CN206430185U - One kind bypass air preheater heat recovery system - Google Patents
One kind bypass air preheater heat recovery system Download PDFInfo
- Publication number
- CN206430185U CN206430185U CN201720013755.4U CN201720013755U CN206430185U CN 206430185 U CN206430185 U CN 206430185U CN 201720013755 U CN201720013755 U CN 201720013755U CN 206430185 U CN206430185 U CN 206430185U
- Authority
- CN
- China
- Prior art keywords
- air
- air preheater
- bypass
- cold
- recovery system
- 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.)
- Expired - Fee Related
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 29
- 239000000779 smoke Substances 0.000 claims abstract description 52
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000003546 flue gas Substances 0.000 claims abstract description 43
- 239000007789 gas Substances 0.000 claims abstract description 42
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 238000009529 body temperature measurement Methods 0.000 claims description 39
- 238000002156 mixing Methods 0.000 claims description 8
- 235000019504 cigarettes Nutrition 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000003517 fume Substances 0.000 abstract description 21
- 238000000034 method Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 239000003245 coal Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 2
- 244000046052 Phaseolus vulgaris Species 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 235000012149 noodles Nutrition 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Air Supply (AREA)
Abstract
Air preheater heat recovery system is bypassed the utility model discloses one kind；The utility model sets a set of bypass air preheater in general boiler back end ductwork air preheater part, constitute and be arranged in parallel with existing air preheater, according to the change of exhaust gas volumn and air preheater entrance flue gas temperature, adjust flue gas allocation proportion of the exhaust gas volumn by existing air preheater and bypass air preheater, abundant recovery boiler smoke heat energy, heat loss is reduced, boiler efficiency is improved.The utility model so that fume afterheat is fully used, can reduce flue gas heat loss, improve the economy of boiler according to the method for operation of the change automatic regulating system of service condition.
Description
Technical field
The utility model is related to a kind of bypass air preheater heat recovery system, is bypassed more particularly, to station boiler air preheater
Flue gas waste heat recovery system.
Background technology
The energy is the lifeblood of national economy, is the necessary material basis of socio-economic development.In recent years, countries in the world are especially
It is developed country, utilization ratio all using the raising energy, the saving energy are used as the strategic important goal of its energy development.State
Family proposes multinomial energy-saving and emission-reduction policy successively, and encouragement supervises the energy-saving and emission-reduction of whole society's every profession and trade to work, and power industry is used as energy
Source important component, carries out energy-saving significant.Station boiler flue gas loss is the major part of boiler losses, reduction
Exhaust gas temperature can significantly improve boiler efficiency, improve unit economy.
Therefore it is highly desirable to, to further reduction exhaust gas temperature, development of latent energy-saving potential, improve unit economy.Drop at present
The measure of low exhaust gas temperature mainly has：1st, increase boiler heating surface by boiler combustion adjustment and depth soot blowing to recept the caloric,
Reduce exhaust gas temperature；2nd, low-level (stack-gas) economizer is set after empty (gas) pre- (heat) device, introduces condensate, absorb fume afterheat, reduce
Draw gas, reduce exhaust gas temperature.
Utilization to residual heat from boiler fume, existing many design and practice both at home and abroad, using the type of flue gas heat-exchange unit
Formula, the heat in flue gas is replaced be used to other medium by heat exchanger.This flue gas heat-exchange unit is referred to as " low temperature province
The various titles such as coal device ", " low-pressure coal saver ", " gas cooler ", " cigarette water- to-water heat exchanger ", its essence is same or analogous,
Except that the position of flue gas heat-exchange unit arrangement is different with heat transferring medium.
(1) boiler tail is arranged in, using condensed water absorption fume afterheat.For example, certain domestic boiler of power plant exhaust gas temperature
It is higher, in order to reduce exhaust gas temperature, the performance driving economy of unit is improved, having installed low temperature additional in the outlet of boiler tail air preheater saves coal
Device, using condensed water absorption fume afterheat, is shown in accompanying drawing 1.
(2) it is arranged in before absorption tower, using condensed water absorption fume afterheat.German power plant Schwarze Pumpe power plant
2*800MW lignite generating sets have installed gas cooler additional between electrostatic precipitator and fume desulfurizing tower, are inhaled using condensate
Receive fume afterheat.Certain domestic power plant also arranges cigarette water- to-water heat exchanger in same position, sees accompanying drawing 2.
Notification number discloses a kind of residual heat from boiler fume for CN104896503A Chinese patent application and utilizes system, including
The main line being made up of the boiler furnace being sequentially connected, air preheater, cryogenic heat exchanger, feed-tank, wherein cryogenic heat exchanger is with giving
Vessel outlet formation loop, in addition to air preheater air intake branch road, the branch road one end connects on the air preheater, may be selected to sky
Pre- device air intake is heated or not heated；Also include reclaim motive heat distribution system, the system respectively with cryogenic heat exchanger, air preheater air intake
Branch road and feed-tank pipeline connection, can select, to the water heating in the heating of air preheater air intake or feed-tank, to reclaim heat distribution
System can adjust the condensing capacity after being heated of main line and each bye-pass, to control to heat air preheater according to actual needs
The heat use ratio of air intake or condensate.The system is, in the exhanst gas outlet position of existing air preheater, to increase by two feedwater and add
Hot device a, feed-water heater is arranged on after existing sky is expected before deduster, and another heater is arranged on existing sky
On the flue increased newly after pre- device, two-way flue gas converges before air-introduced machine, and fume afterheat is all absorbed by feedwater.But, return
The efficiency for receiving heat is low, and can not improve the efficiency of boiler.
Chinese patent CN204880080U discloses a kind of residual heat from boiler fume recovery system, including economizer, the pump housing,
One heat exchanger, the second heat exchanger, heat supply network water system and condensate system, the economizer, the heat exchange of the First Heat Exchanger are situated between
Matter side and the pump housing are sequentially communicated to form first circulation loop, the economizer, the heat transferring medium of second heat exchanger
Side and the pump housing are sequentially communicated to form second circulation loop, the first water side and the condensation water system of the First Heat Exchanger
System connection forms the first heat-exchanging loop, and the second water side and the hot net water system connectivity formation second of second heat exchanger are changed
Hot loop.The utility model realizes the independent heat exchange of hot net water and condensate, effectively prevent water quality interference, it is ensured that
Main frame condensate is not contaminated.Meanwhile, using heat transferring medium and the indirect heat exchange mode of boiler smoke heat exchange so that condensate
Do not contacted directly with economizer with hot net water, reduce economizer pouring, raw material cost of manufacture can be saved.The patent is
Using the heat that low-level (stack-gas) economizer feedwater absorbs after deduster, a part of heat-setting water a, part heats heat supply network hot water,
Utilize heat supply network hot water heat absorption reduction flue-gas temperature.
At present, there are 3 weak points in the method for station boiler reduction exhaust gas temperature：1st, blown by firing optimization and depth
Ash increase boiler heating surface heat absorption, it is smaller to reduction exhaust gas temperature amplitude, and can not continue to implement；2nd, absorbed heat and dropped by condensate
Low exhaust gas temperature, fume afterheat enters heat regenerative system low pressure condensate water part, squeezes extracted steam from turbine, and economy is not high；3rd, it is difficult
To adapt to persistently reduce the requirement of exhaust gas temperature during the change of the factors such as raw coal sulphur content, moisture and fouling of heating surface；4th, heat is reclaimed
The efficiency of amount is low, and can not additionally improve the efficiency of boiler.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of heat recovery system based on bypass air preheater and side
Method, can be according to the method for operation of the change Automatic Optimal regulating system of service condition, so that residual heat from boiler fume obtains abundant profit
With reduction flue gas loss realizes that boiler economics are maximized.
To reach above-mentioned purpose, the technical solution of the utility model is as follows：
Bypass air preheater heat recovery system of the present utility model, including：
One flue collector；
Be arranged on the main air preheater on the flue collector, the main air preheater respectively with a cold air channel, cold secondary air duct
It is connected, the flue gas into the flue collector passes through the main air preheater cold First air respectively with a cold air channel, described
The cold Secondary Air of cold secondary air duct carries out heat exchange, and so flue gas after cooling is discharged to boiler back end ductwork, and described cold one
Heat primary air, hot Secondary Air are respectively become after secondary wind, the cold Secondary Air are heated and is discharged to burning in boiler；
The one bypass exhaust gases passes separated from the flue collector, the part of smoke distributed from the flue collector enters institute
State bypass flue；
The bypass air preheater on the bypass exhaust gases passes is arranged on, the bypass air preheater is connected with cold secondary air duct,
So, the flue gas into the bypass air preheater and the cold wind progress heat exchange from the cold secondary air duct, after so cooling down
The flue gas be discharged to boiler back end ductwork, and the cold Secondary Air it is heated after respectively become hot Secondary Air and be discharged to boiler
In Secondary Air main pipe, for being burnt in stove.
The bypass air preheater heat recovery system, is provided with the bypass exhaust gases passes before flue gas enters bypass air preheater
One bypass smoke regulating valve；
Enter in the cold Secondary Air on the passage of bypass air preheater and a cold secondary air adjustor valve of bypass is set.
The bypass heat time wind stop valve is set on the bypass second heat air channel of the bypass air preheater air outlet slit.
The second smoke temperature measurement element is set on flue before the main air preheater entrance.
The main air preheater outlet rear pass sets the 9th smoke temperature measurement element before flue gas mixing point.
It is described that in bypass air preheater exhanst gas outlet flue, the 21st smoke temperature measurement element is set.
In main air preheater exhaust pass mixing point rear pass, the 23rd smoke temperature measurement element is set.
4th smoke temperature measurement element is set on a cold air channel.
7th smoke temperature measurement element is set on the cold secondary air duct.
In the heat primary air road, the 14th smoke temperature measurement element is set.
In the main hot secondary air duct, 17 smoke temperature measurement elements are set.
In the hot secondary air duct of bypass, the 20th smoke temperature measurement element is set.
The air of bypass air preheater can not only be drawn from cold secondary air duct, can also be drawn from a cold air channel, but only
It can select first, not compatible.
The utility model is another bypass air preheater in the parallel connection of existing air preheater, and low temperature cold is drawn at fan outlet
Wind, from air preheater before flue gas at draw high-temperature flue gas, by low-temperature cold wind and high-temperature flue gas in bypass air preheater in parallel
Exchanged heat, increase the heat exchange area in fume side, reduce exhaust gas temperature.And prior art is inhaled using feed-water heater
Fume afterheat is received, and the utility model is to bypass air preheater by parallel connection one, absorbs fume afterheat using cold wind, is entirely different
UTILIZATION OF VESIDUAL HEAT IN mode and system architecture, reached following significant technique effect：
(1) fume afterheat is absorbed using cold wind, waste heat, which is fully entered, participates in heat exchange, the heating efficiency of recovery in boiler
More than 90%, far above the general pre- heat utilization of feed-water heater.
(2) cold wind can select First air or Secondary Air, if the dry scarce capacity of dried bean noodles processed, can select First air, otherwise, select
Secondary Air, the characteristics of applicable boiler is different.
(3) can put into operation bypass air preheater in unit high load capacity, and bypass air preheater of being stopped transport in underload, be suitable for working as
The requirement of preceding unit significantly peak regulation.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 schematically shows an example of prior art；
Fig. 2 schematically shows another example of prior art；
Fig. 3 schematically shows the knot of the preferred embodiment of bypass air preheater heat recovery system of the present utility model
Structure.
Embodiment
In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are easy to understand, under
Face combines and is specifically illustrating, and the utility model is expanded on further.
As shown in Figure 3, the bypass air preheater heat recovery system that the utility model is provided includes：Main air preheater 3, bypass
Air preheater 10, air duct and exhaust gases passes.The air channel 5 of the air duct including cold First air, the air channel 6 of cold Secondary Air,
The air channel 15 of heat primary air, the air channel 15 of main hot Secondary Air, the air channel 19 of the hot Secondary Air of bypass.From the air channel 5 of cold First air, cold
The wind that the air channel 6 of Secondary Air enters main air preheater 3 is referred to as cold First air, cold Secondary Air；From main air preheater 3 or bypass air preheater 10
Out the wind into the air channel 15 of heat primary air, the air channel 16 of main hot Secondary Air, the air channel 19 of the hot Secondary Air of bypass is referred to as heat one
Secondary wind, main hot Secondary Air, the hot Secondary Air of bypass.
Exhaust gases passes are included before flue 1 before main air preheater entrance, main air preheater outlet rear pass 11, bypass air preheater entrance
Flue 12, bypass air preheater outlet rear pass 22.
Air duct and exhaust gases passes are connected with main air preheater 3 or bypass air preheater 10.
Flue 1 is connected to main air preheater 3 before main air preheater entrance, is connected with main air preheater outlet rear pass 11.It is cold once
Air channel 5, cold secondary road 6, heat primary air road 15, main hot secondary air duct (16) are connected with main air preheater (3), so cold First air
The heat exchange (heat exchange) in main air preheater 3 of road 5, the cold First air in cold secondary road 6 and cold Secondary Air and high-temperature flue gas.
Flue (bypass flue) 12 is connected to bypass air preheater 10 before air preheater entrance, with bypass air preheater outlet rear pass
22 connections, cold secondary air duct 6, the hot secondary road 18 of bypass are connected with bypass air preheater 10, so bypass the bypass in hot secondary road 18
Secondary Air exchanges heat with bypass flue gas in bypass air preheater 10.
The bypass air preheater heat recovery system that the utility model is provided also includes bypassing cold secondary air adjustor valve 8, bypass
Hot Secondary Air stop valve 18, bypass smoke regulating valve 13.
Cold secondary air adjustor valve 8 is bypassed to be arranged on the cold secondary air channel of cold Secondary Air entrance bypass air preheater 10；It is other
The hot Secondary Air stop valve 18 in road is arranged on the hot passage of Secondary Air 19 of bypass of the bypass air outlet slit of air preheater 10；Flue gas is bypassed to adjust
Section valve 13 is arranged on flue gas and entered on the bypass exhaust gases passes 12 before bypass air preheater 10.
Main hot secondary air duct 16 is connected with bypassing hot Secondary Air 19 by triplet type air duct joint, cigarette behind main air preheater outlet
Road 11 is connected with bypass air preheater outlet rear pass 22 by triplet type flue adapter.
Second smoke temperature measurement element 2 is set before the entrance of main air preheater 3 on flue 1, and main air preheater 3 exports rear pass
11 before flue gas mixing point set the 9th smoke temperature measurement element 9, bypass the exhanst gas outlet flue of air preheater 10 and with main sky
Pre- device exhaust pass mixing point rear pass sets smoke temperature measurement element 21,23, a cold air channel 5, cold secondary air duct respectively
6th, heat primary air road 15, main hot secondary air duct 16, bypass hot secondary air duct 19 set respectively the 4th smoke temperature measurement element 4,
7th smoke temperature measurement element 7, the 14th smoke temperature measurement element 14, the 17th smoke temperature measurement element 17, second
Ten smoke temperature measurement elements 20.
A cold air channel 5, cold secondary air duct 6 are respectively from primary air fan and pressure fan, a cold air channel 5 and cold Secondary Air
The flow in road 6 depends on boiler load and service condition, and heat primary air road 15 is connected with heat primary air road main pipe, goes to powder system processed
System, main hot secondary air duct 16, the hot secondary air duct 19 of bypass are connected after being mixed by air channel three-way piece with hot Secondary Air main pipe, and its is defeated
The wind gone out goes to secondary air box.
The method of work of the utility model system includes：
High-temperature flue gas before main air preheater entrance in flue 1 flows through main air preheater 3, at the same with a cold air channel 5, cold secondary
Air channel 6 flows through the cold First air of main air preheater 3, the heat exchange of cold Secondary Air；
High-temperature flue gas before the bypass entrance of air preheater 10 in flue 12 flows through bypass air preheater 10, with cold secondary air duct 6
Branch flows through the cold Secondary Air heat exchange of bypass air preheater 10 all the way；
The hot secondary air duct of bypass (19) for flowing through the main hot secondary air duct 16 of main air preheater 3 and flowing through bypass air preheater 10 is mixed
Enter boiler secondary air main pipe after conjunction, for being burnt in stove；
The flue gas for flowing through main air preheater 3 exports rear pass 11 through main air preheater 3 and flows through the flue gas warp of bypass air preheater 10
Bypass after air preheater outlet rear pass 22 is mixed and enter boiler back end ductwork；And
Second smoke temperature measurement element 2 is set before the main entrance of air preheater 3 on flue 1, and main air preheater exports rear pass 11
9th smoke temperature measurement element 9 is set before flue gas mixing point, the exhanst gas outlet flue of air preheater 10 is bypassed and pre- with main sky
The exhaust pass mixing point rear pass of device 3 sets the 21st smoke temperature measurement element 21, the 23rd measuring cell 23 respectively.
A cold air channel 5, cold secondary air duct 6, heat primary air road 15, main hot secondary air duct 16, the hot secondary air duct 19 of bypass are set respectively
4th smoke temperature measurement element 4, the 7th measuring cell 7, the 14th measuring cell 14, the 17th measuring cell 17,20 are surveyed
Measure element 20.
Bypass smoke regulating valve 13 controls it to open according to the measurement temperature of unit load, the 9th smoke temperature measurement element 9
Degree：When the measurement temperature of the 9th smoke temperature measurement element 9 is higher than the outlet temperature setting value of main air preheater 3, then flue gas is bypassed
The aperture of regulating valve 13 increases；Or, the temperature of the 9th smoke temperature measurement element 9 measurement is set less than the main outlet temperature of air preheater 3
Definite value, then reduce bypass smoke regulating valve 13 aperture.
Bypass cold secondary air adjustor valve 8 bypass smoke regulating valve 13 open after synchronously open, and according to main air preheater 3 after
The 9th smoke temperature measurement element 9, bypass air preheater 10 after the measurement temperature deviation of smoke temperature measurement element 21 control it
Aperture：If the measurement temperature of the 9th smoke temperature measurement element 9 after main air preheater 3 is more than the 20th after bypass air preheater 10
The measurement temperature of one smoke temperature measurement element 21, then bypass the cold aperture of secondary air adjustor valve 8 and reduce；Or, if main air preheater 3
The measurement temperature of the 9th smoke temperature measurement element 9 afterwards is less than the 21st smoke temperature measurement element after bypass air preheater 3
21 measurement temperature, then increase the aperture for bypassing cold secondary air adjustor valve 8.
Bypass hot Secondary Air stop valve 18 and its aperture is controlled according to the aperture for bypassing cold secondary air adjustor valve 8：It is cold when bypassing
The aperture of secondary air adjustor valve 8 is more than setting value, then bypasses hot Secondary Air stop valve 18 and keep full-gear；Or, work as bypass
The aperture of cold secondary air adjustor valve 8 is less than setting value, then bypasses hot Secondary Air stop valve 18 and be closed.
When RB or MFT occurs for unit, the aperture for bypassing cold secondary air adjustor valve 8 and bypass smoke regulating valve 13 synchronously subtracts
Small up to Close All, closing velocity depends on RB or MFT speed, after Close All, bypasses hot Secondary Air stop valve
18 are accordingly turned off.
In addition, the utility model can quote the amount of sulfur contenting in smoke monitored in real time or flue gas acid dew point measured value, automatic amendment
The initial set value such as air preheater exit gas temperature and the entering air temperature of main air preheater 3, with strengthen unit to use coal and
The adaptability of equipment operation condition.When amount of sulfur contenting in smoke or flue gas acid dew point measured value increase than initial set value, the deviation
By controlling computing to export each correction value, to increase the exit gas temperature of air preheater 3 and the entering air temperature of main air preheater 3 respectively
Each setting value, vice versa.
Pass through above description, it can be seen that the utility model is that another bypass is empty pre- in the parallel connection of existing air preheater
Device, at fan outlet draw low-temperature cold wind, from air preheater before flue gas at draw high-temperature flue gas, by low-temperature cold wind and high temperature
Flue gas is exchanged heat in bypass air preheater in parallel, increases the heat exchange area in fume side, reduces exhaust gas temperature.And existing skill
Art is mostly to absorb fume afterheat using feed-water heater, and the utility model is to bypass air preheater by parallel connection one, using cold
Wind absorbs fume afterheat, entirely different UTILIZATION OF VESIDUAL HEAT IN mode and system architecture, so as to reach following significant technique effect：
(1) fume afterheat is absorbed using cold wind, waste heat, which is fully entered, participates in heat exchange, the heating efficiency of recovery in boiler
More than 90%, far above the general pre- heat utilization of feed-water heater.
(2) cold wind can select First air or Secondary Air, if the dry scarce capacity of dried bean noodles processed, can select First air, otherwise, select
Secondary Air, the characteristics of applicable boiler is different.
(3) can put into operation bypass air preheater in unit high load capacity, and bypass air preheater of being stopped transport in underload, be suitable for working as
The requirement of the preceding big load peak regulation of unit.
(4) because suitable exhaust gas temperature is relevant with coal sulfur content, moisture, therefore, it can be adjusted according to the change of coal
The operational percentage of air preheater is bypassed, suitable exhaust gas temperature is adjusted, the requirement of coal is adapted to.
(5) exhaust gas temperature is reduced during high load capacity, boiler efficiency can be not only improved, air-introduced machine power consumption can be also reduced, with aobvious
The energy-saving effect of work.
General principle of the present utility model and principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the utility model spirit and scope are not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within the range of claimed the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.
Claims (14)
1. one kind bypass air preheater heat recovery system, it is characterised in that including：
One flue collector (1)；
Be arranged on the main air preheater (3) on the flue collector (1), the main air preheater (3) respectively with a cold air channel (5), cold
Secondary air duct (6) be connected, into the flue collector (1) flue gas by the main air preheater (3) respectively with the cold First air
The cold First air in road (5), the cold Secondary Air of the cold secondary air duct (6) carry out heat exchange, and the flue gas after so cooling down is discharged to
Boiler back end ductwork, and the cold First air, the cold Secondary Air it is heated after respectively become heat primary air, hot Secondary Air discharge
Burnt in boiler；
The one bypass exhaust gases passes (12) separated from the flue collector (1), the part of smoke distributed from the flue collector (1)
Into the bypass flue；And
It is arranged on the bypass air preheater (10) on the bypass exhaust gases passes (12), the bypass air preheater (10) and cold Secondary Air
Any of road (6) is connected, so, and the flue gas into the bypass air preheater (10) is with coming from the cold of the cold secondary air duct (6)
Wind carries out heat exchange, and the flue gas after so cooling down is discharged to boiler back end ductwork, and the cold Secondary Air it is heated after divide
Do not become hot Secondary Air and be discharged to boiler secondary air main pipe, for being burnt in stove.
2. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that the bypass air preheater heat is returned
Receipts system, provided with a bypass smoke regulating valve on the bypass exhaust gases passes (12) before flue gas enters bypass air preheater (10)
(13)。
3. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that enter other in the cold Secondary Air
One bypass cold secondary air adjustor valve (8) is set on the passage of road air preheater (10).
4. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that in bypass air preheater (10) air
The bypass hot Secondary Air stop valve (18) is set on the bypass secondary hot-air passage (19) of outlet.
5. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that before the entrance of main air preheater (3)
Second smoke temperature measurement element (2) is set on flue collector (1).
6. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that behind the outlet of main air preheater (3)
Flue (11) sets the 9th smoke temperature measurement element (9) before flue gas mixing point.
7. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that in the cigarette of bypass air preheater (10)
Gas exhaust pass sets the 21st smoke temperature measurement element (21).
8. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that the outlet in main air preheater (3)
Flue mixing point rear pass sets the 23rd smoke temperature measurement element (23).
9. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that set on a cold air channel (5)
Put the 4th smoke temperature measurement element (4).
10. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that set on cold secondary air duct (6)
Put the 7th smoke temperature measurement element (7).
11. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that set in heat primary air road (15)
Put the 14th smoke temperature measurement element (14).
12. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that in main hot secondary air duct (16)
17 smoke temperature measurement elements (17) are set.
13. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that bypassing hot secondary air channel
(19) the 20th smoke temperature measurement element (20) is set.
14. air preheater heat recovery system is bypassed as claimed in claim 1, it is characterised in that the sky of bypass air preheater (10)
Gas can not only be drawn from cold secondary air duct (6), can also be drawn from a cold air channel (5), but can only select first, can not be simultaneous
Hold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720013755.4U CN206430185U (en) | 2017-01-06 | 2017-01-06 | One kind bypass air preheater heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720013755.4U CN206430185U (en) | 2017-01-06 | 2017-01-06 | One kind bypass air preheater heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206430185U true CN206430185U (en) | 2017-08-22 |
Family
ID=59585008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720013755.4U Expired - Fee Related CN206430185U (en) | 2017-01-06 | 2017-01-06 | One kind bypass air preheater heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206430185U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500127A (en) * | 2017-01-06 | 2017-03-15 | 上海明华电力技术工程有限公司 | A kind of bypass air preheater heat recovery system and method |
| CN112555881A (en) * | 2020-10-27 | 2021-03-26 | 中冶南方都市环保工程技术股份有限公司 | Gas boiler air gas parallel connection integrated smoke temperature reduction energy-saving device |
-
2017
- 2017-01-06 CN CN201720013755.4U patent/CN206430185U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500127A (en) * | 2017-01-06 | 2017-03-15 | 上海明华电力技术工程有限公司 | A kind of bypass air preheater heat recovery system and method |
| CN112555881A (en) * | 2020-10-27 | 2021-03-26 | 中冶南方都市环保工程技术股份有限公司 | Gas boiler air gas parallel connection integrated smoke temperature reduction energy-saving device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106090880B (en) | A kind of machine stove set heat circulation afterheat recycling system | |
| CN102252339B (en) | System for reducing discharge smoke temperature of power station boiler | |
| CN106500127A (en) | A kind of bypass air preheater heat recovery system and method | |
| CN204693472U (en) | A kind of air preheat and smoke waste heat utilization system | |
| CN105180146B (en) | A kind of cogeneration power plant fume afterheat is multistage to reclaim utilization system | |
| CN107366897B (en) | A kind of Pollutant in Coal Burning Boiler emission reduction optimization collaboration fume afterheat deep exploitation system | |
| CN109681898A (en) | Phase transformation heat pipe-type power plant's First air heats thermoregulating system | |
| CN106402838A (en) | Tail flue gas waste heat utilizing system of utility boiler based on hot blast recycling | |
| CN105135468B (en) | Smoke waste heat utilization system | |
| CN206430185U (en) | One kind bypass air preheater heat recovery system | |
| CN106895390A (en) | A kind of station boiler multi-element heterogeneous afterheat utilizing system | |
| CN204987074U (en) | Synthesize backheat and waste heat utilization's adjustable boiler preheating of air system | |
| CN206682921U (en) | A kind of station boiler multi-element heterogeneous afterheat utilizing system | |
| CN103115377B (en) | A kind of sub-control phase transformation air preheating system and air preheat method | |
| CN110553245A (en) | System for improving wide-load operation thermal efficiency of coal-fired unit | |
| CN209588020U (en) | Station boiler cold air heating and smoke waste heat comprehensive utilization system | |
| CN209706109U (en) | Phase transformation heat pipe-type power plant's First air heats thermoregulating system | |
| CN107023847A (en) | A kind of flue gas and afterheat of slags, which are combined, utilizes system | |
| CN106765245A (en) | A kind of smoke waste heat utilization system | |
| CN208253553U (en) | A kind of system improving the wide load operation thermal efficiency of coal unit | |
| CN104832908B (en) | A kind of association system of phase-change heat-exchanger with heat exchangers for district heating and integrated processes | |
| CN206958888U (en) | A kind of clinker and heat primary air are residual heat combined to utilize system | |
| CN206330139U (en) | A kind of smoke waste heat utilization system | |
| CN205316371U (en) | Combine waste heat utilization's powder process to transfer wind system all | |
| CN105485707B (en) | A kind of powder processed of combination UTILIZATION OF VESIDUAL HEAT IN adjusts wind system and powder processed to adjust wind method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170822 |