CN201897430U - Anti-corrosive structure for metal heat exchanger - Google Patents
Anti-corrosive structure for metal heat exchanger Download PDFInfo
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- CN201897430U CN201897430U CN2010206533524U CN201020653352U CN201897430U CN 201897430 U CN201897430 U CN 201897430U CN 2010206533524 U CN2010206533524 U CN 2010206533524U CN 201020653352 U CN201020653352 U CN 201020653352U CN 201897430 U CN201897430 U CN 201897430U
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- heat exchanger
- waste gas
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- damping wind
- wind section
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Abstract
The utility model relates to an anti-corrosive structure for a metal heat exchanger, which comprises a first section heat exchanger, a second section heat exchanger, a damping wind section and a bonnet cap from bottom to top, wherein the first section heat exchanger and the second section heat exchanger are respectively in a sleeve barrel structure, waste gas flows to the damping wind section from the bottom of the first section heat exchanger, and four vent holes vertical to the waste gas flowing direction are arranged above the damping wind section. The anti-corrosive structure is characterized in that the damping wind section is in a three-layer stainless steel pipe structure, the bottom of the damping winding section is provided with a sandwich layer inlet, and the sandwich layer inlet is communicated with the vent holes. The anti-corrosive structure has the advantages that the corrosion of the waste gas on the heat exchangers is reduced, and the service life of the heat exchangers is prolonged.
Description
Technical field
The utility model relates to a kind of glass fibre unit kiln metallic recuperator anticorrosion structure.
Background technology
The high-temp waste gas that the kiln internal combustion of glass fibre unit kiln produces has been taken away a large amount of heats in kiln, generally all adopt metallic recuperator to carry out UTILIZATION OF VESIDUAL HEAT IN.When these high-temp waste gas enter metallic recuperator, the heat of high-temp waste gas can pass to the cold air that enters simultaneously in the metallic recuperator by metallic recuperator, leaves metallic recuperator after the cold air endothermic temperature raises and enters kiln again and give combustion gas as combustion adjuvant or enter the oven for drying product.The heat of waste gas is obtained utilizing with regard to some again like this.Metallic recuperator mainly is made up of four parts, be respectively from bottom to top first segment heat exchanger 1 ', second the joint heat exchanger 2 ', damping wind section 3 ' and with army cap 4 '.First segment heat exchanger 1 ' and the second joint heat exchanger 2 ' be tube-in-tube structure, the inside leads to waste gas, logical cold air in the chuck, these two parts are because heat exchange is also being carried out, and heat exchanger adds the insulation measure, and EGT is higher, water vapour is difficult for condensing into water, does not produce corrosion substantially.Damping wind section 3 ' be the individual layer stainless steel tube, outer surface is not incubated, and four holes are arranged above, damping wind flows to the vertical waste gas that enters through four holes with waste gas, give the resistance of waste gas that flows, control the resistance size by regulating the damping air quantity, the final purpose that realizes the control furnace pressure.And then just enter damping wind section from the low temperature waste gas of the second joint heat exchanger 2 ' come out, because no insulation measure, the waste gas temperature drop quickens, add the adding of damping cold wind, temperature descends faster, so the water vapour in damping wind section 3 ' waste gas very easily condenses into water, regeneration acid corrosion stainless steel tube wall.With army cap 4 ' be equivalent to a lid on damping wind section 3 ' top, play the effect of discharging waste gas, its corrosion situation is with damping wind section 3 ' the same.
The waste gas major part of coming out from kiln is produced by burning, main component is carbon dioxide and water, but contain a spot of sulphur in the fuel, sulphur generates sulfur dioxide after burning, in addition, also contain sulphur, sulfate and fluoride etc. in the frit, these materials enter in the waste gas through high-temperature oxydation and decomposition generation sulfur dioxide and gaseous fluorine after entering kiln.After waste gas is through the heat exchanger heat exchange, reduce to low temperature by high temperature, and temperature is lower under the effect of heat exchanger damping wind section adding cold air, as long as the Tube Sheet of Heat Exchanger wall temperature is near or below the dew point of water, steam will condense into water, water again with waste gas in sulfur dioxide and fluorine reaction generate sulfuric acid and hydrofluoric acid, this two kinds of acid acid extremely strong, very easily corroding metal heat exchanger stainless steel tube wall.Therefore the pure oxygen burning technology is used in unit kiln, exhausted air quantity reduces nearly 80% like this, and the concentration of water vapour is higher in the waste gas, and the amount of sulfur dioxide of mainly overflowing from batch and gaseous fluorine is constant, so just cause that sulfur dioxide and the concentration of gaseous fluorine in waste gas significantly improve in the waste gas, and be subjected to the influence of sulfur dioxide concentration, the dew point of water raises, waste gas is through the easier water that condenses into just behind the heat exchanger, easier generation sulfuric acid and hydrofluoric acid, the corrosion of aggravation heat exchanging organ pipe wall.
Summary of the invention
The utility model will overcome existing metallic recuperator above shortcomings, provides a kind of and has reduced the corrosion of waste gas heat exchanging device and prolong the heat exchanger metallic recuperator anticorrosion structure in service life.
The technical solution of the utility model is:
The metallic recuperator anticorrosion structure, comprise from bottom to top first segment heat exchanger, the second joint heat exchanger, damping wind section and with army cap, the described first segment heat exchanger and the second joint heat exchanger are tube-in-tube structures, waste gas flows to described damping wind section from the bottom of described first segment heat exchanger, the top of described damping wind section is provided with waste gas and flows to four vertical air vents, it is characterized in that: described damping wind Duan Weisan layer stainless-steel pipe structure, its bottom is provided with the interlayer inlet, and described interlayer inlet is communicated with described air vent.
Further, the outer surface of described damping wind section increases attemperator, and described outer surface with army cap increases attemperator.
Technical conceive of the present utility model is: change damping wind section into three-decker by original single layer structure, damping wind is carried out preheating and after its outer surface increases attemperator, damping wind enters waste gas again through after the preheating, can reduce waste-gas heat and scatter and disappear, prevent that EGT from descending too low and cause water recovery in the waste gas to become water reuse (treatment to become acid corrosion damping wind section and with army cap.
During use, the first segment heat exchanger and the second joint heat exchanger are tube-in-tube structures, and the inside leads to waste gas, logical cold air in the chuck, these two parts are also carrying out owing to heat exchange, and heat exchanger adds attemperator, EGT is higher, and water vapour is difficult for condensing into water, does not produce corrosion substantially.Damping wind section is three layers of stainless-steel pipe structure, outer surface is set up attemperator, damping wind enters interlayer by the interlayer inlet, flowing to vertical air vent from four with waste gas again after the preheating enters damping wind intersegmental part and mixes with waste gas, give the resistance of waste gas that flows, control the resistance size by regulating the damping air quantity, the final purpose that realizes the control furnace pressure.
Advantage of the present utility model: reduce the corrosion of waste gas heat exchanging device, prolong heat exchanger service life.
Description of drawings
Fig. 1 is the structural representation schematic diagram of existing metallic recuperator.
Fig. 2 is a structural representation of the present utility model.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples:
With reference to Fig. 2, metallic recuperator anticorrosion structure described in the utility model, comprise first segment heat exchanger 1 from bottom to top, the second joint heat exchanger 2, damping wind section 3 and with army cap 4, the described first segment heat exchanger 1 and the second joint heat exchanger 2 are tube-in-tube structures, waste gas flows to described damping wind section 3 from the bottom of described first segment heat exchanger 1, the top of described damping wind section 3 is provided with waste gas and flows to four vertical air vents 5, described damping wind section 3 is three layers of stainless-steel pipe structure, its bottom is provided with interlayer inlet 6, and described interlayer inlet 6 is communicated with described air vent 5.
The outer surface of described damping wind section 3 increases attemperator, and described outer surface with army cap 4 increases attemperator.
Technical conceive of the present utility model is: change damping wind section 3 into three-decker by original single layer structure, damping wind is carried out preheating and after its outer surface increases attemperator, damping wind enters waste gas again through after the preheating, can reduce waste-gas heat and scatter and disappear, prevent that EGT from descending too low and cause water recovery in the waste gas to become water reuse (treatment to become acid corrosion damping wind section 3 and with army cap 4.
During use, the first segment heat exchanger 1 and the second joint heat exchanger 2 are tube-in-tube structures, and the inside leads to waste gas, logical cold air in the chuck, these two parts are also carrying out owing to heat exchange, and heat exchanger adds attemperator, EGT is higher, and water vapour is difficult for condensing into water, does not produce corrosion substantially.Damping wind section 3 is three layers of stainless-steel pipe structure, outer surface is set up attemperator, damping wind enters interlayer by interlayer inlet 6, flow to vertical air vent 5 from four with waste gas again after the preheating and enter that damping wind section 3 is inner mixes with waste gas, give the resistance of waste gas that flows, control the resistance size by regulating the damping air quantity, the final purpose that realizes the control furnace pressure.
The described content of this specification embodiment only is enumerating the way of realization of utility model design; protection domain of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection domain of the present utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.
Claims (2)
1. metallic recuperator anticorrosion structure, comprise from bottom to top first segment heat exchanger, the second joint heat exchanger, damping wind section and with army cap, the described first segment heat exchanger and the second joint heat exchanger are tube-in-tube structures, waste gas flows to described damping wind section from the bottom of described first segment heat exchanger, the top of described damping wind section is provided with waste gas and flows to four vertical air vents, it is characterized in that: described damping wind Duan Weisan layer stainless-steel pipe structure, its bottom is provided with the interlayer inlet, and described interlayer inlet is communicated with described air vent.
2. metallic recuperator anticorrosion structure according to claim 1 is characterized in that: the outer surface of described damping wind section increases attemperator, and described outer surface with army cap increases attemperator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206533524U CN201897430U (en) | 2010-12-11 | 2010-12-11 | Anti-corrosive structure for metal heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206533524U CN201897430U (en) | 2010-12-11 | 2010-12-11 | Anti-corrosive structure for metal heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201897430U true CN201897430U (en) | 2011-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206533524U Expired - Lifetime CN201897430U (en) | 2010-12-11 | 2010-12-11 | Anti-corrosive structure for metal heat exchanger |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110605A (en) * | 2015-07-29 | 2015-12-02 | 无锡市新欣建材设备有限公司 | Circular seam type high temperature heat exchanger |
| CN113797579A (en) * | 2021-08-17 | 2021-12-17 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Instrument for stainless steel nitric acid method intergranular corrosion test and use method |
-
2010
- 2010-12-11 CN CN2010206533524U patent/CN201897430U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110605A (en) * | 2015-07-29 | 2015-12-02 | 无锡市新欣建材设备有限公司 | Circular seam type high temperature heat exchanger |
| CN113797579A (en) * | 2021-08-17 | 2021-12-17 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Instrument for stainless steel nitric acid method intergranular corrosion test and use method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110713 |
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| CX01 | Expiry of patent term |