CN108499326A - A kind of flue gas recovery device and recovery method based on silicon carbide film - Google Patents
A kind of flue gas recovery device and recovery method based on silicon carbide film Download PDFInfo
- Publication number
- CN108499326A CN108499326A CN201810608512.4A CN201810608512A CN108499326A CN 108499326 A CN108499326 A CN 108499326A CN 201810608512 A CN201810608512 A CN 201810608512A CN 108499326 A CN108499326 A CN 108499326A
- Authority
- CN
- China
- Prior art keywords
- silicon carbide
- carbide film
- flue gas
- cooling water
- waste heat
- 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.)
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Links
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 66
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 64
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000003546 flue gas Substances 0.000 title claims abstract description 41
- 238000011084 recovery Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000498 cooling water Substances 0.000 claims abstract description 28
- 239000012528 membrane Substances 0.000 claims abstract description 20
- 239000002918 waste heat Substances 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 10
- 239000000779 smoke Substances 0.000 claims abstract description 8
- 239000003517 fume Substances 0.000 claims abstract description 5
- 230000002411 adverse Effects 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 235000019504 cigarettes Nutrition 0.000 abstract description 5
- 230000008859 change Effects 0.000 description 6
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910003978 SiClx Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 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
- B01D53/22—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 diffusion
- B01D53/228—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 diffusion characterised by specific membranes
-
- 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
- B01D53/22—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 diffusion
- B01D2053/221—Devices
Abstract
A kind of flue gas recovery device and recovery method based on silicon carbide film, are related to the technical field of ash-laden gas moisture waste-heat recovery device.Every grade of silicon carbide film component of the present invention includes several silicon carbide membrane tubes being arranged in shell, and cooling water outlet, cooling water inlet is respectively set in the both ends in silicon carbide film length of tube direction；The periphery setting flue gas cross-flow channel in silicon carbide film length of tube direction, smoke inlet, exhanst gas outlet is respectively set in the both ends in flue gas cross-flow channel；The cooling water outlet is connected to heat exchanger through negative pressure pump, and the cold water tank connects the cooling water inlet of silicon carbide film component through cooling water pump, and heat exchanger is connect with cold water tank.The present invention recycle vapor in firepower electrical plant smoke evacuation and its and fume afterheat, reduce thermal power plant water resources consumption, it is energy saving, and fundamentally solve chimney corrosion and " white cigarette " phenomenon.
Description
Technical field
The present invention relates to the technical fields of ash-laden gas moisture waste-heat recovery device.
Background technology
Coal fired power generation is the main forms of electricity generation in China.Currently, most coal-burning power plants use wet desulfurizing process, take off
Tail flue gas water content is up to 12% or more after sulphur, easily causes chimney corrosion and " white cigarette " problem.Due to moisture in flue gas and dive
The coupling effect of heat, effective flue gas dehumidifying technology can recycle the vapor and waste heat in discharge flue gas simultaneously, not only can be real
The water supply of existing thermal power plant is self-sustaining, and depth energy saving can also effectively solve the problems, such as dew point corrosion and " white cigarette ".
The technique for being presently used for firepower electrical plant flue gas moisture and waste heat recovery mainly has condensation method and membrane separation process.Condensation
Fado is using septate heat transfer or spray form, and design is simple, technology maturation.But because it mostly runs under dew point, easy cold analysis is acid
Substance, tubing need corrosion-resistant and condensed water to be unable to direct reuse；Acid, salt, dust etc. need periodically to remove at separating/enriching in flue gas
Ash；It is big to handle heat exchange area needed for low-temperature flue gas.
Moisture and heat can be recycled simultaneously using silicon carbide film, obtain high-quality condensed water.Silicon carbide film has
The advantages that high temperature resistant, corrosion-resistant, anti-incrustation, make it that there is stronger applicability in power-plant flue gas environment.
Invention content
The present invention provides a kind of flue gas recovery device and recovery method based on silicon carbide film, in recycling firepower electrical plant smoke evacuation
Vapor and its and fume afterheat, reduce thermal power plant water resources consumption, it is energy saving, and fundamentally solve chimney corrosion and
" white cigarette " phenomenon.
The purpose of the present invention can reach by using following technical solution：
A kind of flue gas waste heat recovery apparatus based on silicon carbide film, including several grades of silicon carbide film components, cold water tank, heat exchange
Device, cooling water pump, negative pressure pump, every grade of silicon carbide film component include several silicon carbide membrane tubes being arranged in shell, institute
Cooling water outlet, cooling water inlet is respectively set in the both ends for stating silicon carbide film length of tube direction；The silicon carbide film length of tube side
To periphery setting flue gas cross-flow channel, smoke inlet, exhanst gas outlet is respectively set in the both ends in flue gas cross-flow channel；It is described
Cooling water outlet is connected to heat exchanger through negative pressure pump, and the cooling water that the cold water tank connects silicon carbide film component through cooling water pump enters
Mouthful, heat exchanger is connect with cold water tank.
Preferably, silicon carbide membrane tube of the invention be port number 1-7 tubular type silicon carbide film, aperture 20-500nm,
Pipe range is 0.5-2.0m.
Preferably, serial or parallel connection composite structure is used between several grades of silicon carbide film components of the invention.
Preferably, it is staggered in arrangement between silicon carbide membrane tube of the invention.
Saturated flue gas adverse current is passed through carbon by the recovery method of the flue gas waste heat recovery apparatus of the silicon carbide film based on the present invention
SiClx membrane module is controlled crossflow velocity, the transmembrane pressure of silicon carbide membrane tube by negative pressure pump, passes through cooling water pump control loop water
Side water flow velocity absorbs fume afterheat using flow.
The advantageous effects of the present invention：Ash-laden gas moisture waste heat recovery dress according to the invention based on silicon carbide film
Set, 45% or more moisture in firepower electrical plant discharge flue gas, while recovery section waste heat can be recycled, and do not occur dew point corrosion and
" white cigarette " phenomenon.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is the structural schematic diagram of silicon carbide film component.
In figure：1- silicon carbide film components, 2- cold water tanks, 3- heat exchangers, 4- cooling water pumps, 5- negative pressure pumps, 6- smoke inlets,
7- exhanst gas outlets, 8- cooling water outlets, the cooling water inlets 9-, 10- silicon carbide membrane tubes, 11- shells.
Specific implementation mode
Example given below is not the limitation constituted to scope of the invention as claimed, but is carried out to the present invention further
Description.
A kind of flue gas waste heat recovery apparatus based on silicon carbide film, including several grades of silicon carbide film components 1, cold water tank 2, change
Hot device 3, cooling water pump 4, negative pressure pump 5, every grade of silicon carbide film component 1 include several silicon carbide being arranged in shell 11
Cooling water outlet 8, cooling water inlet 9 is respectively set in the both ends of membrane tube 10,10 length direction of silicon carbide membrane tube；The carbonization
The periphery setting flue gas cross-flow channel of 10 length direction of silicon fiml pipe, smoke inlet is respectively set in the both ends in flue gas cross-flow channel
6, exhanst gas outlet 7；The cooling water outlet 8 is connected to heat exchanger 3 through negative pressure pump 5, and the cold water tank 2 is connected through cooling water pump 4
The cooling water inlet 9 of silicon carbide film component 1, heat exchanger 3 are connect with cold water tank 2.
The silicon carbide membrane tube 10 of the present invention is the tubular type silicon carbide film of port number 1-7, and aperture 20-500nm, pipe range is
0.5-2.0m。
Serial or parallel connection composite structure is used between several grades of silicon carbide film components 1 of the present invention.
It is staggered in arrangement between the silicon carbide membrane tube 10 of the present invention.
Saturated flue gas adverse current is passed through carbon by the recovery method of the flue gas waste heat recovery apparatus of the silicon carbide film based on the present invention
SiClx membrane module 1 is controlled crossflow velocity, the transmembrane pressure of silicon carbide membrane tube 10 by negative pressure pump 5, is controlled by cooling water pump 4
Recirculated water side water flow velocity absorbs fume afterheat using flow.
Embodiment 1
The saturated flue gas adverse current that temperature is 80 DEG C is passed through into 40nm thtee-stage shiplock silicon carbide film components, control crossflow velocity
6m/s, transmembrane pressure 0.5bar, recirculated water side water flow velocity 3.3m/s, detection flue gas is by temperature change and water before and after silicon carbide film
Through the water temperature variation of circulation side after silicon carbide film and the mass change of water after steam condensation.
Flue gas water content 35% before separation, flue-gas temperature is down to 60 DEG C after separation, and moisture is less than 14%.Circulating water temperature
Rise about 2 DEG C.
It follows that in whole process, for the vapor rate of recovery up to 60%, energy recovery rate reaches 55%, calculates knot
Fruit is as follows：The vapor rate of recovery=m/V ρ RH=10kg/ (80m3/h·376g/m3559g/kg dry air)=60%.
Wherein：m：Recycle biodiversity (kg), V：Flue gas flow (m3/ h), ρ：Smoke density (g/m3), RH：Flue gas is full under certain temperature
With humidity (g/kg dry air).
Heat recovery rate=cm △ t/ (V ρ H)=4.2kJ/kg DEG C of 3m3/h·995kg/m3·2℃/(80m3/
h·376g/m31529kJ/kg)=54%.Wherein, c：The specific heat capacity (kJ/kg DEG C) of water, △ t：The Wen Sheng of recirculated water
(DEG C), H：The enthalpy (kJ/kg humid air) of flue gas under certain temperature.
Embodiment 2
The flue gas that a large amount of vapor are carried in power plant of the exhaust gas temperature at 110 DEG C is passed through into 5nm single tube silicon carbide films
Separator, control crossflow velocity are 0.048ms-1, and the flow velocity of transmembrane pressure 0.4MPa, per-meate side recirculated water are
2.5Lh-1, detection flue gas by before and after silicon carbide film temperature change and vapor condensation after through being followed after silicon carbide film
The variation of the coolant-temperature gage of ring side and the variation of water quality.The rate of recovery of vapor can reach 16%, and energy recovery rate reaches
12%.
Embodiment 3
The flue gas that a large amount of vapor are carried in power plant of the exhaust gas temperature at 110 DEG C is passed through into 5nm single tube silicon carbide films
Separator, control crossflow velocity are 0.048ms-1, and the flow velocity of transmembrane pressure 0.4MPa, per-meate side recirculated water are
2.5Lh-1, detection flue gas by before and after silicon carbide film temperature change and vapor condensation after through being followed after silicon carbide film
The variation of the coolant-temperature gage of ring side and the variation of water quality.The rate of recovery of vapor can reach 16%, and energy recovery rate reaches
12%.
Although preferred embodiments are disclosed above by the present invention, however, it is not to limit the invention.Have belonging to of the invention logical
Normal skill, without departing from the spirit and scope of the present invention, when can make it is various change and retouching.Therefore, protection of the invention
Range is when subject to those as defined in claim.
Claims (5)
1. a kind of flue gas waste heat recovery apparatus based on silicon carbide film, it is characterised in that：Including several grades of silicon carbide film components
(1), cold water tank (2), heat exchanger (3), cooling water pump (4), negative pressure pump (5), every grade of silicon carbide film component (1) include setting
Several silicon carbide membrane tubes (10) in shell (11), the both ends of silicon carbide membrane tube (10) length direction are respectively set cold
But water out (8), cooling water inlet (9)；The periphery setting flue gas cross-flow channel of silicon carbide membrane tube (10) length direction, institute
Smoke inlet (6), exhanst gas outlet (7) is respectively set in the both ends for stating flue gas cross-flow channel；The cooling water outlet (8) is through negative pressure pump
(5) heat exchanger (3), cooling water inlet of the cold water tank (2) through cooling water pump (4) connection silicon carbide film component (1) are connected to
(9), heat exchanger (3) is connect with cold water tank (2).
2. the flue gas waste heat recovery apparatus according to claim 1 based on silicon carbide film, it is characterised in that：The silicon carbide
Membrane tube (10) is the tubular type silicon carbide film of port number 1-7, aperture 20-500nm, pipe range 0.5-2.0m.
3. the flue gas waste heat recovery apparatus according to claim 1 based on silicon carbide film, it is characterised in that：Several grades
Serial or parallel connection composite structure is used between silicon carbide film component (1).
4. the flue gas waste heat recovery apparatus according to claim 1 based on silicon carbide film, it is characterised in that：The silicon carbide
Membrane tube is staggered in arrangement between (10).
5. the recovery method of the flue gas waste heat recovery apparatus based on silicon carbide film described in claim 1, it is characterised in that：It will satisfy
With flue gas adverse current by silicon carbide film component (1), crossflow velocity, the cross-film of silicon carbide membrane tube (10) are controlled by negative pressure pump (5)
Pressure difference absorbs fume afterheat by cooling water pump (4) control loop water side water flow velocity using flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810608512.4A CN108499326A (en) | 2018-06-13 | 2018-06-13 | A kind of flue gas recovery device and recovery method based on silicon carbide film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810608512.4A CN108499326A (en) | 2018-06-13 | 2018-06-13 | A kind of flue gas recovery device and recovery method based on silicon carbide film |
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| Publication Number | Publication Date |
|---|---|
| CN108499326A true CN108499326A (en) | 2018-09-07 |
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| CN201810608512.4A Withdrawn CN108499326A (en) | 2018-06-13 | 2018-06-13 | A kind of flue gas recovery device and recovery method based on silicon carbide film |
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| CN (1) | CN108499326A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109126363A (en) * | 2018-10-31 | 2019-01-04 | 南京圣卡孚科技有限公司 | A kind of method and device for eliminating white cigarette containing wet flue gas |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU94037368A (en) * | 1994-10-05 | 1997-01-10 | Воронежский государственный университет | Method for forming silicon carbide film on substrate |
| CN102659446A (en) * | 2012-03-31 | 2012-09-12 | 中国科学院金属研究所 | Pure SiC membrane tube support and preparation method thereof |
| CN105299676A (en) * | 2015-09-16 | 2016-02-03 | 华北电力大学 | Smoke moisture and waste heat recovery device based on hollow micro-nano porous ceramic membranes |
| CN105727755A (en) * | 2014-12-09 | 2016-07-06 | 中国科学院金属研究所 | Gradient-pore silicon nitride and silicon carbide combined film tube and preparation method therefor |
| CN106938146A (en) * | 2017-03-24 | 2017-07-11 | 江苏科行环保科技有限公司 | A kind of device of utilization flue gas heat content concentrated vitriol ammonium slurries |
| CN107115776A (en) * | 2017-04-18 | 2017-09-01 | 长沙紫宸科技开发有限公司 | One kind CO suitable for cement kiln flue gas2The change system continuously trapped |
-
2018
- 2018-06-13 CN CN201810608512.4A patent/CN108499326A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU94037368A (en) * | 1994-10-05 | 1997-01-10 | Воронежский государственный университет | Method for forming silicon carbide film on substrate |
| CN102659446A (en) * | 2012-03-31 | 2012-09-12 | 中国科学院金属研究所 | Pure SiC membrane tube support and preparation method thereof |
| CN105727755A (en) * | 2014-12-09 | 2016-07-06 | 中国科学院金属研究所 | Gradient-pore silicon nitride and silicon carbide combined film tube and preparation method therefor |
| CN105299676A (en) * | 2015-09-16 | 2016-02-03 | 华北电力大学 | Smoke moisture and waste heat recovery device based on hollow micro-nano porous ceramic membranes |
| CN106938146A (en) * | 2017-03-24 | 2017-07-11 | 江苏科行环保科技有限公司 | A kind of device of utilization flue gas heat content concentrated vitriol ammonium slurries |
| CN107115776A (en) * | 2017-04-18 | 2017-09-01 | 长沙紫宸科技开发有限公司 | One kind CO suitable for cement kiln flue gas2The change system continuously trapped |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109126363A (en) * | 2018-10-31 | 2019-01-04 | 南京圣卡孚科技有限公司 | A kind of method and device for eliminating white cigarette containing wet flue gas |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180907 |
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