CN113969344A - Proportioning method of gas-steam coupling injection process of sintering machine - Google Patents

Proportioning method of gas-steam coupling injection process of sintering machine Download PDF

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CN113969344A
CN113969344A CN202010715730.5A CN202010715730A CN113969344A CN 113969344 A CN113969344 A CN 113969344A CN 202010715730 A CN202010715730 A CN 202010715730A CN 113969344 A CN113969344 A CN 113969344A
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steam
gas
injection
fuel gas
coupling
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CN113969344B (en
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周浩宇
陈思墨
叶恒棣
王业峰
李谦
刘前
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Zhongye Changtian International Engineering Co Ltd
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Zhongye Changtian International Engineering Co Ltd
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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
    • 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
    • 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
    • F27D19/00—Arrangements of controlling devices
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/162—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel
    • F27D2003/165—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel the fluid being a fuel
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/168—Introducing a fluid jet or current into the charge through a lance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2003/00—Type of treatment of the charge
    • F27M2003/04—Sintering

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
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  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention discloses a proportioning method of a gas-steam coupling injection process of a sintering machine, which is used for the gas-steam coupling sintering machine, and the gas-steam coupling sintering machine comprises the following steps: the gas and steam coupling device is arranged above the sintering trolley and is positioned behind the ignition furnace device along the sintering direction; the gas-steam coupling device comprises a gas-steam coupling and blowing unit; the fuel gas steam proportioning method of the fuel gas steam coupling injection unit comprises the following steps: acquiring parameters of gas temperature of fuel gas and steam; calculating the total gas injection amount and the total steam injection amount, and calculating the flow of correspondingly required gas and steam according to the charge level position, wherein the flow of gas injection adopts an attenuation gradient ratio; the flow of steam injection adopts increasing gradient proportion; mixing the fuel gas and the steam after proportioning, and then spraying and blowing the mixture to the charge level. By calculating the flow of the corresponding fuel gas and the flow of the steam and calculating the structural proportion, less spraying or more spraying is avoided.

Description

Proportioning method of gas-steam coupling injection process of sintering machine
Technical Field
The invention relates to the technical field of sintering, in particular to a proportioning method of a gas-steam coupling injection process of a sintering machine.
Background
Sintering is a main raw material processing technology for iron and steel smelting in China, and more than 75% of blast furnace raw materials come from sintered ores.
At present, an ignition furnace is arranged at the head of a sintering machine, an ignition burner is installed in the ignition furnace, a sintering pallet is installed on the sintering machine in an end-to-end manner, wheels of the sintering pallet are installed on a sintering machine rail, and the sintering pallet runs along the sintering machine rail. The bottom air box is arranged below the sintering machine rail, the upper part of the air box corresponds to the bottom of the trolley, and the lower part of the air box is connected with a large sintering flue. The sintering of the device mainly utilizes the coal powder to burn and generate a large amount of heat, so that the energy consumption is higher and the emission pollution is heavier.
In view of the technical problems, a gas injection and steam injection reinforced sintering technology is provided, and the two technologies are relatively advanced green sintering modification technologies at the present stage.
Specifically, compared with the conventional sintering machine, the gas injection reinforced sintering technology is characterized in that a gas injection cover is additionally arranged on the upper part of a sintering machine trolley behind an ignition furnace, and a gas injection pipe is arranged in the gas injection cover. The gas injection technology is used for replacing part of coke powder added by sintering by injecting gas lower than the lower limit of gas explosion concentration into the surface of a sintering material layer after an ignition furnace, so that the gas enters the sintering material layer from the surface of the material layer and is combusted near the upper part of a combustion zone. The technology can effectively reduce the usage amount of the coke powder and the discharge amount of pollutants in the whole production process. In addition, the technology can also effectively avoid overhigh sintering peak temperature, prolong the high-temperature retention time of sintering and improve the quality of sintered ores.
In addition, in the steam injection sintering technique, a steam injection pipe is provided in an upper portion of a sintering pallet behind an ignition furnace, as compared with a conventional sintering machine. The steam injection technology is to inject steam on the surface of the sintering material layer, so that the steam passes through the upper part of the sintering material layer to be burnt into ore and then contacts with the coke powder in a burning zone to react, and the water gas reaction is utilized to play a role in strengthening the burning of the coke powder, so that the burning is more complete, the burning efficiency and the quality of the sintering ore are improved, and the using amount of the coke powder is reduced.
In view of the advantages of steam and gas, gas and steam may be coupled for use in order to further ensure the sintering effect.
However, when gas and steam are used for injection, in order to avoid less injection or more injection to ensure sintering effect and injection accuracy, the injection metering ratio of the gas and the steam needs to be set.
Therefore, how to provide a proportioning method of a gas-steam coupling injection process to ensure the injection accuracy is a technical problem to be solved urgently in the field.
Disclosure of Invention
In view of this, the present invention provides a proportioning method for a gas-steam coupled injection process to ensure the injection accuracy.
In order to achieve the purpose, the invention provides the following technical scheme:
a proportioning method of a gas-steam coupling injection process of a sintering machine is used for the gas-steam coupling sintering machine, and the gas-steam coupling sintering machine comprises the following steps:
the device comprises a sintering trolley running along a sintering direction and an ignition furnace device arranged above the sintering trolley;
the gas and steam coupling device is arranged above the sintering trolley and is positioned behind the ignition furnace device along the sintering direction;
the gas-steam coupling device comprises a gas-steam coupling and blowing unit;
the fuel gas steam proportioning method of the fuel gas steam coupling injection unit comprises the following steps:
step S1: acquiring gas state parameters of gas and steam;
step S2: calculating the total gas injection amount and the total steam injection amount, and calculating the flow of correspondingly required gas and steam according to the charge level position, wherein the flow of gas injection adopts an attenuation gradient ratio; the flow of steam injection adopts increasing gradient proportion;
step S3: metering and proportioning fuel gas and steam;
step S4: mixing the fuel gas and the steam after the metering and proportioning;
step S5: the fuel gas and steam are blown through the nozzle onto the feeding surface.
Preferably, in the proportioning method, the total amount of gas injection VrThe calculation formula is as follows:
Figure BDA0002598073690000031
in the formula, A is the heat value of the solid fuel; b is the heat value of the fuel gas; mtTo a reduced total amount of solid fuel; k is a solid-gas heat exchange coefficient, and is generally 2.5-4.5; vrThe total amount of gas injection;
total amount of steam injection VzIs 2 to 6 t/h.
Preferably, in the proportioning method, the formula of the gas flow attenuation gradient proportioning is as follows:
Figure BDA0002598073690000032
Qrn＝aQr(n-1)
wherein the ratio a of the injection flow of the gas in the later section to the injection flow of the gas in the former section is 0.7-0.9;
in the formula, QrnThe flow rate of the nth section of fuel gas injection is n ═ 2, 3 and 4 ·; t is trAnd (4) blowing time for each section of gas.
Preferably, in the proportioning method, the formula of the steam flow incremental gradient proportioning is as follows:
Figure BDA0002598073690000033
Qzn＝bQz(n-1)
wherein the ratio b of the steam injection flow of the later section to the steam injection flow of the former section is generally 1.2-1.5;
in the formula, QznThe flow rate of the n-th section of steam injection is n ═ 2, 3 and 4 ·; t is tzThe time for each section of steam injection.
Preferably, in the proportioning method, the gas-steam coupling injection unit includes:
the steam coupling pipeline is connected with the steam main pipeline;
the gas coupling pipeline and the steam coupling pipeline are respectively connected with the corresponding metering and proportioning devices;
the mixing device mixes the fuel gas and the steam which pass through the metering and proportioning device and inputs the mixture into a fuel gas and steam coupling pipeline;
and a mixing nozzle for ejecting the gas mixed by the mixing device.
Preferably, in the proportioning method, the proportioning device includes:
the gas heat value analyzer is arranged on the gas coupling pipeline and used for acquiring a gas heat value, the gas thermometer is used for acquiring a gas temperature, and the gas ball valve and the gas flowmeter are arranged on the gas coupling pipeline;
a steam ball valve and a steam flow meter which are arranged on the steam coupling pipeline, and a steam thermometer for acquiring the steam temperature.
Preferably, in the proportioning method, the gas-steam coupling injection unit includes:
a gas injection unit and a steam injection unit;
the gas injection unit includes: the fuel gas pipeline is sequentially provided with a fuel gas heat value analyzer, a fuel gas thermometer, a fuel gas automatic ball valve, a fuel gas flowmeter and a fuel gas nozzle;
the steam injection unit includes: the steam pipeline is sequentially provided with a steam thermometer, a steam automatic ball valve, a steam flowmeter and a steam nozzle.
According to the technical scheme, waste or less injection is avoided by calculating the corresponding flow of the fuel gas and the flow of the steam and proportioning according to the calculated structure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a first schematic structural diagram of a gas-steam coupled sintering machine disclosed in an embodiment of the invention;
FIG. 2 is a diagram of a first gas-steam coupling gas circuit disclosed in the embodiment of the present invention;
FIG. 3 is a schematic diagram of a second structure of a gas-steam coupled sintering machine disclosed in the embodiment of the invention;
FIG. 4 is a diagram of a second gas-steam coupling gas circuit disclosed in the embodiment of the present invention;
FIG. 5 is a gas injection flow diagram as disclosed in an embodiment of the present invention;
FIG. 6 is a graph of vapor injection flow rates as disclosed in an embodiment of the present invention;
fig. 7 is a flow chart of a proportioning method of the steam injection process disclosed in the embodiment of the invention.
Detailed Description
In view of the above, the core of the present invention is to provide a proportioning method for a gas-steam coupled injection process, so as to ensure the injection accuracy.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 7, the present invention discloses a proportioning method for a gas-steam coupled blowing process of a sintering machine, which is used for a gas-steam coupled sintering machine, wherein the gas-steam coupled sintering machine comprises: a sintering trolley 3 running along the sintering direction and an ignition furnace device arranged above the sintering trolley 3; the gas and steam coupling device 7 is arranged above the sintering trolley 3 and is positioned behind the ignition furnace device along the sintering direction; the gas-steam coupling device 7 comprises a gas-steam coupling and blowing unit; the fuel gas steam proportioning method of the fuel gas steam coupling injection unit comprises the following steps:
step S1: acquiring gas state parameters of gas and steam;
step S2: calculating the total gas injection amount and the total steam injection amount, and calculating the flow of correspondingly required gas and steam according to the charge level position, wherein the flow of gas injection adopts an attenuation gradient ratio; the flow of steam injection adopts increasing gradient proportion;
step S3: metering and proportioning fuel gas and steam;
step S4: mixing the fuel gas and the steam after the metering and proportioning;
step S5: the fuel gas and steam are blown through the nozzle onto the feeding surface.
Specifically, the total gas injection amount and the total steam injection amount can be determined according to the test result, the flow rate required by each section of gas can be calculated according to the attenuation gradient of the gas, and the flow rate required by the corresponding steam can be calculated in the same way. This application is through the flow of the gas that the calculation corresponds and the flow of steam and according to calculating the structure ratio, avoids extravagant or spout less.
In the present application the total amount of gas injection VrThe calculation formula is as follows:
Figure BDA0002598073690000061
in the formula, A is the heat value of the solid fuel; b is the heat value of the fuel gas; mtTo a reduced total amount of solid fuel; k is a solid-gas heat exchange coefficient, and is generally 2.5-4.5; vrThe total amount of gas injection;
total amount of steam injection VzIs 2 to 6 t/h.
Preferably, in the proportioning method, the formula of the gas flow attenuation gradient proportioning is as follows:
Figure BDA0002598073690000062
Qrn＝aQr(n-1)
wherein the ratio a of the injection flow of the gas in the later section to the injection flow of the gas in the former section is 0.7-0.9;
in the formula, QrnThe flow rate of the nth section of fuel gas injection is n ═ 2, 3 and 4 ·; t is trAnd (4) blowing time for each section of gas.
Preferably, in the proportioning method, the formula of the steam flow incremental gradient proportioning is as follows:
Figure BDA0002598073690000063
Qzn＝bQz(n-1)
wherein the ratio b of the steam injection flow of the later section to the steam injection flow of the former section is generally 1.2-1.5;
in the formula, QznThe flow rate of the n-th section of steam injection is n ═ 2, 3 and 4 ·; t is tzThe time for each section of steam injection.
And by combining the steam injection total amount and the steam flow increasing ratio, the specific numerical value of the flow of each section of steam can be calculated so as to facilitate accurate proportioning of the fuel gas and the steam.
The sintering machine of gas steam coupling in this application includes sintering pallet 3 and the ignition furnace device of setting in sintering pallet 3 top of following the operation of sintering direction, and this ignition furnace device includes ignition furnace cover 1 and sets up ignition nozzle 2 in ignition furnace cover 1. Sintering machine trolleys 3 are installed on the sintering machine end to end, wheels of the sintering machine trolleys 3 are installed on the sintering machine rails 6, and the sintering machine trolleys 3 run along the sintering machine rails 6. An air box 4 is arranged below the sintering machine track 6, the upper part of the air box 4 corresponds to the bottom of the sintering machine trolley 3, and the lower part of the air box 4 is connected with a large sintering flue 5. On this basis, the sintering machine in this application still includes the gas steam coupling device that sets up in sintering platform truck 3 top and be located ignition furnace device along the rear of sintering direction, and this gas steam coupling device 7 includes gas steam coupling jetting unit along sintering direction.
As shown in fig. 1 and 2, the present application further provides a gas-steam coupled injection unit, specifically, a steam injection unit and a gas injection unit which are independent of each other are disposed in the same cavity.
Wherein, steam injection unit includes: a steam line, a steam thermometer 021, a steam automatic ball valve 022, a steam flow meter 023 and a steam nozzle 024. The steam pipeline is connected with the steam main pipeline, and the automatic steam ball valve 022 is arranged on the steam pipeline and used for controlling the opening size of the steam pipeline; a steam flow meter 023 is arranged on the steam pipeline and used for monitoring the flow of the steam flowing through so as to calculate whether the required steam flow requirement is met; the steam nozzle 024 is used for ejecting steam passing through the steam automatic ball valve 022, namely, steam injection is realized. Only a specific structure of the steam injection unit is disclosed, and in practice, corresponding structures can be added on the steam pipeline according to different requirements.
The gas injection unit includes: the device comprises a gas pipeline, a gas calorific value analyzer 011, a gas thermometer 012, an automatic gas ball valve 013, a gas flowmeter 014 and a gas nozzle 015. The automatic gas ball valve 013 is arranged on the gas pipeline and used for controlling the size of an opening of the gas pipeline; the gas flow meter 014 is arranged on the gas pipeline and used for monitoring the flow of the flowing gas to calculate whether the required gas flow requirement is met; the gas nozzle 015 is used for ejecting gas passing through the gas automatic ball valve 013, that is, gas injection is realized. Only a specific structure of the gas injection unit is disclosed, and in practice, corresponding structures can be added on the gas pipeline according to different requirements.
Further, as shown in fig. 3 and 4, the gas-steam coupled blowing unit disclosed in the present application includes: the device comprises a steam coupling pipeline, a fuel gas steam coupling pipeline, a metering and proportioning device, a mixing device 02 and a mixing nozzle 03. The steam coupling pipeline is connected with the steam main pipeline and used for providing steam, and the gas coupling pipeline is connected with the gas main pipeline and used for providing gas; the metering proportioning device is connected with the gas coupling pipeline and the steam coupling pipeline to respectively meter gas and steam; the mixing device 02 is connected with the output end of the metering and proportioning device, and is used for mixing the fuel gas and the steam which pass through the metering and proportioning device and inputting the mixture into a fuel gas and steam coupling pipeline; the mixing nozzle 03 ejects the gas mixed by the mixing device 02 into the charge level 04. Can accurate regulation gas and steam ratio through measurement proportioning device for the gas volume and the steam volume of spouting into the sintering material are more accurate, have improved jetting efficiency, have reduced gas and steam consumption and gas escape risk. Because the fuel gas and the steam do not react, the fuel gas and the steam can be mixed and then sprayed out through the same nozzle in the embodiment.
Specifically, the metering and proportioning device comprises a steam thermometer 021 and a steam ball valve 022 in sequence at the upstream and a steam flow meter 023 at the downstream according to the steam flowing direction, and comprises a gas heat value analyzer 011, a gas thermometer 012, a gas ball valve 013 and a gas flow meter 014 in sequence according to the gas flowing direction, and the proportioned steam and gas enter the mixing device 02 to be mixed.
The above-described structure can acquire a fuel gas calorific value through the fuel gas calorific value analyzer 011, a fuel gas temperature through the fuel gas thermometer 012, and a steam temperature through the steam thermometer 021. By adopting the structure, the state parameters of the fuel gas and the steam can be obtained, and the total fuel gas injection amount and the total steam injection amount can be determined according to the parameters, specifically, the total fuel gas injection amount and the total steam injection amount can be determined according to experience.
The mixing device 02 mentioned in this application is a pipeline static mixer.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. A proportioning method of a gas-steam coupling injection process of a sintering machine is characterized by being used for the gas-steam coupling sintering machine, wherein the gas-steam coupling sintering machine comprises the following steps:
the sintering trolley (3) runs along the sintering direction and the ignition furnace device is arranged above the sintering trolley (3);
the gas and steam coupling device is arranged above the sintering trolley (3) and is positioned behind the ignition furnace device along the sintering direction;
the gas-steam coupling device (7) comprises a gas-steam coupling and blowing unit;
the fuel gas steam proportioning method of the fuel gas steam coupling injection unit comprises the following steps:
step S1: acquiring gas state parameters of gas and steam;
step S2: calculating the total gas injection amount and the total steam injection amount, and calculating the flow of correspondingly required gas and steam according to the charge level position, wherein the flow of gas injection adopts an attenuation gradient ratio; the flow of steam injection adopts increasing gradient proportion;
step S3: metering and proportioning fuel gas and steam;
step S4: mixing the fuel gas and the steam after the metering and proportioning;
step S5: the fuel gas and steam are blown through the nozzle onto the feeding surface.
2. The proportioning method of claim 1, wherein the total amount of fuel gas injected Vr is calculated by the following formula:
Figure FDA0002598073680000011
in the formula, A is the heat value of the solid fuel; b is the heat value of the fuel gas; mtTo a reduced total amount of solid fuel; k is a solid-gas heat exchange coefficient, and is generally 2.5-4.5; vrThe total amount of gas injection;
total amount of steam injection VzIs 2 to 6 t/h.
3. The proportioning method of claim 1 wherein the formula of the gas flow decay gradient proportioning is as follows:
Figure FDA0002598073680000012
Qrn＝aQr(n-1)
wherein the ratio a of the injection flow of the gas in the later section to the injection flow of the gas in the former section is 0.7-0.9;
in the formula, QrnThe nth section of gas injection flow rate is n-2, 3 and 4 …; t is trAnd (4) blowing time for each section of gas.
4. The proportioning method of claim 1 wherein the steam flow incremental gradient proportioning formula is as follows:
Figure FDA0002598073680000021
Qzn＝bQz(n-1)
wherein the ratio b of the steam injection flow of the later section to the steam injection flow of the former section is generally 1.2-1.5;
in the formula, QznThe n-th section of steam injection flow is n-2, 3 and 4 …; t is tzThe time for each section of steam injection.
5. The sintering machine according to claim 1, wherein the gas-steam coupled blowing unit comprises:
the steam coupling pipeline is connected with the steam main pipeline;
the gas coupling pipeline and the steam coupling pipeline are respectively connected with the corresponding metering and proportioning devices;
the mixing device (02) is used for mixing the fuel gas and the steam which pass through the metering and proportioning device and inputting the mixture into a fuel gas and steam coupling pipeline;
and a mixing nozzle (03) for ejecting the gas mixed by the mixing device (02).
6. The gas-steam coupled injection unit of claim 5, wherein the metering and proportioning device comprises:
the fuel gas heat value analyzer (011) is arranged on the fuel gas coupling pipeline and used for acquiring fuel gas heat value, the fuel gas thermometer (012) is used for acquiring fuel gas temperature, and the fuel gas ball valve (013) and the fuel gas flowmeter (014) are arranged on the fuel gas coupling pipeline;
a steam ball valve (022) and a steam flowmeter (023) which are arranged on the steam coupling pipeline, and a steam thermometer (021) which obtains the temperature of the steam.
7. The sintering machine according to claim 1, said gas-steam coupled blowing unit (07) comprising:
a gas injection unit and a steam injection unit;
the gas injection unit includes: the fuel gas pipeline is sequentially provided with a fuel gas heat value analyzer (011), a fuel gas thermometer (012), a fuel gas automatic ball valve (013), a fuel gas flowmeter (014) and a fuel gas nozzle (015);
the steam injection unit includes: the steam pipeline is sequentially provided with a steam thermometer (021), a steam automatic ball valve (022), a steam flowmeter (023) and a steam nozzle (024).
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