CN210237116U - Dry desulfurization system for synthetic ammonia coke oven gas - Google Patents
Dry desulfurization system for synthetic ammonia coke oven gas Download PDFInfo
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- CN210237116U CN210237116U CN201920858167.XU CN201920858167U CN210237116U CN 210237116 U CN210237116 U CN 210237116U CN 201920858167 U CN201920858167 U CN 201920858167U CN 210237116 U CN210237116 U CN 210237116U
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Abstract
The utility model discloses a synthetic ammonia coke-oven gas dry desulfurization system includes preheater, deoxidation groove, first smart desulfurization groove, second smart desulfurization groove, third smart desulfurization groove. In the initial stage, the coke oven gas is heated through the preheating furnace, the coke oven gas is deoxidized through the deoxidizing tank, then a proper path is selected according to the flow of the coke oven gas and the composition condition of sulfides, and the coke oven gas is desulfurized through the first fine desulfurizing tank, the second fine desulfurizing tank and the third fine desulfurizing tank, so that pure hydrogen is prepared. Meanwhile, by selecting a proper path, the desulfurization substances can be fully utilized, and the waste caused by replacement of the desulfurization substances is avoided.
Description
Technical Field
The utility model relates to a synthetic ammonia industry technical field especially relates to a synthetic ammonia coke oven gas dry desulfurization system.
Background
Coke oven gas is an important raw material in the ammonia synthesis industry, and the hydrogen contained in the coke oven gas can reach more than 55 percent according to monitoring. However, coke oven gas contains not only a large amount of hydrogen but also impurities such as coal tar, ammonia, sulfur, benzene, naphthalene, and the like. The coke oven gas in the prior art is firstly subjected to a rough stripping tower to remove impurities such as coal tar, sulfide, benzene, naphthalene and the like, and then is subjected to pressure swing adsorption after passing through a coke oven gas compressor to extract pure hydrogen. The extracted hydrogen also contains trace oxygen, which has a toxic effect on the synthetic ammonia catalyst and needs to be further deoxidized by a deoxidizing tank. And the raw material gas deoxidized by the deoxidizing tank is desulfurized by a fine desulfurizing device and then enters a subsequent link for treatment. After the prior art fine desulfurization equipment is operated for a period of time, the desulfurization substances in the fine desulfurization equipment need to be replaced, but many substances in the fine desulfurization equipment can be used, so that the substances are wasted. Meanwhile, the replacement process may stop production, thereby wasting time.
Disclosure of Invention
In view of the above, there is a need for a dry desulfurization system for synthetic ammonia coke oven gas, which can save resources and avoid production stoppage.
A dry desulfurization system for synthetic ammonia coke-oven gas comprises a preheating furnace, a deoxidizing tank, a first fine desulfurizing tank, a second fine desulfurizing tank and a third fine desulfurizing tank, wherein a heating coil is arranged in the preheating furnace, an external coke-oven gas pipeline is communicated with an air inlet of the heating coil, an air outlet of the heating coil is communicated with an air inlet of the deoxidizing tank through a pipeline, an air outlet of the deoxidizing tank is communicated with air inlets of the first fine desulfurizing tank and the second fine desulfurizing tank through pipelines so as to remove organic sulfur and inorganic sulfur in the coke-oven gas, a first air inlet valve is arranged at an air inlet of the first fine desulfurizing tank, a second air inlet valve is arranged at an air inlet of the second fine desulfurizing tank, air outlets of the first fine desulfurizing tank and the second fine desulfurizing tank are communicated with an air inlet of the third fine desulfurizing tank so as to remove inorganic sulfur in the coke-oven gas, a first air outlet valve is arranged at an air outlet of the first fine desulfurizing tank, a second air outlet valve is arranged at an air outlet of the second fine desulfurizing tank, a third air inlet valve is arranged at the air inlet of the third fine desulfurization tank, and a third air outlet valve is arranged at the air outlet of the third fine desulfurization tank.
Preferably, the gas outlet of the first fine desulfurization tank is also communicated with the gas inlet of the second fine desulfurization tank through a pipeline, and a fourth gas outlet valve is arranged on the pipeline to control the coke-oven gas to enter the second fine desulfurization tank from the first fine desulfurization tank; and the gas outlet of the second fine desulfurization tank is communicated with the gas inlet of the first fine desulfurization tank through a pipeline, and a fifth gas outlet valve is arranged on the pipeline so as to control the coke-oven gas to enter the first fine desulfurization tank from the second fine desulfurization tank.
Preferably, the dry desulfurization system for the synthetic ammonia coke-oven gas further comprises a control device, wherein the control device comprises a controller and a gas flowmeter, the controller is electrically connected with the first air inlet valve, the second air inlet valve, the first air outlet valve, the second air outlet valve, the third air inlet valve, the third air outlet valve, the fourth air outlet valve and the fifth air outlet valve, the gas flowmeter is arranged at an air outlet of the heating coil of the preheating furnace to collect the flow information of the coke-oven gas, and the gas flowmeter is electrically connected with the controller to transmit the collected flow information to the controller.
Has the advantages that: the utility model discloses a synthetic ammonia coke-oven gas dry desulfurization system includes preheater, deoxidation groove, first smart desulfurization groove, second smart desulfurization groove, third smart desulfurization groove. In the initial stage, the coke oven gas is heated through the preheating furnace, the coke oven gas is deoxidized through the deoxidizing tank, then a proper path is selected according to the flow of the coke oven gas and the composition condition of sulfides, and the coke oven gas is desulfurized through the first fine desulfurizing tank, the second fine desulfurizing tank and the third fine desulfurizing tank, so that pure hydrogen is prepared. Meanwhile, by selecting a proper path, the desulfurization substances can be fully utilized, and the waste caused by replacement of the desulfurization substances is avoided.
Drawings
FIG. 1 is a process flow diagram of the dry desulfurization system for synthetic ammonia coke oven gas.
In the figure: the device comprises a preheating furnace 10, a deoxidation tank 20, a first fine desulfurization tank 30, a first air inlet valve 301, a first air outlet valve 302, a fourth air outlet valve 303, a second fine desulfurization tank 40, a second air inlet valve 401, a second air outlet valve 402, a fifth air outlet valve 403, a third fine desulfurization tank 50, a third air inlet valve 501 and a third air outlet valve 502.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 1, a dry desulfurization system for synthetic ammonia coke oven gas comprises a preheating furnace 10, a deoxidizing tank 20, a first fine desulfurization tank 30, a second fine desulfurization tank 40, and a third fine desulfurization tank 50, wherein a heating coil is arranged in the preheating furnace 10, an external coke oven gas pipeline is communicated with an air inlet of the heating coil, an air outlet of the heating coil is communicated with an air inlet of the deoxidizing tank 20 through a pipeline, an air outlet of the deoxidizing tank 20 is communicated with air inlets of the first fine desulfurization tank 30 and the second fine desulfurization tank 40 through a pipeline to remove organic sulfur and inorganic sulfur in the coke oven gas, a first air inlet valve 301 is arranged at the air inlet of the first fine desulfurization tank 30, a second air inlet valve 401 is arranged at the air inlet of the second fine desulfurization tank 40, air outlets of the first fine desulfurization tank 30 and the second fine desulfurization tank 40 are communicated with an air inlet of the third fine desulfurization tank 50 to remove inorganic sulfur in the coke oven gas, a first air outlet valve 302 is arranged at the air outlet of the first fine desulfurization tank 30, a second air outlet valve 402 is arranged at the air outlet of the second fine desulfurization tank 40, a third air inlet valve 501 is arranged at the air inlet of the third fine desulfurization tank 50, and a third air outlet valve 502 is arranged at the air outlet of the third fine desulfurization tank 50.
Further, the gas outlet of the first fine desulfurization tank 30 is communicated with the gas inlet of the second fine desulfurization tank 40 through a pipeline, and a fourth gas outlet valve 303 is arranged on the pipeline to control the coke-oven gas to enter the second fine desulfurization tank 40 from the first fine desulfurization tank 30; the gas outlet of the second fine desulfurization tank 40 is communicated with the gas inlet of the first fine desulfurization tank 30 through a pipeline, and a fifth gas outlet valve 403 is arranged on the pipeline to control the coke-oven gas to enter the first fine desulfurization tank 30 from the second fine desulfurization tank 40.
The temperature of the coke oven gas after the pressure swing adsorption of the compressor is lower for the catalyst in the deoxidation tank 20, but the reaction temperature of the deoxidation tank 20 is higher, and the preheating furnace 10 can increase the temperature of the coke oven gas, thereby being beneficial to removing oxygen in the deoxidation tank 20. After oxygen is removed from the coke oven gas, the coke oven gas is desulfurized through the first fine desulfurization tank 30, the second fine desulfurization tank 40 and the third fine desulfurization tank 50. The first and second fine desulfurization tanks 30 and 40 are filled with a cobalt molybdenum hydrodesulfurization catalyst capable of converting organic sulfur into inorganic sulfur. Zinc oxide is put into the third fine desulfurization tank 50 to remove inorganic sulfur.
When the first fine desulfurization tank 30 and the second fine desulfurization tank 40 have a relatively rich desulfurization material, the air intake valve of one of the fine desulfurization tanks may be selectively opened, and the desulfurized material enters the third fine desulfurization tank 50 for desulfurization. When one of the first fine desulfurization tank 30 or the second fine desulfurization tank 40 is insufficient in desulfurization material, the first fine desulfurization tank 30 and the second fine desulfurization tank 40 are connected in series, and the insufficient desulfurization material is consumed first, and when the desulfurization material is consumed completely, the material in the fine desulfurization tank is replaced. Thus, the desulfurization substance can be sufficiently used. Meanwhile, when the flow of the coke oven gas is large, the first fine desulfurization groove 30 and the second fine desulfurization groove 40 are connected in series, so that sulfides in the coke oven gas can be fully absorbed, and the hydrogen is purer.
Further, the dry desulfurization system for the synthetic ammonia coke-oven gas further comprises a control device, wherein the control device comprises a controller and a gas flowmeter, the controller is electrically connected with the first air inlet valve 301, the second air inlet valve 401, the first air outlet valve 302, the second air outlet valve 402, the third air inlet valve 501, the third air outlet valve 502, the fourth air outlet valve 303 and the fifth air outlet valve 403, the gas flowmeter is arranged at an air outlet of the heating coil of the preheating furnace 10 to collect the flow information of the coke-oven gas, and the gas flowmeter is electrically connected with the controller to transmit the collected flow information to the controller.
The controller can enable the first fine desulfurization tank 30, the second fine desulfurization tank 40 and the third fine desulfurization tank 50 to form different connection modes according to the flow information collected by the gas flowmeter and the content of the desulfurization substances in the first fine desulfurization tank 30 and the second fine desulfurization tank 40 through controlling each valve, for example, the first fine desulfurization tank 30, the second fine desulfurization tank 40 and the third fine desulfurization tank 50 are sequentially connected in series; the second fine desulfurization tank 40, the first fine desulfurization tank 30 and the third fine desulfurization tank 50 are connected in series in sequence; the first fine desulfurization tank 30 is connected in series with the third fine desulfurization tank 50; the second fine desulfurization tank 40 and the third fine desulfurization tank 50 are connected in series; the first fine desulfurization tank 30 is connected in parallel with the second fine desulfurization tank 40 and then connected in series with the third fine desulfurization tank 50, thereby adapting to different working condition environments and diversified desulfurization.
For example, a preferred embodiment is as follows: the controller is provided with a basic flow reference value, real-time flow information acquired by the gas flowmeter is transmitted to the controller, the controller generates a real-time flow value according to the real-time flow information, and when the real-time flow value is larger than the basic flow reference value, the controller opens the first air inlet valve 301, the third air inlet valve 501, the third air outlet valve 502 and the fourth air outlet valve 303, so that the first fine desulfurization tank 30, the second fine desulfurization tank 40 and the third fine desulfurization tank 50 are connected in series, and sulfides in the coke oven gas can be fully removed.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (3)
1. The dry desulfurization system for the synthetic ammonia coke oven gas is characterized in that: comprises a preheating furnace, a deoxidizing tank, a first fine desulfurizing tank, a second fine desulfurizing tank and a third fine desulfurizing tank, wherein a heating coil is arranged in the preheating furnace, an external coke-oven gas pipeline is communicated with an air inlet of the heating coil, an air outlet of the heating coil is communicated with an air inlet of the deoxidizing tank through a pipeline, an air outlet of the deoxidizing tank is communicated with air inlets of the first fine desulfurizing tank and the second fine desulfurizing tank through pipelines so as to remove organic sulfur and inorganic sulfur in the coke-oven gas, a first air inlet valve is arranged at an air inlet of the first fine desulfurizing tank, a second air inlet valve is arranged at an air inlet of the second fine desulfurizing tank, air outlets of the first fine desulfurizing tank and the second fine desulfurizing tank are communicated with an air inlet of the third fine desulfurizing tank so as to remove inorganic sulfur in the coke-oven gas, a first air outlet valve is arranged at an air outlet of the first fine desulfurizing tank, a second air outlet valve is arranged at an air outlet of the second fine desulfurizing tank, and a third air inlet valve is arranged at an air inlet of the third fine, and a third gas outlet valve is arranged at the gas outlet of the third fine desulfurization tank.
2. The dry desulfurization system for synthetic ammonia coke oven gas of claim 1, characterized in that: the gas outlet of the first fine desulfurization tank is also communicated with the gas inlet of the second fine desulfurization tank through a pipeline, and a fourth gas outlet valve is arranged on the pipeline so as to control the coke-oven gas to enter the second fine desulfurization tank from the first fine desulfurization tank; and the gas outlet of the second fine desulfurization tank is communicated with the gas inlet of the first fine desulfurization tank through a pipeline, and a fifth gas outlet valve is arranged on the pipeline so as to control the coke-oven gas to enter the first fine desulfurization tank from the second fine desulfurization tank.
3. The dry desulfurization system for synthetic ammonia coke oven gas as defined in claim 2, wherein: the dry desulfurization system for the synthetic ammonia coke-oven gas further comprises a control device, wherein the control device comprises a controller and a gas flowmeter, the controller is electrically connected with the first air inlet valve, the second air inlet valve, the first air outlet valve, the second air outlet valve, the third air inlet valve, the third air outlet valve, the fourth air outlet valve and the fifth air outlet valve, the gas flowmeter is arranged at an air outlet of the heating coil of the preheating furnace to collect the flow information of the coke-oven gas, and the gas flowmeter is electrically connected with the controller to transmit the collected flow information to the controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920858167.XU CN210237116U (en) | 2019-06-06 | 2019-06-06 | Dry desulfurization system for synthetic ammonia coke oven gas |
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| CN201920858167.XU CN210237116U (en) | 2019-06-06 | 2019-06-06 | Dry desulfurization system for synthetic ammonia coke oven gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111320334A (en) * | 2020-04-02 | 2020-06-23 | 四川锦城佳禾生态环保科技有限公司 | Powder-removing coal washing process for coal mine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111320334A (en) * | 2020-04-02 | 2020-06-23 | 四川锦城佳禾生态环保科技有限公司 | Powder-removing coal washing process for coal mine |
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