Three-phase separation device for outgassing of salt-cavern gas storage

Abstract

The utility model discloses a three-phase separation device for outgassing of a salt-cavern gas storage. The three-phase separation device comprises a separation barrel, a separation component, a steel wire mesh separator, a pure air outlet, a mixed gas inlet, a solid particulate matter outlet and a brine and other liquid outlet, the steel wire mesh separator and the separation component are arranged in the separation cylinder from top to bottom and are spaced from each other; the pure air outlet is formed in the top end of the separation barrel, the solid particle outlet is formed in the bottom end of the separation barrel, the mixed gas inlet is formed in the outer wall of the bottom of the separation barrel, the upper end of the brine and other liquid outlet is formed in the separation barrel and communicated with the bottom of the separation component, and the lower end of the brine and other liquid outlet extends out of the separation barrel through the solid particle outlet. According to the utility model, brine and water-insoluble solid particles carried by high-pressure gas discharged from the salt cavern gas storage can be effectively separated, and the problem that the brine and the water-insoluble solid particles cause certain corrosion and erosion damage to downstream equipment and pipelines is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of salt cavern gas storage and relates to a three-phase separation device used in the gas release process of a salt cavern gas storage. Background Art

[0002] In the development process of existing salt cavern gas storage, the main method of cavitation is to dissolve the salt in water. In the process of cavitation, some insoluble substances will be produced and sink to the bottom of the cavity. The above-mentioned insoluble or insoluble substances are accumulated in the form of particles at the bottom of the salt cavity, and together with the brine in the gaps between the sediments, they constitute the sediment space part of the salt cavern gas storage.

[0003] Salt cavern compressed air energy storage technology is a new type of energy storage technology that uses salt caverns for gas storage. In the energy release stage, the compressed air coming out of the salt cavern gas storage device absorbs the compression heat stored in the energy storage stage through the heat exchanger. Then, the high-temperature and high-pressure compressed air enters the expander to perform work and realize energy release.

[0004] The problems with the above process are:

[0005] In the process of releasing high-pressure compressed air from salt caverns, brine and water-insoluble particles are inevitably carried in the high-speed airflow. The corrosive brine and solid particles carried by the high-speed airflow will cause certain corrosion and erosion damage to downstream equipment and pipelines. Utility Model Content

[0006] The purpose of the utility model is to provide a three-phase separation device for use in the gas release process of a salt cavern gas storage reservoir, to solve the problem of high-speed airflow carrying brine and particulate matter, to avoid certain corrosion and erosion damage to downstream equipment and pipelines, and to further improve the safety of the use of salt cavern gas storage reservoirs.

[0007] The technical solution adopted by the utility model is:

[0008] A three-phase separation device for releasing gas from a salt cavern gas storage reservoir comprises a separation cylinder, a separation member, a wire mesh separator, a pure air outlet, a mixed gas inlet, a solid particle outlet, and a brine and other liquid outlets, wherein the wire mesh separator and the separation member are arranged inside the separation cylinder from top to bottom with a spacing therebetween; the pure air outlet is arranged at the top of the separation cylinder, the solid particle outlet is arranged at the bottom of the separation cylinder, the mixed gas inlet is arranged on the outer wall of the bottom of the separation cylinder, the upper end of the brine and other liquid outlet is arranged in the separation cylinder and is connected to the bottom of the separation member, and the lower end extends out of the separation cylinder from the solid particle outlet.

[0009] The utility model also includes the following other technical features:

[0010] The separation component includes a baffle array, a cylinder and a gradually expanding section, and an elliptical concave section, which are arranged in sequence from top to bottom inside the separation cylinder, and there is a distance between the three sections; the cylinder and the gradually expanding section are an integral structure composed of a hollow cylinder and a gradually expanding hollow cone from bottom to top, and the lower end ports of the cylinder and the gradually expanding section are opposite to the elliptical concave section; the mixed gas inlet is located at a height corresponding to the distance between the cylinder and the gradually expanding section and the elliptical concave section, and the upper port of the brine and other liquid outlet is fixed and connected to the bottom end of the elliptical concave section.

[0011] The wire mesh separator is a cylinder composed of a wire mesh, and the side surface of the cylinder is fitted and fixed to the inner wall of the separation cylinder.

[0012] The baffle array is composed of multiple layers of baffles, with spacing between adjacent layers of baffles. Each layer has at least two baffles, and baffles on different layers are staggered.

[0013] The baffle is formed by fixing the ends of two plate bodies, and the longitudinal section of the baffle is an equilateral triangle.

[0014] The overall height of the baffle array is equal to the overall height of the cylinder and the gradually expanding section.

[0015] The solid particle outlet is a hollow cone that is larger at the top and smaller at the bottom. The elliptical concave section is connected to the upper part of the cone section of the solid particle outlet. A spiral flow channel is provided on the inner wall of the upper part of the solid particle outlet.

[0016] The brine and other liquid outlets, the solid particle outlet and the elliptical concave section are coaxial with the separation cylinder.

[0017] The mixed gas inlet is arranged in the tangential direction of the separation cylinder.

[0018] A pressure test interface is provided at the lower part of the pure air outlet pipe.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model adopts cyclone separation, a highly efficient multiphase separation technology. By arranging the gas phase outlet, the liquid phase outlet and the solid phase outlet at different positions of the separation cylinder respectively, multiphase separation is achieved by utilizing substances in different phases under the action of gravity and centrifugal force, which can effectively separate the brine and water-insoluble solid particles carried by the high-pressure gas discharged from the salt cavern gas storage reservoir, thereby solving the problem of certain corrosion and erosion damage to downstream equipment and pipelines caused by brine and water-insoluble solid particles, further improving the safety of the salt cavern gas storage reservoir, and the structure is easy to realize and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and examples.

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 It is a cross-sectional view of the bottom structure of the utility model.

[0024] In the figure, 1. pure air outlet, 2. wire mesh separator, 3. baffle array, 4. cylinder and gradually expanding section, 5. mixed gas inlet, 6. brine outlet, 7. solid particle outlet, 8. elliptical concave section, 9. separation cylinder. DETAILED DESCRIPTION

[0025] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0026] like Figure 1 As shown, the three-phase separation device for releasing gas from a salt cavern gas storage provided by the utility model comprises a separation cylinder 9, a separation member, a wire mesh separator 2, a pure air outlet 1, a mixed gas inlet 5, a solid particle outlet 7, and a brine and other liquid outlet 6, wherein the wire mesh separator 2 and the separation member are arranged inside the separation cylinder 9 from top to bottom with a spacing therebetween; the pure air outlet 1 is arranged at the top of the separation cylinder 9, the solid particle outlet 7 is arranged at the bottom of the separation cylinder 9, the mixed gas inlet 5 is arranged on the outer wall of the bottom of the separation cylinder 9, the upper end of the brine and other liquid outlet 6 is arranged inside the separation cylinder 9 and is connected to the bottom of the separation member, and the lower end extends out of the separation cylinder 9 from the solid particle outlet 7.

[0027] Preferably, the separation member includes a baffle array 3, a cylinder and gradually expanding section 4, and an elliptical concave section 8, which are sequentially arranged inside the separation cylinder 9 from top to bottom, and there is a spacing between the three sections; the cylinder and gradually expanding section 4 is an integral structure composed of a hollow cylinder and a gradually expanding hollow cone from bottom to top, and the lower end port of the cylinder and gradually expanding section 4 is directly opposite to the elliptical concave section 8; the mixed gas inlet 5 is located at a height corresponding to the spacing between the cylinder and gradually expanding section 4 and the elliptical concave section 8, and the upper port of the brine and other liquid outlet 6 is fixed and connected to the bottom end of the elliptical concave section 8. Preferably, each part of the separation member is welded and fixed to the cylinder 9.

[0028] The wire mesh separator 2 is a cylinder composed of a wire mesh, and the side of the cylinder is fixed to the inner wall of the separation cylinder 9; the gas in the separation cylinder 9 will be mixed with uncondensed brine mist during the rising and enrichment process. Under the action of the wire mesh separator 2, the volume of the brine droplets gradually gathers and increases, falls under the action of gravity, and is discharged through the drain pipe, thereby improving the separation effect of compressed air and brine.

[0029] The baffle array 3 is composed of multiple layers of baffles, with spacing between adjacent layers of baffles, at least two baffles in each layer, and baffles in different layers are staggered; preferably, the number of layers of the baffle array 3 is 3 to 4. Preferably, each baffle is formed by fixing the ends of two plates, and the longitudinal section of the baffle is an equilateral triangle, which can better filter the mixed gas rising through the cylinder and the gradually expanding section 4.

[0030] Preferably, the overall height of the baffle array 3 is equal to the overall height of the cylinder and the gradually expanding section 4, so that the filtering efficiency is higher.

[0031] The solid particle outlet 7 is a hollow cone that is larger at the top and smaller at the bottom. The elliptical concave section 8 is connected to the upper part of the cone section of the solid particle outlet 7. A spiral flow channel is provided on the upper inner wall of the solid particle outlet 7 to facilitate the cyclonic discharge of liquid and solid impurities.

[0032] The brine and other liquid outlets 6, the solid particle outlet 7 and the elliptical concave section 8 are coaxial with the separation cylinder 9, so that the overall distribution of the separation device is symmetrical and uniform, and the filtering effect is good.

[0033] like Figure 2 As shown, the elliptical concave section 8 is a plate body with the concave surface facing upward and the concave surface is in an arc shape, which is conducive to receiving and concentrating the free brine separated by the baffle array 3.

[0034] Preferably, the mixed gas inlet 5 is arranged in the tangential direction of the separation cylinder 9, which is conducive to the efficient entry of the external mixture into the separation cylinder 9, and extends 300-500mm from the cylinder in the tangential direction; the pure air outlet 1 is a cylindrical tube with a length of 9200-400mm.

[0035] A pressure test interface is provided at the lower part of the pure air outlet pipe 1 for monitoring whether the internal pressure of the separation cylinder 9 is abnormal.

[0036] The working principle of the utility model is as follows: the high-pressure air released from the salt cavern gas storage is mixed with brine and other liquids and other water-insoluble solid particles through the mixed gas inlet 5 and enters the separation cylinder 9 along the tangential direction, and generates high-speed vortex under the action of pressure and centrifugal force. Since the interface between the solid particle outlet 7 and the separation cylinder 9 is a spiral flow channel, a part of the liquid and solid phase in the mixed gas can be initially separated. The other part of the unseparated free brine and high-pressure gas continue to spirally rise in the separation cylinder 9. After passing through the cylinder and the gradually expanding section 4, the flow rate of the mixed gas decreases due to the increase in the flow channel cross-section. The free brine entrained by the gas under the action of gravity and the remaining unseparated solid particles are filtered by the baffle 3, realizing the further separation of gas and liquid and solid impurities. The separated free brine is discharged from the liquid outlet 7 corresponding to the elliptical concave section 8. As the high-pressure gas continues to rise along the separation device, the uncondensed gaseous brine can be further separated by the wire mesh separator 2 arranged on the upper part of the baffle 3, and the pure high-pressure air after multiple separations and filtrations leaves the separation device through the upper exhaust port 1.

[0037] The technical scope of the present invention is not limited to the contents in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A three-phase separation device for releasing gas from a salt cavern gas storage, characterized in that: It includes a separation cylinder, a separation component, a wire mesh separator, a pure air outlet, a mixed gas inlet, a solid particle outlet, and a brine and other liquid outlet, wherein the wire mesh separator and the separation component are arranged inside the separation cylinder from top to bottom with a distance between them; the pure air outlet is arranged at the top of the separation cylinder, the solid particle outlet is arranged at the bottom of the separation cylinder, the mixed gas inlet is arranged on the outer wall of the bottom of the separation cylinder, the upper end of the brine and other liquid outlet is arranged in the separation cylinder and connected with the bottom of the separation component, and the lower end extends out of the separation cylinder from the solid particle outlet.

2. The three-phase separation device for releasing gas from a salt cavern gas storage as claimed in claim 1, characterized in that: The separation component includes a baffle array, a cylinder and a gradually expanding section, and an elliptical concave section, which are arranged in sequence from top to bottom inside the separation cylinder, and there is a distance between the three sections; the cylinder and the gradually expanding section are an integral structure composed of a hollow cylinder and a gradually expanding hollow cone from bottom to top, and the lower end ports of the cylinder and the gradually expanding section are opposite to the elliptical concave section; the mixed gas inlet is located at a height corresponding to the distance between the cylinder and the gradually expanding section and the elliptical concave section, and the upper port of the brine and other liquid outlet is fixed and connected to the bottom end of the elliptical concave section.

3. The three-phase separation device for releasing gas from a salt cavern gas storage according to claim 1, characterized in that: The wire mesh separator is a cylinder composed of a wire mesh, and the side surface of the cylinder is fitted and fixed to the inner wall of the separation cylinder.

4. The three-phase separation device for releasing gas from a salt cavern gas storage as claimed in claim 2, characterized in that: The baffle array is composed of multiple layers of baffles, with spacing between adjacent layers of baffles. Each layer has at least two baffles, and baffles on different layers are staggered.

5. The three-phase separation device for releasing gas from a salt cavern gas storage as claimed in claim 4, characterized in that: The baffle is formed by fixing the ends of two plate bodies, and the longitudinal section of the baffle is an equilateral triangle.

6. The three-phase separation device for releasing gas from a salt cavern gas storage as claimed in claim 2, characterized in that: The overall height of the baffle array is equal to the overall height of the cylinder and the gradually expanding section.

7. The three-phase separation device for releasing gas from a salt cavern gas storage as claimed in claim 2, characterized in that: The solid particle outlet is a hollow cone that is larger at the top and smaller at the bottom. The elliptical concave section is connected to the upper part of the cone section of the solid particle outlet. A spiral flow channel is provided on the inner wall of the upper part of the solid particle outlet.

8. The three-phase separation device for releasing gas from a salt cavern gas storage according to any one of claims 1 to 7, characterized in that: The brine and other liquid outlets, the solid particle outlet and the elliptical concave section are coaxial with the separation cylinder.

9. The three-phase separation device for releasing gas from a salt cavern gas storage according to any one of claims 1 to 7, characterized in that: The mixed gas inlet is arranged in the tangential direction of the separation cylinder.

10. The three-phase separation device for releasing gas from a salt cavern gas storage according to any one of claims 1 to 7, characterized in that: A pressure test interface is provided at the lower part of the pure air outlet pipe.

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