CN112066744A - High-temperature phase change type heat storage device suitable for converter steelmaking dust removal system - Google Patents
High-temperature phase change type heat storage device suitable for converter steelmaking dust removal system Download PDFInfo
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- CN112066744A CN112066744A CN202010834194.0A CN202010834194A CN112066744A CN 112066744 A CN112066744 A CN 112066744A CN 202010834194 A CN202010834194 A CN 202010834194A CN 112066744 A CN112066744 A CN 112066744A
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- heat storage
- box body
- temperature
- flue gas
- temperature phase
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/023—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/007—Systems for reclaiming waste heat including regenerators
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the technical field of heat storage, in particular to a high-temperature phase-change type heat storage device suitable for a converter steelmaking dust removal system. The device includes circular casing and ash bucket, and the casing includes box and well box, be provided with high temperature phase transition heat accumulation core in the well box, it is provided with the high temperature exhanst gas outlet to go up the box, be provided with the high temperature flue gas entry on well box or the ash bucket the high temperature flue gas entry sets up elementary whirlwind separation/air current and equally divides the device, the high temperature flue gas entry is taken and is followed circular casing tangential direction and insert. The cyclone separation and high-temperature phase change heat storage device is organically combined and is used in a dust removal system similar to the dust removal system under the discontinuous production working condition of converter steelmaking, so that the impact of thermal shock on some devices in the dust removal system is effectively avoided, the service life and the stability and reliability of operation are effectively prolonged, and the maintenance and repair workload of equipment is greatly reduced.
Description
Technical Field
The invention relates to the technical field of heat storage, in particular to a high-temperature phase-change type heat storage device suitable for a converter steelmaking dust removal system.
Background
At present, no matter which process system is adopted for primary flue gas purification of the converter, the common characteristics of the process system are that the cooling of high-temperature flue gas is realized, the cooling of the flue gas is realized by absorbing latent heat of vaporization through evaporation of water, and a large amount of steam is consumed for dry (LT) dedusting because of the requirements of the system. Cooling the flue gas by consuming water is an efficient cooling method, but a very energy consuming method. Because the high-temperature flue gas from the evaporative cooling flue is high-grade heat energy, the heat energy carried by the high-temperature flue gas is not recovered, and a large amount of other energy sources are consumed to cool the high-temperature flue gas, a large amount of energy is wasted, and the high-temperature flue gas is also a main reason for generating smoke and rain. For example, under the general design condition, the temperature of the flue gas discharged from the vaporization flue is 800-1000 ℃, and if the temperature of the flue gas is simply reduced to 500 ℃, steam generated by ton steel can reach 20kg, and huge benefit can be generated.
Therefore, the primary dust removal process of the converter is developed towards the direction of the full dry dust removal process, and oxygen blowing smelting is not continuous in the converter steelmaking process, so that the high-temperature dust removal device and the waste heat recovery device are always in the working state of alternately circulating heating and cooling, and the alternating thermal stress of the high-temperature dust removal device and the waste heat recovery device is large. The high-temperature dust removal device and the waste heat recovery device have short service life and large daily maintenance and repair workload under the action of alternating thermal stress, and also have great influence on converter steelmaking production to a certain extent.
The heat storage technology is the best means for solving the problem. The existing converter steelmaking and electric furnace steelmaking dust removal system mainly uses a sensible heat storage mode, and has the following problems: the heat storage capacity is not strong; the temperature is unstable in the heat storage and release processes; the heat accumulator occupies a large area; the service life is not long, etc.
Disclosure of Invention
Based on the problems of the converter one-time full dry dedusting process, the invention provides a high-temperature phase-change type heat storage device suitable for a converter steelmaking dedusting system in order to realize safe, stable and reliable operation of a high-temperature flue gas dedusting device.
The high-temperature phase-change type heat storage device suitable for the converter steelmaking dust removal system comprises a circular shell and an ash hopper, wherein the shell comprises an upper box body and a middle box body, a high-temperature phase-change heat storage core is arranged in the middle box body, the upper box body is positioned at the upper part of the middle box body, which is provided with the high-temperature phase-change heat storage core, and the ash hopper is positioned below the middle box body;
the upper box body is provided with a high-temperature flue gas outlet, the middle box body or the ash bucket is provided with a high-temperature flue gas inlet, the high-temperature flue gas inlet is provided with a primary cyclone separation/airflow uniform distribution device, and the high-temperature flue gas inlet is accessed along the tangential direction of the circular shell;
uniformly distributed air flow cavities are formed in the straight section of the pipe wall at the lower part of the dust-containing flue gas primary cyclone separation/air flow uniform distribution device;
the lower part of the ash bucket is provided with a dust-removing pneumatic conveying transmitter device;
the high-temperature phase change heat storage core is a honeycomb tube bundle, and gaps between the high-temperature phase change heat storage core and the middle box body are high-temperature flue gas flowing channels;
a gas shock wave soot blower is arranged in the upper box body and used for blowing and cleaning high-temperature flue gas flowing through the wall of the channel cavity;
the bottom of the ash bucket is provided with a device for fluidizing, flame-retarding and explosion-proof compressed nitrogen injection;
and a flame-retardant/explosion-proof compressed nitrogen injection device is arranged in a vortex region where the middle box body, the ash bucket and the high-temperature flue gas primary cyclone separation/air flow sharing device are intersected.
According to the high-temperature phase-change type heat storage device suitable for the converter steelmaking dust removal system, the middle box body and the upper box body can be opened so as to facilitate installation, replacement, maintenance and repair of the high-temperature phase-change heat storage core arranged in the middle box body.
According to the high-temperature phase-change type heat storage device suitable for the converter steelmaking dust removal system, the air flow cavity diameter of a diameter-20-30 mm hole is formed in the straight-section pipe wall at the lower part of the primary dust-containing flue gas cyclone separation/air flow equalization device, and the opening ratio is 40-50.
According to the high-temperature phase-change type heat storage device suitable for the converter steelmaking dust removal system, the middle box body is provided with the fixing seat of the high-temperature phase-change heat storage core.
According to the high-temperature phase-change type heat storage device suitable for the converter steelmaking dust removal system, a shell of the high-temperature phase-change heat storage device and the inner wall of an ash hopper are provided with the high-temperature resistant protective layer, and the outer wall of the high-temperature phase-change heat storage device is provided with the heat insulation cotton and the protective plate layer.
According to the high-temperature phase-change type heat storage device suitable for the converter steelmaking dust removal system, internal components such as the shell of the high-temperature phase-change heat storage device, the high-temperature phase-change heat storage core mounting fixing seat, the dust-containing smoke primary cyclone separation/airflow equalization device and the like are made of high-temperature-resistant stainless steel.
Has the advantages that:
1. the high-temperature phase change heat storage material has high heat storage density; the switching time between the high-temperature flue gas and the air in the heat storage chamber can be prolonged, the switching frequency is reduced, the cycle times of the heat storage medium in unit time are reduced, the service life of the heat storage medium is prolonged, and the reliable operation of the whole heat storage system is further guaranteed.
2. The utilization of the phase change heat storage can fully utilize the characteristic that the phase change heat storage works at almost constant temperature near the phase change temperature to reduce the temperature difference of heat extraction and release, and is more favorable for preventing the thermal shock impact of the phase change heat storage medium and the ceramic filter tube of the pulse blowing ceramic filter tube type dust collector.
3. The device can carry out effective primary separation, sedimentation and purification treatment on the high-temperature flue gas, and simultaneously can more quickly absorb and store a large amount of heat in the high-temperature flue gas in a constant temperature state compared with a sensible heat storage device, and can quickly release a large amount of heat stored in the high-temperature flue gas when the temperature of the subsequent flue gas is reduced, thereby maximally reducing the impact influence of thermal shock generated by special working conditions such as converter steelmaking, electric furnace steelmaking and the like.
4. The cyclone separation and high-temperature phase change heat storage device is organically combined and is used in a dust removal system similar to the dust removal system under the discontinuous production working condition of converter steelmaking, so that the impact of thermal shock on some devices in the dust removal system is effectively avoided, the service life and the stability and reliability of operation are effectively prolonged, and the maintenance and repair workload of equipment is greatly reduced.
Drawings
FIG. 1 is a schematic view of a high-temperature phase-change type heat storage device suitable for converter steelmaking and electric furnace steelmaking dust removal systems according to the present invention;
FIG. 2 is a cross-sectional view of a high-temperature phase-change type heat storage device suitable for a converter steelmaking and electric furnace steelmaking dust removal system according to the present invention.
Reference numeral 1: a high-temperature flue gas outlet; an upper box body 2; 4: a circular housing; 5: a high temperature phase change heat storage core; 8: a middle box body; 9: an ash hopper; 12: a compressed nitrogen gas blowing device; 15: a high temperature flue gas inlet; 16: the dust-containing flue gas primary cyclone separation/gas flow equipartition device; 17: a fixing seat is arranged on the high-temperature phase change heat storage core; 18: pipe bundle and clearance channel for high-temperature flue gas to flow through
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. 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 application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the high-temperature phase-change type heat storage device suitable for a converter steelmaking dust removal system according to the present invention comprises a circular housing 4 and an ash bucket 9, wherein the housing comprises an upper box body 2 and a middle box body 8, a high-temperature phase-change heat storage core 5 is arranged in the middle box body 8, and the upper box body 2 is located at the upper part of the high-temperature phase-change heat storage core 5 in the middle box body 8; the middle box body 8 and the upper box body 2 can be opened so as to facilitate the installation, replacement, maintenance and repair of the high-temperature phase change heat storage core 5 arranged in the middle box body; the ash hopper 9 is positioned below the middle box body 8;
the upper box body 2 is provided with a high-temperature flue gas outlet 1, the middle box body 8 or the ash bucket 9 is provided with a high-temperature flue gas inlet 15, the high-temperature flue gas inlet 15 is connected along the tangential direction of the circular shell, and is used for carrying out primary separation and settlement treatment on high-temperature dusty flue gas entering the dust remover together with a primary cyclone separation/airflow distribution device 16 for dusty flue gas arranged in the middle box body 8 or the ash bucket 9;
the straight pipe wall at the lower part of the dust-containing flue gas primary cyclone separation/airflow equipartition device 16 is provided with an airflow cavity (diameter 20-30mm hole) with the aperture ratio of 40-50%;
the lower part of the ash bucket 9 is provided with a pneumatic conveying and transmitting device for dedusting ash;
a honeycomb-shaped high-temperature phase change heat storage core is arranged in the middle box body through a high-temperature phase change heat storage core mounting and fixing seat 17; the honeycomb-shaped tube bundle of the high-temperature phase-change heat storage core and the gap between the honeycomb-shaped tube bundle and the middle box body are high-temperature flue gas flowing channels; a gas shock wave soot blower is arranged in the upper box body and is used for blowing and cleaning high-temperature flue gas of a high-temperature phase-change heat storage core fixed in the middle box body through the wall of the channel cavity;
the bottom of the ash bucket is provided with a compressed nitrogen blowing device 12 for fluidization, flame retardance and explosion prevention;
and a compressed nitrogen injection device 12 for flame retardance and explosion prevention is arranged in a vortex area where the middle box body, the ash bucket and the high-temperature flue gas primary cyclone separation/airflow equalization device are intersected.
The shell of the high-temperature phase-change heat storage device and the inner wall of the ash bucket are provided with a high-temperature resistant protective layer, and the outer wall of the shell is provided with a heat insulation cotton layer and a protective plate layer.
The shell of the high-temperature phase-change heat storage device, the high-temperature phase-change heat storage core mounting fixing seat, the dust-containing smoke primary cyclone separation/airflow sharing device and other internal components are made of high-temperature-resistant stainless steel materials.
According to the high-temperature phase-change type heat storage device suitable for the converter steelmaking dust removal system, the phase-change heat storage core is formed by filling phase-change heat storage materials into a honeycomb-shaped high-temperature phase-change heat storage device shell with a plurality of tube bundles, and then vacuumizing the high-temperature phase-change heat storage device through the air exhaust sealing head.
When the converter is in an oxygen blowing smelting working state, the temperature of the passing flue gas is highest, the flue gas volume is largest, the high-temperature flue gas enters the high-temperature phase-change heat storage device along the tangential direction of the box body through an inlet formed in the middle box body or the ash bucket, primary separation and purification are carried out on the high-temperature flue gas through the primary cyclone separation/air flow equal distribution device arranged at the inlet, then the high-temperature flue gas rises in the barrel and flows through the high-temperature phase-change heat storage core arranged in the high-temperature phase-change heat storage device, in a constant high-temperature section (namely 700-850 ℃), the high-temperature phase-change heat storage material filled in the high-temperature heat storage core is subjected to phase change to absorb a large amount of heat of the high-temperature flue gas in time.
When the converter is in a smelting working state without blowing oxygen, the temperature of the smoke passing through the converter is relatively low, the smoke volume is less, a large amount of heat is rapidly released to the smoke passing through the converter when the high-temperature phase change heat storage material is subjected to phase change in a constant high-temperature section (namely 700-850 ℃), the temperature of the passing smoke is increased, and the high-temperature smoke subjected to temperature increase flows out from a high-temperature smoke outlet arranged on a box body at the upper part of the high-temperature phase change heat storage device.
Therefore, the effect of alternating thermal stress of the high-temperature dust removal device and the waste heat recovery device in the dust removal system is avoided, the service lives of the high-temperature dust removal device and the waste heat recovery device are effectively prolonged, the daily maintenance and maintenance workload is reduced to the maximum extent, and the stability and the reliability of converter steelmaking production are ensured.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (6)
1. The high-temperature phase-change type heat storage device is characterized by comprising a circular shell and an ash bucket, wherein the shell comprises an upper box body and a middle box body, a high-temperature phase-change heat storage core is arranged in the middle box body, the upper box body is positioned at the upper part of the middle box body, which is provided with the high-temperature phase-change heat storage core, and the ash bucket is positioned below the middle box body;
the upper box body is provided with a high-temperature flue gas outlet, the middle box body or the ash bucket is provided with a high-temperature flue gas inlet, the high-temperature flue gas inlet is provided with a primary cyclone separation/airflow uniform distribution device, and the high-temperature flue gas inlet is accessed along the tangential direction of the circular shell;
uniformly distributed air flow cavities are formed in the straight section of the pipe wall at the lower part of the dust-containing flue gas primary cyclone separation/air flow uniform distribution device;
the lower part of the ash bucket is provided with a dust-removing pneumatic conveying transmitter device;
the high-temperature phase change heat storage core is a honeycomb tube bundle, and gaps between the high-temperature phase change heat storage core and the middle box body are high-temperature flue gas flowing channels;
a gas shock wave soot blower is arranged in the upper box body and used for blowing and cleaning high-temperature flue gas flowing through the wall of the channel cavity;
the bottom of the ash bucket is provided with a device for fluidizing, flame-retarding and explosion-proof compressed nitrogen injection;
and a flame-retardant/explosion-proof compressed nitrogen injection device is arranged in a vortex region where the middle box body, the ash bucket and the high-temperature flue gas primary cyclone separation/air flow sharing device are intersected.
2. The high-temperature phase-change heat storage device suitable for the converter steelmaking dust removal system as claimed in claim 1, wherein the middle box body and the upper box body are openable.
3. The high-temperature phase-change heat storage device suitable for the converter steelmaking dust removal system as claimed in claim 1, wherein the straight tube wall at the lower part of the primary dust-laden flue gas cyclone separation/gas flow equalization device is provided with a gas flow hole diameter of 20-30mm, and the opening ratio is 40-50.
4. The high-temperature phase-change type heat storage device suitable for the converter steelmaking dust removal system as claimed in claim 1, wherein the middle box body is provided with a fixing seat of the high-temperature phase-change heat storage core.
5. The high-temperature phase-change heat storage device suitable for the converter steelmaking dust removal system as claimed in claim 1, wherein the shell of the high-temperature phase-change heat storage device and the inner wall of the ash hopper are provided with a high-temperature resistant protective layer, and the outer wall is provided with heat insulation cotton and a protective plate layer.
6. The high-temperature phase-change heat storage device suitable for the converter steelmaking dust removal system as claimed in claim 1, wherein the housing of the high-temperature phase-change heat storage device, the high-temperature phase-change heat storage core mounting fixing seat and the primary cyclone separation/airflow separation of the dust-laden flue gas are all made of high-temperature resistant stainless steel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020212116832 | 2020-06-25 | ||
| CN202021211683 | 2020-06-25 |
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| CN112066744A true CN112066744A (en) | 2020-12-11 |
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| CN202010834194.0A Pending CN112066744A (en) | 2020-06-25 | 2020-08-19 | High-temperature phase change type heat storage device suitable for converter steelmaking dust removal system |
| CN202021728157.3U Active CN213396607U (en) | 2020-06-25 | 2020-08-19 | High-temperature phase change type heat storage device suitable for converter steelmaking dust removal system |
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| CN202021728157.3U Active CN213396607U (en) | 2020-06-25 | 2020-08-19 | High-temperature phase change type heat storage device suitable for converter steelmaking dust removal system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701510A (en) * | 2021-06-28 | 2021-11-26 | 四川思达能环保科技有限公司 | Raw material smelting section flue gas treatment device in microcrystalline glass preparation process |
-
2020
- 2020-08-19 CN CN202010834194.0A patent/CN112066744A/en active Pending
- 2020-08-19 CN CN202021728157.3U patent/CN213396607U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701510A (en) * | 2021-06-28 | 2021-11-26 | 四川思达能环保科技有限公司 | Raw material smelting section flue gas treatment device in microcrystalline glass preparation process |
| CN113701510B (en) * | 2021-06-28 | 2024-03-19 | 四川思达能环保科技有限公司 | Raw material smelting section flue gas treatment device in microcrystalline glass preparation technology |
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| CN213396607U (en) | 2021-06-08 |
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