WO2011126072A1 - 湿式排煙脱硫装置 - Google Patents
湿式排煙脱硫装置 Download PDFInfo
- Publication number
- WO2011126072A1 WO2011126072A1 PCT/JP2011/058806 JP2011058806W WO2011126072A1 WO 2011126072 A1 WO2011126072 A1 WO 2011126072A1 JP 2011058806 W JP2011058806 W JP 2011058806W WO 2011126072 A1 WO2011126072 A1 WO 2011126072A1
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- WIPO (PCT)
- Prior art keywords
- absorption tower
- prevention member
- gas blow
- liquid
- gas
- Prior art date
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/008—Liquid distribution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2219/00—Treatment devices
- F23J2219/40—Sorption with wet devices, e.g. scrubbers
Definitions
- the present invention relates to a flue gas treatment apparatus for purifying a flue gas of a fuel discharged from a combustion apparatus such as a boiler installed in a thermal power plant or factory, and in particular, a sulfur oxide contained in the flue gas,
- the present invention relates to a wet flue gas desulfurization apparatus that reduces substances such as acid gases such as hydrogen chloride and hydrogen fluoride, dust, and trace components contained in fuel.
- FIG. 22 shows a general system of a wet flue gas desulfurization apparatus in a thermal power generation facility.
- exhaust gas 1 discharged from a boiler or the like installed in a thermal power plant or factory is introduced into an absorption tower 4 from a gas inlet 3.
- the absorption tower 4 is mainly composed of an absorption tower liquid reservoir 5 at the lower part of the tower and an absorption part 6 at the upper part of the tower.
- the amount of sulfur oxide contained in the exhaust gas 1 from a boiler or the like is adjusted. Accordingly, an appropriate amount of the absorbing liquid S made of limestone slurry is supplied by adjusting the opening of the slurry flow rate adjusting valve 16.
- the slurry-like absorption liquid S in the absorption tower liquid reservoir 5 is pressurized by the absorption tower circulation pump 10 and passes through the absorption tower circulation pipe 13 to the upper empty tower in the absorption tower 4 in the direction of gas flow.
- the spray header 8 provided in multiple stages (at least three stages or more).
- a large number of spray nozzles 9 are arranged in each spray header 8, and sulfur oxide and hydrogen chloride contained in the exhaust gas due to gas-liquid contact between the absorbing liquid S sprayed from the spray nozzle 9 and the exhaust gas 1, An acidic gas such as hydrogen fluoride is absorbed on the droplet surface of the absorbing liquid S.
- mist accompanying the exhaust gas is removed by a mist eliminator 7 installed at the outlet of the absorption tower 4, and the clean exhaust gas 2 is reheated as necessary through the absorption tower outlet flue and discharged from the chimney.
- the sulfur oxide in the exhaust gas 1 reacts with the calcium compound in the absorption liquid S to become calcium sulfite as an intermediate product, flows down to the absorption tower liquid reservoir 5 of the absorption tower 4 and is absorbed by the oxidation air blower 17. It is oxidized by the air supplied into the absorption liquid S of the tower liquid reservoir 5 to become gypsum which is the final product.
- the oxidized air supplied to the absorption tower 4 is refined by the oxidation stirrer 15 for stirring the absorption liquid S in the absorption tower liquid reservoir 5, thereby increasing the utilization rate of the oxidized air. . Thereafter, the absorption liquid S is discharged from the absorption tower liquid reservoir 5 to the gypsum dewatering equipment 12 by the extraction pump 11 according to the amount of gypsum produced, dehydrated and recovered as powder gypsum 14.
- FIG. 23 shows a horizontal section of the absorption tower 4 in the conventional wet flue gas desulfurization apparatus.
- the number of spray nozzles 9 installed around the side wall surface of the absorption tower 4 is inevitably reduced, and therefore the absorption flowing down the side wall of the absorption tower 4.
- the liquid density of the liquid S tends to be lower (decreased) than the center of the absorption tower 4.
- the downward absorption liquid spray angle ⁇ indicated by the white circle in the figure is about 90 to 120 degrees.
- Patent Document 1 proposes an invention for re-scattering in the center.
- the inner peripheral end of the gas blow-off prevention member 19 made of the ring-shaped plate is used as a starting point.
- a horseshoe-shaped nose gas blow-off
- the prevention member is disposed.
- This liquid film becomes a liquid film having a continuous and uniform thickness in the absorption tower 4 and flows down in the absorption tower 4 without splitting.
- the collision with the liquid film causes an increase in pressure loss.
- the passage cross-sectional area of the gas passing through the absorption tower 4 is suppressed by the continuous liquid film, and the gas flow velocity in the absorption tower 4 is increased. For this reason, there is a problem that the power consumption of the exhaust gas fan increases and the running cost is high.
- Patent Document 2 for the purpose of preventing an increase in pressure loss due to the liquid film, a horseshoe shape is formed in steps so as not to overlap the upper part of the gas inlet in the absorption tower in the vertical direction. It is shown that a nose (gas blow-out prevention member) is arranged. However, since the nose (gas blow-out prevention member) is not installed over the entire circumference of the absorption side wall surface, there is a problem that a short path of exhaust gas occurs in the side wall portion where the gas blow-out prevention member is not installed. .
- the object of the present invention is to provide a wet-type flue gas desulfurization apparatus that eliminates the drawbacks of the prior art, obtains a high desulfurization performance, has a low pressure loss in the absorption tower, and has a low running cost.
- the first means of the present invention comprises: a liquid reservoir section provided at the lower part of the tower for storing the absorbing liquid; and a plurality of stages provided above the liquid reservoir section for spraying the absorbing liquid.
- An absorption part having a spray header, an absorption liquid circulation system for circulating the absorption liquid in the liquid reservoir to the spray header, an exhaust gas inlet part provided on a side wall between the liquid reservoir and the absorption part, and an exhaust gas thereof
- a dam is provided discontinuously along the circumferential direction of the gas blow-off prevention member at the inner peripheral end of the gas blow-off prevention member.
- the total length of the weir provided at the inner peripheral end of the gas blow-off preventing member is provided with the weir at the inner peripheral end of the gas blow-off preventing member. It is characterized by being longer than the total length of the non-existing part.
- the third means of the present invention includes a liquid reservoir provided in the lower part of the tower for storing the absorbent, and an absorbent having a plurality of spray headers provided above the liquid reservoir for spraying the absorbent.
- An absorption liquid circulation system for circulating the absorption liquid in the liquid reservoir to the spray header, an exhaust gas inlet provided on a side wall between the liquid reservoir and the absorber, and the uppermost stage from the exhaust gas inlet
- a continuous weir is provided on the entire inner peripheral end of the gas blow-off prevention member, and a gap is formed between the outer peripheral end of the gas blow-off prevention member and the side wall inner surface of the absorption tower.
- the fourth means of the present invention includes a liquid reservoir provided in the lower part of the tower for storing the absorbent, and an absorbent having a plurality of spray headers provided above the liquid reservoir for spraying the absorbent.
- An absorption liquid circulation system for circulating the absorption liquid in the liquid reservoir to the spray header, an exhaust gas inlet provided on a side wall between the liquid reservoir and the absorber, and the uppermost stage from the exhaust gas inlet
- a continuous weir is provided on the entire inner peripheral end of the gas blow-off prevention member, and a spray hole for spraying the absorbing liquid accumulated on the gas blow-off prevention member is formed in the gas blow-off prevention member or the lower part of the weir. It is characterized by.
- the fifth means of the present invention includes a liquid reservoir provided in the lower part of the tower for storing the absorbent, and an absorbent having a plurality of spray headers provided above the liquid reservoir for spraying the absorbent.
- An absorption liquid circulation system for circulating the absorption liquid in the liquid reservoir to the spray header, an exhaust gas inlet provided on a side wall between the liquid reservoir and the absorber, and the uppermost stage from the exhaust gas inlet
- a continuous weir is provided on the entire inner peripheral edge of the gas blow-off prevention member, and a liquid return pipe is connected to the gas blow-off prevention member for returning the absorption liquid accumulated on the gas blow-off prevention member to the liquid reservoir. It is characterized by.
- a lug attached to the inner wall of the absorption tower along the circumferential direction is fixed to the side wall of the absorption tower, the gas blow-off prevention member is placed on the lug, and the gas blow-off prevention member is fixed to the lug. And is not fixed to the side wall of the absorption tower.
- the present invention has the above-described configuration, and can provide a wet flue gas desulfurization apparatus that can obtain high desulfurization performance, has a low pressure loss in the absorption tower, and has a low running cost.
- FIG. 1 is a vertical sectional view taken along line XX. It is a vertical expanded sectional view of the gas blow-off prevention member attached to the absorption tower. It is a vertical expanded sectional view which shows another attachment state of the gas blow-off prevention member. It is a horizontal sectional view for demonstrating the attachment structure of the gas blow-off prevention member with respect to an absorption tower. It is a vertical expanded sectional view which shows the lug with a supporting member. It is a vertical expanded sectional view which shows the lug without a supporting member. It is a vertical expanded sectional view which shows the inclined lug.
- FIG. 6 is a vertical enlarged sectional view taken along line XX.
- (A) It is a vertical expanded sectional view which shows the mode of the part of the gas blow-off prevention member which has provided the weir, and the part of the gas blow-off prevention member which has not provided the weir during operation of the wet flue gas desulfurization apparatus. is there. It is a horizontal sectional view which shows the inside of the absorption tower which concerns on Example 2 of this invention.
- the first to fifth aspects of the present invention described below absorb the gas inlet portion through which exhaust gas is introduced as means for removing sulfur oxides contained in exhaust gas discharged from boilers installed in thermal power plants and factories.
- a spray header is formed on the side wall of the tower and sprays the absorbing liquid against the exhaust gas rising from the gas inlet to the inside of the absorption tower in a gas flow direction, and the inner surface of the absorption tower side wall above the gas inlet. It is intended for a wet flue gas desulfurization apparatus having a configuration in which a gas blow-off preventing member is installed over the entire circumference.
- the first aspect of the present invention is characterized in that a portion provided with a weir and a portion not provided with a weir are alternately arranged at the inner peripheral end of the gas blow-off preventing member.
- the gas blow-off prevention member As described above, by installing the gas blow-off prevention member over the entire circumference of the inner surface of the absorption tower side wall, the exhaust gas that tries to short-pass the side wall portion of the absorption tower is directed toward the center of the absorption tower, thereby preventing the drift of the exhaust gas. be able to. Further, the absorption liquid flowing down the side wall of the absorption tower is received by the gas blow-off prevention member and re-scattered from the gas blow-off prevention member toward the center of the absorption tower, so that the gas-liquid of the exhaust gas and the absorption liquid Contact efficiency can be improved.
- the absorption flowed down to the portion provided with the weir by alternately arranging the portion provided with the weir and the portion not provided with the weir at the inner peripheral end portion thereof
- the liquid flows to the part where no weir is provided.
- the resprayed absorption liquid flows from the inner peripheral end of the gas blow-off prevention member as a liquid film and flows down to the inside of the absorption tower, but the liquid film is a continuous one in the circumferential direction.
- a large increase in pressure loss can be suppressed by passing the exhaust gas through a portion where no liquid film is formed instead of the liquid film having such a thickness.
- the exhaust gas that is going to short-pass the side wall portion of the absorption tower is directed toward the center of the absorption tower. Can be prevented.
- the absorption liquid flowing down on the gas blow-off prevention member along the inner surface of the side wall of the absorption tower is connected to the inner peripheral end of the gas blow-off prevention member.
- it does not re-scatter as a continuous liquid film inside the absorption tower, and flows down the absorption tower side wall from the gap formed between the absorption tower side wall and the gas blow-off prevention member to the liquid reservoir. Since it is recovered, an increase in the pressure loss of the absorption tower can be suppressed.
- a continuous weir is provided over the entire inner peripheral end of the gas blow-off prevention member, and the absorption liquid accumulated on the gas blow-off prevention member is sprayed on the gas blow-off prevention member or the lower part of the weir.
- the spray hole which forms is formed.
- the exhaust gas that is going to short-pass the side wall portion of the absorption tower is directed toward the center of the absorption tower. Can be prevented.
- the absorption liquid flowing down on the gas blow-off prevention member along the inner surface of the side wall of the absorption tower is connected to the inner peripheral end of the gas blow-off prevention member.
- it does not re-spray as a continuous liquid film inside the absorption tower, and it is collected separately by flowing down to the liquid reservoir from the spray hole provided in the gas blow-off prevention member without forming a continuous liquid film. Therefore, an increase in the pressure loss of the absorption tower can be suppressed.
- a continuous weir is provided on the entire inner peripheral end of the gas blow-off prevention member, and the absorption liquid accumulated on the gas blow-off prevention member is returned to the liquid reservoir.
- a liquid return pipe is connected.
- the exhaust gas that is going to short-pass the side wall portion of the absorption tower is directed toward the center of the absorption tower. Can be prevented.
- the absorption liquid flowing down on the gas blow-off prevention member along the inner surface of the side wall of the absorption tower is connected to the inner peripheral end of the gas blow-off prevention member.
- it does not re-spray as a continuous liquid film inside the absorption tower, and recovers from the liquid return pipe provided on the gas blow-off prevention member separately into the liquid reservoir without becoming a continuous liquid film. Therefore, an increase in the pressure loss of the absorption tower can be suppressed.
- a lug attached to the inner wall of the side wall of the absorption tower along the circumferential direction is fixed to the side wall of the absorption tower, and the gas blowout prevention member is placed on the lug, The prevention member is fixed to the lug and is not fixed to the side wall of the absorption tower.
- the overall system of the wet flue gas desulfurization apparatus in the thermal power generation facility is substantially the same as that shown in FIG.
- FIG. 1 is a horizontal cross-sectional view showing the inside of an absorption tower according to Embodiment 1 of the present invention
- FIG. 2 is a vertical cross-sectional view taken along line XX in FIG. 1
- FIGS. 3 (a) and 3 (b) are attached to the absorption tower. It is a vertical expanded sectional view of a gas blow-off prevention member.
- a gas blow-off prevention member 19 is provided over the entire circumference of the absorption tower 4 above the gas inlet 3 of the absorption tower 4 and inside the side wall of the absorption tower 4 below the uppermost spray header 8. Projecting toward the inside of the absorption tower 4.
- the gas blowout prevention member 19 is provided with a plurality of portions 19 a provided with the weirs 23 and portions 19 b not provided with the weirs 23 alternately along the circumferential direction of the absorption tower 4. That is, the weir 23 is discontinuously provided at the inner peripheral end of the gas blow-off preventing member 19.
- the entire circumference of the absorption tower 4 is equally divided into eight portions, and four portions 19a provided with the weir 23 and four portions 19b provided with no weir 23 are formed alternately.
- FIGS. 3A and 3B show examples in which the mounting angle ⁇ of the weir 23 with respect to the side wall of the absorption tower 4 is approximately 90 degrees.
- FIGS. 4A and 4B show the mounting angle ⁇ of the weir 23. For example, an example of about 30 to 60 degrees and less than 90 degrees is shown. The attachment angle ⁇ of the weir 23 exceeding 90 degrees may be set.
- the width W, the mounting angle ⁇ , and the height H of the weir 23 shown in FIGS. 3 and 4 are not particularly specified, and are arbitrary dimensions and angles. Also, the attachment range of the weir 23 (the range of the portion 19a where the weir 23 is provided and the portion 19b where the weir 23 is not provided) is not particularly specified, and is an arbitrary size.
- FIG. 5 is a horizontal cross-sectional view for explaining the structure for attaching the gas blow-off prevention member 19 to the main body of the absorption tower 4, and the weir 23 is not shown to simplify the drawing.
- a plurality of (four in this embodiment) lugs 20 are attached at equal intervals by means of welding or the like, for example, inside the side wall above the gas inlet 3 of the absorption tower 4 main body. Then, the gas blow-out preventing member 19 is placed on the lug 20 and the gas blow-out preventing member 19 is fixed to the lug 20 by appropriate means such as bolts or welding.
- the gas blow-off prevention member 19 is not directly fixed to the main body of the absorption tower 4 by welding or the like. This is for improving the workability at the site and improving the maintainability such that the gas blow-out preventing member 19 can be easily replaced after a lapse of time.
- a lug 20a with an inclined support member as shown in FIG. 6 or a lug 20b with no support member as shown in FIG. 7 is used, and the number and length of the lugs 20 are arbitrary. It is. 6 and 7, the lug 20 is mounted roughly perpendicular to the side wall surface of the absorption tower 4, but the gas blow-off prevention member 19 is attached to the side wall surface of the absorption tower 4 as shown in FIG. 8. In the case of being provided with an inclination, it is necessary to provide the lug 20 with an inclination accordingly. In addition, as shown in FIG.
- FIGS. 9 to 11 are views for explaining the state of the operation of the wet flue gas desulfurization apparatus.
- FIG. 9 is a horizontal sectional view showing the inside of the absorption tower 4.
- FIG. 10 is a vertical enlarged sectional view on the line XX in FIG.
- FIGS. 11 (a) and 11 (b) are enlarged vertical sectional views showing a portion 19a of the gas blow-off prevention member provided with the weir and a portion 19b of the gas blow-off prevention member not provided with the weir.
- the exhaust gas 1 generated in a boiler or the like installed in a thermal power plant or factory is introduced into the absorption tower 4 from the gas inlet 3.
- the slurry-like absorption liquid S in the absorption tower liquid reservoir 5 is increased in pressure by the absorption tower circulation pump 10, and is discharged into the upper empty tower portion in the absorption tower 4 via the absorption tower circulation pipe 13. 1 is supplied to spray headers 8 provided in multiple stages along the flow direction.
- a large number of spray nozzles 9 are arranged in each spray header 8, and sulfur oxide and hydrogen chloride contained in the exhaust gas due to gas-liquid contact between the absorbing liquid S sprayed from the spray nozzle 9 and the exhaust gas 1, An acidic gas such as hydrogen fluoride is absorbed on the droplet surface of the absorbing liquid S.
- the absorption tower 4 is provided with a gas blow-off prevention member 19 around the entire side wall of the absorption tower 4, and as shown in FIG. Is directed toward the center of the absorption tower 4 so that the drift of the exhaust gas 1 can be eliminated and a short path of the exhaust gas 1 can be prevented.
- the flow direction of the absorption liquid S flowing down along the side wall of the absorption tower 4 is changed by the gas blow-off prevention member 19 provided in the middle of the side wall. Respray to the center.
- the gas-liquid contact efficiency between the exhaust gas 1 and the absorption liquid S can be increased by preventing the drift of the exhaust gas 1 and the re-scattering of the absorption liquid S to the center of the absorption tower by the gas blow-off prevention member 19 described above.
- the gas blow-off preventing member 19 has a plurality of portions 19 a provided with the weirs 23 and a plurality of portions 19 b not provided with the weirs 23, and the absorbent S flowing down to the portions 19 a provided with the weirs 23. Flows toward the portion 19b where the weir 23 is not provided. 9 to 11 (b), in the portion 19b where the weir 23 is not provided, the collected absorbing liquid S becomes a liquid film 18 from the inner peripheral end of the gas blow-off preventing member 19, and the absorption tower 4 It flows down inside.
- the portion where the liquid film 18 is formed is a portion 19b where the weir 23 is not provided, and the liquid film 18 is not formed on the portion 19a where the weir 23 is provided.
- 18 is discontinuous in the inner circumferential direction of the absorption tower 4.
- FIG. 12 is a horizontal sectional view showing the inside of the absorption tower according to Example 2 of the present invention.
- the difference from the first embodiment is that, in the circumferential direction of the gas blow-off prevention member 19, the inner total length L1 of the portion 19a to which the weir 23 is attached is equal to the total inner length of the portion 19b without the weir 23.
- the point is longer than the length L2 (L1> L2).
- FIG. 13 shows an absorption tower according to the second embodiment (product of the present invention), an absorption tower (conventional product 2) provided with a gas blow-off prevention member without a weir at the inner peripheral end, and a gas blow-off prevention member.
- the black triangle mark indicates an absorption tower according to Example 2 of the present invention (the present invention product)
- the white circle mark indicates an absorption tower provided with a gas blow-off prevention member without a weir at the inner peripheral end (conventional product 2).
- the black circles indicate an absorption tower (conventional product 1) in which no gas blow-off prevention member is installed.
- the product of the present invention has a slight pressure loss as compared with the conventional product 1, but there is no pressure loss like the conventional product 2, and the contact efficiency between the exhaust gas and the absorbing liquid is good and a high desulfurization effect is obtained. .
- FIG. 14 is a horizontal sectional view showing the inside of the absorption tower 4 according to Example 3 of the present invention.
- the difference from the absorption tower 4 according to the first embodiment shown in FIG. 1 is that the position of the weir 23 installed on the gas blow-off prevention member 19 is shifted by about 45 degrees in the circumferential direction from the absorption tower 4 shown in FIG.
- a portion 19a provided with a weir 23 is disposed above the side wall of the absorption tower 4 where the gas inlet 3 is formed.
- the lateral width of the weir 23 is slightly narrower than the lateral width of the gas inlet portion 3, but the lateral width of the weir 23 may be substantially the same as or slightly longer than the lateral width of the gas inlet portion 3.
- FIG. 15 is an enlarged horizontal sectional view showing the inside of the absorption tower 4 according to Embodiment 4 of the present invention
- FIG. 16 is a vertical view during operation of the wet flue gas desulfurization apparatus near the gas blow-off prevention member 19 installed in the absorption tower 4. It is an expanded sectional view.
- the weir 23 is attached to the entire inner peripheral portion of the gas blow-off prevention member 19 and is continuous between the side wall of the absorption tower 4 and the gas blow-off prevention member 19 (this embodiment) or discontinuous.
- the gap 26 is formed.
- the drift of the exhaust gas 1 can be prevented by installing the gas blowout prevention member 19, and the exhaust gas 1 is guided to the center of the absorption tower 4 and the inner surface of the side wall of the absorption tower 4.
- the absorbing liquid S that has flowed down through the gas is accumulated on the gas blow-off prevention member 19 once blocked by the weir 23, and the accumulated absorbing liquid S passes through the gap 26 and again flows down the side wall of the absorption tower 4. . Since the absorbing liquid S is accumulated on the gas blow-off preventing member 19, the exhaust gas 1 does not blow through the gap 26.
- FIG. 17 is an enlarged horizontal sectional view showing the inside of the absorption tower 4 according to Embodiment 5 of the present invention
- FIG. 18 is in operation of the wet flue gas desulfurization apparatus near the porous gas blow-off preventing member 21 installed in the absorption tower 4.
- a porous gas blow-off prevention member 21 having a large number of spray holes 24 formed on the entire surface is used, and a weir 23 is attached to the inner peripheral portion of the porous gas blow-off prevention member 21. It has been.
- the absorbing liquid S that has flowed down along the inner surface of the side wall of the absorption tower 4 is accumulated on the porous gas blow-off preventing member 21 once blocked by the weir 23.
- the absorbing liquid S is sprayed again from the spray hole 24 and does not form a continuous liquid film. Therefore, the flow of the exhaust gas 1 is not limited by the liquid film, and an increase in pressure loss can be suppressed. Also in this embodiment, since the absorbing liquid S is accumulated on the gas blow-off preventing member 21, the exhaust gas 1 does not blow through the spray holes 24.
- the porous gas blow-off preventing member 21 is used, but the same effect can be obtained by forming the spray holes 24 on the lower side of the weir 23 using the flat gas blow-off preventing member 19.
- FIG. 19 is a horizontal sectional view showing the inside of the absorption tower 4 according to Embodiment 6 of the present invention
- FIG. 20 is a vertical sectional view showing the inside of the absorption tower 4
- FIG. 21 is a gas with a pipe attached to the absorption tower 4. It is a vertical expanded sectional view in the operation of the wet flue gas desulfurization apparatus near the blow-off preventing member 25.
- a gas blow-off prevention member 25 with a pipe provided with a large number of liquid return pipes 22 facing downward is used, and the inner peripheral end of the gas blow-off prevention member 25 with the pipe A weir 23 is erected on the part.
- the lower end of the liquid return pipe 22 extends further below the lowermost spray header 8.
- the absorbing liquid S that has flowed down along the inner surface of the side wall of the absorption tower 4 is accumulated on the gas blow-off preventing member 25 once blocked by the weir 23 and accumulated.
- S is individually returned to the absorption tower liquid reservoir 5 through the liquid return pipe 22 and does not form a continuous liquid film. Therefore, the flow of the exhaust gas 1 is not limited by the liquid film, and an increase in pressure loss can be suppressed. Also in this embodiment, since the absorbing liquid S is accumulated on the gas blow-off prevention member 25, the exhaust gas 1 does not blow through the liquid return pipe 22.
- the size of the space formed by the side wall of the absorption tower 4 and the gas blow-out prevention members 19, 21, 25 and the weir 23 is such that when the absorbing liquid S accumulates in these spaces, The absorption liquid S is designed so as not to fall over the weir 23 and become a liquid film.
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- Environmental & Geological Engineering (AREA)
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Abstract
Description
同図において、火力発電所や工場等に設置されるボイラ等から排出された排ガス1は、ガス入口部3から吸収塔4に導入される。吸収塔4は塔下部の吸収塔液溜部5と塔上部の吸収部6から主に構成され、吸収塔液溜部5には、ボイラ等からの排ガス1に含まれる硫黄酸化物の量に応じて、石灰石スラリからなる吸収液Sがスラリ流量調整弁16の開度を調整することにより適量供給される。
前記ガス吹き抜け防止部材の内周端部に、そのガス吹き抜け防止部材の周方向に沿って不連続に堰を設けたことを特徴とするものである。
前記ガス吹き抜け防止部材の内周端部全体に連続した堰を設け、そのガス吹き抜け防止部材の外周端部と前記吸収塔の側壁内面の間に隙間を形成したことを特徴とするものである。
前記ガス吹き抜け防止部材の内周端部全体に連続した堰を設け、そのガス吹き抜け防止部材または前記堰の下部に、当該ガス吹き抜け防止部材上に溜まった吸収液を散布する散布孔を形成したことを特徴とするものである。
前記ガス吹き抜け防止部材の内周端部全体に連続した堰を設け、そのガス吹き抜け防止部材に、当該ガス吹き抜け防止部材上に溜まった吸収液を前記液溜部に戻す液戻し管を接続したことを特徴とするものである。
前記吸収塔の側壁内面に周方向に沿って取り付けラグが当該吸収塔の側壁に固定され、そのラグの上に前記ガス吹き抜け防止部材が載置されて、当該ガス吹き抜け防止部材が前記ラグに固定されて前記吸収塔の側壁には固定されていないことを特徴とするものである。
Claims (6)
- 塔の下部に設けられて吸収液を溜める液溜部と、その液溜部の上方に設けられて前記吸収液を噴霧する複数段のスプレヘッダを有する吸収部と、前記液溜部にある吸収液を前記スプレヘッダに循環する吸収液循環系統と、前記液溜部と吸収部の間の側壁に設けられた排ガス入口部と、その排ガス入口部から最上段の前記スプレヘッダの間の側壁内面全周にわたって設けられたガス吹き抜け防止部材を備えた吸収塔を有する湿式排煙脱硫装置において、
前記ガス吹き抜け防止部材の内周端部に、そのガス吹き抜け防止部材の周方向に沿って不連続に堰を設けたことを特徴とする湿式排煙脱硫装置。 - 請求項1に記載の湿式排煙脱硫装置において、前記ガス吹き抜け防止部材の内周端部に設けられた堰のトータルの長さが、ガス吹き抜け防止部材の内周端部の堰を設けない部分のトータルの長さよりも長いことを特徴とする湿式排煙脱硫装置。
- 塔の下部に設けられて吸収液を溜める液溜部と、その液溜部の上方に設けられて前記吸収液を噴霧する複数段のスプレヘッダを有する吸収部と、前記液溜部にある吸収液を前記スプレヘッダに循環する吸収液循環系統と、前記液溜部と吸収部の間の側壁に設けられた排ガス入口部と、その排ガス入口部から最上段の前記スプレヘッダの間の側壁内面全周にわたって設けられたガス吹き抜け防止部材を備えた吸収塔を有する湿式排煙脱硫装置において、
前記ガス吹き抜け防止部材の内周端部全体に連続した堰を設け、そのガス吹き抜け防止部材の外周端部と前記吸収塔の側壁内面の間に隙間を形成したことを特徴とする湿式排煙脱硫装置。 - 塔の下部に設けられて吸収液を溜める液溜部と、その液溜部の上方に設けられて前記吸収液を噴霧する複数段のスプレヘッダを有する吸収部と、前記液溜部にある吸収液を前記スプレヘッダに循環する吸収液循環系統と、前記液溜部と吸収部の間の側壁に設けられた排ガス入口部と、その排ガス入口部から最上段の前記スプレヘッダの間の側壁内面全周にわたって設けられたガス吹き抜け防止部材を備えた吸収塔を有する湿式排煙脱硫装置において、
前記ガス吹き抜け防止部材の内周端部全体に連続した堰を設け、そのガス吹き抜け防止部材または前記堰の下部に、当該ガス吹き抜け防止部材上に溜まった吸収液を散布する散布孔を形成したことを特徴とする湿式排煙脱硫装置。 - 塔の下部に設けられて吸収液を溜める液溜部と、その液溜部の上方に設けられて前記吸収液を噴霧する複数段のスプレヘッダを有する吸収部と、前記液溜部にある吸収液を前記スプレヘッダに循環する吸収液循環系統と、前記液溜部と吸収部の間の側壁に設けられた排ガス入口部と、その排ガス入口部から最上段の前記スプレヘッダの間の側壁内面全周にわたって設けられたガス吹き抜け防止部材を備えた吸収塔を有する湿式排煙脱硫装置において、
前記ガス吹き抜け防止部材の内周端部全体に連続した堰を設け、そのガス吹き抜け防止部材に、当該ガス吹き抜け防止部材上に溜まった吸収液を前記液溜部に戻す液戻し管を接続したことを特徴とする湿式排煙脱硫装置。 - 請求項1ないし5のいずれか1項に記載の湿式排煙脱硫装置において、
前記吸収塔の側壁内面に周方向に沿って取り付けラグが当該吸収塔の側壁に固定され、そのラグの上に前記ガス吹き抜け防止部材が載置されて、当該ガス吹き抜け防止部材が前記ラグに固定されて前記吸収塔の側壁には固定されていないことを特徴とする湿式排煙脱硫装置。
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US13/639,707 US20130020730A1 (en) | 2010-04-07 | 2011-04-07 | Wet Flue Gas Desulfurization Device |
KR1020127027570A KR101473285B1 (ko) | 2010-04-07 | 2011-04-07 | 습식 배연 탈류 장치 |
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CN105879588A (zh) * | 2016-05-19 | 2016-08-24 | 大唐环境产业集团股份有限公司 | 双循环变径脱硫吸收系统及方法 |
CN111655357A (zh) * | 2018-01-30 | 2020-09-11 | 三菱日立电力系统株式会社 | 脱硫系统 |
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JP5998915B2 (ja) * | 2012-12-19 | 2016-09-28 | 富士電機株式会社 | 排ガス処理装置 |
US10375901B2 (en) | 2014-12-09 | 2019-08-13 | Mtd Products Inc | Blower/vacuum |
JP2017070389A (ja) * | 2015-10-06 | 2017-04-13 | 富士フイルム株式会社 | モールドの製造方法およびパターンシートの製造方法 |
CN106731591A (zh) * | 2017-01-23 | 2017-05-31 | 浙江菲达环保科技股份有限公司 | 两级循环分区脱硫塔 |
KR102460014B1 (ko) * | 2018-08-24 | 2022-10-26 | 삼성전자주식회사 | 반도체 패키지 |
KR102620035B1 (ko) * | 2019-03-29 | 2023-12-29 | 미츠비시 파워 가부시키가이샤 | 배연 탈황 장치 |
JP2022043877A (ja) * | 2020-09-04 | 2022-03-16 | 富士電機株式会社 | 排ガス処理装置 |
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US20130020730A1 (en) | 2013-01-24 |
DE112011101262B4 (de) | 2015-10-22 |
PL402614A1 (pl) | 2014-01-20 |
KR20130001281A (ko) | 2013-01-03 |
JP5725725B2 (ja) | 2015-05-27 |
KR101473285B1 (ko) | 2014-12-16 |
DE112011101262T5 (de) | 2013-05-02 |
JP2011218273A (ja) | 2011-11-04 |
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