CN203777862U - Multi-stage purification device for dusty gas - Google Patents
Multi-stage purification device for dusty gas Download PDFInfo
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- CN203777862U CN203777862U CN201320777728.6U CN201320777728U CN203777862U CN 203777862 U CN203777862 U CN 203777862U CN 201320777728 U CN201320777728 U CN 201320777728U CN 203777862 U CN203777862 U CN 203777862U
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Abstract
The utility model provides a multi-stage purification device for dusty gas. The multi-stage purification device comprises a spray tower, a venturi scrubber, a separator and a foam washer which are sequentially connected. After the multi-stage purification device for the dusty gas is adopted, the removal efficiency of ultrafine particles which are smaller than 1mu m in the dusty gas can be greatly increased and reaches more than 95%; the content of fine dust in the clean synthesis gas obtained by treatment is less than 1.0mg/ Nm<3>, and the foam washer is not blocked; the multi-stage purification device is simple and convenient in technology and can meet the different demands of industrial production.
Description
Technical field
The utility model relates to gas purifying equipment, particularly a kind of stage purification equipment of dusty gas.
Background technology
Needs based on industrial production and environmental protection, dusty gas is entering follow-up workshop section or is entering before atmosphere, often needs to carry out purified treatment, to meet the requirement to dust burdening in gas of industrial production and airborne release.According to the physics and chemistry feature of ash particle in technological property and requirement and gas, actual industrial process has formed different dusty gas process for purifying.
Wet scrubbing dedusting has relatively high removal efficiency to being greater than the thin ash of 1 μ m.In dusty gas not bery high, the thin ash content of proportion of ash more but be less than that the ultra-fine ash content of 1 μ m is lower, ash particle has after certain hydrophily and dedusting lower for the requirement of the dust burdening in gas, can select wet scrubbing dust arrester, such as gas that the thermal conversion processes of the solid carbon-contg materials such as coal is produced, the technique described in more options.But, when in dusty gas, ash content ultra-fine grey accounting higher, that be less than 1 μ m hydrophobicity great and thin ash particle is stronger, above-mentioned technique is difficult to the clean-up effect that reaches desirable, for example: adopt ash coal by powdered coal pressuring gasified production Clean synthesis gas, with regard to inapplicable above-mentioned technique.
In prior art, for being less than removing of 1 μ m ultra-fine grain in gas, main path is that pretreatment facility is set before cleaner, is removed after making it grow up into larger particles by physics or chemical action.But the removal effect of this technique is not good, in dusty gas, be less than the removal efficiency less than 60% of 1 μ m ultra-fine grain, the content of processing the thin ash in the clean synthesis gas obtaining is 150mg/m
3, what be greater than requirement is less than 1mg/Nm about thin ash content in clean synthesis gas
3standard, and the method easily causes the clogging of the equipment of wet scrubbing process for purifying, further affected treatment effect, thereby had a strong impact on industrial production.
Utility model content
The technical problems to be solved in the utility model is in order to overcome in prior art, the treatment effeciency of the dusty gas that ultra-fine grey accounting higher for ash content in ash gas, that be less than 1 μ m hydrophobicity great and thin ash particle is stronger is not high, the ratio of the following ultra-fine ash of 1 μ m after processing in gas is large, and easily cause the defect of obstruction of the equipment of process for purifying, a kind of stage purification equipment of dusty gas is provided.The stage purification equipment of dusty gas of the present utility model has improved the removal efficiency that is less than 1 μ m ultra-fine grain in dusty gas greatly, and removal efficiency reaches more than 95%, and the content of processing the thin ash in the clean synthesis gas obtaining is 1.0mg/Nm
3below, can not cause the obstruction of foam scrubber, technique is simple and convenient, can meet different industrial needs simultaneously.
The utility model is to solve above-mentioned technical problem by following technical proposals:
A stage purification equipment for dusty gas, described stage purification equipment comprises a spray column, a Venturi Scrubber, a separator and the foam scrubber connecting successively.
It will be understood by those skilled in the art that: in the utility model, described spray column can be independent spray column, also can also be the spray column of other device coupled with upstream process, described upstream process refers to the conventional upstream process of the process for purifying of this area dusty gas.
In the utility model, described spray column is the spray column of this area routine.Described spray column preferably comprises a spray column tower body, a spraying layer, a first liquid import, one first gas feed, one first gas vent and one first wastewater outlet.Preferably, described spraying layer is positioned at the top of described spray column tower body, and is connected with described first liquid import.Preferably, the first described gas feed and described first liquid import are all positioned at the side of described spray column tower body, and the first described gas feed is positioned at the below of described first liquid import.Preferably, the first described gas vent is positioned at the top of described spray column tower body.Preferably, the first described wastewater outlet is positioned at the bottom of described spray column tower body.
In the utility model, described Venturi Scrubber claims again Venturi scrubber.Described Venturi Scrubber is the Venturi Scrubber of this area routine.
Preferably, described Venturi Scrubber comprises a washing portion, a syngas tube, grey water pipe and an escape pipe.Preferably, described syngas tube is positioned at a side of described washing portion; Described escape pipe is positioned at another side of described washing portion; Described grey water pipe is positioned at the top of described washing portion; The water jet of described grey water pipe and described syngas tube are interconnected, in described syngas tube, be provided with a sleeve pipe, the water jet of described grey water pipe is relative with the air inlet of described sleeve pipe, and the water jet place described in the neighbour of described grey water pipe is provided with a cyclone; Described sleeve pipe comprises a convergent portion, a larynx neck and the flaring portion being connected successively along airflow direction, the bore of described convergent portion reduces gradually along airflow direction, described larynx neck is hollow cylindrical, and the bore of described flaring portion increases gradually along airflow direction.
More preferably, the diameter of described syngas tube is D, and the diameter D of described syngas tube is 300-800mm.The water jet of described grey water pipe is more preferably 0.1D～0.2D apart from the length H1 of described larynx neck, is more preferably further 0.15D.The length H2 of described larynx neck is more preferably 0.1D～0.2D, is more preferably further 0.15D.The distance H 3 of the water jet of the grey water pipe that described cyclone distance is described is more preferably 0.1D～0.2D, is more preferably further 0.15D.The length H4 of described flaring portion is more preferably 0.5D～4.2D, is more preferably further 2.5D.The diameter D1 of described larynx neck is more preferably 0.2D～0.5D, is more preferably further 0.3D.
The angle of throat α of described convergent portion is more preferably 20 °-60 °, is further more preferably 37 °; The extended corner β of described flaring portion is more preferably 5 °-30 °, is further more preferably 10 °.
In the utility model, described separator is the separator of this area routine, is preferably cyclone separator.Described separator preferably comprises a separation unit, one second gas feed, one second gas vent and one second wastewater outlet.Preferably, the second described gas feed is positioned at the side of described separation unit.Preferably, the second described gas vent is positioned at the top of described separation unit.Preferably, the second described wastewater outlet is positioned at the bottom of described separation unit.
In the utility model, described foam scrubber is the foam scrubber of this area routine.Preferably, described foam scrubber comprises a scrubbing tower, one the 3rd gas feed, one the 3rd gas vent, one the 3rd liquid-inlet, one the 3rd wastewater outlet and a reservoir.Preferably, the 3rd described gas feed is positioned at the side of described scrubbing tower.Preferably, the 3rd described liquid-inlet is positioned at the side of described scrubbing tower.More preferably, the 3rd described gas feed and the 3rd described gas vent lay respectively at the both sides of the opposition of described scrubbing tower.Preferably, the 3rd described gas vent is positioned at the top of described scrubbing tower.Preferably, described reservoir is positioned at the bottom of described scrubbing tower.Preferably, the 3rd described wastewater outlet is positioned at the bottom of described scrubbing tower, and is connected with described reservoir.
In the utility model, described foam scrubber is preferably foam scrubber claimed in Chinese patent CN203128516U.Foam scrubber claimed in this patent is all applicable to the utility model.
As of the present utility model one example preferably: in described scrubbing tower, layer communicates with each other every being provided with successively from top to bottom: a demister of carrying secretly for removing drop, the spraying layer that a first paragraph column plate layer and that carries out fine purifiation for realizing gas-liquid contact is slightly washed for gas-liquid contact; The upright position of the 3rd described gas feed is between described spraying layer and described reservoir; The upright position of the 3rd described liquid-inlet is between described demister and described first paragraph column plate layer.
As a better example of the present utility model: in described scrubbing tower, layer communicates with each other every being provided with successively from top to bottom: a demister of carrying secretly for removing drop, one carries out the first paragraph column plate layer of fine purifiation, a spraying layer of slightly washing for gas-liquid contact for the second segment column plate layer and of inferior fine purifiation for realizing gas-liquid contact; The upright position of the 3rd described gas feed is between described spraying layer and described reservoir; The upright position of the 3rd described liquid-inlet is between described demister and described first paragraph column plate layer; Described first paragraph column plate layer, second segment column plate layer and spraying layer communicate.
In the utility model, the first gas vent of described spray column is connected with the import of the syngas tube of described Venturi Scrubber, the escape pipe of described Venturi Scrubber is connected with the second gas feed of described separator, and the second gas vent of described separator is connected with the 3rd gas feed of described foam scrubber.
Those skilled in the art all it is to be understood that, in the utility model, the connection between each equipment is generally by pipeline and is communicated with.
Described stage purification equipment preferably also comprises a water circulating pump.Described water circulating pump is connected with the reservoir of described foam scrubber.
In the utility model, the technique of the stage purification method of described dusty gas is as described below:
(1) pending gas passes into described spray column, in the spray space in described spray column, with water counter current contacting, described pending gas is lowered the temperature, dehumidification and purification, and thin ash particle wherein, under the effect of the water of specific temperature and consumption, coalescence increases, and meanwhile, water is warmed;
(2) after washing, process gas at the beginning of the first gas outlet of described spray column obtains, described first processing gas is dust-laden saturated gas; Described first processing gas enters described Venturi Scrubber by pipeline; In described Venturi Scrubber, again contact mixing with water, under the effect of the water of specific temperature and consumption, described first processing gas is further lowered the temperature, form gas-liquid-solid mixture, the further coalescence of thin ash particle wherein and being increased by water-wet, containing;
(3) described gas-liquid-solid mixture enters described separator by pipeline, under the effect of centrifugal force, realizes the separated of gas and liquid-solid body, further purify, process again gas; The described gas of processing is again dust-laden saturated gas;
(4) the described gas of processing again enters foam scrubber by pipeline, washing; Described washing is: described processes again gas and washings reverse flow, and by bubbling, contacts on tower tray.
Meeting on the basis of this area general knowledge, above-mentioned each optimum condition, can be combined, and obtains each preferred embodiments of the utility model.
Positive progressive effect of the present utility model is:
(1) the stage purification method of dusty gas of the present utility model combines the characteristic distributions of thin ash in dusty gas, the washing and purifying method step by step that adopts " rough segmentation " and " fine purifiation " to combine has effectively improved detersive efficiency when reducing equipment for washing purification load;
(2) the stage purification equipment of dusty gas of the present utility model has improved the removal efficiency that is less than 1 μ m ultra-fine grain in dusty gas greatly, and removal efficiency reaches more than 95%, and the content of processing the thin ash in the clean synthesis gas obtaining is 1mg/Nm
3below, realized the deep purifying containing ultra-fine ash (<1 μ m) the high dusty gas stronger than great and thin grey hydrophobicity;
(3) the stage purification method of dusty gas of the present utility model can not cause the obstruction of foam scrubber, and technique is simple and convenient, can meet different industrial needs, has more promoted stable, the reliable and long-term operation of commercial plant.
Accompanying drawing explanation
Fig. 1 is the structure chart of stage purification equipment of the dusty gas of embodiment 1-3.
Fig. 2 is the cutaway view of the Venturi Scrubber 2 in Fig. 1.
Fig. 3 is the enlarged drawing of the A portion of the Venturi Scrubber 2 shown in Fig. 2.
The specific embodiment
Lift a preferred embodiment below, and carry out by reference to the accompanying drawings the clearer the utility model that intactly illustrates.
Embodiment 1
A stage purification equipment for dusty gas, as shown in Figure 1: this equipment comprises a spray column 1, a Venturi Scrubber 2, a separator 3, a foam scrubber 4 and the water circulating pump 5 connecting successively;
(1) spray column:
This spray column 1 can be independent spray column, can also be also the spray column with other device coupled of upstream process;
This spray column 1 comprises a spray column tower body 10, a spraying layer 13, a first liquid import 11, one first gas feed 12, one first gas vent 14 and one first wastewater outlet 15; This spraying layer 13 is positioned at the top of this spray column 1, and is connected with this first liquid import 11; This first gas feed 12 and this first liquid import 11 are all positioned at the side of this spray column tower body 10, and this first gas feed 12 is positioned at the below of this first liquid import 11; This first gas vent 14 is positioned at the top of this spray column tower body 10; This first wastewater outlet 15 is positioned at the bottom of this spray column tower body 10;
(2) Venturi Scrubber (Venturi scrubber):
This Venturi Scrubber 2 comprises a washing portion 20, syngas tube 21, grey water pipe 22 and an escape pipe 25; This syngas tube 21 is positioned at a side of this washing portion 20; This escape pipe 25 is positioned at another side of this washing portion 20; This ash water pipe 22 is positioned at the top of this washing portion 20;
(3) cyclone separator:
This cyclone separator 3 comprises a separation unit 30, one second gas feed 31, one second gas vent 32 and one second wastewater outlet 33; This second gas feed 31 is positioned at the side of this separation unit 30; This second gas vent 32 is positioned at the top of this separation unit 30; This second wastewater outlet 33 is positioned at the bottom of this separation unit 30;
(4) foam scrubber:
This foam scrubber 4 comprises a scrubbing tower 40, one the 3rd gas feed 41, one the 3rd gas vent 42, one the 3rd liquid-inlet 43, one the 3rd wastewater outlet 44 and reservoir 45; The 3rd gas feed 41 is positioned at the side of this scrubbing tower 40; The 3rd liquid-inlet 73 is positioned at another side of this scrubbing tower 40; The 3rd gas vent 42 is positioned at the top of this scrubbing tower 40; This reservoir 45 is positioned at the bottom of this scrubbing tower 40, and the 3rd wastewater outlet 44 is positioned at the bottom of this scrubbing tower 40, and is connected with this reservoir 45;
(5) the first gas vent 14 of this spray column 1 is connected with the import of the syngas tube 21 of this Venturi Scrubber 2, the escape pipe 25 of this Venturi Scrubber 2 is connected with the second gas feed 31 of this separator 3, and the second gas vent 32 of this separator 3 is connected with the 3rd gas feed 41 of this foam scrubber 4 by pipeline; This water circulating pump 5 is connected with the reservoir of this foam scrubber 4;
Connection between above-mentioned each equipment is by pipeline and connects.
Utilize this equipment to carry out the stage purification of dusty gas, in this technique, spray column 1 and the equal adopting process of Venturi Scrubber 2 are purified waste water as washings, and foam scrubber 4 adopting process condensed waters and technique are purified waste water as washings;
This stage purification technique comprises the following steps:
(1) pending gas (dusty gas) is passed through to the first gas feed 12 of spray column 1, pass in the spray column tower body 10 of spray column 1, simultaneously, first liquid import 11 by washings by spray column 1 passes in spraying layer 13, washings and pending gas (dusty gas) are in the interior counter current contacting of spray column tower body 10 of spray column 1, pending gas is lowered the temperature, dehumidification, purification, foam removal, obtains just process gas at the first gas vent 14 places of spray column 1; Washings are warmed and become containing grey waste water because having trapped thin ash particle, from the first wastewater outlet 15, discharge;
Wherein, the amount of the washings in spray column 1 is 50m
3/ h, water and the liquid gas volume ratio 5.77L/m that enters the dusty gas of spray column 1
3, the temperature of water is lower 74 ℃ than the temperature of pending gas;
(2) just process gas through pipeline, pass into the syngas tube 21 of Venturi Scrubber 2, enter in the washing portion 20 of Venturi Scrubber 2, washings are fed in Venturi Scrubber 2 by the grey water pipe 22 from washer 2, just process the further coalescence of gas and are washed water-wet, containing and increase; In Venturi Scrubber 2, obtain the gas-liquid-solid mixture mixing, this gas-liquid-solid mixture is discharged from escape pipe 25;
Wherein, the amount of the washings in Venturi Scrubber 2 is 40m
3/ h, with the liquid gas volume ratio 5.03L/m of first processing gas
3, the temperature of the water in Venturi Scrubber 2 is lower 71 ℃ than the temperature of just processing gas;
(3) this gas-liquid-solid mixture is through pipeline, and the second gas feed 31 through cyclone separator 3, enters in the separation unit 30 of cyclone separator 3, separated under the effect of centrifugal force, at the second gas vent 32 places of cyclone separator 3, obtains and processes gas again; Discharging from the second wastewater outlet 33 containing grey waste water after separation;
(4) this processes gas again, pass through pipeline, by the 3rd gas feed 41 of foam scrubber 4, enter in the scrubbing tower 40 of foam scrubber 4, washings enter from the 3rd liquid-inlet 43 in the scrubbing tower 40 of foam scrubber 4, and wherein, process condensate water adds from the import of the top portion of the 3rd liquid-inlet 43 of foam scrubber 4, the import that technique is purified waste water is more lower slightly than the entrance location of process condensate water, from the import of the portion on the lower of the 3rd liquid-inlet 43 of foam scrubber 4, adds; Washing, obtains clean synthesis gas, from the 3rd gas vent 42, gets rid of; What washing produced enters reservoir 45 containing grey waste water, through gravitational settling rear section, from the 3rd wastewater outlet 44, discharges;
Wherein, the amount of the process condensate water of foam scrubber 4 is 69m
3it is 168m that/h, technique purify the water yield
3/ h, the temperature of process condensate water is lower 66 ℃ than the temperature of processing again gas, and the temperature that technique purifies the water yield is lower 68 ℃ than the temperature of processing again gas;
(5) from the 3rd wastewater outlet 44 of the first wastewater outlet 15 of spray column 1, the second wastewater outlet 33 of cyclone separator 3 and foam scrubber 4, discharge containing grey waste water, respectively through pipeline, import containing grey water treatment system and be further processed; Should import containing grey water treatment system containing grey waste line; At this, containing in grey water treatment system, step-down flash distillation, is further concentrated containing the solid particle in grey waste water, containing the waste water in grey waste water, is constantly clarified, and heat is recovered simultaneously.After clarification cooling, buck can return in technique, as the technique use of purifying waste water;
Water circulating pump 5 is connected by pipeline with the reservoir 45 of foam scrubber 4, the part buck after gravitational settling in reservoir 45 is extracted by water circulating pump 5, enter circulating line, enter into afterwards the shock chamber that enters gasification furnace by chilling ring, this recirculated water can, for carrying out Quench to going out the high-temperature gas of gasification furnace, also have the effect of preliminary washing gas simultaneously.
Embodiment 2
A stage purification equipment for dusty gas, as shown in Figure 1: this stage purification equipment comprises a spray column 1, a Venturi Scrubber 2, a separator 3, a foam scrubber 4 and the water circulating pump 5 connecting successively;
(1) spray column:
This spray column 1 can be independent spray column, can also be also the spray column with other device coupled of upstream process;
This spray column 1 comprises a spray column tower body 10, a spraying layer 13, a first liquid import 11, one first gas feed 12, one first gas vent 14 and one first wastewater outlet 15; This spraying layer 13 is positioned at the top of this spray column 1, and is connected with this first liquid import 11; This first gas feed 12 and this first liquid import 11 are all positioned at the side of this spray column tower body 10, and this first gas feed 12 is positioned at the below of this first liquid import 11; This first gas vent 14 is positioned at the top of this spray column tower body 10; This first wastewater outlet 15 is positioned at the bottom of this spray column tower body 10;
(2) Venturi Scrubber (Venturi scrubber):
This Venturi Scrubber 2 comprises a washing portion 20, syngas tube 21, grey water pipe 22 and an escape pipe 25; This syngas tube 21 is positioned at a side of this washing portion 20; This escape pipe 25 is positioned at another side of this washing portion 20; This ash water pipe 22 is positioned at the top of this washing portion 20;
The cutaway view of this Venturi Scrubber 2 as shown in Figure 2, in Fig. 2, the enlarged drawing of A portion as shown in Figure 3, in conjunction with Fig. 2 and Fig. 3: the water jet of this ash water pipe 22 and this syngas tube 21 are interconnected, in this syngas tube 21, be provided with a sleeve pipe 24, the water jet of this ash water pipe 22 is relative with the air inlet of this sleeve pipe 24, and this water jet place of the neighbour of this ash water pipe 22 is provided with a cyclone 23; This sleeve pipe 24 comprises successively the convergent portion 241 being connected, larynx neck 242 and a flaring portion 243 along airflow direction, the bore of this convergent portion 241 reduces gradually along airflow direction, this larynx neck 242 is hollow cylindrical, and the bore of this flaring portion 243 increases gradually along airflow direction;
The diameter of this syngas tube 21 is D, and the diameter D of this syngas tube 21 is 300-800mm; The water jet of this ash water pipe 22 is 0.15D apart from the length H1 of this larynx neck 242; The length H2 of this larynx neck 242 is 0.15D; This cyclone 23 is 0.15D apart from the distance H 3 of the water jet of this ash water pipe 22; The diameter D1 of this larynx neck 242 is 0.3D; The length H4 of this flaring portion 243 is 2.5D; The angle of throat α of this convergent portion 241 is 37 °, and the extended corner β of this flaring portion 243 is 10 °;
(3) cyclone separator:
This cyclone separator 3 comprises a separation unit 30, one second gas feed 31, one second gas vent 32 and one second wastewater outlet 33; This second gas feed 31 is positioned at the side of this separation unit 30; This second gas vent 32 is positioned at the top of this separation unit 30; This second wastewater outlet 33 is positioned at the bottom of this separation unit 30;
(4) foam scrubber:
In this embodiment, this foam scrubber is the foam scrubber in disclosed embodiment 1 in Chinese patent CN203128516U; Particularly, this foam scrubber 4 comprises a scrubbing tower 40, one the 3rd gas feed 41, one the 3rd gas vent 42, one the 3rd liquid-inlet 43, one the 3rd wastewater outlet 44 and reservoir 45; The 3rd gas feed 41 is positioned at the side of this scrubbing tower 40; The 3rd liquid-inlet 73 is positioned at another side of this scrubbing tower 40; The 3rd gas vent 42 is positioned at the top of this scrubbing tower 40; This reservoir 45 is positioned at the bottom of this scrubbing tower 40, and the 3rd wastewater outlet 44 is positioned at the bottom of this scrubbing tower 40, and is connected with this reservoir 45;
In this scrubbing tower 40, layer communicates with each other every being provided with successively from top to bottom: a demister of carrying secretly for removing drop, the spraying layer that a first paragraph column plate layer and that carries out fine purifiation for realizing gas-liquid contact is slightly washed for gas-liquid contact; The upright position of the 3rd gas feed 41 is between this spraying layer and this reservoir 45; The upright position of the 3rd liquid-inlet 43 is between this demister and this first paragraph column plate layer;
Specifically referring to the embodiment 1 in Chinese patent CN203128516U and accompanying drawing 1;
(5) the first gas vent 14 of this spray column 1 is connected with the import of the syngas tube 21 of this Venturi Scrubber 2, the escape pipe 25 of this Venturi Scrubber 2 is connected with the second gas feed 31 of this separator 3, and the second gas vent 32 of this separator 3 is connected with the 3rd gas feed 41 of this foam scrubber 4 by pipeline; This water circulating pump 5 is connected with the reservoir of this foam scrubber 4; Connection between each equipment is by pipeline and connects.
Utilize this equipment to carry out the stage purification technique of dusty gas, processing step is with embodiment 1.
Embodiment 3
A stage purification equipment for dusty gas, as shown in Figure 1: this stage purification equipment comprises a spray column 1, a Venturi Scrubber 2, a separator 3, a foam scrubber 4 and the water circulating pump 5 connecting successively;
(1) spray column:
This spray column 1 can be independent spray column, can also be also the spray column with other device coupled of upstream process;
This spray column 1 comprises a spray column tower body 10, a spraying layer 13, a first liquid import 11, one first gas feed 12, one first gas vent 14 and one first wastewater outlet 15; This spraying layer 13 is positioned at the top of this spray column 1, and is connected with this first liquid import 11; This first gas feed 12 and this first liquid import 11 are all positioned at the side of this spray column tower body 10, and this first gas feed 12 is positioned at the below of this first liquid import 11; This first gas vent 14 is positioned at the top of this spray column tower body 10; This first wastewater outlet 15 is positioned at the bottom of this spray column tower body 10;
(2) Venturi Scrubber (Venturi scrubber):
This Venturi Scrubber 2 comprises a washing portion 20, syngas tube 21, grey water pipe 22 and an escape pipe 25; This syngas tube 21 is positioned at a side of this washing portion 20; This escape pipe 25 is positioned at another side of this washing portion 20; This ash water pipe 22 is positioned at the top of this washing portion 20;
The cutaway view of this Venturi Scrubber 2 as shown in Figure 2, in Fig. 2, the enlarged drawing of A portion as shown in Figure 3, in conjunction with Fig. 2 and Fig. 3: the water jet of this ash water pipe 22 and this syngas tube 21 are interconnected, in this syngas tube 21, be provided with a sleeve pipe 24, the water jet of this ash water pipe 22 is relative with the air inlet of this sleeve pipe 24, and this water jet place of the neighbour of this ash water pipe 22 is provided with a cyclone 23; This sleeve pipe 24 comprises successively the convergent portion 241 being connected, larynx neck 242 and a flaring portion 243 along airflow direction, the bore of this convergent portion 241 reduces gradually along airflow direction, this larynx neck 242 is hollow cylindrical, and the bore of this flaring portion 243 increases gradually along airflow direction;
The diameter of this syngas tube 21 is D, and the diameter D of this syngas tube 21 is 300-800mm; The water jet of this ash water pipe 22 is 0.15D apart from the length H1 of this larynx neck 242; The length H2 of this larynx neck 242 is 0.15D; This cyclone 23 is 0.15D apart from the distance H 3 of the water jet of this ash water pipe 22; The diameter D1 of this larynx neck 242 is 0.3D; The length H4 of this flaring portion 243 is 2.5D; The angle of throat α of this convergent portion 241 is 37 °, and the extended corner β of this flaring portion 243 is 10 °;
(3) cyclone separator:
This cyclone separator 3 comprises a separation unit 30, one second gas feed 31, one second gas vent 32 and one second wastewater outlet 33; This second gas feed 31 is positioned at the side of this separation unit 30; This second gas vent 32 is positioned at the top of this separation unit 30; This second wastewater outlet 33 is positioned at the bottom of this separation unit 30;
(4) foam scrubber:
In this embodiment, this foam scrubber is the foam scrubber in disclosed embodiment 2 in Chinese patent CN203128516U; Particularly, this foam scrubber 4 comprises a scrubbing tower 40, one the 3rd gas feed 41, one the 3rd gas vent 42, one the 3rd liquid-inlet 43, one the 3rd wastewater outlet 44 and reservoir 45; The 3rd gas feed 41 is positioned at the side of this scrubbing tower 40; The 3rd liquid-inlet 73 is positioned at another side of this scrubbing tower 40; The 3rd gas vent 42 is positioned at the top of this scrubbing tower 40; This reservoir 45 is positioned at the bottom of this scrubbing tower 40, and the 3rd wastewater outlet 44 is positioned at the bottom of this scrubbing tower 40, and is connected with this reservoir 45;
In this scrubbing tower in 40 from top to bottom successively layer every being provided with, communicate with each other: a demister of carrying secretly for removing drop, one carries out the first paragraph column plate layer of fine purifiation, a spraying layer of slightly washing for gas-liquid contact for the second segment column plate layer and of inferior fine purifiation for realizing gas-liquid contact; The upright position of the 3rd gas feed 41 is between this spraying layer and this reservoir 45; The upright position of the 3rd liquid-inlet 43 is between this demister and this first paragraph column plate layer; This first paragraph column plate layer, second segment column plate layer and spraying layer communicate; Specifically referring to the embodiment 2 in Chinese patent CN203128516U and accompanying drawing 2;
(5) the first gas vent 14 of this spray column 1 is connected with the import of the syngas tube 21 of this Venturi Scrubber 2, the escape pipe 25 of this Venturi Scrubber 2 is connected with the second gas feed 31 of this separator 3, and the second gas vent 32 of this separator 3 is connected with the 3rd gas feed 41 of this foam scrubber 4 by pipeline; This water circulating pump 5 is connected with the reservoir of this foam scrubber 4;
Connection between above-mentioned each equipment is by pipeline and connects.
Utilize this equipment to carry out the stage purification technique of dusty gas, processing step is with embodiment 1.
Effect embodiment 1
One day was processed the powdered coal pressuring gasified device of Quench type of 1000 tons of coals, and coal ash is divided into 27%, and vapor pressure is 4.0MPa, gasification temperature is 1550 ℃, goes out the high-temperature gas of vaporizer after water Quench, and temperature is 221 ℃, relative pressure is 3.98MPa, and flow is 8673m
3/ h, in gas, thin ash content is 72g/m
3.
Result: be 72g/m containing thin ash amount
3high dusty gas after this wet classification washing, purifying, the clean synthesis gas of discharging from foam scrubber 4, thin ash content is 0.8mg/Nm
3, the removal efficiency that is less than 1 μ m ultra-fine grain in this dusty gas can be up to more than 98%, the fine requirement that meets lower procedure of energy, and foam scrubber 4 does not stop up.
Claims (7)
1. a stage purification equipment for dusty gas, is characterized in that: described stage purification equipment comprises a spray column, a Venturi Scrubber, a separator and the foam scrubber connecting successively;
Described Venturi Scrubber comprises a washing portion, a syngas tube, grey water pipe and an escape pipe; Described syngas tube is connected with described spray column, and described escape pipe is connected with described separator; Described syngas tube is positioned at a side of described washing portion; Described escape pipe is positioned at another side of described washing portion; Described grey water pipe is positioned at the top of described washing portion;
Described spray column comprises a spray column tower body, a spraying layer, a first liquid import, one first gas feed, one first gas vent and one first wastewater outlet; Described spraying layer is positioned at the top of described spray column tower body, and is connected with described first liquid import; The first described gas feed and described first liquid import are all positioned at the side of described spray column tower body, and the first described gas feed is positioned at the below of described first liquid import; The first described gas vent is positioned at the top of described spray column tower body; The first described wastewater outlet is positioned at the bottom of described spray column tower body; The first described gas vent is connected with described Venturi Scrubber;
Described separator comprises a separation unit, one second gas feed, one second gas vent and one second wastewater outlet; The second described gas feed is positioned at the side of described separation unit; The second described gas vent is positioned at the top of described separation unit; The second described wastewater outlet is positioned at the bottom of described separation unit; The second described gas feed is connected with described Venturi Scrubber; The second described gas vent is connected with described foam scrubber;
Described foam scrubber comprises a scrubbing tower, one the 3rd gas feed, one the 3rd gas vent, one the 3rd liquid-inlet, one the 3rd wastewater outlet and a reservoir; The 3rd described gas feed is positioned at the side of described scrubbing tower; The 3rd described liquid-inlet is positioned at the side of described scrubbing tower; The 3rd described gas vent is positioned at the top of described scrubbing tower; Described reservoir is positioned at the bottom of described scrubbing tower; The 3rd described wastewater outlet is positioned at the bottom of described scrubbing tower, and is connected with described reservoir; The 3rd described gas feed is connected with described separator.
2. stage purification equipment as claimed in claim 1, it is characterized in that: the water jet of described grey water pipe and described syngas tube are interconnected, in described syngas tube, be provided with a sleeve pipe, the water jet of described grey water pipe is relative with the air inlet of described sleeve pipe, and the water jet place described in the neighbour of described grey water pipe is provided with a cyclone; Described sleeve pipe comprises a convergent portion, a larynx neck and the flaring portion being connected successively along airflow direction, the bore of described convergent portion reduces gradually along airflow direction, described larynx neck is hollow cylindrical, and the bore of described flaring portion increases gradually along airflow direction.
3. stage purification equipment as claimed in claim 2, it is characterized in that: the diameter of described syngas tube is D, and the diameter D of described syngas tube is 300-800mm; The water jet of described grey water pipe is 0.1D～0.2D apart from the length H1 of described larynx neck; The length H2 of described larynx neck is 0.1D～0.2D; The distance H 3 of the water jet of the grey water pipe that described cyclone distance is described is 0.1D～0.2D; The length H4 of described flaring portion is 0.5D～4.2D; The diameter D1 of described larynx neck is 0.2D～0.5D; The angle of throat α of described convergent portion is 20 °-60 °; The extended corner β of described flaring portion is 5 °-30 °.
4. the stage purification equipment as described in any one in claim 1-3, is characterized in that: described spray column is independent spray column, or with the spray column of upstream process device coupled.
5. stage purification equipment as claimed in claim 1, it is characterized in that: in described scrubbing tower, layer communicates with each other every being provided with successively from top to bottom: a demister of carrying secretly for removing drop, the spraying layer that a first paragraph column plate layer and that carries out fine purifiation for realizing gas-liquid contact is slightly washed for gas-liquid contact; The upright position of the 3rd described gas feed is between described spraying layer and described reservoir; The upright position of the 3rd described liquid-inlet is between described demister and described first paragraph column plate layer.
6. stage purification equipment as claimed in claim 1, it is characterized in that: in described scrubbing tower, layer communicates with each other every being provided with successively from top to bottom: a demister of carrying secretly for removing drop, one carries out the first paragraph column plate layer of fine purifiation, a spraying layer of slightly washing for gas-liquid contact for the second segment column plate layer and of inferior fine purifiation for realizing gas-liquid contact; The upright position of the 3rd described gas feed is between described spraying layer and described reservoir; The upright position of the 3rd described liquid-inlet is between described demister and described first paragraph column plate layer; Described first paragraph column plate layer, second segment column plate layer and spraying layer communicate.
7. stage purification equipment as claimed in claim 1, is characterized in that: described stage purification equipment also comprises a water circulating pump; Described water circulating pump is connected with the reservoir of described foam scrubber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320777728.6U CN203777862U (en) | 2013-11-29 | 2013-11-29 | Multi-stage purification device for dusty gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320777728.6U CN203777862U (en) | 2013-11-29 | 2013-11-29 | Multi-stage purification device for dusty gas |
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| CN203777862U true CN203777862U (en) | 2014-08-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531230A (en) * | 2014-12-09 | 2015-04-22 | 贵州开阳化工有限公司 | High-efficiency energy-saving water gas purification device |
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2013
- 2013-11-29 CN CN201320777728.6U patent/CN203777862U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531230A (en) * | 2014-12-09 | 2015-04-22 | 贵州开阳化工有限公司 | High-efficiency energy-saving water gas purification device |
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