# US 2014/0196873 A1 · Method and device for protecting heat exchanger pipes and a ceramic component

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- Number: US 2014/0196873 A1
- Document ID: US20140196873A1
- Status: Published application
- Kind: A1
- Application number: 14/153,487
- Filed: 2014-01-13
- Published: 2014-07-17
- Earliest claimed: 2013-01-14
- Assignees: Martin GmbH fuer Umwelt- und Energietechnik
- Applicants: Martin GmbH fuer Umwelt- und Energietechnik
- Inventors: Toralf WEBER; Johannes MARTIN
- Web page: https://patentgrep.com/patent/US20140196873A1

## CPC

- F28F 19/002: {by using inserts or attachments}
- F23J 3/023: {cleaning the fireside of watertubes in boilers}
- F28D 7/06: the conduits having a single U-bend (F28D7/10 takes precedence){(F28D7/0016 and F28D7/0033 take precedence)}
- F22B 21/30: bent in U-loop form
- F22B 37/107: {Protection of water tubes}
- F22G 3/008: {Protection of superheater elements, e.g. cooling superheater tubes during starting-up periods, water tube screens}
- F23M 5/085: {using air or other gas as the cooling medium}
- F23M 2900/05001: Preventing corrosion by using special lining materials or other techniques
- F28F 21/04: of ceramic; of concrete; of natural stone
- Y02E 20/12: Heat utilisation in combustion or incineration of waste
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- F23J: REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES (combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G7/06)
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- F22B: METHODS OF STEAM GENERATION; STEAM BOILERS
- F22G: SUPERHEATING OF STEAM
- F23M: CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

In a method for protecting heat exchanger pipe in boiler systems having at least one heat exchanger pipe, which is surrounded by a ceramic component, into which flue gas is directed from at least two opposite sides, gas is introduced between the heat exchanger pipe and the ceramic component.

## Claims

### Claim 1

A method for protecting heat exchanger pipes (10) in boiler systems (1) having at least one heat exchanger pipe (10), which is surrounded by a ceramic component (6), into which flue gas is directed from at least two opposite sides wherein gas is fed into a space (48, 49, 50) adjacent to heat exchanger pipe (10) and ceramic component (6).

### Claim 2 (depends on 1)

The method according to claim 1, wherein space (48, 49, 50) is formed by the heat exchanger pipe (10) and the ceramic component (6).

### Claim 3 (depends on 1)

The method according to claim 1, wherein the gas is fed in at the hottest point between the heat exchanger pipe (10) and the component (6).

### Claim 4 (depends on 1)

The method according to claim 1, wherein the gas is fed through a gas pipe (13) that is routed through the ceramic component (6).

### Claim 5 (depends on 1)

The method according to claim 1, wherein the gas is fed in at multiple points.

### Claim 6 (depends on 5)

The method according to claim 5, wherein the gas is fed in through a plurality of apertures (51, 52, 53) arranged at a distance from each other in a gas pipe (13) along the length of the heat exchanger pipe (10).

### Claim 7

A device having a heat exchanger pipe, of which the circumferential surface is surrounded by at least one ceramic component (6), comprising a gas infeed (12) to a space (48, 49, 50) adjacent to the heat exchanger pipe (10) and the ceramic component (6).

### Claim 8 (depends on 7)

The device according to claim 7, wherein the gas infeed (12) comprises a fan (9).

### Claim 9 (depends on 7)

The device according to claim 7, wherein the gas infeed (12) comprises a gas pipe (13) that passes through the ceramic component (6).

### Claim 10 (depends on 7)

The device according to claim 7, wherein the heat exchanger pipe (10) is bent in an U-shape and the gas infeed (12) ends in the area of the bend (35).

### Claim 11 (depends on 9)

The device according to claim 9, wherein the gas pipe (13) is furnished with a plurality of apertures (51, 52, 53) at a distance from each other along the length of the heat exchanger pipe (10).

### Claim 12

A ceramic component (6) containing preferably more than 85 percent silicon carbide and consisting of at least two cuboid ceramic elements (7) having a cross section of arcuate corrugations (34) that are secured to each other by mating corrugation troughs, so that two heat exchanger pipe sections can be arranged in two opposing corrugation troughs (36, 37 and 38, 39), and a gas feed pipe section can be arranged in two opposing corrugation troughs (40, 41) between said pair of corrugation troughs.