CN101700464A - Exhausted smoke processing system - Google Patents
Exhausted smoke processing system Download PDFInfo
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- CN101700464A CN101700464A CN200910199057A CN200910199057A CN101700464A CN 101700464 A CN101700464 A CN 101700464A CN 200910199057 A CN200910199057 A CN 200910199057A CN 200910199057 A CN200910199057 A CN 200910199057A CN 101700464 A CN101700464 A CN 101700464A
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Abstract
The invention relates to an exhausted smoke processing system, comprising a purifying tower, a washing circulating tank and a grain growing tank. The lower part of the purifying tower is provided with an oxidizing pond, the middle part is provided with a washing section, and the upper part is provided with an absorbing section; the oxidizing pond is filled with absorbing liquid; the washing circulating tank is filled with washing solution; and the grain growing tank is filled with ammonium sulfate slurry. The concentration of the ammonium sulfate in the absorbing liquid is 5-45 percent, the content of the solid ammonium sulfate in the washing solution is 3-10 percent, and the content of the solid ammonium sulfate in the ammonium sulfate slurry is 12-30 percent. The purifying tower is a combined tower integrating the absorbing function, the washing function and the oxidizing function which are respectively fulfilled in the respective region. Particularly, because the strong-acid gas is washed and purified in the washing section, the strong-acid gas which can generate strong-acid ammonium salt aerosol easily can be well prevented from entering the absorbing section with ammonia, and furthermore, the generation of the ammonium salt aerosol can be fully prevented, and the escape of the ammonia can be effectively controlled, thus the whole purifying and processing system can be operated and controlled more safely and reliably.
Description
Technical field
The present invention relates to a kind of exhausted smoke processing system, relating in particular to ammonia is that raw material reclaims the cleaning treatment system that oxysulfide is produced thiamine fertilizer from flue gas, belongs to electric power, metallurgy, environmental protection and chemical technology field.
Background technology
The acidic gaseous harmful substance that contains in the flue gas, SO especially wherein
2It is the main source that forms acid rain.As everyone knows, a kind of way that solves the acid rain pollution is discharged fume exactly and is handled or purify.Employing ammonia is raw material, and purified product is an ammonium sulfate, is the very high chemical fertilizer of a kind of fertilizer efficiency, and its unit nitrogenous fertilizer is imitated and is higher than urea, and element sulphur wherein also is the nutrient of crop growth necessity.
But a practical challenges that faces jointly of existing systems or method is exactly an aerosol.Aerosol is that the particle diameter that exists in the flue gas is less than 1 micron, even less than 0.1 micron, the ultrafine dust that is called sub-micron, its total concentration in flue gas may be very low, but it can cause the plume of smoke evacuation dense, and hangover is very long, even beyond several kilometers, had a strong impact on the visual appearance of smoke evacuation, severe patient has caused new secondary pollution.If do not address this problem well, the popularization of the practical application of such technology will be limited to a great extent.
Aerosol comprises the weak acid and weak base ammonium salt, refers in particular to ammonium bisulfite, and highly acid ammonium salt, such as sulfur trioxide in the flue gas, and the result that hydrogen chloride, hydrogen fluoride and nitrogen dioxide etc. and ammonia react in gas phase.Be not resolvent under the strong acid weak base salt general condition.At present, the aerosol in this type of purification process mainly is this class highly acid aerosol, and almost not at such aerocolloidal way, even the faintly acid aerosol, most technology all are easy in actual applications occur and are difficult to solve.
Summary of the invention
The technical issues that need to address of the present invention are to disclose a kind of novel exhausted smoke processing system, to solve serious faintly acid and the highly acid aerosol problem that exists in the prior art, can also guarantee simultaneously more effectively to control the escape loss and the higher ammonia raw material availability of ammonia.
For achieving the above object, the present invention has also designed a kind of exhausted smoke processing system, and described exhausted smoke processing system comprises purifying column, cycles of washing groove and growing the grain groove, the purifying column bottom is the oxidation pond that includes the air bubbler, the middle part is for including the washing section of wash spray device, and top is to include the absorber portion that absorbs spray thrower, and, described oxidation pond is loaded with absorption liquid, the cycles of washing groove is loaded with cleaning solution, and the growing the grain groove is loaded with the sulphur ammonium slurries that include ammonium sulfate solids, also comprises:
By absorbing the absorbent recirculation pump that pipeloop exports with the absorption liquid of described purifying column bottom oxidation pond and the absorption liquid import of top absorber portion is connected, circulation in order to absorption liquid is carried, make that oxidation pond also is to absorb circulating slot, outside the absorber portion of described purifying column and the tower body between the oxidation pond, also be provided with the reflux pipeline of described absorption liquid, constitute one and absorb closed circuit, and absorbent recirculation pump has 2 at least;
The cleaning circulation pump that the cleaning solution import of washing section is connected in the middle part of cleaning solution outlet by cycles of washing pipeline and described cycles of washing groove and the purifying column, circulation in order to cleaning solution is carried, and the cleaning solution reflux pipeline that is communicated with the cleaning solution import of described purifying column cleaning solution outlet and cycles of washing groove, constituted a cycles of washing loop, and cleaning circulation pump have 2 at least;
The absorption liquid rear pump that is connected with the absorption liquid delivery outlet and the washing section absorption liquid input port, middle part of described purifying column bottom oxidation pond by the absorption liquid transfer line, constantly replenishing of the cleaning solution of realization cycles of washing loop or cycles of washing groove, promptly ammonium sulfate solution is by the conveying of oxidation pond to washing section;
One-level cyclone that is connected with described growing the grain groove by the cleaning solution export pipeline and the cleaning solution delivery pump that is connected with the cleaning solution delivery outlet and the described one-level cyclone cleaning solution input port of described cycles of washing groove;
Be communicated with the sulphur ammonium slurries rear pump of described growing the grain groove and the second cyclone that is connected with sulphur ammonium slush pump by sulphur ammonium slurries export pipeline, and also comprise;
The liquid-solid separation equipment that is connected with second cyclone, drying equipment that is connected with described liquid-solid separation equipment and the packaging facilities that is connected with described drier;
It is characterized in that, described absorption liquid is the aqueous solution that does not contain the ammonium sulfate of ammonium sulfate solids or crystal, its sulphur ammonium concentration is 5～45%, less than the saturated concentration under the respective conditions is solubility, described cleaning solution is the ammonium sulfate solution that contains ammonium sulfate solids, its sulphur ammonium concentration is 46～55%, wherein sulphur ammonium solids content is 3～10%, described sulphur ammonium slurries also are the ammonium sulfate solutions that contains ammonium sulfate solids, its sulphur ammonium concentration is 55～65%, but its sulphur ammonium solids content is 12～30%, and is 1.5～3.5 times of sulphur ammonium solids content of cleaning solution.
Like this, purifying column is that a collection absorbs, washing/concentrate and be oxidized to the combined type tower equipment of one, and each function is independently finished in zone separately; Especially make washing and the purification of in washing section, mainly finishing flue gas middle strong acidity gas, stop the aerocolloidal highly acid gas of easy generation highly acid ammonium salt to enter into the absorber portion of ammonia well, thereby can avoid aerocolloidal generation more up hill and dale; And washing section also has the function that promotes the ammonium sulfate solution evaporation and concentration, the cycles of washing groove also has the function that promotes ammonium sulfate crystallization, the growing the grain groove then is the function that promotes that ammonia sulfate crystal is grown up, and form naturally by the clear or rare ammonium sulfate solution that does not contain crystalline solid, to only containing the mixed solution of discussing ammonium sulfate solids, or title dilute slurry, again to the ammonium sulfate of a plurality of concentration gradients of the underflow liquid that contains the higher crystalline body burden, feasible absorption recycles the not clear ammonium sulfate solution of sulfur acid crystalline ammonium body, reduced scabbing and blockage problem of absorber portion and oxidation pond to greatest extent, for guaranteeing that high absorption or desulfuration efficiency provide condition, even in cycles of washing, also only used the low dilute slurry of sulfur-bearing crystalline ammonium bulk concentration, the control and the operation stability that help whole device, can accomplish the optimization that designs, reduce investment outlay and energy consumption.
And, in the exhausted smoke processing system of the present invention, the clear liquid reflux pipeline of described one-level cyclone is communicated with described sink, and the clear liquid reflux pipeline of described second cyclone is communicated with described sink, and the mother liquor reflux pipeline of described centrifuge is communicated with described sink.Like this, can keep the significant difference of the sulphur ammonium solids content of growing the grain pond and cycles of washing groove well, sulphur crystalline ammonium body is stably grown up in the growing the grain groove, it is better to make the growing the grain tank culture go out crystal morphology, the ammonia sulfate crystal that granularity is bigger, to improve its product quality, be the last better products selling price that obtains.
Further, above the wash spray device of described washing section setting, also be provided with the washing demister, and above described washing demister, be provided with the rinse spray device that is connected with described absorption liquid rear pump.Like this, also be difference, enlarge the difference of both concentration as far as possible, reduce ammonium sulfate concentrations in the oxidation pond for the sulphur ammonium concentration of keeping oxidation pond and cycles of washing groove further, help promoting the oxidation of ammonium sulfite in oxidation pond, and obtain cleaner purification flue gas.
Further, in the exhausted smoke processing system of the present invention, the exhanst gas outlet of described purifying column directly is connected with in line chimney, and the height of in line chimney is between 30～100m.Like this, purify flue gas and can avoid anticorrosion requirement, reduce investment outlay, reduce the duration without former chimney (domestic former chimney mainly is to mix clay structure) discharging to former chimney.
Also have, described absorber portion and washing section are separated by demarcation strip, have flue gas communication port and absorption liquid communication port on the described demarcation strip, described flue gas communication port upwards is connected with and rises gas cap, described absorption liquid communication port is connected with downspout downwards, described washing section and oxidation pond are separated by demarcation strip, have the flow of liquor port on the described demarcation strip, and described flow of liquor port is connected with downspout downwards.Like this, can reduce absorption liquid to greatest extent, especially cleaning solution is in the accumulation of corresponding region, the dead band occurs and causes scabbing and occluding device.
Further, described oxidation pond is provided with the adapter of adding raw material ammonia, also is provided with the adapter of adding raw material ammonia on the described growing the grain groove, and described oxidation pond or absorber portion are provided with the adapter of adding water.Like this, can neutralize respectively and absorb highly acid sulfur trioxide owing to purifying column absorbs weak acid and the scrubbing tower that weakly acidic sulfur dioxide forms, the strong acid that hydrogen chloride and nitrogen dioxide etc. form, control corrosivity, and purification efficiency can also be controlled the quality and the speed of crystal growth.
Further, further, in the exhausted smoke processing system of the present invention, described drying equipment comprises roller, oscillatory type or fixed gas-solid fluidized drier, and described liquid-solid separation equipment comprises vacuum belt formula dewaterer or centrifugal drier.Like this, can adapt to sulphur crystalline ammonium body and change relatively more responsive situation, guarantee the stability of moving and controlling with flue gas condition.
Especially, the member of described connection comprises pipeline, be connected being used on the pipeline to control the instrument of valve and indication flow, the pressure and temperature of flow, and fixing used flange, screw, pad and expansion joint etc. of aforementioned components.
Operation principle of the present invention is such:
Contain highly acid sulfur trioxide, hydrogen chloride and nitrogen dioxide, with faintly acid sulfur dioxide and dirt, and the higher former flue gas of temperature at first enters washing section, contact with the cleaning solution that sprays in the washing section, lowered the temperature by chilling, and dirt and highly acid gas are washed and become the washing flue gas, enter absorber portion again.The washing flue gas that enters absorber portion contacts with absorption liquid, absorbs weakly acidic sulfur dioxide, becomes the purification flue gas.
In washing section, flue gas passes through flue gas distributor successively, wash spray device and washing demister; In absorber portion, flue gas is successively by absorbing spray thrower and absorbing demister.
In absorber portion, circulating absorption solution is an ammonium sulfate solution, and its concentration is less than 40%, greater than 5%, and is lower than ammonium sulfate solubility under the corresponding temperature condition, is stored in the oxidation pond.Circulating absorption solution is transported to absorber portion through absorbent recirculation pump from oxidation pond, spray into atomized drop by absorbing spray thrower, fully contact with flue gas, chemical absorbing takes place, absorb weakly acidic sulfur dioxide, become ammonium sulfite, enter absorption liquid, after collecting on the demarcation strip of separating absorber portion and washing section, outlet of process absorption liquid and the downspout that is attached thereto, and subsequent absorption liquid reflux pipeline fall back to oxidation pond, the air oxidation that disperses through bubbler that is blasted is an ammonium sulfate, thereby forms ammonium sulfate solution.Simultaneously, raw material ammonia adds from oxidation pond, regulates the pH value of ammonium sulfate solution in the oxidation pond, and generally between 5.3～6.3, water can also can add from any position of oxidation pond from absorber portion, and the control liquid level is kept water balance.In absorber portion, sulfur dioxide deviate from or purification efficiency greater than 90%, preferably greater than 95%, better can be greater than 99%; In oxidation pond, the oxidation efficiency of ammonium sulfite is greater than 95%, preferably greater than 99%.
In washing section, cleaning solution is the ammonium sulfate dilute slurry, and its solid ammonium sulfate content is stored in the cycles of washing groove less than 10%.Cleaning solution is transported to washing section through cleaning circulation pump from the cycles of washing groove, spray atomizing by the wash spray device, fully contact with flue gas, take place to conduct heat and mass transport process, absorb flue gas highly acid gas, comprise sulfur trioxide, hydrogen chloride and nitrogen dioxide, absorption liquid become highly acid liquid, and pH is controlled at less than 4.5, generally between 1.0～4.0, be preferably between 3.0～4.0.Be stored in the clear ammonium sulfate solution in the oxidation pond simultaneously, or claim to be transported to the washing demister through the absorption liquid rear pump by absorption liquid,,, keep the liquid level of cycles of washing groove Yi Bian replenish the moisture content of washing section evaporation on one side wash demister by spray thrower wherein.In washing section, the washing, purifying efficient of highly acid material is greater than 99%, preferably greater than 99.9%.
Extracting the ammonium sulfate dilute slurry from the cycles of washing groove is cleaning solution, after process one-level cyclone concentrates, obtain ammonium sulfate solids concentration greater than 12%, be preferably in 20～30% ammonium sulfate underflow liquid, be called sulphur ammonium slurries, be stored in the growing the grain groove, allow the ammonia sulfate crystal continued growth, improve the quality, further sulphur ammonium solids-enriched is arrived greater than 30% by second cyclone again, 35～50%, directly enter follow-up solid-liquid separating equipment and extract ammonium sulfate solids preferably, the ammonium sulfate solids that obtains is called wet ammonium sulfate, its water content is less than 10%, less than 5%,, then enter drying equipment preferably best less than 3%, obtain dried ammonium sulfate, its water content is less than 1%, preferably less than 0.5%, preferably less than 0.2%.
From the one-level cyclone, clear liquid or mother liquor that second cyclone and solid-liquid separating equipment reflux are all got back to the cycles of washing groove, further concentrate so that obtain.
Process from above whole invention, compare with the prior art scheme, adopt the beneficial effect of exhausted smoke processing system of the present invention to be, two main processes that take place in the flue gas, be highly acid GAS ABSORPTION in the flue gas and effective decoupling zero of faintly acid GAS ABSORPTION, promptly determine aerosol to form and two processes of the escaping of ammonia have also showed effective decoupling zero, made two difficult problems that exist in the conventional art be able to respectively and solution efficiently; In addition, three main processes that take place in the liquid phase promptly concentrate, oxidation and crystallization also be able to full decoupledly, makes oxidation more effective, and crystalline quality is also more reliable; And the operation of whole cleaning system and operation control are also with safer and reliable.
Description of drawings
Fig. 1 is the exhausted smoke processing system schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing exhausted smoke processing system of the present invention is described in further detail.
Referring to accompanying drawing 1, a kind of exhausted smoke processing system comprises purifying column 5, cycles of washing groove 6 and growing the grain groove 3, described purifying column bottom is an oxidation pond 501, the middle part is a washing section 502, and top is absorber portion 503, and, described oxidation pond 501 is loaded with absorption liquid 51, described cycles of washing groove 6 is loaded with cleaning solution 61, and described growing the grain groove 3 is loaded with sulphur ammonium slurries 31, also comprises:
By absorbing the absorbent recirculation pump 16 that pipeloop exports with the absorption liquid of described purifying column 5 bottom oxidation ponds 501 and the absorption liquid import of top absorber portion 503 is connected;
The cleaning circulation pump 8 that the cleaning solution outlet by cycles of washing pipeline 15 and described cycles of washing groove 6 and the cleaning solution import of purifying column 5 middle part washing sections 502 are connected, and be communicated with that described purifying column 5 cleaning solutions export and the cleaning solution reflux pipeline 14 of described cycles of washing groove 6 cleaning solution imports;
The absorption liquid rear pump 9 that is connected with the absorption liquid delivery outlet and the middle part washing section 502 absorption liquid input ports of described purifying column 5 bottom oxidation ponds 501 by the absorption liquid transfer line;
One-level cyclone 4 that is connected with described growing the grain groove 3 by the cleaning solution export pipeline and the cleaning solution delivery pump 7 that is connected with the cleaning solution delivery outlet and the described one-level cyclone 4 cleaning solution input ports of described cycles of washing groove 3;
Be communicated with the sulphur ammonium slurries rear pump 18 of described growing the grain groove 3 and the second cyclone 19 that is connected with sulphur ammonium slush pump 18 by sulphur ammonium slurries export pipeline, and also comprise;
The liquid-solid separation equipment 21 that is connected with second cyclone, drying equipment 22 that is connected with described liquid-solid separation equipment 21 and the packaging facilities 23 that is connected with described drier 22;
And the sulphur ammonium concentration of described absorption liquid 51 is 15%, and the sulphur ammonium concentration of described cleaning solution 61 is 50%, and solids content is 5%, and described sulphur ammonium slurries 31 sulphur ammonium concentrations are 60%, and sulphur ammonium solids content is 15%.
Further, aforesaid exhausted smoke processing system, between described absorber portion 503 and described oxidation pond 501, also be provided with described absorption liquid 51 reflux pipelines 17, the clear liquid pipeline 27 of described one-level cyclone 4 is communicated with described sink 6, the clear liquid pipeline 25 of described/second cyclone 19 is communicated with described sink 6, and the mother liquor pipeline 26 of described centrifuge 21 is communicated with described sink 6;
Described washing section 502 is provided with wash spray device 52, above described wash spray device 52, also be provided with washing demister 53, and above described washing demister 53, be provided with the rinse spray device that is connected with described absorption liquid rear pump 9, described cleaning circulation pump 8 has 2, described absorbent recirculation pump 16 also has 2, described drying equipment 22 is the gas-solid fluidized drier of roller, and described liquid-solid separation equipment 21 is a vacuum belt formula dewaterer.
Also have, aforesaid exhausted smoke processing system, described absorber portion 503 and washing section 502 are separated by demarcation strip 57, have flue gas communication port and absorption liquid communication port on the described demarcation strip 57, described flue gas communication port upwards is connected with and rises gas cap 571, and described absorption liquid communication port is connected with downspout 572 downwards, and described washing section 502 and oxidation pond 501 are separated by demarcation strip 56, have the flow of liquor port on the described demarcation strip 56, described flow of liquor port is connected with downspout 562 downwards;
Described growing the grain groove 3 and oxidation pond 501 are provided with the adapter of adding raw material ammonia 2, and described absorber portion 503 is provided with the adapter of adding water 1.
Further, aforesaid exhausted smoke processing system, the exhanst gas outlet of described purifying column 5 are connected with in line chimney 28, and described in line chimney height is 60 meters.
The course of work of above-mentioned exhausted smoke processing system is as follows:
Contain highly acid sulfur trioxide, hydrogen chloride and nitrogen dioxide, with faintly acid sulfur dioxide and dirt, and the higher former flue gas 10 of temperature at first enters washing section 502, with spray thrower in the washing section 502 52 spray cleaning solution 61 contact, lowered the temperature by chilling, and dirt and highly acid gas are washed and become washing flue gas 20, enter absorber portion 503 again.The washing flue gas 20 that enters absorber portion 503 contacts with absorption liquid 51, absorbs weakly acidic sulfur dioxide, becomes to purify flue gas 30.
In washing section 502, flue gas 20 passes through flue gas distributor successively, wash spray device 52 and washing demister 53; In absorber portion 503, flue gas is successively by absorbing spray thrower 58 and absorbing demister 54.
In absorber portion 503, circulating absorption solution 51 is ammonium sulfate solutions, and its concentration is 15%, is lower than the ammonium sulfate solubility under the corresponding temperature condition, is stored in the oxidation pond 501.Circulating absorption solution 51 is transported to absorber portion 502 through absorbent recirculation pump 16 from oxidation pond 501, spray into atomized drop by absorbing spray thrower 58, fully contact with flue gas 20, chemical absorbing takes place, absorb weakly acidic sulfur dioxide, become ammonium sulfite, enter absorption liquid 51, after collecting on the demarcation strip 57 of separating absorber portion 503 and washing section 501, outlet of process absorption liquid and the downspout 59 that is attached thereto, and subsequent absorption liquid reflux pipeline 17 fall back to oxidation pond 501, the air 13 that disperses through bubbler 55 that is blasted is oxidized to ammonium sulfate, thereby forms ammonium sulfate solution.Simultaneously, raw material ammonia 2 adds from oxidation pond 501, regulates the pH value of ammonium sulfate solution in the oxidation pond 501, and 5.5, water 1 adds from oxidation pond 501, and the control liquid level is kept water balance.In absorber portion 503, the deviating from or purification efficiency 96.5% of sulfur dioxide; In oxidation pond 501, the oxidation efficiency 98.8% of ammonium sulfite.
In washing section 502, cleaning solution 61 is ammonium sulfate dilute slurries, and its solid ammonium sulfate content 5% is stored in the cycles of washing groove 6.Cleaning solution 61 is transported to washing section 502 through cleaning circulation pump 8 from cycles of washing groove 6, spray atomizing by wash spray device 52, fully contact with flue gas 10, take place to conduct heat and mass transport process, absorb flue gas highly acid gas, comprise sulfur trioxide, hydrogen chloride and nitrogen dioxide, absorption liquid becomes highly acid liquid, and pH is controlled at 3.0.Be stored in the clear ammonium sulfate solution in the oxidation pond 501 simultaneously, or claim to be transported to washing demister 53 through absorption liquid rear pump 9, on one side wash demister 53 by absorption liquid 51 by spray thrower wherein, replenish the moisture content of washing section evaporation on one side, keep the liquid level of cycles of washing groove 6.In washing section 502, the washing, purifying efficient 99.5% of highly acid material.
Extracting the ammonium sulfate dilute slurry from cycles of washing groove 6 is cleaning solution 61, after process one-level cyclone 4 concentrates, obtain the ammonium sulfate underflow liquid of ammonium sulfate solids concentration 15%, be called sulphur ammonium slurries 31, be stored in the growing the grain groove 3, allow the ammonia sulfate crystal continued growth, improve the quality, pass through second cyclone 19 more further with sulphur ammonium solids-enriched to 35%, directly enter follow-up solid-liquid separating equipment 21 and extract ammonium sulfate solids, the ammonium sulfate solids that obtains is called wet ammonium sulfate, its water content 5%, then enter drying equipment 2, obtain dried ammonium sulfate 24, its water content 0.3%.From one-level cyclone 4, clear liquid or mother liquor that second cyclone 19 and solid-liquid separating equipment 21 reflux are all got back to cycles of washing groove 6, further concentrate so that obtain.
Aforesaid device, the amount of ammonia slip 1.5mg/Nm in its cleaning of off-gas 30
3, content of sulfur dioxide is 58mg/Nm
3, not seeing has obvious aerosol phenomenon, and plume flies away promptly basic disappearance the about length 40m, and effect is fairly obvious.
Claims (10)
1. exhausted smoke processing system, comprise purifying column (5), cycles of washing groove (6) and growing the grain groove (3), described purifying column bottom are oxidation pond (501), and the middle part is washing section (502), top is absorber portion (503), and described oxidation pond (501) is loaded with absorption liquid (51), and described cycles of washing groove (6) is loaded with cleaning solution (61), described growing the grain groove (3) is loaded with sulphur ammonium slurries (31), also comprises:
By absorbing the absorbent recirculation pump (16) that pipeloop exports with the absorption liquid of described purifying column (5) bottom oxidation pond (501) and the absorption liquid import of top absorber portion (503) is connected;
The cleaning circulation pump (8) that the cleaning solution outlet by cycles of washing pipeline (15) and described cycles of washing groove (6) and the cleaning solution import of purifying column (5) middle part washing section (502) are connected, and be communicated with that described purifying column (5) cleaning solution exports and the cleaning solution reflux pipeline (14) of described cycles of washing groove (6) cleaning solution import;
The absorption liquid rear pump (9) that is connected with the absorption liquid delivery outlet and middle part washing section (502) the absorption liquid input port of described purifying column (5) bottom oxidation pond (501) by the absorption liquid transfer line;
One-level cyclone (4) that is connected with described growing the grain groove (3) by the cleaning solution export pipeline and the cleaning solution delivery pump (7) that is connected with the cleaning solution delivery outlet and described one-level cyclone (4) the cleaning solution input port of described cycles of washing groove (3);
Be communicated with the sulphur ammonium slurries rear pumps (18) of described growing the grain groove (3) and the second cyclone (19) that is connected with sulphur ammonium slush pump (18) by sulphur ammonium slurries export pipeline, and also comprise;
The liquid-solid separation equipment that is connected with second cyclone (21), drying equipment (22) that is connected with described liquid-solid separation equipment (21) and the packaging facilities (23) that is connected with described drier (22);
It is characterized in that the sulphur ammonium concentration of described absorption liquid (51) is 5～45%, the sulphur ammonium concentration of described cleaning solution (61) is 46～55%, and the sulphur ammonium concentration of described sulphur ammonium slurries (31) is 55～65%.
2. exhausted smoke processing system according to claim 1 is characterized in that, also is provided with described absorption liquid (51) reflux pipeline (17) between described absorber portion (503) and described oxidation pond (501).
3. exhausted smoke processing system according to claim 1, it is characterized in that, the clear liquid pipeline (27) of described one-level cyclone (4) is communicated with described sink (6), the clear liquid pipeline (25) of described second cyclone (19) is communicated with described sink (6), and the mother liquor pipeline (26) of described centrifuge (21) is communicated with described sink (6).
4. exhausted smoke processing system according to claim 1, it is characterized in that, described washing section (502) is provided with wash spray device (52), also be provided with washing demister (53) in described wash spray device (52) top, and be provided with the rinse spray device that is connected with described absorption liquid rear pump (9) in described washing demister (53) top.
5. exhausted smoke processing system according to claim 1 is characterized in that, described cleaning circulation pump (8) has 2, and described absorbent recirculation pump (16) also has 2.
6. exhausted smoke processing system according to claim 1 is characterized in that, the exhanst gas outlet of described purifying column (5) is connected with in line chimney (28), and described in line chimney height is 30～100 meters.
7. exhausted smoke processing system according to claim 1, it is characterized in that, described absorber portion (503) and washing section (502) are separated by demarcation strip (57), have flue gas communication port and absorption liquid communication port on the described demarcation strip (57), described flue gas communication port upwards is connected with and rises gas cap (571), described absorption liquid communication port is connected with downspout (572) downwards, described washing section (502) and oxidation pond (501) are separated by demarcation strip (56), described demarcation strip has the flow of liquor port on (56), and described flow of liquor port is connected with downspout (562) downwards.
8. exhausted smoke processing system according to claim 1, it is characterized in that, described growing the grain groove (3) or oxidation pond (501) are provided with the adapter of adding raw material ammonia (2), and described oxidation pond (501) or absorber portion (503) are provided with the adapter of adding water (1).
9. exhausted smoke processing system according to claim 1 is characterized in that, described drying equipment (22) comprises roller, oscillatory type or fixed gas-solid fluidized drier.
10. exhausted smoke processing system according to claim 1 is characterized in that, described liquid-solid separation equipment (21) comprises vacuum belt formula dewaterer or centrifugal drier.
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| CN200910199057A CN101700464A (en) | 2009-11-19 | 2009-11-19 | Exhausted smoke processing system |
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| CN200910199057A CN101700464A (en) | 2009-11-19 | 2009-11-19 | Exhausted smoke processing system |
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| CN101700464A true CN101700464A (en) | 2010-05-05 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825220A (en) * | 2010-05-07 | 2010-09-08 | 海宁瑞星皮革有限公司 | DMF gas recovery device |
| CN101874972A (en) * | 2010-06-25 | 2010-11-03 | 北京紫光威肯环保工程技术有限公司 | Boiler flue gas desulfurization device by in-column crystallization ammonia process |
| CN103831003A (en) * | 2014-03-07 | 2014-06-04 | 中冶焦耐工程技术有限公司 | Regenerated tail gas purification combined tower |
| CN110508100A (en) * | 2019-08-30 | 2019-11-29 | 中国神华煤制油化工有限公司 | Smoke multistage washing system |
| CN113731113A (en) * | 2021-09-15 | 2021-12-03 | 北京工大环能科技有限公司 | System for reducing blockage of ammonium bisulfate of air preheater of coal-fired power plant |
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2009
- 2009-11-19 CN CN200910199057A patent/CN101700464A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825220A (en) * | 2010-05-07 | 2010-09-08 | 海宁瑞星皮革有限公司 | DMF gas recovery device |
| CN101825220B (en) * | 2010-05-07 | 2011-11-16 | 海宁瑞星皮革有限公司 | DMF gas recovery device |
| CN101874972A (en) * | 2010-06-25 | 2010-11-03 | 北京紫光威肯环保工程技术有限公司 | Boiler flue gas desulfurization device by in-column crystallization ammonia process |
| CN103831003A (en) * | 2014-03-07 | 2014-06-04 | 中冶焦耐工程技术有限公司 | Regenerated tail gas purification combined tower |
| CN103831003B (en) * | 2014-03-07 | 2015-09-23 | 中冶焦耐工程技术有限公司 | A kind of regeneration tail gas purification combination tower |
| CN110508100A (en) * | 2019-08-30 | 2019-11-29 | 中国神华煤制油化工有限公司 | Smoke multistage washing system |
| CN110508100B (en) * | 2019-08-30 | 2021-12-17 | 中国神华煤制油化工有限公司 | Flue gas multistage washing system |
| CN113731113A (en) * | 2021-09-15 | 2021-12-03 | 北京工大环能科技有限公司 | System for reducing blockage of ammonium bisulfate of air preheater of coal-fired power plant |
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Application publication date: 20100505 |