CN103446863A - Subarea-type gas-liquid heat exchange and flue gas desulfurizing device and desulfurizing method - Google Patents
Subarea-type gas-liquid heat exchange and flue gas desulfurizing device and desulfurizing method Download PDFInfo
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- CN103446863A CN103446863A CN2013100082933A CN201310008293A CN103446863A CN 103446863 A CN103446863 A CN 103446863A CN 2013100082933 A CN2013100082933 A CN 2013100082933A CN 201310008293 A CN201310008293 A CN 201310008293A CN 103446863 A CN103446863 A CN 103446863A
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Abstract
The invention discloses a subarea-type gas-liquid heat exchange and flue gas desulfurizing device and a desulfurizing method. The subarea-type gas-liquid heat exchange and flue gas desulfurizing device comprises trays (also known as demisters), a spray nozzle, multiple desulfurizing reaction zone units, a gas inlet, a water bucket and a chimney, wherein a desulfurizing reaction device is formed by the combination of the multiple desulfurizing reaction zone units; the demister is arranged between the two adjacent desulfurizing reaction zone units; the desulfurizing reaction zone units are connected to the chimney through the demisters. The subarea-type gas-liquid heat exchange and flue gas desulfurizing device and the desulfurizing method have the advantages that the problems of consumption of freshwater for flue gas desulfurization in thermal power generation, coal-fired boilers, iron and steel industry sintering plants or other industries in northern coastal areas which are lack of fresh water and rich in seawater sources are solved, the freshwater resources are saved by replacing freshwater with seawater, the desulfurizing cost is reduced for enterprises, and the economic benefits are improved.
Description
Technical field
The present invention relates to the flue gas desulfurization field, the pernicious gas in flue gas is absorbed, be specially the heat exchange of a kind of partition type gas-liquid and flue gas desulfur device and sulfur method.
Background technology
Thermoelectricity, coal-burning boiler, metallurgy industry produce the middle low-temperature flue gas of 120 ℃-180 ℃ in a large number, contain the SO over national standard in these flue gases
2if, do not processed, will cause serious pollution to air, threaten the people's physical and mental health.Therefore, state compulsion requires the flue gas desulfurization that must put into operation of above-mentioned industry.
Coal chemical enterprise to the technological requirement of gas cleaning is now, have the advantages such as efficient, energy-conservation, low-cost, the short flow process of high benefit, in flue gas desulfurization, wet desulphurization occupies the market share more than 85%, with dry desulfurization, compare, wet desulphurization need to consume a large amount of water resources; And at the Northern Coastal Provinces of China, as the wide geographic area to the north of the line of sea, Gansu Province lacks freshwater resources; And, in the ammonia process of desulfurization in wet desulphurization, current desulfurizing tower often can not solve the escaping of ammonia problem, main cause is not have technological means to absorb conversely ammonia to escape, because ammonia and SO
2absorption characteristics is fully contrary, if separately establish an ammonia absorber, needs again additional investment, increases business burden.
In order to solve the problems of the technologies described above, those skilled in the art is also at continuous improvement and bring new ideas, the utility model patent that for example patent No. is CN200920256734.0 discloses a kind ofly washes with coal gas the sintered flue gas desulfurization device that ammonia combines, reflux flue gas is carried out to desulfurization except ammonia work by Ammonic washing tower and desulfurizing tower internal duct mutual circulation, the double tower circulation technology that this device is used, the plant area area is large, circulating line is many, set up and install all very loaded down with trivial details, more difficult low cost, the characteristics of short flow process of reaching.The patent of invention that the patent No. is CN201120022278.0 discloses a kind of special purpose device of purification method of coke oven gas desulfurization deamination associating, by washing naphthalene precooling tower, desulfurizing tower, cooling device on water Ammonic washing tower and ammonia still and described various reaction tower carries out the combined desulfurization deamination to coke-stove gas, the method is cooling and the desulfurization deamination is effective, but the device of demand is more, all kinds of cooling towers and reaction tower are connected and concern complexity, maintenance difficult when equipment breaks down, in the situation that a device damages the situation that whole system can can't be used, do not meet the demand of actual production.Therefore, a kind of new equipment of exigence and method solve above-mentioned technical problem.
Summary of the invention
Problem for above-mentioned existence, the object of the invention be to provide a kind of simple in structure, easy to operate, cost is lower, and the desulfuration absorbing tower in the much higher zone of pernicious gas absorption efficiency, cooling, the desulfurization chemical reaction, the ammonia that complete flue gas in a desulfurizing tower absorb the functions such as chemical reaction.
For achieving the above object, the technical scheme of employing of the present invention: the heat exchange of a kind of partition type gas-liquid and flue gas desulfur device, comprise air inlet, reaction tower and desulfurization reaction zone, the desulfurization reaction zone top is connected with reaction tower through demister, reaction tower top is provided with chimney structure, reaction tower is set to the horizontal reacting tower, described desulfurization reaction zone is combined by a plurality of unit processes district, the quantity in unit process district can be arranged according to actual conditions, be provided with demister between two adjacent unit process districts, described desulfurizer global design becomes horizontal type structure, apparatus structure is set to chimney and the reaction tower integral structure is cigarette tower combined structure or chimney and reaction tower separate type.
As a modification of the present invention, described desulfurization reaction zone integral body is the shell structure of opening and internal run-through, and a side of desulfurization reaction zone is connected with air inlet, and opposite side communicates with chimney, also is provided with input hole and the tap of fluid on described desulfurization reaction zone.
As a modification of the present invention, the top in described each unit process district is provided with a plurality of nozzle arrangements, and below is connected with bucket, and described bucket is set to infundibulate, by pass into different reactant liquors in nozzle, can change the function of each reaction zone.
As a modification of the present invention, described unit process district is set to 3, it is the first module reaction zone, second unit reaction zone and the 3rd unit process district, can be set to according to the classification first module reaction zone that passes into liquid that cooling zone, second unit reaction zone are set to spray the ammonia desulfurization zone, the 3rd unit process district is set to spray ammonium hydrogen sulfate backwash district.
As a modification of the present invention, described unit process district is set to 2, i.e. first module reaction zone, and the second unit reaction zone, can be set to cooling zone according to the classification first module reaction zone that passes into liquid, the second unit reaction zone is set to reaction zone.
A kind of sulfur method that adopts the heat exchange of described partition type gas-liquid and flue gas desulfur device, said method comprising the steps of; 1) cooling, in low flue gas by air inlet, first unit process district that enters desulfurization reaction zone is cooling zone, sprays into liquid, liquid is for being seawater or ammoniacal liquor or fresh water, described liquid and flue gas generation heat exchange, it is cooling that flue gas obtains;
2) desulfurization reaction zone, in low flue gas by air inlet, the ammonia desulfurization zone sprayed in second the unit process district that enters desulfurization reaction zone, in this reaction zone, sprays into ammoniacal liquor, with flue gas generation chemical reaction, the pernicious gas in flue gas absorbed;
3) absorption of ammonia, in low flue gas by air inlet, ammonium hydrogen sulfate backwash district sprayed in the 3rd the unit process district that enters desulfurization reaction zone, in this reaction zone, sprays into sour water, and the ammonia in flue gas is absorbed.
Another partition type gas-liquid heat exchange in the technical program and the sulfur method of flue gas desulfur device, is characterized in that, said method comprising the steps of; 1) cooling, in low flue gas by air inlet, first unit process district that enters desulfurization reaction zone is cooling zone, sprays into seawater, described liquid and flue gas generation heat exchange, flue gas obtains cooling;
2) desulfurization reaction zone, in low flue gas pass through air inlet, the ammonia desulfurization zone sprayed in second the unit process district that enters desulfurization reaction zone, spray into lime or lime stone or magnesium hydroxide slurry or sodium carbonate or sodium hydroxide solution in this reaction zone, with flue gas generation chemical reaction, the pernicious gas in flue gas is absorbed.
Another partition type gas-liquid heat exchange in the technical program and the sulfur method of flue gas desulfur device, is characterized in that, said method comprising the steps of; 1) cooling and desulfurization, in low flue gas by air inlet, first unit process district that enters desulfurization reaction zone is cooling zone, sprays into ammoniacal liquor, described ammoniacal liquor and flue gas generation heat exchange, flue gas obtains cooling, the while pernicious gas of flue gas is absorbed;
2) absorption of ammonia: middle low-temperature flue gas enters second unit process zone of reaction zone by air inlet, spray into a considerable amount of sour waters, and the ammonia in flue gas is absorbed.
The invention has the advantages that: the desulfurization reaction zone that the present invention forms by a plurality of similar unit process districts, can difference according to actual needs pass into different reactant liquors, make a set of equipment can complete the process requirements of organizing different desulfurization, removing ammonia more, and the technical problem of phase mutual interference can not occur between each physical-chemical reaction, a whole set of equipment is simple, cost is lower, and energy-efficient, is convenient to large-scale production and promotes the use of.
Technical scheme of the present invention has utilized Northern Coastal Provinces to lack fresh water and the abundant advantage of seawater resources, with seawater, substitutes fresh water, has saved freshwater resources, for enterprise reduces desulphurization cost, increases economic benefit; Solved the ammonia of current thermal power generation, coal-burning boiler, steel industry sintering plant or other industry---the ammonia escape problem of ammonium sulfate method desulfurization, for cleaner production creates conditions.
The accompanying drawing explanation
Fig. 1 is three unit process district combination example structure schematic diagrames of the present invention;
The A that Fig. 2 is Fig. 1-A cutaway view;
Fig. 3 is two unit process district combination example structure schematic diagrames of the present invention;
The A that Fig. 4 is Fig. 2-A cutaway view;
Wherein, 1 demister, 2 nozzles, 3 desulfurization reaction zones, 3-1 first module reaction zone, 3-2 second unit reaction zone, 3-3 the 3rd unit process district, 4 air inlets, 5 buckets, 6 chimneys.
The specific embodiment
In order to deepen the understanding of the present invention and understanding, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
embodiment 1:as shown in Figure 1, 2, the heat exchange of a kind of partition type gas-liquid and flue gas desulfur device, comprise air inlet 4, reaction tower and desulfurization reaction zone 3, desulfurization reaction zone 3 tops are connected with reaction tower through demister 4, and reaction tower top is provided with chimney 6 structures, reaction tower is set to the horizontal reacting tower, described desulfurization reaction zone 3 is combined by a plurality of unit processes district, between two adjacent unit process districts, is provided with demister 4, and the quantity in unit process district can select varying number to be connected according to actual conditions.
embodiment 2:as shown in Figure 1, 2, described desulfurization reaction zone integral body is the shell structure of opening and internal run-through, and a side of desulfurization reaction zone 3 is connected with air inlet 4, and opposite side communicates with chimney 6, also is provided with input hole and the tap of fluid on described desulfurization reaction zone.All the other structures and advantage and embodiment 1 are identical.
embodiment 3:as shown in Figure 1, 2, the top of described each reaction zone is provided with a plurality of nozzles 2, and below is connected with bucket 5, and described bucket 5 is set to infundibulate, by pass into different reactant liquors in nozzle, can change the function of each reaction zone.All the other structures and advantage and embodiment 1 are identical.
embodiment 4: as shown in Figure 1, 2, described unit process district is set to 3, it is the first module reaction zone, second unit reaction zone and the 3rd unit process district, can be set to according to the classification first module reaction zone 3-1 that passes into liquid that cooling zone, second unit reaction zone 3-2 are set to spray the ammonia desulfurization zone, the 3rd unit process district 3-3 is set to spray ammonium hydrogen sulfate backwash district.
embodiment 5: as shown in Figure 3,4, as a modification of the present invention, described unit process district is set to 2, i.e. the first module reaction zone, the second unit reaction zone, can be set to cooling zone according to the classification first module reaction zone 3-1 that passes into liquid, second unit reaction zone 3-2 is set to reaction zone.
embodiment 6:as shown in Figure 1, 2, for the northern China coastal area that lacks freshwater resources, the present embodiment is used ammonia-ammonium sulfate method technique, the operating procedure of this technique is as follows: cooling step, flue gas enters first module reaction zone 3-1 by air inlet 4, and the first module reaction zone is cooling zone, by nozzle 2, sprays into seawater, seawater and flue gas generation heat exchange, flue gas obtains cooling; The desulfurization chemical reaction step, flue gas enters second unit reaction zone 3-2 by demister 1, and reaction zone 3-2, for spray ammonia react district, sprays into a considerable amount of ammoniacal liquor by nozzle 2, makes the harmful components SO of flue gas
2, HF, HCl, SO
3deng material, be absorbed; The absorption step of ammonia, flue gas enters the 3rd unit process district 3-3 by demister 1, and the 3rd unit process district 3-3 is the backwash district, by nozzle 2, sprays into a considerable amount of ammonium bicarbonate solns, makes the harmful components NH of flue gas
3deng material, be absorbed, for 100 * 10
4steel industry sintering plant or the Thermal Power Generation Industry of m3/h flue gas flow, used ammonia-ammonium sulfate method technique, with the desulfurization of this desulfurizing tower, can fresh-water-saving resource 600,000 t/a, and be worth 2,400,000 yuan/a.
embodiment 7:as Fig. 3, shown in 4, for the northern China coastal area that lacks freshwater resources, the present embodiment is used lime stone---gypsum technique, the operating procedure of this technique is as follows: cooling step, flue gas enters first module reaction zone 3-1 by air inlet 4, spray into seawater by nozzle 2, seawater and flue gas generation heat exchange, flue gas obtains cooling, the desulfurization chemical reaction step, flue gas enters second unit reaction zone 3-2 by demister 1, spray into a considerable amount of lime/lime stone/magnesium hydroxide slurries or sodium carbonate/sodium hydroxide solution by nozzle 2, make the harmful components SO of flue gas
2, HF, HCl, SO
3deng material, be absorbed.For 100 * 10
4steel industry sintering plant or the Thermal Power Generation Industry of m3/h flue gas flow, used lime stone---gypsum technique, with the desulfurization of this desulfurizing tower, can fresh-water-saving resource 600,000 t/a, and be worth 2,400,000 yuan/a.
embodiment 8:as shown in Figure 3,4, for the wantless area of freshwater resources, the present embodiment is used ammonia-ammonium sulfate method technique, the operating procedure of this technique is as follows: cooling and desulfurized step, flue gas enters first module reaction zone 3-1 by air inlet 4, by nozzle 2, sprays into a considerable amount of ammoniacal liquor, ammoniacal liquor and flue gas generation heat exchange, flue gas obtains cooling, simultaneously the harmful components SO of flue gas
2, HF, HCl, SO
3deng material, be absorbed: the absorption step of ammonia, flue gas enters second unit reaction zone 3-2 by demister 1, by nozzle 2, sprays into a considerable amount of sour waters, makes the harmful components NH of flue gas
3deng material, be absorbed.100 * 10
4the Thermal Power Generation Industry of m3/h flue gas flow, used ammonia---ammonium sulfate method technique, with the desulfurization of this desulfurizing tower, can thoroughly solve ammonia escape problem.
The present invention can also, by least one and embodiment 1 combination in embodiment 2,3,4 or 2,3,5 described technical characterictics, form new embodiment.
It should be noted that, above-described embodiment is only preferred embodiment of the present invention, not is used for limiting protection domain, the equivalents of having done on the basis of such scheme or substitute and all belong to protection scope of the present invention.
Claims (10)
1. partition type gas-liquid heat exchange and flue gas desulfur device, comprise air inlet, reaction tower and desulfurization reaction zone, the desulfurization reaction zone top is connected with reaction tower through demister, reaction tower top is provided with chimney structure, it is characterized in that, described desulfurization reaction zone is combined by a plurality of unit processes district, be provided with demister between two adjacent unit process districts, described desulfurizer global design becomes horizontal type structure, and apparatus structure is set to chimney and the reaction tower integral structure is cigarette tower combined structure or chimney and reaction tower separate type.
2. a kind of partition type gas-liquid according to claim 1 heat exchange and flue gas desulfur device, it is characterized in that, described desulfurization reaction zone integral body is the shell structure of opening and internal run-through, one side of desulfurization reaction zone is connected with air inlet, opposite side communicates with chimney, also is provided with input hole and the tap of fluid on described desulfurization reaction zone.
3. a kind of partition type gas-liquid according to claim 1 heat exchange and flue gas desulfur device, is characterized in that, the top in described each unit process district is provided with a plurality of nozzle arrangements, and below is connected with bucket, and described bucket is set to infundibulate.
4. a kind of partition type gas-liquid according to claim 1 heat exchange and flue gas desulfur device, is characterized in that, described reaction tower is set to the horizontal reacting tower.
5. according to claim 1 or 2 or 3 or 4 heat exchange of described a kind of partition type gas-liquid and flue gas desulfur devices, it is characterized in that, described unit process district is set to 3, it is the first module reaction zone, second unit reaction zone and the 3rd unit process district, can be set to according to the classification first module reaction zone that passes into liquid that cooling zone, second unit reaction zone are set to spray the ammonia desulfurization zone, the 3rd unit process district is set to spray ammonium hydrogen sulfate backwash district.
6. according to claim 1 or 2 or 3 or 4 heat exchange of described a kind of partition type gas-liquid and flue gas desulfur devices, it is characterized in that, described unit process district is set to 2, it is the first module reaction zone, the second unit reaction zone, can be set to cooling zone according to the classification first module reaction zone that passes into liquid, the second unit reaction zone is set to reaction zone.
7. an employing is as the sulfur method of the described partition type gas-liquid heat exchange of claim 1-5 any one claim and flue gas desulfur device, it is characterized in that, said method comprising the steps of: 1) cooling, in low flue gas pass through air inlet, first unit process district that enters desulfurization reaction zone is cooling zone, spray into liquid, described liquid and flue gas generation heat exchange, flue gas obtains cooling;
2) desulfurization reaction zone, in low flue gas by air inlet, the ammonia desulfurization zone sprayed in second the unit process district that enters desulfurization reaction zone, in this reaction zone, sprays into ammoniacal liquor, with flue gas generation chemical reaction, the pernicious gas in flue gas absorbed;
3) absorption of ammonia, in low flue gas by air inlet, ammonium hydrogen sulfate backwash district sprayed in the 3rd the unit process district that enters desulfurization reaction zone, in this reaction zone, sprays into sour water, and the ammonia in flue gas is absorbed.
8. sulfur method according to claim 7, is characterized in that, the liquid adopted in described step 1 is for being seawater or ammoniacal liquor or fresh water.
9. an employing is as the sulfur method of partition type gas-liquid heat exchange as described in claim 1-4 or 6 any one claims and flue gas desulfur device, it is characterized in that, said method comprising the steps of: 1) cooling, in low flue gas pass through air inlet, first unit process district that enters desulfurization reaction zone is cooling zone, spray into seawater, described liquid and flue gas generation heat exchange, flue gas obtains cooling;
2) desulfurization reaction zone, in low flue gas pass through air inlet, the ammonia desulfurization zone sprayed in second the unit process district that enters desulfurization reaction zone, spray into lime or lime stone or magnesium hydroxide slurry or sodium carbonate or sodium hydroxide solution in this reaction zone, with flue gas generation chemical reaction, the pernicious gas in flue gas is absorbed.
10. an employing is as the sulfur method of claim 1-4 or 6 any one claim described partition type gas-liquid heat exchanges and flue gas desulfur device, it is characterized in that, said method comprising the steps of: 1) cooling and desulfurization, in low flue gas pass through air inlet, first unit process district that enters desulfurization reaction zone is cooling zone, sprays into ammoniacal liquor, described ammoniacal liquor and flue gas generation heat exchange, flue gas obtains cooling, and the pernicious gas of flue gas is absorbed simultaneously;
2) absorption of ammonia: middle low-temperature flue gas enters second unit process zone of reaction zone by air inlet, spray into a considerable amount of sour waters, and the ammonia in flue gas is absorbed.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752153A (en) * | 2014-01-23 | 2014-04-30 | 冀文平 | Glue gas desulfurization and purification device |
| CN104324593A (en) * | 2014-10-22 | 2015-02-04 | 哈尔滨工程大学 | Ship waste gas double-loop washing and desulfurization device combining seawater and fresh water |
| WO2022052377A1 (en) * | 2020-09-14 | 2022-03-17 | 中冶南方工程技术有限公司 | Horizontal coal gas deacidification device and a coal gas dust removal system by dry process |
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| CN2535112Y (en) * | 2002-04-01 | 2003-02-12 | 广东杰特科技发展有限公司 | Horizontal line-box type streamer-discahrge flue gas desulfurizing wet reactor |
| CN201969488U (en) * | 2011-03-10 | 2011-09-14 | 南京龙源环保有限公司 | Partitioned type ammonia desulphurization absorption tower |
| CN203043835U (en) * | 2013-01-10 | 2013-07-10 | 番禺珠江钢管（连云港）有限公司 | Partitioned gas-liquid heat exchange and flue gas desulfurization device |
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| CN2535112Y (en) * | 2002-04-01 | 2003-02-12 | 广东杰特科技发展有限公司 | Horizontal line-box type streamer-discahrge flue gas desulfurizing wet reactor |
| CN201969488U (en) * | 2011-03-10 | 2011-09-14 | 南京龙源环保有限公司 | Partitioned type ammonia desulphurization absorption tower |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752153A (en) * | 2014-01-23 | 2014-04-30 | 冀文平 | Glue gas desulfurization and purification device |
| CN104324593A (en) * | 2014-10-22 | 2015-02-04 | 哈尔滨工程大学 | Ship waste gas double-loop washing and desulfurization device combining seawater and fresh water |
| WO2022052377A1 (en) * | 2020-09-14 | 2022-03-17 | 中冶南方工程技术有限公司 | Horizontal coal gas deacidification device and a coal gas dust removal system by dry process |
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