CN103071369A - Seawater desulfurization system suitable for frequency change of coal quality - Google Patents
Seawater desulfurization system suitable for frequency change of coal quality Download PDFInfo
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Abstract
The invention provides a seawater desulfurization system suitable for frequency change of coal quality. The seawater desulfurization system comprises an absorption system and a water quality recovery system. As an annular spray layer is arranged on the topmost layer of an absorbing tower and high-concentration boiler blow-off water (drum boiler) or alkali-mixed seawater (direct current furnace) are jetted, the mass transfer power and the desulfurization efficiency near a wall face can be significantly increased, and therefore the overall desulfurization efficiency is increased. A liquid redistributor is arranged under the spray layer, so that the spray liquid near the wall face can be redistributed, and the spray liquid near the wall face is dispersed into droplets again. The specific surface area is increased, and the absorbing ability is enhanced. SO2 near the wall face is absorbed again, and further the desulfurization ability near the wall face is enhanced. During the frequency change of coal quality, the amount of the sprayed seawater in the spray layer (drum boiler) or the concentration of alkali liquor (direct current furnace) are controlled in an associated mode through a second SO2 measuring point, the concentration of sulfur dioxide at an outlet is controlled, and therefore the seawater desulfurization system is suitable for the condition of frequency change of coal quality.
Description
Technical field
The present invention relates to coal fired power plant desulphurization control technical field, particularly a kind of changeable Deuslfurizing system for sea water of ature of coal that adapts to.
Background technology
China will can not change within very long a period of time in future take coal as main energy resource structure, yet the burning of coal can cause serious environmental problem, the acid rain problem that causes such as the discharging because of oxysulfide.Appearance along with " thermal power plant's air pollution emission standard " GB13223-2011, Air Pollutant Emission limit value standard before in thermal power plant has reduced by 4 times, this can find out the resolution of China aspect acid rain improvement on the one hand, also is the test very large to desulfur technology on the other hand.
Flue gas desulfurization with seawater mainly is to utilize the natural basicity of seawater to absorb SO
2, the seawater desulfurizing process investment is little, and without discarded object, technique is simple, and operation maintenance is convenient, does not have the problems such as fouling and obstruction, has bright development prospect.
Although flue gas sea water desulfuration technology has a lot of advantages, but engineering practice proves, still have some key technical problems to need to solve, subject matter is that sea water desulfuration is to utilize the natural basicity of seawater to carry out desulfurization, the natural basicity of seawater is limited, therefore the sea water desulfuration technology only is only applicable to middle low-sulfur coal desulfurization, and further strict along with present discharge standard, and the coal accommodation of sea water desulfuration technology will further be dwindled.Yet the ature of coal of China alters a great deal, and thermal power plant usually needs to determine the operation coal according to the height of coal price, and tends to burning inferior coal.Under this background, the accommodation of sea water desulfuration technology is very little, is key points that the sea water desulfuration technology is implemented and how to adapt to the changeable national conditions of China's ature of coal.
Summary of the invention
The object of the present invention is to provide a kind of changeable Deuslfurizing system for sea water of ature of coal that adapts to, thereby increase the coal accommodation of sea water desulfuration technology.
To achieve these goals, the present invention adopts following technical scheme:
A kind of changeable Deuslfurizing system for sea water of ature of coal that adapts to comprises absorption system and quality recovery system;
Described absorption system comprises flue gas system and sea water service system;
Described flue gas system comprises FGD inlet baffle, booster fan, absorption tower, FGD outlet damper and wet chimney; The port of export of FGD inlet baffle links to each other with the arrival end of booster fan, the booster fan port of export connects the arrival end on absorption tower, the absorption tower is provided with preaeration tank, liquid re-distributor, spraying layer, annular spraying layer and demister from the bottom to top successively, the port of export at top, absorption tower connects the arrival end of FGD outlet damper, and the port of export of FGD outlet damper connects wet chimney;
Described sea water service system comprises distribution well, pump suction pond, the first seawater booster pump and the second seawater booster pump; The port of export of distribution well connects the arrival end that pump is inhaled the pond, and the port of export that pump absorbs connects the arrival end of the first seawater booster pump and the second seawater booster pump; The port of export of the first seawater booster pump connects the preaeration tank on absorption tower; The port of export of the second seawater booster pump connects the spraying layer spray inlet end on absorption tower;
Described quality recovery system comprises oxidation fan, mixing pit, aeration tank, blowoff basin and Aeration fan; The arrival end of preaeration tank connects the port of export of oxidation fan, the port of export that connects simultaneously the first seawater booster pump, the port of export of preaeration tank connects the arrival end of mixing pit, the arrival end of mixing pit connects the port of export that pump is inhaled the pond simultaneously, the port of export of mixing pit connects the arrival end of aeration tank, the arrival end of aeration tank connects the port of export of Aeration fan simultaneously, and the port of export of aeration tank connects blowoff basin;
Spray liquid in the annular spraying layer is boiler blowdown water or mixes Aral Sea water; The bottom of annular spraying layer is provided with some spouts and sprays to the wall direction, and the wall after the injection flows to into liquid re-distributor and distributes, further absorbs near the SO of wall so that near the spray liquid the wall disperses to become droplet again
2
The present invention further improves and is: when this Deuslfurizing system for sea water connected drum boiler, described absorption system also comprised the foul drainage system that boiler blowdown water is provided, and described foul drainage system comprises boiler-steam dome, blowdown system, sedimentation basin and heat exchanger; The port of export of boiler-steam dome connects the arrival end of blowdown system, the port of export of blowdown system connects the arrival end of sedimentation basin, the port of export of sedimentation basin connects the arrival end of heat exchanger, and the port of export of heat exchanger connects the spray inlet end of the annular spraying layer in the absorption tower.
The present invention further improves and is: heat exchanger adopts double pipe heat exchanger, and inner tube passes into sewer, and outer tube passes into demineralized water; The arrival end of inner tube links to each other with the port of export of sedimentation basin, and the spray inlet end of the annular spraying layer in the port of export of inner tube and the absorption tower links to each other.
The present invention further improves and is: be provided with the 2nd SO between the port of export of FGD outlet damper and the wet chimney
2Measuring point; Regulate the absorption efficiency on absorption tower by the amount of regulating the sprayed sea water in the spraying layer under the annular spraying layer; The amount of the sprayed sea water in the spraying layer is by the 2nd SO
2The related control of measuring point.
The present invention further improves and is: when this Deuslfurizing system for sea water connected Once-through Boiler, the alkali lye of the alkali lye system that provides also was provided described absorption system; Described alkali lye system comprises alkali liquid tank, adds alkali pump and the 3rd seawater booster pump; The outlet in pump suction pond connects the entrance of the 3rd seawater booster pump, the port of export of alkali liquid tank links to each other with the arrival end that adds alkali pump simultaneously, the outlet and the 3rd seawater booster pump that add alkali pump export the spray inlet end that the seawater blending of flowing out enters the annular spraying layer in the absorption tower together, provide for annular spraying layer and mix Aral Sea water.
The present invention further improves and is: be provided with the 2nd SO between the port of export of FGD outlet damper and the wet chimney
2Measuring point; The absorption efficiency of regulating the absorption tower by the spray liquid concentration of regulating in the annular spraying layer; Spray liquid concentration is by the 2nd SO
2The related control of measuring point.
The present invention further improves and is: the absorption liquid after the desulfurization enters the preaeration tank of bottom, absorption tower, blending fresh seawater and carry out preaeration in preaeration tank simultaneously, the mixed liquor of absorption liquid and fresh seawater enters mixing pit again to be mixed with the fresh seawater of another part, enter again the aeration tank and carry out aeration recovery water quality, discharge by blowoff basin behind the aeration.
The present invention further improves and is: the blending ratio of the absorption liquid after the fresh seawater that passes in the preaeration tank and the desulfurization is 0.8; Be the fresh seawater volume with desulfurization after the ratio of volume of absorption liquid be 0.8:1.
Further improvement of the present invention is:, described liquid re-distributor is positioned under the spraying layer, on the entrance of absorption tower; Liquid re-distributor comprises some blocks of two-layer interlaced arrangement; Block is oblique triangular prism shape, comprise end face, the first bottom surface, the second bottom surface, the first baffle plate and second baffle, end face and absorption tower wall oblique lower layout at 45 ° wherein, end face is flat board or corrugated plating, be arranged at the first bottom surface of end face below and the angle between the second bottom surface less than 90 °, the first baffle plate and second baffle are vertically fixed on the end face both sides.
The present invention further improves and is: the width of the end face of upper strata block is fixed on the gap width between the end of absorption tower inwall more than or equal to adjacent lower floor block.
At the entrance on absorption tower and the pipeline before entering wet chimney be equipped with SO
2Measuring point, wherein the measuring point before the chimney that advances to wet is with the control function.For the corresponding Deuslfurizing system for sea water of drum boiler, this control point is associated with the seawater amount that sprays into the absorption tower.For Once-through Boiler for Deuslfurizing system for sea water, this control point is associated with the alkali number of mixing in the seawater.
With respect to prior art, the major advantage of system of the present invention is:
1, the superiors of the present invention spraying layer adopts annular spraying layer can significantly improve desulfuration efficiency.Reason is as follows: along with the rising of flue gas, its sulfur content reduces gradually, so mass transfer power also reduces.In order to improve the mass transfer power on upper strata, can improve on the one hand the basicity of seawater, can increase spray flux on the other hand.In fact, absorption tower central authorities seawater area coverage is larger, and absorption efficiency is very high, and all around because of adherent impact, desulfuration efficiency is low.The annular spraying layer that adopts among the present invention sprays is the mixing Aral Sea water (comprise boiler blowdown water or mix the seawater of alkali) and spray to the wall direction of high concentration, thereby can improve to a great extent near the desulfuration efficiency the wall, and then improves total desulfuration efficiency.
2, the present invention can redistribute near the wall spray liquid being provided with liquid re-distributor on the absorption tower entrance under the spraying layer, so that near the spray liquid the wall disperses to become droplet again, specific area increases, and absorbability strengthens, and again absorbs near the SO of wall
2, further strengthen near the desulphurizing ability of wall; Two bottom surfaces of liquid re-distributor consist of wedge shape, can obviously reduce the flow resistance of flue gas; Being arranged in the liquid that two baffle plates of liquid re-distributor end face both sides can effectively prevent from collecting flows out from both sides.
3, the bottom, absorption tower has increased preaeration tank among the present invention, thereby has reduced the pressure of follow-up aeration, improves the aeration effect, saves the floor space of Deuslfurizing system for sea water.Mixing fresh seawater and blending ratio in preaeration tank is 0.8, can effectively prevent absorbed SO on the one hand
2Overflow, the mode of limit aeration limit blending can reduce the dilution of absorption liquid on the other hand, improves mass transfer power, reaches than the direct better oxidation effectiveness of this mode of aeration after the blending fresh liquid in mixing pit.
4, corresponding to drum boiler, boiler blowdown water utilizes the purpose that can reach the treatment of wastes with processes of wastes against one another fully, and by regulating the sprayed sea water amount of spraying layer under the annular spraying layer, thereby the absorption efficiency that can regulate the absorption tower adapts to the variation of ature of coal.Need in the sprayed sea water of annular spraying layer, mix alkali corresponding to Once-through Boiler, thereby thereby can regulate by the concentration that changes alkali lye the variation of the absorption efficiency adaptation ature of coal on absorption tower.
Description of drawings
Fig. 1 is the Deuslfurizing system for sea water figure corresponding to drum boiler of the present invention;
Fig. 2 is the Deuslfurizing system for sea water figure corresponding to Once-through Boiler of the present invention;
Fig. 3 is the liquid re-distributor schematic diagram.
Among the figure: 1, FGD inlet baffle, 2, booster fan, the 3, the one SO
2Measuring point, 4, the absorption tower, 5, the FGD outlet damper, the 6, the 2nd SO
2Measuring point, 7, wet chimney, 8, boiler-steam dome, 9, blowdown system, 10, sedimentation basin, 11, heat exchanger, 12, the demineralized water booster pump, 13, distribution well, 14, pump is inhaled pond, 151, the first seawater booster pump, 152, the second seawater booster pump, 153, the 3rd seawater booster pump, 16, oxidation fan, 17, mixing pit, 18, the aeration tank, 19, blowoff basin, 20, Aeration fan, 21, seawater, 22, demineralized water, 23, absorption liquid, 24, sewer, 25, flue gas after the dedusting, 26, air, 27, valve, 28, the sea, 29, to oxygen-eliminating device, 30, to low-temperature heater, 31, preaeration tank, 70, liquid re-distributor, 701, end face, 702, the first bottom surface, 703, the second bottom surface, 704, the first baffle plate, 705, second baffle, 32, spraying layer, 33, the annular spraying layer, 34, demister, 80, alkali liquid tank, 90, add alkali pump.
Instrument code implication among Fig. 1, Fig. 2 sees Table 1.
Table 1
| Code | The code meaning | Code | The code meaning |
| T | Temperature | P | Pressure |
| F | Flow | SO 2 | Sulfur dioxide concentration |
| pH | The pH value | I | Show |
| C | Control | ? | ? |
The specific embodiment
With reference to shown in Figure 1, mainly comprise absorption system and quality recovery system corresponding to the changeable Deuslfurizing system for sea water of the adaptation ature of coal of drum boiler, the basic procedure connected mode is as follows:
The connected mode of absorption system flue gas flow: flue gas 25 enters the arrival end of FGD inlet baffle 1 after the dedusting, and the port of export of FGD inlet baffle 1 links to each other with the arrival end of booster fan 2, and booster fan 2 ports of export connect a SO
2The arrival end of measuring point 3, a SO
2The port of export of measuring point 3 connects the arrival end on absorption tower 4, flue gas is successively through the liquid re-distributor 70 in the absorption tower 4, spraying layer 32, annular spraying layer 33, demister 34, arrive the port of export on absorption tower 4, the port of export on absorption tower 4 connects the arrival end of FGD outlet damper 5, and the port of export of FGD outlet damper 5 connects the 2nd SO
2The arrival end of measuring point 6, the 2nd SO
2The port of export of measuring point 6 connects the operation of discharging fume of wet chimney 7.
The connected mode of absorption system seawater flow process: seawater 21 enters the entrance of distribution well 13, the port of export of distribution well 13 connects valve 27 rear connection pumps and inhales the arrival end in pond 14, the port of export in pump suction pond 14 connects the arrival end of the first seawater booster pump 151 and the second seawater booster pump 152, and the port of export of the second seawater booster pump 152 connects the spraying layer 32 spray inlet ends on absorption tower 4.
The connected mode of absorption system sewer flow process: the port of export of boiler-steam dome 8 connects the arrival end of blowdown system 9, the port of export of blowdown system 9 connects the arrival end of sedimentation basin 10, the port of export of sedimentation basin 10 connects the arrival end of heat exchanger 11, and the port of export of heat exchanger 11 connects the spray inlet end of the annular spraying layer 33 in the absorption tower 4.
The connected mode of quality recovery system: absorption liquid 23 enters preaeration tank 31, the arrival end of preaeration tank 31 connects the port of export of oxidation fan 16, the port of export that connects simultaneously the first seawater booster pump 151, the port of export of preaeration tank 31 connects the arrival end of mixing pit 17, the arrival end of mixing pit 17 connects the port of export that pump is inhaled pond 14 simultaneously, the port of export of mixing pit 17 connects the arrival end of aeration tank 18, the arrival end of aeration tank 18 connects the port of export of Aeration fan 20 simultaneously, and run in pond 19 of the port of export of aeration tank 18 connects sea 28 and carries out draining.
With reference to shown in Figure 2, mainly be divided into absorption system and quality recovery system corresponding to the changeable Deuslfurizing system for sea water of the adaptation ature of coal of Once-through Boiler, the basic procedure connected mode is as follows:
Equal identical with corresponding to drum boiler corresponding to the connected mode of the connected mode of the absorption system flue gas flow of Once-through Boiler, absorption system seawater flow process and quality recovery system.Because there is not continuous blowdown system of boiler water in Once-through Boiler, thus there is not the connected mode of absorption system sewer flow process, and have the connected mode of absorption system alkali lye flow process.
The connected mode of absorption system alkali lye flow process: the entrance that the outlet in pump suction pond 14 connects the 3rd seawater booster pump 153 links to each other, the port of export of alkali liquid tank 80 links to each other with the arrival end that adds alkali pump 90 simultaneously, and the outlet and the 3rd seawater booster pump 153 that add alkali pump 90 export the spray inlet end that seawater 21 blending of coming enter the annular spraying layer 33 in the absorption tower 4 together.
With reference to Fig. 3, liquid re-distributor 70 is positioned under the spraying layer 32, on 4 entrances of absorption tower; Liquid re-distributor 70 comprises some blocks of two-layer interlaced arrangement; Block is oblique triangular prism shape, be divided into end face 701, the first bottom surface 702 and the second bottom surface 703, the first baffle plate 704 and second baffle 705, wherein end face 701 and absorption tower 4 walls oblique lower layout at 45 °, end face 701 can be flat board or corrugated plating, is arranged at the first bottom surface 702 of end face 701 belows and the angle between the second bottom surface 703 less than 90 °, and the first baffle plate 704 and second baffle 705 are vertically fixed on end face 701 both sides.The end face 701 that near 4 walls of absorption tower spray liquid 23 can be fallen liquid re-distributor 70 absorption that again distributes.The width of the end face 701 of upper strata block is fixed on the gap width between the end of absorption tower inwall more than or equal to adjacent lower floor block, can make like this liquid homomergic flow of absorption tower inwall on upper strata block or lower floor's block, then the front end along upper strata block or lower floor's block flows down, and further absorbs near the SO of wall so that near the spray liquid the wall disperses to become droplet again
2
Operation principle corresponding to the changeable Deuslfurizing system for sea water of the adaptation ature of coal of drum boiler shown in Figure 1 is as follows:
1) temperature is down to 50 ℃ by 157 ℃ after boiler blowdown water 24 and demineralized water 22 heat exchange, and the temperature of boiler blowdown water 24 reduces, and is conducive to improve desulfuration efficiency.Boiler blowdown water 24 sprays after entering annular spraying layer 33, and annular spraying layer 33 can significantly improve near the absorption efficiency 4 walls of absorption tower.Simultaneously, the pH value of boiler blow-off 24 can reach 10 ~ 14, pH value greater than seawater 21, thereby annular spraying layer 23 can avoid 4 tops, absorption tower when adopting boiler blowdown water 24 as absorption liquid 23 mass transfer power that cause and seawater weakens because amount of sulfur contenting in smoke reduces, and can significantly improve the mass transfer power of absorption tower 4 top absorption processes.Because the application of boiler blowdown water 24 can embody the thought of the treatment of wastes with processes of wastes against one another, so no matter how ature of coal changes, boiler blowdown water all is all to use.When ature of coal changes, when for example sulfur content increases, can improve desulfuration efficiency, concrete grammar by the spray flux that improves seawater 21: with the 2nd SO
2The control of measuring point 6 and the second seawater booster pump 152 is associated, the variation of regulating the seawater spraying amount and then adapting to ature of coal by regulating the second seawater booster pump 152.
2) 4 bottom arranges preaeration tank 31 on the absorption tower, and the mode of limit blending fresh seawater (the blending ratio is 0.8) limit aeration is adopted in simultaneously preaeration, and absorption liquid is through a preaeration process, and pH raises about 1.5.If absorption liquid 23 does not carry out a preaeration process in advance, but similar traditional Deuslfurizing system for sea water absorption liquid 23 enters aeration tank 18 after directly entering mixing pit 17, can there be following shortcoming: when at first entering mixing pit, because the pH value of absorption liquid 23 is very low, in mixing pit 17, be very easy to overflow sour gas, next absorption liquid 23 enters mixing pit 17 to be mixed, be actually absorption liquid 23 has been carried out dilution to a great extent, can reduce the oxidation effectiveness of follow-up aeration process, increase the aeration investment of follow-up aeration process.
Operation principle corresponding to the changeable Deuslfurizing system for sea water of the adaptation ature of coal of Once-through Boiler shown in Figure 2 is as follows:
Alkali liquid tank 80 alkali lye out can be regulated the absorption efficiency of desulfurizing tower to adapt to the variation of ature of coal by adding alkali pump 90 and seawater 21 blending that enter annular spraying layer 33 by the alkali lye amount that adjusting is mixed in the seawater.Concrete grammar: with the 2nd SO
2Measuring point 6 and the control that adds alkali pump 90 are associated, and the size that adds alkali number by adjusting is regulated and entered the variation that annular spraying layer 33 is mixed the pH value of Aral Sea water and then adapted to ature of coal.
The operation principle of liquid re-distributor shown in Figure 3 is as follows:
Near 4 walls of absorption tower spray liquid 23 is fallen behind the end face 701 of liquid re-distributor 70 because the metering function of the first baffle plate 704 and second baffle 705 flows down to form along end face 701 and is reuptaked near the SO in the flue gas wall behind the droplet
2, further improve near the desulfuration efficiency of absorption tower 4 walls.Because the first bottom surface 702 of liquid re-distributor 70 and the second bottom surface 703 form wedge shape, so resistance increment was little when the inlet flue gas on absorption tower 4 passed through liquid re-distributor 70.System of the present invention is owing to considering that present various places all removing or the lead sealing gas bypass, so this Deuslfurizing system for sea water no longer arranges gas bypass, but are provided with the seawater bypass, and purpose is when system breaks down, and can seawater be discharged by bypass.
Seawater both can be taken from the ocean in the system of the present invention, if power plant adopts seawater to cool off, the seawater in the system is the desirable process cooling water of using from condenser also, and can arrange no longer specially intake equipment this moment, saves investment and operating cost.
Claims (9)
1. one kind adapts to the changeable Deuslfurizing system for sea water of ature of coal, it is characterized in that, comprises absorption system and quality recovery system;
Described absorption system comprises flue gas system and sea water service system;
Described flue gas system comprises FGD inlet baffle (1), booster fan (2), absorption tower (4), FGD outlet damper (5) and wet chimney (7); The port of export of FGD inlet baffle (1) links to each other with the arrival end of booster fan (2), booster fan (2) port of export connects the arrival end on absorption tower (4), absorption tower (4) is provided with preaeration tank (31), liquid re-distributor (70), spraying layer (32), annular spraying layer (33) and demister (34) from the bottom to top successively, the port of export at top, absorption tower (4) connects the arrival end of FGD outlet damper (5), and the port of export of FGD outlet damper (5) connects wet chimney (7);
Described sea water service system comprises distribution well (13), pump suction pond (14), the first seawater booster pump (151) and the second seawater booster pump (152); The port of export of distribution well (13) connects the arrival end that pump is inhaled pond (14), and the port of export of pump absorption (14) connects the arrival end of the first seawater booster pump (151) and the second seawater booster pump (152); The port of export of the first seawater booster pump (151) connects the preaeration tank (31) on absorption tower (4); The port of export of the second seawater booster pump (152) connects spraying layer (32) the spray inlet end on absorption tower (4);
Described quality recovery system comprises oxidation fan (16), mixing pit (17), aeration tank (18), blowoff basin (19) and Aeration fan (20); The arrival end of preaeration tank (31) connects the port of export of oxidation fan (16), the port of export that connects simultaneously the first seawater booster pump (151), the port of export of preaeration tank (31) connects the arrival end of mixing pit (17), the arrival end of mixing pit (17) connects the port of export that pump is inhaled pond (14) simultaneously, the port of export of mixing pit (17) connects the arrival end of aeration tank (18), the arrival end of aeration tank (18) connects the port of export of Aeration fan (20) simultaneously, and the port of export of aeration tank (18) connects blowoff basin (19);
Spray liquid in the annular spraying layer (33) is boiler blowdown water or mixes Aral Sea water; The bottom of annular spraying layer (33) is provided with (4) the wall direction injection to the absorption tower of some spouts, and the wall after the injection flows to into liquid re-distributor (70) and distributes.
2. a kind of changeable Deuslfurizing system for sea water of ature of coal that adapts to according to claim 1, it is characterized in that, when described Deuslfurizing system for sea water connects drum boiler, described absorption system also comprises the foul drainage system that boiler blowdown water is provided, and described foul drainage system comprises boiler-steam dome (8), blowdown system (9), sedimentation basin (10) and heat exchanger (11); The port of export of boiler-steam dome (8) connects the arrival end of blowdown system (9), the port of export of blowdown system (9) connects the arrival end of sedimentation basin (10), the port of export of sedimentation basin (10) connects the arrival end of heat exchanger (11), and the port of export of heat exchanger (11) connects the spray inlet end of the annular spraying layer (33) in the absorption tower (4).
3. a kind of changeable Deuslfurizing system for sea water of ature of coal that adapts to according to claim 2 is characterized in that, heat exchanger (11) adopts double pipe heat exchanger, and inner tube passes into sewer (24), and outer tube passes into demineralized water (22); The arrival end of inner tube links to each other with the port of export of sedimentation basin (10), and the spray inlet end of the annular spraying layer (33) in the port of export of inner tube and absorption tower (4) links to each other.
4. a kind of changeable Deuslfurizing system for sea water of ature of coal that adapts to according to claim 2 is characterized in that, is provided with SO between the port of export of FGD outlet damper (5) and the wet chimney (7)
2Measuring point (6); The absorption efficiency of regulating absorption tower (4) by the amount of regulating the sprayed sea water in the spraying layer (32) under the annular spraying layer (33); The amount of the sprayed sea water in the spraying layer (32) is by SO
2The related control of measuring point (6).
5. a kind of changeable Deuslfurizing system for sea water of ature of coal that adapts to according to claim 1 is characterized in that, when described Deuslfurizing system for sea water connected Once-through Boiler, the alkali lye of the alkali lye system that provides also was provided described absorption system; Described alkali lye system comprises alkali liquid tank (80), adds alkali pump (90) and the 3rd seawater booster pump (153); The entrance that the outlet in pump suction pond (14) connects the 3rd seawater booster pump (153) links to each other, the port of export of alkali liquid tank (80) links to each other with the arrival end that adds alkali pump (90) simultaneously, the outlet and the 3rd seawater booster pump (153) that add alkali pump (90) export the spray inlet end that the seawater blending of flowing out enters the annular spraying layer (33) in the absorption tower (4) together, provide for annular spraying layer (33) and mix Aral Sea water.
6. a kind of changeable Deuslfurizing system for sea water of ature of coal that adapts to according to claim 5 is characterized in that, is provided with SO between the port of export of FGD outlet damper (5) and the wet chimney (7)
2Measuring point (6); The absorption efficiency of regulating absorption tower (4) by regulating the interior spray liquid basicity of annular spraying layer (33); Spray liquid basicity is by SO
2The related control of measuring point (6).
7. a kind of changeable Deuslfurizing system for sea water of ature of coal that adapts to according to claim 1, it is characterized in that, absorption liquid after the desulfurization enters the preaeration tank (31) of bottom, absorption tower (4), blending fresh seawater and carry out preaeration in preaeration tank (31) simultaneously, the mixed liquor of absorption liquid and fresh seawater enters mixing pit (17) again to be mixed with the fresh seawater of another part, enter again aeration tank (18) and carry out aeration recovery water quality, discharge by blowoff basin (19) behind the aeration.
8. a kind of changeable Deuslfurizing system for sea water of ature of coal that adapts to according to claim 7 is characterized in that, the blending ratio of the absorption liquid after the fresh seawater that passes in the preaeration tank (31) and the desulfurization is 0.8; Be the fresh seawater volume with desulfurization after the ratio of volume of absorption liquid be 0.8:1.
9. a kind of changeable Deuslfurizing system for sea water of ature of coal that adapts to according to claim 1 is characterized in that, described liquid re-distributor (70) is positioned under the spraying layer (32), on the entrance of absorption tower (4); Liquid re-distributor (70) comprises some blocks of two-layer interlaced arrangement; Block is oblique triangular prism shape, comprise end face (701), the first bottom surface (702), the second bottom surface (703), the first baffle plate (704) and second baffle (705), wherein end face (701) and absorption tower (4) wall oblique lower layout at 45 °, end face (701) is flat board or corrugated plating, be arranged at first bottom surface (702) of end face (701) below and the angle between the second bottom surface (703) less than 90 °, the first baffle plate (704) and second baffle (705) are vertically fixed on end face (701) both sides.
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| CN201310023177.9A CN103071369B (en) | 2013-01-22 | 2013-01-22 | Seawater desulfurization system suitable for frequency change of coal quality |
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| CN201310023177.9A CN103071369B (en) | 2013-01-22 | 2013-01-22 | Seawater desulfurization system suitable for frequency change of coal quality |
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| CN (1) | CN103071369B (en) |
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|---|---|---|---|---|
| JPH0352623A (en) * | 1989-07-21 | 1991-03-06 | Babcock Hitachi Kk | Wet type flue gas desulfurization facility utilizing sea water |
| JPH09239233A (en) * | 1996-03-05 | 1997-09-16 | Mitsubishi Heavy Ind Ltd | Method and apparatus for exhaust gas desulfurization and ship carrying the apparatus |
| US5690899A (en) * | 1995-07-29 | 1997-11-25 | Lentjes Bischoff Gmbh | Process for removing sulphur dioxide from flue gas |
| CN201353476Y (en) * | 2009-02-01 | 2009-12-02 | 中冶集团北京冶金设备研究设计总院 | Seawater flue gas desulfurization spray adsorption tower |
| CN101670235A (en) * | 2008-09-12 | 2010-03-17 | 浙江菲达环保科技股份有限公司 | Integrated seawater desulfurization washing tower |
| CN102343209A (en) * | 2011-09-28 | 2012-02-08 | 西安交通大学 | Seawater flue gas desulphurization (FGD) system applying boiler blowdown water |
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2013
- 2013-01-22 CN CN201310023177.9A patent/CN103071369B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0352623A (en) * | 1989-07-21 | 1991-03-06 | Babcock Hitachi Kk | Wet type flue gas desulfurization facility utilizing sea water |
| US5690899A (en) * | 1995-07-29 | 1997-11-25 | Lentjes Bischoff Gmbh | Process for removing sulphur dioxide from flue gas |
| JPH09239233A (en) * | 1996-03-05 | 1997-09-16 | Mitsubishi Heavy Ind Ltd | Method and apparatus for exhaust gas desulfurization and ship carrying the apparatus |
| CN101670235A (en) * | 2008-09-12 | 2010-03-17 | 浙江菲达环保科技股份有限公司 | Integrated seawater desulfurization washing tower |
| CN201353476Y (en) * | 2009-02-01 | 2009-12-02 | 中冶集团北京冶金设备研究设计总院 | Seawater flue gas desulfurization spray adsorption tower |
| CN102343209A (en) * | 2011-09-28 | 2012-02-08 | 西安交通大学 | Seawater flue gas desulphurization (FGD) system applying boiler blowdown water |
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| CN103071369B (en) | 2014-12-10 |
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