CN205878220U - Coal fired boiler combination formula air heater - Google Patents
Coal fired boiler combination formula air heater Download PDFInfo
- Publication number
- CN205878220U CN205878220U CN201620730132.4U CN201620730132U CN205878220U CN 205878220 U CN205878220 U CN 205878220U CN 201620730132 U CN201620730132 U CN 201620730132U CN 205878220 U CN205878220 U CN 205878220U
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- air
- air preheater
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- 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
Abstract
The utility model provides a coal fired boiler combination formula air heater, including evaporator tube bank, closed tube, hot quantity adjustor, level gauge, UNICOM's nest of tubes, temperature measuring device, controller, control valve, feed pipe, first order air heater, exhaust steam valve, hot quantity adjustor is located the evaporator tube bank top, and first order air heater is located hot quantity adjustor top, evaporator tube bank's upper end is linked together with hot quantity adjustor through the pipeline, and hot quantity adjustor and first order air heater are linked together through UNICOM's nest of tubes, evaporator tube bank locates in the flue. The utility model discloses improve the sour dewfall of coal fired boiler air heater, deposition problem, solved the unable air heater of the use problem of small -size coal fired boiler, increased substantially small -size coal fired boiler's efficiency.
Description
Technical field
This utility model relates to air classification heating system and device, refers in particular to a kind of coal-burning boiler combination type air preheating
Device.
Background technology
Background 1: the threat that coal-burning boiler air preheater faces
SO in fire coal boiler fume3Formation H is combined with steam2SO4Steam, when heating surface temperature is less than acid dew point,
There is sulfuric acid solution in heating surface, and its result is: (1) heated surface corrosion, perforation；(2) in the absorption of the acid solution on heating surface flue gas
Flying dust, forms " caking property " dust stratification, impact heat transfer.Time serious, acid corrosion causes the structure of heat exchanger and performance to be destroyed, and impact is just
Often produce, even there will be security incident.
Background 2: the behaviour in service of existing coal-burning boiler air preheater
Low capacity low parameter coal-burning boiler does not the most use air preheater.
Considerable coal-fired boiler uses tubular air preheater.
Station boiler uses rotary regenerative air preheater.
Background 3: case study present on the use of existing coal-burning boiler air preheater
(1) low capacity low parameter coal-burning boiler does not use air preheater.Due to air preheater face burn into dust stratification,
Blocking and operational management problem, low capacity low parameter coal-burning boiler uses air preheater to reclaim low temperature heat energy, and cost performance is low, because of
This, for independent enterprise, abandon waste heat recovery, select fume high-temperature smoke evacuation, be the most to one's profit.At present 10t/h and with
Lower boiler, exhaust gas temperature is more than 180 DEG C.China's low capacity low parameter boiler customer volume is big, wide, and fume high-temperature discharges whole
The energy-saving and emission-reduction of individual country are totally unfavorable.
(2) considerable coal-fired boiler uses shell-and-tube air preheater.Considerable coal-fired boiler uses shell-and-tube air pre-
Hot device preheated air, recovery heat energy, significantly improve the thermal efficiency of boiler, and improve boiler combustion situation, ideally, and its joint
The income that can bring is apparently higher than equipment investment and maintenance cost, and corrosion failure problem can be controlled in the Maintenance of Boiler cycle
In, and can quick-replaceable is corroded within the maintenance interval preheater assembly.
But, shell-and-tube air preheater is to utilize cold (air) heat (flue gas) fluid to be realized by wall-type heat exchange,
According to heat transfer principle, the air side import department wall surface temperature of tubular air preheater is minimum, certainly will cause countercurrent flow side
The wall temperature of the flue gas side correspondence position of formula (during design frequently with) is minimum, in order to avoid occurring acid condensation to go out at minimum wall temperature
Existing corrosion phenomenon, generally employ conservative design method: be the first design parameter with minimum wall temperature (higher than acid dew point), smoke evacuation temperature
Degree obeys the needs of minimum wall temperature.The result of this design concept is: in normal conditions, and minimum wall temperature is with exhaust gas temperature often
Need to differ 60 DEG C～80 DEG C, if ambient temperature changes, heat exchanger minimum wall temperature certainly will be caused to change.As:
In very long winter, south air themperature can low to about 0 DEG C, the north air themperature can low to-30 DEG C, tubular air preheater
Minimum wall temperature is inevitably less than original design value, and acid condensation is inevitable, even if minimum wall temperature differs more than 100 DEG C also with exhaust gas temperature
Wall acid dewing corrosion problem cannot be solved.Acid condensation once occur, heating surface begins to burn into dust stratification, until perforation
Damaged, gas leakage, causes substantial amounts of cold air to enter in flue gas, and exhaust gas temperature void is low；Simultaneously as substantial amounts of cold air enters cigarette
Gas, supplies the air needed for boiler again, adds the absorbing quantity of aerator and air-introduced machine, causes fan energy consumption significantly to increase
Add.
Certainly, the great advantage of tubular air preheater is good airproof performance, corrosion failure once occurs, and this advantage disappears
Lose；But, in order to avoid acid condenses, the design with wall surface temperature as foundation sacrifices substantial amounts of low temperature exhaust heat, to energy-saving and emission-reduction
For unfavorable.Practice have shown that, because the change of ambient temperature, arise that during the shell-and-tube air preheater not up to maintenance interval and be subject to
Hot side serious damage, serious string wind phenomenon, have impact on the performance of boiler and the thermal efficiency of boiler.
(3) station boiler uses rotary regenerative air preheater.Rotary regenerative air preheater is to utilize cold (air) heat (cigarette
Gas) fluid carries out contact heat exchange alternately through thermophore element (corrugated plating), and its advantage is: heat transfer rate is fast, heat-transfer intensity
Greatly, volume is little；Although acid condensation and fouling phenomenon are inevitable, but main frame structure is corrosion-resistant, thermophore component module formula
Design and arranging so that it is can be facilitated by after corrosion failure, convenient replacing.
But, rotary regenerative air preheater has the drawback that significantly.
Leak out.This is rotary regenerative air preheater fault of construction.Huge heat storage or flue air channel relative rotary motion,
Gap between fume side and air side, exist for directly leaking out (fluid that pressure is high flows to, by gap, the fluid that pressure is low,
I.e. air enters flue gas) and carry air leakage phenomena.Generally, First air, secondary wind by the gap of Sectorial sealplate to
Leaking in air, flue gas, when device crudy is good, air leak rate of air curtain is 6%～8%, and after running a period of time, gap becomes big,
Air leak rate of air curtain is 8%～12%, crudy or when safeguarding not in place, air leak rate of air curtain is 15%～30%.The result leaked out is: flue gas
The cold air ginseng being compromised is mixed, and heat recovery efficiency reduces；Meanwhile, in order to ensure that boiler is properly functioning, need strengthen the blow rate required and
Absorbing quantity, thus increases considerably aerator and air-introduced machine energy consumption.
Literature research and Theoretical Calculation show, rotary air preheater air leak rate often reduces 1%, Thermal generation unit
Net coal consumption rate will reduce about 0.15g/ (kWh), calculates according to the average air leak rate of air curtain of rotary regenerative air preheater 10%, solves air pre-
Hot device Air Leakage, the annual generating in the whole nation can be saved mark coal and about be surpassed ten million ton.
Acid condensation, dust stratification and blocking.When air, flue gas periodically flow through corrugated plating heat release, corrugated plating temperature cycle
Property ground uprise by high step-down and by low, its surface can occur acid condensation, acid solution Evaporation Phenomenon therewith.Acid solution absorption on heating surface
Dust in flue gas, rear acid solution is evaporated, and produces " caking property " dry dust stratification, gradually blocks gas channel, forms ash stifled.Dust stratification is with stifled
The result of plug is: heat exchange amount is gradually lowered, and smoke flow resistance increases, and increases fan energy consumption；" caking property " dust stratification cleaning difficulty,
Deashing need to be shut down time serious.
As can be seen here, the application of rotary regenerative air preheater, although the problem solving tubular air preheater, also exposes
The serious of self lacks filling.
At present, Power Boilers Design level and operation level are the highest, want to improve further the thermal efficiency of boiler controller system, change
The preheating method entering air preheater is the important direction improving the thermal efficiency.
In a word, the form disunity of coal-burning boiler air preheater, illustrate that air preheat technology is not perfect, all there is nothing
The problem that method is gone beyond: heating surface acid condenses, corrodes and dust stratification, and these cause boiler thermal output to decline, and steam generator system performance is divided not
Stable.
At present, home and abroad uses More General Form about coal-burning boiler, can improve the air preheat of boiler thermal output further
The document of device is little.
But, the high-temperature flue gas for large-sized boiler discharges, and the document of recovery waste heat is a lot, such as patent documentation
CN1619246A (2004.10.28) " a kind of avoid boiler air preheater corrosion cold end corrosion method ", utilize oxygen-eliminating device or
High-temperature water in feed-tank adds hot-air, and after water adds hot-air, temperature is the highest, then water higher for these temperature is sent
The heat absorption of heat smoke cooler heats up, and flue gas heat release is lowered the temperature, and owing to the water temperature in gas cooler is higher, is not result in outside cooler
Wall temperature less than acid dew point, it is to avoid the corrosion of heating surface；Such as patent documentation CN102705861A (2012.06.15) " a kind of combustion
Coal Industrial Boiler air preheating system ", it is respectively arranged heat exchanger at boiler back end ductwork and blower export, utilizes heat-transfer working medium
Water is delivered to the heat absorbed in flue in the air in air channel, it is achieved fume afterheat carrys out preheated air, due to water temperature and heat exchange
The strict control of wall surface temperature, is avoided that the generation of acid condensation；Such as patent documentation CN100402964C (2004.12.14) " heat pipe
Heat exchanger avoids the method for dew point corrosion and a kind of heat exchange of heat pipe ", have employed hot pipe technique, be made up of many independent heat pipes
Air preheater, has all right heat exchange property and antiseptic property.This type of technology is directed to waste heat recovery, and effect is obvious,
If air preheater to be replaced, solve such as low capacity boiler air preheater, tubular air preheater and have preferably
Antiseptic property, rotary regenerative air preheater solve Air Leakage etc., there is also the biggest gap.
Summary of the invention
The purpose of this utility model is to carry out for problem and shortage present in existing coal-burning boiler air preheat technology
Improve and innovation, it is provided that a kind of coal-burning boiler Combined air preheater, prevent air preheater corrosion and " caking property " from amassing
Ash, reduces exhaust gas temperature, improves boiler thermal output.
The technical solution of the utility model is as follows:
A kind of coal-burning boiler Combined air preheater, including steam-generating bank, cross over pipe, heat regulator, liquidometer, connection
Siphunculus group, temperature measuring equipment, controller, control valve group, feed pipe, first order air preheater, air bleeding valve；Described heat regulator
Being positioned at above steam-generating bank, first order air preheater is positioned at above heat regulator；The upper end of steam-generating bank by pipeline with
Heat regulator is connected, and heat regulator is connected by cross over pipe group with first order air preheater；Described steam-generating bank
It is located in flue；
Described steam-generating bank is made up of at least 2 group evaporation bank of tubes, and any one group of evaporation bank of tubes is by least 2 flue gas heat exchange tubes
Composition；The lower end of the flue gas heat exchange tube on any one group of evaporation bank of tubes is connected by lower header, and lower header is provided with even
Port, the connected entrance on two adjacent groups evaporation bank of tubes is connected by cross over pipe；Flue gas heat exchange on any one group of evaporation bank of tubes
The upper end of pipe is connected by upper header, and the upper surface of upper header is provided with steam drain, and steam drain is connected with heat regulator
Logical；
Described heat regulator includes drum and coil group, and the lower wall of drum is by pipeline and the steam discharge in steam-generating bank
Mouth is connected；Coil is mounted in drum, and coil group is at least provided with 2 coils, and the water inlet end of all coils is also
Being coupled on a water inlet collecting box pipe, water inlet collecting box pipe is connected with feed pipe；The water side of all coils is parallel to one and goes out
On water collecting box pipe, water outlet collecting box pipe is connected with outlet pipe；Pipeline is passed through between described water inlet collecting box pipe and water outlet collecting box pipe
Connecting has control valve group, control valve group to be made up of at least 2 control valves；Control valve group is electrically connected with the signal output of controller
End, the signal input part of controller is electrically connected with temperature measuring equipment, and temperature measuring equipment is arranged on drum；
At least 2 group air heat-exchange bank of tubes, any one group of air heat-exchange bank of tubes bag it is provided with in described first order air preheater
Including steam lower header, steam upper collecting chamber and at least 2 air heat-exchange pipes, all air on any one group of air heat-exchange bank of tubes change
The upper end of heat pipe is connected by steam upper collecting chamber, and the lower end of all air heat-exchange pipes on any one group of air heat-exchange bank of tubes leads to
Cross steam lower header to be connected；All steam lower headers are connected with drum by cross over pipe group；Described first order air preheat
Device is provided with exhaustor, and described air bleeding valve is located on described exhaustor；
The upper end of described liquidometer is connected with drum by pipeline, and the lower end of liquidometer is by pipeline and steam-generating bank
Connected entrance be connected.
Further, third level air preheater, the first air line, second level air preheater, the second air are also included
Pipeline, third level air preheater and second level air preheater are all located in flue, and second level air preheater is positioned at evaporation
Tube bank upstream, third level air preheater is located between steam-generating bank and second level air preheater；Second level air preheater
Air intlet end be connected with the air outlet slit end of first order air preheater by the second air line, second level air is pre-
The air outlet slit end of hot device is connected by the entrance point of the first air line with third level air preheater.
Further, in described first order air preheater, between adjacent 2 groups of air heat-exchange bank of tubes, be provided with dividing plate, all of every
Plate is crisscross arranged.
Combined air preheater principle: steam-generating bank is previously implanted saturation water, the water in steam-generating bank absorbs flue gas heat
Amount produces steam, after steam enters heat regulator, then enters first order air preheater along cross over pipe group, at first order air
Adding hot-air in preheater, steam release latent heat becomes condensed water, flows back to steam-generating bank by cross over pipe group, and air absorbs latent heat
Rear intensification；Air after intensification enters the second level air preheater heating of high temperature section, and temperature promotes further, enters back into the 3rd
Level air preheater continues heating, and temperature raises once again.The water yield that heat regulator is flowed through in coil by regulation regulates
Enter the quantity of steam of first order air preheater (particularly as follows: by being previously written program in controller, controller is receiving
After temperature measuring equipment transmits the temperature signal come, temperature signal is judged, thus controls the aperture of control valve group, to realize adjusting
Program), make in the caloric receptivity of cold air and coil the caloric receptivity of water equal to the latent heat of steam release, it is ensured that in steam-generating bank
The temperature (or heat exchanging pipe wall temperature) of saturation water is higher than acid dew point.
Compared with existing Air Preheater Technology, advantage of the present utility model:
(1) heating surface can avoid acid condensation, eliminates heated surface corrosion problem, and the heat exchanger tube occurred due to acid condensation
Breakage is leaked out and " caking property " dust stratification problem, reduces exhaust gas temperature；
(2) the safe operation coefficient of boiler auxiliaries air-introduced machine, aerator and steam generator system is greatly improved, maintenance work
Amount reduces.
(3) solve small scall coal-fired boiler and cannot use air preheater problem, increase substantially small scall coal-fired boiler
Efficiency.
Accompanying drawing explanation
Fig. 1 is the forward sight structural representation of system of the present utility model and device；
Fig. 2 is the schematic top plan view of first order air preheater structure；
Fig. 3 is the structural representation of any one group of evaporation bank of tubes.
Accompanying drawing illustrate: 1-steam-generating bank, 2-cross over pipe, 3-heat regulator, 4-liquidometer, 5-drum, 6-coil group,
7-communicating pipe group, 8-temperature measuring equipment, 9-controller, 10-control valve group, 11-feed pipe, 12-third level air preheater, 13-
First air line, 14-second level air preheater, 15-the second air line, 16-first order air preheater, 17-aerofluxus
Under valve, 101-flue gas heat exchange tube, 102-, header, the upper header of 103-, 104-steam drain, 105-connected entrance, 1601-air change
Heat pipe, 1602-steam lower header, 1603-steam upper collecting chamber, 1604-dividing plate
Detailed description of the invention
To low capacity low parameter boiler, below capacity 10t/h, pressure 0.98MPa, vapor (steam) temperature 183 DEG C, exhaust gas temperature
165 DEG C, without air preheater.After boiler operatiopn, actual exhaust gas temperature 175 DEG C～200 DEG C.Use this utility model coal-burning boiler
Air preheating system and the main air heating system of device composition and device are transformed, and exhaust gas temperature can drop to 140
Below DEG C.That is:
As it is shown in figure 1, a kind of coal-burning boiler Combined air preheater, including steam-generating bank 1, cross over pipe 2, heat regulation
Device 3, liquidometer 4, cross over pipe group 7, temperature measuring equipment 8, controller 9, control valve group 10, feed pipe 11, first order air preheater
16, air bleeding valve 17；Described heat regulator 3 is positioned at above steam-generating bank 1, and first order air preheater 16 is positioned at heat regulator
Above in the of 3；The upper end of steam-generating bank 1 is connected with heat regulator 3 by pipeline, heat regulator 3 and first order air preheat
Device 16 is connected by cross over pipe group 7；Described steam-generating bank 1 is located in flue；
As it is shown on figure 3, described steam-generating bank 1 is made up of at least 2 group evaporation bank of tubes, any one group of evaporation bank of tubes is by least 2
Root flue gas heat exchange tube 101 forms；The lower end of the flue gas heat exchange tube 101 on any one group of evaporation bank of tubes is by lower header 102 phase
Connection, lower header 102 is communicated with mouth 105, and the connected entrance 105 on two adjacent groups evaporation bank of tubes is connected by cross over pipe 2
Logical；The upper end of the flue gas heat exchange tube 101 on any one group of evaporation bank of tubes is connected by upper header 103, upper header 103
Upper surface is provided with steam drain 104, and steam drain 104 is connected with heat regulator 3；
Described heat regulator 3 includes drum 5 and coil group 6, and the lower wall of drum 5 is by pipeline and steam-generating bank 1
Steam drain 104 be connected；Coil group 6 is located in drum 5, and coil group 6 is at least provided with 2 coils, all snakelike
The water inlet end of pipe is parallel on a water inlet collecting box pipe, and water inlet collecting box pipe is connected with feed pipe 11；The water outlet of all coils
End is parallel on a water outlet collecting box pipe, and water outlet collecting box pipe is connected with outlet pipe；Described water inlet collecting box pipe and water outlet header
Being connected by pipeline between pipe has control valve group 10, control valve group 10 to be made up of at least 2 control valves；Control valve group 10 electrically connects
Connecing the signal output part of controller 9, the signal input part of controller 9 is electrically connected with temperature measuring equipment 8, and temperature measuring equipment 8 is arranged at vapour
On bag 5；
At least 2 group air heat-exchange bank of tubes, any one group of air heat-exchange bank of tubes it is provided with in described first order air preheater 16
Including steam lower header 1602, steam upper collecting chamber 1603 and at least 2 air heat-exchange pipes 1601, any one group of air heat-exchange bank of tubes
On the upper end of all air heat-exchange pipes 1601 be connected, on any one group of air heat-exchange bank of tubes by steam upper collecting chamber 1603
The lower end of all air heat-exchange pipes 1601 is connected by steam lower header 1602；All steam lower headers 1602 pass through cross over pipe
Group 7 is connected with drum 5, i.e. the quantity of the communicating pipe that communicating pipe group 7 is comprised is at least equal with the quantity of air heat-exchange bank of tubes；
Described first order air preheater 16 is provided with exhaustor, and described air bleeding valve 17 is located on described exhaustor；
The upper end of described liquidometer 4 is connected with drum 5 by pipeline, and pipeline and evaporation tube are passed through in the lower end of liquidometer 4
Connected entrance 105 on bundle 1 is connected.
When boiler capacity is more than 10t/h, also include third level air preheater the 12, first air line 13, the second level
Air preheater the 14, second air line 15, flue is all located at by third level air preheater 12 and second level air preheater 14
In, second level air preheater 14 is positioned at steam-generating bank 1 upstream, therefore, at the flue at second level air preheater 14 place
Temperature is higher relative to the temperature at the flue at steam-generating bank 1 place；Steam-generating bank 1 and is located at by third level air preheater 12
Between secondary air preheater 14；The air intlet end of second level air preheater 14 passes through second air line 15 and the first order
The air outlet slit end of air preheater 16 is connected, and the air outlet slit end of second level air preheater 14 passes through the first air line
13 are connected with the entrance point of third level air preheater 12.
As in figure 2 it is shown, be provided with dividing plate between adjacent 2 groups of air heat-exchange bank of tubes in described first order air preheater 16
1604, all of dividing plate is crisscross arranged, and the channel partition in first order air preheater 16 is become Z-shaped to lead to by the most each dividing plate 1604
Road, thus extends air flow time in first order air preheater 16, is beneficial to fully heat and utilize steam
Heat.
Combined air preheater work process is as follows:
After steam-generating bank 1 absorbs flue gas heat, produce steam and entered heat regulator 3 by steam drain 104, then, the most greatly
Some vapor is through communicating pipe group 7 entrance first order air preheater 16, and in first order air preheater 16, steam condenses,
Flowing back to steam-generating bank 1 under gravity, air heat absorption heats up, and the air after intensification sequentially enters second level air preheater
14, third level air preheater 12 continues heat temperature raising.
In order to safeguards system device is properly functioning, add water to steam-generating bank 1 before running liquid level that liquidometer 4 specifies, pot
After stove runs, air bleeding valve 17 standard-sized sheet, steam discharge certain time, and liquidometer 4 liquid level returns to design attitude, closes air bleeding valve 17.
In order to ensure that steam-generating bank 1 heat exchanging pipe wall temperature, higher than acid dew point, is measured temperature by the temperature measuring equipment 8 on drum 5
Degree, passes to controller 9 signal value, switchs the valve of control valve group 10 according to the program that controller 9 sets, regulation
Enter the boiler feed capacity in heat regulator 3 coil group 6.
Claims (3)
1. a coal-burning boiler Combined air preheater, it is characterised in that include steam-generating bank (1), cross over pipe (2), heat
Actuator (3), liquidometer (4), cross over pipe group (7), temperature measuring equipment (8), controller (9), control valve group (10), feed pipe
(11), first order air preheater (16), air bleeding valve (17)；Described heat regulator (3) is positioned at steam-generating bank (1) top, the
Main air preheater (16) is positioned at heat regulator (3) top；Pipeline and heat regulator are passed through in the upper end of steam-generating bank (1)
(3) being connected, heat regulator (3) is connected by cross over pipe group (7) with first order air preheater (16)；Described evaporation tube
Bundle (1) is located in flue；
Described steam-generating bank (1) is made up of at least 2 group evaporation bank of tubes, and any one group of evaporation bank of tubes is by least 2 flue gas heat exchange tubes
(101) composition；The lower end of the flue gas heat exchange tube (101) on any one group of evaporation bank of tubes is connected by lower header (102), under
Being communicated with mouth (105) on header (102), the connected entrance (105) on two adjacent groups evaporation bank of tubes is connected by cross over pipe (2)
Logical；The upper end of the flue gas heat exchange tube (101) on any one group of evaporation bank of tubes is connected by upper header (103), upper header
(103) upper surface is provided with steam drain (104), and steam drain (104) is connected with heat regulator (3)；
Described heat regulator (3) includes drum (5) and coil group (6), and the lower wall of drum (5) passes through pipeline and steam-generating bank
(1) steam drain (104) on is connected；Coil group (6) is located in drum (5), and coil group (6) is at least provided with 2 Serpentiss
Shape pipe, the water inlet end of all coils is parallel on a water inlet collecting box pipe, and water inlet collecting box pipe is connected with feed pipe (11)；Institute
The water side having coil is parallel on a water outlet collecting box pipe, and water outlet collecting box pipe is connected with outlet pipe；Described water inlet collection
Being connected by pipeline between case pipe and water outlet collecting box pipe and have control valve group (10), control valve group (10) is by least 2 control valve groups
Become；Control valve group (10) is electrically connected with the signal output part of controller (9), and the signal input part of controller (9) is electrically connected with to be surveyed
Temperature device (8), temperature measuring equipment (8) is arranged on drum (5)；
At least 2 group air heat-exchange bank of tubes, any one group of air heat-exchange bank of tubes bag it is provided with in described first order air preheater (16)
Include steam lower header (1602), steam upper collecting chamber (1603) and at least 2 air heat-exchange pipes (1601), any one group of air heat-exchange
The upper end of all air heat-exchange pipes (1601) on bank of tubes is connected by steam upper collecting chamber (1603), any one group of air heat-exchange
The lower end of all air heat-exchange pipes (1601) on bank of tubes is connected by steam lower header (1602)；All steam lower headers
(1602) it is connected with drum (5) by cross over pipe group (7)；Described first order air preheater (16) is provided with exhaustor, institute
State air bleeding valve (17) to be located on described exhaustor；
The upper end of described liquidometer (4) is connected with drum (5) by pipeline, and pipeline and evaporation are passed through in the lower end of liquidometer (4)
Connected entrance (105) in tube bank (1) is connected.
A kind of coal-burning boiler Combined air preheater the most according to claim 1, it is characterised in that also include the third level
Air preheater (12), the first air line (13), second level air preheater (14), the second air line (15), the third level
Air preheater (12) and second level air preheater (14) are all located in flue, and second level air preheater (14) is positioned at evaporation
Tube bank (1) upstream, third level air preheater (12) is located between steam-generating bank (1) and second level air preheater (14)；The
The air intlet end of secondary air preheater (14) is by the sky of the second air line (15) with first order air preheater (16)
The gas port of export is connected, and the air outlet slit end of second level air preheater (14) is empty with the third level by the first air line (13)
The entrance point of air preheater (12) is connected.
A kind of coal-burning boiler Combined air preheater the most according to claim 1 and 2, it is characterised in that described first
Being provided with dividing plate (1604) between adjacent 2 groups of air heat-exchange bank of tubes in level air preheater (16), all of dividing plate is crisscross arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620730132.4U CN205878220U (en) | 2016-07-12 | 2016-07-12 | Coal fired boiler combination formula air heater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620730132.4U CN205878220U (en) | 2016-07-12 | 2016-07-12 | Coal fired boiler combination formula air heater |
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| CN205878220U true CN205878220U (en) | 2017-01-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016343A (en) * | 2016-07-12 | 2016-10-12 | 江苏大学 | Combined air preheater of coal-fired boiler |
| CN109341395A (en) * | 2018-10-13 | 2019-02-15 | 兰州理工大学 | A kind of sulfur-containing smoke gas waste heat intelligence phase transformation recovery system |
-
2016
- 2016-07-12 CN CN201620730132.4U patent/CN205878220U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016343A (en) * | 2016-07-12 | 2016-10-12 | 江苏大学 | Combined air preheater of coal-fired boiler |
| CN109341395A (en) * | 2018-10-13 | 2019-02-15 | 兰州理工大学 | A kind of sulfur-containing smoke gas waste heat intelligence phase transformation recovery system |
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Granted publication date: 20170111 Effective date of abandoning: 20180810 |