CN111921354A

CN111921354A - Integrated flue gas purification tower

Info

Publication number: CN111921354A
Application number: CN202010852987.5A
Authority: CN
Inventors: 马长永
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-22
Filing date: 2020-08-22
Publication date: 2020-11-13

Abstract

The invention belongs to the technical field of industrial flue gas purification, and relates to an integrated flue gas purification tower for flue gas desulfurization and dust removal of an urban domestic garbage incineration power plant. The invention realizes the two purification processes of flue gas desulfurization and dust removal in one tower by adopting the integrated innovative structural design of the semidry desulfurization reaction tower and the bag-type dust remover, achieves the purposes of compact design of equipment and reduction of occupied area of a flue gas treatment room, and can greatly reduce the overall manufacturing and installation cost of the equipment at the same time.

Description

Integrated flue gas purification tower

Technical Field

The invention relates to the technical field of industrial flue gas purification, in particular to an integrated flue gas purification tower for flue gas desulfurization and dust removal of an urban domestic garbage incineration power plant.

Background

The garbage incineration treatment has the obvious advantages of reduction, harmlessness and recycling and is widely applied in the domestic garbage treatment field at home and abroad. The heat generated by the household garbage through incineration is used for generating electricity or providing regional heat supply, and the slag generated after the garbage is combusted can be used for comprehensive utilization in the aspects of brick making, paving and the like; wherein the garbage is burntThe smoke generated by burning contains smoke dust particles and SO₂、NO_xAcid gases mainly comprising HCl and HF, heavy metals such as Pb, Hg and Cr and harmful pollutants such as dioxin, so that the acid gases are allowed to be discharged into the atmosphere after being subjected to harmless treatment and meeting the national environmental protection discharge standard.

In order to meet the requirements of flue gas emission, a waste incineration flue gas purification treatment system needs to adopt a desulfurization, denitrification and dust removal comprehensive purification process. Namely, SO in the flue gas is removed by a dry or semi-dry desulfurization process₂Acid gases such as HCl and HF; removing NOx gas pollutants in the flue gas by adopting an SNCR (selective non-catalytic reduction) or SCR (selective catalytic reduction) denitration process; the active carbon is sprayed in a tail flue in front of the dust remover to adsorb heavy metals and dioxin substances in the flue gas; and a bag-type dust collector is adopted to collect dust particles, heavy metals, dioxin and other pollutants in the flue gas to reach the flue gas emission index, and the flue gas is pressurized by a draught fan and then is discharged into the atmosphere through a chimney.

The current mainstream smoke purification process for waste incineration treatment is' SNCR (Selective non catalytic reduction) urea]+ semi-dry method [ Ca (OH)₂]+ Dry method [ Ca (OH)₂]+ activated carbon adsorption + bag dedusting + SCR [ urea ]]"comprehensive flue gas treatment system. Wherein only the SNCR denitration process adopts a method of spraying urea solution into a high-temperature region of the flue gas at the outlet of the hearth to realize the denitration reaction between the flue gas and the reducing agent; and the rest of the flue gas purification process equipment is arranged in the flue gas purification workshop of the incineration plant. High-temperature flue gas generated after the garbage incineration is subjected to heat energy recovery in the flue gas through a waste heat furnace, and then enters a flue gas purification system through a connecting flue; hot flue gas passes through a semidry reaction tower respectively, and desulfurization reaction is carried out in the hot flue gas, namely SO in the flue gas is removed₂Acid gases such as HCl and HF enter the bag-type dust collector through the connecting flue; a slaked lime powder and active carbon injection device is arranged on a connecting flue between the deacidification tower and the bag-type dust remover, and a certain amount of slaked lime powder and active carbon are injected, wherein the slaked lime powder and the flue gas further react to remove the residual SO in the flue gas₂HCl, HF and other acid gases, and the sprayed active carbon adsorbs heavy metal and dioxin in fume via adsorptionThe like substances are then put into a bag-type dust collector for dust removal, so that dust particles in the flue gas, reaction products of the deacidification tower, activated carbon adsorbates and the like are collected together; fly ash enters an ash bin through conveying equipment for storage, flue gas after dust removal enters an SCR (selective catalytic reduction) reaction tower, NOx in the flue gas in the SCR reaction tower and ammonia gas generated after pyrolysis of urea solution are subjected to denitration reduction reaction under the action of a catalyst to become harmless N₂And H₂And O gas, so that the flue gas denitration process is realized.

Wherein, the semi-dry deacidification tower and the bag-type dust collector for flue gas desulfurization need to occupy a large equipment installation space in a flue gas treatment room due to the purification process requirement, so that the design and arrangement of other process equipment become compact and inconvenient, and the occupied area investment is increased. Therefore, the effective space between the deacidification tower and the dust remover can be intentionally shortened, but the deacidification tower and the dust remover are designed by adopting independent steel structures and are also required by the processes of connecting a flue and arranging an active carbon injection port and the like, so the space between the deacidification tower and the dust remover cannot be too compact. Therefore, the technical problem of how to realize the functional design and compact arrangement of the desulfurization reaction tower and the dust remover needs to be solved urgently.

Disclosure of Invention

In view of the above, the present invention provides an integrated flue gas purification tower, which aims to realize two purification processes of flue gas desulfurization and dust removal in one tower by using an innovative integrated structure design of a semi-dry desulfurization reaction tower and a bag-type dust remover, so as to achieve the purposes of compact arrangement of equipment and reduction of occupied area of a flue gas treatment room, and simultaneously, substantially reduce the overall manufacturing and installation costs of the equipment.

In one embodiment of the present invention, an integrated flue gas cleaning tower is provided, comprising: the device comprises a steel frame, a flue gas inlet interface, a desulfurization reaction tower, a dust remover inlet branch flue, a dust remover unit, a middle box body, a dust remover outlet branch flue, a flue gas collecting flue, a flue gas outlet interface, a screw conveyor and a middle ash hopper. The steel frame is used for supporting other components such as the desulfurization reaction tower, the dust remover unit and the like.

For the integrated flue gas purification tower, in one possible implementation mode, the steel frame is installed on a civil engineering upright post support in the flue gas purification room and is fixedly connected with a civil engineering foundation in a bolt connection mode.

For the above-mentioned integrated flue gas purification tower, in a possible implementation manner, the purification tower is composed of one desulfurization reaction tower, and a plurality of dust remover units and the middle box body which are arranged on the same steel frame; the desulfurization reaction tower is arranged on the steel frame upper-layer beam through 4 supports, and the dust remover unit and the middle box body are arranged on the steel frame lower-layer beam.

For the integrated flue gas purification tower, in a possible implementation manner, the desulfurization reaction tower consists of a reaction tower body, a flue gas distributor, a rotary atomizer, a slaked lime injector, an activated carbon injector, a flue gas guide cone, a fixed support and a support ring.

The reaction tower body consists of a top plate, a cylindrical barrel and a conical ash bucket which are connected with each other in a welding way; wherein, the reaction tower body is connected and fixed with the crossbeam through 4 fixing supports.

Furthermore, the bottom of the conical ash bucket is provided with a plurality of installation openings of the dust remover inlet branch flues for connecting the dust remover inlet branch flues.

For the integrated flue gas purification tower, in one possible implementation mode, one end of the flue gas inlet interface is connected with a boiler outlet flue, and the other end of the flue gas inlet interface is connected with the volute-shaped flue of the flue gas distributor in a welding mode; the flue gas distributor is fixed on the top of the reaction tower through a support ring and is connected with the reaction tower body in a welding mode.

Furthermore, the smoke distributor is composed of a rotary volute type flue and a smoke guide blade inclining towards the center, and after passing through the smoke distributor, the horizontal flow direction of smoke is changed into a vertically downward uniform smoke flow, so that a good mixing condition is created for the gas-liquid two-phase desulfurization reaction.

For the above integrated flue gas purification tower, in one possible implementation, the dust remover unit comprises: the device comprises a box body cover plate, a pattern plate box, a dust removal box body, a filter bag, a bag cage, a dust collecting hopper, a dust falling pipe, an expansion joint, a gate valve and a blowing pipe group; the box body cover plate is arranged at the upper end of the card box and is used for installing and overhauling the filter bag and the bag cage; the box body cover plate and the pattern plate box are fixedly connected through a bolt pressing plate.

Furthermore, in the dust remover unit, the pattern plate box, the dust removing box body and the dust collecting hopper are hermetically connected in a welding mode; the upper end of the dust collection box is provided with a dust collection box body, and the lower end of the dust collection box body is provided with a dust collection hopper; the lower part of the ash collecting hopper is connected with the ash falling pipe, the expansion joint and the gate valve in sequence in a welding mode.

For the integrated flue gas purification tower, in a possible implementation mode, the cross section of the inlet branch flue of the dust remover is circular, the upper end of the inlet branch flue of the dust remover is connected with the opening of the flue at the lower part of the dust collecting hopper in a welding mode, and the lower end of the inlet branch flue of the dust remover is connected with each independent dust removing box body in a welding mode. And a metal compensator for absorbing the expansion amount of the flue is arranged on the branch flue at the inlet of the dust remover.

For the integrated flue gas purification tower, in a possible implementation manner, the bottom plate of the perforated plate box is provided with circular openings for installing filter bags with equal transverse and longitudinal intervals, and the filter bags and the bag cages are uniformly arranged in the dust removal box body after penetrating through the holes; the filter bag passes through the elasticity tight circle that rises of sack department joint in the card through-hole, its inside cooperation installation the bag cage.

For the integrated flue gas purification tower, in one possible implementation mode, the middle box body is arranged between the dust remover unit pattern plate boxes on the two sides and is communicated with the other side of the corresponding pattern plate box through one side of the opening; the middle box body is fan-shaped in cross section and is formed by welding an upper side top plate, a lower side top plate, a bottom plate, two side plates and an inner arc plate and an outer arc plate, wherein a circular opening is formed in the bottom plate and is used for being connected with the dust remover outlet branch flue.

Furthermore, a pneumatic poppet valve mounting seat and a circular opening for mounting a valve rod are arranged on the top plate corresponding to the circular opening of the bottom plate of the middle box body, and the valve rod of the pneumatic poppet valve is connected with a valve cover plate for opening and closing the circular smoke channel of the bottom plate after passing through the small hole of the top plate.

Furthermore, the side plate of the middle box body is communicated with the space of the smoke outlet at the upper part of the connected pattern plate box through the rectangular opening; the flue gas entering the dust removal box body through the inlet branch flue of the dust remover is subjected to gas-solid separation through the filter bag, the clean flue gas after dust removal enters the flower plate box through the filter bag, then enters the middle box body through the side plate of the middle box body, and enters the outlet branch flue and the collecting flue of the dust remover through the circular opening of the bottom plate.

For the integrated flue gas purification tower, in a possible implementation manner, when the filter bag in the dust collector unit needs to be blown, the corresponding pneumatic lift valve at the top of the middle box body firstly closes the flue gas outlet channel on the bottom plate of the middle box body, and then opens the pulse valve on the compressed air blowing pipe group to perform off-line blowing operation.

The dust, the desulfurization reaction products and the activated carbon adsorbate collected by the filter bags in the dust collector unit enter the dust collecting hopper for temporary storage, the fly ash at the bottom of the dust collecting hopper enters the spiral conveyor through the dust falling pipe, and the fly ash is transferred to the middle dust hopper and discharged out of the system under the slow pushing of the spiral conveyor arranged obliquely.

Further, the middle ash bucket consists of an ash bucket body, a gate valve and an electric scraper; the gate valve is connected with the ash bucket in a welding mode; the electric scraper conveyor driving motor device is arranged at the top of the ash bucket body, and the scraper is arranged inside the ash bucket to prevent agglomeration and hardening in the ash bucket in the fly ash discharge process.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments

As will become clear to the skilled person. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention

The limit of (2). Also, like reference numerals are used to refer to like parts throughout the drawings.

Fig. 1 is a front view of an integrated flue gas cleaning tower provided in an embodiment of the present invention.

Fig. 2 is a top view of an integrated flue gas cleaning tower dust collector unit provided in an embodiment of the present invention.

Fig. 3 is a top view of an integrated flue gas cleaning tower ash discharge device provided in an embodiment of the invention.

Fig. 4 is a schematic view of a steel frame of a desulfurization reaction tower of the integrated flue gas purification tower provided in the embodiment of the present invention.

Fig. 5 is a schematic view of a steel frame of a dust remover unit of the integrated flue gas cleaning tower provided in the embodiment of the present invention.

Fig. 6 is a schematic combination diagram of an integrated flue gas cleaning tower dust remover unit provided in the embodiment of the invention.

Fig. 7 is a schematic installation diagram of a dry powder injector of the integrated flue gas purification tower provided in the embodiment of the invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the disclosure is illustrated in the accompanying drawings

However, it should be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein

And (4) limitation. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure

Will be fully conveyed to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments and

the features of the embodiments may be combined with each other. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

An integrated flue gas cleaning tower embodiment.

Referring to fig. 1 to 7, a preferred structure of an integrated flue gas purification tower provided by the embodiment of the invention is shown. As shown, the integrated flue gas cleaning tower comprises: the device comprises a steel frame 1, a flue gas inlet interface 2, a desulfurization reaction tower 3, a dust remover inlet branch flue 4, a dust remover unit 5, a middle box body 6, a dust remover outlet branch flue 7, a flue gas collecting flue 8, a flue gas outlet interface 9, a screw conveyor 10 and a middle ash bucket 11.

Wherein, steelframe 1 is installed on the civil engineering stand support in the gas cleaning room to be connected fixedly through bolted connection mode and civil engineering basis.

The integrated flue gas purification tower consists of a desulfurization reaction tower 3, a plurality of dust remover units 5 (12 in the embodiment) and intermediate box bodies 6 (12 in the embodiment) which are arranged on the same steel frame 1; the desulfurization reaction tower 3 is welded and fixed with an upper-layer beam 1.1 of the steel frame 1 through four fixing supports; and the dust remover unit 4 is fixedly connected with the lower-layer beam 1.2 of the steel frame 1 in a welding mode.

In one possible implementation, the desulfurization reaction tower 3 includes: the device comprises a reaction tower body 3.1, a flue gas distributor 3.2, a rotary atomizer 3.3, a slaked lime injector 3.4, an activated carbon injector 3.5, a flue gas guide cone 3.6, a fixed support 3.7 and a support ring 3.8; wherein the reaction tower body 3.1 is formed by splicing a top plate t1, a cylindrical barrel t2 and a conical ash bucket t3 in a welding manner.

In one possible implementation mode, the flue gas distributor 3.2 is arranged at the top of the reaction tower body 3.1 and is connected with the reaction tower body 3.1 in a welding mode through a support ring 3.8; wherein, the smoke distributor 3.2 consists of a rotary volute type flue f1 and a louver smoke guider f2 inclined towards the center; the flue gas distributor changes the horizontal flue gas flow before entering the desulfurization reaction tower into the vertically downward uniform flue gas flow, and creates good mixing conditions for the desulfurization reaction between gas and liquid phases.

The rotary atomizer 3.3 is arranged in a central mounting hole of the flue gas distributor 3.2 and is fixedly connected through a pressure plate; the slaked lime slurry is atomized into fine liquid drops by a high-speed rotary disc of a rotary atomizer, and then is subjected to gas-liquid absorption, drying and physical and chemical desulfurization reaction with surrounding high-temperature rotational flow hot flue gas to removeSO in flue gas₂Acid gases such as HCl and HF; wherein, the moisture in the reaction product is dried and evaporated to be a dry powder substance which enters the inlet branch flue 4 of the dust remover along with the flue gas.

In a possible realization mode, the inlet branch flue 4 of the dust remover is of a circular cross section, the upper end of the inlet branch flue is connected with each flue gas opening of the conical ash bucket t3 of the reaction tower body 3.1 in a welding mode, and the lower end of the inlet branch flue is connected with the dust remover unit 5 in a welding mode; and the flue gas transmission between the desulfurization reaction tower 3 and each dust remover unit 5 is realized.

In a possible realization, the slaked lime injector 3.4, the activated carbon injector 3.5 and the flue gas guide cone 3.6 are arranged at the bottom of the conical hopper t3 of the reaction column body 3.1; the slaked lime injector 3.4 and the activated carbon injector 3.5 are both composed of a plurality of spray pipes n1, the installation central angle of each spray pipe is consistent with the corresponding flue opening below, so that slaked lime dry powder and activated carbon in each spray pipe can be uniformly sprayed into the inlet branch flue 4 of the dust remover, and each spray pipe n1 is converged at the central pipe n2 and is communicated with a material conveying pipeline sent from the outside.

In a possible implementation mode, after the proper cross sectional area and flue gas flow velocity are selected in the inlet branch flue 4 of the dust remover, the gas-solid desulfurization reaction time and the physical adsorption time of the activated carbon in the flue can be prolonged, and the activated carbon and the slaked lime powder can be fully mixed in the inlet branch flue 4 of the dust remover, so that favorable conditions are created for improving the desulfurization reaction efficiency and the activated carbon adsorption efficiency.

The flue gas guide cone 3.6 is fixedly connected with the reaction tower body 3.1 in a welding mode; wherein, each spray pipe n1 of the slaked lime injector 3.4 and the activated carbon injector 3.5 is fixedly connected with the guide cone body in a welding mode.

Referring to fig. 6, the dust collector unit 5 includes: a box body cover plate 5.1, a card board box 5.2, a dust removal box body 5.3, a filter bag 5.4, a bag cage 5.5, a dust collecting hopper 5.6, a dust falling pipe 5.7, an expansion joint 5.8, a gate valve 5.9 and an injection pipe group 5.10; the box body cover plate 5.1 is arranged at the upper end of the pattern plate box 5.2 and is used for installing and overhauling the filter bag 5.3 and the bag cage 5.4; the box body cover plate 5.1 and the flower plate box 5.2 are fixedly connected through a bolt pressing plate.

The pattern plate box 5.2, the dust removal box body 5.3 and the dust collection hopper 5.6 are hermetically connected in a welding mode; the pattern board box 5.2 is arranged at the uppermost end, the middle part is a dust removal box body 5.3, and the lower end is an ash collecting hopper 5.6; the lower part of the ash collecting hopper 5.6 is connected with an ash falling pipe 5.7, an expansion joint 5.8 and a gate valve 5.9 in turn in a welding way.

Referring to fig. 6, the cross section of the middle box body 6 is fan-shaped and is formed by welding a top plate a, a bottom plate b, two side plates c and d, and an inner arc plate e and an outer arc plate f; each middle box body 6 is arranged between the two dust remover unit pattern plate boxes 5.2 and is communicated with the other side of the corresponding pattern plate box with the opening through a side plate c with the opening; the bottom plate b is provided with a round opening for connecting the dust remover outlet branch flue 7. Wherein, the height of the middle box body 6 is consistent with that of the flower plate box 5.2.

Referring to fig. 6, the middle box 6 is welded and fixed with the two side pattern plate boxes 5.2 through two side plates c and d. The upper end of the dust remover outlet branch flue 7 is connected with the round opening of the middle box body bottom plate b in a welding mode, and the lower end of the dust remover outlet branch flue is connected with the flue gas collecting flue 8 in a welding mode; the flue gas collecting flue 8 is fixed on the dedusting box body 5.3 through a supporting frame; the hot flue gas after the purification of the integrated flue gas purification tower enters the subsequent purification system through the flue gas outlet interface 9.

The blowing tube group 5.10 is arranged inside the rosette box 5.2 and comprises: a pulse valve P1, a compressed air tank P2 and a blowing pipe P3; the pulse valve P1 is connected with the compressed air tank P2 through a bolt connection mode, and the injection tube P3 is inserted into a sleeve corresponding to the compressed air tank P2 and is welded and fixed with the compressed air tank P2.

Referring to fig. 1 and 3, a screw conveyor 10 and an intermediate ash hopper 11 are arranged below a gate valve 5.9 at the lowermost end of the dust collector unit 5; wherein, the screw conveyer 10 is welded and fixed with the gate valve 5.9 and the middle ash bucket 11 through connecting pipes at the upper end and the lower end.

The intermediate hopper 11 includes: an ash bucket body 11.1, a gate valve 11.2 and an electric scraper conveyor 11.3; the middle ash bucket 11 is arranged on the ground through a steel frame. Wherein, the gate valve 11.2 is connected with the ash bucket body 11.1 in a welding way; the driving mechanism of the electric scraper conveyor 11.3 is arranged at the top of the ash bucket body 11.1, and the scraper is arranged in the interior of the ash bucket body and used for preventing the phenomena of agglomeration and hardening in the ash bucket in the process of discharging the fly ash out.

In the embodiment, hot flue gas at the outlet of the incinerator enters a desulfurization reaction tower 3 through a flue gas inlet interface 2, the hot flue gas and slaked lime slurry fog drops sprayed out by a rotary atomizer 3.3 are subjected to gas-solid absorption, drying and desulfurization reaction in the desulfurization reaction tower 3, reaction products are dried under the action of high-temperature flue gas to form dry powder substances, and the dry powder substances enter each independent dust remover unit 5 along with the flue gas through a dust remover inlet branch flue 4; before entering a branch flue 4 at the inlet of the dust remover, a certain amount of slaked lime powder and activated carbon are sprayed into the flue gas through a slaked lime sprayer 3.4 and an activated carbon sprayer 3.5 to further remove acid gas in the flue gas and heavy metal, dioxin and the like in the flue gas, and dust and reaction products are filtered and collected together in each dust remover unit 5; the collected fly ash and dry reaction products fall into an ash collecting hopper 5.6 and an ash dropping pipe 5.7, and are discharged out of the flue gas purification system through a screw conveyor 10 and an intermediate ash hopper 11; the filtered clean flue gas enters the middle box body 4 through the pattern plate box 5.2, then enters the flue gas collecting flue 8 through the dust remover outlet branch flue 7, and enters the subsequent flue gas purification system through the flue gas outlet interface 9.

In conclusion, the single-tower integrated design of the semidry deacidification reaction tower and the bag-type dust collector can be adopted in the embodiment, the purposes of compact arrangement of equipment and reduction of occupied area of a flue gas treatment room are achieved, and meanwhile, the equipment manufacturing and installation cost can be greatly reduced.

While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An integrated flue gas purification tower for purifying, desulfurizing and dedusting waste incineration flue gas mainly comprises a steel frame, a flue gas inlet interface, a desulfurization reaction tower, a dust remover inlet branch flue, a dust remover unit, an intermediate box body, a dust remover outlet branch flue, a flue gas collecting flue, a flue gas outlet interface, a screw conveyor and an intermediate ash bucket;

the integrated flue gas purification tower is characterized by comprising one desulfurization reaction tower and a plurality of dust remover units which are arranged on the same steel frame; the desulfurization reaction tower is arranged on a beam at the upper layer of the center of the steel frame, and the plurality of dust remover units are arranged on the beam at the lower layer of the steel frame around the desulfurization reaction tower; the desulfurization reaction tower is connected with the plurality of dust remover units through a plurality of independent dust remover inlet branch flues; the plurality of dust remover units are connected with the flue gas collecting flue through a plurality of independent dust remover outlet branch flues; and the ash discharged by the dust remover unit is collected to one intermediate ash hopper through a plurality of screw conveyors.

2. The integrated flue gas purification tower of claim 1, wherein the desulfurization reaction tower has no tower bottom ash discharge pipe, and flue gas and the desulfurization reaction tower reaction product are discharged into the dust remover unit together through the dust remover inlet branch flue.

3. The integrated flue gas purification tower of claim 1, wherein the deduster units and the intermediate tank are arranged at circular (or polygonal) intervals around the desulfurization reaction tower.

4. The integrated flue gas purification tower of claim 1, wherein the bottom of the ash bucket of the desulfurization reaction tower is provided with a guide cone and a pipe-divided slaked lime and activated carbon injector.