Dry denitrification system

Abstract

The application discloses a dry denitrification system, which comprises an air compression device provided with an air inlet and an air outlet, a filtering device provided with a filtering inlet and a filtering outlet, and a denitrification device provided with a denitrification inlet and a denitrification outlet. The filtering inlet is communicated with the air outlet, and the denitrification inlet is communicated with the filtering outlet. The filtering device is provided with a first adsorbent for adsorbing water and oxygen, and the denitrification device is provided with a second adsorbent for adsorbing nitrogen. The dry denitrification system can filter nitrogen in blast furnace gas, realize blast furnace gas enrichment, reduce the utilization difficulty of blast furnace gas, and improve the calorific value and utilization rate of blast furnace gas.

Description

Technical Field

[0001] This application relates to the field of blast furnace gas enrichment technology, and in particular to a dry denitrification system. Background Technology

[0002] Blast furnace gas is a by-product of iron and steel production. Nitrogen accounts for about half of its total composition. Since nitrogen does not participate in the combustion process, it occupies an effective volume while carrying away a significant amount of heat, resulting in a low calorific value and low combustion efficiency. Preheating, oxygen enrichment, or mixing with coke oven gas are often required during ignition. Therefore, the utilization rate of blast furnace gas is low, and its utilization is challenging. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a dry denitrification system capable of filtering nitrogen from blast furnace gas, thereby enriching the blast furnace gas, reducing the difficulty of utilizing blast furnace gas, and improving the calorific value and utilization rate of blast furnace gas.

[0004] A dry denitrification system according to an embodiment of this application includes: an air compression device having an air inlet and an air outlet, the air inlet being adapted to carry blast furnace gas; a filtration device having a filter inlet and a filter outlet, the filter inlet being connected to the air outlet; and a denitrification device having a denitrification inlet and a denitrification outlet, the denitrification inlet being connected to the filter outlet; wherein the filtration device contains a first adsorbent for adsorbing moisture and oxygen, and the denitrification device contains a second adsorbent for adsorbing nitrogen.

[0005] The dry denitrification system according to the embodiments of this application can filter nitrogen in blast furnace gas, thereby enriching the blast furnace gas, reducing the difficulty of blast furnace gas utilization, and improving the calorific value and utilization rate of blast furnace gas. At the same time, removing nitrogen from blast furnace gas can reduce nitrogen oxides in the combustion process while achieving source control, reduce the load on the end denitrification equipment, effectively reduce nitrogen oxide emissions, and benefit environmental development.

[0006] According to some embodiments of the present application, the dry denitrification system includes a plurality of denitrification towers, each of which is filled with the second adsorbent, and the plurality of denitrification towers are arranged in parallel.

[0007] According to some embodiments of the dry denitrification system of this application, there are two denitrification towers, which are connected in parallel.

[0008] The dry denitrification system according to some embodiments of this application further includes: two control valves, each of which is used to control the opening or closing of one of the denitrification towers.

[0009] The dry denitrification system according to some embodiments of this application further includes a first pressure gauge for detecting the gas pressure inside the denitrification tower.

[0010] According to some embodiments of the dry denitrification system of this application, there are two first pressure gauges, and the two first pressure gauges correspond one-to-one with the two denitrification towers.

[0011] The dry denitrification system according to some embodiments of this application further includes a second pressure gauge for detecting the gas pressure within the filtration device.

[0012] The dry denitrification system according to some embodiments of this application further includes: a flow regulating valve, wherein the denitrification device is connected between the filter device and the flow regulating valve.

[0013] The dry denitrification system according to some embodiments of this application further includes: a gas storage cylinder disposed between the denitrification outlet and the flow regulating valve.

[0014] According to some embodiments of the dry denitrification system of this application, the air compression device includes a blower.

[0015] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a dry denitrification system according to some embodiments of this application.

[0017] Figure label: 100 dry denitrification system; Air compression device 10; filtration device 20; denitrification device 30; denitrification tower 31; First pressure gauge 40; Second pressure gauge 50; Flow regulating valve 60; Gas storage cylinder 70; 80 end users. Detailed Implementation

[0018] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0019] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0020] Blast furnace gas is a by-product of iron and steel production. Nitrogen accounts for about half of its total composition. Since nitrogen does not participate in the combustion process, it occupies an effective volume while carrying away a significant amount of heat, resulting in a low calorific value and low combustion efficiency. Preheating, oxygen enrichment, or mixing with coke oven gas are often required during ignition. Therefore, the utilization rate of blast furnace gas is low, and its utilization is challenging.

[0021] In response, this application proposes a dry denitrification system 100, which can filter nitrogen in blast furnace gas, thereby enriching blast furnace gas, reducing the difficulty of blast furnace gas utilization, and improving the calorific value and utilization rate of blast furnace gas.

[0022] like Figure 1 As shown, the dry denitrification system 100 according to an embodiment of this application includes: an air compression device 10, a filter device 20, and a denitrification device 30.

[0023] The air compressor 10 is provided with an air inlet and an air outlet. The air inlet is suitable for blast furnace gas. The filter 20 is provided with a filter inlet and a filter outlet. The filter inlet is connected to the air outlet. The denitrification device 30 is provided with a denitrification inlet and a denitrification outlet. The denitrification inlet is connected to the filter outlet.

[0024] It is understandable that, through the above setup, the blast furnace gas flows sequentially through the gas inlet, gas outlet, filter inlet, filter device 20, filter outlet, denitrification inlet, denitrification device 30, and denitrification inlet, and adjacent openings can be connected by pipelines.

[0025] For example, the air compressor 10 can pressurize the blast furnace gas to 0.2 MPa. In this way, the pressure of the blast furnace gas can be increased by the air compressor, thereby increasing the pressure and flow rate of the blast furnace gas, which in turn facilitates the improvement of the flow efficiency of the blast furnace gas.

[0026] Furthermore, the filter device 20 is equipped with a first adsorbent for adsorbing moisture and oxygen. In this way, the moisture and oxygen in the blast furnace gas can be adsorbed by the first adsorbent, thereby achieving the first filtration of the blast furnace gas, realizing the pretreatment of denitrification of the blast furnace gas, and purifying the blast furnace gas.

[0027] The denitrification device 30 is equipped with a second adsorbent for adsorbing nitrogen. This second adsorbent can adsorb nitrogen from the blast furnace gas. For example, the second adsorbent can be a denitrification adsorbent, which specifically adsorbs nitrogen from the blast furnace gas, thereby separating CO and nitrogen from the blast furnace gas and achieving denitrification treatment of the blast furnace gas. This enriches the blast furnace gas, reduces the difficulty of utilizing it, and increases its calorific value and utilization rate. Simultaneously, removing nitrogen from the blast furnace gas reduces nitrogen oxides during combustion while simultaneously addressing the issue at its source, alleviating the load on end-of-pipe denitrification equipment, effectively reducing nitrogen oxide emissions, and benefiting environmental development.

[0028] The dry denitrification system 100 according to the embodiments of this application can filter nitrogen in blast furnace gas, thereby enriching the blast furnace gas, reducing the difficulty of blast furnace gas utilization, and improving the calorific value and utilization rate of blast furnace gas. At the same time, removing nitrogen from blast furnace gas can reduce nitrogen oxides in the combustion process while achieving source control, reduce the load on the end denitrification equipment, effectively reduce nitrogen oxide emissions, and benefit environmental development.

[0029] In some embodiments, such as Figure 1 As shown, the denitrification device 30 includes multiple denitrification towers 31, each of which is filled with a second adsorbent, and the multiple denitrification towers 31 are arranged in parallel.

[0030] In this way, multiple denitrification channels can be formed, which facilitates the increase of denitrification efficiency of blast furnace gas through multiple denitrification towers 31. Furthermore, the multiple denitrification towers 31 are set in parallel, so that after one denitrification tower 31 is saturated with adsorption, denitrification can be achieved through another denitrification tower 31.

[0031] In some embodiments, such as Figure 1 As shown, the dry denitrification system 100 also includes: two denitrification towers 31, which are connected in parallel.

[0032] In this way, two denitrification channels can be formed, which facilitates the increase of denitrification efficiency of blast furnace gas through two denitrification towers 31. The two denitrification towers 31 are set in parallel, so that after the adsorption of one denitrification tower 31 is saturated, denitrification can be achieved through the other denitrification tower 31.

[0033] In some embodiments, such as Figure 1As shown, the dry denitrification system 100 also includes two control valves, each used to control the opening or closing of a denitrification tower 31. This facilitates the control of the opening or closing of the corresponding denitrification tower 31 using the control valves.

[0034] In some embodiments, such as Figure 1 As shown, the dry denitrification system 100 also includes a first pressure gauge 40, which is used to detect the gas pressure inside the denitrification tower 31.

[0035] This facilitates the detection of gas pressure inside the denitrification tower 31 via the first pressure gauge 40, thereby enabling real-time monitoring of the gas pressure inside the denitrification tower 31.

[0036] In some embodiments, such as Figure 1 As shown, there are two first pressure gauges 40, and the two first pressure gauges 40 correspond one-to-one with the two denitrification towers 31.

[0037] This allows for the detection of gas pressure within the corresponding denitrification tower 31 by two first pressure gauges 40, thereby enabling real-time monitoring of the gas pressure within the corresponding denitrification tower 31.

[0038] In some embodiments, such as Figure 1 As shown, the dry denitrification system 100 also includes a second pressure gauge 50, which is used to detect the gas pressure inside the filter device 20.

[0039] This facilitates the detection of gas pressure within the filter device 20 via the second pressure gauge 50, thereby enabling real-time monitoring of the gas pressure within the filter device 20.

[0040] In some embodiments, such as Figure 1 As shown, the dry denitrification system 100 also includes a flow regulating valve 60, and the denitrification device 30 is connected between the filter device 20 and the flow regulating valve 60.

[0041] This facilitates the control of the flow rate of the denitrified blast furnace gas via the flow regulating valve 60.

[0042] In some embodiments, such as Figure 1 As shown, the dry denitrification system 100 also includes a gas storage cylinder 70, which is located between the denitrification outlet and the flow regulating valve 60.

[0043] In some embodiments, such as Figure 1 As shown, the gas storage cylinder 70 delivers the denitrified blast furnace gas to the end user 80 through the flow regulating valve 60.

[0044] This facilitates the storage of denitrified blast furnace gas using gas storage cylinder 70, preventing its direct release into the air and enabling the recycling of denitrified blast furnace gas.

[0045] In some embodiments, the air compressor 10 includes a blower.

[0046] This makes it easier to increase the pressure of blast furnace gas using a blower, and the blower's structure is relatively simple, which helps to reduce the difficulty and cost of installation.

[0047] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and 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 of this application.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0049] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A dry denitrification system (100), characterized in that, include: An air compression device (10) is provided with an air inlet and an air outlet, wherein the air inlet is suitable for supplying blast furnace gas; A filter device (20) is provided with a filter inlet and a filter outlet, wherein the filter inlet is connected to the air outlet; A denitrification device (30) is provided with a denitrification inlet and a denitrification outlet, wherein the denitrification inlet is connected to the filter outlet; The filter device (20) is equipped with a first adsorbent for adsorbing moisture and oxygen, and the denitrification device (30) is equipped with a second adsorbent for adsorbing nitrogen.

2. The dry denitrification system (100) according to claim 1, characterized in that, The denitrification device (30) includes a plurality of denitrification towers (31), each of which is filled with the second adsorbent, and the plurality of denitrification towers (31) are arranged in parallel.

3. The dry denitrification system (100) according to claim 2, characterized in that, There are two denitrification towers (31), and the two denitrification towers (31) are connected in parallel.

4. The dry denitrification system (100) according to claim 3, characterized in that, Also includes: Two control valves, each of which is used to control the opening or closing of one of the denitrification towers (31).

5. The dry denitrification system (100) according to claim 4, characterized in that, It also includes a first pressure gauge (40) for detecting the gas pressure inside the denitrification tower (31).

6. The dry denitrification system (100) according to claim 5, characterized in that, There are two first pressure gauges (40), and the two first pressure gauges (40) correspond one-to-one with the two denitrification towers (31).

7. The dry denitrification system (100) according to claim 1, characterized in that, It also includes a second pressure gauge (50) for detecting the gas pressure inside the filter device (20).

8. The dry denitrification system (100) according to claim 1, characterized in that, Also includes: A flow regulating valve (60) is provided, and the denitrification device (30) is connected between the filter device (20) and the flow regulating valve (60).

9. The dry denitrification system (100) according to claim 8, characterized in that, Also includes: A gas storage cylinder (70) is disposed between the denitrification outlet and the flow regulating valve (60).

10. The dry denitrification system (100) according to claim 1, characterized in that, The air compression device (10) includes a blower.

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