Gas-liquid separation device used at front end of compressor unit

Abstract

The utility model belongs to the technical field of separation equipment, and particularly relates to a gas-liquid separation device used at the front end of a compressor unit, which comprises a horizontal tank body and a separation cavity, the top of the horizontal tank body is externally connected with a gas inlet pipe and a gas outlet pipe respectively, the separation cavity is arranged inside the horizontal tank body, and the gas inlet pipe is communicated with the gas outlet pipe. The output end of the gas inlet pipe penetrates through the horizontal tank body to be communicated with the separation cavity, external gas is guided into the separation cavity through the gas inlet pipe, the input end of the exhaust pipe penetrates through the horizontal tank body to be communicated with the separation cavity, gas in the separation cavity is exhausted through the exhaust pipe, and a separation mechanism is arranged in the separation cavity; according to the purpose of the gas purification device, through the arrangement of the screening gas channel, gas which is blocked by the shielding part and baffled away passes through the screening gas channel in the process of flowing to the exhaust pipe, and the gas is filtered through the adsorption layer in the screening gas channel, so that dust impurities in the gas are removed, and the overall purity of natural gas entering a compressor unit is improved; and certain protection is provided for the compressor unit.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of separation equipment, and specifically relates to a gas-liquid separation device for the front end of a compressor unit. BACKGROUND

[0002] A gas-liquid separator is a device for separating gas and liquid. Because the specific gravities of gas and liquid are different, when liquid and gas flow together, if a blockage is encountered, the gas will flow in a different direction, while the liquid, due to inertia, continues to have a forward velocity, and the forward liquid adheres to the blocking wall surface and is collected downward due to the action of gravity and is discharged through a discharge pipe.

[0003] In the prior art, in the process of natural gas well production, it is necessary to ensure that the natural gas entering the compressor does not contain liquid, so it is necessary to use a gas-liquid separator to separate the liquid-containing natural gas before the natural gas is introduced into the compressor unit. However, when the gas-liquid separator separates gas and liquid, the separated gas is mostly directly discharged through the exhaust pipe, which causes the dust and other impurities contained in the gas to easily enter the compressor through the exhaust pipe, causing a safety hazard. SUMMARY

[0004] Therefore, the utility model provides a gas-liquid separation device for the front end of a compressor unit, which aims to filter the natural gas before the natural gas is discharged through the exhaust pipe, which helps to reduce or remove the residual impurities in the natural gas and protect the compressor unit.

[0005] The utility model adopts the technical scheme as follows:

[0006] A gas-liquid separation device for the front end of a compressor unit, comprising a horizontal tank body and a separation cavity, the top of the horizontal tank body is respectively externally connected with an air inlet pipe and an exhaust pipe, the separation cavity is arranged inside the horizontal tank body, the output end of the air inlet pipe communicates with the separation cavity through the horizontal tank body, external gas is introduced into the separation cavity through the air inlet pipe, the input end of the exhaust pipe communicates with the separation cavity through the horizontal tank body, the gas in the separation cavity is discharged through the exhaust pipe, and a separation mechanism is arranged in the separation cavity.

[0007] A shielding part is arranged on the inner wall of the separation cavity and located between the output end of the air inlet pipe and the input end of the exhaust pipe.

[0008] A screening hopper is connected with the input end of the exhaust pipe.

[0009] The inside of the screening hopper is provided with a screening air channel, the input end of the screening air channel faces the shielding part, the output end of the screening air channel is connected with the input end of the exhaust pipe, and an adsorption layer is arranged on the inner wall of the screening air channel.

[0010] As a preferred technical solution, the shielding part comprises:

[0011] An upper baffle, a top of the upper baffle being fixed on an inner wall of a top of the separation cavity, and a gap being left between a bottom of the upper baffle and a bottom of the separation cavity;

[0012] A lower baffle, a bottom of the lower baffle being fixed on an inner wall of a bottom of the separation cavity, and a gap being left between a top of the lower baffle and a top of the separation cavity;

[0013] Wherein, the upper baffle and the lower baffle are axially spaced and staggered in the separation cavity.

[0014] Further, surfaces of the upper baffle and the lower baffle are provided with flow channels for liquid flow.

[0015] Further, the utility model further comprises:

[0016] A liquid accumulation bin, the liquid accumulation bin being arranged in the interior of the horizontal tank body and being arranged at the bottom of the separation cavity;

[0017] A blowdown pipe, the blowdown pipe being arranged at the bottom of the horizontal tank body and being communicated with the liquid accumulation bin;

[0018] Wherein, an opening for communicating with the liquid accumulation bin is arranged on the inner wall of the bottom of the separation cavity.

[0019] Further, the inner walls on both sides of the liquid accumulation bin are arranged in an inclined manner.

[0020] Further, the utility model further comprises:

[0021] A spiral coil, the spiral coil being arranged in the separation cavity, an input end of the spiral coil being connected with an output end of the air inlet pipe, and an output end of the spiral coil being directed to the shielding part; wherein, a primary sieve hole is arranged on a bottom of a side of the spiral coil close to the output end.

[0022] Further, the sieve gas channel is arranged in an "S" shape.

[0023] Further, a gas guide pipe is arranged on the output end of the sieve gas channel, wherein, a Venturi structure is arranged in the gas guide pipe.

[0024] As described above, due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0025] The gas blocked by the shielding part and deflected away will pass through the screening air passage during flowing to the exhaust pipe, and the gas will be filtered by the adsorption layer in the screening air passage, so that the dust impurities in the gas are removed, the overall purity of the natural gas entering the compressor set is improved, and the compressor set is protected. BRIEF DESCRIPTION OF DRAWINGS

[0026] The utility model will pass through example and refer to the mode of drawing, wherein:

[0027] Fig. 1 It is the top view of the gas-liquid separation device for the front end of the compressor set provided by the utility model;

[0028] Fig. 2 It is the internal structure schematic view of the horizontal tank body provided by the utility model;

[0029] Fig. 3 It is the internal structure schematic view of the screening box provided by the utility model.

[0030] Horizontal tank body-1, air inlet pipe-2, exhaust pipe-3, blowdown pipe-4, spiral coil-5, primary screen hole-6, upper baffle-7, lower baffle-8, liquid accumulation bin-9, screening hopper-10, air guide pipe-11, screening air passage-12, adsorption layer-13. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0032] In the prior art, in the production process of the natural gas well, it is crucial to ensure that the natural gas entering the compressor does not contain liquid. Therefore, before being introduced into the compressor set, the liquid-containing natural gas must be treated using a gas-liquid separator. However, in the process of performing gas-liquid separation, the separated gas is often directly discharged through the exhaust pipe, which makes the dust and other impurities carried in the gas possibly enter the compressor through the exhaust pipe, thereby causing a safety risk.

[0033] Embodiment one

[0034] Therefore, in order to solve the above problems and realize the function of reducing the residual impurities in the natural gas, the utility model discloses a kind of gas-liquid separation device for the front end of compressor set, refer to Figs. 1-3The utility model relates to a gas-liquid separation device, including horizontal tank body 1 and separation cavity, the top of horizontal tank body 1 is circumscribed with intake pipe 2 and exhaust pipe 3 respectively, the separation cavity is set up in the inside of horizontal tank body 1, the output end of intake pipe 2 passes through horizontal tank body 1 and is communicated with separation cavity, and the outside gas is guided into separation cavity by intake pipe 2, the input end of exhaust pipe 3 passes through horizontal tank body 1 and is communicated with separation cavity, and the gas in separation cavity is discharged by exhaust pipe 3, specifically, separation mechanism is equipped in the separation cavity, including shielding portion and sieve hopper 10, the shielding portion is located on the inner wall of separation cavity, and shielding portion is located between the output end of intake pipe 2 and the input end of exhaust pipe 3, the sieve hopper 10 is connected with the input end of exhaust pipe 3, wherein, the inside of sieve hopper 10 is equipped with sieve air channel 12, the input end of sieve air channel 12 is towards shielding portion, the output end of sieve air channel 12 is connected with the input end of exhaust pipe 3, and the inner wall of sieve air channel 12 is equipped with adsorption layer 13.

[0035] In the embodiment, when intake pipe 2 introduces natural gas from gas well into separation cavity, shielding portion will first contact with natural gas, at this time, natural gas will flow due to the blocking, and the liquid in natural gas will adhere to shielding portion, to achieve the purpose of gas-liquid separation, and then the gas flowing to exhaust pipe 3 will pass through sieve air channel 12, and the gas will be filtered by adsorption layer 13 in sieve air channel 12.

[0036] Adsorption layer 13 is made of material with high adsorption performance, such as activated carbon or molecular sieve, which can effectively adsorb small particles and impurities in the gas. The gas treated by adsorption layer will become cleaner, then enter exhaust pipe 3 through the output end of sieve air channel 12, and finally be discharged from horizontal tank body 1 into compressor unit. Thus, not only the purity of the gas is improved, but also the service life of the gas-liquid separation device is prolonged, and the stability and safety of gas well production are ensured.

[0037] It should be noted that the input end of intake pipe 2 is installed in gas well, and the output end of exhaust pipe 3 is connected with compressor unit. In actual work, intake pipe 2 introduces natural gas in gas well into horizontal tank body 1, and these natural gas is subjected to gas-liquid separation in separation cavity, and finally introduced into compressor unit through exhaust pipe 3.

[0038] In one embodiment, sieve air channel 12 is arranged in an "S" shape. Compared with linear air channel, the "S" shaped air channel can make the gas turn several times when passing through, increasing the opportunity of contact between the gas and adsorption layer 13, thereby improving the adsorption efficiency.

[0039] Meanwhile, the "S" shape structure can also lengthen the length of the flow channel, effectively prolonging the residence time of the gas in sieve air channel 12, so that small particles and impurities have more opportunities to be captured by the adsorption material.

[0040] In addition, in order to further improve the adsorption effect of impurities in the gas, the output end of the screening gas passage 12 is provided with a gas guide pipe 11, wherein the gas guide pipe 11 is internally provided with a Venturi structure, and the flow rate of the gas entering the screening gas passage 12 is further improved by utilizing the Venturi effect, so that the gas has a high flow rate before entering the "S" type screening gas passage 12. The high-speed flowing gas can more effectively contact the adsorption layer 13, and the adsorption efficiency is further improved.

[0041] Further, the liquid in the natural gas adheres to the shielding part and falls into the liquid accumulation bin 9 under the action of gravity and is finally discharged through the blowdown pipe 4. Specifically, the liquid accumulation bin 9 is arranged in the interior of the horizontal tank body 1 and is arranged at the bottom of the separation cavity. The blowdown pipe 4 is arranged at the bottom of the horizontal tank body 1 and is communicated with the liquid accumulation bin 9. An opening for communicating with the liquid accumulation bin 9 is arranged on the inner wall of the bottom of the separation cavity. The liquid adhering to the shielding part falls toward the bottom of the separation cavity under the action of gravity and falls into the liquid accumulation bin 9 through the opening arranged on the inner wall of the bottom of the separation cavity.

[0042] In one embodiment, the inner walls on both sides of the liquid accumulation bin 9 are arranged in an inclined manner, so that the bottom of the liquid accumulation bin 9 is funnel-shaped, facilitating the liquid to be concentrated and smoothly discharged through the blowdown pipe 4. A valve is connected to the outlet end of the blowdown pipe 4, so as to facilitate the operator to control the discharge of the liquid according to needs. A liquid level indicator is further arranged at the top of the liquid accumulation bin 9, for monitoring the liquid height in the liquid accumulation bin and ensuring the normal operation of the separation device.

[0043] Embodiment two

[0044] On the basis of embodiment one, in order to improve the flow guiding force of the shielding part on the natural gas, referring to Fig. 2 The utility model also includes upper baffle 7 and lower baffle 8, specifically, the top of upper baffle 7 is fixed on the inner wall of the top of separation cavity, and the bottom of upper baffle 7 and the bottom of separation cavity leave a gap, the bottom of lower baffle 8 is fixed on the inner wall of the bottom of separation cavity, and the top of lower baffle 8 and the top of separation cavity leave a gap, wherein, upper baffle 7 and lower baffle 8 are arranged in separation cavity in axial interval staggered.

[0045] In the embodiment, the above-mentioned arrangement can continuously change the flow direction of the natural gas, so that the natural gas flows in an S-shaped path. In this case, the fluid Reynolds number is large. Since the mass of the liquid is greater than that of the gas, the liquid has a large inertia and is adsorbed on the baffle to form a liquid film, which is further gathered into liquid droplets and flows into the liquid accumulation bin 9 under the action of gravitational acceleration.

[0046] Further, in order to ensure the smooth flow of liquid on the upper cover plate 7 or the lower cover plate 8, the surface of the upper cover plate 7 and the lower cover plate 8 is provided with a flow channel for the flow of liquid, wherein the flow channel is a series of grooves extending towards the liquid storage compartment 9, and the grooves are arranged to facilitate the smooth flow of liquid along the surface of the cover plate and reduce the residence time of the liquid on the cover plate.

[0047] Embodiment three

[0048] Based on the embodiments one and two, referring to Fig. 2 The utility model also includes the spiral pipe 5 for carrying out the preliminary separation to the natural gas, specific, the spiral pipe 5 is located in the separation cavity, the input end of spiral pipe 5 is connected to the output end of gas inlet pipe 2, the output end of spiral pipe 5 is towards the sheltering portion, wherein, the bottom of the spiral pipe 5 near output end side is provided with the preliminary sieve hole 6.

[0049] In this embodiment, when the gas inlet pipe 2 leads the natural gas in the gas well into the separation cavity, the gas will first be subjected to preliminary gas-liquid separation by the spiral pipe 5. By the spiral pipe 5, the natural gas forms a rotational flow when passing through the spiral pipe 5, which increases the centrifugal force of the liquid particles in the gas-liquid mixture, so that the liquid particles are more easily thrown to the inner wall of the spiral pipe 5 and discharged through the preliminary sieve hole 6. In this way, the large liquid particles are separated before contacting the sheltering portion, thereby reducing the separation pressure of the sheltering portion and improving the separation efficiency of the entire device.

[0050] At the same time, the flow rate and flow direction of the natural gas after being treated by the spiral pipe 5 are optimized, laying a foundation for subsequent fine separation.

[0051] In summary, in combination with the embodiments one to three, the working steps of the gas-liquid separation device for the front end of the compressor unit are as follows:

[0052] First, the natural gas in the gas well is introduced into the separation cavity through the gas inlet pipe 2, and the gas is subjected to preliminary separation in the spiral pipe 5, the liquid particles are thrown to the inner wall of the spiral pipe 5 and discharged through the preliminary sieve hole 6, completing the preliminary separation.

[0053] Subsequently, the natural gas enters the separation cavity and contacts the sheltering portion, the liquid particles adhere to the sheltering portion, realizing gas-liquid separation. The gas that turns around continues to flow to the sieve gas channel 12, and the small particles and impurities in the gas are effectively adsorbed under the action of the adsorption layer 13, and the gas is further purified. The treated gas is discharged through the gas outlet pipe 3 and enters the compressor unit. At the same time, the liquid particles fall into the liquid storage compartment 9 under the action of gravity and are discharged through the blowdown pipe 4.

[0054] Through the above steps, efficient gas-liquid separation of natural gas in gas well production is realized, and the purity of the gas and the stable operation of the device are ensured.

[0055] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

[0056] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas-liquid separation device for compressor front end, comprising a horizontal tank body (1) and a separation cavity, the top of the horizontal tank body (1) is respectively circumscribed with an air inlet pipe (2) and an air outlet pipe (3), the separation cavity is opened inside the horizontal tank body (1), the output end of the air inlet pipe (2) communicates with the separation cavity through the horizontal tank body (1), external gas is introduced into the separation cavity by the air inlet pipe (2), the input end of the air outlet pipe (3) communicates with the separation cavity through the horizontal tank body (1), gas in the separation cavity is discharged by the air outlet pipe (3), characterized in that, The separation cavity is provided with a separation mechanism; The separation mechanism comprises: The blocking part is arranged on the inner wall of the separation cavity and is located between the output end of the air inlet pipe (2) and the input end of the air outlet pipe (3); The sifting hopper (10) is connected with the input end of the air outlet pipe (3); The sifting hopper (10) is internally provided with a sifting air channel (12), the input end of the sifting air channel (12) faces the blocking part, the output end of the sifting air channel (12) is connected with the input end of the air outlet pipe (3), and the inner wall of the sifting air channel (12) is provided with an adsorption layer (13).

2. The gas-liquid separation device for compressor front end of claim 1, wherein, The blocking part comprises: The upper baffle (7) is fixed at the top of the inner wall of the separation cavity, and a gap is left between the bottom of the upper baffle (7) and the inner wall of the bottom of the separation cavity; The lower baffle (8) is fixed at the bottom of the inner wall of the separation cavity, and a gap is left between the top of the lower baffle (8) and the top of the separation cavity; The upper baffle (7) and the lower baffle (8) are arranged in the separation cavity in an axial staggered manner.

3. The gas-liquid separation device for compressor front end of claim 2, wherein, The surfaces of the upper baffle (7) and the lower baffle (8) are provided with flow channels for liquid flow.

4. The gas-liquid separation device for compressor front end of claim 1, wherein, Further comprising: The liquid accumulation bin (9) is arranged in the inner part of the horizontal tank body (1) and is arranged at the bottom of the separation cavity; The blowdown pipe (4) is arranged at the bottom of the horizontal tank body (1) and is connected with the liquid accumulation bin (9); The bottom inner wall of the separation cavity is provided with an opening for connecting the liquid accumulation bin (9).

5. The gas-liquid separation device for compressor front end of claim 4, wherein, The inner walls on both sides of the liquid accumulation bin (9) are arranged in an inclined manner.

6. The gas-liquid separation device for compressor front end of claim 1, wherein, Further comprising: The spiral coil pipe (5) is arranged in the separation cavity, the input end of the spiral coil pipe (5) is connected with the output end of the air inlet pipe (2), and the output end of the spiral coil pipe (5) faces the blocking part; wherein the spiral coil pipe (5) is provided with a primary sieve hole (6) at the bottom of the side close to the output end.

7. The gas-liquid separation device for compressor front end of claim 1, wherein, The sifting air channel (12) is arranged in an "S" shape.

8. The gas-liquid separation device for compressor front end of claim 7, wherein, The output end of the sifting air channel (12) is provided with a gas guide pipe (11), wherein the gas guide pipe (11) is internally provided with a Venturi structure.

Images