阅读说明：本技术 溶剂再生塔在线排渣系统及工艺 (Online deslagging system and process for solvent regeneration tower ) 是由 吉祥 王闯 张亚东 于 2019-12-18 设计创作，主要内容包括：本发明涉及芳烃生产中抽提装置核心设备的排渣处理,具体是涉及溶剂再生塔在线排渣系统及工艺,包括：溶剂再生塔、溶剂回收塔、溶剂进料线、汽提管线、蒸汽管线、排渣系统；溶剂再生塔一侧底部连接有溶剂进料线,位于溶剂进料线上部的溶剂再生塔的侧壁上及塔顶分别设有与溶剂回收塔连接的管线,溶剂再生塔顶部上设有气相阀门,与溶剂进料线相反方向的溶剂再生塔一侧侧壁底端设有蒸汽管线,溶剂再生塔底部通过管线连接有排渣系统,所述蒸汽管线一端端部连接至溶剂再生塔内,从蒸汽管线上引出分支管线连接在排渣系统的管线上；作业量小、可增加排渣频次降低对设备的长时间腐蚀。从而达到节约人工、工作机动方便、降低设备腐蚀接触时间的目的。(The invention relates to a slag discharge treatment of core equipment of an extraction device in aromatic hydrocarbon production, in particular to an online slag discharge system and a process of a solvent regeneration tower, which comprise the following steps: the system comprises a solvent regeneration tower, a solvent recovery tower, a solvent feed line, a steam stripping pipeline, a steam pipeline and a slag discharge system; the bottom of one side of the solvent regeneration tower is connected with a solvent feeding line, the side wall and the top of the solvent regeneration tower positioned at the upper part of the solvent feeding line are respectively provided with a pipeline connected with the solvent recovery tower, the top of the solvent regeneration tower is provided with a gas phase valve, the bottom of the side wall of one side of the solvent regeneration tower in the direction opposite to the solvent feeding line is provided with a steam pipeline, the bottom of the solvent regeneration tower is connected with a slag discharge system through a pipeline, one end part of the steam pipeline is connected into the solvent regeneration tower, and a branch pipeline is led out from the steam pipeline and connected to the pipeline; the workload is small, the deslagging frequency can be increased, and the long-time corrosion to equipment can be reduced. Thereby achieving the purposes of saving manpower, ensuring the maneuvering and convenience of the work and reducing the corrosion contact time of the equipment.)

1. Solvent regeneration tower online slag removal system, its characterized in that includes: the system comprises a solvent regeneration tower, a solvent recovery tower, a solvent feed line, a steam stripping pipeline, a steam pipeline and a slag discharge system; the bottom of one side of the solvent regeneration tower is connected with a solvent feeding line, a pipeline connected with the solvent recovery tower is arranged on the side wall of the solvent regeneration tower positioned on the upper part of the solvent feeding line and the top of the solvent regeneration tower respectively, a gas phase valve is arranged on the top of the solvent regeneration tower, a steam pipeline is arranged at the bottom end of the side wall of one side of the solvent regeneration tower opposite to the solvent feeding line, the bottom of the solvent regeneration tower is connected with a slag discharge system through a pipeline, one end of the steam pipeline is connected into the solvent regeneration tower, and a branch pipeline is led out from the steam pipeline and connected onto the.

2. The solvent regeneration tower online deslagging system of claim 1, wherein: a stop valve is arranged on the steam pipeline close to the solvent regeneration tower, an 8-shaped blind plate is arranged on the stop valve, and a check valve is arranged on the steam pipeline far away from the solvent regeneration tower; a stop valve and an 8-shaped blind plate are also respectively arranged on the branch pipelines led out from the steam pipeline; 1.0MPa steam is introduced into the steam pipeline.

3. The solvent regeneration tower online deslagging system of claim 1, wherein: the solvent feeding line is connected in parallel in the solvent regeneration tower, and an electric valve and a plunger valve are respectively arranged on the parallel pipelines.

4. The solvent regeneration tower online deslagging system of claim 1, wherein: the pipeline which is positioned on the side wall of the solvent regeneration tower and connected with the solvent recovery tower comprises parallel pipelines, one pipeline is provided with an angle valve, the other pipeline is provided with a plunger valve, and the two pipelines are converged and connected to the solvent recovery tower; and a stop valve is arranged on a pipeline which is positioned at the top of the solvent regeneration tower and connected with the solvent recovery tower.

5. The solvent regeneration tower on-line residue extraction system of any one of claims 1-4, wherein: a heat exchanger is arranged in the tower bottom, one end of the heat exchanger is connected to a steam pipeline arranged outside the solvent regeneration tower, and a stop valve is arranged on the steam pipeline; the other end of the heat exchanger is connected with a water condensing pipeline outside the regeneration tower, an isolation valve is arranged on the water condensing pipeline, and stop valves are respectively arranged on two sides of the isolation valve; a branch pipeline is also arranged on the condensate pipeline, and a plunger valve is arranged on the branch pipeline; 2.2MPa steam is introduced into the steam pipeline.

6. The solvent regeneration tower online deslagging system of claim 2, wherein: the slag discharging system comprises an impurity temporary storage tank, the top end of the impurity temporary storage tank is connected with the bottom end of the solvent regeneration tower through a pipeline, a butterfly valve, a ball valve and a double-gate valve are sequentially connected on the pipeline from the solvent regeneration tower to the impurity storage tank, a purging pipeline is respectively arranged between the butterfly valve and the ball valve, between the ball valve and the gate valve and between the two gate valves, and the collection of the three purging pipelines is connected with a branch pipeline of a steam pipeline for introducing 1.0MPa steam; a parallel pipeline with a stop valve is arranged at the top end of the impurity storage tank on one side opposite to the purge pipeline; the bottom of the impurity storage tank is provided with a slag discharge line, the bottom of the slag discharge line is provided with a barrel, a valve is arranged between the impurity storage tank and the barrel, and the impurity of the impurity storage tank is convenient to discharge into the barrel.

7. The solvent regeneration tower on-line deslagging system of claim 6, wherein: be equipped with the manometer on the jar lateral wall of impurity temporary storage one side, convenient control.

8. The solvent regeneration tower online deslagging system of claim 6 or 7, wherein: the temporary impurity storage tank is 1-2 cubic, and the design and manufacture requirements related to the material and thickness are consistent with those of the solvent regeneration tower.

9. The solvent regeneration tower online deslagging system of claim 1, wherein: one side of the solvent regeneration tower which is in the same direction with the solvent feeding line is also provided with a steam stripping pipeline, one pipeline in the steam stripping pipeline is connected to a pipeline which is arranged at the top end of the solvent regeneration tower and connected with the solvent recovery tower, the other pipeline is connected to the side wall of the bottom end of the solvent regeneration tower, and a stop valve is arranged on the pipeline.

10. The slag discharging process of the solvent regeneration tower online slag discharging system of claim 1 is characterized in that: the method comprises the following steps: (1) closing valves of a steam stripping pipeline, closing a gas phase valve at the top of the tower, and vacuumizing the solvent recovery tower and the solvent regeneration tower by using a solvent recovery tower evacuator to prevent vacuum degree fluctuation of the solvent recovery tower and the regeneration tower;

(2) opening a ball valve and a back-way double valve, opening a butterfly valve to enable impurities in the solvent regeneration tower to flow into an impurity cache tank according to 2t/h, closing the butterfly valve and the ball valve after the liquid level of the solvent regeneration tower is emptied, and opening a valve at the bottom of the impurity cache tank to discharge the impurities into a barrel;

(3) repeating the operation of the step (2) until the impurities in the solvent regeneration tower are emptied;

(4) finally, slightly opening a butterfly valve, controlling the steam to be 0.5t/h, introducing the steam into the solvent regeneration tower, and blowing off impurities in the valve body and then closing the valve body; then purging the ball valve and the back gate valve, closing the ball valve and the back gate valve, and finally purging impurities in the temporary impurity storage tank and the pipeline;

(5) and after the slag discharge is finished, the solvent regeneration process is put into use again.

Technical Field

The invention relates to slag discharge treatment of core equipment of an extraction device in aromatic hydrocarbon production, in particular to an online slag discharge system and process of a solvent regeneration tower, and belongs to the technical field of petrochemical industry.

Background

The design of the solvent regeneration tower is that the feed is a circulating sulfolane solvent, the sulfolane solvent is easily decomposed under the condition of local high temperature of equipment and easily decomposed when meeting oxygen, the sulfolane is degraded to be easily polymerized at high temperature to generate acidic substances and macromolecular polymers, and carries impurities in a pipeline and the like to cause the quality reduction of the sulfolane solvent, part of the circulating solvent needs to enter the solvent regeneration tower for steam stripping treatment, clean solvent is brought back to the system through steam stripping steam, and the impurities are left at the bottom of the tower. The problems of high viscosity and high chlorine content in the impurities cause serious corrosion to equipment, so the solvent regeneration tower needs to be periodically cut off for deslagging, and the solvent regeneration tower needs to be cut off, a blind guide plate needs to be operated in the deslagging process, and the blind guide plate needs to be newly operated after deslagging, the regeneration tower needs to be put into use, and the like. Has the disadvantages of large workload, long cutting and deslagging period and large manual workload.

Disclosure of Invention

In view of the problems, the on-line deslagging system and the on-line deslagging process for the solvent regeneration tower are provided, impurities at the bottom of the tower can be discharged only by stopping feeding of the regeneration tower after modification, the operation amount is small, the deslagging frequency can be increased, and long-time corrosion to equipment can be reduced. Thereby achieving the purposes of saving manpower, ensuring the maneuvering and convenience of the work and reducing the corrosion contact time of the equipment.

In order to achieve the purpose, the invention adopts the technical scheme that: solvent regeneration tower online slag removal system includes: the system comprises a solvent regeneration tower, a solvent recovery tower, a solvent feed line, a steam stripping pipeline, a steam pipeline and a slag discharge system; the bottom of one side of the solvent regeneration tower is connected with a solvent feeding line, the side wall and the top of the solvent regeneration tower positioned at the upper part of the solvent feeding line are respectively provided with a pipeline connected with the solvent recovery tower, the top of the solvent regeneration tower is provided with a gas phase valve, the bottom of the side wall of one side of the solvent regeneration tower in the direction opposite to the solvent feeding line is provided with a steam pipeline, the bottom of the solvent regeneration tower is connected with a slag discharge system through a pipeline, one end part of the steam pipeline is connected into the solvent regeneration tower, and a branch pipeline is led out from the steam pipeline and connected to the pipeline;

a stop valve is arranged on the steam pipeline close to the solvent regeneration tower, an 8-shaped blind plate is arranged on the stop valve, and a check valve is arranged on the steam pipeline far away from the solvent regeneration tower; a stop valve and an 8-shaped blind plate are also respectively arranged on the branch pipelines led out from the steam pipeline; 1.0MPa steam is introduced into the steam pipeline;

the solvent feeding line is connected in parallel in the solvent regeneration tower, an electric valve and a plunger valve are respectively arranged on the parallel pipelines, and the sulfolane solvent enters the solvent regeneration tower in different valve control modes;

the electric valve is FV-4013;

the pipeline which is positioned on the side wall of the solvent regeneration tower and connected with the solvent recovery tower comprises parallel pipelines, one pipeline is provided with an angle valve, the other pipeline is provided with a plunger valve, and the two pipelines are converged and connected to the solvent recovery tower; a pipeline which is positioned at the top of the solvent regeneration tower and connected with the solvent recovery tower is provided with a stop valve;

in order to reduce the temperature at the bottom of the solvent regeneration tower, a heat exchanger is arranged inside the position at the bottom of the solvent regeneration tower, one end of the heat exchanger is connected to a steam pipeline arranged outside the solvent regeneration tower, and a stop valve is arranged on the steam pipeline; the other end of the heat exchanger is connected with a water condensing pipeline outside the regeneration tower, an isolation valve is arranged on the water condensing pipeline, and stop valves are respectively arranged on two sides of the isolation valve; a branch pipeline is also arranged on the condensate pipeline, and a plunger valve is arranged on the branch pipeline; 2.2MPa steam is introduced into the steam pipeline;

the type of the isolating valve is FV-4015;

the slag discharging system comprises an impurity temporary storage tank, the top end of the impurity temporary storage tank is connected with the bottom end of the solvent regeneration tower through a pipeline, a butterfly valve, a ball valve and a double-gate valve are sequentially connected on the pipeline from the solvent regeneration tower to the impurity storage tank, a purging pipeline is respectively arranged between the butterfly valve and the ball valve, between the ball valve and the gate valve and between the two gate valves, and the collection of the three purging pipelines is connected with a branch pipeline of a steam pipeline for introducing 1.0MPa steam; a parallel pipeline with a stop valve is arranged at the top end of the impurity storage tank on one side opposite to the purge pipeline; a slag discharge line is arranged at the bottom of the impurity storage tank, a barrel is arranged at the bottom of the slag discharge line, and a valve is arranged between the impurity storage tank and the barrel, so that impurities in the impurity storage tank can be conveniently discharged into the barrel;

a pressure gauge is arranged on the side wall of one side of the impurity temporary storage tank, so that the monitoring is convenient;

the purging pipeline of the temporary storage tank is arranged to prevent the valve from being blocked due to high viscosity of impurities and being incapable of being closed completely, and the valve can be closed after being purged completely;

the temporary impurity storage tank is 1-2 cubic, and the design and manufacture requirements related to the material and thickness are consistent with those of the solvent regeneration tower;

a steam stripping pipeline is also arranged on one side of the solvent regeneration tower in the same direction as the solvent feeding line, one pipeline in the steam stripping pipeline is connected to a pipeline which is arranged at the top end of the solvent regeneration tower and connected with the solvent recovery tower, the other pipeline is connected to the side wall of the bottom end of the solvent regeneration tower, and a stop valve is arranged on the pipeline;

the method is characterized in that a butterfly valve, a ball valve and a double-gate valve are arranged at the bottom of a solvent regeneration tower, a 1.0MPA steam pipeline at two ends is added to an impurity temporary storage tank purging pipeline, a 1-2 cube impurity temporary storage tank is added, a slag discharging line is connected at the lowest point of the impurity temporary storage tank, when the solvent regeneration tower is cut off and discharged, feeding of the solvent regeneration tower is stopped, namely, the steps of cutting steam stripping steam to a bypass to operate and closing a gas phase valve at the top of the tower are omitted, and the solvent regeneration tower is cut off periodically to discharge slag; the workload is small, the deslagging frequency can be increased, and the long-time corrosion to equipment can be reduced. Thereby achieving the purposes of saving manpower, ensuring the maneuvering and convenience of the work and reducing the corrosion contact time of the equipment.

The slag discharging process of the online slag discharging system of the solvent regeneration tower comprises the following steps:

(1) closing valves of a steam stripping pipeline, closing a gas phase valve at the top of the tower, and vacuumizing the solvent recovery tower and the solvent regeneration tower by using a solvent recovery tower evacuator to prevent vacuum degree fluctuation of the solvent recovery tower and the regeneration tower;

(2) opening a ball valve and a back-way double valve, opening a butterfly valve to enable impurities in the solvent regeneration tower to flow into an impurity cache tank according to 2t/h, closing the butterfly valve and the ball valve after the liquid level of the solvent regeneration tower is emptied, and opening a valve at the bottom of the impurity cache tank to discharge the impurities into a barrel;

(3) repeating the operation of the step (2) until the impurities in the solvent regeneration tower are emptied;

(4) finally, slightly opening a butterfly valve, controlling the steam to be 0.5t/h, introducing the steam into the solvent regeneration tower, and blowing off impurities in the valve body and then closing the valve body; then purging the ball valve and the back gate valve, closing the ball valve and the back gate valve, and finally purging impurities in the temporary impurity storage tank and the pipeline;

(5) and after the slag discharge is finished, the solvent regeneration process is put into use again.

Drawings

FIG. 1 is a block diagram of the present invention.

In the figure, 1, a solvent regeneration tower, C-403, a solvent recovery tower, 2, a solvent feed line, 3, a stripping line, 4, 1.0MPa steam pipelines, 5, a gas phase valve, 6, a check valve, 7, an electric valve, 8, a plunger valve, 9, a butterfly valve, 10, an angle valve, 11, a heat exchanger, 4-1, 2.2MPa steam pipelines, 12, a condensed water pipeline, 13, an isolation valve, 14, an impurity temporary storage tank, 15, a ball valve, 16, a purging pipeline, 17, a slag discharge line, 18, a barrel, 18 and a pressure gauge.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the online deslagging system of the solvent regeneration tower comprises: the system comprises a solvent regeneration tower 1, a solvent recovery tower C-403, a solvent feed line 2, a stripping line 3, a steam line 4 and a slag discharge system; the bottom of one side of the solvent regeneration tower 1 is connected with a solvent feeding line 2, pipelines connected with a solvent recovery tower C-403 are respectively arranged on the side wall and the top of the solvent regeneration tower 1 positioned at the upper part of the solvent feeding line 2, a gas phase valve 5 is arranged on the top of the solvent regeneration tower 1, a steam pipeline 4 is arranged at the bottom end of the side wall of one side of the solvent regeneration tower 1 in the direction opposite to the direction of the solvent feeding line 2, the bottom 1 part of the solvent regeneration tower is connected with a slag discharge system through a pipeline, one end part of the steam pipeline 4 is connected into the solvent regeneration tower 1, and a branch pipeline is led out from the steam pipeline 4 and connected;

a stop valve is arranged on the steam pipeline 4 close to the solvent regeneration tower 1, an 8-shaped blind plate is arranged on the stop valve, and a check valve 6 is arranged on the steam pipeline far away from the solvent regeneration tower 1; a stop valve and an 8-shaped blind plate are also respectively arranged on the branch pipeline led out from the steam pipeline 4;

1.0MPa steam is introduced into the steam pipeline 4;

the solvent feeding line 2 is connected in parallel in the solvent regeneration tower 1, an electric valve 7 and a plunger valve 8 are respectively arranged on the parallel pipelines, and the sulfolane solvent enters the solvent regeneration tower 1 in different valve control modes;

the electric valve 7 is FV-4013;

the pipeline which is positioned on the side wall of the solvent regeneration tower 1 and connected with the solvent recovery tower C-403 comprises parallel pipelines, one pipeline is provided with an angle valve 10, the other pipeline is provided with a plunger valve 8, and the two pipelines are converged and connected to the solvent recovery tower C-403; a stop valve is arranged on the pipeline which is positioned at the top of the solvent regeneration tower 1 and connected with the solvent recovery tower C-403;

in order to reduce the temperature at the bottom of the solvent regeneration tower 1, a heat exchanger 11 is arranged inside the position at the bottom of the tower, one end of the heat exchanger 11 is connected to a steam pipeline 4-1 arranged outside the solvent regeneration tower 1, and a stop valve is arranged on the steam pipeline 4-1; the other end of the heat exchanger 11 is connected with a water condensation pipeline 12 outside the regeneration tower 1, an isolation valve 13 is arranged on the water condensation pipeline 12, and stop valves are respectively arranged on two sides of the isolation valve 13; a branch pipeline is also arranged on the condensed water pipeline 12, and a plunger valve 8 is arranged on the branch pipeline;

2.2MPa steam is introduced into the steam pipeline 4-1;

the type of the isolating valve 13 is FV-4015;

the slag discharging system comprises an impurity temporary storage tank 14, the top end of the impurity temporary storage tank 14 is connected with the bottom end of a solvent regeneration tower 1 through a pipeline, a butterfly valve 9, a ball valve 15 and a double-gate valve are sequentially connected on pipelines from the solvent regeneration tower 1 to the impurity storage tank 14, a purging pipeline 16 is respectively arranged between the butterfly valve 9 and the ball valve 15, between the ball valve 15 and the gate valve and between the two gate valves, and the three purging pipelines 16 are converged and connected with a branch pipeline 4 for introducing 1.0MPa steam; a parallel line with a stop valve is arranged at the top end of the impurity storage tank 14 at one side opposite to the purge line 16; a slag discharge line 17 is arranged at the bottom of the impurity storage tank 14, a barrel 18 is arranged at the bottom of the slag discharge line 17, and a valve is arranged between the impurity storage tank 14 and the barrel 18, so that impurities in the impurity storage tank 14 can be conveniently discharged into the barrel 18;

a pressure gauge 18 is arranged on the side wall of one side of the impurity temporary storage tank 14, so that the monitoring is convenient;

the slag discharging process of the online slag discharging system of the solvent regeneration tower comprises the following steps:

(1) closing valves of a steam stripping pipeline 3, closing a gas phase valve 5 at the top of the tower, and vacuumizing the solvent recovery tower C-403 and the solvent regeneration tower 1 by using a solvent recovery tower evacuator to prevent vacuum degree fluctuation of the solvent recovery tower C-403 and the regeneration tower 1;

(2) opening a ball valve and a back-way double valve, opening a butterfly valve to enable impurities in the solvent regeneration tower to flow into an impurity cache tank according to 2t/h, closing the butterfly valve and the ball valve after the liquid level of the solvent regeneration tower is emptied, and opening a valve at the bottom of the impurity cache tank to discharge the impurities into a barrel;

(3) repeating the operation of the step (2) until the impurities in the solvent regeneration tower 1 are emptied;

(4) finally, slightly opening a butterfly valve, controlling the steam to be 0.5t/h, introducing the steam into the solvent regeneration tower, and blowing off impurities in the valve body and then closing the valve body; then purging the ball valve and the back gate valve, closing the ball valve and the back gate valve, and finally purging impurities in the temporary impurity storage tank and the pipeline;

(5) and after the slag discharge is finished, the solvent regeneration process is put into use again.