CN217594588U - Special hydrogen recycling device for n-butane isomerization process - Google Patents
Special hydrogen recycling device for n-butane isomerization process Download PDFInfo
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- CN217594588U CN217594588U CN202221592517.0U CN202221592517U CN217594588U CN 217594588 U CN217594588 U CN 217594588U CN 202221592517 U CN202221592517 U CN 202221592517U CN 217594588 U CN217594588 U CN 217594588U
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Abstract
The utility model provides a hydrogen recycling device special for n-butane isomerization process, which comprises an isomerization reaction unit and a hydrogenation stabilizing unit; the system also comprises a fuel gas pipe network, wherein a pressure monitoring device is arranged on the fuel gas pipe network; also includes a PSA unit for performing hydrogen purification; the shell pass outlet of the upper end of the isomerization reaction heat exchanger is connected with a valve group B through a flowmeter II, one path of outlet of the valve group B is connected to the PSA unit through a valve VIII pipeline, and the other path of outlet of the valve group B is connected to the fuel gas pipe network through a valve IX pipeline; a shell pass outlet at the upper end of the hydrogenation reaction heat exchanger is connected with a valve group C through a flowmeter III, one path of outlet of the valve group C is connected to the fuel gas pipe network through a valve XI pipeline, and the other path of outlet of the valve group C is connected to the PSA unit through a valve XXVI pipeline; the utility model discloses can purify hydrogen-rich tail gas, be favorable to reducing the raw materials extravagant, reduction in production cost.
Description
Technical Field
The utility model relates to a chemical production device, concretely relates to n-butane isomerization technology device.
Background
In the prior art, an n-butane isomerization device hydrogenates and saturates olefins in a C-C four raw material into alkanes in a hydrogenation mode, so that the residual amount of the olefins in the C-C four raw material is the lowest, sulfur-containing compounds, nitrogen-containing compounds and chlorides in the raw material are converted into H2S, NH and HCL respectively, and the product passes through a stabilization tower to remove hydrogen components such as hydrogen and the like and is sent to a fuel gas pipe network. The isomerization reaction unit adopts a medium-temperature isomerization process to perform isomerization reaction under the condition of hydrogen, and the reaction product is sent to a stabilizing tower to remove the unstable components of the secondary hydrogen tail gas level and sent to a fuel gas pipe network. After treatment, the tail gas of the n-butane isomerization unit and the isomerization reaction unit is still rich in hydrogen, so that raw material waste is caused by direct combustion treatment, and the reduction of the production cost is not facilitated.
Disclosure of Invention
The utility model aims to solve the technical problem that a provide dedicated hydrogen recovery cyclic utilization device of n-butane isomerization technology can purify hydrogen-rich tail gas, is favorable to reducing the raw materials extravagant, reduction in production cost.
In order to solve the technical problem, the hydrogen recycling device special for the n-butane isomerization process comprises an isomerization reaction unit and a hydrogenation stabilizing unit; the isomerization reaction unit comprises an isomerization stabilizer reflux tank and an isomerization reaction heat exchanger, and the isomerization stabilizer reflux tank is connected to a shell pass inlet of the isomerization reaction heat exchanger through a pipeline; one path of a condensate outlet at the lower end of the isomerization reaction heat exchanger is connected to a reflux tank of the isomerization stabilizing tower through a valve I pipeline, and the other path of the condensate outlet is used for conveying the condensate pipeline to the C3/C4 separation tower through a valve II;
the hydrogenation stabilizing unit comprises a hydrogenation stabilizing tower reflux tank and a hydrogenation reaction heat exchanger, and the hydrogenation stabilizing tower reflux tank is connected to a shell pass inlet of the hydrogenation reaction heat exchanger through a pipeline; one path of a condensate outlet at the lower end of the hydrogenation heat exchanger is connected to a reflux tank of the hydrogenation stabilizing tower through a valve XVII pipeline, and the other path of the condensate outlet is used for conveying the condensate pipeline to the C3/C4 separation tower through a valve XVIII pipeline;
the system also comprises a fuel gas pipe network, wherein a pressure monitoring device is arranged on the fuel gas pipe network; the PSA unit comprises a flow meter I, a valve group A, a valve XXV and a PSA feeding buffer tank;
the shell pass outlet of the upper end of the isomerization reaction heat exchanger is connected with a valve group B through a flowmeter II, one path of outlet of the valve group B is connected to the PSA unit through a valve VIII pipeline, and the other path of outlet of the valve group B is connected to the fuel gas pipe network through a valve IX pipeline;
a shell pass outlet at the upper end of the hydrogenation reaction heat exchanger is connected with a valve group C through a flowmeter III, one path of outlet of the valve group C is connected to the fuel gas pipe network through a valve XI pipeline, and the other path of outlet of the valve group C is connected to the PSA unit through a valve XXVI pipeline;
the valve group A comprises a valve XIX, a valve XX and a valve XXI which are connected in series, and further comprises a valve XXII which is connected with the valve XIX, the valve XX and the valve XXI in parallel.
As another embodiment, the hydrogen recovery and recycling device special for the n-butane isomerization process comprises an isomerization reaction unit and a hydrogenation stabilizing unit; the isomerization reaction unit comprises an isomerization stabilizing tower reflux tank and an isomerization reaction heat exchanger, and the isomerization stabilizing tower reflux tank is connected to a shell pass inlet of the isomerization reaction heat exchanger through a pipeline; one path of a condensate outlet at the lower end of the isomerization reaction heat exchanger is connected to a reflux tank of the isomerization stabilizing tower through a valve I pipeline, and the other path of the condensate outlet is used for conveying the condensate pipeline to the C3/C4 separation tower through a valve II;
the hydrogenation stabilizing unit comprises a hydrogenation stabilizing tower reflux tank and a hydrogenation reaction heat exchanger, and the hydrogenation stabilizing tower reflux tank is connected to a shell pass inlet of the hydrogenation reaction heat exchanger through a pipeline; one path of a condensate outlet at the lower end of the hydrogenation heat exchanger is connected to a reflux tank of the hydrogenation stabilizing tower through a valve XVII pipeline, and the other path of the condensate outlet is used for conveying the condensate pipeline to the C3/C4 separation tower through a valve XVIII pipeline;
the system also comprises a fuel gas pipe network, wherein a pressure monitoring device is arranged on the fuel gas pipe network; the PSA unit comprises a flow meter I, a valve group A, a valve XXV and a PSA feeding buffer tank;
the shell pass outlet at the upper end of the isomerization reaction heat exchanger is connected with a valve group B through a flowmeter II, the valve group B comprises a valve IV, a valve V and a valve VI which are connected in series, and the valve group B also comprises a valve VII which is connected with the valve IV, the valve V and the valve VI in parallel; the outlet of the valve group B is connected to the PSA unit through a valve VIII pipeline, and the parallel pipeline of the valve group B is connected to the fuel gas pipe network through a valve IX pipeline;
the shell pass outlet of the upper end of the hydrogenation reaction heat exchanger is connected with a valve group C through a flow meter III, the valve group C comprises a valve XIII, a valve XII and a valve XXIII which are connected in series, and the valve XXIV is connected with the valve XIII, the valve XII and the valve XXIII in parallel; the outlet end of the valve group C is connected to the fuel gas pipe network through a valve XI pipeline, and the parallel pipeline of the valve group C is connected to the PSA unit through a valve XXVI pipeline.
The utility model has the advantages that: A. the tail gas generated after hydrogenation of the device is used as a main raw material, and the hydrogen is purified and then recycled, so that the waste of the raw material is reduced, and the chemical energy is saved. B. The regulation and control means are added, the tail gas destination flow is adjustable and controllable, and the production is safe and stable.
Drawings
Fig. 1 is a schematic structural diagram of the first embodiment.
Fig. 2 is a schematic structural diagram of the second embodiment.
Detailed Description
The following describes the embodiments of the present invention with reference to the accompanying drawings.
Example one
As can be seen from fig. 1, the hydrogen recycling device dedicated to the n-butane isomerization process of the present embodiment includes an isomerization reaction unit and a hydrogenation stabilization unit; the isomerization reaction unit comprises an isomerization stabilizer reflux tank (100) and an isomerization reaction heat exchanger (101), wherein the isomerization stabilizer reflux tank (100) is connected to a shell side inlet of the isomerization reaction heat exchanger (101) through a pipeline; one path of a condensate outlet at the lower end of the isomerization reaction heat exchanger (101) is connected to the isomerization stabilizing tower reflux tank (100) through a valve I (1) and the other path of the condensate outlet is used for conveying the condensate to the C3/C4 separation tower through a valve II (2);
the hydrogenation stabilizing unit comprises a hydrogenation stabilizing tower reflux tank (200) and a hydrogenation reaction heat exchanger (201), wherein the hydrogenation stabilizing tower reflux tank (200) is connected to a shell pass inlet of the hydrogenation reaction heat exchanger (201) through a pipeline; one path of a condensate outlet at the lower end of the hydrogenation heat exchanger (201) is connected to a reflux tank (200) of the hydrogenation stabilizer through a valve XVII (17) pipeline, and the other path of the condensate outlet is used for conveying the condensate to the C3/C4 separation tower through a valve XVIII (18) pipeline;
the system also comprises a fuel gas pipe network, wherein a pressure monitoring device is arranged on the fuel gas pipe network; the PSA unit comprises a flow meter I (10), a valve group A, a valve XXV (25) and a PSA feeding buffer tank;
the shell pass outlet of the upper end of the isomerization reaction heat exchanger (101) is connected with a valve group B through a flowmeter II (3), one path of outlet of the valve group B is connected to the PSA unit through a valve VIII (8) pipeline, and the other path of outlet of the valve group B is connected to the fuel gas pipe network through a valve IX (9) pipeline;
and a shell pass outlet at the upper end of the hydrogenation heat exchanger (201) is connected with a valve group C through a flowmeter III (16), one path of outlet of the valve group C is connected to the fuel gas pipe network through a valve XI pipeline, and the other path of outlet of the valve group C is connected to the PSA unit through a valve XXVI pipeline.
The valve group A comprises a valve XIX (19), a valve XX (20) and a valve XXI (21) which are connected in series, and further comprises a valve XXII (22) which is connected with the valve XIX (19), the valve XX (20) and the valve XXI (21) in parallel.
In the structure, a hydrogen-rich gas conveying pipeline is respectively laid on the isomerization reaction unit and the hydrogenation stabilizing unit to the PSA unit, and hydrogen is purified and then recycled. Meanwhile, the isomerization reaction unit and the hydrogenation stabilization unit are both connected to a fuel gas pipe network through pipelines, and byproducts can be directly used as fuels. A pressure monitoring device is arranged on the fuel gas pipe network, when the monitoring value is larger than a set threshold value, the consumption of the fuel gas pipe network is low, at the moment, a valve VIII (8) and a valve XXVI (26) are opened, a valve IX (9) and a valve XI (11) are closed, and the gas is completely conveyed to the PSA unit instead of being conveyed to the fuel gas pipe network; when the monitoring value is smaller than the set threshold value, the consumption of the fuel gas pipe network is large, the valve IX (9) and the valve XI (11) are opened at the moment, and the incoming gas is partially or completely shunted to the fuel gas pipe network.
The function of the device is as follows: A. the PSA unit can be used for realizing the recycling of the hydrogen-rich tail gas of the isomerization reaction unit and the hydrogenation stabilization unit, thereby being beneficial to reducing the production cost; B. tail gas goes to including fuel gas pipe network and PSA unit, through the cooperation between pressure monitoring device and the valve group, can realize the tail gas reposition of redundant personnel, and the flow is controllable, and production possesses great flexibility.
Example two
Because the hydrogen-rich tail gas has two sources and two directions, when one of the isomerization reaction unit and the hydrogenation stabilizing unit fluctuates, the supplied material of the PSA unit fluctuates, and at the moment, the regulation and the balance are carried out by the cooperation of the valve group B and the valve group C so as to ensure the stable production.
As can be seen from fig. 2, the hydrogen recycling device dedicated to the n-butane isomerization process of the present embodiment includes an isomerization reaction unit and a hydrogenation stabilization unit; the isomerization reaction unit comprises an isomerization stabilizer reflux tank (100) and an isomerization reaction heat exchanger (101), wherein the isomerization stabilizer reflux tank (100) is connected to a shell side inlet of the isomerization reaction heat exchanger (101) through a pipeline; one path of a condensate outlet at the lower end of the isomerization reaction heat exchanger (101) is connected to the isomerization stabilizing tower reflux tank (100) through a valve I (1) and the other path of the condensate outlet is used for conveying the condensate to the C3/C4 separation tower through a valve II (2);
the hydrogenation stabilizing unit comprises a hydrogenation stabilizing tower reflux tank (200) and a hydrogenation reaction heat exchanger (201), wherein the hydrogenation stabilizing tower reflux tank (200) is connected to a shell pass inlet of the hydrogenation reaction heat exchanger (201) through a pipeline; one path of a condensate outlet at the lower end of the hydrogenation heat exchanger (201) is connected to a reflux tank (200) of the hydrogenation stabilizer through a valve XVII (17) pipeline, and the other path of the condensate outlet is used for conveying the condensate to the C3/C4 separation tower through a valve XVIII (18) pipeline;
the system also comprises a fuel gas pipe network, wherein a pressure monitoring device is arranged on the fuel gas pipe network; the system also comprises a PSA unit for hydrogen purification, wherein the PSA unit comprises a flow meter I (10), a valve group A, a valve XXV (25) and a PSA feeding buffer tank;
the shell pass outlet of the upper end of the isomerization reaction heat exchanger (101) is connected with a valve group B through a flowmeter II (3), the valve group B comprises a valve IV (4), a valve V (5) and a valve VI (6) which are connected in series, and the isomerization reaction heat exchanger also comprises a valve VII (7) which is connected with the valve IV (4), the valve V (5) and the valve VI (6) in parallel; the outlet of the valve group B is connected to the PSA unit through a valve VIII (8) pipeline, and the parallel pipeline of the valve group B is connected to the fuel gas pipe network through a valve IX (9) pipeline;
the shell pass outlet of the upper end of the hydrogenation heat exchanger (201) is connected with a valve group C through a flowmeter III (16), the valve group C comprises a valve XIII (13), a valve XII (12) and a valve XXIII (23) which are connected in series, and the hydrogenation heat exchanger further comprises a valve XXIV (24) which is connected with the valve XIII (13), the valve XII (12) and the valve XXIII (23) in parallel. The outlet end of the valve group C is connected to the fuel gas pipe network through a valve XI pipeline, and the parallel pipeline of the valve group C is connected to the PSA unit through a valve XXVI (26) pipeline.
In the structure, the valve V (5) on the main channel of the valve group B and the valve XII (12) on the main channel of the valve group C are both arranged as flow regulating valves, parallel pipelines arranged on the valve group B and the valve group C are used as bypasses, the flow of the main channel can be regulated through the flow regulating valves, and when the flow of the main channel is increased or decreased, the flow of the bypasses reversely changes along with the flow of the main channel. The main channels of the valve group B and the valve group C are connected with the PSA unit, and the bypass is connected with a fuel gas pipe network. According to production requirements, the flow of the valve V (5) and the flow of the valve XII (12) can be adjusted, so that the flow control of the destination flow is realized; by adding a remote control means, the flow can be gradually and accurately controlled, so that stable production is ensured.
The present invention is not limited to the above embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essential scope thereof, and still fall into the protection scope of the present invention.
Claims (2)
1. A hydrogen recovery and cyclic utilization device special for a normal butane isomerization process comprises an isomerization reaction unit and a hydrogenation stabilization unit; the method is characterized in that: the isomerization reaction unit comprises an isomerization stabilizer reflux tank (100) and an isomerization reaction heat exchanger (101), wherein the isomerization stabilizer reflux tank (100) is connected to a shell side inlet of the isomerization reaction heat exchanger (101) through a pipeline; one path of a condensate outlet at the lower end of the isomerization reaction heat exchanger (101) is connected to an isomerization stabilizing tower reflux tank (100) through a valve I (1) and the other path of the condensate outlet is used for conveying the condensate to a C3/C4 separation tower through a valve II (2);
the hydrogenation stabilizing unit comprises a hydrogenation stabilizing tower reflux tank (200) and a hydrogenation reaction heat exchanger (201), wherein the hydrogenation stabilizing tower reflux tank (200) is connected to a shell side inlet of the hydrogenation reaction heat exchanger (201) through a pipeline; one path of a condensate outlet at the lower end of the hydrogenation heat exchanger (201) is connected to a reflux tank (200) of the hydrogenation stabilizer through a valve XVII (17) pipeline, and the other path of the condensate outlet is used for conveying the condensate to the C3/C4 separation tower through a valve XVIII (18) pipeline;
the system also comprises a fuel gas pipe network, wherein a pressure monitoring device is arranged on the fuel gas pipe network; the system also comprises a PSA unit for hydrogen purification, wherein the PSA unit comprises a flow meter I (10), a valve group A, a valve XXV (25) and a PSA feeding buffer tank;
the shell pass outlet of the upper end of the isomerization reaction heat exchanger (101) is connected with a valve group B through a flowmeter II (3), one path of outlet of the valve group B is connected to the PSA unit through a valve VIII (8) pipeline, and the other path of outlet of the valve group B is connected to the fuel gas pipe network through a valve IX (9) pipeline;
a shell pass outlet at the upper end of the hydrogenation heat exchanger (201) is connected with a valve group C through a flowmeter III (16), one path of an outlet of the valve group C is connected to the fuel gas pipe network through a valve XI pipeline, and the other path of the outlet of the valve group C is connected to the PSA unit through a valve XXVI pipeline;
the valve group A comprises a valve XIX (19), a valve XX (20) and a valve XXI (21) which are connected in series, and further comprises a valve XXII (22) which is connected with the valve XIX (19), the valve XX (20) and the valve XXI (21) in parallel.
2. A hydrogen recovery and cyclic utilization device special for a normal butane isomerization process comprises an isomerization reaction unit and a hydrogenation stabilization unit; the method is characterized in that: the isomerization reaction unit comprises an isomerization stabilizer reflux tank (100) and an isomerization reaction heat exchanger (101), wherein the isomerization stabilizer reflux tank (100) is connected to a shell side inlet of the isomerization reaction heat exchanger (101) through a pipeline; one path of a condensate outlet at the lower end of the isomerization reaction heat exchanger (101) is connected to the isomerization stabilizing tower reflux tank (100) through a valve I (1) and the other path of the condensate outlet is used for conveying the condensate to the C3/C4 separation tower through a valve II (2);
the hydrogenation stabilizing unit comprises a hydrogenation stabilizing tower reflux tank (200) and a hydrogenation reaction heat exchanger (201), wherein the hydrogenation stabilizing tower reflux tank (200) is connected to a shell side inlet of the hydrogenation reaction heat exchanger (201) through a pipeline; one path of a condensate outlet at the lower end of the hydrogenation heat exchanger (201) is connected to a reflux tank (200) of the hydrogenation stabilizer through a valve XVII (17) pipeline, and the other path of the condensate outlet is used for conveying the condensate to the C3/C4 separation tower through a valve XVIII (18) pipeline;
the system also comprises a fuel gas pipe network, wherein a pressure monitoring device is arranged on the fuel gas pipe network; the PSA unit comprises a flow meter I (10), a valve group A, a valve XXV (25) and a PSA feeding buffer tank;
the shell pass outlet of the upper end of the isomerization reaction heat exchanger (101) is connected with a valve group B through a flowmeter II (3), the valve group B comprises a valve IV (4), a valve V (5) and a valve VI (6) which are connected in series, and the isomerization reaction heat exchanger also comprises a valve VII (7) which is connected with the valve IV (4), the valve V (5) and the valve VI (6) in parallel; the outlet of the valve group B is connected to the PSA unit through a valve VIII (8) pipeline, and the parallel pipeline of the valve group B is connected to the fuel gas pipe network through a valve IX (9) pipeline;
the shell pass outlet of the upper end of the hydrogenation reaction heat exchanger (201) is connected with a valve group C through a flowmeter III (16), the valve group C comprises a valve XIII (13), a valve XII (12) and a valve XXIII (23) which are connected in series, and the valve XXIV (24) is connected with the valve XIII (13), the valve XII (12) and the valve XXIII (23) in parallel; the outlet end of the valve group C is connected to the fuel gas pipe network through a valve XI pipeline, and the parallel pipeline of the valve group C is connected to the PSA unit through a valve XXVI (26) pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221592517.0U CN217594588U (en) | 2022-06-24 | 2022-06-24 | Special hydrogen recycling device for n-butane isomerization process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221592517.0U CN217594588U (en) | 2022-06-24 | 2022-06-24 | Special hydrogen recycling device for n-butane isomerization process |
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