AU2021103449A4 - Sealed Hot Air Cover Device - Google Patents
Sealed Hot Air Cover Device Download PDFInfo
- Publication number
- AU2021103449A4 AU2021103449A4 AU2021103449A AU2021103449A AU2021103449A4 AU 2021103449 A4 AU2021103449 A4 AU 2021103449A4 AU 2021103449 A AU2021103449 A AU 2021103449A AU 2021103449 A AU2021103449 A AU 2021103449A AU 2021103449 A4 AU2021103449 A4 AU 2021103449A4
- Authority
- AU
- Australia
- Prior art keywords
- flue gas
- hot air
- hood
- gas hood
- sintering
- 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.)
- Ceased
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 124
- 239000003546 flue gas Substances 0.000 claims abstract description 122
- 238000005245 sintering Methods 0.000 claims abstract description 74
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 41
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 30
- 239000001301 oxygen Substances 0.000 claims description 30
- 229910052760 oxygen Inorganic materials 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 5
- 239000011490 mineral wool Substances 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 20
- 230000008569 process Effects 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002013 dioxins Chemical class 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000219 mutagenic Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000378 teratogenic Toxicity 0.000 description 1
- 230000003390 teratogenic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- 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
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/002—Details of the installations, e.g. fume conduits or seals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
- F27B21/02—Sintering grates or tables
-
- 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
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
- F27D15/0206—Cooling with means to convey the charge
- F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
- F27D15/022—Cooling with means to convey the charge comprising a cooling grate grate plates
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/14—Sealings between relatively-stationary surfaces by means of granular or plastic material, or fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
- F16J15/3288—Filamentary structures, e.g. brush seals
-
- 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
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
- F27D15/0206—Cooling with means to convey the charge
- F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
- F27D15/022—Cooling with means to convey the charge comprising a cooling grate grate plates
- F27D2015/0233—Cooling with means to convey the charge comprising a cooling grate grate plates with gas, e.g. air, supply to the grate
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The flue gas hood (1) is installed in the sintering machine using circulating flue gas part,
covering the sintering machine, the flue gas hood (1) is arranged on the top of the circulating
intake pipe (2), the circulating intake pipe (2) is installed on the stop valve (3);An emergency
vent (4) is arranged on both sides of the flue gas hood (1), and an electric valve (5) is installed
on the emergency vent (4); The gap between the flue gas hood (1) before and after the end face
and the sintered material layer (10) bed surface is sealed. The invention can significantly reduce
the leakage of normal temperature air into the flue gas hood, ensure the circulation effect of
sintering flue gas, and improve the uniformity of circulating flue gas in the flue gas hood.
1/2
FIGURES
3
2
5 7 12 12
131
- 6-4
113 139
Sinter oree]-1
Figure I A schematic sectional view of the sealed hot air cover of the invention
Figure 2 Aleftview ofthat seal hotaircoveroftheinvention
Description
1/2
3 2
7 12 12
- 6-4 113 139
Sinter oree]-1
Figure I A schematic sectional view of the sealed hot air cover of the invention 131
Figure 2Aleftview ofthat seal hotaircoveroftheinvention
Sealed Hot Air Cover Device
The invention belongs to the technical field of sintering production in the
metallurgical industry, in particular to a sealed hot air hood device.
The sintering flue gas circulation technology is to extract the flue gas from the
bellows of the main flue gas of the sintering machine, and then mix it with the flue
gas drawn from the sintering cooling machine into the mixer to form mixed hot flue
gas after dust removal, and then send the mixed hot flue gas to the surface of the
material layer of the sintering machine for circulating sintering, so as to achieve
energy saving and emission reduction in the sintering process.
The process theory is to use the physical heat of the hot flue gas of the sintering
machine to replace part of the combustion heat of the solid fuel, so the energy
consumption of sintering process will be significantly reduced. The sintering flue gas
is reprocessed through the sintering material layer, and the harmful substances such as
nitrogen oxides and dioxins are decomposing after high temperature, so the
environmental protection index of the flue gas discharged from the sintering process
will be greatly optimized. In addition, after using sintering flue gas circulation
technology, the temperature of the feed layer is more uniform, and the quality of
sintered minerals is improved to a certain extent.
Compared with traditional sintering process, this sintering flue gas recycling
technology has many advantages. However, in order to make the existing sintering
machine use this technology, it is necessary to add equipment to improve the existing equipment and technology. The scheme and device to ensure that the circulating flue gas does not leak out and reduce the leakage of air at normal temperature are the necessary conditions for the sintering flue gas recycling. The concentration of sulfur dioxide, nitrogen oxides, dioxin and CO in the circulating flue gas is high, especially the highest concentration of CO can reach 20003000ppm. Dioxin pollutants have irreversible carcinogenic, teratogenic and mutagenic toxicity, and CO can cause people to faint or even die. Once the circulating flue gas leaks out, it will do great harm to workers and the environment. At present, the sealing technology of flue gas hood mainly focuses on the sealing of sintering ring cooler and its flue gas hood. CN
203478970 U publishes a sealing device for the head and tail section of a hot air hood
of a sintering machine. There is a sealing cavity on a sintering trolley through bolt
components, sealing angles and baffles. CN 101858693 A publishes a sealing method
of high-temperature flue gas produced by sintering cooling ore. It takes steel wires as
sealing members, sets a plurality of steel wires at the gap between a flue gas hood and
a trolley, and blocks the high-temperature flue gas through a barrier formed by the
steel wires. CN 101762170 A publishes an annular cooler and an annular liquid tank
of a flue gas hood. This patent publishes a flue gas hood liquid seal used between the
flue gas hood and the inner and outer side rails of a trolley. The flue gas hood liquid
seal comprises an inward liquid tank and an outer annular liquid tank respectively
arranged on the inner and outer side rails of the trolley.
Circulating flue gas sintering has requirements on the temperature and oxygen
content of circulating flue gas. Reducing the leakage of normal temperature air can ensure the beneficial effect of sintering flue gas recycling technology. Therefore, a feasible device is needed to ensure the uniform use of circulating flue gas, prevent the leakage of circulating flue gas. SUMMARY
The purpose of the invention is to provide a sealed hot air cover device aiming at
overcoming the shortcomings of the existing devices. It can ensure that the sintering
flue gas does not leak and reduce the leakage of normal temperature air when
circulating to the surface of the sintering machine material layer for hot air sintering,
so as to achieve environmental protection and energy saving.
To achieve this purpose, the invention adopts the following technical scheme:
The invention provide a sealed hot air hood device, which comprises a flue gas
hood on a circulating flue gas part of a sintering machine to cover the sinter machine.
There is a circulating air inlet pipe arranged at the top of the flue gas hood and a stop
valve on the circulating air inlet pipe;
Emergency vents are arranged on both sides of the flue gas hood, and electric
valves are installed on the emergency vents;
Seal the gap between the front and rear end faces of the flue gas hood and the
bed surface of the sintering bed.
Emergency vents are arranged on both sides of the flue gas hood, and electric
valves are installed on the emergency vents;
Seal the gap between the front and rear end faces of the flue gas hood and the
bed surface of the sintering bed.
In the invention, one, two or more circulating air inlet pipes can be arranged on
the top of the flue gas hood, and emergency vents are arranged on both sides of the
flue gas hood. A mode of opening part of circulating flue gas and opening part of emergency vents can be adopted, which is more beneficial to the utilization of circulating flue gas and can increase the oxygen content; Compared with the stop valve, the electric stop valve has more rapid response and is convenient for accident treatment.
Preferably, the number of the circulating air inlet pipes is 1-5.
As a preferred technical scheme, the circulating air inlet pipe is internally
provided with a rectifier.
Preferably, the open of the rectifier expand outward.
Accord to the invention, the rectifier can effectively improve the distribution
uniformity of circulate flue gas in the flue gas hood and accelerate the exhaust
sintering.
Preferably, the sealing is to install sealing brush bars at the gap between the front
and rear end faces of the flue gas hood and the bed surface of the sintering bed, and
the sealing brush bars are connected with the flue gas hood through bolts;
The front face of the flue gas hood is also provided with a sealing brush bar base;
The sealing brush bar base has sealing brush bar.
Preferably, the seal is also liquid sealed by a liquid sealing device.
According to the invention, the liquid seal adopts a high-temperature resistant
liquid sealant, which can withstand the high temperature of 1200°C. It can avoid
collision between the trolley and the smoke hood in the moving process.
Preferably, the sealing brush bars installed at the gap between the front and rear
end faces of the flue gas hood and the surface of the sintering bed are staggered by
four layers.
In the invention, the sealing strips are distributed along the front and back of the
front section of the trolley, and the staggered distribution can reduce the heat
overflow.
Preferably, the sealing brush bars are arranged from front to back.
Preferably, the sealing brush bar is made of glass fiber material with high
temperature resistance above 500°C and wear resistance.
In the invention, the surface temperature of the sintered material layer can reach
above 450°C. The sintered material layer is resistant to temperature of 500 °C, so that
the problem of short-time overhaul is avoided, and the service life of the sealed hot air
cover is longer.
Preferably, pressure gauges are arranged on both sides of the flue gas hood for
monitoring the pressure in the flue gas hood.
Preferably, the number of the pressure gauges is 2-6, preferably 4.
Preferably, an oxygen level meter is arranged in the flue gas hood for monitoring
the oxygen content in the flue gas hood.
Preferably, the number of the oxygen meters is 4-8, preferably 4.
Preferably, the circulating air inlet pipe is wrapped with thermal insulation
materials. The flue gas hood is filled with thermal insulation mineral wool.
In the invention, the functions of the sealing brush bar and the thermal insulation
mineral wool are to reduce the heat loss in the circulation process and ensure the flue
gas circulation effect.
There are stop valves and electric valves on a circulating flue gas inlet pipe and an emergency vent. There are pressure gauges and oxygen meters uniformly distributed on both sides of a flue gas hood. When the pressure inside the flue gas hood is greater than the pressure outside the flue gas hood, close the stop valve on the circulating flue gas inlet pipe and open the electric valve on the emergency vent at the same time, stop the circulating flue gas system and resume normal sintering; When the pressure inside the flue gas hood is lower than the outside pressure, close the electric valve of the emergency vent and open the stop valve on the circulating flue gas inlet pipe to sinter the circulating flue gas. When the oxygen content in the flue gas hood is lower than the set value, you can choose to open parts of (or all) electric valves to ensure the oxygen required for sintering.
The present invention provides a sealed hot air hood device for sintering flue gas
circulation according to the first aspect.
As a preferred technical scheme, the working process of the sealing hot air cover
device comprises the following steps:
In the invention, a sealed hot air cover is installed on the circulating flue gas part
of the existing sintering machine to cover it. Open the circulating flue gas inlet pipe,
the circulating flue gas is introduced, and the pressure in the hot air cover is
monitored online by a pressure gauge and an oxygen level meter to ensure that the
pressure is negative and the oxygen concentration is 18-21%. At the same time, hot air
sintering starts and the sintering trolley moves forward. If the pressure of the pressure
gauge is changed to positive, close the stop valve of the air inlet pipe, open the
electric valve on the corresponding emergency vent and enable the normal sintering mode; If the pressure is normal and the oxygen concentration is lower than 18%, open the electric valve on the corresponding emergency vent, replenish air and continue sintering.
Compared with the prior art, the invention has the following advantages:
1.According to the invention, the normal temperature air leaked into the flue gas
hood can be remarkably reduced, the sintering flue gas circulation effect can be
ensured. The gas uniformity of the circulating flue gas in the flue gas hood can be
improved;
2.According to the invention, the sensible heat of the circulating flue gas can be
effectively utilized, and the latent heat emitted in the sintering process can be utilized,
thereby reducing the fuel consumption in the sintering process;
3. According to the invention, it can prevent the circulating flue gas from leaking
out and ensure the safe operation of the sintering flue gas circulating system.
Fig. 1 is a schematic sectional view of the sealed hot air cover of the present
invention;
Fig. 2 is a left view of that seal hot air cover of the present invention;
Fig. 3 is a top view of that seal hot air cover of the present invention;
Icons: 1. Hot wind cover; 2. Circulating flue gas inlet pipe; 3. Stop valve; 4.
Emergency vent; 5. Electric valve; 6. Sealing brush bar; 7. Thermal insulation wool;
8. Sealing brush bar base; 9. Liquid sealing device; 10. Sintered material layer; 11.
Rectifier; 12. Pressure gauges; 13.Oxygen meters.
In order to further explain the technical means adopted by the present invention
and its effects, the technical scheme of the present invention will be further explained
by specific embodiments with reference to the attached figures, but the present
invention is not limited to the scope of embodiments.
Example 1: Sealed hot air cover device
As shown in Fig. 1 and Fig. 2, the schematic diagram of the sealed hot air hood
device according to the embodiment of the invention, the flue gas hood 1 is installed
at the part where the sintering machine uses circulating flue gas to cover the sintering
machine. The top of that flue gas hood 1 is provide with a plurality of circulating air
inlet pipe 2 which are provided with stop valves 3; The circulating air inlet pipe 2 is
internally provided with a rectifier 11, and the opening of the rectifier 11 is expanded
outwards; Heat preservation material is wrapped on the circulating air inlet pipe 2,
and heat preservation mineral wool is filled in the flue gas hood 1.
Emergency vents 4 are arranged on both sides of the flue gas hood 1, and electric
valves 5 are installed on the emergency vents 4.
Sealing brush bars 6 are installed at the gap between the front and rear end faces
of the flue gas hood 1 and the bed surface of the sintering material layer 10; The front
end face of the flue gas hood is also provided with a sealing brush bar base 8, on
which a sealing brush bar 6 is installed. The sealing brush bar 6 has four staggered
layers from front to back and is made of glass fiber materials with high temperature
resistance above 500 C and wear resistance.
The flue gas hood 1 and the sintering machine are also liquid sealed by a liquid
sealing device 9;
Pressure gauges 12 are arranged on both sides of the flue gas hood 1 for
monitoring the pressure in the flue gas hood 1;
The flue gas hood 1 is internally provided with an oxygen level meter 13 for
monitoring the oxygen content in the flue gas hood 1.
The working process of the sealing hot air cover device comprises the following
steps:
In the invention, a sealed hot air cover 1 is installed on the circulating flue gas
part of the existing sintering machine to cover it. Open the circulating flue gas inlet
pipe 2, the circulating flue gas is introduced, and the pressure in the hot air cover is
monitored online by a pressure gauge 12 and an oxygen level meter 13 to ensure that
the pressure of hot air cover 1 is negative and the oxygen concentration is 18-21%. At
the same time, hot air sintering starts and the sintering trolley moves forward. If the
pressure of the pressure gauge 12 changed to positive, close the stop valve 3 of the air
inlet pipe2, open the electric valve 5 on the corresponding emergency vent 4 and
enable the normal sintering mode; If the pressure of the pressure gauge 12 is normal
and the oxygen concentration is lower than 18%, open the electric valve 5 on the
corresponding emergency vent 4, replenish air and continue sintering.
In the example 1, the sealing brush bar 6 is connected with the flue gas hood 1 by
bolts.
In the example 1, the number of the pressure gauges 12 is four.
In the example 1, the number of the oxygen meters 13 is four.
Example 2:
Using the device described in example 1, the flue gas hood 1 is covered on the
sintering machine for sintering. The specific operation is as follows:
Open the circulating flue gas inlet pipe 2 and introduce the circulating flue gas.
The pressure gauge 12 and oxygen level meter 13 monitor online to ensure that the
pressure in the hot air cover 1 is negative and the oxygen concentration is 20%. At
this time, the hot air sintering starts and the sintering trolley moves forward;
If the pressure of the pressure gauge 12 turns to positive value, close the stop
valve 3 of the circulating flue gas inlet pipe 2, open the electric valve 5 on the
corresponding emergency vent 4, and start the normal sintering mode; If the pressure
of the pressure gauge 12 is normal and the oxygen concentration is 15%, open the
electric valve 5 on the corresponding emergency vent 4, replenish air and continue hot
air sintering.
The sealed hot air cover device ensures that the oxygen concentration in the hot
air cover is 18-21%.
Control Group:
The embodiment published in CN 202648404 U is taken as a control example.
The oxygen concentration in the hot air cover is 6- 1 0 %.
By comparing the examples with the control examples, it can be clearly seen that
the oxygen partial pressure of the sealed hot air device in the sintering process of the
invention is higher, which ensures the amount of oxygen required for sintering. In addition, the circulating flue gas in the present invention enters the process of circulating from above and flows out from both sides, so that the distribution of circulating flue gas is more uniform. In the control example, the circulating flue gas inlet pipe and emergency vent are assembled on one pipe. This is not only unfavorable to the circulating process of circulating flue gas, but also is uneven in gas distribution and insufficient in oxygen partial pressure, which is unfavorable to sintering.
To draw a conclusion, the invention can significantly reduce the normal
temperature air leaking into the flue gas hood, ensure the sintering flue gas circulation
effect, and improve the gas uniformity of the circulating flue gas in the flue gas hood;
According to the invention, the sensible heat of the circulating flue gas can be
effectively utilized, and the latent heat emitted in the sintering process can be utilized,
thereby reducing the fuel consumption in the sintering process.
The applicant declares that the detailed method of the present invention is
illustrated by the above examples, but the present invention is not limited to the above
detailed method, that is. It does not mean that the present invention can be
implemented only by relying on the above detailed method. It should be clear to those
skilled in the art that any improvement to the invention, equivalent replacement of
raw materials, addition of auxiliary components, selection of specific modes, etc., fall
within the scope of protection and disclosure of the present invention.
Claims (10)
1.The invention relates to a sealed hot air hood device, which comprises a flue
gas hood (1) arranged at the part of a sintering machine which uses circulating flue
gas to cover the sintering machine; It is characterized in that a circulating air inlet
pipe (2) is arranged at the top of the flue gas hood (1), and a stop valve (3) is arranged
on the circulating air inlet pipe (2);
Sealing the gap between the front and rear end faces of the flue gas hood (1) and
the bed surface of the sintering material layer (10);
The sealing is to install a sealing brush bar (6) at the gap between the front and
rear end faces of the flue gas hood (1) and the surface of the sintering material layer
(10);
The front end face of the flue gas hood (1) is also provided with a sealing brush
bar base (8), which is provided with sealing brush bars (6); The sealing brush bars (6)
installed at the gap between the front and rear end faces of the flue gas hood (1) and
the bed surface of the sintering material layer (10) have four staggered layers;
Two pressure gauges (12) are arranged on both sides of the flue gas hood (1) for
monitoring the pressure in the flue gas hood (1); The number of the pressure gauges
(12) is 2-4;
The flue gas hood (1) is internally provided with oxygen level meters (13) for
monitoring the oxygen content in the flue gas hood (1), and the number of the oxygen
level meters (13) is 4-8.
2.According to claim 1, the sealed hot air hood device is characterized in that the
number of the circulating air inlet pipes (2) is 1-5.
3. According to claim 1, the sealed hot air hood device is characterized in that the
sealing brush bar (6) is connected with the flue gas hood (1) by bolts.
4.According to claim 1, the sealed hot air hood device is characterized in that the
sealing is also liquid sealed by a liquid sealing device (9).
5.According to claim 1, the sealed hot air hood device is characterized in that the
sealing brush bars (6) are arranged from front to back.
6. According to claim 1, the sealed hot air hood device is characterized in that the
sealing brush bar (6) is made of glass fiber material with high temperature resistance
above 500°C and wear resistance.
7. According to claim 1, the sealed hot air hood device is characterized in that the
number of the pressure gauges (12) is four.
8. According to claim 1, the sealed hot air hood device is characterized in that the
number of the oxygen level meters (13) is four.
9. According to claim 1, the sealed hot air hood device is characterized in that the
circulating air inlet pipe (2) is wrapped with thermal insulation material, and the flue
gas hood (1) is filled with thermal insulation mineral wool.
10. A sealed hot air hood device according to claim 1-9, which is used for
sintering flue gas circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021103449A AU2021103449A4 (en) | 2021-06-18 | 2021-06-18 | Sealed Hot Air Cover Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021103449A AU2021103449A4 (en) | 2021-06-18 | 2021-06-18 | Sealed Hot Air Cover Device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021103449A4 true AU2021103449A4 (en) | 2021-08-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021103449A Ceased AU2021103449A4 (en) | 2021-06-18 | 2021-06-18 | Sealed Hot Air Cover Device |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2021103449A4 (en) |
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2021
- 2021-06-18 AU AU2021103449A patent/AU2021103449A4/en not_active Ceased
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| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |