Sawtooth type denitration catalyst module and denitration reactor

Abstract

The utility model relates to a sawtooth type denitration catalyst module and a denitration reactor, and the sawtooth type denitration catalyst module comprises a module box body which is communicated along a flue and is matched with the width of the flue, catalyst unit bodies and bearing plates, wherein the catalyst unit bodies and the bearing plates are arranged in the module box body along the width direction of the flue at intervals one by one; any catalyst unit body is connected with the adjacent bearing plate, the face-to-face included angle delta between the adjacent catalyst unit body and the bearing plate is larger than 0 degree and smaller than 90 degrees, and meanwhile the number N of the catalyst units, the width A of the box body and the length B of the catalyst units meet the condition that N is larger than or equal to A / B. According to the sawtooth type denitration catalyst module, the bearing capacity of the module can be improved through the bearing plate, the catalyst unit bodies are obliquely arranged, the surface area of the catalyst unit bodies is effectively increased, the flow speed in channels of the catalyst unit bodies is reduced, and therefore the resistance of a catalyst SCR system is reduced, and the sawtooth type denitration catalyst module can be better suitable for an SCR horizontal flue.

Description

Technical Field

[0001] This utility model relates to the field of gas denitrification catalyst arrangement technology, specifically to a sawtooth denitrification catalyst module and a denitrification reactor. Background Technology

[0002] Selective catalytic reduction (SCR) refers to the process of using a reducing agent (such as NH3, liquid ammonia, or urea) to selectively react with NO in flue gas under the action of a catalyst. x The reaction produces non-toxic and pollution-free N2 and H2O. With the gradual achievement of ultra-low NOx emissions from coal-fired units, under the same emission standards, the NOx emissions per kilowatt-hour from gas-fired units will decrease. x Emissions from gas-fired units are approximately 1.45 times that of coal-fired units, therefore achieving NOx emission reduction for gas-fired units is crucial. x The demand for ultra-low emission technologies is becoming increasingly urgent. Due to the horizontal arrangement of SCR flues in some gas turbine power plants and the limited space reserved for SCR, the load on the bottom catalyst module is high and the resistance requirements of the gas turbine system are very strict. Therefore, it is necessary to propose a new catalyst module with low resistance and high load-bearing capacity suitable for horizontal SCR flues. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies and provide a sawtooth-type denitrification catalyst module and denitrification reactor with low resistance and high load-bearing capacity suitable for SCR horizontal flues.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] Based on one aspect of this utility model, a sawtooth-type denitrification catalyst module is provided, comprising a module box that runs through the flue and is adapted to the width of the flue, catalyst units and load-bearing plates arranged alternately in the module box along the width direction of the flue, each catalyst unit being connected to an adjacent load-bearing plate, and the face angle δ between adjacent catalyst units and load-bearing plates being greater than 0° and less than 90°, while the number N of catalyst units, the width A of the box, and the length B of the catalyst units satisfy N≥A / B.

[0006] In one embodiment, the load-bearing plate is arranged perpendicular to the module housing along a vertical plane.

[0007] In one embodiment, the catalyst units arranged at intervals are tilted in the same direction within the module housing.

[0008] In one embodiment, the included angle δ between the surfaces is 60° ≥ δ ≥ 10°.

[0009] In one embodiment, the load-bearing plate is a steel plate with a thickness of 1-10 mm.

[0010] In one embodiment, any of the catalyst unit and the adjacent load-bearing plate and the adjacent module box are sealingly connected.

[0011] In one embodiment, the catalyst unit body comprises a plurality of catalyst units arranged in a matrix, and the catalyst unit body is sealingly bonded by high-temperature bonding material between the catalyst units.

[0012] In one embodiment, the catalyst unit body comprises n catalyst units arranged in a matrix, and the number n of the catalyst units satisfies: n≤B / 150.

[0013] In one embodiment, the catalyst unit is a honeycomb catalyst, and the cell type of the honeycomb catalyst is any one of 40 cells, 45 cells, 50 cells, 55 cells, 70 cells, 80 cells, 90 cells, 108 cells, and 120 cells.

[0014] Based on another aspect of the utility model, a denitration reactor is provided, which comprises the zigzag denitration catalyst module according to any one of the above.

[0015] Compared with the prior art, the zigzag denitration catalyst module and the denitration reactor have the following advantages:

[0016] (1) The independent module architecture is adopted, which is convenient for disassembly, transportation and on-site installation, and has no wear risk;

[0017] (2) The flow speed of flue gas in the catalyst unit hole is effectively reduced, and the effective contact time of flue gas and catalyst is increased;

[0018] (3) The catalyst is transitioned from the "laminar flow" form of straight-through arrangement to the "turbulent flow" form, which strengthens the gas dynamics reaction effect;

[0019] (4) The catalyst system pressure drop is adjustable within a certain range, and the face-to-face angle δ of the catalyst unit body and the load-bearing plate and the length B of the catalyst unit body are adjusted; the lower the angle δ, the lower the hole flow speed, and the lower the pressure drop; the shorter the length B of the catalyst unit body, the lower the pressure drop, and the pressure drop is reduced by 50%-80% compared with the traditional straight-through module structure, which can effectively reduce the energy consumption of the gas turbine unit and increase the active power of the unit;

[0020] (5) The added load-bearing plate greatly improves the load-bearing capacity of the catalyst module by 20-50%, and the load-bearing stress distribution is more uniform, which can be directly used for multi-module arrangement of the horizontal flue.

[0021] Other advantages of this invention will be described in detail in the following detailed description section with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0023] In the attached diagram:

[0024] Figure 1 This is a schematic diagram of the structure of a first embodiment of a sawtooth denitrification catalyst module of the present invention, wherein arrow C indicates the direction of flue gas flow;

[0025] Figure 2 for Figure 1 The diagram shows a three-dimensional structure of the sawtooth-shaped denitrification catalyst module.

[0026] Figure 3 This is a schematic diagram of the second embodiment of a sawtooth denitrification catalyst module of the present invention, wherein arrow C indicates the direction of flue gas flow;

[0027] Figure 4 for Figure 3 The diagram shows the three-dimensional structure of the sawtooth-shaped denitrification catalyst module.

[0028] Explanation of reference numerals in the attached diagram: 1 Module housing, 2 Catalyst unit, 3 Load-bearing plate, 21 Catalyst unit. Detailed Implementation

[0029] To further explain the technical solution of this utility model, the following detailed description is provided in conjunction with the accompanying drawings, in which the same reference numerals denote the same components.

[0030] Example 1

[0031] like Figure 1 and Figure 2 As shown, this embodiment provides a sawtooth-type denitrification catalyst module, including a module box 1 that runs through the flue and is adapted to the width of the flue, catalyst units 2 arranged alternately along the width of the flue inside the module box 1, and a load-bearing plate 3. The plane of the load-bearing plate 3 is parallel to the central axis of the flue and arranged perpendicular to the module box 1 along a vertical plane. Each catalyst unit 2 is connected to an adjacent load-bearing plate 3, and the angle δ between the surfaces of adjacent catalyst units 2 and load-bearing plates 3 is 60°≥δ≥10°. At the same time, the number N of catalyst units 21, the width A of the box 1, and the length B of catalyst units 21 satisfy N≥A / B.

[0032] In the embodiment, the spaced-apart catalyst units 2 are arranged in the same direction in the module box 1, and the bearing plates 3 are steel plates with a thickness of 1-10 mm. Any catalyst unit 2 is connected to the adjacent bearing plate 3 and the adjacent module box 1 (the catalyst unit 2 at the edge is connected to the inner wall of the module box 1) by a sealing angle steel. The included angle δ between the adjacent catalyst unit 2 and the bearing plate 3 is 60°≥δ≥10°, and one catalyst unit 2 and one adjacent bearing plate 3 form a zigzag catalyst unit group. The catalyst units 2 and the bearing plates 3 arranged in the module box 1 form a zigzag arrangement. The steel plate, i.e., the bearing plate 3, is arranged perpendicular to the module box 1 along the vertical plane to increase the load bearing of the catalyst module. The catalyst unit 2 is arranged obliquely to effectively increase the surface area of the catalyst unit 2 and reduce the flow rate in the catalyst unit 21 channel, thereby reducing the resistance of the catalyst SCR system. The catalyst units 2 and the bearing plates 3 arranged in the module box 1 form a zigzag catalyst unit group, which reduces the system resistance and increases the load bearing capacity of the catalyst module.

[0033] In the embodiment, the catalyst unit 2 includes a plurality of catalyst units 21 arranged in a matrix. The catalyst units 21 of the catalyst unit 2 are sealed and bonded by high-temperature bonding materials. The catalyst unit 2 includes n catalyst units 21 arranged in a matrix. The number n of catalyst units 21 satisfies n≤B / 150. The catalyst unit 21 is a honeycomb catalyst. The honeycomb catalyst has any one of 45 holes, 50 holes, 55 holes, and 70 holes.

[0034] Based on the above embodiment one, a denitration reactor including the zigzag denitration catalyst module is also provided. The number and size of the zigzag denitration catalyst module in the denitration reactor are determined according to the actual size and denitration performance of the reactor. The denitration reactor including the zigzag denitration catalyst module changes the traditional straight-through module arrangement form, adopts an independent catalyst unit group module architecture, is convenient to disassemble, transport, and install on site, and has no wear risk. The bearing plate is arranged perpendicular to the module box along the vertical plane to increase the load bearing of the catalyst module. The load bearing capacity of the catalyst module is increased by 20-50%, and the stress distribution is more uniform. The catalyst unit is arranged obliquely to effectively increase the surface area of the catalyst unit, effectively reduce the flow rate of the flue gas in the catalyst unit channel, increase the effective contact time of the flue gas and the catalyst, transition the catalyst from the "laminar flow" form to the "turbulent flow" form, strengthen the gas dynamics reaction effect, reduce the pressure drop of the catalyst system by 50%-80%, effectively reduce the energy consumption of the gas turbine unit, and increase the active power of the unit.

[0035] Embodiment two

[0036] As Figure 3 and Figure 4 shown, the embodiment provides a serrated denitration catalyst module, which comprises a module box 1 through a flue and adapted to the flue width, catalyst unit bodies 2 arranged one by one along the flue width direction in the module box 1, and bearing plates 3, the plane of the bearing plates 3 being parallel to the central axis of the flue and arranged perpendicular to the module box 1 along a vertical plane, any catalyst unit body 2 being connected with the adjacent bearing plate 3 and the face-face included angle δ between the adjacent catalyst unit bodies 2 and the bearing plates 3 being 60°≥δ≥10°, and the number N of catalyst unit bodies 21, the width A of the box 1, and the length B of the catalyst unit 21 satisfying N≥A / B.

[0037] In the embodiment, the spaced catalyst unit bodies 2 are arranged symmetrically around the center line of the module box 1, and the bearing plates 3 are steel plates with a thickness of 1-10 mm. Any catalyst unit body 2 is sealed and connected with the adjacent bearing plate 3 and the adjacent module box 1 (the catalyst unit body 2 located at the edge part will be adjacent to the inner wall of the module box 1) by using a sealing angle steel. The face-face included angle δ between the adjacent catalyst unit bodies 2 and the bearing plates 3 is 60°≥δ≥10°, and one catalyst unit body 2 and one adjacent bearing plate 3 form a serrated catalyst unit group. The catalyst unit bodies 2 and the bearing plates 3 arranged one by one in the module box 1 form a serrated arrangement. Arranging the steel plate, i.e. the bearing plate 3, perpendicular to the module box 1 along a vertical plane can increase the load bearing of the catalyst module. The catalyst unit bodies 2 are arranged obliquely, which can effectively increase the surface area of the catalyst unit bodies 2, reduce the flow rate in the catalyst unit 21 channel, and thus reduce the resistance of the catalyst SCR system.

[0038] In the embodiment, the catalyst unit body 2 comprises a plurality of catalyst units 21 arranged in a matrix, and the catalyst units 21 of the catalyst unit body 2 are sealed and bonded by using high-temperature bonding materials. The catalyst unit body 2 comprises n catalyst units 21 arranged in a matrix, and the number n of catalyst units 21 satisfies: n≤B / 150. The catalyst unit 21 is a honeycomb catalyst, and the cell type of the honeycomb catalyst can be any one of 45 cells, 50 cells, 55 cells, and 70 cells.

[0039] Based on the above embodiment two, also provide a kind of denitration reactor comprising the sawtooth denitration catalyst module as described in above embodiment two, in denitration reactor, the quantity, size of sawtooth denitration catalyst module is determined according to the actual size of reactor and the size of denitration performance.Such as the denitration reactor comprising the sawtooth denitration catalyst module described above, change the traditional straight-through module arrangement form, adopt independent catalyst unit group module architecture, facilitate disassembly, transportation and on-site installation, no wear risk;Supporting plate is arranged perpendicular to module box along vertical plane, can increase the load bearing of catalyst module, the load bearing capacity of catalyst module is improved by 20-50%, load bearing stress distribution is more uniform, can be directly used for the multi-module arrangement of horizontal flue;Catalyst unit body is arranged obliquely, can effectively increase the surface area of catalyst unit body, effectively reduce the flow velocity of flue gas in catalyst unit hole, increase the effective contact time of flue gas and catalyst, transition catalyst from "laminar flow" form of straight-through arrangement to "turbulent flow" form, strengthen gas dynamics reaction effect, catalyst system pressure drop reduces by 50%-80%, effectively reduce the energy consumption of gas turbine unit, increase the active power of unit.

[0040] The above is only the specific implementation of the present application, it should be noted that any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A zigzag denitration catalyst module characterized by, The module box (1) is arranged along the flue and is adapted to the width of the flue, the catalyst unit bodies (2) and the load-bearing plates (3) are arranged in the module box (1) along the width direction of the flue, any catalyst unit body (2) is connected with the adjacent load-bearing plate (3), the face-to-face included angle δ between the adjacent catalyst unit bodies (2) and the load-bearing plate (3) is greater than 0° and less than 90°, and the number N of the catalyst unit bodies (21), the width A of the box (1) and the length B of the catalyst unit (21) satisfy N≥A / B.

2. The zigzag denitration catalyst module according to claim 1, wherein, The load-bearing plate (3) is arranged perpendicularly to the module box (1) along a vertical plane.

3. The zigzag de-NOx catalyst module according to claim 1 or 2, wherein The catalyst unit bodies (2) arranged at intervals are arranged in the same direction in the module box (1).

4. The zigzag de-NOx catalyst module according to claim 1 or 2, wherein The face-to-face included angle δ is 60°≥δ≥10°.

5. The zigzag de-NOx catalyst module according to claim 1 or 2, wherein The load-bearing plate (3) is a steel plate with a thickness of 1-10 mm.

6. The zigzag de-NOx catalyst module according to claim 1 or 2, wherein Any catalyst unit body (2) is sealingly connected with the adjacent load-bearing plate (3) and the adjacent module box (1).

7. The zigzag de-NOx catalyst module according to claim 1 or 2, wherein The catalyst unit body (2) comprises a plurality of catalyst units (21) arranged in a matrix, and the catalyst units (21) of the catalyst unit body (2) are sealingly bonded by high-temperature bonding materials.

8. The zigzag de-NOx catalyst module according to claim 7, wherein The catalyst unit body (2) comprises n catalyst units (21) arranged in a matrix, and the number n of the catalyst units (21) satisfies n≤B / 150.

9. The zigzag de-NOx catalyst module according to claim 7, wherein The catalyst unit (21) is a honeycomb catalyst, and the cell type of the honeycomb catalyst is any one of 40 cells, 45 cells, 50 cells, 55 cells, 70 cells, 80 cells, 90 cells, 108 cells and 120 cells.

10. A denitration reactor characterized by, The denitration reactor comprises the zigzag denitration catalyst module according to any one of claims 1-9.

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