Ventilation device for fused salt storage tank of photo-thermal power station

Abstract

The utility model discloses a ventilation device for a fused salt storage tank of a photo-thermal power station, and relates to the technical field of photo-thermal power stations. The ventilation device comprises a fused salt storage tank foundation, a plurality of ventilation pipes and a fused salt storage tank, wherein the ventilation pipes are arranged on the fused salt storage tank foundation at equal intervals, and the fused salt storage tank is arranged on the fused salt storage tank foundation and located over the middle ends of the ventilation pipes. The height adjusting mechanism and the filtering unit are arranged on the ventilation pipe, and the air supply assembly is arranged on the fused salt storage tank base. The height adjusting mechanism comprises a hollow frame, a servo motor, a vertical lead screw, a supporting block, a supporting transverse plate and an exhaust hose. The supporting block can drive the supporting transverse plate to be lifted and adjusted on the inner side of the hollow frame under the stress effect, the multiple exhaust hoses located on the same side of the fused salt storage tank foundation are driven by the supporting transverse plate, the height position can be integrally adjusted, and the filtering unit also ascends and descends synchronously. And the height of the exhaust end part on the equipment can be flexibly adjusted to cooperate with personnel to carry out maintenance and installation in a labor-saving manner.

Description

Technical Field

[0001] The utility model relates to the technical field of photothermal power stations, and in particular to a ventilation device for a molten salt storage tank in a photothermal power station. Background Art

[0002] The solar thermal power generation system can use the heat storage tank to store energy and transfer the energy when needed, so it has the ability to adjust the load. The solar thermal power station is one of the related facilities. In the solar thermal power station, the key to the design of the high-temperature molten salt storage tank lies in the design of the tank foundation. One of the keys to the design of the tank foundation is the design of the ventilation pipe. At present, the ventilation pipes of the high-temperature molten salt storage tanks in the commercially operated solar thermal power stations use natural convection heat exchange, which is a non-powered system. The heat dissipation effect of this form is subject to the influence of the atmospheric environment. When the wind speed in the area is lower than the design wind speed, the heat of the tank bottom foundation is not easy to dissipate, which is particularly prone to damage to the tank bottom foundation, resulting in the shutdown of the solar thermal power station and causing losses to the company.

[0003] The publication (announcement) number is CN208595665U, which discloses a ventilation device for the foundation of a molten salt storage tank in a solar thermal power station, including a molten salt storage tank, and at least a molten salt storage tank foundation, a ventilation pipe, a connecting pipe and a blower. The molten salt storage tank is installed on the molten salt storage tank foundation, the ventilation pipe is installed on the outside of the molten salt storage tank and the lower part of the ventilation pipe is located in the molten salt storage tank foundation, and the ventilation pipe is connected to the blower through the connecting pipe, which solves the problem that the ventilation pipe of the high-temperature molten salt storage tank in the solar thermal power station in the prior art adopts natural convection heat exchange and has no power system. The heat dissipation effect of this form is subject to the influence of the atmospheric environment. When the wind speed in the area is lower than the design wind speed, the heat of the tank bottom foundation is not easy to dissipate and it is easy to cause damage to the tank bottom foundation, resulting in shutdown of the solar thermal power station and increased losses. The device has a simple structure, is not affected by the local wind speed, can reduce the height of the ventilation pipe extending out of the ground, is easy to install, maintain and operate, and can improve the stability of the heat storage system.

[0004] Although the above scheme helps to dissipate the heat at the bottom of the molten salt storage tank by self-control, the position of the ventilation pipe is fixed and it is difficult to adjust the height of the exhaust end to cooperate with personnel maintenance and installation. Moreover, when the exhaust is stopped, foreign debris can easily enter from the exhaust end to cause blockage and affect the exhaust and heat dissipation efficiency. For this reason, we propose a ventilation device for the molten salt storage tank of a solar thermal power station. Utility Model Content

[0005] The main purpose of the utility model is to provide a ventilation device for a molten salt storage tank in a solar thermal power station. By setting a height adjustment mechanism and a filtering unit, the problems that the height of the exhaust end is difficult to adjust to facilitate maintenance and installation by personnel and that foreign matter can easily enter from the exhaust end to cause blockage and affect the exhaust heat dissipation efficiency are solved.

[0006] In order to solve the above technical problems, the utility model provides a ventilation device for a molten salt storage tank in a solar thermal power station, comprising a molten salt storage tank foundation and a molten salt storage tank, a plurality of ventilation pipes arranged at equal intervals on the molten salt storage tank foundation, the molten salt storage tank is located above the ventilation pipe, the ventilation device also comprises a height adjustment mechanism arranged on the ventilation pipe, a filter unit arranged at an air outlet of the ventilation pipe, and an air supply assembly arranged on the molten salt storage tank foundation, the air supply assembly is connected to the plurality of ventilation pipes; the height adjustment mechanism comprises a hollow frame, a servo motor, a vertical screw rod and a supporting cross plate, the hollow frame is fixedly arranged by the supporting plate It is arranged on the surface of one side of the molten salt storage tank foundation, the vertical screw is rotatably installed on the inner wall of one side of the hollow frame, the servo motor is arranged at the control end of the vertical screw, and its output shaft is connected with the vertical screw, the supporting cross plate is located in the hollow frame, and its end is threadedly connected with the vertical screw through a support block with an internal thread, and a plurality of through holes corresponding to the ventilation pipes are opened on the supporting cross plate, and each ventilation pipe extends to the air outlet outside the molten salt storage tank foundation and is connected with an exhaust hose, and the air outlet end of the exhaust hose passes through the corresponding through hole on the supporting cross plate and is fixed on the supporting cross plate; the filter unit is arranged at the air outlet end of the exhaust hose.

[0007] The preferred technical solution of the utility model is as follows: both ends of each ventilation pipe extend to the outside of the molten salt storage tank foundation, and both ends are provided with air outlets; the height adjustment mechanism is provided with two groups, which are symmetrically arranged on both sides of the molten salt storage tank foundation.

[0008] A better technical solution of the utility model: the height adjustment mechanism also includes a guide rod arranged on the inner wall of the other side of the hollow frame and parallel to the vertical screw rod, and the other side of the supporting cross plate is slidably connected to the guide rod through a slider.

[0009] The better technical solution of the utility model: each exhaust hose air outlet is provided with a filter unit; the filter unit comprises a mounting sleeve and a filter box, one end of the mounting sleeve is assembled on the outer peripheral surface of the exhaust hose air outlet end through an internal thread, the filter box is fixedly arranged on the other end of the mounting sleeve, and the filter box is inclined away from the side of the mounting sleeve, and filter holes are opened on the inclined slope of the filter box.

[0010] A better technical solution of the utility model: the air supply assembly includes a longitudinal air supply pipe and a blower, the longitudinal air supply pipe is connected with each ventilation pipe in sequence, the blower is fixedly installed on the basis of the molten salt storage tank, and its output end is connected with the air inlet end of the longitudinal air supply pipe.

[0011] A more optimal technical solution of the utility model is that the vertical screw rod and the ventilation pipe are arranged perpendicular to each other.

[0012] The preferred technical solution of the utility model is that the bottom surfaces of the two groups of hollow frames are connected as a whole through a connecting horizontal plate.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. In the utility model, the height of the exhaust port of the ventilation duct is adjusted by providing a height adjustment mechanism. In order to ensure that the normal installation of the ventilation duct will not be affected during the adjustment process, an exhaust hose is connected to the air outlet of the ventilation duct, and the air outlet of the exhaust hose is adjusted by the height adjustment mechanism, thereby realizing the adjustment of the height of the air outlet of the ventilation duct; during the adjustment process, the servo motor is used to control the vertical screw rod to rotate forward and reverse on the hollow frame, and one of the support blocks threadedly connected to the vertical screw rod can be subjected to force to drive the supporting cross plate and the exhaust hose fixed on the supporting cross plate to rise and fall on the inner side of the hollow frame, so that the exhaust end of the equipment can be flexibly adjusted in height to cooperate with personnel to carry out maintenance and installation with less effort.

[0015] 2. The utility model provides a filter unit at the exhaust port of each ventilation pipe. The filter unit is mounted on the outlet of the exhaust hose through an installation sleeve. The high-temperature gas enters the filter box through the exhaust hose and is discharged with the help of the filter holes on the inclined slope of the filter box. Large-sized foreign matter falling on the filter holes can be guided down by the inclined slope. After rotating and disassembling the installation sleeve, the filter box can be removed from the connecting pipe to centrally clear and remove small-sized foreign matter on the filter holes. The equipment is flexible in blocking foreign matter at the exhaust end and is convenient to clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0019] Figure 3 For this utility model Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0020] Figure 4 For this utility model Figure 2 Schematic diagram of the cross-sectional structure at the middle BB;

[0021] Figure 5 It is a side structural schematic diagram of the utility model.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1—molten salt storage tank foundation; 2—height adjustment mechanism; 201—hollow frame; 202—servo motor; 203—vertical screw rod; 204—support block; 205—support horizontal plate; 206—exhaust hose; 207—guide rod; 208—slider; 3—filter unit; 301—filter box; 302—installation sleeve; 303—filter hole; 4—ventilation pipe; 5—molten salt storage tank; 6—air supply assembly; 601—longitudinal air supply pipe; 602—blower; 7—connecting horizontal plate. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The embodiment provides a ventilation device for a molten salt storage tank in a solar thermal power station, such as Figures 1 to 4As shown, it includes a molten salt storage tank foundation 1, a plurality of ventilation pipes 4 arranged on the molten salt storage tank foundation 1 and arranged at equal intervals, a molten salt storage tank 5 arranged on the molten salt storage tank foundation 1 and located directly above the middle end of the ventilation pipe 4, the upper part of the ventilation pipe 4 of the molten salt storage tank foundation is open, and the molten salt storage tank foundation 1 is erected above the ventilation pipe 4 of the molten salt storage tank foundation through a foundation support. The ventilation device also includes a height adjustment mechanism 2 arranged on the ventilation pipe 4, a filter unit 3 arranged at the air outlet of the ventilation pipe 4, and an air supply assembly 6 arranged on the molten salt storage tank foundation 1, the air supply assembly 6 includes a longitudinal air supply pipe 601 and a blower 602, the longitudinal air supply pipe 601 is sequentially connected to each ventilation pipe 4, the blower 602 is fixedly installed on the molten salt storage tank foundation 1, and its output end is connected to the air inlet end of the longitudinal air supply pipe 601.

[0028] A ventilation device for a molten salt storage tank in a solar thermal power station is provided in an embodiment. Figures 1 to 4 As shown, the height adjustment mechanism 2 includes a hollow frame 201, a servo motor 202, a vertical screw rod 203 and a supporting cross plate 205. The hollow frame 201 is fixedly arranged on the surface of one side of the molten salt storage tank foundation 1 through the supporting plate, and the vertical screw rod 203 is rotatably installed on the inner wall of one side of the hollow frame 201. The servo motor 202 is arranged at the control end of the vertical screw rod 203, and its output shaft is connected to the vertical screw rod 203. The supporting cross plate 205 is located in the hollow frame 201, and its end is threadedly connected to the vertical screw rod 203 through a support block 204 with an internal thread. A plurality of through holes corresponding to the ventilation pipe 4 are opened on the supporting cross plate 205, and each ventilation pipe 4 extends to the air outlet outside the molten salt storage tank foundation 1 and is connected to an exhaust hose 206, and the air outlet end of the exhaust hose 206 passes through the corresponding through hole on the supporting cross plate 205 and is fixed on the supporting cross plate 205. The air outlet of each exhaust hose 206 is provided with a filter unit; the filter unit 3 comprises a mounting sleeve 302 and a filter box 301, one end of the mounting sleeve 302 is assembled on the outer peripheral surface of the air outlet end of the exhaust hose 206 through an internal thread, the filter box 301 is fixedly arranged on the other end of the mounting sleeve 302, and the side of the filter box 301 away from the mounting sleeve 302 is inclined, and a filter hole 303 is opened on the inclined slope of the filter box 301.

[0029] In one of the preferred embodiments, both ends of each ventilation pipe 4 extend to the outside of the molten salt storage tank foundation 1, and both ends are provided with air outlets; the height adjustment mechanism 2 is provided with two groups, symmetrically arranged on both sides of the molten salt storage tank foundation 1, and the bottom surfaces of the two groups of hollow frames 201 are connected as a whole through the connecting cross plate 7. The height adjustment mechanism 2 also includes a guide rod 207 arranged on the inner wall of the other side of the hollow frame 201 and parallel to the vertical screw rod 203, and the other side of the supporting cross plate 205 is slidably connected to the guide rod 207 through a slider 208. The vertical screw rod 203 and the ventilation pipe 4 are arranged perpendicular to each other.

[0030] The utility model allows the height of the exhaust end of the device to be flexibly adjusted through the height adjustment mechanism 2 to facilitate maintenance and installation by personnel. The filter unit 3 allows the device to flexibly block external debris at the exhaust end and facilitate clearing operations.

[0031] The working principle of the utility model is as follows: after one end of the exhaust hose 206 of the utility model is connected to the end surface of the ventilation pipe 4 extending to the outside of the molten salt storage tank foundation 1, the servo motor 202 is operated to control the vertical screw rod 203 to rotate forward and reverse on the hollow frame 201, and the support block 204 threadedly connected to the vertical screw rod 203 drives the support cross plate 205 to rise and fall inside the hollow frame 201 under the force, and the slider 208 on the other side slides and rises on the guide rod 207 to cooperate with the support cross plate 205 to adjust, and multiple exhaust hoses 206 located on the same side of the molten salt storage tank foundation 1 The supported horizontal plate 205 drives the overall height adjustment, and the filter unit 3 also rises and falls synchronously. The exhaust hose 206 fixedly arranged on the surface of one side of the supporting horizontal plate 205 discharges air into the installation sleeve 302 assembled on the outer peripheral surface of the exhaust hose 206 through the internal thread and enters the filter box 301. The high-temperature gas is finally discharged with the help of the filter hole 303 on the inclined slope of the filter box 301. Large-sized foreign matter falls on the filter hole 303 and is guided down by the inclined slope. After the installation sleeve 302 is rotated and disassembled, the small-sized foreign matter on the filter hole 304 is centrally cleared and removed.

[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A molten salt storage tank ventilation device for a solar thermal power station, comprising a molten salt storage tank foundation (1) and a molten salt storage tank (5), a plurality of ventilation pipes (4) arranged at equal intervals on the molten salt storage tank foundation (1), the molten salt storage tank (5) being located above the ventilation pipes (4), characterized in that: The ventilation device further comprises a height adjustment mechanism (2) arranged on the ventilation pipe (4), a filter unit (3) arranged at the air outlet of the ventilation pipe (4), and an air supply assembly (6) arranged on the molten salt storage tank foundation (1), wherein the air supply assembly (6) is connected to the plurality of ventilation pipes (4); the height adjustment mechanism (2) comprises a hollow frame (201), a servo motor (202), a vertical screw rod (203) and a supporting cross plate (205), wherein the hollow frame (201) is fixedly arranged on a side surface of the molten salt storage tank foundation (1) via a supporting plate, the vertical screw rod (203) is rotatably mounted on an inner wall of one side of the hollow frame (201), and the servo motor (202) is arranged on the vertical screw rod (203). The control end of the vertical screw rod (203) is connected to the output shaft of the vertical screw rod (203); the supporting cross plate (205) is located in the hollow frame (201); the end of the supporting cross plate (205) is threadedly connected to the vertical screw rod (203) through a support block (204) with an internal thread; a plurality of through holes corresponding to the ventilation pipes (4) are provided on the supporting cross plate (205); each ventilation pipe (4) extends to an air outlet outside the molten salt storage tank foundation (1) and is connected to an exhaust hose (206); and the air outlet end of the exhaust hose (206) passes through the corresponding through hole on the supporting cross plate (205) and is fixed on the supporting cross plate (205); the filtering unit (3) is arranged at the air outlet end of the exhaust hose (206).

2. A ventilation device for a molten salt storage tank of a solar thermal power station according to claim 1, characterized in that: Both ends of each ventilation pipe (4) extend to the outside of the molten salt storage tank foundation (1), and both ends are provided with air outlets respectively; the height adjustment mechanism (2) is provided with two groups, which are symmetrically arranged on both sides of the molten salt storage tank foundation (1).

3. A ventilation device for a molten salt storage tank in a CSP power station according to claim 1 or 2, characterized in that: The height adjustment mechanism (2) further comprises a guide rod (207) arranged on the inner wall of the other side of the hollow frame (201) and parallel to the vertical screw rod (203); the other side of the supporting horizontal plate (205) is slidably connected to the guide rod (207) via a slider (208).

4. A ventilation device for a molten salt storage tank in a CSP power station according to claim 1 or 2, characterized in that: The air outlet of each exhaust hose (206) is provided with a filter unit; the filter unit (3) comprises a mounting sleeve (302) and a filter box (301); one end of the mounting sleeve (302) is assembled on the outer peripheral surface of the air outlet end of the exhaust hose (206) through an internal thread; the filter box (301) is fixedly arranged on the other end of the mounting sleeve (302); and the side of the filter box (301) away from the mounting sleeve (302) is inclined; and a filter hole (303) is provided on the inclined slope of the filter box (301).

5. A ventilation device for a molten salt storage tank of a CSP power station according to claim 1 or 2, characterized in that: The air supply assembly (6) comprises a longitudinal air supply pipe (601) and a blower (602), wherein the longitudinal air supply pipe (601) is connected to each ventilation pipe (4) in sequence, and the blower (602) is fixedly installed on the molten salt storage tank foundation (1), and its output end is connected to the air inlet end of the longitudinal air supply pipe (601).

6. A ventilation device for a molten salt storage tank of a CSP power station according to claim 1 or 2, characterized in that: The vertical screw rod (203) and the ventilation pipe (4) are arranged perpendicular to each other.

7. A ventilation device for a molten salt storage tank of a CSP power station according to claim 2, characterized in that: The bottom surfaces of the two groups of hollow frames (201) are connected as one through a connecting transverse plate (7).

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