CN206488264U - A kind of flue gas waste heat recovery system of unequal arrangement - Google Patents
A kind of flue gas waste heat recovery system of unequal arrangement Download PDFInfo
- Publication number
- CN206488264U CN206488264U CN201720142002.3U CN201720142002U CN206488264U CN 206488264 U CN206488264 U CN 206488264U CN 201720142002 U CN201720142002 U CN 201720142002U CN 206488264 U CN206488264 U CN 206488264U
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- CN
- China
- Prior art keywords
- heat recovery
- flue gas
- waste heat
- gas waste
- flue
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of flue gas waste heat recovery system of unequal arrangement, suitable for coal unit flue gas heat recovery, corresponding waste-heat recovery device area is determined according to the Gas Parameters in corresponding flue, the waste-heat recovery device in each flue can be made to operate under design conditions, and the unbalanced degree of flue gas flow in different flues can be reduced.The utility model can effectively improve the flue gas flow in the amount of energy saving of fume afterheat, and each flue of appropriate balance, reduce total flue gas resistance.
Description
【Technical field】
The utility model belongs to energy-conserving and environment-protective field, and in particular to a kind of flue gas waste heat recovery system of unequal arrangement.
【Background technology】
Flue gas waste heat recovery apparatus is mounted in the heat transmission equipment between air preheater and desulfurizing tower entrance, has become state
Interior Large-scale fire-electricity unit reduction exhaust gas temperature, the important auxiliary equipment for carrying out flue gas waste heat recovery.The current country is in air preheat
When installing flue gas waste heat recovery apparatus additional between device and deduster, the area all same of the flue gas recovery device in each flue.But dedusting
Have that flue-gas temperature is uneven, the unbalanced phenomenon of flue gas flow between each flue of device entrance, under normal circumstances the cigarette of center-aisle
The flue-gas temperature in road is high, flue gas flow is big, and the flue-gas temperature of both sides flue is low and flow is small.Thus flue gas waste heat recovery is caused to fill
Put waste-heat recovery device area in the off-design operating mode in actual motion, the flue that flue gas flow is big, flue-gas temperature is high less than normal,
Cause the waste-heat recovery device exit gas temperature under actual motion middle and high load working condition high compared with design load, waste-heat recovery device fortune
Row is less than design load in poorly efficient area, energy-saving effect；Waste-heat recovery device area is inclined in the flue that flue gas flow is small, flue-gas temperature is low
Greatly, cause that the waste-heat recovery device water effluent amount in actual motion in the flue is small, the passage waste-heat recovery device area is set
Meter is bigger than normal so that the channel resistance increases, and can cause the increase of air-introduced machine power consumption.
【Utility model content】
The purpose of this utility model is to overcome above-mentioned deficiency present in existing design, propose a kind of unequal arrangement
Flue gas waste heat recovery system.
To reach above-mentioned purpose, the utility model is achieved using following technical scheme：
A kind of flue gas waste heat recovery system of unequal arrangement, including air preheater and deduster；Air preheater
Exhanst gas outlet and deduster between be connected by some flues, flue gas waste heat recovery dress is respectively arranged in each flue
Put；Each flue gas waste heat recovery apparatus water inlet is all connected to the outlet of the variable frequency pump for carrying out coarse adjustment to inflow.
The utility model, which is further improved, to be：
The entrance of deduster is provided with four flues.
The first flue gas waste heat recovery apparatus, the second flue gas waste heat recovery apparatus, the 3rd flue gas are set gradually in four flues
Waste-heat recovery device and the 4th flue gas waste heat recovery apparatus.
The ratio that the area of four flue gas waste heat recovery apparatus accounts for the fume afterheat gross area is followed successively by 20%~25%, 25%
~30%, 25%~30%, 20%~25%.
The water inlet of each flue gas waste heat recovery apparatus is respectively arranged to the pneumatic control valve of fine tuning inflow.
The delivery port of each flue gas waste heat recovery apparatus, which is converged in same pipeline, to flow back.
Compared with prior art, the utility model has the advantages that：
The utility model is filled according to the adaptable waste heat recovery of flue-gas temperature, flue gas flow arrangement correspondence arrangement in each flue
Area is put, on the premise of cost is not increased, it is ensured that flue gas waste heat recovery apparatus is operated in design work in actual motion
Under condition, the amount of energy saving of flue gas waste heat recovery apparatus is improved.Pass through variable frequency pump and waste-heat recovery device import pneumatic control valve
The adjustment that becomes more meticulous to waste-heat recovery device inflow in different flues can be achieved in regulation, can ensure waste-heat recovery device import
Water temperature, outlet cigarette temperature are operated under design conditions, so that waste-heat recovery device is run near design conditions.Flue gas stream
Waste-heat recovery device area is big in amount flue bigger than normal, and corresponding resistance is larger；And flue gas flow waste heat recovery less than normal in flue
Device, corresponding resistance is smaller, so as to reduce the inequality extent of flow between each flue, each flue can be made to enter in electric precipitation
Exhaust gas volumn be more uniformly distributed, have certain benefit to the raising of efficiency of dust collection.The utility model is compared to current existing equilibrium
The waste-heat recovery device of arrangement, can be reduced due to caused by the installing additional of waste-heat recovery device on flue gas resistance to a certain extent
Increasing degree degree, the amplification of air-introduced machine consumption rate reduces therewith.
Generally speaking, the utility model proposes a kind of unequal arrangement waste-heat recovery device compared under prior art
The waste-heat recovery device of equivalent arrangements, amount of energy saving can improve 5%~10%.
【Brief description of the drawings】
Fig. 1, Fig. 2 are schematic diagrames of the present utility model.
Wherein：1- air preheaters；The flue gas waste heat recovery apparatus of 2- first；The flue gas waste heat recovery apparatus of 3- second；4-
Three flue gas waste heat recovery apparatus；The flue gas waste heat recovery apparatus of 5- the 4th；6- dedusters；7- variable frequency pumps；8- pneumatic control valves.
【Embodiment】
The utility model is described in further detail below in conjunction with the accompanying drawings：
Referring to Fig. 1 and Fig. 2, the flue gas waste heat recovery system of the unequal arrangement of the utility model, including air preheater 1 with
And deduster 6；It is connected between the exhanst gas outlet of air preheater 1 and deduster 6 by some flues, in each flue respectively
Arrange a flue gas waste heat recovery apparatus；Each flue gas waste heat recovery apparatus water inlet is all connected to thick for being carried out to inflow
In the outlet of the variable frequency pump 7 of tune.The entrance of deduster 6 is provided with four flues.Set gradually in four flues more than the first flue gas
Heat reclamation device 2, the second flue gas waste heat recovery apparatus 3, the 3rd flue gas waste heat recovery apparatus 4 and the 4th flue gas waste heat recovery dress
Put 5.The area of four flue gas waste heat recovery apparatus account for the fume afterheat gross area ratio be followed successively by 20%~25%, 25%~
30%th, 25%~30%, 20%~25%.The water inlet of each flue gas waste heat recovery apparatus is respectively arranged to fine tuning water inlet
The pneumatic control valve 8 of amount.The delivery port of each flue gas waste heat recovery apparatus, which is converged in same pipeline, to flow back.
Principle of the present utility model：
When the utility model arranges flue gas waste heat recovery apparatus between air preheater and deduster entrance, when deduster enters
When mouth is four flues, the area of the flue gas waste heat recovery apparatus in corresponding flue is determined according to the size of flow in each flue,
First since the side, second, the 3rd, the area of waste-heat recovery device accounts for the fume afterheat gross area in the 4th flue
Ratio be followed successively by 20%~25%, 25%~30%, 25%~30%, 20%~25%；The heat exchange of waste-heat recovery device always
Area is determined according to the flue gas flow design under unit rated loan condition.The total inlet channel of flue gas waste heat recovery apparatus
Flue gas waste heat recovery apparatus import in 1 variable frequency pump of upper outfit, each flue is each equipped with 1 pneumatic control valve, by becoming
Frequency pump and pneumatic control valve can realize in each flue in waste-heat recovery device water regulation.
As illustrated in fig. 1 and 2, exported in air preheater 1 and arrange that fume afterheat is returned in four flues between the entrance of deduster 6
Receiving apparatus, the area of waste-heat recovery device is according to flue-gas temperature, flow and the cigarette under rated loan condition in correspondence gas approach
Gas acid dew point, which is integrated, to be determined, deduster is entered after flue gas waste heat recovery apparatus.Match somebody with somebody on the total inlet channel of waste-heat recovery device
A standby variable frequency pump 7, coarse adjustment is carried out to the inflow of waste-heat recovery device；It is respectively arranged on the inlet channel of waste-heat recovery device
One pneumatic control valve, fine tuning is carried out to the inflow of waste-heat recovery device respectively, to ensure that waste-heat recovery device operates in height
Imitate area.
In the design accounting of flue gas waste heat recovery apparatus area, it is assumed that the gross area of required flue gas waste heat recovery apparatus is
A, waste-heat recovery device outlet cigarette temperature design load is tout, four flues of correspondence are respectively a, b, c, d, then corresponding waste heat recovery
Device import cigarette temperature actual value is respectively ta,in、tb,in、tc,in、td,in, in correspondence flue flue gas flow account for the ratio of total flow according to
Secondary is ka、kb、kc、kd, illustrated with flue a and calculate the area A of corresponding waste-heat recovery device in flueaFormula below is referred to enter
Row is adjusted, and the area of the waste-heat recovery device in other flues is calculated using same procedure.
Above content is only explanation technological thought of the present utility model, it is impossible to limit protection model of the present utility model with this
Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical scheme each falls within this reality
Within protection domain with new claims.
Claims (6)
1. a kind of flue gas waste heat recovery system of unequal arrangement, it is characterised in that including air preheater (1) and deduster
(6)；It is connected between the exhanst gas outlet of air preheater (1) and deduster (6) by some flues, cloth is distinguished in each flue
Put a flue gas waste heat recovery apparatus；Each flue gas waste heat recovery apparatus water inlet is all connected to for carrying out coarse adjustment to inflow
Variable frequency pump (7) outlet on.
2. the flue gas waste heat recovery system of unequal arrangement according to claim 1, it is characterised in that deduster (6)
Entrance is provided with four flues.
3. the flue gas waste heat recovery system of unequal arrangement according to claim 2, it is characterised in that in four flues according to
The first flue gas waste heat recovery apparatus of secondary setting (2), the second flue gas waste heat recovery apparatus (3), the 3rd flue gas waste heat recovery apparatus (4)
And the 4th flue gas waste heat recovery apparatus (5).
4. the flue gas waste heat recovery system of unequal arrangement according to claim 3, it is characterised in that four fume afterheats
The ratio that the area of retracting device accounts for the fume afterheat gross area is followed successively by 20%~25%, 25%~30%, 25%~30%,
20%~25%.
5. the flue gas waste heat recovery system of the unequal arrangement according to claim 3 or 4, it is characterised in that each flue gas
The water inlet of waste-heat recovery device is respectively arranged to the pneumatic control valve (8) of fine tuning inflow.
6. the flue gas waste heat recovery system of unequal arrangement according to claim 5, it is characterised in that each fume afterheat
The delivery port of retracting device is converged in same pipeline and flowed back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720142002.3U CN206488264U (en) | 2017-02-16 | 2017-02-16 | A kind of flue gas waste heat recovery system of unequal arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720142002.3U CN206488264U (en) | 2017-02-16 | 2017-02-16 | A kind of flue gas waste heat recovery system of unequal arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206488264U true CN206488264U (en) | 2017-09-12 |
Family
ID=59764352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720142002.3U Expired - Fee Related CN206488264U (en) | 2017-02-16 | 2017-02-16 | A kind of flue gas waste heat recovery system of unequal arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206488264U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112097287A (en) * | 2019-06-17 | 2020-12-18 | 王键 | Boiler energy-saving and flue gas whitening system, process and application |
-
2017
- 2017-02-16 CN CN201720142002.3U patent/CN206488264U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112097287A (en) * | 2019-06-17 | 2020-12-18 | 王键 | Boiler energy-saving and flue gas whitening system, process and application |
| CN112097287B (en) * | 2019-06-17 | 2022-09-30 | 重庆鑫顺盛达科技有限公司 | Boiler energy-saving and flue gas whitening system, process and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170912 Termination date: 20180216 |