CN206330139U - A kind of smoke waste heat utilization system - Google Patents
A kind of smoke waste heat utilization system Download PDFInfo
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- CN206330139U CN206330139U CN201621490447.2U CN201621490447U CN206330139U CN 206330139 U CN206330139 U CN 206330139U CN 201621490447 U CN201621490447 U CN 201621490447U CN 206330139 U CN206330139 U CN 206330139U
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- heat
- air
- flue gas
- temperature
- exchanger rig
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- 239000000779 smoke Substances 0.000 title claims abstract description 46
- 239000002918 waste heat Substances 0.000 title claims abstract description 28
- 239000003546 flue gas Substances 0.000 claims abstract description 139
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 138
- 239000007789 gas Substances 0.000 claims abstract description 44
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 7
- 230000023556 desulfurization Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 238000010438 heat treatment Methods 0.000 claims description 29
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- 230000001105 regulatory effect Effects 0.000 claims description 21
- 238000000605 extraction Methods 0.000 claims description 16
- 238000009833 condensation Methods 0.000 claims description 9
- 230000005494 condensation Effects 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000003517 fume Substances 0.000 abstract description 13
- 235000019504 cigarettes Nutrition 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 230000007717 exclusion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical group S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Air Supply (AREA)
- Chimneys And Flues (AREA)
Abstract
The utility model discloses a kind of smoke waste heat utilization system, including the high-temperature flue gas cooler being connected with air preheater, high-temperature flue gas cooler is sequentially connected deduster, low-temperature flue gas cooler and desulfurization reactor；The heat medium passage of high-temperature flue gas cooler and the heat medium passage of low-temperature flue gas cooler are connected with the heat medium passage of heat-exchanger rig, and the heat medium passage of heat-exchanger rig is used to heat the air for sending into air preheater；Being provided between the smoke inlet and Benitration reactor exhanst gas outlet of air preheater is used for the air high temperature heater (HTH) to flue gas cool-down, the air outlet slit connection air high temperature heater (HTH) of air preheater.Said system drastically increases the utilization ratio of residual heat from boiler fume, by adjusting air preheater exit gas temperature, improve the safety in operation of air preheater, the flue-gas temperature of boiler at low load stage denitration reactor inlet can be improved again simultaneously, the load scope of application of denitrating system has been widened.
Description
Technical field
The utility model is related to heat recovery technical field, more particularly to a kind of smoke waste heat utilization system.
Background technology
The design flue-gas temperature of the rotary regenerative air preheater outlet used in Large-sized Coal-fired Power group is in 125 DEG C or so, summer
Actual exit gas temperature can exceed that 140 DEG C during season high load capacity, cause substantial amounts of fume afterheat to lose；And during winter underload
Exit gas temperature may be less than 100 DEG C, and this is by the sulfate provided with SCR denitration device unit air preheater cold-end air is aggravated
To the deposition of sulfuric acid droplets, so as to cause cold through-flow blocking, component corrosion, the safety and economic operation of unit is influenceed.In addition, unit
Underload (general minimum can only be up to 40% load) operation will also cause the SCR denitration device entrance flue gas temperature can not to meet technique
It is required that, so that denitrification apparatus is out of service, this is clearly unfavorable for the environment protection control of power plant.
At this stage, the heat that air preheater exiting flue gas is reclaimed mainly is reclaimed by steam turbine low pressure heat regenerative system,
Such a recovery can play certain energy-saving effect by way of squeezing steam turbine and drawing gas, but this mode is to above-mentioned waste heat
Utilization ratio is not high, wastes substantial amounts of residual heat resources, and denitrification apparatus is out of service when can not avoid above-mentioned underload.
Therefore, how to provide a kind of utilization ratio high smoke waste heat utilization system, be that those skilled in the art need at present
The technical problem to be solved.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of smoke waste heat utilization system, in the process of running to cigarette
The utilization ratio of gas waste heat is higher.
To achieve these goals, the utility model provides following technical scheme：
A kind of smoke waste heat utilization system, including the high-temperature flue gas cooler being connected with air preheater, the high temperature cigarette
Gas Cooler is sequentially connected deduster, low-temperature flue gas cooler and desulfurization reactor；The heating agent of the high-temperature flue gas cooler leads to
The heat medium passage of road and the low-temperature flue gas cooler is connected with the heat medium passage of heat-exchanger rig, the heat of the heat-exchanger rig
Matchmaker's passage is used to heat the air for sending into the air preheater；
Being provided between the smoke inlet and Benitration reactor exhanst gas outlet of the air preheater is used for flue gas cool-down
Air high temperature heater (HTH), the air outlet slit of the air preheater connects the air high temperature heater (HTH).
Preferably, the heat-exchanger rig includes primary air heat-exchanger rig and auxiliary air heat-exchanger rig；
The air high temperature heater (HTH) includes：
Primary air high temperature heater (HTH), for passing sequentially through the primary air heat-exchanger rig and the air preheater
Air carry out flue gas heat exchange, to improve primary air temperature；
The auxiliary air high temperature heater (HTH) in parallel with the primary air high temperature heater (HTH), for passing sequentially through described two
Air after secondary air heat-exchanging device and the air preheater carries out flue gas heat exchange, to improve estimated secondary air temperature；
Feed water preheater is in parallel with the primary air high temperature heater (HTH), the heat medium passage of the feed water preheater, setting
It is connected in the heat medium passage of the economizer of the Benitration reactor flue gas upstream with feedwater high temperature heater (HTH), current are sequentially passed through
The feedwater high temperature heater (HTH), the feed water preheater and the economizer.
Preferably, the primary air high temperature heater (HTH), the auxiliary air high temperature heater (HTH) and the feed water preheater
Flue gas be passed through mouth and be equipped with smoke controllable register.
Preferably, the heat medium passage of the high-temperature flue gas cooler, the heat medium passage of the low-temperature flue gas cooler and institute
State heat-exchanger rig to be connected in series, the outlet of the heat medium passage of the low-temperature flue gas cooler and the heat of the high-temperature flue gas cooler
The import connection of matchmaker's passage.
Preferably, the heat-exchanger rig includes：
Primary air heat-exchanger rig and auxiliary air heat-exchanger rig, the two is arranged in parallel；
Enter the temperature regulating device of primary air heat-exchanger rig, the heat medium temperature of auxiliary air heat-exchanger rig, bag for adjusting
The first flow regulating valve being connected in parallel and condensation water heater are included, the temperature regulating device is located at the high-temperature flue gas cooler
Heating agent is exported.
Preferably, the high pressure extraction pipeline of the feedwater high temperature heater (HTH) is provided with takes out for adjusting feed temperature, high pressure
The high pressure extraction regulating valve of vapour vapour amount.
Preferably, the branch road of the heat-exchanger rig, which is provided with, is used for the flow of the thermal medium to entering the heat-exchanger rig
The flow control valve being controlled.
Preferably, the high-temperature flue gas cooler, the low-temperature flue gas cooler are adverse current with the heat-exchanger rig and changed
Hot device.
Flue gas stream of the smoke waste heat utilization system provided by the utility model in air preheater, deduster and devulcanizer
Air high temperature heater (HTH), high-temperature flue gas cooler and low-temperature flue gas cooler are set respectively on road all, can be first by high temperature cigarette
Gas Cooler cools to the flue gas for entering deduster, the temperature is met the appropriate working temperature of deduster, and low temperature cigarette
Gas Cooler can again be cooled to the flue gas flowed out in deduster, to meet desulfurizer in suitable operating temperature,
So as to improve dedusting, desulfuration efficiency and the utilization rate of waste heat in flue.
High-temperature flue gas cooler and the fume afterheat obtained in low-temperature flue gas cooler by heat exchange, can pass through heat exchange
Device transmits the air for being fed into air preheater, so that fume afterheat is reclaimed into pot by sending into the air of air preheater
Stove therrmodynamic system, drastically increases the utilization ratio of residual heat from boiler fume, serves good energy-saving effect.
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 to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing of offer.
Fig. 1 is a kind of system construction drawing of smoke waste heat utilization system provided by the utility model.
In figure 1 above：
1- low-temperature flue gas cooler, 2- air-introduced machines, 3- high pressure extractions regulating valve, 4- feedwater high temperature heater (HTH), 5- feedwater are pre-
Hot device, 6- feed water preheater smoke controllable register, 7- auxiliary airs high temperature heater (HTH), the second smoke of 8- controllable register, 9- first
Smoke controllable register, 10- primary air high temperature heater (HTH)s；
11- first flows regulating valve, 17- second flows regulating valve, the flow control valves of 21- the 3rd, the Flow-rate adjustments of 23- the 4th
Valve, the flow control valves of 26- the 5th；
12- high-temperature flue gas cooler, 13- condensation water heaters, 14- economizers, 15- auxiliary airs bypass controllable register,
16- primary airs bypass controllable register, 18- auxiliary airs heat-exchanger rig, 19- primary airs heat-exchanger rig, 20- auxiliary air wind
Machine, 22- primary airs blower fan, 24- heating agents return valve, 25- heat medium pumps.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Core of the present utility model is to provide a kind of smoke waste heat utilization system, in the process of running to the profit of fume afterheat
It is higher with efficiency and applied widely.
Fig. 1 is refer to, Fig. 1 is a kind of system construction drawing of smoke waste heat utilization system provided by the utility model.
A kind of smoke waste heat utilization system provided by the utility model, including the high-temperature flue gas being connected with air preheater
Connection deduster, low-temperature flue gas cooler 1, desulfurization are set gradually on cooler 12, the flue gas flow direction of high-temperature flue gas cooler 12
Reactor, above-mentioned functions equipment is sequentially connected in the circulation of flue gas.The heat medium passage and low temperature cigarette of high-temperature flue gas cooler 12
The heat medium passage of Gas Cooler 1 is connected with the heat medium passage of heat-exchanger rig, and the heat medium passage of heat-exchanger rig is used for feeding
The air of air preheater is heated.Being provided between the smoke inlet and Benitration reactor exhanst gas outlet of air preheater is used for
To the air high temperature heater (HTH) of flue gas cool-down, the air outlet slit connection air high temperature heater (HTH) of air preheater, so as to air with
Flue gas heat exchange in air high temperature heater (HTH).
It should be noted that the heat medium passage of heat-exchanger rig is used for hot gas, the gas is sent into air preheater
For flue gas cool-down effect to be exchanged heat, realized with flue gas.
It should be noted that " heat medium passage " alleged in text refers in high-temperature flue gas cooler 12, low-temperature flue gas cooling
The inside of device 1 or other heat-exchanger rigs, the space circulated for thermal medium for example, pipe heat exchanger can be selected, then should
" heat medium passage " of pipe heat exchanger is the tubular space that thermal medium circulates.Flue gas flows out from air preheater, sequentially enters
In the devices such as high-temperature flue gas cooler 12, deduster, low-temperature flue gas cooler 1 and devulcanizer, and in high-temperature flue gas cooler
12 with low-temperature flue gas cooler 1 in, flue gas can with thermal medium carry out heat exchange, flue gas cool-down, heating agent heating, thermal medium mass flow
Heat exchange can be carried out again by entering in heat-exchanger rig, the fume afterheat that thermal medium is obtained, which is passed to, will send into air preheater
Air, realize and flue gas waste heat recovery entered to the purpose of boiler thermodynamic system, drastically increase the utilization of residual heat from boiler fume
Efficiency, serves more preferable energy-saving effect.
Fig. 1 is refer to, air high temperature heater (HTH) is the heat exchange of the exhaust gases passes between Benitration reactor and air heat exchanger
Equipment, for the flue gas of air inlet preheater cools.
Flue gas stream of the smoke waste heat utilization system provided by the utility model in air preheater, deduster and devulcanizer
Air high temperature heater (HTH), high-temperature flue gas cooler 12 and low-temperature flue gas cooler 1 are set respectively on road all, can be first by high temperature
12 pairs of flue gases for entering deduster of gas cooler cool, and the temperature is met the appropriate working temperature of deduster, and low
Warm gas cooler 1 can again be cooled to the flue gas flowed out in deduster, to meet desulfurizer in suitable work
Temperature, so as to improve the dedusting in flue, desulfuration efficiency and fume afterheat utilization ratio.
High-temperature flue gas cooler 12 and the fume afterheat obtained in low-temperature flue gas cooler 1 by heat exchange, can pass through
Heat-exchanger rig transmits the air for being fed into air preheater, so that fume afterheat be reclaimed by sending into the air of air preheater
Enter boiler thermodynamic system, drastically increase the utilization ratio of residual heat from boiler fume, serve good energy-saving effect.
Optionally, for using heat-pipe heat exchanger to the heat-exchanger rig that the air for sending into air preheater is heated,
Exchange capability of heat is good, size can be smaller.Due to selection exchange capability of heat and the density thermal medium bigger than flue gas, so the device
Size can further be reduced.In addition, air and selected hot coal medium are without obvious corrosivity, therefore it can reduce pair
The corrosion of heat pipe in hyperphoric device, extends the life-span of heat-exchanger rig.
The exhaust gas temperature of air preheater outlet is improved when the utility model can run boiler at low load, so as to have
Effect alleviates the low-temperature corrosion of air preheater and stifled ash.
On the basis of any one embodiment, the heat medium passage of high-temperature flue gas cooler 12, low-temperature flue gas cooler 1
Heat medium passage and heat-exchanger rig be connected in series, the outlet of the heat medium passage of low-temperature flue gas cooler 1 and high-temperature flue gas cooler
The import connection of 12 heat medium passage.
It should be noted that there is heating agent in the loop of above-mentioned high-temperature flue gas cooler 12, low-temperature flue gas cooler 1 composition
Input port and heating agent delivery outlet, heating agent input port are arranged on the nearer position of the entrance of distance low-temperature gas cooler 1.
Thermal medium initially enters the heat medium passage of low-temperature flue gas cooler 1, and recovered flue gas is cold in low-temperature flue gas cooler 1
Liberated heat when but；Then, the thermal medium after the above-mentioned heating through low-temperature flue gas cooler 1 enters high-temperature flue gas cooler 12
Heat medium passage in, liberated heat when further recovered flue gas is cooled down in high-temperature flue gas cooler 2.Afterwards, above-mentioned heating agent
Medium enters back into heat-exchanger rig, and the heat transfer of acquisition will be sent into the air of air preheater.
It should be noted that above-mentioned high-temperature flue gas cooler 12 can be using identical warm with low-temperature flue gas cooler 1
Matchmaker's pipe heat exchanger or other there is the device of identical function, i.e., above-mentioned " high temperature " and " low temperature " is referred to by the cigarette
The flue-gas temperature of Gas Cooler just, and is not the property of gas cooler in itself.When the heating agent of high-temperature flue gas cooler 12
When the heat medium passage of passage and low-temperature flue gas cooler 1 is cascaded, thermal medium is set first to flow through low-temperature flue gas cooler 1,
High-temperature flue gas cooler 12 is passed through, can realize that the utilization ratio of fume afterheat is maximized.
On the basis of above-described embodiment, heat-exchanger rig can specifically include：Temperature regulating device, primary air heat-exchanger rig
19 and auxiliary air heat-exchanger rig 18, primary air heat-exchanger rig 19 and auxiliary air heat-exchanger rig 18 are arranged in parallel, temperature control dress
The heat medium temperature for entering primary air heat-exchanger rig 19, auxiliary air heat-exchanger rig 18 for adjusting is put, temperature regulating device is located at height
The heating agent outlet of warm gas cooler 12, and be connected with heat-exchanger rig.Temperature regulating device includes the first flow regulation being connected in parallel
Valve 11 and condensation water heater 13.The heating agent amount for controlling to enter in condensation water heater 13 by first flow regulating valve 11, or
The condensing capacity that person is entered in condensation water heater 13 by other Flux Valve Controls, so that it is empty to realize that regulation enters once
The temperature of the heating agent of gas heat-exchanger rig 19 and auxiliary air heat-exchanger rig 18.
On the basis of any one above-mentioned embodiment, heat-exchanger rig includes primary air heat-exchanger rig 19 and secondary sky
Gas heat-exchanger rig 18, above-mentioned air high temperature heater (HTH) includes：Primary air high temperature heater (HTH) 10 and auxiliary air high temperature heater (HTH)
7。
Primary air high temperature heater (HTH) 10 is used for the sky to passing sequentially through primary air heat-exchanger rig 19 and air preheater
Gas carries out flue gas heat exchange, to make flue gas cool-down, and improves primary air temperature.
Auxiliary air high temperature heater (HTH) 7 is in parallel with primary air high temperature heater (HTH), for changing passing sequentially through auxiliary air
The air of thermal 18 and air preheater carries out flue gas heat exchange, to make flue gas cool-down, so as to improve auxiliary air temperature
Degree.
Feed water preheater 5 is arranged in parallel with primary air high temperature heater (HTH) 10, the heat medium passage of feed water preheater 5, setting
It is connected in the heat medium passage of the economizer 14 of Benitration reactor flue gas upstream with feedwater high temperature heater (HTH) 4, current are sequentially passed through
Feed water high temperature heater (HTH) 4, feed water preheater 5 and economizer 14.
It should be noted that the primary air on the heat medium passage connection air preheater of primary air high temperature heater (HTH) 10
Outlet, primary air outlet is connected with primary air entrance, primary air entrance connection primary air heat-exchanger rig 19；It is corresponding
, the secondary air outlet on the heat medium passage of auxiliary air high temperature heater (HTH) 7 connection air preheater, secondary air outlet and two
Secondary air intake connection, auxiliary air entrance connecting secondary air heat-exchanging device 18.Or, flue gas can be set in pipe, it is empty
Gas is outside pipe.
It should be noted that primary air high temperature heater (HTH) 10, the outlet of the heat medium passage of auxiliary air high temperature heater (HTH) 7
The burner hearth of boiler can be directly connected to, the air intake of heat-exchanger rig either directly can also be in communication with the outside or connect, or
Exhaust gases passes before person's connection air high temperature heater (HTH).
In the present embodiment, air high temperature heater (HTH) includes two heaters corresponding with heat-exchanger rig respectively, so as to realize
Exchange the utilization of the hollow gas of thermal.
Optionally, the flue gas of primary air high temperature heater (HTH) 10, auxiliary air high temperature heater (HTH) 7 and feed water preheater 5 leads to
Entrance is equipped with smoke controllable register.
On the basis of any one above-mentioned embodiment, heat-exchanger rig connection air blower, air blower is pre- with air
Bypass air channel is connected between hot device, bypass is provided with air bypass controllable register on air channel.Optionally, air blower includes one
Secondary air blower 22 and auxiliary air blower fan 20, air bypass air channel controllable register include auxiliary air and bypass the He of controllable register 15
Primary air bypasses controllable register 16, is heated respectively to flowing through two heat-exchanger rigs, air preheater and two high temperature airs
The air of device is controlled, can as flue-gas temperature and air temperature modification a measure.
Optionally, above-mentioned heat-exchanger rig can also include the air heat-exchanging device of tertiary air heat-exchanger rig or more.
On the basis of any one above-mentioned embodiment, along cigarette between the system flue gas source and air preheater in Fig. 1
Flow of air direction is sequentially provided with economizer 14, Benitration reactor, feed water preheater 5, refer to Fig. 1, feed water preheater 5 and province's coal
The heat medium passage of device 14 is connected with feedwater high temperature heater (HTH) 4, and current sequentially pass through feedwater high temperature heater (HTH) 4, feed water preheater 5
With economizer 14.
In the present embodiment, feed water preheater 5, the heat of feed water preheater 5 are set in the exhanst gas outlet position of Benitration reactor
Matchmaker carrys out self-water-supply high temperature heater (HTH) 4, and the high pressure extraction pipeline of the feedwater import of high temperature heater (HTH) 4 is provided with high pressure extraction regulating valve 3,
On the one hand the aperture for adjusting 3 by high pressure extraction can adjust the feed temperature that feedwater high temperature heater (HTH) 4 is exported, on the other hand
The vapour amount of high pressure extraction can be adjusted.Feedwater enters economizer after sequentially passing through feedwater high temperature heater (HTH) 4, feed water preheater 5
14, so that feedwater is exchanged heat with flue gas.
Optionally, the high pressure extraction pipeline of feedwater high temperature heater (HTH) 4, which is provided with, is used to adjust feed temperature, high pressure extraction vapour
The high pressure extraction regulating valve 3 of amount.
Optionally, in any one above-mentioned embodiment, in heat exchange structures such as above-mentioned heat-exchanger rig, air high-temperature heating equipments
In each branch road in, can set control flow control valve, so that the amount of heat exchanging heating agent is controlled, so as to realize
Control to flue-gas temperature.
Optionally, the branch road of heat-exchanger rig, which is provided with, is used to be controlled the flow of the thermal medium into heat-exchanger rig
Flow control valve.For example, the second flow regulating valve 17 being arranged on the heat medium passage of primary air heat-exchanger rig 19, or
It is arranged on the 3rd flow control valve 21 on the heat medium passage of auxiliary air heat-exchanger rig 18.
Optionally, flow control valve also includes being connected in parallel on high-temperature flue gas cooler 12 and the 4th flow tune on temperature regulating device
Valve 23 is saved, the 4th flow control valve 23 has been connected in series low-temperature flue gas cooler 1 and primary air heat-exchanger rig 19.
Optionally, flow control valve also includes being arranged on the path that heat-exchanger rig is connected with low-temperature flue gas cooler 1, and
It is connected to the heating agent entrance of low-temperature flue gas cooler 1 and the 5th flow control valve 26 of heating agent outlet.
On the basis of any one above-mentioned embodiment, low-temperature flue gas cooler 1 or high-temperature flue gas cooler 12
Think that Teflon heating agent pipe heat exchanger or fiberglass heat matchmaker's pipe heat exchanger.
Optionally, high-temperature flue gas cooler 12, low-temperature flue gas cooler 1 are contra-flow heat exchanger with heat-exchanger rig.
Optionally, feed water preheater smoke controllable register 6 can be set at the smoke inlet end of feed water preheater 5, so as to
Exhaust gas volumn is adjusted, and then adjusts economizer entrance feed temperature, so as to control the temperature of flue gas.
Optionally, it can divide in the smoke inlet section of primary air high temperature heater (HTH) 10 and auxiliary air high temperature heater (HTH) 7
The first smoke controllable register 9 and the second smoke controllable register 8 are not correspondingly arranged, to adjust exhaust gas volumn, to control to enter sky
The temperature of the flue gas of air preheater, so as to adjust the flue-gas temperature of the equipment such as air preheater outlet.
Optionally, flowed in the heating agent outlet of heat-exchanger rig in the path of low-temperature flue gas cooling device, be additionally provided with heating agent
Return valve 24, to be controlled to heating agent capacity of returns.
It should be noted that the heating agent that above-mentioned heat-exchanger rig is connected with high-temperature flue gas cooler 12, low-temperature flue gas cooler 1
, it is necessary to set heat medium pump 25 so as to the circulation of heating agent in path.
In smoke waste heat utilization system provided by the utility model, flue gas first passes through economizer 14 and carries out heat release, then
Into Benitration reactor.Feed water preheater 5, auxiliary air high temperature heater (HTH) 7, primary air high temperature heater (HTH) 10 can be in boiler lists
It is arranged in juxtaposition in the flue of side, by adjusting preheater smoke controllable register 6, the second smoke controllable register 8, the first smoke regulation gear
Plate 9 can adjust the exhaust gas volumn that each passes through, and then control the heat exchange amount of each passage, can also adjust feed water preheater 5 and go out
What the estimated secondary air temperature and primary air high temperature heater (HTH) 10 that mouth feed temperature, auxiliary air high temperature heater (HTH) 7 are exported were exported
Primary air temperature.Flue gas flow through after flue arranged side by side air inlet preheater can heat release to about 120 DEG C, enter back into high temperature cigarette
Heat release is to about 90 DEG C in Gas Cooler 12, then enters back into low-temperature flue gas cooler 1 heat release extremely by deduster, air-introduced machine 2
About 65 DEG C, so as to realize the temperature for the flue gas that regulation is entered in desulfurization reactor.
Wherein thermal medium pipeline is provided with thermal medium injection channel and thermal medium drain passage, passes through regulation the 5th
Flow control valve 26 can adjust the flue-gas temperature of the outlet of low-temperature flue gas cooler 1, can by adjusting the 4th flow control valve 23
To adjust the flue-gas temperature of the outlet of high-temperature flue gas cooler 12, by adjusting the flow control valve of second flow regulating valve 17 and the 3rd
21, then it can adjust the heat exchange amount distribution between auxiliary air heat-exchanger rig 18 and auxiliary air heat-exchanger rig 19.This is recycled back to
When there is unnecessary heat to be recovered to by condensation water heater 13 among condensate in road, controlled by first flow regulating valve 11
Into the heating agent amount among condensation water heater 13, or the condensing capacity that control enters in condensation water heater 13, it can adjust
Save temperature of the thermal medium before heat-exchanger rig heat release is entered.
Scheme provided by the utility model in use, no matter winter or summer, for typical 1000MW heating power pot
Stove, the flue-gas temperature that air preheater is exported in the range of 250~1000MW is basically stable between 113~119 DEG C, it is to avoid
The air preheater being likely to occur during underload is blocked, corrosion condition；Meanwhile, the flue-gas temperature of denitration reactor inlet is maintained
Between 300~366 DEG C, its denitration load lower bound can be extended to 250MW.
During summer major part operating mode, this programme not only reclaims smoke discharging residual heat by boiler itself, but also by turning down vapour
The mode that turbine high pressure extraction regulating valve exclusion high pressure extraction and part heat-setting water exclusion steam turbine low-pressure draw gas is distinguished
The exclusion turbine high-pressure amount of drawing gas, the steam turbine low-pressure amount of drawing gas play a part of energy-conservation, and prioritizing selection is by squeezing high pressure
The mode for the amount of drawing gas obtains higher energy-conservation energy figure.Under winter all calculating operating modes, this programme all passes through boiler itself
Or the mode of exclusion high pressure extraction amount reclaims smoke discharging residual heat, greatly improves the energy figure of UTILIZATION OF VESIDUAL HEAT IN.
, can be with flexible modulation feed water preheater, primary air high temperature heater (HTH), auxiliary air high-temperature heating in this programme
Flue gas flow between three exhaust gases passes of device.When needing to improve denitration reactor inlet flue-gas temperature, it can turn down other
The smoke controllable register of two passages, opens the smoke controllable register of big feed water preheater passage.
The characteristics of the utility model is that two air high temperature heater (HTH)s are arranged in juxtaposition with feed water preheater in flue, and
The heat of two air high temperature heater (HTH)s and feed water preheater can be distributed by adjusting the gas baffle of respective exhaust gases passes entrance
Amount, so can flexibly be strained, during than if desired for higher denitration reactor inlet flue-gas temperature, can be coordinated and be adjusted these three
Baffle plate is to improve the exhaust gas volumn of feed water preheater passage, if primary air temperature need to be improved, and can coordinate these three gears of regulation
Plate is to improve the exhaust gas volumn of primary air high temperature heater (HTH) passage.
The primary structure of the smoke waste heat utilization system provided except above-described embodiment, connect and use, more than the flue gas
The structure of other each several parts in heat utilization system refer to prior art, repeat no more herein.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.
Smoke waste heat utilization system provided by the utility model is described in detail above.Tool used herein
Body example is set forth to principle of the present utility model and embodiment, and the explanation of above example is only intended to help and understood
Method and its core concept of the present utility model.It should be pointed out that for those skilled in the art, not taking off
On the premise of from the utility model principle, some improvement and modification can also be carried out to the utility model, these improve and modified
Also fall into the utility model scope of the claims.
Claims (8)
1. a kind of smoke waste heat utilization system, it is characterised in that including the high-temperature flue gas cooler being connected with air preheater
(12), the high-temperature flue gas cooler (12) is sequentially connected deduster, low-temperature flue gas cooler (1) and desulfurization reactor；It is described
Heat of the heat medium passage of the heat medium passage of high-temperature flue gas cooler (12) and the low-temperature flue gas cooler (1) with heat-exchanger rig
Matchmaker's passage is connected, and the heat medium passage of the heat-exchanger rig is used to heat the air for sending into the air preheater；
Being provided between the smoke inlet and Benitration reactor exhanst gas outlet of the air preheater is used for the air to flue gas cool-down
High temperature heater (HTH), the air outlet slit of the air preheater connects the air high temperature heater (HTH).
2. smoke waste heat utilization system according to claim 1, it is characterised in that the heat-exchanger rig includes primary air
Heat-exchanger rig (19) and auxiliary air heat-exchanger rig (18)；
The air high temperature heater (HTH) includes：
Primary air high temperature heater (HTH) (10), for pre- to passing sequentially through the primary air heat-exchanger rig (19) and the air
The air of hot device carries out flue gas heat exchange, to improve primary air temperature；
The auxiliary air high temperature heater (HTH) (7) in parallel with the primary air high temperature heater (HTH) (10), for passing sequentially through
State the air after auxiliary air heat-exchanger rig (18) and the air preheater and carry out flue gas heat exchange, to improve auxiliary air temperature
Degree；
Feed water preheater (5) is in parallel with the primary air high temperature heater (HTH) (10), and the heating agent of the feed water preheater (5) leads to
Road, the heat medium passage for the economizer (14) for being arranged on the Benitration reactor flue gas upstream connect with feedwater high temperature heater (HTH) (4)
Connect, current sequentially pass through the feedwater high temperature heater (HTH) (4), the feed water preheater (5) and the economizer (14).
3. smoke waste heat utilization system according to claim 2, it is characterised in that the primary air high temperature heater (HTH)
(10), the flue gas of the auxiliary air high temperature heater (HTH) (7) and the feed water preheater (5) is passed through mouth and is equipped with smoke regulation gear
Plate.
4. smoke waste heat utilization system according to claim 3, it is characterised in that the high-temperature flue gas cooler (12)
Heat medium passage, the heat medium passage of the low-temperature flue gas cooler (1) and the heat-exchanger rig are connected in series, and the low-temperature flue gas is cold
But the outlet of the heat medium passage of device (1) is connected with the import of the heat medium passage of the high-temperature flue gas cooler (12).
5. smoke waste heat utilization system according to claim 4, it is characterised in that the heat-exchanger rig includes：
Primary air heat-exchanger rig (19) and auxiliary air heat-exchanger rig (18), the two is arranged in parallel；
Enter the temperature control dress of primary air heat-exchanger rig (19), the heat medium temperature of auxiliary air heat-exchanger rig (18) for adjusting
Put, including the first flow regulating valve (11) and condensation water heater (13) being connected in parallel, the temperature regulating device is located at the height
The heating agent outlet of warm gas cooler (12).
6. smoke waste heat utilization system according to claim 5, it is characterised in that the feedwater high temperature heater (HTH) (4)
High pressure extraction pipeline, which is provided with, to be used to adjust feed temperature, the high pressure extraction regulating valve (3) of high pressure extraction vapour amount.
7. smoke waste heat utilization system according to claim 5, it is characterised in that the branch road of the heat-exchanger rig is provided with
The flow control valve that flow for the thermal medium to entering the heat-exchanger rig is controlled.
8. smoke waste heat utilization system according to claim 5, it is characterised in that the high-temperature flue gas cooler (12),
The low-temperature flue gas cooler (1) is contra-flow heat exchanger with the heat-exchanger rig.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621490447.2U CN206330139U (en) | 2016-12-30 | 2016-12-30 | A kind of smoke waste heat utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621490447.2U CN206330139U (en) | 2016-12-30 | 2016-12-30 | A kind of smoke waste heat utilization system |
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| Publication Number | Publication Date |
|---|---|
| CN206330139U true CN206330139U (en) | 2017-07-14 |
Family
ID=59293758
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621490447.2U Expired - Fee Related CN206330139U (en) | 2016-12-30 | 2016-12-30 | A kind of smoke waste heat utilization system |
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| Country | Link |
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| CN (1) | CN206330139U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106765245A (en) * | 2016-12-30 | 2017-05-31 | 国网浙江省电力公司电力科学研究院 | A kind of smoke waste heat utilization system |
| CN112503556A (en) * | 2020-12-02 | 2021-03-16 | 大唐环境产业集团股份有限公司 | Flue gas waste heat recovery device of thermal power generating unit boiler |
-
2016
- 2016-12-30 CN CN201621490447.2U patent/CN206330139U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106765245A (en) * | 2016-12-30 | 2017-05-31 | 国网浙江省电力公司电力科学研究院 | A kind of smoke waste heat utilization system |
| CN112503556A (en) * | 2020-12-02 | 2021-03-16 | 大唐环境产业集团股份有限公司 | Flue gas waste heat recovery device of thermal power generating unit boiler |
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Granted publication date: 20170714 |