CN217948179U - Hot-blast furnace and green ball drying device - Google Patents
Hot-blast furnace and green ball drying device Download PDFInfo
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- CN217948179U CN217948179U CN202221875284.5U CN202221875284U CN217948179U CN 217948179 U CN217948179 U CN 217948179U CN 202221875284 U CN202221875284 U CN 202221875284U CN 217948179 U CN217948179 U CN 217948179U
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Abstract
The utility model discloses a hot-blast furnace and green ball drying device, include: the furnace body is internally provided with a furnace chamber, and one end of the furnace chamber is provided with a flue gas outlet; the blast furnace gas burner is arranged on the wall surface of the furnace chamber of the furnace body and is provided with a combustion-supporting air interface and a blast furnace gas interface; the coke oven gas burner is arranged on the wall surface of the furnace chamber of the furnace body, is provided with a combustion-supporting air interface and a coke oven gas interface and is used for generating flames for igniting the blast furnace gas burner; the electronic ignition device is arranged on the furnace body and used for igniting the flame of the coke oven gas burner; and the smoke induced draft fan is arranged at the smoke outlet and used for leading out heat generated by combustion in the furnace chamber. The device has the characteristics of safety, reliability, easy maintenance and strong stability.
Description
Technical Field
The utility model is used for rotary hearth furnace smelting field especially relates to a hot-blast furnace and green ball drying device.
Background
In the technical field of modern rotary hearth furnace smelting, the hot blast stove is used for generating flue gas for drying green pellets, the dried green pellets are conveyed to a rotary hearth furnace through a belt to be heated and combusted, and oxidation-reduction reaction is carried out to generate metallized pellets. The quality of green pellet drying is directly related to the quality of the final finished product metallized pellets, so that the efficient ignition of a rotary hearth furnace hot blast stove becomes a key.
The traditional ignition device and method for the hot blast stove with the rotary hearth furnace are characterized in that a manhole of the furnace door is opened manually, a smoke induced draft fan is used for adjusting negative pressure, two persons are matched on site, a gas butterfly valve is opened manually by one person, the opening degree of the valve is adjusted, another person carries out manual ignition by an ignition rod dipping diesel oil, the ignition device has the defects that the safety coefficient is low, and the hot blast stove is not favorable for heating and burning and can be recovered quickly.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a hot-blast furnace and green ball drying device, have safe and reliable, easy maintenance, the strong characteristics of stability.
The utility model provides a technical scheme that its technical problem adopted is:
in a first aspect, a hot blast stove comprises:
the furnace body is internally provided with a furnace chamber, and one end of the furnace chamber is provided with a flue gas outlet;
the blast furnace gas burner is arranged on the wall surface of the furnace chamber of the furnace body and is provided with a combustion-supporting air interface and a blast furnace gas interface;
the coke oven gas burner is arranged on the wall surface of the furnace chamber of the furnace body, is provided with a combustion-supporting air interface and a coke oven gas interface and is used for generating flames for igniting the blast furnace gas burner;
the electronic ignition device is arranged on the furnace body and used for igniting the flame of the coke oven gas burner;
and the smoke induced draft fan is arranged at the smoke outlet and used for leading out heat generated by combustion in the furnace chamber.
With reference to the first aspect, in certain implementations of the first aspect, the blast furnace gas burner is provided with a combustion air interface and a coke oven gas interface, and the blast furnace gas burner and the coke oven gas burner are integrated into a whole.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, a plurality of the coke oven gas burners and the blast furnace gas burners are disposed on a wall surface of a furnace chamber of the furnace body.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the method further includes:
and the combustion-supporting air pipeline is connected to the combustion-supporting air interface of the blast furnace gas burner and the combustion-supporting air interface of the coke oven gas burner, and combustion-supporting air control valves are arranged at the front end of the combustion-supporting air interface of the blast furnace gas burner and the front end of the combustion-supporting air interface of the coke oven gas burner.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the method further includes:
the blast furnace gas tank is connected to a blast furnace gas interface of the blast furnace gas burner through a blast furnace gas pipeline, and the blast furnace gas pipeline is provided with a blast furnace gas control valve at the front end of the blast furnace gas interface of the blast furnace gas burner.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the method further includes:
the coke oven gas tank is connected to the coke oven gas interface of the coke oven gas burner through a coke oven gas pipeline, and the coke oven gas pipeline is provided with a coke oven gas control valve at the front end of the coke oven gas interface of the coke oven gas burner.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the method further includes:
and the nitrogen tank is connected to the blast furnace gas pipeline through a first nitrogen pipeline and is connected to the coke furnace gas pipeline through a second nitrogen pipeline, and the first nitrogen pipeline and the second nitrogen pipeline are both provided with nitrogen control valves.
The furnace body is provided with a bleeding channel, and a bleeding valve is arranged on the bleeding channel.
With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, a temperature sensor is disposed in the oven cavity, and a pressure sensor is disposed in the oven cavity.
With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, the electronic ignition device is provided with a flame sensor that detects a combustion condition of a flame in real time.
In a second aspect, a green pellet drying apparatus includes:
the stove of any implementation form of the first aspect;
the chain grate machine is provided with a feeding port, a discharging port and a flue gas inlet, and the flue gas induced draft fan leads heat generated by combustion in the hot blast stove to the flue gas inlet.
One of the above technical solutions has at least one of the following advantages or beneficial effects: the technical scheme of the utility model in, it is higher than the high-furnace gas to utilize coke oven gas calorific value, and the ignition point temperature is less than the characteristics of high-furnace gas ignition point temperature, the coke oven gas nozzle flame is lighted earlier, combustion air is injected through the combustion air interface of coke oven gas nozzle promptly, inject coke oven gas through the coke oven gas interface, open electronic ignition, the back of lighting the fire of coke oven gas nozzle, join in marriage air-fuel ratio, after confirming that coke oven gas flame is stable, combustion air is injected through the combustion air interface of high-furnace gas nozzle again, inject high-furnace gas through the high-furnace gas interface, the flame of blast furnace gas nozzle is lighted to the flame that utilizes coke oven gas nozzle, treat and slowly open high-furnace gas after stabilizing again, join in marriage hot-blast furnace air-fuel ratio, according to rotary hearth furnace actual production needs at last, open other high-furnace gas nozzles. The hot blast stove has the characteristics of safety, reliability, easy maintenance and strong stability.
In addition, the coke oven gas burner of the hot blast stove can be set to be normally open fire, the blast furnace gas is production fire, and in addition, the blast furnace gas burner can be closed when the hot blast stove needs heat preservation and is waited for production at ordinary times, and the coke oven gas burner is left, so that the coke oven gas is not easy to extinguish due to high heat value and low ignition point temperature of the coke oven gas. When the production is resumed, the blast furnace gas burner corresponding to the coke oven gas burner is ignited according to the general hot blast stove safety technical operating rules, and then other blast furnace gas burners are started according to the actual production requirements.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the present invention, if there is a description of directions (up, down, left, right, front and back), it is only for convenience of description of the technical solution of the present invention, and it does not indicate or suggest that the indicated technical features must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present invention.
In the utility model, the meaning of a plurality of is one or more, the meaning of a plurality of is more than two, and the meaning of more than two is understood as not including the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is any description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the present invention, unless otherwise explicitly defined, the terms "set", "install", "connect", and the like are to be understood in a broad sense, and for example, may be directly connected or may be indirectly connected through an intermediate medium; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically connected, may be electrically connected or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The technical field can reasonably determine the specific meaning of the words in the utility model by combining the specific content of the technical scheme.
Referring to fig. 1, an embodiment of the present invention provides a hot blast stove, which includes a stove body 100, a blast furnace gas burner 200, a coke oven gas burner 300, an electronic ignition device, and a flue gas induced draft fan 400.
The furnace body 100 is provided with a furnace chamber 101 for generating high-temperature flue gas through combustion in the furnace body by a blast furnace gas burner 200 and a coke oven gas burner 300, and one end of the furnace chamber 101 is provided with a flue gas outlet 102 for discharging the high-temperature flue gas outwards.
The blast furnace gas burner 200 is disposed on a wall surface of the cavity 101 of the furnace body 100, and the blast furnace gas burner 200 is provided with a combustion air port 201 and a blast furnace gas port 202 for introducing combustion air and blast furnace gas into the blast furnace gas burner 200, respectively, and mixing the combustion air and the blast furnace gas and igniting the mixture at an end of the blast furnace gas burner 200.
The coke oven gas burner 300 is arranged on the wall surface of the furnace chamber 101 of the furnace body 100, the coke oven gas burner 300 is provided with a combustion air interface 301 and a coke oven gas interface 302 which are respectively used for introducing combustion air and coke oven gas into the coke oven gas burner 300, and the coke oven gas burner 300 is used for generating flames for igniting the blast furnace gas burner 200.
The electronic ignition device is arranged on the furnace body 100 and is used for igniting the flame of the coke oven gas burner 300. The flue gas induced draft fan 400 is arranged at the flue gas outlet 102 and is used for leading out heat generated by combustion in the furnace chamber 101.
Wherein the coke oven gas pressure is 7-9 kpa, and the heat value is 17000kj/m 3 The ignition temperature is 600-650 ℃; the pressure of the blast furnace gas is 7-9 kpa, and the heat value is 3500kj/m 3 The ignition point temperature is 750-800 ℃.
The technical scheme of the utility model, utilize coke oven gas calorific value ratio high furnace gas, and ignition point temperature is less than the characteristics of blast furnace gas ignition point temperature, 300 flames of coke oven gas nozzle are lighted earlier, combustion air interface 301 through coke oven gas nozzle 300 injects combustion air promptly, inject coke oven gas through coke oven gas interface 302, open electronic ignition, light the back of the fire of coke oven gas nozzle 300, join in marriage air-fuel ratio, after confirming coke oven gas flame stabilization, combustion air is injected into through the combustion air interface 201 of blast furnace gas nozzle 200 again, inject blast furnace gas through blast furnace gas interface 202, utilize the flames of coke oven gas nozzle 300 to light the flames of blast furnace gas nozzle 200, treat to slowly open blast furnace gas after stable again, join in marriage air-fuel ratio, according to rotary hearth furnace actual production needs at last, open other blast furnace gas nozzles 200 of hot-blast furnace. The hot blast stove has the characteristics of safety, reliability, easy maintenance and strong stability.
In addition, the coke oven gas burner 300 of the hot blast stove can be set to be normally open fire, the blast furnace gas is production fire, and in addition, the blast furnace gas burner 200 can be closed when the hot blast stove needs heat preservation and is to be produced at ordinary times, and the coke oven gas burner 300 is left, so that the coke oven gas is not easy to extinguish due to high heat value and low ignition point temperature of the coke oven gas. When the production is resumed, the blast furnace gas burner 200 corresponding to the coke oven gas burner 300 is ignited according to the general hot blast stove safety technical operating regulations, and then other blast furnace gas burners 200 are started according to the actual production requirements.
The blast furnace gas burner 200 and the coke oven gas burner 300 may be independently arranged or integrated into a whole, for example, in some embodiments, referring to fig. 1, the blast furnace gas burner 200 is provided with a combustion air interface 301 and a coke oven gas interface 302, and the blast furnace gas burner 200 and the coke oven gas burner 300 are integrated into a whole, which can respectively introduce coke oven gas and blast furnace gas according to the working process of the hot blast stove.
In some embodiments, referring to fig. 1, the wall of the cavity 101 of the furnace body 100 is provided with a plurality of coke oven gas burners 300 and blast furnace gas burners 200 to ensure that the hot blast stove can output sufficient flue gas through the flue gas outlet 102 to meet the actual production requirements of the rotary hearth furnace.
Referring to fig. 1, the hot blast stove further includes a combustion fan 500, the combustion fan 500 is connected to the combustion air interface 201 of the blast furnace gas burner 200 and the combustion air interface 201 of the coke oven gas burner 300 through a combustion air pipeline, the combustion air pipe forms a plurality of branches and is respectively connected to the combustion air interface 201 of each of the blast furnace gas burner 200 and the coke oven gas burner 300, and the combustion air pipeline is provided with a combustion air control valve at the front end of the combustion air interface 201 of the blast furnace gas burner 200 and at the front end of the combustion air interface 201 of the coke oven gas burner 300. The input amount of the combustion-supporting air is controlled by the combustion-supporting air control valve, and the air-fuel ratio is adjusted along with the input amount of the blast furnace gas and the coke oven gas.
Referring to fig. 1, the hot blast stove further includes a blast furnace gas tank 600, the blast furnace gas tank 600 is used for storing blast furnace gas, the blast furnace gas tank 600 is connected to the blast furnace gas interface 202 of the blast furnace gas burner 200 through a blast furnace gas pipeline, the blast furnace gas pipeline is provided with a blast furnace gas control valve at the front end of the blast furnace gas interface 202 of the blast furnace gas burner 200, and the gas control valve may be a manual valve or an electric control valve and is used for adjusting the gas supply amount of the blast furnace gas burner 200.
Referring to fig. 1, the hot blast stove further includes a coke oven gas tank 700, the coke oven gas tank 700 is used for storing coke oven gas, the coke oven gas tank 700 is connected to the coke oven gas interface 302 of the coke oven gas burner 300 through a coke oven gas pipeline, the coke oven gas pipeline is provided with a coke oven gas control valve at the front end of the coke oven gas interface 302 of the coke oven gas burner 300, and the coke oven gas control valve may adopt a manual valve or an electric control valve and is used for adjusting the gas supply amount of the coke oven gas burner 300.
Referring to fig. 1, the furnace body 100 is provided with a diffusing channel 103, the diffusing channel 103 is provided with a diffusing valve, the hot blast stove further comprises a nitrogen tank 800, the nitrogen tank 800 is connected to a high furnace gas pipeline through a first nitrogen pipeline 801 and connected to a coke oven gas pipeline through a second nitrogen pipeline 802, and the first nitrogen pipeline 801 and the second nitrogen pipeline 802 are both provided with nitrogen control valves. The nitrogen tank 800 is used for purging and diffusing before re-ignition. For example, the coke oven gas or the blast furnace gas is required to be re-ignited when the ignition fails, the coke oven gas pipeline, the blast furnace gas pipeline and the furnace chamber 101 are subjected to nitrogen purging, gas diffusion, trial explosion and the like through a nitrogen tank 800 before ignition, and the operation can be specifically carried out according to the operation rules of the general hot blast furnace ignition safety technology.
In some embodiments, a temperature sensor 104 is arranged in the furnace chamber 101, and a pressure sensor 105 is arranged in the furnace chamber 101, so as to feed back the temperature and the pressure in the furnace chamber 101 in real time, and ensure that the flue gas output of the hot blast stove meets the requirements of green ball drying.
Wherein, the electronic ignition device is provided with a flame sensor for detecting the combustion condition of flame in real time. The combustion condition of flame is detected in real time, the monitored combustion condition is transmitted to the existing hot blast stove control system, the gas supply is automatically cut off when abnormality occurs, and meanwhile, various electric valves, pressure gauges, flowmeters and the like in the integrated system can be connected into the existing hot blast stove control system.
Referring to fig. 1, the embodiment of the present invention further provides a green pellet drying device, including the drying grate and the hot-blast stove 900 in any of the above embodiments, the drying grate 900 is provided with a feeding port, a discharging port and a flue gas inlet, and the flue gas draught fan 400 draws out the heat generated by combustion in the hot-blast stove to the flue gas inlet.
The green pellet drying device can be used for smelting in the rotary hearth furnace, the heat that it produced the hot-blast furnace heating burning is supplied with the drying green pellet of chain grate machine by flue gas draught fan 400 and is used, and the green pellet dried is transported the rotary hearth furnace heating burning through the belt again, carries out redox reaction, generates the metallized pellet.
In the description of the present specification, references to the description of the term "example," "an embodiment," or "some embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (10)
1. A hot blast stove, comprising:
the furnace body is internally provided with a furnace chamber, and one end of the furnace chamber is provided with a flue gas outlet;
the blast furnace gas burner is arranged on the wall surface of the furnace chamber of the furnace body and is provided with a combustion-supporting air interface and a blast furnace gas interface;
the coke oven gas burner is arranged on the wall surface of the furnace chamber of the furnace body, is provided with a combustion-supporting air interface and a coke oven gas interface and is used for generating flames for igniting the blast furnace gas burner;
the electronic ignition device is arranged on the furnace body and used for igniting the flame of the coke oven gas burner;
and the smoke induced draft fan is arranged at the smoke outlet and used for leading out heat generated by combustion in the furnace chamber.
2. The hot blast stove according to claim 1, wherein the blast furnace gas burner is provided with a combustion air port and a coke oven gas port, and the blast furnace gas burner and the coke oven gas burner are integrated into a whole.
3. The hot blast stove according to claim 1, wherein the wall surface of the furnace chamber of the stove body is provided with a plurality of the coke oven gas burners and the blast furnace gas burners.
4. The hot blast stove according to claim 1, further comprising:
and the combustion-supporting air pipeline is connected to the combustion-supporting air interface of the blast furnace gas burner and the combustion-supporting air interface of the coke oven gas burner, and combustion-supporting air control valves are arranged at the front end of the combustion-supporting air interface of the blast furnace gas burner and the front end of the combustion-supporting air interface of the coke oven gas burner.
5. The hot blast stove according to claim 1, further comprising:
the blast furnace gas tank is connected to a blast furnace gas interface of the blast furnace gas burner through a blast furnace gas pipeline, and the blast furnace gas pipeline is provided with a blast furnace gas control valve at the front end of the blast furnace gas interface of the blast furnace gas burner.
6. The hot blast stove according to claim 5, further comprising:
the coke oven gas tank is connected to the coke oven gas interface of the coke oven gas burner through a coke oven gas pipeline, and the coke oven gas pipeline is provided with a coke oven gas control valve at the front end of the coke oven gas interface of the coke oven gas burner.
7. The hot blast stove according to claim 6, further comprising:
a nitrogen tank connected to the blast furnace gas pipeline through a first nitrogen pipeline and connected to the coke oven gas pipeline through a second nitrogen pipeline, wherein the first nitrogen pipeline and the second nitrogen pipeline are both provided with nitrogen control valves,
the furnace body is provided with a bleeding channel, and a bleeding valve is arranged on the bleeding channel.
8. The hot blast stove according to claim 1, wherein a temperature sensor is provided in the furnace chamber, and a pressure sensor is provided in the furnace chamber.
9. The hot blast stove according to claim 1, wherein the electronic ignition device is provided with a flame sensor for detecting the combustion of the flame in real time.
10. The utility model provides a green ball drying device which characterized in that includes:
the stove of any one of claims 1 to 9;
the chain grate machine is provided with a feeding port, a discharging port and a flue gas inlet, and the flue gas induced draft fan leads heat generated by combustion in the hot blast stove to the flue gas inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221875284.5U CN217948179U (en) | 2022-07-15 | 2022-07-15 | Hot-blast furnace and green ball drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221875284.5U CN217948179U (en) | 2022-07-15 | 2022-07-15 | Hot-blast furnace and green ball drying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217948179U true CN217948179U (en) | 2022-12-02 |
Family
ID=84222505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221875284.5U Active CN217948179U (en) | 2022-07-15 | 2022-07-15 | Hot-blast furnace and green ball drying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217948179U (en) |
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2022
- 2022-07-15 CN CN202221875284.5U patent/CN217948179U/en active Active
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