CN111495139A - Wet-type desulfurization and denitrification device and process for high-sulfur-concentration flue gas - Google Patents
Wet-type desulfurization and denitrification device and process for high-sulfur-concentration flue gas Download PDFInfo
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- CN111495139A CN111495139A CN202010341004.1A CN202010341004A CN111495139A CN 111495139 A CN111495139 A CN 111495139A CN 202010341004 A CN202010341004 A CN 202010341004A CN 111495139 A CN111495139 A CN 111495139A
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
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- B01D53/34—Chemical or biological purification of waste gases
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Abstract
The invention discloses a wet-type desulfurization and denitrification device and process for high-sulfur-concentration flue gas, and belongs to the technical field of wet-type desulfurization and denitrification. The wet-type desulfurization and denitrification device and the wet-type desulfurization and denitrification process for the high-sulfur-concentration flue gas have good desulfurization and denitrification effects, water circulation is formed by the water tank, the water pump, the water inlet assembly and the spraying assembly, so that water resources are fully recycled, the water resources are saved, the flue gas treatment mechanism can be fixed in the treatment tower through the limiting mechanism, and after desulfurization and denitrification, the outer frame body can be pulled out of the treatment tower through the limiting plate, so that the desulfurization and denitrification agent and the denitrification catalyst can be conveniently replaced, the use is convenient, and the replacement is convenient.
Description
Technical Field
The invention relates to the technical field of wet desulfurization and denitration, in particular to a wet desulfurization and denitration device and process for high-sulfur-concentration flue gas.
Background
As the excellent resources such as coal, ore and the like are less and less, the resources of high-sulfur coal and high-sulfur ore are more and more applied to sintering and thermal power production, so that the sulfur content in the flue gas is gradually increased. Various sintering flue gas desulfurization technologies are continuously developed aiming at the desulfurization of the steel sintering machine.
The flue gas desulfurization and denitration technology is a boiler flue gas purification technology applied to the chemical industry of generating multi-nitrogen oxides and sulfur oxides. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution. The application of this technology is of considerable benefit for ambient air purification. Known flue gas desulfurization and denitrification technologies include the technologies of PAFP, ACFP, pyrolusite method, electron beam ammonia method, pulse corona method, gypsum wet method, catalytic oxidation method, microbial degradation method and the like.
The wet-type SOx/NOx control device of prior art sprays the absorption flue gas through spraying the mechanism often when handling high sulfur concentration flue gas, and the water after spraying is most all direct emission, has caused the waste of water resource to a certain extent, and SOx/NOx control agent and the denitration catalyst that set up in the treating tower are not convenient for take out and change in the use simultaneously, lead to using inconveniently.
Disclosure of Invention
The invention aims to provide a wet-type desulfurization and denitrification device and process for high-sulfur-concentration flue gas, which have good desulfurization and denitrification effects, water circulation is formed by a water tank, a water pump, a water inlet assembly and a spraying assembly, so that water resources are fully recycled, the water resources are saved, a flue gas treatment mechanism can be fixed in a treatment tower through a limiting mechanism, after desulfurization and denitrification, an outer frame body can be pulled out of the treatment tower through a limiting plate, so that a desulfurization and denitrification agent and a denitrification catalyst are convenient to replace, the use is convenient, the replacement is convenient, and the problems in the background art are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a wet-type desulfurization and denitrification device for high-sulfur-concentration flue gas comprises a treatment tower, wherein the lower end of the treatment tower is provided with an air inlet pipe, an air outlet is arranged at the upper end of the treatment tower, a connecting pipe is arranged at the air outlet, one end of the connecting pipe far away from the air outlet is connected with the air inlet of the fan, an air outlet pipe is arranged at the air outlet of the fan, an observation window is arranged on the right opposite side of the treatment tower, one side of the treatment tower is also provided with a water tank which is connected with a water outlet of the treatment tower through a water inlet component, a water pump is arranged on the water tank, the water inlet of the water pump is connected with the water tank through a water pipe, a spraying component is arranged at the water outlet of the water pump, the spraying assembly is installed on the treatment tower, a flue gas treatment mechanism is further arranged on the inner side of the treatment tower, and the flue gas treatment mechanism is fixed on the treatment tower through a limiting mechanism.
Further, the subassembly of intaking includes inlet tube, mount pad, filter screen and row's material pipe, the drain outlet department at the treatment tower is connected to the upper end of inlet tube, the lower extreme of inlet tube is connected on the water tank, and the mount pad is installed to the inner wall of inlet tube, install the filter screen on the mount pad, the position department that the inlet tube is close to the mount pad is provided with row's material pipe, arrange and install the valve on the material pipe.
Further, the spraying assembly comprises a main water outlet pipe, a water outlet pipe, spraying pipes and spraying heads, the main water outlet pipe is connected to the water outlet of the water pump, the main water outlet pipe is communicated with the water outlet pipe, one ends of the main water outlet pipe and the water outlet pipe penetrate into the treatment tower and are connected onto the spraying pipes, adjacent spraying pipes are parallelly installed on the inner wall of the treatment tower, and the spraying heads for water outlet are distributed on the spraying pipes.
Further, the flue gas treatment mechanism comprises an outer frame body, an upper layer of filter cloth, a middle layer of filter cloth, a lower layer of filter cloth, a desulfurization and denitrification agent and a denitrification catalyst, wherein the upper layer of filter cloth, the middle layer of filter cloth and the lower layer of filter cloth are sequentially arranged on the inner wall of the outer frame body from top to bottom, the desulfurization and denitrification agent is filled between the upper layer of filter cloth and the middle layer of filter cloth, and the denitrification catalyst is filled between the middle layer of filter cloth and the lower layer of filter cloth.
Further, flue gas treatment mechanism still includes direction support frame A, direction support frame B and limiting plate, direction support frame A and direction support frame B all are the arc form and install the both ends at outer frame body respectively, outer frame body passes through direction support frame A and direction support frame B installs on the inner wall of handling the tower, install the limiting plate on the direction support frame B, be provided with the spacing groove on the limiting plate, the limiting plate that is located the handling tower outside passes through limiting mechanism to be fixed on handling the tower.
Further, stop gear includes mounting panel, expanding spring, flexible guide post, gag lever post and pulling frame, the mounting panel is installed on the outer wall of handling the tower, the mounting panel is connected with the pulling frame through expanding spring and flexible guide post, install the gag lever post on the pulling frame, the gag lever post inserts the spacing inslot.
According to another aspect of the present invention, there is provided a desulfurization and denitrification process for a wet desulfurization and denitrification apparatus for flue gas with high sulfur concentration, comprising the steps of:
s1: the high-sulfur-concentration flue gas enters the treatment tower through the gas inlet pipe, the fan works to enable the high-sulfur-concentration flue gas entering the treatment tower to flow upwards so as to carry out desulfurization and denitrification, and after the desulfurization and denitrification treatment, the high-sulfur-concentration flue gas enters the connecting pipe through the gas outlet pipe and is discharged from the gas outlet pipe;
s2: when the high-sulfur concentration flue gas flows upwards, the water pump works to pump out the water source in the water tank, and the water source is discharged into the spraying pipe through the main water outlet pipe and the water outlet pipe and is sprayed through the spray head;
s3: after absorbing water, the high-sulfur-concentration flue gas continues to flow upwards, and when the high-sulfur-concentration flue gas passes through the flue gas treatment mechanism, the high-sulfur-concentration flue gas is subjected to desulfurization and denitrification operations through a desulfurization and denitrification agent and a denitrification catalyst;
s4: the fixed emission and the spray water that the high sulfur concentration flue gas after handling formed all fall to in the inlet pipe, filter it through the filter screen, and the spray water passes through in the filter screen flows to the water tank, and fixed emission is because not discharging through arranging the material pipe discharge under the action of gravity of filter screen and self.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention relates to a wet-type desulfurization and denitrification device and process for high-sulfur-concentration flue gas, wherein the high-sulfur-concentration flue gas enters a treatment tower through an air inlet pipe, the high-sulfur-concentration flue gas flows upwards under the action of a fan, a spray head sprays the flue gas, the high-sulfur-concentration flue gas absorbs water and then continuously flows upwards and passes through a flue gas treatment mechanism, the desulfurization and denitrification operation is carried out on the high-sulfur-concentration flue gas through a desulfurization and denitrification agent and a denitrification catalyst, fixed emissions and spray water formed by the treated high-sulfur-concentration flue gas fall into a water inlet pipe and are filtered through a filter screen, the spray water flows into a water tank through the filter screen, the fixed emissions are discharged through a discharge pipe without passing through the filter screen under the action of self gravity, the flue gas after desulfurization and denitrification is discharged into the atmosphere through an air outlet pipe, so that the desulfurization and denitrification effect of the high-sulfur-concentration flue gas is good, and the water, the water resource is fully recycled, the water resource is saved, and the water resource waste is avoided.
2. According to the wet-type desulfurization and denitrification device and process for the high-sulfur-concentration flue gas, after desulfurization and denitrification, the limiting rod is driven to move by the pulling frame, the telescopic spring and the telescopic guide post are both telescopic until the limiting rod leaves the limiting plate, the outer frame body can be pulled out of the treatment tower through the limiting plate, the flue gas treatment mechanism can be fixed in the treatment tower through the limiting mechanism, after desulfurization and denitrification, the outer frame body can be pulled out of the treatment tower through the limiting plate, so that the desulfurization and denitrification agent and the denitrification catalyst are convenient to replace, the use is convenient, and the replacement is convenient.
Drawings
FIG. 1 is a schematic diagram of a wet desulfurization and denitrification apparatus for flue gas with high sulfur concentration according to the present invention;
FIG. 2 is a schematic cross-sectional view of a treatment tower of the present invention;
FIG. 3 is an enlarged view of the invention at A;
FIG. 4 is a schematic view of a flue gas treatment mechanism of the present invention;
FIG. 5 is a schematic cross-sectional view of a flue gas treatment mechanism of the present invention;
FIG. 6 is a cross-sectional view of the outer frame of the present invention;
FIG. 7 is a top view of the flue gas treatment mechanism of the present invention;
FIG. 8 is a top view of the outer frame of the present invention;
FIG. 9 is a top view of the outer frame of the present invention;
fig. 10 is a plan view of the outer frame body of the present invention.
In the figure: 1. a treatment tower; 11. an air inlet pipe; 12. an air outlet; 13. an observation window; 2. a connecting pipe; 3. a fan; 4. an air outlet pipe; 5. a water tank; 51. a water pump; 6. a water intake assembly; 61. a water inlet pipe; 63. a mounting seat; 64. filtering with a screen; 65. a discharge pipe; 7. a spray assembly; 71. a main water outlet pipe; 72. a water outlet pipe; 73. a shower pipe; 74. a spray head; 8. a flue gas treatment mechanism; 81. an outer frame body; 82. upper layer filter cloth; 83. middle layer filter cloth; 84. lower layer filter cloth; 85. a desulfurization and denitrification agent; 86. a denitration catalyst; 87. a guide support frame A; 88. a guide support frame B; 89. a limiting plate; 891. a limiting groove; 9. a limiting mechanism; 91. mounting a plate; 92. a tension spring; 93. a telescopic guide post; 94. a limiting rod; 95. pulling the frame; 10. and (4) a valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a wet desulfurization and denitrification device for high-sulfur concentration flue gas comprises a treatment tower 1, wherein an air inlet pipe 11 is arranged at the lower end of the treatment tower 1, an air outlet 12 is arranged at the upper end of the treatment tower 1, a connecting pipe 2 is arranged at the air outlet 12, one end of the connecting pipe 2, which is far away from the air outlet 12, is connected with an air inlet of a fan 3, an air outlet pipe 4 is arranged at the air outlet of the fan 3, an observation window 13 is arranged right opposite to the treatment tower 1, a water tank 5 is further arranged at one side of the treatment tower 1, the water tank 5 is connected with a water outlet of the treatment tower 1 through a water inlet assembly 6, a water pump 51 is arranged on the water tank 5, a water inlet of the water pump 51 is connected with the water tank 5 through a water pipe, a spray assembly 7 is arranged at the water outlet of the water pump 51, the spray assembly 7, the high-sulfur concentration flue gas enters the treatment tower 1 through the air inlet pipe 11, the fan 3 works to enable the high-sulfur concentration flue gas entering the treatment tower 1 to flow upwards to further carry out desulfurization and denitrification, after desulfurization and denitrification treatment, the high-sulfur concentration flue gas enters the connecting pipe 2 through the air outlet 12 and is discharged from the air outlet pipe 4, when the high-sulfur concentration flue gas flows upwards, the water pump 51 works to pump out a water source in the water tank 5 and discharge the water source into the spraying pipe 73 through the main water outlet pipe 71 and the water outlet pipe 72, the water is sprayed through the spray head 74, after the high-sulfur concentration flue gas absorbs water, the high-sulfur concentration flue gas continues to flow upwards, when the high-sulfur concentration flue gas passes through the flue gas treatment mechanism 8, the desulfurization and denitrification operation is carried out on the high-sulfur concentration flue gas through the desulfurization and denitrification agent 85 and the denitrification catalyst 86, fixed emissions and spray water formed by the treated high-sulfur concentration flue gas fall into the water inlet, fixed emission is because not discharging through row material pipe 65 under the action of gravity of filter screen 64 and self, makes high sulfur concentration flue gas desulfurization denitration's effectual, constitutes hydrologic cycle through water tank 5, water pump 51, water inlet assembly 6 and spray assembly 7, makes the water resource obtain abundant cyclic utilization, and the water economy resource avoids water waste.
Referring to fig. 2, the water inlet assembly 6 includes a water inlet pipe 61, a mounting seat 63, a filter screen 64 and a discharge pipe 65, the upper end of the water inlet pipe 61 is connected at the water outlet of the treatment tower 1, the lower end of the water inlet pipe 61 is connected on the water tank 5, the mounting seat 63 is installed on the inner wall of the water inlet pipe 61, the filter screen 64 is installed on the mounting seat 63, the discharge pipe 65 is arranged at the position of the water inlet pipe 61 close to the mounting seat 63, the valve 10 is installed on the discharge pipe 65, the sprayed water and the fixed discharge formed after the high-sulfur concentration flue gas treatment are all discharged into the water inlet pipe 61 through the water outlet of the treatment tower 1, and are filtered through the filter screen 64, the sprayed water flows into the water tank 5 through the filter screen 64, and the fixed discharge is discharged through the discharge pipe.
Referring to fig. 3, the spray assembly 7 includes a main water outlet pipe 71, a water outlet pipe 72, a spray pipe 73 and a spray head 74, the main water outlet pipe 71 is connected to a water outlet of the water pump 51, the main water outlet pipe 71 is communicated with the water outlet pipe 72, one end of the main water outlet pipe 71 and one end of the water outlet pipe 72 are both connected to the spray pipe 73 through the treatment tower 1, the adjacent spray pipes 73 are installed in parallel on the inner wall of the treatment tower 1, the spray head 74 for water outlet is distributed on the spray pipe 73, the water pump 51 works to draw out the water source in the water tank 5 and discharge the water source into the spray pipe 73 through the main water outlet pipe 71 and the water outlet pipe 72, after the high-sulfur-concentration flue gas absorbs water by spraying through the spray head 74, SO2+ H2O → H2SO3 forms a water circulation through the water tank 5, the water pump 51, the water inlet assembly 6 and the spray assembly 7.
Referring to fig. 4-8, the flue gas treatment mechanism 8 includes an outer frame 81, an upper filter cloth 82, a middle filter cloth 83, a lower filter cloth 84, a desulfurization and denitrification agent 85 and a denitrification catalyst 86, the inner wall of the outer frame 81 is sequentially provided with the upper filter cloth 82, the middle filter cloth 83 and the lower filter cloth 84 from top to bottom, the desulfurization and denitrification agent 85 is filled between the upper filter cloth 82 and the middle filter cloth 83, the desulfurization and denitrification agent 85 is selected from nitrolime, the denitrification catalyst 86 is filled between the middle filter cloth 83 and the lower filter cloth 84, the denitrification catalyst 86 is selected from sintering dust collected by an electric precipitator in the sintering process of vanadium titano-magnetite, the high-sulfur flue gas continuously flows upwards after absorbing water, when the high-sulfur flue gas passes through the flue gas treatment mechanism 8, the desulfurization and denitrification operation is performed on the high-sulfur flue gas by the desulfurization and denitrification agent 85 and the denitrification catalyst 86, the adjacent spray pipes 73 are respectively located at the upper end and the, after the high-sulfur concentration flue gas is sprayed, the flue gas is treated by a flue gas treatment mechanism 8, and after the treatment, the flue gas is sprayed again, wherein H is2SO3+Ca(OH)2→Ca(SO3)2+2H2O，Ca(SO3)2+O2→Ca(SO4)2，2NO+O2→2NO2Oxidation reaction under the catalysis of the denitration catalyst 86, 3NO2+H2O→2HNO3+NO，Ca(OH)2+2HNO3→Ca(NO3)2+2H2O, Ca (SO) is formed in the flue gas having a high sulfur concentration at this time by the desulfurizing/denitrifying agent 85 and the denitrifying catalyst 864)2And Ca (NO)3)2The flue gas after desulfurization and denitrification treatmentThe outlet pipe 4 is discharged.
Referring to fig. 9, flue gas treatment mechanism 8 includes guide support frame a87, guide support frame B88 and limiting plate 89, guide support frame a87 and guide support frame B88 are all arc-shaped and install respectively at the both ends of outer frame body 81, outer frame body 81 is installed on the inner wall of handling tower 1 through guide support frame a87 and guide support frame B88, install limiting plate 89 on the guide support frame B88, be provided with spacing groove 891 on the limiting plate 89, limiting plate 89 that is located the outside of handling tower 1 fixes on handling tower 1 through limiting mechanism 9, fix outer frame body 81 on the inner wall of handling tower 1 through guide support frame a87 and guide support frame B88, make desulfurization and denitrification agent 85 and denitration catalyst 86 carry out desulfurization and denitration to the flue gas.
Referring to fig. 10, the limiting mechanism 9 includes a mounting plate 91, a telescopic spring 92, a telescopic guide post 93, a limiting rod 94 and a pulling frame 95, the mounting plate 91 is mounted on the outer wall of the treatment tower 1, the mounting plate 91 is connected to the pulling frame 95 through the telescopic spring 92 and the telescopic guide post 93, the limiting rod 94 is mounted on the pulling frame 95, the limiting rod 94 is inserted into the limiting groove 891, after desulfurization and denitrification, the limiting rod 94 is driven by the pulling frame 95 to move, the telescopic spring 92 and the telescopic guide post 93 are both telescopic until the limiting rod 94 leaves the limiting plate 89, at the moment, the outer frame body 81 is pulled out from the processing tower 1 through the limiting plate 89, the flue gas treatment mechanism 8 can be fixed in the treatment tower 1 through the limiting mechanism 9, after desulfurization and denitrification, can pull out outer frame body 81 from treating tower 1 through limiting plate 89, be convenient for change SOx/NOx control agent 85 and denitration catalyst 86, it is convenient to use, it is convenient to change.
In order to better show the desulfurization and denitrification processes of the wet desulfurization and denitrification device for high-sulfur-concentration flue gas, the embodiment now proposes a desulfurization and denitrification process for the wet desulfurization and denitrification device for high-sulfur-concentration flue gas, which comprises the following steps:
the method comprises the following steps: the high-sulfur-concentration flue gas enters the treatment tower 1 through the gas inlet pipe 11, the fan 3 works to enable the high-sulfur-concentration flue gas entering the treatment tower 1 to flow upwards so as to carry out desulfurization and denitrification, and after desulfurization and denitrification treatment, the high-sulfur-concentration flue gas enters the connecting pipe 2 through the gas outlet 12 and is discharged from the gas outlet pipe 4;
step two: when the high-sulfur flue gas flows upwards, the water pump 51 works to pump out the water source in the water tank 5, discharge the water source into the spraying pipe 73 through the main water outlet pipe 71 and the water outlet pipe 72, and spray the water through the spray head 74;
step three: after absorbing water, the high-sulfur flue gas continues to flow upwards, and when the high-sulfur flue gas passes through the flue gas treatment mechanism 8, the high-sulfur flue gas is subjected to desulfurization and denitrification operations through a desulfurization and denitrification agent 85 and a denitrification catalyst 86;
step four: the fixed emission and the shower water that the high sulfur concentration flue gas formed after handling all drop to inlet tube 61 in, filter it through filter screen 64, and the shower water flows to the water tank 5 in through filter screen 64, and the fixed emission is owing to not pass through filter screen 64 and discharge through arranging material pipe 65 under the effect of self gravity.
In summary, in the wet desulfurization and denitration device and process for high sulfur concentration flue gas of the present invention, the high sulfur concentration flue gas enters the treatment tower 1 through the air inlet pipe 11, the high sulfur concentration flue gas flows upward under the action of the fan 3, the spray head 74 sprays the flue gas, the high sulfur concentration flue gas continues to flow upward and pass through the flue gas treatment mechanism 8 after absorbing water, the desulfurization and denitration operation is performed on the high sulfur concentration flue gas through the desulfurization and denitration agent 85 and the denitration catalyst 86, the fixed emissions and the spray water formed by the treated high sulfur concentration flue gas both fall into the water inlet pipe 61, the spray water is filtered through the filter screen 64, the spray water flows into the water tank 5 through the filter screen 64, the fixed emissions are discharged through the discharge pipe 65 due to the gravity of the fixed emissions without passing through the filter screen 64, the flue gas after desulfurization and denitration is discharged into the atmosphere through the air outlet pipe 4, so that the desulfurization and denitration effect of the high sulfur concentration flue gas is, through the water tank 5, water pump 51, water cycle is constituteed to water inlet assembly 6 and spray assembly 7, make the water resource obtain abundant cyclic utilization, the water economy resource, avoid the water waste, after SOx/NOx control, drive gag lever post 94 through pulling frame 95 and remove, expanding spring 92 and flexible guide post 93 are all flexible, leave limiting plate 89 until gag lever post 94, can pull out outer frame body 81 from handling tower 1 through limiting plate 89, can fix flue gas processing mechanism 8 in handling tower 1 through stop gear 9, after SOx/NOx control, can pull out outer frame body 81 from handling tower 1 through limiting plate 89, be convenient for change SOx/NOx control agent 85 and denitration catalyst 86, high durability and convenient use, convenient replacement.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (7)
1. The wet type desulfurization and denitrification device for the high-sulfur-concentration flue gas is characterized by comprising a treatment tower (1), wherein an air inlet pipe (11) is arranged at the lower end of the treatment tower (1), an air outlet (12) is arranged at the upper end of the treatment tower (1), a connecting pipe (2) is arranged at the position of the air outlet (12), one end, far away from the air outlet (12), of the connecting pipe (2) is connected to an air inlet of a fan (3), an air outlet pipe (4) is arranged at the position of the air outlet of the fan (3), an observation window (13) is arranged right opposite to the treatment tower (1), a water tank (5) is further arranged on one side of the treatment tower (1), the water tank (5) is connected to a water outlet of the treatment tower (1) through a water inlet assembly (6), a water pump (51) is arranged on the water tank (5), and a water inlet of the water, the spray assembly (7) is installed at the water outlet of the water pump (51), the spray assembly (7) is installed on the treatment tower (1), a flue gas treatment mechanism (8) is further arranged on the inner side of the treatment tower (1), and the flue gas treatment mechanism (8) is fixed on the treatment tower (1) through a limiting mechanism (9).
2. The wet type desulfurization and denitrification device for high sulfur concentration flue gas as claimed in claim 1, wherein said water inlet assembly (6) comprises a water inlet pipe (61), a mounting seat (63), a filter screen (64) and a discharge pipe (65), the upper end of said water inlet pipe (61) is connected to the water outlet of the treatment tower (1), the lower end of said water inlet pipe (61) is connected to the water tank (5), the mounting seat (63) is installed on the inner wall of the water inlet pipe (61), the filter screen (64) is installed on said mounting seat (63), the discharge pipe (65) is arranged at the position of said water inlet pipe (61) close to the mounting seat (63), and the valve (10) is installed on said discharge pipe (65).
3. The wet desulfurization and denitrification device for the flue gas with high sulfur concentration according to claim 1, wherein the spray assembly (7) comprises a main water outlet pipe (71), a water outlet pipe (72), spray pipes (73) and spray heads (74), the main water outlet pipe (71) is connected to the water outlet of the water pump (51), the water outlet pipe (72) is communicated with the main water outlet pipe (71), one ends of the main water outlet pipe (71) and the water outlet pipe (72) penetrate into the treatment tower (1) and are connected to the spray pipes (73), the adjacent spray pipes (73) are installed on the inner wall of the treatment tower (1) in parallel, and the spray heads (74) for water outlet are distributed on the spray pipes (73).
4. The wet desulfurization and denitrification apparatus for high sulfur concentration flue gas according to claim 1, wherein the flue gas treatment mechanism (8) comprises an outer frame (81), an upper layer filter cloth (82), a middle layer filter cloth (83), a lower layer filter cloth (84), a desulfurization and denitrification agent (85) and a denitrification catalyst (86), the upper layer filter cloth (82), the middle layer filter cloth (83) and the lower layer filter cloth (84) are sequentially arranged on the inner wall of the outer frame (81) from top to bottom, the desulfurization and denitrification agent (85) is filled between the upper layer filter cloth (82) and the middle layer filter cloth (83), and the denitrification catalyst (86) is filled between the middle layer filter cloth (83) and the lower layer filter cloth (84).
5. The wet desulfurization and denitrification device for high-sulfur flue gas according to claim 4, wherein the flue gas treatment mechanism (8) further comprises a guide support frame A (87), a guide support frame B (88) and a limit plate (89), wherein the guide support frame A (87) and the guide support frame B (88) are both arc-shaped and are respectively installed at two ends of the outer frame body (81), the outer frame body (81) is installed on the inner wall of the treatment tower (1) through the guide support frame A (87) and the guide support frame B (88), the limit plate (89) is installed on the guide support frame B (88), a limit groove (891) is formed in the limit plate (89), and the limit plate (89) located outside the treatment tower (1) is fixed on the treatment tower (1) through the limit mechanism (9).
6. The wet type desulfurization and denitrification device for the flue gas with high sulfur concentration according to claim 1, wherein the limiting mechanism (9) comprises a mounting plate (91), an expansion spring (92), an expansion guide post (93), a limiting rod (94) and a pulling frame (95), the mounting plate (91) is mounted on the outer wall of the treatment tower (1), the mounting plate (91) is connected with the pulling frame (95) through the expansion spring (92) and the expansion guide post (93), the limiting rod (94) is mounted on the pulling frame (95), and the limiting rod (94) is inserted into the limiting groove (891).
7. The desulfurization and denitrification process of the wet desulfurization and denitrification device for high sulfur concentration flue gas according to any one of claims 1 to 6, comprising the steps of:
s1: the high-sulfur-concentration flue gas enters the treatment tower (1) through the gas inlet pipe (11), the fan (3) works to enable the high-sulfur-concentration flue gas entering the treatment tower (1) to flow upwards to further carry out desulfurization and denitrification, and after desulfurization and denitrification treatment, the high-sulfur-concentration flue gas enters the connecting pipe (2) through the gas outlet (12) and is discharged from the gas outlet pipe (4);
s2: when the high-sulfur flue gas flows upwards, the water pump (51) works to pump out the water source in the water tank (5), discharge the water source into the spray pipe (73) through the main water outlet pipe (71) and the outlet water pipe (72), and spray the water source through the spray head (74);
s3: after absorbing water, the high-sulfur-concentration flue gas continues to flow upwards, and when the high-sulfur-concentration flue gas passes through the flue gas treatment mechanism (8), the high-sulfur-concentration flue gas is subjected to desulfurization and denitrification operations through a desulfurization and denitrification agent (85) and a denitrification catalyst (86);
s4: the fixed emission and the spray water that the high sulfur concentration flue gas formed after handling all fall to inlet tube (61) in, filter it through filter screen (64), the spray water flows to water tank (5) in through filter screen (64), and fixed emission is owing to not pass through filter screen (64) and discharge through arranging material pipe (65) under the action of self gravity.
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