Exhaust funnel structure of expansion machine of high-capacity compressed air energy storage power station

Abstract

The utility model discloses an exhaust funnel structure of a high-capacity compressed air energy storage power station expansion machine, and relates to the technical field of exhaust of non-afterburning compressed air energy storage expansion machines. The sound absorption and noise reduction device comprises a cylinder and a sound absorption and noise reduction pore plate area, the cylinder comprises an air inlet, an air outlet and a flow guide plate; the sound absorption and noise reduction pore plate area is located in the barrel and comprises a plurality of sound absorption and noise reduction pore plates arranged at intervals. In the prior art, a silencer and an exhaust funnel of an expansion machine exhaust system of a high-capacity compressed air energy storage power station are separately arranged, the system integration degree is low, and the occupied area is large; according to the utility model, the silencer is integrated in the cylinder body, so that the integration level of the system is improved, and the occupied area is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust technology for non-supplementary combustion compressed air energy storage expanders, and more specifically to an exhaust cylinder structure for an expander of a large-capacity compressed air energy storage power station. Background Art

[0002] Energy storage is an important support for building a new power system. As the installed capacity and power generation of new energy sources such as wind and solar power continue to rise, the power system's demand for energy storage is becoming more urgent. Compressed air energy storage is currently recognized as a large-capacity, long-cycle energy storage technology comparable to pumped storage. It has the functions of peak regulation, frequency regulation, phase regulation, black start, and rotating standby, and has attracted widespread attention from scholars at home and abroad. Currently, there are many compressed air energy storage projects in China that have been put into commercial operation or are under construction. The capacity of the largest compressed air energy storage power station has developed to 300MW.

[0003] Limited by the low energy density of air, as the capacity of compressed air energy storage power stations increases, the air intake flow rate of air expanders is also getting larger and larger. Among them, the air intake flow rate of air expanders in 300MW compressed air energy storage power stations has reached about 2900t / h, which is basically equivalent to the steam intake flow rate of 1000MW steam turbines in conventional thermal power plants. After the huge flow of high-pressure air does work in the expander, the exhaust pressure of the expander's low-pressure cylinder drops to about atmospheric pressure, and the volume flow rate of the expander exhaust increases to dozens or even hundreds of times the intake air flow rate. Although the exhaust of the expander is non-toxic and harmless air, in order to ensure safe and civilized production and stable operation on site, the exhaust of the expander still needs to be safely discharged into the atmosphere through the exhaust pipe.

[0004] At present, the compressed air energy storage power station is still in the commercial demonstration stage, and there are no relevant regulations and specifications for the design of the expander exhaust pipe. The conventional practice of completed projects is that the exhaust of the expander first enters an independent silencer through the exhaust pipe for noise reduction, and then is discharged into the atmosphere through the exhaust pipe. Although the design according to this scheme can meet the noise reduction and safe emission requirements of the expander exhaust, the system integration is low, the process from the expander exhaust port to the exhaust pipe outlet is long, and the floor space is large. In addition, the exhaust port arranged in the open air can be equipped with or without a rain cover. When a rain cover is installed, the exhaust port position will increase some exhaust resistance, thereby reducing the efficiency of the expander. When no rain cover is installed, although some exhaust resistance can be reduced, there is a risk of rainwater flowing back into the expander through the exhaust pipe during rain or snow, thereby affecting the safe and stable operation of the unit.

[0005] Therefore, considering that compressed air energy storage is in a rapid development stage, in order to solve the above problems, it is very necessary to develop an exhaust cylinder structure with high system integration, saving exhaust system floor space, reducing exhaust resistance, and ensuring safe operation of the expander. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned background technology and to provide an exhaust cylinder structure of an expander of a large-capacity compressed air energy storage power station.

[0007] To achieve the above objectives, the technical solution of the present invention is: a large-capacity compressed air energy storage power station expander exhaust cylinder structure, characterized in that it includes a cylinder and a sound absorption and noise reduction orifice area arranged in the cylinder; the cylinder includes an air inlet arranged on the side of the cylinder, an exhaust port arranged on the top of the cylinder, and a guide plate arranged in the cylinder; one end of the guide plate is arranged below the air inlet, and the other end is connected to the inner wall of the cylinder at an angle upward;

[0008] The sound-absorbing and noise-reducing orifice plate area is located in the cylinder and is arranged between the guide plate and the exhaust port. The sound-absorbing and noise-reducing orifice plate area includes a plurality of sound-absorbing and noise-reducing orifice plates arranged at intervals. The sound-absorbing and noise-reducing orifice plate includes an outer shell and a soft and porous sound-absorbing material located in the outer shell.

[0009] In the above technical solution, a drainage system is also included, which includes a drain outlet, a U-shaped water seal and a drainage pipe. The drain outlet is arranged at one end of the guide plate close to the air inlet, and one end of the U-shaped water seal is connected to the drain outlet and the other end is connected to the drainage pipe.

[0010] In the above technical solution, an air intake compensator is provided at one end of the air inlet away from the cylinder.

[0011] In the above technical solution, a plurality of cylinder stiffening ribs are arranged at intervals on the surface of the cylinder.

[0012] In the above technical solution, the bottom side of the cylinder is connected to the exhaust pipe foundation through a skirt and anchor bolts.

[0013] In the above technical solution, the cylinder is provided with a first inspection hole and a second inspection hole, the first inspection hole is provided on the upper part of the guide plate, and the second inspection hole is provided on the lower part of the guide plate.

[0014] In the above technical solution, the guide plate includes a steel plate and steel plate stiffening ribs spaced apart on the back side of the steel plate.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1) In the prior art, the muffler of the expander exhaust system of a large-capacity compressed air energy storage power station is separately arranged from the exhaust pipe, resulting in low system integration and a large floor space. The present utility model integrates the muffler into the cylinder, thereby improving system integration and reducing floor space.

[0017] 2) Under the premise of ensuring that the exhaust pipe of the expander avoids the risk of rainwater backflow, the utility model eliminates the rain cover structure of the exhaust pipe in the prior art and integrates the drainage system under the guide plate, thereby reducing the flow resistance of the exhaust pipe and improving the overall efficiency of the expander.

[0018] 3) There are no regulations or specifications for the exhaust pipes of expanders in compressed air energy storage power stations under the existing standard system. This utility model provides a reference for the design of exhaust pipes for expanders in compressed air energy storage power stations, especially large-capacity expanders. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 Schematic diagram of the structure of the sound-absorbing and noise-reducing perforated plate.

[0021] Figure 3 for Figure 1 Cross-sectional view along the AA axis.

[0022] Figure 4 for Figure 3 Cross-sectional view along the BB direction.

[0023] Among them, 100-cylinder, 110-air inlet, 120-exhaust port, 130-guide plate, 131-steel plate, 1311-first steel plate, 1312-second steel plate, 132-steel plate stiffening ribs, 140-air inlet compensator, 150-cylinder stiffening ribs, 160-skirt and anchor bolts, 171-first inspection hole, 172-second inspection hole, 200-sound absorption and noise reduction orifice plate area, 210-sound absorption and noise reduction orifice plate, 211-shell, 212-sound absorption material, 300-drainage system, 310-drainage port, 320-U-shaped water seal, 330-drainage pipe, 400-exhaust pipe foundation. DETAILED DESCRIPTION

[0024] The following detailed description of the implementation of the present invention is provided in conjunction with the accompanying drawings, which do not limit the present invention and are merely examples. The advantages of the present invention will become clearer and easier to understand through the description.

[0025] Referring to the accompanying drawings, a large-capacity compressed air energy storage power station expander exhaust cylinder structure is characterized by comprising a cylinder 100 and a sound-absorbing and noise-reducing orifice plate area 200 disposed within the cylinder 100; the cylinder 100 includes an air inlet 110 disposed on the side of the cylinder 100, an exhaust port 120 disposed at the top of the cylinder 100, and a guide plate 130 disposed within the cylinder 100; one end of the guide plate 130 is disposed below the air inlet 110, and the other end is connected to the inner wall of the cylinder 100 at an angle upward;

[0026] The sound-absorbing and noise-reducing orifice plate area 200 is located in the cylinder 100 and is arranged between the guide plate 130 and the exhaust port 120. The sound-absorbing and noise-reducing orifice plate area 200 includes a plurality of sound-absorbing and noise-reducing orifice plates 210 arranged at intervals. The sound-absorbing and noise-reducing orifice plates 210 include an outer shell 211 and a soft and porous sound-absorbing material 212 located in the outer shell 211.

[0027] It also includes a drainage system 300, which includes a drain outlet 310, a U-shaped water seal 320 and a drainage pipe 330. The drain outlet 310 is arranged at one end of the guide plate 130 close to the air inlet 110, and one end of the U-shaped water seal 320 is connected to the drain outlet 310 and the other end is connected to the drainage pipe 330.

[0028] An air intake compensator 140 is provided at one end of the air inlet 110 away from the cylinder 100; the function of the air intake compensator 140 is to connect the expander exhaust pipe and the air inlet 110 of the cylinder 100, so as to absorb the thermal expansion of the expander exhaust pipe, avoid the thermal stress of the pipe from being transferred to the cylinder 100, and ensure the stability of the cylinder 100. A non-metallic or metal compensator structure can be adopted.

[0029] The surface of the cylinder 100 is provided with a plurality of cylinder stiffening ribs 150 at intervals. The cylinder stiffening ribs 150 are connected to the cylinder 100 by welding to ensure the strength and rigidity of the steel structure cylinder. Channel steel or angle steel can be used. When the diameter of the cylinder 100 is large, I-beam can also be used.

[0030] The bottom side of the cylinder 100 is connected to the exhaust pipe foundation 400 through a skirt and anchor bolts 160; the skirt and anchor bolts 160 are used to fix the cylinder 100 on the exhaust pipe foundation 400, and the specific number is determined according to the height and load of the cylinder 100.

[0031] The cylinder 100 is provided with a first inspection hole 171 and a second inspection hole 172; the first inspection hole 171 is provided at the upper part of the guide plate 130 for entering the interior of the cylinder 100 for inspection; the second inspection hole 172 is provided at the lower part of the guide plate 130, close to the exhaust chimney base 400, for easy entry, meeting the inspection requirements of the bottom of the cylinder 100 and the drainage system 300.

[0032] The guide plate 130 includes a steel plate 131 and steel plate stiffening ribs 132 spaced apart on the back of the steel plate 131 .

[0033] In actual use, the cylinder 100 can adopt a straight cylinder structure of steel structure or concrete structure, and adopt a ground-type foundation form; the cross-section of the cylinder 100 can be circular or rectangular, and circular is recommended; when a steel structure cylinder is adopted, the cylinder 100 is fixed to the exhaust chimney foundation 400 by anchor bolts; the exhaust port 120 of the cylinder 100 is recommended to be more than 2m higher than the highest point of the surrounding buildings.

[0034] The air inlet 110 can adopt a rectangular or circular structure, consistent with the exhaust pipe of the expander. The air inlet 110 and the air intake compensator 140 are connected by flange or welding; the shape of the exhaust port 120 is consistent with the shape of the cylinder 100, and a circular shape is recommended.

[0035] The guide plate 130 has two main functions. One is to deflect the air entering the cylinder 100 horizontally by 90 degrees, thereby reducing the local resistance when the air is turned, thereby reducing the overall resistance of the exhaust pipe and improving the efficiency of the expander. The other is to serve as a rainwater collection device. When it rains or snows, the rainwater or snow water that falls into the cylinder 100 is collected and discharged by the drainage system 300. The guide plate 130 is composed of a steel plate 131 and a steel plate stiffening rib 132. The steel plate stiffening rib 132 is mainly used to ensure the strength of the guide steel plate 131. The model and spacing of the steel plate stiffening rib 132 can be adjusted according to the size of the guide plate 130. The span and area are selected from angle steel, channel steel or I-beam; the steel plate 131 includes a first steel plate 1311 and a second steel plate 1312, one end of the first steel plate 1311 is set below the air inlet 110, and the other end is inclined upward and connected to the second steel plate 1312, one end of the second steel plate 1312 is connected to the first steel plate 1311, and the other end is inclined upward and connected to the inner wall of the cylinder 100; the first inspection hole 171 is located above the first steel plate 1311; the first steel plate 1311 is opened at the lowest point near the air inlet 110 as the drainage outlet 310 of the drainage system 300.

[0036] The main function of the drainage system 300 is to discharge the rainwater collected at the bottom of the guide plate 130 out of the cylinder 100 when it rains or snows, so as to prevent rainwater from flowing back into the expander through the air inlet 110; at the same time, when there is no rain or snow, the water column injected in advance can be used as a liquid seal to prevent the exhaust gas of the expander from being discharged through the drainage system 300, affecting the safe and civilized production in the surrounding area; the drainage outlet 310 is arranged at the lowest point of the guide plate 130 near the air inlet 110; the drainage pipes 330 are all made of steel pipes, and the pipe diameter can be determined according to the area of ​​the exhaust port 120 and the local rainfall; the U-shaped water seal 320 is also welded by the drainage pipe, and the water seal height is determined according to the exhaust resistance of the cylinder 100.

[0037] The main function of the sound-absorbing and noise-reducing orifice plate area 200 is to convert the sound energy of the expander exhaust flow noise into heat energy, thereby achieving the purpose of sound absorption and noise reduction, and ensuring that the exhaust noise of the exhaust cylinder body 100 meets the requirements of the surrounding sound environment; the outer shell 211 of the sound-absorbing and noise-reducing orifice plate 210 is a porous metal plate, and the inside of the outer shell 211 has a soft and porous sound-absorbing material. The sound-absorbing and noise-reducing orifice plate 210 and the cylinder body 100 are connected by welding or bolts; the area and number of the sound-absorbing and noise-reducing orifice plates 210 are calculated according to the actual noise reduction needs of the power station.

[0038] The method of using the utility model includes the following stages:

[0039] Phase 1: Before the first startup, a water column of a certain level is injected into the U-shaped water seal 320 of the drainage system 300. The height of the water column ensures that the exhaust gas of the expander does not overflow from the drainage system 300 during operation.

[0040] Phase 2: During normal operation, the expander exhaust enters the cylinder 100 through the exhaust pipe from the air inlet 110, is deflected 90 degrees by the guide plate 130, and then enters the sound absorption and noise reduction orifice area 200. After being silenced and noise-reduced, it is discharged into the atmosphere through the exhaust port 120.

[0041] Phase 3: When operating in rainy or snowy weather, the flow process of the expander exhaust is the same as that in Phase 2; the rainwater entering the cylinder 100 is collected in the guide plate 130 area and enters the drainage system 300 through the drain port 310. When the collected rainwater level is higher than the U-shaped water seal 320, the rainwater is discharged from the exhaust cylinder 100 through the drainage system 300.

[0042] Other parts not described belong to the prior art.

Claims

1. A large-capacity compressed air energy storage power station expander exhaust cylinder structure, characterized by: The invention comprises a cylinder (100) and a sound-absorbing and noise-reducing orifice plate region (200) arranged in the cylinder (100); the cylinder (100) comprises an air inlet (110) arranged on the side of the cylinder (100), an air outlet (120) arranged on the top of the cylinder (100), and a guide plate (130) arranged in the cylinder (100); one end of the guide plate (130) is arranged below the air inlet (110), and the other end is connected to the inner wall of the cylinder (100) at an angle upward. The sound absorption and noise reduction orifice plate area (200) is located in the cylinder (100) and is arranged between the guide plate (130) and the exhaust port (120). The sound absorption and noise reduction orifice plate area (200) includes a plurality of sound absorption and noise reduction orifice plates (210) arranged at intervals. The sound absorption and noise reduction orifice plates (210) include an outer shell (211) and a soft and porous sound absorption material (212) located in the outer shell (211).

2. The large-capacity compressed air energy storage power station expander exhaust cylinder structure according to claim 1 is characterized in that: The invention also includes a drainage system (300), wherein the drainage system (300) includes a drainage port (310), a U-shaped water seal (320), and a drainage pipe (330). The drainage port (310) is provided at one end of the guide plate (130) close to the air inlet (110), and one end of the U-shaped water seal (320) is connected to the drainage port (310) and the other end is connected to the drainage pipe (330).

3. The large-capacity compressed air energy storage power station expander exhaust cylinder structure according to claim 1 is characterized by: An air intake compensator (140) is provided at one end of the air intake (110) away from the cylinder (100).

4. The expander exhaust cylinder structure of a large-capacity compressed air energy storage power station according to claim 1 is characterized in that: A plurality of cylinder stiffening ribs (150) are arranged at intervals on the surface of the cylinder (100).

5. The large-capacity compressed air energy storage power station expander exhaust cylinder structure according to claim 1 is characterized in that: The bottom side of the cylinder (100) is connected to the exhaust pipe foundation (400) via a skirt and anchor bolts (160).

6. The large-capacity compressed air energy storage power station expander exhaust cylinder structure according to claim 5, characterized in that: The cylinder (100) is provided with a first inspection hole (171) and a second inspection hole (172), wherein the first inspection hole (171) is provided on the upper portion of the guide plate (130), and the second inspection hole (172) is provided on the lower portion of the guide plate (130).

7. The expander exhaust cylinder structure of a large-capacity compressed air energy storage power station according to claim 1 is characterized in that: The guide plate (130) comprises a steel plate (131) and steel plate stiffening ribs (132) arranged at intervals on the back of the steel plate (131).

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