CN202419679U - Flue gas desulfurization system - Google Patents
Flue gas desulfurization system Download PDFInfo
- Publication number
- CN202419679U CN202419679U CN2011205234784U CN201120523478U CN202419679U CN 202419679 U CN202419679 U CN 202419679U CN 2011205234784 U CN2011205234784 U CN 2011205234784U CN 201120523478 U CN201120523478 U CN 201120523478U CN 202419679 U CN202419679 U CN 202419679U
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- flue
- explosion
- baffle door
- flue gas
- proof valve
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Abstract
The utility model discloses a flue gas desulfurization system, and belongs to the field of resource and environment protection. The flue gas desulfurization system comprises a control mechanism, an absorption tower and flues, wherein the flues comprise an inlet flue, an outlet flue and a bypass flue for communicating the inlet flue with the outlet flue; a booster fan is arranged on the inlet flue; a first baffle door is arranged in the flue on the flue gas outlet side of the booster fan; a second baffle door is arranged in the outlet flue; a third baffle door is arranged in the bypass flue; a fourth baffle door is arranged on the flue gas inlet side of the bypass flue, which is arranged in the inlet flue; explosion-proof mechanisms comprising pressure sensors and explosion-proof valves with control switches are arranged on the flues on the flue gas inlet sides of the first baffle door, the second baffle door and the fourth baffle door; and signal output ends of the pressure sensors and the control switches of the explosion-proof valves are all connected with the control mechanism. Through applying the safety explosion-proof valves to the desulfurization system, the safety of the desulfurization system is greatly improved and a good environment is provided for normal operation of a boiler.
Description
Technical field
The utility model relates to resource and environment protection field, is specifically related to a kind of flue gas desulphurization system.
Background technology
Wet process of FGD (FGD) technology is the leading technology of present flue gas desulfurization, increases gradually along with what the FGD device was used, how to guarantee that it is safe, efficient, low cost movement is more and more important, becomes the focus that all users pay close attention to.
The FGD device generally is installed in the downstream of electric precipitation, links to each other with boiler body through flue.In order to overcome the SR of flue, increased booster fan, booster fan and gas approach thereof are the top of FGD device, link to each other with the exhaust pass of deduster.Air-introduced machine is sent into the electric cleaner dedusting after boiler smoke is drawn, and the flue gas after the dedusting gets into the FGD device.The distribution mode of a whole set of FGD is comparatively complicated, is divided into absorption plant, oxidation unit, EGR, gas approach, bypass flue and exhaust pass, and many group baffle doors need be set.Because system complex; Fluctuate widely if any controlling the improper inlet flue duct pressure that will cause, directly influence furnace pressure, serious even can cause boiler main fuel trip protection action; Cause boiler flame-out, when the pressure oscillation amplitude is excessive even can make the flue explosion or inhale flat.
Industrial Boiler can often be regulated the burning load of boiler according to the production needs, and is low when high when causing exporting exhaust gas volumn, thereby low when high when causing the flue gas pressures of boiler export flue.The operation of FGD device need be served the production of enterprise; In order to guarantee the normal operation of boiler; Prevent boiler furnace and trip, stop working because hypertonia or mistake are low; Need in time regulate according to the load variations of boiler, reduce the boiler furnace pressure oscillation, guarantee the good operation of boiler and system the aperture of each baffle door in the device.But gas baffle appears in regular meeting in actual motion control, the regulation and control of booster fan stator are unusual, and booster fan fault trip etc. causes that flue pressure fluctuates widely and jeopardizes safe operation of the boiler; FGD exists problems such as deposition is stopped up, slurries are excessive, monitoring system is not normal also can influence the FGD safe operation.
Summary of the invention
The utility model provides a kind of flue gas desulphurization system, safety, stable, practicality is wide.
A kind of flue gas desulphurization system; Comprise controlling organization, absorption tower and flue; Described flue comprises gas approach, exhaust pass and the bypass flue that is communicated with gas approach and exhaust pass, and described gas approach is provided with booster fan, is provided with first baffle door in the flue of said booster fan exhanst gas outlet side; Be provided with the second baffle door in the described exhaust pass; Be provided with the 3rd baffle door in the described bypass flue, be positioned at bypass flue gas entrance side in the said gas approach and be provided with the 4th baffle door, be equipped with explosion-proof mechanism on the flue of described first baffle door, second baffle door and the 4th baffle door smoke inlet side; Said explosion-proof mechanism comprises pressure sensor and the Explosion-proof valve that has gauge tap, and the signal output part of said pressure sensor all is connected controlling organization with the gauge tap of Explosion-proof valve.
Described Explosion-proof valve comprises the cylindrical shell that is communicated with flue and the cover plate on the cylindrical shell; The diameter of said cylindrical shell is the 60-80% of the flue caliber of Explosion-proof valve installation place; Highly be 0.8-1m, Explosion-proof valve and pressure sensor are installed in the flue level and the vertical section middle is the place that flue does not have bending, and the flue internal pressure is more even here; Pressure detecting is more accurate, and the Explosion-proof valve pressure release is quicker.
Be provided with carbon seal ring between described cylindrical shell and the cover plate, the flue-gas temperature of FGD device is between 50-300 ℃, and Explosion-proof valve adopts graphite as sealing ring, prevents gas leakage.
Be provided with demist layer, spraying layer and stock tank in the described absorption tower from top to bottom successively.
Pressure sensor is used to measure the gas pressure size in the explosion-proof mechanism installation place flue, according to the safe operation requirement of boiler furnace and FGD device, the flue of each explosion-proof mechanism installation place is provided with the safe pressure scope.When the pressure in the explosion-proof mechanism installation place flue surpasses the safe pressure scope; The pressure signal of pressure sensor feeds back to controlling organization rapidly; The gauge tap of controlling organization acknowledge(ment) signal control Explosion-proof valve, system opens Explosion-proof valve pressure release and release alarm signal automatically.After Explosion-proof valve was opened pressure release, flue gas pressures can descend or rise to the safe pressure scope near the flue the Explosion-proof valve, and Explosion-proof valve is closed automatically.
The beneficial effect of the utility model:
Explosion-proof mechanism before first baffle door prevents mainly that first baffle door from closing automatically and is used to protect booster fan exhaust pass and equipment when breaking down.Second baffle explosion-proof mechanism in front of the door mainly prevents the second baffle door protection absorption tower exhaust pass that breaks down when closing automatically.Through the application of explosion-proof mechanism in desulphurization system, the security that has improved desulphurization system greatly is for the normal operation of boiler provides good environment.
Description of drawings
Fig. 1 is the structural representation of the utility model.
The specific embodiment
As shown in Figure 1, a kind of flue gas desulphurization system comprises the controlling organization (not shown); Controlling organization is selected PLC for use, absorption tower 4, and spray column is selected on absorption tower 4 for use; Inside is provided with demist layer 18, spraying layer 19 and stock tank 20 from top to bottom successively, and demist layer 18 is provided with two-layer, and spraying layer 19 is provided with three layers; Absorption tower 4 is provided with three circulating pumps 17; The arrival end of each circulating pump 17 is communicated with stock tank 20, the port of export is communicated with each layer spraying layer 19 respectively, and gas approach 14 is communicated with the sidewall on absorption tower 4, and exhaust pass 15 is communicated with the top on absorption tower 4; The port of export of exhaust pass 15 is communicated with chimney 13; Bypass flue 16 is communicated with gas approach 14 and exhaust pass 15, between bypass flue 16 bifurcation and absorption tower 4, is being provided with the booster fan 3 that is communicated with gas approach 14 on the gas approach 14, and electric cleaner 1 is installed in the arrival end of gas approach 14;
Be provided with one the 4th baffle door 2 in the rectangular flue between deduster 1 and bypass flue 16 bifurcation; Horizontal segment (horizontal segment uniform diameter) middle on the flue of the smoke inlet side (promptly between the 4th baffle door 2 and the deduster 1) of the 4th baffle door 2 is provided with one the 3rd explosion-proof mechanism; The 3rd explosion-proof mechanism comprises the 3rd pressure sensor 6 and the 3rd Explosion-proof valve 5; The 3rd Explosion-proof valve 5 has gauge tap, and the gauge tap of the 3rd Explosion-proof valve 5 is connected with PLC with the signal output part of the 3rd pressure sensor 6;
First Explosion-proof valve 8, second Explosion-proof valve 12, the 3rd Explosion-proof valve 5 include the cylindrical shell that is communicated with flue and the cover plate on the cylindrical shell; Cylindrical shell is circular; Diameter be the Explosion-proof valve installation place the flue caliber 80%, highly be 1m, be provided with carbon seal ring between the cylindrical shell of Explosion-proof valve and the cover plate.
Every layer of spraying layer 19 is made up of the plurality of nozzles that is installed on the pipeline; The structure of every layer of demist layer 18 is the deflection plate demister that flat board or ridge type are arranged.
Principle of the utility model and method for using:
After entering deduster 1 carried out dedusting after flue gas came out from boiler induced-draft fan; Get into gas approach 14; By carrying out wet desulphurization in the booster fan 3 introducing absorption towers 4, change in order in time to adapt to boiler load, guarantee that boiler furnace pressure is normal; Increase the 4th baffle door 2, second baffle door 7 and the 3rd baffle door 10 respectively; Be used to regulate the import and export aperture of booster fan 3, the flue gas pressures in the control gas approach 14, first pressure sensor 9 and the 3rd pressure sensor 6 are used to monitor the flue gas pressures in the gas approach 14.
In the operation control procedure, booster fan 3 porch are negative pressure, so more help inlet flue gas and flow, and consider device security, the safe pressure scope of first Explosion-proof valve 8 is set to-3000～+ 800Pa.Booster fan 3 outlet is malleation, if hypotony explanation booster fan 3 inlets maybe be dead by fail close, so the safe pressure scope of the 3rd Explosion-proof valve 5 be set to+300～+ 6000Pa.Absorption tower 4 exhanst gas outlets are generally near normal pressure; Hypertonia explanation second baffle door 11 breaks down and closes extremely; Hypotony can with the bypass high-temperature flue gas from the absorption tower 4 top suck-backs; Scorch demister 18 and anticorrosive coat, thus the safe pressure scope of second Explosion-proof valve 12 be set to-500～+ 500Pa.
When booster fan 3 inlet pressures are higher than safe flue gas pressures, explain that boiler load rises, first baffle door, 7 apertures are less than normal, and first Explosion-proof valve 8 is opened pressure release automatically, and sends the signal prompt operating personnel and adjust first baffle door 7; When boiler load reduced, booster fan 3 inlet flue gas pressure were lower than the safe pressure scope, and the 3rd Explosion-proof valve 5 is also opened automatically and reported to the police, and alert turns down first baffle door 7.
When boiler load increases or the 3rd baffle door 10 when leaking flue gases, first pressure sensor 9 can detect pressure and be higher than the safe pressure scope, opens first Explosion-proof valve 8 automatically and carries out pressure release, and send the alarm operating personnel and analyze reason and deal with problems.
When second baffle door 11 is closed owing to fault automatically, can cause exhaust pass 15 flue gas pressures to surpass the safe pressure scope, second Explosion-proof valve 12 can be opened pressure release and alert inspection reason automatically, opens second baffle door 11 rapidly; When the 3rd baffle door 10 faults are opened, can cause exhaust pass 15 flue gas pressures to be lower than the safe pressure scope, second Explosion-proof valve 12 can be opened automatically, and sends the alarm operating personnel.
Through the application of safety anti-explosive valve in desulphurization system, the security that has improved desulphurization system greatly is for the normal operation of boiler provides good environment.
Claims (4)
1. flue gas desulphurization system; Comprise controlling organization, absorption tower (4) and flue; Described flue comprises gas approach (14), exhaust pass (15) and the bypass flue (16) that is communicated with gas approach (14) and exhaust pass (15); Described gas approach (14) is provided with booster fan (3), is provided with first baffle door (7) in the flue of said booster fan (3) exhanst gas outlet side, is provided with second baffle door (11) in the described exhaust pass (15); Be provided with the 3rd baffle door (10) in the described bypass flue (16); It is characterized in that, be positioned at bypass flue (16) smoke inlet side in the said gas approach (14) and be provided with the 4th baffle door (2), be equipped with explosion-proof mechanism on the flue of described first baffle door (7), second baffle door (11) and the 4th baffle door (2) smoke inlet side; Said explosion-proof mechanism comprises pressure sensor and the Explosion-proof valve that has gauge tap, and the signal output part of said pressure sensor all is connected controlling organization with the gauge tap of Explosion-proof valve.
2. flue gas desulphurization system according to claim 1 is characterized in that, described Explosion-proof valve comprises the cylindrical shell that is communicated with flue and the cover plate on the cylindrical shell, and the diameter of said cylindrical shell is the 60-80% of the flue caliber of Explosion-proof valve installation place, highly is 0.8-1m.
3. flue gas desulphurization system according to claim 2 is characterized in that, is provided with carbon seal ring between described cylindrical shell and the cover plate.
4. flue gas desulphurization system according to claim 1 is characterized in that, is provided with demist layer (18), spraying layer (19) and stock tank (20) in described absorption tower (4) from top to bottom successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205234784U CN202419679U (en) | 2011-12-14 | 2011-12-14 | Flue gas desulfurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205234784U CN202419679U (en) | 2011-12-14 | 2011-12-14 | Flue gas desulfurization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202419679U true CN202419679U (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205234784U Expired - Lifetime CN202419679U (en) | 2011-12-14 | 2011-12-14 | Flue gas desulfurization system |
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| Country | Link |
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| CN (1) | CN202419679U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106237813A (en) * | 2016-08-30 | 2016-12-21 | 嘉善金亿精密铸件有限公司 | A kind of stable-pressure device |
| CN107158907A (en) * | 2017-06-29 | 2017-09-15 | 大连好月亮环保科技有限公司 | Oxidation plus wet absorption flue gas desulfurization and denitrification integral method and its device |
| CN112833416A (en) * | 2021-01-18 | 2021-05-25 | 西安热工研究院有限公司 | Air separation energy storage coupling oxygen-enriched combustion carbon capture integrated system and method for thermal power plant |
| CN115301065A (en) * | 2022-07-22 | 2022-11-08 | 圣戈班管道系统有限公司 | Method for removing bypass by sintering SDA (Stratagene-sulfate-sodium) semi-dry desulfurization |
-
2011
- 2011-12-14 CN CN2011205234784U patent/CN202419679U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106237813A (en) * | 2016-08-30 | 2016-12-21 | 嘉善金亿精密铸件有限公司 | A kind of stable-pressure device |
| CN107158907A (en) * | 2017-06-29 | 2017-09-15 | 大连好月亮环保科技有限公司 | Oxidation plus wet absorption flue gas desulfurization and denitrification integral method and its device |
| CN112833416A (en) * | 2021-01-18 | 2021-05-25 | 西安热工研究院有限公司 | Air separation energy storage coupling oxygen-enriched combustion carbon capture integrated system and method for thermal power plant |
| CN115301065A (en) * | 2022-07-22 | 2022-11-08 | 圣戈班管道系统有限公司 | Method for removing bypass by sintering SDA (Stratagene-sulfate-sodium) semi-dry desulfurization |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |
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| CX01 | Expiry of patent term |