CN105258144B - A kind of fountain flue gas waste heat recovery apparatus - Google Patents
A kind of fountain flue gas waste heat recovery apparatus Download PDFInfo
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- CN105258144B CN105258144B CN201510679648.0A CN201510679648A CN105258144B CN 105258144 B CN105258144 B CN 105258144B CN 201510679648 A CN201510679648 A CN 201510679648A CN 105258144 B CN105258144 B CN 105258144B
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- flue gas
- flue
- heat
- heat exchanger
- electric heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The present invention relates to off-gas recovery technical field, disclose fountain flue gas waste heat recovery apparatus, including fume afterheat depth recovery unit and gas cleaning unit, the fume afterheat depth recovery unit includes main tower, First Heat Exchanger and electric heating pump group, water source is connected with the electric heating pump group and First Heat Exchanger respectively by water inlet pipe, the main tower includes Condensed water collection section and spray heat exchanging segment, flue gas enters the spray heat exchanging segment by flue, the First Heat Exchanger is arranged in the flue, the Condensed water collection section is connected by outlet pipe with the electric heating pump group, the gas cleaning unit includes the oxidation unit connected with the flue, heat supply water pipe is provided with the water inlet pipe between the First Heat Exchanger and the electric heating pump group.Fountain flue gas waste heat recovery apparatus provided by the invention can carry out classification recovery to fume afterheat, and the efficiency of heating surface is higher.
Description
Technical field
The present invention relates to off-gas recovery technical field, more particularly to a kind of fountain flue gas waste heat recovery apparatus, specifically
Be that a kind of can make full use of fume afterheat and simultaneously the fountain flue gas waste heat recovery apparatus of purifying smoke.
Background technology
Its exhaust gas temperature of the conventional natural gas boiler of domestic operation is typically at 150~250 DEG C at present.Flue gas will be raw after burning
The vapor for being about 20% into volume share, in theory 1Nm3Combustion of natural gas can generate 1.5Kg vapor.And 1Kg vapor
It is 2453KJ in the latent heat of vaporization of 20 DEG C of total condensation releases.So, 1Nm3The vapor of combustion of natural gas generation will contain about
3.6MJ heat.Physical sensible heat and the latent heat of vaporization in recovered flue gas, energy utilization rate can provide more than 10%, have weight
The energy-saving significance wanted.
The main reason for current common haze weather is formed is that the continued accumulation of fine particle has exceeded atmospheric air circulation energy
Power and carrying degree.NO in combustion of natural gas productXIt is PM2.5Important as precursors thing, therefore gas cleaning has important environmental protection
Meaning.
Existing waste heat recovery apparatus is that dividing wall type flue gas waste heat recovery equipment and direct contact type flue gas waste heat recovery are set
Standby, there is partition thermal resistance in dividing wall type flue gas waste heat recovery equipment, relatively low to recovery of latent heat ratio in flue gas, and equipment is prevented
Corruption requires high；Direct contact type flue gas waste heat recovery equipment heat and mass transfer coefficient is high, and recovery of latent heat ratio is high, but is confined to heat
The reinforcing of recovery, does not take measures for gas cleaning.Existing reclaimer does not utilize sufficiently to fume afterheat.
The content of the invention
(1) technical problems to be solved
The technical problem to be solved in the present invention is that existing dividing wall type flue gas waste heat recovery equipment has partition thermal resistance, to cigarette
Recovery of latent heat ratio is relatively low in gas, and requires high to equipment anticorrosion；Direct contact type flue gas waste heat recovery equipment is not directed to
The problem of gas cleaning takes measures, existing reclaimer do not utilize sufficiently to fume afterheat.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of fountain flue gas waste heat recovery apparatus, it includes cigarette
Gas waste heat depth recovery unit and gas cleaning unit, the fume afterheat depth recovery unit include main tower, the first heat exchange
Device and electric heating pump group, water source are connected with the electric heating pump group and First Heat Exchanger respectively by water inlet pipe, and the main tower includes
Condensed water collection section and spray heat exchanging segment, flue gas enter the spray heat exchanging segment by flue, and the First Heat Exchanger is set
In in the flue, the Condensed water collection section is connected by outlet pipe with the electric heating pump group, the gas cleaning unit
Including the oxidation unit connected with the flue, the water inlet pipe between the First Heat Exchanger and the electric heating pump group
On be provided with heat supply water pipe.
Preferably, the clean unit also includes being arranged at chemicals dosing plant on the outlet pipe, in the chemicals dosing plant
It is equipped with alkali lye.
Preferably, the oxidation unit is ozone generator.
Preferably, one end that the flue is arranged in the spray heat exchanging segment is provided with umbrella shape air deflector.
Preferably, packing layer and spray equipment are provided with the spray heat exchanging segment, described filler layer is arranged at the spray
Between shower device and the flue.
Preferably, described filler layer is corrugated filler plate.
Preferably, the main tower also includes corresponding to the demisting section that the spray heat exchanging segment is set, in the demisting section
It is provided with exhanst gas outlet.
Preferably, the Condensed water collection section is provided with overflow pipe on the main tower.
Preferably, the Condensed water collection section is provided with blow-off pipe on the main tower.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the following advantages that：In fountain flue gas waste heat recovery apparatus provided by the invention
Fume afterheat depth recovery unit include main tower, First Heat Exchanger and electric heating pump group, water source by water inlet pipe respectively with electricity
Heat pump group and First Heat Exchanger connection, main tower includes Condensed water collection section and spray heat exchanging segment, flue gas are entered by flue
Heat exchanging segment is sprayed, First Heat Exchanger is arranged in flue, and Condensed water collection section is connected by outlet pipe with electric heating pump group, flue gas
Clean unit includes the oxidation unit connected with flue, is provided with the water inlet pipe between First Heat Exchanger and electric heating pump group
Heat supply water pipe.Set fume afterheat depth recovery unit and flue gas net in fountain flue gas waste heat recovery apparatus provided by the invention
Change unit can carry out pollutant in classification recovery, flue gas to fume afterheat and purify, and make the recovery of fume afterheat depth and cigarette
Gas purification function cooperated integration can make full use of flue gas to take into account energy-conservation and environmentally friendly purpose in one；With simple in construction, operation
The advantages that facilitating.
Brief description of the drawings
Fig. 1 is the structural representation of the fountain flue gas waste heat recovery apparatus of the embodiment of the present invention one；
Fig. 2 is the structural representation of the fountain flue gas waste heat recovery apparatus of the embodiment of the present invention two.
In figure：1：Flue；2：Water inlet pipe；3：Ozone generator；4：Smoke inlet；5：Main tower；6：Umbrella shape water conservancy diversion
Device；7：Condensed water collection section；8：Packing layer；9：Spray heat exchanging segment；10：Spray equipment；11：Demisting section；12：Exhanst gas outlet；15：The
One heat exchanger；16：Second heat exchanger；17：Outlet pipe；18：Chemicals dosing plant；19：Water pump；20：Water injection pipe；21：Overflow pipe；22：
Blow-off pipe；25：Heat supply water pipe；26：Electric heating pump group.
Embodiment
In the description of the invention, unless otherwise indicated, " multiple " are meant that two or more；Term " on ",
" under ", "left", "right", " interior ", the orientation of the instruction such as " outer " or position relationship be based on orientation shown in the drawings or position relationship,
It is for only for ease of and describes the present invention and simplify to describe, rather than indicates or imply that signified machine or element must have specifically
Orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In the description of the invention, it is necessary to which explanation, unless otherwise clearly defined and limited, term " connected ", " connects
Connect " it should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or it is integrally connected；It can be machine
Tool connects or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary.For this area
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
Embodiment one
As shown in figure 1, fountain flue gas waste heat recovery apparatus provided in an embodiment of the present invention, it includes fume afterheat depth
Recovery unit and gas cleaning unit, the fume afterheat depth recovery unit include main tower 5, First Heat Exchanger 15 and second
Heat exchanger 16, water source are connected with second heat exchanger 16 and First Heat Exchanger 15 respectively by water inlet pipe 2, the main tower 5
Including Condensed water collection section 7 and spray heat exchanging segment 9, flue gas enters the spray heat exchanging segment 9 by flue 1, recovered flue gas
Latent heat, solution is stored in the Condensed water collection section 7 after heat exchange.The First Heat Exchanger 15 is arranged in the flue 1, is used
In the sensible heat of recovered flue gas.The Condensed water collection section 7 is connected by outlet pipe 17 with second heat exchanger 16, the second heat exchanger
The 16 heat supply network backwater being used in circulation solution preheating water inlet pipe 2, realize fume afterheat classification recovery.The gas cleaning unit bag
Include the oxidation unit 3 connected with the flue 1, the oxidation unit 3 in the present embodiment is ozone generator.
Set fume afterheat depth recovery unit and flue gas net in fountain flue gas waste heat recovery apparatus provided by the invention
Change unit can carry out pollutant in classification recovery, flue gas to fume afterheat and purify, and make the recovery of fume afterheat depth and cigarette
Gas purification function cooperated integration takes into account energy-conservation and environmentally friendly purpose in one；Have the advantages that simple in construction, easy to operate.
Heretofore described clean unit also includes the chemicals dosing plant 18 being arranged on the outlet pipe 17, the dosing dress
Put 18 and be built-in with alkali lye.Chemicals dosing plant 18 is the dosing tank of the alkali lye such as addition NaOH.NO in flue gasXThrough oxygen in flue 1
Change enters main tower 5, and alkali lye chemical absorbing and the segmentation purification that flue gas condensing physics absorbs are realized in main tower 5.The present invention
Gas cleaning mode be flue gas to be first passed through after the ozone oxidation of oxidation unit 3 with alkali liquor absorptions such as the NaOH of chemicals dosing plant 18
Purification style.Purification principle of absorption is ozone oxidation, and alkali lye chemical absorbing and flue gas condensing physics absorb.Chemicals dosing plant 18 is used
The NO in the acidic liquid and enhancing solution for neutralizing Condensed water collection section 7 are to flue gasXAbsorbability.
In order that flue gas is uniformly distributed in main tower 5, and the uniform heat exchange in heat exchanging segment 9, flue gas described in the present embodiment
One end that pipeline 1 is arranged in the spray heat exchanging segment 9 is provided with umbrella shape air deflector 6.Ozone caused by oxidation unit 3 passes through
Hole pipe, which is uniformly sprayed into flue 1, to be used to aoxidize the NO in smoke components.
Packing layer 8 and spray equipment 10 are provided with heretofore described spray heat exchanging segment 9, described filler layer 8 is arranged at
Between the spray equipment 10 and the flue 1.Packing layer 8 is the larger filler of specific surface area to increase flue gas and water
Heat exchange area.The packing layer 8 of the present invention is the heat exchange surface as flue gas, as long as shower water is uniformly sprayed at the table of packing layer 8
The temperature in face can obtain the heat transfer effect of excellent stabilization.Flow resistance in the present embodiment for flue gas in filler compares
Equilibrium, the problem of direct contact heat transfer there may be bias current and backflow in tower is occurred without, packing layer 8 described herein is adopted
Use corrugated filler plate.The spray droplet temperature of the spray equipment 10 is less than flue gas dew point temperature, and flue gas and spray droplet are in filling out
Condensed when being exchanged heat at the bed of material 8, condensate liquid will absorb NO in part of smokeX。
Main tower 5 described in the present embodiment also includes corresponding to the demisting section 11 that the spray heat exchanging segment 9 is set, demisting section
11 are arranged at top, and exhanst gas outlet 12 is provided with the demisting section 11.The heat exchanger includes the second heat exchanger 16 and first
Heat exchanger 15, the First Heat Exchanger 15 is dividing wall type heat exchanger, and is arranged in the flue 1.First Heat Exchanger 15
The sensible heat being only used in recovered flue gas, relatively low is required to material antiseptic.Water temperature is 40 DEG C in water inlet pipe 2, through the second heat exchanger 16
50 DEG C are heated to, then is heated to 65 DEG C by First Heat Exchanger 15 and is used for heating hot water supply.The spray heat exchanging segment 9 is used for back
The latent heat in flue gas is received, because solution rinses, reduces requirement for anticorrosion of the equipment to material to a certain extent.
Hot water after heat exchange is collected by Condensed water collection section 7, and the condensate of collection is because absorbing the NO in flue gasXIn acidity.Spray
There is condensate generation during heat exchange, therefore recirculated water will be on the increase.The present embodiment corresponds to the Condensed water collection on the main tower 5
Section 7 is provided with overflow pipe 21, i.e. overflow pipe 21 is arranged at the ullage of Condensed water collection section 7.When liquid level arrives in Condensed water collection section 7
During up to spilling water height, condensate will be discharged by overflow pipe 21.Heat exchange and clean unit module operation a period of time, it need to change molten
Liquid, the present invention are provided with blow-off pipe 22 on the main tower 5 corresponding to the Condensed water collection section 7, i.e. blow-off pipe 22 is arranged at
The bottom of main tower 5.
The fountain flue gas waste heat recovery apparatus provided in the present embodiment, in use, fume afterheat depth recovery unit and
Clean cold water is injected into Condensed water collection section 7 from water injection pipe 20 before clean unit operation.High-temperature flue gas is from dress as caused by boiler
Flue 1 to be put to enter in First Heat Exchanger 15, the flue gas in flue 1 carries out wall-type heat exchange with the water in water inlet pipe 2,
Discharge sensible heat.The ozone as caused by ozone generator 3 uniformly sprays into flue 1 and is sufficiently mixed with flue gas in oxidation smoke components
NO.Flue gas after oxidized is uniformly sent into main tower 5 by umbrella shape air deflector 6, is sprayed with spray equipment 10 in vaporific
Water particle carries out countercurrent heat-transfer mass transfer, the latent heat of vaporization in recovered flue gas, while carries out denitration purification to flue gas.Carried secretly after heat exchange
The low-temperature flue gas of small part small particle water particle is expelled to chimney after the demisting of demisting section 11 by exhaust opening 12.Hot water after heat exchange
Collected by Condensed water collection section 7, the condensate of collection is because absorbing the NO in flue gasXIn acidity.Hot water enters through outlet pipe 17 in condensate pond
Enter chemicals dosing plant 18 and add alkaline reagent, on the one hand neutralize the acidic materials in condensate, on the other hand excessive alkaline solution can
NO in flue gas when being sprayed with enhancingXDissolubility.Solution through agent-feeding treatment is sent into the second heat exchanger 16 and heat by water pump 19
Water backwater exchanges heat, and returning to spray equipment 10 by outlet pipe 17 again after cooling carries out spray completion circulation.Hot water backwater is second
Heat exchanger 16 heats up, then suitable by that can be supplied to the hot water after being further heated up installed in the First Heat Exchanger 15 of flue
Suitable therrmodynamic system.
In summary, the fume afterheat depth recovery unit bag in fountain flue gas waste heat recovery apparatus provided by the invention
Main tower, First Heat Exchanger and the second heat exchanger are included, water source is connected with the second heat exchanger and First Heat Exchanger respectively by water inlet pipe
Connect, main tower includes Condensed water collection section and spray heat exchanging segment, and flue gas enters spray heat exchanging segment, First Heat Exchanger by flue
It is arranged in flue, Condensed water collection section is connected by outlet pipe with the second heat exchanger, and gas cleaning unit includes and flue gas
The oxidation unit of pipeline communication.Set the recovery of fume afterheat depth single in fountain flue gas waste heat recovery apparatus provided by the invention
Member and gas cleaning unit can carry out pollutant in classification recovery, flue gas to fume afterheat and purify, and make fume afterheat deep
Degree recovery, in one, takes into account energy-conservation and environmentally friendly purpose with function of fuel gas purification cooperated integration；With simple in construction, easy to operate etc.
Advantage.
Further, the flow resistance for flue gas in filler is more balanced, and the present invention is stated packing layer and filled out using ripple
Flitch.
Embodiment two
Because the efficiency of heating surface of the second heat exchanger 16 does not have an efficiency high of electric heating pump group 26, the hot backwater temperature in water inlet pipe 2
Spend for 40 DEG C, be heated to 50 DEG C by the second heat exchanger 16, the supply temperature of domestic hot-water can't be reached.In the present embodiment
Second heat exchanger 16 is replaced with into electric heating pump group 26, the fume afterheat depth recovery unit includes main tower 5, First Heat Exchanger
15 and electric heating pump group 26, water source be connected respectively with the electric heating pump group 26 and First Heat Exchanger 15 by water inlet pipe 2, the king-tower
Body 5 includes Condensed water collection section 7 and spray heat exchanging segment 9, and flue gas enters the spray heat exchanging segment 9, the flue gas by flue 1
Clean unit includes the oxidation unit 3 connected with the flue 1, and the First Heat Exchanger 15 is arranged at the flue
In 1, the Condensed water collection section 7 is connected by outlet pipe 17 with the electric heating pump group 26.
And heat supply water pipe 25 is provided with the water inlet pipe 2 between electric heating pump group 26 and First Heat Exchanger 15, can will be through
The part for crossing the hot backwater that electric heating pump group 26 is heated to 55 DEG C is drawn for domestic hot-water supply from heat supply water pipe 25, another portion
Lease making, which crosses First Heat Exchanger 15 and is again heated to 70 DEG C, is used for heating hot water supply.
Fume afterheat can more be made full use of using electric heating pump group 26 and heat supply water pipe 25 so that returning in the present embodiment two
The receiving apparatus efficiency of heating surface is higher, more energy-conservation and environmental protection.It should be noted that electric heating pump group 26 is not limited only in the present embodiment,
Can also be the higher parts of other efficiencies of heating surface.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
- A kind of 1. fountain flue gas waste heat recovery apparatus, it is characterised in that：It is net including fume afterheat depth recovery unit and flue gas Change unit, the fume afterheat depth recovery unit includes main tower (5), First Heat Exchanger (15) and electric heating pump group (26), water Source is connected with the electric heating pump group (26) and First Heat Exchanger (15) respectively by water inlet pipe (2), and the main tower (5) includes solidifying Water collection section (7) and spray heat exchanging segment (9), flue gas by flue (1) enter it is described spray heat exchanging segment (9), described first Heat exchanger (15) is arranged in the flue (1), and the Condensed water collection section (7) passes through outlet pipe (17) and the electric heating pump Group (26) connects, and the gas cleaning unit includes the oxidation unit (3) connected with the flue (1), and described first changes Heat supply water pipe (25) is provided with the water inlet pipe (2) between hot device (15) and the electric heating pump group (26)；One end that the flue (1) is arranged in the spray heat exchanging segment (9) is bent downwardly, and is provided with umbrella shape air deflector (6)；Hot water in the Condensed water collection section (7) enters the chemicals dosing plant (18) equipped with alkaline reagent through outlet pipe (17), through alkali Property agent treatment hot water electric heating pump group (26) be sent into by water pump (19) exchanged heat with the water in water inlet pipe (2), after cooling Hot water spray equipment (10) returned to by outlet pipe (17) again sprayed.
- 2. fountain flue gas waste heat recovery apparatus as claimed in claim 1, it is characterised in that：In the spray heat exchanging segment (9) Packing layer (8) and spray equipment (10) are provided with, described filler layer (8) is arranged at the spray equipment (10) and the fume pipe Between road (1).
- 3. fountain flue gas waste heat recovery apparatus as claimed in claim 2, it is characterised in that：Described filler layer (8) is ripple Filler plate.
- 4. fountain flue gas waste heat recovery apparatus as claimed in claim 1, it is characterised in that：The main tower (5) also includes Corresponding to the demisting section (11) of spray heat exchanging segment (9) setting, exhanst gas outlet (12) is provided with the demisting section (11).
- 5. fountain flue gas waste heat recovery apparatus as claimed in claim 1, it is characterised in that：It is corresponding on the main tower (5) The Condensed water collection section (7) is provided with overflow pipe (21).
- 6. fountain flue gas waste heat recovery apparatus as claimed in claim 1, it is characterised in that：It is corresponding on the main tower (5) The Condensed water collection section (7) is provided with blow-off pipe (22).
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| CN201510679648.0A CN105258144B (en) | 2015-10-19 | 2015-10-19 | A kind of fountain flue gas waste heat recovery apparatus |
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| CN201510679648.0A CN105258144B (en) | 2015-10-19 | 2015-10-19 | A kind of fountain flue gas waste heat recovery apparatus |
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| CN105258144B true CN105258144B (en) | 2017-12-01 |
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| CN107305015A (en) * | 2016-04-20 | 2017-10-31 | 北京源深节能技术有限责任公司 | Chimney component |
| CN106268235A (en) * | 2016-09-28 | 2017-01-04 | 中石化节能环保工程科技有限公司 | Oil field fuel oil injection boiler tail gas desulfurization denitration processing system |
| CN107101218B (en) * | 2017-03-17 | 2019-02-05 | 清华大学 | The compact flue gas depth waste-heat recovery device of low-resistance |
| TWI658242B (en) * | 2018-02-22 | 2019-05-01 | 陳建銘 | Method for using ozone to intercept precursors of smog to suppress smog synthesis |
| CN108654359A (en) * | 2018-05-04 | 2018-10-16 | 梁廷洲 | A kind of SCR denitration catalysis reaction smoke temperature height control device |
| CN108731012B (en) * | 2018-05-30 | 2020-07-24 | 河北华强科技开发有限公司 | Device and method for eliminating wet smoke plume of coal-fired power plant |
| TWI708915B (en) * | 2018-09-28 | 2020-11-01 | 魏榮宗 | Exhaust gas purification device |
| CN111589290B (en) * | 2020-05-27 | 2024-02-20 | 新疆天富环保科技有限公司 | Energy-saving type boiler tail gas purification system and method |
| CN112254444B (en) * | 2020-10-15 | 2022-02-25 | 江苏大学 | Vehicle drying and sterilizing system and method |
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| CN105258144A (en) | 2016-01-20 |
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