CN206334493U - Reduce the flue gas pretreatment system that coal combustion flue gas CO2 traps energy consumption - Google Patents
Reduce the flue gas pretreatment system that coal combustion flue gas CO2 traps energy consumption Download PDFInfo
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- CN206334493U CN206334493U CN201621463518.XU CN201621463518U CN206334493U CN 206334493 U CN206334493 U CN 206334493U CN 201621463518 U CN201621463518 U CN 201621463518U CN 206334493 U CN206334493 U CN 206334493U
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- heat exchanger
- flue gas
- vacuum flash
- flash apparatus
- pretreatment system
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- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- 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
- Y02E20/32—Direct CO2 mitigation
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- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model is related to a kind of for reducing coal combustion flue gas CO2The flue gas pretreatment system of energy consumption is trapped, belongs to coal combustion flue gas CO2Trap correlative technology field.Mainly include：On direct-contact heat exchanger, the flue for being arranged in desulfurizing tower exhanst gas outlet, heat exchanger is internally provided with spraying layer and demister, and heat exchanger top passes through flue and CO2Capturing device is connected；Be provided with vacuum flash apparatus and vapour compression unit on the outside of the heat exchanger, exchanger base by pipeline successively with vacuum flash apparatus, vapour compression unit and CO2Capturing device is connected；The vacuum flash apparatus bottom is connected by pipeline with heat exchanger spraying layer so that the high-temperature water inside heat exchanger is changed into water at low temperature after vacuum flash apparatus and sprayed again out of heat exchanger.The utility model structure brand-new by designing, it is possible to achieve flue gas after desulfurization temperature is reduced, the effect that water capacity reduces and reuses waste heat.
Description
Technical field
The present invention relates to coal combustion flue gas CO2Correlative technology field is trapped, is to be related to a kind of coal-fired cigarette of reduction specifically
Road gas CO2Trap the flue gas pretreatment system of energy consumption.
Background technology
At present, CO after being burnt in coal-burning power plant2In trapping technique, alkanolamine solution absorption process is the most ripe, realizes big rule
The commercial Application of mould.Pressure-variable adsorption because of it there is the characteristics of energy consumption is low, corrosivity is weak to be similarly subjected to extensive concern, primary sorbent
For zeolite 13X, with of a relatively high CO2Adsorption capacity and selectivity.
Either alkanolamine solution absorption process or zeolite 13X pressure swing adsorption methods, trap pretreatment of the technique to coal-fired flue-gas
It is required that it is all very high, as flue-gas temperature needs to be reduced to 30 DEG C or so, flue gas SO2Content need to typically be reduced to 20mg/m3Hereinafter, to the greatest extent
Water vapour content etc. in amount reduction saturated flue gas.
But wet saturated flue gas temperature is higher than 50 DEG C after desulfurization, and there is 12-16% or so vapor, it is necessary to substantial amounts of
Extra cold is cooled in advance to flue gas, wastes more energy, while the presence of a large amount of vapor can be substantially reduced absorption
The absorptive capacity of agent, and cause trapping system water unbalance, increase trapping energy consumption.
Therefore, flue-gas temperature can be reduced by how designing one kind, reduce humidity of flue gas to reduce coal combustion flue gas CO2Catch
The problem of flue gas pretreatment system of collection energy consumption is those skilled in the art's urgent need to resolve.
The content of the invention
The purpose of the present invention be for overcome above-mentioned the deficiencies in the prior art there is provided one kind be used for reduce coal combustion flue gas CO2
Trap the flue gas pretreatment system of energy consumption.The present invention is by designing brand-new structure, it is possible to achieve flue gas after desulfurization temperature is reduced,
The effect that water capacity reduces and reuses waste heat.
In order to reach above-mentioned purpose, the present invention is adopted the following technical scheme that：
One kind is used to reduce coal combustion flue gas CO2The flue gas pretreatment system of energy consumption is trapped, including：
On direct-contact heat exchanger, the flue for being arranged in desulfurizing tower exhanst gas outlet, heat exchanger is internally provided with spraying layer
And demister, heat exchanger top passes through flue and CO2Capturing device is connected；
Be provided with vacuum flash apparatus and vapour compression unit on the outside of the heat exchanger, exchanger base by pipeline successively with
Vacuum flash apparatus, vapour compression unit and CO2Capturing device is connected；
The vacuum flash apparatus bottom is connected by pipeline with heat exchanger spraying layer so that the high-temperature water inside heat exchanger
It is changed into water at low temperature after vacuum flash apparatus to spray out of heat exchanger again.
It is preferred that, circulating pump is provided with the outside of the heat exchanger, for vacuum will to be delivered to the high-temperature water pump after flue gas heat exchange
Flash distillation plant spraying layer.
It is preferred that, spray pump is provided with the outside of the heat exchanger, for the low temperature water pump of vacuum flash apparatus bottom to be delivered to
Heat exchanger spraying layer.
It is preferred that, the vacuum flash apparatus is connected with vavuum pump, has spraying zone inside vacuum flash apparatus.
It is preferred that, the top of the vacuum flash apparatus is connected with the air inlet of steam compressor arrangement.
It is preferred that, the CO2Capturing device includes the absorption tower being connected with heat exchanger, and absorption tower also passes through rich solution-lean solution
Heat exchanger is connected with regenerator；The regenerator is connected with vapour compression unit.
The beneficial effects of the invention are as follows：
(1) desulfurizing tower outlet saturated flue gas temperature is reduced to by 50 DEG C by contact heat exchanger and vacuum flash apparatus
30 DEG C or so, " low temperature " flue gas is realized, while therefore the vapor in flue gas condense, " low water " flue gas is realized.Water at low temperature passes through
The SO of reaction is had neither part nor lot in heat exchanger spray equipment Absorption Desulfurization tower2Deng impurity, desulfuration efficiency is further improved to more than 99%,
Realize " low-sulfur " flue gas.
(2) " low temperature, low water, low-sulfur " flue gas of heat exchanger outlet flue is directly entered CO2The absorption tower of capturing device, reduction
CO2Cost 20% is trapped, CO is improved2Arresting efficiency, also, after the steam that goes out of vacuum flashing is compressed by steam compressor arrangement
It is used as CO2The part of heat energy of capturing device regenerator, reduces CO2Collecting regenerated energy consumption 30%.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
In figure：1st, smoke inlet, 2, direct-contact heat exchanger, 3, heat exchanger spraying layer, 4, heat exchanger demister, 5, smoke
Mouthful, 6, thermocouple, 7, circulating pump, 8, spray pump, 9, vavuum pump, 10, vacuum flash apparatus, 11, vacuum flash apparatus spraying layer,
12nd, vapour compression unit, 13, booster fan, 14, absorption tower, 15, rich solution-lean solution heat exchanger, 16, regenerator.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
Embodiment：One kind is used to reduce coal combustion flue gas CO2Trap the flue gas pretreatment system of energy consumption, its structure such as Fig. 1
It is shown, including：
Direct-contact heat exchanger 2, the lower left side of heat exchanger 2 is smoke inlet 1, and heat exchanger is internally provided with heat exchanger spraying layer
3 and demister 4, the upper right side of heat exchanger 2 has outlet flue 5, and outlet flue 5 passes through flue and CO2The absorption tower 14 of capturing device
Flue after connection, outlet flue is provided with thermocouple 6 and booster fan 13.
The outside of heat exchanger 2 is provided with vacuum flash apparatus 10 and vapour compression unit 12, and the bottom of heat exchanger 2 is by pipeline and follows
Ring pump 7 is connected with vacuum flash apparatus 10, vapour compression unit 12, regenerator 16 successively.
The inside of vacuum flash apparatus 10 has spraying layer 11, and top is connected with vavuum pump 9.
Vapour compression unit 12 is connected with regenerator 16, and the steam after the compression of vapour compression unit 12 is used as regenerator
Part of heat energy, reduces steam consumption, reduces regeneration energy consumption.
CO2Capturing device includes absorption tower 14, and the left side on absorption tower 14 connects with booster fan 13, right side by rich solution-
Lean solution heat exchanger 15 is connected with the left side of regenerator 16.
The present invention principle be：
Heat exchanger 2 is entered from direct-contact heat exchanger smoke inlet 1 to flow flue gas after desulfurization, is flowed then up
Dynamic, spraying layer 3 sprays downwards water at low temperature, water at low temperature and the abundant contact heat-exchanging of flue gas.Flue gas after heat exchange is removed by demister 4
The drop of carrying is from the outflow heat exchanger of outlet flue 5.Flue after heat exchanger is used to monitor the flue gas after heat exchange provided with thermocouple 6
Flue gas after temperature, reducing temperature and humidity enters absorption tower 14 by booster fan 13.Heat exchange is fallen into the high-temperature water after flue gas heat exchange
Device bottom, the spraying layer 11 for sending into vacuum flash apparatus 10 by circulating pump 7 carries out spray flash distillation.True after the ejection of spraying layer 11
Steam is flashed in Altitude, in water in itself, coolant-temperature gage reduction turns into water at low temperature to the origin of heat of water evaporation.Water at low temperature is sprayed
Pump 8 is pumped to heat exchanger spraying layer 3 causes flue-gas temperature to reduce with flue gas heat exchange again, hydrogenesis in flue gas, discharges latent heat.
Meanwhile, the steam flashed off from vacuum flash apparatus 10 is compressed to high-temperature steam through vapour compression unit 12, high
Warm steam is admitted to regenerator, as regenerator part of heat energy, reduces steam consumption, makes full use of Latent heat, reduction trapping
System regeneration energy consumption.
Employ after said structure, the present invention realizes flue gas cool-down to 30 DEG C of left sides by the heat exchange of flue gas and water at low temperature
Vapor in the right side, flue gas, which is condensed, to be separated, while being further stripped of the SO in flue gas2, it is coal-burning power plant CO2Trapping
There is provided good low temperature, low water, low-sulfur trap conditions, reduce trapping cost, the steam flashed off is filled through both vapor compression
The part of heat energy as regenerator after compression is put, cost CO is greatly reduced2Trap energy consumption.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to embodiment will be apparent for those skilled in the art, as defined herein general
Principle can be realized in other embodiments without departing from the spirit or scope of the present invention, is not described in detail
The part presented with partial enlargement, is prior art, herein without repeating.Therefore, the present invention is not intended to be limited to herein
These shown embodiments, and it is to fit to the most wide scope consistent with feature with principles disclosed herein.
Claims (6)
1. one kind is used to reduce coal combustion flue gas CO2Trap the flue gas pretreatment system of energy consumption, it is characterised in that including：
On direct-contact heat exchanger, the flue for being arranged in desulfurizing tower exhanst gas outlet, heat exchanger is internally provided with spraying layer and removed
Day with fog, heat exchanger top passes through flue and CO2Capturing device is connected；
Be provided with vacuum flash apparatus and vapour compression unit on the outside of the heat exchanger, exchanger base by pipeline successively with vacuum
Flash distillation plant, vapour compression unit and CO2Capturing device is connected；
The vacuum flash apparatus bottom is connected by pipeline with heat exchanger spraying layer so that the high-temperature water inside heat exchanger is through true
It is changed into water at low temperature after empty flash distillation plant to spray out of heat exchanger again.
2. flue gas pretreatment system according to claim 1, it is characterised in that circulating pump is provided with the outside of the heat exchanger,
For vacuum flash apparatus spraying layer will to be delivered to the high-temperature water pump after flue gas heat exchange.
3. flue gas pretreatment system according to claim 1, it is characterised in that spray pump is provided with the outside of the heat exchanger,
For the low temperature water pump of vacuum flash apparatus bottom to be delivered into heat exchanger spraying layer.
4. flue gas pretreatment system according to claim 1, it is characterised in that the vacuum flash apparatus connects with vavuum pump
It is logical, there is spraying zone inside vacuum flash apparatus.
5. flue gas pretreatment system according to claim 1, it is characterised in that the top of the vacuum flash apparatus and steaming
The air inlet of air pressure compression apparatus is connected.
6. flue gas pretreatment system according to claim 1, it is characterised in that the CO2Capturing device includes and heat exchanger
The absorption tower of connection, absorption tower is also connected by rich solution-lean solution heat exchanger with regenerator；The regenerator and vapour compression unit
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621463518.XU CN206334493U (en) | 2016-12-29 | 2016-12-29 | Reduce the flue gas pretreatment system that coal combustion flue gas CO2 traps energy consumption |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621463518.XU CN206334493U (en) | 2016-12-29 | 2016-12-29 | Reduce the flue gas pretreatment system that coal combustion flue gas CO2 traps energy consumption |
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| Publication Number | Publication Date |
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| CN206334493U true CN206334493U (en) | 2017-07-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731443A (en) * | 2016-12-29 | 2017-05-31 | 山东大学 | Reduce coal combustion flue gas CO2Trap the flue gas pretreatment system of energy consumption |
| CN114797387A (en) * | 2022-05-31 | 2022-07-29 | 华能营口热电有限责任公司 | Flue gas deep carbon capture device and method for recovering waste heat |
-
2016
- 2016-12-29 CN CN201621463518.XU patent/CN206334493U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731443A (en) * | 2016-12-29 | 2017-05-31 | 山东大学 | Reduce coal combustion flue gas CO2Trap the flue gas pretreatment system of energy consumption |
| CN114797387A (en) * | 2022-05-31 | 2022-07-29 | 华能营口热电有限责任公司 | Flue gas deep carbon capture device and method for recovering waste heat |
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