WO2020034595A1 - Main process module of skid-mounted pressure reduction system - Google Patents

Abstract

A main process module of a skid-mounted pressure reduction system comprises multiple main process pipelines, wherein the main process pipelines are provided with pressure reduction valve sets; the N main process pipelines are arranged in a three-dimensional space based on a principle of stress minimization; and the main process pipelines are functionally identical, and are standby lines for each other, and the function thereof satisfies at least one of the following requirements: one-on and multi-standby, or simultaneous start. The main process module solves the problem of flushing of a dead zone of a pipeline, can effectively prevent the pipeline from coking and being blocked, ensures that the system can be maintained online and provides a long-term solution for a pressure reduction system for a medium in high-temperature and high-pressure harsh operation conditions.

Description

Main process module of skid-mounted decompression system

This application claims the priority of a Chinese patent application filed on August 16, 2018 with the application number of 201810935159.0 and the invention name of "a main process module for skid-mounted pressure reduction system" filed with the Chinese Patent Office, the entire contents of which are incorporated by reference. In this application.

Technical field

The invention belongs to the technical field of coal chemical and petrochemical equipment, and particularly relates to a main process module of a skid-mounted pressure reduction system.

Background technique

In recent years, crude oil products at home and abroad have become worse, and the market demand for light and clean fuel oils has continued to increase. Therefore, while continuing to promote the restructuring and upgrading of the refining industry and the quality of refined oil products, some countries have vigorously promoted clean and efficient coal. Utilize and promote the technological research and development of coal-to-gas and coal-to-oil. Among them, high-efficiency energy development processes such as direct coal coal production, kerosene blending, coal tar hydrogenation, and residue / heavy oil hydrogenation using non-fixed bed (suspended bed / ebullating bed) hydrogenation reactors as core devices have received more attention. More and more attention.

In the above four hydrogenation process directions, in addition to the direct coal oil production process subject to the continued downturn in international crude oil prices, the other three process routes belong to the modification of "waste oil" or heavy oil, and fully extract the residual value of raw materials to achieve Maximize the marginal benefits of the oil refining and coking industries. Regardless of the process, the process medium must be depressurized by a pressure reduction system after the hydrogenation reactor to perform product separation.

Suspended bed hydrocracking adopts the "suspended bed + fixed bed" process flow. In the suspended bed hydrogenation section, raw materials, additives and hydrogen are mixed and heated up and pressurized and enter the suspended bed reactor. Because no catalyst is used, the main occurrences here It is a thermal cracking reaction under high hydrogen partial pressure. During the reaction, the residual carbon, asphaltenes, and metals in the raw materials are adsorbed on the additives and cracked. Reactions such as heavy metals and a small amount of generated coke eventually deposit on the additives. The additives and unconverted heavy components settle under hot high pressure At the bottom of the reactor, the decompression system enters the low-pressure separator for flash separation again. The separated solid-containing slurry enters the decompression tower for refractionation. Finally, the solid oil residue at the bottom of the decompression tower enters the molding system for solidification to form solid oil Slag.

The raw material processed by the fluidized bed hydrogenation process is also a mixture of heavy oil and additives or pulverized coal. The product of the fluidized bed reaction requires a high-pressure separator for gas-liquid-solid separation. The solid and heavy liquid phase form a slurry from the bottom of the high-pressure high-pressure separator. After the pressure reduction system enters the medium pressure separator or the low pressure separator for re-separation, a complete and stable pressure reduction system is also needed to send the high-temperature, high-pressure-difference solid-containing slurry to the low-pressure separator.

However, for the decompression system at the bottom of the hot high-pressure separator of a suspended bed or ebullated bed hydrogenation unit currently under construction or already in operation, the feed of the suspended or ebullated bed is heavy oil (coal tar, atmospheric residue, vacuum residue Oil, catalytic slurry, fuel oil, etc.) and additives, or a mixture of heavy oil and pulverized coal (oil-coal slurry), the high-to-low thermal pressure reducing valve group is high temperature, high pressure difference, high solid content The operating conditions are extremely vulnerable to erosion and damage, and there are various levels of wear problems. The shortest hours and longest months need to be switched and repaired. The operation is difficult, the maintenance costs are high, the safety risks are large, and the operation is smooth. difficult. And how to design the pressure reducing valve group of the skid-mounted pressure reducing system so as to avoid the above-mentioned technical problems faced by the traditional technical solution as much as possible is particularly urgent.

Summary of the Invention

The technical problem to be solved by the present invention is to provide a main process module of a skid-mounted decompression system, to realize a complete system decompression function, and a structural stress minimization arrangement.

To achieve this, the technical solutions adopted by the present invention are:

A main process module of a skid-mounted pressure reduction system. The main process module includes N main process pipelines, where N is a positive integer of 2-7, and the main process pipeline is provided with a pressure reducing valve group, and the N pipelines The main process pipelines are laid out in three dimensions according to the principle of stress minimization;

The functions of each of the main process pipelines are exactly the same, and each of them is a backup line, and its function meets at least one of the following requirements: one open multiple standby or simultaneous activation.

In an optional embodiment, the pressure reducing valve group includes an automatic valve, and the main process module is further configured with a mechanical control system that provides a torque required by each of the automatic valves under a power source. , It is transmitted to the valve body structure through the valve stem to control the opening and closing of each automatic valve.

In an optional embodiment, the N main process pipelines are located between the inlet and the outlet of the pressure reducing system, and are symmetrically distributed or uniformly distributed in the circumferential direction with the inlet and outlet connections of the pressure reducing system as the center line.

In an alternative embodiment, the inlets of the N main process pipelines are connected together through one pipeline, and the outlets are connected together through another pipeline; or

An inlet of the N main process pipeline is connected through a multi-way switching valve, and an outlet is connected through another multi-way switching valve.

In an optional embodiment, the inlets of the N main process pipelines are connected through a multi-port switching valve I, and the outlets are connected through a multi-port switching valve II, and are distributed circumferentially;

The multi-way switching valve I includes a multi-way switching valve I inlet pipe and a plurality of multi-way switching valve I outlet pipes located below the multi-way switching valve I inlet pipe and distributed in a circumferential direction, each of the multi-way switching valves A switching valve element I for controlling opening and closing is installed on each side of the I outlet pipe, and the top end of the inlet pipe of the multi-way switching valve I is an inlet of the medium;

The multi-way switching valve II includes a multi-way switching valve II outlet pipe and a plurality of multi-way switching valve II inlet pipes located above the multi-way switching valve II outlet pipe and distributed in a circumferential direction, each of the multi-way switching valves A switching valve element II for controlling the opening and closing of the inlet pipe is installed on the side of the II inlet pipe; the bottom end of each of the multi-way switching valve I outlet pipes passes through the main process pipeline and the corresponding multi-way switching valve II respectively The tops of the inlet pipes are connected;

The medium enters through the inlet pipe of the multi-way switching valve I, and selectively flows into one or more of the N main process pipelines according to the opening and closing of the switching valve element I. After decompression, it passes through the The switching valve element II converges at the outlet pipe of the multi-way switching valve II, and finally flows out.

In an optional embodiment, the pressure reducing valve group includes a pressure reducing valve front cut-off valve, a pressure reducing valve, and a pressure reducing valve rear cut-off valve which are arranged in this order. Between the inlet of the cut-off valve before the pressure reducing valve, between the outlet of the cut-off valve before the pressure reducing valve and the inlet of the pressure reducing valve, the outlet of the pressure reducing valve and the pressure reducing adjustment The inlets of the shut-off valve after the valve, the outlets of the shut-off valve after the pressure-reducing regulating valve, and the inlet pipe of the multi-way switching valve II are respectively connected through connecting pipes.

In an optional embodiment, the multi-port switching valve I is at least one of a three-way valve, a four-way valve, a five-way valve, a six-way valve, a seven-way valve, and an eight-way valve;

The number of outlet pipes of the multi-way switching valve I is equal to the number of inlet pipes of the multi-way switching valve II.

In an optional embodiment, the cut-off valve before the pressure-reducing regulating valve is an angular cut-off valve, the cut-off valve after the pressure-reducing regulating valve is a ball valve, and the angle-shaped cut-off valve and the ball valve are both installed horizontally, and the pressure-reducing adjustment is performed. The valve is installed vertically;

An outlet pipe of the multi-way switching valve I and a side inlet of the angle cut-off valve are connected through an L-shaped connecting pipe I arranged vertically, and a rear end outlet of the angle cut-off valve is adjusted to the pressure reduction. The side inlets of the valve are connected through a horizontally arranged horizontal tubular connecting pipe II, and the bottom outlet of the pressure reducing regulating valve is connected with the front end inlet of the ball valve through a vertically arranged L-shaped connecting pipe III. A rear end outlet of the ball valve and an inlet pipe of the multi-way switching valve II are connected through an L-shaped connecting pipe IV provided vertically.

In an alternative embodiment, the cut-off valve before the pressure-reducing regulating valve is an angular cut-off valve, the cut-off valve after the pressure-reducing regulating valve is a ball valve, and the angle-shaped cut-off valve, the pressure-reducing regulating valve and the ball valve are horizontally installed. ;

An outlet pipe of the multi-way switching valve I and a side inlet of the angle cut-off valve are connected through an L-shaped connecting pipe I provided vertically, and a rear end outlet of the angle cut-off valve is connected to the pressure reducing regulating valve. The side inlets are connected by a vertically-shaped L-shaped connecting pipe II, and the rear end outlet of the pressure reducing valve and the front-end inlet of the ball valve are connected by a horizontally arranged horizontal tubular connecting pipe III. The rear end outlet of the ball valve and the inlet pipe of the multi-way switching valve II are connected through an L-shaped connecting pipe IV which is vertically arranged.

In an alternative embodiment, the cut-off valve before the pressure-reducing regulating valve is an angular cut-off valve, the cut-off valve after the pressure-reducing regulating valve is a ball valve, and the angle-shaped cut-off valve, the pressure-reducing regulating valve and the ball valve are horizontally installed. ;

An outlet pipe of the multi-way switching valve I and a side inlet of the angular cut-off valve are connected through an L-shaped connecting pipe I provided vertically, and a rear-end outlet of the angular cut-off valve is connected to the pressure reducing valve The side inlets are connected by an L-shaped connecting pipe II arranged vertically, and the rear-end outlet of the pressure reducing valve and the front-end inlet of the ball valve are connected by a horizontally arranged L-shaped connecting pipe III. The rear end outlet of the pressure reducing valve and the front end inlet of the ball valve are connected through a horizontally arranged L-shaped connecting pipe III. The rear end outlet of the ball valve and the inlet pipe of the multi-way switching valve II are connected by a vertical pipe. The straight L-shaped connecting pipe IV is connected.

The beneficial effects of the present invention are:

(1) In the present invention, the configuration of the multi-way pressure reducing valve group provides a long-cycle solution for the pressure reducing system of high-temperature and high-pressure severe working medium.

(2) The structural arrangement of the present invention solves the dead zone flushing problem of the pipeline, and can effectively avoid coking and blockage of the pipeline.

(3) In the present invention, the combined configuration of the multi-way switching valve, the angular cut-off valve, the regulating valve, the ball valve, and the multi-way switching valve makes the front and rear switching of the regulating valve more reliable and ensures that the system can be maintained online.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a main process module including a 4-pipe main line of a skid-mounted pressure reducing system;

Figure 2-1 is a schematic diagram of the structure of a main process module including 4 main lines in a symmetrical and distributed installation;

Figure 2-2 is a schematic diagram of the structure of a main process module including a 4-way main line distributedly distributed in a circumferential direction;

FIG. 2-3 is a schematic structural diagram of Embodiment 2;

FIG. 2-4 is a schematic structural diagram of Embodiment 3;

FIG. 3 is an enlarged structure diagram of the multi-port switching valve I;

FIG. 4 is an enlarged structure diagram of the multi-port switching valve II.

In the figure, 1, the inlet pipe of the multi-way switching valve I; 2, the switching valve element I; 3, the connecting pipe; 31, the connecting pipe I; 32, the connecting pipe II; 33, the connecting pipe III; 34, the connecting pipe IV; 4 Control valve group; 5. Switching valve element II; 6. Multi-port switching valve II outlet pipe; 7. Angle cut-off valve; 9. Pressure reducing valve; 11. Ball valve; 13. Multi-way switching valve I outlet pipe; 14 Multi-way switching valve II inlet pipe.

detailed description

The technical solution of the present invention will be described in detail below with reference to the drawings and specific embodiments.

The present invention relates to a main process module of a skid-mounted pressure reducing system. The main process module is N main process pipelines arranged in a three-dimensional space. N is one of 2, 3, 4, 5, 6, and 7. The main process module is Arrangement in a limited space according to the principle of stress minimization;

Each main process pipeline includes a pressure reducing valve group with a pressure reducing valve as the core and a front and rear shut-off valve / switching valve as the auxiliary;

Each valve includes at least one of an automatic valve and a manual valve;

N main process pipeline is located between the inlet and outlet of the pressure reduction system;

The function of each main process pipeline is exactly the same, and each of them is a backup line, and its function meets at least one of the following requirements: one is open for multiple backups, and is activated at the same time.

In specific applications, when the main process module contains an automatic valve, the main process module is configured with a mechanical control system as the actuator of the automatic valve and its control system;

The mechanical control system includes at least one of an electric control system, a pneumatic control system, and an electro-hydraulic control system; the mechanical control system provides the torque required for each automatic valve action under the power source, air source or power source of the hydraulic system, and is transmitted through the valve stem Give the valve body structure to control the opening and closing of each automatic valve;

The N main process pipeline is located between the inlet and outlet of the pressure reducing system, and uses the inlet and outlet connections of the pressure reducing system as the center line. The distribution form is one of two forms: symmetrical distribution and circumferential uniform distribution;

N main process pipelines are connected in one of the following ways: the inlets and outlets of the main process pipelines of each channel are connected by pipelines, and the N main process pipelines are connected together by using multi-way switching valves;

When the N main process pipelines are connected together through a multi-way switching valve and are installed in a circumferentially distributed manner, the main process module includes a multi-way switching valve I, a connecting pipeline, a regulating valve group, and a multi-way switching valve II;

The multi-port switching valve I includes a multi-port switching valve I inlet pipe and a plurality of multi-port switching valve I outlet pipes located below the multi-port switching valve I inlet pipe and distributed in a circumferential direction. Each side is provided with a switching valve element I for controlling its opening and closing, and the top end of the inlet pipe of the multi-way switching valve I is an inlet of a high temperature and high pressure medium;

The multi-way switching valve II includes a multi-way switching valve II outlet pipe and a plurality of multi-way switching valve II inlet pipes located above the multi-way switching valve II outlet pipe and distributed in a circumferential direction. Each side is equipped with a switching valve element II that controls its opening and closing; the bottom end of each multi-way switching valve I outlet pipe is connected to the top of the corresponding multi-way switching valve II inlet pipe through a regulating valve group respectively;

The regulating valve group includes a pressure reducing valve front shut-off valve, a pressure reducing regulating valve, and a pressure reducing valve rear shut-off valve which are sequentially arranged, between the multi-way switching valve I outlet pipe and the inlet of the angular shut-off valve, the Between the outlet of the angle cut-off valve and the inlet of the pressure reducing regulating valve, between the outlet of the pressure reducing regulating valve and the inlet of the ball valve, between the outlet of the ball valve and the inlet pipe of the multi-way switching valve II Connected by connecting pipes respectively;

The high-temperature and high-pressure medium enters the regulating valve group through the multi-way switching valve I from the inlet, and flows out from the outlet through the multi-way switching valve II after being decompressed by the regulating valve;

The high-temperature and high-pressure medium enters the pressure reducing system from the inlet pipe of the multi-way switching valve I, and selectively flows into one or more of the regulating valve groups through the switching valve element I. After the regulating valve group is depressurized, it is gathered in the switching valve element II At the outlet pipe of the multi-way switching valve II, it finally flows out;

The multi-port switching valve I is at least one of a three-way valve, a four-way valve, a five-way valve, a six-way valve, a seven-way valve, and an eight-way valve;

The number of outlet pipes of the multi-way switching valve I is equal to the number of inlet pipes of the multi-way switching valve II;

When the cut-off valve of the pressure reducing valve is an angular cut-off valve, and when the cut-off valve of the pressure-reducing regulating valve is a ball valve, the angle cut-off valve and the ball valve are installed horizontally, and the pressure-reducing regulating valve is installed vertically; the multi-way switching valve The I outlet pipe is connected to the side inlet of the angle cut-off valve through a vertically arranged L-shaped connecting pipe I, and the rear end outlet of the angle cut valve and the side inlet of the pressure reducing valve are connected. It is connected by a horizontally arranged horizontal tubular connecting pipe II, and the bottom outlet of the pressure reducing regulating valve is connected with the front end inlet of the ball valve through a vertically arranged L-shaped connecting pipe III, and the rear end of the ball valve The outlet is connected to the inlet pipe of the multi-way switching valve II through an L-shaped connecting pipe IV provided vertically;

When the cut-off valve of the pressure reducing valve is an angular cut-off valve, and when the ball-valve cut-off valve is used as the cut-off valve, the angle cut-off valve, the pressure-reducing regulating valve and the ball valve are installed horizontally; The side inlets of the angle cut-off valve are connected through a vertically arranged L-shaped connecting pipe I, and the rear end outlet of the angle cut-off valve and the side inlet of the pressure-reducing regulating valve are connected vertically. The L-shaped connecting pipe II is connected, and the rear end outlet of the pressure reducing valve is connected to the front end inlet of the ball valve through a horizontally arranged horizontal tubular connecting pipe III. The rear end outlet of the ball valve is connected to the multi-port The inlet pipes of the on-off switching valve II are connected by an L-shaped connecting pipe IV arranged vertically;

When the cut-off valve of the pressure reducing valve is an angular cut-off valve, and when the ball-valve cut-off valve is used as the cut-off valve, the angle cut-off valve, the pressure-reducing regulating valve and the ball valve are installed horizontally; The side inlets of the angle cut-off valve are connected through a vertically arranged L-shaped connecting pipe I, and the rear end outlet of the angle cut-off valve and the side inlet of the pressure-reducing regulating valve are connected vertically. The L-shaped connecting pipe II is connected, and the rear end outlet of the pressure reducing valve is connected to the front end inlet of the ball valve through a horizontally arranged L-shaped connecting pipe III. The rear end outlet of the pressure reducing valve is connected to The front end inlet of the ball valve is connected through a horizontally arranged L-shaped connecting pipe III, and the rear end outlet of the ball valve and the multi-way switching valve II inlet pipe are connected through a vertically arranged L-shaped connecting pipe IV .

Example 1

As shown in FIG. 1, a main process module of a pressure reduction system including four main process pipelines includes:

As shown in Figures 2-1 and 3, each control valve group 4 has a symmetrical trapezoidal distribution. The specific design scheme is as follows:

A multi-way switching valve I is a five-way valve. The multi-port switching valve I includes a multi-port switching valve I inlet pipe 1 and four multi-port switching valves I outlet pipes 13 located below the multi-port switching valve I inlet pipe 1 and having a symmetrical distribution. Each multi-port switching valve I side of the outlet pipe 13 is provided with a switching valve element I2 (which is shown in FIG. 1 as 2A, 2B, 2C, 2D) to control its opening and closing. Four switching valve elements I2 are respectively used for four-way valves. Group switching, the top end of the inlet pipe 1 of the multi-way switching valve I is the inlet of the high-temperature and high-pressure medium.

As shown in Figures 2-1 and 4, a multi-port switching valve II is also a five-port valve. The multi-port switching valve II includes a multi-port switching valve II outlet pipe 6 and four multi-port switching valves II inlet pipes 14 located above the multi-port switching valve II outlet pipe 6 in a symmetrical distribution. Each multi-port switching valve Each side of the II inlet pipe 14 is provided with a switching valve element II5 that controls its opening and closing. Four switching valve elements II5 are used for switching the four-way valve group, respectively.

The bottom ends of the outlet pipes 13 of the multi-way switching valves I are connected to the top ends of the inlet pipes 14 of the corresponding multi-way switching valves II through a regulating valve group 4, respectively. The four-way regulating valve group 4 is completely the same. Each group of the regulating valve group 4 includes an angular cut-off valve 7, a pressure reducing regulating valve 9, and a ball valve 11 arranged in this order, and the multi-way switching valve I outlet pipe 13 and the angular shape Between the inlet of the shut-off valve 7, between the outlet of the angular shut-off valve 7 and the inlet of the pressure reducing regulating valve 9, between the outlet of the pressure reducing regulating valve 9 and the inlet of the ball valve 11, the The outlet of the ball valve 11 and the inlet pipe 14 of the multi-way switching valve II are connected through a connecting pipe 3 respectively.

The integrated decompression system distributed in a circumferential direction also includes a mechanical control system (not shown in the figure) and an intelligent control system (not shown in the figure). Each valve is provided with a valve for controlling its opening. The closed mechanical control system is used for controlling the operation of all mechanical control systems.

The vertical plane formed between the inlet pipe 1 of the multi-way switching valve I and the outlet pipe 6 of the multi-way switching valve II is a plane of symmetry, and the 4-way regulating valve group 4 is symmetrically distributed in pairs. The angle cut-off valve and the pressure reducing valve 9 are installed vertically, the ball valve 11 is installed horizontally, and the angle cut-off valve 7, the pressure reducing valve 9 and the ball valve 11 on the same regulating valve group 4 are located on the same vertical plane. The outlet pipe 13 of the multi-way switching valve I and the side inlet of the angle cut-off valve 7 are connected by a horizontally-shaped L-shaped connecting pipe I31, and the bottom end outlet of the angle cut-off valve 7 is connected to the The side inlets of the pressure reducing valve 9 are connected by a vertically arranged L-shaped connecting pipe II32. The bottom outlet of the pressure reducing valve 9 and the rear end inlet of the ball valve 11 are vertically arranged L The connecting pipe III33 is connected, and the front end outlet of the ball valve 11 and the inlet pipe 14 of the multi-way switching valve II are connected through a horizontally arranged L-shaped connecting pipe IV34. In addition, the angular cut-off valve 7, the pressure-reducing regulating valve 9 and the ball valve 11 of each control valve group 4 are respectively installed on the same horizontal plane (that is, each valve forms three horizontal planes).

The decompression system of this embodiment can meet the requirements of pressure regulation under high-temperature and high-pressure differential conditions, reduce thermal stress during the use of the device, and reduce the risks of valve cracking and stagnation to a certain extent.

Example 2

The difference from Embodiment 1 is shown in FIG. 2-2 (below, near the multi-way switching valve I is front, and near the multi-way switching valve II is back, the above is the top and the bottom is the bottom). The specific design scheme of the circumferentially distributed pressure reduction system is as follows:

A multi-way switching valve I is a five-way valve. The multi-way switching valve I includes a multi-way switching valve I inlet pipe 1 and four multi-way switching valve I outlet pipes 13 located below the multi-way switching valve I inlet pipe 1 and distributed in a circumferential direction, each multi-way switching On the side of the outlet pipe 13 of the valve I, a switching valve element I2 (which is shown in the figure as 2A, 2B, 2C, and 2D respectively) is installed to control its opening and closing. Four switching valve elements I2 are respectively used for the four-way valve. Group switching, the top end of the inlet pipe 1 of the multi-way switching valve I is the inlet of the high-temperature and high-pressure medium. A multi-way switching valve II, which is also a five-way valve. The multi-way switching valve II includes a multi-way switching valve II outlet pipe 6 and four multi-way switching valve II inlet pipes 14 located above the multi-way switching valve II outlet pipe 6 and distributed in a circumferential direction. Each multi-way switching A switching valve element II5 for controlling the opening and closing of the valve II inlet pipe 14 is installed on each side of the valve II, and the four switching valve elements II5 are used for switching the four-way valve group, respectively.

The bottom end of each multi-way switching valve I outlet pipe 13 is connected to the top of the corresponding multi-way switching valve II inlet pipe 14 through a regulating valve group 4 respectively. The four-way regulating valve group 4 is completely the same. Each group of the regulating valve group 4 includes an angular cut-off valve 7, a pressure reducing regulating valve 9, and a ball valve 11 arranged in this order, and the multi-way switching valve I outlet pipe 13 and the angular shape Between the inlet of the shut-off valve 7, between the outlet of the angular shut-off valve 7 and the inlet of the pressure reducing regulating valve 9, between the outlet of the pressure reducing regulating valve 9 and the inlet of the ball valve 11, the The outlet of the ball valve 11 and the inlet pipe 14 of the multi-way switching valve II are connected through a connecting pipe 3 respectively.

The integrated decompression system distributed in a circumferential direction also includes a mechanical control system (not shown in the figure) and an intelligent control system (not shown in the figure). Each valve is provided with a valve for controlling its opening. The closed mechanical control system is used for controlling the operation of all mechanical control systems.

Adopting a circumferential distribution scheme for the main process pipelines of each road can minimize pipeline stress. As shown in Figure 2-2 (below, near the multi-port switching valve I is front, and near the multi-port switching valve II is back, the above is top, and the bottom is bottom.), The specific design scheme is as follows: The straight line formed between the inlet pipe 1 of the switching valve I and the outlet pipe 6 of the multi-way switching valve II is the axis, and the 4-way regulating valve group 4 is distributed around this axis in the circumferential direction. The angle cut-off valve 7 and the ball valve 11 are installed horizontally, and the pressure reducing regulator valve 9 is installed vertically; the multi-way switching valve I outlet pipe 13 and the side inlet of the angle cut-off valve 7 are vertically installed. The provided L-shaped connecting pipe I31 is connected, and the rear end outlet of the angular cut-off valve 7 and the side inlet of the pressure reducing regulating valve 9 are connected through a horizontally arranged horizontal pipe connecting pipe II32. The outlet of the bottom end of the pressure regulating valve 9 and the front end of the ball valve 11 are connected through an L-shaped connecting pipe III33. The rear end of the ball valve 11 is connected to the inlet pipe 14 of the multi-way switching valve II. They are connected by a vertically arranged L-shaped connecting pipe IV34. The main body of the angle cut-off valve 7 and the pressure reducing control valve 9 of each control valve group 4 is located on the upper layer, and the ball valve 11 is located on the lower layer. This layered arrangement makes the space arrangement more reasonable.

The operating process of this embodiment: The high-temperature and high-pressure medium enters the pressure reducing system from the multi-way switching valve I inlet pipe 1 of the multi-way switching valve I, and selectively flows into one or more of the four-way regulating valve groups 4 through the switching valve element I2. After depressurizing by the regulating valve group 4, it is collected at the outlet pipe 6 of the multi-way switching valve II of the multi-way switching valve II through the switching valve element II5 and finally flows out.

The integrated decompression system with a circumferentially distributed installation in this embodiment can meet the requirements of pressure regulation under high temperature and high pressure differential conditions, reduce thermal stress during the use of the device, reduce risks such as valve cracking and stagnation, and greatly improve the process. The operating cycle life of the device.

Example 3

The difference from Embodiment 2 is shown in Fig. 2-3 (described below, near the multi-port switching valve I is front, and near the multi-port switching valve II is back, the above is top, and the bottom is bottom.) The specific design scheme of the pressure reduction system installed in a circumferential distribution is as follows: the straight line formed between the inlet pipe 1 of the multi-way switching valve I and the outlet pipe 6 of the multi-way switching valve II is used as an axis, and the 4-way regulating valve group is 4 circumferentially Distributed around this axis. The angle cut-off valve 7, pressure reducing valve 9 and ball valve 11 are all installed horizontally; an L-shaped vertical arrangement is provided between the multi-way switching valve I outlet pipe 13 and the side inlet of the angle cut-off valve 7. The connecting pipe I31 is connected, and the rear end outlet of the angle cut-off valve 7 and the side inlet of the pressure reducing regulating valve 9 are connected through a vertically-shaped L-shaped connecting pipe II32. The pressure reducing regulating valve 9 The rear end outlet of the ball valve 11 is connected to the front end inlet of the ball valve 11 through a horizontally arranged horizontal tubular connecting pipe III33. The rear end outlet of the ball valve 11 and the multi-way switching valve II inlet pipe 14 are vertically arranged. The L-shaped connecting pipe IV34 is connected. The angle cut-off valve 7 of each control valve group 4 is located on the upper level, and the main body of the pressure reducing control valve 9 and the ball valve 11 is on the next level (and the same level). This layered arrangement makes the space arrangement more reasonable.

Example 4

The difference from Embodiment 2 is shown in Figs. 2-4 (described below, near the multi-port switching valve I is front, and near the multi-port switching valve II is back, the above is top, and the bottom is bottom.) The specific design scheme of the pressure reduction system installed in a circumferential distribution is as follows: the straight line formed between the inlet pipe 1 of the multi-way switching valve I and the outlet pipe 6 of the multi-way switching valve II is used as an axis, and the 4-way regulating valve group is 4 circumferentially Distributed around this axis. The angle cut-off valve 7, pressure reducing valve 9 and ball valve 11 are all installed horizontally; an L-shaped vertical arrangement is provided between the multi-way switching valve I outlet pipe 13 and the side inlet of the angle cut-off valve 7. The connecting pipe I31 is connected, and the rear end outlet of the angle cut-off valve 7 and the side inlet of the pressure reducing regulating valve 9 are connected through a vertically-shaped L-shaped connecting pipe II32. The pressure reducing regulating valve 9 The rear end outlet of the ball valve 11 is connected to the front end inlet of the ball valve 11 through a horizontally arranged L-shaped connecting pipe III33. The pressure reducing valve 9 (the rear end outlet of the pressure reducing valve 9 is connected to the ball valve 11). The main body runs uniformly and in parallel, the rear end outlet of the ball valve 11 is located on the side facing the angle cut-off valve 7) The rear end outlet of the ball valve 11 is connected to the front inlet of the ball valve 11 through a horizontally-shaped L-shaped connecting pipe III33 The rear end outlet of the ball valve 11 and the multi-way switching valve II inlet pipe 14 are connected through an L-shaped connecting pipe IV34 provided vertically. The angle cut-off valve 7 of each control valve group 4 is located on the upper level, and the main body of the pressure reducing control valve 9 and the ball valve 11 is on the next level (and the same level). This layered arrangement makes the space arrangement more reasonable.

Example 5

Different from the embodiments 1-4, the multi-way switching valve I and the multi-way switching valve II are both four-way valves, six-way valves, seven-way valves, or eight-way valves, that is, the multi-way switching valves. There are 3 or 5 or 6 or 7 outlet pipes 13 distributed circumferentially below the inlet pipe 1 of the multi-way switching valve I, and the inlet pipe 14 of the multi-way switching valve II and the multi-way switching valve I The number of the outlet pipes is the same, and the circumferential direction is distributed above the outlet pipe 6 of the multi-way switching valve II.

The above are only preferred embodiments of the invention, and are not intended to limit the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the invention should be included in the protection of the invention. Within range.

Claims (11)

The main process module of a skid-mounted decompression system is characterized by: The main process module includes multiple main process pipelines, the main process pipeline is provided with a pressure reducing valve group, and the N main process pipelines are arranged according to the principle of stress minimization in a three-dimensional space; The functions of each of the main process pipelines are exactly the same, and each of them is a backup line to each other, and its function satisfies at least one of the following requirements: one is opened for multiple backups or is activated at the same time. The main process module of a skid-mounted pressure reduction system according to claim 1, wherein the main process module comprises N main process pipelines, and N is a positive integer of 2-7. The main process module of a skid-mounted pressure reduction system according to claim 1, wherein: The pressure reducing valve group includes an automatic valve, and the main process module is also provided with a mechanical control system. The mechanical control system provides a torque required by each of the automatic valves under a power source, and transmits the torque to the valve body through a valve stem. The structure controls the opening and closing of each automatic valve. The main process module of a skid-mounted pressure reduction system according to claim 2, characterized in that: The N-way main process pipeline is located between the inlet and the outlet of the pressure reduction system, and is symmetrically distributed or uniformly distributed in the circumferential direction with the inlet and outlet connections of the pressure reduction system as the center line. The main process module of a skid-mounted pressure reduction system according to claim 4, wherein: The inlets of the N main process pipelines are connected together through one pipeline, and the outlets are connected together through another pipeline; or An inlet of the N main process pipeline is connected through a multi-way switching valve, and an outlet is connected through another multi-way switching valve. The main process module of a skid-mounted pressure reduction system according to claim 5, wherein: The inlets of the N main process pipelines are connected through a multi-port switching valve I, and the outlets are connected through a multi-port switching valve II, and are distributed circumferentially; The multi-way switching valve I includes a multi-way switching valve I inlet pipe and a plurality of multi-way switching valve I outlet pipes located below the multi-way switching valve I inlet pipe and distributed in a circumferential direction, each of the multi-way switching valves A switching valve element I for controlling opening and closing is installed on each side of the I outlet pipe, and the top end of the inlet pipe of the multi-way switching valve I is an inlet of the medium; The multi-way switching valve II includes a multi-way switching valve II outlet pipe and a plurality of multi-way switching valve II inlet pipes located above the multi-way switching valve II outlet pipe and distributed in a circumferential direction, each of the multi-way switching valves A switching valve element II for controlling the opening and closing of the inlet pipe is installed on the side of the II inlet pipe; the bottom end of each of the multi-way switching valve I outlet pipes passes through the main process pipeline and the corresponding multi-way switching valve II respectively The tops of the inlet pipes are connected; The medium enters through the inlet pipe of the multi-way switching valve I, and selectively flows into one or more of the N main process pipelines according to the opening and closing of the switching valve element I. After decompression, it passes through the The switching valve element II converges at the outlet pipe of the multi-way switching valve II, and finally flows out. The main process module of a skid-mounted pressure reduction system according to claim 6, wherein: The pressure reducing valve group includes a pressure reducing valve front cut-off valve, a pressure reducing regulating valve and a pressure reducing valve rear shut-off valve, the multi-way switching valve I outlet pipe and the pressure reducing valve front cut-off valve are sequentially arranged. Between the inlets of the pressure reducing valve, the outlet of the shut-off valve before the pressure reducing valve and the inlet of the pressure reducing valve, and between the outlet of the pressure reducing valve and the inlet of the pressure reducing valve after the shut-off valve. 2. The outlet of the shut-off valve behind the pressure-reducing regulating valve and the inlet pipe of the multi-way switching valve II are respectively connected through a connecting pipe. The main process module of a skid-mounted pressure reduction system according to claim 6, wherein the multi-port switching valve I is a three-way valve, a four-way valve, a five-way valve, a six-way valve, or a seven-way valve. At least one of eight-way valve; The number of outlet pipes of the multi-way switching valve I is equal to the number of inlet pipes of the multi-way switching valve II. The main process module of a skid-mounted pressure reduction system according to claim 7, wherein: The front cut-off valve of the pressure-reducing regulating valve is an angular cut-off valve, the rear cut-off valve of the pressure-reducing regulating valve is a ball valve, the angle cut-off valve and the ball valve are both installed horizontally, and the pressure-reducing regulating valve is installed vertically; An outlet pipe of the multi-way switching valve I and a side inlet of the angle cut-off valve are connected through an L-shaped connecting pipe I arranged vertically, and a rear end outlet of the angle cut-off valve is adjusted to the pressure reduction. The side inlets of the valve are connected through a horizontally arranged horizontal tubular connecting pipe II, and the bottom outlet of the pressure reducing regulating valve is connected with the front end inlet of the ball valve through a vertically arranged L-shaped connecting pipe III. A rear end outlet of the ball valve and an inlet pipe of the multi-way switching valve II are connected through an L-shaped connecting pipe IV provided vertically. The main process module of a skid-mounted pressure reduction system according to claim 7, wherein: The front cut-off valve of the pressure-reducing regulating valve is an angular cut-off valve, the rear cut-off valve of the pressure-reducing regulating valve is a ball valve, and the angle cut-off valve, the pressure-reducing regulating valve and the ball valve are all installed horizontally; An outlet pipe of the multi-way switching valve I and a side inlet of the angle cut-off valve are connected through an L-shaped connecting pipe I provided vertically, and a rear end outlet of the angle cut-off valve is connected to the pressure reducing regulating valve. The side inlets are connected by a vertically-shaped L-shaped connecting pipe II, and the rear end outlet of the pressure reducing valve and the front-end inlet of the ball valve are connected by a horizontally arranged horizontal tubular connecting pipe III. The rear end outlet of the ball valve and the inlet pipe of the multi-way switching valve II are connected through an L-shaped connecting pipe IV which is vertically arranged. The main process module of a skid-mounted pressure reduction system according to claim 7, wherein: The front cut-off valve of the pressure-reducing regulating valve is an angular cut-off valve, the rear cut-off valve of the pressure-reducing regulating valve is a ball valve, and the angle cut-off valve, the pressure-reducing regulating valve and the ball valve are all installed horizontally; An outlet pipe of the multi-way switching valve I and a side inlet of the angle cut-off valve are connected through an L-shaped connecting pipe I provided vertically, and a rear end outlet of the angle cut-off valve is connected to the pressure reducing regulating valve. The side inlets are connected by an L-shaped connecting pipe II arranged vertically, and the rear-end outlet of the pressure reducing valve and the front-end inlet of the ball valve are connected by a horizontally arranged L-shaped connecting pipe III. The rear end outlet of the pressure reducing valve and the front end inlet of the ball valve are connected through a horizontally arranged L-shaped connecting pipe III. The rear end outlet of the ball valve and the inlet pipe of the multi-way switching valve II are connected by a vertical pipe. The straight L-shaped connecting pipe IV is connected.

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