CN205402641U - Become residual heat from flue gas boiler of space unsteady flow field - Google Patents
Become residual heat from flue gas boiler of space unsteady flow field Download PDFInfo
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- CN205402641U CN205402641U CN201620152833.4U CN201620152833U CN205402641U CN 205402641 U CN205402641 U CN 205402641U CN 201620152833 U CN201620152833 U CN 201620152833U CN 205402641 U CN205402641 U CN 205402641U
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Abstract
The utility model discloses a become residual heat from flue gas boiler of space unsteady flow field has adopted four heat absorption section, and wherein low temperature heat absorption section has adopted that the nearly dew point of low temperature is anticorrosive, the energy -conserving heat transfer YHSP device of the high -efficient recovery of flue gas for low temperature heat absorption section has improved medium temperature heat absorption section's imported temperature, and the device this does not produce sour dew corrode under the constantly changeable operating mode of boiler load. In addition, the indirect heating equipment of this boiler all adopts SP high efficiency heat exchange tube, has good enhanced heat transfer effect, reduces the pressure drop when guaranteeing the gas flow rate, and difficult emergence vibration just has stronger resistive connection dirt and the ability that prevents the booster. Is this boiler than traditional waste heat recovery device volume reduction 20 30%, weight loss 30 40%, realized flue gas low temperature waste heat recovery energy saving and emission reduction.
Description
Technical field
The utility model relates to Waste Heat Recovery and utilizes field, is specifically related to more than the flue gas of a kind of emptying unsteady flow field
Thimble-tube boiler.
Background technology
China is always rough growth type in using energy source, and efficiency of energy utilization is low, and deficiency in economic performance is always
It is subject matter present in China's using energy source.And in China, this industrial enterprise of industrial exhaust heat is producing
During heat energy conversion equipment and with can in equipment unemployed energy resource the abundantest, add up 4000
Many ten thousand tons of mark coals.Especially steel industry, the 10.4% of its residual heat resources Liang Zhan China waste heat total resources.
But, its residual heat resources rate of recovery but only has 21.7%.Therefore, the residual heat resources of iron and steel metallurgical industry are improved
Utilization rate, excavates the utilization potentiality of residual heat resources for energy-saving and emission-reduction energetically by technological innovation and appropriate design
There is profound significance.
At present, there is a lot of problem, first, the biggest one in the waste heat recovery field of the iron and steel metallurgical industry of China
The sensible heat of the waste heat carriers such as part medium-sized and small enterprises equipment falls behind, flue gas can not effectively preserve, and flue gas is emitted by burner hearth
Going out, suck cold wind, bypass flue short circuit and pipe insulation are heat insulation bad so that a lot of stoves are at retracting device
Front flue gas heat loss is the biggest.Secondly, the comprehensive utilization of waste heat is poor, and major part waste heat is merely with one
Secondary.Further, since current most high-temperature residual heat not yet can be fully utilized, in causing, low temperature
Being used without of waste heat obtains enough attention, it is impossible to is truly realized and makes the best use of everything.Furthermore, waste heat recovery sets
Standby the most perfect with system.Some waste heat utilization equipments such as heat exchanger performance is poor, have impact on the waste heat of entirety
Organic efficiency.Some waste heat recovery apparatus function admirables, but owing to the inadequate science of the design of total system is closed
Reason, causes system integral level the highest, as do not considered comprehensive utilization, lacks the system being adjustably controlled, with
And heat-insulating property is poor etc., causes whole heat recovery boiler ineffective systems, even affects it and use the longevity
Life.Huge and energy-saving and emission-reduction the national strategy of energy proportion consumed in view of China's Ferrous Metallurgy industry is wanted
Asking, the waste heat recovery efficiency improving each production field especially iron and steel metallurgical industry is the most necessary.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide the cigarette of a kind of emptying unsteady flow field
Gas heat recovery boiler, to improve flue gas heat exchange efficiency.
To achieve these goals, the utility model adopts the technical scheme that:
A kind of flue gas waste heat recovery boiler of emptying unsteady flow field, including a horizontal body of heater, body of heater from a left side to
The right side is followed successively by high-temperature flue gas air inlet, superheater 9, evaporimeter 10, economizer 11, YHSP heat exchanger 12
Export with low-temperature flue gas；
Also including drum 6, oxygen-eliminating device 5 and the low temperature drum 7 being positioned at above described body of heater, drum 6 leads to respectively
Cross economizer outlet pipe 1 to be connected with economizer 11, by evaporimeter tedge 3 and evaporimeter down-comer 2 with
Evaporimeter 10 is connected, and is connected with superheater 9 by superheat section steam inlet pipe 4, by oxygen-eliminating device steam inlet pipe 18
It is connected with oxygen-eliminating device 5；Oxygen-eliminating device 5 is connected with economizer 11 by oxygen-eliminating device outlet pipe 15；Low temperature drum 7
It is connected with low temperature cold water source by autocontrol valve 16, is connected with oxygen-eliminating device 5 by oxygen-eliminating device water inlet pipe 17.
Compared with prior art, the beneficial effects of the utility model are:
The flue gas waste heat recovery boiler of emptying unsteady flow field of the present utility model, have employed four endotherm sections, its
Middle low temperature endotherm section have employed low temperature nearly dew point anticorrosion, flue gas high efficiente callback energy-conservation heat exchange YHSP (flue gas heat exchange
The helix-deformed pipe of device) device so that low temperature endotherm section improves the inlet water temperature of middle temperature endotherm section, and device
This does not produce acid dew corrosion under the operating mode that boiler load is continually changing.It addition, the heat transmission equipment of this boiler
All use SP (special spiral) efficient heat-exchanging pipe, there is good augmentation of heat transfer effect, it is ensured that gas stream
Reduce pressure drop while speed, be not susceptible to vibration and have stronger ant-scaling and prevent the ability of booster.This pot
Stove reduces 20-30% than traditional waste-heat recovery device volume, and weight reduces 30-40%, it is achieved that flue gas is low
Temperature waste heat recovering energy conserving reduces discharging.
Accompanying drawing explanation
Fig. 1 is the structural representation of the flue gas waste heat recovery boiler of emptying unsteady flow field of the utility model；
Fig. 2 is the abrasion schematic diagram of pipe heat exchanger；
Fig. 3 is the abrasion schematic diagram of SP efficient heat-exchanging pipe；
Fig. 4 is the overall schematic of SP efficient heat-exchanging pipe；
Fig. 5 is the front elevation of heat transmission equipment；
Fig. 6 is the side view of heat transmission equipment；
Fig. 7 is the stereogram of heat transmission equipment.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the utility model is further described.
As it is shown in figure 1, the smoke and waste steam boiler of emptying unsteady flow field of the utility model, including economizer water outlet
Pipe 1, evaporimeter down-comer 2, evaporimeter tedge 3, superheater steam inlet pipe 4, oxygen-eliminating device 5, drum 6,
Low-temperature zone drum 7, header tube 8, superheater 9, evaporimeter 10, economizer 11, YHSP heat exchanger 12,
Wall temperature test point 13, robot control system(RCS) 14, oxygen-eliminating device outlet pipe 15, autocontrol valve 16, oxygen-eliminating device is intake
Pipe 17, oxygen-eliminating device steam inlet pipe 18.
The heat carrier of this boiler is industrial smoke, and wherein water/vapour walks tube side, and flue gas walks shell side.This boiler includes
One horizontal body of heater, body of heater is from left to right followed successively by high-temperature flue gas air inlet, superheater (superheat section) 9, steams
Send out device (high temperature section) 10, economizer (middle-temperature section) 11, YHSP heat exchanger (low-temperature zone) 12, low temperature cigarette
Gas exports.The drum 6 of top, is connected with economizer 11 by economizer outlet pipe 1 respectively, by evaporation
Device tedge 3 is connected with evaporimeter 10 with evaporimeter down-comer 2, by superheat section steam inlet pipe 4 and superheater
9 are connected, and are connected with oxygen-eliminating device 5 by oxygen-eliminating device steam inlet pipe 18.Oxygen-eliminating device 5 is by oxygen-eliminating device outlet pipe 15
It is connected with economizer 11.
Working medium flow of the present utility model: the cold water of the normal temperature water inlet from the rightmost side enters boiler low-temperature section
Drum pipeline, be saturated in low-temperature zone drum water heating after enter oxygen-eliminating device 5 deoxygenation head, absorb from
After the steam heat of drum 6, the water becoming higher temperature carries out thermal de-aeration, and the water after deoxygenation passes through deoxygenation
Device outlet pipe 15 enters middle-temperature section header and absorbs flue gas heat hence into economizer 11, then produces the most saturated
Water enters drum 6 through outlet pipe；Saturation water in drum 6 relies on gravity to enter evaporimeter 10, at evaporimeter
Produce evaporation process after drawing flue gas heat in 10, form steam-water mixing stream and come back to drum through tedge
6；The steam collected in drum 6 enters superheat section header tube after drum 6 top produces gas-liquid separation thus enters
Entering tube bank, saturated vapor continues heat absorption in superheat section and becomes after superheated steam the header tube outlet along superheat section
Adapter is pooled to steam pipe line.Temperature in Fig. 1 is reference temperature.
Flue gas flow direction in the flue gas waste heat recovery boiler of emptying unsteady flow field of the utility model: the flue gas of high temperature by
The gas approach on the boiler left side enters the shell side of boiler, wash away the most successively superheat section, high temperature section, in
Temperature section and the heating surface of low-temperature zone, eventually become low-temperature flue gas outlet on the right of boiler and discharge.
This steam generator system be provided with four endotherm section hyperthermia and superheating endotherm sections, high temperature evaporation endotherm section, in
Temperature convection current endotherm section and low temperature YHSP (flue gas heat exchange is helically twisted) endotherm section, such comprehensive waste heat returns
Receipts system is sufficiently used the waste heat of each temperature section.The effect of high temperature section is to produce high-quality superheated steam
As cogeneration；Middle-temperature section effect is to produce high pressure-temperature saturation water；Low temperature nearly dew point anticorrosion, flue gas are high
Effect reclaims energy-conservation heat exchange YHSP heat exchanger (being called for short low temperature YHSP endotherm section), and low temperature endotherm section effect is
Reclaim low temperature exhaust heat further and be used for improving the inlet water temperature of middle temperature endotherm section, and make equipment originally in pot
Acid dew corrosion is not produced under the operating mode that stove load is continually changing.The high temperature endothermic section of efficient waste heat reclaimer,
Middle temperature endotherm section and low temperature endotherm section all use walks the wall-type heat exchange mode leaked water in flue gas, pipe outside pipe.This
The heat transmission equipment of system all uses SP efficient heat-exchanging pipe, and as shown in Figure 4, it is emptying that this heat exchanger tube has self-supporting
Between alternating curved (be called for short SP) feature, tube side cross section is by justifying flat or other shape of change, and this heat exchanger tube uses three
Dihedral arrangement, can realize spatial volume change, it is ensured that the flow velocity of gas well in shell journey space
While also reduce pressure drop.On the other hand, the helix-deformed heat exchanger of described heat-transfer pipe, tube side and shell side are all
Having good heat-transfer effect, tube fluid can form strong spiral flow, and extratubal fluid can be formed strong
Flow-disturbing, destroys the boundary layer near heat exchange wall, and the heat exchange efficiency of equipment improves 30～40%.By force
Also there is while changing heat transfer the ability of good ant-scaling, simultaneously because the self-supporting geometry of heat exchanger
Form, eliminates the deflection plate needed for traditional heat exchangers, by heat exchanger while elimination heat transfer flow dead band
Cross-flow be changed into longitudinal stream, it is achieved the optimal flow mode of the pure adverse current of medium.Avoid in traditional heat exchangers
The transversal flow of fluid exchange heat pipe, the vibration occurred in effectively reducing heat exchanger, and reduce exhaust
The energy consumption of blower fan.The front elevation of heat transmission equipment that Fig. 5-7 respectively SP heat exchanger is formed, side view and vertical
Body figure, it includes SP heat exchanger 101, strapping 102, header 103, supports channel-section steel 104, side plate 105
With adapter 106.
The flue gas of process section is collected and is recovered to waste heat boiler and concentrates and produce supersaturated vapor by this steam generator system
Deliver to steam pipe line.The tube bank global design of the middle temperature section of boiler uses " Dujiang weir principle " stringing side
Formula, optimizes the flow field in its tube bank, improves and restrains minimum tube wall temperature to adapt to the load variations of boiler.Special
The design of emptying of deformation heat-transfer pipe longitudinal flow-disturbing bundling type, it is to avoid tube bank vibrations.Volume is little, weight
Gently.Flue gas resistance is little, reduces blower fan resistance.
Waste heat boiler in a lot of fields is unstable due to thermal source, causes tube bank to bear instantaneous heat impact, if
Being to use common pipe to change part as tube bank, the steam-water separation in pipe is insufficient, and drop can be attached to inner tubal wall,
Meeting explosive vaporization phase transformation after drop heat absorption, produces moment blasting impact, after a period of time accumulation, and heat exchanger tube meeting
Rupture.But the tube bank of middle-temperature section uses SP efficient heat-exchanging pipe, and its own has the feature of rotating separation, therefore
Steam can be realized while heat exchange to be separated from water, it is to avoid the drop in steam is attached to tube wall, result in quick-fried
Run affairs former.
Shown in Fig. 2 it isThe abrasion schematic diagram of pipe, is to use shown in Fig. 3Pipe is processed
The abrasion schematic diagram of high-ratio surface SP efficient heat-exchanging pipe.The ground that pipe abrasion is maximum as can be seen from Fig.
Side occurs in the place of 60 °, and this place is the most worn out, and (namely pipe is along the flow direction in the position of 180 °
The back side) have an eddy current, speed declines, the easy dust stratification in this place.On the contrary, high-ratio surface SP pipe is due to shape
The change of shape, meets flow pattern so that avoids in 60 ° of places or alleviates abrasion, extending heat exchange
The life-span of pipe, and there is no eddy current high-ratio surface SP pipe 180 °, it is not likely to produce fouling phenomenon and occurs.
YHSP heat exchanger is one of core component of this steam generator system, and it is by the most only in former heat exchange of heat pipe
Vertical part, is configured to the entirety that is mutually related, " phase-change heat-exchange " and " flue gas by optimizing design
Cross-flow tube bank " compare its exchange capability of heat there is " magnitude (102Above) improve " thermal conduction study characteristic,
Realize " YHSP system " metal wall bulk temperature to be evenly distributed and flue-gas temperature holding " less gradient
Temperature drop (temperature difference 10-20 DEG C) " and specific function " independent of heated Temperature of Working " in principle.With
This utilizes this performance of " YHSP system ", preheating to enter previous stage heat exchanger (such as middle-temperature section simultaneously
Evaporimeter) inlet temperature of working medium, it is ensured that whole equipment is equally from cold end corrosion.
Additionally, by YHSP heat exchanger or other set up the regulation of parts heat exchange amount, it is achieved set whole
The closed-loop control of the standby different lowermost wall surface temperatures being likely to occur, it is ensured that wall surface temperature is constant or controllable,
To adapt to the change of fuel type and operating mode.So, on the premise of ensureing equipment safety operation, reach
The significantly energy-conservation purpose of Mist heat recovering.
Above-listed detailed description is illustrating for the utility model possible embodiments, and this embodiment is not used
To limit the scope of the claims of the present utility model, all equivalences done without departing from the utility model are implemented or change,
It is intended to be limited solely by the scope of the claims of this case.
Claims (4)
1. the flue gas waste heat recovery boiler of an emptying unsteady flow field, it is characterised in that
Including a horizontal body of heater, body of heater be from left to right followed successively by high-temperature flue gas air inlet, superheater (9),
Evaporimeter (10), economizer (11), YHSP heat exchanger (12) and low-temperature flue gas outlet；
Also include drum (6), oxygen-eliminating device (5) and the low temperature drum (7) being positioned at above described body of heater, drum (6)
It is connected with economizer (11), by evaporimeter tedge (3) and evaporimeter by economizer outlet pipe (1) respectively
Down-comer (2) is connected with evaporimeter (10), is connected with superheater (9) by superheat section steam inlet pipe (4), passes through
Oxygen-eliminating device steam inlet pipe (18) is connected with oxygen-eliminating device (5)；Oxygen-eliminating device (5) is by oxygen-eliminating device outlet pipe (15) and province's coal
Device (11) is connected；Low temperature drum (7) is connected with low temperature cold water source by autocontrol valve (16), passes through deoxygenation
Device water inlet pipe (17) is connected with oxygen-eliminating device (5).
The flue gas waste heat recovery boiler of emptying unsteady flow field the most according to claim 1, its feature exists
In,
The flue gas of high temperature by the described body of heater left side high-temperature flue gas import enter described body of heater shell side, from a left side to
The right side washes away superheater (9), evaporimeter (10), economizer (11) and the heating surface of YHSP heat exchanger (12) successively,
Eventually become low-temperature flue gas low-temperature flue gas outlet on the right of described body of heater to discharge.
The flue gas waste heat recovery boiler of emptying unsteady flow field the most according to claim 2, it is characterised in that
Described low temperature cold water source by autocontrol valve (16) enter low temperature drum (7), in low temperature drum (7)
In be saturated water heating after enter oxygen-eliminating device (5), absorb from after the steam heat of drum (6), become higher
The water of temperature carries out thermal de-aeration, and the water after deoxygenation enters middle-temperature section header by oxygen-eliminating device outlet pipe (15)
Pipe absorbs flue gas heat hence into economizer (11), then produces nearly saturation water through economizer outlet pipe (1)
Enter drum (6)；Saturation water in drum (6) relies on gravity to enter evaporimeter through evaporimeter down-comer (2)
(10), after evaporimeter (10) is drawn flue gas heat, produce evaporation process, form steam-water mixing and flow through
Pervaporation device tedge (3) comes back to drum (6)；The steam collected in drum (6) produces on drum (6) top
After raw gas-liquid separation, entrance superheat section header tube is hence into superheater (9), and saturated vapor is in superheater (9)
Continue heat absorption become superheated steam after along superheat section header tube export be pooled to steam pipe line.
The flue gas waste heat recovery boiler of emptying unsteady flow field the most according to claim 3, it is characterised in that
Heat transmission equipment in described body of heater uses SP efficient heat-exchanging pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620152833.4U CN205402641U (en) | 2016-02-29 | 2016-02-29 | Become residual heat from flue gas boiler of space unsteady flow field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620152833.4U CN205402641U (en) | 2016-02-29 | 2016-02-29 | Become residual heat from flue gas boiler of space unsteady flow field |
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| CN205402641U true CN205402641U (en) | 2016-07-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588095A (en) * | 2016-02-29 | 2016-05-18 | 中国科学院广州能源研究所 | Flue gas waste heat recycling boiler with variable space and variable flow fields |
| CN107940439A (en) * | 2017-10-25 | 2018-04-20 | 河南中烟工业有限责任公司 | A kind of boiler smoke heat energy recycling system |
| CN111289278A (en) * | 2020-02-20 | 2020-06-16 | 苏州西热节能环保技术有限公司 | Method for evaluating effect of hedging coal-fired boiler after secondary air box flow field transformation |
-
2016
- 2016-02-29 CN CN201620152833.4U patent/CN205402641U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588095A (en) * | 2016-02-29 | 2016-05-18 | 中国科学院广州能源研究所 | Flue gas waste heat recycling boiler with variable space and variable flow fields |
| CN107940439A (en) * | 2017-10-25 | 2018-04-20 | 河南中烟工业有限责任公司 | A kind of boiler smoke heat energy recycling system |
| CN111289278A (en) * | 2020-02-20 | 2020-06-16 | 苏州西热节能环保技术有限公司 | Method for evaluating effect of hedging coal-fired boiler after secondary air box flow field transformation |
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