Circulating structure of throttling, heating and separating metering sledge

Abstract

The utility model discloses a circulation structure of throttling, heating, separating and metering sledge, which comprises a heating component and a separating component which are used for gas-liquid separation of wellhead fluid, the heating component is connected with the separating component, a gas outlet of the separating component is connected with a gas outlet pipe, a gas inlet of the heating component is connected with a gas pipeline, and the gas pipeline is connected with a gas inlet of the separating component. And the gas outlet pipe is connected with a circulating pipeline which is connected with a gas pipeline. Natural gas separated by the separation assembly is directly conveyed to the heating assembly through the circulation pipeline, the heating assembly consumes the natural gas for heating, the separation assembly is promoted to separate the natural gas, the separation assembly provides the separated natural gas for the heating assembly, and the natural gas is provided for heating of the heating assembly. External natural gas storage and conveying pipelines are not needed, the transportation cost is not increased correspondingly, and the technical problem that in the prior art, external natural gas storage and conveying pipelines are needed to provide natural gas for combustion heating of the heating furnace, and the transportation cost is increased is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas well exploitation metering skid's technical field, especially point to a throttle heating separation metering skid's circulation structure. BACKGROUND

[0002] The Chinese patent with the application publication number CN102399608A discloses a process and device for preparing solid natural gas synchronously with gas well production, which comprises: high-pressure natural gas from a gas well enters a reactor after pressure reduction, and a layer of hydrate formation promoter solution is coated on the inner wall of the metal reactor in advance; the temperature of the inner wall of the reactor is adjusted to be lower than the dew point of the natural gas but higher than the freezing point; the pressure of the inner wall of the reactor is adjusted to be higher than the formation pressure of hydrate at the temperature; the gas production operation is continuously carried out, and a layer of hydrate is rapidly formed on the inner wall of the reactor; when the hydrate layer gradually thickens, the pigging valve of the reactor inlet is opened, and a pig is put in to sweep the hydrate to a gas charging tank, and the temperature is further reduced to the stable temperature of hydrate under normal pressure, and the hydrate continues to be charged in the tank to a gas content rate close to the theoretical value. The above-mentioned disclosure closely combines the gas well production process, and is reliable in principle, easy to implement, low in cost, high in gas content rate of the prepared natural gas, at least more than 90% of the theoretical value, and can be long-term and stable stored under normal pressure and low temperature. The specification of the above-mentioned disclosure is recorded in paragraph 0045: "After the natural gas from the gas well passes through the inlet cutoff valve, it reaches the heating furnace, the heated natural gas is throttled and pressure-reduced by the throttle valve and then delivered to the two-phase separator, and gas and water are separated respectively. After the natural gas is metered by the orifice plate metering device at the top of the separator, it is delivered to the gas gathering pipeline through the outlet cutoff valve; and the water separated from the natural gas is metered by the flow meter and then input to the external sewage pipeline through the outlet cutoff valve. The normal gas production process is completed".

[0003] However, the device for preparing solid natural gas recorded in the above-mentioned disclosure still needs to be connected with a natural gas storage and delivery pipeline to provide natural gas for the combustion heating of the heating furnace, which increases the transportation cost and is not conducive to reducing the cost in the process of separating and consuming natural gas. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the above-mentioned background technology, the utility model provides a circulation structure of a throttle heating separation metering skid, which solves the technical problem that the prior art needs to be connected with a natural gas storage and delivery pipeline to provide natural gas for the combustion heating of the heating furnace, and increases the transportation cost.

[0005] The utility model discloses a technical scheme is as follows: a kind of throttling heating separation metering skid's circulation structure, including the heating assembly and separation component for wellhead fluid gas-liquid separation, the heating assembly and separation component are connected, the gas outlet of separation component is connected with gas outlet pipe, the gas inlet of heating assembly is connected with gas pipeline, the circulation pipeline is connected on the gas outlet pipe, and the circulation pipeline is connected with gas pipeline.

[0006] Preferably, the circulation pipeline includes a circulation pipeline, and the two ends of the circulation pipeline are connected with the gas outlet pipe and the gas pipeline respectively.

[0007] Preferably, the circulation pipeline is provided with a gas purifier.

[0008] Preferably, the gas pipeline is provided with a one-way valve, and the gas pipeline is connected with the circulation pipeline through a flange.

[0009] Preferably, the heating assembly includes a heating furnace, the gas pipeline of the heating furnace is connected with the circulation pipeline, and the circulation pipeline is connected with the gas outlet pipe.

[0010] Preferably, the heating furnace is a water jacket type heating furnace.

[0011] Preferably, the separation component includes a gas-liquid two-phase separator, the liquid outlet of the gas-liquid two-phase separator is connected with a liquid discharge pipeline, and the gas outlet pipe of the gas-liquid two-phase separator is connected with the gas pipeline of the heating furnace through the circulation pipeline.

[0012] Preferably, a demister is arranged at the gas outlet of the gas-liquid two-phase separator.

[0013] Preferably, the demister is a wire mesh demister.

[0014] Preferably, the medium inlet of the heating furnace is provided with a connecting pipe, and the connecting pipe and the gas outlet pipe are respectively provided with a second valve and a third valve.

[0015] The utility model discloses a beneficial effect: the utility model discloses the gas outlet pipe of separation component's gas outlet is connected, and the gas inlet of heating assembly is connected with gas pipeline, the circulation pipeline is connected on the gas outlet pipe, and the circulation pipeline is connected with gas pipeline, and the natural gas separated by separation component is directly delivered to heating assembly through circulation pipeline, realizes that heating assembly consumes natural gas and heats, promotes separation component and separates natural gas, and separation component provides natural gas after separation to heating assembly, provides natural gas for the heating of heating assembly, forms a separation and consumption cycle, does not need external natural gas storage and delivery pipeline, and correspondingly also does not increase transportation cost, solves the technical problem of increasing transportation cost in the prior art, and natural gas storage and delivery pipeline are connected to provide natural gas for the combustion heating of heating furnace. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0017] Figure 1 The connection top view of the heating furnace and the gas-liquid two-phase separator of the present application.

[0018] Figure 2 The connection schematic diagram of the gas-liquid two-phase separator, the circulating pipeline and the gas purifier of the present application.

[0019] In the figure, 1 is a heating furnace, 2 is a gas-liquid two-phase separator, 3 is a circulating pipeline, 4 is a liquid discharge pipeline, 5 is a demister, 6 is an air outlet pipe, 7 is a circulating pipeline, 8 is a first valve, 9 is a gas pipeline, 10 is a check valve, 11 is a gas purifier, 12 is a connecting pipe, 13 is a second valve, 14 is a third valve, and 15 is a flow meter. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] Embodiment 1, a throttling heating separation metering skid circulating structure, as shown in Figure 1 and Figure 2 , comprises a heating assembly and a separation assembly for gas-liquid separation of wellhead fluid, the heating assembly and the separation assembly are connected, an air outlet pipe 6 is connected to the air outlet of the separation assembly, a gas pipeline 9 is connected to the gas inlet of the heating assembly, a circulating pipeline 3 is connected to the air outlet pipe 6, and the circulating pipeline 3 is connected to the gas pipeline 9. The natural gas separated by the separation assembly is directly delivered to the heating assembly through the circulating pipeline 3, so that the heating assembly consumes natural gas for heating, the separation assembly separates natural gas, the separation assembly provides the separated natural gas to the heating assembly, the heating assembly is provided with natural gas for heating, a separation and consumption cycle is formed, external natural gas storage and delivery pipelines are not needed, and the corresponding transportation cost is not increased. The technical problem that the prior art needs to provide natural gas for the combustion heating of the heating furnace through external natural gas storage and delivery pipelines and increases transportation cost is solved.

[0022] Example 2, on the basis of example 1, a throttling heating separation metering skid circulation structure, as shown in Figure 1 and Figure 2 The circulation pipeline 3 includes a circulation pipeline 7, both ends of the circulation pipeline 7 are connected with the gas outlet pipe 6 and the gas pipeline 9 respectively, and the circulation pipeline 7 is provided with a first valve 8 and a flow meter 15. The first valve 8 is arranged on the circulation pipeline 7 to control the opening and closing of the circulation pipeline 7, thereby controlling whether the natural gas enters the gas pipeline 9 along the circulation pipeline 7; the flow meter 15 is arranged to measure the flow of the natural gas entering the gas pipeline 9 along the circulation pipeline 7.

[0023] Example 3, on the basis of example 2, a throttling heating separation metering skid circulation structure, as shown in Figure 2 The gas purifier 11 is arranged on the circulation pipeline 7. The gas purifier 11 is arranged to further filter and purify the natural gas entering the circulation pipeline 7, so as to avoid the impurities in the natural gas separated by the separation assembly from entering the heating assembly, thereby greatly ensuring the normal operation of the gas equipment in the heating assembly.

[0024] Example 4, on the basis of example 3, a throttling heating separation metering skid circulation structure, as shown in Figure 1 and Figure 2 The one-way valve 10 is arranged on the gas pipeline 9, and the gas pipeline 9 is connected with the circulation pipeline 7 through a flange. The one-way valve 10 is arranged to ensure the flow direction of the natural gas, thereby avoiding the backflow and reverse flow of the natural gas; the gas pipeline 9 is connected with the circulation pipeline 7 through the flange, so that the gas pipeline 9 and the circulation pipeline 7 can be conveniently disassembled and replaced.

[0025] Example 5, on the basis of any one of examples 2-4, a throttling heating separation metering skid circulation structure, as shown in Figure 1 and Figure 2 The heating assembly includes a heating furnace 1, the gas pipeline 9 of the heating furnace 1 is connected with the circulation pipeline 7, and the circulation pipeline 7 is connected with the gas outlet pipe 6. The heating furnace 1 is provided with temperature, pressure, water level and flame signal detection instruments, the heating furnace 1 generates heat by burning fuel, the heat is transmitted to the water in the water jacket through a fire barrel, a smoke pipe and the like, so that the temperature of the water is increased, the hot water transmits the heat to the gas-liquid mixture through a coil, thereby increasing the temperature of the gas-liquid mixture and preventing the hydrate from being formed in the throttling and pressure reduction process of the gas-liquid mixture.

[0026] Example 6, on the basis of example 5, a throttling heating separation metering skid circulation structure, as shown in Figure 1As shown, the heating furnace 1 is a water-jacketed heating furnace. It primarily consists of a water jacket, a flame tube, a smoke pipe, a chimney, a coil, a combustion control system, a manhole, an expansion tank, a water inlet, and an instrumentation system. The water-jacketed heating furnace uses a heated flame tube to heat the intermediate medium (water), which then heats the natural gas in the coil tube, thereby avoiding scaling, corrosion, and coking caused by direct heating. The water-jacketed heating furnace utilizes a horizontal, two-pass internal combustion structure, significantly increasing the heat exchange area. A reciprocating compressor is used to boost the fuel gas supply to increase the flow rate of the heat transfer medium. Thermally conductive silicone grease is used as the material for the flame tube and coil tube to ensure good heat conduction. Water in the water-jacketed heating furnace evaporates easily during operation, requiring timely water replenishment. Compared to tubular and flame tube-type heating furnaces, water-jacketed heating furnaces have higher heat transfer efficiency.

[0027] Example 7, based on Example 4 or 6, a circulation structure of a throttling heating separation metering skid, such as Figure 1 and Figure 2 As shown, the separation assembly includes a gas-liquid two-phase separator 2, the liquid outlet of which is connected to a liquid discharge line 4. The gas outlet pipe 6 of the gas-liquid two-phase separator 2 is connected to the gas pipeline 9 of the heating furnace 1 via a circulation pipeline 7. The gas-liquid two-phase separator 2 utilizes the differences in physical properties (such as density, viscosity, surface tension, etc.) between the liquid and gaseous components in natural gas to separate the liquid phase (water and oil) from the gas phase, thereby achieving a certain purity of the gas. The gas-liquid mixed fluid enters the gas-liquid two-phase separator 2 along the tangential direction of the cylinder, and an elbow is provided at the inlet so that the airflow flows in the opposite direction after entering the separator cylinder; a fixed spoiler baffle is provided below the elbow, and the mixed airflow collides with the baffle and then flows back toward the outlet, so that the gas-liquid mixed fluid entering the separator is decelerated by the collision mechanism, thereby realizing the primary separation of the gas-liquid mixture; then the gas-liquid mixed fluid undergoes secondary separation in the gravity sedimentation section, and the airflow flows horizontally, forming a 90° angle with the movement direction of the droplets. A gas outlet is provided at the top of the liquid two-phase separator 2 cylinder, and a liquid outlet and a sewage outlet are provided at the bottom of the separator cylinder; the emergency liquid level, low liquid level, normal liquid level and high liquid level are set in the two-phase separator from low to high, and a liquid level sensor is provided at each liquid level. The fluid is introduced into the separator through the top of the cylinder. When the liquid level sensor senses that the liquid level in the separator has reached the normal level, the main drainage passage is kept unobstructed. When the liquid level sensor senses that the liquid level has reached the high level, the auxiliary drainage passage is kept unobstructed to increase the drainage throughput. When the liquid level drops to the low level, the auxiliary drainage passage is closed. When the liquid level drops to the emergency level, the main drainage passage is closed.

[0028] Example 8, based on Example 7, a circulation structure of a throttling heating separation metering skid, such asFigure 2 As shown in the figure, the gas-liquid two-phase separator 2 is provided with a demister 5 at the gas outlet. The main function of the demister 5 is to ensure the effect of gas-liquid separation and further remove impurities in the gas stream, so as to achieve the purpose of purification and purity.

[0029] Example 9, on the basis of example 8, a throttling heating separation metering skid circulation structure, as shown in Figure 2 As shown in the figure, the demister 5 is a wire mesh demister. The demister 5 is provided to avoid the gas entraining liquid droplets from being discharged. The reason for choosing the wire mesh demister is that the wire mesh demister is composed of metal mesh packing, arch plate and blade. The metal mesh packing is cylindrical and is wound by stainless steel wire mesh. Liquid droplets impact the metal mesh and coalesce to sink downward, thereby eliminating the gas entraining liquid droplets from being discharged.

[0030] Example 10, on the basis of example 9, a throttling heating separation metering skid circulation structure, as shown in Figure 1 As shown in the figure, the medium inlet of the heating furnace 1 is provided with a connecting pipe 12, and the connecting pipe 12 and the gas outlet pipe 6 are respectively provided with a second valve 13 and a third valve 14. The connecting pipe 12 is provided to facilitate the gas-liquid mixture into the heating furnace 1; the second valve 13 is provided to facilitate the control of the start and stop of the connecting pipe 12, thereby controlling the amount of gas-liquid mixture entering the heating furnace 1; and the third valve 14 is provided to facilitate the control of the start and stop of the gas outlet pipe 6, thereby controlling whether the natural gas flows out along the gas outlet pipe 6.

[0031] When example 10 is implemented, the gas-liquid mixture enters the heating furnace 1 along the first inlet through the connecting pipe 12, and then the gas-liquid mixture reaches the coil pipe in the heating furnace 1. The heating furnace 1 heats the gas-liquid mixture in the coil pipe. After heating, the gas-liquid mixture enters the gas-liquid two-phase separator 2, and then the gas-liquid two-phase separator 2 separates the gas-liquid mixture. After separation, the natural gas gas flows out through the demister 5 along the gas outlet pipe 6, and the separated liquid flows out along the liquid outlet pipeline 4. The gas outlet pipe 6 is connected with the external natural gas storage tank, and the gas outlet pipe 6 and the gas pipeline 9 of the heating furnace 1 are connected through the circulation pipeline 7, thereby making the separated natural gas enter the gas pipeline 9 of the heating furnace 1 to provide gas for the combustion of the heating furnace 1.

[0032] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A circulation structure of a throttling heating separation metering skid, comprising a heating component and a separation component, wherein the heating component and the separation component are connected, characterized in that: The gas outlet of the separation component is connected to an outlet pipe (6), the gas inlet of the heating component is connected to a gas pipeline (9), the gas outlet pipe (6) is connected to a circulation pipeline (3), and the circulation pipeline (3) is connected to the gas pipeline (9).

2. The circulation structure of the throttling heating separation metering skid according to claim 1 is characterized in that: The circulation pipeline (3) comprises a circulation pipeline (7), the two ends of which are respectively connected to the gas outlet pipe (6) and the gas pipeline (9), and the circulation pipeline (7) is provided with a first valve (8) and a flow meter (15).

3. The circulation structure of the throttling heating separation metering skid according to claim 2 is characterized in that: A gas purifier (11) is provided on the circulation pipeline (7).

4. The circulation structure of the throttling heating separation metering skid according to claim 3 is characterized in that: A one-way valve (10) is provided on the gas pipeline (9), and the gas pipeline (9) is connected to the circulation pipeline (7) via a flange.

5. The circulation structure of the throttling heating separation metering skid according to any one of claims 2 to 4, characterized in that: The heating assembly comprises a heating furnace (1), a gas pipeline (9) of the heating furnace (1) is connected to a circulation pipeline (7), and the circulation pipeline (7) is connected to the gas outlet pipe (6).

6. The circulation structure of the throttling heating separation metering skid according to claim 5 is characterized in that: The heating furnace (1) is a water-jacketed heating furnace.

7. The circulation structure of the throttling heating separation metering skid according to claim 4 or 6, characterized in that: The separation component comprises a gas-liquid two-phase separator (2), the liquid outlet of the gas-liquid two-phase separator (2) is connected to a liquid discharge pipeline (4), and the gas outlet pipe (6) of the gas-liquid two-phase separator (2) is connected to the gas pipeline (9) of the heating furnace (1) via a circulation pipeline (7).

8. The circulation structure of the throttling heating separation metering skid according to claim 7 is characterized in that: A demister (5) is provided at the gas outlet of the gas-liquid two-phase separator (2).

9. The circulation structure of the throttling heating separation metering skid according to claim 8 is characterized in that: The demister (5) is a wire mesh demister.

10. The circulation structure of the throttling heating separation metering skid according to claim 9 is characterized in that: The medium inlet of the heating furnace (1) is provided with a connecting pipe (12), and the connecting pipe (12) and the gas outlet pipe (6) are respectively provided with a second valve (13) and a third valve (14).

Images