CN202146708U - Flue gas desulfurization system - Google Patents

Flue gas desulfurization system Download PDF

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Publication number
CN202146708U
CN202146708U CN201120259853U CN201120259853U CN202146708U CN 202146708 U CN202146708 U CN 202146708U CN 201120259853 U CN201120259853 U CN 201120259853U CN 201120259853 U CN201120259853 U CN 201120259853U CN 202146708 U CN202146708 U CN 202146708U
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CN
China
Prior art keywords
flue gas
solution
cylindrical shell
jut
base plate
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Expired - Fee Related
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CN201120259853U
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Chinese (zh)
Inventor
李先才
邱正秋
罗义文
任毅
骆武军
邓中明
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Pangang Group Research Institute Co Ltd
Pangang Group Panzhihua Steel and Vanadium Co Ltd
Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Pangang Group Co Ltd
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Pangang Group Research Institute Co Ltd
Pangang Group Panzhihua Steel and Vanadium Co Ltd
Pangang Group Co Ltd
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Priority to CN201120259853U priority Critical patent/CN202146708U/en
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Publication of CN202146708U publication Critical patent/CN202146708U/en
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Abstract

The utility model provides a flue gas desulfurization system so as to solve a series of problems in the existing desulfurization system that the content of suspended impurities in desulfurization solution is high, the system is blocked, the desulfurization rate is low and the like. The flue gas desulfurization system comprises a flue gas washing section, an absorbing section and a desulfurization solution trapping section that are sequentially arranged along the flowing direction of flue gas. The flue gas desulfurization system is available to have at least one of the following technical effects: reducing the suspended impurities in desulfurization solution and preventing blocking caused by filler; improving the desulfurization rate; being beneficial to overcome the defect that all rich liquor is sent to be desorbed; being beneficial to the recovery of the desulfurization solution; and being beneficial to the reduction of energy consumption.

Description

A kind of flue gas desulphurization system
Technical field
The utility model relates to the technical field that removes sulfur in smoke, particularly a kind of flue gas desulphurization system.
Background technology
In a kind of existing flue gas desulfurization technique; Utilize amine liquid to absorb sulfur in smoke; And in the high temperature desorption process, the amine liquid that has absorbed sulfur dioxide is carried out desorb; Obtain the sulfur dioxide gas of higher degree, and make amine liquid recover to absorb the ability of sulfur dioxide in flue gas, amine liquid can recycle.
At present, also have a kind of process of ionic liquid desulfurization, the process of this technology is similar basically with the process of above-mentioned amine method sulfur removal technology.Both differences are that desulfurization absorption liquid component is different, the ability basically identical of its absorbing sulfur dioxide.The ionic liquid sulfur removal technology generally includes one-level and absorbs and one-level desorb (desorb is promptly regenerated), and under the big situation of dust content, adopts flue gas prewashing technology.In addition, in existing ionic liquid sulfur removal technology, adopt the prior resin desalinating process to carry out the recovery of desulfuration solution.
In existing sulfur removal technology, there are a series of problems such as suspended impurity content height in the desulfuration solution, system jams, desulfurization degree be low.
The utility model content
The purpose of the utility model is to provide the flue gas desulphurization system of at least one technical problem in a kind of can the solving the problems of the technologies described above.
Flue gas desulphurization system according to the utility model comprises that the flue gas washing section, absorber portion, the desulfuration solution that set gradually along the flow of flue gas direction capture section.
One side according to the utility model; Said system also comprises the flue dedusting section that is arranged on the upper reaches of flue gas washing section along the flow of flue gas direction; Said system has cylindrical shell, and flue dedusting section comprises booster fan and the flue that is successively set on the cylindrical shell outside along the flow of flue gas direction.
According to the one side of the utility model, said flue is S shape flue, T shape flue or their combination.
One side according to the utility model; Said system has cylindrical shell, the flue gas washing section comprise along the flow of flue gas direction set gradually with lower component: be arranged on the smoke inlet on the cylindrical shell and be arranged on first spray thrower, first packing layer, first liquid distribution trough, second spray thrower in the cylindrical shell.
One side according to the utility model; The flue gas washing section comprises that also first cleaning solution that is connected to first spray thrower and is arranged on the cylindrical shell enters the mouth, is connected to second spray thrower and is arranged on second cleaning solution inlet on the cylindrical shell; And being arranged on the outside washing liquor tank of cylindrical shell, first cleaning solution inlet and second cleaning solution inlet are connected to washing liquor tank.
According to the one side of the utility model, the flue gas washing section also comprises cleaning solution outlet and the sludge outlet that is arranged on first spray thrower below, and sludge outlet is positioned at the below of cleaning solution outlet, and the cleaning solution outlet is connected to washing liquor tank.
According to the one side of the utility model, the flue gas washing section also comprises sludge settling equipment that is arranged between cleaning solution outlet and the sludge outlet and the mud discharging device that is arranged on the sludge settling equipment below.
According to the one side of the utility model, the flue gas washing section also comprises the demister that is positioned at the second spray thrower downstream along the flow of flue gas direction.
According to the one side of the utility model, the flue gas washing section also comprises second liquid distribution trough that is arranged on the upper reaches of first spray thrower along the flow of flue gas direction.
One side according to the utility model; Said system has cylindrical shell, absorber portion comprise along the flow of flue gas direction be successively set in the cylindrical shell with lower component: first dividing plate, first flue gas rise gas hood, second packing layer, second liquid distribution trough, the 3rd packing layer, the 3rd liquid distribution trough; First dividing plate comprises base plate and jut, and the outward flange of base plate engages with the inner wall sealing of cylindrical shell, and base plate has intermediate openings, jut from the edge with intermediate openings of base plate to upper process; First flue gas rises the jut that gas hood covers first dividing plate, and first flue gas outward flange that rises gas hood exceeds the periphery of the jut of first dividing plate; First flue gas rises between the top edge of jut of the gas hood and first dividing plate and has certain distance.
One side according to the utility model; Absorber portion also comprises first lean solution inlet, second lean solution inlet and the rich solution outlet that is arranged on the cylindrical shell; First lean solution inlet is arranged on the upper reaches of second liquid distribution trough along the first lean solution flow direction; Second lean solution inlet is arranged on the upper reaches of the 3rd liquid distribution trough along the second lean solution flow direction; Rich solution outlet is arranged between first dividing plate and second packing layer and near the base plate of first dividing plate, the height that rich solution exports is lower than the height of the jut top edge of first dividing plate.
According to the one side of the utility model, the rich solution outlet is connected at least one in first lean solution inlet and second lean solution inlet through exterior line.
One side according to the utility model; Said system has cylindrical shell, absorber portion comprise along the flow of flue gas direction be successively set in the cylindrical shell with lower component: first dividing plate, first flue gas rise gas hood, the 3rd spray thrower, the 3rd packing layer, the 3rd liquid distribution trough; First dividing plate comprises base plate and jut, and the outward flange of base plate engages with the inner wall sealing of cylindrical shell, and base plate has intermediate openings, jut from the edge with intermediate openings of base plate to upper process; First flue gas rises the jut that gas hood covers first dividing plate, and first flue gas outward flange that rises gas hood exceeds the periphery of the jut of first dividing plate; First flue gas rises between the top edge of jut of the gas hood and first dividing plate and has certain distance.
One side according to the utility model; Absorber portion also comprises first lean solution inlet, second lean solution inlet and the rich solution outlet that is arranged on the cylindrical shell; First lean solution inlet is arranged on the upper reaches of the 3rd spray thrower along the first lean solution flow direction; Second lean solution inlet is arranged on the upper reaches of the 3rd liquid distribution trough along the second lean solution flow direction; Rich solution outlet is arranged between first dividing plate and the 3rd spray thrower and near the base plate of first dividing plate, the height that rich solution exports is lower than the height of the jut top edge of first dividing plate.
According to the one side of the utility model, the rich solution outlet is connected at least one in first lean solution inlet and second lean solution inlet through exterior line.
According to the one side of the utility model, absorber portion also comprises and is arranged on the 3rd spray thrower and first flue gas rises the liquid distribution trough between the gas hood.
According to the one side of the utility model, absorber portion also comprises the demister that is positioned at the 3rd liquid distribution trough downstream along the flow of flue gas direction.
According to the one side of the utility model, said system has cylindrical shell, desulfuration solution capture section comprise along the flow of flue gas direction be successively set in the cylindrical shell with lower component: second partition, second flue gas rise gas hood, the 4th packing layer, the 4th liquid distribution trough; Second partition comprises base plate and jut, and the outward flange of base plate engages with the inner wall sealing of cylindrical shell, and base plate has intermediate openings, jut from the edge with intermediate openings of base plate to upper process; Second flue gas rises the jut that gas hood covers second partition, and second flue gas outward flange that rises gas hood exceeds the periphery of the jut of second partition; Second flue gas rises between the top edge of jut of gas hood and second partition and has certain distance.
One side according to the utility model; Desulfuration solution captures section and also comprises trapping solution inlet and the trapping solution outlet that is arranged on the cylindrical shell; The trapping solution inlet is arranged on the upper reaches of the 4th liquid distribution trough along the trapping solution flow direction; Trapping solution outlet is arranged between second partition and the 4th packing layer and near the base plate of second partition, the height that trapping solution exports is lower than the height of the jut top edge of second partition.
According to the one side of the utility model, desulfuration solution captures section and also comprises the demister that is positioned at the 4th liquid distribution trough downstream along the flow of flue gas direction.
According to the one side of the utility model, said system has cylindrical shell, desulfuration solution capture section comprise along the flow of flue gas direction be successively set in the cylindrical shell with lower component: second partition, second flue gas rise gas hood, spray thrower; Second partition comprises base plate and jut, and the outward flange of base plate engages with the inner wall sealing of cylindrical shell, and base plate has intermediate openings, jut from the edge with intermediate openings of base plate to upper process; Second flue gas rises the jut that gas hood covers second partition, and second flue gas outward flange that rises gas hood exceeds the periphery of the jut of second partition; Second flue gas rises between the top edge of jut of gas hood and second partition and has certain distance.
One side according to the utility model; Desulfuration solution captures section and also comprises trapping solution inlet and the trapping solution outlet that is arranged on the cylindrical shell; The trapping solution inlet is arranged on the upper reaches of spray thrower along the trapping solution flow direction; Trapping solution outlet is arranged between second partition and the spray thrower and near the base plate of second partition, the height of trapping solution outlet is lower than the height of the jut top edge of second partition.
According to the one side of the utility model, desulfuration solution captures section and also comprises the demister that is positioned at the spray thrower downstream along the flow of flue gas direction.
According to the one side of the utility model, flue gas desulphurization system also comprises the demist section that is arranged on desulfuration solution capture section downstream along the flow of flue gas direction.
According to the one side of the utility model, said system has cylindrical shell, and the demist section comprises at least one demister that is arranged in the cylindrical shell.
Flue gas desulphurization system according to the utility model can have at least one in the following technique effect: the suspended impurity in the desulfuration solution is reduced in (1), and prevents the obstruction of filler; (2) can improve desulfurization degree; (3) help to overcome the deficiency that rich solution is all sent to desorb; The recovery of the desulfuration solution that (4) helps carrying secretly in the flue gas; (5) and the reduction that helps energy consumption.
Description of drawings
Fig. 1 is the structural representation according to a kind of flue gas desulphurization system of the utility model embodiment.
The specific embodiment
In this manual, sulfur-containing smoke gas to be desulfurization (hereafter is a flue gas) comprises at least a in sinter fume, metallurgical gas, the flue gas in power station boiler etc., and oxysulfide wherein mainly is a sulfur dioxide; But sulfur-containing smoke gas to be desulfurization is not limited thereto.In this manual; Desulfuration solution is meant the solution of the oxysulfide that is used for removing flue gas; The desulfuration solution that in absorption system, has absorbed oxysulfide is called rich solution; In desorption system, the oxysulfide in the rich solution is carried out the desulfuration solution that also can absorb oxysulfide once more that obtains after the removing of first degree and can be described as semi lean solution; In desorption system, the oxysulfide in the rich solution is carried out removing of second degree or the desulfuration solution that obtain after further removing and that can absorb oxysulfide once more of the oxysulfide in the semi lean solution can be described as lean solution, second degree is greater than first degree.Therefore, the oxysulfide content of semi lean solution is higher than the oxysulfide content of lean solution, i.e. the ability that the ability force rate semi lean solution of lean solution absorption oxysulfide absorbs oxysulfide is strong.In addition, according to the understanding of broad sense, the desulfuration solution of in desorption system, the oxysulfide in the rich solution being carried out to a certain degree that obtains afterwards and can absorb oxysulfide once more that removes all can be described as lean solution.
In this manual, the main absorbent components in the desulfuration solution promptly can absorb oxysulfide and can make the composition of oxysulfide desorb, can comprise at least a in amine liquid and the ionic liquid.In addition, desulfuration solution also can comprise at least a in activator and the water.Selectively, desulfuration solution can also comprise at least a in metal-precipitator and the surfactant.
With reference to Fig. 1, comprise that according to the flue gas desulphurization system 100 of the utility model embodiment the flue gas pretreatment section 110, absorber portion 120, the desulfuration solution that set gradually along the flow of flue gas direction capture section 130 and demist section 140.Sulfur-containing smoke gas captures section 130 and demist section 140 through flue gas pretreatment section 110, absorber portion 120, desulfuration solution successively, makes that the oxysulfide in the sulfur-containing smoke gas is removed.Flue gas pretreatment section 110 can be washed flue gas, to remove dust wherein.Absorber portion 120 can use semi lean solution further to adsorb dust in flue gas and absorb the oxysulfide in the flue gas, and can use lean solution to absorb the oxysulfide in the flue gas.Desulfuration solution captures section 130 and uses cleaning solution to capture the desulfuration solution of carrying secretly in the flue gas.140 pairs of flue gases of demist section carry out demist, thereby further reduce the desulfuration solution of carrying secretly in the flue gas.
Below in conjunction with Fig. 1 each parts according to the flue gas desulphurization system 100 of the utility model exemplary embodiment are described in detail with the flue gas desulfurization technique that uses flue gas desulphurization system 100 to realize.
Flue gas desulphurization system 100 has cylindrical shell 101.For example, cylindrical shell 101 can be cylinder.Flue gas pretreatment section 110, absorber portion 120, desulfuration solution capture section 130 and demist section 140 comprise separately be arranged on the cylindrical shell 101, in the cylindrical shell 101 and/or the outside corresponding assembly of cylindrical shell 101.
In one embodiment, flue gas pretreatment section 110 comprises the booster fan 111 and flue 112 that is successively set on cylindrical shell 101 outsides along the flow of flue gas direction.Flue gas pretreatment section 110 also comprises void tower washing section, padding washing section and the demister 118 that is successively set on cylindrical shell 101 inside along the flow of flue gas direction.Flue gas pretreatment section 110 also is included as the washing liquor tanks 119 that void tower washing section and padding washing section provide cleaning solution and receive cleaning solutions in the cylindrical shell 101.
Flue gas gets into flue 112 through after the supercharging of booster fan 111.Flue 112 can be S shape flue, T shape flue or their combination.Can be provided with one or more support columns in the S shape flue or roll over gas plate (not shown), thereby in the process of flue gas, change the flow direction of flue gas, increase contacting of flue gas and S shape flue, thereby increased the effect of settling of dust in the flue gas through S shape flue.
Next, the flue gas of having removed a part of dust can pass through smoke inlet 102 entering void tower washing sections.The void tower washing section can comprise first cleaning solution inlet 113 ' that is arranged on the cylindrical shell 101 and be arranged on first spray thrower 114 ' in the cylindrical shell 101.First cleaning solution inlet 113 ' is connected to first spray thrower 114 ' through internal duct, and receives cleaning solutions through exterior line from washing liquor tank 119, thereby cleaning solution is transported to first spray thrower 114 '.First spray thrower 114 ' is arranged on the top of smoke inlet 102, with towards with the direction spray washing liquid in the opposite direction of flow of flue gas.
First spray thrower 114 ' can be the spiral spray thrower.The spiral spray thrower helps overcoming the obstruction that dust causes.Only comprise a spray thrower though the void tower washing section has been shown among Fig. 1, the utility model is not limited thereto, and for example can comprise 2,3 or more spray thrower.Comprise at the void tower washing section under the situation of at least two spray throwers, be arranged on that the spray thrower of below can adopt metal shower nozzle (for example metal spiral shower nozzle), being arranged on, the spray thrower of the spray thrower top of below can adopt plastic nozzle.First spray thrower 114 ' can also be provided with compressed air, to realize spray more uniformly.
In another embodiment, can also liquid distribution trough be set in first spray thrower, 114 ' below.Liquid distribution trough distributes to the cleaning solution of first spray thrower, 114 ' ejection again, thereby improves the dust adsorption efficiency.
The padding washing section is arranged on the top of void tower washing section.The padding washing section comprises second cleaning solution inlet 113 that is arranged on the cylindrical shell 101 and is arranged on second spray thrower 114 in the cylindrical shell 101, first liquid distribution trough 115, first packing layer 116, the first packing layer supporting member 117.
Second cleaning solution inlet 113 is connected to second spray thrower 114 through internal duct, and receives cleaning solutions through exterior line from washing liquor tank 119, thereby cleaning solution is transported to second spray thrower 114.Second spray thrower 114 is arranged on first liquid distribution trough, 115 tops, with towards first liquid distribution trough, 115 spray washing liquid.
The below that first liquid distribution trough 115 is arranged on second spray thrower 114 to be admitting the cleaning solution of second spray thrower, 114 ejections, and the cleaning solution of 115 pairs of admittances of first liquid distribution trough distributes and is transported to first packing layer 116 with the cleaning solution after will distributing again.First packing layer 116 is arranged on first liquid distribution trough, 115 belows, and is supported by the first packing layer supporting member 117.First packing layer 116 can be in deflection plate regular plastic filler, the thread filler of wavy metal, the Pall ring dumped packing at least a, can structured packing be set again form first packing layer 116 through dumped packing is set in structured packing.First packing layer 116 makes the cleaning solution of portion's entering from it and the flue gas that gets into from its underpart fully contact, thereby removes dust in flue gas with cleaning solution.
Demister 118 is arranged on the top of padding washing section, is used to prevent or reduce that cleaning solution that flue gas is carried secretly gets into the absorber portion 120 of top.Though only show a demister 118 among Fig. 1, flue gas pretreatment section 110 can comprise at least two demisters that are arranged on padding washing section top.Demister 118 can be electrostatic precipitator, plastics deflection plate demister, woven wire ripple demister.Can also on demister 118, be provided with and clean the water pipe import.
Flue gas pretreatment section 110 also can comprise the cleaning solution subsider 106 that is arranged on void tower washing section below.Washed the dust that contains in the cleaning solution of flue gas at cleaning solution subsider 106 through sedimentations, obtain as the mud of lower floor with as the cleaning solution on upper strata.Cleaning solution subsider 106 can comprise the sludge outlet 104 that is arranged on the cylindrical shell 101 and cleaning solution outlet 105 and be arranged on sludge outlet 104 and cleaning solution outlet 105 between the sludge settling equipment (not shown), cleaning solution outlet 105 is arranged on the top of sludge outlet 104.Cleaning solution outlet 105 is connected to washing liquor tank 119, and the cleaning solution that washed flue gas is transported to washing liquor tank 119 through cleaning solution outlet 105.Sludge settling equipment is used for quickening the sedimentation of the mud that cleaning solution contains, and it can be known any sedimentation device, for example inclined plate settler.Below sludge settling equipment, also can be provided with mud discharging device (for example agitator) 107, be used for easily mud being discharged from sludge outlet 104.Because flue gas pretreatment section 110 also can comprise aforesaid cleaning solution subsider 106, so need not carry out independent desilt operation to a large amount of cleaning solutions that washed flue gas.
The cleaning solution that uses in the flue gas pretreatment section 110 can be the dilute aqueous solution of water (for example industrial soft water, desalted water) or desulfuration solution.
Therefore, have the dust that contains in 110 pairs of flue gases of flue gas pretreatment section of above-mentioned structure and adsorb, reduce the dust bring absorber portion 120 into, thereby reduce the suspended impurity in the desulfuration solution of absorber portion 120, and prevent the obstruction of the filler of absorber portion 120.In addition, flue gas pretreatment section 110 also possibly tentatively absorb the oxysulfide in the flue gas.
In one embodiment, absorber portion 120 comprises first absorber portion and second absorber portion that sets gradually along the flow of flue gas direction, absorbing carry out two-stage from the oxysulfide in the flue gas of flue gas pretreatment section 110, thereby improves desulfurization degree.
In one embodiment, first absorber portion comprise the first desulfuration solution lean solution (hereinafter referred the is first lean solution) inlet 121 ' that is arranged on the cylindrical shell 101 and rich solution outlet 127 and be arranged on the 3rd spray thrower 122 ' in the cylindrical shell 101, second liquid distribution trough 123 ', second packing layer 124 ', the second packing layer supporting member 125 ', first flue gas rises the gas hood 126 and first dividing plate 128.
First lean solution inlet 121 ' is connected to the 3rd spray thrower 122 ' through internal duct, and receives first lean solution through exterior line from desorption system, thereby will be transported to the 3rd spray thrower 122 ' from first lean solution that desorption system provides.The 3rd spray thrower 122 ' is arranged on second liquid distribution trough, 123 ' top, to spray first lean solution towards second liquid distribution trough 123 '.
The below that second liquid distribution trough 123 ' is arranged on the 3rd spray thrower 122 ' to be admitting first lean solution of the 3rd spray thrower 122 ' ejection, and second liquid distribution trough 123 ' distributes to first lean solution of admitting again and is transported to second packing layer 124 ' with first lean solution after will distributing again.Second packing layer 124 ' is arranged on second liquid distribution trough, 123 ' below, and is supported by the second packing layer supporting member 125 '.Second packing layer 124 ' can be in deflection plate regular plastic filler, the thread filler of wavy metal, the Pall ring dumped packing at least a, can structured packing be set again form second packing layer 124 ' through dumped packing is set in structured packing.Second packing layer 124 ' makes first lean solution of portion's entering from it and the flue gas that gets into from its underpart fully contact, thereby removes oxysulfide or oxysulfide and dust in the flue gas with first lean solution.
First dividing plate 128 comprises base plate and jut.The outward flange of base plate engages with the inner wall sealing of cylindrical shell 101, and base plate has intermediate openings and passes base plate to allow flue gas, jut from the edge with intermediate openings of base plate to upper process.Therefore, the sidewall of base plate and cylindrical shell 101 combines and can admit rich solution.First flue gas rises the jut that gas hood 126 covers first dividing plate 128, and first flue gas outward flange that rises gas hood 126 exceeds the periphery of the jut of first dividing plate 128, so that the intermediate openings that can not get into base plate from the rich solution of second packing layer, 124 ' outflow.In addition, first flue gas rises between the top edge of jut of the gas hood 126 and first dividing plate 128 and has certain distance, rises outflow between the gas hood 126 and first dividing plate 128 to allow flue gas from first flue gas.Therefore, first dividing plate 128 and first flue gas rise gas hood 126 and combine and allow that flue gas is bottom-up to be passed.
Rich solution outlet 127 is arranged on cylindrical shell 101 sidewalls position near the base plate of first dividing plate 128, and the height of rich solution outlet 127 is lower than the height of the jut top edge of first dividing plate 128, flows out to allow rich solution.
Therefore, first absorber portion with above-mentioned structure uses first lean solution and flue gas from flue gas pretreatment section 110 to carry out counter current contacting, thereby absorbs oxysulfide or oxysulfide and dust in the flue gas.
In another embodiment, can omit the 3rd spray thrower 122 '.In this case, can second liquid distribution trough 123 ' be directly connected to first lean solution inlet 121 ' with internal duct.
In another embodiment, first absorber portion can not adopt the form of filler absorber portion, but adopts the form of aforesaid void tower washing section.That is to say that the architectural feature of first absorber portion can be identical with the architectural feature of aforesaid void tower washing section or basic identical.
In one embodiment, second absorber portion comprises the second desulfuration solution lean solution (hereinafter referred the is second lean solution) inlet 121 that is arranged on the cylindrical shell 101 and is arranged on the 4th spray thrower 122 in the cylindrical shell 101, the 3rd liquid distribution trough 123, the 3rd packing layer 124 and the 3rd packing layer supporting member 125.
Second lean solution inlet 121 is connected to the 4th spray thrower 122 through internal duct, and receives second lean solution through exterior line from desorption system, thereby will be transported to the 4th spray thrower 122 from second lean solution that desorption system provides.The 4th spray thrower 122 is arranged on the 3rd liquid distribution trough 123 tops, to spray second lean solution towards the 3rd liquid distribution trough 123.
The below that the 3rd liquid distribution trough 123 is arranged on the 4th spray thrower 122 to be admitting second lean solution of the 4th spray thrower 122 ejections, and second lean solution of 123 pairs of admittances of the 3rd liquid distribution trough distributes and is transported to the 3rd packing layer 124 with second lean solution after will distributing again.The 3rd packing layer 124 is arranged on the 3rd liquid distribution trough 123 belows, and is supported by the 3rd packing layer supporting member 125.The 3rd packing layer 124 can be in deflection plate regular plastic filler, the thread filler of wavy metal, the Pall ring dumped packing at least a, can structured packing be set again form the 3rd packing layer 124 through dumped packing is set in structured packing.The 3rd packing layer 124 makes second lean solution of portion's entering from it and the flue gas that gets into from its underpart fully contact, thereby removes the oxysulfide in the flue gas with second lean solution.
In another embodiment, can omit the 4th spray thrower 122.In this case, can the 3rd liquid distribution trough 123 be directly connected to second lean solution inlet 121 with internal duct.
Therefore, second absorber portion with above-mentioned structure uses second lean solution and flue gas from first absorber portion to carry out counter current contacting, thereby absorbs the oxysulfide in the flue gas.
Second absorber portion can not comprise that the dividing plate and the flue gas that are arranged on the 3rd packing layer 124 belows rise gas hood.Therefore, the desulfuration solution rich solution that flows out from the 3rd packing layer 124 can directly get into first absorber portion, thereby in first absorber portion, continues to carry out the function of desulfurization.
The oxysulfide content of first lean solution can equal the oxysulfide content of second lean solution.Selectively, the oxysulfide content of first lean solution can be higher than the oxysulfide content of second lean solution, that is to say, first lean solution can be " semi lean solution " of top definition, and second lean solution can be " lean solution " of top definition.
In another embodiment, absorber portion 120 also comprises the demister (not shown) that is arranged on second absorber portion top, carries out demist with the flue gas to the process desulfurization operations, thereby the desulfuration solution that reduces as far as possible in the absorber portion 120 gets into desulfuration solution capture section 130.This demister can be electrostatic precipitator, plastics deflection plate demister, woven wire ripple demister.Can also on demister, be provided with and clean the water pipe import.
In an embodiment again, can rich solution be exported 127 rich solutions that flow out and deliver to desorption system and carry out desorb.In an embodiment again, the rich solution that flows out from rich solution outlet 127 can also turn back to first lean solution inlet, 121 ' and/or second lean solution inlet 121 to continue to serve as absorption liquid.In an embodiment again, the part of the rich solution that flows out from rich solution outlet 127 can turn back to first lean solution inlet, 121 ' and/or second lean solution inlet 121 to continue to serve as absorption liquid, and another part is delivered to desorption system and carried out desorb.
Though according to an embodiment of the utility model, absorber portion 120 comprises first absorber portion and second absorber portion, the utility model is not limited thereto, and for example absorber portion 120 can comprise the sub-absorber portion more than two.
In one embodiment, desulfuration solution capture section 130 comprise the trapping solution inlet 131 that is arranged on the cylindrical shell 101 and trapping solution outlet 137 and be arranged on the 5th spray thrower 132 in the cylindrical shell 101, the 4th liquid distribution trough 133, the 4th packing layer 134, the 4th packing layer supporting member 135, second flue gas rises gas hood 136 and second partition 138.
Trapping solution inlet 131 is connected to the 5th spray thrower 132 through internal duct, and receives trapping solution through exterior line, thereby trapping solution is transported to the 5th spray thrower 132.The 5th spray thrower 132 is arranged on the 4th liquid distribution trough 133 tops, to spray trapping solutions towards the 4th liquid distribution trough 133.
The below that the 4th liquid distribution trough 133 is arranged on the 5th spray thrower 132 to be admitting the trapping solution of the 5th spray thrower 132 ejections, and the trapping solution of 133 pairs of admittances of the 4th liquid distribution trough distributes and is transported to the 4th packing layer 134 with the trapping solution after will distributing again.The 4th packing layer 134 is arranged on the 4th liquid distribution trough 133 belows, and is supported by the 4th packing layer supporting member 135.The 4th packing layer 134 can be in deflection plate regular plastic filler, the thread filler of wavy metal, the Pall ring dumped packing at least a, can structured packing be set again form the 4th packing layer 134 through dumped packing is set in structured packing.The 4th packing layer 134 makes the trapping solution of portion's entering from it and the flue gas that gets into from its underpart fully contact, thereby captures the desulfuration solution drop in the flue gas with trapping solution.
The set-up mode that second partition 138, second flue gas rise gas hood 136 and trapping solution outlet 137 can rise gas hood 126 and rich solution with first dividing plate 128, first flue gas, and to export 127 set-up mode identical or substantially the same.Specifically, second partition 138 comprises base plate and jut.The outward flange of base plate engages with the inner wall sealing of cylindrical shell 101, and base plate has intermediate openings and passes base plate to allow flue gas, jut from the edge with intermediate openings of base plate to upper process.Therefore, the sidewall of base plate and cylindrical shell 101 combines and can admit trapping solution.Second flue gas rises the jut that gas hood 136 covers second partitions 138, and second flue gas outward flange that rises gas hood 136 exceeds the periphery of the jut of second partition 138, so that the intermediate openings that can not get into base plate from the trapping solution of the 4th packing layer 134 outflows.In addition, second flue gas rises between the top edge of jut of gas hood 136 and second partition 138 and has certain distance, rises outflow between gas hood 136 and the second partition 138 to allow flue gas from second flue gas.Therefore, the second partition 138 and second flue gas rise gas hood 136 and combine and allow that flue gas is bottom-up to be passed.
Trapping solution outlet 137 is arranged on cylindrical shell 101 sidewalls position near the base plate of second partition 138, and the height of trapping solution outlet 137 is lower than the height of the jut top edge of second partition 138, flows out to allow trapping solution.
Therefore, the desulfuration solution that has an above-mentioned structure captures section 130 usefulness trapping solutions and captures the desulfuration solution (for example, the drop of desulfuration solution) in the flue gas.Trapping solution can be the dilute aqueous solution of water (for example industrial soft water, desalted water) or desulfuration solution.The temperature of this industrial soft water can be 30 ℃~70 ℃.The trapping solution that contains desulfuration solution can turn back to trapping solution inlet 131 to be continued to use as trapping solution; And in this case; When the concentration of the desulfuration solution in the trapping solution acquire a certain degree (when for example the desulfuration solution concentration in the industrial soft water reaches 20g/L~50g/L), this trapping solution and all or part of rich solution that can be used as.
In another embodiment, can omit the 5th spray thrower 132.In this case, can the 4th liquid distribution trough 133 be directly connected to trapping solution inlet 131 with internal duct.
In another embodiment; Desulfuration solution captures section 130 and also comprises and be arranged on the 5th spray thrower 132 tops (under the situation of omitting the 5th spray thrower 132; Be arranged on the 4th liquid distribution trough 133 tops) the demister (not shown); So that the flue gas that captures reclaimer operation through desulfuration solution is carried out demist, capture the desulfuration solution entering demist section 140 in the section 130 thereby further reduce desulfuration solution.This demister can be electrostatic precipitator, plastics deflection plate demister, woven wire ripple demister.Can also on demister, be provided with and clean the water pipe import.
In an embodiment again, desulfuration solution captures section 130 and can not adopt filler to capture the form of section, but adopts the form of aforesaid void tower washing section.That is to say that the architectural feature of desulfuration solution capture section 130 can be identical with the architectural feature of aforesaid void tower washing section or basic identical.
In one embodiment, demist section 140 comprises that first demister 141 that is arranged in the cylindrical shell 101 and second demister, 142, the first demisters 141 and second demister 142 set gradually along the direction of flow of flue gas.Therefore, 140 pairs of flue gases from desulfuration solution capture section 130 of demist section carry out demist, thereby further reduce the desulfuration solution of carrying secretly in the flue gas.Comprise two demisters though demist section 140 has been shown in Fig. 1, the demist section can only comprise a demister or comprise the demister more than two.The demister here can be electrostatic precipitator, plastics deflection plate demister, woven wire ripple demister.Can also on demister, be provided with and clean the water pipe import.
Flue gas desulphurization system 100 also can comprise the exhanst gas outlet 103 that is in demist section 140 downstream (the for example top of cylindrical shell 101) along the direction of flow of flue gas, and the flue gas through desulfurization operations is discharged to flue gas desulphurization system 100 outsides through exhanst gas outlet 103 as stated.
In the flue gas desulphurization system 100 of the utility model, can cylindrical shell 101 with each packing layer corresponding side walls on offer manhole, overhaul helping.In addition, can the backwash pipeline be set to each packing layer, thereby in needs, packing layer be carried out backwash.
Under the situation that flue gas desulphurization system 100 is made up of flue gas pretreatment section 110, absorber portion 120, desulfuration solution capture section 130 and demist section 140; Flue gas pretreatment section 110 (parts except that cylindrical shell 101 outsides) can account for 1/5~1/4 of flue gas desulphurization system 100 height; Absorber portion 120 can account for 1/5~1/4 of flue gas desulphurization system 100 height; Desulfuration solution captures section 130 can account for 1/5~1/4 of flue gas desulphurization system 100 height, and demist section 140 can account for 1/4~2/5 of flue gas desulphurization system 100 height.So be provided with and make exhaust gas dust removal efficient and/or desulfurization degree reach best.
According to the flue gas desulphurization system of utility model and the sulfur removal technology that adopts this system to realize, absorber portion can adopt two kinds of different desulfuration solutions of oxysulfide content.Like this, desorption system can carry out desorb in various degree to rich solution, to obtain two kinds of different desulfuration solutions of said oxysulfide content.Therefore, desorption system there is no need whole desulfuration solution rich solutions are carried out desorb completely.Therefore, according to the flue gas desulphurization system of utility model with and the sulfur removal technology that adopts this system to realize help the reduction of energy consumption.
In addition, according to the flue gas desulphurization system of utility model and adopt in the sulfur removal technology that this system realizes, adopt two-step desulfurization solution absorption at least, thereby improved the desulfurization degree of flue gas.In addition, desulfuration solution captures and reclaims the loss that helps reducing desulfuration solution.

Claims (25)

1. a flue gas desulphurization system is characterized in that said system comprises that the flue gas washing section, absorber portion (120), the desulfuration solution that set gradually along the flow of flue gas direction capture section (130).
2. flue gas desulphurization system according to claim 1; It is characterized in that; Said system also comprises the flue dedusting section that is arranged on the upper reaches of flue gas washing section along the flow of flue gas direction; Said system has cylindrical shell (101), and flue dedusting section comprises booster fan (111) and the flue (112) that is successively set on the cylindrical shell outside along the flow of flue gas direction.
3. flue gas desulphurization system according to claim 2 is characterized in that, said flue (112) is S shape flue, T shape flue or their combination.
4. flue gas desulphurization system according to claim 1; It is characterized in that; Said system has cylindrical shell (101), the flue gas washing section comprise along the flow of flue gas direction set gradually with lower component: be arranged on the smoke inlet (102) on the cylindrical shell and be arranged on first spray thrower (114 '), first packing layer (116), first liquid distribution trough (115), second spray thrower (114) in the cylindrical shell.
5. flue gas desulphurization system according to claim 4; It is characterized in that; The flue gas washing section comprises that also first cleaning solution that is connected to first spray thrower and is arranged on the cylindrical shell enters the mouth (113 '), is connected to second spray thrower and is arranged on second cleaning solution inlet (113) on the cylindrical shell; And being arranged on the outside washing liquor tank (119) of cylindrical shell, first cleaning solution inlet and second cleaning solution inlet are connected to washing liquor tank.
6. flue gas desulphurization system according to claim 5; It is characterized in that; The flue gas washing section also comprises cleaning solution outlet (105) and the sludge outlet (104) that is arranged on first spray thrower below, and sludge outlet is positioned at the below of cleaning solution outlet, and the cleaning solution outlet is connected to washing liquor tank.
7. flue gas desulphurization system according to claim 6 is characterized in that, the flue gas washing section also comprises sludge settling equipment that is arranged between cleaning solution outlet and the sludge outlet and the mud discharging device (107) that is arranged on the sludge settling equipment below.
8. flue gas desulphurization system according to claim 4 is characterized in that, the flue gas washing section also comprises the demister (118) that is positioned at the second spray thrower downstream along the flow of flue gas direction.
9. flue gas desulphurization system according to claim 4 is characterized in that, the flue gas washing section also comprises second liquid distribution trough that is arranged on the upper reaches of first spray thrower along the flow of flue gas direction.
10. flue gas desulphurization system according to claim 1; It is characterized in that; Said system has cylindrical shell (101), absorber portion comprise along the flow of flue gas direction be successively set in the cylindrical shell with lower component: first dividing plate (128), first flue gas rise gas hood (126), second packing layer (124 '), second liquid distribution trough (123 '), the 3rd packing layer (124), the 3rd liquid distribution trough (123);
First dividing plate comprises base plate and jut, and the outward flange of base plate engages with the inner wall sealing of cylindrical shell, and base plate has intermediate openings, jut from the edge with intermediate openings of base plate to upper process;
First flue gas rises the jut that gas hood covers first dividing plate, and first flue gas outward flange that rises gas hood exceeds the periphery of the jut of first dividing plate;
First flue gas rises between the top edge of jut of the gas hood and first dividing plate and has certain distance.
11. flue gas desulphurization system according to claim 10; It is characterized in that; Absorber portion also comprises first lean solution inlet (121 '), second lean solution inlet (121) and the rich solution outlet (127) that is arranged on the cylindrical shell; First lean solution inlet is arranged on the upper reaches of second liquid distribution trough along the first lean solution flow direction; Second lean solution inlet is arranged on the upper reaches of the 3rd liquid distribution trough along the second lean solution flow direction, and the rich solution outlet is arranged between first dividing plate and second packing layer and near the base plate of first dividing plate, the height that rich solution exports is lower than the height of the jut top edge of first dividing plate.
12. flue gas desulphurization system according to claim 11 is characterized in that, the rich solution outlet is connected at least one in first lean solution inlet and second lean solution inlet through exterior line.
13. flue gas desulphurization system according to claim 1; It is characterized in that; Said system has cylindrical shell (101), absorber portion comprise along the flow of flue gas direction be successively set in the cylindrical shell with lower component: first dividing plate (128), first flue gas rise gas hood (126), the 3rd spray thrower (122 '), the 3rd packing layer (124), the 3rd liquid distribution trough (123);
First dividing plate comprises base plate and jut, and the outward flange of base plate engages with the inner wall sealing of cylindrical shell, and base plate has intermediate openings, jut from the edge with intermediate openings of base plate to upper process;
First flue gas rises the jut that gas hood covers first dividing plate, and first flue gas outward flange that rises gas hood exceeds the periphery of the jut of first dividing plate;
First flue gas rises between the top edge of jut of the gas hood and first dividing plate and has certain distance.
14. flue gas desulphurization system according to claim 13; It is characterized in that; Absorber portion also comprises first lean solution inlet (121 '), second lean solution inlet (121) and the rich solution outlet (127) that is arranged on the cylindrical shell; First lean solution inlet is arranged on the upper reaches of the 3rd spray thrower along the first lean solution flow direction; Second lean solution inlet is arranged on the upper reaches of the 3rd liquid distribution trough along the second lean solution flow direction, and the rich solution outlet is arranged between first dividing plate and the 3rd spray thrower and near the base plate of first dividing plate, the height that rich solution exports is lower than the height of the jut top edge of first dividing plate.
15. flue gas desulphurization system according to claim 14 is characterized in that, the rich solution outlet is connected at least one in first lean solution inlet and second lean solution inlet through exterior line.
16. flue gas desulphurization system according to claim 13 is characterized in that, absorber portion also comprises and is arranged on the 3rd spray thrower and first flue gas rises the liquid distribution trough between the gas hood.
17., it is characterized in that absorber portion also comprises the demister that is positioned at the 3rd liquid distribution trough downstream along the flow of flue gas direction according to claim 10 or 13 described flue gas desulphurization systems.
18. flue gas desulphurization system according to claim 1; It is characterized in that; Said system has cylindrical shell, desulfuration solution capture section comprise along the flow of flue gas direction be successively set in the cylindrical shell with lower component: second partition (138), second flue gas rise gas hood (136), the 4th packing layer (134), the 4th liquid distribution trough (133);
Second partition comprises base plate and jut, and the outward flange of base plate engages with the inner wall sealing of cylindrical shell, and base plate has intermediate openings, jut from the edge with intermediate openings of base plate to upper process;
Second flue gas rises the jut that gas hood covers second partition, and second flue gas outward flange that rises gas hood exceeds the periphery of the jut of second partition;
Second flue gas rises between the top edge of jut of gas hood and second partition and has certain distance.
19. flue gas desulphurization system according to claim 18; It is characterized in that; Desulfuration solution captures section and also comprises trapping solution inlet (131) and the trapping solution outlet (137) that is arranged on the cylindrical shell; Trapping solution inlet is arranged on the upper reaches of the 4th liquid distribution trough along the trapping solution flow direction, and the trapping solution outlet is arranged between second partition and the 4th packing layer and near the base plate of second partition, the height that trapping solution exports is lower than the height of the jut top edge of second partition.
20. flue gas desulphurization system according to claim 18 is characterized in that, desulfuration solution captures section and also comprises the demister that is positioned at the 4th liquid distribution trough downstream along the flow of flue gas direction.
21. flue gas desulphurization system according to claim 1; It is characterized in that; Said system has cylindrical shell, desulfuration solution capture section comprise along the flow of flue gas direction be successively set in the cylindrical shell with lower component: second partition (138), second flue gas rise gas hood (136), spray thrower (132);
Second partition comprises base plate and jut, and the outward flange of base plate engages with the inner wall sealing of cylindrical shell, and base plate has intermediate openings, jut from the edge with intermediate openings of base plate to upper process;
Second flue gas rises the jut that gas hood covers second partition, and second flue gas outward flange that rises gas hood exceeds the periphery of the jut of second partition;
Second flue gas rises between the top edge of jut of gas hood and second partition and has certain distance.
22. flue gas desulphurization system according to claim 21; It is characterized in that; Desulfuration solution captures section and also comprises trapping solution inlet (131) and the trapping solution outlet (137) that is arranged on the cylindrical shell; Trapping solution inlet is arranged on the upper reaches of spray thrower along the trapping solution flow direction, and the trapping solution outlet is arranged between second partition and the spray thrower and near the base plate of second partition, the height of trapping solution outlet is lower than the height of the jut top edge of second partition.
23. flue gas desulphurization system according to claim 21 is characterized in that, desulfuration solution captures section and also comprises the demister that is positioned at the spray thrower downstream along the flow of flue gas direction.
24. flue gas desulphurization system according to claim 1 is characterized in that, flue gas desulphurization system also comprises the demist section that is arranged on desulfuration solution capture section downstream along the flow of flue gas direction.
25. flue gas desulphurization system according to claim 24 is characterized in that, said system has cylindrical shell, and the demist section comprises at least one demister that is arranged in the cylindrical shell.
CN201120259853U 2011-07-15 2011-07-15 Flue gas desulfurization system Expired - Fee Related CN202146708U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103706237A (en) * 2013-12-11 2014-04-09 攀钢集团攀枝花钢铁研究院有限公司 Flue gas desulfurization system
CN104492243A (en) * 2015-01-08 2015-04-08 攀钢集团攀枝花钢铁研究院有限公司 Flue gas desulphurization system and flue gas desulphurization process
CN104587801A (en) * 2015-01-08 2015-05-06 攀钢集团攀枝花钢铁研究院有限公司 Flue gas desulfurization system
CN106000045A (en) * 2016-06-17 2016-10-12 王骞 Deep dedusting, desulfurating and denitrating equipment for boiler flue gas

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103706237A (en) * 2013-12-11 2014-04-09 攀钢集团攀枝花钢铁研究院有限公司 Flue gas desulfurization system
CN104492243A (en) * 2015-01-08 2015-04-08 攀钢集团攀枝花钢铁研究院有限公司 Flue gas desulphurization system and flue gas desulphurization process
CN104587801A (en) * 2015-01-08 2015-05-06 攀钢集团攀枝花钢铁研究院有限公司 Flue gas desulfurization system
CN106000045A (en) * 2016-06-17 2016-10-12 王骞 Deep dedusting, desulfurating and denitrating equipment for boiler flue gas
CN106000045B (en) * 2016-06-17 2019-04-16 王骞 Boiler smoke depth dust-removal and desulfurizing denitration device

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