CN108722127A - Desulfurization wet flue gas demister system - Google Patents
Desulfurization wet flue gas demister system Download PDFInfo
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- CN108722127A CN108722127A CN201810550578.2A CN201810550578A CN108722127A CN 108722127 A CN108722127 A CN 108722127A CN 201810550578 A CN201810550578 A CN 201810550578A CN 108722127 A CN108722127 A CN 108722127A
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- flue gas
- outlet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/005—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/65—Employing advanced heat integration, e.g. Pinch technology
- B01D2259/652—Employing advanced heat integration, e.g. Pinch technology using side coolers
Abstract
This application involves a kind of desulfurization wet flue gas demister system, the smoke inlet of former gas cooler is for being passed through former flue gas；The outlet flue of former gas cooler is connected to the entrance of desulfuration absorbing tower；The outlet of desulfuration absorbing tower is connected to the smoke inlet of wet flue gas dehydrated cooled device, by using wet flue gas dehydrated cooled device to by desulfuration absorbing tower, treated that neat stress first carries out cooling processing, reduce the humidity of neat stress, then it is discharged into chimney after carrying out heating demisting to the neat stress of low humidity by neat stress demisting heater again, the water outlet of neat stress demisting heater is connected to by first pipe with the water inlet of circulating cooling water pump；The water outlet of circulating cooling water pump is connected to by second pipe with the water inlet of former gas cooler；The water outlet of former gas cooler is connected to by third pipeline with the water inlet of neat stress demisting heater.Full load lower stack can be achieved to discharge without " white haze ", improve defogging effect.
Description
Technical field
The present invention relates to thermal power plant flue gas system technical fields, more particularly to a kind of desulfurization wet flue gas demisting system
System.
Background technology
As environmental requirement increasingly improves, the conventional measure that chimney " white haze " has been increasingly becoming thermal power plant is eliminated.One
As in the case of, power plant uses the wet flue gas of air preheater exiting flue gas waste-heat desulfuration absorbing tower discharge, but inventor is implementing
In the process, it is found that traditional technology at least has the following disadvantages：In underload, since exhaust gas temperature is low, flue gas amount is insufficient,
" white haze " phenomenon is still will produce, wet flue gas can not be made to eliminate " white haze " phenomenon under full load mode.
Invention content
Based on this, it is necessary to for the problem of traditional desulfurization demister system defogging effect difference, provide a kind of desulfurization wet flue gas
Demister system.
On the one hand, an embodiment of the present invention provides a kind of desulfurization wet flue gas demister systems, including：Former gas cooler follows
Ring cooling water pump, desulfuration absorbing tower, wet flue gas dehydrated cooled device, neat stress demisting heater and chimney；
The smoke inlet of former gas cooler is for being passed through former flue gas；
The outlet flue of former gas cooler is connected to the entrance of desulfuration absorbing tower；
The outlet of desulfuration absorbing tower is connected to the smoke inlet of wet flue gas dehydrated cooled device, the smoke of wet flue gas dehydrated cooled device
Mouth is connected to the smoke inlet of neat stress demisting heater；
The outlet flue of neat stress demisting heater is connected to the entrance of chimney；
The water outlet of neat stress demisting heater is connected to by first pipe with the water inlet of circulating cooling water pump；
The water outlet of circulating cooling water pump is connected to by second pipe with the water inlet of former gas cooler；Former flue gas cooling
The water outlet of device is connected to by third pipeline with the water inlet of neat stress demisting heater.
Desulfurization wet flue gas demister system further includes in one of the embodiments,：The water outlet of water tank, water tank passes through the 4th
Pipeline is connected to the water inlet of circulating cooling water pump.
Desulfurization wet flue gas demister system further includes air preheater, cold air heaters and cold secondary in one of the embodiments,
Wind turbine；
The air inlet and air communication of cold overfire air fan, the air outlet of cold overfire air fan and the air inlet of cold air heaters connect
It is logical；
The air outlet of cooling heater is connected to the air inlet of air preheater；
The water outlet of former gas cooler is also connected to by the 5th pipeline with the water inlet of cold air heaters；
The water outlet of cold air heaters is connected to by the 6th pipeline with the water inlet of circulating cooling water pump.
In one of the embodiments, desulfurization wet flue gas demister system further include the former gas cooler of connection outlet flue with
First flue of the entrance of desulfuration absorbing tower, be connected to outlet flue and the neat stress demisting heater of wet flue gas dehydrated cooled device into
Second flue of mouth is connected to the third flue of the outlet flue of neat stress demisting heater and the entrance of chimney.
The 5th between the water outlet and the water inlet of cold air heaters of former gas cooler in one of the embodiments,
The first flow regulating valve is provided on pipeline.
Desulfurization wet flue gas demister system further includes controller and neat stress smoke temperature detectors in one of the embodiments,
Neat stress smoke temperature detectors are set at the outlet flue of neat stress demisting heater；
Controller is communicated to connect with neat stress smoke temperature detectors, and is flowed for adjusting first according to current neat stress temperature and adjusting
The aperture of valve.
Desulfurization wet flue gas demister system further includes air-introduced machine in one of the embodiments,；
The smoke inlet of air-introduced machine is connected to the outlet flue of air preheater；The outlet flue of air-introduced machine and former gas cooler are into cigarette
Mouth connection.
The water outlet of circulating cooling water pump is provided with the first shut-off valve in one of the embodiments,；
Former flue gas smoke temperature detectors are provided at the outlet flue of former gas cooler, and former flue gas smoke temperature detectors are for examining
Survey current former flue-gas temperature；
Controller is communicated to connect with former flue gas smoke temperature detectors, and for according to current former flue-gas temperature, control first to be closed
The on off state of disconnected valve.
The water inlet of wet flue gas dehydrated cooled device is used for the outlet with condensate pump in one of the embodiments,
The water outlet of wet flue gas dehydrated cooled device with the water inlet of most final stage low-pressure heater for being connected to.
Desulfurization wet flue gas demister system further includes deduster, smoke inlet and the sky of deduster in one of the embodiments,
The outlet flue of pre- device is connected to, and the outlet flue of deduster is connected to the smoke inlet of air-introduced machine.
One or more embodiment provided by the invention at least has the advantages that：It is provided in an embodiment of the present invention de-
Sulphur wet flue gas demister system, including：Former gas cooler, circulating cooling water pump, water tank, desulfuration absorbing tower, wet flue gas dehydration are cold
But device, neat stress demisting heater and chimney；The smoke inlet of former gas cooler is for being passed through former flue gas；Former gas cooler
Outlet flue is connected to the entrance of desulfuration absorbing tower；The outlet of desulfuration absorbing tower is connected to the smoke inlet of wet flue gas dehydrated cooled device,
The outlet flue of wet flue gas dehydrated cooled device is connected to the smoke inlet of neat stress demisting heater；The smoke of neat stress demisting heater
Mouth is connected to the entrance of chimney；The water inlet that the water outlet of neat stress demisting heater passes through first pipe and circulating cooling water pump
Connection；The water outlet of water tank is connected to by the 4th pipeline with first pipe；The water outlet of circulating cooling water pump passes through second pipe
It is connected to the water inlet of former gas cooler；The water outlet of former gas cooler passes through third pipeline and neat stress demisting heater
Water inlet connection.By using wet flue gas dehydrated cooled device to by desulfuration absorbing tower, treated that neat stress first cools down
Processing, reduces the water capacity of neat stress, and then carrying out heating to the neat stress of low water capacity by neat stress demisting heater again removes
Mist greatly reduces the heat needed for demisting heating, good defogging effect can be also realized when exhaust gas temperature is low, realizes complete negative
Lotus lower stack is discharged without " white haze ", greatly improves defogging effect.
Description of the drawings
Fig. 1 is the structural schematic diagram of desulfurization wet flue gas demister system in one embodiment；
Fig. 2 is the structural schematic diagram of desulfurization wet flue gas demister system in another embodiment；
Fig. 3 is the structural schematic diagram of desulfurization wet flue gas demister system in further embodiment.
Specific implementation mode
To facilitate the understanding of the present invention, below with reference to relevant drawings to invention is more fully described.In attached drawing
Give the preferred embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.
It should be noted that when an element is considered as " connection " another element, it can be directly to separately
One element and it is in combination be integrated, or may be simultaneously present centering elements.Term as used herein " installation ", " one
End ", " other end " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the Listed Items of pass.
An embodiment of the present invention provides a kind of desulfurization wet flue gas demister systems, as shown in Figure 1, including：Former gas cooler
10, circulating cooling water pump 20, desulfuration absorbing tower 40, wet flue gas dehydrated cooled device 50, neat stress demisting heater 60 and chimney 70；
The smoke inlet of former gas cooler 10 is for being passed through former flue gas；The outlet flue of former gas cooler 10 enters with desulfuration absorbing tower 40
Mouth connection；The outlet of desulfuration absorbing tower 40 is connected to the smoke inlet of wet flue gas dehydrated cooled device 50, wet flue gas dehydrated cooled device 50
Outlet flue be connected to the smoke inlet of neat stress demisting heater 60；The outlet flue of neat stress demisting heater 60 and chimney 70
Entrance is connected to；The water outlet of neat stress demisting heater 60 is connected by the water inlet of first pipe 11 and circulating cooling water pump 20
It is logical；The water outlet of circulating cooling water pump 20 is connected to by second pipe 13 with the entrance of former gas cooler 10；Former flue gas cooling
The water outlet of device 10 is connected to by third pipeline 14 with the water inlet of neat stress demisting heater 60.
Wherein, former gas cooler 10 refers to carrying out cooling device for the gas to boiler or the discharge of air preheater 80.
Wet flue gas dehydrated cooled device 50 is to refer to realize the device for carrying out the neat stress that desulfuration absorbing tower 40 is discharged cooling and dewatering, example
Such as, it can be flue gas condenser etc..
In traditional demister system, often need wet flue gas being heated to 80 DEG C or more from 55 DEG C, the heat of required heating
It is very big, mostly by increasing the electric work of air-introduced machine 94 provided with more heat exchangers to realize warming demisting on flue gas system
Consumption, increases coal consumption of power supply, and in underload, since smoke temperature is relatively low, it is existing that heating amount deficiency still will produce chimney 70 " white haze "
As.In order to solve the problems in traditional technology, the embodiment of the present invention specifically provides a kind of desulfurization wet flue gas demister system, uses
The former flue gas that boiler or air preheater 80 is discharged in former gas cooler 10 cools down, the former flue gas with certain humidity after cooling
After carrying out high-efficiency desulfurization via desulfuration absorbing tower 40, neat stress is generated, the neat stress come out from desulfuration absorbing tower 40 is through overly moist cigarette
Qi exhaustion water cooler 50 carries out cooling down, and the saturated vapor cooling in the wet flue gas of part is removed after being condensed into liquid water,
It is heated using neat stress demisting heater 60, at this point, since wet flue gas water capacity has substantially reduced, needed for demisting
Heat is also greatly reduced, and reaches in neat stress demisting heater 60 by 50 dewatered neat stress of wet flue gas dehydrated cooled device
It is discharged into chimney 70 after certain degree of superheat, realizes and is discharged without " white haze ".Wherein, former gas cooler 10 and the heating of neat stress demisting
The heat exchange realization of device 60, the confession being made of circulating cooling water pump 20 and first pipe 11, second pipe 13 and third pipeline 14
Water circulation system is realized.Recirculated cooling water absorbs former flue gas after the pressurization of circulating cooling water pump 20 into former gas cooler 10
Waste heat enters back into neat stress demisting heater 60, and the recirculated cooling water after the heating of former gas cooler 10 enters neat stress and removes
Wet flue gas is heated in mist heater 60, improves its degree of superheat, realizes the purpose that heating demisting is carried out to dewatered neat stress, warp
The recirculated cooling water for crossing the cooling of neat stress demisting heater 60 enters 20 entrance of circulating cooling water pump again, forms a closed cycle
Water system.Desulfurization wet flue gas demister system provided in an embodiment of the present invention is first dropped by the neat stress that desulfuration absorbing tower 40 is discharged
The mode that temperature dehydration is heated again can realize cigarette under full load compared with the purpose for realizing elimination " white haze " under low energy consumption
The nothing " white haze " of chimney 70 is discharged.
Desulfurization wet flue gas demister system further includes in one of the embodiments,：The water outlet of water tank 30, water tank 30 passes through
4th pipeline 12 is connected to the water inlet of circulating cooling water pump.The heat exchange of former gas cooler 10 and neat stress demisting heater 60
It realizes, by circulating cooling water pump 20 and water tank 30 and first pipe 11, second pipe 13, third pipeline 14 and the 4th pipeline 12
The water supply circulatory system of composition realizes that 10 water side of former gas cooler uses recirculating cooling water system, to stablize recirculated cooling water
Water tank 30 is arranged before 20 entrance of circulating cooling water pump, and carries out moisturizing by water tank 30 for the inlet pressure of pump 20, to meet water
Flow demand.
In one of the embodiments, such as Fig. 2, desulfurization wet flue gas demister system further includes air preheater 80, cold air heaters
90 and cold overfire air fan 91；The air inlet and air communication of cold overfire air fan 91, air outlet and the cold wind of cold overfire air fan 91 add
The air inlet of hot device 90 is connected to；The air outlet of cold air heaters 90 is connected to the air inlet of air preheater 80；Former gas cooler 10
Water outlet be also connected to the water inlet of cold air heaters 90 by the 5th pipeline 15；The water outlet of cold air heaters 90 with pass through
6th pipeline 16 is connected to the water inlet of circulating cooling water pump 20.
Wherein, air preheater 80 refers to air preheater, is exactly that flue gas in boiler back end ductwork passes through internal cooling fin
By the heating surface into the air preheat before boiler to certain temperature, it is a kind of heat exchange performance for improving boiler, reduces
The equipment of energy expenditure.Specifically, recirculated cooling water absorbs after the pressurization of circulating cooling water pump 20 into former gas cooler 10
Former fume afterheat, then respectively enter neat stress demisting heater 60 and cold air heaters 90, neat stress demisting heater 60 and cold
The water side system of wind heater 90 is connected in parallel, and the recirculated cooling water part after heating enters in neat stress demisting heater 60
Wet flue gas is heated, its degree of superheat is improved, a part enters the cold Secondary Air of heating in cold air heaters 90, improves 80 air inlet of air preheater
One's intention as revealed in what one says temperature, two parts recirculated cooling water enter recirculated cooling water after converging and pump 20 entrances, form a closed circle water system.This
The desulfurization wet flue gas demister system that inventive embodiments provide is to more than needed fume afterheat (including the vapor vapour in the wet flue gas of part
Change latent heat) abundant, rational step is carried out, utilize the former fume afterheat of lower level before 40 entrance of desulfuration absorbing tower.A part
Heat is used to heat the neat stress of the outlet of desulfuration absorbing tower 40 discharge, and a part of heat reduces machine for heating cold Secondary Air
Group energy consumption index.
In one of the embodiments, such as Fig. 2, desulfurization wet flue gas demister system further includes connection original gas cooler 10
First flue 21 of outlet flue and the entrance of desulfuration absorbing tower 40, the outlet flue and neat stress of connection wet flue gas dehydrated cooled device 50
Second flue 22 of the smoke inlet of demisting heater 60, the entrance of the outlet flue and chimney 70 of connection neat stress demisting heater 60
Third flue 23.Specifically, being connected to by the first flue 21 between former gas cooler 10 and desulfuration absorbing tower 40, former flue gas
Desulfuration absorbing tower 40 is flowed by the first flue 21 and carries out high-efficiency desulfurization, the neat stress after 40 desulfurization of desulfuration absorbing tower is de- through wet flue gas
After water cooler 50 is dehydrated, it is transferred in neat stress demisting heater 60 and is heated through the second flue 22, through neat stress demisting
Neat stress after the heating of heater 60, which is discharged to through third flue 23 in chimney 70, to be discharged.
In one of the embodiments, such as Fig. 2, the water inlet of the water outlet and cold air heaters 90 of former gas cooler 10
Between the 5th pipeline 15 on be provided with the first flow regulating valve 31.
In thermal power plant, when unit is in underrun, such as in 30%THA operating modes, former flue-gas temperature is relatively low, takes off
The available fume afterheat of sulphur wet flue gas demister system is also less, at this point it is possible to by 10 water outlet of former gas cooler to cold wind
The first flow regulating valve 31 on the 5th pipeline 15 between 90 water inlet of heater is closed, and former flue gas heat is made all to be transferred to net cigarette
Gas demisting heater 60 needs to close circulation tune valve at this time for heating wet flue gas, and the excision of cold air heaters 90 is run,
Recirculated cooling water full flow is realized and is discharged without " white haze " by neat stress demisting heater 60.It can also be according to current unit
Operating condition adjusts the first flow regulating valve 31, controls the fume afterheat that former gas cooler 10 is swapped out and flows to cold air heaters 90
With the heat ratio of neat stress demisting heater 60, with meet system without white haze emission request.
In one of the embodiments, such as Fig. 2, desulfurization wet flue gas demister system further includes controller 92 and neat stress smoke temperature
Detector 93, neat stress smoke temperature detectors 93 are set at the outlet flue of neat stress demisting heater 60；Controller 92 and net cigarette
Gas smoke temperature detectors 93 communicate to connect, and the aperture for adjusting the first flow regulating valve 31 according to current neat stress temperature.
Specifically, controller 92 is communicated to connect with neat stress smoke temperature detectors 93, controller 92 obtains neat stress demisting and adds
The temperature information for the neat stress that neat stress smoke temperature detectors 93 at the outlet flue of hot device 60 acquire, controller 92 is according to neat stress
Temperature information, control the aperture of the first flow regulating valve 31, will under the premise of ensureing that neat stress may be implemented no white haze and discharge
Waste heat is used for the heating of cold Secondary Air.For example, being just met for facing for no white haze emission request when the temperature of neat stress is less than
When boundary's temperature, controller 92 controls the first flow regulating valve 31 and closes, and disconnects heat of the former gas cooler 10 to cold air heaters 90
Feed path.And when the temperature of neat stress is higher than the critical-temperature for being just met for no white haze emission request, it is higher by critical-temperature
Amplitude it is bigger, illustrate that current neat stress there remains more heats meeting the under the premise of of discharge without white haze, the control of controller 92
The aperture of first flow regulating valve 31 increases with the increase of neat stress temperature, and abundant fume afterheat heats cold Secondary Air, reduces machine
Group power consumption.
In one of the embodiments, such as Fig. 2, desulfurization wet flue gas demister system further includes air-introduced machine 94；Air-introduced machine 94
Smoke inlet is connected to the outlet flue of air preheater 80；The outlet flue of air-introduced machine 94 is connected to the smoke inlet of former gas cooler 10.Tool
Body, the former flue gas that air preheater 80 is discharged is guided to former gas cooler 10 by air-introduced machine 94, and former gas cooler 10 is to process
Former flue gas cools down, and absorbs fume afterheat.
Such as Fig. 2, the water outlet of circulating cooling water pump 20 are provided with the first shut-off valve 96 in one of the embodiments,；It is former
Former flue gas smoke temperature detectors 95 are provided at the outlet flue of gas cooler 10, and former flue gas smoke temperature detectors 95 are worked as detecting
Preceding original flue-gas temperature；Controller 92 is communicated to connect with former flue gas smoke temperature detectors 95, and for according to current former flue-gas temperature, control
Make the on off state of the first shut-off valve 96.Specifically, controller 92 is communicated to connect with former flue gas smoke temperature detectors 95, when former flue gas
When the former flue-gas temperature of cooler outlet flue is less than a certain value, for example, when former flue-gas temperature is less than 30 DEG C, controller 92 controls
First shut-off valve 96 is closed, and is disconnected former gas cooler 10 and is supplied to the heat of cold air heaters 90, neat stress demisting heater 60
Answer access.Optionally, as described in Figure 2, the water inlet of circulating cooling water pump 20 is provided with the second shut-off valve 99, and controller 92 is used for
According to current former flue-gas temperature, the on off state of the second shut-off valve 99 is controlled.
In one of the embodiments, such as Fig. 2, the water inlet of wet flue gas dehydrated cooled device 50 is used to go out with condensate pump
The mouth of a river is connected to, and the water outlet of wet flue gas dehydrated cooled device 50 with the water inlet of most final stage low-pressure heater 97 for being connected to.
Specifically, the water inlet of wet flue gas dehydrated cooled device 50 condenses flow for being connected to the water outlet of condensate pump
Inside through wet flue gas dehydrated cooled device 50 flows through wet flue gas dehydrated cooled when neat stress passes through wet flue gas dehydrated cooled device 50
With neat stress heat exchange occurs for the condensed water inside device 50, and the saturated vapor in neat stress is condensed into liquid water and removes, and passes through
The condensing water temperature for crossing heat exchange increases and flows to most final stage low-pressure heater 97 from 50 water outlet of wet flue gas dehydrated cooled device
Water inlet constantly provides condensed water, and recycle with dampening to realize cycle condensed water supply for wet flue gas dehydrated cooled device 50
The heat recovery of neat stress to condensate system can be reduced thermal loss of steam turbine, improve unit heat economy.Wherein, it condenses
Water cycle can be condensate pump extracted out from the hot well of condenser condensed water and be transported to wet flue gas dehydrated cooled device 50 into
The mouth of a river when condensed water flows through wet flue gas dehydrated cooled 50 inside of device, takes away a part of heat of neat stress, realizes heat exchange, make
It obtains the saturated steam in neat stress and is condensed into liquid water removing, carry out the condensed water after heat exchange by wet flue gas dehydrated cooled device
50 water outlet flows to most final stage low-pressure heater 97, then most final stage low-pressure heater 97 by the condensed water with certain heat into
Row low-pressure heating, then to the condensed water deoxygenation after low-pressure heating, feed pump gives the water after deoxygenation to high-pressure heater, warp
It is sent to boiler after crossing high-pressure heater processing, boiler heating generates steam, and steam is passed through into steam turbine, the steam of steam turbine venthole
It crosses condenser and generates the low condensed water of temperature again, to realize the recycling of condensed water cycle and neat stress heat.
Such as Fig. 3, wet flue gas dehydrated cooled device 50 are used as heat heat source, water inlet to be used in one of the embodiments,
The water outlet of source heat pump heat is accessed, the water outlet of wet flue gas dehydrated cooled device 50 is used to connect the water inlet of source heat pump heat.Condensed water
As heat pump low-temperature receiver, the water inlet of low-temperature receiver is used to access the condensed water of condenser, and the water outlet of low-temperature receiver is low for accessing most final stage
The condensed water water inlet of heater 97, the heat of heat source release is pressed to pass to low-temperature receiver condensed water by the intermediary of heat pump, coagulate
Boiler is sent to after low-pressure heating, deoxygenation, hyperbaric heating after bearing water heating, boiler heating generates steam, steam drive steamer
Machine does work, and reduces unit energy consumption, and the steam of steam turbine out generates condensed water after condenser and flows in heat pump again, heat pump
The heat discharged using condensed water absorption source heat pump heat realizes the purpose of flue gas waste heat recovery and moisture.Optionally, wet flue gas is de-
Water cooler 50 can be flue gas condensing heat exchanger.
In one of the embodiments, as shown in Fig. 2, desulfurization wet flue gas demister system further includes deduster 98, deduster
98 smoke inlet is connected to the outlet flue of air preheater 80, and the outlet flue of deduster 98 is connected to the smoke inlet of air-introduced machine 94.
In another embodiment, with reference to shown in 3, the outlet flue of the smoke inlet and air preheater 80 of former gas cooler 10
Connection, the smoke inlet of deduster 98 are connected to the outlet flue of former gas cooler 10, and the outlet flue of deduster 98 can be with air inducing
The smoke inlet of machine 94 is connected to, and the outlet flue of air-introduced machine 94 is connected to the entrance of desulfuration absorbing tower 40.
In one of the embodiments, as shown in Figure 2 and Figure 3, neat stress demisting heater 60 includes the first heat-exchanger rig
51；Wet flue gas dehydrated cooled device 50 includes the second heat-exchanger rig 61；First heat-exchanger rig 51 and the second heat-exchanger rig 61 are resistance to
The heat-exchanger rig of corrosion material.
Heat exchange is carried out when leading to cooling water using pipeline in neat stress demisting heater 60 and wet flue gas dehydrated cooled device 50 in fact
Now, it need to consider low-temperature corrosion situation, the first heat-exchanger rig 51 in neat stress demisting heater 60 and wet flue gas dehydrated cooled
The second heat-exchanger rig 61 in device 50 uses resistant material, such as fluoroplastics, enamel pipe, improves desulfurization wet flue gas demister system
Operational reliability.Optionally, the first heat-exchanger rig 51 can be tubular heat exchange device, and the second heat-exchanger rig 61 can also be tubular type
Heat-exchanger rig.
Work in order to better illustrate desulfurization wet flue gas demister system provided in an embodiment of the present invention is realized, now provides one
Specific embodiment, this embodiment are a kind of realization method of the system, do not cause to limit to the protection domain of above-described embodiment
System.
For example, certain 1000MW ultra supercritical thermal power generation unit, the former flue gas after air-introduced machine 94 exports is cold by former flue gas
But device 10 cool down after, flue-gas temperature is reduced to 65 DEG C from 95 DEG C, then cool down after former flue gas enter back into desulfuration absorbing tower 40 into
Row high-efficiency desulfurization, the neat stress come out from desulfuration absorbing tower 40 are 55 DEG C of saturation wet flue gas, first pass through wet flue gas dehydrated cooled device
50 cooling downs are to 40 DEG C, and the saturated vapor cooling in the wet flue gas of part is removed after being condensed into liquid water, using net cigarette
Gas demisting heater 60 is heated to 55-60 DEG C, is discharged into chimney 70 after reaching certain degree of superheat, realizes and discharged without " white haze ".From
The partial coagulation water that condensate pump comes out enters wet flue gas dehydrated cooled device 50 through condensate pump and absorbs fume afterheat (including part
Steam gasification latent heat in wet flue gas), water temperature is increased to 40 DEG C from 32 DEG C, then is connected to most 97 condensed water of final stage low-pressure heater
Entrance is converged with main condensate water system.10 water side of former gas cooler uses recirculating cooling water system, and recirculated cooling water is through following
After ring cooling water pump 20 pressurizes, former fume afterheat is absorbed into former gas cooler 10, water temperature is increased to 80 DEG C from 55 DEG C, then divides
Not Jin Ru neat stress demisting heater 60 and cold air heaters 90, the water side of neat stress demisting heater 60 and cold air heaters 90
System is connected in parallel, and the recirculated cooling water part after heating, which enters, heats wet flue gas in neat stress demisting heater 60, will be wet
Flue gas is heated to 55-60 DEG C from 40 DEG C, and water temperature is down to 55 DEG C from 80 DEG C；It is cold secondary that a part enters heating in cold air heaters 90
Cold wind is heated to 50 DEG C from 30 DEG C by wind, and water temperature is down to 55 DEG C from 80 DEG C.It is cold that two parts recirculated cooling water enters cycle after converging
But 20 entrance of water pump forms a closed circle water system.To ensure that water circular flow supply is sufficient, water tank 30 is to circulating cooling
Water pump 20 feeds cooling water, to meet system circulation cooling water flow demand.When unit load changes, it can adjust and flow by first
Valve 31 adjusts the water flow of water side parallel system, to realize the flexible modulation of smoke temperature and wind-warm syndrome, can also be closed by control first
96 and second shut-off valve 99 of disconnected valve cut-offs state to adjust smoke temperature, but should first ensure that the smoke temperature after heating reaches without " white haze "
The temperature requirement of discharge.For example, when unit is when underload (30%THA and following operating mode) is run, former flue-gas temperature is relatively low, can
The former fume afterheat utilized is also less, and former flue gas heat need to be completely used for heating wet flue gas, needs to close the first flow regulating valve at this time
31, the excision operation of cold air heaters 90, recirculated cooling water full flow is realized and is arranged without " white haze " by neat stress demisting heater 60
It puts.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of desulfurization wet flue gas demister system, which is characterized in that including：Former gas cooler, circulating cooling water pump, desulfurization are inhaled
Receive tower, wet flue gas dehydrated cooled device, neat stress demisting heater and chimney；
The smoke inlet of the original gas cooler is for being passed through former flue gas；
The outlet flue of the original gas cooler is connected to the entrance of the desulfuration absorbing tower；
The outlet of the desulfuration absorbing tower is connected to the smoke inlet of the wet flue gas dehydrated cooled device, the wet flue gas dehydrated cooled
The outlet flue of device is connected to the smoke inlet of the neat stress demisting heater；
The outlet flue of the neat stress demisting heater is connected to the entrance of the chimney；
The water outlet of the neat stress demisting heater is connected to by first pipe with the water inlet of the circulating cooling water pump；
The water outlet of the circulating cooling water pump is connected to by second pipe with the water inlet of the former gas cooler；The original
The water outlet of gas cooler is connected to by third pipeline with the water inlet of the neat stress demisting heater.
2. desulfurization wet flue gas demister system according to claim 1, which is characterized in that further include：Water tank, the water tank
Water outlet is connected to by the 4th pipeline with the water inlet of the circulating cooling water pump.
3. desulfurization wet flue gas demister system according to claim 1 or 2, which is characterized in that further include that air preheater, cold wind add
Hot device and cold overfire air fan；
The air inlet and air communication of the cold overfire air fan, air outlet and the cold air heaters of the cold overfire air fan
Air inlet is connected to；
The air outlet of the cooling heater is connected to the air inlet of the air preheater；
The water outlet of the original gas cooler is also connected to by the 5th pipeline with the water inlet of the cold air heaters；
The water outlet of the cold air heaters is connected to by the 6th pipeline with the water inlet of the circulating cooling water pump.
4. desulfurization wet flue gas demister system according to claim 3, which is characterized in that further include that the connection former flue gas is cold
But the first flue of the outlet flue of device and the entrance of the desulfuration absorbing tower, is connected to the outlet flue of the wet flue gas dehydrated cooled device
With the second flue of the smoke inlet of the neat stress demisting heater, it is connected to outlet flue and the institute of the neat stress demisting heater
State the third flue of the entrance of chimney.
5. desulfurization wet flue gas demister system according to claim 4, which is characterized in that the water outlet of the original gas cooler
It is provided with the first flow regulating valve on the 5th pipeline between mouth and the water inlet of the cold air heaters.
6. desulfurization wet flue gas demister system according to claim 5, which is characterized in that further include controller and neat stress cigarette
Warm detector, the neat stress smoke temperature detectors are set at the outlet flue of the neat stress demisting heater；
The controller is communicated to connect with the neat stress smoke temperature detectors, and for being adjusted according to the current neat stress temperature
The aperture of first flow regulating valve.
7. the desulfurization wet flue gas demister system according to any one of claim 4-6, which is characterized in that further include air inducing
Machine；
The smoke inlet of the air-introduced machine is connected to the outlet flue of the air preheater；The outlet flue of the air-introduced machine and the former flue gas
The smoke inlet of cooler is connected to.
8. desulfurization wet flue gas demister system according to claim 6, which is characterized in that the water outlet of the circulating cooling water pump
Mouth is provided with the first shut-off valve；
Former flue gas smoke temperature detectors are provided at the outlet flue of the original gas cooler, and the former flue gas smoke temperature detectors are used
In the current former flue-gas temperature of detection；
The controller is communicated to connect with the former flue gas smoke temperature detectors, and for according to the current former flue-gas temperature, control
Make the on off state of first shut-off valve.
9. desulfurization wet flue gas demister system according to claim 1, which is characterized in that the wet flue gas dehydrated cooled device
Water inlet is for the outlet with condensate pump, and the water outlet of the wet flue gas dehydrated cooled device with most final stage low pressure for adding
The water inlet of hot device is connected to.
10. desulfurization wet flue gas demister system according to claim 7, which is characterized in that further include deduster, the dedusting
The smoke inlet of device is connected to the outlet flue of the air preheater, and the outlet flue of the deduster and the smoke inlet of the air-introduced machine connect
It is logical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810550578.2A CN108722127A (en) | 2018-05-31 | 2018-05-31 | Desulfurization wet flue gas demister system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810550578.2A CN108722127A (en) | 2018-05-31 | 2018-05-31 | Desulfurization wet flue gas demister system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108722127A true CN108722127A (en) | 2018-11-02 |
Family
ID=63931217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810550578.2A Pending CN108722127A (en) | 2018-05-31 | 2018-05-31 | Desulfurization wet flue gas demister system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207407A (en) * | 2019-10-18 | 2020-05-29 | 云南中陇生态环境工程有限公司 | Method for improving discharged moisture content unsaturation degree through flue gas self-heating |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048307A (en) * | 2014-05-29 | 2014-09-17 | 舒少辛 | Smoke waste heat comprehensive utilization device and method |
| CN104566424A (en) * | 2015-01-12 | 2015-04-29 | 重庆中电节能技术服务有限公司 | Combined steam smoke MGGH system and flue gas treatment technology |
| CN106369623A (en) * | 2016-11-29 | 2017-02-01 | 冯伟忠 | System for removing smoke plumes through condensation, emission reduction, water collecting, heating and drying |
| CN207350355U (en) * | 2017-10-26 | 2018-05-11 | 山东泓奥电力科技有限公司 | A kind of flue gas in power station boiler condenses reheating energy conserving system |
-
2018
- 2018-05-31 CN CN201810550578.2A patent/CN108722127A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048307A (en) * | 2014-05-29 | 2014-09-17 | 舒少辛 | Smoke waste heat comprehensive utilization device and method |
| CN104566424A (en) * | 2015-01-12 | 2015-04-29 | 重庆中电节能技术服务有限公司 | Combined steam smoke MGGH system and flue gas treatment technology |
| CN106369623A (en) * | 2016-11-29 | 2017-02-01 | 冯伟忠 | System for removing smoke plumes through condensation, emission reduction, water collecting, heating and drying |
| CN207350355U (en) * | 2017-10-26 | 2018-05-11 | 山东泓奥电力科技有限公司 | A kind of flue gas in power station boiler condenses reheating energy conserving system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111207407A (en) * | 2019-10-18 | 2020-05-29 | 云南中陇生态环境工程有限公司 | Method for improving discharged moisture content unsaturation degree through flue gas self-heating |
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