CN218410754U - Built-in concurrent heating hot-blast furnace system of sintering denitration - Google Patents
Built-in concurrent heating hot-blast furnace system of sintering denitration Download PDFInfo
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- CN218410754U CN218410754U CN202221572218.0U CN202221572218U CN218410754U CN 218410754 U CN218410754 U CN 218410754U CN 202221572218 U CN202221572218 U CN 202221572218U CN 218410754 U CN218410754 U CN 218410754U
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Abstract
The utility model provides a built-in concurrent heating hot blast furnace system for sintering denitration, which relates to the technical field of hot blast furnaces and comprises a flue and a built-in hot blast furnace, wherein the built-in hot blast furnace comprises a combustion chamber, a gas pipeline and a combustion-supporting air pipeline which are communicated with the inlet end of the combustion chamber, the outlet end of the combustion chamber is fixedly connected with a nozzle, the nozzle extends into the flue, and fuel and combustion-supporting air are combusted in the combustion chamber to generate high-temperature flue gas which is sprayed into the flue through the nozzle; the built-in hot blast stove is arranged in the flue, flue gas is input from the flue gas inlet end and comes from sintering, the flue gas outlet end is connected with the denitration tower, high-temperature flue gas generated by combustion of fuel and combustion-supporting air in the combustion chamber is sprayed into the flue through the nozzle, the flue gas temperature is improved, coal gas is combusted in the flue to improve the flue gas temperature, equipment is simplified, occupied space is saved, energy consumption is reduced, and efficiency and process economy are improved.
Description
Technical Field
The utility model relates to a hot-blast furnace technical field especially relates to a built-in concurrent heating hot-blast furnace system of sintering denitration.
Background
The control of the emission of NOx in the sintering flue gas is extremely difficult because the emission temperature of the sintering flue gas is mostly about 130-160 ℃, and the working temperature of the existing denitration device used in the power industry is 300-400 ℃, so that the high-temperature (300-400 ℃) denitration process is difficult to be directly used in the sintering industry to control the emission of NOx.
In addition, the low-temperature SCR denitration device is generally located downstream of the desulfurization device because the low-temperature SCR denitration device has the characteristic of high SO2 content of the sintering flue gas, which is generally about 300-2000mg/Nm3, and poisons the low-temperature SCR denitration catalyst to reduce the denitration efficiency of the catalyst. At present, most of sintering flue gas desulfurization processes are wet desulfurization, SDA desulfurization and CFB desulfurization, and the flue gas temperature after desulfurization is about 45-100 ℃, so that the sintering flue gas needs to be subjected to heat supplementing to improve the flue gas temperature for low-temperature SCR denitration, an external hot blast stove occupies a large area, and the cost is higher.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a built-in concurrent heating hot-blast furnace system of sintering denitration through built-in concurrent heating hot-blast furnace, promotes the flue gas temperature at the inside burning coal gas of flue, has simplified equipment, has practiced thrift the occupation of land, has reduced the energy consumption, has improved the economic nature of efficiency and technology, has solved the problem among the prior art.
The utility model discloses a following technical means realizes solving above-mentioned technical problem: a sintering denitration built-in type concurrent heating hot blast stove system comprises a flue and a built-in type hot blast stove, wherein the built-in type hot blast stove comprises a combustion chamber, a gas pipeline and a combustion-supporting air pipeline, the gas pipeline and the combustion-supporting air pipeline are communicated with the inlet end of the combustion chamber, the outlet end of the combustion chamber is fixedly connected with a nozzle, the nozzle extends into the flue, and fuel and combustion-supporting air are combusted in the combustion chamber to generate high-temperature flue gas which is sprayed into the flue through the nozzle.
Preferably, the number of the built-in hot blast stoves is two, and the built-in hot blast stoves are arranged on two sides of the flue gas inlet end.
Preferably, the two nozzles are arranged on two sides of the flue gas inlet end in a staggered manner.
Preferably, a flow guide device is arranged at the downstream position of the built-in hot blast stove and is arranged in the flue.
Preferably, the built-in hot blast stove is a high-speed burner.
Preferably, the nozzle is a high-speed nozzle.
The utility model has the advantages that:
the built-in hot blast stove is arranged in the flue, flue gas is input from the flue gas inlet end and comes from sintering, the flue gas outlet end is connected with the denitration tower, high-temperature flue gas generated by combustion of fuel and combustion-supporting air in the combustion chamber is sprayed into the flue through the nozzle, the flue gas temperature is improved, coal gas is combusted in the flue to improve the flue gas temperature, equipment is simplified, occupied space is saved, energy consumption is reduced, and efficiency and process economy are improved.
Drawings
FIG. 1 is a structural diagram of a sintering denitration built-in type concurrent heating hot blast furnace system of the utility model;
FIG. 2 is a sectional temperature field of a sintering denitration built-in type concurrent heating hot blast furnace system of the utility model;
FIG. 3 is a sectional velocity field of the built-in concurrent heating hot blast stove system for sintering denitration according to the present invention;
FIG. 4 is a sectional pressure field of a sintering denitration built-in type concurrent heating hot blast furnace system of the utility model;
FIG 5 shows the CO mass fraction of the section of the sintering denitration built-in type concurrent heating hot blast stove system.
In the figure: 1. a flue; 2. a flow guide device; 3. a built-in hot blast stove.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Examples
Referring to fig. 1, the sintering denitration built-in type concurrent heating hot blast stove system according to the present embodiment includes a flue 1 and a built-in type hot blast stove 3, where the built-in type hot blast stove 3 includes a combustion chamber, and a fuel gas pipeline and a combustion air pipeline communicated with an inlet end of the combustion chamber, an outlet end of the combustion chamber is fixedly connected with a nozzle, the nozzle extends into the flue 1, and fuel and combustion air are combusted in the combustion chamber to generate high temperature flue gas, which is sprayed into the flue through the nozzle.
The number of the built-in hot blast stoves 3 is two, the built-in hot blast stoves are arranged on two sides of the smoke inlet end of the flue 1, and the two nozzles are arranged on two sides of the smoke inlet end of the flue 1 in a staggered mode, so that disturbance of smoke is increased, hot smoke and sintering smoke are mixed more uniformly and rapidly, and the temperature of the sintering smoke is increased rapidly.
When the fuel gas is burnt, partial flame is leaked into the flue 1 through the nozzle, and the exposed flame can burn CO contained in the sintering flue gas, so that the content of CO in the flue gas is reduced, and the pollution components in the flue gas are reduced.
In order to make hot air in the flue 1 more uniformly distributed and further to raise the temperature of sintering flue gas, a flow guide device 2 is arranged at the downstream position of the built-in hot blast stove 3, namely the flow guide device 2 is close to the flue gas outlet end of the flue 1, and the flow guide device 2 is arranged in the flue 1.
The built-in hot blast stove 3 in the embodiment is a high-speed burner, and the nozzle is a high-speed nozzle.
In the sintering denitration built-in type heat supplementing hot blast stove system, the section temperature field is shown in figure 2, the section velocity field is shown in figure 3, the section pressure field is shown in figure 4, and the section CO mass fraction is shown in figure 5.
In summary, the following steps: the utility model discloses a built-in concurrent heating air heater system for sintering denitration, through set up built-in hot-blast furnace 3 in flue 1, flue 1 flue gas entrance point input flue gas, the flue gas comes from the sintering, flue 1 flue gas exit end is connected with the denitration tower, fuel and combustion-supporting air produce the high temperature flue gas in the combustion chamber burning and spout into the flue through the nozzle, improve the flue gas temperature, at 1 inside burning coal gas promotion flue gas temperature in flue, the equipment has been simplified, the occupation of land has been practiced thrift, the energy consumption is reduced, the economic nature of efficiency and technology has been improved.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides a built-in concurrent heating hot-blast furnace system of sintering denitration, includes flue (1) and built-in hot-blast furnace (3), its characterized in that: the built-in hot blast stove (3) comprises a combustion chamber, a gas pipeline and a combustion-supporting air pipeline, wherein the gas pipeline and the combustion-supporting air pipeline are communicated with the inlet end of the combustion chamber, the outlet end of the combustion chamber is fixedly connected with a nozzle, the nozzle extends into the flue (1), and fuel and combustion-supporting air are combusted in the combustion chamber to generate high-temperature flue gas which is sprayed into the flue through the nozzle.
2. The sintering denitration built-in type concurrent heating hot blast stove system according to claim 1, characterized in that: the number of the built-in hot blast stoves (3) is two, and the built-in hot blast stoves are arranged at two sides of the smoke inlet end of the flue (1).
3. The sintering denitration built-in type concurrent heating hot blast stove system according to claim 2, characterized in that: the two nozzles are arranged on two sides of the smoke inlet end of the flue (1) in a staggered manner.
4. The sintering denitration built-in type concurrent heating hot blast stove system according to claim 1, characterized in that: the flow guiding device (2) is arranged at the downstream position of the built-in hot blast stove (3), and the flow guiding device (2) is arranged in the flue (1).
5. The sintering denitration built-in type concurrent heating hot blast furnace system according to any one of claims 1 to 4, wherein: the built-in hot blast stove (3) is a high-speed burner.
6. The sintering denitration built-in type concurrent heating hot blast stove system according to claim 5, characterized in that: the nozzle is a high-speed nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221572218.0U CN218410754U (en) | 2022-06-22 | 2022-06-22 | Built-in concurrent heating hot-blast furnace system of sintering denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221572218.0U CN218410754U (en) | 2022-06-22 | 2022-06-22 | Built-in concurrent heating hot-blast furnace system of sintering denitration |
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| Publication Number | Publication Date |
|---|---|
| CN218410754U true CN218410754U (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221572218.0U Active CN218410754U (en) | 2022-06-22 | 2022-06-22 | Built-in concurrent heating hot-blast furnace system of sintering denitration |
Country Status (1)
| Country | Link |
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| CN (1) | CN218410754U (en) |
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2022
- 2022-06-22 CN CN202221572218.0U patent/CN218410754U/en active Active
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