Flue gas denitration device for thermal power plant

Abstract

The invention relates to the technical field of flue gas denitration, in particular to a flue gas denitration device for a thermal power plant, which comprises a sealing assembly, a mounting piece, a connecting piece arranged on the mounting piece, a rotating piece arranged on the connecting piece and a clinging piece arranged on the rotating piece; the flow guide assembly comprises a flow guide part arranged in the mounting part and an adjusting part arranged on the mounting part; the dismounting and mounting assembly comprises a downward pressing piece arranged in the mounting piece and a buckling piece arranged on the downward pressing piece. The rotating piece drives the attaching piece to be attached to the smoke inlet, smoke generated by the boiler enters the device through the smoke exhaust pipe, the smoke exhaust pipe and the smoke inlet are sealed, smoke leakage is prevented, the flow path and speed distribution of the smoke can be changed through the flow guide plate with the angle capable of being adjusted, the smoke is guided to be evenly distributed to enter the catalyst layer, and the catalyst layer is protected. The catalyst can be quickly disassembled and assembled through the disassembling and assembling assembly, and can be independently replaced according to a catalyst activity evaluation result, so that the overall replacement cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas denitration, and in particular to a flue gas denitration device for a thermal power plant. Background Art

[0002] In reality, the combustion of boilers in thermal power plants will produce a large amount of flue gas, which contains a large amount of nitrogen oxides (NOx), which is one of the main sources of air pollution. It will not only cause environmental problems such as acid rain and photochemical smog, but also cause harm to human health. Therefore, thermal power plants and other industries that emit a lot of nitrogen oxides need to install denitrification devices to reduce NOx emissions and meet environmental protection requirements. The use of denitrification devices helps to reduce the emission of these pollutants and protect the environment and human health.

[0003] The denitrification device in actual use sprays ammonia into the flue gas to fully mix the ammonia and flue gas. Ammonia and NOx in the flue gas undergo a selective catalytic reduction reaction under the action of a catalyst. The flue gas after the reaction continues to be discharged into the atmosphere through the flue system. However, if the flue gas inlet of the flue gas denitrification device is not sealed with the boiler's exhaust pipe, the flue gas will leak into the surrounding environment from the inlet, which will not only cause excessive pollutant emissions, but may also cause harm to the surrounding environment and human health. In addition, since part of the flue gas does not enter the denitrification device, the amount of flue gas passing through the device is reduced, resulting in insufficient denitrification reaction and reduced denitrification efficiency. In addition, eddies and dead corners may be generated in the flow of flue gas. These areas often have high flue gas concentrations and low flow rates, which affect the uniform distribution of the flue gas, thereby reducing the catalytic efficiency. In addition, the catalyst is usually fixed on the device, making it difficult to quickly disassemble and assemble. When replacing, it needs to be replaced as a whole, which is costly. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] The present invention is proposed in view of the problems that smoke may leak at the smoke inlet of the above-mentioned device, the smoke flow is uneven, and the catalyst is difficult to be quickly disassembled and assembled.

[0006] Therefore, the object of the present invention is to provide a flue gas denitration device for a thermal power plant.

[0007] In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: a flue gas denitrification device for a thermal power plant, comprising a sealing assembly, including a mounting part, a connecting part arranged on the mounting part, a rotating part arranged on the connecting part, and a clamping part arranged on the rotating part; a guide assembly, including a guide part arranged in the mounting part, and an adjusting part arranged on the mounting part; and a disassembly and assembly assembly, including a pressing part arranged in the mounting part, and a snap-fit ​​part arranged on the pressing part.

[0008] As a preferred solution of the flue gas denitrification device for a thermal power plant described in the present invention, the mounting member includes a shell, a supporting rod arranged on the shell, a smoke inlet arranged on the shell, a smoke exhaust port arranged on the shell, and a baffle arranged on the shell.

[0009] As a preferred solution of the flue gas denitration device for a thermal power plant of the present invention, the connecting piece includes a receiving tube arranged on the smoke inlet and a rubber sheet arranged on the receiving tube.

[0010] As a preferred solution of the flue gas denitrification device for thermal power plants described in the present invention, the rotating member includes a rotating ring arranged on the receiving tube, a tripod arranged on the rotating ring, and a threaded rod arranged on the tripod.

[0011] As a preferred solution of the flue gas denitrification device for a thermal power plant described in the present invention, the clamping member includes a fixed plate arranged on the threaded rod, a movable plate arranged on the threaded rod, a top rod arranged on the movable plate, and a top block arranged on the top rod.

[0012] As a preferred solution of the flue gas denitrification device for thermal power plants of the present invention, two top rods are provided and are symmetrically arranged, and the top rod away from the movable plate is arranged on the fixed plate.

[0013] As a preferred solution of the flue gas denitrification device for thermal power plants of the present invention, the guide member includes a connecting rod arranged in the shell, a guide plate arranged on the connecting rod, and a cylindrical pin arranged on the guide plate.

[0014] As a preferred solution of the flue gas denitrification device for thermal power plants described in the present invention, the regulating member includes an electric push rod arranged on the shell, a push plate arranged on the output end of the electric push rod, and an arc groove arranged on the push plate.

[0015] As a preferred embodiment of the flue gas denitrification device for a thermal power plant according to the present invention, the pressing member includes a placing plate arranged in the shell, a spring arranged on the placing plate, an L-shaped telescopic plate arranged on the spring, a catalyst arranged on the L-shaped telescopic plate, and a slot opened on the catalyst.

[0016] As a preferred solution of the flue gas denitrification device for a thermal power plant according to the present invention, the fastener comprises a vertical plate arranged on the placement plate, an opening opened on the vertical plate, and a card block arranged in the opening.

[0017] The beneficial effects of the present invention are as follows: the present invention drives the pressing part to press against the smoke inlet by rotating the rotating part, so that the smoke generated by the boiler enters the device through the smoke exhaust pipe, and the smoke exhaust pipe and the smoke inlet are sealed, thereby effectively preventing the leakage of the smoke. By setting a guide plate with an adjustable angle, the flow path and velocity distribution of the smoke can be changed to guide the smoke to enter the catalyst layer in an evenly distributed manner, and by setting a disassembly and assembly component, the catalyst can be quickly disassembled and assembled, and can be replaced individually according to the catalyst activity evaluation results, thereby reducing the overall replacement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is an overall schematic diagram of a flue gas denitrification device for a thermal power plant.

[0020] Figure 2 The present invention is a schematic diagram of a connecting part, a rotating part and a fastening part of a flue gas denitration device for a thermal power plant.

[0021] Figure 3 The present invention is a cross-sectional view of a connecting piece, a rotating piece and a fastening piece of a flue gas denitration device for a thermal power plant.

[0022] Figure 4 It is a cross-sectional view of a flue gas denitrification device for a thermal power plant.

[0023] Figure 5 for Figure 4 Enlarged view of point A in .

[0024] Figure 6 The present invention is a cross-sectional view of the disassembled and assembled components of a flue gas denitration device for a thermal power plant.

[0025] Figure 7 for Figure 6Enlarged view of point B in . DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] Example 1

[0031] Reference Figure 1-Figure 7 , which is the first embodiment of the present invention, and provides a flue gas denitration device for a thermal power plant, comprising a sealing assembly 100, comprising a mounting member 101, used to receive a connecting member 102, the connecting member 102 arranged on the mounting member 101, used to connect the entire device with the exhaust pipe of the boiler flue gas, a rotating member 103 arranged on the connecting member 102, driving a pressing member 104 to press against the inner wall of the connecting pipe, and the pressing member 104 arranged on the rotating member 103, which can be rotated by the rotating member 103 To adjust the opening size; the guide component 200 includes a guide member 201 arranged in the mounting member 101, which guides the flow direction of the smoke in the device, and an adjusting member 202 arranged on the mounting member 101, which is used to adjust the angle of the guide member 201; and a disassembly and assembly component 300, including a pressing member 301 arranged in the mounting member 101, which drives the fastener 302 to rotate when pressed down, and a fastener 302 arranged on the pressing member 301, which establishes a fastening connection with the pressing member 301.

[0032] Specifically, the mounting member 101 includes a shell 101a, a supporting rod 104c fixedly connected to the bottom of the shell 101a, a smoke inlet 101c arranged on the shell 101a, a smoke exhaust port 101e arranged on the shell 101a, and a baffle 101f rotatably connected to one side of the shell 101a. The shell 101a serves to contain the smoke, the supporting rod 104c provides support for the shell 101a, the smoke inlet 101c is connected to the boiler exhaust pipe for conveying the smoke, and the smoke is discharged through the smoke exhaust port 101e after denitrification for the next step.

[0033] Furthermore, the connecting member 102 includes a receiving tube 102a rotatably connected to the smoke inlet 101c, and a rubber sheet 102b fixedly connected to the receiving tube 102a. The receiving tube 102a is hollow, and one end of the receiving tube 102a away from the smoke inlet 101c is connected to the boiler smoke exhaust pipe. The rubber sheet 102b is used to seal the smoke. Two rubber sheets 102b are provided and are symmetrically arranged.

[0034] Furthermore, the rotating member 103 includes a swivel 103a rotatably connected to the receiving tube 102a, a tripod 103b fixedly connected to the swivel 103a, and a threaded rod 103c fixedly connected to the tripod 103b. The swivel 103a is used to drive the tripod 103b to rotate, and the tripod 103b is used to receive the threaded rod 103c. When the threaded rod 103c rotates, it drives the clamping member 104 to open. There are two swivels 103a, tripods 103b and threaded rods 103c, which are symmetrically arranged and are respectively connected to the smoke inlet 101c and the boiler smoke exhaust pipe.

[0035] Further, the clamping member 104 includes a fixed plate 104a rotatably connected to the threaded rod 103c, a movable plate 104b threadedly connected to the threaded rod 103c, and a top rod 104c rotatably connected to the movable plate 104b. The top rods 104c are provided with two and are symmetrically arranged. The top rod 104c away from the movable plate 104b is arranged on the fixed plate 104a and the top block 104d rotatably connected to the top rod 104c. The fixed plate 104a will not rotate with the rotation of the threaded rod 103c. The movable plate 104b drives the push rod 104c to push up, and the push rod 104c drives the push block 104d to move upward. The fixed plate 104a and the movable plate 104b are each provided with two and are symmetrically arranged. The two symmetrical push rods 104c and the push block 104d are provided with multiple groups and are evenly distributed in a circle. Connecting rods are provided between the multiple push blocks 104d to fill the gaps generated when the push blocks 104d are opened. The end of the rubber sheet 102b away from the receiving tube 102a is fixedly connected to the push block 104d.

[0036] Operation process: When the receiving tube 102a is aligned with the smoke inlet 101c and inserted into the boiler smoke exhaust pipe, the two rubber sheets 102b enter the smoke inlet 101c and the boiler smoke exhaust pipe respectively. At this time, the rotating ring 103a is rotated, and the rotating ring 103a drives the tripod 103b and the threaded rod 103c to rotate. The rotation of the threaded rod 103c drives the moving plate 104b to move on the threaded rod 103c. When the moving plate 104b moves, it drives The top rod 104c rotatably connected thereon moves closer to the top rod 104c rotatably connected on the fixed plate 104a, and the two top rods 104c lift up the top block 104d, and the multiple top blocks 104d open to open the rubber sheet 102b, so that the rubber sheet 102b is close to the smoke inlet 101c or the boiler smoke exhaust pipe, and the exhaust pipe and the smoke inlet 101c are sealed, which effectively prevents the leakage of smoke and avoids the harm of smoke leakage to the environment and personnel.

[0037] Example 2

[0038] Reference Figure 4-Figure 5 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the guide member 201 includes a connecting rod 201a fixedly connected to the inner wall of the shell 101a, a guide plate 201b rotatably connected to the connecting rod 201a, and a cylindrical pin 201c fixedly connected to the side of the guide plate 201b. The connecting rod 201a is used to carry the guide plate 201b, the guide plate 201b is used to guide the flow direction of the smoke, and the cylindrical pin 201c is used to connect the adjusting member 202. The connecting rod 201a, the guide plate 201b and the cylindrical pin 201c are all provided in plurality and are evenly distributed in the horizontal direction.

[0039] Specifically, the adjusting member 202 includes an electric push rod 202a arranged on the shell 101a, a push plate 202b fixedly connected to the output end of the electric push rod 202a, and an arc groove 202c opened on the push plate 202b. The electric push rod 202a provides a driving force for the push plate 202b. The push plate 202b moves inside the shell 101a as the electric push rod 202a pushes. The cylindrical pin 201c is slidably connected in the arc groove 202c. The arc groove 202c is used to provide guidance for the guide plate 201b. There are multiple arc grooves 202c and they are evenly distributed in the horizontal direction, corresponding to the number of the guide plates 201b.

[0040] The rest of the structure is the same as that of Example 1.

[0041] Operation process: When the electric push rod 202a is started, since the output end of the electric push rod 202a is fixedly connected to the push plate 202b, the push plate 202b moves in the shell 101a as the electric push rod 202a pushes, and the multiple arc grooves 202c move with the movement of the push plate 202b, and the multiple guide plates 201b are driven by the cylindrical pin 201c to rotate on the connecting rod 201a, so as to adjust the angles of the multiple guide plates 201b, change the flow path and velocity distribution of the flue gas, and guide the flue gas to be evenly distributed into the catalyst 301d layer, thereby effectively improving the catalytic efficiency.

[0042] Example 3

[0043] Reference Figure 6-Figure 7 , which is the third embodiment of the present invention. This embodiment is different from the above embodiments in that: the pressing member 301 includes a placing plate 301a fixedly connected to the inner wall of the housing 101a, a spring 301b fixedly connected to the placing plate 301a, an L-shaped telescopic plate 301c fixedly connected to the spring 301b, a catalyst 301d disposed on the L-shaped telescopic plate 301c, and a slot 301e provided on the catalyst 301d. The placing plate 301a is used to receive the spring 301b and the vertical plate 301c. 02a, the spring 301b provides elastic force for the L-shaped telescopic plate 301c, and one end of the L-shaped telescopic plate 301c away from the spring 301b is fixedly connected to the side of the placement plate 301a. The catalyst 301d is used to catalyze the reduction of the mixed ammonia and flue gas to generate nitrogen and water. The slot 301e is used to connect the fastener 302. The placement plate 301a, the L-shaped telescopic plate 301c, and the slot 301e are all provided in multiple and symmetrical arrangements, and the catalyst 301d is provided with two and symmetrical arrangements.

[0044] Specifically, the fastener 302 includes a vertical plate 302a fixedly connected to the placement plate 301a, an opening 302b opened on the vertical plate 302a, and a block 302c rotatably connected to the opening 302b. The vertical plate 302a is used to receive the block 302c. The size of the opening 302b is adapted to the size of the block 302c. The block 302c is rotatably connected to the end of the L-shaped telescopic plate 301c. The block 302c is U-shaped, and one end of the block 302c away from the L-shaped telescopic plate 301c is stuck in the slot 301e. The vertical plate 302a, the opening 302b and the block 302c are all provided in plurality and are symmetrically arranged.

[0045] The rest of the structure is the same as that of Example 2.

[0046] Operation process: When the catalyst 301d needs to be replaced, the baffle 101f is opened, the catalyst 301d is pulled out, and the new catalyst 301d is put back into the shell 101a. The two ends of the catalyst 301d are respectively placed on two L-shaped telescopic rods, the L-shaped telescopic rods are pressed down and contracted, the spring 301b is tightened, and the block 302c is driven by the downward pressure of the L-shaped telescopic rod to rotate in the opening 302b opened on the vertical plate 302a, and the end of the block 302c is stuck in the slot 301e opened on the catalyst 301d to fix the catalyst 301d. By setting the disassembly and assembly component 300, the catalyst 301d can be quickly disassembled and assembled, and can be replaced separately according to the activity evaluation result of the catalyst 301d, thereby reducing the overall replacement cost.

[0047] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0048] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0049] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A flue gas denitrification device for a thermal power plant, characterized in that: include, A sealing assembly (100) comprises a mounting member (101), a connecting member (102) arranged on the mounting member (101), a rotating member (103) arranged on the connecting member (102), and a tightening member (104) arranged on the rotating member (103); A flow guide assembly (200), comprising a flow guide member (201) arranged in the mounting member (101), and an adjustment member (202) arranged on the mounting member (101); and, The disassembly assembly (300) comprises a pressing member (301) arranged in the mounting member (101), and a locking member (302) arranged on the pressing member (301).

2. The flue gas denitration device for thermal power plants according to claim 1, characterized in that: The mounting member (101) comprises a shell (101a), a supporting rod (104c) arranged on the shell (101a), a smoke inlet (101c) arranged on the shell (101a), a smoke exhaust port (101e) arranged on the shell (101a), and a baffle (101f) arranged on the shell (101a).

3. The flue gas denitration device for thermal power plants according to claim 2, characterized in that: The connecting member (102) comprises a receiving tube (102a) arranged on the smoke inlet (101c), and a rubber sheet (102b) arranged on the receiving tube (102a).

4. The flue gas denitration device for a thermal power plant according to claim 3, characterized in that: The rotating member (103) comprises a rotating ring (103a) arranged on the receiving tube (102a), a tripod (103b) arranged on the rotating ring (103a), and a threaded rod (103c) arranged on the tripod (103b).

5. The flue gas denitration device for thermal power plants according to claim 4, characterized in that: The clamping member (104) comprises a fixed plate (104a) arranged on the threaded rod (103c), a movable plate (104b) arranged on the threaded rod (103c), a push rod (104c) arranged on the movable plate (104b), and a push block (104d) arranged on the push rod (104c).

6. The flue gas denitration device for a thermal power plant according to claim 5, characterized in that: Two push rods (104c) are provided and are symmetrically arranged, and the push rod (104c) away from the movable plate (104b) is arranged on the fixed plate (104a).

7. The flue gas denitration device for a thermal power plant according to claim 6, characterized in that: The flow guide member (201) comprises a connecting rod (201a) arranged in the housing (101a), a flow guide plate (201b) arranged on the connecting rod (201a), and a cylindrical pin (201c) arranged on the flow guide plate (201b).

8. The flue gas denitration device for a thermal power plant according to claim 7, characterized in that: The regulating member (202) comprises an electric push rod (202a) arranged on the housing (101a), a push plate (202b) arranged on the output end of the electric push rod (202a), and an arc groove (202c) arranged on the push plate (202b).

9. The flue gas denitration device for a thermal power plant according to claim 8, characterized in that: The pressing member (301) comprises a placement plate (301a) arranged in the shell (101a), a spring (301b) arranged on the placement plate (301a), an L-shaped telescopic plate (301c) arranged on the spring (301b), a catalyst (301d) arranged on the L-shaped telescopic plate (301c), and a slot (301e) opened on the catalyst (301d).

10. The flue gas denitration device for a thermal power plant according to claim 9, characterized in that: The fastener (302) comprises a vertical plate (302a) arranged on the placement plate (301a), an opening (302b) opened on the vertical plate (302a), and a clamping block (302c) arranged in the opening (302b).

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