CN110508124B - High-concentration industrial flue gas semi-dry purification treatment system and process method thereof - Google Patents
High-concentration industrial flue gas semi-dry purification treatment system and process method thereof Download PDFInfo
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- CN110508124B CN110508124B CN201910931055.7A CN201910931055A CN110508124B CN 110508124 B CN110508124 B CN 110508124B CN 201910931055 A CN201910931055 A CN 201910931055A CN 110508124 B CN110508124 B CN 110508124B
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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
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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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
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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
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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
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a high-concentration industrial flue gas semi-dry purification treatment system and a process method thereof, wherein the system comprises a denitration unit, a dust removal unit and a desulfurization unit; the inlet end of the denitration unit is communicated with the outlet end of the boiler; the outlet end of the denitration unit is communicated with the inlet end of the dedusting unit; the outlet end of the dust removal unit is communicated with the inlet end of the desulfurization unit; the desulfurization unit comprises a desulfurization tower and a mixing cavity; the mixing cavity is communicated with and arranged at the upstream of the desulfurizing tower along the flue gas flow path; desulfurizer powder is contained in the mixing cavity; the desulfurizing tower comprises a reaction cavity; the reaction cavity is vertically arranged, the top of the reaction cavity is provided with an air inlet, and the bottom of the reaction cavity is provided with an air outlet; a first gas mixing component is arranged in the reaction cavity; the first gas mixing assembly comprises a gas gathering ring piece, a dispersion disc and a second flow equalizing cover; the uniformity of the mixed flue gas doped with desulfurizer powder is adjusted before the desulfurization reaction occurs, so that the efficiency of the subsequent reaction is improved.
Description
Technical Field
The invention relates to the field of flue gas treatment, in particular to a high-concentration industrial flue gas semi-dry purification treatment system.
Background
The semidry method is one of the common methods for desulfurization and denitrification of flue gas, and is widely adopted due to its high desulfurization efficiency. But the desulfurizer powder doping uniformity of the traditional semi-dry method equipment is not high, the loss is large, and the recovery of desulfurization reaction products is troublesome, so that the desulfurization and denitrification efficiency of the equipment is reduced. Therefore, a high-concentration industrial flue gas semi-dry purification treatment system with high material utilization rate and convenient product recovery is needed to be invented.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the high-concentration industrial flue gas semidry purification treatment system which is high in material utilization rate and convenient in product recovery.
The technical scheme is as follows: in order to achieve the aim, the high-concentration industrial flue gas semi-dry purification treatment system comprises a denitration unit, a dust removal unit and a desulfurization unit; the inlet end of the denitration unit is communicated with the outlet end of the boiler; the outlet end of the denitration unit is communicated with the inlet end of the dedusting unit; the outlet end of the dust removal unit is communicated with the inlet end of the desulfurization unit;
the desulfurization unit comprises a desulfurization tower and a mixing cavity; the mixing cavity is communicated with and arranged at the upstream of the desulfurizing tower along the flue gas flow path; desulfurizer powder is contained in the mixing cavity; the desulfurizing tower comprises a reaction cavity; the reaction cavity is vertically arranged, the top of the reaction cavity is provided with an air inlet, and the bottom of the reaction cavity is provided with an air outlet; a first gas mixing component is arranged in the reaction cavity; the first gas mixing assembly comprises a gas gathering ring piece, a dispersion disc and a second flow equalizing cover; the gas gathering ring piece is arranged at one end of the reaction cavity close to the gas inlet; the outer edge of the gas gathering ring piece is correspondingly connected with the inner wall of the reaction cavity; a first flow through hole is formed in the center of the air gathering ring piece; the dispersion disc is arranged below the gas gathering ring piece; a drainage dome is arranged at the center of the upper end of the dispersion disc; the drainage dome corresponds to the position of the first flow through hole in the vertical direction; second flow through holes are uniformly arranged at the edge of the dispersion disc in the circumferential direction; the second flow equalizing cover is arranged below the dispersion disc; the concave surface of the second flow equalizing cover faces upwards, and a plurality of third flow holes are formed in the surface of the second flow equalizing cover; a plurality of air injection blocks are circumferentially and symmetrically arranged on the side wall of the reaction cavity; the air injection block is positioned between the dispersion disc and the second flow equalizing cover in the vertical direction; the outlet end of the air injection block faces to the distribution center of the air injection block.
Furthermore, a second gas mixing assembly is arranged in the reaction cavity; the second gas mixing assembly comprises a first flow equalizing cover and a second flow equalizing cover; the concave surface of the first flow equalizing cover is opposite to the concave surface of the second flow equalizing cover; the first flow equalizing cover is positioned above the corresponding second flow equalizing cover; a plurality of pairs of the first flow equalizing covers and the second flow equalizing covers are distributed at intervals along the vertical direction; a desulfurization plate group is arranged between the first flow equalizing cover and the second flow equalizing cover of the same pair; a water mist generator is arranged on the desulfurization plate group; a replacement window is arranged on the side wall of the reaction cavity; the replacement window corresponds to the position of the desulfurization plate group in the horizontal direction.
Further, the desulfurization plate group comprises unit plates and frame pieces; the frame pieces are correspondingly clamped at the periphery of the unit plates; the plurality of unit plates are arranged in parallel at intervals; a plurality of third flow through holes are arranged on the surface of the unit plate in a penetrating manner; the third flow holes on the adjacent unit plates are staggered in the vertical direction; the water mist generator is arranged on one side of the frame piece close to the replacement window; the surface of the unit plate is embedded with an injection pipe; the plurality of injection pipes are communicated with each other, and the gap parts among the third through holes are uniformly distributed in a net shape; the spraying pipe is communicated with the outlet end of the water mist generator; the side of the surface of the injection pipe, which is opposite to the embedded plate surface, is provided with an injection hole; the plurality of injection holes are uniformly distributed at intervals along the length direction of the injection pipe.
Further, the mixing chamber comprises a cartridge body; a feeding hole is formed in the top of the bin body; a discharge hole is formed in the bottom of the bin body; an auxiliary bin is communicated below the discharge hole; a poking wheel is embedded at the discharge port; the rotation range of the thumb wheel is correspondingly matched with the opening of the discharge hole; the auxiliary bin is arranged outside the thumb wheel in a sealing manner; the auxiliary bins on the two sides of the thumb wheel are respectively communicated with an air duct and a conveying pipe; the air outlet of the air duct corresponds to the position of the thumb wheel; the inlet end of the conveying pipe is correspondingly arranged on the air outlet path of the air duct; the outlet end of the conveying pipe is communicated with the air inlet.
Further, the thumb wheel comprises a shaft body and blades; the shaft body is in running fit with the side wall of the discharge hole; the blades are circumferentially and uniformly distributed on the side surface of the shaft body; the material grooves are formed in the surfaces of the two sides of the blade; the length direction of the trough is consistent with the air outlet path of the air duct.
Further, a sealing end cover is arranged at the feed inlet in a matched manner; a limiting ring groove is horizontally arranged on the inner wall of the bin body; a strip-shaped window is arranged on the side wall of the bin body in a penetrating way; a baffle is embedded in the strip-shaped window in a matching way; the baffle plate passes through the strip-shaped window to move in a reciprocating manner, and the moving path corresponds to the cross section of the bin body; the baffle is correspondingly matched with the limiting ring groove to separate the inner spaces of the upper bin body and the lower bin body.
Furthermore, a heat exchange pipeline is arranged in the wall surface of the conveying pipe; the inlet end of the heat exchange pipeline is communicated with a water source; the outlet end of the heat exchange pipeline is communicated with the inlet end of the water mist generator; and a heat conduction cushion layer is attached to the inner wall surface of the conveying pipe.
Further, the process method of the high-concentration industrial flue gas semi-dry purification treatment system comprises the following steps,
firstly, flue gas generated by boiler combustion is subjected to denitration and dust removal, and then enters a desulfurization unit; driving the dial wheel to rotate, and transferring the desulfurizer powder in the bin body into the auxiliary bin space; flue gas flows into the auxiliary bin through the air duct, and desulfurizer powder is entrained into the reaction cavity;
after the mixed flue gas containing the desulfurizer powder enters the reaction cavity, the mixed flue gas is firstly concentrated to the central position of the reaction cavity under the action of the gas gathering ring piece, and the distribution uniformity of the desulfurizer powder in the flue gas is improved in the concentration process;
thirdly, the mixed flue gas passing through the first flow through hole of the gas gathering ring part continuously flows, collides with a flow guide dome at the central position of the upper surface of the dispersion disc, then diffuses towards the periphery of the dispersion disc and passes through the second flow through hole, and then is pushed by the airflow of the air injection block to gather together again; in the gathering process, the desulfurizer powder and the flue gas are mixed for the second time, so that the uniformity is further improved;
step four, the mixed flue gas continuously flows and is transferred from the first gas mixing component to the second gas mixing component; the mixed flue gas sequentially passes through the combination of a plurality of groups of first flow equalizing covers and second flow equalizing covers to realize a periodical and repeated remixing process; meanwhile, a third flow through hole on the unit plate is penetrated between each group of the first flow equalizing cover and the second flow equalizing cover, and the third flow through holes are contacted with water mist sprayed on the spraying pipe to generate a desulfurization reaction, a product generated by the reaction falls onto the surface of the unit plate, and the residual mixed flue gas continuously circulates and is sequentially desulfurized in different unit plate action areas;
and fifthly, the flue gas after desulfurization leaves the desulfurization unit from the gas outlet and is discharged to a space outside the purification treatment system through a chimney which is communicated in a matching way.
Has the advantages that: the invention discloses a high-concentration industrial flue gas semi-dry purification treatment system, which comprises a denitration unit, a dust removal unit and a desulfurization unit; the inlet end of the denitration unit is communicated with the outlet end of the boiler; the outlet end of the denitration unit is communicated with the inlet end of the dedusting unit; the outlet end of the dust removal unit is communicated with the inlet end of the desulfurization unit; the desulfurization unit comprises a desulfurization tower and a mixing cavity; the mixing cavity is communicated with and arranged at the upstream of the desulfurizing tower along the flue gas flow path; desulfurizer powder is contained in the mixing cavity; the desulfurizing tower comprises a reaction cavity; the reaction cavity is vertically arranged, the top of the reaction cavity is provided with an air inlet, and the bottom of the reaction cavity is provided with an air outlet; a first gas mixing component is arranged in the reaction cavity; the first gas mixing assembly comprises a gas gathering ring piece, a dispersion disc and a second flow equalizing cover; the uniformity of the mixed flue gas doped with desulfurizer powder is adjusted before the desulfurization reaction occurs, so that the efficiency of the subsequent reaction is improved.
Drawings
FIG. 1 is a schematic view of the overall process of flue gas treatment;
FIG. 2 is a schematic view of the internal structure of a desulfurizing tower;
FIG. 3 is a schematic view of the flow path of gas inside a desulfurizing tower;
FIG. 4 is a schematic structural view of a desulfurization plate group;
FIG. 5 is a schematic structural view of a mixing chamber;
figure 6 is a schematic diagram of the working principle of the mixing chamber.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The high-concentration industrial flue gas semi-dry purification treatment system comprises a denitration unit 2, a dust removal unit 5 and a desulfurization unit 7 as shown in the attached figure 1; the inlet end of the denitration unit 2 is communicated with the outlet end of the boiler; the outlet end of the denitration unit 2 is communicated with the inlet end of the dedusting unit 5; the outlet end of the dust removal unit 5 is communicated with the inlet end of the desulfurization unit 7; flue gas generated by the boiler 1 is firstly mixed with ammonia gas conveyed in the liquid ammonia evaporation unit 8, then enters the denitration unit 2 for denitration reaction, then continuously flows to the heat exchanger 3 for cooling, and enters the desulfurization unit 7 for desulfurization reaction after solid particles are filtered out by the dust removal unit 5; the flue gas after the desulfurization reaction is discharged through a chimney, and the product generated in the desulfurization reaction enters a product treatment unit 6 for reutilization; wherein, the denitration unit 2 can purchase the scheme of SCR denitration equipment on the market; the typical desulfurizing agent in the desulfurizing unit 7 is CaO, and the product CaSO thereof4In the product processing unit 6, the product is used for being doped in concrete blocks and used as building materials.
The desulfurization unit 7 comprises a desulfurization tower 71 and a mixing cavity 72; the mixing cavity 72 is arranged at the upstream of the desulfurizing tower 71 along the flue gas flow path in a communicating way; desulfurizer powder 701 is contained in the mixing cavity 72; as shown in fig. 2, the desulfurization tower 71 includes a reaction chamber 711; the reaction chamber 711 is vertically arranged, the top of the reaction chamber is provided with an air inlet 712, and the bottom of the reaction chamber is provided with an air outlet 713; the reaction cavity 711 is internally provided with a first gas mixing component 73, and has the function of adjusting the uniformity of mixed flue gas doped with desulfurizer powder 701 before desulfurization reaction occurs, so that the efficiency of subsequent reaction is improved;
the first gas mixing assembly 73 comprises a gas gathering ring piece 731, a dispersion plate 732 and a second flow equalizing cover 733; the trap piece 731 is disposed at one end of the reaction chamber 711 near the gas inlet 712; the outer edge of the gas gathering ring piece 731 is correspondingly connected with the inner wall of the reaction cavity 711; a first flow through hole 734 is arranged at the center of the air trap ring piece 731; the ring-shaped structure can gather the mixed flue gas entering the reaction cavity 711 for one time; the dispersion plate 732 is disposed below the trap member 731; a flow guide dome 735 is arranged at the center of the upper end of the dispersion plate 732 and is used for breaking gathered mixed flue gas to disperse the mixed flue gas to the edge of the dispersion plate 732, so that a gathering-dispersing mixing process is completed through airflow stirring;
the flow directing dome 735 corresponds in vertical direction to the first flow aperture 734 location; second flow through holes 736 are uniformly arranged at the edge of the dispersion plate 732 in the circumferential direction; the second flow equalizing hood 733 is disposed below the dispersion plate 732; the concave surface of the second flow equalizing cover 733 faces upwards, and a plurality of third flow holes 737 are formed in the surface of the second flow equalizing cover; a plurality of air injection blocks 715 are symmetrically arranged on the side wall of the reaction cavity 711 in the circumferential direction; the gas injection block 715 is located between the dispersion plate 732 and the second flow equalizing cover 733 in the vertical direction; the outlet end of the air injection block 715 faces to the distribution center of the air injection block; air is introduced through the air injection block 715, and the mixed flue gas is diluted for the first time, so that the content of desulfurizer powder in the mixed flue gas is reduced, and waste caused by untimely reaction due to overhigh powder content can be avoided; meanwhile, the gas injection block 715 can push and concentrate the mixed flue gas flowing down from the second flow through hole 736 above by aligning with the air flow at the central position, thereby realizing the uniform convection stirring process during dynamic dilution and concentration again;
the reaction cavity 711 is also internally provided with a second gas mixing assembly 74 which is used for performing multi-stage desulfurization on the mixed flue gas; the second air mixing component 74 comprises a first flow equalizing cover 741 and a second flow equalizing cover 733; the concave surface of the first flow equalizing cover 741 is opposite to the concave surface of the second flow equalizing cover 733; the first flow equalizing cover 741 is located above the corresponding second flow equalizing cover 733; a plurality of pairs of the first flow equalizing cover 741 and the second flow equalizing cover 733 are distributed at intervals in the vertical direction; the desulfurization plate group 75 is arranged between the first flow equalizing cover 741 and the second flow equalizing cover 733 of the same pair, so that the desulfurization reaction can be immediately carried out after the mixed flue gas uniformly passes through the first flow equalizing cover 741, and the homogenization can be realized again through the second flow equalizing cover 733 after the primary desulfurization reaction, so as to prepare for the next reaction; the desulfurization plate group 75 is provided with a water mist generator 76, taking a desulfurizer as CaO for example, for mixing SO in the flue gas2Can generate H when meeting water2SO3CaO and H2SO3Reaction to produce CaSO3CaO generates CaOH and CaSO when contacting water3Reacting with CaOH to generate CaSO3And further oxidized to CaSO4(ii) a A replacement window 702 is arranged on the side wall of the reaction cavity 711; the replacement window 702 corresponds to the position of the desulfurization plate group 75 in the horizontal direction; the reaction product falls on the surface of the desulfurization plate group 75, and the desulfurization plate group 75 is replaced by the replacement window 702 in the flue gas conveying gap, so that the product collection can be conveniently and quickly carried out;
as shown in fig. 4, the desulfurization plate assembly 75 includes a unit plate 751 and a frame 752; the frame 752 is correspondingly clamped on the periphery of the unit plate 751; a plurality of unit plates 751 are arranged in parallel at intervals; a plurality of third through holes 753 are formed in the surface of the unit plate 751 in a penetrating manner; the third through holes 753 of the adjacent unit plates 751 are staggered in the vertical direction, so that desulfurization reaction products can be intercepted by the current plate surface each time the desulfurization reaction products fall, the residence time of mixed flue gas is prolonged, and the reaction efficiency is improved; the water mist generator 76 is arranged on one side of the frame element 752 close to the replacement window 702 and is synchronously arranged and replaced along with the corresponding desulfurization plate group 75, so that the step of frequently disassembling is omitted, and only the related pipelines need to be reconnected; the surface of the unit plate 751 is embedded with an injection pipe; the plurality of injection pipes are communicated with each other, and gap parts among the third through holes 753 are uniformly distributed in a net shape, so that a reaction area on the unit plate 751 can be effectively covered; the injection pipe is communicated with the outlet end of the water mist generator 76; the side of the surface of the injection pipe, which is opposite to the embedded plate surface, is provided with an injection hole; the plurality of injection holes are uniformly distributed at intervals along the length direction of the injection pipe.
As shown in fig. 5, the mixing chamber 72 includes a cartridge body 721; a feeding hole 722 is formed in the top of the bin body 721; a discharge hole 723 is formed in the bottom of the bin body 721; an auxiliary bin is communicated below the discharge hole 723 and used for providing a closed space for mixing desulfurizer powder and flue gas; a thumb wheel 77 is embedded at the discharge hole 723; the rotation range of the thumb wheel 77 is correspondingly matched with the opening of the discharge hole 723, and desulfurizer powder in the bin body 721 is pushed out through self rotation, so that the adjustment of the discharge speed can be realized through the adjustment of the rotation speed, and the discharge speed is uniform and controllable; the auxiliary bin is arranged outside the thumb wheel 77 in a sealing manner; the auxiliary bins on the two sides of the thumb wheel 77 are respectively communicated with an air duct 724 and a conveying pipe 725; an air outlet of the air duct 724 corresponds to the position of the thumb wheel 77, and powder conveyed by the thumb wheel 77 is blown away in time by using smoke to complete mixing of the powder and the thumb wheel; the inlet end of the conveying pipe 725 is correspondingly arranged on the air outlet path of the air duct 724; the outlet end of the delivery pipe 725 communicates with the gas inlet 712.
The thumb wheel 77 comprises a shaft body 771 and blades 772; the shaft body 771 is in running fit with the side wall of the discharge hole 723; the blades 772 are annularly and uniformly distributed on the side surface of the shaft body 771; troughs 773 are arranged on the surfaces of the two sides of the blade 772, so that the powder can be distributed on the surface of the blade 772 more uniformly; the length direction of the trough 773 is consistent with the air outlet path of the air duct 724;
a sealing end cover 726 is arranged at the feed inlet 722 in a matching manner; a limit ring groove 727 is horizontally arranged on the inner wall of the bin body 721; a strip-shaped window 728 is arranged on the side wall of the bin body 721 in a penetrating way; a baffle 729 is embedded in the strip window 728 in a matching manner; the baffle 729 passes through the strip-shaped window 728 to move in a reciprocating manner, and the moving path corresponds to the cross section of the bin body 721; the baffle 729 is correspondingly matched with the limit ring groove 727 to separate the space in the upper and lower bin bodies 721; as shown in fig. 6, part (a) of the figure shows the initial state of the bin body 721, at this time, the thumb wheel 77 works normally, the bin body 721 contains desulfurizer powder, and meanwhile, the vacant space below the baffle 729 is larger than that above the baffle 729; then, as shown in part (b), the sealing end cap 726 is opened, and a new batch of desulfurizer powder is added into the bin body 721; then, as shown in part (c), the sealing cap 726 is closed, and then the baffle 729 is pulled out, so that the new desulfurized powder falls down and is combined with the original powder; finally, as shown in part (d), the baffle 729 is inserted back to its original position, and after the powder inventory thereunder is as shown in part (a), a new cycle is performed again; the baffle 729 has the effect that if powder is directly poured into the bin body 721, a large height difference can generate more suspended particles, which causes material waste and increases cleaning workload; and through the buffering of baffle 729, empty the difference in height and show and reduce, merge the powder of baffle 729 upper and lower part afterwards under the condition that storehouse body 721 seals, stopped the problem that the suspended particles leaked.
A heat exchange pipeline is arranged in the wall surface of the conveying pipe 725; the inlet end of the heat exchange pipeline is communicated with a water source; the outlet end of the heat exchange pipeline is communicated with the inlet end of the water mist generator 76, so that the temperature of the water mist participating in the desulfurization reaction can be increased, and the temperature of the water mist can be close to that of the mixed flue gas under the heating action in the ultrasonic vibration and fogging process, so that the environmental temperature of the whole desulfurization reaction is more stable; the surface of the inner wall of the conveying pipe 725 is provided with a heat conducting cushion layer in a fitting manner, and the heating effect can be regulated and controlled to a certain extent through the thickness of the heat conducting cushion layer, so that the process requirement can be better met.
The technological process of semi-dry high concentration industrial fume purifying treatment system includes the following steps,
firstly, flue gas generated by combustion of a boiler 1 is subjected to denitration and dust removal, and then enters a desulfurization unit 7; the thumb wheel 77 is driven to rotate, and the desulfurizer powder 701 in the bin body 721 is transferred into the auxiliary bin space; flue gas flows into the auxiliary bin through the air duct 724, and desulfurizer powder 701 is entrained to enter the reaction cavity 711;
step two, as shown in the attached figure 3, the arrow in the figure indicates the flowing direction of the mixed flue gas; after entering the reaction chamber 711, the mixed flue gas containing the desulfurizer powder 701 is firstly concentrated to the central position of the reaction chamber 711 under the action of the gas gathering ring piece 731, and the distribution uniformity of the desulfurizer powder 701 in the flue gas is improved in the concentration process;
step three, the mixed flue gas passing through the first flow through hole 734 of the trap piece 731 continues flowing, hits the flow guide dome 735 at the central position of the upper surface of the dispersion plate 732, then diffuses towards the periphery of the dispersion plate 732 and passes through the second flow through hole 736, and then is pushed by the airflow of the air injection block 715 to be gathered again; in the gathering process, the desulfurizing agent powder 701 and the flue gas are mixed for the second time, so that the uniformity is further improved;
step four, the mixed flue gas continues flowing and is transferred from the first gas mixing assembly 73 to the second gas mixing assembly 74; the mixed flue gas sequentially passes through the combination of a plurality of groups of first flow equalizing hoods 741 and second flow equalizing hoods 733 to realize a periodic multiple remixing process; meanwhile, a third flow through hole 753 on the unit plate 751 penetrates through the position between each group of the first flow equalizing hoods 741 and the second flow equalizing hoods 733, the third flow through holes contact with water mist sprayed out of the spraying pipes, a desulfurization reaction occurs, products generated by the reaction fall onto the surface of the unit plate 751, and the residual mixed flue gas continues to flow and is sequentially desulfurized in different unit plate 751 action areas;
and step five, the flue gas after desulfurization leaves the desulfurization unit 7 from the gas outlet 713, and is discharged to a space outside the purification treatment system through a chimney which is communicated in a matching way.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (8)
1. High concentration industry flue gas semidry process purification treatment system, its characterized in that: comprises a denitration unit (2), a dust removal unit (5) and a desulfurization unit (7); the inlet end of the denitration unit (2) is communicated with the outlet end of the boiler; the outlet end of the denitration unit (2) is communicated with the inlet end of the dedusting unit (5); the outlet end of the dust removal unit (5) is communicated with the inlet end of the desulfurization unit (7);
the desulfurization unit (7) comprises a desulfurization tower (71) and a mixing cavity (72); the mixing cavity (72) is communicated with and arranged at the upstream of the desulfurizing tower (71) along the flue gas flow path; desulfurizer powder (701) is contained in the mixing cavity (72); the desulfurization tower (71) comprises a reaction chamber (711); the reaction cavity (711) is vertically arranged, the top of the reaction cavity is provided with an air inlet (712), and the bottom of the reaction cavity is provided with an air outlet (713); a first gas mixing component (73) is arranged in the reaction cavity (711); the first gas mixing assembly (73) comprises a gas gathering ring piece (731), a dispersion disc (732) and a second flow equalizing cover (733); the gas gathering ring piece (731) is arranged at one end, close to the gas inlet (712), in the reaction cavity (711); the outer edge of the gas gathering ring piece (731) is correspondingly connected with the inner wall of the reaction cavity (711); a first flow through hole (734) is arranged at the center of the air gathering ring piece (731); the dispersion plate (732) is arranged below the air gathering ring piece (731); a drainage dome (735) is arranged at the center of the upper end of the dispersion disc (732); the flow directing dome (735) corresponds in vertical direction to a first flow through aperture (734) location; second flow through holes (736) are uniformly arranged at the edge of the dispersion disc (732) in the circumferential direction; the second flow equalizing cover (733) is arranged below the dispersion disc (732); the concave surface of the second flow equalizing cover (733) faces upwards, and a plurality of third flow holes (737) are formed in the surface of the second flow equalizing cover; a plurality of air injection blocks (715) are symmetrically arranged on the side wall of the reaction cavity (711) in the circumferential direction; the air injection block (715) is positioned between the dispersion disc (732) and the second flow equalizing cover (733) in the vertical direction; the outlet ends of the air injection blocks (715) face to the distribution center position of the air injection blocks.
2. The high-concentration industrial flue gas semidry purification treatment system according to claim 1, wherein: a second gas mixing assembly (74) is also arranged in the reaction cavity (711); the second air mixing component (74) comprises a first flow equalizing cover (741) and a second flow equalizing cover (733); the concave surface of the first flow equalizing cover (741) is opposite to the concave surface of the second flow equalizing cover (733); the first flow equalizing cover (741) is positioned above the corresponding second flow equalizing cover (733); a plurality of pairs of the first flow equalizing cover (741) and the second flow equalizing cover (733) are distributed at intervals in the vertical direction; a desulfurization plate group (75) is arranged between the first flow equalizing cover (741) and the second flow equalizing cover (733) of the same pair; a water mist generator (76) is arranged on the desulfurization plate group (75); a replacement window (702) is arranged on the side wall of the reaction cavity (711); the replacement window (702) corresponds to the position of the desulfurization plate group (75) in the horizontal direction.
3. The high-concentration industrial flue gas semidry purification treatment system according to claim 2, wherein: the desulfurization plate group (75) comprises unit plates (751) and frame pieces (752); the frame piece (752) is correspondingly clamped at the periphery of the unit plate (751); a plurality of unit plates (751) are arranged in parallel at intervals; a plurality of third flow through holes (753) are formed in the surface of the unit plate (751) in a penetrating mode; third flow through holes (753) in adjacent unit plates (751) are staggered in position in the vertical direction; the water mist generator (76) is arranged on one side of the frame piece (752) close to the replacement window (702); the surface of the unit plate (751) is embedded with an injection pipe; the plurality of injection pipes are communicated with each other, and gap parts among the third flow through holes (753) are uniformly distributed in a net shape; the injection pipe is communicated with the outlet end of the water mist generator (76); the side of the surface of the injection pipe, which is opposite to the embedded plate surface, is provided with an injection hole; the plurality of injection holes are uniformly distributed at intervals along the length direction of the injection pipe.
4. The high-concentration industrial flue gas semidry purification treatment system according to claim 3, wherein: the mixing chamber (72) comprises a cartridge body (721); the top of the bin body (721) is provided with a feeding hole (722); a discharge hole (723) is formed in the bottom of the bin body (721); an auxiliary bin is communicated and arranged below the discharge hole (723); a thumb wheel (77) is embedded at the discharge hole (723); the rotation range of the thumb wheel (77) is correspondingly matched with the opening of the discharge hole (723); the auxiliary bin is arranged outside the thumb wheel (77) in a sealing manner; the auxiliary bins on the two sides of the thumb wheel (77) are respectively communicated with an air duct (724) and a conveying pipe (725); the air outlet of the air duct (724) corresponds to the position of the thumb wheel (77); the inlet end of the conveying pipe (725) is correspondingly arranged on the air outlet path of the air duct (724); the outlet end of the delivery pipe (725) communicates with the gas inlet (712).
5. The high-concentration industrial flue gas semidry purification treatment system according to claim 4, wherein: the thumb wheel (77) comprises a shaft body (771) and blades (772); the shaft body (771) is in running fit with the side wall of the discharge hole (723); the blades (772) are circumferentially and uniformly distributed on the side surface of the shaft body (771); troughs (773) are arranged on the surfaces of the two sides of the blade (772); the length direction of the trough (773) is consistent with the air outlet path of the air duct (724).
6. The high-concentration industrial flue gas semidry purification treatment system according to claim 5, wherein: a sealing end cover (726) is arranged at the feed port (722) in a matching way; a limit ring groove (727) is horizontally arranged on the inner wall of the bin body (721); a strip-shaped window (728) is arranged on the side wall of the bin body (721) in a penetrating way; a baffle (729) is embedded in the strip window (728) in a matching way; the baffle (729) passes through the strip-shaped window (728) to move in a reciprocating way, and the moving path corresponds to the cross section of the bin body (721); the baffle (729) is correspondingly matched with the limit ring groove (727) to separate the inner spaces of the upper and lower bin bodies (721).
7. The high-concentration industrial flue gas semidry purification treatment system according to claim 5, wherein: a heat exchange pipeline is arranged in the wall surface of the conveying pipe (725); the inlet end of the heat exchange pipeline is communicated with a water source; the outlet end of the heat exchange pipeline is communicated with the inlet end of a water mist generator (76); and a heat conduction cushion layer is attached to the surface of the inner wall of the conveying pipe (725).
8. The process method of the high-concentration industrial flue gas semi-dry purification treatment system according to any one of claims 5 to 7, wherein the process method comprises the following steps: comprises the following steps of (a) carrying out,
firstly, flue gas generated by combustion of a boiler (1) is subjected to denitration and dust removal, and then enters a desulfurization unit (7); the dial wheel (77) is driven to rotate, and the desulfurizer powder (701) in the bin body (721) is transferred into the auxiliary bin space; flue gas flows into the auxiliary bin through the air duct (724), and desulfurizer powder (701) is entrained to enter the reaction cavity (711);
after entering the reaction cavity (711), the mixed flue gas containing the desulfurizer powder (701) is firstly concentrated to the central position of the reaction cavity (711) under the action of the gas gathering ring piece (731), and the distribution uniformity of the desulfurizer powder (701) in the flue gas is improved in the concentration process;
thirdly, the mixed flue gas passing through the first flow through hole (734) of the gas gathering ring piece (731) continuously flows, collides with a flow guide dome (735) at the central position of the upper surface of the dispersion plate (732), then diffuses towards the periphery of the dispersion plate (732), passes through the second flow hole (736), and is pushed by the airflow of the gas injection block (715) to be gathered again; in the gathering process, the desulfurizing agent powder (701) and the flue gas are mixed for the second time, and the uniformity is further improved;
step four, the mixed flue gas continuously flows and is transferred from the first gas mixing component (73) to the second gas mixing component (74); the mixed flue gas sequentially passes through the combination of a plurality of groups of first flow equalizing hoods (741) and second flow equalizing hoods (733) to realize a periodical and multiple remixing process; meanwhile, a third flow through hole (753) on the unit plate (751) is penetrated between each group of the first flow equalizing cover (741) and the second flow equalizing cover (733) and is contacted with water mist sprayed out of the spraying pipe to generate a desulfurization reaction, a product generated by the reaction falls onto the surface of the unit plate (751), and the residual mixed flue gas continuously flows and is sequentially desulfurized in the action areas of different unit plates (751);
and step five, the flue gas after desulfurization leaves the desulfurization unit (7) from the gas outlet (713), and is discharged to a space outside the purification treatment system through a chimney which is matched and communicated.
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| CN100473450C (en) * | 2005-04-28 | 2009-04-01 | 株式会社日立高新技术 | Fluid mixing apparatus |
| IL176899A0 (en) * | 2006-07-17 | 2006-12-10 | E E R Env Energy Resrc Israel | Apparatus and method for the removal of gaseous pollutants from an upwardly flowing gas stream |
| US8141353B2 (en) * | 2008-04-25 | 2012-03-27 | Tenneco Automotive Operating Company Inc. | Exhaust gas additive/treatment system and mixer for use therein |
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| KR101351637B1 (en) * | 2012-03-23 | 2014-01-16 | (주)에이엠티퍼시픽 | Liquid Splitter |
| CN204710098U (en) * | 2015-05-14 | 2015-10-21 | 广东华信达节能环保有限公司 | A kind of stable desulfurizing tower energy-conservation again |
| CN204865520U (en) * | 2015-07-13 | 2015-12-16 | 大唐环境产业集团股份有限公司 | Effect device is carried in desulfurization |
| CN106861481B (en) * | 2017-03-20 | 2022-11-25 | 浙江为环科技有限公司 | Pipeline mixer |
| CN207708812U (en) * | 2017-12-06 | 2018-08-10 | 中电环保股份有限公司 | A kind of coke oven flue gas denitration, desulfurization integrated processing unit |
| CN108211762A (en) * | 2018-03-06 | 2018-06-29 | 山东三融环保工程有限公司 | A kind of turbulent flow intensifying device |
| CN208320444U (en) * | 2018-04-11 | 2019-01-04 | 无锡沃得旋转雾化科技有限公司 | A kind of flue gas of sintering machine equipment |
| CN108421397A (en) * | 2018-05-21 | 2018-08-21 | 浙江洲扬环保科技有限公司 | Dedusting, desulphurization and denitration integrated fume purifier |
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