CN110508091A - A kind of sulfur trioxide under the high ash low-temperature flue gas environment applied to high-sulfur removes system - Google Patents
A kind of sulfur trioxide under the high ash low-temperature flue gas environment applied to high-sulfur removes system Download PDFInfo
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- CN110508091A CN110508091A CN201910919318.2A CN201910919318A CN110508091A CN 110508091 A CN110508091 A CN 110508091A CN 201910919318 A CN201910919318 A CN 201910919318A CN 110508091 A CN110508091 A CN 110508091A
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- low
- gas
- economizer
- stack
- level
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- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000003546 flue gas Substances 0.000 title claims abstract description 31
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 19
- 239000011593 sulfur Substances 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 105
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 20
- 239000012717 electrostatic precipitator Substances 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- 230000003628 erosive effect Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000003245 coal Substances 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 4
- 239000004071 soot Substances 0.000 claims description 4
- 239000002956 ash Substances 0.000 description 17
- 238000005260 corrosion Methods 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 239000005864 Sulphur Substances 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/73—After-treatment of removed components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses the sulfur trioxides under a kind of high ash low-temperature flue gas environment applied to high-sulfur to remove system, low low-level (stack-gas) economizer includes the low low-level (stack-gas) economizer of high temperature section, the low low-level (stack-gas) economizer of middle-temperature section and the low low-level (stack-gas) economizer of low-temperature zone, the low low-level (stack-gas) economizer of air preheater, high temperature section, the low low-level (stack-gas) economizer of middle-temperature section and the low low-level (stack-gas) economizer of low-temperature zone are sequentially distributed along flow of flue gas direction in back-end ductwork, the entrance of back-end ductwork is connected with the exhanst gas outlet of boiler, and the outlet of back-end ductwork is successively connected through electrostatic precipitator, air-introduced machine and desulfurizing tower with the entrance of chimney；Back-end ductwork vertical distribution, and flue gas flows from top to bottom in back-end ductwork；Erosion resistant coating is coated on the blade of air-introduced machine；Flue demister or wet scrubber are provided between desulfurizing tower and chimney, which can be realized the effluent standard of high-sulfur high ash low-temperature flue gas, and cost of investment is low, safety and high stability.
Description
Technical field
The invention belongs to generating set technical field, a kind of be related under the high ash low-temperature flue gas environment applied to high-sulfur three oxygen
Change sulphur and removes system.
Background technique
The minimum discharge technology in thermoelectricity field is widely used, and chimney breast dust concentration is not more than 10mg/m3,
NOx concentration is not more than 50mg/m3, SO2Concentration is not more than 35mg/m3, strength is contributed to win blue sky defended war, is non-electrical row
The minimum discharge transformation of industry plays example.With reference to the environmental protection standard of developed country, SO3It is an important indicator, but the country is only
SO is required in the environmental protection standard for there are a small number of areas such as Shanghai, Beijing, Hangzhou3Concentration is not higher than 5mg/m3。SO3It is to generate acid rain
Direct pollutant is the important as precursors object of haze, therefore State Ministry of Environmental Protection repeatedly holds a meeting and SO is discussed3Discharge standard and de-
Except technology.
According to the process flow of coal-burning power plant, the S in fire coal forms SO in burning2, part SO2In high temperature with O2Instead
SO should be generated3, another part SO2By the catalysis of fly ash granule, with O2Anyway SO is generated3.High-temperature flue gas after SCR denitration,
A part of SO2By the catalysis of catalyst, SO is formed3.When by air preheater and low low-level (stack-gas) economizer, most of SO3It is condensed into
H2SO4Acid mist is trapped by fly ash granule.When by deduster, by the SO of fly ash granule trapping3As flying dust is removed by deduster.
When by desulfurizing tower, part SO3It is removed.After SCR catalyst, there are about 1~2% SO2It is converted to SO3, air preheater and deduster
To SO3Removal efficiency be about 20%, efficient desulfurizing tower and demister are to SO3Removal efficiency be about 70%.Assuming that air preheater entrance
SO3Concentration is 50mg/m3, then desulfurizing tower entrance SO3Concentration is 40mg/m3, chimney entrance SO3Concentration is 12mg/m3, it is unable to satisfy
The requirement of existing standard.
Low low-level (stack-gas) economizer can greatly improve unit to SO3Removal efficiency, according to actual motion, air preheater, low temperature
Economizer and deduster are to SO3Removal efficiency can achieve 80% or more, then after installing low low-level (stack-gas) economizer additional, desulfurizing tower entrance SO3
Concentration is 10mg/m3, chimney entrance SO3Concentration is 3mg/m3, can satisfy the requirement of existing standard.
China's sulphur coal (sulfur content is higher than 3%) accounts for 8% of total resources or so, has in southwest plurality of
Sulphur coal coal unit, the universal SO in 3-6% or so, flue gas of coal-fired As-received sulphur content3Concentration is likely larger than 100mg/m3If
Install low low-level (stack-gas) economizer additional, then desulfurizing tower entrance SO3Concentration is 20mg/m3, chimney entrance SO3Concentration is 6mg/m3, it is unable to satisfy
The requirement of existing standard.And the stifled ash of sulphur coal unit and corrosion risk are very big, the low low-level (stack-gas) economizer technology of tradition can not be steady safely
Fixed operation.
Another SO3Removal efficiency technology is to install SO additional in SCR inlet flue3Removing means sprays alkaline matter in flue,
SO3Removal efficiency also can achieve 80% or more, but high investment, and need persistently to consume alkaline matter.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, provide a kind of applied to high-sulfur high ash low temperature cigarette
Sulfur trioxide under compression ring border removes system, which can be realized the effluent standard of high-sulfur high ash low-temperature flue gas, and invest at
This low, safety and high stability.
In order to achieve the above objectives, the sulfur trioxide removing of the present invention applied under high-sulfur high ash low-temperature flue gas environment
System includes low low-level (stack-gas) economizer, air preheater, back-end ductwork, electrostatic precipitator, air-introduced machine, desulfurizing tower and chimney；
Low low-level (stack-gas) economizer includes that the low low-level (stack-gas) economizer of high temperature section, the low low-level (stack-gas) economizer of middle-temperature section and low-temperature zone low temperature save
Coal device, the low low-level (stack-gas) economizer of air preheater, high temperature section, the low low-level (stack-gas) economizer of middle-temperature section and the low low-level (stack-gas) economizer of low-temperature zone are along cigarette
Flow of air direction is sequentially distributed in back-end ductwork, and the entrance of back-end ductwork is connected with the exhanst gas outlet of boiler, back-end ductwork
Outlet be successively connected through electrostatic precipitator, air-introduced machine and desulfurizing tower with the entrance of chimney；
Back-end ductwork vertical distribution, and flue gas flows from top to bottom in back-end ductwork；
Erosion resistant coating is coated on the blade of air-introduced machine；
Flue demister or wet scrubber are provided between desulfurizing tower and chimney.
It further include water inlet pipe, outlet conduit, booster pump and low-pressure heater, the entrance of water inlet pipe and booster pump and low
The water inlet of pressure heater is connected, and the water inlet of the outlet of booster pump low-level (stack-gas) economizer low with low-temperature zone is connected, low-temperature zone
The water inlet of the water outlet of low low-level (stack-gas) economizer low-level (stack-gas) economizer low with middle-temperature section is connected, and the low low-level (stack-gas) economizer of middle-temperature section goes out
The water inlet of mouth of a river low-level (stack-gas) economizer low with high temperature section is connected, the water outlet and low-pressure heater of the low low-level (stack-gas) economizer of high temperature section
Water outlet be connected with outlet conduit.
The finned tube of the low low-level (stack-gas) economizer of high temperature section, the low low-level (stack-gas) economizer of middle-temperature section and the low low-level (stack-gas) economizer of low-temperature zone is H
Finned tube, the thickness of fin is more than or equal to 2mm on finned tube, and the pipe thickness of finned tube is more than or equal to 5mm；
The heat-transfer surface of the low low-level (stack-gas) economizer of high temperature section, the low low-level (stack-gas) economizer of middle-temperature section and the low low-level (stack-gas) economizer of low-temperature zone integrates
20%, 30% and the 50% of the total heat exchange area of low low-level (stack-gas) economizer is not accounted for.
The pitch of heat exchanger tube is more than or equal to 23mm, exchanges heat in the low low-level (stack-gas) economizer of middle-temperature section in the low low-level (stack-gas) economizer of high temperature section
The pitch of pipe is more than or equal to 21mm more than or equal to the pitch of heat exchanger tube in 23mm, the low low-level (stack-gas) economizer of low-temperature zone.
It further include the supporting beam for being fixed on low low-level (stack-gas) economizer in back-end ductwork.
It further include the acoustic wave ash ejector for carrying out sonic soot blowing to low low-level (stack-gas) economizer.
The invention has the following advantages:
Sulfur trioxide removing system of the present invention applied under high-sulfur high ash low-temperature flue gas environment is in concrete operations
When, the flue gas after air preheater cools down is cooled to 100-110 DEG C through low low-level (stack-gas) economizer again, the gaseous state SO in flue gas3It is dense
Degree is reduced to 15mg/m3Left and right, remaining SO3It is transformed into H2SO4It is adsorbed, is removed when using electrostatic precipitator, separately by flying dust
Outside, flue demister or wet scrubber are provided between desulfurizing tower and chimney, to realize high-sulfur high ash low-temperature flue gas
Effluent standard.In addition, the back-end ductwork vertical distribution, and flue gas in back-end ductwork flow to direction be from top to bottom, and
It is coated with erosion resistant coating on the blade of air-introduced machine, to reduce the risk of viscous ash deposit, the safety of system and can to the greatest extent
It is higher by property, and cost of investment is lower.
Detailed description of the invention
Fig. 1 is system schematic of the invention；
Fig. 2 is the structural schematic diagram of low low-level (stack-gas) economizer in the present invention.
Wherein, 1 it is boiler, 2 be air preheater, 3 be low low-level (stack-gas) economizer, 4 be electrostatic precipitator, 5 is air-introduced machine, 6
It is chimney for desulfurizing tower, 7,8 be booster pump, 9 be low-pressure heater, 10 be the low low-level (stack-gas) economizer of high temperature section, 11 is that middle-temperature section is low
Low-level (stack-gas) economizer, 12 are the low low-level (stack-gas) economizer of low-temperature zone.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, the sulfur trioxide of the present invention applied under high-sulfur high ash low-temperature flue gas environment removes system packet
Include low low-level (stack-gas) economizer 3, air preheater 2, back-end ductwork, electrostatic precipitator 4, air-introduced machine 5, desulfurizing tower 6 and chimney 7；It is low
Warm economizer 3 includes the low low-level (stack-gas) economizer 10 of high temperature section, the low low-level (stack-gas) economizer 11 of middle-temperature section and the low low-level (stack-gas) economizer 12 of low-temperature zone,
The low low-level (stack-gas) economizer 10 of air preheater 2, high temperature section, the low low-level (stack-gas) economizer 11 of middle-temperature section and low 12 edge of low-level (stack-gas) economizer of low-temperature zone
Flow of flue gas direction is sequentially distributed in back-end ductwork, and the entrance of back-end ductwork is connected with the exhanst gas outlet of boiler 1, tail portion cigarette
The outlet in road is successively connected through electrostatic precipitator 4, air-introduced machine 5 and desulfurizing tower 6 with the entrance of chimney 7；Back-end ductwork vertically divides
Cloth, and flue gas flows from top to bottom in back-end ductwork；Erosion resistant coating is coated on the blade of air-introduced machine 5；Desulfurizing tower 6 and chimney 7
Between be provided with flue demister or wet scrubber.
The invention also includes water inlet pipe, outlet conduit, booster pump 8 and low-pressure heater 9, water inlet pipe and booster pump 8
Entrance and the water inlet of low-pressure heater 9 be connected, the water inlet of the outlet of booster pump 8 low-level (stack-gas) economizer 12 low with low-temperature zone
It is connected, the water inlet of the water outlet low-level (stack-gas) economizer 11 low with middle-temperature section of the low low-level (stack-gas) economizer 12 of low-temperature zone is connected, medium temperature
The water inlet of the water outlet low-level (stack-gas) economizer 10 low with high temperature section of the low low-level (stack-gas) economizer 11 of section is connected, and high temperature section low temperature saves coal
The water outlet of device 10 and the water outlet of low-pressure heater 9 are connected with outlet conduit.
The fin of the low low-level (stack-gas) economizer 10 of high temperature section, the low low-level (stack-gas) economizer 11 of middle-temperature section and the low low-level (stack-gas) economizer 12 of low-temperature zone
Pipe is H finned tube, and the thickness of fin is more than or equal to 2mm on finned tube, and the pipe thickness of finned tube is more than or equal to 5mm；High temperature
The heat exchange area of the low low-level (stack-gas) economizer 10 of section, the low low-level (stack-gas) economizer 11 of middle-temperature section and the low low-level (stack-gas) economizer 12 of low-temperature zone accounts for low respectively
20%, 30% and the 50% of the total heat exchange area of low-level (stack-gas) economizer 3；The pitch of heat exchanger tube is big in the low low-level (stack-gas) economizer 10 of high temperature section
The pitch of heat exchanger tube is more than or equal to 23mm, the low low-level (stack-gas) economizer of low-temperature zone in equal to 23mm, the low low-level (stack-gas) economizer 11 of middle-temperature section
The pitch of heat exchanger tube is more than or equal to 21mm in 12.
The invention also includes for carrying out the acoustic wave ash ejector of sonic soot blowing to low low-level (stack-gas) economizer 3 and for will be low
Warm economizer 3 is fixed on the supporting beam in back-end ductwork.
The heat exchanger tube material of the low low-level (stack-gas) economizer 10 of the high temperature section is 20G, the heat exchange of the low low-level (stack-gas) economizer 11 of middle-temperature section
Tubing matter is ND steel, and the heat exchanger tube material of the low low-level (stack-gas) economizer 12 of low-temperature zone is 316L；The support deck-molding of low low-level (stack-gas) economizer 3 is wide
Than being greater than 5；Low low-level (stack-gas) economizer 3 uses acoustic wave ash ejector, and soot blowing radius is by 1 meter of arrangement；4 one electric field pole plate electrode of electrostatic precipitator
Line all uses carbon steel to make, and the later polar curve of two electric fields is made of 316L, and pole plate is made of carbon steel；Electrostatic precipitator 4
Ash bucket material selection 316L, and ash bucket is heated by steam pipe coil, temperature is controlled at 80 DEG C or more；Air-introduced machine 5
Blade uses thermal spraying anti-corrosion, and wheel hub and shell use ND steel stickers lining anti-corrosion；Desulfurizing tower 6 is configured with one layer of pallet.
Specific work process of the invention are as follows:
Flue gas after the cooling of air preheater 2 carries out being cooled to acid dew point hereinafter, temperature arrives through low low-level (stack-gas) economizer 3 again
Gaseous state SO at 100-110 DEG C or so, in flue gas3Concentration is reduced to 15mg/m3Left and right, remaining SO3It is transformed into H2SO4It is inhaled by flying dust
It is attached, it is removed using when electrostatic precipitator 4, since there are serious stifled for low low-level (stack-gas) economizer 3 in high-sulfur high ash flue gas environment
Ash and corrosion risk, it is therefore desirable to carrying out series of optimum to the structure of low low-level (stack-gas) economizer 3 just can ensure that safe and stable operation,
The blade of the pole plate polar filament of electrostatic precipitator 4 and air-introduced machine 5, wheel hub, shell need to carry out at anti-corrosion there is also corrosion risk
It manages, one layer of pallet and flue demister or wet scrubber is configured in efficient desulfurizing tower 6, to ensure remaining gaseous state SO3It is de-
Except to 5mg/m3Hereinafter, meeting following standard requirements, safe and stable, the long-term operation of whole process equipment are realized, to mention
The safe and stable and economy of high entire unit.
In addition, the low low-level (stack-gas) economizer 10 of high temperature section, the low low-level (stack-gas) economizer 11 of middle-temperature section and the low low-level (stack-gas) economizer 12 of low-temperature zone
Material it is different, under the premise of ensuring that heat exchanger low-temperature corrosion is controllable, reduce the cost of equipment to the greatest extent.
Claims (6)
1. the sulfur trioxide under a kind of high ash low-temperature flue gas environment applied to high-sulfur removes system, which is characterized in that including low
Warm economizer (3), air preheater (2), back-end ductwork, electrostatic precipitator (4), air-introduced machine (5), desulfurizing tower (6) and chimney
(7)；
Low low-level (stack-gas) economizer (3) includes the low low-level (stack-gas) economizer of high temperature section (10), the low low-level (stack-gas) economizer of middle-temperature section (11) and low-temperature zone
Low low-level (stack-gas) economizer (12), air preheater (2), the low low-level (stack-gas) economizer of high temperature section (10), the low low-level (stack-gas) economizer of middle-temperature section (11)
And low-temperature zone low temperature saves coal (12) and is sequentially distributed along flow of flue gas direction in back-end ductwork, the entrance and boiler of back-end ductwork
(1) exhanst gas outlet is connected, the outlet of back-end ductwork successively through electrostatic precipitator (4), air-introduced machine (5) and desulfurizing tower (6) with
The entrance of chimney (7) is connected；
Back-end ductwork vertical distribution, and flue gas flows from top to bottom in back-end ductwork；
Erosion resistant coating is coated on the blade of air-introduced machine (5)；
Flue demister or wet scrubber are provided between desulfurizing tower (6) and chimney (7).
2. the sulfur trioxide according to claim 1 applied under high-sulfur high ash low-temperature flue gas environment removes system, special
Sign is, further includes water inlet pipe, outlet conduit, booster pump (8) and low-pressure heater (9), water inlet pipe and booster pump (8)
The water inlet of entrance and low-pressure heater (9) is connected, and outlet low-level (stack-gas) economizer (12) low with low-temperature zone of booster pump (8) enter
The mouth of a river is connected, and the water inlet of the water outlet of the low low-level (stack-gas) economizer of low-temperature zone (12) low-level (stack-gas) economizer (11) low with middle-temperature section is connected
Logical, the water inlet of the water outlet of the low low-level (stack-gas) economizer of middle-temperature section (11) low-level (stack-gas) economizer (10) low with high temperature section is connected, high temperature
The water outlet of the low low-level (stack-gas) economizer (10) of section and the water outlet of low-pressure heater (9) are connected with outlet conduit.
3. the sulfur trioxide according to claim 1 applied under high-sulfur high ash low-temperature flue gas environment removes system, special
Sign is, the low low-level (stack-gas) economizer of high temperature section (10), the low low-level (stack-gas) economizer of middle-temperature section (11) and the low low-level (stack-gas) economizer of low-temperature zone (12)
Finned tube be H finned tube, the thickness of fin is more than or equal to 2mm on finned tube, and the pipe thickness of finned tube is more than or equal to
5mm；
The low low-level (stack-gas) economizer of high temperature section (10), the low low-level (stack-gas) economizer of middle-temperature section (11) and low-temperature zone low low-level (stack-gas) economizer (12) are changed
Heat area accounts for 20%, 30% and the 50% of the total heat exchange area of low low-level (stack-gas) economizer (3) respectively.
4. the sulfur trioxide according to claim 1 applied under high-sulfur high ash low-temperature flue gas environment removes system, special
Sign is that the pitch of heat exchanger tube is more than or equal to 23mm, the low low-level (stack-gas) economizer of middle-temperature section in the low low-level (stack-gas) economizer of high temperature section (10)
(11) pitch of heat exchanger tube is more than or equal to more than or equal to the pitch of heat exchanger tube in 23mm, the low low-level (stack-gas) economizer of low-temperature zone (12) in
21mm。
5. the sulfur trioxide according to claim 1 applied under high-sulfur high ash low-temperature flue gas environment removes system, special
Sign is, further includes the supporting beam for being fixed on low low-level (stack-gas) economizer (3) in back-end ductwork.
6. the sulfur trioxide according to claim 1 applied under high-sulfur high ash low-temperature flue gas environment removes system, special
Sign is, further includes the acoustic wave ash ejector for low low-level (stack-gas) economizer (3) to be carried out with sonic soot blowing.
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| CN201910919318.2A CN110508091A (en) | 2019-09-26 | 2019-09-26 | A kind of sulfur trioxide under the high ash low-temperature flue gas environment applied to high-sulfur removes system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100994A (en) * | 2014-07-04 | 2014-10-15 | 西安西热锅炉环保工程有限公司 | Boiler energy saving and emission reduction system based on flue gas waste heat recovery and reheating technology |
| CN104864383A (en) * | 2015-06-02 | 2015-08-26 | 章礼道 | Ultra-low temperature coal economizer for secondary reheat unit |
| CN104990059A (en) * | 2015-06-02 | 2015-10-21 | 章礼道 | Ultralow-temperature coal economizer for single-reheat unit |
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| CN210699404U (en) * | 2019-09-26 | 2020-06-09 | 西安西热锅炉环保工程有限公司 | Sulfur trioxide removal system applied to high-sulfur high-ash low-temperature flue gas environment |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100994A (en) * | 2014-07-04 | 2014-10-15 | 西安西热锅炉环保工程有限公司 | Boiler energy saving and emission reduction system based on flue gas waste heat recovery and reheating technology |
| CN104864383A (en) * | 2015-06-02 | 2015-08-26 | 章礼道 | Ultra-low temperature coal economizer for secondary reheat unit |
| CN104990059A (en) * | 2015-06-02 | 2015-10-21 | 章礼道 | Ultralow-temperature coal economizer for single-reheat unit |
| CN106678771A (en) * | 2016-08-05 | 2017-05-17 | 杭州华电能源工程有限公司 | Air heater and low-low temperature economizer coupled energy-saving and environmental-friendly integrated system and method based on fluoroplastic heat exchanger |
| CN207006217U (en) * | 2017-06-27 | 2018-02-13 | 华能山东发电有限公司 | A kind of water-borne formula extension air preheater system |
| CN210699404U (en) * | 2019-09-26 | 2020-06-09 | 西安西热锅炉环保工程有限公司 | Sulfur trioxide removal system applied to high-sulfur high-ash low-temperature flue gas environment |
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