TWI704009B - Oil-gas separation system and its use - Google Patents

Abstract

An oil-gas separation system and its use are provided. The oil-gas separation system includes two oil-gas separating devices and a tandem connecting device. Each oil-gas separating device includes an upper chamber, a cylindric chamber, and a lower chamber. The cylindric chamber is disposed under the upper chamber and includes a shell and a plurality of straight tubes. The inner space of the straight tube is connected with the inner space of the upper chamber and isn’t connected with the inner space of the shell. The lower chamber is disposed under the cylindric chamber, wherein the inner space of the straight tube isn’t connected with the inner space of the lower chamber. The tandem connecting device is disposed between the lower chambers of the two oil and gas separating devices and is respectively connected with the inner space of the lower chambers of the two oil-gas separating devices via tandem connecting ports.

Description

Oil and gas separation system and its use

The invention relates to an oil and gas separation system and its use.

Coal, biomass, and waste are often used for combustion to generate heat. Generally, syngas is generated through the gasification of coal, biomass, and waste. In addition to syngas, a mixed gas containing gaseous tar is also generated during the process of oil and gas separation. The tar obtained contains many aromatic compounds and can be used as an important raw material for the chemical industry.

One of the common methods of oil and gas separation is to use a coiled tube cooler to condense the gas phase tar in the mixed gas into a liquid state. However, because of the high viscosity of liquid tar, it is easy to adhere to the inner wall of the coil of the coil cooler, and the coil is difficult to clean and maintain due to its bending characteristics.

In view of this, the purpose of the present invention is to provide an oil-gas separation system, which can overcome the above-mentioned problem of difficult cleaning and maintenance, and is easy to disassemble and collect tar.

Another object of the present invention is to provide an application of an oil-gas separation system, which is used to separate tar from mixed gas, which can overcome the above-mentioned problems.

The oil and gas separation system of the present invention includes two oil and gas separation devices and a series device. Each oil-gas separation device includes an upper cavity, a cylindrical cavity, and a lower cavity. The upper cavity contains a top port. The cylindrical cavity is arranged below the upper cavity and includes a shell and a plurality of straight pipes. The shell has a cylindrical outer wall and top and bottom walls located at both ends of the cylindrical outer wall. The cylindrical outer wall includes an upper through opening and a lower through opening. A plurality of straight pipes are arranged in the shell, and the two opposite upper and lower ports of each straight pipe are respectively connected to the outside of the top wall and the bottom wall. The inside of the straight pipe and the inside of the upper cavity are connected through the upper port, and are not connected with The inside of the shell is connected. The lower cavity is arranged under the cylindrical cavity and includes an inlet of the lower cavity and a serial port. The inside of the straight pipe and the inside of the lower cavity are communicated through the lower port and the inlet of the lower cavity. The series device is arranged between the lower cavities of the two oil and gas separation devices, and respectively communicates with the inside of the lower cavities of the two oil and gas separation devices through the series ports.

In an embodiment of the present invention, each oil-gas separation device includes a bottom cavity disposed below the lower cavity, the bottom cavity includes an inlet of the bottom cavity, the lower cavity further includes an outlet of the lower cavity, and the inside and the bottom of the bottom cavity The inside of the cavity is respectively communicated with the inlet of the bottom cavity and the outlet of the lower cavity.

In the embodiment of the present invention, the series device is a pipe.

In the embodiment of the present invention, the tandem device has corners, and the sharp corners of the corners are upward.

In the embodiment of the present invention, the series device has an arc, and the arc of the arc is upward.

In the embodiment of the present invention, the tandem device and the lower cavity are integrally formed.

In an embodiment of the present invention, the oil-gas separation system further includes a thermal insulation device surrounding the series device.

In an embodiment of the present invention, the oil-gas separation system further includes a heating device, which is arranged outside the series device for heating the series device.

In the embodiment of the present invention, the upper cavity and the cylindrical cavity, the cylindrical cavity and the lower cavity, and the lower cavity and the tandem device are respectively joined with oil and gas separable.

The oil and gas separation system of the present invention is preferably used for separating oil and gas from tar from mixed gas. However, in different embodiments, it can also be used to separate other gas mixtures composed of substances with different boiling points.

As shown in the embodiment shown in FIG. 1, the oil and gas separation system 900 of the present invention includes two oil and gas separation devices 700 and a series device 800. Each oil-gas separation device 700 includes an upper cavity 100, a cylindrical cavity 200, and a lower cavity 300. The upper cavity 100 includes a top port 101. In a preferred embodiment, in order to facilitate cleaning of parts and other reasons, the upper cavity 100 and the cylindrical cavity 200, the cylindrical cavity 200 and the lower cavity 300, the lower cavity 300 and the series device 800 are separable respectively地接。 Ground joint. Among them, the joining can be achieved through threaded butt, clamp clamping or screw locking.

As shown in the embodiment shown in FIGS. 1 and 2, the cylindrical cavity 200 is disposed under the upper cavity 100 and includes a housing 210 and a plurality of straight tubes 220. The housing 210 has a cylindrical outer wall 211 and a top wall 212 and a bottom wall 213 located at both ends of the cylindrical outer wall 211. The cylindrical outer wall 211 includes an upper opening 211A and a lower opening 211B. A plurality of straight pipes 220 are disposed in the housing 210, and two opposite upper ports 220A and lower ports 220B of each straight pipe 220 are respectively communicated with the outer sides of the top wall 212 and the bottom wall 213. In this way, the inside of the straight pipe 220 is communicated with the inside of the upper cavity 100 through the upper port 220 and not communicated with the inside of the housing 210. Viewed from different angles, the straight pipe 220 is a pipe connecting the outer sides of the top wall 212 and the bottom wall 213 of the housing 210. The inside of the housing 210 and the inside of the straight pipe 220 are not connected to each other. Among them, the plurality of straight pipes 220 are preferably perpendicular to the horizontal plane.

As shown in the embodiment shown in FIG. 1, the lower cavity 300 is disposed under the cylindrical cavity 200 and includes a lower cavity inlet 310 and a serial port 320. The inside of the straight pipe 220 and the inside of the lower cavity 300 pass through the lower port 220B ( See Figure 2) and the lower cavity inlet 310 is connected. The series device 800 is arranged between the lower cavities 300 of the two oil and gas separation devices 700 and communicates with the insides of the lower cavities 300 of the two oil and gas separation devices 700 through the series ports 320 respectively.

During operation, a cooling fluid such as water enters the housing 210 through one of the upper port 211A and the lower port 211B (preferably from the lower port 211B), flows through the outer side of the plurality of straight pipes 220, and passes from the upper The other of the port 211A and the lower port 211B (preferably the upper port 211A) leaves. The mixed gas containing the substance to be separated from the gas phase enters the oil and gas separation system 900 through the top port 101, passes through the inner space of the upper cavity 100, and is dispersed into a plurality of straight pipes 220. At this time, by controlling the feed rate and temperature of the cooling fluid, the temperature in the straight pipe 220 can be made slightly lower than the boiling point of the substance to be separated, so that the substance to be separated is at least partially condensed into a liquid, which is lowered by gravity. Separated from mixed gas.

The mixed gas containing the uncondensed substances to be separated passing through one of the two oil-gas separation devices 700 can enter the other oil-gas separation device 700 through the series device 800 to perform cooling oil-gas separation. Accordingly, the contact area for cooling can be increased, and the oil-gas separation effect can be improved. Furthermore, the substance to be separated for oil and gas is condensed inside the straight pipe 220, and the vertical arrangement and non-curved surface of the straight pipe 200 help the substance to be separated for oil and gas to be condensed to be lowered by gravity, which is also conducive to subsequent cleaning and maintenance. In addition, although the coiled tube cooler has a larger cooling contact area at the same height, the series design can increase the cooling contact area.

As shown in the embodiment shown in FIG. 1, each oil-gas separation device 700 preferably includes a bottom cavity 400 disposed under the lower cavity 300 for collecting the condensed substances to be separated into liquid. More specifically, the bottom cavity 400 includes a bottom cavity inlet 410, and the lower cavity 300 further includes a lower cavity outlet 330. The inside of the bottom cavity 300 and the inside of the lower cavity 400 pass through the bottom cavity inlet 410 and the lower cavity respectively. The cavity outlet 330 is in communication. Thereby, the substance to be separated into a liquid can flow directly into the bottom cavity 400 and be collected. The bottom cavity 400 is based on a detachable design, which can be filled with the substance to be separated from the gas and replaced by another without interrupting the whole Oil and gas separation operation. In addition, the bottom cavity 400 may be further pre-filled with an appropriate solvent for dissolving the substances to be separated from oil and gas with a relatively high viscosity.

In the embodiment shown in Fig. 1, the series device 800 is a straight pipe. In different embodiments, based on considerations such as ease of operation or efficiency improvement, the tandem device 800 may be a pipe with curved corners and the sharp corners upward as shown in FIG. 3, or an arc with an arc as shown in FIG. The arc upward pipe. More specifically, the curved or arc-shaped upward design allows the oil and gas separation substance to be condensed into liquid in the series device 800 to flow down to the bottom cavities 400 on both sides as quickly as possible to avoid accumulation in the series device 800.

In the foregoing embodiment, the lower cavity 300 and the series device 800 are detachably joined with oil and gas. However, in the embodiment shown in FIG. 5, the series device 800 and the lower cavity 300 can be integrally formed based on design, manufacturing or operation.

In the embodiment shown in FIG. 6, in order to reduce the condensation of substances to be separated into liquid in the series device 800, the oil and gas separation system 900 may further include a thermal insulation device 610 such as thermal insulation wool surrounding the series device 800. Alternatively, as shown in the embodiment shown in FIG. 7, the oil-gas separation system 900 may further include a heating device 620 such as an electric heating pad, which is arranged outside the series device 800 for heating the series device 800.

Although the foregoing description and drawings have disclosed the preferred embodiments of the present invention, it must be understood that various additions, many modifications and substitutions may be used in the preferred embodiments of the present invention without departing from the scope of the attached patent application. The spirit and scope of the principles of the present invention. Those skilled in the art familiar with the technical field of the present invention will appreciate that the present invention can be used to modify many forms, structures, arrangements, proportions, materials, elements and components. Therefore, the embodiments disclosed herein should be regarded as illustrating the present invention, rather than limiting the present invention. The scope of the present invention shall be defined by the scope of the attached patent application, and cover its legal equivalents, and is not limited to the previous description.

100: upper cavity 101: Top port 200: cylindrical cavity 210: Shell 211: cylindrical outer wall 211A: Shangtong Port 211B: Lower port 212: top wall 213: Bottom Wall 220: straight pipe 220A: Upper port 220B: lower port 300: Lower cavity 310: Lower cavity entrance 320: serial port 330: Lower cavity exit 400: bottom cavity 410: bottom cavity entrance 610: heat preservation device 620: heating device 700: Oil and gas separation device 800: tandem device 900: Oil and gas separation system

Figure 1 is a schematic diagram of an embodiment of the oil-gas separation system of the present invention.

Figure 2 is a schematic diagram of an embodiment of the oil and gas separation device in the oil and gas separation system of the present invention.

Fig. 3 is a schematic diagram of different embodiments with curved corners of the series device in the oil-gas separation system of the present invention.

Fig. 4 is a schematic diagram of different embodiments of the series device having an arc in the oil-gas separation system of the present invention.

Fig. 5 is a schematic diagram of different embodiments in which the series device and the lower cavity of the oil-gas separation system of the present invention are integrally formed.

Fig. 6 is a schematic diagram of different embodiments of the oil-gas separation system of the present invention further having a heat preservation device.

Fig. 7 is a schematic diagram of different embodiments of the oil-gas separation system of the present invention further having a heating device.

100: upper cavity

101: Top port

200: cylindrical cavity

210: Shell

211: cylindrical outer wall

211A: Shangtong Port

211B: Lower port

212: top wall

213: Bottom Wall

220: straight pipe

300: Lower cavity

310: Lower cavity entrance

320: serial port

330: Lower cavity exit

400: bottom cavity

410: bottom cavity entrance

700: Oil and gas separation device

800: tandem device

900: Oil and gas separation system

Claims (9)

An oil-gas separation system includes: two oil-gas separation devices, each oil-gas separation device includes: an upper cavity including a top opening; a cylindrical cavity arranged below the upper cavity, including: a shell, It has a cylindrical outer wall and a top wall and a bottom wall at both ends of the cylindrical outer wall. The cylindrical outer wall includes an upper opening and a lower opening; a plurality of straight pipes are arranged in the shell, and each Two opposite upper port and lower port communicate with the outer side of the top wall and the bottom wall respectively, and the inside of the straight pipe and the inside of the upper cavity are communicated through the upper port, and not communicated with the inside of the housing; The lower cavity is arranged under the cylindrical cavity and includes a lower cavity inlet and a series port. The inside of the straight pipe and the inside of the lower cavity are connected through the lower port and the lower cavity inlet; a series device , Arranged between the lower cavities of the two oil and gas separation devices, and respectively communicate with the inside of the lower cavities of the two oil and gas separation devices through the series port; wherein, the upper cavity and the cylindrical cavity, the The cylindrical cavity and the lower cavity, and the lower cavity and the series device are respectively detachably joined. The oil and gas separation system according to claim 1, wherein each oil and gas separation device includes a bottom cavity disposed below the lower cavity, the bottom cavity includes a bottom cavity inlet, and the lower cavity further includes a lower cavity Outlet, the inside of the bottom cavity and the inside of the lower cavity are respectively communicated through the bottom cavity inlet and the lower cavity outlet. The oil and gas separation system according to claim 1, wherein the series device is a pipe fitting. The oil-gas separation system according to claim 3, wherein the series device has a bend, and the sharp corner of the bend is upward. The oil-gas separation system according to claim 3, wherein the series device has an arc, and the arc of the arc is upward. The oil and gas separation system according to claim 1, wherein the series device and the lower cavity are integrally formed. The oil-gas separation system according to claim 1, further comprising a heat preservation device surrounding the series device. The oil and gas separation system according to claim 1, further comprising a heating device arranged outside the series device for heating the series device. An application of the oil and gas separation system according to any one of claims 1 to 8, which is used to separate a tar from oil and gas in a mixed gas.

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