Gas model coal plant structure

Abstract

The invention provides an air model coal plant structure, and belongs to the technical field of power plant civil engineering structures, the air model coal plant structure comprises a gravel layer, a wall body, an air inflation membrane assembly and a pressure stabilizing mechanism, and the air inflation membrane assembly comprises an air inflation membrane body and a steel cable net arranged on the outer wall of the air inflation membrane body. When encountering strong wind and typhoon, the inflatable membrane body transmits the borne load to the steel cable net, the stress of the steel cable net is distributed to the wall body, the bottom of the wall body is buried under the ground, and the gravel layer is pressed above the bottom surface of the periphery of the wall body, so that the safe support of the inflatable membrane body can be ensured. No column support is arranged in the gas model coal plant, so that the internal usable space is increased, a maintenance channel is safer, and process equipment and pipeline arrangement is smoother; beam column supporting is greatly saved, the wall body is adopted as a supporting structure of the pneumatic membrane body, and engineering investment is saved.

Description

Technical Field

[0001] The invention relates to the technical field of civil construction structures of power plants, in particular to a gas-molded coal plant structure. Background Art

[0002] At present, domestic coal-fired power plants generally choose to store coal in open-air coal yards. On the one hand, this does not meet the current environmental protection requirements and causes environmental pollution in the plant and surrounding areas. On the other hand, since coal powder is a dust-prone material, open-air stacking leads to a high loss rate and causes waste of resources.

[0003] The expansion project of the existing China Resources Haifeng project #3 and #4 units is located in Xiaomo Town, Shenshan Cooperation Zone, Shenzhen City, Guangdong Province. Due to the limited project site and the requirement for high coal storage capacity, a strip-type closed coal plant with an inflatable membrane structure was selected. However, the basic wind pressure at the project site exceeds 1.0kN / ㎡, and the strip-type closed coal plant with an inflatable membrane structure of the existing technology cannot meet the requirements of this project. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a gas-molded coal plant structure, which can improve the utilization rate of space and increase the coal storage capacity in sites with high wind loads and limited space.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an air-molded coal plant structure, comprising: a sand and gravel layer, a wall, an air-filled membrane assembly, and a pressure-stabilizing mechanism;

[0006] The wall is enclosed and connected above the ground, the bottom of the wall is buried below the ground, and the interior of the wall encloses an operating area for coal stacking;

[0007] The sand and gravel layer is located above the ground and is pressed above the bottom surface of the outer periphery of the wall;

[0008] The inflatable membrane assembly is covered on the top of the wall, and the inflatable membrane assembly includes an inflatable membrane body and a steel cable net arranged on the outer wall of the inflatable membrane body, and the edge of the inflatable membrane assembly is fixedly connected to the wall through the steel cable net;

[0009] The pressure stabilizing mechanism is arranged on the wall, and the pressure stabilizing mechanism has a pump charging air port, and the pump charging air port is communicated with the inside of the operation area for stabilizing the pressure of the operation area.

[0010] Preferably, an embedded part is provided on the top of the wall, and the steel cable net is fixedly connected to the embedded part.

[0011] Preferably, the inflatable membrane body comprises a main body membrane and two end membranes, the two end membranes are respectively connected to the two ends of the main body membrane along the length direction, and the two side edges of the main body membrane along the width direction and the two side edges opposite to each other of the end membranes are respectively connected to the top of the wall;

[0012] The main body film and the terminal film are both formed by stacking multiple layers of film bodies, and the number of film layers of the terminal film is not less than the number of film layers of the main body film.

[0013] Preferably, the inflatable membrane body further comprises a connecting membrane, and each of the end membranes is connected to the main body membrane via a connecting membrane;

[0014] The connecting membrane includes a first connecting area and a second connecting area, and the end membrane is connected to the main membrane through the first connecting area and the second connecting area in sequence. The first connecting area and the second connecting area both include multiple layers of membrane bodies stacked in sequence, and the number of membrane layers in the first connecting area is the same as that of the main membrane, and the number of membrane layers in the second connecting area is the same as that of the end membrane.

[0015] Preferably, the strength of the steel cable net corresponding to the second connection area and the end membrane is greater than the strength of the steel cable net corresponding to the first connection area and the main body membrane.

[0016] Preferably, the wall includes a wall body and a base, the wall body is located above the base, the wall body is fixedly connected to the base, the outer side of the base located in the operation area is buried under the ground, and the sand and gravel layer is pressed above the base on the outer side of the wall.

[0017] Preferably, it further comprises a pile body, wherein the pile body is penetrated through the base, and the base is fixedly connected to the ground through the pile body.

[0018] Preferably, it further comprises a bottom plate, the bottom plate is fixedly connected to the bottom of the base, the pile body is passed through the bottom plate, and the bottom plate is fixedly connected to the ground through the pile body.

[0019] Preferably, the bottom area of ​​the bottom plate is larger than the bottom area of ​​the base.

[0020] Preferably, the ratio of the vertical distance from the lowest point to the highest point of the inflatable membrane assembly to the width distance of the inflatable membrane assembly is not less than 1 / 3 and not more than 1 / 2.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides a safe and reliable gas-fired coal plant structure for use in high wind load areas; the gas-fired coal plant of the present invention has no column support inside, which increases the internal usable space, makes the maintenance passage safer, and makes the process equipment and pipeline layout smoother; it greatly saves beam and column support, adopts the wall as the supporting structure of the inflatable membrane body, and saves engineering investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the wall structure;

[0024] Figure 2 This is a schematic diagram of the external structure of the gas model coal plant in the length direction of the structure;

[0025] Figure 3 This is a schematic diagram of the external structure of the gas model coal plant in the width direction of the structure;

[0026] Figure 4 It is a top view of the inflatable membrane assembly;

[0027] Figure 5 This is a schematic diagram of the embedded parts structure.

[0028] In the figure:

[0029] 1. Sand and gravel layer; 2. Wall; 21. Operation area; 22. Embedded parts; 23. Wall body; 24. Base; 3. Inflatable membrane assembly; 31. Inflatable membrane body; 311. Main membrane; 312. End membrane; 313. Connecting membrane; 3131. First connecting area; 3132. Second connecting area; 32. Cable net; 4. Pressure stabilizing mechanism; 5. Pile body; 6. Bottom plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply 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 limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] In the description of the embodiments of the present application, it should be noted that, 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 replaceable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0033] Combination Figure 1-5 As shown, a pneumatic coal plant structure includes: a sand and gravel layer 1, a wall 2, an inflatable membrane assembly 3, and a pressure stabilizing mechanism 4; the wall 2 is enclosed and connected above the ground, the bottom of the wall 2 is buried below the ground, and the interior of the wall 2 is enclosed to form an operating area 21 for coal stacking; the sand and gravel layer 1 is located above the ground and is pressed above the bottom surface of the outer periphery of the wall 2; the inflatable membrane assembly 3 is covered on the top of the wall 2, and the inflatable membrane assembly 3 includes an inflatable membrane body 31 and a steel cable net 32 ​​arranged on the outer wall of the inflatable membrane body 31, and the edge of the inflatable membrane assembly 3 is fixedly connected to the wall 2 through the steel cable net 32; the pressure stabilizing mechanism 4 is arranged on the wall 2, and the pressure stabilizing mechanism 4 has a charging pump air port, and the charging pump air port is connected to the inside of the operating area 21 for stabilizing the pressure of the operating area 21.

[0034] For example, the wall 2 of the Haifeng Power Plant's air film coal yard is enclosed in a rectangle, and the dimensions of the operating area 21 are 243 meters long and 155 meters wide. The height from the bottom of the operating area 21 to the top of the inner wall of the inflatable membrane 31 is 55 meters. There is a bucket wheel stacker in the operating area 21. The maximum limit size of the bucket wheel stacker during operation is reserved for a safety distance of more than 5 meters from the top of the inner wall of the inflatable membrane 31. In order to consider the adequacy of the bucket wheel trolley travel, the inflatable membrane 31 structure on the short side of the air film coal yard adopts a nearly vertical design. Since the basic wind pressure at the location of the expansion project of the #3 and #4 units of the China Resources Haifeng Project exceeds 1.0kN / ㎡, the wind pressure of the Haifeng Power Plant air film coal yard is considered to be 1.32kN / ㎡ once in 100 years when designing the wind pressure, which meets the design requirements for resistance to a level 17 typhoon. Based on this, the pressure stabilizing mechanism 4 sets several air pressure gears, each increasing by 40Pa. Under special circumstances, such as in a typhoon, the air pressure can reach 700Pa~800Pa. The inflatable membrane body 31 of this project adopts high-strength and high-flexibility film materials as the main materials, and is built using the air pressure support principle in a sealed space. The steel cable net 32 ​​is composed of PE steel cables. The steel cable net 32 ​​is the most important safety barrier of the inflatable membrane body 31. The steel cable net 32 ​​adopts vertical and horizontal cross cables and covers the entire surface of the inflatable membrane body 31. The cable spacing is 2.2m, and the diameter of the steel core wire rope is not less than 22mm; the tensile strength (warp / weft) of the inflatable membrane body 31 is 9500 / 9000N / 5cm, the tear strength is not less than 1300N, and the peeling strength is not less than 130N / 5cm. When the inflatable membrane body 31 is processed and welded, in order to meet the welding requirements, the welding strength is not less than 85% of the strength of the membrane itself, and the weld width is not less than 80mm. When encountering strong winds or typhoons, the inflatable membrane 31 transfers the load it bears to the steel cable net 32, and the steel cable net 32 ​​distributes the force to the wall 2, which can ensure the safe support of the inflatable membrane 31. The wall 2 bears the strong upward pull of the inflatable membrane 31, and the bottom of the wall 2 is buried under the ground to resist the upward pull; the coal pile in the air membrane coal yard of Haifeng Power Plant is relatively high, which has a great thrust on the wall 2. The sand and gravel layer 1 is compacted on the periphery of the wall 2 to help resist the horizontal force and ensure the stability of the wall 2. The sand and gravel layer 1 is backfilled with medium-coarse sand or stone powder in layers and vibrated with water, and the compaction coefficient is not less than 0.94. After completion, the Haifeng Power Plant Air-Mounted Coal Yard is the largest air-moving coal yard in South China, with high space utilization, large coal storage capacity, and the ability to withstand a Category 17 typhoon. When the lights are turned on at night, the obvious China Resources Power Group logo can be seen on the outer surface of the inflatable membrane 31 from the airplane. The advantage of the Haifeng Power Plant Air-Mounted Coal Yard is that it solves the sealing problem of the million-unit strip coal yard of thermal power plants at one time, and its cost is lower than that of coal yards of other structures of the same area.

[0035] In some embodiments, the top of the wall 2 is provided with an embedded part 22, and the steel cable net 32 ​​is fixedly connected to the embedded part 22. Exemplarily, the embedded part 22 includes a cable embedded anchor bolt and a film embedded anchor bolt. When encountering strong winds or strong typhoons, the inflatable membrane 31 transfers the load it bears to the film embedded anchor bolt and the steel cable net 32, and the steel cable net 32 ​​distributes the force to the cable embedded anchor bolt and the wall 2, which is conducive to ensuring the safe support of the inflatable membrane 31.

[0036] In some embodiments, the inflatable membrane 31 includes a main membrane 311 and two end membranes 312, the two end membranes 312 are respectively connected to the two ends of the main membrane 311 in the length direction, and the two side edges of the main membrane 311 in the width direction and the two side edges opposite to each other of the end membranes 312 are respectively connected to the top of the wall 2; the main membrane 311 and the end membrane 312 are both formed by stacking multiple layers of membranes, and the number of membrane layers of the end membrane 312 is not less than the number of membrane layers of the main membrane 311. Exemplarily, the main membrane 311 adopts a double-layer membrane, and the end membrane 312 adopts a three-layer membrane, which is conducive to the inflatable membrane 31 to better withstand frequent typhoons and resist the impact of typhoons.

[0037] In some embodiments, the inflatable membrane 31 further includes a connecting membrane 313, and each of the end membranes 312 is connected to the main membrane 311 through a connecting membrane 313; the connecting membrane 313 includes a first connecting area 3131 and a second connecting area 3132, and the end membrane 312 is connected to the main membrane 311 through the first connecting area 3131 and the second connecting area 3132 in sequence, and the first connecting area 3131 and the second connecting area 3132 both include multiple layers of membranes stacked in sequence, and the number of membrane layers of the first connecting area 3131 is the same as the number of membrane layers of the main membrane 311, and the number of membrane layers of the second connecting area 3132 is the same as the number of membrane layers of the end membrane 312. Exemplarily, the first connecting area 3131 and the main membrane 311 use a double-layer membrane, and the second connecting area 3132 and the end membrane 312 use a three-layer membrane, which is conducive to enhancing the ability of the connection part of the inflatable membrane 31 to withstand frequent typhoons and ensure the safety of the inflatable membrane 31.

[0038] In some embodiments, the strength of the steel cable net 32 ​​corresponding to the second connection area 3132 and the end film 312 is greater than the strength of the steel cable net 32 ​​corresponding to the first connection area 3131 and the main film 311. Exemplarily, the steel cable net 32 ​​corresponding to the second connection area 3132 and the end film 312 is a double-layer cable net, and the steel cable net 32 ​​corresponding to the first connection area 3131 and the main film 311 is a single-layer cable net, which is conducive to strengthening the strength of the steel cable net 32 ​​at the main wind-bearing position of the inflatable membrane body 31, and ensuring the safety of the inflatable membrane assembly 3.

[0039] For example, the Haifeng Power Plant air membrane coal yard needs to withstand frequent typhoons in the southern region, so the overall inflatable membrane body 31 adopts a double-layer closed air membrane, and some positions such as the second connection area 3132 and the end membrane 312 adopt a three-layer membrane. Correspondingly, the steel cable net 32 ​​is based on the traditional cross steel cable net 32, and the strength of the steel cable net 32 ​​is increased by increasing the number of cable nets and the cable diameter at local positions and main wind load bearing surfaces according to calculations. For example, the steel cable net 32 ​​above the double-layer membrane area is a single-layer cable net, and the steel cable net 32 ​​above the triple-layer membrane area is a double-layer cable net, so they can together constitute an inflatable membrane assembly 3 that is sufficient to resist the impact of typhoons.

[0040] In some embodiments, the wall 2 includes a wall body 23 and a base 24, the wall body 23 is located above the base 24, the wall body 23 is fixedly connected to the base 24, the outer side of the base 24 located in the operation area 21 is buried under the ground, and the gravel layer 1 is pressed on the upper side of the base 24 outside the wall 2. The base 24 widens the buried area of ​​the wall 2 by the ground and the gravel layer 1, which is conducive to increasing the stability of the wall 2.

[0041] In some embodiments, the pneumatic coal plant structure further includes a pile body 5, which is penetrated on the base 24, and the base 24 is fixedly connected to the ground through the pile body 5. This is beneficial for the wall 2 to better resist the pulling force from the inflatable membrane assembly 3.

[0042] In some embodiments, the pneumatic coal plant structure further includes a bottom plate 6, the bottom plate 6 is fixedly connected to the bottom of the base 24, the pile body 5 is penetrated on the bottom plate 6, and the bottom plate 6 is fixedly connected to the ground through the pile body 5. It is beneficial for the bottom plate 6 and the pile body 5 to work together to resist the upward pull of the inflatable membrane 31 and the horizontal thrust of the coal pile.

[0043] In some embodiments, the bottom area of ​​the bottom plate 6 is larger than the bottom area of ​​the base 24. The active pressure of the coal stored in the coal plant can be better utilized to balance the upward pulling force of the inflatable membrane assembly 3 on the wall 2, thereby increasing the stability of the wall 2.

[0044] In some embodiments, the ratio of the vertical distance from the lowest point to the highest point of the inflatable membrane assembly 3 to the width of the inflatable membrane assembly 3 is not less than 1 / 3 and not more than 1 / 2. This is beneficial to increase the coal storage space while ensuring the structural safety of the air membrane coal plant. In a coal plant with the same floor area, the air membrane coal plant of the present invention is more cost-effective than coal plants with other structures.

[0045] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A gas model coal plant structure, characterized in that: include: Sand and gravel layer, wall, inflatable membrane assembly, and pressure stabilizing mechanism; The wall is enclosed and connected above the ground, the bottom of the wall is buried below the ground, and the interior of the wall encloses an operating area for coal stacking; The sand and gravel layer is located above the ground and is pressed above the bottom surface of the outer periphery of the wall; The inflatable membrane assembly is covered on the top of the wall, and the inflatable membrane assembly includes an inflatable membrane body and a steel cable net arranged on the outer wall of the inflatable membrane body, and the edge of the inflatable membrane assembly is fixedly connected to the wall through the steel cable net; The pressure stabilizing mechanism is arranged on the wall, and has a pump charging air port, which is communicated with the inside of the operation area and is used for stabilizing the pressure of the operation area.

2. The gas model coal plant structure according to claim 1 is characterized in that: An embedded part is arranged on the top of the wall, and the steel cable net is fixedly connected to the embedded part.

3. The gas model coal plant structure according to claim 1 is characterized in that: The inflatable membrane body includes a main body membrane and two end membranes, the two end membranes are respectively connected to the two ends of the main body membrane along the length direction, and the two side edges of the main body membrane along the width direction and the two side edges opposite to each other of the end membranes are respectively connected to the top of the wall; The main body film and the terminal film are both formed by stacking multiple layers of film bodies, and the number of film layers of the terminal film is not less than the number of film layers of the main body film.

4. The gas model coal plant structure according to claim 3 is characterized in that: The inflatable membrane body further comprises a connecting membrane, and each of the end membranes is connected to the main body membrane via a connecting membrane; The connecting membrane includes a first connecting area and a second connecting area, and the end membrane is connected to the main membrane through the first connecting area and the second connecting area in sequence. The first connecting area and the second connecting area both include multiple layers of membrane bodies stacked in sequence, and the number of membrane layers in the first connecting area is the same as that of the main membrane, and the number of membrane layers in the second connecting area is the same as that of the end membrane.

5. The gas-molded coal plant structure according to claim 4 is characterized in that: The strength of the steel cable net corresponding to the second connection area and the end film is greater than the strength of the steel cable net corresponding to the first connection area and the main body film.

6. The gas model coal plant structure according to claim 1 is characterized in that: The wall includes a wall body and a base, the wall body is located above the base, the wall body is fixedly connected to the base, the outer side of the base located in the operation area is buried under the ground, and the sand and gravel layer is pressed above the base on the outer side of the wall.

7. The gas-molded coal plant structure according to claim 6 is characterized in that: It also includes a pile body, which is penetrated on the base, and the base is fixedly connected to the ground through the pile body.

8. The gas-molded coal plant structure according to claim 7, characterized in that: It also includes a bottom plate, which is fixedly connected to the bottom of the base, the pile body is passed through the bottom plate, and the bottom plate is fixedly connected to the ground through the pile body.

9. The gas model coal plant structure according to claim 8, characterized in that: The bottom area of ​​the bottom plate is larger than the bottom area of ​​the base.

10. The gas-molded coal plant structure according to claim 1, characterized in that: The ratio of the vertical distance from the lowest point to the highest point of the inflatable membrane assembly to the width distance of the inflatable membrane assembly is not less than 1 / 3 and not more than 1 / 2.

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