CN-122006386-A - Energy storage compressed air sand and liquid removal integrated device and method

CN122006386ACN 122006386 ACN122006386 ACN 122006386ACN-122006386-A

Abstract

The invention aims to provide an energy-storage compressed air sand removal and liquid removal integrated device and method, which are used for effectively removing gravel and liquid drops carried when air is discharged in a compressed air energy storage and release stage of a waste oil and gas reservoir serving as a gas storage reservoir, so as to protect power generation equipment. The sand and liquid removing integrated device comprises a wet-type capturing section, a cyclone separation section and a filtering separation section. The cyclone separation section is positioned right above the wet-type capturing section and right below the filtering separation section. The cyclone separation section comprises an air inlet, an intermediate connector, a liquid discharge pipe, two pre-separation cyclone pipes and a fine separation cyclone pipe, wherein the lower end of the cyclone pipe is inserted into the wet type collecting section, and the two pre-separation cyclone pipes are connected with the air inlet of the device and are connected with the fine separation cyclone pipe in series through the intermediate connector to form a gravity sedimentation and inertial separation process. The filtering and separating section comprises a mist catcher and an air outlet. The energy storage compressed air sand and liquid removal integrated device provided by the invention is coupled with separation mechanisms such as centrifugal separation, gravity sedimentation, wet type trapping, inertial separation, filtering separation and the like, and can realize high-efficiency low-consumption removal of gravel and liquid drops in compressed air.

Inventors

WANG ZHENBO
ZHU LIYUN
LI XINHAO
Bi Jinghe

Assignees

中国石油大学(华东)

Dates

Publication Date: 20260512
Application Date: 20251114

Claims (8)

1. The integrated device for removing sand and liquid from energy storage compressed air is characterized by comprising a wet-type capturing section, a cyclone separation section and a filtering separation section. The cyclone separation section is positioned right above the wet-type capturing section and right below the filtering separation section. The cyclone separation section comprises an air inlet, an intermediate connector, a liquid discharge pipe, two pre-separation cyclone pipes and a fine separation cyclone pipe, wherein the lower end of the cyclone pipe is inserted into the wet-type collecting section, and the pre-separation cyclone pipe and the fine separation cyclone pipe are both fixed on the intermediate connector. The filtering and separating section comprises a mist catcher and an air outlet.
2. The integrated device for sand and liquid removal of energy storage compressed air according to claim 1, wherein the wet type trapping section comprises a water seal with a certain liquid level, a bottom cone section and a bottom outlet, and the wet type trapping and separating process and the pollution discharge process of particles are realized.
3. The integrated device for sand removal and liquid removal of energy storage compressed air according to claim 1, wherein the pre-separation swirl tube is of a single-cut type structure, two pre-separation swirl tubes are connected in parallel, and the fine swirl separation tube is of a double-volute type structure.
4. The integrated device for sand and liquid removal of energy storage compressed air according to claim 1, wherein the intermediate connector comprises an intermediate partition plate and an intermediate connecting piece, so that the inlet and the gas phase outlet of the preseparation cyclone respectively form gravity sedimentation and inertial separation processes, and the residence time of the gas-liquid-solid cyclone separation section is increased.
5. The integrated device for sand and liquid removal of energy storage compressed air according to claim 1, wherein an overflow pipe of the fine cyclone separation pipe of the cyclone separation section is inserted into the filtering separation section, a modified plate is arranged at the top of the overflow pipe, and gas enters the filtering separation section through a side hole, so that gas jet aggregation is improved, and liquid backflow of a mist capturing section is prevented.
6. The integrated device for sand removal and liquid removal of energy storage compressed air according to claim 1, wherein the top of the liquid discharge pipe is communicated with the filtering separation section, so that accumulated liquid at the bottom of the filtering separation section is discharged conveniently, and the bottom of the liquid discharge pipe is inserted into a water seal of the wet-type collecting section to prevent gas in the cyclone separation section from entering the liquid discharge pipe.
7. The energy storage compressed air sand and liquid removal integrated device according to claim 1, wherein the filter separation section mist catcher can be a baffle plate type or a wire mesh type.
8. A separation method using the energy storage compressed air sand removal and liquid removal integrated device according to any one of claims 1-7, comprising the following steps: 1) Compressed air carrying gravel and liquid drops enters a cyclone separation section from an air inlet of the device, the gravel and the liquid drops are thrown to the wall surface of the cyclone pipe through the centrifugal separation action of two pre-separation cyclone pipes, and flow into a water seal of a bottom wet-type collecting section from a dipleg to complete the wet-type collecting and separating process; 2) The rest gravel and the liquid drop are carried by gas phase to enter a refined separation cyclone tube, and after centrifugal separation again, most gravel and liquid drop flow into a water seal of a bottom wet type capturing section from a bottom flow port, and gas containing a small part of liquid drop and gravel enters a filtering separation section from an overflow port to further separate the gravel and the liquid drop; 3) Air carrying small parts of liquid drops and gravel enters the filtering and separating section through the cyclone flow dividing section, after being filtered and separated by the mist catcher, the liquid drops and particles slide along the side wall, flow into the wet type collecting section water seal through the liquid discharge pipe, and the separated air is discharged from the air outlet at the top of the device, so that the whole sand and liquid removing process is completed.

Description

Energy storage compressed air sand and liquid removal integrated device and method Technical Field The invention relates to the technical field of gas purification and separation equipment, in particular to an energy storage compressed air sand and liquid removal integrated device and method. Background The compressed air energy storage is taken as an important means for energy adjustment under a double-carbon background, wherein the waste oil and gas reservoir is taken as an infrastructure of the gas storage reservoir, the waste oil and gas well is innovatively utilized, the cost and the environmental influence for building new facilities are reduced, and the integration of renewable energy sources and the development of low-carbon economy are promoted. However, the waste oil and gas reservoir has low permeability, high water saturation and other complicated geological characteristics, and in the energy release process after the waste oil and gas reservoir is used for storing energy, the air pressure is high, the air quantity is large, the flow speed is high, a large amount of solid gravel is easy to carry, the precision requirement of the power generation equipment on the extracted compressed air is high, and the process of sand removal and liquid removal on the compressed air is very necessary before the high-pressure air enters the power generation equipment. The traditional sand and liquid removing technology for the oil and gas field mainly comprises the following main types of gravity sedimentation, which has the defects of low separation efficiency, low gas flow rate, huge equipment volume, long residence time, inapplicability to the purification of compressed air, filtration separation, which has the defects of large pressure drop, easy blockage, high cost, certain selection of the particle size of a disperse phase, difficult subsequent cleaning, inertial separation, which has the defects of limited separation efficiency, complex structural design, pressure drop caused after the airflow turns or impacts a baffle, and possibility of generating secondary entrainment phenomenon, namely the separated disperse phase can be taken away by high-speed gas again to influence the separation and purification effect, centrifugal separation, which has the advantages of simple structure, high separation efficiency, easy operation and the like, but has the defects of relatively good selection, the separation efficiency can be reduced after the gas flow rate exceeds a certain range. The device with single technology generally has the problems of large occupied space, large pressure drop, low efficiency, low precision and the like. Based on the method, aiming at the problems of air purification in compressed air energy storage and related treatment technologies, the efficient removal of gravel and liquid drops is realized, and the development of the compressed air sand and liquid removal device with multiple separation process coupling is significant. Disclosure of Invention In order to solve the technical problems, the invention aims to provide an energy storage compressed air sand and liquid removal integrated device and method, which are used for coupling separation mechanisms such as centrifugal separation, gravity sedimentation, wet type trapping, inertial separation, filtering separation and the like, realizing high-efficiency and low-consumption removal of gravel and liquid drops in compressed air, solving the problems of large occupied area of separation equipment, low separation efficiency, large pressure drop and the like, and avoiding the influence and damage of the gravel and the liquid drops in the compressed air on downstream power generation equipment. The energy storage compressed air sand and liquid removing integrated device is characterized by comprising a wet-type capturing section, a cyclone separation section and a filtering separation section. The cyclone separation section is positioned right above the wet-type capturing section and right below the filtering separation section. The cyclone separation section comprises an air inlet, an intermediate connector, a liquid discharge pipe, two pre-separation cyclone pipes and a fine separation cyclone pipe, wherein the lower end of the cyclone pipe is inserted into the wet-type collecting section, and the pre-separation cyclone pipe and the fine separation cyclone pipe are both fixed on the intermediate connector. The filtering and separating section comprises a mist catcher and an air outlet. The wet type trapping section comprises a water seal with a certain liquid level, a bottom cone section and a bottom outlet, and the wet type trapping and separating process and the pollution discharge process of particles are realized. The pre-separation cyclone tube is of a single-cut type structure, the two pre-separation cyclone tubes are connected in parallel, and the air inlet of the fine cyclone tube is of a double-volute type structure. The intermediat