CN109157968A - A kind of device and method for flue gas desulphurization consumption reduction - Google Patents
A kind of device and method for flue gas desulphurization consumption reduction Download PDFInfo
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- CN109157968A CN109157968A CN201811169387.8A CN201811169387A CN109157968A CN 109157968 A CN109157968 A CN 109157968A CN 201811169387 A CN201811169387 A CN 201811169387A CN 109157968 A CN109157968 A CN 109157968A
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- flue gas
- slurry
- calcium hydroxide
- consumption reduction
- pump
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- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of devices of flue gas desulphurization consumption reduction, which includes: demister, chilling spray layer, slurries spraying layer, desulfurizing tower, net flue, desulfuration recycle pump, slurry heat exchanger (cooler), cool slurry circulating pump, flow control pump, calcium hydroxide slurry liquid pool；The invention also discloses a kind of methods of flue gas desulphurization consumption reduction, and this method step: flue gas enters desulfurizing tower；Desulfurization process for the first time is carried out to flue gas with lime stone slurry；Secondary desulfuration processing is carried out with certain density calcium hydroxide slurry；Cooling processing is carried out to flue gas；Demisting processing is carried out to cigarette；To flue gas processing；Gas up to standard is finally discharged.The present invention carries out secondary desulfuration using certain density calcium hydroxide solution, and calcium hydroxide solution substitutes 1 ~ 2 desulphurization circulating pump work, to play the purpose of desulphurization energy-saving under different flow control.
Description
Technical field
It lowers consumption the present invention relates to thermal power plant industrial waste gas environment protection field more particularly to a kind of flue gas desulphurization
Device and method.
Background technique
It is planned according to national prevention and control of air pollution, drug in some provinces environmental protection policy requires thermal power plant desulfurization process.At present
Use limestone-gypsum method for 80% or more large-size thermal power plant flue gas desulfurization, specific desulfurization process: flue gas is from cigarette
Road enters desulfurizing tower, and sulfur dioxide in flue gas is reacted with four layers of (four is standby with one) lime stone slurry spraying layer counter current contacting, flue gas
Middle sulfur dioxide concentration drops to 15mg/m3 by 2000mg/m3, and flue-gas temperature drops to 49.25 DEG C, flue gas by demister,
Flue gas heater, into smoke stack emission.Lime stone, that is, CaCO3 is a kind of indissoluble faintly acid salt, the reaction speed with sulfur dioxide
Slowly, and power consumption arrives, at high cost.
Since the flue gas after desulfurization will also carry out cooling white-smoke-removing operation, if in application publication number CN108421342
Equipped with the spraying cooling for being cooled down by cooling water to flue gas.
Summary of the invention
In view of this, it is necessary to provide a kind of rates of sulphur expulsion fast, power and energy saving sulfur method and device.
The present invention is somebody's turn to do in order to solve the above technical problems, a kind of provided device for flue gas desulphurization consumption reduction
Device includes: that demister, chilling spray layer, slurries spraying layer, desulfurizing tower, net flue, desulfuration recycle pump, slurry heat exchanger are (cold
But device), cool slurry circulating pump；After flue gas enters desulfurizing tower, successively after slurries spraying layer, chilling spray layer, demister,
Into net flue, it is discharged into chimney；The outlet of slurry heat exchanger (cooler) and chilling spray layer be connected, an entrance and desulfurization
The coolant return line of tower is connected；The outlet of desulfuration recycle pump is connected with slurries spraying layer, the slurry reflux of entrance and desulfurizing tower
Pipe is connected；It is characterized by also including: flow control pump, calcium hydroxide slurry liquid pool, flow control pump input terminal connect hydroxide
Calcium slurry pool for transferring out the calcium hydroxide slurry of calcium hydroxide slurry liquid pool, and can be carried out flow control.
Preferably, the slurries spraying layer is five layers, and corresponding desulfuration recycle pump is five, each layer of slurries spraying layer
One desulfuration recycle pump of corresponding desulfuration recycle pump.
Preferably, the arrival end of the output end connection cool slurry circulating pump of the flow control pump.
Preferably, the output end of the flow control pump connects the top corresponding desulfuration recycle pump of slurries spraying layer
Arrival end.
Preferably, the calcium hydroxide concentration control of the calcium hydroxide slurry liquid pool is 10 ~ 15%.
Preferably, the slurry heat exchanger (cooler) control cool slurry flow be desulphurization circulating pump discharge five/
One.
Preferably, the flow control pump control calcium hydroxide slurry flow quantity is in 100 ~ 400kg/h.
The present invention is in order to solve the above technical problems, the present invention also provides a kind of sides for flue gas desulphurization consumption reduction
Method, which is characterized in that this method comprises the following steps:
Flue gas enters desulfurizing tower；Desulfurization process for the first time is carried out to flue gas with lime stone slurry；With certain density calcium hydroxide slurry
Liquid carries out secondary desulfuration processing；Cooling processing is carried out to flue gas；Demisting processing is carried out to cigarette；To flue gas processing；Most heel row
Gas up to standard out.
The present invention has the advantages that traditional desulfurized limestone-gypsum is directed to, since lime stone is a kind of indissoluble weak acid
Property salt, it is slow with the reaction speed of sulfur dioxide, and desulfuration recycle pump power consumption is big, it is at high cost.Using certain density hydroxide
Calcium solution carries out secondary desulfuration, and substitutes 1 ~ 2 desulfuration recycle pump work under different flow control in different calcium hydroxide solutions
Make, to play the purpose of desulphurization energy-saving.
Detailed description of the invention
Fig. 1 is schematic structural diagram of the device of the invention.
It is identified in figure: 1, demister (three layers) 2, chilling spray layer 3, slurries spraying layer (five layers) 4, desulfurizing tower
(absorption tower) 5, net flue 6, desulfuration recycle pump (five) 7, slurry heat exchanger (cooler) 8, cool slurry circulation
Pump 9, flow control pump 10, calcium hydroxide slurry liquid pool.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached signal shown in FIG. 1
Figure, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only to explain this hair
It is bright, it is not intended to limit the present invention.
A kind of device of flue gas desulphurization consumption reduction of the present invention, comprising: demister 1, chilling spray layer 2, slurries spray
Layer 3, desulfurizing tower 4, net flue 5, desulfuration recycle pump 6, slurry heat exchanger (cooler) 7, cool slurry circulating pump 8, flow control
Pump 9, calcium hydroxide slurry liquid pool 10；The outlet of slurry heat exchanger (cooler) 7 and chilling spray layer 2 be connected, an entrance with
The coolant return line of desulfurizing tower 4 is connected；The outlet of desulfuration recycle pump 6 is connected with slurries spraying layer 3, entrance and desulfurizing tower 4
Slurry reflux pipe is connected；9 input terminal of flow control pump connects calcium hydroxide slurry liquid pool 10, for by calcium hydroxide slurry liquid pool 10
Calcium hydroxide slurry transfers out, and can be carried out flow control.Slurries spraying layer 3 is five layers, and corresponding desulfuration recycle pump 6 is five
Platform, each layer of slurries spraying layer 3 correspond to a desulfuration recycle pump 7, only indicate one layer in figure, indicate that it is corresponded and close
System.
In desulfurizing tower 4 slurries spraying layer 3, chilling spray layer 2, demister 1 sequence be successively to arrange from the bottom up.
Specific workflow is: after flue gas enters desulfurizing tower 4, successively passing through slurries spraying layer 3, chilling spray layer 2, removes
After day with fog 1, into net flue 5, it is discharged into chimney.
Wherein flow control pump 9 controls calcium hydroxide slurry flow quantity between 100 ~ 400kg/h, when flow control 100 ~
When between 200kg/h, the effect of one desulphurization circulating pump work of replacement can achieve；When flow control 300 ~ 400kg/h it
Between when, can achieve replacement two desulphurization circulating pump works effect.
Embodiment one: the arrival end of the output end connection cool slurry circulating pump 8 of flow control pump 9.Flue gas is from flue
Into desulfurizing tower 4, sulfur dioxide in flue gas is reacted with 3 counter current contacting of slurries spraying layer, the decline of sulfur dioxide in flue gas concentration, cigarette
The decline of temperature degree.Then flue gas passes upward through and 2 contact heat-exchanging of chilling spray layer that calcium hydroxide slurry is added and and hydroxide
Calcium solution desulfurization again, flue-gas temperature decline, sulfur dioxide concentration decline, flue gas passes through demister 1, into net flue 5, up to standard
Discharge.
Embodiment two: the output end of flow control pump 9 connects the top desulfuration recycle pump 6 of corresponding slurries spraying layer 3
Arrival end.Flue gas enters desulfurizing tower 4, the non-top counter current contacting of sulfur dioxide in flue gas and slurries spraying layer 3 from flue
It reacts, top layer is moved on on flue gas, the top layer's spray calcium hydroxide slurry and sulfur dioxide in flue gas of slurries spraying layer 3 are again
Desulphurization reaction is carried out, flue gas continues through demister 1, into net flue 5, qualified discharge.
The invention also includes: a kind of method of flue gas desulphurization consumption reduction, this method comprises the following steps:
Flue gas enters desulfurizing tower；Desulfurization process for the first time is carried out to flue gas with lime stone slurry；With certain density calcium hydroxide slurry
Liquid carries out secondary desulfuration processing；Cooling processing is carried out to flue gas；Demisting processing is carried out to cigarette；To flue gas processing；Most heel row
Gas up to standard out.
Data of the present invention carry out experimental design calculating by 1000MW unit parameter.
The calcium hydroxide slurry that side is arranged 3 × 3 × 3 meters between lime stone preparation prepares pond, compound concentration 10 ~ 15%
2 slurries of Ca (OH), by calcium hydroxide 185kg/h(slurries amount 2m3/h) desulfuration recycle pump or cool slurry circulating pump (flow is added
2500m3/h) entrance (or outlet), raising cool slurry pH value to 8 or more, top layer's slurries calcium hydroxide concentration 0.2 ~
1mmol/L。
Embodiment one is tested, sulfur dioxide in flue gas and three layers of (three is standby with two) lime stone slurry spraying layer counter current contacting
Reaction, sulfur dioxide in flue gas concentration drop to 50mg/m3 by 2000mg/m3, and flue-gas temperature drops to 49.25 DEG C.Then cigarette
Gas passes through and chilling spray layer (flow 2500m3/h) contact heat-exchanging of addition calcium hydroxide slurry and desulfurization, flue-gas temperature decline
To 45 DEG C hereinafter, sulfur dioxide concentration is to 10mg/m3 hereinafter, flue gas passes through demister, flue gas heater, into chimney row up to standard
It puts.
Embodiment two is tested, and flue gas enters desulfurizing tower, sulfur dioxide in flue gas and three layers of (three is standby with two) stone from flue
The reaction of lime stone slurries spraying layer counter current contacting, wherein calcium hydroxide slurry, most upper spraying layer calcium hydroxide is added in top layer's slurries
Concentration 0.2mmol/L, sulfur dioxide in flue gas concentration drop to 15mg/m3 by 2000mg/m3, and flue gas is by demister, entrance
Smoke stack emission.
Energy consumption calculates, and a desulphurization circulating pump discharge 12500m3/h operation is added by calcium hydroxide flow 2500m3/h
Afterwards, generating acid-base reaction moment with sulfur dioxide in flue gas completes, than with the fast an order of magnitude of the reaction speed of calcium carbonate.It is cooling
Serum recycle pump power 350kw reduces desulfurization load 1050kw instead of a desulphurization circulating pump power 1400kw.It can make entire
Desulphurization system power consumption reduces by 20 ~ 25%, and desulphurization system operating cost reduces by 10%.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
It is right according to the technical essence of the invention for the equivalent embodiment of equivalent variations, but without departing from the technical solutions of the present invention
Any simple modification, equivalent change and modification made by above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (8)
1. a kind of device of flue gas desulphurization consumption reduction, which includes: demister (1), chilling spray layer (2), slurries spray
Drenching layer (3), desulfurizing tower (4), net flue (5), desulfuration recycle pump (6), slurry heat exchanger (cooler) (7), cool slurry circulation
It pumps (8)；After flue gas enters desulfurizing tower (4), successively after slurries spraying layer (3), chilling spray layer (2), demister (1), into
Enter net flue (5), is discharged into chimney；The outlet of slurry heat exchanger (cooler) (7) and chilling spray layer (2) be connected, one enters
Mouth is connected with the coolant return line of desulfurizing tower (4)；The outlet of desulfuration recycle pump (6) is connected with slurries spraying layer (3), entrance with
The slurry reflux pipe of desulfurizing tower (4) is connected；It is characterized by also including: flow control pump (9), calcium hydroxide slurry liquid pool (10),
Flow control pump (9) input terminal connects calcium hydroxide slurry liquid pool (10), is used for the calcium hydroxide of calcium hydroxide slurry liquid pool (10)
Slurries transfer out, and can be carried out flow control.
2. a kind of device of flue gas desulphurization consumption reduction as described in claim 1, it is characterised in that: the slurries spraying layer
It (3) is five layers, corresponding desulfuration recycle pump (6) is five, the corresponding desulfuration recycle pump (6) of each layer of slurries spraying layer (3)
One desulfuration recycle pump.
3. a kind of device of flue gas desulphurization consumption reduction as described in claim 1, it is characterised in that: the flow control pump
(9) arrival end of output end connection cool slurry circulating pump (8).
4. a kind of device of flue gas desulphurization consumption reduction as described in claim 1, it is characterised in that: the flow control pump
(9) arrival end of the top corresponding desulfuration recycle pump (7) of output end connection slurries spraying layer (3).
5. a kind of device of flue gas desulphurization consumption reduction as described in claim 1, it is characterised in that: the calcium hydroxide slurry
The calcium hydroxide concentration control of liquid pool (10) is 10 ~ 15%.
6. a kind of device of flue gas desulphurization consumption reduction as claimed in claim 1 or 3, it is characterised in that: the slurries change
Hot device (cooler) (7) control cool slurry flow is 1/5th of desulfuration recycle pump (6) flow.
7. a kind of device of flue gas desulphurization consumption reduction as described in claim 1, it is characterised in that: the flow control pump
(9) control calcium hydroxide slurry flow quantity is in 100 ~ 400kg/h.
8. a kind of method of flue gas desulphurization consumption reduction, which is characterized in that this method comprises the following steps:
Flue gas enters desulfurizing tower；Desulfurization process for the first time is carried out to flue gas with lime stone slurry；With certain density calcium hydroxide slurry
Liquid carries out secondary desulfuration processing；Cooling processing is carried out to flue gas；Demisting processing is carried out to cigarette；To flue gas processing；Most heel row
Gas up to standard out.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811169387.8A CN109157968A (en) | 2018-10-08 | 2018-10-08 | A kind of device and method for flue gas desulphurization consumption reduction |
| PCT/CN2019/078658 WO2020073613A1 (en) | 2018-10-08 | 2019-03-19 | Device and method for flue gas desulfurization and consumption reduction in heat-engine plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811169387.8A CN109157968A (en) | 2018-10-08 | 2018-10-08 | A kind of device and method for flue gas desulphurization consumption reduction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109157968A true CN109157968A (en) | 2019-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811169387.8A Pending CN109157968A (en) | 2018-10-08 | 2018-10-08 | A kind of device and method for flue gas desulphurization consumption reduction |
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| Country | Link |
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| CN (1) | CN109157968A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020073613A1 (en) * | 2018-10-08 | 2020-04-16 | 李申强 | Device and method for flue gas desulfurization and consumption reduction in heat-engine plant |
| CN113694710A (en) * | 2021-09-29 | 2021-11-26 | 山西省工业设备安装集团有限公司 | Coke oven flue gas desulfurization and purification device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103599690A (en) * | 2013-11-12 | 2014-02-26 | 山东中实易通集团有限公司 | Composite limestone/calcium hydroxide gypsum wet desulfurization device and technique |
| CN207230587U (en) * | 2017-09-09 | 2018-04-13 | 江苏瑞鼎环境工程有限公司 | Heating eliminates the integral type chimney of white cigarette |
| CN108273370A (en) * | 2018-03-02 | 2018-07-13 | 无锡雪浪环境科技股份有限公司 | A kind of combination flue gas takes off white wet type fume sweetening device and its application method |
| CN108295633A (en) * | 2018-03-13 | 2018-07-20 | 中国华电科工集团有限公司 | A kind of device and method for heat-engine plant desulfurized tower loop slurry cooling eliminating white smoke |
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2018
- 2018-10-08 CN CN201811169387.8A patent/CN109157968A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103599690A (en) * | 2013-11-12 | 2014-02-26 | 山东中实易通集团有限公司 | Composite limestone/calcium hydroxide gypsum wet desulfurization device and technique |
| CN207230587U (en) * | 2017-09-09 | 2018-04-13 | 江苏瑞鼎环境工程有限公司 | Heating eliminates the integral type chimney of white cigarette |
| CN108273370A (en) * | 2018-03-02 | 2018-07-13 | 无锡雪浪环境科技股份有限公司 | A kind of combination flue gas takes off white wet type fume sweetening device and its application method |
| CN108295633A (en) * | 2018-03-13 | 2018-07-20 | 中国华电科工集团有限公司 | A kind of device and method for heat-engine plant desulfurized tower loop slurry cooling eliminating white smoke |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020073613A1 (en) * | 2018-10-08 | 2020-04-16 | 李申强 | Device and method for flue gas desulfurization and consumption reduction in heat-engine plant |
| CN113694710A (en) * | 2021-09-29 | 2021-11-26 | 山西省工业设备安装集团有限公司 | Coke oven flue gas desulfurization and purification device |
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Application publication date: 20190108 |