CN116651188A - Waste gas sintering method slag desulfurization device - Google Patents

Waste gas sintering method slag desulfurization device Download PDF

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Publication number
CN116651188A
CN116651188A CN202310517325.6A CN202310517325A CN116651188A CN 116651188 A CN116651188 A CN 116651188A CN 202310517325 A CN202310517325 A CN 202310517325A CN 116651188 A CN116651188 A CN 116651188A
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CN
China
Prior art keywords
flue gas
slag
gas pipeline
desulfurization
movable inner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202310517325.6A
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Chinese (zh)
Inventor
吴薇娜
李晓明
李宇轩
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Nantong Lingmu Environmental Protection Equipment Co ltd
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Nantong Lingmu Environmental Protection Equipment Co ltd
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Publication date
Application filed by Nantong Lingmu Environmental Protection Equipment Co ltd filed Critical Nantong Lingmu Environmental Protection Equipment Co ltd
Priority to CN202310517325.6A priority Critical patent/CN116651188A/en
Publication of CN116651188A publication Critical patent/CN116651188A/en
Withdrawn legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/4227—Manipulating filters or filter elements, e.g. handles or extracting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Abstract

The application discloses a waste gas sintering method steel slag desulfurization device, which comprises a slag crushing device and a desulfurization dust removal device, wherein the desulfurization dust removal device comprises a cavity shell with a flue gas pipeline and a mixing stirring device arranged in the flue gas pipeline, a porous passive nozzle connected and communicated with a discharge hole of the mixing stirring device is arranged on the pipe wall of the flue gas pipeline in a penetrating way, the process comprises the steps that the slag crushing device crushes steel slag into slag powder and conveys the slag powder into the slag crushing device to prepare slag powder slurry, and the flue gas pipeline dispersedly sucks the slag powder slurry through sulfur-containing flue gas flowing at high speed by the porous passive nozzle. The high-speed flowing smoke in the smoke pipeline is utilized to attract the slag powder slurry to enter the smoke pipeline, so that the aim of saving energy is achieved, and the smoke carrying the slag powder slurry in the smoke pipeline is further diffused in the cavity shell to be beneficial to mixing of the smoke and the slag powder slurry, so that the effect of desulfurizing the smoke is improved.

Description

Waste gas sintering method slag desulfurization device
Technical Field
The application relates to the technical field of steel slag recovery, in particular to a waste gas sintering method steel slag desulfurization device.
Background
Steel slag is a by-product in the process of steelmaking, and consists of various oxides formed by oxidizing impurities such as silicon, manganese, phosphorus, sulfur and the like in pig iron in the smelting process and salts generated by the reaction of the oxides and solvents. Steel slag contains a number of useful components: 2-8% of metallic iron, 40-60% of calcium oxide, 3-10% of magnesium oxide and 1-8% of manganese oxide, so that the alloy can be used as a ferrous metallurgy raw material. The mineral composition of the steel slag is mainly tricalcium silicate, and then dicalcium silicate, RO phase, dicalcium ferrite and free calcium oxide.
The steel slag is used as secondary resource for comprehensive utilization, and the smelting solvent is mainly recycled in the factory, so that the steel slag can replace limestone and can recover a large amount of metal iron and other useful elements.
At present, steel slag is also used for desulfurization of sintering flue gas, and the method comprises the steps of mixing the crushed steel slag with water to form slurry, spraying the slurry into a cavity shell, and enabling sulfur dioxide in sulfur-containing flue gas to react with various components in the steel slag after being dissolved in the water, so that the purpose of desulfurization of the flue gas is achieved.
However, in the existing steel slag method sintering flue gas desulfurization, slurry is directly sprayed into a cavity shell, and the resistance in the cavity shell is large, so that not only is the energy consumption increased, but also the slurry cannot be fully contacted and reacted with sulfur-containing flue gas in the cavity shell, and the desulfurization effect is not ideal.
Disclosure of Invention
The application aims to provide a steel slag desulfurization device by an exhaust gas sintering method, which aims to solve the technical problem of unsatisfactory desulfurization effect caused by directly spraying slurry mixed by steel slag and water into a cavity shell in the prior art.
In order to solve the technical problems, the application specifically provides the following technical scheme:
the waste gas sintering method steel slag desulfurization device comprises a slag crushing device and a desulfurization dust removal device, wherein the slag crushing device is used for crushing steel slag input into the slag crushing device into fine-particle slag powder, and the slag crushing device is used for conveying the prepared slag powder into the desulfurization dust removal device;
the desulfurization dust removal device comprises a cavity shell with a flue gas pipeline and a mixing and stirring device arranged in the flue gas pipeline, wherein the mixing and stirring device is connected with a discharge port of the slag crushing device, the tail end of the flue gas pipeline is communicated with the interior of the cavity shell, and a porous passive nozzle which is connected and communicated with the discharge port of the mixing and stirring device is arranged on the pipe wall of the flue gas pipeline in a penetrating manner;
the mixing stirring device mixes the slag powder conveyed by the slag crushing device with water to prepare slag powder slurry, the flue gas pipeline disperses and atomizes the slag powder slurry in the mixing stirring device through sulfur-containing flue gas flowing at high speed by the porous passive nozzle and then sucks the slag powder slurry, and the dispersed and atomized slag powder slurry is primarily mixed and reacted with sulfur-containing flue gas in the flue gas pipeline to generate desulfurization flue gas containing various solid particles, and then the desulfurization flue gas and the desulfurization flue gas enter the cavity shell for diffusion and further mixing and reaction.
As a preferable scheme of the application, the desulfurization dust-removing device further comprises a plurality of spiral flow sheets for promoting the sulfur-containing flue gas in the flue gas pipeline to be fully mixed with the slag powder slurry, the plurality of spiral flow sheets are circumferentially and equally arranged on the inner wall of the flue gas pipeline at equal intervals, and the porous passive nozzles are provided with a plurality of spiral flow sheets and are all positioned between the adjacent spiral flow sheets;
the slag powder slurry produced by the mixing and stirring device is sucked into the flue gas pipeline by the porous passive nozzle through the sulfur-containing flue gas passing through the spiral flow sheets, and the flue gas in the flue gas pipeline rotates when passing through the spiral flow sheets, so that the sulfur-containing flue gas in the flue gas pipeline is mixed and reacted with the slag powder slurry, and then flows into the dust removal shell for diffusion and further mixing and reaction.
As a preferable mode of the application, the spiral flow sheet is spirally arranged along the inner wall of the flue gas pipeline, and the thickness of the spiral flow sheet gradually decreases in a direction away from the pipe wall of the flue gas pipeline.
As a preferable scheme of the application, a spray adjusting mechanism is arranged in the flue gas pipeline and is used for adjusting the opening of the porous passive nozzle in a proportional way according to the flow velocity of the sulfur-containing flue gas in the flue gas pipeline so as to enable the sulfur-containing flue gas in the flue gas pipeline to have a proper proportion with the slag powder slurry;
the spray adjusting mechanism comprises a movable inner pipe, a guide assembly and an opening resetting assembly, a plurality of spiral flow sheets are all arranged on the inner wall of the movable inner pipe, the movable inner pipe is coaxially and slidably arranged in the flue gas pipeline, the guide assembly is used for guiding the axial sliding of the movable inner pipe and circumferentially limiting the movable inner pipe, and a spray adjusting square opening used for being matched with the porous passive nozzle is formed in the pipe wall of the movable inner pipe in a penetrating manner;
the sulfur-containing flue gas in the flue gas pipeline pushes the movable inner pipe to move when passing through the plurality of spiral flow sheets in the movable inner pipe, so that the spray adjusting square opening on the movable inner pipe gradually coincides with the porous passive nozzle, and simultaneously, the opening resetting assembly stores energy, and when the kinetic energy of the sulfur-containing flue gas in the movable inner pipe is reduced, the opening resetting assembly drives the movable inner pipe to reset through energy storage so as to reduce the opening of the porous passive nozzle.
As a preferable scheme of the application, the guide assembly comprises a plurality of guide convex strips, the guide convex strips are arranged at intervals around the axis of the movable inner tube and are parallel to the axis of the movable inner tube, a plurality of guide grooves are formed in the outer wall of the movable inner tube, the guide convex strips are in one-to-one sliding insertion fit with the guide grooves, limit gaps for installing the opening resetting assembly are formed in the guide convex strips towards the inner side of the movable inner tube, guide rods inserted into the limit gaps are arranged on the groove walls of the guide grooves, the movable inner tube and the opening resetting assembly are in transmission connection through the guide rods, and the strokes of the movable inner tube in the directions of two ends are matched with the limit gaps through the guide rods.
As a preferable scheme of the application, the opening resetting assembly comprises a spring, a resetting rod and a limiting slide block, wherein a through hole communicated with the limiting notch is formed in the guide convex strip, the end part of the through hole is contracted towards the axis direction to form a limiting hole, the spring is arranged in the through hole, the limiting slide block is fixedly arranged on the resetting rod, the spring pushes the resetting rod through the limiting slide block, the resetting rod is in sliding fit with the limiting hole, and the resetting rod penetrates through the limiting hole and is connected with the guide rod.
As one preferable scheme of the application, a plurality of limit notches are arranged, a plurality of guide rods which are in one-to-one correspondence with the limit notches are arranged in the guide groove, the same reset rod penetrates through the limit holes, the through holes, the limit sliding blocks and the springs, the reset rod is provided with a U-shaped part positioned in the limit notch, an opening of the U-shaped part faces the direction of the guide groove for the insertion of the corresponding guide rods, and the guide rods are fixedly inserted into the U-shaped part.
As a preferable scheme of the application, the length of the limiting notch is not larger than the length of the blowout regulating square opening.
As a preferable scheme of the application, the spray regulating square opening and the porous passive nozzle are rectangular and have the same length.
As a preferable scheme of the application, a dust removing part is arranged in the cavity shell, a dust discharging port is arranged at the bottom of the cavity shell, the dust removing part is arranged above the joint of the flue gas pipeline and the cavity shell, the dust removing part is used for intercepting and treating the solid particles and discharging desulfurization flue gas, and the dust discharging port is used for discharging the solid particles;
the dust removing part comprises a porous screen plate provided with a pulse ash removing system and a plurality of dust removing cloth bags, the interior of the cavity shell is divided into a turbid air cavity communicated with the flue gas pipeline and a clean air cavity provided with the pulse ash removing system by the porous screen plate, and the top of the cavity shell is provided with a clean air outlet communicated with the clean air cavity.
Compared with the prior art, the application has the following beneficial effects:
according to the embodiment of the application, the slag powder slurry is sprayed into the flue gas pipeline, on one hand, the flue gas flowing at a high speed in the flue gas pipeline is utilized to generate negative pressure in the flue gas pipeline, so that the slag powder slurry is attracted into the flue gas pipeline, the defect of energy consumption increase caused by active spraying of the slag powder slurry is avoided, the magnitude of the negative pressure in the flue gas pipeline is correspondingly increased or reduced along with the increase or decrease of the flow velocity of the flue gas flowing through the flue gas pipeline, and the automatic adjustment of the slag powder slurry quantity entering the flue gas pipeline can be realized. On the other hand, the flue gas carrying slag powder slurry in the flue gas pipeline diffuses in the cavity shell, so that the flue gas and the slag powder slurry are mixed in the cavity shell again, and the desulfurization effect on the flue gas is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
FIG. 1 is a schematic diagram of the overall structure of a steel slag desulfurization device by an exhaust gas sintering method according to the application;
FIG. 2 is a schematic view of the flue gas duct of the present application;
fig. 3 is a schematic structural view of the opening degree adjusting assembly of the present application.
Reference numerals in the drawings are respectively as follows:
1-a slag crushing device; 2-desulfurizing and dedusting device; 17-spiral flow sheet; 18-a spray adjusting mechanism; 19-adjusting a spraying square opening;
201-a cavity housing; 202-a flue gas pipeline; 203-a mixing and stirring device; 204-porous passive nozzle;
2011-a turbid air cavity; 2012-clean air cavity; 2013-an ash discharge port; 2014-a clean gas outlet;
301-a dust removing part; 3011-pulse ash removal system; 3012-a dust removal cloth bag; 3013-a porous mesh plate;
1801-movable inner tube; 1802-guide ribs; 1803-guide slot; 1804-limit notch; 1805-a guide bar; 1806-spring; 1807-a reset lever; 1808-limiting slide block; 1809-U-shaped portion.
Description of the embodiments
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 1 to 3, the present application further provides a waste gas sintering process steel slag desulfurization apparatus, comprising a slag crushing apparatus 1 and a desulfurization dust removal apparatus 2, wherein the slag crushing apparatus 1 crushes the steel slag inputted therein into fine-grained slag powder, and the slag crushing apparatus 1 conveys the produced slag powder into the desulfurization dust removal apparatus 2.
The desulfurization dust collector 2 comprises a cavity shell 201 with a flue gas pipeline 202 and a mixing and stirring device 203 arranged in the flue gas pipeline 202, wherein the mixing and stirring device 203 is connected with a discharge port of the slag crushing device 1, the tail end of the flue gas pipeline 202 is communicated with the interior of the cavity shell 201, and a porous passive nozzle 204 which is connected and communicated with the discharge port of the mixing and stirring device 203 is arranged on the pipe wall of the flue gas pipeline 202 in a penetrating way.
The mixing and stirring device 203 mixes the slag powder conveyed by the slag crushing device 1 with water to prepare slag powder slurry, the flue gas pipeline 202 disperses and atomizes the slag powder slurry in the mixing and stirring device 203 by the porous passive nozzle 204 through the sulfur-containing flue gas flowing at high speed, then the dispersed and atomized slag powder slurry is sucked, and the dispersed and atomized slag powder slurry and the sulfur-containing flue gas are primarily mixed and reacted in the flue gas pipeline 202 to generate desulfurization flue gas containing various solid particles, and then the desulfurization flue gas and the desulfurization flue gas are fed into the cavity shell 201 for diffusion and further mixing and reaction.
The mixing and stirring device 203 is any container with a stirring shaft and stirring blades inside, the mixing and stirring device 203 mixes the slag powder crushed by the slag crushing device 1 with water and then conveys the mixed slag powder into the flue gas pipeline 202 through the porous passive nozzle 204, and the porous passive nozzle 204 preferably has a plurality of micropores so as to facilitate the dispersion of slag powder slurry when entering the flue gas pipeline 202.
In this embodiment, the slag powder slurry is sprayed into the flue gas pipeline 202, on the one hand, the flue gas flowing at a high speed in the flue gas pipeline 202 is utilized to generate negative pressure in the flue gas pipeline 202, so that the slag powder slurry is attracted into the flue gas pipeline 202, the defect of energy consumption increase caused by active spraying of the slag powder slurry is avoided, and the magnitude of the negative pressure in the flue gas pipeline 202 is correspondingly increased or decreased along with the increase or decrease of the flow velocity of the flue gas flowing through the flue gas pipeline 202, so that the automatic adjustment of the slag powder slurry quantity entering the flue gas pipeline 202 can be realized. On the other hand, the flue gas carrying the slag powder slurry in the flue gas pipeline 202 diffuses in the cavity shell 201, so that the flue gas and the slag powder slurry are mixed again in the cavity shell 201, and the desulfurization effect on the flue gas is improved.
It is further optimized in the above embodiment that the desulfurization and dust removal device 2 further includes a plurality of spiral flow sheets 17 for promoting the sufficient mixing of the sulfur-containing flue gas and the slag powder slurry in the flue gas pipeline 202, the plurality of spiral flow sheets 17 are circumferentially and equally spaced on the inner wall of the flue gas pipeline 202, and the porous passive nozzles 204 are provided with a plurality of spiral flow sheets and are all located between adjacent spiral flow sheets 17.
The slag powder slurry produced by the mixing and stirring device 203 is sucked into the flue gas pipeline 202 by the porous passive nozzle 204 through the sulfur-containing flue gas at the spiral flow sheets 17, and the flue gas in the flue gas pipeline 202 rotates when passing through the spiral flow sheets 17, so that the sulfur-containing flue gas in the flue gas pipeline 202 is mixed and reacted with the slag powder slurry, and then flows into the dust removal shell for diffusion and further mixing and reaction.
The spiral flow sheet 17 is spirally disposed along the inner wall of the flue gas pipeline 202, and the thickness of the spiral flow sheet 17 gradually decreases in a direction away from the pipe wall of the flue gas pipeline 202, so as to reduce turbulence at the inner side of the spiral flow sheet 17, which is beneficial to the rotation of the flue gas in the flue gas pipeline 202.
It is further optimized in the above embodiment that the flue gas duct 202 is provided with a spray adjusting mechanism 18, and the spray adjusting mechanism 18 is used for adjusting the opening of the porous passive nozzle 204 in proportion to the flow rate of the sulfur-containing flue gas in the flue gas duct 202, so that the sulfur-containing flue gas in the flue gas duct 202 has a proper proportion with the slag powder slurry.
The spray adjusting mechanism 18 comprises a movable inner tube 1801, a guiding component and an opening resetting component, wherein a plurality of spiral flow sheets 17 are all installed on the inner wall of the movable inner tube 1801, the movable inner tube 1801 is coaxially and slidably installed in the flue gas pipeline 202, the guiding component is used for guiding the axial sliding of the movable inner tube 1801 and circumferentially limiting the movable inner tube 1801, and a spray adjusting square opening 19 for being matched with the porous passive nozzle 201 is formed in the pipe wall of the movable inner tube 1801 in a penetrating mode.
The sulfur-containing flue gas in the flue gas pipeline 202 pushes the movable inner tube 1801 to move when passing through the plurality of spiral flow sheets 17 in the movable inner tube 1801, so that the movable inner tube 1801 is gradually overlapped with the porous passive nozzle 204 by the upward-adjusting spraying square opening 19, and simultaneously, the opening resetting component is used for storing energy, and when the kinetic energy of the sulfur-containing flue gas in the movable inner tube 1801 is reduced, the opening resetting component drives the movable inner tube 1801 to reset by the energy storage, so that the opening of the porous passive nozzle 204 is reduced.
The guiding component is used for preventing the movable inner tube 1801 from rotating, so that when the flue gas passes through the plurality of spiral flow sheets 17 on the inner wall of the movable inner tube 1801, the plurality of spiral flow sheets 17 apply an axial thrust towards the direction of the cavity shell 201, and the opening resetting component stores force, so that the spraying adjusting square opening 19 on the movable inner tube 1801 is overlapped with the porous passive nozzle 201, and the size of the overlapped part of the spraying adjusting square opening 19 and the porous passive nozzle 201 correspondingly changes along with the increase or decrease of the flow rate of the flue gas passing through the movable inner tube 1801, namely the kinetic energy, so as to further accurately adjust the quantity of slag powder slurry mixed with the flue gas.
The guide assembly comprises a plurality of guide raised strips 1802, the plurality of guide raised strips 1802 are arranged around the axis of the movable inner tube 1801 at intervals and are parallel to the axis of the movable inner tube 1801, a plurality of guide grooves 1803 are formed in the outer wall of the movable inner tube 1801, the guide raised strips 1802 are in sliding insertion fit with the guide grooves 1803 in a one-to-one correspondence manner, limit notches 1804 for installing the opening resetting assembly are formed in the inner sides of the plurality of guide raised strips 1802 towards the movable inner tube 1801, guide rods 1805 for inserting the limit notches 1804 are arranged on the groove walls of the guide grooves 1803, the movable inner tube 1801 is in transmission connection with the opening resetting assembly through the guide rods 1805, and the strokes of the movable inner tube 1801 in the directions of two ends are matched with the limit notches 1804 through the guide rods 1805.
The movable inner tube 1801 is axially guided and circumferentially fixed through the cooperation of a plurality of guide raised strips 1802 on the flue gas pipeline 202 and a plurality of guide grooves 1803 on the movable inner tube 1801, and the opening resetting assembly is arranged on the guide raised strips 1802 and connected with the guide rods 1805 in the guide grooves 1803, so that the negative influence of flue gas scouring caused by the arrangement of the opening resetting assembly outside the movable inner tube 1801 is avoided, and the service life of the opening resetting assembly is prolonged.
Wherein, aperture reset assembly includes spring 1806, reset rod 1807 and spacing slider 1808, has seted up the spacing breach 1804 through-hole of intercommunication in the direction sand grip 1802, and the tip of through-hole contracts in order to form spacing hole to the axis direction, and spring 1806 installs in the through-hole, and spacing slider 1808 fixed mounting is on reset rod 1807, and spring 1806 promotes reset rod 1807 through spacing slider 1808, reset rod 1807 and spacing hole sliding fit, reset rod 1807 pass spacing hole and are connected with guide rod 1805.
Further optimized in the above embodiment, the limiting notch 1804 is provided with a plurality of guide grooves 1803, a plurality of guide rods 1805 corresponding to the limiting notches 1804 in a one-to-one mode are installed in the guide grooves 1803, the same reset rod 1807 penetrates through the limiting holes, the through holes, the limiting sliding blocks 1808 and the springs 1806, the reset rod 1807 is provided with a U-shaped portion 1809 located in the limiting notch 1804, the opening of the U-shaped portion 1809 faces the direction of the guide grooves 1803 for inserting the corresponding guide rods 1805, and the guide rods 1805 are fixedly inserted into the U-shaped portion 1809.
A plurality of limit notches 1804 are arranged on the guide convex strips 1802, a plurality of guide rods 1805 connected with reset rods 1807 in the limit notches 1804 are arranged in the same guide groove 1803, which is beneficial to the uniform stress at the two ends of the movable inner tube 1801 and the prevention of the locking of the movable inner tube 1801, the U-shaped part 1809 on the guide rods 1805 realizes the connection of the same reset rod 1807 with a plurality of guide rods 1805 through a plurality of U-shaped parts 1809, is beneficial to the stability of the sliding of the reset rods 1807,
the length of the limit notch 1804 is not greater than the length of the spraying square opening 19, and the spraying square opening 19 and the porous passive nozzle 204 are rectangular and have the same length, so as to ensure accurate matching of the spraying square opening 19 and the porous passive nozzle 204.
A dust removing part 301 is arranged in the cavity shell 201, a dust discharge port 2013 is arranged at the bottom of the cavity shell 201, the dust removing part 301 is arranged above the joint of the flue gas pipeline 202 and the cavity shell 201, the dust removing part 301 is used for intercepting and treating the solid particles and discharging desulfurization flue gas, and the dust discharge port 2013 is used for discharging the solid particles;
the dust removing part 301 comprises a porous net plate 3013 provided with a pulse ash removing system 3011 and a plurality of dust removing cloth bags 3012, the interior of the cavity shell 201 is divided into a turbid air cavity 2011 communicated with the flue gas pipeline 202 and a clean air cavity 2012 provided with the pulse ash removing system 3011 by the porous net plate 3013, and a clean air outlet 2014 communicated with the clean air cavity 2012 is arranged at the top of the cavity shell 201.
The slag powder prepared from the steel slag is mixed with water to form slag powder slurry, the slag powder slurry is injected into the dust removing part 301 of the desulfurization dust removing device 2 through the mixing stirring device 203, and the slag powder slurry reacts with the flue gas in the dust removing part 201 to desulfurize the flue gas, so that the particulate matters in the flue gas are further fused with the reactants of the slag powder slurry and the flue gas, and the yield of solid particles is increased.
The application mainly pulverizes the slag by a slag pulverizing device to prepare powdery slag powder; then mixing the slag powder produced by the slag crushing device with water to produce slag powder slurry by the mixing stirring device, and desulfurizing and dedusting the produced slag powder slurry; into the flue gas duct on the chamber housing; finally, the slag powder slurry conveyed by the mixing stirring device is mixed with sulfur-containing flue gas in a flue gas pipeline through the desulfurization dust removal device and then is input into the cavity shell, so that the sulfur-containing flue gas mixed with the slag powder slurry is further diffused and mixed in the cavity shell and subjected to desulfurization reaction.
By spraying the slag powder slurry into the flue gas pipeline, on one hand, the flue gas flowing at a high speed in the flue gas pipeline is utilized to generate negative pressure in the flue gas pipeline, so that the slag powder slurry is attracted to enter the flue gas pipeline, the defect of energy consumption increase caused by active spraying of the slag powder slurry is avoided, the magnitude of the negative pressure in the flue gas pipeline is correspondingly increased or decreased along with the increase or decrease of the flow velocity of the flue gas flowing through the flue gas pipeline, and the automatic adjustment of the slag powder slurry quantity entering the flue gas pipeline can be realized. On the other hand, the flue gas carrying slag powder slurry in the flue gas pipeline diffuses in the cavity shell, so that the flue gas and the slag powder slurry are mixed in the cavity shell again, and the desulfurization effect on the flue gas is improved.
The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this application will occur to those skilled in the art, and are intended to be within the spirit and scope of the application.

Claims (10)

1. The waste gas sintering method steel slag desulfurization device is characterized by comprising a slag crushing device (1) and a desulfurization dust removal device (2), wherein the slag crushing device (1) is used for crushing steel slag input into the slag crushing device into fine-particle slag powder, and the slag crushing device (1) is used for conveying the produced slag powder into the desulfurization dust removal device (2);
the desulfurization dust removal device (2) comprises a cavity shell (201) with a flue gas pipeline (202) and a mixing stirring device (203) arranged in the flue gas pipeline (202), wherein the mixing stirring device (203) is connected with a discharge hole of the slag crushing device (1), the tail end of the flue gas pipeline (202) is communicated with the interior of the cavity shell (201), and a porous passive nozzle (204) which is connected and communicated with the discharge hole of the mixing stirring device (203) is arranged on the pipe wall of the flue gas pipeline (202) in a penetrating manner;
the mixing stirring device (203) mixes the slag powder conveyed by the slag crushing device (1) with water to prepare slag powder slurry, the flue gas pipeline (202) dispersedly atomizes the slag powder slurry in the mixing stirring device (203) through sulfur-containing flue gas flowing at high speed, then sucks the slag powder slurry, the dispersed atomized slag powder slurry is primarily mixed and reacted with sulfur-containing flue gas in the flue gas pipeline (202) to generate desulfurization flue gas containing various solid particles, and the desulfurization flue gas containing various solid particles enters the cavity shell (201) for diffusion and further mixing and reaction.
2. The exhaust gas sintering process steel slag desulfurization apparatus as set forth in claim 1, wherein said desulfurization dust removal apparatus (2) further comprises a plurality of spiral flow sheets (17) for promoting sufficient mixing of said sulfur-containing flue gas and said slag powder slurry in said flue gas duct (202), a plurality of said spiral flow sheets (17) being circumferentially mounted on the inner wall of said flue gas duct (202) at equal intervals, said porous passive nozzles (204) being provided in plurality and each being located between adjacent said spiral flow sheets (17);
the slag powder slurry produced by the mixing and stirring device (203) is sucked into the flue gas pipeline (202) through the sulfur-containing flue gas at the spiral flow sheet (17) by the porous passive nozzle (204), and the flue gas in the flue gas pipeline (202) rotates when passing through a plurality of spiral flow sheets (17), so that the sulfur-containing flue gas in the flue gas pipeline (202) is mixed and reacted with the slag powder slurry, and then flows into the dust removal shell for diffusion and further mixing and reaction.
3. The exhaust gas sintering process steel slag desulfurization apparatus as set forth in claim 2 wherein said spiral flow sheet (17) is spirally disposed along the inner wall of said flue gas duct (202) and the thickness of said spiral flow sheet (17) is gradually reduced in a direction away from the wall of said flue gas duct (202).
4. The waste gas sintering process steel slag desulfurization device according to claim 1, wherein a blowout control mechanism (18) is arranged in the flue gas pipeline (202), and the blowout control mechanism (18) is used for adjusting the opening of the porous passive nozzle (204) in a proportional manner according to the flow rate of the sulfur-containing flue gas in the flue gas pipeline (202) so as to enable the sulfur-containing flue gas in the flue gas pipeline (202) to have a proper proportion with the slag powder slurry;
the spray adjusting mechanism (18) comprises a movable inner pipe (1801), a guide assembly and an opening resetting assembly, a plurality of spiral flow sheets (17) are all installed on the inner wall of the movable inner pipe (1801), the movable inner pipe (1801) is coaxially and slidably installed in the flue gas pipeline (202), the guide assembly is used for guiding the axial sliding of the movable inner pipe (1801) and circumferentially limiting the movable inner pipe (1801), and a spray adjusting square opening (19) for being matched with the porous passive nozzle (201) is formed in the pipe wall of the movable inner pipe (1801) in a penetrating mode;
the sulfur-containing flue gas in the flue gas pipeline (202) pushes the movable inner pipe (1801) to move when passing through a plurality of spiral flow sheets (17) in the movable inner pipe (1801), so that the spraying square opening (19) on the movable inner pipe (1801) is gradually overlapped with the porous passive nozzle (204) and simultaneously stores energy of the opening resetting component, and the opening resetting component drives the movable inner pipe (1801) to reset through energy storage when the kinetic energy of the sulfur-containing flue gas in the movable inner pipe (1801) is reduced so as to reduce the opening of the porous passive nozzle (204).
5. The steel slag desulfurization device according to claim 4, wherein the guide assembly comprises a plurality of guide raised strips (1802), the guide raised strips (1802) are arranged around the axis of the movable inner tube (1801) at intervals and are parallel to the axis of the movable inner tube (1801), a plurality of guide grooves (1803) are formed in the outer wall of the movable inner tube (1801), the guide raised strips (1802) are in sliding plug-in fit with the guide grooves (1803) one by one, limit gaps (1804) for installing the opening resetting assembly are formed in the guide raised strips (1802) towards the inner side of the movable inner tube (1801), guide rods (1805) for inserting the limit gaps (1804) are arranged on the groove walls of the guide grooves (1803), the movable inner tube (1801) and the opening resetting assembly are in transmission connection through the guide rods (1805), and the movable inner tube (1801) is in two-end direction and is in limit fit with the limit gaps (1804).
6. The steel slag desulfurization device according to claim 5, wherein the opening reset assembly comprises a spring (1806), a reset rod (1807) and a limit slider (1808), a through hole which is communicated with the limit notch (1804) is formed in the guide raised strip (1802), the end of the through hole contracts towards the axis direction to form the limit hole, the spring (1806) is installed in the through hole, the limit slider (1808) is fixedly installed on the reset rod (1807), the spring (1806) pushes the reset rod (1807) through the limit slider (1808), the reset rod (1807) is in sliding fit with the limit hole, and the reset rod (1807) penetrates through the limit hole and is connected with the guide rod (1805).
7. The steel slag desulfurization device according to claim 6, wherein a plurality of limit notches (1804) are provided, a plurality of guide rods (1805) corresponding to the limit notches (1804) one by one are installed in the guide groove (1803), the same reset rod (1807) penetrates through the limit holes, the through holes, the limit sliders (1808) and the springs (1806), the reset rod (1807) is provided with a U-shaped portion (1809) located in the limit notch (1804), an opening of the U-shaped portion (1809) faces the direction of the guide groove (1803) for inserting the corresponding guide rods (1805), and the guide rods (1805) are fixedly inserted into the U-shaped portion (1809).
8. The exhaust gas sintering process steel slag desulfurization apparatus as set forth in claim 5 wherein the length of said limiting notch (1804) is not greater than the length of said flow control square opening (19).
9. The apparatus for desulfurizing steel slag by sintering waste gas according to claim 4, wherein said spray adjusting square opening (19) and said porous passive nozzle (204) are rectangular and have the same length.
10. The waste gas sintering process steel slag desulfurization device according to claim 1, wherein,
a dust removing part (301) is arranged in the cavity shell (201), a dust discharging port (2013) is arranged at the bottom of the cavity shell (201), the dust removing part (301) is arranged above the joint of the flue gas pipeline (202) and the cavity shell (201), the dust removing part (301) is used for intercepting and treating the solid particles and discharging desulfurization flue gas, and the dust discharging port (2013) is used for discharging the solid particles;
the dust removing part (301) comprises a porous net plate (3013) provided with a pulse dust removing system (3011) and a plurality of dust removing cloth bags (3012), the interior of the cavity shell (201) is divided into a turbid air cavity (2011) communicated with the flue gas pipeline (202) and a clean air cavity (2012) provided with the pulse dust removing system (3011) through the porous net plate (3013), and a clean air outlet (2014) communicated with the clean air cavity (2012) is arranged at the top of the cavity shell (201).
CN202310517325.6A 2023-05-10 2023-05-10 Waste gas sintering method slag desulfurization device Withdrawn CN116651188A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310517325.6A CN116651188A (en) 2023-05-10 2023-05-10 Waste gas sintering method slag desulfurization device

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Application Number Priority Date Filing Date Title
CN202310517325.6A CN116651188A (en) 2023-05-10 2023-05-10 Waste gas sintering method slag desulfurization device

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