CN211302510U - Flue gas condensation takes off white defogging gas wash tower - Google Patents
Flue gas condensation takes off white defogging gas wash tower Download PDFInfo
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- CN211302510U CN211302510U CN201921810843.2U CN201921810843U CN211302510U CN 211302510 U CN211302510 U CN 211302510U CN 201921810843 U CN201921810843 U CN 201921810843U CN 211302510 U CN211302510 U CN 211302510U
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Abstract
The utility model relates to a white defogging gas wash tower is taken off in flue gas condensation, comprising a tower body, the inside of tower body is supreme slurry zone, the spray region, defogging dust zone and the zone of heating of having set gradually from bottom to top, be provided with a plurality of spray set of supreme interval arrangement from bottom to bottom in the spray region, be provided with tube bank formula defogging dust remover in the defogging dust zone, be provided with heating device in the zone of heating, spray set is used for condensing the flue gas, tube bank formula defogging dust remover is used for carrying out the defogging dust removal to the flue gas after the condensation, heating device is used for heating the flue gas after the defogging dust removal. The utility model relates to a flue gas condensation takes off white defogging gas wash tower has easy operation, practices thrift area, running cost low, advantage that dust collection efficiency is high.
Description
Technical Field
The utility model belongs to smoke pollutants and flue gas take off white control field, concretely relates to flue gas condensation takes off white defogging gas wash tower.
Background
The existing desulfurizing tower is usually matched with an electric dust remover for use so as to achieve the environmental protection target of flue gas desulfurization and dust removal, has the defects of large occupied area, high environmental protection investment cost, complex operation, low dust removal efficiency and the like, and can not realize the whitening of the flue gas. With the improvement of the economic development level, the existing desulfurizing tower cannot meet the latest smoke pollutant emission index requirement of the current national environmental protection nowadays increasingly emphasizing the environmental protection. Therefore, it is particularly important to find a flue gas condensation, whitening, demisting and dedusting tower with low cost and small floor area.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to above-mentioned prior art provide an easy operation, practice thrift area, running cost low, flue gas condensation that dust collection efficiency is high takes off white defogging gas wash tower.
The utility model provides a technical scheme that above-mentioned problem adopted does: the utility model provides a white defogging gas wash tower is taken off in flue gas condensation, includes the tower body, the inside of tower body is supreme from bottom to be provided with thick liquid district, spray zone, defogging dust removal district and the zone of heating in proper order, be provided with a plurality of spray set of supreme interval arrangement from bottom to bottom in the spray zone, be provided with tube bundle formula defogging dust remover in the defogging dust removal district, be provided with heating device in the zone of heating, spray set is used for condensing the flue gas, tube bundle formula defogging dust remover is used for carrying out the defogging dust removal to the flue gas after the condensation, heating device is used for heating the flue gas after the.
Preferably, spray set includes the multilayer layer that sprays, it includes a plurality of atomizing nozzles who arranges side by side to spray the layer, be provided with circulating line between the thick liquid district of atomizing nozzle and tower body bottom, the last circulating pump that is provided with of circulating line.
Preferably, the tube bundle type demisting and dedusting device comprises a plurality of guide tubes which are vertically arranged, two guide vanes which are vertically arranged are arranged in each guide tube, and a rotational flow assembly is arranged between the two guide vanes.
Preferably, the rotational flow component comprises a straight cylinder and two opposite tapered conical cylinders arranged in the straight cylinder, and the two conical cylinders are arranged in an up-down symmetrical manner and are communicated with each other.
Preferably, the large caliber of the conical cylinder is the same as the inner diameter of the straight cylinder.
Preferably, the heat source of the heating device adopts flue gas heating or electric heating.
Preferably, a chimney is arranged at the top of the tower body.
Compared with the prior art, the utility model has the advantages of:
1. the utility model provides an inside has set gradually spray set, tube bundle formula defogging dust remover and heating device from bottom to supreme, compact structure, saving place, when operation easy operation, running cost low, safe and reliable, dust collection efficiency height, flue gas heating range are lower in the tower, can realize better dust removal and take off white effect.
2. Because the tube bundle type demisting and dedusting device is arranged in the flue gas condensation and whitening demisting and dedusting tower, the field is saved, meanwhile, small particles in the flue gas can be removed, the denitration of a follow-up SCR catalyst is not influenced, and the dust in the flue gas is up to standard.
3. The utility model discloses install the chimney at the top of tower body, practice thrift place, reduce cost, dust removal up to standard back can directly discharge through the white flue gas of taking off after the condensation reheating.
Drawings
FIG. 1 is the utility model relates to a sintering flue gas SCR denitration and de-whitening system's schematic diagram.
Fig. 2 is a schematic structural diagram of a flue gas condensation, de-whitening, demisting and dedusting tower.
FIG. 3 is a schematic view of the internal structure of a flow guide tube in a tube bundle type mist and dust remover.
FIG. 4 is a top view of a tube bundle defogging dust collector.
Wherein:
the system comprises a flue gas condensation, whitening, demisting and dedusting tower 1, a tower body 101, a chimney 102, a spraying device 103, a spraying layer 103.1, an atomizing nozzle 103.2, a tube bundle type demisting and dedusting device 104, a guide tube 104.1, guide vanes 104.2, a straight cylinder 104.3, a conical cylinder 104.4 and a heating device 105
The heat exchange device 2, a raw flue gas inlet 21, a raw flue gas outlet 22, a purified flue gas inlet 23 and a purified flue gas outlet 24
A blower 3,
A hot blast furnace 4,
An ammonia water evaporator 5,
A dilution fan 6,
An ammonia injection grid 7,
An SCR denitration reaction device 8,
Draught fan 9
First main flue 11
Second main flue 12
Third main flue 13
Fourth main flue 14
A bypass flue 15.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Referring to fig. 1-4, the utility model relates to a sintering flue gas SCR denitration whitening system, which comprises a flue gas condensation whitening, demisting and dedusting tower 1, a heat exchange device 2, a hot-blast stove 4, an ammonia evaporator 5, a dilution fan 6, an ammonia injection grid 7, an SCR denitration reaction device 8 and a smoke exhaust device 10, wherein a first main flue 11 is connected between an original flue gas inlet 21 at the lower part of the heat exchange device 2 and an air outlet of the flue gas condensation whitening, demisting and dedusting tower 1, a second main flue 12 is connected between an original flue gas outlet 22 at the upper part of the heat exchange device 2 and an air inlet of the SCR denitration reaction device 8, a third main flue 13 is connected between a clean flue gas inlet 23 at the upper part of the heat exchange device 2 and an air outlet of the SCR denitration reaction device 8, and a fourth main flue 14 is connected between a clean flue gas outlet 24 at the lower part of the heat, the hot blast stove 4 and the ammonia injection grid 7 are sequentially arranged along the flow direction of flue gas in the second main flue 12, a branch flue 15 is connected between the hot blast stove 4 and the second main flue 12, the ammonia injection grid 7 is arranged on the second main flue 12, the ammonia evaporator 5 and the dilution fan 6 are arranged between the ammonia injection grid 7 and the third main flue 13, the ammonia evaporator 5 is used for evaporating and vaporizing concentrated ammonia water into ammonia gas, the dilution fan 6 is used for introducing part of high-temperature clean flue gas denitrated by the SCR denitration reaction device 8 into the ammonia evaporator 5 so as to mix the high-temperature clean flue gas with the ammonia gas and dilute the concentration of the ammonia gas, and the ammonia injection grid 7 is used for injecting the mixed ammonia gas into the second main flue 12;
the flue gas condensation, de-whitening, demisting and dedusting tower 1 comprises a tower body 101, a chimney 102 is arranged at the top of the tower body 101, a slurry area, a spraying area, a demisting and dedusting area and a heating area are sequentially arranged in the tower body 101 from bottom to top, a plurality of spraying devices 103 are arranged in the spraying area at intervals from bottom to top, a tube bundle type demisting and dedusting device 104 is arranged in the demisting and dedusting area, a heating device 105 is arranged in the heating area, the spraying devices 103 are used for condensing flue gas, the tube bundle type demisting and dedusting device 104 is used for demisting and dedusting condensed flue gas, and the heating device 105 is used for heating the flue gas after demisting and dedusting, so that saturated flue gas is changed into unsaturated flue gas, thereby realizing demisting and dedusting of flue gas and de-whitening of flue gas, and achieving;
the spraying device 103 comprises a plurality of spraying layers 103.1, the spraying layers 103.1 comprise a plurality of atomizing nozzles 103.2 which are arranged side by side, a circulating pipeline is arranged between the atomizing nozzles 103.2 and a slurry area at the bottom of the tower body 101, and a circulating pump is arranged on the circulating pipeline;
the spraying layer 103.1 is provided with at least three layers;
the tube bundle type demisting and dedusting device 104 comprises a plurality of guide tubes 104.1 which are vertically arranged, two guide vanes 104.2 which are vertically arranged are arranged in the guide tube 104.1, a rotational flow component is arranged between the two guide vanes 104.2, the rotational flow component comprises a straight cylinder 104.3 and two relatively reduced conical cylinders 104.4 which are arranged in the straight cylinder 104.3, the two conical cylinders 104.4 are vertically and symmetrically arranged and are communicated with each other, the large caliber of the conical cylinder 104.4 is the same as the inner diameter of the straight cylinder 104.3, and the flow velocity of flue gas can be accelerated by the matching use of the guide vanes 104.2 and the rotational flow component, so that mist and micro-dust particles in the flue gas can be fully separated and purified;
the heat source of the heating device 105 heats the demisted and dedusted flue gas by adopting flue gas heating or electric heating, and the flue gas is discharged through the chimney 102 when the temperature of the flue gas is heated to the temperature set by the local environment;
the spraying area and the demisting and dedusting area are respectively provided with a spraying flushing device and a demister flushing device which are respectively used for periodically flushing the spraying device 103 and the tube bundle type demisting and dedusting device 104 so as to avoid blockage caused by accumulation of smoke dust;
the heat exchange device 2 is a rotary GGH heat exchanger, and has the advantages of mature technology, corrosion resistance, uneasiness for ash blocking and the like, the heat exchange device 2 is used for carrying out heat exchange treatment on low-temperature raw flue gas treated by the flue gas condensation, whitening, demisting and dedusting tower 1 and high-temperature clean flue gas after being denitrated by the SCR denitration reaction device 8, namely, carrying out primary heating treatment on the low-temperature raw flue gas and cooling treatment on the high-temperature clean flue gas, the heat exchange device 2 realizes flue gas heat exchange before and after denitration, and effectively saves energy;
the heat source of the hot blast stove 4 adopts blast furnace gas to carry out secondary heating treatment on the flue gas, so that the temperature of the flue gas is heated to the temperature range required by the SCR denitration reaction device 8;
one end of the hot blast stove 4 is connected with a blower 3, and the combustion temperature of the hot blast stove 4 is adjusted through the air doping amount of the blower 3;
the ammonia water evaporator 5 is a high temperature and high pressure resistant container, concentrated ammonia water and compressed air are atomized under the action of a spray gun arranged in the ammonia water evaporator 5, and are heated under the action of high temperature clean flue gas after denitration introduced by a dilution fan 6, so that the concentrated ammonia water is vaporized into ammonia gas and is mixed with the flue gas, and the mixed ammonia gas is sprayed into the second main flue 12 through an ammonia spraying grid 7 and is further mixed with the original flue gas in the second main flue 12;
the ammonia injection grid 7 comprises a plurality of thin steel pipes which are parallel to each other up and down, a plurality of injection holes which are arranged at intervals along the length direction of the thin steel pipes are formed in the thin steel pipes, and the opening direction of the injection holes is the same as the flowing direction of the flue gas in the second main flue 12;
the SCR denitration reactor 8 is a medium-low temperature SCR denitration reactor, and two catalyst reaction layers and a catalyst reservation layer are arranged in the SCR denitration reactor;
and an induced draft fan 9 is arranged on the fourth main flue 14.
A sintering flue gas SCR denitration and de-whitening process adopts a sintering flue gas SCR denitration and de-whitening system to perform denitration and de-whitening treatment on sintering flue gas subjected to wet desulphurization, and comprises the following specific steps:
step one, a flue gas de-whitening condensation and flue gas demisting and dedusting stage
The sintering flue gas after wet desulphurization enters a flue gas condensation, whitening, demisting and dedusting tower, and passes through a spraying zone, a demisting and dedusting zone and a heating zone in sequence to change saturated flue gas into unsaturated flue gas, so that the purposes of whitening, condensing and demisting and dedusting the flue gas are realized;
the flue gas is subjected to whitening condensation by a spraying device, partial pollutants and particulate matters in the flue gas are removed, the temperature of the flue gas is further reduced by a tube bundle type demisting dust remover, the moisture content in saturated wet flue gas is removed, particulate matters, liquid drops and the like in the flue gas can be removed, and finally the temperature of the flue gas is heated to the temperature set by the local environment (over 75 ℃ in summer and over 80 ℃ in winter) by a heating zone and then is discharged into a first main flue through a chimney;
step two, a flue gas temperature rising stage
a. Flue gas heat exchange before denitration
The flue gas after being subjected to whitening condensation, demisting and dedusting is subjected to primary temperature rise to about 245 ℃ through a heat exchange device;
b. second heating
Secondarily heating the flue gas subjected to heat exchange to about 280 ℃ through a hot blast stove;
step three, ammonia spraying treatment stage
The concentrated ammonia water is vaporized into ammonia gas in the ammonia water evaporator, part of high-temperature clean flue gas denitrated by the SCR denitration reaction device is introduced into the ammonia water evaporator by the dilution fan to be mixed with the ammonia gas, the mixed ammonia gas is sprayed into the second main flue through the ammonia spraying grid, and the mixed ammonia gas is further mixed with the flue gas which is secondarily heated in the second main flue;
step four, SCR denitration treatment stage
The flue gas after secondary heating and ammonia gas are mixed and then enter an SCR denitration reaction device, and are mixed with the flue gas in the SCR denitration reaction device again, the ammonia gas (NH3) is fully mixed with nitrogen oxide (NOx) in the flue gas, a chemical reaction is carried out under the action of a catalyst, the NOx is removed, and the reaction equation is as follows:
step five, a smoke cooling stage
Cooling the denitrated high-temperature clean flue gas to 85-90 ℃ through a heat exchange device;
step six, smoke discharging stage
And discharging the denitrated and whitened smoke through the smoke exhaust device after the cooled clean smoke.
After the process flow, the content concentration of nitrogen oxide in the sintering flue gas after wet desulphurization can reach the standard of ultra-clean emission, namely NOx is less than or equal to 50mg/m3In addition, after the desulfurized sintering flue gas is treated by a condensation reheating method, the emission temperature of the desulfurized sintering flue gas is about 85-90 ℃, and the aims of flue gas denitration and flue gas whitening are successfully realized.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (7)
1. The utility model provides a white defogging gas wash tower is taken off in flue gas condensation, includes tower body (101), its characterized in that: the inside of tower body (101) has set gradually thick liquids district, spray zone, defogging dust removal district and the zone of heating from bottom to top, be provided with a plurality of spray set (103) of supreme interval arrangement from bottom to top in the spray zone, be provided with tube bundle formula defogging dust remover (104) in the defogging dust removal district, be provided with heating device (105) in the zone of heating, spray set (103) are used for condensing the flue gas, tube bundle formula defogging dust remover (104) are used for carrying out the defogging dust removal to the flue gas after the condensation, heating device (105) are used for heating the flue gas after the defogging dust removal.
2. The flue gas condensation, whitening, demisting and dedusting tower according to claim 1, is characterized in that: spray set (103) including multilayer spray layer (103.1), spray layer (103.1) including a plurality of atomizing nozzle (103.2) of arranging side by side, be provided with circulating line between the thick liquid district of atomizing nozzle (103.2) and tower body (101) bottom, the last circulating pump that is provided with of circulating line.
3. The flue gas condensation, whitening, demisting and dedusting tower according to claim 1, is characterized in that: the tube bundle type demisting and dedusting device (104) comprises a plurality of guide tubes (104.1) which are vertically arranged, two guide vanes (104.2) which are vertically arranged are arranged in the guide tubes (104.1), and a rotational flow assembly is arranged between the two guide vanes (104.2).
4. The flue gas condensation, de-whitening, demisting and dedusting tower according to claim 3, characterized in that: the cyclone assembly comprises a straight cylinder (104.3) and two opposite tapered conical cylinders (104.4) arranged in the straight cylinder (104.3), wherein the two conical cylinders (104.4) are arranged vertically and symmetrically and are communicated with each other.
5. The flue gas condensation, de-whitening, demisting and dedusting tower according to claim 4, characterized in that: the large caliber of the conical cylinder (104.4) is the same as the inner diameter of the straight cylinder (104.3).
6. The flue gas condensation, whitening, demisting and dedusting tower according to claim 1, is characterized in that: the heat source of the heating device (105) adopts smoke heating or electric heating.
7. The flue gas condensation, whitening, demisting and dedusting tower according to claim 1, is characterized in that: and a chimney (102) is arranged at the top of the tower body (101).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921810843.2U CN211302510U (en) | 2019-10-25 | 2019-10-25 | Flue gas condensation takes off white defogging gas wash tower |
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| CN201921810843.2U CN211302510U (en) | 2019-10-25 | 2019-10-25 | Flue gas condensation takes off white defogging gas wash tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110772914A (en) * | 2019-10-25 | 2020-02-11 | 江苏朗润环保科技有限公司 | Flue gas condensation takes off white defogging gas wash tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110772914A (en) * | 2019-10-25 | 2020-02-11 | 江苏朗润环保科技有限公司 | Flue gas condensation takes off white defogging gas wash tower |
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