CN211562438U - Ammonia desulfurization tower - Google Patents
Ammonia desulfurization tower Download PDFInfo
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- CN211562438U CN211562438U CN201922128991.2U CN201922128991U CN211562438U CN 211562438 U CN211562438 U CN 211562438U CN 201922128991 U CN201922128991 U CN 201922128991U CN 211562438 U CN211562438 U CN 211562438U
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Abstract
The utility model provides an ammonia desulfurization tower, which relates to the technical field of flue gas treatment and comprises a desulfurization tower main body, a spraying layer and a cooling system; a plurality of spraying layers are arranged in the desulfurizing tower main body from top to bottom. The utility model provides an ammonia process desulfurizing tower a plurality of each of spraying the layer all are connected with a heat exchanger, the flow that the heat exchanger that the layer was connected that sprays that from the top down set up flows through is used for the liquid that sprays to increase in proper order, a plurality of liquid that spray the layer and use adopt under the same heat exchanger condition that carries out the heat transfer, a plurality of temperatures that spray layer spun liquid reduce from the bottom up, it has great difference in temperature to spray layer department spun liquid and flue gas in the superiors, accelerate the condensation of flue gas cooling and vapor, vapor concentrates on the superiors and sprays layer department and separate out in the superiors in making the flue gas, the moisture content in the flue gas has been reduced, chimney exit "white smoke" has been reduced and has been generated.
Description
Technical Field
The utility model relates to a technical field that the flue gas was handled especially relates to an ammonia process desulfurizing tower.
Background
The ammonia is a good SO2 absorbent, the water solubility is higher than that of a calcium-based desulfurizer, and the ammonia desulphurization has the characteristics of fast desulphurization reaction and high absorbent utilization rate.
The temperature of the cooled flue gas is usually 100 ℃, and the flue gas enters a desulfurizing tower and then passes through a concentration section and an absorption section. In the concentration section, ammonium sulfate slurry is concentrated by flue gas, and the temperature of the flue gas is reduced; in the absorption section, because the evaporated moisture in the concentration section enters the flue gas, the moisture content of the flue gas is increased to saturation, and the temperature of the flue gas and the temperature of the spraying slurry do not change after reaching a balanced state.
Most of slurry liquid drops are removed after the saturated wet flue gas passes through the demister, but saturated wet steam in the flue gas is discharged out of a chimney together with the flue gas. Under the condition that the outside air temperature is lower in winter, the temperature of the smoke is sharply reduced after the smoke leaves the chimney, the water vapor in the original smoke is changed from a saturated state to a supersaturated state, and the water vapor is rapidly condensed and separated out to form white smoke.
A large amount of soluble salts and condensable particulates accompany the flue gas into the atmosphere.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an ammonia process desulfurizing tower to solve present exhaust flue gas and contain a large amount of soluble salt and the technical problem of particulate matter that can condense.
The utility model provides an ammonia desulfurization tower, which comprises a desulfurization tower main body, a spraying layer and a cooling system; the desulfurizing tower is characterized in that a plurality of spraying layers are arranged in the desulfurizing tower main body from top to bottom, the cooling system comprises a plurality of heat exchangers, each spraying layer is connected with one heat exchanger, and the flow of liquid for spraying, passing through the heat exchangers connected with the spraying layers, is sequentially increased.
Further, the spraying layer comprises an absorption spraying layer and a cooling spraying layer, and the cooling spraying layer is arranged at the upper end of the absorption spraying layer;
the lower end of the cooling spraying layer is provided with a tower plate, the tower plate receives condensed water flowing down above the tower plate, the condensed water flows into a cooling spraying system connected with the cooling spraying layer, and the condensed water sprayed out of the cooling spraying layer is used for reducing the temperature of the flue gas.
Furthermore, the absorption spraying layer is connected with a slurry pool at the lower end of the desulfurization tower main body through an absorption spraying system, the absorption spraying system conveys slurry in the slurry pool to the absorption spraying layer, and the slurry is sprayed out of the absorption spraying layer and is used for reducing the temperature of the flue gas.
Furthermore, the cooling spraying system comprises a condensed water collecting tank and a condensed water circulating pump, the condensed water collected by the tower plate flows into the condensed water collecting tank, and the condensed water circulating pump enables the condensed water in the condensed water collecting tank to enter the cooling spraying layer after passing through the heat exchanger.
Further, the cooling system comprises a heat exchanger, a cooling tower, a cooling pool, a cooling circulating pump and a cooling pipeline, wherein the cooling pipeline enables the heat exchanger, the cooling tower, the cooling pool and the cooling circulating pump to form a cooling circulation.
Further, a concentration tower independent of the desulfurization tower main body is also included;
the concentration tower is connected with the desulfurizing tower main body, and the flue gas enters the concentration tower firstly and then enters the desulfurizing tower main body.
Further, the concentration tower comprises a concentration spraying layer, a concentration tank and a concentration circulating pump, the concentration circulating pump enables slurry in the concentration tank to enter the concentration spraying layer, the concentration spraying layer sprays the slurry, and the sprayed slurry is in countercurrent contact with the flue gas.
Furthermore, a slurry guide pump is arranged between the concentration tower and the desulfurization tower main body, and is used for conveying the slurry in the slurry pool in the desulfurization tower main body to the concentration pool of the concentration tower.
Further, be provided with gaseous cowling panel in the desulfurizing tower main part, gaseous cowling panel will desulfurizing tower main part separation upper and lower two parts, the flue gas warp gaseous cowling panel enters into the upper portion of desulfurizing tower main part.
Further, the heat exchanger is a plate heat exchanger.
The utility model provides an ammonia process desulfurizing tower a plurality of each of spraying the layer all are connected with a heat exchanger, the flow that the heat exchanger that the layer was connected that sprays that from the top down set up flows through is used for the liquid that sprays increases in proper order, a plurality of liquid that spray the layer and use adopt under the same heat exchanger condition that carries out the heat transfer, a plurality of temperature that spray layer spun liquid reduce from the bottom up, it has great difference in temperature to spray layer department spun liquid and flue gas in the superiors, accelerate the condensation of flue gas cooling and vapor, vapor concentrates on the superiors and sprays layer department and separate out in making the flue gas, the moisture content in the flue gas has been reduced, chimney exit "white smoke" has been reduced and has been generated, a large amount of soluble salt and the particulate matter that can condense have also been avoided simultaneously and has been followed the flue gas and got into the atmosphere.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an ammonia desulfurization tower provided by an embodiment of the present invention;
fig. 2 is a schematic structural view of the cooling system shown in fig. 1.
Icon: 100-a desulfurization tower main body; 200-a concentration tower; 201-a concentration tank; 202-concentration circulation pump; 203-concentrated spraying layer; 300-slurry tank; 400-gas fairing plate; 500-an absorbing spray layer; 600-cooling the spray layer; 700-column plate; 800-condensed water collection tank; 900-cooling tower; 110-a heat exchanger; 120-a cooling pool; 130-cooling circulation pump.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 and fig. 2, the utility model provides an ammonia desulfurization tower, which comprises a desulfurization tower main body 100, a spray layer and a cooling system; a plurality of spraying layers are arranged in the desulfurizing tower main body 100 from top to bottom, the cooling system comprises a plurality of heat exchangers 110, each spraying layer is connected with one heat exchanger 110, and the flow of liquid for spraying, which passes through the heat exchangers 110 connected with the spraying layers arranged from top to bottom, is sequentially increased.
In some embodiments, the plurality of spraying layers are respectively connected with one heat exchanger 110, the flow rate of the liquid of the heat exchanger 110 connected with the spraying layers arranged from top to bottom is sequentially increased, the same heat exchanger 110 is used for heat exchange, the temperature of the liquid sprayed out of the plurality of spraying layers from bottom to top is gradually reduced, the temperature of the liquid sprayed out of the spraying layer on the uppermost layer is the lowest, a large temperature difference is formed between the liquid and the flue gas, the cooling of the flue gas and the condensation of the water vapor in the flue gas are accelerated, the water vapor in the flue gas is concentrated on the spraying layer on the uppermost layer to be separated out, and the water content in the flue gas is reduced.
Based on the above embodiment, further, the spraying layer includes an absorption spraying layer 500 and a cooling spraying layer 600, and the cooling spraying layer 600 is disposed at the upper end of the absorption spraying layer 500;
the lower end of the cooling spray layer 600 is provided with a tower plate 700, the tower plate 700 receives condensed water flowing down above the tower plate 700, the condensed water flows into a cooling spray system connected with the cooling spray layer 600, and the condensed water sprayed out of the cooling spray layer 600 is used for reducing the temperature of the flue gas.
The layer of spraying sprays layer 500 and cooling and sprays layer 600 including absorbing, and a plurality of spray the layer of spraying of the top in the layer spray layer 600 for the cooling, and the temperature of spun comdenstion water is minimum, forms great difference in temperature with the flue gas, has accelerated the vapor condensation in flue gas cooling and the flue gas, and the steam concentrates on the layer department of spraying of the superiors in making the flue gas and appears.
The condensate water that separates out flows into cooling spray system on column plate 700 on, and the condensate water on the column plate 700 has been avoided separating out moisture and has got into desulfurization system after the defroster separation, leads to former desulfurization system water balance to destroy, produces a large amount of ammonium wastewater that contains that are difficult to handle.
Based on the above embodiment, further, the absorption spray layer 500 is connected to the slurry tank 300 at the lower end of the desulfurization tower main body 100 through an absorption spray system, the absorption spray system transports the slurry in the slurry tank 300 to the absorption spray layer 500, and the slurry is sprayed out from the absorption spray layer 500 to reduce the temperature of the flue gas.
In some embodiments, two absorption spray layers 500 are generally disposed in the desulfurization tower main body 100, each absorption spray layer 500 is connected to the slurry tank 300 through an absorption spray layer 500 system, and the absorption spray system can convey the slurry in the slurry tank 300 to the heat exchanger 110, lower the temperature of the slurry, and convey the slurry to the absorption spray layers 500.
Because the flue gas enters into the temperature of desulfurizing tower main part 100 and makes the change, only rely on one to absorb the water content that sprays the layer 500 and can't make the flue gas and reach the saturated condition, in order to avoid the water content that an absorption sprays the layer 500 and can't make the flue gas of higher temperature to reach the saturated condition, be provided with two absorption in desulfurizing tower main part 100 and spray layer 500, two absorption spray layer 500, can avoid because local flue gas temperature is too high, and can't reach the problem that the water content is saturated, when the flue gas reachs the cooling and sprays layer 600, the vapor that contains in the flue gas can a large amount of condensation, reduce the water content of flue gas.
When the slurry sprayed from the absorption spraying layer 500 is used for removing SO2 and dust in flue gas, the characteristics of large droplet surface area and high gas-liquid heat exchange efficiency of the slurry are utilized, the flue gas balance temperature in the desulfurizing tower is synchronously reduced during desulfurization, and the moisture content of the flue gas at the outlet of the desulfurizing tower is reduced.
The flue gas passing through the cooling spray layer 600 is subjected to subsequent wet electric dust removal, MGGH reheating, hot blast stove heating, denitration and other processes, and then the temperature is raised to 110 ℃ for emission, at the moment, the water content in the flue gas is only 9% -12%, the water vapor in the flue gas is far from reaching the saturated state, and soluble particles and inorganic salts entering the air are reduced. Thereby realizing the aim of 'whitening' at the outlet of the desulfurization chimney.
Based on the above embodiment, further, the cooling spray system includes a condensed water collection tank 800 and a condensed water circulation pump, the condensed water collected by the tower plate 700 flows into the condensed water collection tank 800, and the condensed water circulation pump makes the condensed water in the condensed water collection tank 800 enter the cooling spray layer 600 after passing through the heat exchanger 110.
Based on above-mentioned embodiment basis, in some embodiments, cooling spraying system includes condensate water collection tank 800, the condensate water of collecting on the column plate 700 can flow into condensate water collection tank 800, unnecessary condensate water can be collected in condensate water collection tank 800, and this partial condensate water quality of water is comparatively clean, introduce condensate water collection tank 800 after collecting, can be used as equipment washing water, and this condensate water collects the water in the tank 800, can also sinter the production water, with condensate water reutilization, using water wisely.
As shown in fig. 2, based on the above embodiment, further, the cooling system includes a heat exchanger 110, a cooling tower 900, a cooling pool 120, a cooling circulation pump 130, and a cooling pipeline, and the cooling pipeline enables the heat exchanger 110, the cooling tower 900, the cooling pool 120, and the cooling circulation pump 130 to form a cooling circulation.
In some embodiments, after the cooling water exchanged heat by the heat exchanger 110 flows into the cooling tower 900, and after the cooling water is cooled in the cooling tower 900 and enters the cooling pool 120, the cooling circulation pump 130 injects the water in the cooling pool 120 into the heat exchanger 110 through the cooling pipeline for heat exchange, thereby forming a complete cooling cycle.
Based on the above embodiment, further, the desulfurization tower further includes a concentration tower 200 independent from the desulfurization tower main body 100;
the concentration tower 200 is connected to the desulfurization tower main body 100, and the flue gas firstly enters the concentration tower 200 and then enters the desulfurization tower main body 100.
On the basis of the above embodiment, the concentration tower 200 is disposed independently of the main body 100 of the desulfurization tower, and the flue gas enters the concentration tower 200 first, passes through the concentration tower 200, and then enters the main body 100 of the desulfurization tower.
Based on the above embodiment, further, the concentration tower 200 includes a concentration spraying layer 203, a concentration tank 201, and a concentration circulating pump 202, the concentration circulating pump 202 makes the slurry in the concentration tank 201 enter the concentration spraying layer 203, the concentration spraying layer 203 sprays the slurry, and the sprayed slurry contacts with the flue gas in a counter-current manner.
Based on the above embodiment, a slurry guiding pump is further disposed between the concentrating tower 200 and the desulfurizing tower main body 100, and the slurry guiding pump is used for conveying the slurry in the slurry tank 300 in the desulfurizing tower main body 100 to the concentrating tank 201 of the concentrating tower 200.
The slurry guiding pump is controlled to convey the slurry in the slurry tank 300 to the concentration tank 201 of the concentration tower 200 according to the height of the liquid level in the concentration tower 200.
Based on above-mentioned embodiment basis, further, be provided with gas fairing 400 in the desulfurizing tower main part 100, gas fairing 400 will desulfurizing tower main part 100 separates upper and lower two parts, the flue gas passes through gas fairing 400 enters into the upper portion of desulfurizing tower main part 100.
The gas rectifying plate 400 is provided in the desulfurization tower main body 100, and the flue gas entering the desulfurization tower main body 100 passes through the gas rectifying plate 400, and the rotating flue gas is changed into the flue gas flowing in a straight line.
Based on the above embodiments, further, the heat exchanger 110 is a plate heat exchanger.
Each spraying layer of the plurality of spraying layers of the ammonia desulfurization tower provided by the utility model is connected with a heat exchanger 110, the flow of the liquid for spraying flowing through the heat exchanger 110 connected with the spraying layers arranged from top to bottom is increased in sequence, and the temperature of the liquid sprayed out of the plurality of spraying layers is reduced from bottom to top under the condition that the liquid for the plurality of spraying layers adopts the same heat exchanger for heat exchange, the liquid sprayed out of the uppermost spraying layer has larger temperature difference with the flue gas, so that the temperature reduction of the flue gas and the condensation of water vapor are accelerated, the water vapor in the flue gas is concentrated at the uppermost spraying layer to be separated out, therefore, the method can collect relatively clean flue gas condensate water as production water, reduce the moisture content in the flue gas, reduce the generation of white smoke at the outlet of the chimney, and simultaneously avoid a large amount of soluble salts and condensable particles from entering the atmosphere along with the flue gas.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. An ammonia desulfurization tower is characterized by comprising a desulfurization tower main body, a spraying layer and a cooling system; the desulfurizing tower is characterized in that a plurality of spraying layers are arranged in the desulfurizing tower main body from top to bottom, the cooling system comprises a plurality of heat exchangers, each spraying layer is connected with one heat exchanger, and the flow of liquid for spraying, passing through the heat exchangers connected with the spraying layers, is sequentially increased.
2. The ammonia desulfurization tower according to claim 1, wherein the spray layer comprises an absorption spray layer and a cooling spray layer, and the cooling spray layer is arranged at the upper end of the absorption spray layer;
the lower end of the cooling spraying layer is provided with a tower plate, the tower plate receives condensed water flowing down above the tower plate, the condensed water flows into a cooling spraying system connected with the cooling spraying layer, and the condensed water sprayed out of the cooling spraying layer is used for reducing the temperature of the flue gas.
3. The ammonia desulfurization tower of claim 2, wherein the absorption spray layer is connected to a slurry tank at the lower end of the desulfurization tower main body through an absorption spray system, the absorption spray system transports slurry in the slurry tank to the absorption spray layer, and the slurry is sprayed out of the absorption spray layer to reduce the temperature of flue gas.
4. The ammonia desulfurization tower of claim 2, wherein the cooling spray system comprises a condensate water collection tank and a condensate water circulating pump, the condensate water collected by the tower plate flows into the condensate water collection tank, and the condensate water circulating pump makes the condensate water in the condensate water collection tank enter the cooling spray layer after passing through the heat exchanger.
5. The ammonia desulfurization tower of claim 1, wherein the cooling system comprises a heat exchanger, a cooling tower, a cooling pool, a cooling circulation pump, and a cooling pipeline that forms a cooling circulation for the heat exchanger, the cooling tower, the cooling pool, and the cooling circulation pump.
6. The ammonia desulfurization tower of claim 1, further comprising a concentration tower independent of the desulfurization tower body;
the concentration tower is connected with the desulfurizing tower main body, and the flue gas enters the concentration tower firstly and then enters the desulfurizing tower main body.
7. The ammonia desulfurization tower of claim 6, wherein the concentration tower comprises a concentration spray layer, a concentration tank and a concentration circulating pump, the concentration circulating pump enables slurry in the concentration tank to enter the concentration spray layer, the concentration spray layer sprays out the slurry, and the sprayed slurry is in countercurrent contact with flue gas.
8. The ammonia desulfurization tower of claim 6, wherein a slurry guide pump is arranged between the concentration tower and the desulfurization tower main body, and the slurry guide pump is used for conveying slurry in the slurry pool in the desulfurization tower main body to the concentration pool of the concentration tower.
9. The ammonia desulfurization tower of claim 1, wherein a gas rectifying plate is disposed in the desulfurization tower main body, the gas rectifying plate separates the desulfurization tower main body into an upper part and a lower part, and flue gas enters the upper part of the desulfurization tower main body through the gas rectifying plate.
10. The ammonia desulfurization tower of claim 1, wherein the heat exchanger is a plate heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922128991.2U CN211562438U (en) | 2019-11-29 | 2019-11-29 | Ammonia desulfurization tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922128991.2U CN211562438U (en) | 2019-11-29 | 2019-11-29 | Ammonia desulfurization tower |
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| CN211562438U true CN211562438U (en) | 2020-09-25 |
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| CN201922128991.2U Active CN211562438U (en) | 2019-11-29 | 2019-11-29 | Ammonia desulfurization tower |
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