CN208750754U - For preventing and treating the system that deposit blocks in rotary regenerative air preheater - Google Patents
For preventing and treating the system that deposit blocks in rotary regenerative air preheater Download PDFInfo
- Publication number
- CN208750754U CN208750754U CN201820691939.0U CN201820691939U CN208750754U CN 208750754 U CN208750754 U CN 208750754U CN 201820691939 U CN201820691939 U CN 201820691939U CN 208750754 U CN208750754 U CN 208750754U
- Authority
- CN
- China
- Prior art keywords
- air
- secondary air
- rotary regenerative
- fanning strip
- air preheater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Air Supply (AREA)
Abstract
The utility model discloses a kind of for preventing and treating the system that deposit blocks in rotary regenerative air preheater, it is characterized in that adding atomizing lance on rotary regenerative air preheater, Secondary Air circulation air path, high-temperature blower, fan nozzle, the atomizing lance is arranged close to cold end First air/Secondary Air fanning strip First air side, it is connected with NaOH solution storage tank, the Secondary Air circulation air path entrance is located at hot end Secondary Air exit, outlet is located at thermal wind sensor area, it is connected with fan nozzle, high-temperature blower is provided on air duct.The utility model is by chemically reacting the method eliminated and combined with high-temperature gasification, other than it can thoroughly solve the blocking of ammonium hydrogen sulfate deposit online, moreover it is possible to the effectively low-temperature corrosion of prevention air preheater cold end.
Description
Technical field
The utility model belongs to air preheater accumulatingdust technical field, and in particular to one kind is for preventing and treating rotary air
The system that ammonium hydrogen sulfate deposit blocks in preheater.
Background technique
Currently, the coal-burning power plant of thumping majority has been made denitration transformation.Due to selective-catalytic-reduction denitrified method
(SCR) technology maturation, denitration efficiency are high, stable and be widely used.As SCR reactor runing time increases
And ammonia spraying amount increases when ultra-clean discharge, there is different degrees of dust stratification, burn into blockage problem in air preheater.Make to blow
Machine and air-introduced machine resistance increase, and coal-grinding fan delivery is inadequate, and exhaust gas temperature increases.The blocking of some power plant's air preheaters is serious, draws
Fan stall chaser causes unit to face and stops, and has seriously affected unit performance driving economy and safety.
In SCR operation, ammonium hydrogen sulfate is inevitably generated.The fusing point of ammonium hydrogen sulfate is 147 DEG C, and boiling point is 350 DEG C,
It can be reacted with aqueous slkali and generate ammonia.When ammonium hydrogen sulfate generates in flue gas, generally gaseous state, concentration is not high in flue gas.
As flue-gas temperature constantly reduces, gaseous sulfuric acid hydrogen ammonium will be condensed into liquid (below dew-point temperature), dew-point temperature and hydrogen sulfate
Ammonium concentration is related.A large amount of experimental study shows that when boiler smoke temperature is down to 220-230 DEG C, gaseous sulfuric acid hydrogen ammonium will change
For liquid, condense on heating surface.Substantially 120~230 DEG C of low-temperature zone temperature in rotary regenerative air preheater.In this temperature
In range, there is very strongly adherent liquid sulfuric acid hydrogen ammonium, heat exchange element surface can be attached to rapidly, and largely adsorbs in flue gas
Flying dust causes the blocking of air preheater.
For the ammonium hydrogen sulfate blockage problem of air preheater, there is presently no effective solution schemes, can alleviate the problem
Measure mainly has online steam blowing, high pressure water to rinse, using enamel heat exchange element, optimization SCR device operation, reduces ammonia and lets out
Leakage.But operative practice shows that above method is unable to reach ideal effect.Unit serious for Partial Blocking, some electricity
Factory uses unconventional processing method: in boiler at low load, shutting down a secondary air system of side air preheater, utilizes flue gas
Temperature eliminate deposit, and achieve all well and good effect.But this operation may cause air preheater low-temperature zone heated
Face deformation, enamel are impaired, and swell increment is big etc., belong to non routine operation, can only use in last resort.
Utility model content
In view of the deficiencies of the prior art, the utility model is intended to provide hydrogen sulfate in a kind of prevention and treatment rotary regenerative air preheater
The system of ammonium deposit blocking, structure is simple, and improvement cost is smaller, short construction period, and former sky is had substantially no effect on after the completion of transformation
The design parameter of pre- device, efficiently and more stability and safety
The utility model is achieved through the following technical solutions above-mentioned purpose:
For preventing and treating the system that deposit blocks in rotary regenerative air preheater, rotary regenerative air preheater includes First air
Point storehouse, secondary air separating storehouse, flue gas divide storehouse, rotor, hot end First air/fume side fanning strip, hot end First air/Secondary Air side fan-shaped
Plate, hot end Secondary Air/fume side fanning strip, cold end First air/fume side fanning strip, cold end First air/Secondary Air side fanning strip,
Cold end Secondary Air/fume side fanning strip, apex seal, it is characterised in that atomization spray is added on rotary regenerative air preheater
Rifle, Secondary Air circulation air path, high-temperature blower, fan nozzle, the atomizing lance is close to cold end First air/Secondary Air fanning strip
First air side setting, be connected with NaOH solution storage tank, the Secondary Air circulation air path entrance is located at hot end Secondary Air and goes out
At mouthful, outlet is located at thermal wind sensor area, is connected with fan nozzle, high-temperature blower is provided on air duct.To guarantee sealing effect,
Fanning strip sealing together is installed additional in the fan nozzle other side, sealing sector plate width is related with air preheater apex seal quantity,
It should ensure that at least one piece of apex seal is always positioned on fanning strip in air preheater operation.
Steam sootblower is arranged inside the fan nozzle, there is the slideway radially arranged in the bottom of steam sootblower, blows
Grey device can move back and forth according to pre-set programs along slideway.Soot blower can move back and forth along slideway, primary every soot blowing for 24 hours.
The thermal wind sensor area is located close to cold end Secondary Air/flue gas fanning strip Secondary Air side.Two drawn
Secondary air temperature is 330 DEG C.
The spray gun tail portion is disposed with flow controller, can be according to the pressure condition adjust automatically NaOH solution of air preheater
The amount of injection.
Compared with prior art, the utility model has the following beneficial effects:
Using the deposit of the heat air preheater cold end of hot Secondary Air, in addition to ammonium hydrogen sulfate deposit can be effectively prevented
Blocking, reduce outside blower power consumption and exhaust gas temperature, moreover it is possible to prevent gaseous state H to a certain extent2SO4Liquefaction.The NaOH of penetrating
Solution can not only be with NH4HSO4Reaction can also neutralize cold end liquefied H on a small quantity2SO4, can effectively prevent air preheater cold end
Low-temperature corrosion promotes the service life of heat exchange element.
The method combined with hot wind gasification is eliminated using chemical reaction, under double action, prevents and treats hydrogen sulfate ammonia-sinking
The effect of product object blocking is more preferable.
Its essence of the utility model is to be reacted using NaOH solution and the ammonium hydrogen sulfate in deposit, and combine high temperature
The remaining ammonium hydrogen sulfate of Secondary Air gasification of high speed thoroughly removes deposition using steam sootblower after deposit becomes loose
Object.After the completion of transformation can continuous on-line operation, and since the generation of ammonium hydrogen sulfate deposit is continuous.Therefore this is practical new
Type rinses compared with the intermittent method such as light water flushing with online steam soot blowing, online high pressure water, highly efficient and more steady
Qualitative and safety.
Detailed description of the invention
Fig. 1 is to reequip the system schematic after preceding rotary regenerative air preheater is circumferentially unfolded.
Fig. 2 be repacking after rotary regenerative air preheater be circumferentially unfolded after system schematic.
Fig. 3 is the structural schematic diagram at fan nozzle.
In figure, 1 is a wind separating bin, and 2 be secondary air separating storehouse, and 3 divide storehouse for flue gas, and 4 be rotor, and 5 be hot end First air/cigarette
Gas side fanning strip, 6 be hot end First air/Secondary Air side fanning strip, and 7 be hot end Secondary Air/fume side fanning strip, and 8 be cold end one
Secondary wind/fume side fanning strip, 9 be cold end First air/Secondary Air side fanning strip, 10 be cold end Secondary Air/fume side fanning strip, 11
For air preheater cold end, 12 be apex seal, and 13 be air preheater hot end, and 14 be high-temperature blower, and 15 be Secondary Air circulation air path, 16
It is sealing sector plate for fan nozzle, 17,18 be slideway, and 19 be steam sootblower, and 20 be atomizing lance, and 21 store up for NaOH solution
Batch can, 22 be flow controller.
Specific embodiment
The utility model is described in further detail below with reference to example, the utility model is not limited by following embodiment
System.
Embodiment 1:
Rotary regenerative air preheater is a kind of equipment that large-sized station boiler heats air using the waste heat of back-end ductwork.
Typical rotary regenerative air preheater is as shown in Figure 1, main component includes: a wind separating bin 1, secondary air separating storehouse 2, flue gas point storehouse
3, rotor 4, hot end First air/fume side fanning strip 5, hot end First air/Secondary Air side fanning strip 6, hot end Secondary Air/fume side
Fanning strip 7, cold end First air/fume side fanning strip 8, cold end First air/Secondary Air side fanning strip 9, cold end Secondary Air/fume side
Fanning strip 10, apex seal 12.
Atomizing lance 20, Secondary Air circulation air path 15, high-temperature blower 14, sector spray are added on rotary regenerative air preheater
Mouth 16,
The atomizing lance is arranged close to cold end First air/Secondary Air fanning strip First air side, stores up with NaOH solution
Batch can 21 is connected, and the Secondary Air circulation air path entrance is located at hot end Secondary Air exit, and outlet is located at thermal wind sensor area,
It is connected with fan nozzle, high-temperature blower is provided on air duct.Spray gun tail portion is disposed with flow controller 22, can be according to air preheater
The amount of injection of pressure condition adjust automatically NaOH solution.
Flue gas and air are reverse flow, and flue gas flows through air preheater from top to bottom, and air flows through air preheater from bottom to top, because
This exhanst gas outlet and air intake are air preheater cold end 11, are air preheater hot end 13 at smoke inlet and air outlet slit.In rotor
There are a large amount of corrugated heat storage plates.The rotation direction of rotor is generally fume side -- Secondary Air side -- First air side, when rotor rotates
When, heat storage plate transfers heat to air when passing through air side by absorbing and storing heat when fume side, constantly with this
Cold air is heated on ground.
After improved air preheater system is as shown in Fig. 2, NaOH solution is atomized by the atomizing lance 20 in a wind separating bin
Spray to cold end ammonium hydrogen sulfate deposit.High-temperature blower draws the hot Secondary Air in part, and sector is entered behind circulation secondary air duct
Nozzle.Structure at fan nozzle is shown in that Fig. 3, nozzle install additional sealing together close to cold end Secondary Air/fume side fanning strip, the other side
Fanning strip contacts for reducing hot wind with the direct of cold Secondary Air, since there are pressure difference, the heat of purging between cold and hot Secondary Air
Secondary Air still can be to leakage at cold Secondary Air, therefore 17 width of fanning strip installed additional should ensure that air preheater has one always in operation
Piece apex seal is located on fanning strip.
The slideway radially arranged is arranged at fan nozzle bottom, and steam sootblower 19 can move back and forth along slideway 18.When rotor turns
When dynamic, NaOH solution after being sprayed in atomizing lance with the NH in deposit4HSO4It reacts, hot wind continuously purges air preheater
Cold end, the ammonium hydrogen sulfate in vapor deposition object, makes the deposit for being deposited on air preheater cold end surface become loose.For a period of time
Afterwards, steam sootblower brings into operation, and thoroughly removes the dust stratification on heat exchange element surface.
The above is only the preferred embodiment of the utility model, it should be noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these change
It also should be regarded as the protection scope of the utility model into modification.
Claims (4)
1. for preventing and treating the system that deposit blocks in rotary regenerative air preheater, rotary regenerative air preheater includes First air point
Storehouse, secondary air separating storehouse, flue gas divide storehouse, rotor, hot end First air or fume side fanning strip, hot end First air or Secondary Air side fan-shaped
Plate, hot end Secondary Air or fume side fanning strip, cold end First air or fume side fanning strip, cold end First air or Secondary Air side are fan-shaped
Plate, cold end Secondary Air or fume side fanning strip, apex seal, it is characterised in that mist is added on rotary regenerative air preheater
Change spray gun, Secondary Air circulation air path, high-temperature blower, fan nozzle,
The atomizing lance is arranged close to the First air side of cold end First air or Secondary Air fanning strip, with NaOH solution storage tank
It is connected, the Secondary Air circulation air path entrance is located at hot end Secondary Air exit, and outlet is located at thermal wind sensor area, with sector
Nozzle is connected, and high-temperature blower is provided on air duct.
2. according to claim 1 for preventing and treating the system that deposit blocks in rotary regenerative air preheater, feature exists
Steam sootblower is arranged inside the fan nozzle, the slideway radially arranged, soot blower energy are arranged at the bottom of steam sootblower
Moved back and forth according to pre-set programs along slideway.
3. according to claim 1 for preventing and treating the system that deposit blocks in rotary regenerative air preheater, feature exists
The Secondary Air side of cold end Secondary Air or flue gas fanning strip is located close in the thermal wind sensor area.
4. according to claim 1 for preventing and treating the system that deposit blocks in rotary regenerative air preheater, feature exists
It is disposed with flow controller in the spray gun tail portion, it can be according to the injection of the pressure condition adjust automatically NaOH solution of air preheater
Amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820691939.0U CN208750754U (en) | 2018-05-10 | 2018-05-10 | For preventing and treating the system that deposit blocks in rotary regenerative air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820691939.0U CN208750754U (en) | 2018-05-10 | 2018-05-10 | For preventing and treating the system that deposit blocks in rotary regenerative air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208750754U true CN208750754U (en) | 2019-04-16 |
Family
ID=66053259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820691939.0U Expired - Fee Related CN208750754U (en) | 2018-05-10 | 2018-05-10 | For preventing and treating the system that deposit blocks in rotary regenerative air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208750754U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534172A (en) * | 2018-05-10 | 2018-09-14 | 中国计量大学 | For preventing the system that deposit blocks in rotary regenerative air preheater |
| CN110118362A (en) * | 2019-06-10 | 2019-08-13 | 西安热工研究院有限公司 | A kind of tube-type air preheater for preventing hydrogen sulfate ammonia from blocking |
-
2018
- 2018-05-10 CN CN201820691939.0U patent/CN208750754U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534172A (en) * | 2018-05-10 | 2018-09-14 | 中国计量大学 | For preventing the system that deposit blocks in rotary regenerative air preheater |
| CN110118362A (en) * | 2019-06-10 | 2019-08-13 | 西安热工研究院有限公司 | A kind of tube-type air preheater for preventing hydrogen sulfate ammonia from blocking |
| CN110118362B (en) * | 2019-06-10 | 2024-02-23 | 西安热工研究院有限公司 | Tubular air preheater capable of preventing ammonium bisulfate from being blocked |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103721538A (en) | Integrated treatment and utilizing device for recovering and denitrating smoke waste heat and condensate water of natural gas | |
| CN104949149A (en) | Rotary air preheater dust-blocking-prevention synergy sealing method and system | |
| CN107191963A (en) | A kind of method that rotary regenerative air preheater and the anti-ammonium hydrogen sulfate of the rotary regenerative air preheater are blocked | |
| CN105972632A (en) | System and process for protecting air preheater of coal-fired power plant from blockage and corrosion through hot-air counterflow | |
| CN205235766U (en) | Automatic control SCR flue gas denitration urea pyrolysis system | |
| CN104180378A (en) | Method for online elimination of ammonium bisulfate clogging of air pre-heaters of coal-fired boiler of thermal power plant | |
| CN108469036B (en) | Anti-corrosion anti-blocking self-cleaning vertical pipe type air preheater | |
| CN108534172A (en) | For preventing the system that deposit blocks in rotary regenerative air preheater | |
| CN204943550U (en) | A kind of coal-burning power plant's rotary regenerative air heater of improvement | |
| CN208750754U (en) | For preventing and treating the system that deposit blocks in rotary regenerative air preheater | |
| CN105521706A (en) | SCR (selective catalytic reduction) denitration device for low-dust flue gas in thermal power plant and denitration method | |
| CN106731573A (en) | Heat accumulating type natural gas boiler energy-saving denitration integral system | |
| CN211345388U (en) | Device for cleaning ammonium bisulfate condensed in rotary air preheater | |
| CN206771420U (en) | A kind of block-resistant type air preheater step-by-step arrangement system | |
| CN205746958U (en) | Air preheater hot blast adverse current in coal-burning power plant is the most anti-blocking and the system of corrosion | |
| CN108190986A (en) | A kind of flue is classified pre- thermal evaporation desulfurization wastewater Zero discharging system and its method of work | |
| CN109404958B (en) | Energy-saving synergistic anti-blocking method and system based on bypass flue of air preheater | |
| CN207025089U (en) | A kind of ammonia system processed that urea pyrolysis is directly realized using high temperature flue-gas from boiler | |
| CN106996577A (en) | A kind of block-resistant type air preheater step-by-step arrangement system | |
| CN204739615U (en) | Regenerative air preheater prevents stifled ash sealing system in coordination | |
| CN211098341U (en) | SCR flue gas denitration device of garbage incinerator | |
| CN210568552U (en) | Boiler energy-saving and flue gas whitening system | |
| CN205517257U (en) | Ash -laden gas SCR denitrification facility hangs down in thermal power plant | |
| CN104841256A (en) | Zero discharge system for treating flue gas of boiler and method | |
| CN205084619U (en) | System for sulfur trioxide in coal -fired flue gas of desorption power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190416 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |