CN112342337A - Dry type waste heat recovery and dust removal device and method for converter flue gas - Google Patents
Dry type waste heat recovery and dust removal device and method for converter flue gas Download PDFInfo
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- CN112342337A CN112342337A CN202011215354.XA CN202011215354A CN112342337A CN 112342337 A CN112342337 A CN 112342337A CN 202011215354 A CN202011215354 A CN 202011215354A CN 112342337 A CN112342337 A CN 112342337A
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- dust removal
- flue gas
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2100/00—Exhaust gas
- C21C2100/02—Treatment of the exhaust gas
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2100/00—Exhaust gas
- C21C2100/06—Energy from waste gas used in other processes
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The embodiment of the invention discloses a dry type waste heat recovery and dust removal device and method for converter flue gas, which comprises a recovery dust removal pipeline connected with an exhaust port of a converter, wherein a particle adhesion prevention mechanism and a dust collection mechanism are sequentially arranged inside the recovery dust removal pipeline from bottom to top, and a plurality of uniformly distributed heat exchange mechanisms are arranged outside the recovery dust removal pipeline; flue gas of the converter is subjected to multi-stage waste heat recovery through a plurality of heat exchange mechanisms, the cooled flue gas passes through a particle adhesion prevention mechanism for primary dust removal, the flue gas subjected to primary dust removal enters a dust collection mechanism for secondary dust removal, and the particle adhesion prevention mechanism absorbs molten particles in the flue gas by wrapping so as to prevent the molten particles from scattering and adhering to the inner wall of a recovery dust removal pipeline; the scheme effectively avoids the molten state ash slag carried by the high-temperature and high-pressure flue gas from adhering to the ventilation pipeline, and improves the heat exchange efficiency of unit volume.
Description
Technical Field
The embodiment of the invention relates to the technical field of flue gas treatment, in particular to a dry type waste heat recovery and dust removal device and method for converter flue gas.
Background
The converter steelmaking uses molten iron, scrap steel and ferroalloy as main raw materials, does not need external energy, and completes the steelmaking process in the converter by means of heat generated by physical heat of molten iron and chemical reaction among molten iron components. The converter is divided into acid and alkaline according to refractory materials, and top blowing, bottom blowing and side blowing are carried out according to the positions of gas blown into the converter; according to the gas types, the converter comprises an air separation converter and an oxygen converter. The basic oxygen top-blown converter and the top-bottom combined blown converter are the most commonly used steelmaking equipment due to high production speed, high yield, high single-furnace yield, low cost and low investment. The converter is mainly used for producing carbon steel, alloy steel and smelting copper and nickel.
In the process of steelmaking, a converter can generate a large amount of brown flue gas, the main components of which are iron oxide dust particles, high-concentration carbon monoxide gas and the like, so that the brown flue gas must be purified, recycled and comprehensively utilized to prevent environmental pollution, wherein the iron oxide dust particles obtained from recycling equipment can be used for steelmaking; carbon monoxide can be used as a chemical raw material or a fuel; the heat brought out by the flue gas can be used for generating steam as a byproduct.
However, the existing waste heat recovery dust removal device has the following defects: the high-temperature hot gas generated by the converter contains molten iron oxide particles, and the iron oxide particles are easy to stick in the pipeline of the waste heat recovery dust removal device to form a shielding layer, so that the efficiency of recovering the heat of the flue gas is influenced.
Disclosure of Invention
Therefore, the embodiment of the invention provides a dry type waste heat recovery and dust removal device and method for converter flue gas, and aims to solve the problem that iron oxide particles are easy to stick in a pipeline of the waste heat recovery and dust removal device to form a shielding layer in the prior art, so that the efficiency of flue gas heat recovery is influenced.
In order to achieve the above object, an embodiment of the present invention provides the following:
a dry type waste heat recovery and dust removal device for converter flue gas comprises a recovery dust removal pipeline connected with an exhaust port of a converter, wherein a particle adhesion prevention mechanism and a dust collection mechanism are sequentially arranged inside the recovery dust removal pipeline from bottom to top, a plurality of uniformly distributed heat exchange mechanisms are arranged outside the recovery dust removal pipeline, the tail end of the recovery dust removal pipeline is connected with a fine dust removal chamber, and a gas outlet of the fine dust removal chamber is connected with a gas collection tank;
flue gas from the bottom up of converter is in proper order a plurality of heat transfer mechanism carries out multistage waste heat recovery to flue gas after the cooling passes prevent that granule adhesion mechanism once removes dust, and the flue gas that once removes dust gets into collection dirt mechanism carries out the secondary and removes dust, prevent that granule adhesion mechanism adsorbs the molten state granule in the flue gas through the parcel and is in order to avoid molten state granule scattering adhesion retrieve the dust removal pipeline inner wall, the parallel cover of collection dirt mechanism is established retrieve the inboard of dust removal pipeline and with the shielding granule in the flue gas is piled up retrieve the dust removal pipeline inner wall.
As a preferable scheme of the present invention, the particle adhesion preventing mechanism includes a plurality of filter screen plates which are arranged inside the recycling dust removing pipeline and are distributed in a stacked manner, edges of the plurality of filter screen plates are sealed, and a center position of each filter screen plate is raised upward, and each filter screen plate is configured to intercept molten state particles in flue gas of the converter, and when a temperature of the filter screen plate at the lowermost layer is raised to a set temperature, the filter screen plates fall into the converter to be melted, so that heat energy of the filter screen plates is recycled.
As a preferred scheme of the invention, the recovery dust removal pipeline is sequentially divided into a first-stage cooling dust removal recovery section and a second-stage cooling dust collection section from bottom to top, the heat exchange mechanism is wrapped on the outer surfaces of the primary cooling and dedusting recovery section and the secondary cooling and dust collecting section, the surface of the first-stage cooling and dedusting recovery section is provided with a cutting groove, a sealing panel is hinged on the cutting groove, the lower end of the inner surface of the sealing panel is provided with an arc-shaped supporting plate, and the inner surface of the sealing panel is provided with a plate placing groove above the arc-shaped supporting plate, two parallel side edges of the plate placing groove are provided with first baffle plates, a movable shifting plate is arranged in a gap between the first baffle and the article placing groove, the upper end of the movable shifting plate is provided with a circular ring lower pressing plate, the movable shifting plate presses the filter screen plate between the circular ring lower pressing plate and the movable shifting plate under the action of gravity.
As a preferable scheme of the invention, the outer diameter of the annular lower pressing plate is the same as the inner diameter of the recycling dust removal pipeline, the distance between the installation position of the annular lower pressing plate and the upper end of the first baffle plate is the same as the height of the filter screen plate, the inner wall of the recycling dust removal pipeline is provided with a second baffle plate which is the same as the first baffle plate, and the first baffle plate and the second baffle plate are used for supporting the filter screen plate.
As a preferable scheme of the invention, the filter screen plate comprises lantern rings and high-temperature adsorption screen plates installed on the inner surface of each lantern ring, the upper surface of each lantern ring is provided with a plurality of uniformly distributed inner sinking grooves, the lower surface of each lantern ring is provided with a plurality of uniformly distributed insertion rods, the insertion rods are fixed in the inner sinking grooves to stack the lantern rings up and down, and the lantern rings stacked up and down cover the plate placing grooves and the inner surface of the recovery dust removal pipeline to wrap particles in the flue gas inside the high-temperature adsorption screen plates.
As a preferred scheme of the invention, each lantern ring is connected with the high-temperature adsorption screen plates through a melting transition ring, a plurality of clamping points which are uniformly distributed are arranged on the inner side edge of each melting transition ring, the clamping points on the inner edge of each melting transition ring are used for fixing the high-temperature adsorption screen plates, the centers of the high-temperature adsorption screen plates are protruded upwards, and the central curvatures of all the high-temperature adsorption screen plates are sequentially increased from bottom to top.
As a preferable scheme of the invention, a plurality of salient points are arranged on the lower surface of the high-temperature adsorption screen plate, gaps between adjacent salient points are used for adsorbing high-temperature particles in flue gas, and a plurality of uniformly distributed air outlets are arranged on the high-temperature adsorption screen plate.
In a preferred embodiment of the present invention, the widths of the first baffle and the second baffle are the same, and the width of the first baffle is equal to the sum of the width of the collar and the width of the melt transition ring.
In addition, the invention provides a dry type waste heat recovery and dust removal method for converter flue gas, which comprises the following steps:
step 100, arranging a filter screen plate in the recovery dust removal pipeline, wherein the filter screen plate realizes first-order waste heat recovery and dust removal treatment on high-temperature flue gas;
200, enabling the flue gas filtered by the filter screen plate to enter a vacuum heat exchange mechanism, and carrying out heat exchange and cooling treatment on the high-temperature flue gas by the vacuum heat exchange mechanism so as to realize second-order waste heat recovery and dust removal treatment on the high-temperature flue gas;
300, guiding the flue gas subjected to the second-order waste heat recovery and dust removal treatment into a fine dust removal chamber to perform tertiary fine dust removal operation;
and step 400, allowing the flue gas subjected to the three times of fine dust removal to enter a gas collection chamber for collection.
As a preferred scheme of the present invention, in step 100, the specific implementation steps of the filter screen plate to implement the first-order waste heat recovery and dust removal treatment on the high temperature flue gas are as follows:
102, after each layer of flue gas adsorption plate is heated to a specific temperature, the lowest layer of flue gas adsorption plate is in heat transfer with high-temperature flue gas and then falls off and sinks into a converter so as to recycle the residual heat of the high-temperature flue gas;
and 103, moving the upper smoke adsorption plate downwards to serve as the lowest smoke adsorption plate, and continuously performing dust removal and waste heat absorption operation on the high-temperature smoke.
The embodiment of the invention has the following advantages:
(1) according to the invention, the high-temperature and high-pressure flue gas can be prevented from scattering through the wrapping filtration of the high-temperature and high-pressure flue gas, so that molten state ash slag carried by the high-temperature and high-pressure flue gas is effectively prevented from adhering to the ventilation pipeline, and the heat exchange efficiency of unit volume is improved;
(2) when the filtering mechanism reaches the filtering limit, the filtering mechanism automatically falls to the converter for smelting, so that the waste heat of the flue gas absorbed by the filtering mechanism is recycled, and the waste heat recovery efficiency of the flue gas of the converter is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic view of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a half-sectional structure of a secondary temperature-reducing dust-collecting section according to an embodiment of the present invention;
FIG. 3 is a schematic view of a single filter screen configuration in an embodiment of the invention;
FIG. 4 is a schematic view of a collar structure in an embodiment of the invention;
FIG. 5 is a schematic view of a stacked configuration of filter screen panels in an embodiment of the present invention;
fig. 6 is a flow chart of a waste heat recovery and dust removal method according to an embodiment of the present invention.
In the figure: 1-recovering a dust removal pipeline; 2-a particle adhesion prevention mechanism; 3-a dust collecting mechanism; 4-a heat exchange mechanism; 5-fine dust removal chamber; 6-a gas collecting tank; 7-cutting the groove; 8-sealing the panel; 9-arc support plate; 10-placing a plate groove; 11-a first baffle; 12-a movable shifting plate; 13-a circular lower pressing plate; 14-a second baffle;
101-first-stage cooling and dedusting recovery section; 102-a secondary temperature reduction dust collection section;
201-a filter screen plate;
2011-collar; 2012-high temperature adsorption screen; 2013-inner sinking groove; 2014-plug rod; 2015-melting the transition ring; 2016-point snap; 2017-salient point; 2018-air outlet.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides a dry type waste heat recovery and dust removal device and method for converter flue gas, the present embodiment can avoid scattering of high-temperature and high-pressure flue gas by wrapped filtering of high-temperature and high-pressure flue gas, thereby effectively preventing molten ash carried by high-temperature and high-pressure flue gas from adhering to an air duct, and improving heat exchange efficiency per unit volume, and meanwhile, the filtering mechanism of the present embodiment automatically falls to a converter to be smelted when reaching a filtering limit, so as to recycle flue gas waste heat absorbed by the filtering mechanism, thereby improving waste heat recovery efficiency of converter flue gas.
Specifically include the recovery dust removal pipeline 1 of being connected with the gas vent of converter, the inside from the bottom up of retrieving dust removal pipeline 1 is equipped with in proper order and prevents granule adhesion mechanism 2 and collection dirt mechanism 3, and the externally mounted of retrieving dust removal pipeline 1 has a plurality of evenly distributed's heat transfer mechanism 4, and the end-to-end connection of retrieving dust removal pipeline 1 has smart clean room 5, and the gas outlet of smart clean room 5 is connected with gas collection tank 6.
The flue gas from the bottom up of converter carries out multistage waste heat recovery through a plurality of heat transfer mechanism 4 in proper order, retrieves dust removal pipeline 1 from the bottom up and divides into one-level cooling dust removal recovery section 101 and second grade cooling dust collection section 102 in proper order, and heat transfer mechanism 4 wraps up the surface at one-level cooling dust removal recovery section 101 and second grade cooling dust collection section 102.
It should be added that, in this embodiment, the thermal conductivity of the recycling dust-removing duct 1 is not fixed, and the primary cooling section 101 and the secondary cooling dust-collecting section 102 are heat-conducting ducts, so that the heat exchange mechanism 4 absorbs the heat of the high-temperature flue gas on the outer surfaces of the primary cooling dust-removing recycling section 101 and the secondary cooling dust-collecting section 102 in time.
The flue gas after cooling passes through the particle adhesion prevention mechanism 2 to carry out primary dust removal, the flue gas after primary dust removal enters the dust collection mechanism 3 to carry out secondary dust removal, the particle adhesion prevention mechanism 2 adsorbs molten particles in the flue gas by wrapping so as to prevent the molten particles from scattering and adhering to the inner wall of the recovery dust removal pipeline 1, and the dust collection mechanism 3 is sleeved on the inner side of the recovery dust removal pipeline 1 in parallel and is used for shielding particles in the flue gas from accumulating on the inner wall of the recovery dust removal pipeline 1.
Generally, the temperature of the flue gas of the converter is 700 ℃ to 800 ℃, so the components of the high-temperature flue gas of the converter are mostly high-concentration carbon monoxide gas and iron oxide dust particles in a molten state, and the iron oxide particles can be put into the converter again for smelting after being recovered, so the embodiment not only realizes heat recovery of the high-temperature flue gas, but also realizes recycling of the iron oxide particles.
Wherein to the recovery of high temperature flue gas mainly rely on multistage distribution's heat transfer mechanism 4 to carry out the heat exchange, the recovery dust removal pipeline 1 of this embodiment roughly divide into to the processing procedure of high temperature flue gas: the integrated integration of cooling, dust removal and cooling dust removal, the heat exchange mechanism 4 reduces the high-temperature and high-pressure flue gas to 350 ℃ -450 ℃ in the first-stage cooling dust removal recovery section 101, the flue gas after the first-stage cooling further utilizes the particle adhesion prevention mechanism 2 to recover iron oxide particles in the flue gas, the flue gas after the primary particle recovery is transferred to the second-stage cooling dust collection section 102 to carry out second-stage cooling and dust removal operations, a large amount of iron oxide particles are recovered, the temperature of the flue gas is reduced to 50 ℃ -60 ℃, and finally the flue gas containing a small amount of iron oxide particles is completely filtered by the fine dust removal chamber 5 and then is introduced into the gas collection tank 6.
Further, as shown in fig. 3, the anti-particle adhesion mechanism 2 includes a plurality of filter screen plates 201 which are installed inside the recycling dust removal pipeline 1 and are distributed in a stacked manner, edges of the plurality of filter screen plates 201 are sealed, and center positions of the filter screen plates 201 are raised upwards, the filter screen plates 201 are used for intercepting molten particles in flue gas of the converter, and when the temperature of the filter screen plate 201 at the lowest layer is raised to a set temperature, the molten particles fall into the converter to be melted, so that heat energy of the filter screen plates 201 can be recycled.
In the embodiment, the particles in the molten state adhere to the surface of the filter screen 201 to remove dust, and the flue gas from which the molten particles are removed enters the secondary cooling dust collection section 102 to perform the secondary cooling dust removal operation, but the iron oxide particles adhered to the filter screen 202 are not easy to remove, and the air holes on the filter screen 202 are also blocked by the iron oxide after long-term use, so the recycling value of the filter screen 201 is low. In addition, when the iron oxide particles are adhered to the filter screen plate 202 and the high-temperature flue gas passes through the filter screen plate 201, the filter screen plate 202 absorbs heat of the high-temperature flue gas, so that heat loss of the high-temperature flue gas occurs.
Therefore, in the present embodiment, the filter screen plates 201 are designed to be automatically dropped, and when the filter screen plates 201 at the lowest layer are used for a certain time or the surface temperature rises to a set value, the filter screen plates 201 at the lowest layer automatically drop into the converter to be melted, so that the heat energy of the filter screen plates 201 can be recycled.
As shown in fig. 2, the surface of the first-stage cooling and dust removing recovery section 101 is provided with a cutting groove 7, the cutting groove 7 is hinged with a sealing panel 8, the lower end of the inner surface of the sealing panel 8 is provided with an arc-shaped supporting plate 9, a plate placing groove 10 is arranged above the arc-shaped supporting plate 9 on the inner surface of the sealing panel 8, two parallel sides of the plate placing groove 10 are provided with a first baffle 11, the first baffle 11 and a movable shifting plate 12 are arranged in a gap between the plate placing grooves 10, the upper end of the movable shifting plate 12 is provided with a ring lower pressing plate 13, and the movable shifting plate 12 presses a filter screen plate 201 between the ring lower pressing plate 13 and the movable shifting plate 12 under the action of gravity.
The filter screen plate 201 of the embodiment is replaced and reinstalled by opening the sealing panel 8, and the movable shifting plate 12 can move up and down, so the stacking number of the filter screen plate 201 can be set according to requirements, the maximum stacking thickness is the same as the height of the plate placing groove 10, the movable shifting plate 12 presses the filter screen plate 201 between the annular lower pressing plate 13 and the movable shifting plate 12 under the action of gravity, and the mounting and using stability of the filter screen plate 201 is improved.
The outer diameter of the annular lower pressing plate 13 is the same as the inner diameter of the recovery dust removal pipeline 1, the distance between the installation position of the annular lower pressing plate 13 and the upper end of the first baffle plate 11 is the same as the height of the filter screen plate 201, the inner wall of the recovery dust removal pipeline 1 is provided with a second baffle plate 14 which is the same as the first baffle plate 11 in position, and the first baffle plate 11 and the second baffle plate 14 are used for supporting the filter screen plate 201.
As shown in fig. 3 to 5, the filter screen 201 includes a collar 2011 and a high temperature adsorption screen 2012 installed on an inner surface of each collar 2011, an upper surface of each collar 2011 is provided with a plurality of inner sinking grooves 2013 which are uniformly distributed, a lower surface of each collar 2011 is provided with a plurality of uniformly distributed inserting rods 2014, the inserting rods 2014 are fixed in the inner sinking grooves 2013 to stack the plurality of collars 2011 up and down, and the collar 2011 stacked up and down covers an inner surface of the recovery dust removal duct 1 to wrap particles in the flue gas inside the high temperature adsorption screen 2012.
Connect through melting transition ring 2015 between every lantern ring 2011 and the high temperature adsorption otter board 2012, all be equipped with a plurality of evenly distributed's buckle point 2016 on the inboard edge of melting transition ring 2015, the buckle point 2016 of melting transition ring 2015 inward flange is used for fixed high temperature adsorption otter board 2012, and the center of high temperature adsorption otter board 2012 is upwards protruding to the central curvature from the bottom up of all high temperature adsorption otter boards 2012 increases in proper order.
It should be added that the flow velocity of the high-temperature and high-pressure flue gas passing through the primary cooling and dust removing recovery section 101 is high, so that the heat exchange mechanism 4 has low cooling efficiency for the high-temperature and high-pressure flue gas in the primary cooling section 101, and the temperature of the flue gas after being cooled for one time is still high, and therefore, in the embodiment, the filter screen 201 is used for filtering and collecting molten particles in the flue gas.
The specific adsorption filtration principle is as follows: the filter screen 201 of this embodiment is not the integrated molding, filter screen 201 is from outside to inside by the lantern ring 2011, melting transition ring 2015 and high temperature adsorb otter board 2012 and constitute, fix in heavy groove 2013 including through ann inserted bar 2014 and stack up from top to bottom with a plurality of lantern rings 2011, consequently, lantern ring 2011 from top to bottom range upon range of is encapsulated situation, consequently, the flue gas is when filtering screen 201, can not remove dust to the inner wall of retrieving section 101 to the one-level cooling, thereby the effectual molten state lime-ash adhesion of avoiding high temperature high pressure flue gas to smuggle secretly is in one-level cooling dust removal recovery section 101, unit volume heat exchange efficiency has been improved, the waste of the energy is avoided.
In addition, the high-temperature adsorption mesh plates 2012 of the embodiment protrude upwards, the curved surfaces at the center positions of the high-temperature adsorption mesh plates 2012 provide a temporary retention space for the flue gas, so that the flue gas is prevented from scattering under the resisting action of the high-temperature adsorption mesh plates 2012 to adhere molten state ash and slag in the primary cooling and dust removing recovery section 101, and the recovery efficiency of the iron oxide is further improved.
The lower surface of the high-temperature adsorption screen plate 2012 is provided with a plurality of salient points 2017, gaps between the adjacent salient points 2017 are used for adsorbing high-temperature particles in flue gas, and the high-temperature adsorption screen plate 2012 is provided with a plurality of uniformly distributed air outlets 2018.
The gas in the high-temperature flue gas continuously transfers through the air outlet 2018 of the high-temperature adsorption screen 2012, and the molten particles in the high-temperature flue gas are fixedly adhered to gaps among the plurality of salient points 2017 on the surface of the high-temperature adsorption screen 2012 so as to recover the molten particles, but after the high-temperature flue gas is used for a period of time, more and more molten particles are adhered to the air outlet 2018 and are precipitated, so that the high-temperature adsorption screen 2012 cannot perform normal dust removal and filtration work.
In order to solve the above problems, after the high-temperature adsorption mesh plate 2012 is used for a certain time, the high-temperature adsorption mesh plate 2012 is continuously heated due to the heat transfer of the high-temperature flue gas, and the melting point of the melting transition ring 2012 is set to be 400-450 ℃, so that when the temperature of the high-temperature adsorption mesh plate 2012 is continuously increased to a temperature range where the melting point is located, the fastening point 2016 on the inner edge of the melting transition ring 2015 is melted, the high-temperature adsorption mesh plate 2012 is released, the high-temperature adsorption mesh plate 2012 on the lowest layer falls into the converter to be smelted, the high-temperature adsorption mesh plate on the upper layer becomes the high-temperature adsorption.
In addition, the widths of the first baffle plate 11 and the second baffle plate 14 are the same, and the width of the first baffle plate 11 is equal to the sum of the width of the collar 2011 and the width of the melting transition ring 2012, when the snap point 2016 is melted, the collar 2011 is stably placed on the first baffle plate 11 and the second baffle plate 14, so the collar 2011 can be recycled. And the melting transition ring 2015 and the high-temperature adsorption mesh plate 2012 fall into the converter, so that the waste heat of the flue gas is recycled.
In addition, as shown in fig. 6, the invention also provides a dry type waste heat recovery and dust removal method for converter flue gas, which comprises the following steps:
step 100, arranging a filter screen plate in the recovery dust removal pipeline, wherein the filter screen plate realizes first-order waste heat recovery and dust removal treatment on high-temperature flue gas;
200, enabling the flue gas filtered by the filter screen plate to enter a vacuum heat exchange mechanism, and carrying out heat exchange and cooling treatment on the high-temperature flue gas by the vacuum heat exchange mechanism so as to realize second-order waste heat recovery and dust removal treatment on the high-temperature flue gas;
300, guiding the flue gas subjected to the second-order waste heat recovery and dust removal treatment into a fine dust removal chamber to perform tertiary fine dust removal operation;
and step 400, allowing the flue gas subjected to the three times of fine dust removal to enter a gas collection chamber for collection.
In step 100, the specific implementation steps of the filter screen plate for realizing the first-order waste heat recovery and dust removal treatment of the high-temperature flue gas are as follows:
102, after each layer of flue gas adsorption plate is heated to a specific temperature, the lowest layer of flue gas adsorption plate is in heat transfer with high-temperature flue gas and then falls off and sinks into a converter so as to recycle the residual heat of the high-temperature flue gas;
and 102, moving the upper flue gas adsorption plate downwards to serve as the lowest flue gas adsorption plate, and continuously performing dust removal and waste heat absorption operation on the high-temperature flue gas.
The implementation mode has the advantages of two aspects by the design of the filter screen plate, and the first point is that the molten state particles in the flue gas are effectively filtered and removed, and the molten state particles are effectively adhered to the filter screen plate with a rough surface, so that the flue gas dedusting effect is good, and the problem that the molten state particles are adhered to the surface of a recovery dedusting pipeline to influence the waste heat recovery of a heat exchange mechanism on the high-temperature flue gas is effectively avoided; and secondly, due to the design of the stacked filter screen plates, the filter screen plate at the lowest layer is used for filtering a large amount of particles, the temperature is increased fastest, air holes of the filter screen plate at the lowest layer are easy to block, and the particles adhered to the filter screen plate are difficult to clean and recycle, so that the filter screen plate of the embodiment is automatically dropped after being heated to a specified temperature after being used for a period of time and sinks into the converter for melting, so that the filtered molten particles are recycled on one hand, and part of the heat of high-temperature flue gas is recycled on the other hand.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The dry type waste heat recovery and dust removal device for the converter flue gas is characterized by comprising a recovery dust removal pipeline (1) connected with an exhaust port of a converter, wherein a particle adhesion prevention mechanism (2) and a dust collection mechanism (3) are sequentially arranged inside the recovery dust removal pipeline (1) from bottom to top, a plurality of uniformly distributed heat exchange mechanisms (4) are mounted outside the recovery dust removal pipeline (1), the tail end of the recovery dust removal pipeline (1) is connected with a fine dust removal chamber (5), and a gas outlet of the fine dust removal chamber (5) is connected with a gas collection tank (6);
the flue gas from the bottom up of converter is in proper order a plurality of heat transfer mechanism (4) carry out multistage waste heat recovery to flue gas after the cooling passes prevent that granule adhesion mechanism (2) once removes dust, and the flue gas that once removes dust gets into collection dirt mechanism (3) carry out the secondary and removes dust, prevent that molten state granule in granule adhesion mechanism (2) through the parcel adsorption flue gas is in order to avoid molten state granule scattering adhesion retrieve dust removal pipeline (1) inner wall, collection dirt mechanism (3) parallel cover is established retrieve the inboard of dust removal pipeline (1) and with the shielding granule in the flue gas is piled up retrieve dust removal pipeline (1) inner wall.
2. The dry type waste heat recovery and dust removal device for converter flue gas according to claim 1, wherein the particle adhesion prevention mechanism (2) comprises a plurality of filter screen plates (201) which are arranged inside the recovery and dust removal pipeline (1) and distributed in a stacked manner, edges of the plurality of filter screen plates (201) are sealed, and the center positions of the filter screen plates (201) are raised upwards, the filter screen plates (201) are used for intercepting molten-state particles in flue gas of the converter, and when the temperature of the filter screen plate (201) at the lowest layer is raised to a set temperature, the filter screen plates fall into the converter to be melted so as to recycle heat energy of the filter screen plates (201).
3. The dry type waste heat recovery and dust removal device for converter flue gas according to claim 2, wherein the recovery and dust removal pipeline (1) is sequentially divided into a primary cooling and dust removal recovery section (101) and a secondary cooling and dust collection section (102) from bottom to top, the heat exchange mechanism (4) is wrapped on the outer surfaces of the primary cooling and dust removal recovery section (101) and the secondary cooling and dust collection section (102), a cutting groove (7) is formed in the surface of the primary cooling and dust removal recovery section (101), a sealing panel (8) is hinged to the cutting groove (7), an arc-shaped support plate (9) is arranged at the lower end of the inner surface of the sealing panel (8), a plate placing groove (10) is formed in the upper portion of the arc-shaped support plate (9) on the inner surface of the sealing panel (8), and first baffle plates (11) are installed on two parallel side edges of the plate placing groove (10), first baffle (11) with be equipped with movable shifting board (12) in putting the clearance between thing recess (10), the upper end of activity shifting board (12) is equipped with ring holding down plate (13), activity shifting board (12) receive the action of gravity will filter screen plate (201) suppression be in ring holding down plate (13) with between the activity shifting board (12).
4. The dry type waste heat recovery and dust removal device for converter flue gas according to claim 3, wherein the outer diameter of the annular lower pressing plate (13) is the same as the inner diameter of the recovery dust removal pipeline (1), the distance between the installation position of the annular lower pressing plate (13) and the upper end of the first baffle plate (11) is the same as the height of the filter screen plate (201), the inner wall of the recovery dust removal pipeline (1) is provided with a second baffle plate (14) which is the same as the first baffle plate (11), and the first baffle plate (11) and the second baffle plate (14) are used for supporting the filter screen plate (201).
5. The dry type waste heat recovery and dust removal device for the converter flue gas as claimed in claim 3, wherein the filter screen (201) comprises a collar (2011) and a high temperature adsorption screen (2012) installed on the inner surface of each collar (2011), the upper surface of each collar (2011) is provided with a plurality of uniformly distributed inner sinking grooves (2013), the lower surface of each collar (2011) is provided with a plurality of uniformly distributed inserting rods (2014), the inserting rods (2014) are fixed in the inner sinking grooves (2013) to stack the collars (2011) up and down, and the upper and lower stacked collars (2011) cover the plate placing grooves (10) and the inner surface of the recovery and dust removal pipeline (1) to wrap particles in the flue gas inside the high temperature screen adsorption screen (2012).
6. The dry type waste heat recovery and dust removal device for the converter flue gas according to claim 5, wherein each of the collars (2011) is connected with the high temperature adsorption screen plates (2012) through a melting transition ring (2015), a plurality of uniformly distributed snap points (2016) are arranged on the inner side edge of the melting transition ring (2015), the snap points (2016) on the inner edge of the melting transition ring (2015) are used for fixing the high temperature adsorption screen plates (2012), the centers of the high temperature adsorption screen plates (2012) are raised upwards, and the center curvatures of all the high temperature adsorption screen plates (2012) are sequentially increased from bottom to top.
7. The dry type waste heat recovery and dust removal device for converter flue gas according to claim 6, wherein a plurality of salient points (2017) are arranged on the lower surface of the high temperature adsorption screen plate (2012), gaps between adjacent salient points (2017) are used for adsorbing high temperature particles in the flue gas, and a plurality of uniformly distributed air outlets (2018) are arranged on the high temperature adsorption screen plate (2012).
8. The dry type residual heat recovery dust removal device for converter flue gas according to claim 6, wherein the widths of the first baffle plate (11) and the second baffle plate (14) are the same, and the width of the first baffle plate (11) is equal to the sum of the width of the sleeve ring (2011) and the width of the melting transition ring (2012).
9. A dry type waste heat recovery and dust removal method for converter flue gas, which is applied to the dry type waste heat recovery device of any one of claims 1 to 7, is characterized by comprising the following steps:
step 100, arranging a filter screen plate in the recovery dust removal pipeline, wherein the filter screen plate realizes first-order waste heat recovery and dust removal treatment on high-temperature flue gas;
200, enabling the flue gas filtered by the filter screen plate to enter a vacuum heat exchange mechanism, and carrying out heat exchange and cooling treatment on the high-temperature flue gas by the vacuum heat exchange mechanism so as to realize second-order waste heat recovery and dust removal treatment on the high-temperature flue gas;
300, guiding the flue gas subjected to the second-order waste heat recovery and dust removal treatment into a fine dust removal chamber to perform tertiary fine dust removal operation;
and step 400, allowing the flue gas subjected to the three times of fine dust removal to enter a gas collection chamber for collection.
10. The dry type waste heat recovery and dust removal method for the converter flue gas according to claim 9, wherein in the step 100, the specific implementation steps of the filter screen plate for implementing the first-order waste heat recovery and dust removal treatment on the high-temperature flue gas are as follows:
step 101, dividing a filter screen plate into a plurality of flue gas adsorption plates which are stacked up and down, wherein the plurality of flue gas adsorption plates realize multi-layer filtration and waste heat absorption heating of high-temperature flue gas;
102, after each layer of flue gas adsorption plate is heated to a specific temperature, the lowest layer of flue gas adsorption plate is in heat transfer with high-temperature flue gas and then falls off and sinks into a converter so as to recycle the residual heat of the high-temperature flue gas;
and 103, moving the upper smoke adsorption plate downwards to serve as the lowest smoke adsorption plate, and continuously performing dust removal and waste heat absorption operation on the high-temperature smoke.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58170515A (en) * | 1982-03-31 | 1983-10-07 | Hitachi Zosen Corp | Apparatus for collecting dust and recovering heat from converter waste gas |
| JP2001137634A (en) * | 1999-11-12 | 2001-05-22 | Mitsubishi Heavy Ind Ltd | Device and method for treating waste gas |
| JP2014077153A (en) * | 2012-10-09 | 2014-05-01 | Jfe Steel Corp | Skirt sealing device of converter, and method for treating exhaust gas by using the device |
| CN204255115U (en) * | 2014-11-27 | 2015-04-08 | 四川自胜机电设备有限责任公司 | A kind of waste gas of melting furnace purifier |
| CN107308802A (en) * | 2017-08-29 | 2017-11-03 | 郭光跃 | A kind of dust separation device of energy-conserving and environment-protective melt-casting stove |
| CN206666575U (en) * | 2017-03-30 | 2017-11-24 | 河北华奥节能科技有限公司 | A kind of dry-method dust-removal device for reclaiming converter gas waste heat |
| CN109798777A (en) * | 2019-01-09 | 2019-05-24 | 山东阿尔普尔节能装备有限公司 | Flue gas waste heat recovery apparatus |
| CN214361493U (en) * | 2020-11-04 | 2021-10-08 | 中国科学院力学研究所 | Dry type waste heat recovery dust removal device for converter flue gas |
-
2020
- 2020-11-04 CN CN202011215354.XA patent/CN112342337B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58170515A (en) * | 1982-03-31 | 1983-10-07 | Hitachi Zosen Corp | Apparatus for collecting dust and recovering heat from converter waste gas |
| JP2001137634A (en) * | 1999-11-12 | 2001-05-22 | Mitsubishi Heavy Ind Ltd | Device and method for treating waste gas |
| JP2014077153A (en) * | 2012-10-09 | 2014-05-01 | Jfe Steel Corp | Skirt sealing device of converter, and method for treating exhaust gas by using the device |
| CN204255115U (en) * | 2014-11-27 | 2015-04-08 | 四川自胜机电设备有限责任公司 | A kind of waste gas of melting furnace purifier |
| CN206666575U (en) * | 2017-03-30 | 2017-11-24 | 河北华奥节能科技有限公司 | A kind of dry-method dust-removal device for reclaiming converter gas waste heat |
| CN107308802A (en) * | 2017-08-29 | 2017-11-03 | 郭光跃 | A kind of dust separation device of energy-conserving and environment-protective melt-casting stove |
| CN109798777A (en) * | 2019-01-09 | 2019-05-24 | 山东阿尔普尔节能装备有限公司 | Flue gas waste heat recovery apparatus |
| CN214361493U (en) * | 2020-11-04 | 2021-10-08 | 中国科学院力学研究所 | Dry type waste heat recovery dust removal device for converter flue gas |
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| CN112342337B (en) | 2023-09-12 |
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