阅读说明：本技术 油品脱硫装置、油品加氢系统以及油品脱硫方法 (Oil product desulfurization device, oil product hydrogenation system and oil product desulfurization method ) 是由 王建军 谢国群 吴旭波 王敬东 王建伟 于 2020-04-03 设计创作，主要内容包括：本发明涉及石油加工技术领域,公开了一种油品脱硫装置、油品加氢系统以及油品脱硫方法,所述油品脱硫装置(1)包括：脱硫塔(10),所述脱硫塔(10)具有供含有硫化氢的烃类气体进入的进气口和供洗涤所述气体中的硫化氢的洗涤液进入的洗涤液进口,所述脱硫塔(10)上开设有供在洗涤后的洗涤液的上层漂浮的烃液排出的排油口；以及分离件,所述分离件设置为能够接收由所述脱硫塔(10)的所述排油口排出的烃液并使得所述烃液中的烃和洗涤液进行分层,最终将所述烃液中的烃和洗涤液分别排出。该油品脱硫装置能够使得洗涤后的洗涤液的上层漂浮的烃液进行分层以将所述烃液中的烃和洗涤液进行分离。(The invention relates to the technical field of petroleum processing, and discloses an oil product desulfurization device, an oil product hydrogenation system and an oil product desulfurization method, wherein the oil product desulfurization device (1) comprises: the desulfurization tower (10) is provided with an air inlet for hydrocarbon gas containing hydrogen sulfide to enter and a washing liquid inlet for washing liquid of the hydrogen sulfide in the gas to enter, and the desulfurization tower (10) is provided with an oil discharge port for discharging the hydrocarbon liquid floating on the upper layer of the washed washing liquid; and a separator configured to receive the hydrocarbon liquid discharged from the oil discharge port of the desulfurization tower (10), stratify the hydrocarbons and the scrubbing liquid in the hydrocarbon liquid, and finally discharge the hydrocarbons and the scrubbing liquid, respectively, in the hydrocarbon liquid. The oil product desulfurization device can enable the upper-layer floating hydrocarbon liquid of the washed washing liquid to be layered so as to separate the hydrocarbon in the hydrocarbon liquid from the washing liquid.)

1. An oil product desulfurization device, characterized in that, oil product desulfurization device (1) includes:

the desulfurization tower (10) is provided with an air inlet for hydrocarbon gas containing hydrogen sulfide to enter and a washing liquid inlet for washing liquid of the hydrogen sulfide in the hydrocarbon gas to enter, and the desulfurization tower (10) is provided with an oil discharge port for discharging the hydrocarbon liquid floating on the upper layer of the washed washing liquid; and

a separator configured to receive the hydrocarbon liquid discharged from the oil discharge port of the desulfurization tower (10) and to stratify the hydrocarbons and the scrubbing liquid in the hydrocarbon liquid, and finally to discharge the hydrocarbons and the scrubbing liquid, respectively, in the hydrocarbon liquid.

2. An oil product desulphurization device according to claim 1, wherein the separator comprises a separation tank (12), the separation tank (12) has a separation chamber (120) capable of containing the hydrocarbon liquid, the separation chamber (120) has a separation tank liquid inlet for the hydrocarbon liquid to enter, and a hydrocarbon discharge port and a scrubbing liquid discharge port for discharging the still stratified hydrocarbon and scrubbing liquid respectively.

3. An oil product desulfurization apparatus according to claim 2, characterized in that the separator tank (12) is provided with a separator tank vent through which the hydrocarbon gas introduced into the separator tank (12) can be discharged.

4. An oil product desulfurization apparatus according to claim 2, characterized in that the desulfurization tower (10) has a liquid discharge port for discharging the scrubbing liquid located in the lower layer after scrubbing the hydrocarbon gas;

the oil product desulfurization device (1) comprises a flash tank (14), wherein the flash tank (14) is provided with a flash liquid inlet communicated with the liquid outlet and the washing liquid outlet and a flash liquid outlet for discharging the washing liquid after flash evaporation, and the flash tank (14) is arranged to be capable of flash evaporating the hydrocarbon dissolved in the washing liquid.

5. An oil product desulphurization device according to claim 4, characterized in that the oil product desulphurization device (1) comprises a filter (16), the filter (16) having a filter inlet communicating with the liquid discharge port and the scrubbing liquid discharge port and a filter outlet for discharging the filtered scrubbing liquid to the flash tank (14), the filter (16) being arranged to filter out solid particles in the scrubbing liquid.

6. An oil product hydrogenation system, characterized in that the oil product hydrogenation system is provided with an oil product desulphurization device (1) according to any one of claims 1-5.

7. A method for desulfurizing an oil product, comprising:

step S10, washing the hydrocarbon gas containing hydrogen sulfide;

and step S20, separating out the hydrocarbon liquid floating on the upper layer of the washing liquid after washing the hydrocarbon gas, and allowing the hydrocarbon liquid to stand for layering so as to separate the hydrocarbon in the hydrocarbon liquid from the washing liquid.

8. The oil desulfurization method of claim 7, characterized in that it comprises:

step S30, flashing the washing liquid located at the lower layer after washing the hydrocarbon gas in the step S10 and the washing liquid separated from the hydrocarbon liquid in the step S20 to separate the hydrocarbon dissolved in the washing liquid.

9. The oil desulfurization method of claim 8, characterized in that it comprises:

step S40, filtering solid particles in the washing liquid before flashing.

10. The oil product desulfurization method according to claim 8, characterized in that, in the step S20, the pressure is controlled to be not more than 0.3-0.6 MPa when standing for layering; and/or

In the step S30, the pressure during flashing is controlled to be 0.3-0.4 MPa.

Technical Field

The invention relates to the technical field of petroleum processing, in particular to an oil product desulfurization device, an oil product hydrogenation system and an oil product desulfurization method.

Background

The hydrogenation device is a processing device which must be configured for upgrading the quality of oil products, sulfur in the oil products can be removed in the process of upgrading the quality of the oil products, the sulfur is subjected to desulfurization reaction under the action of a catalyst in the hydrogenation device to generate hydrogen sulfide, the desulfurization reaction can be influenced due to the accumulation of the hydrogen sulfide to a certain degree, the quality of the oil products can be influenced, and corrosion to equipment and pipelines can be caused, so that a desulfurization tower is usually arranged in the hydrogenation device to remove the hydrogen sulfide.

Usually, a dimethyl diethanolamine solution (abbreviated as a lean solution) is used to purify a hydrocarbon gas containing hydrogen sulfide generated by a desulfurization reaction to remove hydrogen sulfide, the hydrogen sulfide is dissolved in the lean amine solution to form an amine-rich solution, and the amine-rich solution needs to be introduced into a solvent regeneration tower to be treated to regenerate the lean amine solution, so that recycling is realized. Since the gas introduced into the desulfurization tower may also contain a hydrocarbon layer such as methane and ethane, the upper layer of the amine-rich liquid inside the desulfurization tower may float the deposited hydrocarbon layer after the desulfurization tower is operated for a certain period of time, and thus the deposited hydrocarbon layer needs to be removed.

At present, the deposited hydrocarbon layer is mainly discharged into a flash tank for flash evaporation to remove the floating hydrocarbon layer, but the rich amine liquid is discharged into the flash tank while the hydrocarbon is discharged, and a large amount of hydrocarbon is discharged into the flash tank, so that the flash effect is poor, the hydrocarbon and the rich amine liquid cannot be effectively separated, and therefore the hydrocarbon easily enters the solvent regeneration tower along with the rich amine liquid, so that the liquid level fluctuation of the solvent regeneration tower is caused, and the regeneration treatment is influenced.

Disclosure of Invention

The invention aims to solve the problem that the separation effect of hydrocarbon and washing liquid floating in the upper layer of hydrocarbon liquid after hydrocarbon gas containing hydrogen sulfide is washed in the prior art is poor, and provides an oil product desulfurization device which can stratify the hydrocarbon liquid floating in the upper layer of the washing liquid after the hydrocarbon gas is washed so as to separate the hydrocarbon in the hydrocarbon liquid from the washing liquid.

In order to achieve the above object, an aspect of the present invention provides an oil product desulfurization apparatus including:

the desulfurization tower is provided with an air inlet for hydrocarbon gas containing hydrogen sulfide to enter and a washing liquid inlet for washing liquid of the hydrogen sulfide in the hydrocarbon gas to enter, and the desulfurization tower is provided with an oil discharge port for discharging the hydrocarbon liquid floating on the upper layer of the washed washing liquid; and

a separation member configured to receive the hydrocarbon liquid discharged from the oil discharge port of the desulfurization tower and to stratify the hydrocarbons and the scrubbing liquid in the hydrocarbon liquid, and finally to discharge the hydrocarbons and the scrubbing liquid in the hydrocarbon liquid, respectively.

In the above technical solution, by providing the separating member capable of receiving the hydrocarbon liquid discharged from the oil discharge port of the desulfurization tower and layering the hydrocarbon and the washing liquid in the hydrocarbon liquid, and finally discharging the hydrocarbon and the washing liquid in the hydrocarbon liquid respectively, the hydrocarbon liquid discharged from the oil discharge port can be layered to effectively separate the hydrocarbon and the washing liquid in the hydrocarbon liquid, and since the hydrocarbon and the washing liquid are effectively separated, the separated washing liquid can enter the solvent regeneration tower for more efficient regeneration treatment, and the influence of the hydrocarbon on the solvent regeneration tower is greatly reduced.

Preferably, the separation member comprises a separation tank, the separation tank is provided with a separation chamber capable of containing the hydrocarbon liquid, and the separation chamber is provided with a separation tank liquid inlet for the hydrocarbon liquid to enter, and a hydrocarbon discharge port and a washing liquid discharge port for discharging the standing layered hydrocarbon and the washing liquid respectively.

Preferably, the separator tank is provided with a separator tank vent through which the hydrocarbon gas entering the separator tank can be discharged.

Preferably, the desulfurization tower is provided with a liquid outlet for discharging the washed washing liquid;

the oil product desulfurization device comprises a flash tank, the flash tank is provided with a flash liquid inlet communicated with the liquid outlet and the washing liquid outlet and a flash liquid outlet for discharging the washing liquid after flash evaporation, and the flash tank is arranged to be capable of flash evaporating the hydrocarbon dissolved in the washing liquid.

Preferably, the oil product desulfurization device comprises a filter having a filter inlet communicating with the liquid discharge port and the scrubbing liquid discharge port and a filter outlet for discharging the filtered scrubbing liquid to the flash tank, the filter being configured to filter out solid particles in the scrubbing liquid.

The second aspect of the invention provides an oil product hydrogenation system, wherein the oil product desulfurization device provided by the invention is arranged in the oil product hydrogenation system. By arranging the oil product desulfurization device in the oil product hydrogenation system, the desulfurization efficiency and the desulfurization effect of the oil product hydrogenation system can be improved, and the oil product hydrogenation system can be safely and stably operated.

The third aspect of the present invention provides an oil product desulfurization method, comprising:

step S10, washing the hydrocarbon gas containing hydrogen sulfide;

and step S20, separating out the hydrocarbon liquid floating on the upper layer of the washing liquid after washing the hydrocarbon gas, and allowing the hydrocarbon liquid to stand for layering so as to separate the hydrocarbon in the hydrocarbon liquid from the washing liquid.

Preferably, the oil product desulfurization method comprises the following steps:

step S30, flashing the washing liquid located at the lower layer after washing the hydrocarbon gas in the step S10 and the washing liquid separated from the hydrocarbon liquid in the step S20 to separate the hydrocarbon dissolved in the washing liquid.

Preferably, the oil product desulfurization method comprises the following steps:

step S40, filtering solid particles in the washing liquid before flashing.

Preferably, in the step S20, when standing and layering, the pressure is controlled to be 0.3-0.6 MPa; and/or

In the step S30, the pressure during flashing is controlled to be 0.3-0.4 MPa.

Drawings

Fig. 1 is a schematic view of the overall configuration of an oil product desulfurization apparatus according to a preferred embodiment of the present invention.

Description of the reference numerals

1-an oil product desulfurization unit; 10-a desulfurization tower; 12-a separation tank; 120-a separation chamber; 14-a flash tank; 16-filter.

Detailed Description

In the present invention, the use of directional terms such as "upper, lower, left and right" generally means that the terms "inside and outside" refer to the inside and outside of the outline of the component in consideration of the orientation of the components in actual use and the drawings, unless otherwise specified.

The invention provides an oil product desulfurization device, an oil product desulfurization device 1 comprises a desulfurization tower 10, the desulfurization tower 10 is provided with an air inlet for hydrocarbon gas containing hydrogen sulfide and a washing liquid inlet for washing the washing liquid of the hydrogen sulfide in the hydrocarbon gas, wherein the air inlet is arranged below the washing liquid inlet, specifically, the air inlet can be arranged on the side wall of the desulfurization tower 10 and can be close to the bottom end of the desulfurization tower 10, the washing liquid inlet can be arranged on the side wall of the desulfurization tower 10 and can be close to the top end of the desulfurization tower 10, thereby realizing the countercurrent washing of the washing liquid on the hydrocarbon gas containing hydrogen sulfide, the washing liquid can be selected according to actual conditions, for example, when the hydrogen sulfide in the hydrocarbon gas needs to be washed, dimethyl diethanolamine solution can be introduced into the washing liquid inlet, the desulfurization tower 10 is provided with an oil discharge port for discharging the hydrocarbon liquid floating on the upper layer of the washed washing liquid, and the oil discharge port can be arranged at a preset distance from the bottom of the desulfurization tower 10, so that when the hydrocarbon floating on the upper layer of the washing liquid in the desulfurization tower 10 reaches the position of the oil discharge port, a valve can be opened to discharge the hydrocarbon floating on the upper layer, it should be noted that the washed washing liquid accumulates on the bottom of the desulfurization tower 10, the washing liquid is at a stable height in the desulfurization tower 10, when the hydrocarbon floating on the upper layer gradually increases to reach the oil discharge port, the hydrocarbon floating on the upper layer is discharged, and a certain amount of washing liquid is carried along with the washing liquid to form the hydrocarbon liquid, in addition, a liquid discharge port for discharging the washing liquid located on the lower layer after the hydrocarbon gas is washed is also arranged on the bottom of the desulfurization tower 10, that is, the washing liquid on the lower layer can be discharged through the liquid discharge port, and the hydrocarbon liquid in the upper layer can be discharged from the oil discharge port; the oil product desulfurization device 1 further includes a separation member configured to receive the hydrocarbon liquid discharged from the oil discharge port of the desulfurization tower 10, stratify the hydrocarbons and the scrubbing liquid in the hydrocarbon liquid, and finally discharge the hydrocarbons and the scrubbing liquid in the hydrocarbon liquid, respectively. By providing the separating member capable of receiving the hydrocarbon liquid discharged from the oil discharge port of the desulfurization tower 10 and layering the hydrocarbon and the washing liquid in the hydrocarbon liquid, and finally discharging the hydrocarbon and the washing liquid in the hydrocarbon liquid respectively, the hydrocarbon liquid discharged from the oil discharge port can be layered to effectively separate the hydrocarbon and the washing liquid in the hydrocarbon liquid, and since the hydrocarbon and the washing liquid are effectively separated, the separated washing liquid can enter the solvent regeneration tower for more efficient regeneration treatment, and the influence of the hydrocarbon on the solvent regeneration tower is greatly reduced.

As shown in fig. 1, the separation member may include a separation tank 12, the separation tank 12 may have a separation chamber 120 capable of accommodating the hydrocarbon liquid, the separation chamber 120 may have a separation tank liquid inlet for the hydrocarbon liquid to enter, that is, a separation tank liquid inlet for the hydrocarbon liquid discharged from the oil discharge port to enter may be formed in a tank wall of the separation tank 12, the separation tank liquid inlet may be communicated with the oil discharge port, and after the hydrocarbon liquid enters the separation chamber 120, the separation tank is subjected to standing and layering, wherein a lower layer is a washing liquid and an upper layer is hydrocarbons, and it is noted that, in order to improve separation efficiency, the hydrocarbon liquid discharged into the separation chamber 120 multiple times may be subjected to uniform standing and layering; the separation chamber 120 may have a hydrocarbon discharge port and a washing liquid discharge port for discharging the hydrocarbon and the washing liquid after standing and layering, respectively, that is, the hydrocarbon discharge port and the washing liquid discharge port may be opened on the tank wall of the separation tank 12, wherein: the wash liquid outlet may be open to the bottom of the separator tank 12 and the hydrocarbon outlet may be open to the side wall of the separator tank 12. It will be appreciated that as the level of scrubbing liquid drops as scrubbing liquid is drained, hydrocarbons may reach and be drained from the hydrocarbon drain.

It will be appreciated that as the hydrocarbon liquid is discharged into the separator tank 12, hydrocarbon gas will also enter the separator tank 12, and a separator tank vent may be provided in the separator tank 12 through which hydrocarbon gas entering the separator tank 12 can be discharged, i.e. the separation chamber 120 may be provided with the separator tank vent, which may be provided at the top of the separator tank 12. The hydrocarbon gas is appropriately discharged from the separator 12 so that the pressure in the separator 12 can be maintained within a predetermined range, for example, the pressure in the separator 12 can be maintained at 0.3 to 0.6MPa, thereby allowing the hydrocarbon and the washing liquid to be more favorably separated. The discharged hydrocarbon gas can enter a low-pressure gas pipeline.

In order to further remove the hydrocarbon dissolved in the washing liquid, the oil product desulfurization device 1 may include a flash tank 14, the flash tank 14 has a flash liquid inlet communicated with the liquid outlet and the washing liquid outlet, and a flash liquid outlet for discharging the flashed washing liquid, and the flash tank 14 is configured to flash off the hydrocarbon dissolved in the washing liquid, so that the hydrocarbon can be further removed, thereby facilitating the regeneration treatment of the washing liquid by the solvent regeneration tower and simultaneously reducing the influence of the hydrocarbon on the solvent regeneration tower. In addition, a flash exhaust port through which gas such as flash vapor can be exhausted may be provided in the flash tank 14, so that the pressure in the flash tank 14 may be maintained within a certain range, for example, 0.3 to 0.4MPa, thereby improving the flash effect.

As shown in fig. 1, the oil product desulfurization device 1 may include a filter 16, the filter 16 may have a filter inlet communicating with the liquid discharge port and the scrubbing liquid discharge port, and a filter outlet for discharging the filtered scrubbing liquid to the flash tank 14, it being understood that the scrubbing liquid discharged from the liquid discharge port and the scrubbing liquid discharge port may first enter the filter 16, then be filtered, and then be discharged from the filter outlet to the flash tank 14, and the filter 16 may be configured to filter out solid particles in the scrubbing liquid.

The invention also provides an oil product hydrogenation system, wherein the oil product hydrogenation system is provided with the oil product desulfurization device 1 provided by the invention. By arranging the oil product desulfurization device 1 provided by the invention in the oil product hydrogenation system, the desulfurization efficiency and the desulfurization effect of the oil product hydrogenation system can be improved, and the oil product hydrogenation system can be safely and stably operated.

The invention also provides an oil product desulfurization method, preferably, the oil product desulfurization device 1 provided by the invention can be used for desulfurization of oil products, and the oil product desulfurization method comprises the following steps: step S10, washing the hydrocarbon gas containing hydrogen sulfide, wherein the hydrocarbon gas containing hydrogen sulfide can be introduced into the desulfurizing tower 10 to be washed by the washing liquid in a countercurrent manner; and step S20, separating the hydrocarbon liquid floating on the upper layer of the washing liquid after the hydrocarbon gas is washed, and allowing the hydrocarbon liquid to stand and stratify to separate the hydrocarbon in the hydrocarbon liquid from the washing liquid, wherein it can be understood that the upper layer of the washing liquid after the hydrocarbon gas is washed can float hydrocarbon, the hydrocarbon liquid is discharged due to carrying some washing liquid while the hydrocarbon is discharged, the hydrocarbon liquid can be discharged from the oil discharge port, the hydrocarbon liquid discharged from the desulfurization tower 10 can enter the separation tank 12 to be subjected to standing and stratifying, and therefore the hydrocarbon in the hydrocarbon liquid and the washing liquid can be effectively separated, wherein the hydrocarbon can be discharged from the hydrocarbon discharge port of the separation tank 12, and the washing liquid can be discharged from the washing liquid discharge port of the separation tank 12. The wash liquid in the lower layer after washing the hydrocarbon gas may be discharged from the liquid discharge port of the desulfurization tower 10.

In order to better separate the hydrocarbon in the hydrocarbon liquid from the washing liquid, in the step S20, when standing and layering, the pressure may be controlled to be 0.3 to 0.6 MPa; it is understood that the pressure in the separation tank 12 can be controlled to 0.3 to 0.6 MPa.

In addition, the oil product desulfurization method comprises the following steps: step S30, flashing the washing liquid located in the lower layer after washing the hydrocarbon gas in step S10 and the washing liquid separated from the hydrocarbon liquid in step S20 to separate the hydrocarbon dissolved in the washing liquid. That is, the washing liquid discharged from the liquid discharge port of the desulfurization tower 10 and the washing liquid discharged from the washing liquid discharge port of the separation tank 12 may be passed into the flash tank 14 to be flashed to remove hydrocarbons dissolved in the washing liquid.

The inventors have found that, in the step S30, the pressure at the time of flashing is controlled to be 0.3 to 0.4MPa, so that not only the hydrocarbons dissolved in the washing liquid can be flashed off, but also the flashed-off hydrocarbons can be discharged to downstream equipment.

The oil product desulfurization method comprises the following steps: step S40, filtering solid particles in the washing liquid before flashing. The washing liquid discharged from the liquid discharge port of the desulfurization tower 10 and the washing liquid discharged from the washing liquid discharge port of the separation tank 12 may be first introduced into the filter 16 to filter out solid particles in the washing liquid, and then the filtered washing liquid may be discharged into the flash tank 14 to be flashed.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.