JP2004195394A - Flue gas desulfurization apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flue gas desulfurization apparatus excellent in desulfurization efficiency, in which the operationable time for every desulfurization unit is longer than that of conventional fixed type desulfurization apparatuses. <P>SOLUTION: The desulfurization apparatus recovering particles for desulfurization to recycle it after removing sulfur oxides in the flue gas by bringing a particle group for desulfurization wetted by addition of water into contact with flue gas is provided with a desulfurization device removing sulfur oxides from flue gas by making flue gas pass through in the state of housing the wetted particle group and by reacting sulfur oxides in flue gas with the surfaces of the particle for desulfurization to stick and bond sulfur oxides to the surface so as to form thin films; a separator which is installed at the lower part of the desulfurization device and in which the thin films are broken by friction and collision of the particles each other to separate the thin films from the particles while the particles adhered with the thin films gradually moving downward by vibration; a water supplying device supplying water to the particle group; and a recovering device which is installed at the lower part of the separator and which recovers the particles which has removed of the thin films into the desulfurization device to recycle them. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a flue gas desulfurization facility, in particular, contacts with flue gas at a desulfurization particle group wetted by water to remove sulfur oxides in the flue gas, and then collects and reuses the desulfurization particles. It relates to flue gas desulfurization equipment.
[0002]
[Prior art]
One of the conventional flue gas desulfurization methods for removing sulfur oxides from combustion flue gas from boilers and the like is a method for removing sulfur oxides in flue gas using wet desulfurization particles, for example, calcium carbonate (limestone) particles. (SO ₂ , SO _3, etc.) to form a thin film of calcium sulfate or calcium sulfite on the surface of the calcium carbonate particles, thereby removing the sulfur oxides from the flue gas. The flue gas desulfurization equipment to which this method is applied is mainly divided into two types: fixed type and flow type.
[0003]
The flue gas desulfurization equipment 1 shown in FIG. 1 is a fixed type example. When desulfurization is to be performed from flue gas by the flue gas desulfurization equipment 1, first, the valve 11 is opened and unhydrolyzed desulfurization particles, for example, calcium carbonate particles 121 are supplied from the particle accumulation tank 12 into the desulfurization chamber 13. Then, the water is supplied to the calcium carbonate particle group 121 by the water supply device 14 provided above the desulfurization chamber 13 to wet the calcium carbonate particle group 121, and then the valves 15A and 15B are opened to remove the flue gas. A desulfurization step of performing desulfurization from 151 through the calcium carbonate particle group 121, the sieve 16, the branch passage 152, and the flue 17 in order and then exhausting to the outside can be performed. After the operation for a predetermined time, the valves 15A and 15B are closed, and the vibrator 18 provided on the lower surface of the sieve 16 is operated to vibrate the particle group 121 in the desulfurization chamber 13, and The calcium sulfate thin film formed on the surface of the calcium carbonate particle 121 is crushed and separated from the calcium carbonate particle 121 by friction or collision between the particles, and then the valves 15C and 15D are opened. The process of regenerating the calcium carbonate particles 121 for collecting and removing the substances from the desulfurization chamber 13 is performed. After finishing the regeneration step, the unhydrated calcium carbonate particles 121 are captured from the particle accumulation tank 12 into the desulfurization chamber 13, and subsequently, the water is supplied to the calcium carbonate particle group 121 by the water supply device 14, The desulfurization step can be performed again. Since the flue gas desulfurization equipment 1 usually includes a plurality of the desulfurization chambers 13, the step of regenerating the desulfurization particles can be performed in the plurality of desulfurization chambers 13 one by one. During, the desulfurization step can be continued.
[0004]
In the flue gas desulfurization equipment 1, the desulfurization particles 121 do not move when moving through the desulfurization process, that is, are stationary, so that the equipment is simple and effective, but once the desulfurization particle group 121 If the accumulation is too thick, the resistance of the smoke exhaust passage becomes large, the smoke exhaust becomes difficult to pass through the particle group 121, and the vibration effect at the time of regeneration does not reach the upper layer particles, and the thin film separation effect is deteriorated. Because of the various problems described above, the amount of the particles for desulfurization to be deposited is considerably limited, so that the use time of the desulfurization chamber 13 is short and the regeneration step must be performed frequently.
[0005]
The flue gas desulfurization equipment 2 shown in FIG. 2 is an example of a flow type. The flue gas desulfurization facility 2 includes a plurality of parallel desulfurization towers 20. During the course of the desulfurization step, a group of calcium carbonate particles 21 as desulfurization particles wetted by water flows continuously from the top to the bottom of each of the desulfurization towers 20 in the plurality of desulfurization towers 20. . Simultaneously with the flow of the particle group 21, the flue gas enters through the inlet 22, breaks into the flowing particle group 21 and passes therethrough, performs desulfurization, and then exhausts to the outside through the gap 23 between the desulfurization towers 20. are doing.
[0006]
The flue gas desulfurization equipment 2 that performs desulfurization with the flowing particles has a long operable time, but performs desulfurization in a state where the particles flow, so that the desulfurization occurs due to friction or collision between the particles during the flow. The thin film formed on the surface of the particles for use is crushed and separated from the particles for desulfurization, and the crushed material of the thin film is discharged to the outside together with the exhaust gas after desulfurization to block the outlet of the exhaust gas or carry over to the outside air. Thus, there is a disadvantage that the desulfurized exhaust gas is contaminated.
[0007]
[Problems to be solved by the invention]
In view of the above, it is an object of the present invention to provide a conventional flow type that has no problems such as a carry-over or a blockage of an exhaust gas outlet, and that the operating time of each desulfurization unit is considerably longer than that of the conventional fixed type. It is to provide a desulfurization facility.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the inventor firstly removes sulfur oxides in flue gas by bringing the desulfurizing particle group wet with water into contact with flue gas, and then recovers the desulfurizing particles. In the flue gas desulfurization equipment to be reused, passing the flue gas in a state containing the wet desulfurization particle group, reacting the sulfur oxide in the flue gas with the surface of the desulfurization particles A desulfurization device that adheres and bonds to form a thin film and removes sulfur oxides from the flue gas, and a desulfurization device that is provided below the desulfurization device and vibrates to lower the desulfurization particles to which the thin film is attached. While gradually moving, the thin film is crushed by friction or collision between the desulfurization particles, a separation device for separating from the desulfurization particles, a water supply device for supplying water to the desulfurization particle group, and below the separation device. Provided and before Providing flue gas desulfurization equipment, characterized in that the desulfurization particles to remove thin films formed by a collecting device to collect and recycle in the desulfurization apparatus.
[0009]
Since the flue gas desulfurization equipment according to this configuration performs the desulfurization step without moving the particle group, there is no problem such as blocking the outlet of the carryover or the flue gas, and the particles are mutually flowing in the regeneration step in the regeneration step. Since the thin film is crushed and crushed and separated from the particles for desulfurization, the separating effect of the thin film is good even if a large amount of the particles for desulfurization are accommodated in the desulfurization device.
[0010]
The desulfurization apparatus includes a housing and a plurality of desulfurization towers arranged in parallel in the housing with a gap in the left-right direction, with the housing partitioned into two chambers, a front chamber and a rear chamber. An inlet for exhaust gas is provided toward the front chamber, an outlet for exhaust gas is provided toward the rear chamber, and the plurality of desulfurization towers each include the wet desulfurization particles. A vertical frame that holds and holds the group as an upright wall (or an upright fence) and that opens the left and right side walls of the desulfurization particle group such as the upright wall to the smoke exhaust in the housing. Is preferred. Thereby, after the flue gas enters from the entrance, it enters the gap between the plurality of desulfurization towers and passes from one of the left and right side walls of the desulfurization particle group held by the vertical frame to the other. However, since it is possible to exit via the outlet, even if a large amount of desulfurization particles are accumulated in the standing frame, the thickness of the desulfurization particle group does not change at all by holding the standing frame, The resistance to smoke exhaust does not increase as in the conventional fixed type. That is, since the flue gas desulfurization equipment of the present invention can deposit a large amount of desulfurization particles in the desulfurization tower as the desulfurization unit, the operable time of each desulfurization unit is much longer than that of the conventional fixed type.
[0011]
Each of the plurality of desulfurization towers has a pair of standing frames that are left and right opposed to each other with a gap between a pair of front and rear standing plates, and the rear standing plate is all other members. A plurality of gated openings communicating with a passage formed by a gap between the pair of standing frames of each of the desulfurization towers. Is preferred. Thereby, the flue gas that has passed through the desulfurization particle group held in one of the pair of standing frames after entering the gap between the plurality of desulfurization towers is first passed through the passage between the pair of standing frames. It can enter, pass through the gated opening and only exit through the exit. Further, after the operation for a predetermined time, when attempting to regenerate some of the desulfurization towers in the plurality of desulfurization towers, close the gated opening between the pair of vertical frames of each of the desulfurization towers. Since the flue gas into some of the desulfurization towers can be stopped and the flue gas can be circulated only to the remaining desulfurization towers, the other remaining desulfurization towers can recycle the flue gas during regeneration of some of the desulfurization towers. The desulfurization step can be continued.
[0012]
In addition, it is preferable that the vertical frame is formed by vertically arranging a plurality of flat plate sets including two opposing flat plates in which a space therebetween is gradually developed from bottom to top with a gap therebetween. Thereby, the smoke exhaust can permeate from one surface of the wall of the desulfurization particle group to the other surface via the gap between the upper and lower flat plate assemblies. Further, it is preferable that the flat plate is configured such that an upper edge thereof is warped upward and a lower edge thereof is warped downward. Thereby, the structural strength of the flat plate is increased, and the desulfurizing particle group can be stably held on the vertical frame, and the desulfurizing particles can be stuck between a plurality of desulfurizing towers via a gap between the upper and lower flat plate assemblies. It is also possible to avoid falling into the passage between the standing frames.
[0013]
The flue gas desulfurization equipment further includes a particle supply device that supplies the wet desulfurization particles into the upright frames of the plurality of desulfurization towers, respectively, and the separation device is provided directly below the plurality of desulfurization towers, respectively. A plurality of sieves that are provided diagonally and whose meshes are smaller than the particles for desulfurization, and include a plurality of vibrators that respectively vibrate the plurality of sieves, wherein the water supply device is provided for each of the standing frames. A first water supply provided above and supplying water to the desulfurization particles held by the vertical frame, and a second water supply provided above each sieve and supplying water to the sieve And preferably As a result, the particle supply to each desulfurization tower, the wetting operation, and the regeneration step can be performed independently, so that the desulfurization step is continuously performed on the other desulfurization towers during the regeneration of the desulfurization particles of some desulfurization towers. Can be.
[0014]
The recovery device is provided at a lower end side of the sieve, and a particle recovery unit that recovers the desulfurization particles from which the thin film has been removed and transports the particles into the vertical frame, and is provided directly below the sieve. Preferably, the apparatus further comprises a collecting means for collecting the crushed thin film dropped from the sieve and water (or supplied water). Thereby, the particles for desulfurization can be collected and reused.
[0015]
In addition, the collecting means comprises a collecting tank, and near the collecting tank, also guides the upper water layer of the collecting tank to remove the turbid liquid consisting of the crushed material of the thin film and the water supply. It is preferable to have a filtration device for removing the crushed material from the feed water by filtration, and an elimination device for removing the crushed material of the thin film settled on the bottom surface of the collection tank to the outside. Further, the filtered water supply can be directly discarded to the outside, or collected in the water supply device and reused.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the flue gas desulfurization equipment of the present invention will be described in detail with reference to the drawings. In the following description, components having substantially the same function and configuration will be denoted by the same reference numerals, regardless of their size, and repeated description will be made only when necessary.
[0017]
The flue gas desulfurization equipment 3 of the present invention removes sulfur oxides in flue gas by bringing the desulfurization particle group wet with water into contact with combustion flue gas from a boiler or the like, and then recovers the desulfurization particles. And reuse it. As shown in FIG. 3, the flue gas desulfurization equipment 3 mainly includes a particle supply device 4, a desulfurization device 5, a separation device 6, a water supply device 7, a recovery device 8, a filtration device 9, a rejection device 10 Consists of More specifically, as shown in FIGS. 3 and 4, the particle supply device 4 includes a storage tank 41 storing desulfurization particles 31 such as calcium carbonate wetted by water, and a storage tank 41. A horizontal transport pipe 42 and a vertical transport pipe 43 for transporting the desulfurization particles 31 stored in the storage tank 41 from below the storage tank 41 to above the desulfurization apparatus 5, and communicates with the horizontal transport pipe 42 and the vertical transport pipe 43. A particle supply means 44 for supplying and filling the desulfurization particles 31 transported to above the desulfurization device 5 into the desulfurization device 5; and a desulfurization particle 31 surplus supplied to the desulfurization device 5. And a particle circulating pipe 45 for circulating the particles into the storage tank 41.
[0018]
The particle supply means 44 includes a particle supply pipe 441 having both ends communicating with the vertical transport pipe 43 and the particle circulating pipe 45, respectively, and a lower surface of the particle supply pipe 441 in a left-right direction (axial direction). The apparatus includes a plurality of particle supply devices 442 arranged in parallel with a gap, and a plurality of gated openings 443 provided between the particle supply pipe 441 and the plurality of particle supply devices 442, respectively.
[0019]
The desulfurization device 5 includes a housing 51 provided below the plurality of particle supply devices 442 of the particle supply device 4 and a horizontal direction inside the housing 51 corresponding to the plurality of particle supply devices 442. A plurality of desulfurization towers 52 are arranged side by side with a gap therebetween and partition the housing 51 into two chambers, a front chamber 511 and a rear chamber 512.
[0020]
A smoke exhaust inlet 5110 is provided in the front chamber 511 of the housing 51, and a smoke exhaust outlet 5120 is provided in the rear chamber 512. As shown in FIGS. 4 and 5, each of the plurality of desulfurization towers 52 has a pair of standing frames 524, 524 that are opposed to each other with a gap 523 between a pair of front and rear standing plates 521, 522. To be erected. The pair of upright frames 524 and 524 hold the desulfurizing particles 31 like an upright wall and hold the same, and the left and right side walls of the desulfurizing particle group such as the upright walls in the housing 51 are provided with smoke exhaust. It is open to the public. The rear standing plates 522 of the respective desulfurization towers 52 are connected to and integrated with the rear standing plates 522 of all the other desulfurization towers 52, respectively. Are provided with a plurality of gated openings 5220 that respectively communicate with a passage formed by a gap 523 between the vertical frames 524 and 524.
[0021]
Each of the pair of standing frames 524 and 524 is configured by vertically arranging a plurality of flat plate sets 5240 with a gap. Each of the plurality of flat plate sets 5240 includes two opposing flat plates 5241 in which a space therebetween is gradually developed from bottom to top. In the present embodiment, as shown in FIG. 6, the flat plate 5241 warps upward so that its upper edge is at 75 degrees with the horizontal plane, and warps downward so that its lower edge is at 75 degrees with the horizontal plane. In addition, between the pair of front and rear standing plates 521 and 522, a plurality of partition plates 525 parallel to the standing plates 521 and 522 are arranged in parallel so as to divide the plurality of flat plate sets 5240 into front and rear equal distances. . Referring to FIG. 5 in more detail, each of the plurality of flat plates 5241 is continuously formed in front of and behind a small flat plate 5242 sandwiched between the plurality of partition plates 525. Further, the partition plate 525 has a plurality of through holes 5250 communicating with the gap 523 between the pair of upright frames 524 and 524 and the particle accumulation space of the upright frame 524, respectively.
[0022]
As shown in FIGS. 4 and 7, the separation device 6 is provided diagonally from the upper right to the lower left just below the plurality of desulfurization towers, and their mesh is smaller than the desulfurization particles 31. A plurality of main sieves 61 and a plurality of sub-sieves 62 which are provided diagonally from the upper left to the lower right above the plurality of main sieves 61 and whose meshes are smaller than the desulfurization particles 31; A plurality of vibrators 63 are provided below the plurality of main sieves 61 and the sub-sieves 62 and vibrate the plurality of sieves 61 and 62, respectively, and another vibrator 63 adjacent to the plurality of sub-sieves 62 from the lower end side. Below the main sieve 61, the main sieve 61 and a plurality of baffles 64 extending in parallel with each other.
[0023]
As shown in FIGS. 4 and 7, the water supply device 7 is provided above the vertical frame 524 for each of the particle feeders 442, and supplies water to the desulfurization particle group held by the vertical frame 524. And a second water supply device 72 provided above each of the sieves 61 and 62 to supply water to the sieves 61 and 62.
[0024]
The collecting device 8 includes a particle collecting means 81 and a collecting means 82 as shown in FIGS. It should be noted that the particle collecting means 81 utilizes some members in the particle supply device 4. That is, the particle collecting means 81 is provided at a lower end side of each of the main sieves 61 and includes a plurality of collecting tanks 810 for collecting the desulfurizing particles 31. The lower surfaces of the plurality of recovery tanks 810 communicate with the horizontal transport pipe 42 of the particle supply device 4. Thereby, the recovered desulfurization particles 31 can be transported to the particle supply means 44 via the horizontal transport pipe 42 and the vertical transport pipe 43.
[0025]
The collecting means 82 is provided immediately below the plurality of main sieves 61 and includes a collecting tank 820 for collecting the crushed material of the following thin film dropped from the main sieve 61 and the sub-sieve 62 and water supply.
[0026]
Hereinafter, the process of performing the desulfurization step and the particle regeneration step by the flue gas desulfurization equipment of the present invention will be described with reference to FIGS. 3, 4, and 9. First, when a desulfurization process of flue gas is to be performed, a plurality of gated openings 443 between the plurality of particle supply devices 442 and the particle supply pipes 441 are opened, and the horizontal transport pipes 42 and After transporting the wet desulfurization particles 31 such as calcium carbonate via the vertical transport pipe 43 to the plurality of particle feeders 442, a pair of desulfurization towers 52 of each desulfurization tower 52 via the triangular prism guide member 444. It falls into the frame 524 and accumulates like an upright wall, and opens the smoke exhaust port 5110. At this time, after the smoke exhaust enters the entrance 5110 as shown in FIG. After passing through the gap between the desulfurization towers 52 and passing from one of the left and right wall surfaces of the desulfurization particle group held by the vertical frame 524 to the other, and performing desulfurization, Stand enters the passage 523 between the frames 524,524 through the gated opening 5220, you can exit via the outlet 5120. The wet desulfurization particles 31 react with sulfur oxides (SO ₂ , SO _3, etc.) in the flue gas, and then form a calcium sulfate or calcium sulfite thin film on the surface thereof.
[0027]
Then, after a certain period of operation, for example, when trying to regenerate some of the desulfurization towers (for example, desulfurization tower A) among the plurality of desulfurization towers, first, as shown in FIG. The gated opening 5220 of A is closed to stop the flue gas into the desulfurization tower A, and the flue gas is circulated only to the remaining desulfurization towers B, C, and the like. , 72 are opened and the plurality of vibrators 63 below the desulfurization tower A are operated to shake the sieves 61, 62, while gradually moving the desulfurizing particles 31 to which the thin film adheres downward. The thin film can be broken by friction or collision between the desulfurizing particles 31 and separated from the desulfurizing particles 31. Further, in order to accurately drop the desulfurizing particles 31 onto the main sieve 61 and the sub-sieve 62, a plurality of guides are provided between the main sieve 61 and the sub-sieve 62 and the pair of standing frames 524, 524. A plate 526 is provided.
[0028]
The regenerated desulfurization particles 31 fall along the slope of the main sieve 61 into the recovery tank 810, and are circulated to the particle feeder 442 above the desulfurization tower A via the horizontal and vertical transport pipes 42 and 43. can do. The crushed calcium sulfate thin film and water supplied from the sieves of the main sieve 61 and the sub-sieve 62 can fall into the collecting tank 820. At this time, the crushed material of the thin film whose density is smaller than the density of water floats on the water surface, and the crushed material of the thin film whose density is larger than the water density sinks to the bottom of the collection tank 820 and becomes a sediment. In this embodiment, the upper water layer of the collection tank 820 is transported to a filtration device 9 described below via a guide plate 91 to remove the crushed material from the water supply and recover the water supply. The sediment of the crushed material that has settled on the bottom surface of the collection tank 820 is removed to the outside via a removal device 10 described below.
[0029]
As shown in FIG. 3, the filtration device 9 includes a water supply recovery tank 92 provided near the collection tank 820 and a water supply recovery tank 92, and the mesh is smaller than the crushed material. , And the guide plate 91 for guiding the upper aqueous layer of the collection tank 820 onto the filtration cloth 93. Thereby, the turbid liquid composed of the crushed material of the thin film collected in the upper layer of the collection tank 820 and the water supply is filtered to remove the crushed material from the water supply, and the water supply is directly discarded to the outside, or The water is supplied to the water supply device 7 so that it can be reused.
[0030]
Then, as shown in FIG. 3 and FIG. 8, the rejecting device 10 is connected to a first screw conveyor 101 for receiving the sediment on the bottom surface of the collection tank 820, and one end thereof is connected to the first screw conveyor 101. And the second screw conveyor 102 having the other end standing upright so as to be higher than the collection tank 820. Thereby, by the operation of the motor, the sediment of the crushed thin film that has settled on the bottom surface of the collection tank 820 can be removed to the outside via the first screw conveyor 101 and the second screw conveyor 102. . In addition, since the other end of the second screw conveyor 102 is higher than the height of the collection tank 820, sediment of the crushed material of the thin film is eliminated, but water supply is not eliminated.
[0031]
【The invention's effect】
Since the flue gas desulfurization equipment according to this configuration performs the desulfurization step without moving the particle group, there is no problem such as the above-mentioned flow-type carryover or blocking the exit of the flue gas, and the particles are not allowed to flow in the regeneration step. The thin film is crushed and collides with each other in the state, and the thin film is crushed and separated from the desulfurizing particles. Therefore, even if a large amount of the desulfurizing particles are contained in the vertical frame, the effect of separating the thin film is good. Further, because the smoke exhaust passes from one of the left and right side walls of the desulfurization particle group to the other, even if a large amount of desulfurization particles accumulate in the vertical frame, the holding of the vertical frame causes the aforementioned Since the thickness of the desulfurization particle group does not change at all, the resistance of the exhaust gas passage does not increase as in the conventional fixed type. That is, the flue gas desulfurization equipment of the present invention has a good desulfurization effect, and the operable time for each desulfurization tower is much longer than that of the conventional fixed type. In addition, since a plurality of desulfurization towers which can be operated independently are provided, the desulfurization step can be continuously performed on other desulfurization towers during regeneration of the desulfurization particles of some desulfurization towers. In addition, in the regeneration process, the thin film is separated while supplying water to the desulfurization particles, so the thin film separation effect is good, and the desulfurization particles heated by the high-temperature flue gas are cooled or wet, and the desulfurization is performed. It is also possible to avoid scattering of ash dust from the working particles.
[0032]
The embodiments described above are intended to clarify the technical contents of the present invention, and the present invention is not limited to such specific examples and is not interpreted in a narrow sense. Various modifications can be made within the spirit and scope of the claims.
[Brief description of the drawings]
FIG. 1 is an explanatory view schematically showing a part of a conventional fixed-type flue gas desulfurization facility.
FIG. 2 is an explanatory view schematically showing a part of a conventional fluidized flue gas desulfurization facility.
FIG. 3 is a structural perspective view of a preferred embodiment of a flue gas desulfurization facility of the present invention.
FIG. 4 is a partially enlarged cross-sectional view taken along the line II of FIG. 3;
FIG. 5 is an exploded perspective view of the desulfurization tower in the embodiment.
FIG. 6 is an enlarged explanatory view of a flat plate constituting the desulfurization tower.
FIG. 7 is a partially enlarged perspective view of the embodiment.
FIG. 8 is another partially enlarged perspective view of the embodiment.
FIG. 9 is a sectional view taken along line II-II in FIG. 3;
[Explanation of symbols]
3 flue gas desulfurization equipment, 31 particles for desulfurization, 4 particles supply device, 5 desulfurizer, 51 housing, 511 front chamber, 5110 entrance, 512 rear chamber, 5120 outlet, 52 desulfurization tower , 521, 522: Standing plate, 5220: Opening with gate, 524: Standing frame, 5240: Flat plate assembly, 5241: Flat plate, 6: Separation device, 61, 62: Sieve, 63: Vibrator, 7: Water supply device, 71 1st water supply, 72 2nd water supply, 8 ... collection | recovery apparatus, 81 ... collection | recovery means, 82 ... collection | collection means, 9 ... filtration apparatus, 10 ... rejection apparatus.

Claims (7)

A flue gas desulfurization facility that removes sulfur oxides in the flue gas by contacting the desulfurization particles and the flue gas that have been wetted by water to collect and reuse the desulfurizing particles,
The flue gas is passed in a state in which the wet desulfurization particles are accommodated, and the sulfur oxide in the flue gas is reacted with the surface of the desulfurization particles to adhere and bond to form a thin film. A desulfurization device for removing sulfur oxides,
The thin film is provided below the desulfurization device, and crushes the thin film by friction or collision between the desulfurization particles while gradually moving the desulfurization particles to which the thin film adheres downward by vibration. Separation device for separating from the particles for use,
A water supply device for supplying water to the desulfurization particle group,
A flue gas desulfurization facility, comprising: a recovery device provided below the separation device, for recovering the desulfurization particles from which the thin film has been removed into the desulfurization device and reusing the particles. The desulfurization device includes a housing and a plurality of desulfurization towers that are arranged side by side in the housing with a gap in the left-right direction, and partition the housing into two chambers, a front chamber and a rear chamber,
An inlet for exhaust gas is provided toward the front room of the housing, and an outlet for exhaust gas is provided toward the rear room,
Further, the plurality of desulfurization towers,
A standing frame for holding the wet desulfurization particle group as an upright wall and holding the same, and opening left and right side walls of the desulfurization particle group such as the upright wall to smoke exhaust in the housing. ,
Thereby, after the flue gas enters from the entrance, it enters the gap between the plurality of desulfurization towers, passes through the desulfurization particle group held in the vertical frame, and exits through the outlet. The flue gas desulfurization equipment according to claim 1, wherein the desulfurization equipment can be used. In each of the plurality of desulfurization towers, a pair of the upright frames that are opposed to each other with a gap between a pair of front and rear uprights are erected, and the rear uprights are all other desulfurization. A plurality of gated openings communicating with a passage formed by a gap between the pair of standing frames of each desulfurization tower are provided on the surface thereof, and a plurality of openings with gates are provided. ,
Thereby, the flue gas that has passed through the desulfurization particle group held in one of the pair of standing frames after entering the gap between the plurality of desulfurization towers is first passed through the passage between the pair of standing frames. 3. The flue gas desulfurization facility according to claim 2, wherein the apparatus can enter, pass through the gated opening, and exit through the outlet for the first time. The vertical frame is formed by arranging a plurality of flat plate sets including two opposing flat plates in which a space therebetween gradually expands from bottom to top with a gap therebetween,
4. The flue gas desulfurization facility according to claim 2, wherein the flat plate has an upper edge warped upward and a lower edge warped downward. 5. Further comprising a particle supply device for supplying the wet desulfurization particles into the standing frame of each of the plurality of desulfurization towers,
The separation device is provided diagonally below each of the plurality of desulfurization towers, a plurality of sieves whose meshes are smaller than the particles for desulfurization, and a plurality of vibrators each vibrating the plurality of sieves. Consisting of
The water supply device is provided above each of the standing frames, a first water supply for supplying water to the desulfurization particles held by the standing frame, and provided above each of the sieves, The flue gas desulfurization facility according to claim 2 or 3, comprising a second water supply device for supplying water to the sieve. The recovery device is provided at the lower end side of the sieve, a particle recovery means for recovering the desulfurization particles from which the thin film has been removed and transporting the particles into the vertical frame, and provided under the sieve, The flue gas desulfurization equipment according to claim 5, further comprising a collecting means for collecting the crushed material of the thin film dropped from the sieve and the water supply. The collecting means comprises a collecting tank, and near the collecting tank, guides an upper water layer of the collecting tank, and filters a turbid liquid consisting of the crushed material of the thin film and the water supply. The flue gas desulfurization according to claim 6, further comprising: a filtration device for removing the crushed material from the water supply; Facility.

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