Throttling, heating, separating and metering skid device

Abstract

The utility model discloses a throttling, heating, separating and metering sledge device which comprises a bottom sledge, a heating furnace is arranged on the bottom sledge, an outlet of the heating furnace is connected with a two-stage throttling assembly, the two-stage throttling assembly is connected with a gas-liquid two-phase separator, a gas outlet of the gas-liquid two-phase separator is connected with a gas outlet pipe, the gas outlet pipe is connected with a circulating pipeline, and the circulating pipeline is connected with a gas inlet of the gas-liquid two-phase separator. And a gas pipeline of the heating furnace is connected with the circulating pipeline. The natural gas separated by the gas-liquid two-phase separator is directly conveyed to the heating furnace through the circulating pipeline, so that the heating furnace consumes the natural gas for heating, the gas-liquid two-phase separator is promoted to separate the natural gas, the gas-liquid two-phase separator provides the separated natural gas for the heating furnace, and the natural gas is provided for heating of the heating furnace. A separation and consumption cycle is formed, an external natural gas storage and conveying pipeline is not needed, and the technical problem that in the prior art, an external natural gas storage and conveying pipeline is needed to provide natural gas for combustion heating of a 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 to refer to a throttle heating separation metering skid device. 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 operation, 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 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, a pigging valve at the inlet of the reactor is opened, a pig is put in, and the hydrate is swept to a gas charging tank, and further cooling is carried out to the stable temperature of hydrate under normal pressure, and the hydrate continues to be charged with gas 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 has reliable principle, is easy to implement, and has low cost. The natural gas hydrate prepared has high gas content rate, which is at least 90% or more of the theoretical value, and can be stably stored under normal pressure and low temperature for a long time. 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 is sent to a heating furnace, and the heated natural gas is sent to a two-phase separator after pressure reduction by a throttle valve. Gas and water are separated respectively. After the natural gas is metered by a orifice plate metering device at the top of the separator, it is sent to a gas gathering pipeline through an outlet cutoff valve. The water separated from the natural gas is metered by a flow meter, and then is input to an external sewage pipeline through an 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 transportation 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 art, the utility model provides a throttle heating separation metering skid device, which solves the technical problem of the need for external natural gas storage and transportation pipeline to provide natural gas for the combustion heating of the heating furnace in the prior art, and increases the transportation cost.

[0005] The utility model discloses a technical scheme is as follows: a throttle heating separation metering skid device, including bottom skid, be equipped with heating furnace on the bottom skid, and the export of heating furnace is connected with two stage throttle component, and two stage throttle component is connected with gas-liquid two phase separator, the liquid outlet of gas-liquid two phase separator is connected with drainage pipeline, and the gas outlet of gas-liquid two phase separator is connected with gas outlet pipe, and the circulation pipeline is connected on the gas outlet pipe, and the gas pipeline of heating furnace is connected with circulation pipeline.

[0006] Preferably, the circulation pipeline comprises a circulation pipe, both ends of the circulation pipe are connected with the gas outlet pipe and the gas pipeline respectively, and the circulation pipe is provided with a first valve and a flowmeter.

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

[0008] Preferably, the heating furnace is provided with a first inlet, a first outlet, a second inlet and a second outlet, the first inlet 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.

[0009] Preferably, the two stage throttle component comprises a first throttle valve and a second throttle valve, the first outlet is connected with the second inlet through the first throttle valve, the second outlet is connected with the second throttle valve, and the second throttle valve is connected with the inlet of the gas-liquid two phase separator.

[0010] Preferably, the gas pipeline is provided with a check valve, and the gas pipeline is connected with the circulation pipe through a flange.

[0011] Preferably, the heating furnace is a water jacket type heating furnace.

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

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

[0014] Preferably, the bottom skid is provided with a fixing frame for hoisting.

[0015] The utility model discloses a beneficial effect: the utility model discloses the gas -liquid two -phase separator's gas outlet is connected with the outlet pipe, the outlet pipe is connected with the circulating pipeline, and the heating furnace's gas pipeline is connected with circulating pipeline, and the gas -liquid two -phase separator separates out the natural gas directly to heating furnace through circulating pipeline, realizes heating furnace consumption natural gas heating, promotes the gas -liquid two -phase separator separation natural gas, and the gas -liquid two -phase separator provides heating furnace with the natural gas after separation, provides natural gas for the heating of heating furnace, forms a separation and consumption cycle, does not need to connect natural gas storage and delivery pipeline, and corresponding also does not increase transportation cost, solves the prior art and needs to connect natural gas storage and delivery pipeline for the combustion heating of heating furnace to provide natural gas, and increases the technical problem of transportation cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model, the following will be needed to use the drawings in the embodiment description briefly introduced, obviously, the following description in the drawings is only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, other drawings can also be obtained according to these drawings.

[0017] Figure 1 It is the connection overhead view of heating furnace and gas -liquid two -phase separator of the utility model.

[0018] Figure 2 It is the connection schematic view of gas -liquid two -phase separator, circulating pipeline and gas purifier of the utility model.

[0019] In the drawing, 1 heating furnace, 2 gas -liquid two -phase separator, 3 circulating pipeline, 4 liquid discharge pipeline, 5 demister, 6 outlet pipe, 7 circulating pipeline, 8 first valve, 9 gas pipeline, 10 check valve, 11 gas purifier, 12 connecting pipe, 13 second valve, 14 third valve, 15 flowmeter, 16 bottom skid, 17 primary throttle valve, 18 secondary throttle valve. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without paying creative labor belong to the protection scope of the utility model.

[0021] Embodiment 1, a throttling heating separation metering skid device, such as Figure 1 And Figure 2As shown, including the bottom skid 16, which is provided with heating furnace 1, heating furnace 1 is connected with two stage throttle assembly, two stage throttle assembly is connected with gas-liquid two phase separator 2, the outlet of gas-liquid two phase separator 2 is connected with drain line 4, the gas outlet of gas-liquid two phase separator 2 is connected with gas outlet pipe 6, the gas outlet pipe 6 is connected with circulation line 3, the gas pipeline 9 of heating furnace 1 is connected with the circulation line 3. The gas outlet of gas-liquid two phase separator 2 is connected with gas outlet pipe 6, the gas outlet pipe 6 is connected with circulation line 3, the gas pipeline of heating furnace 2 is connected with the circulation line 3, the natural gas separated by the gas-liquid two phase separator 2 is directly sent to the heating furnace 1 through the circulation line 3, which realizes the consumption of natural gas for heating furnace 1, promotes the separation of natural gas in gas-liquid two phase separator 2, and provides natural gas for heating furnace 1 after separation, which provides natural gas for heating furnace 1, forms a separation and consumption cycle, and does not need external natural gas storage and transportation pipeline, which corresponds to no increase in transportation cost, solves the technical problems of the prior art, such as the need for external natural gas storage and transportation pipeline to provide natural gas for the combustion heating of heating furnace, and the increase in transportation cost.

[0022] Wherein the gas-liquid two phase separator 2 utilizes the physical property differences (such as density, viscosity, surface tension, etc.) between the liquid components and the gaseous components in the natural gas to separate the liquid phase (water and oil) in the natural gas from the gas phase, so that the gas reaches a certain purity. The gas-liquid mixed fluid enters along the tangent direction of the gas-liquid two phase separator 2 cylinder, a bend is arranged at the inlet, so that the gas flow flows in the opposite direction after entering the separator cylinder; a fixed turbulence baffle is arranged below the bend, the mixed gas flow collides with the baffle and then returns to the outlet direction, so as to realize the primary separation of the gas-liquid mixed fluid entering the separator by the collision mechanism; then the gas-liquid mixed fluid is subjected to secondary separation in the gravity settling section, the gas flow flows horizontally, and the angle between the motion direction of the liquid drops and the horizontal direction is 90°. A gas outlet is arranged at the top of the gas-liquid two phase separator 2 cylinder, and a liquid outlet and a blowdown outlet are arranged at the bottom of the separator cylinder; the two phase separator is sequentially provided with an emergency liquid level, a low liquid level, a normal liquid level and a high liquid level from low to high, and a liquid level sensor is arranged at each liquid level. The fluid is introduced into the separator cylinder through the top of the separator cylinder, when the liquid level in the separator reaches the normal liquid level through the liquid level sensor, the main liquid discharge passage is kept unobstructed; when the liquid level reaches the high liquid level through the liquid level sensor, the auxiliary liquid discharge passage is kept unobstructed, and the liquid discharge flux is increased; when the liquid level drops to the low liquid level, the auxiliary liquid discharge passage is closed. When the liquid level drops to the emergency liquid level, the main liquid discharge passage is closed.

[0023] Example 2, on the basis of example 1, a throttling heating separation metering skid device, as Figure 2As shown, the circulation pipeline 3 includes a circulation pipeline 7, two ends of the circulation pipeline 7 are connected with the gas outlet pipe 6 and the gas pipeline 9 respectively, 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.

[0024] Embodiment 3, on the basis of embodiment 2, a throttling heating separation metering skid device, as shown in Figure 2 As shown, the circulation pipeline 7 is provided with a gas purifier 11. 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 affecting the normal operation of the gas equipment in the heating assembly, and greatly ensuring the normal operation of the gas equipment in the heating assembly.

[0025] Embodiment 4, on the basis of embodiment 3, a throttling heating separation metering skid device, as shown in Figure 1 and Figure 2 As shown, the heating furnace 1 is provided with a first inlet, a first outlet, a second inlet and a second outlet, the first inlet is provided with a connecting pipe 12, the connecting pipe 12 and the gas outlet pipe 6 are respectively provided with a second valve 13 and a third valve 14. The gas-liquid mixture enters the heating furnace 1 along the first inlet, then the gas-liquid mixture reaches the coil pipe in the heating furnace 1, the heating furnace 1 first heats the gas-liquid mixture in the coil pipe, the gas-liquid mixture after the first heating flows out along the first outlet and enters the coil pipe in the heating furnace 1 again along the second inlet, the heating furnace 1 second heats the gas-liquid mixture in the coil pipe, then the gas-liquid mixture after the second heating enters the gas-liquid two-phase separator 2 along the second outlet.

[0026] Embodiment 5, on the basis of embodiment 4, a throttling heating separation metering skid device, as shown in Figure 1As shown, the two-stage throttling assembly includes a first-stage throttle valve 17 and a second-stage throttle valve 18, the first outlet is connected with the second inlet through the first-stage throttle valve 17, the second outlet is connected with the second-stage throttle valve 18, and the second-stage throttle valve 18 is connected with the inlet of the gas-liquid two-phase separator 2. After the first heating, the gas-liquid mixture flows out along the first outlet, throttles and depressurizes through the first-stage throttle valve 17, and then enters the coil in the heating furnace 1 again through the second inlet. The heating furnace 1 heats the gas-liquid mixture in the coil for the second time, and then the gas-liquid mixture after the second heating flows out along the second outlet, throttles and depressurizes through the second-stage throttle valve 18, and then enters the gas-liquid two-phase separator 2. After throttling and depressurizing by the first-stage throttle valve 17 and the second-stage throttle valve 18, the pressure of the gas-liquid mixture entering the gas-liquid two-phase separator 2 is greatly reduced, and the separation effect of the gas-liquid mixture in the gas-liquid two-phase separator 2 is greatly improved.

[0027] In the embodiment 6, on the basis of any one of the embodiments 2-5, a throttling heating separation metering skid device is provided, as shown in Figure 1 and Figure 2 As shown, the gas pipeline 9 is provided with a one-way valve 10, 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 and avoid the return and reverse flow of the natural gas. The gas pipeline 9 is connected with the circulation pipeline 7 through a flange, so that the gas pipeline 9 and the circulation pipeline 7 can be conveniently disassembled and replaced.

[0028] In the embodiment 6, on the basis of any one of the embodiments 2-5, a throttling heating separation metering skid device is provided, as shown in Figure 1 As shown, the heating furnace 1 is a water jacket type heating furnace. The water jacket type heating furnace mainly includes a water jacket, a fire barrel, a smoke pipe, a chimney, a coil, a combustion control system, a manhole, an expansion water tank, a water supplement opening, and an instrument system. The water jacket type heating furnace uses a heated fire barrel to heat the intermediate medium (water), and the hot water heats the natural gas in the coil, thereby avoiding the scaling, corrosion, and coking caused by direct heating. The water jacket type heating furnace adopts a horizontal internal combustion two-return combustion structure, which greatly increases the heat exchange area. A reciprocating compressor is used to pressurize the fuel gas to improve the flow rate of the heat transfer medium. Heat-conductive silicone grease is used as the material of the fire barrel and the coil to ensure good heat conduction effect. The water jacket type heating furnace evaporates water during operation, so it needs to be supplemented in time. Compared with the pipe type and fire barrel type heating furnaces, the water jacket type heating furnace has higher heat transfer efficiency.

[0029] In the embodiment 6, on the basis of any one of the embodiments 2-5, a throttling heating separation metering skid device is provided, as shown in Figure 2As shown, 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.

[0030] In the embodiment 8, on the basis of the embodiment 8, a throttling heating separation metering skid device is provided. Figure 2 As shown, the demister 5 is a wire mesh demister. The demister 5 is arranged to avoid the gas from carrying liquid droplets out. The wire mesh demister is selected because it is composed of metal mesh fillers, arch plates and blades. The metal mesh fillers are cylindrical and are made of stainless steel wire mesh. Liquid droplets impact the metal mesh and coalesce to sink downward, so as to eliminate the gas from carrying liquid droplets out.

[0031] In the embodiment 1 or 9, on the basis of the embodiment 1 or 9, a throttling heating separation metering skid device is provided. Figure 1 As shown, the bottom skid 16 is provided with a fixing frame for hoisting. The fixing frame is directly welded with the bottom skid 16. The arrangement of the fixing frame greatly improves the hoisting work of the throttling heating separation metering skid device. When the throttling heating separation metering skid device is hoisted, the hook is directly hung with the fixing frame.

[0032] In the embodiment 10, the gas-liquid mixture enters the heating furnace 1 through the connecting pipe 12 along the first inlet, and then the gas-liquid mixture reaches the coil pipe in the heating furnace 1. The heating furnace 1 first heats the gas-liquid mixture in the coil pipe. After the first heating, the gas-liquid mixture flows out along the first outlet and is throttled and decompressed by the primary throttling valve 17, and then enters the coil pipe in the heating furnace 1 again through the second inlet. The heating furnace 1 second heats the gas-liquid mixture in the coil pipe. After the second heating, the gas-liquid mixture flows out along the second outlet and is throttled and decompressed by the secondary throttling valve 18, and then enters the gas-liquid two-phase separator 2. The gas-liquid two-phase separator 2 separates the gas-liquid mixture. The separated natural gas flows out along the outlet pipe 6 through the demister 5. The separated liquid flows out along the liquid discharge pipeline 4. The outlet pipe 6 is connected with the external natural gas storage tank, and the outlet pipe 6 is connected with the gas pipeline 9 of the heating furnace 1 through the circulating pipeline 7, so that the separated natural gas enters the gas pipeline 9 of the heating furnace 1, and provides fuel gas for the combustion of the heating furnace 1.

[0033] 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 throttling, heated, separation, metering skid apparatus comprising a base skid (16) characterized by, The bottom skid (16) is provided with a heating furnace (1), the outlet of the heating furnace (1) is connected with a two-stage throttling assembly, the two-stage throttling assembly is connected with a gas-liquid two-phase separator (2), the liquid outlet of the gas-liquid two-phase separator (2) is connected with a liquid discharge pipeline (4), the gas outlet of the gas-liquid two-phase separator (2) is connected with a gas outlet pipe (6), the gas outlet pipe (6) is connected with a circulation pipeline (3), and the gas pipeline (9) of the heating furnace (1) is connected with the circulation pipeline (3).

2. The throttling, heated, skid-mounted separation metering device of claim 1, wherein, The circulation pipeline (3) comprises 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 flowmeter (15).

3. The throttling, heated, skid-mounted separation metering device of claim 2, wherein, The circulation pipeline (7) is provided with a gas purifier (11).

4. The throttling, heated, skid-mounted separation metering device of claim 3, wherein, The heating furnace (1) is provided with a first inlet, a first outlet, a second inlet and a second outlet, the first inlet 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).

5. The throttling, heated, skid-mounted separation metering device of claim 4, wherein, The two-stage throttling assembly comprises a primary throttle valve (17) and a secondary throttle valve (18), the first outlet is connected with the second inlet through the primary throttle valve (17), the second outlet is connected with the secondary throttle valve (18), and the secondary throttle valve (18) is connected with the inlet of the gas-liquid two-phase separator (2).

6. The throttling, heated, skid-mounted separation metering device of any one of claims 2-5, wherein, The gas pipeline (9) is provided with a one-way valve (10), and the gas pipeline (9) is connected with the circulation pipeline (7) through a flange plate.

7. The throttling, heated, skid-mounted separation metering device of claim 6, wherein, The heating furnace (1) is a water jacket type heating furnace.

8. The throttling, heated, skid-mounted separation metering device of claim 7, wherein, The gas outlet of the gas-liquid two-phase separator (2) is provided with a demister (5).

9. The throttling, heated, skid-mounted separation metering device of claim 8, wherein, The demister (5) is a wire mesh demister.

10. The throttling, heated, skid-mounted separation metering device of claim 1 or 9, wherein, The bottom skid (16) is provided with a fixing frame for hoisting.

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