CN208222554U - Gas fired-boiler fume afterheat, which is utilized, removes system with white haze - Google Patents
Gas fired-boiler fume afterheat, which is utilized, removes system with white haze Download PDFInfo
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- CN208222554U CN208222554U CN201821391684.2U CN201821391684U CN208222554U CN 208222554 U CN208222554 U CN 208222554U CN 201821391684 U CN201821391684 U CN 201821391684U CN 208222554 U CN208222554 U CN 208222554U
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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
- 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
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Abstract
It is utilized the utility model discloses a kind of gas fired-boiler fume afterheat and removes system with white haze, it includes gas fired-boiler and burner, the outlet flue of gas fired-boiler is connected with main, branch flue, the deep exploitation device that has surplus heat, air/smoke condensation by mixing dehumidification device and heating humidity reducing device are connected on flue collector, waste heat deep exploitation device and air/smoke condensation by mixing dehumidification device are connect with device for recycling condensed water, and branch flue is connect with air/smoke mixing preheating device.It utilizes its purpose is to providing a kind of gas fired-boiler fume afterheat and removes system with white haze, the purpose for saving combustion gas, reducing emission reduction, recycling water resource may be implemented.
Description
Technical field
The utility model relates to natural gas boiler energy-conserving and emission-cutting technologies and flue gas to clean emissions field, more particularly to one
Kind can be realized simultaneously the gas fired-boiler fume afterheat that energy conservation, low nitrogen emission reduction and water resource recycle and utilize and white haze removing system
System.
Background technique
With China's industrialization, the deep propulsion of urbanization, energy consumption continues to increase, and it is tight to reduce atmosphere pollution situation
High, atmospheric environment problem becomes increasingly conspicuous.The coal that Beijing takes the lead in completing heat source of heat-supply system changes gas, realizes Beijing City without coal
Change, the content of flue dust and sulphur is under control in air, and air quality has obtained very big improvement.Subsequent Tianjin, Hebei, Shanxi,
Xinjiang etc. also constantly promotes coal to change the process of gas mainly for thermal region, and proportion is increasingly in heating field for gas fired-boiler
Greatly, due to the advantages that its is small in size, high degree of automation, the high thermal efficiency, by as preferred in terms of the heat supply of urban area.
The advantage of gas fired-boiler is obvious, but also exposes some defects in use:
Due to natural gas constituent with CH4 etc. for main component, will form a large amount of H2O, H2O in combustion
A large amount of heat is absorbed in vaporescence, while exhaust gas temperature is generally 160 DEG C or so, also bring a large amount of heat waste
It loses.
In combustion, under the action of high temperature, generate NOX is about 200ppm to natural gas, as one of atmosphere pollution,
Have become one of main control gas.
Since the vapor ratio in flue gas is higher, cold air fast liquefying is encountered in discharge process and forms small water droplet,
Generate white haze phenomenon.Nitrogen oxides in vapor and flue gas in white haze etc. will become the matchmaker for forming haze under complex environment
It is situated between.
By the analysis to combustion gas composition, can know, 1m3It can produce about 1.55kg vapor after combustion of natural gas,
That is the steam vapour amount that per ton of boiler is about discharged daily is about 2.6 tons, causes the significant wastage of water resource.
Utility model content
It utilizes to remove with white haze the technical problem to be solved by the present invention is to provide a kind of gas fired-boiler fume afterheat and is
System, the system may be implemented to reduce nitrogen oxides yield, and preheated air temperature recycles obvious heat of smoke and latent heat, flue gas
Middle vapor condensing recovery, purifying smoke reduce humidity of flue gas and relative humidity, weaken or white haze is avoided to generate, and realize section
The purpose for saving combustion gas, reducing emission reduction, recycling water resource.
The utility model gas fired-boiler fume afterheat, which is utilized, removes system with white haze, including interconnected gas fired-boiler and
Burner, the outlet flue of the gas fired-boiler are connected with flue collector and branch flue, and the flue collector is connect with chimney, the main cigarette
The deep exploitation device that has surplus heat, air/smoke condensation by mixing dehumidification device and heating humidity reducing device are sequentially connected on road, it is described remaining
Hot deep exploitation device and air/smoke condensation by mixing dehumidification device are connect with a device for recycling condensed water, described remaining
Hot deep exploitation device is exchanged heat by boiler blow-down water with the flue gas for flowing through waste heat deep exploitation device, the air/smoke
Condensation by mixing dehumidification device is exchanged heat by outdoor air with the flue gas for flowing through air/smoke condensation by mixing dehumidification device, institute
Branch flue is stated to connect by heating humidity reducing device and after the flue gas heat exchange flowed through in it with an air/smoke mixing preheating device
It connects, the air inlet of the air/smoke mixing preheating device is used to be passed through air, the air/smoke mixing preheating device
Air outlet is connect by air hose with the burner, is provided with wind pressure measuring meter on the air hose.
The utility model gas fired-boiler fume afterheat, which is utilized, removes system with white haze, wherein the waste heat deep exploitation device
Inside it is equipped with two exhaust gases passes and two boiler blow-down water channels, the exhaust gases passes and boiler blow-down water channel arranged crosswise, two
The exhaust gases passes are connected to a condensation water channel, and the condensation water channel is connected to the condensate water recovery device.
The utility model gas fired-boiler fume afterheat, which is utilized, removes system with white haze, wherein the heating humidity reducing device is by aluminium
Making sheet piece vacuum welding forms, and the side of the aluminum plate is used for the low temperature cigarette by coming from the dehumidification by condensation device
Gas, the other side of the aluminum plate are used for the high-temperature flue gas by coming from the branch flue.
The utility model gas fired-boiler fume afterheat, which is utilized, removes system with white haze, wherein setting in the heating humidity reducing device
There are two valves, and two valves are respectively the first valve and the second valve, are opened on the heating humidity reducing device wall between two valves
It equipped with a sliding channel, is slidingly sealed in the sliding channel and a U-shaped heat exchange head is installed, the U-shaped heat exchange head is connected to institute
It states on branch flue, the air inlet of the U-shaped heat exchange head is connect by the branch flue with the gas fired-boiler, the U-shaped heat exchange
The gas outlet of head is connect by the branch flue with the air/smoke mixing preheating device.
The utility model gas fired-boiler fume afterheat, which is utilized, removes system with white haze, wherein the end of the U-shaped heat exchange head
Equipped with fin.
The utility model gas fired-boiler fume afterheat, which is utilized, is this with white haze removing system difference from prior art
Utility model passes sequentially through boiler blow-down water and outdoor cold air and carries out cool-down dehumidification, and the height for passing through boiler to boiler smoke
Warm flue gas carries out heat temperature raising to the flue gas after cooling, and can be realized reduces nitrogen oxides yield, preheated air temperature, recycling
Using obvious heat of smoke and latent heat, vapor condensing recovery, purifying smoke in flue gas reduce humidity of flue gas and relative humidity, cut
It is weak or white haze is avoided to generate, realize the purpose for saving combustion gas, reducing emission reduction, recycling water resource.
The utility model is described in further detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is that the gas fired-boiler fume afterheat in the utility model utilizes the structural schematic diagram that system is removed with white haze；
Fig. 2 is the structural schematic diagram of the heating humidity reducing device in the utility model.
Specific embodiment
As shown in Figure 1, it includes mutually interconnecting that the gas fired-boiler fume afterheat in the utility model, which is utilized with white haze removing system,
Logical gas fired-boiler 2 and burner 1, the outlet flue of the gas fired-boiler 2 are connected with flue collector and branch flue, the flue collector with
Chimney connects, and is sequentially connected the deep exploitation device 3 that has surplus heat, 4 and of air/smoke condensation by mixing dehumidification device on the flue collector
Heat up humidity reducing device 5, and the waste heat deep exploitation device 3 and air/smoke condensation by mixing dehumidification device 4 are returned with a condensed water
It receives and is connected using device, the waste heat deep exploitation device 3 passes through boiler blow-down water and the flue gas for flowing through waste heat deep exploitation device 3
It exchanges heat, the air/smoke condensation by mixing dehumidification device 4 is removed by outdoor air with air/smoke condensation by mixing is flowed through
The flue gas of wet device 4 exchanges heat, the branch flue by heating humidity reducing device 5 and with after the flue gas heat exchange that flows through in it with one
Air/smoke mixing preheating device 6 connects, and the air inlet of the air/smoke mixing preheating device 6 is used to be passed through air, institute
The air outlet for stating air/smoke mixing preheating device is connect by air hose with the burner 1, is provided with wind pressure on the air hose
Measuring device 12.Wind pressure measuring meter 12 is for measuring the pressure that flue gas mixes with air gas, to be adjusted into combustion gas
The air quantity of boiler 2 enables the natural gas full combustion for entering boiler.
Gas fired-boiler fume afterheat in the utility model, which is utilized, removes system with white haze, wherein the waste heat deep exploitation
Two exhaust gases passes and two boiler blow-down water channels, the exhaust gases passes and boiler blow-down water channel arranged crosswise are equipped in device 3,
Two exhaust gases passes are connected to a condensation water channel, and the condensation water channel is connected to the condensate water recovery device 7.
Gas fired-boiler fume afterheat in the utility model, which is utilized, removes system with white haze, wherein the heating humidity reducing device
5 are formed by aluminum plate vacuum welding, and the side of the aluminum plate is used for low by coming from the dehumidification by condensation device
Warm flue gas, the other side of the aluminum plate are used for the high-temperature flue gas by coming from the branch flue.
As shown in Fig. 2, the structure of the heating humidity reducing device 5 in the utility model can also be as described below: the heating drop
Valve there are two setting in wet device 5, two valves are respectively the first valve 11 and the second valve 8, the heating between two valves
A sliding channel is offered on 5 wall of humidity reducing device, is slidingly sealed in the sliding channel and a U-shaped heat exchange head 9, the U are installed
Type heat exchange head 9 is connected on the branch flue, and the air inlet of the U-shaped heat exchange head 9 passes through the branch flue and the gas-fired boiler
Furnace 2 connects, and the gas outlet of the U-shaped heat exchange head 9 is connect by the branch flue with the air/smoke mixing preheating device 6.
Gas fired-boiler fume afterheat in the utility model, which is utilized, removes system with white haze, wherein the U-shaped heat exchange head 9
End is equipped with fin 10, is capable of increasing heat exchange area in this way, improves heat exchange efficiency.
The method with white haze removing system is utilized using above-mentioned gas fired-boiler fume afterheat, comprising the following steps:
The first valve 11 is opened, the second valve 8 is closed,
It controls U-shaped heat exchange head 9 after 2-5 seconds to move into heating humidity reducing device 5, to U-shaped heat exchange head 9 in heating wet down
After being placed 20-30 seconds in device 5, controls U-shaped heat exchange head 9 and removes heating humidity reducing device 5,
The second valve 8 is opened, the flue gas after making cooling enters in air/smoke mixing preheating device 6,
After the flue gas in the humidity reducing device 5 that heats up is completely into air/smoke mixing preheating device 6, the first valve is opened
11, the second valve 8 is closed, above-mentioned each step is repeated.
Control element in above-mentioned each method belongs to prior art, therefore to its structure, it will not go into details at this.No
It is disconnected to repeat above method, constantly by the high-temperature flue gas that is come out from boiler to after cool-down dehumidification in heating humidity reducing device 5
Low-temperature flue gas heated, to eliminate white haze phenomenon.
The working principle of the utility model is as follows:
Natural gas is mixed and burned in gas fired-boiler 2 by burner 1 with air/smoke mixing preheating device 6, by
Containing a large amount of vapor (close saturation) in combustion air, heat absorption evaporation absorbs heat in combustion, and due to mixing after
Air oxygen content it is low, so that burning situation is in hypoxemia low-temperature condition, hinder the generation of thermal NO, thus by
Source reduces the production quantity of nitrogen oxides, realizes the purpose that low azo-cycle is protected.But the heat due to absorbing in flue gas increases,
The thermal efficiency for causing boiler itself has slight drop, and general who has surrendered is compensated in waste heat deep exploitation device 3 under this part.
The heat generated after the burning of gas fired-boiler 2, about 90% is absorbed by hot water in boiler, the big portion in after-heat
It point then by smoke absorption, is discharged by boiler tail, wherein 80-85% through flue enters waste heat deep exploitation device to the flue gas of discharge
3, it is made of two exhaust gases passes, two aquaporins and a condensation water channel inside the device, flue gas and boiler blow-down water carry out
Heat exchange, while flue-gas temperature is reduced to 50 DEG C or so by 160 DEG C, flue gas exit temperature is lower than dew-point temperature (about 57 DEG C), flue gas
Middle sensible heat and latent heat are transferred in boiler water system, realize that the condensing recovery of fume afterheat utilizes.Simultaneously as temperature is lower than dew
Temperature is put, Water vapor condensation becomes condensed water in flue gas, is discharged into condensate water recovery device 7 by condensate pipe and is collected processing
It recycles, realizes the recycling of water resource in flue gas.
By the flue gas of the outlet of fume afterheat deep exploitation device 3 discharge, temperature is lower than dew-point temperature, in a saturated state
(relative humidity 100%), subsequently enters air/smoke condensation by mixing dehumidification device 4, which is provided with air/smoke mixing
Device, the motive force generated by flue gas overbottom pressure, the outdoor air and saturated flue gas that will be fed into the device are sufficiently mixed, by
It is lower in winter outdoor temperature, after being sufficiently mixed, mixed gas fast cooling (temperature is down to 25-30 DEG C), due to enter air/
The flue gas of flue gas condensation by mixing dehumidification device 4 is saturated gas, and temperature further decreases after mixing, and more condensed waters are precipitated,
And the moisture in the further recovered flue gas of device for recycling condensed water 7 is entered by condensate pipe, realizing water resource recycling
While utilization, the moisture being also stripped of in flue gas dehumidifies by waste heat deep exploitation device 3 and air/smoke condensation by mixing
After device 4,70% or more moisture is recycled in flue gas.
By the flue gas of air/smoke condensation by mixing dehumidification device 4, most moisture is removed, but flue gas is not satisfied yet
And state, due to (0 DEG C or so) of outdoor temperature lower than flue-gas temperature (25-30 DEG C) so still being had as long as having temperature drop brighter
Aobvious white haze generates, and in order to eliminate white haze, the utility model devises heating humidity reducing device 5.It is removed by air/smoke condensation by mixing
Flue gas (about 160 of the low temperature saturated flue gas that wet device 4 is discharged in heating humidity reducing device 5 with the 15%-20% of boiler discharge
DEG C) carry out heat exchange.The humidity reducing device 5 that heats up is completed by aluminum plate vacuum welding, and plate side is the low temperature after cool-down dehumidification
Flue gas, side are the high-temperature flue gas being discharged by boiler, and two parts flue gas carries out wall-type heat exchange, low-temperature flue gas temperature by aluminium sheet
It increases, relative humidity reduces, and becomes unsaturated state, the flue gas and initial flue gas of discharge heating humidity reducing device 5 from saturation state
(flue gas of boiler discharge) compares, and temperature is low, water content is low, relative humidity is low, due to small, the water capacity with the temperature difference of outdoor air
It is low, so being hardly formed white haze when atmosphere is discharged, realize the purpose for eliminating white haze.
The structure of heating humidity reducing device 5 in the utility model can also be as described below: setting in the heating humidity reducing device 5
There are two valves, and two valves are respectively the first valve 11 and the second valve 8,5 wall of heating humidity reducing device between two valves
On offer a sliding channel, be slidingly sealed in the sliding channel and a U-shaped heat exchange head 9 be installed, the U-shaped heat exchange head 9 connects
It connects on the branch flue, the air inlet of the U-shaped heat exchange head 9 is connect by the branch flue with the gas fired-boiler 2, described
The gas outlet of U-shaped heat exchange head 9 is connect by the branch flue with the air/smoke mixing preheating device 6.By boiler discharge
High-temperature flue gas flow through it is U-shaped heat exchange head 9 with flow through heat up humidity reducing device 5 in cool-down dehumidification after low-temperature flue gas exchange heat.
And the high-temperature flue gas of heat exchange is participated in heating humidity reducing device 5, flue-gas temperature reduces after heat exchange, but smoke temperature (70-
80 DEG C) still for higher than dew-point temperature (57 DEG C), absolute moisture content is unchanged, which is entered after cooling by flue
Air/smoke mixing preheating device 6, is mixed with air needed for burner 1 in the apparatus, mixed atmosphere temperature rising,
Realize the purpose of preheating, and by mixing, air condition changes, oxygen content decline, water capacity increases, part mixing
Air enters through burner 1 and enters gas fired-boiler 2, carries out low nitrogen burning, and realization recycles.
In short, the utility model can realize following effect:
(1) flame combustion temperature is reduced, the generation of nitrogen oxides is reduced from source；
(2) heat of itself in the heat and flue gas that combustion process absorbs will be reduced and pass through 3 turns of waste heat deep exploitation device
Boiler system is moved to, conventional low nitrogen burning equipment belt is avoided and comes boiler efficiency reduction and heat loss due to exhaust gas；
(3) pass through waste heat deep exploitation device 3, air/smoke condensation by mixing dehumidification device 4, condensation water recovery and use dress
The water in 7 recovered flue gas is set, realizes the recycling of water resource；
(4) it is realized by waste heat deep exploitation device 3, air/smoke condensation by mixing dehumidification device 4, heating humidity reducing device 5
Eliminate the purpose of smoke evacuation white haze；
(5) purpose for realizing pre- hot fume is mixed with air by flue gas, improves efficiency of combustion；
(6) system has that high efficiency (105% or more the thermal efficiency), (nitrogen oxides and vapor substantially drop for low emission
It is low), high-recovery (heat and water resource recycling) the characteristics of.
The utility model passes sequentially through boiler blow-down water and outdoor cold air and carries out cool-down dehumidification to boiler smoke, and logical
The high-temperature flue gas for crossing boiler carries out heat temperature raising to the flue gas after cooling, and can be realized reduces nitrogen oxides yield, and preheating is empty
Temperature degree, recycles obvious heat of smoke and latent heat, vapor condensing recovery, purifying smoke in flue gas, reduce humidity of flue gas and
Relative humidity weakens or white haze is avoided to generate, and realizes the purpose for saving combustion gas, reducing emission reduction, recycling water resource.
The utility model can be while recovered flue gas sensible heat and latent heat, the air that preheated burning device 1 burns, and reduces nitrogen
The generation of oxide, the vapor in condensing recovery flue gas, purifying smoke, reduce water capacity and relative humidity in flue gas, weaken
Or it avoids generating white haze phenomenon.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various changes and improvements that the technical solution of utility model is made should all fall into the protection that the utility model claims book determines
In range.
Claims (1)
1. a kind of gas fired-boiler fume afterheat, which is utilized, removes system with white haze, it is characterised in that: including interconnected gas-fired boiler
Furnace and burner, the outlet flue of the gas fired-boiler are connected with flue collector and branch flue, and the flue collector is connect with chimney, described
The deep exploitation device that has surplus heat, air/smoke condensation by mixing dehumidification device and heating humidity reducing device, institute are sequentially connected on flue collector
It states waste heat deep exploitation device and air/smoke condensation by mixing dehumidification device is connect with a device for recycling condensed water, institute
Waste heat deep exploitation device is stated to exchange heat by boiler blow-down water with the flue gas for flowing through waste heat deep exploitation device, the air/
Flue gas condensation by mixing dehumidification device is changed by outdoor air with the flue gas for flowing through air/smoke condensation by mixing dehumidification device
Heat, the branch flue by heating humidity reducing device and mix pre- hot charging with an air/smoke after the flue gas heat exchange flowed through in it
Connection is set, the air inlet of the air/smoke mixing preheating device is used to be passed through air, and the air/smoke mixes pre- hot charging
The air outlet set is connect by air hose with the burner, is provided with wind pressure measuring meter on the air hose,
Two exhaust gases passes and two boiler blow-down water channels, the exhaust gases passes and pot are equipped in the waste heat deep exploitation device
Furnace backwater channel arranged crosswise, two exhaust gases passes are connected to a condensation water channel, the condensation water channel with it is described
Condensate water recovery device connection,
The heating humidity reducing device is formed by aluminum plate vacuum welding, and the side of the aluminum plate is used for by from described cold
The low-temperature flue gas that solidifying dehumidification device comes, the other side of the aluminum plate are used for the high temperature cigarette by coming from the branch flue
Gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821391684.2U CN208222554U (en) | 2018-08-28 | 2018-08-28 | Gas fired-boiler fume afterheat, which is utilized, removes system with white haze |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821391684.2U CN208222554U (en) | 2018-08-28 | 2018-08-28 | Gas fired-boiler fume afterheat, which is utilized, removes system with white haze |
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| Publication Number | Publication Date |
|---|---|
| CN208222554U true CN208222554U (en) | 2018-12-11 |
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ID=64506151
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821391684.2U Active CN208222554U (en) | 2018-08-28 | 2018-08-28 | Gas fired-boiler fume afterheat, which is utilized, removes system with white haze |
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| CN (1) | CN208222554U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579008A (en) * | 2019-01-07 | 2019-04-05 | 清华大学 | The warm and humid coupling gas fired-boiler low nitrogen burning system of one kind and operation method |
| CN111964042A (en) * | 2020-08-14 | 2020-11-20 | 河南中烟工业有限责任公司 | Energy-saving smoke exhaust system of gas boiler |
-
2018
- 2018-08-28 CN CN201821391684.2U patent/CN208222554U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579008A (en) * | 2019-01-07 | 2019-04-05 | 清华大学 | The warm and humid coupling gas fired-boiler low nitrogen burning system of one kind and operation method |
| CN109579008B (en) * | 2019-01-07 | 2024-05-10 | 清华大学 | Low-nitrogen combustion system of temperature-humidity coupled gas-fired boiler and operation method |
| CN111964042A (en) * | 2020-08-14 | 2020-11-20 | 河南中烟工业有限责任公司 | Energy-saving smoke exhaust system of gas boiler |
| CN111964042B (en) * | 2020-08-14 | 2022-06-21 | 河南中烟工业有限责任公司 | Energy-saving smoke exhaust system of gas boiler |
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