CN108120293B - Auxiliary sintering blowing device with adjustable gas concentration and control method thereof - Google Patents
Auxiliary sintering blowing device with adjustable gas concentration and control method thereof Download PDFInfo
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- CN108120293B CN108120293B CN201710456386.0A CN201710456386A CN108120293B CN 108120293 B CN108120293 B CN 108120293B CN 201710456386 A CN201710456386 A CN 201710456386A CN 108120293 B CN108120293 B CN 108120293B
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- blowing
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
Abstract
The invention provides a gas concentration adjustable jetting device, which comprises a sintering machine trolley; a blowing cover; the gas injection device comprises a gas injection main pipe, a gas injection branch pipe and a gas injection tube row, the sintering machine trolley is positioned in the sealed cover, the gas injection main pipe is arranged at the outer side of the injection cover, the gas injection tube row is positioned in the injection cover, the gas injection tube row is arranged above the sintering machine trolley, one end of the gas injection branch pipe is connected with the gas injection main pipe, and the other end of the gas injection branch pipe is connected with the gas injection tube row; the air conditioning device comprises an air main pipe, air branch pipes and air pipe rows, wherein the air main pipe is arranged at the outer side of the blowing cover, the air pipe rows are positioned in the blowing cover, the air pipe rows are arranged above the sintering pallet, and one ends of the air branch pipes are connected with the air main pipe and the other ends of the air branch pipes are connected with the air pipe rows; an air regulating valve is arranged on the air branch pipe. The invention also provides a gas concentration adjusting method.
Description
Technical Field
The invention belongs to the technical field of sintering, and particularly relates to a blowing auxiliary sintering device capable of changing gas concentration and a control method thereof.
Background
The sintering process is one key link in iron making process, and is characterized by that various powdered iron-containing raw materials are mixed with proper quantity of fuel and flux, and added with proper quantity of water, and after mixing and pelletizing, the materials are undergone the processes of a series of physical-chemical change on sintering equipment, and sintered into blocks, so that they are fed into blast furnace to implement next process.
In order to reduce the coke ratio and smelting cost of blast furnace ironmaking, the requirements of blast furnace on sinter are often high strength and high reducibility. In the sintering process, sintered ore is generally required to have high strength, high yield, low return rate, and low fuel consumption. The high-strength and high-reducibility sintered ore consumes less coke in the blast furnace smelting process, thereby reducing the emission of carbon dioxide. In the long term, carbon dioxide emission reduction requirement becomes one of the bottlenecks restricting the development of the steel industry. According to the related data, the carbon dioxide emission of the sintering and blast furnace process accounts for about 60% of the total industrial emission. Therefore, reduction of the sintered solid fuel consumption ratio and reduction of the fuel ratio of the blast furnace burden are urgent needs of iron-making technology, both from the viewpoint of cost reduction of enterprises and from the viewpoint of environmental protection.
In such a large environment, the "technology for injecting gas fuel into a sinter level" developed by JFE corporation in japan has been developed, which is based on the principle that gas fuel diluted below the lower limit of the combustible concentration is injected above the sinter level a certain distance after the ignition furnace, so that the gas fuel is burned in the sinter layer to supply heat, thereby reducing the solid carbon consumption and CO in the production of sinter 2 Discharge amount. Meanwhile, the burning of the gas fuel widens the width of a high-temperature zone of the sinter layer during production, so that the temperature time of the sinter at 1200-1400 ℃ is prolonged, and the strength and the 5-10 mm porosity of the sinter are effectively enhanced. At present, the technology has better energy-saving, emission-reducing and quality-improving effects.
Blowing device structure under the prior art: the blowing device consists of a blowing main pipe, a blowing branch pipe, a blowing pipe row, a blowing cover and a side sealing piece. One end of the blowing main pipe is connected with the gas pipeline in the factory, and the other end of the blowing main pipe is connected with the blowing pipe row through the blowing branch pipe, and the blowing pipe row is positioned in the blowing cover and above the sintering machine trolley. When the gas is produced, the gas enters the injection manifold from the gas pipeline in the factory and then enters the injection branch pipe, finally enters the injection pipe row for ejection, is mixed and diluted with air in the injection cover to form mixed gas with the concentration required by design, enters the sinter bed for auxiliary sintering, and the side sealing piece can effectively ensure that the gas and the mixed gas in the cover can not overflow outside the cover.
The coal gas injection auxiliary sintering device in the prior art has the following defects in production:
1. the safety coefficient is not high: because the sintering machine is produced, the air permeability of individual areas of the material surface is often poor due to the factors such as uneven distribution and water addition, so that the areas are presented with a red ore material surface after passing through an ignition furnace, namely, flame ignited by the ignition furnace is not pumped to the lower layer of the material surface by the negative pressure of a bellows, but stays on the material surface. The gas is easy to ignite on the red mineral material surface after being sprayed out from the spraying device, so that an open fire high-temperature area can be formed, the gas tube row is baked at a high temperature for a long time, and once a gas tube is damaged, production accidents can be caused.
2. The auxiliary sintering effect cannot be ensured: once the red ore material surface enters the gas injection device, the injected gas is ignited and burnt outside the material layer, so that the meaning that the gas is pumped into the material layer to be burnt near the combustion zone in the prior art is completely lost, energy is wasted unnecessarily, and the auxiliary effects of auxiliary sintering, energy conservation and emission reduction are completely avoided.
Disclosure of Invention
Aiming at the two defects, the device is optimized and improved on the basis of the structure of the existing injection device, and aims to develop a safe type gas injection auxiliary sintering device which can automatically monitor the working condition of the red ore material surface and eliminate and solve the working condition at the first time, and a control method corresponding to the safe type gas injection auxiliary sintering device so as to achieve the aim of stabilizing and smooth production of the whole production line.
According to a first embodiment of the present invention, there is provided a gas concentration-adjustable injection device comprising
Sintering machine trolley;
the sintering machine trolley is positioned in the blowing cover;
the gas injection device comprises a gas injection main pipe, a gas injection branch pipe and a gas injection tube row, wherein the gas injection main pipe is arranged at the outer side of the injection cover, the gas injection tube row is positioned in the injection cover, the gas injection tube row is arranged above the sintering machine trolley, and one end of the gas injection branch pipe is connected with the gas injection main pipe and the other end of the gas injection branch pipe is connected with the gas injection tube row;
the air conditioning device for dilution comprises an air main pipe, air branch pipes and an air pipe row, wherein the air main pipe is arranged on the outer side of the blowing cover, the air pipe row is positioned in the blowing cover, the air pipe row is arranged above the sintering pallet, and one end of each air branch pipe is connected with the air main pipe, and the other end of each air branch pipe is connected with the air pipe row.
Preferably, the blowing hood and the sintering pallet form a seal.
In the present application, "dilution air" means air for diluting the injected fuel gas.
The invention adds an air conditioning device and an air conditioning valve on the air branch pipe. When the blowing device normally operates, the air regulating valve is in a closed state, and no air enters the air regulating device; when the red mineral material surface with poor air permeability appears on the material surface of the sintering machine trolley, an air regulating valve is opened, air enters an air branch pipe from an air main pipe, and finally is sprayed into the blowing cover from an air pipe row, so that the gas in the blowing cover is diluted rapidly, the concentration of the gas is reduced, the gas is prevented from being ignited on the red mineral material surface, and the adverse effect of open fire high temperature on the device and the whole sintering process is avoided.
In the invention, n (n is 1-10, preferably 2-8, more preferably 3-4) air branch pipes are arranged on the air main pipe, and each air branch pipe is connected with an air pipe row.
Preferably, the air branch pipe is provided with an air regulating valve.
Each air branch pipe is provided with an air regulating valve. The device is provided with a plurality of air branch pipes and is respectively provided with an air regulating valve, one or a plurality of air regulating valves can be selectively opened or closed, the gas concentration in the injection area is accurately regulated, and the gas concentration in the area where the red mineral material surface appears is regulated while the normal material layer sintering is not influenced. The number of the air branch pipes can be set according to the actual production requirement.
Preferably, the air pipe row is arranged above the gas injection pipe row or between the sintering pallet and the gas injection pipe row.
Preferably, the gas injection header pipe and the air header pipe are respectively arranged at two sides of the sintering pallet.
In the invention, the gas injection tube row comprises a plurality of gas injection tubes, and the gas injection tubes are provided with gas injection holes.
In the invention, the air tube row comprises a plurality of air adjusting tubes, and the air adjusting tubes are provided with air adjusting holes.
In the invention, 2-50 gas injection pipes (304), preferably 3-20 gas injection pipes, are arranged or connected on each gas injection pipe row (303).
In the present invention, 2 to 100, preferably 3 to 50 (e.g., 5 to 40, such as 6,8,12,18,20) gas injection holes (305) are provided in each gas injection pipe (304).
In the present invention, 2 to 50, preferably 3 to 20 air-conditioning ducts are provided or connected to each air duct row.
In the present invention, 2 to 100, preferably 3 to 50 (e.g., 5 to 40, such as 6,8,12,18,20) air-conditioning holes are provided in each air-conditioning duct.
Preferably, the air conditioning aperture is vertically downward or diagonally downward; more preferably, the air conditioning hole is provided on a side of the air conditioning duct close to the fuel injection pipe.
The air adjusting hole is arranged on one surface of the air adjusting pipe close to the gas injection pipe, namely when the air pipe row is arranged above the gas injection pipe row, the air adjusting hole is arranged on one downward surface of the air adjusting pipe; and when the air pipe row is arranged between the sintering pallet and the gas injection pipe row, the air adjusting hole is arranged on one upward surface of the air adjusting pipe. The open position of the air adjusting hole is close to the gas injection pipe, and air can be quickly mixed with gas after being injected out, so that the gas concentration is reduced.
In the invention, the injection device with adjustable gas concentration is also provided with an image acquisition device; the image acquisition devices are arranged on the inner wall of the blowing cover, and preferably 1-5, more preferably 2-3 image acquisition devices are arranged. The device is used for detecting the red brightness of the material surface on the sintering machine trolley.
Preferably, the image acquisition device is arranged on the inner wall of the blowing cover along the movement direction of the sintering machine trolley.
More preferably, the image acquisition devices are uniformly arranged at the top of the inner wall of the blowing cover along the moving direction of the sintering machine trolley.
The image acquisition device (such as a high-definition camera) is arranged on the inner wall of the blowing cover and used for monitoring the feeding surface condition of the sintering machine trolley in real time. The image acquisition device starts from one end of the inner wall of the injection cover, which is accessed by the sintering machine trolley, is uniformly arranged along the movement direction of the sintering machine trolley, can monitor the condition of the material surface in the whole sintering process, determines whether to start an air regulating valve to spray air according to the red brightness value of the material surface, solves the problem of red mineral material surface just at the beginning of the sintering process, effectively avoids a series of troubles caused by contact ignition of coal gas and the red mineral material surface, and achieves the purposes of stable production and smooth production.
In the invention, the injection device with adjustable gas concentration is also provided with a control system, and the control system is connected with the image acquisition device and controls the air regulating valve.
According to a second embodiment of the present invention, there is provided a gas concentration adjustment method or a method using the above gas concentration-adjustable blowing device, comprising the steps of:
1) The whole device starts to operate, the gas injection device 3 starts to inject gas, a red brightness set value B is set, an image acquisition device monitors a red brightness detection value C of a feeding surface of a sintering machine trolley in real time, and monitored information is fed back to a control system in real time;
2) The control system compares the detected red brightness detection value C of the feeding surface of the sintering pallet with the red brightness set value B, and if the red brightness detection value C is smaller than the red brightness set value B, the control system continues monitoring;
if the red brightness detection value C is larger than the red brightness set value B, the control system opens an air regulating valve, air is sprayed out from an air regulating hole on the air regulating pipe, and the concentration of the gas is diluted;
3) The image acquisition device continuously monitors, the control system continuously compares, and when the red brightness detection value C is smaller than the red brightness set value B, the control system closes the air regulating valve.
Further, the method of the present invention, wherein step 2) specifically comprises:
a) The red brightness setting value B is divided into m stages, respectively B 1 、B 2 To B m N air branch pipes (n is 1-10, preferably 2-8, more preferably 3-4) corresponding to the device are named as 1 st, 2 nd and n th air branch pipes along the running direction of the sintering pallet; wherein: m=n;
the image acquisition device monitors a red brightness detection value C of the feeding surface of the sintering machine trolley in real time, and feeds back the monitored information to the control system in real time;
b) The control system respectively compares the detected red brightness detection value C of the feeding surface of the sintering pallet with an x-level red brightness set value Bx, wherein x is one of 1-m, namely x is more than or equal to 1 and less than or equal to m:
if the red brightness detection value C is greater than the red brightness set value B x And is smaller than the red brightness set value B x+1 And the red brightness detection value C is smaller than the red brightness set value B m Opening the air regulating valves on the 1 st to the x-th air branch pipes, and spraying air from the air regulating holes on the air regulating pipes to dilute the gas concentration;
if the red brightness detection value C is greater than the red brightness set value B m The gas injection device (3) reduces the gas injection amount or turns off the gas injection device (3) to stop injecting the gas.
The invention can realize the self-adaptive adjustment of the gas concentration in the sintering process through the control system, the image acquisition device and the air regulating valve which are connected with the control system. When the whole device starts to run, the image acquisition system starts to monitor the red brightness detection value C of the feeding surface of the trolley of the junction machine in real time and transmits information to the control system, and the control system controls the control system to control the red brightness detection value C to the set and graded red brightness set value B by the control system 1 To B m The comparison is performed to determine in which range the red luminance detection value C falls, respectively.
When the red brightness detection value C is smaller than the red brightness set value B 1 When the red brightness detection value C is smaller than the lowest red brightness set value set by the system, the material level of the red brightness has little influence on the sintering process, and an air regulating valve is not required to be opened;
when the red brightness detection value C is greater than the red brightness set value B m And is smaller than the red brightness set value B 2 When the gas concentration is diluted, the air regulating valves on the 1 st and the 2 nd air branch pipes are opened, air is sprayed out from the air regulating holes on the air regulating pipes, and the gas concentration is diluted;
accordingly, when the red brightness detection value C is greater than the red brightness set value B 1 And is smaller than the red brightness set value B x+1 Then the air regulating valves on the 1 st to the x-th air branch pipes are opened, and air is discharged from the air regulating pipesThe air adjusting holes are sprayed out to dilute the concentration of the gas.
In the present invention, the red brightness setting value B is divided into m stages, corresponding to the arrangement of n air branch pipes (n is 1-10, preferably 2-8, more preferably 3-4) of the device. Along the running direction of the sintering pallet, n air branch pipes are named as 1 st, 2 nd and n th air branch pipes. In the production process, the need of opening a plurality of air branch pipes to spray air can be determined according to the red brightness classification of the red mineral aggregate surface. The higher the red intensity level, the longer it takes for the red mineral material surface to disappear, and thus the greater the number of gas segments that need to be diluted, the greater the number of air manifolds that need to be turned on. Through classifying the red brightness of the red mineral material surface and corresponding to the opening number of the air branch pipes, the gas concentration of the corresponding area can be effectively diluted, the ignition point of the gas is greatly improved, a series of troubles caused by the contact ignition of the gas and the red mineral material surface can be effectively avoided, and the operation accuracy is higher.
In the present application, the length of the sintering machine (or the running length of the sintering machine carriage) is 70 to 140 meters, preferably 80 to 130 meters, more preferably 90 to 120 meters.
Compared with the prior art, the technology has the following advantages:
1. the safety coefficient is high: the method adopts the mode of monitoring in advance and pre-spraying air to dilute the coal gas, thereby reducing the concentration of the coal gas, effectively avoiding the possibility of ignition after the contact of the coal gas with the red mineral aggregate surface with the excessive concentration, protecting the coal gas pipeline and the whole equipment, and improving the safety coefficient of the whole system production;
2. the device and the method can ensure the auxiliary sintering effect, and can ensure that the auxiliary sintering process of gas injection can be smoothly carried out because the invention effectively avoids the ignition of the sprayed gas outside the material surface and all the gas can be pumped into the material layer to be combusted nearby the combustion zone, thereby achieving the purpose of ensuring the stable and smooth production of the whole production line.
In summary, by using the novel gas concentration-adjustable blowing device and the control method thereof, the defects of the prior art can be effectively overcome, the safety coefficient and the operation rate of the whole device system are improved, and the auxiliary sintering effect is ensured. Compared with the prior art, the method is more reliable, safer and more stable, and can be expected to have great development potential in future markets.
Drawings
FIG. 1 is a schematic diagram of a gas concentration-adjustable blowing device according to the present invention;
FIG. 2 is a schematic diagram of the relationship between the ignition point of gas and the concentration of gas;
FIG. 3 is a schematic top view of a gas injection device of the gas concentration-adjustable injection device of the present invention;
FIG. 4 is a schematic top view of an air conditioning unit of a gas concentration-adjustable injection unit according to the present invention;
FIG. 5 is a schematic diagram of a control system according to the present invention;
FIG. 6 is a flow chart of a method for regulating gas concentration according to the present invention.
Reference numerals: 1-a sintering machine trolley; 2-a blowing hood; 3-a gas injection device; 301-a gas injection header pipe; 302-a fuel gas injection branch pipe; 303-a gas injection tube row; 304-a gas injection pipe; 305-a gas injection hole; 4-an air conditioning device; 401-an air manifold; 402-air branch pipes; 403-air tube rows; 404-air conditioning duct; 405-air conditioning holes; 5-an air-conditioning valve; 6-an image acquisition device; 7-control system.
Detailed Description
According to a first embodiment of the invention, a gas concentration adjustable injection device is provided.
A gas concentration adjustable injection device comprising:
a sintering pallet 1; a blowing cover 2, wherein the sintering pallet 1 is positioned in the blowing cover 2; the gas injection device 3, the gas injection device 3 comprises a gas injection main 301, a gas injection branch pipe 302 and a gas injection pipe row 303, the gas injection main 301 is arranged on the outer side of the injection cover 2, the gas injection pipe row 303 is positioned in the injection cover 2, the gas injection pipe row 303 is arranged above the sintering pallet 1, one end of the gas injection branch pipe 302 is connected with the gas injection main 301, and the other end is connected with the gas injection pipe row 303; air conditioning device 4, air conditioning device 4 includes air header 401, air branch pipe 402, air pipe row 403, and air header 401 sets up in the outside of blowing cover 2, and air pipe row 403 is located in the blowing cover 2 to air pipe row 403 sets up in the top of sintering pallet 1, and air branch pipe 402 one end is connected air header 401 and the other end is connected air pipe row 403.
Preferably, the air manifold 401 is provided with n (n is 1-10, preferably 2-8, more preferably 3-4) air manifolds 402. Each air manifold 402 is connected to an air line 403.
Preferably, the air manifold 402 is provided with an air regulating valve 5.
In the present invention, the air tube row 403 is disposed above the gas injection tube row 303 or between the sintering pallet 1 and the gas injection tube row 303.
Preferably, the gas injection header 301 and the air header 401 are provided on both sides of the sintering pallet 1, respectively.
In the present invention, the gas injection tube row 303 includes a plurality of gas injection tubes 304. The gas injection pipe 304 is provided with a gas injection hole 305.
In the present invention, the air duct row 403 includes a plurality of air conditioning ducts 404. The air conditioning duct 404 is provided with air conditioning holes 405.
In the present invention, 2 to 50, preferably 3 to 20 gas injection pipes 304 are provided or connected to each gas injection pipe row 303.
In the present invention, 2 to 100, preferably 3 to 50, gas injection holes 305 are provided in each gas injection pipe 304.
In the present invention, 2 to 50, preferably 3 to 20 air conditioning ducts 404 are provided or connected to each air duct row 403.
In the present invention, 2 to 100, preferably 3 to 50, air conditioning holes 405 are provided in each air conditioning duct 404.
Preferably, the air conditioning aperture 405 is vertically downward or diagonally downward; more preferably, the air conditioning aperture 405 is disposed on a side of the air conditioning duct 404 that is adjacent to the gas injection duct 304.
Preferably, the device is further provided with an image acquisition device 6. The image acquisition device is arranged on the inner wall of the blowing cover 2. Preferably 1-5, more preferably 2-3 image acquisition means 6 are provided. The image acquisition device 6 is preferably arranged on the inner wall of the blowing hood 2 in the direction of movement of the sintering pallet 1. More preferably, the image acquisition devices 6 are uniformly arranged on the top of the inner wall of the blowing cover 2 along the moving direction of the sintering pallet 1.
Preferably, the device is further provided with a control system 7. The control system 7 is connected to the image pickup device 6 and controls the air-conditioning valve 5.
According to a second embodiment of the present invention, a gas concentration adjustment method is provided.
A gas concentration regulation method comprising the steps of:
1) The whole device starts to operate, the gas injection device 3 starts to inject gas, a red brightness set value B is set, the image acquisition device 6 monitors a red brightness detection value C of the feeding surface of the sintering pallet 1 in real time, and the monitored information is fed back to the control system 7 in real time;
2) The control system 7 compares the detected red brightness detection value C of the feeding surface of the sintering pallet 1 with the red brightness set value B, and if the red brightness detection value C is smaller than the red brightness set value B, the monitoring is continued;
if the red brightness detection value C is larger than the red brightness set value B, the control system 7 opens the air regulating valve 5, air is sprayed out from the air regulating hole 405 on the air regulating pipe 404, and the gas concentration is diluted;
3) The image acquisition device 6 continuously monitors, the control system 7 continuously compares, and when the red brightness detection value C is smaller than the red brightness set value B, the control system 7 closes the air regulating valve 5.
Preferably, the step 2) specifically comprises:
a) The red brightness setting value B is divided into m stages, respectively B 1 、B 2 、……B m N air branch pipes (n is 1-10, preferably 2-8, more preferably 3-4) corresponding to the device are named 1 st, 2 nd, and n th air branch pipes 402 along the running direction of the sintering pallet; wherein: m=n;
the image acquisition device 6 monitors a red brightness detection value C of the feeding surface of the sintering pallet 1 in real time and feeds back the monitored information to the control system 7 in real time;
b) The control system 7 detects the detected red brightness detection value C of the feeding surface of the sintering pallet 1 and the x-level red brightness set value B x The comparison is made respectively, wherein x is a numerical value in 1-m, namely 1.ltoreq.x.ltoreq.m:
if the red brightness detection value C is greater than the red brightness set value B x And is smaller than the red brightness set value B x+1 And the red brightness detection value C is smaller than the red brightness set value B m The air regulating valve 5 on the 1 st to the x-th air branch pipes 402 is opened, air is sprayed out from the air regulating holes 405 on the air regulating pipes 404, and the gas concentration is diluted;
if the red brightness detection value C is greater than the red brightness set value B m The gas injection device 3 reduces the gas injection amount or turns off the gas injection device 3 to stop injecting the gas.
Example 1
As shown in FIGS. 1-5, a gas concentration-adjustable injection device comprises
A sintering pallet 1;
the spraying cover 2, the sintering machine trolley (1) is positioned in the spraying cover (2), and the spraying cover 2 and the sintering machine trolley 1 form a sealing body;
the gas injection device 3, the gas injection device 3 comprises a gas injection main 301, a gas injection branch pipe 302 and a gas injection pipe row 303, the gas injection main 301 is arranged on the outer side of the injection cover 2, the gas injection pipe row 303 is positioned in the injection cover 2, the gas injection pipe row 303 is arranged above the sintering pallet 1, one end of the gas injection branch pipe 302 is connected with the gas injection main 301, and the other end is connected with the gas injection pipe row 303;
the air conditioning device 4, the air conditioning device 4 comprises an air main 401, an air branch pipe 402 and an air pipe row 403, the air main 401 is arranged on the outer side of the blowing cover 2, the air pipe row 403 is positioned in the blowing cover 2, the air pipe row 403 is arranged above the sintering pallet 1, one end of the air branch pipe 402 is connected with the air main 401, and the other end is connected with the air pipe row 403; the air tube row 403 is disposed above the gas injection tube row 303.
The gas injection manifold 301 and the air manifold 401 are provided on both sides of the sintering pallet 1, respectively.
The air manifold 401 is provided with 3 air branch pipes 402, each air branch pipe 402 is connected with an air pipe row 403, and each air branch pipe 402 is provided with an air regulating valve 5.
In this device, 15 gas injection pipes 304 are provided or connected to each gas injection pipe row 303. Each gas injection pipe 304 is provided with 65 gas injection holes 305. Each air tube row 403 is provided with or connected to 15 air conditioning tubes 404. Each air conditioning duct 404 is provided with 65 air conditioning apertures 405. An air conditioning aperture 405 is provided in a face of the air conditioning duct 404 adjacent the gas injection duct 304.
The injection device with adjustable gas concentration is also provided with 2 image acquisition devices 6, wherein the image acquisition devices are arranged on the inner wall of the injection cover 2 and are uniformly arranged on the inner wall of the injection cover 2 along the movement direction of the sintering pallet 1.
The gas concentration adjustable blowing device is also provided with a control system 7, wherein the control system 7 is connected with the image acquisition device 6 and controls the air regulating valve 5.
According to a second embodiment of the present invention, there is provided a gas concentration adjustment method or a method using the above gas concentration-adjustable blowing device, comprising the steps of:
1) The whole device starts to operate, a red brightness set value B is set, an image acquisition device 6 monitors a red brightness detection value C of the feeding surface of the sintering machine trolley 1 in real time, and monitored information is fed back to a control system 7 in real time;
2) The control system 7 compares the detected red brightness detection value C of the feeding surface of the sintering pallet 1 with the red brightness set value B, and if the red brightness detection value C is smaller than the red brightness set value B, the monitoring is continued;
if the red brightness detection value C is larger than the red brightness set value B, the control system 7 opens the air regulating valve 5, air is sprayed out from the air regulating hole 405 on the air regulating pipe 404, and the gas concentration is diluted;
3) The image acquisition device 6 continuously monitors, the control system 7 continuously compares, and when the red brightness detection value C is smaller than the red brightness set value B, the control system 7 closes the air regulating valve 5.
Example 2
As shown in FIGS. 1-6, a gas concentration-adjustable injection device comprises
A sintering pallet 1;
the spraying cover 2, the sintering machine trolley (1) is positioned in the spraying cover (2), and the spraying cover 2 and the sintering machine trolley 1 form a sealing body;
the gas injection device 3, the gas injection device 3 comprises a gas injection main 301, a gas injection branch pipe 302 and a gas injection pipe row 303, the gas injection main 301 is arranged on the outer side of the injection cover 2, the gas injection pipe row 303 is positioned in the injection cover 2, the gas injection pipe row 303 is arranged above the sintering pallet 1, one end of the gas injection branch pipe 302 is connected with the gas injection main 301, and the other end is connected with the gas injection pipe row 303;
the air conditioning device 4, the air conditioning device 4 comprises an air main 401, an air branch pipe 402 and an air pipe row 403, the air main 401 is arranged on the outer side of the blowing cover 2, the air pipe row 403 is positioned in the blowing cover 2, the air pipe row 403 is arranged above the sintering pallet 1, one end of the air branch pipe 402 is connected with the air main 401, and the other end is connected with the air pipe row 403; the air tube row 403 is disposed above the gas injection tube row 303.
The gas injection manifold 301 and the air manifold 401 are provided on both sides of the sintering pallet 1, respectively.
The air manifold 401 is provided with 4 air branch pipes 402, and each air branch pipe 402 is connected with an air pipe row 403.
Each of the air branch pipes 402 is provided with an air regulating valve 5.
In this device, 20 gas injection pipes 304 are provided or connected to each gas injection pipe row 303. Each gas injection pipe 304 is provided with 50 gas injection holes 305. Each air tube row 403 is provided with or connected to 20 air conditioning tubes 404. Each air conditioning duct 404 is provided with 50 air conditioning apertures 405. An air conditioning aperture 405 is provided in a face of the air conditioning duct 404 adjacent the gas injection duct 304.
The injection device with adjustable gas concentration is also provided with 3 image acquisition devices 6, wherein the image acquisition devices are arranged on the inner wall of the injection cover 2 and are uniformly arranged on the top of the inner wall of the injection cover 2 along the movement direction of the sintering pallet 1.
The gas concentration adjustable blowing device is also provided with a control system 7, wherein the control system 7 is connected with the image acquisition device 6 and controls the air regulating valve 5.
A gas concentration regulation method comprising the steps of:
1) The whole device starts to operate, the gas injection device 3 starts to inject gas, the red brightness set value B is set, and the red brightness set value B is divided into 4 stages which are respectively B 1 、B 2 To B 4 Corresponding to the 4 air branch pipes of the device, the 4 air branch pipes 402 are named as 1 st, 2 nd, 3 rd and 4 th air branch pipes 402 along the running direction of the sintering pallet;
the image acquisition device 6 monitors a red brightness detection value C of the feeding surface of the sintering pallet 1 in real time and feeds back the monitored information to the control system 7 in real time;
2) The control system 7 respectively compares the detected red brightness detection value C of the feeding surface of the sintering pallet 1 with the 4-level red brightness set value B, and if the red brightness detection value C is smaller than the red brightness set value B 1 Continuing monitoring;
if the red brightness detection value C is greater than the red brightness set value B 1 And is smaller than the red brightness set value B x (x=1-4), the air regulating valve 5 on the 1 st to (x-1) th air branch pipes 402 is opened, air is ejected from the air regulating hole 405 on the air regulating pipe 404, and the gas concentration is diluted;
if the red brightness detection value C is greater than the red brightness set value B 4 The gas injection device (3) reduces the injection quantity of the gas or the gas injection device (3) is closed to stop injecting the gas;
3) The image acquisition device 6 continuously monitors, the control system 7 continuously compares, and when the red brightness detection value C is smaller than the red brightness set value B 1 When this occurs, the control system 7 closes the air-conditioning valve 5.
Claims (15)
1. An auxiliary sintering blowing method with adjustable gas concentration comprises the following steps:
1) The whole device starts to operate, the gas injection device (3) starts to inject gas, a red brightness set value B is set, the image acquisition device (6) monitors a red brightness detection value C of the feeding surface of the sintering pallet (1) in real time, and monitored information is fed back to the control system (7) in real time;
2) The control system (7) compares the detected red brightness detection value C of the feeding surface of the sintering pallet (1) with the red brightness set value B, and if the red brightness detection value C is smaller than the red brightness set value B, the monitoring is continued;
if the red brightness detection value C is larger than the red brightness set value B, the control system (7) opens the air regulating valve (5), air is sprayed out from the air regulating hole (405) on the air regulating pipe (404), and the gas concentration is diluted;
3) The image acquisition device (6) continuously monitors, the control system (7) continuously compares, and when the red brightness detection value C is smaller than the red brightness set value B, the control system (7) closes the air-conditioning valve (5);
the injection device with adjustable coal gas concentration includes: a sintering pallet (1); a blowing cover (2), wherein the sintering machine trolley (1) is positioned in the blowing cover (2); the gas injection device (3), the gas injection device (3) comprises a gas injection main pipe (301), a gas injection branch pipe (302) and a gas injection pipe row (303), the gas injection main pipe (301) is arranged on the outer side of the injection cover (2), the gas injection pipe row (303) is positioned in the injection cover (2), the gas injection pipe row (303) is arranged above the sintering pallet (1), one end of the gas injection branch pipe (302) is connected with the gas injection main pipe (301) and the other end is connected with the gas injection pipe row (303); an air conditioning device (4) for dilution is arranged, the air conditioning device (4) comprises an air main pipe (401), an air branch pipe (402) and an air pipe row (403), the air main pipe (401) is arranged on the outer side of a blowing cover (2), the air pipe row (403) is positioned in the blowing cover (2), the air pipe row (403) is arranged above a sintering pallet (1), and one end of the air branch pipe (402) is connected with the air main pipe (401) and the other end is connected with the air pipe row (403); the air pipe row (403) comprises a plurality of air adjusting pipes (404), and air adjusting holes (405) are formed in the air adjusting pipes (404); the device is provided with an image acquisition device (6), and the image acquisition device is arranged on the inner wall of the blowing cover (2); the control system (7) is arranged, and the control system (7) is connected with the image acquisition device (6) and controls the air regulating valve (5).
2. The gas concentration-adjustable auxiliary sintering blowing method according to claim 1, wherein: n air branch pipes (402) are arranged on the air main pipe (401), and each air branch pipe (402) is connected with an air pipe row (403); an air regulating valve (5) is arranged on the air branch pipe (402); the step 2) is specifically as follows:
a) The red brightness setting value B is divided into m stages, respectively B 1 、B 2 、……B m N air branch pipes (402) corresponding to the n air branch pipes of the device are named as 1 st, 2 nd and n th air branch pipes (402) along the running direction of the sintering machine trolley; wherein: m=n;
the image acquisition device (6) monitors a red brightness detection value C of the feeding surface of the sintering machine trolley (1) in real time and feeds back the monitored information to the control system (7) in real time;
b) The control system (7) detects the detected red brightness detection value C of the feeding surface of the sintering pallet (1) and the x-level red brightness set value B x The comparisons are made respectively, wherein x is a value from 1 to m, i.e. 1.ltoreq.x.ltoreq.m:
if the red brightness detection value C is greater than the red brightness set value B x And is smaller than the red brightness set value B x+1 And the red brightness detection value C is smaller than the red brightness set value B m Opening the air regulating valve (5) on the 1 st to the x-th air branch pipes (402), and spraying air from the air regulating holes (405) on the air regulating pipes (404) to dilute the gas concentration;
if the red brightness detection value C is greater than the red brightness set value B m The gas injection device (3) reduces the gas injection amount or turns off the gas injection device (3) to stop injecting the gas.
3. The gas concentration-adjustable auxiliary sintering blowing method according to claim 2, characterized in that: n is 1-10.
4. The gas concentration-adjustable auxiliary sintering blowing method according to claim 3, characterized in that: n is 2-8.
5. The gas concentration-adjustable auxiliary sintering blowing method according to claim 3, characterized in that: n is 3-4.
6. The auxiliary sintering blowing method with adjustable gas concentration according to any one of claims 1-5, characterized in that an air pipe row (403) is arranged above the gas blowing pipe row (303) or between the sintering pallet (1) and the gas blowing pipe row (303); and/or
The fuel gas injection header pipe (301) and the air header pipe (401) are respectively arranged at two sides of the sintering pallet (1).
7. The auxiliary sintering blowing method with adjustable gas concentration according to any one of claims 1 to 5, characterized in that the gas blowing pipe row (303) comprises a plurality of gas blowing pipes (304), and the gas blowing pipes (304) are provided with gas blowing holes (305).
8. The auxiliary sintering injection method with adjustable gas concentration according to claim 6, wherein the gas injection tube row (303) comprises a plurality of gas injection tubes (304), and gas injection holes (305) are formed in the gas injection tubes (304).
9. The auxiliary sintering injection method with adjustable gas concentration according to claim 7, wherein 2-50 gas injection pipes (304) are arranged on each gas injection pipe row (303); and/or
2-100 gas injection holes (305) are arranged on each gas injection pipe (304).
10. The auxiliary sintering injection method with adjustable gas concentration according to claim 8, wherein 2-50 gas injection pipes (304) are arranged on each gas injection pipe row (303); and/or
2-100 gas injection holes (305) are arranged on each gas injection pipe (304).
11. The auxiliary sintering blowing method with adjustable gas concentration according to claim 9 or 10, wherein 3-20 gas blowing pipes (304) are arranged on each gas blowing pipe row (303); and/or
Each gas injection pipe (304) is provided with 3-50 gas injection holes (305).
12. The auxiliary sintering blowing method with adjustable gas concentration according to any one of claims 1-5 and 8-10, wherein 2-50 gas blowing pipes (304) are arranged on each air pipe row (403); and/or
2-100 fuel gas injection holes (305) are arranged on each air regulating pipe (404).
13. The auxiliary sintering blowing method with adjustable gas concentration according to claim 12, wherein 3-20 air adjusting pipes (404) are arranged on each air pipe row (403); and/or
Each air conditioning pipe (404) is provided with 3-50 air conditioning holes (405).
14. The auxiliary sintering blowing method with adjustable gas concentration according to any one of claims 1-5, 8-10, 13, characterized in that 1-5 image acquisition devices (6) are provided; the image acquisition device (6) is arranged on the inner wall of the blowing cover (2) along the moving direction of the sintering machine trolley (1).
15. The auxiliary sintering blowing method with adjustable gas concentration according to claim 14, characterized in that 2-3 image acquisition devices (6) are provided; the image acquisition device (6) is uniformly arranged at the top of the inner wall of the blowing cover (2) along the movement direction of the sintering machine trolley (1).
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| CN115218666A (en) * | 2021-11-22 | 2022-10-21 | 中冶长天国际工程有限责任公司 | Method for auxiliary sintering by alternately injecting gas and oxygen |
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