A secondary reheat boiler operation control device for a thermal power plant

Abstract

The present invention discloses an operation control device for a secondary reheat boiler in a thermal power plant, comprising a high-temperature superheater tube, a connecting block, a fixing block, a filter, a collection frame and a connecting rod, wherein a placement block is welded and fixed inside the high-temperature superheater tube, and a connecting block is arranged on the inner side of the placement block, and a barrier net is fixed by bolts on the lower surface of the connecting block, a fixing block is welded and fixed inside the connecting block, a rotating shaft is rotatably connected inside the high-temperature superheater tube, and a rotating fan is welded and fixed on the outer surface of the rotating shaft, and a filter is fixed by bolts inside the high-temperature superheater tube, a collection frame is arranged on the lower surface of the high-temperature superheater tube, and a connecting rod is threadedly connected to the lower surface of the high-temperature superheater tube. The operation control device for the secondary reheat boiler in a thermal power plant is provided with a rotating shaft, a filter, a rotating fan, a collection frame and a connecting rod, which is convenient for the staff to disassemble and install the collection frame, thereby making the high-pressure cylinder of the steam turbine work better.

Description

Technical Field

[0001] The invention relates to the technical field of thermal power plant boilers, in particular to an operation control device for a secondary reheat boiler in a thermal power plant. Background Art

[0002] Thermal power plants need to use boilers during the power generation process. The temperature of the steam in the boiler needs to be controlled by devices such as high-temperature superheater tubes to minimize the heat loss rate of the high-temperature steam and improve the energy utilization rate of the boiler. The high-temperature superheater tubes are composed of multiple groups of U-shaped pipe fittings.

[0003] However, most of the secondary reheat boiler operation control devices in thermal power plants currently have some shortcomings, such as:

[0004] 1. It is easy to burst. Some existing thermal power plant secondary reheat boiler operation control devices, such as high-temperature superheaters, need to be welded during installation, and welding slag is likely to remain inside. At the same time, long-term oxidation of steam will cause a certain amount of slag to fall off the inner wall of the high-temperature superheater tube. Driven by steam, the high-temperature superheater tube is likely to be blocked, and then it is easy to cause the high-temperature superheater tube to burst;

[0005] Second, it is easy to cause the high-pressure cylinder of the steam turbine to malfunction. Some existing secondary reheat boiler operation control devices of thermal power plants, such as high-temperature superheaters, when some smaller debris enters the direct connection section between the high-temperature superheater tube and the high-pressure cylinder of the steam turbine, due to the lack of an effective cleaning mechanism, the debris can easily cause the high-pressure cylinder of the steam turbine to malfunction, which in turn can easily affect the operation of the high-pressure cylinder of the steam turbine, resulting in a relatively lower power generation efficiency of the entire device.

[0006] Therefore, we propose a secondary reheat boiler operation control device for a thermal power plant to solve the above-mentioned problems. Summary of the invention

[0007] The object of the present invention is to provide an operation control device for a secondary reheat boiler in a thermal power plant to solve the problem that some existing operation control devices for secondary reheat boilers in thermal power plants, such as high-temperature superheaters, need to be welded during installation, and welding slag is likely to remain inside. At the same time, long-term oxidation of steam will cause a certain amount of debris to fall off the inner wall of the high-temperature superheater tube. Driven by steam, the high-temperature superheater tube may be easily blocked, and then the high-temperature superheater tube may be easily burst. In addition, some existing operation control devices for secondary reheat boilers in thermal power plants, such as high-temperature superheaters, when some smaller debris enters the direct connection section where the high-temperature superheater tube and the high-pressure cylinder of the steam turbine are connected, due to the lack of an effective cleaning mechanism, the debris may easily cause the high-pressure cylinder of the steam turbine to malfunction, and then easily affect the operation of the high-pressure cylinder of the steam turbine, thereby resulting in a relatively reduced power generation efficiency of the entire device.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a secondary reheat boiler operation control device for a thermal power plant, comprising a high-temperature superheater tube, a connecting block, a fixing block, a filter screen, a collecting frame and a connecting rod, wherein a placement block is welded and fixed inside the high-temperature superheater tube, and a connecting block is arranged on the inner side of the placement block, and a barrier screen is bolted to the lower surface of the connecting block, a fixing block is welded and fixed inside the connecting block, a rotating shaft is rotatably connected inside the high-temperature superheater tube, and a rotating fan is welded and fixed on the outer surface of the rotating shaft, and a filter screen is bolted to the inside of the high-temperature superheater tube, a collecting frame is arranged on the lower surface of the high-temperature superheater tube, and a filter screen is bolted to the inside of the high-temperature superheater tube. The lower surface of the high-temperature superheater tube is threadedly connected with a connecting rod, a discharge port is opened on the lower surface of the high-temperature superheater tube, and the discharge port is located in the middle of the U-shaped end of the high-temperature superheater tube, and the inner surface of the high-temperature superheater tube is fitted with the outer surface of the connecting block, the fixed block is welded and fixed to the inside of the connecting block at equal angles, and the fixed block is inclined, and the connecting block is located at the steam rising part inside the high-temperature superheater tube, the rotating shaft and the filter screen form a rotating structure, and the lower surface of the filter screen is fitted with the middle upper surface of the collecting frame, the collecting frame is in a "W" shape, and the connection method between the collecting frame and the connecting rod is a threaded connection, and the two sides and the middle of the collecting frame form an elastic structure.

[0009] Preferably, the connecting block and the placing block form an inlaid rotating structure, and the upper diameter of the placing block is smaller than the lower diameter thereof.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] (1) The secondary reheat boiler operation control device of the thermal power plant is provided with a discharge port, a placement block, a connection block, a barrier net and a fixed block. By blowing steam to the inclined fixed block, the connection block can be rotated on the placement block, so that the filter net can block the debris, so that the debris falls to the U-shaped part of the high-temperature superheater tube, and the staff can regularly clean the debris by opening the discharge port, thereby ensuring the safety of the operation of the high-temperature superheater tube and relatively reducing the possibility of the high-temperature superheater tube bursting;

[0012] (2) The secondary reheat boiler operation control device of the thermal power plant is provided with a rotating shaft, a filter screen, a rotating fan, a collecting frame and a connecting rod. The steam drives the rotating fan to rotate, thereby rotating the rotating shaft, and then the cleaning rod on the rotating shaft filters the filter screen, so that the debris falls into the collecting frame, so that the staff can release the restriction of the collecting frame by screwing the connecting rod, and then it is convenient for the staff to disassemble and install the collecting frame, so that the high-pressure cylinder of the steam turbine can work better. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the front cross-sectional structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the top view of the connecting block of the present invention;

[0015] Figure 3 For the present invention Figure 1 Schematic diagram of the structure at A in the middle;

[0016] Figure 4 For the present invention Figure 1 Schematic diagram of the structure at point B in the middle.

[0017] In the figure: 1. high-temperature superheater tube; 101. discharge port; 2. placement block; 3. connection block; 4. barrier net; 5. fixing block; 6. rotating shaft; 7. filter net; 8. rotating fan; 9. collection frame; 10. connecting rod. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-4The present invention provides a technical solution: a secondary reheat boiler operation control device for a thermal power plant, comprising a high-temperature superheater tube 1, a discharge port 101, a placement block 2, a connection block 3, a barrier net 4, a fixing block 5, a rotating shaft 6, a filter net 7, a rotating fan 8, a collecting frame 9 and a connecting rod 10, wherein the placement block 2 is welded and fixed inside the high-temperature superheater tube 1, and the connection block 3 is arranged on the inner side of the placement block 2, and the barrier net 4 is fixed to the lower surface of the connecting block 3 with bolts, the fixing block 5 is welded and fixed inside the connecting block 3, the rotating shaft 6 is rotatably connected inside the high-temperature superheater tube 1, and the rotating fan 8 is welded and fixed on the outer surface of the rotating shaft 6, and the filter net 7 is fixed to the inner side of the high-temperature superheater tube 1 with bolts, and the lower surface of the high-temperature superheater tube 1 is arranged with a filter net 7, and the lower surface of the high-temperature superheater tube 1 is provided with a filter net 7, and the filter net 7 is fixed to the inner side of the high-temperature superheater tube 1 with bolts. There is a collecting frame 9, and the lower surface of the high-temperature superheater tube 1 is threadedly connected with a connecting rod 10, and a discharge port 101 is opened on the lower surface of the high-temperature superheater tube 1, and the discharge port 101 is located in the middle of the U-shaped end of the high-temperature superheater tube 1, and the inner surface of the high-temperature superheater tube 1 is in contact with the outer surface of the connecting block 3, which is convenient for the staff to clean the waste chips at the U-shaped end of the high-temperature superheater tube 1, thereby reducing the possibility of blockage of the high-temperature superheater tube 1, and further reducing the possibility of bursting of the high-temperature superheater tube 1, the fixing block 5 is welded and fixed to the inside of the connecting block 3 at equal angles, and the fixing block 5 is inclined, and the connecting block 3 is located at the steam rising part inside the high-temperature superheater tube 1, so that the high-temperature superheater tube 1 can work better.

[0020] The rotating shaft 6 and the filter screen 7 form a rotating structure, and the lower surface of the filter screen 7 fits with the middle upper surface of the collecting frame 9, so that the entire device can automatically clean the filter screen 7, reducing the workload of the staff.

[0021] The shape of the collecting frame 9 is "W"-shaped, and the connection between the collecting frame 9 and the connecting rod 10 is a threaded connection, and the two sides and the middle of the collecting frame 9 form an elastic structure, which can reduce the possibility of failure of the high-pressure cylinder of the steam turbine.

[0022] The connecting block 3 and the placing block 2 form an inlaid rotating structure, and the upper diameter of the placing block 2 is smaller than the lower diameter thereof, so that the barrier net 4 can clean the waste chips to the discharge port 101 .

[0023] Working principle: First, according to Figure 1-4As shown, when the high-temperature steam flows inside the high-temperature superheater tube 1, it blows toward the fixed block 5, because the connecting block 3 and the placing block 2 form an inlaid rotating structure, and the upper diameter of the placing block 2 is smaller than the lower diameter thereof, and the fixed block 5 is welded and fixed inside the connecting block 3 at equal angles, and the fixed block 5 is inclined, and the connecting block 3 is located at the rising position of the steam inside the high-temperature superheater tube 1, so that the connecting block 3 can be rotated, and then the barrier net 4 can clean the waste to the discharge port 101, and then it is convenient for the staff to clean the waste, thereby reducing the possibility of blockage and bursting of the high-temperature superheater tube 1;

[0024] When steam blows toward the rotating fan 8, the rotating fan 8 drives the rotating shaft 6 to rotate, so that the cleaning rod on the rotating shaft 6 cleans the filter 7, so that the waste on the filter 7 falls into the collecting frame 9. Because the collecting frame 9 is in a "W" shape, and the connection between the collecting frame 9 and the connecting rod 10 is a threaded connection, and the two sides and the middle of the collecting frame 9 form an elastic structure, the connecting rod 10 releases the limit on the collecting frame 9 by rotation. The staff pinches the two sides of the collecting frame 9 to disassemble the collecting frame 9, thereby reducing the possibility of failure of the high-pressure cylinder of the steam turbine. This is the use process of the secondary reheat boiler operation control device of the thermal power plant. The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A secondary reheat boiler operation control device for a thermal power plant, comprising a high-temperature superheater tube (1), a connecting block (3), a fixing block (5), a filter screen (7), a collecting frame (9) and a connecting rod (10), characterized in that: A placement block (2) is welded and fixed inside the high-temperature superheater tube (1), and a connection block (3) is provided on the inner side of the placement block (2), and a barrier net (4) is bolted to the lower surface of the connection block (3), a fixing block (5) is welded and fixed inside the connection block (3), a rotating shaft (6) is rotatably connected inside the high-temperature superheater tube (1), and a rotating fan (8) is welded and fixed to the outer surface of the rotating shaft (6), and a filter net (7) is bolted to the inside of the high-temperature superheater tube (1), a collecting frame (9) is provided on the lower surface of the high-temperature superheater tube (1), and a connecting rod (10) is threadedly connected to the lower surface of the high-temperature superheater tube (1), and a discharge port ( 101), and the discharge port (101) is located in the middle of the U-shaped end of the high-temperature superheater tube (1), and the inner surface of the high-temperature superheater tube (1) is in contact with the outer surface of the connecting block (3), the fixing block (5) is welded and fixed inside the connecting block (3) at equal angles, and the fixing block (5) is inclined, and the connecting block (3) is located at the steam rising position inside the high-temperature superheater tube (1), the rotating shaft (6) and the filter screen (7) form a rotating structure, and the lower surface of the filter screen (7) is in contact with the middle upper surface of the collecting frame (9), the outer shape of the collecting frame (9) is "W"-shaped, and the connection between the collecting frame (9) and the connecting rod (10) is a threaded connection, and the two sides and the middle of the collecting frame (9) form an elastic structure.

2. The operation control device for a secondary reheat boiler in a thermal power plant according to claim 1, characterized in that: The connecting block (3) and the placement block (2) form an inlaid rotating structure, and the upper diameter of the placement block (2) is smaller than the lower diameter thereof.

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