An energy-saving blast furnace gas temperature regulating device

Abstract

This invention provides an energy-saving blast furnace gas temperature regulation device, applied at the blast furnace gas outlet. It includes a gravity dust collector, a radiator, a dust collection bag, and a turbine. The gravity dust collector is connected at one end to the blast furnace gas outlet and at the other end to the radiator, used for preliminary removal of large particulate impurities from the blast furnace gas. The radiator is connected at one end to the gravity dust collector and at the other end to the dust collection bag, used to control the temperature of the blast furnace gas and prevent damage to the dust collection bag. The dust collection bag is connected at one end to the radiator and at the other end to the turbine, used to remove impurities from the blast furnace gas, completing the purification process. The turbine, connected to the dust collection bag, converts the pressure and thermal energy of the blast furnace gas into rotational mechanical energy to drive a generator. This invention effectively regulates the temperature of the blast furnace gas, simultaneously treating the gas and enabling its recycling.

Description

Technical Field

[0001] This invention relates to the field of heat recycling technology, and in particular to an energy-saving blast furnace gas temperature regulation device. Background Technology

[0002] During the blast furnace smelting process, steel enterprises generate a large amount of blast furnace gas (approximately 1750–2000 m³). 3 / ton of iron). Blast furnace gas, as a combustible gas, can provide combustion and heating for multiple processes within steel enterprises. Due to the nature of blast furnace smelting, the gas exiting from the furnace top contains a large amount of dust and has high pressure, making it unsuitable for direct use by downstream users. The blast furnace gas needs to undergo dust removal and pressure reduction before being delivered to users. Currently, most blast furnace gas dust removal and pressure reduction processes employ dry baghouse dust collection + TRT (Transmission Time Reduction) technology. Because the dust collection bags have specific operating temperature requirements, the temperature of the blast furnace gas needs to be controlled within a certain range (approximately 80-220 degrees Celsius).

[0003] The heat resistance temperature of dust collector bags is approximately 220 degrees Celsius. When the temperature of blast furnace gas exceeds 220 degrees Celsius, the dust collector bags face the risk of high-temperature burn-out. Damage to the dust collector bags will affect the blast furnace gas purification process and the operation of the downstream TRT turbine and blast furnace gas users. Therefore, when the temperature of the blast furnace gas exceeds the stable operating range of the dust collector bags, temperature regulation and control are necessary. Currently, most steel companies have multiple sets of heat dissipation and cooling devices (hereinafter referred to as radiators) to cope with different high-temperature conditions. However, when the blast furnace gas temperature is within the stable operating range of the dust collector bags, some radiators cannot be deactivated, resulting in blast furnace gas temperature loss, reduced TRT power generation efficiency, and low economic efficiency.

[0004] Therefore, there is a need to provide a blast furnace gas temperature regulation device to prevent dust collector bags from burning and to avoid blast furnace gas temperature loss. Summary of the Invention

[0005] To address the aforementioned technical problems, an energy-saving blast furnace gas temperature regulation device is provided. This invention is primarily applied at the blast furnace gas exhaust port and includes a gravity dust collector, a radiator, dust collection bags, and a turbine, effectively regulating the blast furnace gas temperature. When the blast furnace gas temperature exceeds its upper limit, cooling regulation is implemented to prevent the dust collection bags from burning out due to high temperatures. When the blast furnace gas temperature is within the stable operating temperature range of the dust collection bags, heat preservation regulation is implemented to significantly minimize gas temperature loss and increase the power generation of the downstream TRT (Transmission Reduction Unit).

[0006] The technical means employed in this invention are as follows:

[0007] An energy-saving blast furnace gas temperature regulation device, applied at the blast furnace gas exhaust port, includes: a gravity dust collector, a radiator, dust collection bags, and a turbine, wherein:

[0008] The gravity dust collector is connected to the gas outlet of the blast furnace at one end and to the radiator at the other end, and is used to initially remove large particulate impurities from the blast furnace gas.

[0009] One end of the radiator is connected to a gravity dust collector, and the other end is connected to a dust collection bag, which is used to control the temperature of the blast furnace gas and prevent the dust collection bag from burning.

[0010] The dust collector bag is connected to a radiator at one end and a turbine at the other end, and is used to remove impurities from the blast furnace gas to complete the purification process.

[0011] The turbine is connected to a dust collector bag and is used to convert the pressure energy and thermal energy of the blast furnace gas into mechanical energy, which in turn drives the generator to do work.

[0012] Furthermore, the radiator is also equipped with a regulator, an adjustment grille, and a temperature sensor, wherein:

[0013] The regulator is connected to a temperature sensor at one end and an adjustment grille at the other end, and is used to control the working state of the radiator by controlling the angle of the adjustment grille.

[0014] The grids in the regulating grid are connected by hinges;

[0015] The temperature sensor is used to monitor the temperature of blast furnace gas in real time and send the data to the regulator.

[0016] Furthermore, an insulation layer is provided on the outside of the regulating grille.

[0017] Furthermore, the working states of the radiator include a low-temperature gas insulation state and a high-temperature gas heat dissipation state. When the temperature of the blast furnace gas is within the range that the dust collector bag can withstand, it switches to the low-temperature gas insulation state; when the temperature of the blast furnace gas is unbearable for the dust collector bag, it switches to the high-temperature gas heat dissipation state.

[0018] Furthermore, the regulator has an external power supply.

[0019] Furthermore, the output end of the turbine is connected to a hot blast stove or a blast furnace gas main pipeline.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The energy-saving blast furnace gas temperature regulation device provided by this invention can effectively regulate the temperature of blast furnace gas. When the blast furnace gas temperature exceeds the upper limit, cooling regulation is performed to avoid high-temperature burnout of the dust collector bags; when the blast furnace gas temperature is within the stable operating temperature range of the dust collector bags, heat preservation regulation is performed to greatly avoid gas temperature loss, increase the power generation of the downstream TRT, and improve economic benefits.

[0022] Based on the above reasons, this invention can be widely promoted in fields such as heat recycling. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the energy-saving blast furnace gas temperature regulation device of the present invention.

[0025] Figure 2 This is a schematic diagram of the heat sink structure in this invention.

[0026] Figure 3 This is a schematic diagram of the low-temperature heat preservation state and the high-temperature heat dissipation state of the gas in this invention.

[0027] In the diagram: 1. Gravity dust collector; 2. Radiator; 3. Dust collector bag; 4. Turbine; 5. Regulator; 6. Adjustable grid; 7. Temperature sensor. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0033] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0035] like Figure 1 As shown, this invention provides an energy-saving blast furnace gas temperature regulation device, applied at the blast furnace gas exhaust port, comprising: a gravity dust collector 1, a radiator 2, a dust collector bag 3, and a turbine 4, wherein:

[0036] The gravity dust collector 1 is connected to the gas outlet of the blast furnace at one end and to the radiator 2 at the other end, and is used to initially remove large particulate impurities in the blast furnace gas.

[0037] The radiator 2 is connected to the gravity dust collector 1 at one end and the dust collector bag 3 at the other end, which is used to control the temperature of the blast furnace gas and prevent the dust collector bag from burning.

[0038] The dust collector bag 3 is connected to the radiator 2 at one end and the turbine 4 at the other end, and is used to remove impurities from the blast furnace gas to complete the purification process.

[0039] The turbine 4 is connected to the dust collector bag 3, which is used to convert the pressure energy and thermal energy of the blast furnace gas into rotational mechanical energy and drive the generator to do work.

[0040] In a specific implementation, as a preferred embodiment of the present invention, the radiator 2 is further equipped with a regulator 5, an adjustment grille 6, and a temperature sensor 7, wherein:

[0041] The regulator 5 is connected to the temperature sensor 7 at one end and the regulating grille 6 at the other end, and is used to control the working state of the radiator by controlling the angle of the regulating grille 6.

[0042] The grids in the adjusting grid 6 are connected by hinges;

[0043] The temperature sensor 7 is used to monitor the temperature of the blast furnace gas in real time and send the data to the regulator 5.

[0044] In a preferred embodiment of the present invention, the adjusting grille 6 is provided with an insulation layer on its exterior.

[0045] In specific implementation, as a preferred embodiment of the present invention, the working state of the radiator includes a low-temperature gas insulation state and a high-temperature gas heat dissipation state. When the temperature of the blast furnace gas is within the range that the dust collector bag 3 can withstand, the radiator switches to the low-temperature gas insulation state; when the temperature of the blast furnace gas is unbearable for the dust collector bag 3, the radiator switches to the high-temperature gas heat dissipation state.

[0046] In a specific implementation, as a preferred embodiment of the present invention, the regulator 5 is equipped with an external power supply.

[0047] In a specific implementation, as a preferred embodiment of the present invention, the output end of the turbine 4 is connected to a hot blast stove or a blast furnace gas main pipeline to recycle the blast furnace gas.

[0048] Example

[0049] The regulator is installed at the bottom of the radiator and connected to the nearest regulating grille via a crank arm and hinge; the regulating grille is installed on the upper and lower housings of the radiator, and the grilles are connected to each other via hinges; to reduce heat radiation loss, an insulation layer is installed on the outside of the regulating grille.

[0050] The system works as follows:

[0051] 1. When the blast furnace gas temperature is within the stable operating temperature range of the dust collector bags (the temperature setpoint can be adjusted according to specific circumstances), the regulating grid should be closed. Figure 3 The gas is kept in a low-temperature insulation state. This reduces heat loss caused by thermal radiation and air convection.

[0052] 2. When the blast furnace gas temperature exceeds the stable operating temperature range of the dust collector bags (the temperature setpoint can be adjusted according to specific circumstances), the regulating grid opens linearly, such as... Figure 3 The diagram illustrates the high-temperature heat dissipation of coal gas. The high-temperature coal gas dissipates heat through thermal radiation and air convection.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An energy-saving blast furnace gas temperature regulating device, applied at the blast furnace gas exhaust port, characterized in that, include: The components include a gravity dust collector (1), a radiator (2), a dust collector bag (3), and a turbine (4), wherein: The gravity dust collector (1) is connected to the gas outlet of the blast furnace at one end and to the radiator (2) at the other end, and is used to initially remove large particulate impurities in the blast furnace gas. The radiator (2) is connected to a gravity dust collector (1) at one end and a dust collector bag (3) at the other end, which is used to control the temperature of the blast furnace gas and prevent the dust collector bag from burning. The dust collector bag (3) is connected to the radiator (2) at one end and to the turbine (4) at the other end, and is used to remove impurities from the blast furnace gas to complete the purification process. The turbine (4) is connected to the dust collector bag (3) to convert the pressure energy and thermal energy of the blast furnace gas into mechanical energy and drive the generator to do work.

2. The energy-saving blast furnace gas temperature regulating device according to claim 1, characterized in that, The radiator (2) is also equipped with a regulator (5), an adjustment grille (6), and a temperature sensor (7), wherein: The regulator (5) is connected to a temperature sensor (7) at one end and to an adjustment grille (6) at the other end, and is used to control the working state of the radiator by controlling the angle of the adjustment grille (6). The grids in the regulating grid (6) are connected by hinges; The temperature sensor (7) is used to monitor the temperature of the blast furnace gas in real time and send the data to the regulator (5).

3. The energy-saving blast furnace gas temperature regulating device according to claim 2, characterized in that, The adjusting grille (6) is provided with an insulation layer on the outside.

4. The energy-saving blast furnace gas temperature regulating device according to claim 2, characterized in that, The working states of the radiator include low-temperature gas insulation state and high-temperature gas heat dissipation state. When the temperature of the blast furnace gas is within the range that the dust collector bag (3) can withstand, it switches to the low-temperature gas insulation state; when the temperature of the blast furnace gas is unbearable for the dust collector bag (3), it switches to the high-temperature gas heat dissipation state.

5. The energy-saving blast furnace gas temperature regulating device according to claim 2, characterized in that, The regulator (5) has an external power supply.

6. The energy-saving blast furnace gas temperature regulating device according to claim 1, characterized in that, The output end of the turbine (4) is connected to a hot blast stove or a blast furnace gas main pipeline.

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