A distributed compressed air energy storage device

Abstract

The present invention provides a distributed compressed air energy storage device, the system includes an air storage structure, a pre-air storage structure, a filtering structure, a heat exchange structure, an air delivery structure and a sewage discharge structure, the air delivery structure includes an air delivery pipeline, the air storage structure is connected to the heat exchange structure, the filtering structure is arranged inside the air storage structure, the air storage structure is also connected to the sewage discharge structure, the system also includes a moisture absorption structure and an air state detection structure, the moisture absorption structure is connected to the air storage structure, the air storage structure includes an air storage tank, the pre-air storage structure includes a pre-air storage tank, the air state detection structure is connected to the air inlet of the system, the air state detection structure is connected to the pre-air storage structure, the pre-air storage structure is connected to the moisture absorption structure, and a control valve is arranged at the air outlet end of the pre-air storage structure, and a sealing ring is arranged at each structural connection part to meet the sealing requirements of the delivered air, and each structure is arranged on the air delivery pipeline, which greatly improves the air dehumidification efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage, and in particular to a distributed compressed air energy storage device. Background Art

[0002] Compressed air energy storage refers to the energy storage method that uses electric energy to compress air during the low load period of the power grid, and releases compressed air during the peak load period to drive the steam turbine to generate electricity. The main forms are traditional compressed air energy storage system, compressed air energy storage system with heat storage device, and liquid-gas compression energy storage system. Compressed air energy storage (CAES) refers to the energy storage method that uses electric energy to compress air during the low load period of the power grid, seals the air at high pressure in abandoned mines, sunken submarine gas storage tanks, caves, expired oil and gas wells or newly built gas storage wells, and releases compressed air during the peak load period of the power grid to drive the steam turbine to generate electricity. There are also various forms of compressed air energy storage systems. According to the working medium, storage medium and heat source, they can be divided into: traditional compressed air energy storage system (requires fossil fuel combustion), compressed air energy storage system with heat storage device, and liquid-gas compression energy storage system. In the process of air energy storage, the air needs to be fully dehumidified, but the dehumidification effect of common air storage devices on the air is average. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a distributed compressed air energy storage device, the system includes an air storage structure, a pre-air storage structure, a filtering structure, a heat exchange structure, an air delivery structure and a sewage discharge structure, the air delivery structure includes an air delivery pipeline, the air storage structure is connected to the heat exchange structure, the filtering structure is arranged inside the air storage structure, the air storage structure is also connected to the sewage discharge structure, the sewage discharge structure is arranged at the bottom position of the air storage structure, and is used for discharging impurities and waste inside the air storage tank, the system also includes a moisture absorption structure and an air state detection structure, the moisture absorption structure is connected to the air storage structure, the air storage structure includes an air storage tank, the pre-air storage structure includes a pre-air storage tank, the air state detection structure is connected to the air inlet of the system, the air state detection structure is connected to the pre-air storage structure, the pre-air storage structure is connected to the moisture absorption structure, the air outlet end of the pre-air storage structure is provided with a control valve, and a sealing ring is provided at the part where each structure is connected to meet the sealing requirements of conveying air, and each structure is arranged on the air delivery pipeline.

[0004] As an improvement of the present invention, the desiccant structure includes a first desiccant pipe, a second desiccant pipe and a third desiccant pipe. The plurality of desiccant pipes are provided to disperse the circulation of air, so as to better remove moisture from the air. The three desiccant pipes are respectively provided with a first desiccant tank, a second desiccant tank and a third desiccant tank. The air inlet and the air outlet of the first desiccant tank, the second desiccant tank and the third desiccant tank are provided with control valves. The control valves are used to control the desiccant absorption mode of conveying air. The diameter of the air inlet is larger than the diameter of the first desiccant tank, the second desiccant tank and the third desiccant tank. diameter, the distance between the first desiccant duct and the air delivery duct is smaller than the distance between the second desiccant duct and the third desiccant duct and the air delivery duct. Such a design can improve the dehumidification efficiency of the air without affecting the air circulation speed. The volume of the first desiccant tank is larger than the volume of the second desiccant tank and the third desiccant tank. The first desiccant tank, the second desiccant tank and the third desiccant tank are not located at the same horizontal line. The staggered arrangement of the first desiccant tank, the second desiccant tank and the third desiccant tank can save space and reduce the air circulation distance while retaining multi-channel dehumidification.

[0005] As an improvement of the present invention, the air state detection structure includes a detection box, and a silica gel moisture absorption structure is arranged in the detection box. The silica gel moisture absorption structure is to be able to more intuitively observe the humidity in the air, so as to accurately control the subsequent moisture absorption step.

[0006] As an improvement of the present invention, the first desiccant, the second desiccant and the third desiccant are detachably connected to the desiccant pipe, and the detachable structure can facilitate cleaning or replacing other desiccants while one desiccant is working.

[0007] As an improvement of the present invention, the detection box is provided with an observation part, and the observation part can be provided with a transparent observation window. The current humidity of the air in the pre-storage gas tank can be visually observed through the transparent observation window, which is convenient for the subsequent control of the moisture absorption step. When the air humidity is not high, it can be known by observing the discoloration of the silica gel in the box, so that only one or two moisture absorption pipes can be opened to allow air to pass, thereby improving the efficiency of air entering the tank.

[0008] As an improvement of the present invention, the silica gel moisture absorption structure is arranged in the installation grooves around the detection box, the installation grooves and the middle ventilation channel have a mounting plate, and the mounting plate has a perforated structure to facilitate full contact between air and silica gel.

[0009] As an improvement of the present invention, a drying structure is arranged inside the first desiccant, the second desiccant and the third desiccant. The drying structure may be a desiccant or other substance capable of drying the air. Similar to the internal structure of the detection box, an installation groove structure in contact with the air is arranged.

[0010] The beneficial effects of the present invention are as follows: the first desiccant, the second desiccant and the third desiccant of the present invention can fully dry and dehumidify the air transported into the air storage tank, thereby improving the air dehumidification efficiency; the first desiccant, the second desiccant and the third desiccant are detachably connected to the desiccant pipe; the detachable structure can facilitate the cleaning or replacement of other desiccants while one desiccant is working; at the same time, the air state detection structure provided includes a detection box, and a silica gel desiccant structure is provided in the detection box; the silica gel desiccant structure is designed to be able to more intuitively observe the humidity in the air, so as to accurately control the subsequent desiccant steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the energy storage device described in the present invention.

[0012] List of reference numerals: air inlet 100, air delivery duct 101, pre-air storage structure 102, silica gel moisture absorption structure 103, moisture absorption structure 104, air storage structure 105, air state detection structure 106, observation window 107, through-hole structure 108, mounting plate 109, control valve 110, first moisture absorption duct 111, second moisture absorption duct 112, drying structure 113, second moisture absorption tank 114, third moisture absorption tank 115, first moisture absorption tank 116, third moisture absorption duct 117, sealing ring 118, mounting groove 119. DETAILED DESCRIPTION

[0013] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0014] Example: See Figure 1The present invention provides a distributed compressed air energy storage device, the system includes an air storage structure 105, a pre-air storage structure 102, a filtering structure, a heat exchange structure, an air delivery structure and a sewage discharge structure, the air delivery structure includes an air delivery pipeline 101, the air storage structure 105 is connected to the heat exchange structure, the filtering structure is arranged inside the air storage structure 105, the air storage structure 105 is also connected to the sewage discharge structure, the sewage discharge structure is arranged at the bottom of the air storage structure 105, and is used to discharge impurities and waste inside the air storage tank, the system also includes a moisture absorption structure 104 and an air state detection structure 106, The hygroscopic structure 104 is connected to the gas storage structure 105, the gas storage structure 105 includes a gas storage tank, the pre-gas storage structure 102 includes a pre-gas storage tank, the air state detection structure 106 is connected to the air inlet 100 of the system, the air state detection structure 106 is connected to the pre-gas storage structure 102, the pre-gas storage structure 102 is connected to the hygroscopic structure 104, and the air outlet end of the pre-gas storage structure 102 is provided with a control valve 110, and a sealing ring 118 is provided at the connecting part of each structure to meet the sealing requirements of the conveyed air, and each structure is arranged on the air conveying pipeline 101. The desiccant structure 104 comprises a first desiccant pipe 111, a second desiccant pipe 112 and a third desiccant pipe 117. The plurality of desiccant pipes are arranged to disperse the circulation of air so as to better remove moisture from the air. The three desiccant pipes are respectively provided with a first desiccant tank 116, a second desiccant tank 114 and a third desiccant tank 115. The air inlet and the air outlet of the first desiccant tank 116, the second desiccant tank 114 and the third desiccant tank 115 are provided with a control valve 110. The control valve 110 is used to control the desiccant absorption mode of conveying air. The diameter of the air inlet 100 is larger than the diameter of the first desiccant tank 116, the second desiccant tank 114 and the third desiccant tank 115. The distance between the first moisture absorption pipe 111 and the air delivery pipe 101 is smaller than the distance between the second moisture absorption pipe 112 and the third moisture absorption pipe 117 and the air delivery pipe 101. Such a design can improve the dehumidification efficiency of the air without affecting the air circulation speed. The volume of the first moisture absorption tank 116 is larger than the volume of the second moisture absorption tank 114 and the third moisture absorption tank 115. The first moisture absorption tank 116 and the second moisture absorption tank 114 and the third moisture absorption tank 115 are not located at the same horizontal line. The staggered arrangement of the first moisture absorption tank 116 and the second moisture absorption tank 114 and the third moisture absorption tank 115 can save space and reduce the distance of air circulation while retaining multi-channel dehumidification. The air state detection structure 106 includes a detection box, and a silica gel moisture absorption structure 103 is arranged in the detection box. The silica gel moisture absorption structure 103 is to be able to more intuitively observe the humidity in the air, so as to accurately control the subsequent moisture absorption steps.The first moisture absorption tank 116, the second moisture absorption tank 114 and the third moisture absorption tank 115 are detachably connected to the moisture absorption pipeline. The detachable structure can facilitate the cleaning or replacement of other moisture absorption tanks while one moisture absorption tank is working. The first moisture absorption tank 116, the second moisture absorption tank 114 and the third moisture absorption tank 115 are provided with a drying structure 113 inside. The drying structure 113 can be a desiccant or other substances that can dry air. The detection box is provided with an observation part. The observation part can be provided with a transparent observation window 107. Through the transparent observation window 107, the current humidity of the air in the pre-storage gas tank can be directly observed, which is convenient for the subsequent control of the moisture absorption step. When the air humidity is not high, it can be known by observing the color change of the silica gel moisture absorption structure 103 in the box, so that only one or two moisture absorption pipelines can be opened to allow air to pass, thereby improving the efficiency of air entering the tank. The silica gel moisture absorption structure 103 is arranged in the installation groove 119 around the detection box, and the installation groove 119 and the middle ventilation channel have a mounting plate.

[0015] 109 , the mounting plate 109 has a through-hole structure 108 , which facilitates full contact between air and silica gel 103 .

[0016] Working process: air enters the air delivery pipe 101 through the air inlet 100, and enters the detection box in the air state detection structure 106. After the humidity is detected inside the detection box, the air enters the pre-storage gas tank. At this time, the control valve 110 at the outlet end of the pre-storage gas tank is closed. The required moisture absorption method is selected according to the color change degree of the silica gel moisture absorption structure 103. When the color change degree of the silica gel moisture absorption structure 103 is one degree, the first moisture absorption pipe 111 is selected to open, and the second moisture absorption pipe 112 and the third moisture absorption pipe 117 are closed. When the discoloration degree of the silica gel 103 is two degrees, the first moisture absorption pipe 111 and the second moisture absorption pipe 112 are opened, and the third moisture absorption pipe 117 is closed. When the discoloration degree of the silica gel moisture absorption structure 103 is three degrees, the first moisture absorption pipe 111, the second moisture absorption pipe 112 and the third moisture absorption pipe 117 are all opened to improve the moisture absorption effect of the air. After selecting a suitable moisture absorption method, the air enters the corresponding moisture absorption tank for drying and then enters the gas storage tank. At this time, the air inside the gas storage tank has completed an effective drying and dehumidification step.

[0017] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] Finally, it should be noted that the embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A distributed compressed air energy storage device, characterized in that The device comprises an air storage structure (105), a pre-air storage structure (102), a filtering structure, a heat exchange structure, an air delivery structure and a sewage discharge structure. The air delivery structure comprises an air delivery pipeline (101). The air storage structure (105) is connected to the heat exchange structure. The filtering structure is arranged inside the air storage structure (105). The air storage structure (105) is also connected to the sewage discharge structure. The device also comprises a moisture absorption structure (104) and an air state detection structure (106). The moisture absorption structure (104) and the air state detection structure (106) are connected to the air storage structure (105). The air state detection structure (106) is connected to an air inlet (100) of the system, the air state detection structure (106) is connected to the pre-air storage structure (102), the pre-air storage structure (102) is connected to a moisture absorption structure (104), a control valve (110) is provided at an air outlet of the pre-air storage structure (102), and the moisture absorption structure (104) comprises a first moisture absorption pipeline (111), a second moisture absorption pipeline (112), and a second moisture absorption pipeline (113). The first desiccant tank (116), the second desiccant tank (114) and the third desiccant tank (115) are respectively provided with a first desiccant tank (116), a second desiccant tank (114) and a third desiccant tank (115); the air inlets and air outlets of the first desiccant tank (116), the second desiccant tank (114) and the third desiccant tank (115) are both provided with control valves (110); the diameter of the air inlet (100) is larger than the diameters of the first desiccant tank (116), the second desiccant tank (114) and the third desiccant tank (115); the volume of the first desiccant tank (116) is larger than the volume of the second desiccant tank (115); The air state detection structure (106) comprises a detection box, a silica gel moisture absorption structure (103) is arranged in the detection box, and the detection box is provided with an observation window (107). The silica gel moisture absorption structure (103) is arranged in mounting grooves (119) around the detection box, and the mounting grooves (119) and the middle ventilation channel have mounting plates (109). The first moisture absorption tank (116), the second moisture absorption tank (114) and the third moisture absorption tank (115) are provided with drying structures (113) inside.

2. A distributed compressed air energy storage device according to claim 1, characterized in that: The first moisture absorption tank (116) is not located on the same horizontal line as the second moisture absorption tank (114) and the third moisture absorption tank (115).

3. A distributed compressed air energy storage device according to claim 2, characterized in that: The first moisture absorption tank (116), the second moisture absorption tank (114) and the third moisture absorption tank (115) are detachably connected to the moisture absorption pipeline.

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