CN219572720U

CN219572720U - Sulfur recovery shutdown hot nitrogen sulfur blowing device

Info

Publication number: CN219572720U
Application number: CN202320637009.8U
Authority: CN
Inventors: 林亚祥; 王同斌; 刘付华; 刘维国; 李斌; 高攀龙
Original assignee: CNOOC Ningbo Daxie Petrochemical Co Ltd
Current assignee: CNOOC Ningbo Daxie Petrochemical Co Ltd
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-08-22
Anticipated expiration: 2033-03-28

Abstract

The utility model relates to a sulfur recovery shutdown hot nitrogen blowing device, which comprises a sulfur making furnace, wherein the rear part of the sulfur making furnace is connected with a first-stage condenser, the front part of the sulfur making furnace is a nitrogen blowing pipeline, a condensing pipeline is arranged between the sulfur making furnace and the first-stage condenser, the hot nitrogen blowing device also comprises a hot nitrogen pipeline, two ends of the hot nitrogen pipeline are separated, one end of the hot nitrogen pipeline is connected to the nitrogen blowing pipeline at the front part of the sulfur making furnace, and the other end of the hot nitrogen pipeline is connected to the condensing pipeline at the rear part of the sulfur making furnace. The hot nitrogen line at the rear part of the sulfur making furnace controls the sulfur blowing progress and effect of a rear system, and simultaneously plays a role in inhibiting the temperature rise during the passivation of the catalyst.

Description

Sulfur recovery shutdown hot nitrogen sulfur blowing device

Technical Field

The utility model relates to the technical field of chemical production, in particular to a hot nitrogen blowing device for sulfur recovery shutdown.

Background

The new standard issued by China (emission Standard of Industrial pollutants for Petroleum refining) (GB 31570-2015) requires that the SO2 emission limit value of a sulfur device is less than 100mg/Nm3, and the problem that the SO2 emission index exceeds the standard exists under the conditions that the upstream production of the sulfur recovery device fluctuates and the acid gas quantity changes and the device stops working in the process. In the shutdown process, the temperature of the catalyst bed layer is raised in both the process of gas sulfur blowing and the process of acid gas complete combustion sulfur blowing.

Disclosure of Invention

In order to solve the technical defects in the prior art, the utility model provides a hot nitrogen blowing device for sulfur recovery shutdown.

The technical scheme adopted by the utility model is as follows: the utility model provides a sulphur is retrieved and is shut down hot nitrogen and blows sulphur device, includes the sulfur making stove, the rear portion of sulfur making stove be connected with one-level condenser, the front portion of sulfur making stove be nitrogen gas and sweep the pipeline, sulfur making stove and one-level condenser between be the condensing line, hot nitrogen blow sulphur device still including hot nitrogen gas pipeline, hot nitrogen gas pipeline branch both ends, hot nitrogen gas pipeline's one end connect on the nitrogen gas of sulfur making stove front portion sweeps the pipeline, the other end connects on the condensing line of sulfur making stove rear portion.

And an electric heater for heating nitrogen is also arranged on the hot nitrogen pipeline.

And the two ends of the hot nitrogen pipeline connected to the nitrogen purging pipeline and the condensing pipeline are respectively provided with a control valve.

One end of the hot nitrogen pipeline connected to the front part of the sulfur making furnace controls the cooling speed of the sulfur making furnace and sweeps hearth gas, and the other end of the hot nitrogen pipeline connected to the rear part of the sulfur making furnace controls the sulfur blowing progress and effect of a rear system and simultaneously plays a role in inhibiting the temperature rise during the passivation of the catalyst.

The beneficial effects of the utility model are as follows: the utility model provides a sulfur recovery shutdown hot nitrogen sulfur blowing device, which comprises a sulfur making furnace, wherein the rear part of the sulfur making furnace is connected with a first-stage condenser, the front part of the sulfur making furnace is provided with a nitrogen purging pipeline, a condensing pipeline is arranged between the sulfur making furnace and the first-stage condenser, the hot nitrogen sulfur blowing device also comprises a hot nitrogen pipeline, the hot nitrogen pipeline is separated from two ends, one end of the hot nitrogen pipeline is connected to the nitrogen purging pipeline at the front part of the sulfur making furnace, and the other end of the hot nitrogen pipeline is connected to the condensing pipeline at the rear part of the sulfur making furnace. The hot nitrogen line at the rear part of the sulfur making furnace controls the sulfur blowing progress and effect of a rear system, and simultaneously plays a role in inhibiting the temperature rise during the passivation of the catalyst.

Drawings

Fig. 1 is a schematic diagram of the structure of the present utility model.

Wherein, 1-sulfur producing furnace, 2-first stage condenser, 3-nitrogen purge line, 4-condensing line, 5-hot nitrogen line.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the utility model, are within the scope of the utility model based on the embodiments of the utility model.

The utility model provides a sulphur is retrieved and is shut down hot nitrogen and blows sulphur device, includes sulfur making stove 1, its characterized in that, the rear portion of sulfur making stove 1 be connected with one-level condenser 2, the front portion of sulfur making stove 1 be nitrogen gas and sweep pipeline 3, sulfur making stove 1 and one-level condenser 2 between be condensing line 4, hot nitrogen blow sulphur device still including hot nitrogen gas pipeline 5, hot nitrogen gas pipeline 5 on still be equipped with the electric heater with nitrogen gas heating. The hot nitrogen pipeline 5 is divided into two ends, one end of the hot nitrogen pipeline 5 is connected to the nitrogen purging pipeline 3 at the front part of the sulfur producing furnace 1, and the other end is connected to the condensing pipeline 4 at the rear part of the sulfur producing furnace 1. One end of the hot nitrogen pipeline 5 connected to the front part of the sulfur producing furnace 1 controls the cooling speed of the sulfur producing furnace 1 and sweeps the furnace gas, and the other end of the hot nitrogen pipeline 5 connected to the rear part of the sulfur producing furnace 1 controls the sulfur blowing progress and effect of a rear system and simultaneously plays a role in inhibiting the temperature rise during the passivation of the catalyst. The utility model adopts an electric heater to heat nitrogen to 300 ℃, one path of hot nitrogen is connected to a nitrogen purging pipeline of a furnace end of a sulfur-making furnace, and the other path of hot nitrogen is connected to a pipeline of a primary condenser at the rear part of the sulfur-making furnace, and the furnace end of the sulfur-making furnace controls the cooling speed of the sulfur-making furnace and purges furnace gas. The hot nitrogen line at the rear part of the sulfur making furnace controls the sulfur blowing progress and effect of a rear system, and simultaneously plays a role in inhibiting the temperature rise during the passivation of the catalyst.

And the two ends of the hot nitrogen pipeline 5 connected to the nitrogen purging pipeline 3 and the condensing pipeline 4 are respectively provided with a control valve.

The method has no side reaction during hot nitrogen sulfur blowing, no other influence on the system and the sulfur blowing effect, small gas quantity during sulfur blowing, and large reaction temperature rise controllability in the hydrogenation reactor; heating nitrogen by an electric heater, purging residual sulfur in the sulfur production system by the hot nitrogen, preparing a proper amount of industrial air, and passivating the system. Residual H2S in the system, SO2 generated by passivation and balanced saturated sulfur vapor in the purge gas are treated by a hypergravity desulfurization system, and then the chimney is discharged after reaching standards; the hot nitrogen is used for blowing sulfur, so that chemical reaction with the sulfur production system process gas and sulfur is not easy to occur, the process operation is easy to control, and the safety problems of standard discharge of the whole process flue gas in the device shutdown period and over-temperature of the system in the passivation period are thoroughly realized; the shutdown hot nitrogen sulfur blowing process of the sulfur device thoroughly realizes the whole process of flue gas purification and standard emission during the shutdown period of the device.

The skilled person will know: while the utility model has been described in terms of the foregoing embodiments, the inventive concepts are not limited to the utility model, and any modifications that use the inventive concepts are intended to be within the scope of the appended claims.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. The utility model provides a sulfur recovery shutdown hot nitrogen blows sulphur device, includes sulfur making stove (1), its characterized in that, the rear portion of sulfur making stove (1) be connected with one-level condenser (2), the front portion of sulfur making stove (1) be nitrogen gas and sweep pipeline (3), sulfur making stove (1) and one-level condenser (2) between be condensing line (4), hot nitrogen blow sulphur device still including hot nitrogen gas pipeline (5), hot nitrogen gas pipeline (5) divide out both ends, one end of hot nitrogen gas pipeline (5) connect on nitrogen gas sweep pipeline (3) of sulfur making stove (1) front portion, the other end connects on condensing line (4) of sulfur making stove (1) rear portion.

2. The device for blowing sulfur by hot nitrogen in shutdown for sulfur recovery according to claim 1, wherein an electric heater for heating nitrogen is further arranged on the hot nitrogen pipeline (5).

3. The sulfur recovery shutdown hot nitrogen blowing device according to claim 1, wherein the two ends of the hot nitrogen pipeline (5) connected to the nitrogen purging pipeline (3) and the condensing pipeline (4) are respectively provided with control valves.

4. A sulfur recovery shutdown hot nitrogen sulfur blowing apparatus according to claim 1, wherein one end of the hot nitrogen line (5) connected to the front of the sulfur producing furnace (1) controls the cooling rate of the sulfur producing furnace (1) and sweeps the furnace gas, and the other end of the hot nitrogen line (5) connected to the rear of the sulfur producing furnace (1) controls the sulfur blowing progress and effect of the back system while suppressing the temperature rise during the catalyst deactivation.