CN217230609U - Coke oven coal charging process gas export system matched with raw coke oven gas reforming - Google Patents
Coke oven coal charging process gas export system matched with raw coke oven gas reforming Download PDFInfo
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- CN217230609U CN217230609U CN202220732486.8U CN202220732486U CN217230609U CN 217230609 U CN217230609 U CN 217230609U CN 202220732486 U CN202220732486 U CN 202220732486U CN 217230609 U CN217230609 U CN 217230609U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model relates to a coke oven coal charging process gas export system matched with crude gas reforming, which comprises a coke oven unit, a crude gas reforming unit, a compressor, a supercharging device, a desulphurization unit, a high-pressure reducing gas nozzle and a control valve; raw coke oven gas generated by each carbonization chamber of the coke oven unit is converged in a gas collecting pipe, enters a raw coke oven gas reforming unit to be converted into original gas, is pressurized and then is sent to a desulfurization unit or a high-pressure desulfurization unit, and a part of reducing gas before or after desulfurization is further pressurized to form high-pressure reducing gas to be returned to the coke oven unit; the high-pressure reducing gas before high-pressure desulfurization directly returns to the coke oven unit; when the coke pushing of a certain carbonization chamber is finished and the coal charging is started, the high-pressure reducing gas is sprayed downwards from the upper part of the bridge pipe along the flowing direction of the raw coke oven gas to form negative pressure in the carbonization chamber, so that the raw coke oven gas is prevented from escaping outwards.
Description
Technical Field
The utility model relates to a coking production technical field especially relates to a supporting coke oven coal-charging process gas derivation system of raw coke oven gas reforming.
Background
The coke is an important raw material for iron making, in the traditional coking process, one coke oven is provided with a plurality of coking chambers, coal is carbonized into coke in each coking chamber at high temperature, simultaneously generated crude gas escapes from corresponding ascending pipes at the top of each coking chamber, after the crude gas generated by different coking chambers is sprayed and cooled by circulating ammonia water in a bridge pipe, the crude gas is converged in a gas collecting pipe and is uniformly conveyed through a gas suction pipeline to enter a gas purification system.
The coking coal is converted into coke through dry distillation, and after the coke in the coking chamber is pushed out by the coke pusher, the coking chamber is filled with new coking coal to continuously produce the coke. In the whole coal charging process, in order to avoid the phenomenon that the raw coke oven gas escapes from the coking chamber in the coal charging state, negative pressure is formed in the space in the coking chamber at the top of the bridge pipe by a method of spraying high-pressure ammonia water, so that the external atmospheric pressure is higher than the pressure in the coking chamber, and the escape of the raw coke oven gas is avoided.
In order to cope with global climate and environment changes and achieve the goals of carbon peak reaching and carbon neutralization, the hydrogen metallurgy process will occupy a larger and larger proportion in the future steel production. Meanwhile, the method for obtaining hydrogen through high-temperature raw gas is the most economical process scheme for obtaining reducing gas at present and is the most effective transition means before the cost of hydrogen production by electrolysis of green energy sources is reduced.
The high-temperature raw gas reforming hydrogen production process is a process for directly carrying out partial oxidation reforming without cooling after uniformly collecting raw coke oven gas escaping from a riser at the top of a carbonization chamber. Because the raw gas is directly reformed without being cooled, the energy consumption of the whole process flow is lower, and the temperature system is more reasonable. Meanwhile, due to the fact that circulating ammonia water spraying is cancelled, escape of smoke dust in the coal charging process of the coke oven cannot be reduced through high-pressure ammonia water (the carbonization chamber cannot generate negative pressure because a small amount of high-pressure ammonia water is sprayed into high-temperature raw coke oven gas which is not cooled and can be rapidly gasified to generate volume expansion).
Therefore, a gas export process suitable for a coke oven matched with crude gas reforming in a coal charging process is needed, high-efficiency export of high-temperature crude gas is realized under the condition that the high-temperature crude gas cannot be cooled by circulating ammonia water, and smoke dust is prevented from escaping in the coal charging process of the coke oven.
SUMMERY OF THE UTILITY MODEL
The utility model provides a supporting coke oven coal-charging process gas derivation system of raw coke oven gas reforming returns coke oven unit after the reducing gas after reforming a part of raw coke oven gas pressurizes, spout into raw coke oven gas from the bridge pipe department, forms the negative pressure in the carbomorphism room to avoid the escape of raw coke oven gas.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a coke oven coal charging process gas export system matched with crude gas reforming comprises a coke oven unit, a crude gas reforming unit, a compressor, a supercharging device, a desulphurization unit, a high-pressure reducing gas nozzle and a control valve; the gas collecting pipe of the coke oven unit is connected with the crude gas reforming unit through a crude gas pipeline, the crude gas reforming unit is sequentially connected with the supercharging device and the desulfurization unit through a reducing gas pipeline, the reducing gas pipeline at the downstream of the supercharging device or the downstream of the desulfurization unit is sequentially connected with the compressor and the high-pressure reducing gas nozzle arranged at the upper part of the middle bridge pipe of the coke oven unit through a reducing gas branch pipeline, and the reducing gas branch pipeline at the upstream of the high-pressure reducing gas nozzle is provided with a control valve.
The desulfurization unit is replaced by a high-pressure desulfurization unit without a compressor and a reducing gas branch pipeline; the gas collecting pipe of the coke oven unit is connected with the raw gas reforming unit through a raw gas pipeline, and the raw gas reforming unit is sequentially connected with the supercharging device and the high-pressure desulfurization unit through a reducing gas pipeline; the reducing gas pipeline at the downstream of the supercharging device is connected with a high-pressure reducing gas nozzle arranged at the upper part of a bridge pipe in the coke oven unit through a high-pressure reducing gas pipeline, and a control valve is arranged on the high-pressure reducing gas pipeline at the upstream of the high-pressure reducing gas nozzle.
And the included angle between the central line of the high-pressure reducing gas nozzle and the flowing direction of the crude gas at the lower section of the bridge pipe is not more than 20 degrees.
Compared with the prior art, the beneficial effects of the utility model are that:
pressurizing a part of reducing gas reformed by the crude gas, returning the part of reducing gas to the coke oven unit, spraying the part of reducing gas into the crude gas from the bridge pipe, and forming negative pressure in the carbonization chamber so as to avoid the escape of the crude gas.
Drawings
FIG. 1 is a schematic structural diagram of a gas export system of a coke oven matched with raw coke oven gas reforming in the coal charging process in embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a gas leading-out system of the coke oven matched with raw coke oven gas reforming in the coal charging process in the embodiment 2 of the invention.
FIG. 3 is a schematic structural diagram of a gas export system of a coke oven matched with raw coke oven gas reforming in the coal charging process in embodiment 3 of the present invention.
Fig. 4 is an enlarged view of a portion a in fig. 1 to 3.
In the figure: 1. coke oven unit 11, ascending pipe 12, bridge pipe 13, gas collecting pipe 2, raw gas reforming unit 3, compressor 4, supercharging device 5, desulphurization unit 5', high pressure desulphurization unit 6, high pressure reducing gas nozzle 7, control valve
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1 and 2, the gas guiding system for coke oven coal charging process of matching raw coke oven gas reforming of the present invention comprises a coke oven unit 1, a raw coke oven gas reforming unit 2, a compressor 3, a supercharging device 4, a desulphurization unit 5, a high pressure reducing gas nozzle 6 and a control valve 7; the gas collecting pipe 13 of the coke oven unit 1 is connected with the crude gas reforming unit 2 through a crude gas pipeline, the crude gas reforming unit 2 is sequentially connected with the supercharging device 4 and the desulphurization unit 5 through a reducing gas pipeline, the reducing gas pipeline at the downstream of the supercharging device 4 or the downstream of the desulphurization unit 5 is sequentially connected with the compressor 3 and the high-pressure reducing gas nozzle 6 arranged at the upper part of the bridge pipe 12 in the coke oven unit 1 through a reducing gas branch pipeline, and the reducing gas branch pipeline at the upstream of the high-pressure reducing gas nozzle 6 is provided with the control valve 7.
As shown in fig. 3, the gas guiding system for coke oven coal charging process of matching raw coke oven gas reforming of the present invention, the desulfurization unit 5 is replaced by a high pressure desulfurization unit 5', and a compressor 3 and a reducing gas branch pipeline are not provided; the gas collecting pipe 13 of the coke oven unit 1 is connected with the crude gas reforming unit 2 through a crude gas pipeline, the crude gas reforming unit 2 is sequentially connected with the supercharging device 4 and the high-pressure desulphurization unit 5' through a reducing gas pipeline, the reducing gas pipeline at the downstream of the supercharging device 4 is connected with the high-pressure reducing gas nozzle 6 arranged at the upper part of the bridge pipe 12 in the coke oven unit 1 through a high-pressure reducing gas pipeline, and the high-pressure reducing gas pipeline at the upstream of the high-pressure reducing gas nozzle 6 is provided with the control valve 7.
The included angle between the central line of the high-pressure reducing gas nozzle 6 and the flowing direction of the crude gas at the lower section of the bridge pipe 12 is not more than 20 degrees.
As shown in fig. 1-4, the process of the gas export system for the coke oven coal charging process based on the raw gas reforming of the present invention is as follows:
1) in the coke oven unit 1, the crude gas escaping from the top of the single-hole carbonization chamber enters a bridge pipe 12 through a rising pipe 11 and then downwards enters a gas collecting pipe 13;
2) raw gas generated by each carbonization chamber of the coke oven unit 1 is converged in a gas collecting pipe 13 and then enters a raw gas reforming unit 2;
3) in the raw gas reforming unit 2, the raw gas is subjected to incomplete oxidation reaction and is converted into reducing gas mainly comprising hydrogen and carbon monoxide;
4) the reducing gas is sent out after waste heat recovery, temperature reduction and dust removal in the raw coke oven gas reforming unit 2, and is sent to a desulfurization unit 5 (shown in figures 1 and 2) or a high-pressure desulfurization unit 5' (shown in figure 3) after pressurization, and a part of reducing gas before or after desulfurization is further pressurized into high-pressure reducing gas to be returned to the coke oven unit 1; the high-pressure reducing gas before high-pressure desulfurization directly returns to the coke oven unit 1;
5) in the coke oven unit 1, when a certain coking chamber finishes coke pushing and coal charging starts, high-pressure reducing gas is sprayed downwards from the upper part of the bridge pipe 12 along the flow direction of raw coke oven gas; and after the coal charging operation of the corresponding carbonization chamber is finished, closing the furnace door of the corresponding carbonization chamber, and stopping jetting the high-pressure reducing gas.
The coke oven unit 1 is provided with a plurality of carbonization chambers, the number of the carbonization chambers is 20-160 according to the types of ovens or oven groups, as shown in fig. 4, the top of each carbonization chamber is provided with an ascending pipe 11, each ascending pipe 11 is connected with a gas collecting pipe 13 through a corresponding bridge pipe 12, and crude gas flowing upwards along the ascending pipe 11 is converted to downwards enter the gas collecting pipe 13. In the coke oven unit 1, the upper part of each bridge pipe 12 is provided with a high-pressure reducing gas nozzle 6 and a matched control valve 7.
The control valve 7 is opened when the coking chamber starts coal charging operation, and is synchronously closed when the furnace door of the coking chamber is closed.
The high-pressure reducing gas nozzle 6 is arranged such that the gas injection direction is downward, and the included angle between the center line of the nozzle and the flow direction (vertical direction) of the raw coke oven gas in the bridge pipe 12 is not more than 20 °.
The reducing gas at the inlet of said compressor 3 comes from the reducing gas duct downstream of the supercharging device 4 and also from the reducing gas duct downstream of the desulfurization unit 5.
If a high-pressure desulfurization process is used for desulfurization of the reducing gas, the compressor 3 is eliminated. The high-pressure reducing gas pressurized by the pressurizing device 4 at the upstream of the high-pressure desulfurization unit 5' can be directly introduced to the coke oven unit 1.
The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation processes are given, but the scope of the present invention is not limited to the following examples.
[ example 1 ]
As shown in fig. 1, in this embodiment, a gas leading-out system in a coal charging process of a coke oven matched with raw coke oven gas reforming includes a coke oven unit, a raw coke oven gas reforming unit, a compressor, a pressure boosting device, a desulfurization unit, a high-pressure reducing gas nozzle, and a control valve. The gas guiding process in the coal charging process of the coke oven comprises the following steps:
1) raw coke oven gas escaping from the top of a single-hole carbonization chamber in the coke oven unit 1 enters a bridge pipe 12 after passing through a rising pipe 11 at the top of the single-hole carbonization chamber, and then enters a gas collecting pipe 13 downwards;
2) raw gas generated by each carbonization chamber is converged in a gas collecting pipe 13 and then uniformly enters a raw gas reforming unit 2;
3) in the raw gas reforming unit 2, the raw gas is subjected to incomplete oxidation reaction and is converted into reducing gas mainly comprising hydrogen and oxygen;
4) the reducing gas is subjected to waste heat recovery, temperature reduction and dust removal in the raw coke oven gas reforming unit 2, then is pressurized by the pressurizing device 4, most of the reducing gas is sent to the desulfurization unit 5, and is desulfurized after being further cooled in the desulfurization unit 5. A small part of the gas is further pressurized by a compressor 3 to form high-pressure reducing gas which returns to the coke oven unit 1;
5) in the coke oven unit 1, when a certain coking chamber finishes coke pushing and coal charging starts, the control valve 7 is opened. The high-pressure reducing gas pressurized by the compressor 3 is injected downwards from the upper part of the bridge pipe 12 through the high-pressure reducing gas nozzle 6; when the coal charging operation of the corresponding carbonization chamber is finished, the furnace door of the carbonization chamber is closed, and the control valve 7 is closed at the same time.
[ example 2 ]
As shown in fig. 2, in this embodiment, a gas leading-out system in a coal charging process of a coke oven matched with raw coke oven gas reforming includes a coke oven unit, a raw coke oven gas reforming unit, a compressor, a pressure boosting device, a desulfurization unit, a high-pressure reducing gas nozzle, and a control valve. The gas leading-out process in the coal charging process of the coke oven is basically the same as that in the embodiment 1, and the difference is the step 4), specifically: the reducing gas is subjected to waste heat recovery, temperature reduction and dust removal in the raw coke oven gas reforming unit 2, then is pressurized by the pressurizing device 4 and then is completely sent to the desulfurization unit 5, and is further cooled in the desulfurization unit 5 for desulfurization. A small part of desulfurized reducing gas is further pressurized by a compressor 3 to form high-pressure reducing gas which is returned to the coke oven unit 1.
[ example 3 ]
As shown in fig. 3, in this embodiment, a gas leading-out system in a coal charging process of a coke oven matched with raw coke oven gas reforming includes a coke oven unit, a raw coke oven gas reforming unit, a compressor, a supercharging device, a desulfurization unit, a high-pressure reducing gas nozzle, and a control valve. The gas leading-out process in the coal charging process of the coke oven is basically the same as that in the embodiment 1, and the difference is the step 4), specifically: the reducing gas is subjected to waste heat recovery, temperature reduction and dust removal in the raw coke oven gas reforming unit 2, then is pressurized by the pressurizing device 4, most of the reducing gas is sent to the high-pressure desulfurization unit 5 ', is further cooled and desulfurized in the high-pressure desulfurization unit 5', and a small part of the high-pressure reducing gas directly returns to the coke oven unit 1.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (3)
1. A coke oven coal charging process gas export system matched with crude gas reforming is characterized by comprising a coke oven unit, a crude gas reforming unit, a compressor, a supercharging device, a desulfurization unit, a high-pressure reducing gas nozzle and a control valve; the gas collecting pipe of the coke oven unit is connected with the crude gas reforming unit through a crude gas pipeline, the crude gas reforming unit is sequentially connected with the supercharging device and the desulfurization unit through a reducing gas pipeline, the reducing gas pipeline at the downstream of the supercharging device or the downstream of the desulfurization unit is sequentially connected with the compressor and the high-pressure reducing gas nozzle arranged at the upper part of the middle bridge pipe of the coke oven unit through a reducing gas branch pipeline, and the reducing gas branch pipeline at the upstream of the high-pressure reducing gas nozzle is provided with a control valve.
2. The coke oven coal charging process gas export system matched with raw coke oven gas reforming as claimed in claim 1, wherein the desulfurization unit is replaced by a high-pressure desulfurization unit without a compressor and a reducing gas branch pipeline; the gas collecting pipe of the coke oven unit is connected with the raw gas reforming unit through a raw gas pipeline, and the raw gas reforming unit is sequentially connected with the supercharging device and the high-pressure desulfurization unit through a reducing gas pipeline; the reducing gas pipeline at the downstream of the supercharging device is connected with a high-pressure reducing gas nozzle arranged at the upper part of a bridge pipe in the coke oven unit through a high-pressure reducing gas pipeline, and a control valve is arranged on the high-pressure reducing gas pipeline at the upstream of the high-pressure reducing gas nozzle.
3. The coke oven coal charging process gas discharge system matched with crude gas reforming as claimed in claim 1 or 2, wherein an included angle between a central line of the high-pressure reducing gas nozzle and a flow direction of crude gas at the lower section of the bridge pipe is not more than 20 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220732486.8U CN217230609U (en) | 2022-03-31 | 2022-03-31 | Coke oven coal charging process gas export system matched with raw coke oven gas reforming |
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| CN202220732486.8U CN217230609U (en) | 2022-03-31 | 2022-03-31 | Coke oven coal charging process gas export system matched with raw coke oven gas reforming |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114774138A (en) * | 2022-03-31 | 2022-07-22 | 中冶焦耐(大连)工程技术有限公司 | Coke oven coal charging process gas export process and system matched with raw coke oven gas reforming |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114774138A (en) * | 2022-03-31 | 2022-07-22 | 中冶焦耐(大连)工程技术有限公司 | Coke oven coal charging process gas export process and system matched with raw coke oven gas reforming |
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