CN203002204U - Ammonia flue gas desulfurization slag removal equipment - Google Patents
Ammonia flue gas desulfurization slag removal equipment Download PDFInfo
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- CN203002204U CN203002204U CN 201220735523 CN201220735523U CN203002204U CN 203002204 U CN203002204 U CN 203002204U CN 201220735523 CN201220735523 CN 201220735523 CN 201220735523 U CN201220735523 U CN 201220735523U CN 203002204 U CN203002204 U CN 203002204U
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- flue gas
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Abstract
The utility model provides ammonia flue gas desulfurization slag removal equipment, comprising a flue gas desulfurization subsystem, an ammonium-sulfate separating subsystem and an ammonium-sulfate slag removing subsystem; the flue gas desulfurization subsystem comprises an absorption tower and a flue gas pre-dusting cooling device, wherein the flue gas pre-dusting cooling device is arranged at a flue gas inlet of the absorption tower; the ammonium-sulfate separating subsystem comprises a first-stage cyclone, a second-stage cyclone, a dewatering centrifugal machine and a fluidized drying bed which are connected in sequence; the ammonium-sulfate slag removing subsystem comprises a filtrate groove, a medicine mixing feeding box and a filter press which are connected in sequence; a size outlet of the absorption tower is connected with the first-stage cyclone, and a clear liquid outlet of the first-stage cyclone, the clear liquid outlet of the second-stage cyclone, and a liquid outlet of the dewatering centrifugal machine are connected with the filtrate groove, so that the three subsystems are integrally connected. By adopting the ammonia flue gas desulfurization slag removal equipment, the amount of ammonia loss can be decreased, so that the phenomenon of acid rain can be effectively relieved, the utilization rate of an absorbent is improved, the recovery rate of ammonium-sulfate products is increased, and the quality of the ammonium-sulfate products is improved; the ammonia flue gas desulfurization slag removal equipment is small in floor space, so that the space is saved; and the ammonia flue gas desulfurization slag removal equipment is widely suitable for being used for carrying out ammonia flue gas desulfurization slag removal for flue gases, such as flue gases in thermal power generation and sintering flue gases.
Description
Technical field
The utility model relates to the gas cleaning treatment technology of thermal power generation and steel industry, refers to particularly a kind of ammonia type flue gas desulfurizing slag removal equipment.
Background technology
In thermal power generation and steel industry, the main coal that adopts acts as a fuel, and coal dust firing also can bring serious sulfur dioxide SO when essential thermal source and electric power resource are provided
2Pollute.According to statistics, the total sulfur dioxide of the annual coal fired power plant discharging of China is up to 2,549 ten thousand tons, and the acid rain zone of causing has thus brought huge loss for China's ecological environment and industrial and agricultural production near 40% of area.Therefore, fundamentally control coal fired power plant and steel industry sulfur dioxide in sintering flue gas SO
2Discharging extremely urgent.
At present, for the desulfur technology of coal-fired flue-gas and sinter fume, mainly adopt limestone-gypsum doctor treatment, sea water desulfuration method, circulating fluid bed flue-gas desulfurizing method and wet type ammoniacal liquor doctor treatment etc.Desulfurization method of limestone-gypsum and sea water desulfuration method exist that floor space is large, system complex, the defective that energy consumption is large, operating cost is high.Although circulating fluid bed flue-gas desulfurizing method system is simple, floor space is little, operating cost is low, and is high to the quality requirement of desulfurizing agent, and the desulfuration byproduct calcium sulfite is difficult to comprehensive utilization.Wet type ammoniacal liquor doctor treatment has that floor space is little, investment and operating cost is low, desulfuration byproduct is valuable chemical raw material and the advantage such as crops chemical fertilizer.
Yet the wet type ammoniacal liquor doctor treatment phenomenon that ubiquity the escaping of ammonia rate is high on the one hand, plume is long causes the problems such as the absorbent loss is large, the ammonia utilization rate is not high, the ammonium sulfate products rate of recovery is low; Carry dust in sinter fume on the other hand more, after purifying through the head deduster, the granularity of dust of collection at large mostly is greatly 3um, and granularity is very thin, is not easy to remove clean.In the ammonia-ammonium sulfate method desulphurization system, flue dust lime-ash in the suspension that does not efflux solution, brought into by ammoniacal liquor, fresh water (FW) and the flue gas that mainly absorbed by loop slurry can not be got rid of timely, enrichment in sulphur ammonium slurries, and then affect the quality of byproduct ammonium sulfate and Systems balanth operation.Remove lime-ash and can adopt filtration or depositing technology, but because the main component of flue dust is inorganic particle, grain diameter is very little, its sedimentation time is longer, and liquid-solid boundary is not obvious, need larger sedimentation basin, and separating effect is bad.Secondly, the lime-ash fine size in the precipitation concentrate, the instructions for use that does not also reach the dehydration equipments such as plate and frame type filter-press, the precipitation concentrate can't normally dewater, and causes difficulty to subsequent treatment.
Summary of the invention
The purpose of this utility model will provide a kind of ammonia type flue gas desulfurizing slag removal equipment exactly.This equipment can reduce amount of ammonia slip take the wet ammonia process desulfurizing system as the basis, effectively alleviates the acid rain phenomenon, improves the absorbent utilization rate, increases the ammonium sulfate products rate of recovery.
For achieving the above object, the ammonia type flue gas desulfurizing slag removal equipment that the utility model is designed comprises flue gas desulfurization subsystem, sulphur ammonium isolated subsystem and sulphur ammonium slagging-off subsystem, and its special character is:
described flue gas desulfurization subsystem comprises the absorption tower, be disposed with the silk screen Despumation device from top to bottom between the top exhanst gas outlet on described absorption tower and sidewall smoke inlet, demister, water washing device and absorbent spray equipment, described adsorption tower smoke porch is provided with the pre-dedusting heat sink of flue gas, the bottom liquid storage tank on described absorption tower is connected with the input of circulation slurry pump, described loop slurry delivery side of pump is connected with the pre-dedusting heat sink of absorbent spray equipment and flue gas respectively, the bottom liquid storage tank on described absorption tower also is connected with ammoniacal liquor device for supplying and oxygen device for supplying, the slurries outlet on described absorption tower is connected with the input of sulphur ammonium slurries rear pump,
Described sulphur ammonium isolated subsystem comprises the one-level cyclone, the entrance of described one-level cyclone is connected with sulphur ammonium slurries output delivery side of pump, the slurries outlet of described one-level cyclone is connected with the entrance of second cyclone with the baffle-box pump by the eddy flow baffle-box successively, the outlet of the slurries of described second cyclone is connected with the inlet of dewatering centrifuge, and the discharging opening of described dewatering centrifuge is connected with fluidizing drying bed charging aperture by batcher;
Described sulphur ammonium slagging-off subsystem comprises filtrate receiver, the input of described filtrate receiver is connected with the purified liquor outlet of one-level cyclone, the purified liquor outlet of second cyclone and the liquid outlet of dewatering centrifuge simultaneously, the output of described filtrate receiver is connected with the inlet that mixes dosing tank by filtrate pump, the liquid outlet of described mixing dosing tank is by being connected with the input port of filter press except pulp pump, and the mud cake delivery outlet of described filter press is connected with the charging aperture of bucket.
Further, the bottom liquid storage tank on described absorption tower is outside equipped with jet pump, the input of described jet pump is connected with the bottom liquid storage tank on absorption tower, and described jet delivery side of pump is connected with the jet agitator, and described jet agitator is arranged in the bottom liquid storage tank on absorption tower.Like this, can increase the disturbance of absorbent slurry in liquid storage tank, improve the activity of absorbent slurry, ammoniacal liquor, oxygen etc. are fully mixed.
Further, the output of described ammoniacal liquor device for supplying is divided into two-way: the one tunnel is connected with the input of jet pump, and another road is connected with the output of oxygen device for supplying, and the output of described oxygen device for supplying is connected with the bottom liquid storage tank on absorption tower.Like this, can make the gasification as early as possible under the synergy of jet pump and oxygen device for supplying of liquid ammonia water, with the violent disturbance of absorbent slurry generation gas-liquid two-phase, reach well-mixed effect.
Further, the pre-dedusting heat sink of described flue gas is equipped with the fresh water (FW) device for supplying, the output of described fresh water (FW) device for supplying is connected with the spray head of the pre-dedusting heat sink of flue gas, and the delivery port of the pre-dedusting heat sink of described flue gas is connected with the input of filtrate receiver.Like this, fresh water (FW) enters filtrate receiver after flue gas is carried out pre-dedusting cooling, re-uses after treatment.
Further, be provided with booster fan between the pre-dedusting heat sink of described flue gas and smoke conveying duct.Like this, can effectively overcome flue gas resistance, accelerate the flue gas desulfurization process, improve smoke desulfurization efficiency.
Further, the output of described filtrate receiver also is connected with the liquid mouth that returns on absorption tower by filtrate pump, like this, can utilization process water, saving water resource.
Further, the clear liquid delivery outlet of described filter press is connected with the input of filtrate receiver.Like this, be also utilization process water, saving water resource.
Further, described filter press is folded spiral shell formula filter press.Like this, can improve the separating effect of mud and clear liquid.
The utility model has the advantage of: utilize the synergistic combination of silk screen Despumation device in the absorption tower, demister, water washing device and absorbent spray equipment, can reduce the escaping of ammonia rate, and solve in plume sulfur dioxide with the problem of fume emission.Adopt the mode that dosing is concentrated, dewater, can solve the too high problem that sulphur ammonium quality is impacted of cinder content in desulfurizer.For traditional spray column, effectively removed the droplet particle that carries in the flue gas, greatly reduced the rainy phenomenon of chimney.And, by the integrated function of the sludge concentration and dewatering of filter press self, cancelled the clarification concentration basin on the traditional approach, reduced floor space, conserve space.Simultaneously, the utility model ammonia utilization rate is high, sulphur ammonium output is high, quality better, can generally be applicable to the ammonia type flue gas desulfurizings such as thermal power generation, sinter fume.
Description of drawings
Accompanying drawing is a kind of structural representation of ammonia type flue gas desulfurizing slag removal equipment.
in figure: smoke conveying duct 1, booster fan 2, the pre-dedusting heat sink 3 of flue gas, absorption tower 4, absorbent spray equipment 5, water washing device 6, demister 7, silk screen Despumation device 8, circulation slurry pump 9, oxygen device for supplying 10, sulphur ammonium slurries rear pump 11, jet pump 12, ammoniacal liquor device for supplying 13, one-level cyclone 14, eddy flow baffle-box 15, baffle-box pump 16, second cyclone 17, dewatering centrifuge 18, batcher 19, fluidizing drying bed 20, filtrate receiver 21, filtrate pump 22, mix dosing tank 23, except pulp pump 24, filter press 25, fresh water (FW) device for supplying 26, jet agitator 27, bucket 28.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Ammonia type flue gas desulfurizing slag removal equipment shown in figure is mainly formed by flue gas desulfurization subsystem, sulphur ammonium isolated subsystem and the combination of sulphur ammonium slagging-off subsystem.
The flue gas desulfurization subsystem has absorption tower 4, be disposed with silk screen Despumation device 8, demister 7, water washing device 6 and absorbent spray equipment 5 between the top exhanst gas outlet on absorption tower 4 and sidewall smoke inlet from top to bottom, be disposed with booster fan 2, the pre-dedusting heat sink 3 of flue gas between smoke conveying duct 1 and absorption tower 4 smoke inlets, the pre-dedusting heat sink 3 of flue gas is equipped with fresh water (FW) device for supplying 26, and its output is connected with the spray head of the pre-dedusting heat sink 3 of flue gas.The bottom liquid storage tank on absorption tower 4 is connected with the input of circulation slurry pump 9, the output of circulation slurry pump 9 is connected with the pre-dedusting heat sink 3 of absorbent spray equipment 5 and flue gas respectively, be provided with jet agitator 27 in the bottom liquid storage tank on absorption tower 4, the bottom liquid storage tank on absorption tower 4 is outside equipped with jet pump 12, the input of jet pump 12 is connected with the liquid storage tank on absorption tower 4, and the output of jet pump 12 is connected with jet agitator 27.The bottom liquid storage tank on absorption tower 4 also is connected with ammoniacal liquor device for supplying 13 and oxygen device for supplying 10, the output of ammoniacal liquor device for supplying 13 is divided into two-way: the one tunnel is connected with the input of jet pump 12, another road is connected with the output of oxygen device for supplying 10, and the output of oxygen device for supplying 10 is connected with the bottom liquid storage tank on absorption tower 4.The slurries outlet on absorption tower 4 is connected with the input of sulphur ammonium slurries rear pump 11.
Sulphur ammonium isolated subsystem has one-level cyclone 14, the entrance of one-level cyclone 14 is connected with the output of sulphur ammonium slurries rear pump 11, the slurries outlet of one-level cyclone 14 is connected with the entrance of baffle-box pump 16 with second cyclone 17 by eddy flow baffle-box 15 successively, the outlet of the slurries of second cyclone 17 is connected with the inlet of dewatering centrifuge 18, and the discharging opening of dewatering centrifuge 18 passes through batcher 19 and is connected with fluidizing drying bed 20 charging aperture.
sulphur ammonium slagging-off subsystem has filtrate receiver 21, the input while of filtrate receiver 21 and the delivery port of the pre-dedusting heat sink 3 of flue gas, the purified liquor outlet of one-level cyclone 14, the purified liquor outlet of second cyclone 17 is connected with the liquid outlet of dewatering centrifuge 18, the output of filtrate receiver 21 is connected with the input of filtrate pump 22, the output of filtrate pump 22 is divided into two-way: the one tunnel is connected with the liquid mouth that returns on absorption tower 4, another road is connected with the inlet that mixes dosing tank 23, mix the liquid outlet of dosing tank 23 by being connected with the input port of filter press 25 except pulp pump 24, the clear liquid delivery outlet of filter press 25 is connected with the input of filtrate receiver 21, the mud cake delivery outlet of filter press 25 is connected with the charging aperture of bucket 28.Filter press 25 is folded spiral shell formula filter press, and the mud cake of separating enters bucket 28 and stores in short-term.
The operation principle of native system is such: flue gas from smoke conveying duct 1 after booster fan 2 boosts, enter in the pre-dedusting heat sink 3 of flue gas, after the pre-dedusting cooling of absorbent slurry, enter absorption tower 4, the slurries counter current contacting reaction with absorbent spray equipment 5 sprays removes the sulfur dioxide in flue gas, first reduce the droplet concentration of carrying secretly through water washing device 6, then through the preliminary demist of demister 7, then enter the further demist of silk screen Despumation device 8 and process, enter at last chimney.
The ammoniacal liquor of ammoniacal liquor device for supplying 13 outputs is divided into two-way: the one tunnel successively by entering the bottom liquid storage tank on absorption tower 4 after jet pump 12, the abundant mixing of jet agitator 27, after mixing, the oxygen of another road and oxygen device for supplying 10 outputs or air enter the bottom liquid storage tank on absorption tower 4, slurries in liquid storage tank are delivered to absorbent spray equipment 5 by circulation slurry pump 9, contact with flue gas adverse current, absorb sulfur dioxide wherein; The part slurries are delivered to Flue Gas Pretreatment Device 3, and the fresh water (FW) that Flue Gas Pretreatment Device 3 according to circumstances also can select recruitment skill water device for supplying 26 to carry carries out the dedusting cooling.
The 4 bottom liquid storage tank oxidations on the absorption tower after sulfur dioxide in flue gas is absorbed by sprayed slurry form sulphur ammonium crystalloid solution.Squeeze into one-level cyclone 14 by sulphur ammonium slurries rear pump 11 and carry out initial gross separation, the isolated upper clear supernate of one-level cyclone 14 is introduced filtrate receiver 21, the bottom underflow is squeezed into second cyclone 17 by eddy flow baffle-box 15 and baffle-box pump 16 successively and is further separated, the isolated upper clear supernate of second cyclone 17 is got back to filtrate receiver 21, the bottom underflow is introduced dewatering centrifuge 18, underflow after dehydration enters fluidizing drying bed 20 through batcher 19, form after drying qualified products sulphur ammonium, stock after the packing piling.A slurries part in filtrate receiver 21 is sent back in absorption tower 4 recycling by filtrate pump 22, another part is squeezed into by filtrate pump 22 and is mixed dosing tank 23, again through deliver to folded spiral shell formula filter press 25 except pulp pump 24, the clear liquid that is press-filtered out returns to filtrate receiver 21, and the mud cake of separating is delivered to bucket 28 and stores.
Claims (8)
1. an ammonia type flue gas desulfurizing slag removal equipment, comprise flue gas desulfurization subsystem, sulphur ammonium isolated subsystem and sulphur ammonium slagging-off subsystem, it is characterized in that:
described flue gas desulfurization subsystem comprises absorption tower (4), be disposed with silk screen Despumation device (8) between the top exhanst gas outlet on described absorption tower (4) and sidewall smoke inlet from top to bottom, demister (7), water washing device (6) and absorbent spray equipment (5), smoke inlet place, described absorption tower (4) is provided with the pre-dedusting heat sink of flue gas (3), the bottom liquid storage tank on described absorption tower (4) is connected with the input of circulation slurry pump (9), the output of described circulation slurry pump (9) is connected with the pre-dedusting heat sink of absorbent spray equipment (5) and flue gas (3) respectively, the bottom liquid storage tank on described absorption tower (4) also is connected with ammoniacal liquor device for supplying (13) and oxygen device for supplying (10), the slurries outlet on described absorption tower (4) is connected with the input of sulphur ammonium slurries rear pumps (11),
Described sulphur ammonium isolated subsystem comprises one-level cyclone (14), the entrance of described one-level cyclone (14) is connected with the output of sulphur ammonium slurries rear pumps (11), the slurries outlet of described one-level cyclone (14) is connected with the entrance of baffle-box pump (16) with second cyclone (17) by eddy flow baffle-box (15) successively, the slurries outlet of described second cyclone (17) is connected with the inlet of dewatering centrifuge (18), and the discharging opening of described dewatering centrifuge (18) is connected with the charging aperture of fluidizing drying bed (20) by batcher (19);
described sulphur ammonium slagging-off subsystem comprises filtrate receiver (21), the input while of described filtrate receiver (21) and the purified liquor outlet of one-level cyclone (14), the purified liquor outlet of second cyclone (17) is connected with the liquid outlet of dewatering centrifuge (18), the output of described filtrate receiver (21) is connected with the inlet that mixes dosing tank (23) by filtrate pump (22), the liquid outlet of described mixing dosing tank (23) is by being connected with the input port of filter press (25) except pulp pump (24), the mud cake delivery outlet of described filter press (25) is connected with the charging aperture of bucket (28).
2. ammonia type flue gas desulfurizing slag removal equipment according to claim 1, it is characterized in that: the bottom liquid storage tank of described absorption tower (4) is outside equipped with jet pump (12), the input of described jet pump (12) is connected with the bottom liquid storage tank of absorption tower (4), the output of described jet pump (12) is connected with jet agitator (27), and described jet agitator (27) is arranged in the bottom liquid storage tank on absorption tower (4).
3. ammonia type flue gas desulfurizing slag removal equipment according to claim 2, it is characterized in that: the output of described ammoniacal liquor device for supplying (13) is divided into two-way: the one tunnel is connected with the input of jet pump (12), another road is connected with the output of oxygen device for supplying (10), and the output of described oxygen device for supplying (10) is connected with the bottom liquid storage tank of absorption tower (4).
4. according to claim 1 and 2 or 3 described ammonia type flue gas desulfurizing slag removal equipments, it is characterized in that: the pre-dedusting heat sink of described flue gas (3) is equipped with fresh water (FW) device for supplying (26), the output of described fresh water (FW) device for supplying (26) is connected with the spray head of the pre-dedusting heat sink of flue gas (3), and the delivery port of the pre-dedusting heat sink of described flue gas (3) is connected with the input of filtrate receiver (21).
5. according to claim 1 and 2 or 3 described ammonia type flue gas desulfurizing slag removal equipments, is characterized in that: be provided with booster fan (2) between the pre-dedusting heat sink of described flue gas (3) and smoke conveying duct (1).
6. according to claim 1 and 2 or 3 described ammonia type flue gas desulfurizing slag removal equipments, it is characterized in that: the output of described filtrate receiver (21) also is connected with the liquid mouth that returns of absorption tower (4) by filtrate pump (22).
7. according to claim 1 and 2 or 3 described ammonia type flue gas desulfurizing slag removal equipments, it is characterized in that: the clear liquid delivery outlet of described filter press (25) is connected with the input of filtrate receiver (21).
8. according to claim 1 and 2 or 3 described ammonia type flue gas desulfurizing slag removal equipments is characterized in that: described filter press (25) is folded spiral shell formula filter press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201220735523 CN203002204U (en) | 2012-12-28 | 2012-12-28 | Ammonia flue gas desulfurization slag removal equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220735523 CN203002204U (en) | 2012-12-28 | 2012-12-28 | Ammonia flue gas desulfurization slag removal equipment |
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| CN203002204U true CN203002204U (en) | 2013-06-19 |
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| CN 201220735523 Expired - Fee Related CN203002204U (en) | 2012-12-28 | 2012-12-28 | Ammonia flue gas desulfurization slag removal equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989306A (en) * | 2012-12-28 | 2013-03-27 | 武汉钢铁(集团)公司 | Flue gas ammonia desulfurization and deslagging system |
| CN103496717A (en) * | 2013-09-23 | 2014-01-08 | 武汉都市环保工程技术股份有限公司 | Sequencing batch ammonium sulfate solution oxidation and sulfur scum removal method |
-
2012
- 2012-12-28 CN CN 201220735523 patent/CN203002204U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989306A (en) * | 2012-12-28 | 2013-03-27 | 武汉钢铁(集团)公司 | Flue gas ammonia desulfurization and deslagging system |
| CN102989306B (en) * | 2012-12-28 | 2015-01-21 | 武汉钢铁(集团)公司 | Flue gas ammonia desulfurization and deslagging system |
| CN103496717A (en) * | 2013-09-23 | 2014-01-08 | 武汉都市环保工程技术股份有限公司 | Sequencing batch ammonium sulfate solution oxidation and sulfur scum removal method |
| CN103496717B (en) * | 2013-09-23 | 2014-12-17 | 武汉都市环保工程技术股份有限公司 | Sequencing batch ammonium sulfate solution oxidation and sulfur scum removal method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20171228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |