CN219187992U

CN219187992U - Boundary area purging device of oil refining chemical device

Info

Publication number: CN219187992U
Application number: CN202320086304.9U
Authority: CN
Inventors: 李海涛; 王显景
Original assignee: Shandong Huifeng Petrochemical Group Co ltd
Current assignee: Shandong Huifeng Petrochemical Group Co ltd
Priority date: 2023-01-30
Filing date: 2023-01-30
Publication date: 2023-06-16
Anticipated expiration: 2033-01-30

Abstract

The utility model relates to a refinery chemical device, in particular to a boundary area purging device of the refinery chemical device. The oil refining chemical device comprises an oil refining chemical device and a main pipeline, wherein the main pipeline is connected with the oil refining chemical device in a device boundary region sequentially through a valve A and a valve B, a check valve A is arranged between the valve A and the valve B, a purging steam pipeline is connected between the check valve A and the valve A, the main pipeline between the valve A and the valve B is a device boundary region pipeline, the main pipeline on one side of the valve A, which is far away from the valve B, is an external pipeline of the device boundary region, and the main pipeline on one side of the valve B, which is far away from the valve A, is an internal pipeline of the device boundary region. The utility model can meet the purging requirements of pipelines and equipment in the boundary region of the device and also can meet the purging requirements of the pipeline equipment outside the boundary region. The device has the advantages that the airtight purging of peripheral pipeline equipment is realized, the working environment is improved, the physical health of operators is protected, and the environment is protected. The design quantity of boundary area sweeping steam is reduced, the investment cost of the device is reduced, and the boundary area space of the device is saved.

Description

Boundary area purging device of oil refining chemical device

Technical Field

The utility model relates to a refinery chemical device, in particular to a boundary area purging device of the refinery chemical device.

Background

Steam purging of oil refining chemical devices is an indispensable important link in production, and is mainly used for eliminating hidden danger, purging pipeline equipment and avoiding unnecessary loss. Before the device starts working, the pipelines and equipment which are installed and inspected to be qualified are required to be purged and cleaned, and the purpose is to purge and flush by using fluids such as air (nitrogen), steam, water, chemical solution and the like. The device mainly eliminates sundries such as welding slag, sand, rust and the like remained in newly added equipment and pipelines, avoids damaging valves, pumps, instrument elements and the like during the operation of the device, prevents blocking equipment and pipelines, causes parking or other major accidents, and ensures that the device is driven smoothly. When the device is stopped, steam is used for purging toxic and harmful and flammable and explosive media in the pipeline, so that the subsequent overhaul work of the device is ensured to be smoothly carried out.

The steam blowing is performed by taking steam with different parameters as a medium, has high blowing speed, and adopts an intermittent steam blowing mode, so that the pipeline can be subjected to cold and heat shrinkage and expansion, and attachments on the inner wall of the pipeline are peeled off, and the optimal blowing effect is achieved.

The main pipeline double valves of the boundary area of various oil refining chemical devices are internally provided with purging steam points, which are generally used for removing corrosive substances such as ponding, light oil, methane hydrate, ferric oxide, carbide dust, carbon disulfide, hydrosulfuric acid, oil condensation, wax precipitation, scaling and the like in the pipeline so as to reduce the corrosion damage of the corrosive substances to the inner wall of the pipeline and achieve the purposes of reducing the back pressure of oil transportation, reducing the abrasion resistance and lowering the oil transportation temperature.

As the atmospheric pollution emission control requirements become more stringent, the shutdown device requires that the closed emission be fully achieved. The open type purging mode can not meet the related requirements of the scheme for treating and attacking volatile organic compounds in 2020, the scheme for comprehensively treating volatile organic compounds in key industries and the standard for discharging pollutants in petrochemical industry (GB 31571-2015).

At present, each oil refining chemical device is provided with purging steam in a double valve of a boundary zone of the device, and the purging steam can only meet purging requirements of internal pipelines and equipment of the device during the startup and shutdown of the device, and temporary purging points need to be reconfigured for peripheral pipelines of the boundary zone. The existing sweeping steam setting mode can not meet the sweeping requirements of equipment and pipelines outside the boundary region.

Disclosure of Invention

The utility model provides a boundary area purging device of an oil refining chemical device, which aims to solve the problem that the purging steam can only meet the purging requirements of internal pipelines and equipment of the device during the startup and shutdown of the device, and temporary purging points need to be reconfigured on the peripheral pipelines of the boundary area.

In order to solve the problems, the technical scheme of the utility model is as follows:

the utility model relates to a boundary purging device of a refinery chemical device, which comprises the refinery chemical device and a main pipeline, wherein the main pipeline is connected with the refinery chemical device in the boundary of the device through a valve A and a valve B in sequence, a check valve A is arranged between the valve A and the valve B, a purging steam pipeline is connected between the check valve A and the valve A, the main pipeline between the valve A and the valve B is a device boundary pipeline, the main pipeline at one side of the valve A, which is far away from the valve B, is an external pipeline of the device boundary, and the main pipeline at one side of the valve B, which is far away from the valve A, is an internal pipeline of the device boundary.

Further, a valve C and a valve D are arranged on the purging steam pipeline.

Further, a check valve B, a vent valve B and an 8-shaped blind plate B are arranged between the valve C and the valve D.

The main pipeline and the purging steam pipeline are provided with check valves, so that liquid back flowing and backflow can be effectively prevented.

Furthermore, the valve A is provided with an 8-shaped blind plate A at a position close to the parallel connection position of the purging steam pipeline and the main pipeline.

The 8-shaped blind plate has one end being a blind plate and the other end being formed by combining throttling rings, and when fluid is conveyed, the throttling rings are utilized, and when the fluid is cut off, the blind plate is utilized, and the blind plate can be used for cutting off when the valve leaks. The sealing performance is relatively good, and the complete partition can be achieved.

Further, a vent valve A is arranged between the check valve A and the 8-shaped blind plate A.

The vent valve is provided for venting the pressurized purge vapor therethrough during non-operation or emergency conditions to avoid other accidents.

Furthermore, a pressure gauge is arranged on the main pipeline.

Working principle: when the device is started and stopped, the valve A of the main pipeline is closed, the valve B is opened, the valve C and the valve D on the purging steam pipeline are opened, and the main pipeline in the boundary region of the device is purged; after the main pipeline inside the boundary area is purged, a main pipeline valve A is opened, a valve B is closed, the main pipeline outside the boundary area is purged, the inverted blind end of the 8-shaped blind plate A is isolated after purging is completed, a valve C and a valve D on a purging steam pipeline are closed, and the inverted blind end of the 8-shaped blind plate B is isolated. The steam purging point is arranged in the middle of the double valves of the boundary region of the oil refining chemical device, so that the purging requirement of pipelines and equipment in the boundary region of the device can be met, and the purging requirement of the equipment outside the boundary region can also be met.

The beneficial effects of the utility model are as follows:

(1) The boundary area purging device of the oil refining chemical device can meet the purging requirements of pipelines and equipment in the boundary area of the device and also can meet the purging requirements of the equipment outside the boundary area.

(2) According to the boundary area purging device main pipeline and the purging steam pipeline of the oil refining chemical device, the check valves are arranged, so that liquid back-flowing backflow can be effectively prevented.

(3) The boundary area purging device of the oil refining chemical device realizes the airtight purging of peripheral pipeline equipment of the device, improves the working environment, protects the health of operators and protects the environment.

(4) The utility model reduces the design quantity of boundary region sweeping steam, reduces the investment cost of the device and saves the boundary region space of the device.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic diagram of a zone boundary purge apparatus of a refinery chemical unit of the present utility model;

in the figure: 1. outside the device boundary area; 2. a device boundary region; 3. the device boundary area; 4. a main pipe; 401. a valve A; 402. a blind plate A in 8 shape; 403. an emptying valve A; 404. a check valve A; 405. a valve B; 406. a pressure gauge; 5. purging the steam conduit; 501. a valve C; 502. a check valve B; 503. a blow-off valve B; 504. a blind plate B in the shape of 8; 505. a valve D; 6. oil refining chemical plant.

Detailed Description

The utility model will be described in more detail with reference to examples.

In one embodiment, as shown in fig. 1, a boundary purging device of a refinery chemical device comprises a refinery chemical device 6 and a main pipeline 4, wherein the main pipeline 4 is sequentially connected with the refinery chemical device 6 of a device boundary 3 through a valve A401 and a valve B405, a check valve A404 is arranged between the valve A401 and the valve B405, a purging steam pipeline 5 is connected between the check valve A404 and the valve A401, the main pipeline 4 between the valve A401 and the valve B405 is a device boundary 2 pipeline, the main pipeline 4 on the side of the valve A401 away from the valve B405 is a device boundary 1 pipeline, and the main pipeline 4 on the side of the valve B405 away from the valve A401 is a device boundary 3 pipeline.

It will be appreciated that the purge steam pipe 5 is provided with a valve C501 and a valve D505.

It can be appreciated that a check valve B502, a blow-off valve B503 and an 8-shaped blind plate B504 are arranged between the valve C501 and the valve D505.

The main pipeline 4 and the purging steam pipeline 5 are provided with check valves, so that liquid back-flowing backflow can be effectively prevented.

It is understood that the valve A401 is provided with an 8-shaped blind plate A402 near the parallel connection position of the purge steam pipe 5 and the main pipe 4.

It will be appreciated that a vent valve a403 is provided between the check valve a404 and the figure 8 blind plate a402.

It will be appreciated that the main pipe is provided with a pressure gauge 406.

Working principle: when the device is started and stopped, the valve A401 and the valve B405 of the main pipeline 4 are closed, the valve C501 and the valve D505 on the purging steam pipeline 5 are opened, and the main pipeline 4 in the device boundary region 3 is purged; after the main pipeline 4 in the boundary region 3 is purged, a valve A401 of the main pipeline 4 is opened, a valve B405 is closed, the main pipeline 4 outside the boundary region 1 is purged, an inverted blind end of the 8-shaped blind plate A402 is isolated after purging is completed, a valve C501 and a valve D505 on the purging steam pipeline 5 are closed, and an inverted blind end of the 8-shaped blind plate B504 is isolated. The steam purging point is arranged in the middle of the double valves of the oil refining chemical engineering device boundary region 2, so that the purging requirement of the pipeline and equipment in the device boundary region 3 can be met, and the purging requirement of the pipeline equipment outside the device boundary region 1 can also be met.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.

The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are to be included in the scope of the claims of the present utility model.

Claims

1. The utility model provides a limit area sweeps device of oil refining chemical industry device, includes oil refining chemical industry device (6), trunk line (4), and trunk line (4) link to each other with oil refining chemical industry device (6) of device limit area internal (3) through valve A (401), valve B (405) in proper order, a serial communication port, be equipped with check valve A (404) between valve A (401) and valve B (405), be connected between check valve A (404) and valve A (401) and sweep steam pipeline (5).

2. The boundary zone purging device of a refinery chemical unit according to claim 1, wherein the purging steam pipeline (5) is provided with a valve C (501) and a valve D (505).

3. The boundary purging device of the oil refining and chemical device according to claim 2, wherein a check valve B (502), an emptying valve B (503) and an 8-shaped blind plate B (504) are arranged between the valve C (501) and the valve D (505).

4. The boundary purging device of the oil refining chemical device according to claim 1, wherein the valve A (401) is provided with an 8-shaped blind plate A (402) close to the parallel connection position of the purging steam pipeline (5) and the main pipeline (4).

5. The boundary zone purging device of a refinery chemical unit according to claim 4, wherein a vent valve A (403) is arranged between the check valve A (404) and the 8-shaped blind plate A (402).

6. The boundary zone purging device of a refinery chemical unit according to claim 1, wherein a pressure gauge (406) is arranged on the main pipeline (4).