CN202538620U - Coal-fired power unit desulfurization system - Google Patents
Coal-fired power unit desulfurization system Download PDFInfo
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- CN202538620U CN202538620U CN2012200991119U CN201220099111U CN202538620U CN 202538620 U CN202538620 U CN 202538620U CN 2012200991119 U CN2012200991119 U CN 2012200991119U CN 201220099111 U CN201220099111 U CN 201220099111U CN 202538620 U CN202538620 U CN 202538620U
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- booster fan
- booster
- flue gas
- absorption tower
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Abstract
The utility model relates to a coal-fired power unit desulfurization system. The unit load of the system is set to be power P1 and P2, wherein P2 is more than P1. The system comprises a first booster fan, a second booster fan and a booster fan bypass flue, wherein the first booster fan, the second booster fan and the booster fan bypass flue are used for receiving raw smoke and arranged in parallel; when the unit load is between P1 and P2, the first booster fan or the second booster fan independently receives the raw smoke; when the unit load is over P2, the first booster fan and the second booster fan receive the raw smoke simultaneously; when the unit load is below the average value of P1 and P2, the booster fan bypass flue receives the raw smoke; when the unit load is between the average value of P1 and P2 and P1, an arbitrary one of the first booster fan, the second booster fan and the booster fan bypass flue receives the raw smoke; and an absorption tower is communicated with the two booster fans and the booster fan bypass flue, and is used for absorbing raw smokes in different load values and treating the raw smoke, and emitting desulfurized and purified smoke to the outside.
Description
Technical field
The utility model relates to a kind of desulphurization system of coal-fired unit.
Background technology
Along with industrial expansion, the sulfur dioxide pollution of coal-fired power plant produces deeper and deeper harm to natural environment and human lives, and this problem is also dealt with the effective desulfurization measure of various advanced persons in numerous power plants.Flue gas desulfurization FGD (Flue gas desulfurization) is a kind of desulfurization method that coal-fired power plant mainly takes; Usually in coal-fired unit, corresponding desulphurization system can be set, the former flue gas that coal combustion in the power generation process produced is passed through a series of processing of desulphurization system and is disposed to the external world.Desulphurization system can be provided with the flue gas resistance that is used to overcome the FGD device usually and booster fan that flue gas is introduced and flue gas done further processing after be disposed to extraneous absorption tower.
At present, the general pair booster fan methods of operation that adopt of large-scale coal-fired unit desulphurization system are about to two booster fans and all move, and former flue gas only gets into from two booster fans.Yet; Take the operation of this booster fan that individual defective is arranged, in system is in, during underload, takes usually to reduce the mode of two booster fan apertures and continue to move two booster fans; Like this; Can greatly aggravate the electrical loss amount of booster fan, further make the power consumption of desulphurization system improve, be unfavorable for the energy-saving and cost-reducing of power plant.
Therefore, be necessary to provide a kind of new coal-fired unit desulphurization system to improve or solve the above problems.
The utility model content
The technical problem that the utility model will solve provides a kind of coal-fired unit desulphurization system that can reduce desulphurization system power consumption, can reach the energy-saving and emission-reduction effect well.
The utility model solves above-mentioned technical problem through such technical scheme:
The utility model provides a kind of coal-fired unit desulphurization system, and system's unit load is preset as two power P 1, P2, P2＞P1 wherein, and this system comprises:
Receive first booster fan that is arranged in juxtaposition, second booster fan and the booster fan bypass flue of former flue gas; When unit load was between P1～P2, first booster fan or second booster fan received former flue gas separately; When P2 was above, first booster fan and second booster fan received former flue gas simultaneously at unit load; When the mean value of P1 and P2 was following, booster fan bypass flue received former flue gas at unit load; Wherein, when unit load is between the mean value of P1 and P2 and P1, receive former flue gas by any one in first booster fan, second booster fan or the booster fan bypass flue;
With the absorption tower that said two booster fans and booster fan bypass flue communicate, this absorption tower absorbs the former flue gas under different load value and it is handled, and the clean flue gas after the desulfurization is reached the external world.
As a kind of improvement; This system also comprises two air-introduced machines that are arranged in juxtaposition former flue gas being introduced first booster fan, second booster fan or booster fan bypass flue; Said two booster fans are arranged in juxtaposition between two air-introduced machines and absorption tower, and said booster fan bypass flue is arranged between two air-introduced machines and the absorption tower.
As a kind of improvement; Be provided with the first import baffle plate between the said first booster fan import and two air-introduced machine outlets; Establish the second import baffle plate between the second booster fan import and two air-introduced machine outlets; Also be provided with first outlet damper between outlet of first booster fan and the absorption tower import, be provided with second outlet damper between outlet of second booster fan and the absorption tower import, the booster fan bypass flue place between two air-introduced machine outlets and absorption tower import is provided with the booster fan by-pass damper.
When unit load between P1～P2, when said first booster fan or second booster fan received separately former flue gas, the first import baffle plate, first outlet damper opens or the second import baffle plate, second outlet damper are opened, the booster fan by-pass damper is closed simultaneously;
When unit load below the mean value of P1 and P2, when said booster fan bypass flue received former flue gas, the first import baffle plate, first outlet damper, the second import baffle plate, second outlet damper were all closed, the booster fan by-pass damper is opened;
When unit load more than P2, when said first booster fan and second booster fan received former flue gas simultaneously, the first import baffle plate, first outlet damper, the second import baffle plate, second outlet damper were all opened, the booster fan by-pass damper is closed.
As a kind of improvement; Said booster fan bypass flue is located near second booster fan and away from the position of first booster fan, with the transition method of operation of utilizing the second booster fan method of operation to switch mutually as the booster fan bypass method of operation and other method of operation.
As a kind of improvement, said absorption tower is provided with exhaust opening, provide one communicate with said exhaust opening and in order to clean fume emission to extraneous chimney.
As a kind of improvement, be provided with outlet damper near the exhaust opening place on absorption tower, when this outlet damper was opened, the clean flue gas after the desulfurization was sent to chimney through the exhaust opening on absorption tower.
The utlity model has following advantage: in the desulphurization system of the utility model; Several kinds of booster fan methods of operation that are suitable for the different load scope are set; So just can be, and correspondingly in the method for operation of several kinds of different booster fans, make switching with the difference of the high, medium and low load of system, can avoid in original technology middle-low load still adopted two booster fans and the phenomenon that causes most of electric weight to be depleted; Thereby reduce the power consumption of desulphurization system, realize the purpose of energy-saving and emission-reduction.
Description of drawings
Fig. 1 is the sketch map of the utility model desulphurization system;
Fig. 2 is that the utility model booster fan method of operation is switched sketch map.
The specific embodiment
Specify the specific embodiment of the utility model below in conjunction with accompanying drawing.
How the utility model solution moves booster fan in the desulphurization system of coal-fired unit just can reach more purpose of power saving; As shown in Figure 1, the desulphurization system 1 of the coal-fired unit of present embodiment comprise the former dust in flue gas that produces when removing coal fired power generation two dedusters 10, will pass through former flue gas after deduster 10 dedustings import two air-introduced machines 11 handling pipeline, be received from flue gas that air-introduced machine 11 (comprising first air-introduced machine 110 and second air-introduced machine 111) transmits and in order to overcome FGD device flue gas resistance with this flue gas import desulfurizer two booster fans 12 (comprising first booster fan 120 and second booster fan 121), be received from the flue gas of booster fan output and it handled through desulfurization and with the absorption tower 13 in the external world extremely of the fume emission after the desulfurization.In the present embodiment, this system also comprises the chimney 14 that communicates with the exhaust opening on absorption tower 13, also is provided with the smoke exhaust pipe 131 that is connected the two between the exhaust opening 130 on this chimney 14 and absorption tower 13, and the effect of chimney 14 is to atmosphere with the fume emission after the desulfurization.Wherein, between the exhaust opening 130 on absorption tower 13 and chimney 14, also be provided with outlet damper 132, when system was in desulfurization fume exhaust, this baffle plate 132 was in opening.Between exporting, 120 imports of first booster fan and two air-introduced machines 11 also are provided with the first import baffle plate 122 of first booster fan 120; Also be provided with first outlet damper 123 of first booster fan 120 between 120 outlets of first booster fan and absorption tower 13 imports; Also be provided with second outlet damper 125 that also is provided with second booster fan 121 between second import baffle plate 124, the second booster fans, 121 outlets and absorption tower 13 imports of second booster fan 121 between 121 imports of second booster fan and 11 outlets of two air-introduced machines.When 120 work of first booster fan, the first import baffle plate 122 and first outlet damper 123 are opening, otherwise are closed condition; When 121 work of second booster fan, the second import baffle plate 124 and second outlet damper 125 are opening, otherwise are closed condition.Be provided with booster fan bypass flue 126 near second booster fan 121 and away from a side of first booster fan 120; This booster fan bypass flue 126 communicates with two air-introduced machines 11 and absorption tower 13; Passage is provided with booster fan by-pass damper 135, and this booster fan by-pass damper 135 is a closed condition when two booster fan load carryings.The outlet flue 112 of two air-introduced machines 11, the smoke inlet 127a of first booster fan 120, the smoke inlet 127b of second booster fan 121, the smoke inlet 128 of booster fan bypass flue 126 are communicated with each other; And through by-pass damper 129 and chimney 14 inlet connections, this by-pass damper 129 is closed condition when desulphurization system puts into operation.
Present embodiment is to be research object with the coal-fired unit of 900MW, and the method for operation of booster fan is taked following steps in this desulphurization system:
Step 001: second outlet damper 125, booster fan bypass flue 126, booster fan by-pass damper 135, absorption tower 13 and chimney 14 and by-pass damper 129 that the second import baffle plate 124, second booster fan 121 of first outlet damper 123, second booster fan 121 of the first import baffle plate 122, first booster fan 120 of two dedusters, two air-introduced machines, two booster fans (comprising first booster fan 120 and second booster fan 121), first booster fan 120 are provided; At the desulphurization system duration of work, by-pass damper 129 is in closed condition;
Step 002: will deliver to two air-introduced machines 11 through the former flue gas after two deduster 10 dedustings, so that flue gas is imported the subsequent treatment module better;
Step 003: the former flue gas of two air-introduced machines, 11 outputs is inputed to two booster fans 12 or booster fan bypass 126 processing, at this moment, judge how to move two booster fans 12 and booster fan by-pass damper 135 according to following mode:
A, when unit load at P1～P2; When present embodiment is between 400MW～500MW; Former flue gas can get into and reach the absorption tower from first booster fan 120, also can and reach the absorption tower from 121 entering of second booster fan, realizes the method for operation of single booster fan;
When first booster fan 120 gets into, the first import baffle plate 122 and first outlet damper 123 are all opened, and the second import baffle plate 124 and second outlet damper 125 and booster fan by-pass damper 135 will be closed; When second booster fan 121 gets into, the second import baffle plate 124 and second outlet damper 125 are all opened, and the first import baffle plate 122 and first outlet damper 123 and booster fan by-pass damper 135 will be closed;
B, when unit load at (P1+P2)/below 2, promptly when the mean value of two power is following, present embodiment is 450MW when following; Booster fan by-pass damper 135 is opened; Simultaneously, the first import baffle plate 122 and the second import baffle plate 124 are closed, and first outlet damper 123 and second outlet damper 125 are closed; Former flue gas gets into and reaches absorption tower 13 from booster fan bypass flue 126, realizes the method for operation of booster fan bypass;
C, when unit load more than P2; Present embodiment is 500MW when above; Booster fan by-pass damper 135 is closed; The first import baffle plate 122, first outlet damper 123 and the second import baffle plate 124 and second outlet damper 125 are opening, and former flue gas gets into and reach absorption tower 13 from first booster fan 120 and second booster fan 121, realizes the method for operation of two booster fans;
Because according to above determination methods, unit load when present embodiment is between 400MW～450MW, both can adopt single booster fan method of operation between P1 and P2 mean value and P1 the time, also can adopt the booster fan bypass method of operation.Therefore in an embodiment, be provided with the mean value of P1 and P2 and the transition load area between the P1, in this zone; Both can adopt single booster fan method of operation; Also can adopt the booster fan bypass method of operation, concrete selection principle is: when forecast demand can drop to less than P1, can adopt the booster fan bypass method of operation; When forecast demand can not drop to less than P1, can adopt single booster fan method of operation.
Step 004: the former flue gas of any one method of operation output is handled in the 13 pairs of steps 003 in absorption tower, and the clean flue gas after the desulfurization is sent to exhaust opening 130, to drain into the external world.
In the present embodiment, booster fan bypass flue is located near second booster fan 121 and away from the position of first booster fan 120.
When desulfurization work is done by system; The method of operation of three kinds of booster fans in the step 003 can be switched each other; With reference to Fig. 2, two booster fan (i.e. first booster fan 120 and the second booster fan 121) methods of operation of S1 representative among Fig. 2, S2 represents first booster fan, 120 methods of operation; S3 represents second booster fan, 121 methods of operation, and S4 represents booster fan bypass (promptly through the booster fan bypass flue 126) method of operation.The switching of the following several kinds of methods of operation can be arranged according to the conversion of unit load: two booster fan operations switch to the method for operation of booster fan bypass; Booster fan switches to the method for operation of two booster fans; Two booster fan methods of operation switch to the method for operation of first booster fan 120; First booster fan 120 switches to the method for operation of two booster fans; Two booster fan methods of operation switch to the method for operation of second booster fan 121; Second booster fan 121 switches to the method for operation of two booster fans; Second booster fan, 121 methods of operation switch to the method for operation of booster fan bypass; The booster fan bypass switches to the method for operation of second booster fan 121.In the present embodiment; Because booster fan bypass flue is near second booster fan 121; Smoke backflow is to the influence of booster fan, the method for operation that only adopts second booster fan 121 and booster fan bypass to switch each other when switching mutually in order to reduce single booster fan operation and booster fan bypass operation.
Like this, just can take to move accordingly measure according to the height of unit load is different, can reduce the kwh loss of desulphurization system effectively, can save about 1,000,000 kilowatt hours of desulfurization power consumption general every year, thereby reach the purpose of energy-saving and emission-reduction.
In summary; The coal-fired unit desulphurization system that the utility model provides; System's unit load is preset as two power P 1, P2, P2＞P1 wherein, and this system comprises first booster fan that is arranged in juxtaposition, second booster fan and the booster fan bypass flue that receives former flue gas; When unit load was between P1～P2, first booster fan or second booster fan received former flue gas separately; When P2 was above, first booster fan and second booster fan received former flue gas simultaneously at unit load; When the mean value of P1 and P2 was following, booster fan bypass flue received former flue gas at unit load; Wherein, when unit load is between the mean value of P1 and P2 and P1, receive former flue gas by any one in first booster fan, second booster fan or the booster fan bypass flue; With the absorption tower that said two booster fans and booster fan bypass flue communicate, this absorption tower absorbs the former flue gas under different load value and it is handled, and the clean flue gas after the desulfurization is reached the external world.
The above is merely the preferred embodiments of the utility model; The protection domain of the utility model does not exceed with above-mentioned embodiment; As long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection domain of putting down in writing in claims.
Claims (6)
1. coal-fired unit desulphurization system, system's unit load is preset as two power P 1, P2, and wherein P2＞P1 is characterized in that, and this system comprises:
Receive first booster fan that is arranged in juxtaposition, second booster fan and the booster fan bypass flue of former flue gas; When unit load was between P1～P2, first booster fan or second booster fan received former flue gas separately; When P2 was above, first booster fan and second booster fan received former flue gas simultaneously at unit load; When the mean value of P1 and P2 was following, booster fan bypass flue received former flue gas at unit load; Wherein, when unit load is between the mean value of P1 and P2 and P1, receive former flue gas by any one in first booster fan, second booster fan or the booster fan bypass flue;
With the absorption tower that said two booster fans and booster fan bypass flue communicate, this absorption tower absorbs the former flue gas under different load value and it is handled, and the clean flue gas after the desulfurization is reached the external world.
2. coal-fired unit desulphurization system according to claim 1; It is characterized in that: comprise two air-introduced machines that are arranged in juxtaposition former flue gas being introduced first booster fan, second booster fan or booster fan bypass flue; Said two booster fans are arranged in juxtaposition between two air-introduced machines and absorption tower, and said booster fan bypass flue is arranged between two air-introduced machines and the absorption tower.
3. coal-fired unit desulphurization system according to claim 2; It is characterized in that: be provided with the first import baffle plate between the said first booster fan import and two air-introduced machine outlets; Establish the second import baffle plate between the second booster fan import and two air-introduced machine outlets; Also be provided with first outlet damper between outlet of first booster fan and the absorption tower import; Be provided with second outlet damper between outlet of second booster fan and the absorption tower import, the booster fan bypass flue place between two air-introduced machine outlets and absorption tower import is provided with the booster fan by-pass damper
When unit load between P1～P2, when said first booster fan or second booster fan received separately former flue gas, the first import baffle plate, first outlet damper opens or the second import baffle plate, second outlet damper are opened, the booster fan by-pass damper is closed simultaneously;
When unit load below the mean value of P1 and P2, when said booster fan bypass flue received former flue gas, the first import baffle plate, first outlet damper, the second import baffle plate, second outlet damper were all closed, the booster fan by-pass damper is opened;
When unit load more than P2, when said first booster fan and second booster fan received former flue gas simultaneously, the first import baffle plate, first outlet damper, the second import baffle plate, second outlet damper were all opened, the booster fan by-pass damper is closed.
4. coal-fired unit desulphurization system according to claim 3; It is characterized in that: said booster fan bypass flue is located near second booster fan and away from the position of first booster fan, with the transition method of operation of utilizing the second booster fan method of operation to switch mutually as the booster fan bypass method of operation and other method of operation.
5. according to any described coal-fired unit desulphurization system of claim 1 to 4, it is characterized in that: said absorption tower is provided with exhaust opening, provide one communicate with said exhaust opening and in order to clean fume emission to extraneous chimney.
6. coal-fired unit desulphurization system according to claim 5 is characterized in that: the exhaust opening place near the absorption tower is provided with outlet damper, and when this outlet damper was opened, the clean flue gas after the desulfurization was sent to chimney through the exhaust opening on absorption tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200991119U CN202538620U (en) | 2012-03-16 | 2012-03-16 | Coal-fired power unit desulfurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200991119U CN202538620U (en) | 2012-03-16 | 2012-03-16 | Coal-fired power unit desulfurization system |
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| Publication Number | Publication Date |
|---|---|
| CN202538620U true CN202538620U (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200991119U Expired - Fee Related CN202538620U (en) | 2012-03-16 | 2012-03-16 | Coal-fired power unit desulfurization system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202538620U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103566747A (en) * | 2013-10-25 | 2014-02-12 | 广东电网公司电力科学研究院 | Interlocked protection control method for three-in-one induced draft fan between desulfurization system and main frame in 1045MW thermal power unit |
-
2012
- 2012-03-16 CN CN2012200991119U patent/CN202538620U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103566747A (en) * | 2013-10-25 | 2014-02-12 | 广东电网公司电力科学研究院 | Interlocked protection control method for three-in-one induced draft fan between desulfurization system and main frame in 1045MW thermal power unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20210316 |
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| CF01 | Termination of patent right due to non-payment of annual fee |