CN109631076A - A kind of air preheater - Google Patents
A kind of air preheater Download PDFInfo
- Publication number
- CN109631076A CN109631076A CN201910017738.1A CN201910017738A CN109631076A CN 109631076 A CN109631076 A CN 109631076A CN 201910017738 A CN201910017738 A CN 201910017738A CN 109631076 A CN109631076 A CN 109631076A
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- CN
- China
- Prior art keywords
- heat storage
- storage plate
- heat
- cylinder
- temperature
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/02—Arrangements of regenerators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Supply (AREA)
Abstract
The invention belongs to Industrial Boiler fields, more particularly to a kind of helicoid air preheater, it includes heat exchanging part, data portion and control unit, its heat exchanging part is used for will be after the heat storage in high-temperature flue gas, its heat is discharged into air again, so that air is entered after being preheated in the combustion chamber of Industrial Boiler, data portion is used to detect the temperature of high-temperature flue gas, and control unit goes the operation of control heat exchanging part according to the data that data portion detects.The present invention make flue gas reach heat storage plate tail end will not be accumulated on sulfide to heat storage plate because own temperature is too low, be effectively prevented from heat storage plate cure object corrosion.
Description
Technical field
The invention belongs to Industrial Boiler field, in particular to a kind of helicoid air preheater.
Background technique
Rotary regenerative air preheater is that heat is transmitted with regeneration, and flue gas and air alternately pass through heating surface, work as cigarette
Air-flow is out-of-date, and heat is transmitted to heating surface from flue gas, and heating surface temperature increases, and puts aside energy, when air again passes through, heating surface
The heat of savings is put to air.The patented product of State Grid Corporation of China, a kind of air preheater integrate in air preheater
SCR catalyst, can eliminate the NH to escape in SCR denitration device using the SCR catalyst in the air preheater3 , thus
Air preheater is avoided to block (bibliography CN105674323A).The patented product of Tsinghua University, a kind of multichannel are rotary
Air preheater makes air preheater rotor frequently pass through hot fume and cold air, to realize that lower smoke temperature is circumferential
Deviation and temperature circumferential direction deviation, and minimum exhaust gas temperature and minimum shaft temperature are improved under the conditions of same exhaust gas temperature, it avoids
Partial fume enters dew point area too early in air preheater flue, reduces cold end heat storage plate moisture condensation, is stained with ash, burn into blocking etc. and asking
It inscribes (bibliography CN204829997U).
Summary of the invention
The present invention provides a kind of helicoid air preheaters, can change flue gas and air preheat according to flue-gas temperature
The contact area of heat storage plate in device improves the performance of the low temperature resistant corrosion of air preheater.
It includes preheating cylinder, the exhaust gases passes being set to above preheating cylinder and being set to below preheating cylinder
Cold air channel, exhaust gases passes and cold air channel are respectively arranged in two non-conterminous vertical spaces,
The preheating cylinder includes heat exchanging part, data portion and control unit,
The heat exchanging part includes rotating cylinder component and electric machine assembly,
The rotating cylinder component includes interior rotating cylinder, outer rotaring tube, and multi-disc rectangle made of stalloy the first heat storage plate and
Second heat storage plate, interior rotating cylinder are set to the center of preheating cylinder, connect the first accumulation of heat of multi-disc on the vertical direction of outer wall
Piece, outer rotaring tube are set to the periphery of interior rotating cylinder, connect the second heat storage plate of multi-disc on the vertical direction of inner wall, the first heat storage plate with
Second heat storage plate is evenly spaced in the region between inside and outside rotating cylinder with being bonded to each other；
The electric machine assembly includes the first motor connecting with interior rotating cylinder, and the second motor connecting with outer rotaring tube；
High-temperature flue gas is from top to bottom passed into preheating cylinder, and the part heat storage plate preheated in cylinder is heated, and electric machine assembly will
Heated heat storage plate rotates to the top of cold air channel, and cold air from bottom to top enters in preheating cylinder, and cold air is inhaled
Heat is at hot-air；
The data portion includes:
Temperature sensor is used to detect the temperature of flue gas；
Range sensor is set between two adjacent first heat storage plates and the second heat storage plate, for detecting the first heat storage plate
The distance between second heat storage plate；
The control unit is configured as:
When the flue-gas temperature value is less than or equal to the standard value of setting, controls first motor and the second motor rotates at the same speed,
Adjacent the first heat storage plate and the second heat storage plate is set to keep fitting, the heating surface of heat storage plate is few, heat exchange of the flue gas in preheating cylinder
The speed of low efficiency, flue-gas temperature decline is slow, to will not store because temperature is too low when flue gas being made to reach heat storage plate tail end
Backing tail end accumulates the sulfide of corrodible heat storage plate；
When the flue-gas temperature value is greater than standard value, first motor and the rotation of the second motor friction speed are controlled, then the first heat storage plate
Become the state of being staggered from fit-state due to rotational speed difference with the second heat storage plate, increase the heating surface of heat storage plate, is changed with improving
The thermal efficiency；When range sensor detects that the distance between two adjacent first heat storage plates and the second heat storage plate are first distance
When, then control first motor and the second motor rotates at the same speed.
The beneficial effects of the present invention are: the present invention adjusts the first heat storage plate and second in preheating cylinder according to flue-gas temperature
The distance between heat storage plate reduces the vulcanization of corrodible heat storage plate in flue gas to change the heat exchange efficiency of air preheater
The accumulation of object.
Detailed description of the invention
Fig. 1 shows preheater schematic diagram；
Fig. 2 shows preheater composition block diagrams.
Specific embodiment
With reference to the accompanying drawings, the function that the structure of this system is described in detail and is realized.
A kind of rotary regenerative air preheater for coal-burning boiler comprising preheating cylinder is set to above preheating cylinder
Exhaust gases passes and the cold air channel that is set to below preheating cylinder, exhaust gases passes and cold air channel are respectively arranged on two
In a non-conterminous vertical space, which is characterized in that
The preheating cylinder includes heat exchanging part 1, data portion 2 and control unit 3,
The heat exchanging part includes rotating cylinder component 11 and electric machine assembly 12,
The rotating cylinder component 11 includes interior rotating cylinder 111, outer rotaring tube 112, and the first of multi-disc rectangle made of stalloy
Heat storage plate 113 and the second heat storage plate 114, interior rotating cylinder 111 is set to the center of preheating cylinder, on the vertical direction of outer wall
The first heat storage plate of multi-disc 113 is connected, outer rotaring tube 112 is set to the periphery of interior rotating cylinder, connects multi-disc on the vertical direction of inner wall
Second heat storage plate 114, the first heat storage plate 113 and the second heat storage plate 114 are evenly spaced between inside and outside rotating cylinder with being bonded to each other
In region；
The electric machine assembly 12 includes the first motor 121 connecting with interior rotating cylinder 111, and second connect with outer rotaring tube 112
Motor 122；
High-temperature flue gas is from top to bottom passed into preheating cylinder, and the part heat storage plate preheated in cylinder is heated, and electric machine assembly will
Heated heat storage plate rotates to the top of cold air channel, and cold air from bottom to top enters in preheating cylinder, and cold air is inhaled
Heat is at hot-air；
The data portion 2 includes:
Temperature sensor 21 is used to detect the temperature of flue gas；
Range sensor 22 is set between two adjacent first heat storage plates and the second heat storage plate, for detecting the first accumulation of heat
The distance between piece and the second heat storage plate；
The control unit 3 is configured as:
When the flue-gas temperature value is less than or equal to the standard value of setting, controls first motor 121 and the second motor 122 is synchronized
Rotation makes adjacent the first heat storage plate 113 and the second heat storage plate 114 keep fitting, and the heating surface of heat storage plate is few, and flue gas is preheating
Heat exchange efficiency in cylinder is low, and the speed of flue-gas temperature decline is slow, thus when flue gas being made to reach heat storage plate tail end, it will not be because of temperature
It is too low and accumulate the sulfide of corrodible heat storage plate in heat storage plate tail end；
When the flue-gas temperature value is greater than standard value, control first motor 121 and the rotation of 122 friction speed of the second motor, then first
Heat storage plate 113 and the second heat storage plate 114 become the state of being staggered due to rotational speed difference and from fit-state, increase the heating surface of heat storage plate
Add, to improve heat exchange efficiency；When range sensor detects two adjacent the distance between the first heat storage plates and the second heat storage plate
When for first distance, then control first motor 121 and the second rotation at the same speed of motor 122.
One skilled in the art would recognize that without departing substantially from the spirit and scope of the invention as generally describing,
Various variations and/or modification can be carried out to invention shown in each specific embodiment.Therefore, in terms of all
For, embodiment here is considered as illustrative and and non-limiting.Equally, the present invention includes any feature
Combination, the combination of any feature especially in Patent right requirement, even if the combination of this feature or feature is not in patent
It is explicitely stated in claim or each embodiment here.
Claims (2)
1. a kind of air preheater, which is characterized in that the accumulation of heat in its temperature automatic adjustment flue gas and preheater according to flue gas
The contact area of piece changes the heat exchange efficiency of air preheater.
2. a kind of air preheater comprising preheating cylinder is set to the exhaust gases passes preheated above cylinder and is set to pre-
Cold air channel below hot cylinder, exhaust gases passes and cold air channel are respectively arranged in two non-conterminous vertical spaces,
It is characterized in that,
The preheating cylinder includes heat exchanging part, data portion and control unit,
The heat exchanging part includes rotating cylinder component and electric machine assembly,
The rotating cylinder component includes interior rotating cylinder, outer rotaring tube, and multi-disc rectangle made of stalloy the first heat storage plate and
Second heat storage plate, interior rotating cylinder are set to the center of preheating cylinder, connect the first accumulation of heat of multi-disc on the vertical direction of outer wall
Piece, outer rotaring tube are set to the periphery of interior rotating cylinder, connect the second heat storage plate of multi-disc on the vertical direction of inner wall, the first heat storage plate with
Second heat storage plate is evenly spaced in the region between inside and outside rotating cylinder with being bonded to each other；
The electric machine assembly includes the first motor connecting with interior rotating cylinder, and the second motor connecting with outer rotaring tube；
High-temperature flue gas is from top to bottom passed into preheating cylinder, and the part heat storage plate preheated in cylinder is heated, and electric machine assembly will
Heated heat storage plate rotates to the top of cold air channel, and cold air from bottom to top enters in preheating cylinder, and cold air is inhaled
Heat is at hot-air；
The data portion includes:
Temperature sensor is used to detect the temperature of flue gas；
Range sensor is set between two adjacent first heat storage plates and the second heat storage plate, for detecting the first heat storage plate
The distance between second heat storage plate；
The control unit is configured as:
When the flue-gas temperature value is less than or equal to the standard value of setting, controls first motor and the second motor rotates at the same speed,
Adjacent the first heat storage plate and the second heat storage plate is set to keep fitting, the heating surface of heat storage plate is few, heat exchange of the flue gas in preheating cylinder
The speed of low efficiency, flue-gas temperature decline is slow, to will not store because temperature is too low when flue gas being made to reach heat storage plate tail end
Backing tail end accumulates the sulfide of corrodible heat storage plate；
When the flue-gas temperature value is greater than standard value, first motor and the rotation of the second motor friction speed are controlled, then the first heat storage plate
Become the state of being staggered from fit-state due to rotational speed difference with the second heat storage plate, increase the heating surface of heat storage plate, is changed with improving
The thermal efficiency；When range sensor detects that the distance between two adjacent first heat storage plates and the second heat storage plate are first distance
When, then control first motor and the second motor rotates at the same speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910017738.1A CN109631076A (en) | 2019-01-09 | 2019-01-09 | A kind of air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910017738.1A CN109631076A (en) | 2019-01-09 | 2019-01-09 | A kind of air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109631076A true CN109631076A (en) | 2019-04-16 |
Family
ID=66060428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910017738.1A Pending CN109631076A (en) | 2019-01-09 | 2019-01-09 | A kind of air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109631076A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010009124A1 (en) * | 2000-01-25 | 2001-07-26 | Minoru Suzuki | Method for decarbonating waste gas and decarbonating apparatus |
| CN1335926A (en) * | 1999-02-17 | 2002-02-13 | 阿尔斯托姆电力公司 | Heat and mass transfer element assembly |
| CN103195926A (en) * | 2013-03-31 | 2013-07-10 | 广州瑞威能源科技有限公司 | Double-piece differential type sealing device of annular guide rail support |
| CN104019695A (en) * | 2014-06-27 | 2014-09-03 | 上海市东方海事工程技术有限公司 | Laser-type air pre-heater air leakage control system and control method thereof |
| CN204100284U (en) * | 2014-09-18 | 2015-01-14 | 国电龙源节能技术有限公司 | The rotary regenerative air preheater that a kind of aisle spare is adjustable |
| CN204923058U (en) * | 2015-07-10 | 2015-12-30 | 中国电力工程顾问集团中南电力设计院有限公司 | Variation type quartering storehouse rotation air preheater |
-
2019
- 2019-01-09 CN CN201910017738.1A patent/CN109631076A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1335926A (en) * | 1999-02-17 | 2002-02-13 | 阿尔斯托姆电力公司 | Heat and mass transfer element assembly |
| US20010009124A1 (en) * | 2000-01-25 | 2001-07-26 | Minoru Suzuki | Method for decarbonating waste gas and decarbonating apparatus |
| CN103195926A (en) * | 2013-03-31 | 2013-07-10 | 广州瑞威能源科技有限公司 | Double-piece differential type sealing device of annular guide rail support |
| CN104019695A (en) * | 2014-06-27 | 2014-09-03 | 上海市东方海事工程技术有限公司 | Laser-type air pre-heater air leakage control system and control method thereof |
| CN204100284U (en) * | 2014-09-18 | 2015-01-14 | 国电龙源节能技术有限公司 | The rotary regenerative air preheater that a kind of aisle spare is adjustable |
| CN204923058U (en) * | 2015-07-10 | 2015-12-30 | 中国电力工程顾问集团中南电力设计院有限公司 | Variation type quartering storehouse rotation air preheater |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190416 |