阅读说明：本技术 一种用于天然气的动态模拟系统及方法 (Dynamic simulation system and method for natural gas ) 是由 王勇 杨光 豆锋 张新友 廖烜华 李国明 张玉玺 王浩 郑静 张会平 于 2020-07-03 设计创作，主要内容包括：本发明涉及天然气技术领域,具体涉及一种用于天然气的动态模拟系统及方法,通过原料天然气进入天然气分离单元进行分离,分离的气体通过天然气分离单元的气体出口进入天然气冷却单元进行冷却,天然气分离单元分离出的液体通过管路进入第二混合器,天然气冷却单元内的液体也通过管路进入第二混合器,通过第二混合器混合后进入重烃分离单元进行分离,然后得到气体轻烃,分离的液体进入下游管路进行处理,液位控制器控制天然气分离单元内的液位,温度控制器和压力控制器控制天然气冷却单元的温度及压力,进而完成了天然气的回收及处理,进而实现实际天然气回收处理系统的动态操作,节省了实际天然气回收处理系统的动态操作的人工投入及成本投入。(The invention relates to the technical field of natural gas, in particular to a dynamic simulation system and a dynamic simulation method for natural gas, which are characterized in that raw natural gas enters a natural gas separation unit for separation, the separated gas enters a natural gas cooling unit for cooling through a gas outlet of the natural gas separation unit, liquid separated by the natural gas separation unit enters a second mixer through a pipeline, liquid in the natural gas cooling unit also enters the second mixer through the pipeline, the liquid is mixed by the second mixer and then enters a heavy hydrocarbon separation unit for separation, then gas light hydrocarbon is obtained, the separated liquid enters a downstream pipeline for treatment, a liquid level controller controls the liquid level in the natural gas separation unit, a temperature controller and a pressure controller control the temperature and the pressure of the natural gas cooling unit, thereby completing the recovery and the treatment of the natural gas and further realizing the dynamic operation of an actual natural gas recovery treatment system, the labor investment and the cost investment of the dynamic operation of the actual natural gas recovery processing system are saved.)

1. A dynamic simulation system for natural gas, characterized by: comprises that

The natural gas separation unit comprises a separated gas outlet and a separated liquid outlet;

the liquid level controller (19), the liquid level controller (19) is set up in the natural gas separation unit;

the natural gas cooling unit comprises a natural gas cooling unit inlet and a natural gas cooling unit outlet, and the natural gas cooling unit inlet is communicated with the gas outlet of the natural gas separation unit through a pipeline;

a temperature controller (20), the temperature controller (20) being disposed within the natural gas cooling unit;

a pressure controller (21), the pressure controller (21) also being provided within the natural gas cooling unit;

the second mixer (12) comprises a second mixer first inlet, a second mixer second inlet and a second mixer outlet, the second mixer first inlet of the second mixer (12) is communicated with the outlet of the natural gas cooling unit through a pipeline, and the second mixer second inlet of the second mixer (12) is communicated with the liquid outlet of the natural gas separation unit through a pipeline;

heavy hydrocarbon separation unit, including heavy hydrocarbon separation unit entry, heavy hydrocarbon separation unit gas outlet and heavy hydrocarbon separation unit liquid outlet, the second blender export intercommunication of heavy hydrocarbon separation unit's heavy hydrocarbon separation unit entry through pipeline and second blender (12), the gas of heavy hydrocarbon separation unit separation passes through heavy hydrocarbon separation unit gas outlet and discharges, the liquid of heavy hydrocarbon separation unit separation passes through heavy hydrocarbon separation unit liquid outlet and discharges.

2. A dynamic simulation system for natural gas according to claim 1, characterized by: the natural gas separation unit comprises a first raw gas input pipeline (1), a second raw gas input pipeline (2), a first throttle valve (3), a first mixer (4), a mixed gas input pipeline (5) and a gas-liquid separator (6), wherein the first raw gas input pipeline (1) and the second raw gas input pipeline (2) are communicated with an inlet of the first mixer (4), an outlet of the first mixer (4) is communicated with the gas-liquid separator (6) through the mixed gas input pipeline (5), the first throttle valve (3) is connected to the first raw gas input pipeline (1) and the second raw gas input pipeline (2), a gas outlet of the gas-liquid separator (6) is communicated with a natural gas cooling unit through a pipeline, a liquid outlet of the gas-liquid separator (6) is communicated with a second mixer second inlet of the second mixer (12) through a pipeline, and a pipeline for communicating the gas-liquid separator (6) with the second mixer (12) is also connected with a second throttling valve (7), and a liquid level controller (19) is also connected in parallel between the second throttling valve (7) and the gas-liquid separator (6).

3. A dynamic simulation system for natural gas according to claim 2, characterized by: the natural gas cooling unit comprises a first cooler (8), a second cooler (9), a low-temperature separator (10) and a third throttling valve (11), wherein an inlet of the first cooler (8) is communicated with a gas outlet of the gas-liquid separator (6) through a pipeline, an outlet of the first cooler (8) is communicated with an inlet of the second cooler (9) through a pipeline, an outlet of the second cooler (9) is communicated with the low-temperature separator (10) through a pipeline, a gas outlet of the low-temperature separator (10) is communicated with the first cooler (8) through a pipeline and then conveys gas to a downstream pipeline through a pipeline, a liquid outlet of the low-temperature separator (10) is communicated with a first inlet of a second mixer (12) through a pipeline, the third throttling valve (11) is connected to a pipeline through which a liquid outlet of the low-temperature separator (10) is communicated with a first inlet of a second mixer of the second mixer (12), and a pipeline for communicating the second cooler (9) with the low-temperature separator (10) is also connected with a temperature controller (20) in parallel, and a pressure controller (21) is also connected between the low-temperature separator (10) and the third throttle valve (11) in parallel.

4. A dynamic simulation system for natural gas according to claim 1, characterized by: heavy hydrocarbon separation unit include fourth choke valve (13), heater (14) and rectifying column (15), the second blender export intercommunication of pipeline and second blender (12) is passed through to heater (14) one end, fourth choke valve (13) are connected on the pipeline of the second blender export intercommunication of heater (14) and second blender (12), the other end of heater (14) passes through pipeline and rectifying column (15) intercommunication, the gas outlet of rectifying column (15) has the condensation mechanism through the tube coupling, gaseous entering low reaches pipeline after passing through the condensation mechanism, the liquid outlet of rectifying column (15) has the intensification mechanism through the tube coupling, the liquid of the liquid outlet exhaust of rectifying column (15) gets into low reaches pipeline through the pipeline after the intensification mechanism.

5. A dynamic simulation system for natural gas according to claim 4, characterized in that: the condensing mechanism include condenser and fifth choke valve (16), the gas outlet of rectifying column (15) passes through the entry intercommunication of pipeline and condenser, condenser liquid outlet still passes through pipeline and rectifying column (15) intercommunication, condenser gas outlet passes through pipeline and low reaches pipeline intercommunication, fifth choke valve (16) are connected on the pipeline of condenser gas outlet and low reaches pipeline intercommunication.

6. A dynamic simulation system for natural gas according to claim 4, characterized in that: the heating mechanism is a reboiler, a liquid outlet of the rectifying tower (15) is communicated with an inlet of the reboiler through a pipeline, a gas outlet of the reboiler is further communicated with the rectifying tower (15) through a pipeline, and a liquid outlet of the reboiler is communicated with a downstream pipeline through a pipeline.

7. A dynamic simulation system method for natural gas comprising a dynamic simulation system for natural gas as claimed in any one of claims 1 to 6, characterized in that: comprises the following steps

The method comprises the following steps: the raw material natural gas is separated by a natural gas separation unit, and a liquid level controller (19) controls the liquid level separated in the natural gas separation unit;

step two: on the basis of the step one, the gas separated by the natural gas separation unit enters a natural gas cooling unit for cooling, and the temperature and the pressure of the natural gas cooling unit are controlled by the natural gas cooling unit through a temperature controller (20) and a pressure controller (21);

step three: on the basis of the second step, the liquid separated in the first step and the liquid in the second step are mixed through a second mixer (12), then the mixed liquid enters a heavy hydrocarbon separation unit to be separated to obtain gas light hydrocarbon, and the separated liquid enters a downstream pipeline to be treated.

Technical Field

The invention relates to the technical field of natural gas, in particular to a dynamic simulation system and method for natural gas.

Background

In general, the simulation of natural gas is performed in a steady-state system, and the water dew point of natural gas is realized through inputting the components, flow, temperature and pressure of natural gas and through a series of equipment such as pipelines, containers, towers, pumps and the like, so as to meet the pipeline transportation requirement. However, the field working condition is complex, the gas quantity of the natural gas can generate uncontrollable factors such as instantaneous fluctuation, and the like, and because the natural gas steady-state research is generally carried out at home at present, systematic research is lacked for a dynamic simulation system method. The invention aims to provide a system and a method for dynamically simulating natural gas.

Disclosure of Invention

The invention overcomes the defects of the prior art, provides a dynamic simulation system and a dynamic simulation method for natural gas, and particularly has the characteristics of realizing dynamic operation in the whole system by adding a liquid level controller, a temperature controller and a pressure controller, and saving labor and cost.

The technical problem solved by the invention can be realized by adopting the following technical scheme:

a dynamic simulation system for natural gas comprising

The natural gas separation unit comprises a separated gas outlet and a separated liquid outlet;

the liquid level controller is arranged in the natural gas separation unit;

the natural gas cooling unit comprises a natural gas cooling unit inlet and a natural gas cooling unit outlet, and the natural gas cooling unit inlet is communicated with the gas outlet of the natural gas separation unit through a pipeline;

the temperature controller is arranged in the natural gas cooling unit;

the pressure controller is also arranged in the natural gas cooling unit;

the second mixer comprises a second mixer first inlet, a second mixer second inlet and a second mixer outlet, the second mixer first inlet of the second mixer is communicated with the outlet of the natural gas cooling unit through a pipeline, and the second mixer second inlet of the second mixer is communicated with the liquid outlet of the natural gas separation unit through a pipeline;

heavy hydrocarbon separation unit, including heavy hydrocarbon separation unit entry, heavy hydrocarbon separation unit gas outlet and heavy hydrocarbon separation unit liquid outlet, the second blender export intercommunication of heavy hydrocarbon separation unit's heavy hydrocarbon separation unit entry through pipeline and second blender, the gas of heavy hydrocarbon separation unit separation passes through the gas outlet of heavy hydrocarbon separation unit and discharges, the liquid of heavy hydrocarbon separation unit separation passes through heavy hydrocarbon separation unit liquid outlet and discharges.

The natural gas separation unit comprises a first raw material gas input pipeline, a second raw material gas input pipeline, a first throttle valve, a first mixer, a mixed gas input pipeline and a gas-liquid separator, wherein the first raw material gas input pipeline and the second raw material gas input pipeline are both communicated with an inlet of the first mixer, an outlet of the first mixer is communicated with the gas-liquid separator through the mixed gas input pipeline, the first raw material gas input pipeline and the second raw material gas input pipeline are both connected with a first throttle valve, a gas outlet of the gas-liquid separator is communicated with the natural gas cooling unit through a pipeline, a liquid outlet of the gas-liquid separator is communicated with a second inlet of a second mixer of the second mixer through a pipeline, and a pipeline for communicating the gas-liquid separator with the second mixer is also connected with a second throttling valve, and a liquid level controller is also connected in parallel between the second throttling valve and the gas-liquid separator.

The natural gas cooling unit comprises a first cooler, a second cooler, a low-temperature separator and a third throttle valve, wherein an inlet of the first cooler is communicated with a gas outlet of the gas-liquid separator through a pipeline, an outlet of the first cooler is communicated with an inlet of the second cooler through a pipeline, an outlet of the second cooler is communicated with the low-temperature separator through a pipeline, a gas outlet of the low-temperature separator is communicated with the first cooler through a pipeline and then conveys gas to a downstream pipeline through a pipeline, a liquid outlet of the low-temperature separator is communicated with a first inlet of a second mixer of the second mixer through a pipeline, the third throttle valve is connected to a pipeline through which a liquid outlet of the low-temperature separator is communicated with a first inlet of the second mixer, and a temperature controller is also connected in parallel on a pipeline communicated with the low-temperature separator by the second cooler, and a pressure controller is also connected in parallel between the low-temperature separator and the third throttle valve.

Heavy hydrocarbon separation unit include the fourth choke valve, heater and rectifying column, the second blender export intercommunication of pipeline and second blender is passed through to heater one end, the fourth choke valve is connected on the pipeline of the second blender export intercommunication of heater and second blender, the other end of heater passes through pipeline and rectifying column intercommunication, the gas outlet of rectifying column has condensation mechanism through the tube coupling, gaseous gets into the low reaches pipeline after passing through condensation mechanism, the liquid outlet of rectifying column has the intensification mechanism through the tube coupling, the liquid outlet exhaust of the liquid outlet of rectifying column gets into the low reaches pipeline through the pipeline after passing through the intensification mechanism.

The condensing mechanism comprises a condenser and a fifth throttling valve, a gas outlet of the rectifying tower is communicated with an inlet of the condenser through a pipeline, a liquid outlet of the condenser is communicated with the rectifying tower through a pipeline, a gas outlet of the condenser is communicated with a downstream pipeline through a pipeline, and the fifth throttling valve is connected to a pipeline of the gas outlet of the condenser and the downstream pipeline.

The heating mechanism is a reboiler, a liquid outlet of the rectifying tower is communicated with an inlet of the reboiler through a pipeline, a gas outlet of the reboiler is also communicated with the rectifying tower through a pipeline, and a liquid outlet of the reboiler is communicated with a downstream pipeline through a pipeline.

A dynamic simulation system method for natural gas comprising a dynamic simulation system for natural gas as described in any one of the preceding claims, comprising the steps of

The method comprises the following steps: the raw material natural gas is separated by a natural gas separation unit, and a liquid level controller controls the liquid level of the liquid separated in the natural gas separation unit;

step two: on the basis of the step one, the gas separated by the natural gas separation unit enters a natural gas cooling unit for cooling, and the natural gas cooling unit controls the temperature and the pressure of the natural gas cooling unit through a temperature controller and a pressure controller;

step three: on the basis of the second step, the liquid separated in the first step and the liquid in the second step are mixed through a second mixer, then the mixed liquid enters a heavy hydrocarbon separation unit to be separated to obtain gas light hydrocarbon, and the separated liquid enters a downstream pipeline to be treated.

The invention has the beneficial effects that:

compared with the prior art, the natural gas dynamic simulation system has the advantages that the natural gas raw material enters the natural gas separation unit for separation, the separated gas enters the natural gas cooling unit for cooling through the gas outlet of the natural gas separation unit, the liquid separated by the natural gas separation unit enters the second mixer through the pipeline, the liquid in the natural gas cooling unit also enters the second mixer through the pipeline, the liquid is mixed by the second mixer and then enters the heavy hydrocarbon separation unit for separation, then the light hydrocarbon gas is obtained, the separated liquid enters the downstream pipeline for treatment, the liquid level controller controls the liquid level in the natural gas separation unit, the temperature controller and the pressure controller control the temperature and the pressure of the natural gas cooling unit, the recovery and the treatment of the natural gas are further completed, and the dynamic simulation system of the natural gas dynamically operates the recovery and the treatment of the natural gas, and further, the dynamic operation of the actual natural gas recovery processing system is realized, and the labor investment and the cost investment of the dynamic operation of the actual natural gas recovery processing system are saved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of a dynamic simulation system according to the present invention.

In the figure: 1-a first raw material gas input pipeline, 2-a second raw material gas input pipeline, 3-a first throttling valve, 4-a first mixer, 5-a mixed gas input pipeline, 6-a gas-liquid separator, 7-a second throttling valve, 8-a first cooler, 9-a second cooler, 10-a low-temperature separator and 11-a third throttling valve; 12-a second mixer, 13-a fourth throttling valve, 14-a heater, 15-a rectifying tower, 16-a fifth throttling valve, 17-a gas outlet, 18-a liquid outlet, 19-a liquid level controller, 20-a temperature controller and 21-a pressure controller.

Detailed Description