CN210340797U - Blast furnace gas hydrolysis tower - Google Patents
Blast furnace gas hydrolysis tower Download PDFInfo
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- CN210340797U CN210340797U CN201921285055.6U CN201921285055U CN210340797U CN 210340797 U CN210340797 U CN 210340797U CN 201921285055 U CN201921285055 U CN 201921285055U CN 210340797 U CN210340797 U CN 210340797U
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Abstract
The utility model provides a blast furnace gas hydrolysis tower, which consists of a primary hydrolysis tower, a secondary hydrolysis tower and a connecting pipeline between the towers; the primary hydrolysis tower and the secondary hydrolysis tower are arranged side by side, the bottom of the primary hydrolysis tower is provided with a blast furnace gas inlet, and the upper part of the secondary hydrolysis tower is provided with a blast furnace gas outlet; one end of the inter-tower connecting pipeline is communicated with the top gas outlet of the first-stage hydrolysis tower, and the other end of the inter-tower connecting pipeline penetrates from the top of the second-stage hydrolysis tower and is directly inserted to the bottom of the second-stage hydrolysis tower. Catalyst layers are arranged in the middle of the first-stage hydrolysis tower and the second-stage hydrolysis tower. The blast furnace gas enters from the bottom of the first-stage hydrolysis tower, passes through the catalyst layer in the middle of the first-stage hydrolysis tower, enters the bottom of the second-stage hydrolysis tower through the inter-tower connecting pipeline after the first desulfurization treatment is finished, passes through the catalyst layer in the middle of the second-stage hydrolysis tower again, and is output from the blast furnace gas outlet in the upper part of the second-stage hydrolysis tower after the second desulfurization treatment is finished. The utility model effectively solves the problem of blast furnace gas desulfurization and realizes the standard emission after the blast furnace gas is combusted.
Description
Technical Field
The utility model relates to a blast furnace gas hydrolysis tower capable of effectively hydrolyzing and catalyzing COS in blast furnace gas. The blast furnace gas hydrolysis tower is applied to the blast furnace gas desulfurization process of the iron-making plant, and is one of the key devices for solving the problem of fine desulfurization of blast furnace gas at present.
Background
The blast furnace gas is a byproduct combustible gas in the blast furnace ironmaking production process, has large output and wide application, and can be used as a fuel for a power plant boiler, an iron-making plant hot blast stove and a steel-making plant heating furnace. The main components of the blast furnace gas are CO and CO2、N2And a small amount of COS and H2S、Cl-And the like.
Because blast furnace gas generated in the blast furnace ironmaking process is directly used as fuel of a power plant boiler, an iron-making plant hot blast stove and a steel-making plant heating furnace without desulfurization treatment at present, SO in the smoke emission of the power plant boiler, the iron-making plant hot blast stove and the steel-making plant heating furnace is caused2The content of the SO in the flue gas can not meet the national ultra-clean emission requirement, and the SO in the flue gas is generally emitted2The content is more than 50mg/m3Some production plants discharge SO in flue gas2Even up to 250mg/m3The above.
At present, no blast furnace gas desulfurization device is used in operation in China. Because the sulfur in the blast furnace gas is mainly COS, H2S only occupies a small part, and the key of the blast furnace gas desulfurization is to remove COS in the gas. The traditional gas desulfurization equipment such as a packed tower is mainly used for removing H in other kinds of gas (such as coke oven gas, artificial gas and the like)2S, which is not suitable for removal of COS from blast furnace gas.
Disclosure of Invention
In view of the above, the present invention is to provide a blast furnace gas hydrolysis tower, which can hydrolyze and convert COS in blast furnace gas into H2And S, realizing the real desulfurization of the blast furnace gas.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a blast furnace gas hydrolysis tower is composed of a primary hydrolysis tower, a secondary hydrolysis tower and connecting pipelines between the towers;
the primary hydrolysis tower and the secondary hydrolysis tower are arranged side by side, the bottom of the primary hydrolysis tower is provided with a blast furnace gas inlet, and the upper part of the secondary hydrolysis tower is provided with a blast furnace gas outlet;
one end of the inter-tower connecting pipeline is communicated with the top of the primary hydrolysis tower, and the other end of the inter-tower connecting pipeline penetrates from the top of the secondary hydrolysis tower and is directly inserted to the bottom of the secondary hydrolysis tower;
a catalyst layer is arranged in the middle of the primary hydrolysis tower; a catalyst layer is arranged in the middle of the secondary hydrolysis tower;
and the blast furnace gas enters from the bottom of the primary hydrolysis tower, passes through the catalyst layer in the middle of the primary hydrolysis tower, enters the bottom of the secondary hydrolysis tower through the inter-tower connecting pipeline after the primary desulfurization treatment is finished, passes through the catalyst layer in the middle of the secondary hydrolysis tower again, and is output from the blast furnace gas outlet in the upper part of the secondary hydrolysis tower after the secondary desulfurization treatment is finished.
In the preferred embodiment of the present invention, the catalyst layer is made of activated carbon, activated coke or TiO2Or Zr2O3A hydrolysis catalyst as a matrix; the space velocity of the catalyst layer is 3000-5000h-1。
In the preferred embodiment of the utility model, the bottom of the catalyst layer in the first-stage hydrolysis tower is provided with a discharge opening, and the top of the catalyst layer is provided with a packing gland with vent holes; the bottom of the catalyst layer of the secondary hydrolysis tower is provided with a discharge opening, and the top of the catalyst layer is provided with a packing gland with a vent hole.
In the preferred embodiment of the present invention, a separator is disposed below the outlet of the blast furnace gas of the secondary hydrolysis tower.
In the preferred embodiment of the present invention, a downward inclined notch is formed at the end of the pipe connected to the gas inlet of the blast furnace in the primary hydrolysis tower.
In the preferred embodiment of the present invention, the bottom of the first-stage hydrolysis tower and the bottom of the second-stage hydrolysis tower are respectively provided with a drain outlet and a blowing outlet.
Drawings
Fig. 1 is a schematic structural diagram of a blast furnace gas hydrolysis tower of the present invention.
Detailed Description
The structure and features of the present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that various modifications can be made to the embodiments disclosed herein, and therefore, the embodiments disclosed in the specification should not be considered as limitations of the present invention, but merely as exemplifications of the embodiments, which are intended to make the features of the present invention apparent.
As shown in fig. 1, the blast furnace gas hydrolysis tower provided by the utility model is composed of a primary hydrolysis tower 1, a secondary hydrolysis tower 2 and an inter-tower connecting pipeline 3; the primary hydrolysis tower 1 and the secondary hydrolysis tower 2 are arranged side by side, the bottom of the primary hydrolysis tower 1 is provided with a blast furnace gas inlet 11, and the upper part of the secondary hydrolysis tower 2 is provided with a blast furnace gas outlet 21; one end of the inter-tower connecting pipeline 3 is communicated with the top of the first-stage hydrolysis tower 1, and the other end of the inter-tower connecting pipeline penetrates from the top of the second-stage hydrolysis tower 2 and is directly inserted to the bottom of the second-stage hydrolysis tower 2.
The blast furnace gas enters the primary rough stripping tower from the bottom of the primary hydrolysis tower 1, passes through the catalyst layer in the middle of the primary hydrolysis tower, enters the bottom of the secondary hydrolysis tower 2 through the inter-tower connecting pipeline 3 after the primary desulfurization treatment is finished, passes through the catalyst layer in the middle of the secondary hydrolysis tower again, and is output from the blast furnace gas outlet in the upper part of the secondary hydrolysis tower after the secondary desulfurization treatment is finished.
As shown in fig. 1, a blast furnace gas inlet 11 is provided at the bottom of the first-stage hydrolysis tower 1, a solid catalyst layer 12 is provided at the middle of the first-stage hydrolysis tower, a discharge opening 13 is provided at the bottom of the solid catalyst layer, a packing gland 14 with a vent hole is provided at the top of the solid catalyst layer to prevent the blast furnace gas from blowing up the solid catalyst when moving from the bottom to the top of the tower, and a charging opening/inspection opening 15 is provided above the solid catalyst layer.
Similarly, as shown in fig. 1, the middle part of the secondary hydrolysis tower 2 is also provided with a solid catalyst layer 22. The bottom of the solid catalyst layer is provided with a discharge opening 23, the top of the solid catalyst layer is provided with a packing gland 24 with a vent hole to prevent the blast furnace gas from blowing up the solid catalyst when moving from the bottom to the top of the tower, and a charging opening/access opening 25 is arranged above the solid catalyst layer.
For the COS in making the blast furnace gas fully hydrolysises and converts into H2S, the utility model designs a two-stage hydrolysis conversion tower, as shown in figure 1, the blast furnace gas after the desulfurization treatment of one-level hydrolysis tower gets into the second grade hydrolysis tower from the bottom of second grade hydrolysis tower 2 through connecting tube 3 between the tower, and after carrying out desulfurization treatment once more through the catalyst layer 22 of second grade hydrolysis tower, export from the blast furnace gas export 21 on second grade hydrolysis tower 2 upper portion.
Because the sulfur in the blast furnace gas is mainly COS, H2S is only a small proportion, H2S in the S can be removed by spraying alkali-containing water, and the S in the COS is not well removed by spraying alkali-containing water, so that the key of the blast furnace gas desulfurization is to remove the COS in the gas. As is well known, blast furnace gas contains certain moisture, therefore, the utility model discloses let in blast furnace gas in the blast furnace gas hydrolysis tower, under the effect of catalyst in the hydrolysis tower, make COS in the blast furnace gas and water take place the hydrolysis conversion reaction under the effect of catalyst: COS + H2O=H2S+CO2Hydrolyzing COS to convert it to H2And S. Due to H2S in S can be removed by spraying alkaline water, so that H is removed by other equipment (spraying alkaline water) in the subsequent process2S, thereby achieving the aim of desulfurizing the blast furnace gas.
The hydrolysis tower is provided with a hydrolysis catalyst which is active carbon, active coke or TiO2Or Zr2O3A hydrolysis catalyst as a matrix. The space velocity of the catalyst layer is 3000--1. Tests show that the desulfurization conversion efficiency is up to more than 92%.
For facilitating the overhaul of the equipment, as shown in figure 1, the utility model is provided with drain outlets 16 and 26 and purge outlets 17 and 27 at the bottom of the first-stage hydrolysis tower 1 and the second-stage hydrolysis tower 2. The gas diffusing device 4 is arranged on the connecting pipeline 3 between the towers, so that gas replacement is convenient to carry out during production and maintenance.
As shown in fig. 1, the lower part of the blast furnace gas outlet 21 of the second stage hydrolysis tower 2 of the present invention is provided with a separator 28, which functions as: the catalyst is prevented from entering a follow-up pipeline of the blast furnace gas along with the output of the blast furnace gas, the influence on a TRT (blast furnace gas recovery turbine) or a pressure regulating valve bank is avoided, and the influence on the existing production process is avoided.
As shown in figure 1, in the first-stage hydrolysis tower, the end part of the pipeline connected with the blast furnace gas inlet 11 is a downward inclined notch 18, so that the blast furnace gas is prevented from directly scouring the catalyst to cause the loss of the catalyst.
As shown in fig. 1, each tower is provided with a support 5 for supporting the tower body, which facilitates installation.
Constitute the utility model discloses a diameter, the high blast furnace gas volume that will handle of one-level hydrolysis tower and second grade hydrolysis tower design, generally its diameter is 6-7 meters on the whole, highly is higher than 28 meters, and its gas tightness, pressure-bearing nature, leak-proof design can according to the design of national design standard, no longer give consideration to here.
The utility model has the advantages of it is following:
1. the utility model can effectively solve the problem of blast furnace gas desulfurization and realize the standard emission after the blast furnace gas is combusted.
2. The utility model discloses carry out leading desulfurization to blast furnace gas, will carry the blast furnace gas after desulfurization treatment again and use for each blast furnace gas user, make each blast furnace gas user needn't add desulfurization equipment respectively, saved a large amount of funds and industrial land.
3. Catalyzing blast furnace gas to make COS in the blast furnace gas be catalyzed into H2And S, the blast furnace gas desulfurization process is simplified.
4. The two-stage hydrolysis tower is adopted to improve the catalytic rate of COS in the blast furnace gas and catalyze the COS into H as much as possible2S, high hydrolysis conversion rate.
5. The primary hydrolysis tower adopts a design of bottom-in and top-out, even if a small amount of dust exists in blast furnace gas, the dust can be blocked at the lower part, the influence of the dust on the catalyst is reduced, the service efficiency of the catalyst is improved, and the service life of the catalyst is prolonged;
6. the upper part in the secondary hydrolysis tower is provided with the separator, so that the catalyst is prevented from entering a subsequent pipeline along with the output of blast furnace gas, the influence on a blast furnace TRT or a pressure regulating valve bank is avoided, and the influence on the existing production process is avoided.
7. Packing glands are arranged above the catalyst layers of the first-stage hydrolysis tower and the second-stage hydrolysis tower, so that the catalyst can be effectively prevented from being blown up by coal gas, the integral stability of the catalyst is ensured, and the reduction of the catalytic efficiency is caused;
8. the blast furnace gas after the desulfurization treatment of the first-stage hydrolysis tower goes deep into the lower part of the catalyst layer of the second-stage hydrolysis tower through the inter-tower connecting pipeline, so that the catalyst loss caused by direct blowing and brushing of the gas on the catalyst is avoided.
Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting 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 or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (6)
1. A blast furnace gas hydrolysis tower is characterized in that: the device consists of a primary hydrolysis tower, a secondary hydrolysis tower and an inter-tower connecting pipeline;
the primary hydrolysis tower and the secondary hydrolysis tower are arranged side by side, the bottom of the primary hydrolysis tower is provided with a blast furnace gas inlet, and the upper part of the secondary hydrolysis tower is provided with a blast furnace gas outlet;
one end of the inter-tower connecting pipeline is communicated with the top of the primary hydrolysis tower, and the other end of the inter-tower connecting pipeline penetrates from the top of the secondary hydrolysis tower and is directly inserted to the bottom of the secondary hydrolysis tower;
a catalyst layer is arranged in the middle of the primary hydrolysis tower; a catalyst layer is arranged in the middle of the secondary hydrolysis tower;
and the blast furnace gas enters from the bottom of the primary hydrolysis tower, passes through the catalyst layer in the middle of the primary hydrolysis tower, enters the bottom of the secondary hydrolysis tower through the inter-tower connecting pipeline after the primary desulfurization treatment is finished, passes through the catalyst layer in the middle of the secondary hydrolysis tower again, and is output from the blast furnace gas outlet in the upper part of the secondary hydrolysis tower after the secondary desulfurization treatment is finished.
2. The blast furnace gas hydrolysis column according to claim 1, characterized in that: the catalyst layer is made of active carbon or active coke or TiO2Or Zr2O3A hydrolysis catalyst as a matrix; the space velocity of the catalyst layer is 3000-5000h-1。
3. The blast furnace gas hydrolysis column according to claim 2, characterized in that: a discharge opening is formed in the bottom of the catalyst layer in the first-stage hydrolysis tower, and a packing gland with a vent hole is formed in the top of the catalyst layer;
the bottom of the catalyst layer of the secondary hydrolysis tower is provided with a discharge opening, and the top of the catalyst layer is provided with a packing gland with a vent hole.
4. The blast furnace gas hydrolysis column according to claim 3, characterized in that: a separator is arranged below the blast furnace gas outlet of the secondary hydrolysis tower.
5. The blast furnace gas hydrolysis column according to claim 4, characterized in that: and a downward inclined notch is arranged at the end part of the pipeline connected with the blast furnace gas inlet in the first-stage hydrolysis tower.
6. The blast furnace gas hydrolysis column according to claim 5, characterized in that: and a drain outlet and a blowing opening are respectively arranged at the bottoms of the first-stage hydrolysis tower and the second-stage hydrolysis tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921285055.6U CN210340797U (en) | 2019-08-08 | 2019-08-08 | Blast furnace gas hydrolysis tower |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921285055.6U CN210340797U (en) | 2019-08-08 | 2019-08-08 | Blast furnace gas hydrolysis tower |
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| CN210340797U true CN210340797U (en) | 2020-04-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110467944A (en) * | 2019-08-08 | 2019-11-19 | 佰利天控制设备（北京）有限公司 | Blast furnace gas hydrolysis tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110467944A (en) * | 2019-08-08 | 2019-11-19 | 佰利天控制设备（北京）有限公司 | Blast furnace gas hydrolysis tower |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | "change of name, title or address" |
Address after: 100101 Room 601, 6 / F, building 1, yard 8, Beichen East Road, Chaoyang District, Beijing Patentee after: Britian control equipment (Beijing) Co.,Ltd. Address before: 100102 unit 3, 6th floor, building 3, yard 1, Futong East Street, Chaoyang District, Beijing Patentee before: LOFON CONTROL EQUIPMENT (BEIJING) Co.,Ltd. |
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| CP03 | "change of name, title or address" |