CN205690963U - Rotary regenerative air preheater and high-head low discharge non-isolated on-line cleaning device thereof - Google Patents
Rotary regenerative air preheater and high-head low discharge non-isolated on-line cleaning device thereof Download PDFInfo
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- CN205690963U CN205690963U CN201620380054.XU CN201620380054U CN205690963U CN 205690963 U CN205690963 U CN 205690963U CN 201620380054 U CN201620380054 U CN 201620380054U CN 205690963 U CN205690963 U CN 205690963U
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- air preheater
- line cleaning
- soot blower
- rotary regenerative
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Abstract
This utility model provides a kind of rotary regenerative air preheater high-head low discharge non-isolated on-line cleaning device, including steam heater, electric heater unit and the water tank being sequentially connected with, medicament adding device, high-pressure hydraulic pump, soot blower；Described steam heater and electric heater unit are respectively arranged in water tank.This on-line cleaning apparatus structure is simple, it is convenient to implement, little on unit operation impact, can the heat exchange element of high-efficiency washing rotary regenerative air preheater under the conditions of non-isolated online.
Description
Technical field
This utility model belongs to station boiler technical field of auxiliary equipment, is specifically related to a kind of rotary regenerative air preheater high
Pressure head low discharge non-isolated on-line cleaning device.
Background technology
Rotary regenerative air preheater (being called for short " air preheater ") is widely used in China's Large Copacity Thermal generation unit, the type
Air preheater is narrow and small due to free air space, and dust deposit easily occurs.
In recent years, along with national requirements for environmental protection improves constantly, the large-scale Thermal generation unit of active service has been basically completed SCR and has taken off
Nitre is transformed.After installing SCR denitration device additional, the NH that in denitrating system, unreacted is escaped3With the SO in flue gas3Easily reaction forms gas
State NH4HSO4, condense in air preheater heat exchange element surface deposition under given conditions and form liquid NH4HSO4.Liquid NH4HSO4Tool
There is extremely strong viscosity, easily stick fly ash granule in flue gas, cause heat exchange element superficial dust, cause air preheater to block.
After denitration transformation, air preheater blocking the most seriously jeopardizes the safe and stable operation of unit, becomes a great problem of denitration unit operation.
Air preheater once occurs the fouling of stifled ash that heat transfer effect variation will be made to cause exhaust gas temperature to raise, it addition, air preheater differential pressure increases, and leakage
Wind rate increases, and boiler efficiency reduces, and meanwhile, blower fan electric current increases, blower fan power consumption increases, and station service power consumption rate raises；When stifled ash is serious
Time, can cause unit cannot band heavy-duty service, add give, air-introduced machine the surge even generation of boiler RB accident, impact electricity
Factory's economy serious threat boiler safety stable operation.
At present, the purge mode used for air preheater heat exchange element dust stratification is traditional steam soot blowing or sonic soot blowing,
And when dust stratification contains the NH that toughness is high4HSO4Time, traditional steam soot blowing is difficult to effectively remove it.To this end, grind both at home and abroad
Study carefully mechanism and equipment manufacturer for NH4HSO4The air preheater dust stratification problem caused expands correlational study, it is proposed that utilize water under high pressure
Clean the technical scheme of air preheater.Comparing steam or sonic soot blowing, high pressure water cleaning pressure head is high, momentum is big, shear strength is high, right
Cleansing power and the effect of black dirt (the highest black dirt sticked) are good more than steam.
Air preheater high pressure water cleaning presses its cleaning way, off-line water can be divided into clean and online water cleans two kinds.
So-called off-line water cleans and parallel running air preheater isolation is carried out under blowing out or underload exactly.
Patent (application number 201420518564.X) " air preheat flusher ", it is proposed that weld one at air preheater cold terminal shell
Special for self-control flushing tool pulley is connected on slideway by the self-control slideway axially in parallel with air preheater, is pacified by high-pressure flushing gun
It is contained on special nut slider, rotarily drives nut slider by leading screw and moved radially the movement of high-pressure flushing gun,
Replace the cleaning manually completed side of isolation air preheater.This device is utilized to complete the technical side that air preheater off-line is cleaned
Although case can reduce cost of labor, improve work efficiency, can reach certain effect, but off-line clean will in blowing out or
Carry out under conditions of underload isolation air preheater.Owing to being a kind of day at present air preheater soot blowing added with out of stock device boiler
Perseverance works, and in order to reach cleaning performance, will certainly be substantially reduced the practicality to electrical network, reduce the economical operation of unit
Property, it addition, the difficulty of air preheater one side isolation at present is relatively big, guard seal is poor, and on the one hand the flue gas leaking into air preheater contains
Dust can be attached on flushing heat storage plate, and on the other hand high-temperature flue gas ratio is relatively hazardous, easily causes personal injury.
It is exactly unit not shutting down that so-called online water cleans, do not carry out the air preheater run clearly under conditions of load down
Wash.Patent (application number 201420780780.1) " boiler air preheater of on-line rinsing ", it is proposed that a kind of on-line rinsing
Boiler air preheater, can overcome off-line water and cleans necessary not shutting down, do not clean the most at any time under load down
The deficiency isolating air preheater, improves safety and the economy of flushing.But use the industry water pair that temperature is relatively low
Run air preheater to be directly carried out, in air preheater cold end heat exchange element surface enamel can be caused to produce under the effect of colding and heat succeed each other
Stress causes explosion to come off, aggravation blocking.It addition, washing time is long.
To sum up above analysis understands, though current air preheater High-pressure Water Jet Technology can solve air preheater to a certain extent
The problem of dust stratification blocking, but still have some limitations, particular problem is as follows:
(1) air preheater element service life and performing low-load running of machine set exhaust gas temperature are affected
By water under high pressure chilling, there is irregular breathing in air preheater heated element, improves sound abrasion risk, be plated in heat exchange
The internal stress that the enamel material of element surface is easily generated owing to colding and heat succeed each other causes and comes off, and shortens its service life；With cold water to sky
Pre-device carries out on-line rinsing may affect the unit underload suitability, affects flue-gas temperature, and affects primary and secondary air further
Temperature, may stop time serious to rinse work.
(2) to intractable hard scale flush efficiency is relatively low and washing time is long
In order to reduce the impact on unit exhaust gas temperature, tradition water flushing scheme is typically carried out under high-load condition, and
Washing water quantity can not be too high.Owing to ammonium hydrogen sulfate viscosity is big, denitration unit air preheater heat exchange element surface black dirt is thick and hard, needs
The longer time just can rinse out.And current domestic unit heavy-duty service time is difficult to continue longer, many units do not possess
The condition of high pressure water cleaning, therefore, the most efficient Dust scaling cleaning, becoming High-pressure Water Jet Technology needs solution
One problem.
(3) injection flow rate is uneven in air preheater radial distribution
It is placed in fan-shaped storehouse, multiple fan-shaped storehouses composition the high duty heat transfer elements into intimate that rotary regenerative air heater is thousands of
Rotor, when the rotor is turning, flue gas and air alternately pass through heat transfer element, heat transfer element absorbs heat from heat smoke, then
This portion of heat transfer element is washed away by air stream, discharges the heat of storage.When rotor rotates, each heat transfer element obtains
Identical angular velocity omega, the distance of heat transfer element distance spindle central is set to r, then linear velocity v that each heat transfer element obtains
=ω r, traditional water flushing scheme is Q at air preheater rotor radial direction spray flow0, then at radial direction unit rotor
The water yield being sprayed onto is q0=Q0/ v=Q0/ωr,Q0It is constant, it is seen that the water yield that unit rotor is sprayed onto is q with ω0With heat transfer unit
The distance of part distance spindle central is set to r and is inversely proportional to, and the injection flow rate that i.e. heat exchange element away from rotating shaft more obtains is the fewest, thus
The water jets impact power causing heat exchange element to obtain along rotor radial is different, ash disposal ability linear decrease, it is impossible to cut at whole rotor
The effective ash disposal in face.
Utility model content
Technical problem: in order to solve the defect of prior art, this utility model provides a kind of simple in construction, embodiment party
Just, little on unit operation impact, can the high-pressure water device of high-efficiency washing air preheater heat exchange element under the conditions of non-isolated online.
Technical scheme: a kind of rotary regenerative air preheater high-head low discharge that this utility model provides is non-isolated online
Clean device, including steam heater, electric heater unit and the water tank being sequentially connected with, medicament adding device, high-pressure hydraulic pump,
Soot blower；Described steam heater and electric heater unit are respectively arranged in water tank.
As improvement, described soot blower is the half telescopic soot blowing that full retractable soot blower or nozzle radially have difference to arrange
Device.
Improving as another kind, the cleansing medium of described soot blower ejection is temperature 40 DEG C～80 DEG C, pressure 25～50MPa
And add the hot water promoting the chemical reagent that heat exchange element surface black dirt comes off；The chemistry that described rush heat exchange element surface black dirt comes off
Reagent includes raising agent and organic alkali liquor.
Improving as another kind, the capacity of described water tank is 4～8h water consumptions.
This utility model additionally provides a kind of rotary regenerative air preheater, including on-line cleaning device, air preheater body, sky
Pre-device rotor and air channel, secondary air duct, a flue；Air preheater is located at by described air preheater rotor, and this is internal, described First air
Road, secondary air duct, flue are respectively arranged near this internal air preheater rotor of air preheater；Described on-line cleaning device includes that steam adds
Thermal, electric heater unit and the water tank being sequentially connected with, medicament adding device, high-pressure hydraulic pump, soot blower；Described steam heats
Device and electric heater unit are respectively arranged in water tank；Flue cold end heat exchange element bottom is located at by described soot blower, and near two
Secondary air channel, its spout is vertically upward.
This utility model additionally provides a kind of method of on-line cleaning rotary regenerative air preheater heat exchange element, uses above-mentioned
Rotary regenerative air preheater high-head low discharge non-isolated on-line cleaning device, comprises the following steps:
(1) air preheater rotor is during rotating around rotating shaft, by being arranged on the heat exchange element on air preheater rotor
Heat in flue is taken in an air channel and secondary air duct, add hot-air, complete a diabatic process；
(2) water temperature is increased to 40 DEG C～80 DEG C through steam-heating system or electric heating system in water tank by demineralized water；
Raising agent and organic alkali liquor are added in steam water tank by medicament adding device, and mix with hot water stirs；Mixed solution
Boost to 25～50MPa through high-pressure hydraulic pump, spray into on-line cleaning rotary regenerative air preheater in air preheater body by soot blower
Heat exchange element.
Beneficial effect: the rotary regenerative air preheater non-isolated on-line cleaning of high-head low discharge that this utility model provides
Apparatus structure is simple, it is convenient to implement, little on unit operation impact, can online under the conditions of non-isolated high-efficiency washing air preheater change
Thermal element.
This device is realized to air preheater rotor heat exchange by high pressure soot blower, water tank, heating system and medicament adding device
The purpose of the high-pressure water heating of raising agent and organic alkali liquor is added in element injection, can be in the effective ash disposal in whole rotor cross section, it is achieved right
Rotary regenerative air heater heat exchange element realizes efficient on-line rinsing, thus effectively solves the problem that air preheater blocks.
Specifically, this utility model, relative to prior art, has an advantage highlighted below:
(1) propose with hot water (40 DEG C～80 DEG C) replace cold water to air preheater clean, can effectively reduce air preheater portion
Part surface is because by chilling generation differential expansion, preventing from being plated in surface enamel material coming off due to thermal (temperature difference) stress, improve it
In service life, can effectively prevent unit cigarette temperature in the case of the online water of underrun rinses from reducing further, to unit operation
Adversely affect.
(2) propose cleaning interpolation raising agent and organic alkali liquor shortening washing time in water source, added with the weak base of raising agent
Property flushing liquor can with the silicate scale generation complexing on air preheater surface, reach dissolve purpose.By osmosis and swollen
Swollen effect makes that grieshoch is in-house occurs that crackle and gap come off from heat exchange original paper and rinsed out by current, can effectively wash
Intractable hard scale, shortens washing time, improves flush efficiency.
(3) proposition employing is telescopic and nozzle radially has difference to be arranged to half telescopic solution radial direction uneven the asking of flushing
Topic.Full telescopic soot blower head installs a nozzle, by calculating and setting difference radial position blowing time, it is ensured that each point soot blowing
Intensity, water consumption are identical.Half telescopic soot blowing phase, by radially arranging different spray nozzles quantity, to ensure radial direction
Unit rotor heat exchange element soot blowing intensity is identical with water consumption.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of this utility model rotary regenerative air preheater；
Fig. 2 is the top view of this utility model rotary regenerative air preheater；
Fig. 3 is the structural representation of full telescopic soot blower；
Fig. 4 is that full telescopic soot blower uses state diagram；
Fig. 5 is that nozzle radially has difference to arrange the schematic diagram of structure one of half retractable soot blower；
Fig. 6 is that nozzle radially has difference to arrange the schematic diagram of structure two of half retractable soot blower.
Detailed description of the invention
Below in conjunction with the accompanying drawings high-pressure water flushing device of the present utility model is made and further illustrating.
In this utility model, raising agent can be any loosening machine of prior art, organic alkali liquor can be appointing of prior art
Anticipate organic alkali liquor, as long as can promote that heat exchange element surface black dirt comes off can realize the purpose of this utility model.
Rotary regenerative air preheater, is shown in Fig. 1 and 2, including on-line cleaning device, air preheater body 11, air preheater rotor 12
And air channel 13, secondary air duct 14, a flue 15；Air preheater rotor 12 is fixed on air preheater body 11 by rotor bearing 16
In, air channel 13, secondary air duct 14, flue 15 are respectively arranged in air preheater body 11 near air preheater rotor 12；Online clear
Cleaning device includes steam heater 1, electric heater unit 2 and the water tank 3 being sequentially connected with, medicament adding device 4, high-pressure hydraulic pump
5, soot blower 6；Steam heater 1 and electric heater unit 2 are respectively arranged in water tank 3；Soot blower 6 is located at the cold end of flue 15 and is changed
Thermal element bottom, and near secondary air duct 14, its spout is vertically upward.
The volume of water tank 3 is according to unit design, and reservoir storage is available for 4～uses for 8 hours；The cleaning of soot blower 6 ejection is situated between
Matter is 40 DEG C～the high-pressure water heating of 80 DEG C, and water temperature is adjusted by the steam heater 1 being arranged within water tank or electric heater unit 2
Joint；In soot blower 6, heat hydraulic pressure is 25～50MPa, the high-pressure hydraulic pump 5 after being arranged on water tank, before high pressure soot blower regulate.
Medicament adding device 4 is arranged in steam water tank 3 top, and steam water tank 3 UNICOM, can be at regular time and quantity to cleansing medium
Middle interpolation promotes the chemical reagent that heat exchange element surface black dirt comes off, such as raising agent and organic alkali liquor.
Soot blower 6 is arranged in air preheater cold-end air heat exchange element and goes to the bottom of fume side from wind side, nozzle vertically to
On；Being entered flue 15 at this position air preheater rotor 12 by secondary air duct 14, the temperature of heat exchange element is minimum, with the rinse water temperature difference
Minimum, after this position sprays into water under high pressure, heat exchange element stops about 30s in fume side simultaneously, and heat exchange element surface moisture can be abundant
Evaporation.Soot blower 6 includes full retractable soot blower or half retractable soot blower.
Full retractable soot blower head installs a nozzle, adjusts the spray of the soot blowing time of staying according to going deep into rotor radial distance
Mouth set in line with the criterion that unit are washing water quantity is identical according to the linear velocity of each point in the time of staying of radially different position
Thus realize conplane heat exchange element and obtain identical soot blowing intensity and injection flow rate along rotor radial.
Half retractable soot blower uses the mode that nozzle radial arrangement is different to reach radially different position unit are and rinses
The purpose that the water yield is identical.Half telescopic structure water injector, is deep into air preheater rotor radius length, radially side when ash disposal
To arranging varying number nozzle 7, to ensure that radial direction unit rotor heat exchange element obtains identical soot blowing intensity and injection flow rate.
This high pressure water cleaning device can clean swinging air preheat under shutdown online, non-, non-isolated, normal operating condition
Device heat exchange element.
The operation principle of this rotary regenerative air preheater is as follows:
1 air preheater rotor 12 is during rotating around rotating shaft 17, by being arranged on the heat exchange on air preheater rotor 12
Heat in flue 15 is taken in an air channel 13 and secondary air duct 14 by element, adds hot-air, completes a diabatic process；
Water temperature is increased to through steam-heating system 1 or electric heating system 2 in water tank 3 by 2 from the demineralized water of power plant
40 DEG C～80 DEG C；Raising agent and organic alkali liquor are entered in water tank 3 by medicament adding device 4, and mix with hot water stirs；Mixing
After solution boost to 25～50MPa through high-pressure hydraulic pump 5, spray in air preheater body 11 on-line cleaning by soot blower 6 and turn round
Regenerative air heater heat exchange element.
Injection is illustrated as a example by three points of storehouse rotor rotary regenerative air heaters of 33-VI-1600 type that certain power plant 600MW unit is equipped with
The principle of system radially equivalent water spray and process.
This sky expection root diameter is 15m, and rotating speed is to calculate rotating speed for simplification in this example of 1.23r/min to take 1r/min, is subject to
Hot side height is 1.6m.
When soot blower 6 uses full telescopic soot blower, its structure is shown in Fig. 3 and 4, including nozzle 7, ash gun 8, drives ash gun
The sport car 9 of movement；1 nozzle 7 installed by full retractable soot blower, and nozzle 7 is arranged in the end of ash gun 8, is shaped as rectangle,
Ejection jet shape is similar to the shape of heat exchange element.
During work, nozzle 7 spout direction the most vertically upward, through high-pressure hydraulic pump 5 pressurization the hot high pressure containing additive
Water flows through ash gun 8, forms ejection through nozzle 7 with columnar jets and cleans heat exchange element, and the most telescopic soot blower 6 is from air preheater
Center or edge start moving flushing heat exchange element, adjust soot blowing time of staying nozzle radially according to going deep into rotor radial distance
The time of staying of diverse location sets in line with the criterion that unit are washing water quantity is identical according to the linear velocity of each point.
Soot blower length is not less than air preheater rotor radius, and this example spray gun length takes 8 meters, and gun head nozzle radially can cover
Lid 0.3m, gos deep into rotating shaft position 6 from spray gun and starts water spray, and the radial distance of now nozzle distance rotating shaft is designated as L=0m, this position
The spray gun time of staying is t=1min, and spray gun outwards retreats to L=0.3m, time of staying t=2min afterwards, carries out successively such as table 1 institute
Show, until spout retreats to rotor edge position 5, altogether need to stop 25 times, consume 300min altogether, within i.e. 5 hours, complete the most complete
Face soot blowing.
The full retractable soot blower stroke of table 1 and time of staying corresponding relation
| L/m | 0 | 0.3 | 0.6 | 0.9 | 1.2 | …… | 7.5 |
| t/min | 1 | 2 | 3 | 4 | 5 | …… | 25 |
When using half retractable soot blower, its structure can be the form of Fig. 5 or Fig. 6.
Half retractable soot blower of the version of Fig. 5, the sport car moved including nozzle 7, ash gun 8, drive ash gun
9；Full retractable soot blower includes the nozzle 7 of some groups of increased number, and adjacent sets nozzle 7 keeps at a certain distance away and is arranged in ash gun
On 8, being shaped as rectangle, ejection jet shape is similar to the shape of heat exchange element.During soot blowing, on soot blower 6, all nozzles 7 are pre-
First it is placed in air preheater, when soot blower 6 falls back on extreme position, soot blower 6 end distance air preheater rotating shaft about 1.5m, spray gun overall length
5m.In distance i=0.3m position, soot blower 6 end, arrange n=1 nozzle 7；In distance i=1.8m position, soot blower end,
Arrange n=2 nozzle 7；In distance i=3.3m position, soot blower end, arrange n=3 nozzle 7, the like, until i=
During 4.8m, arrange n=4 nozzle.Number n arranging nozzle and the relation arriving soot blower end distance i are as shown in the table.
During work, going deep into rotating shaft position from soot blower 6 and start water spray, now nozzle 7 is designated as apart from the radial distance of rotating shaft
L2=0m, this position soot blower 6 time of staying is t2=1min, soot blower outwards retreats to as L afterwards2=0.1m, the time of staying is
t2=2min, carries out as shown in table 3, until nozzle 7 retreats to rotor edge position, needing altogether to stop 20 times, time-consuming 84min successively
Complete once comprehensive soot blowing.
Table 2 half retractable soot blower radial position and nozzle number corresponding relation
| i/m | 0.3 | 0.8 | 1.3 | 1.8 | 2.3 | …… | 3 |
| n | 1 | 2 | 3 | 4 | 5 | …… | 7 |
Table 3 half telescoping lance stroke and time of staying corresponding relation
| L2/m | 0 | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | …… | 2 |
| t2/min | 1 | 2 | 3 | 4 | 5 | 6 | …… | 20 |
Half retractable soot blower of Fig. 6 version, the sport car 9 moved including nozzle 7, ash gun 8, drive ash gun；
Keep at a certain distance away on ash gun 8 and be provided with one group of curved pipe 10, one group of curved pipe 10 is sequentially provided with the nozzle 7 of increased number,
Being shaped as rectangle, ejection jet shape is similar to the shape of heat exchange element.
Claims (5)
1. a rotary regenerative air preheater high-head low discharge non-isolated on-line cleaning device, it is characterised in that: include steaming
Vapour heater (1), electric heater unit (2) and the water tank (3) being sequentially connected with, medicament adding device (4), high-pressure hydraulic pump (5),
Soot blower (6)；Described steam heater (1) and electric heater unit (2) are respectively arranged in water tank (3).
A kind of rotary regenerative air preheater high-head low discharge non-isolated on-line cleaning dress the most according to claim 1
Put, it is characterised in that: described soot blower (6) is the half telescopic soot blowing that full retractable soot blower or nozzle radially have difference to arrange
Device.
A kind of rotary regenerative air preheater high-head low discharge non-isolated on-line cleaning dress the most according to claim 1
Put, it is characterised in that: the cleansing medium that described soot blower (6) sprays is temperature 40 DEG C～80 DEG C, pressure 25～50MPa and interpolation
Promote the hot water of the chemical reagent that heat exchange element surface black dirt comes off；The chemical reagent bag that described rush heat exchange element surface black dirt comes off
Include raising agent and organic alkali liquor.
A kind of rotary regenerative air preheater high-head low discharge non-isolated on-line cleaning dress the most according to claim 1
Put, it is characterised in that: the capacity of described water tank (3) is 4～8h water consumptions.
5. including a rotary regenerative air preheater for on-line cleaning device described in any one of Claims 1-4, its feature exists
In: include on-line cleaning device, air preheater body (11), air preheater rotor (12) and air channel (13), a secondary air duct
(14), flue (15)；Described air preheater rotor (12) is located in air preheater body (11), described air channel (13), a secondary wind
Road (14), flue (15) are respectively arranged near air preheater body (11) interior air preheater rotor (12)；Described on-line cleaning device bag
Include steam heater (1), electric heater unit (2) and the water tank (3) being sequentially connected with, medicament adding device (4), high-pressure hydraulic pump
(5), soot blower (6)；Described steam heater (1) and electric heater unit (2) are respectively arranged in water tank (3)；Described soot blowing
Flue (15) cold end heat exchange element bottom is located at by device (6), and near secondary air duct (14), its spout is vertically upward.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620380054.XU CN205690963U (en) | 2016-04-28 | 2016-04-28 | Rotary regenerative air preheater and high-head low discharge non-isolated on-line cleaning device thereof |
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| CN201620380054.XU CN205690963U (en) | 2016-04-28 | 2016-04-28 | Rotary regenerative air preheater and high-head low discharge non-isolated on-line cleaning device thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758253A (en) * | 2016-04-28 | 2016-07-13 | 国电科学技术研究院 | High-pressure-head low-flow non-isolated online cleaning device for rotary air preheater |
| CN110186317A (en) * | 2019-05-09 | 2019-08-30 | 华电电力科学研究院有限公司 | A kind of air preheater on-line cleaning equipment and its application method |
-
2016
- 2016-04-28 CN CN201620380054.XU patent/CN205690963U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758253A (en) * | 2016-04-28 | 2016-07-13 | 国电科学技术研究院 | High-pressure-head low-flow non-isolated online cleaning device for rotary air preheater |
| CN110186317A (en) * | 2019-05-09 | 2019-08-30 | 华电电力科学研究院有限公司 | A kind of air preheater on-line cleaning equipment and its application method |
| CN110186317B (en) * | 2019-05-09 | 2024-02-09 | 华电电力科学研究院有限公司 | Online cleaning equipment for air preheater and application method of online cleaning equipment |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 210000 Qixia, Jiangsu Province, Wonderland Road, No. 10, Co-patentee after: Guodian Nanjing electric power test & Research Co., Ltd. Patentee after: National Electric Science and Technology Research Institute Co., Ltd. Address before: 210000 Qixia, Jiangsu Province, Wonderland Road, No. 10, Co-patentee before: Nanjing Power Equipment Quality & Performance Test Center Patentee before: Guodian Science and Technology Research Institute |