阅读说明：本技术 芳烃装置分流过滤系统 (Shunting and filtering system of aromatic hydrocarbon device ) 是由 金宇博 周世纬 高俭 于 2019-12-21 设计创作，主要内容包括：本发明属于化工工艺领域,具体涉及芳烃装置分流过滤系统,其包括过滤器进口管线、过滤器出口管线、第一过滤器、石脑油来料管线、第一旁路管线、第二旁路管线、进料换热器入口管线；所述过滤器进口管线由石脑油来料管线通过第一旁路管线引出至第一过滤器,第一过滤器连接至过滤器出口管线,过滤器出口管线通过第二旁路管线引出至进料换热器入口管线。本发明为可长期运行的系统,并且解决了石脑油杂质在脱氧塔入口的进料换热器位置沉积的问题。(The invention belongs to the field of chemical processes, and particularly relates to a flow-dividing and filtering system of an aromatic hydrocarbon device, which comprises a filter inlet pipeline, a filter outlet pipeline, a first filter, a naphtha incoming material pipeline, a first bypass pipeline, a second bypass pipeline and a feeding heat exchanger inlet pipeline; the filter inlet line leads from the naphtha incoming line to a first filter through a first bypass line, the first filter is connected to a filter outlet line, and the filter outlet line leads to a feed heat exchanger inlet line through a second bypass line. The invention is a system capable of operating for a long time, and solves the problem of deposition of naphtha impurities at the position of a feed heat exchanger at the inlet of a deoxygenation tower.)

1. Arene device reposition of redundant personnel filtration system, its characterized in that: the device comprises a filter inlet pipeline, a filter outlet pipeline, a first filter, a naphtha incoming pipeline, a first bypass pipeline, a second bypass pipeline and a feeding heat exchanger inlet pipeline; the filter inlet line leads from the naphtha incoming line to a first filter through a first bypass line, the first filter is connected to a filter outlet line, and the filter outlet line leads to a feed heat exchanger inlet line through a second bypass line.

2. The aromatics plant split stream filtration system of claim 1, wherein: the first filter is connected with the second filter in parallel.

3. The aromatics plant split stream filtration system of claim 2, wherein: the filter inlet line comprises a filter inlet main line, a first filter inlet line, a second filter inlet line; a remote transmission pressure gauge is arranged on the inlet main pipe line of the filter; the filter outlet lines comprise a filter outlet main line, a first filter outlet line, a second filter outlet line; the filter inlet main line is connected to the first filter by a first filter inlet line, the first filter is connected to the filter outlet main line by a first filter outlet main line, the filter inlet main line is connected to the second filter by a second filter inlet line, and the second filter is connected to the filter outlet main line by a second filter outlet line.

4. The aromatics plant split stream filtration system of claim 2 or 3, wherein: a first double valve and a second double valve are respectively arranged on the inlet pipeline of the first filter and the inlet pipeline of the second filter, a first 8-shaped blind plate is arranged between the first double valves, and a second 8-shaped blind plate is arranged between the second double valves; and a third double valve and a fourth double valve are respectively arranged on the outlet pipeline of the first filter and the outlet pipeline of the second filter, a third 8-shaped blind plate is arranged between the third double valves, and a fourth 8-shaped blind plate is arranged between the fourth double valves.

5. The aromatics plant split stream filtration system of claim 4, wherein: a first far on-site pressure gauge and a second far on-site pressure gauge are respectively arranged behind the first double valve and the second double valve; a third on-site pressure gauge and a fourth on-site pressure gauge are respectively arranged in front of the third double valve and the fourth double valve.

6. The aromatics plant split stream filtration system of any of claims 1-3, wherein: the first bypass line is connected to the filter inlet line by a 90 degree elbow and the second bypass line is connected to the filter outlet line by a 90 degree elbow.

7. The aromatics plant split stream filtration system of any of claims 1-3, wherein: and a first electromagnetic valve is arranged on the first bypass pipeline.

8. The aromatics plant split stream filtration system of any of claims 1-3, wherein: and a first guide and shower valve is arranged on the filter inlet pipeline, and a second guide and shower valve is arranged on the filter outlet pipeline.

9. The aromatics plant split stream filtration system of claim 2 or 3, wherein: the first filter is provided with a first inlet, a first outlet, a second inlet, a second outlet and a first filter bottom outlet; the filter inlet pipeline is connected to the first inlet, the first outlet is connected to the filter outlet pipeline, the second inlet is a steam inlet, the 1.0MPa steam pipeline is connected to the second inlet, the second outlet is connected to the flare line through the first safety valve and the pipeline, the outlet at the bottom of the first filter is communicated to the sump oil well, the sump oil well is connected with a sump oil pipe network, the outlet at the bottom of the first filter is connected with the first filter dense-arranging line, the nitrogen pipeline is connected to the 1.0MPa steam pipeline, and the 1.0MPa steam pipeline is provided with a first isolation valve close to the first filter.

10. The aromatics plant split stream filtration system of claim 9, wherein: the second filter is provided with a third inlet, a third outlet, a fourth inlet, a fourth outlet and a second filter bottom outlet; the filter inlet pipeline is connected to a third inlet, a third outlet is connected to a filter outlet pipeline, the fourth inlet is a steam inlet, a 1.0MPa steam pipeline is connected to the fourth inlet, the fourth outlet is connected to a torch line through a second safety valve and a pipeline, an outlet at the bottom of the second filter is communicated to a sump oil well, the sump oil well is connected with a sump oil pipe network, an outlet at the bottom of the second filter is connected with a second filter dense flat cable, the first filter dense flat cable and the second filter dense flat cable are converged at a dense flat cable guide and spray collecting pipe joint where the second electromagnetic valve is located, a first dense flat cable valve is arranged on the first filter dense flat cable, and a fifth 8-shaped blind plate is arranged between the first dense flat cable valve and the bottom of the first filter; the second filter dense flat cable is provided with a second dense flat cable valve, and a sixth 8-shaped blind plate is arranged between the second dense flat cable valve and the bottom of the second filter.

Technical Field

The invention belongs to the field of chemical processes, and particularly relates to a flow-dividing and filtering system of an aromatic hydrocarbon device.

Background

Due to the high impurity content of naphtha, after long-time operation, the deposition is carried out at the position of a feed heat exchanger at the inlet of a deoxygenation tower, so that the pressure difference is too high, and the operation influence on increasing the pre-hydrogenation feed quantity to 300t/h is large. In the prior art, no technical scheme for reducing the load of the deoxygenation tower exists, and the feeding amount of 300 tons cannot be maintained.

Therefore, it is necessary to develop a flow-through filtration system for an aromatics plant that can be operated for long periods of time.

Disclosure of Invention

In view of the drawbacks of the background art, the present invention provides a split-flow filtration system for aromatics plants, which is a system that can operate for a long period of time and solves the problem of deposition of naphtha impurities at the feed heat exchanger position at the inlet of a deoxygenator column.

In order to achieve the purpose, the invention adopts the technical scheme that the flow-dividing and filtering system of the aromatic hydrocarbon device comprises a filter inlet pipeline, a filter outlet pipeline, a first filter, a naphtha incoming pipeline, a first bypass pipeline, a second bypass pipeline and a feeding heat exchanger inlet pipeline; the filter inlet line leads from the naphtha incoming line to a first filter through a first bypass line, the first filter is connected to a filter outlet line, and the filter outlet line leads to a feed heat exchanger inlet line through a second bypass line.

Based on the technical scheme, the filter is installed when naphtha is taken off the line to the by-pass double valve of the deoxygenation tower, so that naphtha entering the feeding heat exchanger at the inlet of the deoxygenation tower is filtered, the filtered naphtha is introduced into the feeding heat exchanger, and the problem of deposition of naphtha impurities at the position of the feeding heat exchanger at the inlet of the deoxygenation tower is solved.

Further, the first filter is connected with the second filter in parallel.

Further, the filter inlet line comprises a filter inlet main line, a first filter inlet line, a second filter inlet line; a remote transmission pressure gauge is arranged on the inlet main pipe line of the filter; the filter outlet lines comprise a filter outlet main line, a first filter outlet line, a second filter outlet line; the filter inlet main line is connected to the first filter by a first filter inlet line, the first filter is connected to the filter outlet main line by a first filter outlet line, the filter inlet main line is connected to the second filter by a second filter inlet line, and the second filter is connected to the filter outlet main line by a second filter outlet line.

Further, a first double valve and a second double valve are respectively arranged on the inlet pipeline of the first filter and the inlet pipeline of the second filter, a first 8-shaped blind plate is arranged between the first double valves, and a second 8-shaped blind plate is arranged between the second double valves; and a third double valve and a fourth double valve are respectively arranged on the outlet pipeline of the first filter and the outlet pipeline of the second filter, a third 8-shaped blind plate is arranged between the third double valves, and a fourth 8-shaped blind plate is arranged between the fourth double valves.

Further, a first far on-site pressure gauge and a second far on-site pressure gauge are respectively arranged behind the first double valve and the second double valve; a third on-site pressure gauge and a fourth on-site pressure gauge are respectively arranged in front of the third double valve and the fourth double valve.

Preferably, the first bypass line is connected to the filter inlet line by a 90 degree elbow and the second bypass line is connected to the filter outlet line by a 90 degree elbow.

Furthermore, a first pilot valve is arranged on the filter inlet pipeline, a second pilot valve is arranged on the filter outlet pipeline, and a first electromagnetic valve is arranged on the first bypass pipeline.

Further, a first inlet, a first outlet, a second inlet, a second outlet and a first filter bottom outlet are arranged on the first filter; the filter inlet pipeline is connected to the first inlet, the first outlet is connected to the filter outlet pipeline, the second inlet is a steam inlet, the 1.0MPa steam pipeline is connected to the second inlet, the second outlet is connected to the flare line through the first safety valve and the pipeline, the outlet at the bottom of the first filter is communicated to the sump oil well, the sump oil well is connected with a sump oil pipe network, the outlet at the bottom of the first filter is connected with the first filter dense-arranging line, the nitrogen pipeline is connected to the 1.0MPa steam pipeline, and the 1.0MPa steam pipeline is provided with a first isolation valve close to the first filter.

Further, the second filter is provided with a third inlet, a third outlet, a fourth inlet, a fourth outlet and a second filter bottom outlet; the filter inlet pipeline is connected to a third inlet, a third outlet is connected to a filter outlet pipeline, the fourth inlet is a steam inlet, a 1.0MPa steam pipeline is connected to the fourth inlet, the fourth outlet is connected to a torch line through a second safety valve and a pipeline, an outlet at the bottom of the second filter is communicated to a sump oil well, the sump oil well is connected with a sump oil pipe network, an outlet at the bottom of the second filter is connected with a second filter dense flat cable, the first filter dense flat cable and the second filter dense flat cable are converged at a dense flat cable guide and spray collecting pipe joint where the second electromagnetic valve is located, a first dense flat cable valve is arranged on the first filter dense flat cable, and a fifth 8-shaped blind plate is arranged between the first dense flat cable valve and the bottom of the first filter; the second filter dense flat cable is provided with a second dense flat cable valve, and a sixth 8-shaped blind plate is arranged between the second dense flat cable valve and the bottom of the second filter.

The invention has the beneficial effects that: the system can be operated for a long time, and solves the problem that naphtha impurities are deposited at the position of a feed heat exchanger at the inlet of a deoxygenation tower.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a process flow diagram of a deoxygenator column;

FIG. 3 is a list of devices employed in the examples;

in the figure: 1. first filter, 1.1, first inlet, 1.2, first outlet, 1.3, second inlet, 1.4, second outlet, 1.5, first filter bottom outlet, 2, first bypass line, 3, second bypass line, 4, second filter, 4.1, third inlet, 4.2, third outlet, 4.3, fourth inlet, 4.4, fourth outlet, 4.5, second filter bottom outlet, 5, filter inlet manifold, 6, first filter inlet line, 7, second filter inlet line, 8, remote pressure gauge, 9, filter outlet manifold, 10, first filter outlet line, 11, second filter outlet line, 12, first double valve, 13, second double valve, 14, first 8 blind plate, 15, second 8 blind plate, 16, third double valve, 17, fourth double valve, 18, third 8 blind plate, 19, fourth blind plate, 8 blind plate, 20 blind plate, A first far on-site pressure gauge, 21, a second far on-site pressure gauge, 22, a third on-site pressure gauge, 23, a fourth on-site pressure gauge, 24, a first leaching valve, 25, a second leaching valve, 27, a 1.0MPa steam pipeline, 28, a first safety valve, 29, a flare line, 30, a first isolation valve, 31, a second safety valve, 32, a nitrogen pipeline, 33, a second isolation valve, 34, a first dirty oil well, 35, a second dirty oil well, 36, a bypass double valve, 37, a first filter dense flat cable, 38, a second filter dense flat cable, 39, a second electromagnetic valve, 40, a first dense flat cable valve, 41, a fifth 8-shaped blind plate, 42, a second dense flat cable valve, 43, a sixth 8-shaped blind plate, 44, a naphtha incoming pipeline, 45, a feeding heat exchanger inlet pipeline, 46, a feeding heat exchanger at the inlet of a deoxygenating tower, 47 and a deoxygenating tower.

Detailed Description

The structure of the invention is further explained in the following with the attached drawings of the specification.

The flow dividing and filtering system of the aromatic hydrocarbon device comprises a filter inlet pipeline, a filter outlet pipeline and a first filter 1; the filter inlet line leads from the naphtha feed line 44 via a first bypass line 2 to a first filter 1, the first filter 1 being connected to a filter outlet line, which leads via a second bypass line 3 to a feed heat exchanger inlet line 45.

Further, the first filter 1 is connected with the second filter 4 in parallel.

Further, the filter inlet lines include a filter inlet main line 5, a first filter inlet line 6, a second filter inlet line 7; a remote transmission pressure gauge 8 is arranged on the filter inlet main pipeline 5; the filter outlet lines comprise a filter outlet main line 9, a first filter outlet line 10, a second filter outlet line 11; the filter outlet main line 9 is connected to the first filter 1 by a first filter outlet line 10, the first filter 1 is connected to the filter outlet main line 9 by a first filter outlet line 10, the filter inlet main line 5 is connected to the second filter 4 by a second filter inlet line 7, the second filter 4 is connected to the filter outlet main line 9 by a second filter outlet line 11.

Further, a first double valve 12 and a second double valve 13 are respectively arranged on the first filter inlet pipeline 6 and the second filter inlet pipeline 7, a first 8-shaped blind plate 14 is arranged between the first double valves 12, and a second 8-shaped blind plate 15 is arranged between the second double valves 13; a third double valve 16 and a fourth double valve 17 are respectively arranged on the first filter outlet pipeline 10 and the second filter outlet pipeline 11, a third 8-shaped blind plate 18 is arranged between the third double valves 16, and a fourth 8-shaped blind plate 19 is arranged between the fourth double valves 17.

Further, a first remote pressure gauge 20 and a second remote pressure gauge 21 are respectively arranged behind the first double valve 12 and the second double valve 13; a third local pressure gauge 22 and a fourth local pressure gauge 23 are respectively arranged in front of the third double valve 16 and the fourth double valve 17.

Preferably, the first bypass line 2 is connected to the filter inlet line by a 90 degree elbow and the second bypass line 3 is connected to the filter outlet line by a 90 degree elbow.

Further, a first pilot valve 24 is arranged on the filter inlet pipeline, a second pilot valve 25 is arranged on the filter outlet pipeline, and a first electromagnetic valve is arranged on the first bypass pipeline 2.

Further, the first filter 1 is provided with a first inlet 1.1, a first outlet 1.2, a second inlet 1.3, a second outlet 1.4 and a first filter bottom outlet 1.5; the filter inlet pipeline is connected to a first inlet 1.1, a first outlet 1.2 is connected to a filter outlet pipeline, the second inlet is a steam inlet, a 1.0MPa steam pipeline 27 is connected to a second inlet 1.3, a second outlet 1.4 is connected to a flare line 29 through a first safety valve 28 and a pipeline, the outlet at the bottom of the first filter is communicated to a first sewage well 34, the first sewage well 34 is connected with a sewage oil pipe network, the outlet at the bottom of the first filter 1 is connected with a first filter dense-arranged line 37, a nitrogen pipeline is connected to the 1.0MPa steam pipeline, and a first isolation valve 30 is arranged at the position, close to the first filter 1, of the 1.0MPa steam pipeline 27.

Further, the second filter 4 is provided with a third inlet 4.1, a third outlet 4.2, a fourth inlet 4.3, a fourth outlet 4.4 and a second filter bottom outlet 4.5; the filter inlet pipeline is connected to a third inlet 4.1, a third outlet 4.2 is connected to a filter outlet pipeline, the fourth outlet 4.4 is a steam inlet, the 1.0MPa steam pipeline 27 is connected to a fourth outlet 4.4, the fourth outlet 4.4 is connected to a flare line 29 through a second safety valve 31 and a pipeline, the outlet at the bottom of the second filter 4 is communicated to a second sewage well 35, the second sewage well 35 is connected to a sewage pipe network, the outlet at the bottom of the second filter 4 is connected to a second filter dense flat cable 38, the first filter dense flat cable 37 and the second filter dense flat cable 38 are converged at a dense flat discharge collecting pipe joint where a second electromagnetic valve 39 is located, a first dense flat cable valve 40 is arranged on the first filter dense flat cable 37, and a fifth 8-shaped blind plate 41 is arranged between the first dense flat cable valve 40 and the bottom of the first filter 4; the second filter dense-row line 38 is provided with a second dense-row line valve 42, and a sixth 8-shaped blind plate 43 is arranged between the second dense-row line valve 42 and the bottom of the second filter 4.

This example is further illustrated by:

first, process pipeline transformation

1) And taking naphtha to a by-pass double valve of the deoxygenation tower off line, respectively connecting 90-degree elbows to lead out an inlet and outlet pipeline DN250PN2.0 of the newly added filter, and respectively adding a DN20 PN2.0 second pilot valve 25 at the position, close to the original by-pass double valve 36, of the low point of a main outlet pipeline 9 of the newly added filter, for discharging oil from the pipeline after shutdown.

2) Two filters SR102A/B are added, one on and one on during normal production, and are installed below the north side pipe gallery of the first electromagnetic valve. Double valves are respectively added to the inlet and outlet pipelines, and 8-shaped blind plates (DN 250PN 2.0) are respectively added between the double valves.

3) And an on-site pressure gauge is respectively added behind the inlet double valve and in front of the outlet double valve of the filter and used for monitoring the operating pressure on site.

4) A remote pressure gauge is added on the inlet header pipe of the filter and is used for monitoring the naphtha feeding pressure.

5) A remote transmission pressure difference meter is added to a main pipe of an inlet and an outlet of the filter and used for monitoring the pressure difference of the filter.

Second, close arrangement line transformation

1) The bottom of each of the two filters is respectively added with a flat cable and an OD (DN 40 PN 2.0) for the drainage of the filter. The two filter dense cables are converged and finally collided with the head of the second electromagnetic valve dense cable guide and spray collecting pipe. The blind covers of the second electromagnetic valve and the front hand valve close-packed drainage manifold are opened, and the SR102A/B close-packed pipeline is connected with the flange thereof, as shown in figure 1.

2) An 8-shaped blind plate (DN 40 PN 2.0) is respectively added in front of the second valve of the bottom dense-row line and is used for shutdown and isolation.

Thirdly, improvement of safety valve outlet torch line

1) In order to prevent the 'overpressure' accident of the newly added filter, a safety valve is respectively added on the top of the filter.

Four, nitrogen purge line and steam purge line modification

1) When the filter is cleaned, the filter needs to be subjected to steam and nitrogen purging, a purging line (DN 20 PN 2.0) is added from the middle of the filter, and valve isolation is added at a position close to the filter body.

2) The nitrogen purging line and the steam purging line are respectively led out from the nitrogen line and the steam line connecting tee joint and connected, wherein one check valve is additionally arranged on the nitrogen line.

It should be noted that, with specific reference to fig. 3, the specification of the local pressure gauge used in this embodiment is 0-1.6 MPA; the remote transmission pressure gauge is a pressure transmitter; the specification of the remote transmission pressure difference meter is STD 725; the hand valve adopts a 13CR/WCB hand valve with specification of DN 50-2.0; the first filter and the second filter adopt a Q245R filter with the specification of phi 1000 × 2.883.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.