Wide-load denitration device for thermal power plant boiler

Abstract

The utility model relates to the technical field of thermal power plant boilers, in particular to a thermal power plant boiler wide load denitration device which comprises a boiler body, an exhaust fan and an auxiliary assembly, the exhaust fan is installed on the surface of the boiler body, a guide pipe is installed at the output end of the exhaust fan, a denitration mechanism is installed at the output end of the guide pipe, and the auxiliary assembly is installed on the boiler body. The desulfurization mechanism is mounted at the output end of the denitration mechanism, and the auxiliary assembly is arranged on the lower surface of the exhaust fan. And the auxiliary assembly comprises a connecting unit, the connecting unit comprises a mounting frame, the mounting frame is fixedly connected with the lower surface of the exhaust fan, the inner wall of the mounting frame is rotationally connected with a positioning rotating shaft, and the side surface of the positioning rotating shaft is fixedly connected with a force bearing plate. According to the utility model, the auxiliary assembly is arranged, so that the stability of the connecting part of the equipment is improved, the problems that the equipment vibrates during working and bolts are easy to loosen are reduced, and the firmness of the connecting part of the equipment is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power plant boilers, in particular to a wide-load denitration device for thermal power plant boilers. Background Art

[0002] The boiler of a thermal power plant is a vital component of the thermal power generation system. It converts chemical energy into thermal energy by burning fuel, heating water to produce high-temperature and high-pressure steam. The fuel burns in the furnace, releasing a large amount of heat, which is absorbed by the water-cooled wall, turning the water into steam. The steam enters the superheater for further heating, and after reaching the specified temperature and pressure, it is sent to the steam turbine to do work. During the operation of the boiler in a thermal power plant, the flue gas generated is often filtered with the help of a denitrification device.

[0003] Prior art includes a utility model with announcement number CN209549129U, which discloses a wide-load denitration system for a thermal power plant boiler. The patent adopts a boiler, an exhaust fan, a first heat exchanger, a second heat exchanger, a dust removal device and an SNCR. One side of the boiler is connected to the SNCR, and the middle part of the upper surface of the boiler is fixedly connected to the exhaust fan by bolts, and one end of the exhaust fan is fixedly connected to an exhaust duct by bolts. The utility model provides an exhaust fan at the top of the boiler, and collects the flue gas remaining on the top of the boiler through the exhaust fan and centrally transports it to the first heat exchanger and the second heat exchanger, so that the flue gas temperature is effectively matched with the outside temperature to avoid liquid leakage caused by temperature difference. The occurrence of desulfurization or gasification phenomenon is then effectively achieved in the dust removal device to remove impurities. The flue gas is then treated by the desulfurization device and the desulfurization device and then discharged through the one-way valve, thereby greatly improving the desulfurization efficiency of the boiler and removing the residual flue gas on the top of the boiler. This solves the problem that when the boiler is desulfurized in the prior art, a certain amount of flue gas will remain on the top of the boiler and needs to be treated, and the single SNCR desulfurization process cannot effectively remove the flue gas on the top of the boiler. Therefore, it is necessary to carry out effective desulfurization of the flue gas in the boiler and to have targeted desulfurization equipment to remove it. However, the desulfurization system for this method in the prior art is not perfect enough, so it cannot meet the problems required by the prior art.

[0004] In the process of using thermal power plant boilers to generate electricity, there are existing thermal power plant boilers such as the above-mentioned thermal power plant boilers that fix the duct to the exhaust mechanism by bolts. Since the exhaust mechanism will vibrate during operation, the bolts will become loose due to the vibration when they are fixed, which will lead to deviations in the fit between the connection parts and cause gas leakage. At the same time, maintenance personnel are required to frequently check the bolts, which increases the cost of manpower and material resources. Utility Model Content

[0005] The utility model aims to solve the problems in the prior art that when the bolts are loose, the fitting deviation between the connection parts occurs, causing gas leakage, and the maintenance personnel need to frequently check the bolts, which increases the manpower and material costs. A wide-load denitrification device for a thermal power plant boiler is proposed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a wide-load denitration device for a thermal power plant boiler, comprising a boiler body, an exhaust fan and an auxiliary component, wherein the exhaust fan is installed on the surface of the boiler body, a guide pipe is installed at the output end of the exhaust fan, a denitration mechanism is installed at the output end of the guide pipe, a desulfurization mechanism is installed at the output end of the denitration mechanism, and the auxiliary component is arranged on the lower surface of the exhaust fan;

[0007] The auxiliary component includes a connection unit, and the connection unit includes a mounting frame, the mounting frame is fixedly connected to the lower surface of the exhaust fan, the inner wall of the mounting frame is rotatably connected with a positioning shaft, the side surface of the positioning shaft is fixedly connected with a force-carrying plate, the side surface of the mounting frame is fixedly connected with a threaded ring, the inner wall of the mounting frame is inserted with a limit pin, the side surface of the limit pin is fixedly connected with a T-shaped shaft, the surface of the T-shaped shaft is rotatably connected with a fixing knob, the fixing knob is threadedly connected to the inner wall of the threaded ring, the side surface of the force-carrying plate is provided with a slot, and the limit pin is plugged into the inner wall of the slot;

[0008] The auxiliary component also includes a clamping unit, which includes a positioning plate, a side surface of which is fixedly connected to a buffer spring, a side surface of which is fixedly connected to a damping telescopic column, a side surface of which is fixedly connected to a connecting plate, a side surface of which is fixedly connected to a support column, a side surface of which is fixedly connected to a splint, and the splint abuts against the surface of the guide tube.

[0009] Preferably, the raised portion of the force-carrying plate is located on the inner wall of the mounting frame, and the end face of the raised portion of the force-carrying plate is arc-shaped. By designing the end face of the raised portion of the force-carrying plate to be arc-shaped, it can be ensured that the force-carrying plate rotates smoothly in the mounting frame, thereby reducing the chance of the force-carrying plate getting stuck.

[0010] Preferably, the threaded ring is connected to the inner wall of the mounting frame, and there are two threaded rings, which are symmetrically arranged with respect to the mounting frame. The threaded ring installed on the side surface of the mounting frame allows the staff to install a fixed knob to ensure that the position of the fixed knob can be limited.

[0011] Preferably, there are two limit pins, which are symmetrically arranged with respect to the mounting frame. The limit pins are rectangular, and the position of the force-carrying plate can be limited by inserting the limit pins into the slots to ensure that the force-carrying plate can achieve its own supporting effect.

[0012] Preferably, the number of the buffer springs is four, and the four buffer springs are diagonally arranged with respect to the positioning plate. The buffer springs are fixedly connected to the side surface of the connecting plate. By installing the buffer springs on the side of the connecting plate, the vibration of the connecting plate can be absorbed, thereby reducing the vibration of the guide tube.

[0013] Preferably, the damping telescopic column is located on the inner wall of the buffer spring. The damping telescopic column installed on the surface of the positioning plate can guide the deformation direction of the buffer spring and reduce the reset elastic force of the buffer spring when the buffer spring is reset.

[0014] Compared with the prior art, the advantages and positive effects of the utility model are:

[0015] In the utility model, by setting auxiliary components, when the equipment is working, the exhaust fan draws out the flue gas generated in the boiler body, and the flue gas enters the denitrification structure under the guidance of the guide pipe, and the denitrification mechanism processes the nitrates in the flue gas. When the flue gas is processed and enters the desulfurization mechanism, the desulfurization mechanism processes the sulfides in the flue gas. After the guide pipe is installed to the output end of the exhaust fan, the limit pin is removed, and the force-carrying plate loses the constraint of the limit pin, and the force-carrying plate is rotated. The force-carrying plate pushes the positioning plate under the guidance of the positioning shaft, and the positioning plate cooperates with the damping telescopic column to push the connecting plate. The connecting plate is forced to push the supporting column and the splint, and the splint reaches the surface of the guide pipe during movement, and then the limit pin is reinserted into the slot, and waits for the fixed rotation When the button enters the threaded ring, rotate the fixed knob, the fixed knob is screwed into the threaded ring and limits the position of the limit pin, and then the installation of the auxiliary component is completed; when the exhaust mechanism is working, the guide tube will generate vibration and guide it to the splint, the splint cooperates with the support column to guide the vibration to the connecting plate, the connecting plate will guide the generated vibration to the buffer spring and the damping telescopic column, the buffer spring and the damping telescopic column absorb the vibration of the guide tube, thereby reducing the vibration of the guide tube and the chance of bolt loosening. By setting the auxiliary component, the stability of the connection part of the equipment is improved, thereby reducing the vibration generated when the equipment is working, which easily leads to the problem of bolt loosening, and further improves the firmness of the connection part of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model provides a three-dimensional structural schematic diagram of a wide-load denitration device for a thermal power plant boiler;

[0017] Figure 2 The utility model provides a schematic diagram of the structure of a wide-load denitration device for a thermal power plant boiler from a top view;

[0018] Figure 3 The utility model provides a schematic diagram of the expanded structure of a wide-load denitration device for a thermal power plant boiler;

[0019] Figure 4 The utility model provides a schematic diagram of the auxiliary component structure of a wide-load denitration device for a thermal power plant boiler;

[0020] Figure 5 The utility model provides a partial structural schematic diagram of a wide-load denitration device for a thermal power plant boiler.

[0021] Legend:

[0022] 1. Boiler body; 2. Exhaust fan; 3. Guide pipe; 4. Denitrification mechanism; 5. Desulfurization mechanism; 6. Auxiliary components; 61. Connection unit; 611. Mounting frame; 612. Positioning shaft; 613. Load-bearing plate; 614. Threaded ring; 615. Limit pin; 616. T-shaped shaft; 617. Fixing knob; 618. Slot; 62. Clamping unit; 621. Positioning plate; 622. Buffer spring; 623. Damping telescopic column; 624. Connecting plate; 625. Support column; 626. Clamp. DETAILED DESCRIPTION

[0023] See also Figure 1-Figure 5 The utility model provides a technical solution: a wide-load denitration device for a thermal power plant boiler, comprising a boiler body 1, an exhaust fan 2 and an auxiliary component 6, the exhaust fan 2 is installed on the surface of the boiler body 1, a guide pipe 3 is installed at the output end of the exhaust fan 2, a denitration mechanism 4 is installed at the output end of the guide pipe 3, a desulfurization mechanism 5 is installed at the output end of the denitration mechanism 4, and the auxiliary component 6 is arranged on the lower surface of the exhaust fan 2.

[0024] In this embodiment: the auxiliary component 6 includes a connection unit 61, and the connection unit 61 includes a mounting frame 611, the mounting frame 611 is fixedly connected to the lower surface of the exhaust fan 2, the inner wall of the mounting frame 611 is rotatably connected with a positioning shaft 612, the side surface of the positioning shaft 612 is fixedly connected with a force-carrying plate 613, the side surface of the mounting frame 611 is fixedly connected with a threaded ring 614, the inner wall of the mounting frame 611 is inserted with a limit pin 615, the side surface of the limit pin 615 is fixedly connected with a T-shaped shaft 616, the surface of the T-shaped shaft 616 is rotatably connected with a fixing knob 617, the fixing knob 617 is threadedly connected to the inner wall of the threaded ring 614, the side surface of the force-carrying plate 613 is provided with a slot 618, and the limit pin 615 is plugged into the inner wall of the slot 618;

[0025] The auxiliary component 6 also includes a clamping unit 62, which includes a positioning plate 621, a side surface of which is fixedly connected to a buffer spring 622, a side surface of which is fixedly connected to a damping telescopic column 623, a side surface of which is fixedly connected to a connecting plate 624, a side surface of which is fixedly connected to a support column 625, a side surface of which is fixedly connected to a splint 626, and the splint 626 abuts against the surface of the guide tube 3.

[0026] Specifically, the raised portion of the force-carrying plate 613 is located on the inner wall of the mounting frame 611, and the end face of the raised portion of the force-carrying plate 613 is arc-shaped. By designing the end face of the raised portion of the force-carrying plate 613 to be arc-shaped, it can be ensured that the force-carrying plate 613 rotates smoothly in the mounting frame 611, thereby reducing the chance of the force-carrying plate 613 getting stuck.

[0027] Specifically, the threaded ring 614 is communicated with the inner wall of the mounting frame 611 . There are two threaded rings 614 , and the two threaded rings 614 are disposed symmetrically with respect to the mounting frame 611 .

[0028] In this embodiment: a threaded ring 614 installed on the side surface of the mounting frame 611 allows a worker to install a fixing knob 617 to ensure that the position of the fixing knob 617 can be restricted.

[0029] Specifically, there are two limit pins 615, which are symmetrically arranged with respect to the mounting frame 611. The limit pins 615 are rectangular, and the position of the force-carrying plate 613 can be limited by inserting the limit pins 615 into the slots 618 to ensure that the force-carrying plate 613 can achieve its own supporting effect.

[0030] In this embodiment, the number of the buffer springs 622 is four, and the four buffer springs 622 are arranged diagonally with respect to the positioning plate 621 . The buffer springs 622 are fixedly connected to the side surface of the connecting plate 624 .

[0031] In this embodiment, the buffer spring 622 installed on the side of the connecting plate 624 can absorb the vibration received by the connecting plate 624, thereby reducing the vibration of the guide tube 3.

[0032] Specifically, the damping telescopic column 623 is located on the inner wall of the buffer spring 622. The damping telescopic column 623 installed on the surface of the positioning plate 621 can guide the deformation direction of the buffer spring 622. At the same time, when the buffer spring 622 is deformed and reset, the reset elastic force of the buffer spring 622 can be reduced.

[0033] Working principle: When the equipment is working, the exhaust fan 2 extracts the flue gas generated in the boiler body 1, and the flue gas enters the denitration structure under the guidance of the guide pipe 3. The denitration mechanism 4 processes the nitrates in the flue gas. When the flue gas is processed and enters the desulfurization mechanism 5, the desulfurization mechanism 5 processes the sulfides in the flue gas. After the guide pipe 3 is installed to the output end of the exhaust fan 2, the limit pin 615 is removed, and the force-carrying plate 613 loses the constraint of the limit pin 615, and the force-carrying plate 613 is rotated. The force-carrying plate 613 pushes the positioning plate 621 under the guidance of the positioning shaft 612. The positioning plate 621 cooperates with the damping telescopic column 623 to push the connecting plate 624. The connecting plate 624 is forced to push the supporting column 625 and the clamping plate 626. The clamping plate 626 resists during movement. To the surface of the guide tube 3, then reinsert the limit pin 615 into the slot 618, and when the fixing knob 617 enters the threaded ring 614, rotate the fixing knob 617, and the fixing knob 617 is screwed into the threaded ring 614 to limit the position of the limit pin 615, and then the installation of the auxiliary component 6 is completed; when the exhaust fan 2 is working, the guide tube 3 will generate vibration and guide it to the splint 626, and the splint 626 cooperates with the support column 625 to guide the vibration to the connecting plate 624, and the connecting plate 624 guides the generated vibration to the buffer spring 622 and the damping telescopic column 623, and the buffer spring 622 and the damping telescopic column 623 absorb the vibration of the guide tube 3, thereby reducing the vibration of the guide tube 3 and reducing the chance of loosening of the bolts.

Claims

1. A wide-load denitration device for a thermal power plant boiler, comprising a boiler body (1), an exhaust fan (2) and an auxiliary component (6), characterized in that: The exhaust fan (2) is mounted on the surface of the boiler body (1); a guide pipe (3) is mounted on the output end of the exhaust fan (2); a denitration mechanism (4) is mounted on the output end of the guide pipe (3); a desulfurization mechanism (5) is mounted on the output end of the denitration mechanism (4); and the auxiliary component (6) is arranged on the lower surface of the exhaust fan (2); The auxiliary component (6) comprises a connection unit (61), the connection unit (61) comprises a mounting frame (611), the mounting frame (611) is fixedly connected to the lower surface of the exhaust fan (2), the inner wall of the mounting frame (611) is rotatably connected to a positioning shaft (612), the side surface of the positioning shaft (612) is fixedly connected to a force-carrying plate (613), the side surface of the mounting frame (611) is fixedly connected to a threaded ring (614), the inner wall of the mounting frame (611) is provided with a limit pin (615), the side surface of the limit pin (615) is fixedly connected to a T-shaped shaft (616), the surface of the T-shaped shaft (616) is rotatably connected to a fixing knob (617), the fixing knob (617) is threadedly connected to the inner wall of the threaded ring (614), the side surface of the force-carrying plate (613) is provided with a slot (618), the limit pin (615) is plugged into the inner wall of the slot (618); The auxiliary component (6) further comprises a clamping unit (62), wherein the clamping unit (62) comprises a positioning plate (621), a side surface of the positioning plate (621) being fixedly connected to a buffer spring (622), a side surface of the positioning plate (621) being fixedly connected to a damping telescopic column (623), a side surface of the damping telescopic column (623) being fixedly connected to a connecting plate (624), a side surface of the connecting plate (624) being fixedly connected to a supporting column (625), a side surface of the supporting column (625) being fixedly connected to a clamping plate (626), and the clamping plate (626) being in contact with the surface of the guide tube (3).

2. A wide load denitration device for boilers in thermal power plants according to claim 1, characterized in that: The raised portion of the force-carrying plate (613) is located on the inner wall of the mounting frame (611), and the end surface of the raised portion of the force-carrying plate (613) is arc-shaped.

3. A wide load denitration device for boilers in thermal power plants according to claim 1, characterized in that: The threaded ring (614) is in communication with the inner wall of the mounting frame (611), there are two threaded rings (614), and the two threaded rings (614) are arranged in a left-right symmetrical manner with respect to the mounting frame (611).

4. A wide load denitration device for boilers in thermal power plants according to claim 1, characterized in that: The number of the limit pins (615) is two, and the two limit pins (615) are arranged in a left-right symmetrical manner with respect to the mounting frame (611), and the limit pins (615) are rectangular.

5. A wide load denitration device for boilers in thermal power plants according to claim 1, characterized in that: The number of the buffer springs (622) is four, and the four buffer springs (622) are arranged diagonally with respect to the positioning plate (621), and the buffer springs (622) are fixedly connected to the side surface of the connecting plate (624).

6. A wide load denitration device for boilers in thermal power plants according to claim 1, characterized in that: The damping telescopic column (623) is located on the inner wall of the buffer spring (622).

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