CN104258993B - Air-distribution device and the smoke dust-removing equipment with the air-distribution device - Google Patents
Air-distribution device and the smoke dust-removing equipment with the air-distribution device Download PDFInfo
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- CN104258993B CN104258993B CN201410545056.5A CN201410545056A CN104258993B CN 104258993 B CN104258993 B CN 104258993B CN 201410545056 A CN201410545056 A CN 201410545056A CN 104258993 B CN104258993 B CN 104258993B
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- 239000000779 smoke Substances 0.000 title claims abstract description 34
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 96
- 239000003546 flue gas Substances 0.000 claims abstract description 96
- 239000007789 gas Substances 0.000 claims abstract description 50
- 239000000428 dust Substances 0.000 claims abstract description 26
- 235000019504 cigarettes Nutrition 0.000 claims description 27
- 239000004071 soot Substances 0.000 claims description 19
- 238000013459 approach Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- 238000010926 purge Methods 0.000 claims 1
- 239000002956 ash Substances 0.000 description 23
- 239000002253 acid Substances 0.000 description 7
- 239000004744 fabric Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- KUBDPQJOLOUJRM-UHFFFAOYSA-N 2-(chloromethyl)oxirane;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound ClCC1CO1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 KUBDPQJOLOUJRM-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Electrostatic Separation (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a kind of air-distribution device and the smoke dust-removing equipment with the air-distribution device, the air-distribution device includes housing (3), described housing (3) have the air inlet and gas outlet being oppositely arranged, wherein, M heat exchange tube layer is provided with housing (3), the plane that the M heat exchange tube layer is located is parallel to each other, each described heat exchange tube layer includes multiple heat exchanger tubes (16) that the plane being located along the heat exchange tube layer is arranged spaced reciprocally, the plane that each described heat exchange tube layer is located is vertical with the distance between the air inlet and gas outlet direction, the two ends of each heat exchanger tube (16) are connected with the housing (3) respectively, M is the positive integer more than or equal to 2.The air-distribution device that the present invention is provided, using the uniformity of the gap adjustment flue gas flow field between heat exchanger tube；Meanwhile, heat transferring medium is passed through in heat exchanger tube, the heat exchange by the heat transferring medium in flue gas and heat exchanger tube improves efficiency of dust collection reducing the temperature of flue gas.
Description
Technical field
The present invention relates to atmosphere pollution administer field, in particular it relates to a kind of air-distribution device and have the air-distribution device
Fume dust remover.
Background technology
Coal-burning power plant more than 95% adopts electrostatic precipitator at present.It is well known that dry electrostatic cleaner is for fine grained
Thing removal ability is very limited, and reason is, fine particle flue dust composition is mostly salic minerals, and its high specific resistance characteristic is led
Cause removal efficiency low, and " secondary droplets " that mechanical vibrator causes.And fly ash resistivity is closely related with flue-gas temperature, its peak
Value is occurred between 121 DEG C～232 DEG C, when more than 232 DEG C according to coal ash characteristic, and the ratio resistance of flying dust becomes anti-with absolute temperature
Than；And when being less than 121 DEG C, fly ash resistivity and PTAT.In fact, when exhaust gas temperature is more than 140 DEG C, because of row
The rising of cigarette temperature and the increase of flue gas volume, are had a negative impact in itself to boiler thermal output and efficiency of dust collection；If smoke evacuation temperature
Degree coheres, because acid dew condenses particle, increases less than acid dew-point temperature (generally 95～110 DEG C between), be easily caused deashing difficulty,
Efficiency of dust collection declines, and causes acid dew corrosion to electric cleaner housing, blower fan and back-end ductwork.
Understood based on above-mentioned analysis, how to making the flue gas cool-down of deduster porch, make deduster inlet flue gas temperature between
Between 95～110 DEG C, become one of effective means for realizing existing electric cleaner synergy.
Existing deduster porch is provided with air-distribution device, and the structure of this air-distribution device is as shown in figure 1, including shell
1001, the shell 1001 is provided with three road distribution grids with air inlet 1002 positioned opposite and gas outlet 1003 in shell 1001
1004, multiple through holes 1005 are offered respectively on each road distribution grid 1004, gas enters the air-distribution device by air inlet 1002
In, the through hole 1005 then sequentially passed through on each road distribution grid 1004 carries out flue gas flow field adjustment, finally enters from gas outlet 1003
Enter deduster entrance.It follows that above-mentioned air-distribution device can only be realized carrying out cloth wind to flue gas, it is impossible to deduster porch
Flue gas cool-down, thus also cannot just improve efficiency of dust collection.
Therefore, air-distribution device how is made to be uniformly distributed can flue gas, can carry out cooling to flue gas again becomes this area skill
Art personnel's technical issues that need to address.
Content of the invention
It is an object of the invention to provide a kind of air-distribution device, the air-distribution device while being uniformly distributed to flue gas again
Can play a part of to reduce flue-gas temperature, so as to improve efficiency of dust collection.
To achieve these goals, the present invention provides a kind of air-distribution device, and including housing, the housing has and is oppositely arranged
Air inlet and gas outlet, wherein, in the housing, be provided with M heat exchange tube layer, the plane that the M heat exchange tube layer is located is mutual
Parallel, each described heat exchange tube layer includes multiple heat exchanger tubes that the plane being located along the heat exchange tube layer is arranged spaced reciprocally, per
The plane that the individual heat exchange tube layer is located is vertical with the distance between the air inlet and gas outlet direction, each described heat exchanger tube
Two ends be connected with the housing respectively, M be more than or equal to positive integer.
Preferably, the multiple heat exchanger tubes in the same heat exchange tube layer are arranged in parallel to each other, two neighboring heat exchanger tube
Heat exchanger tube setting interlaced with each other in layer.
Preferably, the M heat exchange tube layer constitutes N number of heat exchanger tube row, and each described heat exchanger tube row includes to be disposed adjacent
Multiple described heat exchange tube layer, be spaced between the N number of heat exchanger tube row, N is the positive integer less than M.
Preferably, the housing is frustoconical, and the air inlet and gas outlet are located at the two ends of the housing respectively, and
And the diameter with diameter greater than the air inlet of the gas outlet.
Preferably, the distance between central axis of adjacent two heat exchanger tube in each described heat exchange tube layer is described
3～3.5 times of heat exchanger tube radius, the equivalent percent opening of each heat exchange tube layer is 30%～36%.
Preferably, also include that the one-level inlet header outside the housing, primary outlet header, multiple secondary inlet join
Case and multiple secondary exit port headers, the two ends of each heat exchanger tube row distinguish the corresponding secondary inlet header and institute
The connection of secondary exit port header is stated, the inlet end of multiple secondary inlet headers is connected with the outlet side of the one-level inlet header
Logical, the outlet side of multiple secondary exit port headers is connected with the inlet end of the primary outlet header；
One end of each heat exchanger tube is connected with secondary inlet header, and the other end is connected with secondary exit port header.
Preferably, the one-level inlet header and primary outlet header are arranged as putting down with the length direction of the heat exchanger tube
OK, the secondary inlet header and secondary exit port header are respectively perpendicular to the one-level inlet header and primary outlet header.
Preferably, the inlet end connection booster fan of the one-level inlet header, the outlet side of the primary outlet header
Connection air preheater.
The present invention also provides a kind of smoke dust-removing equipment, and including flue gas air-distribution device, wherein, the flue gas air-distribution device is
According to air-distribution device of the present invention.
Preferably, the smoke dust-removing equipment includes electric cleaner, electric cleaner gas approach and electric cleaner outlet cigarette
Road, the electric cleaner gas approach are connected with the air inlet of the flue gas air-distribution device, the giving vent to anger of the flue gas air-distribution device
Mouth is connected with the inlet end of the electric cleaner, and the outlet side of the electric cleaner is connected with the electric cleaner exhaust pass.
Preferably, the smoke dust-removing equipment includes one-level inlet header outside the housing, primary outlet header, many
Corresponding described two grades distinguished by individual secondary inlet header and multiple secondary exit port headers, the two ends of each heat exchanger tube row
Inlet header is connected with the secondary exit port header, the inlet end of multiple secondary inlet headers and the one-level inlet header
Outlet side connection, the outlet side of multiple secondary exit port headers is connected with the inlet end of the primary outlet header；Each
One end of the heat exchanger tube is connected with secondary inlet header, and the other end is connected with secondary exit port header；The one-level inlet header
It is provided with flow control valve；
The smoke dust-removing equipment also includes cigarette temperature feedback attemperating unit, and the cigarette temperature feedback attemperating unit includes to be arranged on
Electric cleaner inlet flue gas temperature measuring point, the electricity being arranged on the electric cleaner exhaust pass on the electric cleaner gas approach
House outlet cigarette temperature measuring point, the inlet air temp measuring point being arranged on the one-level inlet header, it is arranged on the one-level
Air exit temp measuring point and controller on outlet header, the controller are surveyed with the electric cleaner inlet flue gas temperature respectively
Point, electric cleaner outlet cigarette temperature measuring point, inlet air temp measuring point, air exit temp measuring point and flow control valve are electrically connected
Connect, the controller is used for receiving the electric cleaner inlet flue gas temperature measuring point, electric cleaner outlet cigarette temperature measuring point, air intake temperature
Degree measuring point, the temperature information of air exit temp measuring point transmission simultaneously control opening for the flow control valve according to the temperature information
Degree.
Preferably, the smoke dust-removing equipment includes cleaner, and the cleaner includes to connect with the air-distribution device
Logical soot blower and the first ash bucket of the air-distribution device bottom is connected to, the soot blower is used for being deposited in the cloth wind
During dust in device is purged to first ash bucket.
Preferably, the smoke dust-removing equipment includes the Distributed Control System electrically connected with the soot blower, the collecting and distributing control
System processed is used for soot blower described in the automatic of interval at preset timed intervals.
Preferably, the electric cleaner bottom is provided with the second ash bucket, and first ash bucket and second ash bucket are all and gas
Power conveying device connects, and the Pneumatic conveyer is used for being delivered to the dust in first ash bucket and second ash bucket
Outside the smoke dust-removing equipment.
The air-distribution device that the present invention is provided, using the uniformity of the gap adjustment flue gas flow field between heat exchanger tube；Meanwhile, change
Heat transferring medium is passed through in heat pipe, and the heat exchange by the heat transferring medium in flue gas and heat exchanger tube reduces reducing the temperature of flue gas
The volume of flue gas.When the gas outlet of the air-distribution device is connected with the arrival end of electric cleaner, as the volume of flue gas reduces, because
And flow velocity of the flue gas in electric cleaner reduces, the time of staying of the flue gas in the electric field of electric cleaner is extended, so as to
Improve efficiency of dust collection.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of specification, with following tool
Body embodiment is used for explaining the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the structural representation of air-distribution device of the prior art；
Fig. 2 is the right view of Fig. 1；
Fig. 3 is the structural representation of the smoke dust-removing equipment of embodiment of the present invention, illustrated therein is the cloth wind of the present invention
Device；
Fig. 4 is the A-A of Fig. 3 to cut-away view.
Description of reference numerals
1 electric cleaner gas approach, 2 air-distribution device
3 housing, 4 high-tension electricity input system
5 electric cleaner, 6 electric cleaner exports cigarette temperature measuring point
7 second ash bucket, 8 Pneumatic conveyer
9 first ash bucket, 10 electric cleaner exhaust pass
11 soot blower, 12 electric cleaner inlet flue gas temperature measuring point
13 air exit temp measuring point, 14 primary outlet header
15 secondary exit port header, 16 heat exchanger tube
17 secondary inlet header, 18 one-level inlet header
19 flow control valve, 20 inlet air temp measuring point
21 booster fans
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment that states is merely to illustrate and explains the present invention, is not limited to the present invention.
In the present invention, in the case of contrary explanation is not made, the noun of locality such as " upper and lower, left and right " for using is typically referred to
Upper and lower, left and right shown in refer to the attached drawing." inside and outside " refers to the inside and outside of each part profile itself.
The present invention provides a kind of air-distribution device, and the air-distribution device can not only be played to flue gas and uniformly be acted on (i.e. to flue gas
Flow field is adjusted, and uneven flue gas is adjusted to the air-flow of flow velocity uniformity everywhere), and the temperature of flue gas can also be reduced
Degree, improves efficiency of dust collection.As shown in Figure 3 and Figure 4, the air-distribution device includes housing 3, and the housing 3 is with entering for being oppositely arranged
Gas port and gas outlet, the left end of housing 3 is air inlet in figure 3, and right-hand member is gas outlet, and arrow represents flue gas (containing dust)
Flow direction.M heat exchange tube layer is provided with housing 3, the plane at the M heat exchange tube layer place is parallel to each other, change described in each
Heat pipe layer includes multiple heat exchanger tubes 16 (as shown in Figure 4) that the plane being located along the heat exchange tube layer is arranged spaced reciprocally, per
The plane that the individual heat exchange tube layer is located is hung down with the distance between the air inlet and gas outlet direction (left and right directions in Fig. 3)
Directly, the two ends of each heat exchanger tube 16 are connected with the housing 3 respectively, and M is the positive integer more than or equal to 2, the value root of M
Need be 2,3,4,5,6 ... according to cloth wind.
Specifically, flue gas is entered after the air-distribution device from air inlet, adjusts flue gas stream using the gap between heat exchanger tube 16
The uniformity of field；Meanwhile, heat transferring medium is passed through in heat exchanger tube 16, by the heat exchange of the heat transferring medium in flue gas and heat exchanger tube 16
To reduce the temperature of flue gas, reduce the volume of flue gas.When the gas outlet of the air-distribution device is connected with the arrival end of electric cleaner,
As the volume of flue gas reduces, thus flow velocity of the flue gas in electric cleaner reduces, and flue gas is in the electric field of electric cleaner
The time of staying is extended, so as to improve efficiency of dust collection.
Wherein, heat exchanger tube 16 can be carbon steel light-wall pipe or stainless-steel thin-wall pipe, and the heat transferring medium in heat exchanger tube 16 is permissible
It is air or water etc..
Multiple heat exchanger tubes 16 in same heat exchange tube layer can become various ways with interval setting, as long as there is appropriate interval
Flue gas can be allowed by for example interlaced with each other or be set parallel to each other.Preferably, in the same heat exchange tube layer
Multiple heat exchanger tubes 16 are arranged in parallel to each other, the setting interlaced with each other of the heat exchanger tube 16 in two neighboring heat exchange tube layer.In order to
It is easy to description, before being defined as the left side of Fig. 3 herein, after right side is defined as, flue gas flows from front to back.Two neighboring herein change
The meaning of the heat exchanger tube 16 in heat pipe layer setting interlaced with each other is, the dead astern of the heat exchanger tube 16 in previous heat exchange tube layer
The interval between heat exchanger tube 16 in the rear heat exchange tube layer of correspondence；The interval between heat exchanger tube 16 in previous heat exchange tube layer
Dead astern correspond to heat exchanger tube 16 in a rear heat exchange tube layer, setting so interlaced with each other can be constantly changing the stream of air
Dynamic direction, so as to realize even flow field distribution.
Wherein, the M heat exchange tube layer constitutes N number of heat exchanger tube row, and each described heat exchanger tube row includes to be disposed adjacent
Multiple heat exchange tube layer, are spaced between N number of heat exchanger tube row, and N is the positive integer less than M.In the enforcement shown in Fig. 3
In mode, it is 3 that M is 10, N, has 10 heat exchange tube layer, 3 heat exchanger tubes rows, be followed successively by from left to right the first heat exchanger tube row, the
Two heat exchanger tubes row, the 3rd heat exchanger tube row, wherein, first heat exchanger tube row includes two heat exchange tube layer, second heat exchanger tube row's bag
Three heat exchange tube layer are included, the 3rd heat exchanger tube row includes five heat exchange tube layer.There is significantly interval between three heat exchanger tube rows.Cigarette
Gas sequentially passes through first heat exchange tube layer of first heat exchanger tube row and is distributed to the whole plane that first heat exchange tube layer is located
On (part in housing 3), the then uniform effect of second heat exchange tube layer again through first heat exchanger tube row, by cigarette
Each heat exchange tube layer that gas is arranged through each heat exchanger tube, final movable uniform air-flow.The air-distribution device is being carried out all to flue gas
While cloth, also with the wall contacts of heat exchanger tube 16 so that heat exchange is carried out, the effect of the temperature of reduction flue gas is realized.
Heat exchanger tube row can also need to arrange in a row, two rows, three rows, four rows or more according to actual heat exchange and cloth wind
Many.Heat exchange tube layer in each heat exchanger tube row can also according to actual heat exchange and cloth wind need to be arranged to one, two, three,
Four or more.
Housing 3 can be the shape that square tube, pipe etc. are suitable for.In the embodiment shown in Fig. 3, housing 3 is frustum
Shape, both ends open.Air inlet and gas outlet are located at the two ends of the housing 3 respectively, and in figure 3, air inlet is located at a left side for housing 3
End, gas outlet are located at the right-hand member of housing 3.The diameter with diameter greater than the air inlet of gas outlet, that is to say, that air inlet cut
Face area is more than the area of section of gas outlet.The size of the gas outlet of housing 3 is equivalently-sized with the air inlet of electric cleaner.
Wherein, the distance between central axis of adjacent two heat exchanger tube 16 in each described heat exchange tube layer is preferably
3～3.5 times of 16 radius of the heat exchanger tube, the equivalent percent opening of each heat exchange tube layer is 30%～36%.From air inlet
The pressure loss to gas outlet is not more than 50Pa, and the air-distribution device in present embodiment both can guarantee that flue gas swimmingly in each heat exchange
Flow between pipe row, the uniform effect to flue gas can be played again.
Wherein, the air-distribution device can also include one-level inlet header 18 outside the housing 3, primary outlet header
14th, multiple secondary inlet headers 17 and multiple secondary exit port headers 15, the two ends difference of each heat exchanger tube row are corresponding
The secondary inlet header 17 connect with the secondary exit port header 15, the inlet end of multiple secondary inlet headers 17 with
The outlet side connection of the one-level inlet header 18, the outlet side of multiple secondary exit port headers 15 is joined with the primary outlet
The inlet end connection of case 14.One end of each heat exchanger tube 16 is connected with secondary inlet header 17, the other end and secondary exit port header
15 connections.Secondary inlet header 17 and secondary exit port header 15 are connected with housing 3 respectively, it is preferable that 17 He of secondary inlet header
Secondary exit port header 15 adopts square tube, in order to weld with housing 3.Secondary inlet header 17 and secondary exit port header 15 can be adopted
Stainless steel or carbon steel are made.In order to ensure the stability of overall air-distribution device, secondary inlet header 17 and secondary exit port header
15 are all welded and fixed by ribs with housing 3.
The quantity of secondary inlet header 17 is equal to the quantity of secondary exit port header 15, and generally, secondary inlet header 17
Quantity be equal to heat exchanger tube row quantity be equal to secondary exit port header 15 quantity.In the present embodiment, secondary inlet header
17th, the quantity of secondary exit port header 15 and heat exchanger tube row is three, and one-level inlet header 18 and primary outlet header 14 are each
For one.Wherein, one-level inlet header 18 is arranged in the downside of three secondary inlet headers 17, connects all secondary inlet headers
17；Primary outlet header 14 is arranged in the upside of three secondary exit port headers 15, connects all of secondary exit port header 15.Two grades
The heat exchange in heat exchanger tube 16 in heat transferring medium flow velocity in inlet header 17 and secondary exit port header 15 and each heat exchanger tube row
Velocity of medium is equal.
Preferably, one-level inlet header 18, primary outlet header 14, multiple secondary inlet headers 17 and multiple secondary exit port
Header 15 is set to centrosymmetric structure.That is, secondary inlet header 17 and the one-level inlet header of one end connection arranged by heat exchanger tube
After 18 180 ° of the central rotations that arranges around the heat exchanger tube, the secondary exit port header 15 being connected with heat exchanger tube row's other end and one-level are gone out
Mouth header 14 overlaps.Each secondary exit port header 15 is identical structure and size respectively with each secondary inlet header 17, respectively
Individual one-level inlet header 18 and each primary outlet header 14 are also identical structure and size.Can be made using present embodiment
The pipe resistance characteristic of each heat exchanger tube row is identical, and the air velocity in the heat exchanger tube 16 of each heat exchanger tube row is identical, it is ensured that empty
It is equally distributed that gas flows through flow field when each heat exchanger tube is arranged, to play the effect of enhanced heat exchange.
One-level inlet header 18, primary outlet header 14, multiple secondary inlet headers 17 and multiple secondary exit port headers 15
May be disposed to the centrosymmetric structure of various ways, it is preferable that the one-level inlet header 18 and primary outlet header 14 are arranged
It is parallel with the length direction of the heat exchanger tube 16, the secondary inlet header 17 and secondary exit port header 15 are respectively perpendicular to institute
State one-level inlet header 18 and primary outlet header 14.Present embodiment describes the meaning of the centrosymmetric structure in detail with reference to Fig. 4
Think, as shown in Figure 4, the air of the inlet end of secondary inlet header 17 along secondary inlet header 17 length direction from bottom to top
Flowing (direction shown in arrow), the air in the secondary inlet header 17 can reach secondary exit port connection by different heat exchanger tubes 16
The outlet side of case 15, the distance passed by by the air of the outlet side for reaching secondary exit port header 15 by different heat exchanger tubes 16
Identical.Such as, distance L walked by the heat exchanger tube 16 of bottom by airUnderLength, heat exchanger tube equal to one-level inlet header 18
The length sum of 16 length, the length of secondary exit port header 15 and primary outlet header 14；And air changing by the top
Distance L walked by heat pipe 16OnLength equal to one-level inlet header 18, secondary inlet header 17, the length of heat exchanger tube 16 and one
The length sum of level outlet header 14；As the length of secondary exit port header 15 is equal to the length of secondary inlet header 17, therefore
LUnderEqual to LOn.
Wherein, the inlet end connection booster fan 21 of the one-level inlet header 18, outside air is through booster fan 21
Enter in one-level inlet header 18 after supercharging, the flowing by air in air-distribution device is lowered the temperature to flue gas.
In addition, the outlet side connection air preheater of the primary outlet header 14.After caloic is exchanged, the sky of intensification
In gas air inlet preheater, can be used to participate in combustion reaction.Present embodiment heat exchange is heated up after air to be passed through air pre-
Hot device, realizes flue gas cool-down UTILIZATION OF VESIDUAL HEAT IN, reduces the energy consumed due to preheated air, cost-effective.Preferably, one is grading
All heat-insulation layer is laid with the outer wall of mouth header 18, primary outlet header 14, secondary inlet header 17 and secondary exit port header 15,
To prevent radiation loss.
The present invention also provides a kind of smoke dust-removing equipment, and the smoke dust-removing equipment can be used for coal-burning power plant's dedusting, the flue gas
Cleaner includes flue gas air-distribution device, wherein, the flue gas air-distribution device 2 be according to air-distribution device of the present invention 2.
Wherein, the smoke dust-removing equipment includes electric cleaner 5, electric cleaner gas approach 1 and electric cleaner outlet cigarette
Road 10, the electric cleaner gas approach 1 are connected with the air inlet of the flue gas air-distribution device 2, the flue gas air-distribution device 2
Gas outlet is connected with the inlet end of the electric cleaner 5, the outlet side of the electric cleaner 5 and the electric cleaner exhaust pass
10 connections.The electric cleaner 5 can be electrostatic precipitator.
The air-distribution device 2 is used cooperatively with electric cleaner 5, and the flue gas that be passed through in electric cleaner 5 can not only be flowed
Field adjustment, while the temperature of flue gas can also be reduced, so as to reduce flue gas volume, delays flue gas in smoke dust-removing equipment main body
The time of staying, so as to improve efficiency of dust collection.Additionally, after flue gas cool-down, the ratio resistance of the dust in flue gas reduces, beneficial to ash
Dirt is charged, strengthens the electrostatic field in electric cleaner 5 so that dust can obtain efficient removal.
Through overtesting, when the flow velocity of the air in heat transferring medium is 10～13m/s, through 16 wall forced heat-exchanging of heat exchanger tube
The heat of flue gas is absorbed, the air in heat exchanger tube 16 can heat up 5～15 DEG C, and the flue-gas temperature at the gas outlet of housing 3 can reduce
20～30 DEG C, the flue gas volume of electric cleaner entrance reduces 5～10%, can improve 0.2～0.3% so as to efficiency of dust collection.
Wherein, the smoke dust-removing equipment is included positioned at the outer one-level inlet header (18) of the housing (3), primary outlet connection
Case (14), multiple secondary inlet headers (17) and multiple secondary exit port headers (15), the two ends difference of each heat exchanger tube row
Corresponding secondary inlet header (17) are connected with secondary exit port header (15), multiple secondary inlet headers
(17) inlet end is connected with the outlet side of one-level inlet header (18), the giving vent to anger of multiple secondary exit port header (15)
End is connected with the inlet end of primary outlet header (14)；The one end of each heat exchanger tube (16) and secondary inlet header 17
Connection, the other end are connected with secondary exit port header (15)；The one-level inlet header 18 is provided with flow control valve 19；The flow
Regulating valve 19 is for adjusting the flow of the heat transferring medium being passed through in heat exchanger tube 16.When flow control valve 19 opens big, heat exchanger tube is passed through
The flow of the heat transferring medium in 16 is big, and heat exchanger tube 16 is stronger with the heat exchange action of flue gas, and it is more that flue-gas temperature reduces；Instead
It, hour opened by flow control valve 19, and the flow of the heat transferring medium being passed through in heat exchanger tube 16 is little, the heat exchange of heat exchanger tube 16 and flue gas
Effect is on the weak side, and what flue-gas temperature reduced lacks.
The smoke dust-removing equipment also includes cigarette temperature feedback attemperating unit, and the cigarette temperature feedback attemperating unit is used for feedback regulation
The flow of the heat transferring medium in heat exchanger tube 16.The cigarette temperature feedback attemperating unit includes to be arranged on the electric cleaner gas approach
Electric cleaner inlet flue gas temperature measuring point 12, the electric cleaner outlet cigarette temperature being arranged on the electric cleaner exhaust pass 10 on 1
Measuring point 6, the inlet air temp measuring point 20 being arranged on the one-level inlet header 18, it is arranged on the primary outlet header 14
On air exit temp measuring point 13 and controller, the controller respectively with the electric cleaner inlet flue gas temperature measuring point 12, electricity
House outlet cigarette temperature measuring point 6, inlet air temp measuring point 20, air exit temp measuring point 13 and flow control valve 19 are electrically connected
Connect, the controller enters for receiving the electric cleaner inlet flue gas temperature measuring point 12, electric cleaner outlet cigarette temperature measuring point 6, air
Mouth temperature point 20, the temperature information of the transmission of air exit temp measuring point 13 simultaneously control the flow to adjust according to the temperature information
The aperture of section valve 19, to increase or reduce the flow of heat transferring medium (as air), it is ensured that whole equipment is under optimal operating mode
Operation.
Wherein, electric cleaner inlet flue gas temperature measuring point 12, electric cleaner outlet cigarette temperature measuring point 6, inlet air temp measuring point 20
Thermocouple be may each be with air exit temp measuring point 13.
Wherein, the smoke dust-removing equipment includes cleaner, and the cleaner includes to connect with the air-distribution device 2
Soot blower 11 and be connected to the first ash bucket 9 of 2 bottom of the air-distribution device, the soot blower 11 is described for being deposited in
During dust in air-distribution device 2 is purged to first ash bucket 9.Present embodiment passes through device soot blower 11, near can sink
Drop is blown off to the first ash bucket 9 in other dusts in heat exchanger tube 16 and housing 3, prevents blocking and the problems such as dust stratification,
Especially for the flue gas containing high-sulfur high viscosity dust, it is ensured that the long-term continuous reliability service of equipment.Wherein, the knot of soot blower 11
Structure is prior art, and the present invention is without limitation.
Wherein, the smoke dust-removing equipment includes the Distributed Control System (DCS system) electrically connected with the soot blower 11,
The Distributed Control System is used for soot blower 11 described in the automatic of interval at preset timed intervals.Start the soot blower 11 by being spaced,
Ensure that flow of flue gas is using smooth in air-distribution device.
Wherein, 5 bottom of the electric cleaner is provided with the second ash bucket 7, first ash bucket 9 and second ash bucket 7 all with
Pneumatic conveyer 8 connects, and the Pneumatic conveyer 8 is used for the dust in first ash bucket 9 and second ash bucket 7
It is delivered to outside the smoke dust-removing equipment.
The specific work process of smoke dust-removing equipment, below by taking the smoke dust-removing equipment shown in Fig. 3 and Fig. 4 as an example, is described：
Flue gas is entered in air-distribution device 2, passes sequentially through first heat exchange in order through the inlet flue duct 1 of electric cleaner
Pipe row, second heat exchanger tube row and the 3rd heat exchanger tube row, flue gas flow through the gap between the heat exchanger tube 16 in each heat exchanger tube row
When, the aggravation of one side turbulent flow improves heat transfer effect, on the other hand passes through the conversion between the change of flow direction and sound pressure energy,
Realize even flow field distribution.Outside air sends into one-level inlet header 18 by booster fan, by three secondary inlet headers 17
In the heat exchanger tube 16 entered after shunting in each heat exchanger tube row, air in heat exchanger tube 16 is turbulence state, flue gas heat through with change
The thin transmission of heat by contact of heat pipe 16, the air themperature in heat exchanger tube 16 are stepped up in tube side, are entered secondary exit port header 15 and are converged
After conjunction, primary outlet header 14 is sequentially entered, the hot-air of intensification is entered in air preheater, and the caloic for completing air and flue gas is handed over
Change.Because repeatedly turning between heat exchanger tube 16 and lowering the temperature, part soot dust granule thing is deposited in and changes the soot dust granule thing that flue gas is carried
On the surface of heat pipe 16, the soot blower 11 that started by fixed intervals, the soot dust granule thing of sedimentation is blown off to the first ash bucket 9
Interior, air-distribution device is discharged by pneumatic ash conveying plant 8, complete air deashing process.Flue gas is entered by the gas outlet of air-distribution device 2
After entering deduster 5, DC high-voltage power supply enters electric cleaner 5, in the presence of electric field force, flue dust through high-tension electricity input system 4
After particulate matter is captured, fall in the second ash bucket 7, electric cleaner 5 is discharged through pneumatic ash conveying plant 8, complete flue gas ash removal process.
When boiler load changes, when exhaust gas volumn occurs significantly to change, by electric cleaner inlet flue gas temperature measuring point 12, electric precipitation
The temperature signal that device outlet cigarette temperature measuring point 6, inlet air temp measuring point 20, air exit temp measuring point 13 feed back, adjusts flow
Control valve 19, controls the flue-gas temperature of 5 porch of electric cleaner to be slightly above acid dew-point temperature all the time, prevents less than acid dew point temperature
Degree causes follow-up equipment flue cold end corrosion.
Specifically, when boiler load diminishes, when exhaust gas volumn reduces, electric cleaner inlet flue gas temperature measuring point 12, electric cleaner goes out
The temperature that mouth cigarette temperature measuring point 6, inlet air temp measuring point 20 and air exit temp measuring point 13 are measured is all low, now controller
After receiving the low signal of temperature, the aperture of flow control valve 19 is turned in control down, reduces the air capacity for participating in that caloic is exchanged,
The flue-gas temperature of 5 porch of electric cleaner is made to be slightly above acid dew-point temperature (generally 95～110 DEG C between) and ensure.When boiler is negative
Lotus becomes big, and when exhaust gas volumn subtracts big, electric cleaner inlet flue gas temperature measuring point 12, electric cleaner exports cigarette temperature measuring point 6, inlet air temp
The temperature that measuring point 20 and air exit temp measuring point 13 are measured is all higher, after now controller receives the signal of temperature drift,
Control tunes up the aperture of flow control valve 19, increases the air capacity for participating in that caloic is exchanged, makes the flue gas of 5 porch of electric cleaner
The temperature of temperature reduction to slightly above acid dew point (generally 95～110 DEG C between).
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, multiple letters can be carried out to technical scheme
Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to various can
The combination of energy is no longer separately illustrated.
Additionally, can also be combined between a variety of embodiments of the present invention, as long as which is without prejudice to this
The thought of invention, its should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of air-distribution device, including housing (3), described housing (3) have the air inlet and gas outlet being oppositely arranged, its feature
It is, is provided with M heat exchange tube layer in housing (3), the plane at the M heat exchange tube layer place is parallel to each other, described in each
Heat exchange tube layer includes multiple heat exchanger tubes (16) that the plane being located along the heat exchange tube layer is arranged spaced reciprocally, each described heat exchange
The plane that tube layer is located is vertical with the distance between the air inlet and gas outlet direction, the two ends of each heat exchanger tube (16)
It is connected with the housing (3) respectively, M is the positive integer more than 2；
The M heat exchange tube layer constitutes N number of heat exchanger tube row, and what each described heat exchanger tube row included to be disposed adjacent multiple described changes
Heat pipe layer；It is spaced between N number of heat exchanger tube row, N is the positive integer less than M；
Multiple heat exchanger tubes (16) in the same heat exchange tube layer are arranged in parallel to each other, the institute in two neighboring heat exchange tube layer
State heat exchanger tube (16) setting interlaced with each other；
The air-distribution device also includes：Positioned at the outer one-level inlet header (18) of the housing (3), primary outlet header (14),
Multiple secondary inlet header (17) and multiple secondary exit port headers (15), the two ends difference of each heat exchanger tube row are corresponding
Secondary inlet header (17) connect with secondary exit port header (15), the entering of multiple secondary inlet header (17)
Gas end is connected with the outlet side of one-level inlet header (18), the outlet side of multiple secondary exit port header (15) with described
The inlet end connection of primary outlet header (14)；
The one end of each heat exchanger tube (16) is connected with secondary inlet header (17), and the other end is with secondary exit port header (15) even
Logical；
One-level inlet header (18) and primary outlet header (14) are arranged as putting down with the length direction of the heat exchanger tube (16)
OK, described secondary inlet header (17) and secondary exit port header (15) is respectively perpendicular to one-level inlet header (18) and one-level
Outlet header (14).
2. air-distribution device according to claim 1, it is characterised in that described housing (3) are frustoconical, the air inlet
The two ends of housing (3), and the diameter with diameter greater than the air inlet of the gas outlet are located at gas outlet respectively.
3. air-distribution device according to claim 1, it is characterised in that adjacent two in each described heat exchange tube layer change
The distance between central axis of heat pipe (16) is 3～3.5 times of heat exchanger tube (16) radius.
4. air-distribution device according to claim 1, it is characterised in that the inlet end connection of one-level inlet header (18)
Booster fan (21), the outlet side connection air preheater of primary outlet header (14).
5. a kind of smoke dust-removing equipment, including flue gas air-distribution device, it is characterised in that the flue gas air-distribution device be according to right
Require the air-distribution device any one of 1-4.
6. smoke dust-removing equipment according to claim 5, it is characterised in that the smoke dust-removing equipment includes electric cleaner
(5), electric cleaner gas approach (1) and electric cleaner exhaust pass (10), electric cleaner gas approach (1) and the cigarette
The air inlet connection of gas air-distribution device (2), the gas outlet of flue gas air-distribution device (2) and the air inlet of the electric cleaner (5)
End connection, the outlet side of electric cleaner (5) is connected with electric cleaner exhaust pass (10).
7. smoke dust-removing equipment according to claim 6, it is characterised in that one-level inlet header (18) are provided with stream
Adjustable valve (19)；
The smoke dust-removing equipment also includes cigarette temperature feedback attemperating unit, described in cigarette temperature feedback attemperating unit includes to be arranged on
Electric cleaner inlet flue gas temperature measuring point (12) on electric cleaner gas approach (1), it is arranged on the electric cleaner exhaust pass
(10) electric cleaner outlet cigarette temperature measuring point (6), the inlet air temp being arranged on one-level inlet header (18) on is surveyed
Point (20), the air exit temp measuring point (13) being arranged on primary outlet header (14) and controller, the controller
Respectively with electric cleaner inlet flue gas temperature measuring point (12), electric cleaner outlet cigarette temperature measuring point (6), inlet air temp measuring point
(20), air exit temp measuring point (13) and flow control valve (19) electrical connection, the controller are removed for receiving the electricity
Dirt device inlet flue gas temperature measuring point (12), electric cleaner outlet cigarette temperature measuring point (6), inlet air temp measuring point (20), air outlet slit temperature
Spend measuring point (13) temperature information for sending the aperture for controlling flow control valve (19) according to the temperature information.
8. the smoke dust-removing equipment according to claim 6 or 7, it is characterised in that the smoke dust-removing equipment includes dedusting
Equipment, the cleaner are included the soot blower (11) connected with flue gas air-distribution device (2) and are connected to the flue gas
First ash bucket (9) of air-distribution device (2) bottom, described soot blower (11) are used for be deposited in flue gas air-distribution device (2)
Dust purge to the first ash bucket (9).
9. smoke dust-removing equipment according to claim 8, it is characterised in that the smoke dust-removing equipment includes to blow with described
The Distributed Control System that grey device (11) electrically connect, the Distributed Control System are used for soot blowing described in the automatic of interval at preset timed intervals
Device (11).
10. smoke dust-removing equipment according to claim 8, it is characterised in that electric cleaner (5) bottom is provided with second
Ash bucket (7), the first ash bucket (9) and second ash bucket (7) are all connected with Pneumatic conveyer (8), the Geldart-D particle
Device (8) is used for the dust in the first ash bucket (9) and second ash bucket (7) to be delivered to outside the smoke dust-removing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410545056.5A CN104258993B (en) | 2014-10-15 | 2014-10-15 | Air-distribution device and the smoke dust-removing equipment with the air-distribution device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410545056.5A CN104258993B (en) | 2014-10-15 | 2014-10-15 | Air-distribution device and the smoke dust-removing equipment with the air-distribution device |
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| CN104258993A CN104258993A (en) | 2015-01-07 |
| CN104258993B true CN104258993B (en) | 2017-03-08 |
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| CN201410545056.5A Active CN104258993B (en) | 2014-10-15 | 2014-10-15 | Air-distribution device and the smoke dust-removing equipment with the air-distribution device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108097463A (en) * | 2018-01-18 | 2018-06-01 | 福建龙净环保股份有限公司 | A kind of energy-efficient electric precipitator |
| CN110038391B (en) * | 2019-05-06 | 2021-08-27 | 国家能源投资集团有限责任公司 | Powder active coke moving bed desulfurizing device |
| CN110354993A (en) * | 2019-07-21 | 2019-10-22 | 天津大学 | A kind of residual-heat used type electric dust separator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5792238A (en) * | 1995-12-01 | 1998-08-11 | The Babcock & Wilcox Company | Fine-particulate and aerosol removal technique in a condensing heat exchanger using an electrostatic system enhancement |
| CN201154325Y (en) * | 2008-02-12 | 2008-11-26 | 张寅啸 | Heat-exchange electric dust remover |
| CN101846382A (en) * | 2010-06-07 | 2010-09-29 | 党军 | Heat exchanger |
| CN101871734A (en) * | 2010-06-09 | 2010-10-27 | 常熟市凯迪装饰材料有限公司 | Heat exchange device and waste gas purification system with same |
| CN201974095U (en) * | 2011-02-22 | 2011-09-14 | 浙江佳为环境科技有限公司 | Sealing device for water evaporation and refrigeration tube heat exchanger |
| CN102284361B (en) * | 2011-06-15 | 2013-12-04 | 福建龙净环保股份有限公司 | Flue gas dust removal system and electric dust remover thereof |
| CN102607010B (en) * | 2012-03-21 | 2014-09-10 | 长春当代信息产业集团有限公司 | Composite phase-change heat exchange system |
| CN103615923B (en) * | 2013-11-21 | 2015-10-21 | 中国电力工程顾问集团中南电力设计院 | Novel needle plate coupled mode heat conduction reinforced element and special-shaped tube panel formula water pipe heat exchanger |
| CN103639043B (en) * | 2013-11-29 | 2015-12-16 | 山东大学 | A kind of synergistic fine particle removal method of many/power and device |
| CN103994458B (en) * | 2014-06-11 | 2016-07-06 | 上海中源科扬节能技术有限公司 | Complex phase-change heat exchanger suitable in fired power generating unit |
| CN204107655U (en) * | 2014-10-15 | 2015-01-21 | 神华集团有限责任公司 | Air-distribution device and there is the smoke dust-removing equipment of this air-distribution device |
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Address after: 100011 Beijing, Dongcheng District Anwai Binhe West Road No. 22 Shenhua building Applicant after: Shenhua Group Co., Ltd. Applicant after: CHINA ENERGY SAVING REDUCTION CO., LTD. Applicant after: Shandong Shenhua Shan great energy environment Co., Ltd Address before: 100011 Beijing, Dongcheng District Anwai Binhe West Road No. 22 Shenhua building Applicant before: Shenhua Group Co., Ltd. Applicant before: CHINA ENERGY SAVING REDUCTION CO., LTD. Applicant before: Shandong Shandong University Energy Environment Co., Ltd. |
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