CN203533582U - Fly ash separating and conveying system for coal economizer - Google Patents
Fly ash separating and conveying system for coal economizer Download PDFInfo
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- CN203533582U CN203533582U CN201320479849.2U CN201320479849U CN203533582U CN 203533582 U CN203533582 U CN 203533582U CN 201320479849 U CN201320479849 U CN 201320479849U CN 203533582 U CN203533582 U CN 203533582U
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- fly ash
- ash
- flying dust
- air
- economizer
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Abstract
The utility model relates to a fly ash separating and conveying system for a coal economizer. The fly ash separating and conveying system for the coal economizer is used in the fly ash separation technology for tail smoke of a large-scale utility boiler. One end of an outlet flue of an air pre-heater is communicated with a smoke outlet of an ash bucket separation device, and the other end of the outlet flue of the air pre-heater is communicated with an electric precipitator. A fly ash conveying groove is arranged in an inclined mode, one end of the fly ash conveying groove is communicated with an ash discharge device, and the other end of the fly ash conveying groove is communicated with an ash storage bin. The fly ash conveying groove comprises an air chute and a disturbing air device. Fly ash disturbing holes are respectively formed in the two sides of the fly ash conveying groove, one ends of the fly ash disturbing holes are communicated with the air chute, and the other ends of the fly ash disturbing holes are communicated with the disturbing air device. The disturbing air device is communicated with a hot secondary air pipeline of an outlet of the air pre-heater. One end of a connection channel is communicated with the ash storage bin, and the other end of the connection channel is communicated with the electric precipitator. The fly ash separating and conveying system can separate large-particle fly ash in the tail combustion smoke of the boiler from main stream smoke, and the separated fly ash can be conveyed to the safe position in a safe, environment-friendly and efficient mode.
Description
Technical field
The utility model relates to the separated induction system of economizer flying dust, in large-sized station boiler tail flue gas flying dust isolation technics.
Background technology
Because coal supply and demand is nervous, it is larger that large-scale coal fired power generation unit uses fuel off-design value, coal-fired calorific value is on the low side, ash increases, cause after coal combustion in flue gas flying dust especially bulky grain flying dust share increase, especially Some Domestic designed combustion low ash coal kind boiler does not just design economizer hopper and economizer hopper induction system fault unit in design, after in running, in flue gas, bulky grain flying dust increases, to washing away of air preheater heat accumulating element, serious wear, unit operation is after a period of time, the air preheater heat accumulating element wearing and tearing of hot junction, upper strata are broken into after fragment, gap to lower end heat accumulating element comes off, damaged heat accumulating element enters after the heat accumulating element layer of middle part, exhaust gases passes is stopped up, cause air preheater resistance increment, the unplugged heat accumulating element of part region forms flue gas corridor, aggravate the wearing and tearing of this region heat accumulating element, finally cause the exchange capability of heat of air preheater heat accumulating element to decline, resistance increment, exhaust gas temperature increases, heat loss due to exhaust gas increases, the consumption rate of air-introduced machine increases, affect the safety of unit, economical, efficient operation.Now moving flying dust concentration in the actual flue gas of large electric power plant unit, higher than electric precipitation design entry flying dust concentration, causes the efficiency of dust collection of actual electrical dedusting can not meet environmental requirement lower than 20mg/Nm
3, existing Generator Set is carried out electrostatic fabric filter transformation in order to meet environmental requirement, more than electrostatic fabric filter transformation has not only increased air and gas system resistance 1000Pa, needs supportingly to carry out air-introduced machine capacity-increasing transformation simultaneously, and has increased the operating cost of electric precipitation.The economizer bulky grain flying dust of existing unit design first separation enters economizer hopper, then by storehouse pump, be transported to grey storehouse, in actual moving process, bulky grain flying dust easily causes pipe wear in by Pneumatic ash conveying course of conveying, stop up, cause this economizer ash-transmission system fault, in flue gas, bulky grain flying dust can not be effectively separated.
Applicant has the utility model patent that the patent No. is 201220212214.1, name is called Rear of Utility Boiler fume duct fly ash separator, this Rear of Utility Boiler fume duct fly ash separator, comprise corrugated sheet device, corrugated sheet, ash bucket, described corrugated sheet device is fixedly mounted in the vertical gas pass of economizer exit position, on corrugated sheet device, be provided with corrugated corrugated sheet, the setting of described corrugated sheet symmetry, described ash bucket is arranged in horizontal flue, described ash bucket be positioned at corrugated sheet device under.This utility model has reasonable in design, flying dust good separating effect, alleviates the dedusting pressure of electric precipitation, reduces consumption rate, simple advantage efficiently.
Utility model content
The purpose of this utility model is to overcome above shortcomings in prior art, and the separated induction system of the economizer flying dust that a kind of reasonable in design is provided, can bulky grain flying dust in boiler combustion tail flue gas is separated from main flume, and separated flying dust can safety, environmental protection, be efficiently delivered to home.
The technical scheme in the invention for solving the above technical problem is: the separated induction system of economizer flying dust, comprise ash bucket separator, fly ash carry device, store up grey storehouse, electric cleaner, air preheater; Ash bucket separator comprises corrugated sheet device, corrugated sheet, ash bucket, ash exhauster, described corrugated sheet device is fixedly mounted in vertical gas pass, on corrugated sheet device, be provided with corrugated corrugated sheet, described corrugated sheet is symmetrical arranged, described ash bucket is arranged on horizontal flue below, described ash bucket be positioned at corrugated sheet device under, described ash exhauster is arranged on the below of ash bucket; Ash bucket separator is also provided with the exhanst gas outlet of horizontal flue, and exhanst gas outlet and ash bucket are separated; The exhanst gas outlet of air preheater exhaust pass one end and ash bucket separator is connected, and the other end and electric cleaner are connected;
It is characterized in that: also comprise fly ash carry groove and interface channel; Fly ash carry groove is obliquely installed, and its one end and ash exhauster are connected, and the other end is connected with the grey storehouse of storage; Described fly ash carry groove comprises air flume and disturbance wind apparatus, and fly ash carry trench bottom offers flying dust disturbance hole, and flying dust disturbance hole communicates with disturbance wind apparatus; The hot Secondary Air pipeline of disturbance wind apparatus and air preheater outlet is connected; Yu Chuhui storehouse, interface channel one end is connected, and the other end and electric cleaner are connected.
Fly ash carry trench bottom described in the utility model both sides offer respectively 5 flying dust disturbance holes.
Flying dust disturbance bore dia described in the utility model is 100mm.
Fly ash carry angle of groove inclination degree described in the utility model is greater than the angle of resting in peace of fly ash granule.
The top in Yu Chuhui storehouse, fly ash carry groove described in the utility model one end is connected.
The groove face cross section of fly ash carry groove described in the utility model is V-arrangement.
The groove face cross section of air flume described in the utility model is V-arrangement.
The utility model is installed manual inserting plate door and the first electric lock pneumatic device between ash bucket and ash exhauster, and the first electric lock pneumatic device is arranged on moving insertion plate door top.
The utility model is provided with the second electric lock pneumatic device in the centre of the grey storehouse of storage and fly ash carry groove link position.
The utility model compared with prior art, have the following advantages and effect: effective bulky grain flying dust in separate boiler combustion product gases, in time bulky grain flying dust safety, economy are transferred out, avoid heating surface wear, the obstructions etc. such as afterbody air preheater accumulation of heat original paper, delay the wearing and tearing of denitrating catalyst; Strengthen flue gas and enter SCR system flow field uniformity, improve denitration efficiency; Can reduce flying dust concentration in flue gas, reduce dust emission concentration in electric precipitation outlet flue gas simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
The specific embodiment
Below in conjunction with accompanying drawing and by embodiment, the utility model is described in further detail, and following examples are to explanation of the present utility model and the utility model is not limited to following examples.
Referring to Fig. 1, the utility model embodiment comprises ash bucket separator 2, air preheater 8, fly ash carry groove 9, stores up grey storehouse 12, interface channel 13, electric cleaner 14.
Ash bucket separator 2 comprises corrugated sheet device 3, corrugated sheet 4, ash bucket 6, ash exhauster 7.Corrugated sheet device 3 is fixedly mounted in vertical gas pass 1, on corrugated sheet device 3, be provided with corrugated corrugated sheet 4, corrugated sheet 4 is symmetrical arranged, and ash bucket 6 is arranged in horizontal flue 4, ash bucket 6 be positioned at corrugated sheet device 3 under, ash exhauster 7 is arranged on the below of ash bucket 6; Ash bucket separator 2 is also provided with the exhanst gas outlet 5 of horizontal flue 4, and exhanst gas outlet 5 is separated with ash bucket 6.After the structure of corrugated sheet 4 can guarantee flyash impact corrugated sheet 7, energy Automatic-falling, to ash bucket 6, guarantees that flying dust can not be residual on corrugated sheet 4.The quantity of corrugated sheet 4 is even number, and two ends, left and right corrugated sheet 4 is layout symmetrically and evenly, the region that can fall the side that keeps left after corrugated sheet 4 flying dusts in right side separate.The quantity that control waveform plate 4 is arranged, guarantees that the pressure reduction of corrugated sheet 4 front and back is lower than 200Pa.Corrugated sheet 4 outsourcing clad cans are that straight line or camber line are arranged.The utility model patent that the patent No. that ash bucket separator 23 concrete structures and operation principle have referring to applicant is 201220212214.1, name is called Rear of Utility Boiler fume duct fly ash separator.
The exhanst gas outlet 5 of air preheater exhaust pass 15 one end and ash bucket separator 2 is connected, and the other end and electric cleaner 14 are connected.15 effects of air preheater exhaust pass are air preheater to be exported to flue gas be delivered to electric cleaner 14.Air preheater 8 effect be by accumulation of heat original paper rotation in air preheater 8 by transfer of heat in flue gas to heat in air, add heat primary air and Secondary Air, wherein a wind after heating is used for pulverized coal conveying, Secondary Air after heating directly enters boiler auxiliary combustion, and in disturbance wind apparatus 10, disturbance wind derives from air preheater and exports hot Secondary Air pipeline.
Fly ash carry groove 9 comprises air flume 11 and disturbance wind apparatus 10.
The groove face cross section of air flume 11 is V-arrangement, facilitates fly ash carry.Fly ash carry groove 9 one end and ash exhauster 7 are connected, the other end is connected with the grey storehouse 12 of storage, bulky grain flying dust adopts air flume 11 pneumatic conveying modes, ash in economizer hopper 6 is delivered to the grey storehouse 12 of storage, by grey tank car, transport outward, due to approximately 300 ℃ of the ash temperature of carrying, therefore fly ash carry groove 9 is selected high temperature resistant fluidized plate, air flume 11 integral body install heat-insulation layer additional.
Fly ash carry groove 9 two bottom sides offer respectively the flying dust disturbance hole that 5 diameters are 100mm, and one end, flying dust disturbance hole communicates with air flume 11, and the other end communicates with disturbance wind apparatus 10.
Fly ash carry groove 9 is obliquely installed, and angle of inclination is greater than the angle of resting in peace of fly ash granule, guarantees the abundant fluidisation of flying dust, and under ash bucket, ash is unobstructed, smooth and easyly enters into grey storehouse.As because position reason fly ash carry groove 9 setting angles are less than flying dust angle of repose, need to increase flying dust disturbance bore dia, guarantee the abundant fluidisation of flying dust, under ash bucket, ash is unobstructed.
The top in interface channel 13 Yu Chuhui storehouses, one end 12 is connected, and the other end is connected by afterbody and the electric cleaner 14 of air preheater exhaust pass 15.The effect of interface channel 13 is that electric cleaner 14 entrances are directly introduced in storage grey storehouse 12 exhausts, electric cleaner 14 makes need to bag-type dust equipment be installed in the grey storehouse 12 of storage, storing up the interior air in grey storehouse 12 is drawn in the afterbody of air preheater exhaust pass 15 by electric cleaner 14 gas approach negative pressure, enter into again after electric cleaner 14 dedustings, be disposed in atmosphere.
Manual inserting plate door and the first electric lock pneumatic device are installed between ash bucket 6 and ash exhauster 7, and the first electric lock pneumatic device is arranged on moving insertion plate door top, and manual inserting plate door is used for opening and closing ash bucket 6, the first electric lock pneumatic devices and is used for locking gas and dosing use.
The second electric lock pneumatic device is arranged on the centre of storage 12 tops, grey storehouse and fly ash carry groove 9 afterbody link positions, and the second electric lock pneumatic device is used for locking gas and dosing is used.
After stove, on road, establish a 200m
3 storage ash storehouse 12, store up 12 bottoms, grey storehouse pneumatic ash-removing valve be installed, below bulk cement truck arrives grey storehouse, open pneumatic ash-removing valve, ash in grey storehouse is delivered into bulk cement truck ash can inner.High and low level-sensing device is established in ash storehouse; Store up 12 tops, grey storehouse and establish a pressure safety valve, when the grey storehouse of storage, 12 internal pressures surpass design critical pressure, open pressure safety valve pressure release, avoid 12 grey storehouse blasts.Store up grey storehouse 12 and do not establish sack cleaner, its exhaust directly causes electric cleaner 14 entrances; Bottom of the reservior insulation, does not establish gasification board; Use electric cleaner and boiler platform, in Hui Ku side, establish staircase, to 6 meters, grey storehouse platform and Ku Ding.
Coal-fired at present supply falls short of demand, and ature of coal is changeable, and the design rating of system should suitably strengthen, and leaves enough surpluses, avoids occurring that grey amount strengthens and exerting oneself not of system, then occurs the full grey security incident of collapsing of being pressed by ash of ash bucket.
Storing up 12 tops, grey storehouse, fly ash carry groove 9 ends enters 12 entry positions, the grey storehouse of storage inlet valves is installed; On ash bucket 6 below ash tubes, outlet valve is installed.Because the theoretical temperatures of economizer ash reaches 400 ℃ of left and right, characteristic high temperature resistant, high pressure that inlet valve, outlet valve not only possess, and possess the sealing property that antiwear characteristic guarantees system.
Ash tube, telescopic joint are positioned at the below of ash bucket 6, ash exhauster 7 tops.Because economizer hopper 6 can produce larger thermal walking when hot, radially, axially can reach 150 mm and 280 mm, so telescopic joint on ash tube, can not adopt the expansion joint of common form, can only adopt and integrate flexible and distortion, possess the combined type expansion joint that absorbs three-dimensional thermal walking, fully to absorb the swell increment of ash bucket thermal walking.
In addition, it should be noted that, the specific embodiment described in this description, the shape of its parts and components, institute's title of being named etc. can be different, and the above content described in this description is only to the explanation of the utility model structure example.
Claims (10)
1. the separated induction system of economizer flying dust, comprises ash bucket separator, stores up grey storehouse, electric cleaner, air preheater; Ash bucket separator comprises corrugated sheet device, corrugated sheet, ash bucket, ash exhauster, described corrugated sheet device is fixedly mounted in vertical gas pass, on corrugated sheet device, be provided with corrugated corrugated sheet, described corrugated sheet is symmetrical arranged, described ash bucket is arranged on horizontal flue below, described ash bucket be positioned at corrugated sheet device under, described ash exhauster is arranged on the below of ash bucket; The exhanst gas outlet of air preheater exhaust pass one end and ash bucket separator is connected, and the other end and electric cleaner are connected;
It is characterized in that: also comprise fly ash carry groove and interface channel; Fly ash carry groove is obliquely installed, and its one end and ash exhauster are connected, and the other end is connected with the grey storehouse of storage; Described fly ash carry groove comprises air flume and disturbance wind apparatus, and fly ash carry trench bottom both sides offer respectively flying dust disturbance hole, and one end, flying dust disturbance hole communicates with air flume, and the other end communicates with disturbance wind apparatus; The hot Secondary Air pipeline of disturbance wind apparatus and air preheater outlet is connected; Yu Chuhui storehouse, interface channel one end is connected, and the other end and electric cleaner are connected.
2. the separated induction system of economizer flying dust according to claim 1, is characterized in that: described fly ash carry trench bottom both sides offer respectively 5 flying dust disturbance holes.
3. the separated induction system of economizer flying dust according to claim 1, is characterized in that: described flying dust disturbance bore dia is 100mm.
4. the separated induction system of economizer flying dust according to claim 1, is characterized in that: the secondary hot-air access air flume that described flying dust disturbance wind exports by air preheater.
5. the separated induction system of economizer flying dust according to claim 1, is characterized in that: described fly ash carry angle of groove inclination degree is greater than the angle of resting in peace of fly ash granule.
6. the separated induction system of economizer flying dust according to claim 1, is characterized in that: the top in described Yu Chuhui storehouse, fly ash carry groove one end is connected.
7. the separated induction system of economizer flying dust according to claim 1, is characterized in that: the groove face cross section of described air flume is V-arrangement.
8. the separated induction system of economizer flying dust according to claim 1, is characterized in that: described storage Hui Ku top is connected with electric precipitation entrance by interface channel.
9. the separated induction system of economizer flying dust according to claim 1, is characterized in that: manual inserting plate door and the first electric lock pneumatic device are installed between ash bucket and ash exhauster, and the first electric lock pneumatic device is arranged on moving insertion plate door top.
10. the separated induction system of economizer flying dust according to claim 1, is characterized in that: the centre at the grey storehouse of storage and fly ash carry groove link position is provided with the second electric lock pneumatic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320479849.2U CN203533582U (en) | 2013-08-07 | 2013-08-07 | Fly ash separating and conveying system for coal economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320479849.2U CN203533582U (en) | 2013-08-07 | 2013-08-07 | Fly ash separating and conveying system for coal economizer |
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| Publication Number | Publication Date |
|---|---|
| CN203533582U true CN203533582U (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320479849.2U Expired - Lifetime CN203533582U (en) | 2013-08-07 | 2013-08-07 | Fly ash separating and conveying system for coal economizer |
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| CN (1) | CN203533582U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438469A (en) * | 2013-08-07 | 2013-12-11 | 华电电力科学研究院 | Fly ash separating and conveying system of economizer |
| CN107970708A (en) * | 2017-11-30 | 2018-05-01 | 成都易态科技有限公司 | High-temperature dust removal ash afterheat utilizing system |
-
2013
- 2013-08-07 CN CN201320479849.2U patent/CN203533582U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438469A (en) * | 2013-08-07 | 2013-12-11 | 华电电力科学研究院 | Fly ash separating and conveying system of economizer |
| CN103438469B (en) * | 2013-08-07 | 2015-09-02 | 华电电力科学研究院 | A kind of economizer flying dust is separated induction system |
| CN107970708A (en) * | 2017-11-30 | 2018-05-01 | 成都易态科技有限公司 | High-temperature dust removal ash afterheat utilizing system |
| CN107970708B (en) * | 2017-11-30 | 2023-07-04 | 成都易态科技有限公司 | High-temperature dedusting ash waste heat utilization system |
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