heat exchanger of heating element heater of the present invention, even if appear at the extreme decline below dew point, sedimental formation is also prevented from or at least can be controlled better, and this finally allows effluent gas temperature to be decreased to so far common below horizontal.Lower effluent gas temperature means the boiler efficiency of higher degree, therefore lower ratio CO
2discharge (the CO that the electric energy that per unit produces discharges
2quantity), and the equipment that is arranged on air preheater (electrofilter, flue gas cleaning equipment) downstream can be fabricated littlely (lower investment, lower operating cost).Further advantage is, is down to dew point following (thawing of sulfuric acid) and is accompanied by SO in flue gas
3/ H
2sO
4the reduction of concentration, has therefore reduced the danger of corroding in downstream equipment and has formed aerocolloidal danger.
For example, according to material with carbon element used in the present invention and/or carbon composite (carbon thermoplastic or carbon resin mixture) and/or raw material graphite and/or difficult fire coal, there is heat resistance and the corrosion resistance to Korrosionsmedium.Low-surface-energy due to these materials; so there is no dust granule or only have dust granule to be seldom deposited on the surface of such heat exchanger plate or heat exchanger tube, make to carry out more infrequently washing away of the required use hot water of common heat exchangers and process to remove deposition residues.
Yet; surprisingly; if needed; also can carry out more continually and wash away processing; this is because material according to the invention is the plate as regenerative block used herein or pipe in fact also bears frequently variations in temperature and can be not damaged, because the risk that does not for example exist enamel layer or other protective layer to peel off.
In addition, advantageously, compare with common rotary heat exchanger, material according to the invention is lighter, so the required drive unit of heat exchanger is less, and therefore causes lower energy consumption.And, in situation of the same area, higher than the conductibility of conventional material according to the conductibility of material used in the present invention.Therefore, such rotary heat exchanger stands larger load, that is, the higher handling capacity of corresponding exchange media is possible.
Further aspect of the present invention relates to the use according to rotary heat exchanger of the present invention.
Rely on its material, according to rotary heat exchanger of the present invention, be therefore used to retrieve from power station particularly the heat from the waste gas of stack gas desulfurization facility.
It can be used as pure gas preheating device or be used as air preheater or be even used as gas/water or gas/steam rotary heat exchanger.Rely on its material character, according to rotary heat exchanger of the present invention thereby be not limited to only for gas/gas-heat exchanger.
According to rotary heat exchanger of the present invention, advantageously with the manufacture of plug-in type (plug-in) method, and connect with form fit mode or friction lock mode, for example, can also use clamping means.Independent heat exchanger plate or heat exchanger tube combination with one another are to form plate group (2) or pipe group, and rotor (1) consists of described plate group (2) or pipe group.
A lot of die moulds of the required plate in region that use can carry out by means of the standard manufacturing process that is suitable for carbon goods, for example, by extruding, approach netted.Web wheel exterior feature can " scene " be implemented the adaptation of given heat exchanger.
Due to the described character of used material, according to the nearly 10 years service life of heat accumulating element of the present invention.
The flushing that heat exchanger plate preferably all stands 0.5 to 8 hour is processed.
Material according to the invention is preferably manufactured with known extrusion own.It is also preferred adopting the very economical pressing/molding method of binding agent-carbon mix or polymer-carbon compound or graphite compound.
Following accompanying drawing is for illustrating the present invention in the mode of example.In the drawings:
Fig. 1
1 rotor
2 plate groups
3 plates that vertically arrange with respect to airflow direction
Fig. 2
2 plate groups (2) (from the 4th box of the center of the rotor shown in Fig. 1 (1))
Reference numerals list
1 rotor
2 plate groups
3 plates that vertically arrange with respect to airflow direction
Claims (10)
1. a rotary heat exchanger with regenerative block, comprise the heat exchanger plate or the heat exchanger tube that are arranged in rotor (1), described heat exchanger plate or heat exchanger tube absorb from the heat of thermal current and by described heat and discharge to colder air-flow, it is characterized in that described heat exchanger plate or heat exchanger tube made by carbon composite and/or graphite and/or difficult fire coal.
2. rotary heat exchanger according to claim 1, is characterized in that described heat exchanger plate or heat exchanger tube made by graphite.
3. rotary heat exchanger according to claim 1, is characterized in that described heat exchanger plate or heat exchanger tube made by difficult fire coal.
4. according to the rotary heat exchanger described in any one in claims 1 to 3, it is characterized in that described heat exchanger plate or heat exchanger tube combination with one another are to form plate group and/or pipe group, by rotor (1) described in described plate group and/or pipe set constructor.
5. according to the rotary heat exchanger described in any one in claim 1 to 4, it is characterized in that described heat exchanger plate or heat exchanger tube are coated.
6. rotary heat exchanger according to claim 5, is characterized in that coating material selects the group of white perfluoroalkoxy.
7. rotary heat exchanger according to claim 5, is characterized in that coating material is selected from the group that comprises polytetrafluoroethylene (PTFE), polytetrafluoroethylene (PTFE)-perfluoroethylene copolymer and ethylene-tetrafluoroethylene copolymer.
8. according to the use of the rotary heat exchanger described in any one in claim 1 to 7, for retrieving the particularly heat of the waste gas of stack gas desulfurization facility of spontaneous power station.
9. according to the use of the rotary heat exchanger described in any one in claim 1 to 7, as pure gas preheating device or air preheater.
10. according to the use of the rotary heat exchanger described in any one in claim 1 to 7, as gas/water or gas/vapor rotary heat exchanger.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012203278.9 | 2012-03-01 | ||
| DE102012203278A DE102012203278A1 (en) | 2012-03-01 | 2012-03-01 | Rotary heat exchanger with heat exchanger plates or heat exchanger tubes made of carbon and graphite materials |
| PCT/EP2013/051974 WO2013127594A1 (en) | 2012-03-01 | 2013-01-31 | Rotation heat exchanger having heat exchanger plates or heat exchanger tubes made of carbon and graphite materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104204712A true CN104204712A (en) | 2014-12-10 |
Family
ID=47678764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380012114.1A Pending CN104204712A (en) | 2012-03-01 | 2013-01-31 | Rotation heat exchanger having heat exchanger plates or heat exchanger tubes made of carbon and graphite materials |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2820367A1 (en) |
| CN (1) | CN104204712A (en) |
| DE (1) | DE102012203278A1 (en) |
| WO (1) | WO2013127594A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015107476A1 (en) | 2015-05-12 | 2016-11-17 | Elringklinger Ag | Heat exchanger elements, in particular for flue gas purification systems of power plants |
| CN114110644B (en) * | 2021-11-25 | 2022-08-02 | 淄博金通电力科技有限公司 | Heating surface rotary air preheater and sealing assembly and preparation method thereof |
| DE102022003647A1 (en) | 2022-10-04 | 2024-04-04 | Thomas Brandmeier | Method for operating a rotary heat exchanger device and rotor storage mass |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4337895A1 (en) * | 1993-11-05 | 1995-05-11 | Leto Gmbh | Rotary heat exchanger for recovering heat from the exhaust air (waste air) of, in particular, flue gas desulphurisation plants (systems) |
| CN201593936U (en) * | 2010-01-26 | 2010-09-29 | 宁波市北仑银海机械制造有限公司 | Polytetrafluoroethylene impregnated graphite heat exchanger |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB685777A (en) * | 1950-03-17 | 1953-01-14 | Howden James & Co Ltd | Improvements in or relating to heat exchangers |
| US3058723A (en) * | 1955-03-14 | 1962-10-16 | Svenska Rotor Maskiner Ab | Regenerative heat exchangers |
| DE1117148B (en) * | 1958-01-04 | 1961-11-16 | Gea Luftkuehler Happel Gmbh | Heat exchangers, especially for liquid media that must not come into contact with one another |
| DE8417094U1 (en) * | 1984-06-05 | 1984-08-30 | Sigri Elektrographit Gmbh, 8901 Meitingen | STORAGE BODY FOR REGENERATOR |
| DE4319481C1 (en) * | 1993-06-11 | 1994-09-08 | Gea Luftkuehler Happel Gmbh | Connection of heat exchange (transfer) tubes, consisting of fluoroplastic, of a heat exchanger to a tube plate (sheet) |
| US20010047862A1 (en) * | 1995-04-13 | 2001-12-06 | Anderson Alexander F. | Carbon/carbon heat exchanger and manufacturing method |
| US6093504A (en) * | 1996-12-03 | 2000-07-25 | Bliesner; Wayne Thomas | Electro-chemical-thermal rechargeable energy storage cell (ECT cell) |
| DE19940627A1 (en) | 1999-08-27 | 2001-03-01 | Abb Patent Gmbh | Heating element for a regenerative heat exchanger and method for producing a heating element |
| NO316194B1 (en) * | 1999-12-22 | 2003-12-22 | Norsk Hydro As | Apparatus and method for treating a combustion gas stream |
| DE10320462B3 (en) | 2003-05-08 | 2005-03-03 | Alstom Power Energy Recovery Gmbh | Heating element for a regenerative heat exchanger and method for producing a heating element |
-
2012
- 2012-03-01 DE DE102012203278A patent/DE102012203278A1/en not_active Withdrawn
-
2013
- 2013-01-31 EP EP13702995.5A patent/EP2820367A1/en not_active Withdrawn
- 2013-01-31 CN CN201380012114.1A patent/CN104204712A/en active Pending
- 2013-01-31 WO PCT/EP2013/051974 patent/WO2013127594A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4337895A1 (en) * | 1993-11-05 | 1995-05-11 | Leto Gmbh | Rotary heat exchanger for recovering heat from the exhaust air (waste air) of, in particular, flue gas desulphurisation plants (systems) |
| CN201593936U (en) * | 2010-01-26 | 2010-09-29 | 宁波市北仑银海机械制造有限公司 | Polytetrafluoroethylene impregnated graphite heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013127594A1 (en) | 2013-09-06 |
| DE102012203278A1 (en) | 2013-09-05 |
| EP2820367A1 (en) | 2015-01-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141210 |