CN102252311B - Flue gas heat exchange device of oil field gas injection boiler and heat exchange method thereof - Google Patents
Flue gas heat exchange device of oil field gas injection boiler and heat exchange method thereof Download PDFInfo
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- CN102252311B CN102252311B CN201110197313.7A CN201110197313A CN102252311B CN 102252311 B CN102252311 B CN 102252311B CN 201110197313 A CN201110197313 A CN 201110197313A CN 102252311 B CN102252311 B CN 102252311B
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Abstract
The invention discloses a flue gas heat exchange device of an oil field gas injection boiler and a heat exchange method thereof. The device comprises an air heat exchanger and a condensing heat exchanger, wherein an air intake system of the air heat exchanger comprises a blower fan and an air duct, the air duct is communicated with an air inlet of the air heat exchanger, an air outlet of the air heat exchanger is communicated with a hot air inlet of the boiler, a flue gas inlet of the air heat exchanger is communicated with the boiler through a flue, a flue gas outlet of the air heat exchanger is communicated with the condensing heat exchanger via the flue provided with a draught fan, a water inlet and a water outlet are arranged on the condensing heat exchanger, and a condensed water pool is arranged at the lower part of the condensing heat exchanger. The method is accomplished by adopting the heat exchange device. In the device, sensible heat of the flue gas is recovered by the air heat exchanger, condensed latent heat of the flue gas is absorbed by the condensing heat exchanger, and the sensible heat and the latent heat of the flue gas are well absorbed by reasonably configuring the heat exchange temperatures of the air heat exchanger and the condensing heat exchanger, thus the advantages of effectively reducing energy consumption, improving boiler efficiency and saving plenty of energies are achieved.
Description
Technical field
The present invention relates to smoke heat exchanging device for gas injection furnace of oil field and heat-exchange method thereof.
Background technology
The thermal efficiency that calculates boiler in Thermal Power Engineering Field is all to calculate by the low heat valve of fuel, is also abroad so, and the exhaust gas temperature of fired oilfield gas injection boiler is 180～200 ℃ of left and right, with heat exchanger also more than 140 ℃.Water vapour in flue gas, in superheat state, can not condense into water and emit gasification latent heat, has wasted a large amount of heats.At present, fired oilfield gas injection boiler is natural gas fuel mostly, and the main component of natural gas is methane, and its equation is CH
4+ 2O
2=CO
2+ 2H
2o+ heat, can find out from the combustion equation of natural gas, every burning 1Nm
3natural gas approximately produce 21Nm
3the gasification latent heat of water vapour be about combustion gas low-calorie 11%.When exhaust gas temperature is higher, steam can not condensation be emitted heat, and along with gas emission, heat is wasted.Meanwhile, high-temperature flue gas is also taken away a large amount of sensible heats, forms larger heat loss due to exhaust gas.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of smoke heat exchanging device for gas injection furnace of oil field and heat-exchange method thereof that improves stove effect, reduces energy consumption.
For solving the problems of the technologies described above, the technical scheme that heat-exchanger rig of the present invention is taked is: a kind of smoke heat exchanging device for gas injection furnace of oil field, it comprises air heat exchanger and condensing heat exchanger, the air inlet system of described air heat exchanger comprises air blast, air channel, described air channel is connected with the air inlet on air heat exchanger, gas outlet on described air heat exchanger is communicated with the hot-air inlets of fired oilfield gas injection boiler, the mouth that enters on described air heat exchanger is communicated with fired oilfield gas injection boiler by flue, outlet flue on described air heat exchanger is connected with described condensing heat exchanger by the flue with air-introduced machine, described condensing heat exchanger is provided with water inlet and delivery port, described condensing heat exchanger bottom is provided with condensation pond.
The technical scheme that heat-exchange method of the present invention is taked is: it is realized by above-mentioned heat-exchanger rig, and air heat exchanger is positioned at the high-temperature region of flue gas, and its inner air flows to contrary with the flow direction of flue gas, and it is 100～102 ℃ that the flue-gas temperature of its discharge is controlled; Condensing heat exchanger is positioned at the low-temperature space of flue gas, and the direction of its internal cooling water is contrary with flue gas flow direction, and it is 50～70 ℃ that the flue-gas temperature of its discharge is controlled.
The beneficial effect that adopts technique scheme to produce is: the present invention carrys out the sensible heat of recovered flue gas by the air heat exchanger arranging, by condensing heat exchanger, absorb the condensation latent heat of flue gas, and by the heat-exchange temperature of reasonable disposition air heat exchanger and condensing heat exchanger, thereby sensible heat and the latent heat of flue gas have well been absorbed, effectively reduce energy consumption, improve stove effect, can save a large amount of energy.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Wherein, 1, hot-air inlets; 2, burner; 3, air blast; 4, fired oilfield gas injection boiler; 5, air heat exchanger; 6, gas outlet; 7, air inlet; 8, air-introduced machine; 9, condensing heat exchanger; 10, blast pipe; 11, condensation pond; 12, air channel; 13, water inlet; 14, delivery port; 15, flue.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Referring to accompanying drawing 1, the inventive system comprises air heat exchanger 5 and condensing heat exchanger 9, the air inlet system of described air heat exchanger 5 comprises air blast 3, air channel 12, described air channel 12 is communicated with the air inlet 7 of air heat exchanger 5, form cold wind air inlet system, gas outlet 6 on described air heat exchanger 5 is communicated with the hot-air inlets 1 of fired oilfield gas injection boiler 4, the mouth that enters on described air heat exchanger 5 is communicated with fired oilfield gas injection boiler 4 by flue 15, outlet flue on described air heat exchanger 5 is connected with described condensing heat exchanger 9 by the flue with air-introduced machine 8, described condensing heat exchanger 9 is provided with water inlet 13 and delivery port 14, described condensing heat exchanger 9 bottoms are provided with condensation pond 11.Air heat exchanger 5 adopts combustion air as cold air medium, and the hot-air after heat exchange is transported to the burner combustion of fired oilfield gas injection boiler 4, is conducive to the burning of fuel, utilizes the radiation heat transfer of radiant section.Condensing heat exchanger 9 can adopt the feedwater of fired oilfield gas injection boiler 4 as cooling medium.The condensation pond 11 arranging can be discharged the condensed water producing in time, enters sewerage.
Referring to accompanying drawing 1, heat-exchange method of the present invention adopts above-mentioned heat-exchanger rig to complete, and air heat exchanger 5 is positioned at the high-temperature region of flue gas, and its inner air flows to contrary with the flow direction of flue gas, and it is 100～102 ℃ that the flue-gas temperature of its discharge is controlled; Condensing heat exchanger 9 is positioned at the low-temperature space of flue gas, and the direction of its internal cooling water is contrary with flue gas flow direction, and it is 50～70 ℃ that the flue-gas temperature of its discharge is controlled.Condensing heat exchanger 9 can be reduced to 50～70 ℃ from more than 100 degree the temperature of flue gas, fully the latent heat of recovered flue gas.This condensing heat exchanger 9 is owing to adopting reverse convection heat exchange, thereby has very high convection transfer rate, can effectively reduce exhaust gas temperature.
At present, therrmodynamic system is calculated boiler efficiency and all with low heat valve, is calculated, although nominally the thermal efficiency is higher, because natural gas high-low position heating value differs 11% left and right, therefore actual energy utilization rate waits to improve.Of the present invention is exactly to make full use of the sensible heat of flue gas and the physics heat energy of recovery of latent heat flue gas, when the operating temperature of condensing heat exchanger is during lower than the dew-point temperature of flue gas, water vapour in flue gas will be condensed, discharge latent heat, the high-low-position caloric value of 10% left and right is poor just can be effectively used, thereby reached the saving energy, fallen low consumed object.
During use, according to the thermic load in on-the-spot oil field, match suitable air heat exchanger and condensing heat exchanger, it all should select efficient heat exchanger.The principle of apolegamy is: flue gas flue-gas temperature after air heat exchanger, a little more than 100 ℃, to guarantee the not condensation of water vapour in this stage flue gas, is mainly to absorb obvious heat of smoke.Flue gas flue-gas temperature after condensing heat exchanger drops to 50～70 ℃, is mainly the latent heat of condensation that absorbs water vapour.
Claims (1)
1. a fired oilfield gas injection boiler flue gas heat exchange method, it is characterized in that: its smoke heat replacing device by a set of special use completes, described smoke heat replacing device comprises air heat exchanger (5) and condensing heat exchanger (9), the air inlet system of described air heat exchanger (5) comprises air blast (3), air channel (12), described air channel (12) is connected with the air inlet (7) on air heat exchanger (5), gas outlet (6) on described air heat exchanger (5) is communicated with the hot-air inlets (1) of fired oilfield gas injection boiler, the mouth that enters on described air heat exchanger (5) is communicated with fired oilfield gas injection boiler (4) by flue (15), outlet flue on described air heat exchanger (5) is connected with described condensing heat exchanger (9) by the flue of band air-introduced machine (8), described condensing heat exchanger (9) is provided with water inlet (13) and delivery port (14), described condensing heat exchanger (9) bottom is provided with condensation pond (11),
Described method is: air heat exchanger (5) is positioned at the high-temperature region of flue gas, its inner air is flowed to contrary with the flow direction of flue gas, and it is 100～102 ℃ that the flue-gas temperature of its discharge is controlled; Condensing heat exchanger (9) is positioned at the low-temperature space of flue gas, and the direction of its internal cooling water is contrary with flue gas flow direction, and it is 50～70 ℃ that the flue-gas temperature of its discharge is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110197313.7A CN102252311B (en) | 2011-07-14 | 2011-07-14 | Flue gas heat exchange device of oil field gas injection boiler and heat exchange method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110197313.7A CN102252311B (en) | 2011-07-14 | 2011-07-14 | Flue gas heat exchange device of oil field gas injection boiler and heat exchange method thereof |
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| Publication Number | Publication Date |
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| CN102252311A CN102252311A (en) | 2011-11-23 |
| CN102252311B true CN102252311B (en) | 2014-03-26 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104905B (en) * | 2011-12-08 | 2016-01-13 | 上海晟煜科贸有限公司 | Condensation type steam filling boiler of gas oil field |
| CN103090370B (en) * | 2013-01-25 | 2015-02-25 | 西安交通大学 | Air distribution structure for improving combustion efficiency of fuel oil steam injection boiler and air distribution method |
| CN103134043B (en) * | 2013-01-29 | 2015-04-08 | 北京源深节能技术有限责任公司 | Boiler system with U-shaped flue and boiler water charging system |
| CN107388272A (en) * | 2017-08-29 | 2017-11-24 | 力聚热力设备科技有限公司 | A kind of eliminating white smoke device that dries of boiler exhaust gas |
| CN116518731A (en) * | 2023-04-28 | 2023-08-01 | 秦皇岛玻璃工业研究设计院有限公司 | Flue gas separation system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2580300Y (en) * | 2002-11-15 | 2003-10-15 | 王德瑞 | Waste heat recovering device for oil field thick oil heat production steam injection boiler |
| CN2583510Y (en) * | 2002-11-19 | 2003-10-29 | 张崇荣 | Smoke waste heat comprehensive utilization system for oil field steam boiler |
| CA2430088A1 (en) * | 2003-05-23 | 2004-11-23 | Acs Engineering Technologies Inc. | Steam generation apparatus and method |
| CN202203928U (en) * | 2011-07-14 | 2012-04-25 | 北京时代博诚能源科技有限公司 | Smoke heat exchanging device for gas injection furnace of oil field |
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2011
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Denomination of invention: Flue gas heat exchange device of oil field gas injection boiler and heat exchange method thereof Effective date of registration: 20141126 Granted publication date: 20140326 Pledgee: Beijing technology intellectual property financing Company limited by guarantee Pledgor: SOBC Energy Sources Science and Technology Co.,Ltd. Registration number: 2014990000992 |
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Date of cancellation: 20161128 Granted publication date: 20140326 Pledgee: Beijing technology intellectual property financing Company limited by guarantee Pledgor: SOBC Energy Sources Science and Technology Co.,Ltd. Registration number: 2014990000992 |
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