CN107559861A - Three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying - Google Patents

Three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying Download PDF

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CN107559861A
CN107559861A CN201710802615.XA CN201710802615A CN107559861A CN 107559861 A CN107559861 A CN 107559861A CN 201710802615 A CN201710802615 A CN 201710802615A CN 107559861 A CN107559861 A CN 107559861A
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heat
water
temperature
air
section
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张茂勇
王学勇
尚升
李先庭
石文星
王宝龙
陈炜
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Beijing Qing Technology Research Institute Co Ltd Datian Energy Industry
Tsinghua University
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Beijing Qing Technology Research Institute Co Ltd Datian Energy Industry
Tsinghua University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

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Abstract

Three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying, belong to air-to-air energy recovery and boiler heat supplying technical field.The spray column heat exchange structure unified using three towers, it is respectively air warming and humidifying area, fume high-temperature heat transfer zone, flue gas low-temperature heat transfer zone from bottom to top, flue gas enters high temperature heat transfer zone from the middle part of tower and exchanged heat with high-temperature residual heat recirculated water, then rises to low-temperature heat exchange area and discharged after being exchanged heat with low temperature exhaust heat recirculated water from tower top;Low temperature exhaust heat recirculated water is sprayed from low temperature spray equipment and exchanged heat, then is supplied to after water wind separator the heat exchange of air warming and humidifying section spray and heating boiler air intake or is directly gone downwards to high temperature heat transfer zone;High-temperature residual heat recirculated water exchanges heat from high temperature spray equipment feeding high temperature heat transfer zone and is confessed after being pooled to bottom of towe pond and heat hot net water.Main heat transfer process needed for the i.e. achievable off-gas recovery heat supply of above-mentioned set of system, greatly improves system flow, reduction number of devices and space-consuming, reduces investment and energy consumption.

Description

Three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying
Technical field
The present invention relates to three towers circulated based on boiler exhaust gas condensate heat-carrying unification heat-exchange method and device, belong to air draft Recuperation of heat and boiler heat supplying technical field.
Background technology
Contain substantial amounts of vapor, many technique rows in boiler exhaust gas using the fuel combustions such as fire coal, natural gas heating Also a large amount of vapor are contained in wind, though the smoke evacuation or air draft of its a large amount of latent heat and sensible heat is scattered and disappeared in vain.Reclaimed for depth such High-humidity gas fume or air waste heat, currently used UTILIZATION OF VESIDUAL HEAT IN mode include:Dividing wall type condensation heat recovery device, based on absorption Flue gas condensing heat reclamation device of heat pump heat exchanging etc., but etching problem, heat transfer zone high cost be present in the former, and the latter is present The problems such as cost height of absorption heat pump causes the investment payback time often longer.
The multinomial innovative boiler exhaust gas deep condensation heat recovery technology mode of Tsing-Hua University's exploitation, including " steamed based on water Boiler exhaust gas heat wet directly recovery method and the device of airborne thermal cycle "(2017104371042), a kind of " pot of nicotinic acids Fire grate cigarette total heat recovery and flue gas disappear white device "(2017206805342)Deng low using being heated from flue gas low-temperature section recovery waste heat Warm remaining hot water is simultaneously used for inlet air of boiler warming and humidifying so as to improve smoke evacuation water capacity and its dew-point temperature, again from fume high-temperature Section recovery waste heat is used for the mode for heating the low temperature exhaust heat water such as heat supply network backwater, realizes and exhaust gas temperature is greatly reduced to 20~30 DEG C and reclaim the purpose of its sensible heat and latent heat comprehensively, but be wherein high temperature section and low-temperature zone two by exhaust heat recovery procedure decomposition Be connected with each other but separate process and device, along with air spray warming and humidifying device, there is space-consuming compared with Greatly, system flow is more complicated and corollary equipment part excessively causes that trouble point is excessive, water resistance in air system increases power consumption compared with conference Amount, the problems such as initial cost is still higher, therefore its heat exchange mode and device systems are up for further optimization.
Contain a large amount of vapor in the technique air draft of many industrial enterprises, be generally easy to rotten because it contains impurity, waste gas etc. The compositions such as erosion, fouling, prior art also tend to be difficult to effective recycling its residual heat resources.
In addition, a large amount of vapor etc. cause obvious white cigarette contained by chimney(White haze)Phenomenon is recognized as belonging to important at present Pollution problem, it is therefore desirable to do " disappearing white " processing.
The content of the invention
The purpose of the present invention and task are the shapes for containing a large amount of vapor in above-mentioned boiler exhaust gas or technique air draft Condition, using the high temperature section of Trinitarian three-level spray column heat exchange structure, respectively boiler exhaust gas of the extraction containing a large amount of vapor With low-temperature zone waste heat for heating hot net water and inlet air of boiler, so as to realize the hot wet directly recovery of boiler exhaust gas and chimney row Cigarette disappears white.
The present invention specific descriptions be:Three towers unification heat-exchange method and dress based on the circulation of boiler exhaust gas condensate heat-carrying Put, using integration three-level spray column heat exchange structure, respectively extraction containing a large amount of vapor boiler exhaust gas high temperature section and Low-temperature zone waste heat is for heating hot net water and inlet air of boiler, and the capital equipment in its system flow is by boiler 101, minimum discharge Processing unit 102, pressure fan 103, air-introduced machine 104 and three-level heat transfer spray tower 105 form, described three-level heat transfer spray tower 105 heat exchange structures unified using three towers, respectively air warming and humidifying area, fume high-temperature heat transfer zone, flue gas are low from bottom to top Warm heat transfer zone, wherein air warming and humidifying area and fume high-temperature heat transfer zone are completely separable by flue gas bottom of towe pond baseboard 13, high humidity Flue gas F is entered in tower by smoke-intake pipe 3 in the middle part of spray column, with top water contact and humidifying flue gas cool-down to connect in equal cigarette section 4 The cooling humidification flue gas G of nearly saturation state, cooling humidification flue gas G flow up into high-temperature heat transfer section 5 with being sprayed by high temperature section The water smoke that device 6 sprays carries out direct contact heat transfer and cooling and dehumidification, enters low-temperature heat exchange after water wind part flow arrangement 7 upwards Section 8 and the water smoke with being sprayed by low-temperature zone spray equipment 9 carry out direct contact heat transfer simultaneously cooling and dehumidification, are adjusted through smoke moisture Enter exhanst gas outlet section 11 after device 10, low-temperature smoke extraction H is then discharged by the outlet flue of exhanst gas outlet section 11, from air tower bottom water The low temperature exhaust heat water in pond 20 delivers to the water inlet of low-temperature zone spray equipment 9 after the pressurization of low temperature water-circulating pump 21, and through low-temperature zone The nozzle atomization spray of spray equipment 9 is descending, absorbs heat in low-temperature heat exchange section 8 and is passed through after significantly heating up by the shape of water wind part flow arrangement 7 Into low temperature exhaust heat water water outlet J;15 high-temperature residual heat water water inlet is changed from the water inlet of high temperature section spray equipment 6 from hot net water preheating table Mouth enters, and the spray of the nozzle atomization through high temperature section spray equipment 6 is descending, absorbs heat and absorbs big from flue gas in high-temperature heat transfer section 5 Measure descending and through dropping down onto flue gas bottom of towe pond 1 under equal cigarette section 4 after condensate;The bottom in flue gas bottom of towe pond 1 is provided with recirculated water Export and be connected with high temperature water-circulating pump 14, and high-temperature residual heat water is sent out by high temperature water-circulating pump 14 and supplied water to hot net water preheating table Change 15 heating side-entrance, hot net water preheating table change 15 heating side outlet then with the water inlet of high temperature section spray equipment 6 and/or The water inlet of the air shower apparatus 17 in air warming and humidifying area is connected, and hot net water preheating table changes 15 heated side-entrance and heat Net backwater water inlet M is communicated, and the heated side outlet that hot net water preheating table changes 15 communicates with heat supply network backwater water outlet N;Flue gas bottom of towe water The top in pond 1 is provided with moisturizing import and communicated with high temperature moisturizing L and aeration water quality regulating device 12 and its water conditioner K, flue gas The top in bottom of towe pond 1 is additionally provided with cigarette tower overflow pipe 2;Under the shower water of the air shower apparatus 17 in air warming and humidifying area OK, it is descending after 18 pairs of air warming and humidifyings of air warming and humidifying section and through equal wind section 19 under drop down onto air tower bottom pond 20, it is empty The top in gas bottom of towe pond 20 is provided with moisturizing import and communicated with low temperature moisturizing O, and top is additionally provided with void tower overflow pipe 24, bottom Portion is additionally provided with blow-off pipe 22;Surrounding air A is entered in tower by spray column bottom blast pipe 25, is drenched in equal wind section 19 with top Water contacts and makes air warming and humidifying close to the heating air B of saturation state, is upwardly into air warming and humidifying section 18 and by sky The water smoke that gas blowout shower device 17 sprays carries out direct contact heat transfer and the humidification that heats up, and enters after air humidity adjusting device 23 Air outlet slit section 16, reaches heating humidifying air C state parameter, and by air outlet slit section 16 air outlet through air-introduced machine 103 Turn into the inlet air of boiler D of whole state after pressurization and heating, and through E warps of being discharged fume in burning in the stove of boiler 101 and the stove after heat exchange Turn into the high-humidity gas fume F of whole state after minimum discharge processing unit 102, air-introduced machine 104, enter back into three-level heat transfer spray tower 105 Fume high-temperature heat transfer zone equal cigarette section 4 in and as cooling humidification flue gas G, it is then up respectively through fume high-temperature heat transfer zone and cigarette Gas low-temperature heat exchange area turns into low-temperature smoke extraction H after carrying out cooling and dehumidification after the exhaust opening discharge of exhanst gas outlet section 11.
Three towers based on the circulation of boiler exhaust gas condensate heat-carrying unify heat-exchanger rig, collect in the spray tower structure of integration Into the fume high-temperature of a large amount of recovery condensates and its waste heat heat exchange, flue gas significantly cool flue gas low-temperature heat exchange, air significantly The direct contact type spray heat exchange mode of three kinds of different characteristics of air warming and humidifying of heating dehumidification, three-level heat transfer spray tower 105 The heat exchange structure unified using three towers, it is divided into air warming and humidifying area, fume high-temperature heat transfer zone, flue gas low-temperature heat exchange from bottom to top It is completely separable by flue gas bottom of towe pond baseboard 13 between area's three parts, wherein air warming and humidifying area and fume high-temperature heat transfer zone, The smoke inlet of the equal cigarette section 4 of fume high-temperature heat transfer zone is communicated by smoke-intake pipe 3 with high-humidity gas fume F in the middle part of spray column, and flue gas is equal The cooling that cigarette section 4 reaches close to saturation state humidifies flue gas G, and the bottom of equal cigarette section 4 is provided with flue gas bottom of towe pond 1, and top is then Communicated with high-temperature heat transfer section 5, the top of high-temperature heat transfer section 5 is provided with high temperature section spray equipment 6, high temperature section spray equipment 6 it is upper Portion is provided with water wind part flow arrangement 7, and the top of water wind part flow arrangement 7 communicates with low-temperature heat exchange section 8, the top of low-temperature heat exchange section 8 Low-temperature zone spray equipment 9 is provided with, the top of low-temperature zone spray equipment 9 is provided with flue gas humidity regulating device 10, smoke moisture The top of adjusting means 10 communicates with exhanst gas outlet section 11, and the outlet flue that exhanst gas outlet section 11 communicates communicates with low-temperature smoke extraction H, low The water inlet of temperature section spray equipment 9 is connected through low temperature water-circulating pump 21 with the low temperature exhaust heat water delivery port in air tower bottom pond 20, The nozzle atomization shower water of low-temperature zone spray equipment 9 absorbs heat through low-temperature heat exchange section 8 and falls into water wind part flow arrangement after significantly heating up 7, the delivery port of water wind part flow arrangement 7 sends out low temperature exhaust heat water water outlet J, and the delivery port changes 15 heated side with hot net water preheating table Water inlet again with air shower apparatus 17 is connected after outlet is connected, hot net water preheating table change 15 heating side outlet also with high temperature The water inlet of section spray equipment 6 is connected, and hot net water preheating table changes 15 heating side-entrance then through high temperature water-circulating pump 14 and flue gas The bottom circulating water outlet in bottom of towe pond 1 is connected, and hot net water preheating table changes 15 heated side-entrance and heat supply network backwater water inlet M phases Logical, the heated side outlet that hot net water preheating table changes 15 is communicated with heat supply network backwater water outlet N, and the top in flue gas bottom of towe pond 1 is set Have moisturizing import and communicated with high temperature moisturizing L and aeration water quality regulating device 12 and its water conditioner K, flue gas bottom of towe pond 1 it is upper Portion is additionally provided with cigarette tower overflow pipe 2, the nozzle atomization shower water of air shower apparatus 17 through the heat release of air warming and humidifying section 18 simultaneously Fall into air tower bottom pond 20 through equal wind section 19 after significantly cooling, the top in air tower bottom pond 20 be provided with moisturizing import and with Low temperature moisturizing O is communicated, and top is additionally provided with void tower overflow pipe 24, and bottom is additionally provided with blow-off pipe 22, the air inlet of equal wind section 19 Communicated outside tower through blast pipe 25 with surrounding air A, in tower then with heating air B communicate, air outlet slit section 16 Ta Nei with Heating humidifying air C is communicated, and is then communicated outside tower by pressure fan 103 with inlet air of boiler D, stoves of the inlet air of boiler D through boiler 101 Thorax and exhaust gases passes communicate with smoke evacuation E in stove, and equal cigarette section 4 communicates outside tower with high-humidity gas fume F, then with reaching close to full in tower Communicated with the cooling humidification flue gas G of state, the outlet flue of exhanst gas outlet section 11 communicates with low-temperature smoke extraction H.
High-temperature heat transfer section 5, low-temperature heat exchange section 8 and air warming and humidifying section 18 are that flue gas or air and shower water composition are vertical The countercurrent flow structure of arrangement, wherein internal set filler;Also it internal can be not provided with filler and use dead band structure.
The exhanst gas outlet section 11 on spray column top communicates with low-temperature smoke extraction H outlet flue and forms the nicotinic acids of integral type Spray column chimney structure, wherein the diameter of outlet section 11 it is equal compared with the low-temperature heat exchange area of bottom or reduce.
Water wind part flow arrangement 7 is provided with current derived type structure and gas flows up passage.
Water wind part flow arrangement 7 is not provided with spray column, i.e. the part forms dead band structure, now no longer more than setting and low temperature The outlet pipe for the water wind part flow arrangement 7 that hot water effluent J is communicated, under fall on the low temperature exhaust heat water of the dead band structure and continue traveling downwardly and pass through Enter high-temperature heat transfer section 5 after high temperature section spray equipment 6.
Aeration water quality regulating device 12 and the supplement source phase with regulation acid-base value, the water conditioner E of anti-corrosion, scale-inhibiting function It is logical.
High temperature section spray equipment 6, low-temperature zone spray equipment 9 and air shower apparatus 17 both can be individual layer spray structures, Can also be that N layers spray structure forms, wherein N>1.
The multinomial innovative boiler exhaust gas deep condensation heat recovery technology mode that the present invention can develop as Tsing-Hua University, bag Include " boiler exhaust gas heat wet directly recovery method and device based on the circulation of vapor heat-carrying "(2017104371042), a kind of " cigarette Boiler exhaust gas total heat recovery and the flue gas of tower unification disappear white device "(2017206805342)Etc. innovative flue gas heat recovery technology Supporting core heat-exchanger rig, realize the countercurrent flue gas waste heat recovery of brand-new three towers unification and for being heated to inlet air of boiler The mode of humidification realizes boiler exhaust gas recuperation of heat and is used for waste heat for supplying, wherein flue gas and the air spray with different parameters respectively The superposition type countercurrent flow that formation connection in series-parallel is combined between water, the wherein a large amount of Latent heats of high temperature section recovery and sensible heat waste heat, And high-temperature residual heat water is run using the small temperature difference mode of big flow;Then deep temperature reduction dehumidification, low temperature exhaust heat water can be big for low-temperature zone flue gas The temperature difference is run;Air warming and humidifying Duan Ze uses flue gas low-temperature section waste heat to the big temperature difference warming and humidifying of inlet air of boiler progress, wherein The big temperature difference operation of low temperature exhaust heat water.Above-mentioned high-temperature residual heat water can heat heat supply network backwater and be used for heat supply, and heating boiler air intake is used In reduction fuel consumption.A large amount of condensates also may be recovered utilization in flue gas, to reach the purpose for saving groundwater resources.Together When, this technology mode also can reach the white effect that disappears of boiler exhaust gas.Therefore, compared with the single-stage flue gas heat exchange mode of routine, this Technical approach is directed to the heat transfer characteristic brought in different humiture sections from device, realizes different waste heat grades, difference heat needs The Optimized Matching for the recovery technology mode asked, and significantly simplify heat transfer process, the structure of heat-exchanger rig and supporting water wind system The design of system and in-site installation and operation, have significant technical advantage in the deep condensation recuperation of heat field of boiler exhaust gas.
Brief description of the drawings
Fig. 1,2 are system schematics of the invention.
Each unit number and title are as follows in Fig. 1,2.
Flue gas bottom of towe pond 1, cigarette tower overflow pipe 2, smoke-intake pipe 3, equal cigarette section 4, high-temperature heat transfer section 5, high temperature section spray equipment 6th, water wind part flow arrangement 7, low-temperature heat exchange section 8, low-temperature zone spray equipment 9, flue gas humidity regulating device 10, exhanst gas outlet section 11, Aeration water quality regulating device 12, flue gas bottom of towe pond baseboard 13, high temperature water-circulating pump 14, hot net water preheating table change 15, air outlet slit section 16th, air shower apparatus 17, air warming and humidifying section 18, equal wind section 19, air tower bottom pond 20, low temperature water-circulating pump 21, row Dirty pipe 22, air humidity adjusting device 23, void tower overflow pipe 24, blast pipe 25, surrounding air A, heating air B, heating humidification Smoke evacuation E in air C, inlet air of boiler D, stove, high-humidity gas fume F, cooling humidification flue gas G, low-temperature smoke extraction H, low temperature exhaust heat water water outlet J, Water conditioner K, high temperature moisturizing L, heat supply network backwater water inlet M, heat supply network backwater water outlet N, low temperature moisturizing O.
Embodiment
Fig. 1,2 are system schematics and embodiment of the invention.
The specific embodiment 1 of the present invention is as follows.
Three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying, are sprayed using the three-level of integration Drench tower heat exchange structure, the capital equipment in its system flow by boiler 101, minimum discharge processing unit 102, pressure fan 103, draw Blower fan 104 and three-level heat transfer spray tower 105 form, the heat exchange structure that described three-level heat transfer spray tower 105 is unified using three towers, It is respectively air warming and humidifying area, fume high-temperature heat transfer zone, wherein flue gas low-temperature heat transfer zone, air warming and humidifying area from bottom to top Completely separable by flue gas bottom of towe pond baseboard 13 with fume high-temperature heat transfer zone, high-humidity gas fume F is entered by smoke-intake pipe 3 in the middle part of spray column In tower, with top water contact and making the cooling of flue gas cool-down humidification close to saturation state humidify flue gas G, drop in the equal cigarette section 4 Temperature humidification flue gas G flows up into high-temperature heat transfer section 5 and carries out direct contact type with the water smoke sprayed by high temperature section spray equipment 6 Exchange heat simultaneously cooling and dehumidification, enters low-temperature heat exchange section 8 after water wind part flow arrangement 7 upwards and with being sprayed by low-temperature zone spray equipment 9 Water smoke carry out direct contact heat transfer and cooling and dehumidification, exhanst gas outlet section 11 is entered after flue gas humidity regulating device 10, it is low Temperature smoke evacuation H is then discharged by the outlet flue of exhanst gas outlet section 11, and the low temperature exhaust heat water from air tower bottom pond 20 follows through water at low temperature Ring pump 21 delivers to the water inlet of low-temperature zone spray equipment 9 after pressurizeing, and under the spray of the nozzle atomization through low-temperature zone spray equipment 9 OK, absorb heat in low-temperature heat exchange section 8 and passed through after significantly heating up and low temperature exhaust heat water water outlet J is formed by water wind part flow arrangement 7;From heat supply network The high-temperature residual heat water water inlet that water preheating table changes 15 enters from the water inlet of high temperature section spray equipment 6, and through high temperature section spray equipment 6 Nozzle atomization spray it is descending, absorb heat and absorb descending and through under equal cigarette section 4 after a large amount of condensates from flue gas in high-temperature heat transfer section 5 Drop down onto flue gas bottom of towe pond 1;The bottom in flue gas bottom of towe pond 1 is provided with circulating water outlet and is connected with high temperature water-circulating pump 14, And by high temperature water-circulating pump 14 send out high-temperature residual heat water supply water change to hot net water preheating table 15 heating side-entrance, hot net water preheats Plate change 15 heating side outlet then with the water inlet of high temperature section spray equipment 6 and the air shower apparatus 17 in air warming and humidifying area Water inlet be connected, hot net water preheating table change 15 heated side-entrance and heat supply network backwater water inlet M communicate, hot net water preheating table changes 15 heated side outlet communicates with heat supply network backwater water outlet N;The top in flue gas bottom of towe pond 1 is provided with moisturizing import and and high temperature Moisturizing L and aeration water quality regulating device 12 and its water conditioner K communicate, and the top in flue gas bottom of towe pond 1 is additionally provided with cigarette tower overflow Pipe 2;The shower water of the air shower apparatus 17 in air warming and humidifying area is descending, adds in the 18 pairs of air heating of air warming and humidifying section Descending and through dropping down onto air tower bottom pond 20 under equal wind section 19 after wet, the top in air tower bottom pond 20 is provided with moisturizing import simultaneously Communicated with low temperature moisturizing O, top is additionally provided with void tower overflow pipe 24, and bottom is additionally provided with blow-off pipe 22;Surrounding air A is by spraying Tower bottom blast pipe 25 enters in tower, with top water contact and making air warming and humidifying close to saturation state in the equal wind section 19 Heating air B, be upwardly into air warming and humidifying section 18 and directly contacted with the water smoke sprayed by air shower apparatus 17 Formula exchanges heat and the humidification that heats up, and air outlet slit section 16 is entered after air humidity adjusting device 23, reaches heating humidifying air C shape State parameter, and by air outlet slit section 16 air outlet after air-introduced machine 103 pressurizes and heated up turn into whole state inlet air of boiler D, And smoke evacuation E turns into after minimum discharge processing unit 102, air-introduced machine 104 in the stove after burning and exchanging heat in the stove of boiler 101 The high-humidity gas fume F of whole state, enter back into three-level heat transfer spray tower 105 fume high-temperature heat transfer zone equal cigarette section 4 in and as drop Temperature humidification flue gas G, then up go out respectively after fume high-temperature heat transfer zone and flue gas low-temperature heat transfer zone carry out cooling and dehumidification through flue gas Turn into low-temperature smoke extraction H after the exhaust opening discharge of mouth section 11.
Three towers based on the circulation of boiler exhaust gas condensate heat-carrying unify heat-exchanger rig, and three-level heat transfer spray tower 105 uses three The heat exchange structure of tower unification, is divided into air warming and humidifying area, fume high-temperature heat transfer zone, flue gas low-temperature heat transfer zone three from bottom to top Point, completely separable by flue gas bottom of towe pond baseboard 13 wherein between air warming and humidifying area and fume high-temperature heat transfer zone, spray column The smoke inlet of the equal cigarette section 4 of middle part fume high-temperature heat transfer zone is communicated by smoke-intake pipe 3 with high-humidity gas fume F, and flue gas reaches in equal cigarette section 4 Flue gas G is humidified to the cooling close to saturation state, the bottom of equal cigarette section 4 is provided with flue gas bottom of towe pond 1, and top is then changed with high temperature Hot arc 5 communicates, and the top of high-temperature heat transfer section 5 is provided with high temperature section spray equipment 6, and the top of high temperature section spray equipment 6 is provided with Water wind part flow arrangement 7, the top of water wind part flow arrangement 7 communicate with low-temperature heat exchange section 8, and the top of low-temperature heat exchange section 8 is provided with low Temperature section spray equipment 9, the top of low-temperature zone spray equipment 9 are provided with flue gas humidity regulating device 10, flue gas humidity regulating device 10 top communicates with exhanst gas outlet section 11, and the outlet flue that exhanst gas outlet section 11 communicates communicates with low-temperature smoke extraction H, low-temperature zone spray The water inlet of device 9 is connected through low temperature water-circulating pump 21 with the low temperature exhaust heat water delivery port in air tower bottom pond 20, low-temperature zone spray The nozzle atomization shower water of shower device 9 absorbs heat through low-temperature heat exchange section 8 and water wind part flow arrangement 7 is fallen into after significantly heating up, and water wind divides The delivery port for flowing device 7 sends out low temperature exhaust heat water water outlet J, and the heating side outlet that the delivery port changes 15 with hot net water preheating table is connected The water inlet again with air shower apparatus 17 is connected afterwards, and the heating side outlet that hot net water preheating table changes 15 also sprays dress with high temperature section Put 6 water inlet to be connected, hot net water preheating table changes 15 heating side-entrance then through high temperature water-circulating pump 14 and flue gas bottom of towe pond 1 Bottom circulating water outlet be connected, hot net water preheating table change 15 heated side-entrance and heat supply network backwater water inlet M communicate, hot net water The heated side outlet that preheating table changes 15 communicates with heat supply network backwater water outlet N, and the top in flue gas bottom of towe pond 1 is provided with moisturizing import And communicated with high temperature moisturizing L and aeration water quality regulating device 12 and its water conditioner K, the top in flue gas bottom of towe pond 1 is additionally provided with Cigarette tower overflow pipe 2, the nozzle atomization shower water of air shower apparatus 17 is through the heat release of air warming and humidifying section 18 and after significantly cooling Fall into air tower bottom pond 20 through equal wind section 19, the top in air tower bottom pond 20 be provided with moisturizing import and with low temperature moisturizing O Communicate, top is additionally provided with void tower overflow pipe 24, and bottom is additionally provided with blow-off pipe 22, and the air inlet of equal wind section 19 is outside tower through entering Airduct 25 communicates with surrounding air A, is then communicated in tower with heating air B, and air outlet slit section 16 is empty in Ta Nei and heating humidification Gas C is communicated, and is then communicated outside tower by pressure fan 103 with inlet air of boiler D, and burner hearth and flue gas of the inlet air of boiler D through boiler 101 lead to Road communicates with smoke evacuation E in stove, and equal cigarette section 4 communicates outside tower with high-humidity gas fume F, then with reaching the drop close to saturation state in tower Temperature humidification flue gas G is communicated, and the outlet flue of exhanst gas outlet section 11 communicates with low-temperature smoke extraction H.
High-temperature heat transfer section 5, low-temperature heat exchange section 8 and air warming and humidifying section 18 are that flue gas or air and shower water composition are vertical The countercurrent flow structure of arrangement, wherein internal be not provided with filler and use dead band structure.
The exhanst gas outlet section 11 on spray column top communicates with low-temperature smoke extraction H outlet flue and forms the nicotinic acids of integral type Spray column chimney structure, the wherein diameter of outlet section 11 is equal compared with the low-temperature heat exchange area of bottom.
Water wind part flow arrangement 7 is provided with current derived type structure and gas flows up passage.
Aeration water quality regulating device 12 and the supplement source phase with regulation acid-base value, the water conditioner E of anti-corrosion, scale-inhibiting function It is logical.
High temperature section spray equipment 6, low-temperature zone spray equipment 9 and air shower apparatus 17 are N layers spray structure compositions, wherein N>1。
The specific embodiment 2 of the present invention is as follows:Water wind part flow arrangement 7, the i.e. portion are not provided with the spray column of the embodiment Point dead band structure is formed, the outlet pipe with the low temperature exhaust heat water water outlet J water wind part flow arrangements 7 communicated, whereabouts are now no longer set Low temperature exhaust heat water to the dead band structure continues traveling downwardly and enters high-temperature heat transfer section 5 after high temperature section spray equipment 6.High temperature exchanges heat The inside of section 5, low-temperature heat exchange section 8 and air warming and humidifying section 18 sets filler respectively.In addition to above-mentioned difference, remainder is the same as tool Body embodiment 1.
Trinitarian three-level superposition type spray tower structure is used to realize boiler it should be noted that the present invention proposes The deep condensation recuperation of heat of flue gas is simultaneously used for inlet air of boiler warming and humidifying and heating heat supply network backwater, and gives and how to use three Level spray mode realizes the specific implementation method, flow and implementation of above-mentioned purpose, and can according to this conceptual solutions There is the specific implementation device of different specific implementation measures and different structure, above-mentioned embodiment is only one kind therein , the embodiment of any other like simple deformation, for example with different barrel dliameter structures, or use square-section generation For circular cross-section, using different Water-quality treater and method;Using different heat exchange element structures and its simple deformation;Or Person simply adjusts remaining hot water Inlet and outlet water parameter and classification quantity;Or carry out the mode of texturing that average expert personage is contemplated that Deng, or by the technical approach with same or analogous structure be applied to different flue gases or air draft species, etc. and it is other it is similar should With occasion, protection scope of the present invention is each fallen within.

Claims (9)

1. three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying, are sprayed using the three-level of integration Tower heat exchange structure, the high temperature section of boiler exhaust gas of the extraction containing a large amount of vapor and low-temperature zone waste heat are for heating heat supply network respectively Water and inlet air of boiler, the capital equipment in its system flow is by boiler(101), minimum discharge processing unit(102), pressure fan (103), air-introduced machine(104)With three-level heat transfer spray tower(105)Composition, it is characterised in that:Described three-level heat transfer spray tower (105)The heat exchange structure unified using three towers, from bottom to top respectively air warming and humidifying area, fume high-temperature heat transfer zone, flue gas Low-temperature heat exchange area, wherein air warming and humidifying area and fume high-temperature heat transfer zone are by flue gas bottom of towe pond baseboard(13)It is completely separable, High-humidity gas fume(F)By smoke-intake pipe in the middle part of spray column(3)Into in tower, in equal cigarette section(4)Interior and top water contact simultaneously makes flue gas The cooling of cooling humidification close to saturation state humidifies flue gas(G), cooling humidification flue gas(G)Flow up into high-temperature heat transfer section (5)With by high temperature section spray equipment(6)The water smoke of ejection carries out direct contact heat transfer and cooling and dehumidification, is shunted upwards through water wind Device(7)Enter low-temperature heat exchange section afterwards(8)And with by low-temperature zone spray equipment(9)The water smoke of ejection carries out direct contact heat transfer And cooling and dehumidification, through flue gas humidity regulating device(10)Enter exhanst gas outlet section afterwards(11), low-temperature smoke extraction(H)Then by exhanst gas outlet Section(11)Outlet flue discharge, from air tower bottom pond(20)Low temperature exhaust heat water through low temperature water-circulating pump(21)Sent after pressurization To low-temperature zone spray equipment(9)Water inlet, and through low-temperature zone spray equipment(9)Nozzle atomization spray it is descending, changed in low temperature Hot arc(8)Absorb heat and passed through after significantly heating up by water wind part flow arrangement(7)Form low temperature exhaust heat water water outlet(J);It is pre- from hot net water Hot plate changes(15)The water inlet of high-temperature residual heat water from high temperature section spray equipment(6)Water inlet enter, and through high temperature section spray equipment (6)Nozzle atomization spray it is descending, in high-temperature heat transfer section(5)Absorb heat and absorb descending after a large amount of condensates and through equal cigarette from flue gas Section(4)Under drop down onto flue gas bottom of towe pond(1);Flue gas bottom of towe pond(1)Bottom be provided with circulating water outlet and followed with high-temperature water Ring pump(14)Connection, and by high temperature water-circulating pump(14)The water supply of high-temperature residual heat water is sent out to change to hot net water preheating table(15)Heating Side-entrance, hot net water preheating table change(15)Heating side outlet then with high temperature section spray equipment(6)Water inlet and(Or)Air The air shower apparatus in warming and humidifying area(17)Water inlet be connected, hot net water preheating table changes(15)Heated side-entrance with heat Net backwater is intake(M)Communicate, hot net water preheating table changes(15)Heated side outlet and heat supply network backwater water outlet(N)Communicate;Flue gas Bottom of towe pond(1)Top be provided with moisturizing import and with high temperature moisturizing(L)And aeration water quality regulating device(12)And its water quality adjustment Agent(K)Communicate, flue gas bottom of towe pond(1)Top be additionally provided with cigarette tower overflow pipe(2);The air spray in air warming and humidifying area Device(17)Shower water it is descending, in air warming and humidifying section(18)To descending after air warming and humidifying and through equal wind section(19)Under Drop down onto air tower bottom pond(20), air tower bottom pond(20)Top be provided with moisturizing import and with low temperature moisturizing(O)Communicate, Top is additionally provided with void tower overflow pipe(24), bottom is additionally provided with blow-off pipe(22);Surrounding air(A)By spray column bottom air intake Pipe(25)Into in tower, in equal wind section(19)Interior and top water contact simultaneously makes heating of the air warming and humidifying close to saturation state Air(B), it is upwardly into air warming and humidifying section(18)With by air shower apparatus(17)The water smoke of ejection is directly contacted Formula exchanges heat and the humidification that heats up, through air humidity adjusting device(23)Enter air outlet slit section afterwards(16), reach heating humidifying air (C)State parameter, and by air outlet slit section(16)Air outlet through air-introduced machine(103)Turn into whole state after pressurization and heating Inlet air of boiler(D), and through boiler(101)Stove in burning and heat exchange after stove in discharge fume(E)Through minimum discharge processing unit (102), air-introduced machine(104)Turn into the high-humidity gas fume of whole state afterwards(F), enter back into three-level heat transfer spray tower(105)Flue gas it is high The equal cigarette section of warm heat transfer zone(4)It is interior and as cooling humidification flue gas(G), then it is up low through fume high-temperature heat transfer zone and flue gas respectively Through exhanst gas outlet section after warm heat transfer zone progress cooling and dehumidification(11)Exhaust opening discharge after turn into low-temperature smoke extraction(H).
2. three towers as claimed in claim 1 based on the circulation of boiler exhaust gas condensate heat-carrying unify heat-exchanger rig, in integration Spray tower structure in be integrated with the fume high-temperature heat exchange of a large amount of recovery condensates and its waste heat, flue gas that flue gas significantly cools it is low The direct contact type spray heat exchange mode of the three kinds of different characteristics of air warming and humidifying for dehumidification that temperature exchanges heat, air significantly heats up, its It is characterised by described three-level heat transfer spray tower(105)The heat exchange structure unified using three towers, it is divided into air heating from bottom to top Humidify area, fume high-temperature heat transfer zone, wherein flue gas low-temperature heat transfer zone three parts, air warming and humidifying area and fume high-temperature heat transfer zone Between by flue gas bottom of towe pond baseboard(13)It is completely separable, the equal cigarette section of fume high-temperature heat transfer zone in the middle part of spray column(4)Enter cigarette Mouth passes through smoke-intake pipe(3)With high-humidity gas fume(F)Communicate, flue gas is in equal cigarette section(4)The cooling reached close to saturation state humidifies cigarette Gas(G), equal cigarette section(4)Bottom be provided with flue gas bottom of towe pond(1), top then with high-temperature heat transfer section(5)Communicate, high temperature heat exchange Section(5)Top be provided with high temperature section spray equipment(6), high temperature section spray equipment(6)Top be provided with water wind part flow arrangement (7), water wind part flow arrangement(7)Top and low-temperature heat exchange section(8)Communicate, low-temperature heat exchange section(8)Top be provided with low-temperature zone Spray equipment(9), low-temperature zone spray equipment(9)Top be provided with flue gas humidity regulating device(10), smoke moisture regulation dress Put(10)Top and exhanst gas outlet section(11)Communicate, exhanst gas outlet section(11)The outlet flue and low-temperature smoke extraction communicated(H)Communicate, Low-temperature zone spray equipment(9)Water inlet through low temperature water-circulating pump(21)With air tower bottom pond(20)Low temperature exhaust heat water water outlet Mouth is connected, low-temperature zone spray equipment(9)Nozzle atomization shower water through low-temperature heat exchange section(8)Absorb heat and fall into water after significantly heating up Wind part flow arrangement(7), water wind part flow arrangement(7)Delivery port send out low temperature exhaust heat water water outlet(J), the delivery port and hot net water are pre- Hot plate changes(15)Heating side outlet be connected after again with air shower apparatus(17)Water inlet be connected, hot net water preheating table changes (15)Heating side outlet also with high temperature section spray equipment(6)Water inlet be connected, hot net water preheating table changes(15)Heated side Import is then through high temperature water-circulating pump(14)With flue gas bottom of towe pond(1)Bottom circulating water outlet be connected, hot net water preheating table changes (15)Heated side-entrance and heat supply network backwater intake(M)Communicate, hot net water preheating table changes(15)Heated side outlet with heat Net backwater water outlet(N)Communicate, flue gas bottom of towe pond(1)Top be provided with moisturizing import and with high temperature moisturizing(L)Adjusted with water quality Regulating device(12)And its water conditioner(K)Communicate, flue gas bottom of towe pond(1)Top be additionally provided with cigarette tower overflow pipe(2), it is empty Gas blowout shower device(17)Nozzle atomization shower water through air warming and humidifying section(18)Heat release and significantly cool after through equal wind section (19)Fall into air tower bottom pond(20), air tower bottom pond(20)Top be provided with moisturizing import and with low temperature moisturizing(O) Communicate, top is additionally provided with void tower overflow pipe(24), bottom is additionally provided with blow-off pipe(22), equal wind section(19)Air inlet in tower It is outer through blast pipe(25)With surrounding air(A)Communicate, in tower then with heat up air(B)Communicate, air outlet slit section(16)In tower Interior and heating humidifying air(C)Communicate, pressure fan is then passed through outside tower(103)With inlet air of boiler(D)Communicate, inlet air of boiler(D) Through boiler(101)Burner hearth and exhaust gases passes and stove in discharge fume(E)Communicate, equal cigarette section(4)Outside tower and high-humidity gas fume(F)Phase Logical, the cooling then with reaching close to saturation state in tower humidifies flue gas(G)Communicate, exhanst gas outlet section(11)Outlet flue with it is low Temperature smoke evacuation(H)Communicate.
3. three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying as claimed in claim 2, its It is characterised by described high-temperature heat transfer section(5), low-temperature heat exchange section(8), air warming and humidifying section(18)For flue gas or air and spray The countercurrent flow structure that water drenching composition is vertically arranged, wherein internal set filler.
4. three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying as claimed in claim 2, its It is characterised by described high-temperature heat transfer section(5), low-temperature heat exchange section(8), air warming and humidifying section(18)For flue gas or air and spray The countercurrent flow structure that water drenching composition is vertically arranged, wherein internal be not provided with filler and use dead band structure.
5. three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying as claimed in claim 2, its It is characterised by the exhanst gas outlet section on described spray column top(11)With low-temperature smoke extraction(H)Outlet flue communicate and form integral type Nicotinic acids spray column chimney structure, wherein outlet section(11)Diameter it is equal compared with the low-temperature heat exchange area of bottom or contracting It is small.
6. three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying as claimed in claim 2, its It is characterised by described water wind part flow arrangement(7)It is provided with current derived type structure and gas flows up passage.
7. three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying as claimed in claim 2, its Water wind part flow arrangement is not provided with spray column described in being characterised by(7), i.e. the part forms dead band structure, now no longer set With low temperature exhaust heat water water outlet(J)The water wind part flow arrangement communicated(7)Outlet pipe, under fall on the low temperature exhaust heat water of the dead band structure Continue traveling downwardly and through high temperature section spray equipment(6)Enter high-temperature heat transfer section afterwards(5).
8. three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying as claimed in claim 2, its It is characterised by described aeration water quality regulating device(12)With the water conditioner with regulation acid-base value, anti-corrosion, scale-inhibiting function(E)'s Supplement source communicates.
9. three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying as claimed in claim 2, its It is characterised by described high temperature section spray equipment(6), low-temperature zone spray equipment(9)And air shower apparatus(17)Both can be single Layer spray structure or N layers spray structure composition, wherein N>1.
CN201710802615.XA 2017-09-08 2017-09-08 Three towers unification heat-exchange method and device based on the circulation of boiler exhaust gas condensate heat-carrying Pending CN107559861A (en)

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CN113324260A (en) * 2021-04-01 2021-08-31 昊姆(上海)节能科技有限公司 Open type absorption and open type generation heat pump system and method for improving boiler efficiency

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